Water hammer preventing structure of water inlet valve

Abstract

The utility model discloses a water hammer prevention structure of a water inlet valve, which comprises a water inlet pipeline and a flow limiter arranged in the water inlet pipeline, the flow limiter comprises a body, the body is provided with a plurality of flow limiting holes, and the flow direction of water in the water inlet pipeline is defined as the water replenishing direction after a water stop rubber mat opens the water inlet pipeline. The flow limiting device further comprises a buffering piece arranged in the water inlet pipeline, the flow limiting device is located on the upstream of the buffering piece in the water supplementing direction, the buffering piece is of a conical cylindrical structure, the direction of the small end of the buffering piece is consistent with the water supplementing direction, an opening is formed in the large end of the buffering piece, and a plurality of flow dividing holes are evenly formed in the side wall of the buffering piece in the circumferential direction at intervals. The backflow water passes through the flow dividing holes to form a plurality of branches of flow dividing water, the flow dividing water collides with one another to consume energy, and then the flow limiter blocks and consumes energy on the backflow water, so that the energy of the backflow water is remarkably reduced, the pressure in the pipeline is remarkably reduced, and the water hammer effect is effectively prevented.

Description

Technical Field

[0001] This utility model relates to a pressure-reducing and flow-limiting structure installed in a water inlet pipe, and in particular to a water inlet valve structure for preventing water hammer. Background Technology

[0002] To prevent noise from excessive water flow and damage to the sealing gasket of the inlet valve, some inlet valves are equipped with flow restrictors in the inlet channel. Conventional flow restrictors mainly use flow-limiting orifices to cut off the flow and reduce the flow rate. However, when the inlet valve stops flowing, the water pressure suddenly increases, and backflow of water in the pipeline can easily cause water hammer, resulting in vibration and vibration noise. Conventional flow restrictors cannot effectively prevent water hammer after the inlet valve stops flowing. Utility Model Content

[0003] This utility model provides a water inlet valve structure to prevent water hammer, which overcomes the shortcomings of the prior art. The technical solution adopted by this utility model to solve its technical problem is as follows:

[0004] The water inlet valve has a water hammer prevention structure, including a water inlet pipe and a flow restrictor installed in the water inlet pipe. The flow restrictor includes a body with multiple flow restricting holes. The direction of water flow in the water inlet pipe after the water-stop rubber gasket is opened is defined as the water replenishment direction. It also includes a buffer installed in the water inlet pipe. The flow restrictor is located upstream of the buffer in the water replenishment direction. The buffer is a conical cylindrical structure with the small end facing the same direction as the water replenishment direction and forming an open opening at the large end. Multiple diversion holes are evenly spaced along the circumference on the side wall.

[0005] In a preferred embodiment: a partition plate is provided on the outer surface of the sidewall of the buffer member between two adjacent diversion holes.

[0006] In a preferred embodiment, the number of the diversion holes is an even number.

[0007] In a preferred embodiment, the buffer is a plastic component.

[0008] In a preferred embodiment, the cushioning element is a soft plastic component.

[0009] In a preferred embodiment: a flange ring is provided on the outside of the open end of the buffer, a shoulder is provided inside the water inlet pipe, and the flow restrictor presses the flange ring into the shoulder.

[0010] In a preferred embodiment: the flow limiter is snapped into the water inlet pipe.

[0011] In a preferred embodiment: a groove is provided at the center of the end face of the body facing the buffer, and the flow-limiting holes are evenly spaced around the outside of the groove.

[0012] In a preferred embodiment: a partition plate is provided on the end face of the body facing the buffer member between two adjacent flow-limiting holes, the inner end of the partition plate stopping at the edge of the groove; an arc-shaped surrounding plate is also provided on the end face of the body facing the buffer member between two adjacent flow-limiting holes, and the outer end of the partition plate is connected to the arc-shaped surrounding plate.

[0013] In a preferred embodiment: the end face of the body facing away from the buffer has an annular protrusion in the middle, and the outer peripheral surface of the annular protrusion has a groove at the root position. The flow limiter also includes a sealing ring, which is fitted in the groove and covers the inner part of the flow limiting hole.

