Water hammer effect linkage valve

Abstract

The water hammer effect linkage valve comprises a pipe body, a hydraulic hose, a buffering assembly, a valve deck, a driving spring, a buffering pipe, a locking mechanism, a valve plate and a valve rod, the buffering pipe is arranged at one end of the pipe body in the radial direction, the valve deck is arranged at the other end of the pipe body in the radial direction, and the buffering assembly used for absorbing water flow pressure is arranged in the buffering pipe. A valve plate used for blocking the two ends of the pipe body is arranged in the valve deck, a locking mechanism is arranged on the outer end face of the top of the valve deck, a valve rod is arranged in the center of the valve plate end, the valve rod penetrates through the top of the valve deck and is fixed in an unblocked state through the locking mechanism, and a driving spring arranged outside the valve rod in a sleeving mode is arranged between the valve plate and the valve deck. The driving spring forces the valve plate to block the two ends of the pipe body, the locking mechanism is communicated with the buffer pipe through the hydraulic hose, when the pressure in the buffer pipe is suddenly increased, the hydraulic hose transmits the pressure of the buffer pipe to the locking mechanism to unlock the valve rod, the valve plate blocks the two ends of the pipe body, and therefore water flow is prevented from impacting the water pump to cause damage.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy transportation, in particular to a water hammer effect linkage valve. Background Art

[0002] The water hammer effect, also known as water shock, is caused by a sudden change in flow rate during the transportation of water or other liquids due to the sudden closing of valves, sudden stopping of water pumps, sudden opening and closing of guide vanes, etc. Due to the smooth pipe wall, the subsequent water flow quickly reaches its maximum hydraulic force under the action of inertia and produces a destructive effect. At present, water hammer eliminators are installed in pipelines to protect water pipes and water pumps, but existing water hammer eliminators can only eliminate smaller impact forces. When the water flow pressure exceeds the water hammer eliminator, the force generated by the sudden stop of water flow will still act on the water pump, causing damage to the water pump. Therefore, a water hammer effect linkage valve is designed to solve the above problem. Utility Model Content

[0003] In view of the shortcomings of existing water conservancy transportation technology, the purpose of the utility model is to provide a water hammer effect linkage valve, which has the advantages of eliminating the pressure generated by water hammer and automatically blocking the pipeline to prevent damage to the water pump when the pressure increases suddenly.

[0004] In order to achieve the above-mentioned purpose, a technical solution adopted by the utility model is: a water hammer effect linkage valve, including a pipe body, a hydraulic hose, a buffer assembly, a valve cover, a driving spring, a buffer tube, a locking mechanism, a valve plate and a valve stem, a buffer tube is radially arranged at one end of the pipe body, a valve cover is radially arranged at the other end of the pipe body, a buffer assembly for absorbing water flow pressure is arranged in the buffer tube, a valve plate for blocking both ends of the pipe body is arranged in the valve cover, a locking mechanism is arranged on the outer end surface of the top of the valve cover, a valve stem is arranged at the center of the valve plate end, the valve stem passes through the top of the valve cover and is fixed in an unblocked state by the locking mechanism, a driving spring sleeved outside the valve stem is arranged between the valve plate and the valve cover, the driving spring forces the valve plate to block both ends of the pipe body, the locking mechanism is connected with the buffer tube through the hydraulic hose, and when the pressure in the buffer tube increases suddenly, the hydraulic hose transmits the pressure to the locking mechanism to unlock the valve stem for blocking;

[0005] Preferably, the buffer assembly includes a buffer piston, a hydraulic piston and a pressure spring, the hydraulic piston is arranged in the middle of the buffer tube, the hydraulic piston divides the inside of the buffer tube into a top hydraulic cavity and a bottom buffer cavity, the bottom of the buffer cavity is provided with a buffer piston that can be axially slidably connected, the bottom of the buffer piston is communicated with the inside of the tube body, the pressure spring is arranged in the hydraulic cavity at the top of the hydraulic piston, the pressure spring forces the hydraulic piston to be in the middle of the buffer tube, and the hydraulic cavity is connected to one end of a hydraulic hose;

[0006] Further preferably, the hydraulic cavity contains incompressible oil, the buffer cavity contains compressible gas, and the gas pressure in the buffer cavity is the same as the liquid pressure in the pipe body in a normal flow state;

[0007] Preferably, the top of the valve stem has a locking groove, and a reset lever is radially extended from the top of the valve stem; the valve plate can be reset by moving the lever upwards;

