Water hammer prevention damping mechanism for valve

Abstract

The utility model belongs to the technical field of valve water hammer prevention, and particularly relates to a valve water hammer prevention damping mechanism which comprises a fixed pipe, the bottom face of the fixed pipe is fixedly communicated with a sliding pipe, a connecting rod is jointly arranged in the fixed pipe and the sliding pipe, a floating ball is arranged in the sliding pipe, and the bottom face of the connecting rod is fixedly connected with the upper surface of the floating ball. Two connecting frames are fixedly connected to the outer surface of the connecting rod, pressure sensors are fixedly connected to the side faces, away from each other, of the two connecting frames, two friction plates and two friction blocks are arranged in the fixing pipe, and the friction force between the two friction plates and the friction blocks can be accurately detected in real time through cooperation of the pressure sensors, the friction plates and the friction blocks; when a water hammer is generated, the pressure sensor transmits a friction force change signal to the controller, meanwhile, the displacement sensor synchronously monitors rising displacement of the floating ball to form two-parameter feedback, and meanwhile, the controller conducts coupling analysis on pressure and displacement data according to a preset algorithm.

Description

Technical Field

[0001] This utility model belongs to the technical field of valve waterproof hammer, specifically relating to a valve waterproof hammer damping mechanism. Background Technology

[0002] A valve water hammer damping mechanism is a functional device installed inside the valve or in an auxiliary system. It suppresses water hammer damage to pipelines and equipment by consuming fluid kinetic energy, slowing down the valve closing speed, or buffering pressure fluctuations. Its core principle is to convert the instantaneous high pressure generated by water hammer into controllable mechanical energy loss through damping force regulation.

[0003] However, in practical applications, the adjustment efficiency and accuracy of the valve's water hammer damping mechanism have always been key bottlenecks restricting its effectiveness. The existing traditional mechanical adjustment mode relies heavily on manual intervention. Operators need to use special tools such as wrenches and screwdrivers to repeatedly tighten and loosen the adjusting bolts or disassemble and replace the throttling element. Such operations are not only lengthy and cumbersome, with each adjustment often taking tens of minutes or even hours, but also lack standardized quantitative basis and rely too much on the operator's experience and judgment, which can easily lead to inaccurate damping parameter settings, thereby weakening the water hammer protection effect and seriously affecting the safety and stability of the pipeline system.

[0004] To address the aforementioned problems, this application proposes a valve water hammer damping mechanism. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a valve water hammer damping mechanism, which features improved adjustment efficiency and accuracy of the valve water hammer damping mechanism.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a valve water hammer damping mechanism, comprising a fixed tube, a sliding tube fixedly connected to the bottom surface of the fixed tube, a connecting rod being provided inside both the fixed tube and the sliding tube, a float being provided inside the sliding tube, the bottom surface of the connecting rod being fixedly connected to the upper surface of the float, two connecting frames being fixedly connected to the outer surface of the connecting rod, pressure sensors being fixedly connected to the two connecting frames on their opposite sides, two friction plates and two friction blocks being respectively provided inside the fixed tube, and a displacement sensor being fixedly connected inside the connecting rod;

[0007] The two friction blocks, on their opposite sides, are in contact with the two friction plates, on their opposite sides. The opposite sides of the two friction blocks are in contact with the sensing end of the pressure sensor. Two sets of telescopic frames are fixedly connected to the inner wall of the fixed tube. The telescopic end of each set of telescopic frames is fixedly connected to the opposite sides of the two friction plates. Two electric push rods are provided on the outer side of the fixed tube. A controller is provided above the fixed tube.

[0008] As a preferred embodiment of this utility model, the upper surface of the fixed tube is movably hinged with an opening and closing door, and the upper surface of the opening and closing door is fixedly connected with a handle.

[0009] As a preferred embodiment of this utility model, a connecting plate is fixedly connected to the upper surface of the opening and closing door, and the upper surface of the connecting plate is fixedly connected to the bottom surface of the controller.