[0014] Compared with the prior art, this technical solution has the following advantages:

[0015] 1. After the inlet valve closes the inlet pipe with the sealing gasket, the water in the inlet pipe flows back. The backflowing water passes through the buffer and the flow restrictor in sequence. The buffer first blocks and dissipates the energy of the backflowing water. Since the buffer has multiple diversion holes evenly arranged on its side wall, the backflowing water forms multiple streams after passing through these diversion holes. These streams collide with each other and dissipate energy. Then, the flow restrictor blocks and dissipates the energy of the backflowing water, thereby significantly reducing the energy of the backflowing water and significantly reducing the pressure in the pipe, effectively preventing the occurrence of water hammer effect.

[0016] 2. The partition plate can make the return water more evenly distributed, so that the collision between the distributed water and the water dissipates energy more effectively.

[0017] 3. The buffer components are made of plastic, especially soft plastic, which can simultaneously unload the energy of the return water and further reduce the kinetic energy of the return water.

[0018] 4. The buffer and flow limiter can be installed into the inlet pipe in sequence, which is easy to assemble.

[0019] 5. The main body is equipped with partition plates and arc-shaped surrounding plates, so that the return water passes through these diversion holes more evenly, thereby ensuring uniform water pressure on the sealing ring, uniform deformation of the sealing ring, and better energy absorption and flow restriction effects of the sealing ring. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 A schematic diagram of the internal structure of the water inlet valve is shown.

[0022] Figure 2 It is illustrated Figure 1 The enlarged diagram of position A (the arrow indicates the direction of the return water).

[0023] Figure 3 A three-dimensional schematic diagram of the buffer component is shown.

[0024] Figure 4 Another three-dimensional schematic diagram of the buffer component is shown.

[0025] Figure 5 A three-dimensional schematic diagram of the current limiter is shown.

[0026] Figure 6 Another three-dimensional schematic diagram of the current limiter is shown. Detailed Implementation

[0027] Please refer to Figures 1 to 6 The inlet valve is used for water replenishment. A water-stop gasket 10 is positioned between the inlet pipe 20 and the outlet pipe 30. The water-stop gasket 10 opens and closes the outlet end of the inlet pipe 20. When replenishing water, the water-stop gasket 10 opens the inlet pipe 20, allowing water to flow from the inlet pipe 20 into the outlet pipe 30, and finally into the toilet tank. When water needs to be stopped, the water-stop gasket 10 automatically closes the inlet pipe 20 under the action of the back pressure valve 40. The working principle of the inlet valve is existing technology and will not be described in detail. It can be understood that the direction of water flow in the inlet pipe after the water-stop gasket 10 opens the inlet pipe 20 is defined as the water replenishment direction. Figure 2 The direction from left to right.

[0028] The water inlet valve anti-water hammer structure of this application is used to prevent the water hammer effect caused by the increased pressure in the pipeline after the water inlet valve is shut off, i.e., after the water-stop rubber gasket 10 closes the water inlet pipeline 20. The water inlet valve anti-water hammer structure includes a water inlet pipeline 20 and a flow restrictor 50 disposed in the water inlet pipeline. The flow restrictor 50 includes a body 52, which has multiple flow restricting holes 521, and also includes a buffer member 60 disposed in the water inlet pipeline 20. The flow restrictor 50 is located upstream of the buffer member 60 in the water supply direction. That is, when water is supplied, the water first passes through the flow restrictor 50 and then through the buffer member 60. Therefore, if it is backflow water, the opposite is true. Backflow water first passes through the buffer member 60 and then through the flow restrictor 50. The buffer member 60 is a conical cylindrical structure with the small end facing the same direction as the water supply direction and forming an open opening at the large end. Multiple diversion holes 62 are evenly spaced along the circumference on the side wall. During water replenishment, the water flows into the inlet pipe 20, first passing through the flow-limiting orifice 521 of the flow restrictor 50, and then through the diversion orifice 62 of the buffer 60. Both the flow restrictor 50 and the buffer 60 can intercept and buffer the water flow, stabilizing it. After the water replenishment is turned off, the return water passes through the diversion orifice 62 under the resistance of the buffer 60. The water flows collide with each other, consuming energy, and then are again resisted by the flow restrictor 50 before passing through the flow-limiting orifice 521.

[0029] Preferably, a partition plate 64 is provided on the outer surface of the sidewall of the buffer member 60 between two adjacent diversion holes 62.

