A counterweight type water hammer damper structure for an intake and exhaust valve

Abstract

The utility model relates to a counterweight type waterproof hammer structure for inlet and exhaust valve belongs to composite inlet and exhaust valve technical field, including cylinder, pivot and weight, pivot horizontal penetration and rotation connection in cylinder cylinder wall, the pivot axle wall is fixed with first flow control plate, the first flow control plate surface is opened with first air hole, the inside of cylinder is provided with the limit rod, when the first flow control plate and limit rod are in the abutting state, the first flow control plate is in the state of inclination, the weight is arranged in the one end of pivot length direction, the inclination direction of weight is consistent with the inclination direction of flow control plate. The utility model relates to a counterweight type waterproof hammer structure for inlet and exhaust valve, simple structure, convenient to dismouting, can change the rotation state of first flow control plate and second flow control plate according to the pressure in water delivery pipeline, thereby change airflow flow area, effectively restrain the generation of healing water hammer.

Description

Technical Field

[0001] This utility model relates to the field of composite intake and exhaust valve technology, and in particular to a counterweight waterproof hammer structure for intake and exhaust valves. Background Technology

[0002] In long-distance water transmission pipeline systems, the formation of water hammer is closely related to the valve opening and closing dynamics. Especially in the early stage of pipeline negative pressure formation, the instantaneous full-opening air intake mode of traditional air intake and exhaust valves is prone to triggering gas inertial impact. The coupling effect of this high-speed airflow and liquid column will aggravate the pressure oscillation amplitude and form the water hammer effect.

[0003] Traditional composite air intake and exhaust valves in pipeline systems are prone to instability and oscillation of the float ball inside when faced with transient pressure fluctuations due to high-speed airflow. This pressure surge can cause structural damage to pipelines, valves, and other equipment. Therefore, the inventors have developed a counterweight-type water hammer prevention structure, which is installed at the inlet and outlet of the composite air intake and exhaust valve to achieve a smooth transition of pressure fluctuations, thereby effectively suppressing the generation of water hammer. Utility Model Content

[0004] The purpose of this invention is to provide a counterweight-type water hammer prevention structure for intake and exhaust valves, which aims to adjust the exhaust cross-sectional area according to working conditions to achieve a smooth transition of pressure fluctuations, thereby suppressing the generation of water hammer.

[0005] This utility model provides a counterweight-type waterproof hammer structure for an intake and exhaust valve, which adopts the following technical solution:

[0006] A counterweight-type waterproof hammer structure for intake and exhaust valves includes,

[0007] cylindrical body;

[0008] A rotating shaft is horizontally connected to the cylinder wall and rotates through it. A first flow limiting plate is fixed to the shaft wall. A first vent hole is opened on the surface of the first flow limiting plate. A limit rod is provided inside the cylinder. When the first flow limiting plate and the limit rod are in contact, the first flow limiting plate is in an inclined state.

[0009] A counterweight is positioned at one end along the length of the rotating shaft, with the end of the counterweight away from the rotating shaft extending in the same direction as the end of the first flow-limiting plate away from the rotating shaft.

[0010] Preferably, the rotating shaft is located at the center of the cylinder, and the shaft is rotatably connected to a second flow-limiting plate. The surface of the second flow-limiting plate is provided with a second vent hole, and the second flow-limiting plate is provided with a support rod. The end of the support rod away from the second flow-limiting plate can abut against a limiting rod. When the support rod abuts against the limiting rod, the second flow-limiting plate is in a slanted state.

[0011] Preferably, the top of the cylinder is provided with a limiting edge, and when the first flow limiting plate and the second flow limiting plate are in a horizontal state, the first flow limiting plate and the second flow limiting plate abut against the bottom surface of the limiting edge.

[0012] Preferably, the counterweight includes a rotating rod and a counterweight, the rotating rod being detachably mounted on a rotating shaft, and the counterweight being slidably mounted on the rotating rod.

