Valve capable of reducing opening and closing noise of valve

Abstract

The utility model discloses a valve capable of reducing valve opening and closing noise. The valve comprises a valve body and a noise reduction pipe arranged at the outlet end of the valve body through a connecting flange. Fluid pressure is reduced through three times of diameter expansion of the inner buffer pipe, and when the fluid passes through the first annular channel and the second annular channel, secondary pressure reduction is formed through the arrangement that the section size of the first annular channel is larger than the section size of the inner diameter of the third pipe body and the section size of the first annular channel is smaller than the section size of the second annular channel. When the fluid flows into the noise reduction pipe from the second annular channel, the size of the flowing section continues to be increased, third-time pressure reduction is formed, after three-time sufficient pressure reduction, the speed of the fluid is reduced, impact on a pipeline is reduced, and the purpose of noise reduction is achieved; the first sound insulation layer made of silencing cotton and the second sound insulation layer made of a rubber layer are sequentially arranged on the outer wall of the noise reduction pipe from inside to outside, and noise generated when fluid rushes into the noise reduction pipe is fully absorbed and isolated.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve capable of reducing valve opening and closing noise. Background Art

[0002] When the valve is opened or closed, the valve core rotates with the valve stem, and its opening is a process of gradual expansion or contraction. Therefore, the valve core has a contraction section in the valve body channel at the moment of opening and closing. During the opening and closing process, as the opening of the valve core expands or contracts, a certain pressure difference is generated on both sides of the valve when the fluid flows through the valve, and the size of the pressure difference changes with the change of the opening. In the initial and later stages of closing, due to the small opening of the valve port, a large pressure difference is generated on both sides of the valve core, and the large pressure difference brings a high flow rate to the fluid. When the fluid passes through the valve at a high speed, turbulence, flashing and cavitation occur in the fluid. During the liquid operation process, when the high-pressure fluid passes through the valve in a turbulent form, the turbulence will generate noise. When the size of the contraction section changes, the fluid velocity changes proportionally, and the noise also increases accordingly.

[0003] To this end, there is a public technology on the market that proposes a valve with noise reduction and silencing functions, including an infusion valve, a liquid inlet pipe is welded and fixed on the left side of the infusion valve, and a liquid outlet pipe is welded and fixed on the upper surface of the infusion valve, a flange is welded and fixed on the outside of the outlet pipe, a valve motor is bolted to the top of the infusion valve, and a sound insulation cotton pad is nested and wrapped just above the infusion valve, and also includes: an external sound insulation mechanism, which is nested and fixed on the outside of the infusion valve, and the bottom end of the external sound insulation mechanism is clamped and connected with an aluminum alloy mesh plate, a ball valve block, and an infusion hole is opened on the outside of the ball valve block; an internal silencing mechanism, which is nested and fixed inside the infusion valve. The valve with noise reduction and silencing function is provided with an external sound insulation mechanism and a vertical support arm. The vertical support arm is used to guide the bottom of a sound insulation cotton pad. The sound insulation cotton pad and the infusion valve are separated and disassembled according to the use requirements, so that the sound insulation cotton pad can be used to block and soundproof the top of the infusion valve. The disclosed technology aims to solve the problem of corresponding adjustment between the external sound insulation structure and the actual size of the valve, and does not actually play a corresponding role in the noise reduction itself. There is also an improved technology highlighting a valve pressure regulating and noise reduction device, including a valve body, the outside of the valve body is fixedly connected to an entry joint, the outside of the valve body is fixedly connected to a cover body, and the inside of the cover body A muffler assembly is movably connected, an output joint is fixedly connected to the outside of the cover body, a first opening is provided on the surface of the valve body, a second opening is provided on the surface of the valve body, and a sealing seat is fixedly connected to the inside of the valve body; the screw is driven to rise and fall inside the protective cover by the rotation of the screw disk, and the lifting of the screw drives the pressure regulating plate to slide at a uniform speed inside the valve body to adjust the fluid pressure inside the valve body, thereby ensuring the stability of the valve pressure regulation; at the same time, the fluid flows into the inside of the air inlet sleeve and flows inside the elbow to increase the fluid stroke and reduce the fluid flow rate, and then is discharged into the output joint through the air outlet sleeve, so that the internal fluid stroke increases and the flow rate decreases after the valve pressure is regulated, thereby reducing the noise of the valve pressure regulation;

