Mute exhaust valve

Abstract

The utility model discloses a mute exhaust valve which comprises a valve body, a liquid storage cavity and a liquid outlet communicated with the liquid storage cavity are arranged in the valve body; the output end of the liquid inlet pipe is communicated with the liquid storage cavity, and the side part is communicated with a fluid pipeline; the switch valve group is movably arranged in the liquid inlet pipe, and the liquid storage cavity is isolated from or communicated with the liquid inlet pipe; and the exhaust assembly is movably arranged in the fluid pipeline, exhausts gas in the liquid inlet pipe outwards through the fluid pipeline and can isolate the fluid pipeline from the outside. When water gradually gets close to the switch valve set along the input end of the liquid inlet pipe, gas mixed in the water is compressed, when the air pressure reaches a certain value, the exhaust assembly is opened by the gas, the gas can flow out of the fluid pipeline, and when the water acts on the exhaust assembly and the switch valve set, the exhaust assembly seals the fluid pipeline, and the fluid pipeline is closed. The liquid storage cavity and the liquid inlet pipe are communicated through the switch valve set, water enters the liquid storage cavity from the liquid inlet pipe and then is discharged from the liquid outlet, continuous and stable water supply is facilitated, and fluid noise can be greatly relieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a mute exhaust valve. BACKGROUND

[0002] At present, some household appliances such as coffee machine, water dispenser and the like generally use electromagnetic pump to drive water flow output, the output end of electromagnetic pump is intermittently discharged liquid, the discharged liquid has certain pressure, in order to prevent the problem of excessive liquid output pressure, usually a valve body is connected to make the output fluid relatively stable.

[0003] However, at the time of just starting work, there is gas in the liquid passing through the valve body, the gas can strengthen pressure fluctuation, cause uncertain vibration and noise, prone to problems such as intermittent water supply, low water supply rate and the like, influence user's use feeling. UTILITY MODEL CONTENTS

[0004] The utility model aims at at least one of the technical problems existing in the prior art is solved.For this purpose, the utility model provides a mute exhaust valve which is beneficial to continuous and stable water supply and can greatly relieve fluid noise.

[0005] According to the mute exhaust valve of the utility model embodiment, the valve body is provided with the liquid storage cavity, the liquid inlet pipe is provided with the fluid pipeline, the exhaust assembly is movably arranged in the fluid pipeline, can be driven by gas to discharge the gas in the liquid inlet pipe outward through the fluid pipeline and can be driven by water flow to isolate the fluid pipeline and the outside, and the opening and closing valve group is movably arranged in the liquid inlet pipe, can isolate the liquid storage cavity and the liquid inlet pipe or be driven by water flow to connect the liquid storage cavity and the liquid inlet pipe.

[0006] According to the mute exhaust valve of the utility model embodiment, at least has following

[0007] Beneficial effects:

[0008] When water flows into the valve body from the liquid inlet pipe, the water gradually approaches the opening and closing valve group along the input end of the liquid inlet pipe, the gas mixed in the water is compressed, when the air pressure reaches a certain value, the exhaust assembly is opened by the gas, the gas can flow outward from the fluid pipeline, when the water acts on the exhaust assembly and the opening and closing valve group, the pressure of the water acting on the exhaust assembly is greater than the gas pressure and can close the fluid pipeline, the water flow drives the opening and closing valve group to connect the liquid storage cavity and the liquid inlet pipe, the water enters the liquid storage cavity from the liquid inlet pipe and then is discharged from the liquid outlet, which is beneficial to continuous and stable water supply and can greatly relieve fluid noise.

[0009] In some embodiments of the utility model, first communication port that inside passage is divided into inflow section and outflow section with it is equipped in liquid inlet pipe, switch valve group includes first switch spare that is movably arranged in the outflow section and first elastic piece that drives the first switch spare seals the first communication port, second communication port is equipped between the fluid pipeline and the inflow section, exhaust assembly includes second switch spare that is movably arranged in the fluid pipeline and second elastic piece that drives the second switch spare seals the second communication port, the elastic coefficient of second elastic piece is less than the elastic coefficient of first elastic piece, one end of fluid pipeline away from the inflow section is equipped with exhaust pipe, second switch spare can be driven by water flow to seal exhaust pipe.