[0013] Preferably, the rotating rod has an installation hole for mounting the rotating shaft, and the rotating rod is threadedly connected to a first positioning bolt, the bottom end of which can abut against the shaft wall of the rotating shaft.

[0014] Preferably, the counterweight is threadedly connected to a second positioning bolt, the bottom end of which can abut against the wall of the rotating rod.

[0015] Preferably, a base is provided at the bottom end of the cylinder.

[0016] In summary, this utility model has the following beneficial technical effects:

[0017] 1. The structure in this application is used for the inlet and outlet ports of the air inlet and outlet valve. The cylinder is equipped with a rotating shaft and a first flow limiting plate. The first flow limiting plate is fixedly installed on the shaft wall, that is, the first flow limiting plate rotates simultaneously with the rotating shaft. A limiting rod is provided inside the cylinder to tilt the first flow limiting plate. A counterweight is provided at one end of the rotating shaft outside the cylinder. Under the action of the counterweight, the first flow limiting plate tilts and abuts against the limiting rod. When the water flow in the water supply pipeline generates an impact pressure wave, the first flow limiting plate overcomes the gravity of the counterweight under the action of the impact pressure wave and flips to a horizontal state. At this time, air only flows through the first vent hole, thereby maintaining the stable change of the internal pressure of the air inlet and outlet valve. After the pressure inside the water supply pipeline decreases, the first flow limiting plate returns to its initial state under the action of its own gravity and the gravity of the counterweight, that is, the first flow limiting plate tilts and abuts against the limiting rod.

[0018] 2. The structure in this application also includes a second flow limiting plate. When the water flow in the water pipeline generates an impact pressure wave, the second flow limiting plate immediately flips to a horizontal state under the pressure of the air inlet and outlet valve, while the first flow limiting plate slowly flips to a horizontal state, thereby ensuring the stable output of the internal pressure of the air inlet and outlet valve.

[0019] 3. The counterweight in this application includes a rotating rod and a counterweight. The counterweight is slidably mounted on the rotating rod, so that the position of the counterweight on the rotating rod can be set in advance according to the working conditions to change the resistance encountered by the first flow restrictor during the flipping process. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of a counterweight-type waterproof hammer structure for an intake and exhaust valve provided by this utility model;

[0021] Figure 2 This is a schematic diagram of the first working state of the counterweight-type waterproof hammer structure.

[0022] Figure 3 This is a cross-sectional structural diagram of a counterweight-type waterproof hammer structure.

[0023] Figure 4 This is a schematic diagram of the second working state of the counterweight-type waterproof hammer structure;

[0024] Figure 5 This is a schematic diagram of the third working state of the counterweight-type waterproof hammer structure.

[0025] Explanation of reference numerals in the attached drawings: 1. Cylinder body; 11. Limiting rod; 12. Base; 13. Limiting edge; 2. Rotating shaft; 21. First flow limiting plate; 211. First vent hole; 22. Second flow limiting plate; 221. Second vent hole; 222. Support rod; 3. Counterweight; 31. Rotating rod; 311. Mounting hole; 312. First positioning bolt; 32. Counterweight; 321. Second positioning bolt; 4. Inlet and outlet valves. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-5 The present invention will be described in further detail below.

