Marine Hydraulic Damping Water Hammer Relief Valve

Abstract

The present invention discloses a marine hydraulic damping water hammer reduction valve, which relates to the field of shipbuilding. It includes a horizontal housing. A first piston chamber is opened in the left part of the housing, and a second piston chamber is opened in the right part. A first piston is arranged on the inner side wall of the first piston chamber, and a second piston is arranged on the inner side wall of the second piston chamber. The first piston and the second piston are connected by a horizontal piston rod. A pressure spring is arranged between the piston chamber partition and the first piston. The left end and the right end of the inner side wall of the second piston chamber are communicated through a first oil passage pipe and a second oil passage pipe. A first one-way valve from right to left is arranged on the first oil passage pipe, and a first one-way valve from left to right is arranged on the second oil passage pipe. Hydraulic oil is arranged in the second piston chamber. The device of the present invention can withstand a large water hammer pressure due to the hydraulic damping principle, thereby playing a role in protecting the pipeline.

Description

Technical Field

[0001] The present invention relates to the field of shipbuilding, and more specifically, to a marine hydraulic damping water hammer reduction valve. Background Art

[0002] In shipbuilding, the pipelines play a very important role, but there is little protection for pipelines and valves. Water hammer phenomenon is likely to occur in large shipbuilding, and the damage of water hammer to ship pipelines is very serious. Existing water hammer elimination devices are basically used in fire drinking water and other aspects in land buildings, mainly divided into inflatable type and rubber type, and both forms of devices have certain defects. The inflatable type elimination device needs to regularly check whether the inflation pressure is sufficient. If the pressure drops or is insufficient, it will not be able to play a protective role, and in the harsh working conditions on ships, the occurrence of this situation is very dangerous. The rubber type is made of porous rubber with elastic inner liner. This design can bear low pressure, and the rubber aging cycle is short. After aging, the device fails and cannot play a protective role either. Therefore, both forms of devices are not suitable for ships. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a marine hydraulic damping water hammer reduction valve to solve the problems mentioned in the background art.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A marine hydraulic damping water hammer reduction valve includes a horizontal housing. A horizontally cylindrical first piston chamber with its left end communicating with the outside is provided at the left part of the housing. A horizontally cylindrical second piston chamber with its right end communicating with the outside is provided at the right part of the housing. The first piston chamber and the second piston chamber are separated by a piston chamber partition, and a piston rod through-hole is provided on the piston chamber partition. The left end of the housing is connected to an external pipeline through a butt flange, and the right end of the housing is sealed by a cover.

[0006] A vertical first piston is closely arranged on the inner side wall of the first piston chamber, and a vertical second piston is closely arranged on the inner side wall of the second piston chamber. The first piston and the second piston are connected by a piston rod horizontally passing through the piston rod through-hole.

[0007] A pressure spring is arranged between the piston chamber partition and the first piston.

[0008] A first oil inlet is provided at the right end of the inner side wall of the second piston chamber, and a first oil outlet is provided at the left end of the inner side wall of the second piston chamber. The first oil inlet and the first oil outlet are connected by a first oil passage pipe provided in the housing. A first one-way valve from the first oil inlet to the first oil outlet is provided on the first oil passage pipe.

[0009] On the left end of the inner wall of the second piston chamber, there is a second oil inlet, and on the right end of the inner wall of the second piston chamber, there is a second oil outlet. The second oil inlet and the second oil outlet are connected through a second oil passage pipe arranged in the shell. A second one-way valve from the second oil inlet to the second oil outlet is arranged on the second oil passage pipe;

[0010] Hydraulic oil is arranged in the second piston chamber.

[0011] Sealing rubber rings are arranged at the gaps between the piston rod and the through hole of the piston rod.

[0012] On the left end of the first piston, there is also a spring gland with an opening in the middle.

[0013] The first oil inlet is arranged at the lower right end of the second piston chamber.

[0014] The first oil outlet is arranged at the lower left end of the second piston chamber.

[0015] The second oil inlet is arranged at the upper left end of the second piston chamber.

[0016] The second oil outlet is arranged at the upper right end of the second piston chamber.

[0017] A first throttle valve and a first lift valve are also arranged on the first oil passage pipe.

[0018] A second throttle valve and a second lift valve are also arranged on the second oil passage pipe.