[0010] In some embodiments of the utility model, the second communication port is provided at the intersection of the inflow section and the fluid pipeline, the inner diameters of the second communication port and the exhaust pipe are both smaller than the inner diameter of the fluid pipeline, the second switch piece includes a valve rod reciprocally moving along the fluid pipeline, the valve rod and the inner circumferential wall of the fluid pipeline have an air gap, and the two ends of the valve rod respectively have a first conical part capable of blocking the second communication port and a second conical part capable of blocking the exhaust pipe.

[0011] In some embodiments of the utility model, a sliding column radially protruding from the first conical part and the second conical part is formed on the valve rod, the air gap is located between the sliding column and the inner circumferential wall of the fluid pipeline, one end of the fluid pipeline away from the inflow section is provided with an internally threaded hole, a bolt piece is threadedly connected to the internally threaded hole, the middle part of the bolt piece is penetrated along the length direction to form the exhaust pipe, and the second elastic piece is a spring piece sleeved on the valve rod and abutting against the sliding column and the bolt piece at both ends.

[0012] In some embodiments of the utility model, the liquid storage cavity and the liquid inlet pipe are arranged in a vertical direction, the liquid outlet is arranged on the side wall of the bottom of the liquid storage cavity, the upper end of the liquid inlet pipe and the upper end of the liquid storage cavity have a height space, and the radial dimension of the liquid storage cavity is greater than the radial dimension of the liquid inlet pipe.

[0013] In some embodiments of the utility model, the liquid inlet pipe is formed on the inner circumferential wall of the liquid storage cavity, and the upper end of the liquid inlet pipe extends to the middle position of the height direction of the liquid storage cavity.

[0014] In some embodiments of the utility model, the switch valve group further includes a rod fixed relative to the valve body, one end of the rod is arranged in the outflow section, the rod and the outflow section have a water flow gap therebetween, and the first elastic piece is arranged between the first switch spare and the end of the rod extending into the outflow section.

[0015] In some embodiments of the utility model, the outflow section includes first flared channel connected with the inflow section and second flared channel connected with the first flared channel, the inner diameter size of the second flared channel is greater than the first flared channel and forms annular step, the rod is circumferentially distributed with a plurality of the web plate abutting against the annular step at its axial interval, the adjacent web plate and the second flared channel define sectorial channel, and the sectorial channel constitutes the water gap.

[0016] In some embodiments of the utility model, the valve body is communicated with pressure relief channel at the side of the outflow section, the junction of the pressure relief channel and the outflow section has pressure relief port, the plug is movably arranged in the pressure relief channel, the plug is connected with the third elastic member driving it to abut against the pressure relief port, the plug and the pressure relief channel have water gap, and the elastic coefficient of the third elastic member is greater than the elastic coefficient of the second elastic member.

[0017] In some embodiments of the utility model, the valve body is provided with end cover member oppositely arranged with the pressure relief channel and the fluid pipeline, the end cover member is formed with the confluence channel connecting the pressure relief channel, the fluid pipeline and the outside.

[0018] Additional aspects and advantages of the utility model will be in part apparent and in part pointed out hereinafter in the description of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0020] Figure 1 It is structural schematic view of one embodiment of the utility model's mute exhaust valve;

[0021] Figure 2 It is Figure 1 It is one sectional schematic view of embodiment;

[0022] Figure 3 It is Figure 1 It is structural exploded schematic view of embodiment;

[0023] Figure 4 It is Figure 1 It is another sectional schematic view of embodiment;

[0024] Figure 5 It is one internal sectional view schematic view of valve body.

[0025] REFERENCE NUMERALS:

[0026] Valve body 100;Liquid storage cavity 110;Liquid outlet 120;Pressure relief channel 130;Pressure relief port 140;Liquid inlet pipe 200;Inlet section 210;Outlet section 220;First flared channel 221;Second flared channel 222;Annular step 223;First communication port 230;Fluid pipe 300;Second communication port 310;Switch valve group 400;First switch piece 410;First elastic piece 420;Rod piece 430;Rib plate 431;Fan-shaped channel 432;Exhaust assembly 500;Second switch piece 510;First conical part 511;Second conical part 512;Sliding column 513;Second elastic piece 520;Bolt piece 600;Exhaust pipe 610;Plug 700;Third elastic piece 710;End cover piece 800;Converging channel 810. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0028] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0029] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0030] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Referring to Figure 1 , Figure 2 and Figure 5 , the utility model discloses a mute exhaust valve, comprising: valve body 100, be equipped with the liquid storage cavity 110 in valve body 100, valve body 100 is equipped with the liquid outlet 120 of communicating with liquid storage cavity 110, liquid inlet pipe 200, be located valve body 100, the output end of liquid inlet pipe 200 communicates liquid storage cavity 110, the lateral portion of liquid inlet pipe 200 is communicated with fluid pipe 300, the one end of fluid pipe 300 away from liquid inlet pipe 200 can communicate with the outside, switch valve group 400, activity is equipped in liquid inlet pipe 200, can with liquid storage cavity 110 and liquid inlet pipe 200 are isolated or be driven by water flow to connect liquid storage cavity 110 and liquid inlet pipe 200, exhaust assembly 500, activity is equipped in fluid pipe 300, can be driven by gas to make the gas in liquid inlet pipe 200 go out to the outside through fluid pipe 300 and can be driven by water flow to make fluid pipe 300 and outside isolated.

