Water hammer prevention valve

Abstract

The utility model discloses a water hammer prevention valve which comprises a valve body, a water outlet pipe is fixedly arranged at one end of the valve body, a water inlet pipe is fixedly installed at the other end of the valve body, and meanwhile a water hammer prevention assembly is fixedly arranged on the water inlet pipe. The water hammer prevention assembly comprises a fixing seat, the bottom of the fixing seat is welded and fixed to the surface of the water inlet pipe, a prevention cylinder is installed on the surface of the fixing seat, a buffer seat is movably installed in the prevention cylinder, a guide piece is fixedly installed on the surface of the buffer seat, a guide hole is formed in the upper end of the guide piece, and a guide rod is inserted into the guide hole in the guide piece. According to the water hammer prevention valve, when the buffer seat ascends and descends, the guide rods are installed on the tops of the four sets of guide pieces on the buffer seat, the buffer seat can be limited and guided in the ascending and descending process, and the stability of the buffer seat in the ascending and descending process is guaranteed, the buffer seat cannot incline, and the buffer seat cannot be clamped in the prevention cylinder.

Description

Technical Field

[0001] The utility model relates to the field of ball valves, in particular to a water hammer prevention valve. Background Art

[0002] A ball valve is a valve that is driven by a valve stem and rotates around the axis of the ball valve. It is mainly composed of a valve body, a ball, a valve seat, a valve stem, a handle or a turbine. The ball valve has the advantages of simple structure, small size, fast opening and closing, easy operation, and good sealing. It is mainly used to cut off, distribute, and change the flow direction of the medium in the pipeline.

[0003] The working principle of the ball valve is mainly to open and close the valve by rotating the ball. There is a hole on the ball. When the ball rotates to communicate with the pipe, the valve opens; otherwise, the valve closes.

[0004] When a ball valve is subjected to water hammer, the following problems may occur:

[0005] Valve body rupture: The impact force generated by water hammer may cause the valve body to be subjected to excessive pressure and rupture.

[0006] Seal failure: Strong pressure surges may damage seals and cause leakage.

[0007] Sphere damage: The sphere may be deformed or damaged due to the impact of water hammer.

[0008] In order to reduce the damage caused by "water hammer" to the ball valve, a water hammer eliminator is generally installed at the water inlet of the ball valve. The water hammer eliminator includes a pipe and a piston. The movement of the piston inside the pipe reduces the impact of the water flow on the ball valve. During actual use, the piston is unevenly stressed inside the pipe and is prone to tilting, causing the piston to be stuck inside the pipe and unable to perform normal lifting and lowering work. Utility Model Content

[0009] The purpose of the utility model is to provide a water hammer prevention valve to solve the defects mentioned in the above background technology.

[0010] To achieve the above object, a water hammer prevention valve is provided, comprising a valve body, a water outlet pipe is fixedly arranged at one end of the valve body, a water inlet pipe is fixedly installed at the other end of the valve body, and a water hammer prevention component is fixedly arranged on the water inlet pipe;

[0011] The water hammer prevention component includes a fixed seat, and the bottom of the fixed seat is welded and fixed to the surface of the water inlet pipe. At the same time, a prevention cylinder is installed on the surface of the fixed seat, and a buffer seat is movably installed inside the prevention cylinder. A guide plate is fixedly installed on the surface of the buffer seat, and a guide hole is opened at the upper end of the guide plate. At the same time, a guide rod is inserted into the guide hole on the guide plate, and the top of the guide rod is fixedly connected to the sealing cover, and the sealing cover is screwed and fixed to the surface of the prevention cylinder.

[0012] Preferably, a connecting seat is welded and fixed to the bottom of the prevention tube, and the connecting seat covers the surface of the fixing seat and is fixed by four sets of fixing bolts, and both the fixing seat and the connecting seat are circular in design.

[0013] Preferably, the water inlet pipe, water hammer prevention assembly and prevention cylinder are connected, and the first limiting ring and the second limiting ring are evenly installed on the inner wall of the prevention cylinder, and the buffer seat is movably arranged between the first limiting ring and the second limiting ring.

[0014] Preferably, the buffer seat is a cylindrical structure, and two sets of parallel sealing strips are installed on the outer side of the buffer seat. The sealing strips are annular structures made of rubber material, and the sealing strips are slidably arranged on the inner wall surface of the prevention tube.