[0027] This utility model provides a counterweight-type waterproof hammer structure for intake and exhaust valves. (Refer to...) Figure 1 and Figure 2 A counterweight-type waterproof hammer structure for an intake / exhaust valve includes a cylinder 1, a rotating shaft 2, and a counterweight 3. A base 12 for mounting the intake / exhaust valve 4 is fixedly connected to the bottom end of the cylinder 1. The rotating shaft 2 is horizontally penetrating and rotatably connected to the cylinder wall of the cylinder 1. A first flow-limiting plate 21 is fixedly connected to the shaft wall of the rotating shaft 2. A first vent hole 211 is opened on the surface of the first flow-limiting plate 21. A horizontal limiting rod 11 is fixedly connected inside the cylinder 1. When the first flow-limiting plate 21 abuts against the limiting rod 11, the first flow-limiting plate 21 is in an inclined state. That is, when a pressure shock wave is generated inside the intake / exhaust valve 4, the first flow-limiting plate 21 can maintain contact with the shock wave, so that the first flow-limiting plate 21 can flip over. The counterweight 3 is detachably installed on one end of the rotating shaft 2 located outside the cylinder 1, and the end of the counterweight 3 away from the rotating shaft 2 extends in the same direction as the end of the first flow limiting plate 21 away from the rotating shaft 2. That is, during the flipping process of the first flow limiting plate 21, it is necessary to overcome the gravity of the counterweight 3, thereby slowly reducing the air flow area at the top of the cylinder 1 and ensuring stable pressure output.

[0028] Reference Figure 2 and Figure 3The rotating shaft 2 rotates at the center position of the cylinder 1 in the horizontal direction. The shaft of the rotating shaft 2 is also rotatably connected to a second flow limiting plate 22. The end of the second flow limiting plate 22 is sleeved on the shaft of the rotating shaft 2. A second vent hole 221 is opened on the surface of the second flow limiting plate 22. A support rod 222 is connected to the bottom surface of the second flow limiting plate 22. The end of the support rod 222 away from the second flow limiting plate 22 can abut against the limiting rod 11. When the support rod 222 abuts against the limiting rod 11, the second flow limiting plate 22 is in a slanted state. When a pressure shock wave is generated inside the inlet and outlet valve 4, the second flow limiting plate 22 can maintain the contact surface with the shock wave so that the second flow limiting plate 22 can be flipped.

[0029] Reference Figure 4 and Figure 5 When the water flow in the water supply pipeline generates impact pressure, the second flow limiting plate 22 immediately flips to a horizontal state under the pressure of the air inlet and outlet valve 4. When the impact pressure of the water flow in the water supply pipeline gradually increases, the first flow limiting plate 21 slowly flips to a horizontal state, thereby ensuring the stable output of the internal pressure of the air inlet and outlet valve 4.

[0030] Reference Figure 1 and Figure 5 In this embodiment, the cylinder 1 is cylindrical, and both the first flow limiting plate 21 and the second flow limiting plate 22 are semi-circular. The first flow limiting plate 21 and the second flow limiting plate 22 are located on both sides of the central axis of the rotating shaft 2. A limiting edge 13 is provided at the top of the cylinder 1. When the first flow limiting plate 21 and the second flow limiting plate 22 are in a horizontal state, the first flow limiting plate 21 and the second flow limiting plate 22 abut against the bottom surface of the limiting edge 13.

[0031] Reference Figure 1 The counterweight 3 includes a rotating rod 31 and a counterweight 32. The rotating rod 31 is detachably mounted on the rotating shaft 2, and the counterweight 32 is slidably mounted on the rotating rod 31. This allows the position of the counterweight 32 on the rotating rod 31 to be pre-set according to the working conditions, thereby changing the resistance from the counterweight 3 experienced by the first flow-limiting plate 21 during its rotation. The rotating rod 31 has a mounting hole 311 for mounting the rotating shaft 2. A first positioning bolt 312 is threaded onto the rotating rod 31, and the bottom end of the first positioning bolt 312 abuts against the shaft wall of the rotating shaft 2, making it difficult for the rotating rod 31 to separate from the rotating shaft 2 and facilitating disassembly and assembly. A second positioning bolt 321 is threaded onto the counterweight 32, and the bottom end of the second positioning bolt 321 abuts against the rod wall of the rotating rod 31, thus positioning the counterweight 32.