[0032] when water flows from liquid inlet pipe 200 into valve body 100, water gradually approaches switch valve group 400 along the input end of liquid inlet pipe 200, the gas mixed in water is compressed, when the air pressure reaches a certain value, exhaust assembly 500 is opened by gas, and the gas can flow out from fluid pipe 300, when water acts on exhaust assembly 500 and switch valve group 400, the pressure of water acting on exhaust assembly 500 is greater than the gas pressure and can close fluid pipe 300, water flow drives switch valve group 400 to connect liquid storage cavity 110 and liquid inlet pipe 200, and water enters liquid storage cavity 110 from liquid inlet pipe 200 and then is discharged from liquid outlet 120, which is beneficial to continuous and stable water supply and can greatly relieve fluid noise.

[0033] Referring to Figure 2 , Figure 3 and Figure 5In some embodiments of the utility model, first communication port 230 is arranged in liquid inlet pipe 200 to divide the internal passage into inflow section 210 and outflow section 220, the switch valve group 400 includes first switch piece 410 arranged in outflow section 220 and first elastic piece 420 for sealing first communication port 230, second communication port 310 is arranged between fluid pipeline 300 and inflow section 210, the exhaust assembly 500 includes second switch piece 510 arranged in fluid pipeline 300 and second elastic piece 520 for sealing second communication port 310, the elastic coefficient of second elastic piece 520 is less than the elastic coefficient of first elastic piece 420, one end of fluid pipeline 300 away from inflow section 210 is provided with exhaust pipe 610, and second switch piece 510 can be driven by water flow to seal exhaust pipe 610.

[0034] It can be understood that water first enters inflow section 210 of liquid inlet pipe 200 to move towards first communication port 230, as water gradually approaches first communication port 230, the gas mixed in water also moves towards first communication port 230 and is compressed, when the gas is compressed to a certain pressure, the gas pressure acts on second switch piece 510 to compress second elastic piece 520, thereby opening second communication port 310, the gas can enter fluid pipeline 300 from inflow section 210 and then be discharged outward from exhaust pipe 610, at this time, water has not reached the position of second communication port 310 and first communication port 230, when water contacts first switch piece 410 and second switch piece 510, water pressure acts on first switch piece 410 and second switch piece 510 respectively, second switch piece 510 continues to move towards exhaust pipe 610 and seals exhaust pipe 610, first switch piece 410 compresses first elastic piece 420 to open first communication port 230, water enters outflow section 220 from first communication port 230, and water is discharged from liquid inlet pipe 200 and then enters liquid storage cavity 110, and the water in liquid storage cavity 110 is discharged from liquid outlet 120.

[0035] Referring to Figure 2 , Figure 3 and Figure 5In some embodiments of the utility model, the second communication port 310 is arranged at the intersection of the inflow section 210 and the fluid pipeline 300, the inner diameter size of the second communication port 310 and the exhaust pipe 610 is less than the inner diameter size of the fluid pipeline 300, the second switch piece 510 includes the valve rod reciprocating along the fluid pipeline 300, the valve rod and the inner circumferential wall of the fluid pipeline 300 have the ventilation gap, and the both ends of valve rod have the first conical part 511 capable of blocking the second communication port 310 and the second conical part 512 capable of blocking the exhaust pipe 610. It can be understood that when the gas acts on the first conical part 511 to push the valve rod to move away from the second communication port 310, the second elastic piece 520 is compressed, but the second conical part 512 does not contact the exhaust pipe 610, the gas can enter the ventilation gap from the second communication port 310, and the gas passing through the ventilation gap is output to the external environment from the exhaust pipe 610, when completing at least partial exhaust, the water continues to act on the first conical part 511 of the valve rod, the valve rod compresses the second elastic piece 520 and moves to make the second conical part 512 block the exhaust pipe 610, at this time, the gas and the water cannot be discharged outward, ensuring that the water can only be input into the outflow section 220, and finally ensuring that the water amount discharged from the liquid outlet 120 is stable enough.

