CN101655178A - Water hammer eliminator - Google Patents

Abstract

The invention discloses a water hammer eliminator, which comprises a main pipe, and a cylinder mechanism communicated with the inside of the connecting pipe for buffering fluid pulse pressure is provided on the pipe wall of the main pipe; A body pipe, a piston part is arranged in the cylinder body pipe, and a plug is arranged at the other end of the cylinder body pipe to form a normal-pressure airtight space between the end face and one end face of the piston part. Through the action of air pressure, the fluid pulse pressure is well relieved, thereby protecting the water pipe and prolonging the service life of the water pipe.

Description

A water hammer eliminator

technical field

The invention relates to the field of pipe fitting manufacturing, in particular to a water hammer eliminator capable of alleviating water hammer or water hammer phenomena in pipelines caused by pressure pulse changes.

Background technique

In water supply systems and liquid flow test devices, it is very frequent to change the fluid path, fluid pressure and fluid flow in the pipeline. Due to the incompressibility of the liquid, the liquid in the pipeline will expand like a solid solid cylinder, causing water hammer or water hammer, especially when the water flow is cut off or adjusted rapidly, this phenomenon will cause the valve to pull Injury, pipeline deformation, instrument damage and other problems, in serious cases, the pipeline will rupture, resulting in the paralysis of the entire drainage and water supply system.

The original method used by technicians to eliminate water hammer is to open the drain outlet after the pressure in the water pipe exceeds a certain value to allow part of the water to flow out, but it also wastes a lot of water resources while alleviating the impact of the water flow. In the prior art, there are also water hammer eliminators using airbags or elastic hose structures. This kind of water hammer eliminator uses the shrinkage or expansion of airbags and elastic hoses to eliminate the impact of water flow, although it also solves the water hammer phenomenon. , but under the impact of a large water flow, the air bag and the elastic hose are easily broken and thus fail, and the service life is short.

Contents of the invention

The problem to be solved by the present invention is to provide a water hammer eliminator with simple structure and long service life, which can effectively alleviate or eliminate the impact caused by water hammer and water hammer, and has reasonable structure design and reliable operation.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a water hammer eliminator, which is characterized in that it includes a main pipe, and a cylinder mechanism communicating with the inside of the main pipe and used to buffer fluid pulse pressure is provided on the pipe wall of the main pipe.

Further, the cylinder mechanism includes a cylinder tube with one end sealingly connected to the pipe wall of the main pipe, a piston part is arranged in the cylinder tube, and a plug is arranged at the other end of the cylinder tube to make the gap between the end surface and one end surface of the piston part Form an airtight space at atmospheric pressure. After a fluid impact, the compressed gas in the atmospheric airtight space can push the piston back to its original position.

Preferably, the end of the cylinder pipe is sleeved with a connector, the connector is provided with a socket outer thread, the pipe wall of the main pipe is provided with an outwardly protruding connecting portion, and the connecting portion is provided with a socket mating with the socket outer thread. The inner thread of the socket is threaded, and the cylinder tube and the main pipe are screwed through the thread.

Preferably, the pipe end of the cylinder body is connected to the pipe wall of the main pipe through a flange, and a gasket is provided at the joint.

Preferably, a sealing ring is embedded on the outer circumference of the piston to increase the sealing performance and improve the cushioning effect.

Preferably, both ends of the main pipe are provided with screw structures for connecting water pipes.

The advantages of the present invention: the present invention has reasonable structural design and reliable operation; the invention is installed on the water pipe, and when there is a large pulse pressure in the pipe, the cylinder mechanism moves to the direction of the pressure gas under the action of water pressure, thereby providing a good The buffer can effectively alleviate or eliminate the impact of water hammer and water hammer on the wall of the water pipe, thereby protecting the water pipe and prolonging the service life of the water pipe.