[0004] However, the above-mentioned improvement technology only increases the fluid travel length by a certain amount through the bend pipe. The actual increase is very small, and the noise reduction effect it can bring is very limited, which needs to be further improved. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a valve which reduces the opening and closing noise of the valve.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a valve for reducing the opening and closing noise of a valve, comprising a valve body and a noise reduction pipe arranged at the outlet end of the valve body through a connecting flange, the outer wall of the noise reduction pipe being provided with a first sound insulation layer and a second sound insulation layer in sequence from the inside to the outside, the inner wall of the noise reduction pipe and the end located close to the valve body being fixedly connected with a baffle, the inner wall of the baffle being provided with a water inlet hole which passes through from left to right, the side of the baffle away from the valve body being fixedly connected with an inner buffer pipe through a fixing plate, the inner cavity of the inner buffer pipe being opposite to the water inlet hole on the left and right, the inner buffer pipe being composed of a first tube body, a second tube body and a third tube body which are distributed on the left and right, the outer wall of the inner buffer tube and the end located away from the baffle being fixedly connected with the outer buffer tube through multiple groups of first brackets and second brackets, the inner wall of the noise reduction tube and the end located away from the baffle being fixedly connected with an inner liner layer on the right side of the baffle, and the inner wall of the inner liner layer being provided with a sound-absorbing structure.

[0007] As a further description of the above technical solution:

[0008] The first tube body and the second tube body as well as the second tube body and the third tube body are connected via a tapered tube, and the inner diameter of the second tube body is larger than that of the first tube body and smaller than that of the third tube body.

[0009] As a further description of the above technical solution:

[0010] A first annular channel is formed between the inner wall of the outer buffer tube and the outer wall of the third tube body, and a second annular channel is formed between the outer wall of the outer buffer tube and the inner wall of the inner liner layer. The cross-sectional size of the first annular channel is larger than the cross-sectional size of the inner cavity of the third tube body and the cross-sectional size of the first annular channel is smaller than the cross-sectional size of the second annular channel.

[0011] As a further description of the above technical solution:

[0012] The sound-absorbing structure comprises a plurality of groups of sound-absorbing holes, wherein the plurality of groups of sound-absorbing holes are all arranged on the inner side wall of the liner layer, and the axes of the plurality of groups of sound-absorbing holes are all perpendicular to the axis line of the liner layer.

[0013] As a further description of the above technical solution:

[0014] An arc bottom is arranged at one end of the outer buffer tube away from the baffle, and the arc radius of the arc bottom is consistent with the radius of the outer buffer tube.

[0015] As a further description of the above technical solution:

[0016] The first sound insulation layer is sound-absorbing cotton.

[0017] As a further description of the above technical solution:

[0018] The second sound insulation layer is a rubber layer.

[0019] The utility model has the following beneficial effects:

[0020] 1. Compared with the prior art, the valve for reducing the opening and closing noise of the valve, when the valve core in the valve body moves to change the flow cross-section, the fluid enters the inner buffer tube from the water inlet hole of the baffle plate, and the fluid pressure is reduced by the three-time diameter expansion of the inner buffer tube. The fluid after the first decompression flows into the first annular channel and the second annular channel along the bottom of the arc, and then flows out through the end of the noise reduction tube away from the valve body. When passing through the first annular channel and the second annular channel, the cross-sectional size of the first annular channel is larger than the cross-sectional size of the inner diameter of the third tube body and the cross-sectional size of the first annular channel is smaller than the cross-sectional size of the second annular channel, so that a secondary decompression is formed. When the fluid flows from the second annular channel into the interior of the noise reduction tube, the flow cross-sectional size continues to increase, so that a third decompression is formed. After three sufficient decompressions, the fluid velocity is reduced, the impact on the pipeline is reduced, and the purpose of noise reduction is achieved.

[0021] 2. Compared with the prior art, the valve for reducing the opening and closing noise of the valve has a plurality of groups of silencer holes on the inner wall of the inner liner layer, and the outer wall of the noise reduction tube is provided with a first sound insulation layer made of silencer cotton and a second sound insulation layer made of rubber layer from the inside to the outside. The noise generated when the fluid rushes into the noise reduction tube is fully absorbed and isolated, which plays a role in supplementing noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a valve for reducing valve opening and closing noise proposed by the utility model;

[0023] Figure 2 This is a partial cross-sectional view of the internal structure of a noise reduction pipe of a valve for reducing the opening and closing noise of the valve proposed by the utility model;

[0024] Figure 3 The utility model is a schematic diagram of the partial structure of an inner buffer tube of a valve for reducing valve opening and closing noise.