[0036] Referring to Figure 2 and Figure 3 In some embodiments of the utility model, the sliding column 513 radially protruding from the first conical part 511 and the second conical part 512 is formed on the valve rod, the ventilation gap is located between the sliding column 513 and the inner circumferential wall of the fluid pipeline 300, the one end of the fluid pipeline 300 away from the inflow section 210 is provided with the internally threaded hole, the bolt piece 600 is threadedly connected on the internally threaded hole, the middle part of the bolt piece 600 is penetrated along the length direction to form the exhaust pipe 610, and the second elastic piece 520 is the spring piece sleeved on the valve rod and abutting at both ends on the sliding column 513 and the bolt piece 600. It can be understood that the diameter size of the sliding column 513 is slightly less than the inner diameter size of the fluid pipeline 300, so that the valve rod can reciprocate relative to the fluid pipeline 300, the valve rod is not easy to produce radial excursion, the first conical part 511 is ensured to be inserted in the second communication port 310 or the second conical part 512 is ensured to be inserted in the exhaust pipe 610. The exhaust pipe 610 is arranged in the length direction of the bolt piece 600, which facilitates production and manufacturing, the spring piece is sleeved on the valve rod and then is penetrated into the fluid pipeline 300, and then the bolt piece 600 is threadedly connected on the internally threaded hole of the fluid pipeline 300, so that the above structure of the mute exhaust valve is assembled conveniently.

[0037] Referring to Figure 4 and Figure 5In some embodiments of the utility model, the liquid storage cavity 110 and the liquid inlet pipe 200 are arranged along the vertical direction, the liquid outlet 120 is arranged on the side wall of the bottom of the liquid storage cavity 110, the upper end of the liquid inlet pipe 200 is spaced apart from the upper end of the liquid storage cavity 110, and the radial dimension of the liquid storage cavity 110 is greater than the radial dimension of the liquid inlet pipe 200. It can be understood that the water discharged from the upper end of the liquid inlet pipe 200 falls into the liquid storage cavity 110 after passing through the height space. Since the radial dimension of the liquid storage cavity 110 is greater than the radial dimension of the liquid inlet pipe 200, the water pressure drops suddenly, the impact on the liquid outlet 120 can be reduced, the noise can be reduced, and the water output can be stabilized.

[0038] Referring to Figure 4 and Figure 5 In some embodiments of the utility model, the liquid inlet pipe 200 is formed on the inner circumferential wall of the liquid storage cavity 110, and the upper end of the liquid inlet pipe 200 extends to the middle position of the height direction of the liquid storage cavity 110. Among them, the liquid inlet pipe 200 and the valve body 100 are an integral metal structure, which can be obtained by casting or machining, simplifying the manufacturing process.

[0039] Referring to Figure 2 and Figure 3 In some embodiments of the utility model, the switch valve group 400 further comprises a rod member 430 fixed relative to the valve body 100, one end of the rod member 430 extends into the outflow section 220, the rod member 430 and the outflow section 220 have a water flow gap therebetween, and the first elastic member 420 is arranged between the first switch member 410 and the end of the rod member 430 extending into the outflow section 220. When the water flowing upwards pushes the first switch member 410 upwards, the water flows outwards into the liquid storage cavity 110 along the water flow gap after passing through the first communication port 230, and the rod member 430 has a guiding effect on the water flow.

[0040] Referring to Figures 3 to 5 In some embodiments of the utility model, the outflow section 220 comprises a first flared channel 221 connected with the inflow section 210 and a second flared channel 222 connected with the first flared channel 221, the inner diameter of the second flared channel 222 is greater than that of the first flared channel 221 to form an annular step 223, and the rod member 430 is circumferentially distributed with a plurality of rib plates 431 spaced apart along the axial direction of the rod member 430 and abutting against the annular step 223, adjacent rib plates 431 and the second flared channel 222 define a sector-shaped channel 432, and the sector-shaped channel 432 constitutes the water flow gap, which is conducive to forming an orderly water flow and reducing turbulence, thereby further reducing noise.