[0008] Preferably, the locking mechanism comprises a locking pin, a locking piston, a locking spring and a U-shaped positioning block, the open end of the U-shaped positioning block is fixedly connected to the top of the buffer tube, the U-shaped positioning block radially has a plurality of cavities for installing the locking piston, one end of the locking piston is fixedly connected to a locking pin, the other end of the locking piston is provided with a locking spring, the locking spring forces the locking pin to be inserted into the locking pin at the top of the valve stem, the U-shaped positioning block also has a flow channel connected to a hydraulic hose, the flow channel is connected to one side of the locking piston, when there is pressure in the flow channel, the locking piston moves to one side to remove the locking pin from the locking groove at the top of the valve stem;

[0009] The beneficial effects of the utility model are: 1. When a small impact force appears in the pipeline, the water pressure in the pipe body pushes the buffer piston to move, so that the gas inside the buffer cavity is compressed, thereby absorbing the impact force to prevent damage to the pipeline and the water pump; 2. When the pressure in the pipeline increases suddenly, the water pressure in the pipe body pushes the hydraulic piston to move, so that the hydraulic piston transports the oil to the flow channel of the U-shaped positioning block through the hydraulic hose, and drives the locking piston to move to one side to remove the locking pin from the locking groove at the top of the valve stem. At this time, the valve stem and the valve plate are not restricted, and the valve plate blocks the two ends of the pipe body by driving the spring, thereby preventing the water flow from continuing to impact the water pump and causing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a cross-sectional structural view of the utility model in an unblocked state;

[0011] Figure 2 This is a cross-sectional structural view of the utility model in the over-limit pressure blocking state;

[0012] Figure 3 For this utility model Figure 1 A partial magnified view of area I in the middle. DETAILED DESCRIPTION

[0013] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0014] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0015] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "provided with", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] See also Figures 1 to 3 , the utility model embodiment includes:

[0017] A water hammer effect linkage valve, comprising a pipe body 1, a hydraulic hose 2, a buffer assembly 3, a valve cover 4, a driving spring 5, a buffer tube 6, a locking mechanism 7, a valve plate 8 and a valve stem 9, wherein a buffer tube 6 is radially arranged at one end of the pipe body 1, and a valve cover 4 is radially arranged at the other end of the pipe body 1, a buffer assembly 3 for absorbing water flow pressure is arranged in the buffer tube 6, a valve plate 8 for blocking both ends of the pipe body 1 is arranged in the valve cover 4, a locking mechanism 7 is arranged on the outer end surface of the top of the valve cover 4, a valve stem 9 is arranged at the center of the end of the valve plate 8, the valve stem 9 passes through the top of the valve cover 4 and is fixed in an unblocked state by the locking mechanism 7, a driving spring 5 sleeved on the outside of the valve stem 9 is arranged between the valve plate 8 and the valve cover 4, the driving spring 5 forces the valve plate 8 to block both ends of the pipe body 1, the locking mechanism 7 is communicated with the buffer tube 6 through the hydraulic hose 2, and when the pressure in the buffer tube 6 increases suddenly, the hydraulic hose 2 transmits the pressure to the locking mechanism 7 to unlock the valve stem 9 for blocking;

[0018] The buffer assembly 3 includes a buffer piston 31, a hydraulic piston 32 and a pressure spring 33. The hydraulic piston 32 is arranged in the middle of the buffer tube 6. The hydraulic piston 32 divides the inside of the buffer tube 6 into a top hydraulic cavity 34 and a bottom buffer cavity 35. The bottom of the buffer cavity 35 is provided with an axially slidably connected buffer piston 31. The bottom of the buffer piston 31 is communicated with the inside of the tube body 1. The pressure spring 33 is arranged in the hydraulic cavity 34 at the top of the hydraulic piston 32. The pressure spring 33 forces the hydraulic piston 32 to be in the middle of the buffer tube 6. The hydraulic cavity 34 is connected to one end of the hydraulic hose 2.

[0019] The hydraulic cavity 34 contains incompressible oil, the buffer cavity 35 contains compressible gas, and the gas pressure in the buffer cavity 35 is the same as the liquid pressure in the normal flow state in the pipe body 1;

[0020] The top of the valve stem 9 has a locking groove 91, and a reset lever 92 is radially extended from the top of the valve stem 9; the valve plate 8 can be reset by moving the lever upward;

[0021] The locking mechanism 7 includes a locking pin 71, a locking piston 72, a locking spring 73 and a U-shaped positioning block 74. The open end of the U-shaped positioning block 74 is fixedly connected to the top of the buffer tube 6. The U-shaped positioning block 74 has a plurality of cavities radially for installing the locking piston 72. One end of the locking piston 72 is fixedly connected to the locking pin 71. The other end of the locking piston 72 is provided with a locking spring 73. The locking spring 73 forces the locking pin 71 to be inserted into the locking pin 71 at the top of the valve stem 9. The U-shaped positioning block 74 also has a flow channel 75 connected to the hydraulic hose 2. The flow channel 75 is connected to one side of the locking piston 72. When there is pressure in the flow channel 75, the locking piston 72 moves to one side to remove the locking pin 71 from the locking groove 91 at the top of the valve stem 9.