[0030] Preferably, the number of the diversion holes 62 is an even number, and in this embodiment, the number is four.

[0031] Preferably, the cushioning element 60 is a plastic part. More preferably, the cushioning element is a soft plastic part.

[0032] Preferably, a flange ring 66 is provided on the outer side of the open end of the buffer 60, and a shoulder 22 is provided inside the water inlet pipe 20. The flow restrictor 50 presses and fixes the flange ring 66 into the shoulder 22. More preferably, the flow restrictor 50 is snapped into the water inlet pipe 20. In this embodiment, the outer periphery of the body 52 is provided with a rib, which frictionally engages with the inner wall of the water inlet pipe 20.

[0033] Preferably, a groove 522 is provided at the center of the end face of the body 52 facing the buffer member 60, and the flow-limiting holes 521 are evenly distributed around the outside of the groove 522.

[0034] Preferably, a separator 523 is provided on the end face of the body 52 facing the buffer member 60 between two adjacent flow-limiting holes. The inner end of the separator 523 stops at the edge of the groove 522. An arc-shaped surrounding piece 524 is also provided on the end face of the body 52 facing the buffer member between two adjacent flow-limiting holes. The outer end of the separator 523 is connected to the arc-shaped surrounding piece 524.

[0035] Preferably, the end face of the body 52 facing away from the buffer member has an annular protrusion 525 in the middle, and the outer peripheral surface of the annular protrusion 525 has a groove at its root. The flow restrictor 50 also includes a sealing ring 54, which is fitted into the groove and covers the inner part of the flow restricting hole 521. The greater the water pressure, the greater the deformation of the sealing ring 54, and the larger the area of ​​the flow restricting hole 521 covered.

[0036] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the present utility model patent and the contents of the specification should still fall within the scope of the present utility model.

Claims

1. A water inlet valve structure for preventing water hammer, comprising a water inlet pipe and a flow restrictor disposed within the water inlet pipe, the flow restrictor comprising a body having multiple flow restricting holes, wherein the direction of water flow in the water inlet pipe after the water-stop gasket is opened is defined as the water replenishment direction, characterized in that: It also includes a buffer component installed in the water inlet pipe. The flow restrictor is located upstream of the buffer component in the water supply direction. The buffer component is a conical cylindrical structure with the small end facing the same direction as the water supply direction and an open opening at the large end. Multiple diversion holes are evenly spaced along the circumference on the side wall.

2. The water inlet valve water hammer prevention structure according to claim 1, characterized in that: A partition plate is provided on the outer surface of the sidewall of the buffer component between two adjacent diversion holes.

3. The inlet valve structure for preventing water hammer according to claim 1 or 2, characterized in that: The number of the diversion holes is an even number.

4. The inlet valve anti-water hammer structure according to claim 3, characterized in that: The cushioning component is made of plastic.

5. The inlet valve anti-water hammer structure according to claim 4, characterized in that: The cushioning element is made of soft plastic.

6. The water inlet valve water hammer prevention structure according to claim 3, characterized in that: A flange ring is provided on the outside of the open end of the buffer, and a shoulder is provided inside the water inlet pipe. The flow restrictor presses the flange ring into the shoulder.

7. The water inlet valve water hammer prevention structure according to claim 6, characterized in that: The flow limiter is snapped into the water inlet pipe.

8. The water inlet valve water hammer prevention structure according to claim 1, characterized in that: The body has a groove at the center of the end face facing the buffer, and the flow-limiting holes are evenly spaced around the outside of the groove.

9. The inlet valve waterproof hammer structure according to claim 8, characterized in that: The end face of the body facing the buffer member has a separator between two adjacent flow-limiting holes. The inner end of the separator stops at the edge of the groove. The end face of the body facing the buffer member also has an arc-shaped surrounding plate between two adjacent flow-limiting holes. The outer end of the separator is connected to the arc-shaped surrounding plate.

10. The inlet valve waterproof hammer structure according to claim 8 or 9, characterized in that: The end face of the main body facing away from the buffer has an annular protrusion in the middle, and the outer peripheral surface of the annular protrusion has a groove at the root position. The flow limiter also includes a sealing ring, which is fitted in the groove and covers the inner part of the flow limiting hole.

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