[0025] Legend:

[0026] 1. Valve body; 2. Connecting flange; 3. Noise reduction pipe; 4. First sound insulation layer; 5. Second sound insulation layer; 6. Inner liner layer; 7. Silence hole; 8. Baffle; 9. Water inlet hole; 10. Fixed plate; 11. Inner buffer tube; 12. First bracket; 13. Second bracket; 14. Outer buffer tube; 15. Arc bottom; 1101. First tube body; 1102. Second tube body; 1103. Third tube body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Reference Figures 1 to 3 The utility model provides a valve for reducing the noise of valve opening and closing: comprising a valve body 1 and a noise reduction pipe 3 arranged at the outlet end of the valve body 1 through a connecting flange 2, the outer wall of the noise reduction pipe 3 is provided with a first sound insulation layer 4 and a second sound insulation layer 5 from the inside to the outside, the first sound insulation layer 4 is a sound-absorbing cotton, and the second sound insulation layer 5 is a rubber layer, the sound-absorbing cotton has a good sound absorption effect, and the rubber layer has a good sound insulation effect. When the valve body 1 is opened and closed, the fluid passes through the noise reduction pipe 3 and the noise is fully reduced. The remaining noise can be absorbed and isolated by the first sound insulation layer 4 and the second sound insulation layer 5, which plays an auxiliary noise reduction role;

[0029] like Figure 2 , Figure 3 As shown, in order to reduce the pressure of the fluid, a baffle 8 is fixedly connected to the inner wall of the noise reduction tube 3 and one end close to the valve body 1. The inner wall of the baffle 8 is provided with a water inlet hole 9 which passes through from left to right. The side of the baffle 8 away from the valve body 1 is fixedly connected with an inner buffer tube 11 through a fixing plate 10. The inner cavity of the inner buffer tube 11 is opposite to the water inlet hole 9 on the left and right. The inner buffer tube 11 is composed of a first tube body 1101, a second tube body 1102 and a third tube body 1103 which are distributed on the left and right. The first tube body 1101 and the second tube body 1102 and the second tube body 1102 and the third tube body 1103 are connected by a tapered tube. The inner diameter of the second tube body 1102 is larger than the inner diameter of the first tube body 1101 and smaller than the inner diameter of the third tube body 1103. The inner diameter of the inner buffer tube 11 increases from left to right, so that the pressure of the fluid can be effectively reduced when passing through, and the impact is reduced.

[0030] like Figure 2As shown, in order to continue to reduce the pressure of the fluid, the outer wall of the inner buffer tube 11 and the end located away from the baffle 8 are fixedly connected to the outer buffer tube 14 through multiple groups of first brackets 12 and second brackets 13. The end of the outer buffer tube 14 away from the baffle 8 is provided with an arc bottom 15, and the arc radius of the arc bottom 15 is consistent with the radius of the outer buffer tube 14. A first annular channel is formed between the inner wall of the outer buffer tube 14 and the outer wall of the third tube body 1103, and a second annular channel is formed between the outer wall of the outer buffer tube 14 and the inner wall of the inner liner layer 6. The cross-sectional size of the first annular channel is larger than the cross-sectional size of the inner cavity of the third tube body 1103. The cross-sectional size of the first annular channel is smaller than that of the second annular channel. After the fluid is depressurized once, it enters the first annular channel along the arc bottom 15. The cross-sectional size of the first annular channel is larger than the cross-sectional size of the inner diameter of the third tube body 1103 and the cross-sectional size of the first annular channel is smaller than that of the second annular channel. When the fluid passes through, secondary pressure reduction is formed. When the fluid flows from the second annular channel into the noise reduction tube 3, the cross-sectional size that can flow continues to increase, forming a third pressure reduction. After three full pressure reductions, the fluid velocity is reduced, reducing the impact on the pipeline, thereby achieving the purpose of noise reduction.

[0031] like Figure 1 , Figure 2 As shown, in order to improve the noise reduction effect, the inner wall of the noise reduction tube 3 is fixedly connected to the inner liner layer 6 on the right side of the baffle 8, and the inner wall of the inner liner layer 6 is provided with a sound-absorbing structure, which includes multiple groups of sound-absorbing holes 7. The multiple groups of sound-absorbing holes 7 are all arranged on the inner wall of the inner liner layer 6, and the axes of the multiple groups of sound-absorbing holes 7 are all perpendicular to the axis of the inner liner layer 6. The noise generated by the fluid entering the noise reduction tube 3 is partially absorbed by the multiple groups of sound-absorbing holes 7 after the noise reduction, thereby improving the noise reduction effect.