[0019] The advantages of the present invention compared with the prior art are that the equipment of the present invention has a large load-bearing range due to the adoption of the hydraulic damping principle; the reaction action is rapid and reliable, and the equipment has good use effect and reliability for the situation of low-frequency and large amplitude; it can adapt to various working environments and has high reliability in high-temperature, high-humidity and high-salinity environments; it has the ability to adjust the sensitivity of the lift valve according to needs, thereby improving the reaction speed of the equipment; it adopts an adjustable pressure design, and the equipment can adjust the relative value of the pressure spring relative to the pipeline pressure by adjusting the pressure spring gland, which can meet the use of different pipelines with different pressures. Brief Description of the Drawings

[0020] Figure 1 is a side sectional view of the present invention;

[0021] Figure 2 is Figure 1 an enlarged view of the first lift valve of the first throttle valve in the A circle of

[0022] In the figure: 1, docking flange; 2, shell; 3, sealing rubber ring; 4, piston rod; 5, second one-way valve; 6, second lift valve; 7, second throttle valve; 8, gland; 9, spring gland; 10, first piston; 11, pressure spring. Detailed Embodiment

[0023] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0024] As Figures 1 to 2 shown, a marine hydraulic damping water hammer reducing valve of the present invention includes a horizontal housing 2. A horizontal cylindrical first piston chamber with its left end communicating with the outside is provided at the left part of the housing 2; a horizontal cylindrical second piston chamber with its right end communicating with the outside is provided at the right part of the housing 2; the first piston chamber and the second piston chamber are separated by a piston chamber partition, and a piston rod through port is provided on the piston chamber partition; the left end of the housing 2 is connected to an external pipeline through a docking flange 1, and the right end of the housing 2 is sealed by a cover 8;

[0025] A vertical first piston 10 is closely arranged on the inner side wall of the first piston chamber, and a vertical second piston is closely arranged on the inner side wall of the second piston chamber. The first piston 10 and the second piston are connected by a piston rod 4 horizontally passing through the piston rod through port;

[0026] A pressure spring 11 is arranged between the piston chamber partition and the first piston 10;

[0027] A first oil inlet is provided at the right lower end of the inner side wall of the second piston chamber, and a first oil outlet is provided at the left lower end of the inner side wall of the second piston chamber. The first oil inlet and the first oil outlet are communicated through a first oil passage pipeline provided in the housing 2, and a first one-way valve from the first oil inlet to the first oil outlet is provided on the first oil passage pipeline;

[0028] A second oil inlet is provided at the left upper end of the inner side wall of the second piston chamber, and a second oil outlet is provided at the right upper end of the inner side wall of the second piston chamber. The second oil inlet and the second oil outlet are communicated through a second oil passage pipeline provided in the housing 2, and a second one-way valve 5 from the second oil inlet to the second oil outlet is provided on the second oil passage pipeline;

[0029] Hydraulic oil is provided in the second piston chamber.

[0030] A sealing rubber ring 3 is provided at the gap between the piston rod 4 and the piston rod through port.

[0031] A spring gland 9 with an opening in the middle is further provided at the left end of the first piston 10.

[0032] The first oil inlet is provided at the right lower end of the second piston chamber.

[0033] The first oil outlet is provided at the left lower end of the second piston chamber.

[0034] The second oil inlet is provided at the left upper end of the second piston chamber.

[0035] The second oil outlet is provided at the right upper end of the second piston chamber.

[0036] A first throttle valve and a first lift valve are further provided on the first oil passage pipeline.

[0037] A second oil pipeline is also provided with a second throttle valve 7 and a second lifting valve 6.

[0038] Among them, the spring gland 9 can adjust the position of the first piston 10 in the first piston chamber. The position of the spring gland 9 can be limited and fixed by means of a buckle or a fastener or a limit pin, etc., so as to adjust the pressing degree of the pressure spring 11, so as to adjust to meet the use of different pressures in different pipelines.

[0039] The throttle valve (including the first throttle valve and the second throttle valve 7) is a cylindrical structure. The lifting valve (including the first lifting valve and the second lifting valve 6) includes a lifting valve cylinder body with an open rear end. The front end of the lifting valve cylinder body leans against the cylindrical structure of the throttle valve; a spring limit plate is arranged at the rear end of the lifting valve cylinder body, and a lifting valve spring surrounding the lifting valve cylinder body is arranged between the spring limit plate and the throttle valve. Openings are provided at the front end and both sides of the lifting valve cylinder body; when hydraulic oil enters the lifting valve cylinder body, if the flow rate of the hydraulic oil is slow and the acting force on the lifting valve cylinder body is small, then under the action of the elastic force of the lifting valve spring, the lifting valve cylinder body will leave the throttle valve, so that the three openings in the lifting valve cylinder body can all enter the throttle valve through the lifting valve cylinder body and flow to the subsequent pipeline; if the flow rate of the hydraulic oil is fast, the lifting valve cylinder body is pushed by the hydraulic oil to the throttle valve, so as to cut off the connection between the openings on both sides of the lifting valve cylinder body and the subsequent pipeline, and the hydraulic oil can only enter the subsequent pipeline through the middle opening, so as to play a role in slowing down the flow rate.