[0015] Preferably, a force-bearing seat is fixedly installed at the bottom of the buffer seat, and the force-bearing seat is a semicircular structure made of plastic material, and four groups of guide plates are evenly arranged on the surface of the buffer seat.

[0016] Preferably, the guide piece is arranged in an "L" shape, and a spring is installed on the outer side of the guide rod above the guide piece, and the bottom of the guide rod is fixedly connected to the surface of the second limiting ring.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] When the buffer seat is lifted or lowered, guide rods are installed on the top of the four sets of guide plates on it, which can limit and guide the buffer seat during lifting and lowering, ensuring the stability of the buffer seat during lifting and lowering, and preventing it from tilting or getting stuck inside the prevention tube;

[0019] The energy generated by the impact of water flow is absorbed to reduce the damage to the valve body caused by the water hammer effect. When the water pressure decreases, the spring resets and releases energy, thereby buffering the pressure fluctuation. It can reduce the pressure peak caused by water hammer, make the pressure change smoother, and reduce the damage of water flow to the pipeline and valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the front view of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the water hammer prevention component of the utility model structure;

[0022] Figure 3 This is a schematic diagram of the internal structure of the water hammer prevention component of the utility model;

[0023] Figure 4 It is a schematic diagram of the axial cross-section structure of the water hammer prevention component of the utility model.

[0024] Numbers in the figure: 1. valve body; 2. water outlet pipe; 3. water inlet pipe; 4. water hammer prevention assembly; 41. fixing seat; 42. connecting seat; 43. prevention cylinder; 44. sealing cover; 45. force bearing seat; 46. first limiting ring; 47. sealing strip; 48. buffer seat; 49. guide plate; 50. second limiting ring; 51. spring; 52. guide rod. DETAILED DESCRIPTION

[0025] See also Figure 1-4 The utility model provides a water hammer prevention valve, comprising a valve body 1, a water outlet pipe 2 is fixedly arranged at one end of the valve body 1, and a water inlet pipe 3 is fixedly installed at the other end of the valve body 1, and a water hammer prevention component 4 is fixedly arranged on the water inlet pipe 3;

[0026] The water hammer prevention assembly 4 includes a fixed seat 41, and the bottom of the fixed seat 41 is welded and fixed to the surface of the water inlet pipe 3. At the same time, a prevention cylinder 43 is installed on the surface of the fixed seat 41, and a buffer seat 48 is movably installed inside the prevention cylinder 43. A guide piece 49 is fixedly installed on the surface of the buffer seat 48, and a guide hole is provided at the upper end of the guide piece 49. At the same time, a guide rod 52 is inserted into the guide hole on the guide piece 49, and the top of the guide rod 52 is fixedly connected to the sealing cover 44, and the sealing cover 44 is screwed and fixed to the surface of the prevention cylinder 43.

[0027] Working principle: When the valve body 1 is closed, the high-pressure water flow enters the interior of the prevention cylinder 43, and the water pressure inside the prevention cylinder 43 increases, causing the buffer seat 48 to move upward, causing the four sets of guide plates 49 to move upward and compress the spring 51, thereby absorbing the energy generated by the impact of the water flow and reducing the damage to the valve body 1 caused by the water hammer effect. When the water pressure decreases, the spring 51 resets and releases energy, thereby buffering the pressure fluctuation; the pressure peak generated by the water hammer can be reduced, the pressure change can be smoother, and the damage to the pipeline and the valve body 1 by the water flow can be reduced.

[0028] As a preferred embodiment, a connecting seat 42 is welded and fixed to the bottom of the prevention tube 43, and the connecting seat 42 covers the surface of the fixing seat 41 and is fixed by four sets of fixing bolts. At the same time, the fixing seat 41 and the connecting seat 42 are both circular.

[0029] The water inlet pipe 3, the water hammer prevention assembly 4 and the prevention tube 43 are connected, and the first limiting ring 46 and the second limiting ring 50 are evenly installed on the inner wall of the prevention tube 43, and the buffer seat 48 is movably arranged between the first limiting ring 46 and the second limiting ring 50.

[0030] like Figure 1-4As shown: the buffer seat 48 is movably arranged between the first limiting ring 46 and the second limiting ring 50. The buffer seat 48 is raised and lowered inside the prevention cylinder 43, so as to buffer and balance the impact force generated by the water flow, reduce the impact force caused by the water hammer effect, and protect the valve body 1.