[0032] Working principle: The first sound insulation layer 4 is sound-absorbing cotton, and the second sound insulation layer 5 is a rubber layer. The sound-absorbing cotton has a good sound-absorbing effect, and the rubber layer has a good sound insulation effect. When the valve body 1 is opened and closed, the fluid passes through the noise reduction tube 3 to fully reduce the noise. The remaining noise can be absorbed and isolated by the first sound insulation layer 4 and the second sound insulation layer 5, which plays an auxiliary noise reduction role. The inner diameter of the inner buffer tube 11 increases from left to right, so that the pressure of the fluid can be effectively reduced when passing through, and the impact is reduced. After a pressure reduction, the fluid enters the first annular channel along the arc bottom 15 and passes through The cross-sectional size of the first annular channel is larger than the cross-sectional size of the inner diameter of the third tube body 1103 and the cross-sectional size of the first annular channel is smaller than the cross-sectional size of the second annular channel. When the fluid passes through, secondary pressure reduction is formed. When the fluid flows into the noise reduction tube 3 from the second annular channel, the flowable cross-sectional size continues to increase, forming a third pressure reduction. After three sufficient pressure reductions, the fluid velocity is reduced, reducing the impact on the pipeline and achieving the purpose of noise reduction. The noise generated by the fluid entering the noise reduction tube 3 is partially absorbed by multiple groups of silencer holes 7 after noise reduction, thereby improving the noise reduction effect.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve for reducing valve opening and closing noise, characterized in that: The invention comprises a valve body (1) and a noise reduction pipe (3) arranged at the outlet end of the valve body (1) via a connecting flange (2), wherein the outer wall of the noise reduction pipe (3) is provided with a first sound insulation layer (4) and a second sound insulation layer (5) in sequence from the inside to the outside, and a baffle (8) is fixedly connected to the inner wall of the noise reduction pipe (3) and one end close to the valve body (1), and the inner wall of the baffle (8) is provided with a water inlet hole (9) which is through-through from left to right, and an inner buffer pipe (11) is fixedly connected to the side of the baffle (8) away from the valve body (1) via a fixing plate (10), and the inner buffer pipe (11) is fixedly connected to the inner wall of the noise reduction pipe (3). The inner cavity (11) is opposite to the water inlet hole (9) on the left and right. The inner buffer tube (11) is composed of a first tube body (1101), a second tube body (1102) and a third tube body (1103) which are distributed on the left and right. The outer wall of the inner buffer tube (11) and the end located away from the baffle (8) are fixedly connected to the outer buffer tube (14) through multiple groups of first brackets (12) and second brackets (13). The inner wall of the noise reduction tube (3) and the inner wall located on the right side of the baffle (8) are fixedly connected to the inner liner layer (6). The inner wall of the inner liner layer (6) is provided with a sound-absorbing structure.

2. A valve for reducing valve opening and closing noise according to claim 1, characterized in that: The first tube body (1101) and the second tube body (1102) as well as the second tube body (1102) and the third tube body (1103) are connected via a conical tube, and the inner diameter of the second tube body (1102) is larger than the inner diameter of the first tube body (1101) and smaller than the inner diameter of the third tube body (1103).

3. A valve for reducing valve opening and closing noise according to claim 1, characterized in that: A first annular channel is formed between the inner wall of the outer buffer tube (14) and the outer wall of the third tube body (1103), and a second annular channel is formed between the outer wall of the outer buffer tube (14) and the inner wall of the inner liner layer (6). The cross-sectional size of the first annular channel is larger than the cross-sectional size of the inner cavity of the third tube body (1103), and the cross-sectional size of the first annular channel is smaller than the cross-sectional size of the second annular channel.

4. A valve for reducing valve opening and closing noise according to claim 1, characterized in that: The noise reduction structure comprises a plurality of groups of noise reduction holes (7), wherein the plurality of groups of noise reduction holes (7) are all arranged on the inner side wall of the inner liner layer (6), and the axes of the plurality of groups of noise reduction holes (7) are all perpendicular to the axis of the inner liner layer (6).

5. A valve for reducing valve opening and closing noise according to claim 1, characterized in that: An arc bottom (15) is provided at one end of the outer buffer tube (14) away from the baffle (8), and the arc radius of the arc bottom (15) is consistent with the radius of the outer buffer tube (14).

6. A valve for reducing valve opening and closing noise according to claim 1, characterized in that: The first sound insulation layer (4) is sound-absorbing cotton.

7. A valve for reducing valve opening and closing noise according to claim 1, characterized in that: The second sound insulation layer (5) is a rubber layer.

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