[0010] As a preferred embodiment of this utility model, each of the two electric push rods is fixedly connected to a fixing frame at one end that is far apart from each other, and the two fixing frames are fixedly connected to the outer surface of the fixing tube at one side that is close to each other.

[0011] As a preferred embodiment of this utility model, each of the electric push rods has a connecting ring fixedly connected to its telescopic end, and the two connecting rings are fixedly connected to the sides of the two friction plates that are far apart from each other.

[0012] As a preferred technical solution of this utility model, a sealing ring is slidably connected to the outer surface of the telescopic end of each of the electric push rods, and the side of the two sealing rings that are close to each other is fixedly connected to the outer surface of the fixed tube.

[0013] As a preferred technical solution of this utility model, two sets of telescopic rods are fixedly connected to the two connecting frames on their opposite sides, and the telescopic ends of each set of telescopic rods are fixedly connected to the opposite sides of the two friction blocks.

[0014] As a preferred embodiment of this utility model, a flange is fixedly connected to the bottom surface of the sliding tube, and the upper surface of the flange is provided with fixing holes arranged at equal intervals.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: by cooperating with the pressure sensor, friction plate, and friction block, the friction force between the two can be detected in real time and accurately. When water hammer occurs, the pressure sensor transmits the friction force change signal to the controller, while the displacement sensor synchronously monitors the upward displacement of the float, forming a dual-parameter feedback. At the same time, the controller performs coupled analysis of pressure and displacement data according to a preset algorithm, accurately drives the electric push rod to adjust the position of the friction plate, and dynamically matches the optimal damping force. This design not only realizes a rapid response to water hammer pressure, but also predicts the development trend of water hammer in advance through the displacement feedback mechanism, which significantly improves the adjustment accuracy compared with the traditional control method. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the fixed tube in this utility model;

[0019] Figure 3 This is a schematic diagram of the opening and closing door in this utility model;

[0020] Figure 4 This is a schematic diagram of the friction plate in this utility model;

[0021] Figure 5 This is a cross-sectional view of the friction block in this utility model;

[0022] Figure 6 This is a cross-sectional view of the sliding tube in this utility model;

[0023] In the diagram: 1. Fixed pipe; 2. Opening / closing door; 3. Electric push rod; 4. Sliding pipe; 5. Flange; 6. Connecting plate; 7. Handle; 8. Controller; 9. Telescopic frame; 10. Friction plate; 11. Connecting ring; 12. Sealing ring; 13. Fixed frame; 14. Connecting rod; 15. Connecting frame; 16. Telescopic rod; 17. Pressure sensor; 18. Friction block; 19. Float; 20. Fixing hole; 21. Displacement sensor. Detailed Implementation

[0024] 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. Example

[0025] Please see Figure 1-6 The present invention provides the following technical solution: a valve water hammer damping mechanism, comprising a fixed tube 1, a sliding tube 4 fixedly connected to the bottom surface of the fixed tube 1, a connecting rod 14 being provided inside the fixed tube 1 and the sliding tube 4, a float ball 19 being provided inside the sliding tube 4, the bottom surface of the connecting rod 14 being fixedly connected to the upper surface of the float ball 19, two connecting brackets 15 being fixedly connected to the outer surface of the connecting rod 14, pressure sensors 17 being fixedly connected to the two connecting brackets 15 on their opposite sides, two friction plates 10 and two friction blocks 18 being respectively provided inside the fixed tube 1, and a displacement sensor 21 being fixedly connected inside the connecting rod 14;

[0026] The two friction blocks 18 are respectively in contact with the two friction plates 10 on opposite sides. The two friction blocks 18 are also in contact with the sensing end of the pressure sensor 17. Two sets of telescopic frames 9 are fixedly connected to the inner wall of the fixed tube 1. The telescopic end of each set of telescopic frames 9 is fixedly connected to the opposite sides of the two friction plates 10. Two electric push rods 3 are provided on the outer side of the fixed tube 1. A controller 8 is provided above the fixed tube 1.