Description of drawings

Below in conjunction with accompanying drawing, the present invention will be further described:

Fig. 1 is a schematic diagram of the connection structure between the cylinder mechanism and the main pipe in Embodiment 1 of the present invention;

Fig. 2 is the structural representation of cylinder mechanism of the present invention;

Fig. 3 is a schematic diagram of the connection structure between the cylinder mechanism and the main pipe according to the second embodiment of the present invention.

Detailed ways

Embodiment one

As shown in Fig. 1 and Fig. 2, a water hammer eliminator includes a main pipe 1. Both ends of the main pipe 1 are provided with threaded structures 10 for connecting water pipes. A cylinder mechanism commonly used for buffering fluid pulse pressure. The cylinder mechanism includes a cylinder tube 2 that is sealingly connected to the tube wall of the main pipe 1 at one end. A piston 21 is arranged inside the cylinder tube 2, and a sealing ring is embedded on the outer periphery of the piston 21. 22. Increase the sealing performance and improve the buffering effect; a plug 23 is provided at the other end of the cylinder tube 2 to form a normal-pressure airtight space 4 between the end face and one end face of the piston member 21 . The end of the cylinder tube 2 is sleeved with a connector 3, the connector 3 is provided with a socket external thread 31, and the pipe wall of the main pipe 1 is provided with an outwardly protruding connecting portion 11, and the connecting portion 11 is provided with a socket external thread. 31 fits the inner wire thread 12 of the socket, and the cylinder pipe 2 and the main pipe 1 are screwed together.

Embodiment two

As shown in Figure 3, in the second embodiment, the structure of the main pipe 1 and the cylinder mechanism are the same as those of the first embodiment. , A gasket 51 is provided at the junction of the two flanges 5 to improve the sealing performance.

When the present invention is installed in the water supply and drainage system, when there is a relatively large fluid pulse pressure in the water pipe, the fluid pulse pressure will push the piston member 21 to move towards the plug 23 so as to reduce the volume of the airtight space 4 under normal pressure. The air pressure in the enclosed space 4 increases with the decrease of the volume of the space and reacts on the piston member 21, so that the fluid pulse pressure is well buffered or even eliminated; when there is no fluid pulse pressure, the normal pressure airtight space 4 The compressed gas reversely pushes the piston member 21 to the original position, waiting for the next water hammer.

The above-mentioned embodiments are only preferred structures of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the field of the present invention are covered by the protection scope of the present invention. Inside.

Claims (6)

1. A water hammer eliminator, characterized in that it includes a main pipe (1), and a cylinder mechanism communicating with the inside of the main pipe (1) and used to buffer fluid pulse pressure is provided on the pipe wall of the main pipe (1). 2. A water hammer eliminator according to claim 1, characterized in that: the cylinder mechanism includes a cylinder tube (2) with one end sealingly connected to the tube wall of the main pipe (1), and the cylinder tube (2) ) is provided with a piston part (21), and a plug (23) is set at the other end of the cylinder pipe (2) to form a normal pressure airtight space (4) between the end face and an end face of the piston part (21). 3. A water hammer eliminator according to claim 2, characterized in that: the end of the cylinder pipe (2) is sleeved with a connector (3), and the connector (3) is provided with a socket outer thread (31 ), the pipe wall of the main pipe (1) is provided with an outwardly protruding connecting portion (11), and the connecting portion (11) is provided with a socket internal thread (12) matching with the socket external thread (31), the cylinder The body pipe (2) is screwed to the main pipe (1) through threads. 4. A water hammer eliminator according to claim 2, characterized in that: the end of the cylinder pipe (2) is connected to the pipe wall of the main pipe (1) through a flange (5), and the joint is provided with a seal Pad (51). 5. A water hammer arrester according to claim 2, characterized in that a sealing ring (22) is embedded on the outer periphery of the piston member (21). 6. A water hammer arrester according to claim 1, characterized in that: both ends of the main pipe (1) are provided with threaded structures (10) for connecting water pipes.

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