[0022] Through the above settings, in the actual working process, its specific working principle is as follows:

[0023] First, the pipe body 1 of the device is installed in the booster pipeline of the water pump. When a small impact force appears in the pipeline, the water pressure in the pipe body 1 pushes the buffer piston 31 to move, so that the gas in the buffer cavity 35 is compressed, thereby absorbing the impact force to prevent the pipeline and the water pump from being damaged. In this process, since the pressure spring 33 is arranged in the hydraulic cavity 34 at the top of the hydraulic piston 32, the gas pressure in the buffer cavity 35 does not reach the level of pushing the hydraulic piston 32, so that the hydraulic piston 32 is still in the middle of the buffer tube 6 and does not move.

[0024] When the pressure in the pipeline increases suddenly, the water pressure in the tube body 1 pushes the buffer piston 31 to move quickly, so that the gas inside the buffer chamber 35 is completely compressed. At this time, the gas pressure in the buffer chamber 35 reaches the level of pushing the hydraulic piston 32, so that the hydraulic piston 32 transports the oil through the hydraulic hose 2 to the flow channel of the U-shaped positioning block 74, and drives the locking piston 72 to move to one side to remove the locking pin 71 from the locking groove 91 at the top of the valve stem 9. At this time, the valve stem 9 and the valve plate 8 are not restricted, and the valve plate 8 blocks the two ends of the tube body 1 by driving the spring 5, thereby preventing the water flow from continuing to impact the water pump and causing damage.

[0025] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A water hammer effect linkage valve, characterized in that: It includes a tube body, a hydraulic hose, a buffer assembly, a valve cover, a driving spring, a buffer tube, a locking mechanism, a valve plate and a valve stem. A buffer tube is radially provided at one end of the tube body, and a valve cover is radially provided at the other end of the tube body. A buffer assembly for absorbing water flow pressure is provided in the buffer tube. A valve plate for blocking both ends of the tube body is provided in the valve cover. A locking mechanism is provided on the outer end surface of the top of the valve cover. A valve stem is provided at the center of the valve plate end. The valve stem passes through the top of the valve cover and is fixed in an unblocked state by the locking mechanism. A driving spring is provided between the valve plate and the valve cover and is sleeved outside the valve stem. The driving spring forces the valve plate to block both ends of the tube body. The locking mechanism is connected to the buffer tube through a hydraulic hose. When the pressure in the buffer tube increases suddenly, the hydraulic hose transmits the pressure to the locking mechanism to unlock the valve stem for blocking.

2. A water hammer effect linkage valve according to claim 1, characterized in that: The buffer assembly includes a buffer piston, a hydraulic piston and a pressure spring. The hydraulic piston is arranged in the middle of the buffer tube. The hydraulic piston divides the interior of the buffer tube into a top hydraulic cavity and a bottom buffer cavity. An axially slidably connected buffer piston is provided at the bottom of the buffer cavity. The bottom of the buffer piston is connected to the interior of the tube body. The pressure spring is arranged in the hydraulic cavity at the top of the hydraulic piston. The pressure spring forces the hydraulic piston to be in the middle of the buffer tube. The hydraulic cavity is connected to one end of a hydraulic hose.

3. A water hammer effect linkage valve according to claim 2, characterized in that: The hydraulic cavity contains incompressible oil, the buffer cavity contains compressible gas, and the gas pressure in the buffer cavity is the same as the liquid pressure in the pipe body in a normal flow state.

4. The water hammer effect linkage valve according to claim 1, characterized in that: The top of the valve stem is provided with a locking groove, and a reset lever is radially extended from the top of the valve stem.

5. The water hammer effect linkage valve according to claim 1, characterized in that: The locking mechanism includes a locking pin, a locking piston, a locking spring and a U-shaped positioning block. The open end of the U-shaped positioning block is fixedly connected to the top of the buffer tube. The U-shaped positioning block radially has a plurality of cavities for installing the locking piston. One end of the locking piston is fixedly connected to a locking pin. The other end of the locking piston is provided with a locking spring. The locking spring forces the locking pin to be inserted into the locking pin at the top of the valve stem. The U-shaped positioning block also has a flow channel connected to a hydraulic hose. The flow channel is connected to one side of the locking piston. When there is pressure in the flow channel, the locking piston moves to one side to remove the locking pin from the locking groove at the top of the valve stem.

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