[0027] In this embodiment, the friction block 18 and the friction plate 10 are made of high friction coefficient alloy material. Their mating surfaces are precision machined and surface strengthened to form a stable friction pair structure with self-lubricating properties. Meanwhile, the displacement sensor 21 is a non-contact laser displacement sensor, while the pressure sensor 17 is a piezoresistive pressure sensor. The two sensors work together to build a multi-dimensional parameter monitoring system. The former monitors the dynamic displacement of the float 19 in real time, while the latter accurately senses the contact stress of the friction interface, providing the controller 8 with continuous and accurate feedback signals to ensure the real-time performance and stability of the dynamic adjustment of the damping force.

[0028] Specifically, the upper surface of the fixed tube 1 is movably hinged with an opening and closing door 2, and the upper surface of the opening and closing door 2 is fixedly connected with a handle 7. In this embodiment, the fixed tube 1 can be opened or closed through the opening and closing door 2, and the opening and closing door 2 can be easily opened or closed using the handle 7.

[0029] Specifically, a connecting plate 6 is fixedly connected to the upper surface of the opening and closing door 2. The upper surface of the connecting plate 6 is fixedly connected to the bottom surface of the controller 8. In this embodiment, the controller 8 can be fixed by the connecting plate 6. At the same time, the controller 8 adopts the STM32F407 series high-performance microcontroller as the core and has a built-in PID adaptive control algorithm. It can accurately calculate and output the control quantity of the electric push rod 3 according to the real-time feedback signals of the pressure sensor 17 and the displacement sensor 21, so as to realize the intelligent adjustment of the damping force.

[0030] Specifically, each of the two electric push rods 3 has a fixed bracket 13 fixedly connected to its far-away ends, and the two fixed brackets 13 have a fixed bracket 13 fixedly connected to the outer surface of the fixed tube 1 on its close-to-each side. In this embodiment, the electric push rod 3 can be fixed to the fixed tube 1 by the fixed bracket 13, so that the electric push rod 3 can extend and retract stably.

[0031] Specifically, each of the electric push rods 3 has a connecting ring 11 fixedly connected to its telescopic end. The two connecting rings 11 are fixedly connected to the sides of the two friction plates 10 that are far apart from each other. In this embodiment, the electric push rods 3 and friction plates 10 can be connected through the connecting rings 11, thereby facilitating the movement of the friction plates 10.

[0032] Specifically, a sealing ring 12 is slidably connected to the outer surface of the telescopic end of each of the electric push rods 3. The two sealing rings 12 are fixedly connected to the outer surface of the fixed tube 1 on their side that is close to each other. In this embodiment, the sealing rings 12 can seal the connection between the fixed tube 1 and the electric push rod 3, thereby improving the sealing performance inside the fixed tube 1 and the stability of the device operation.

[0033] Specifically, two sets of telescopic rods 16 are fixedly connected to the two connecting frames 15 on their opposite sides. The telescopic ends of each set of telescopic rods 16 are fixedly connected to the opposite sides of the two friction blocks 18. In this embodiment, the telescopic rods 16 can connect the friction blocks 18 to the connecting frames 15 and improve the firmness of the friction blocks 18.

[0034] Specifically, a flange 5 is fixedly connected to the bottom surface of the sliding tube 4, and a fixing hole 20 is provided on the upper surface of the flange 5 at equal intervals. In this embodiment, the flange 5 can be connected to the pipeline, and the fixing hole 20 can be used to fix the flange 5 to the pipeline.