[0032] The implementation principle of the counterweight-type waterproof hammer structure for intake and exhaust valves of this utility model is as follows:

[0033] In the initial state, the first flow limiting plate 21 and the second flow limiting plate 22 are tilted under the action of the limiting rod 11, and the tilting directions of the first flow limiting plate 21 and the second flow limiting plate 22 are opposite. When the water flow in the water supply pipeline generates an impact pressure wave, the second flow limiting plate 22 immediately flips to a horizontal state under the pressure of the air inlet and outlet valve 4. At this time, air flows through the second vent 221, the first vent 211, and the gap between the first flow limiting plate 21 and the cylinder 1. If the impact pressure wave output inside the air inlet and outlet valve 4 gradually increases, the first flow limiting plate 21 overcomes the gravity of the counterweight 3 and flips to a horizontal state under the action of the impact pressure wave. At this time, air only flows through the first vent 211 and the second vent 221, thereby maintaining the stable change of the internal pressure of the air inlet and outlet valve 4. After the pressure inside the water supply pipeline decreases, the first flow limiting plate 21 returns to its initial state under the gravity of itself and the counterweight 3, that is, the first flow limiting plate 21 and the second flow limiting plate 22 return to the tilted state.

[0034] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A counterweight-type waterproof hammer structure for an intake / exhaust valve, characterized in that, include, Cylinder (1); A rotating shaft (2) is horizontally connected to the wall of the cylinder (1) and rotates through it. A first flow limiting plate (21) is fixed on the shaft wall of the rotating shaft (2). A first vent hole (211) is opened on the surface of the first flow limiting plate (21). A limit rod (11) is provided inside the cylinder (1). When the first flow limiting plate (21) and the limit rod (11) are in contact, the first flow limiting plate (21) is in an inclined state. A weight (3) is disposed on the rotating shaft (2), and the end of the weight (3) away from the rotating shaft (2) extends in the same direction as the end of the first flow limiting plate (21) away from the rotating shaft (2).

2. The counterweight-type waterproof hammer structure for an intake / exhaust valve according to claim 1, characterized in that, The rotating shaft (2) is located at the center of the cylinder (1). The shaft of the rotating shaft (2) is rotatably connected to a second flow limiting plate (22). A second vent hole (221) is opened on the surface of the second flow limiting plate (22). A support rod (222) is provided on the second flow limiting plate (22). One end of the support rod (222) away from the second flow limiting plate (22) can abut against the limiting rod (11). When the support rod (222) abuts against the limiting rod (11), the second flow limiting plate (22) is in a slanted state.

3. A counterweight-type waterproof hammer structure for an intake / exhaust valve according to claim 2, characterized in that, The top of the cylinder (1) is provided with a limiting edge (13). When the first flow limiting plate (21) and the second flow limiting plate (22) are in a horizontal state, the first flow limiting plate (21) and the second flow limiting plate (22) abut against the bottom surface of the limiting edge (13).

4. A counterweight-type waterproof hammer structure for an intake / exhaust valve according to claim 1, characterized in that, The hammer (3) includes a rotating rod (31) and a counterweight (32). The rotating rod (31) is detachably mounted on the rotating shaft (2), and the counterweight (32) is slidably mounted on the rotating rod (31).

5. A counterweight-type waterproof hammer structure for an intake and exhaust valve according to claim 4, characterized in that, The rotating rod (31) has an installation hole (311) for mounting the rotating shaft (2). The rotating rod (31) is threaded with a first positioning bolt (312), and the bottom end of the first positioning bolt (312) can abut against the shaft wall of the rotating shaft (2).

6. A counterweight-type waterproof hammer structure for an intake / exhaust valve according to claim 4, characterized in that, The counterweight (32) is threadedly connected to a second positioning bolt (321), the bottom end of which can abut against the wall of the rotating rod (31).

7. A counterweight-type waterproof hammer structure for an intake and exhaust valve according to claim 1, characterized in that, The bottom end of the cylinder (1) is provided with a base (12).

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