[0040] When the marine hydraulic damping water hammer reduction valve of the present invention is in use, it is subjected to a water flow shock wave from the pipeline. The shock wave acts on the first piston 10 and pushes the first piston 10 and the piston rod 4 to move inward together. At this time, the pressure spring 11 plays an initial buffering role. Next, the second piston compresses the hydraulic oil in the right chamber of the second piston to reach the first one-way valve through the first oil inlet, and reaches the first lifting valve and the first throttle valve through the first one-way valve. Due to the sudden change in the hydraulic oil flow rate, the first lifting valve overcomes the thrust of the lifting valve spring under the action of the hydraulic oil, and the throttle valve is activated. The hydraulic oil can only flow out from the middle small hole and flow into the left chamber of the second piston through the first oil outlet. In the above process, both the pressure spring 11 and the hydraulic oil can play a role in slowing down the movement speed of the piston and the piston rod 4. Among them, the increase in pressure in the right chamber of the second piston generates resistance, which can also offset the acting force of the water flow shock wave.

[0041] It should be noted that the above orientations are only for the illustration in the figure, but the actual structure has been determined and should not be limited by the choice of orientation.

[0042] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A marine hydraulic damping water hammer reduction valve, characterized in that, It includes a horizontal housing (2). A horizontally cylindrical first piston chamber with its left end communicating with the outside is provided at the left part of the housing (2). A horizontally cylindrical second piston chamber with its right end communicating with the outside is provided at the right part of the housing (2). The first piston chamber and the second piston chamber are separated by a piston chamber partition, and a piston rod through-hole is provided on the piston chamber partition. The left end of the housing (2) is connected to an external pipeline through a docking flange (1), and the right end of the housing (2) is sealed by a cover (8). A vertical first piston (10) is closely arranged on the inner side wall of the first piston chamber, and a vertical second piston is closely arranged on the inner side wall of the second piston chamber. The first piston (10) and the second piston are connected by a piston rod (4) horizontally passing through the piston rod through-hole. A pressure spring (11) is arranged between the piston chamber partition and the first piston (10). A first oil inlet is provided at the right end of the inner side wall of the second piston chamber, and a first oil outlet is provided at the left end of the inner side wall of the second piston chamber. The first oil inlet and the first oil outlet are communicated through a first oil pipeline provided in the housing (2). A first one-way valve from the first oil inlet to the first oil outlet is provided on the first oil pipeline. A second oil inlet is provided at the left end of the inner side wall of the second piston chamber, and a second oil outlet is provided at the right end of the inner side wall of the second piston chamber. The second oil inlet and the second oil outlet are communicated through a second oil pipeline provided in the housing (2). A second one-way valve (5) from the second oil inlet to the second oil outlet is provided on the second oil pipeline. Hydraulic oil is provided in the second piston chamber. A spring gland (9) can adjust the position of the first piston (10) in the first piston chamber. The position of the spring gland (9) can be limited and fixed by means of a buckle or a fastener or a limit pin, so as to adjust the compression degree of the pressure spring (11), so as to adjust to meet the use of different pressures in different pipelines.

2. The marine hydraulic damping water hammer reduction valve according to claim 1, characterized in that A sealing rubber ring (3) is provided at the gap between the piston rod (4) and the piston rod through-hole.

3. The marine hydraulic damping water hammer reduction valve according to claim 1, characterized in that, A spring gland (9) with an opening in the middle is further provided at the left end of the first piston (10).

4. The marine hydraulic damping water hammer reduction valve according to claim 1, characterized in that, The first oil inlet is provided at the lower right end of the second piston chamber.

5. The marine hydraulic damping water hammer reduction valve according to claim 4, wherein, The first oil outlet is provided at the lower left end of the second piston chamber.

6. The marine hydraulic damping water hammer reduction valve according to claim 1, wherein, The second oil inlet is provided at the upper left end of the second piston chamber.

7. The marine hydraulic damping water hammer reduction valve according to claim 6, characterized in that, The second oil outlet is provided at the upper right end of the second piston chamber.

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