[0035] The working principle and usage process of this utility model are as follows: In use, the sliding pipe 4 is first connected to the main pipeline via the flange 5. The fixing hole 20, along with bolts, ensures a stable installation of the device. When water hammer occurs in the main pipeline, the water pressure pushes the float 19 inside the sliding pipe 4 upwards. The float 19, through the connecting rod 14, drives the connecting frame 15 to rise synchronously. At this time, the pressure sensor 17 senses the change in contact stress between the friction block 18 and the friction plate 10 in real time, while the displacement sensor 21 monitors the upward displacement of the float 19. The two sensors synchronously transmit the data to the controller 8. Simultaneously, the controller 8's built-in PID adaptive algorithm processes the pressure and displacement signals, calculates the current water hammer intensity and its development trend, and then drives the electric push rod 3 to extend and retract. The electric push rod 3, through the connecting ring 11... The moving friction plate 10 moves, changing the degree of compression between it and the friction block 18, thereby adjusting the magnitude of the damping force. The greater the water hammer pressure, the greater the friction between the friction plate 10 and the friction block 18, and the stronger the resistance to the rise of the float 19, thus buffering the impact of the water hammer. The telescopic frame 9 provides support for the friction plate 10 to ensure the stability of the damping force during the adjustment process. When the water hammer pressure weakens, the float 19 slowly falls back under its own buoyancy and the action of the water flow. The controller 8 drives the electric push rod 3 to reset according to the sensor feedback signal, and the friction damping force decreases synchronously, so that the device returns to its initial state. When maintenance is required, the opening and closing door 2 can be opened by the handle 7 to inspect the friction pair and sensor and other components inside the fixed tube 1. At the same time, the controller 8 fixed by the connecting plate 6 opens synchronously with the opening and closing door 2, which facilitates parameter debugging and fault diagnosis.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A valve waterproof hammer damping mechanism, characterized in that: The device includes a fixed tube (1), the bottom surface of which is fixedly connected to a sliding tube (4). A connecting rod (14) is provided inside both the fixed tube (1) and the sliding tube (4). A float (19) is provided inside the sliding tube (4). The bottom surface of the connecting rod (14) is fixedly connected to the upper surface of the float (19). Two connecting frames (15) are fixedly connected to the outer surface of the connecting rod (14). Pressure sensors (17) are fixedly connected to the two connecting frames (15) on their opposite sides. Two friction plates (10) and two friction blocks (18) are respectively provided inside the fixed tube (1). A displacement sensor (21) is fixedly connected inside the connecting rod (14). The two friction blocks (18) are respectively in contact with the two friction plates (10) on opposite sides. The two friction blocks (18) are respectively in contact with the sensing end of the pressure sensor (17). The inner wall of the fixed tube (1) is fixedly connected with two sets of telescopic frames (9). The telescopic end of each set of telescopic frames (9) is respectively fixedly connected with the opposite sides of the two friction plates (10). Two electric push rods (3) are provided on the outside of the fixed tube (1). A controller (8) is provided above the fixed tube (1).

2. The valve water hammer damping mechanism according to claim 1, characterized in that: The upper surface of the fixed tube (1) is movably hinged to an opening and closing door (2), and the upper surface of the opening and closing door (2) is fixedly connected to a handle (7).

3. The valve water hammer damping mechanism according to claim 2, characterized in that: A connecting plate (6) is fixedly connected to the upper surface of the opening and closing door (2), and the upper surface of the connecting plate (6) is fixedly connected to the bottom surface of the controller (8).

4. The valve water hammer damping mechanism according to claim 1, characterized in that: The ends of the two electric push rods (3) that are far apart from each other are fixedly connected to a fixing frame (13), and the sides of the two fixing frames (13) that are close to each other are fixedly connected to the outer surface of the fixing tube (1).

5. The valve water hammer damping mechanism according to claim 1, characterized in that: Each of the electric push rods (3) has a connecting ring (11) fixedly connected to its telescopic end. The two connecting rings (11) are fixedly connected to the sides of the two friction plates (10) that are far apart from each other.

6. The valve water hammer damping mechanism according to claim 1, characterized in that: Each of the electric push rods (3) has a sealing ring (12) slidably connected to the outer surface of its telescopic end, and the two sealing rings (12) are fixedly connected to the outer surface of the fixed tube (1) on their sides that are close to each other.

7. The valve water hammer damping mechanism according to claim 1, characterized in that: Two sets of telescopic rods (16) are fixedly connected to the two connecting frames (15) on their opposite sides. The telescopic ends of each set of telescopic rods (16) are fixedly connected to the opposite sides of the two friction blocks (18).

8. A valve water hammer damping mechanism according to claim 1, characterized in that: The bottom surface of the sliding tube (4) is fixedly connected to a flange (5), and the upper surface of the flange (5) is provided with fixing holes (20) arranged at equal intervals.

Images