[0031] As a preferred embodiment, the buffer seat 48 is a cylindrical structure, and two sets of parallel sealing strips 47 are installed on the outer side of the buffer seat 48. The sealing strips 47 are annular structures made of rubber material, and the sealing strips 47 are slidably arranged on the inner wall surface of the prevention tube 43.

[0032] like Figure 2-4 As shown: two sets of sealing strips 47 are installed on the outer side of the buffer seat 48, and the sealing strips 47 are slidably set on the inner wall surface of the prevention tube 43, which can perform double-layer sealing between the buffer seat 48 and the prevention tube 43 to prevent water from flowing into the upper position of the buffer seat 48.

[0033] As a preferred embodiment, a force-bearing seat 45 is fixedly installed at the bottom of the buffer seat 48 , and the force-bearing seat 45 is a semicircular structure made of plastic material. At the same time, four groups of guide plates 49 are evenly arranged on the surface of the buffer seat 48 .

[0034] As a preferred embodiment, the guide piece 49 is set in an “L” shape, and a spring 51 is installed on the outside of the guide rod 52 above the guide piece 49, and the bottom of the guide rod 52 is fixedly connected to the surface of the second limiting ring 50.

[0035] A semicircular force-bearing seat 45 is arranged at the bottom of the buffer seat 48, and the surface of the force-bearing seat 45 is arranged in an arc shape, so that the water flow pressure can evenly bear force on the surface of the force-bearing seat 45. At the same time, when the buffer seat 48 is lifted or lowered, guide rods 52 are installed on the tops of the four groups of guide plates 49 thereon, which can limit and guide the buffer seat 48 when being lifted or lowered, thereby ensuring the stability of the buffer seat 48 when being lifted or lowered, and preventing it from tilting or getting stuck in the inside of the prevention tube 43.

Claims

1. A water hammer prevention valve, comprising a valve body (1), characterized in that: A water outlet pipe (2) is fixedly arranged at one end of the valve body (1), and a water inlet pipe (3) is fixedly installed at the other end of the valve body (1), and a water hammer prevention component (4) is fixedly arranged on the water inlet pipe (3); The water hammer prevention assembly (4) comprises a fixing seat (41), and the bottom of the fixing seat (41) is welded and fixed on the surface of the water inlet pipe (3), and a prevention tube (43) is installed on the surface of the fixing seat (41), and a buffer seat (48) is movably installed inside the prevention tube (43), and a guide piece (49) is fixedly installed on the surface of the buffer seat (48), and a guide hole is provided at the upper end of the guide piece (49), and a guide rod (52) is inserted into the guide hole on the guide piece (49), and the top of the guide rod (52) is fixedly connected to the sealing cover (44), and the sealing cover (44) is screwed and fixed on the surface of the prevention tube (43).

2. A water hammer prevention valve according to claim 1, characterized in that: A connecting seat (42) is welded and fixed to the bottom of the prevention tube (43), and the connecting seat (42) covers the surface of the fixing seat (41) and is fixed by four sets of fixing bolts. At the same time, the fixing seat (41) and the connecting seat (42) are both circular in shape.

3. A water hammer prevention valve according to claim 1, characterized in that: The water inlet pipe (3), the water hammer prevention assembly (4) and the prevention tube (43) are connected and arranged, and a first limiting ring (46) and a second limiting ring (50) are evenly installed on the inner wall of the prevention tube (43), and the buffer seat (48) is movably arranged between the first limiting ring (46) and the second limiting ring (50).

4. A water hammer prevention valve according to claim 3, characterized in that: The buffer seat (48) is a cylindrical structure, and two sets of parallel sealing strips (47) are installed on the outer side of the buffer seat (48). The sealing strips (47) are annular structures made of rubber material. The sealing strips (47) are slidably arranged on the inner wall surface of the prevention tube (43).

5. A water hammer prevention valve according to claim 1, characterized in that: The force bearing seat (45) is fixedly mounted on the bottom of the buffer seat (48), and the force bearing seat (45) is a semicircular structure made of plastic material. Meanwhile, four groups of guide pieces (49) are evenly arranged on the surface of the buffer seat (48).

6. A water hammer prevention valve according to claim 1, characterized in that: The guide piece (49) is arranged in an "L" shape, and a spring (51) is installed on the outer side of the guide rod (52) above the guide piece (49), and the bottom of the guide rod (52) is fixedly connected to the surface of the second limiting ring (50).

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