[0041] Referring to Figure 2 and Figure 3In some embodiments of the utility model, the valve body 100 is communicated with pressure relief channel 130 on the side of the outflow section 220, the junction of pressure relief channel 130 and outflow section 220 has pressure relief port 140, the plug 700 is movably arranged in pressure relief channel 130, the plug 700 is connected with the third elastic member 710 that drives it and abuts at pressure relief port 140, the plug 700 and pressure relief channel 130 have water relief gap between them, the elastic coefficient of third elastic member 710 is greater than the elastic coefficient of second elastic member 520. It needs to be explained that the mute exhaust valve of the utility model is applied to coffee machine or water dispenser and other household appliances, when the output water pressure of household appliances is too high, the water that is discharged from liquid outlet 120 produces reflux, water successively passes through liquid storage cavity 110, outflow section 220, water gap and then pushes open plug 700, water can enter pressure relief channel 130 and be discharged, thereby achieving the effect of pressure relief. Because the elastic coefficient of third elastic member 710 is greater than the elastic coefficient of second elastic member 520, plug 700 will not be pushed open when normal water is discharged.

[0042] Reference Figure 2 In some embodiments of the utility model, in order to further simplify the structure and reduce the number of parts, end cover piece 800 is arranged on valve body 100 and is arranged opposite pressure relief channel 130 and fluid duct 300, and the end cover piece 800 is shaped into a confluence channel 810 that connects pressure relief channel 130, fluid duct 300 and the outside.

[0043] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0044] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, the scope of the utility model is defined by the claims and its equivalents.

Claims

1. A silent exhaust valve characterized by, The utility model relates to a valve body (100) is provided with liquid storage cavity (110) in, valve body (100) is provided with liquid outlet (120) with liquid storage cavity (110) intercommunication, Liquid inlet pipe (200) is arranged in valve body (100), the output end of liquid inlet pipe (200) is communicated with liquid storage cavity (110), the side of liquid inlet pipe (200) is communicated with fluid pipe (300), one end of fluid pipe (300) away from liquid inlet pipe (200) can be communicated with outside, Switch valve group (400) is movably arranged in liquid inlet pipe (200), can insulate liquid storage cavity (110) with liquid inlet pipe (200) or be driven by water flow to connect liquid storage cavity (110) with liquid inlet pipe (200), Exhaust assembly (500) is movably arranged in fluid pipe (300), can be driven by gas to exhaust the gas in liquid inlet pipe (200) through fluid pipe (300) and can be driven by water flow to insulate fluid pipe (300) with outside.

2. The mute exhaust valve according to claim 1, wherein: The first communication port (230) is arranged in the liquid inlet pipe (200) to divide the internal passage into the inflow section (210) and the outflow section (220), the switch valve group (400) comprises the first switch piece (410) movably arranged in the outflow section (220) and the first elastic piece (420) for driving the first switch piece (410) to seal the first communication port (230), the second communication port (310) is arranged between the fluid pipe (300) and the inflow section (210), the exhaust assembly (500) comprises the second switch piece (510) movably arranged in the fluid pipe (300) and the second elastic piece (520) for driving the second switch piece (510) to seal the second communication port (310), the elastic coefficient of the second elastic piece (520) is less than the elastic coefficient of the first elastic piece (420), the exhaust pipe (610) is arranged at one end of the fluid pipe (300) away from the inflow section (210), and the second switch piece (510) can be driven by water flow to seal the exhaust pipe (610).

3. The mute exhaust valve according to claim 2, wherein: The second communication port (310) is arranged at the intersection of the inflow section (210) and the fluid pipe (300), the inner diameters of the second communication port (310) and the exhaust pipe (610) are both less than the inner diameter of the fluid pipe (300), the second switch piece (510) comprises a valve rod reciprocally moving along the fluid pipe (300), the valve rod has an air gap with the inner peripheral wall of the fluid pipe (300), and the two ends of the valve rod are respectively provided with the first conical part (511) capable of blocking the second communication port (310) and the second conical part (512) capable of blocking the exhaust pipe (610). ​ 4. The mute exhaust valve according to claim 3, characterized in that: a sliding column (513) is formed on the valve rod and protrudes radially from the first conical portion (511) and the second conical portion (512), the vent gap is located between the sliding column (513) and the inner circumferential wall of the fluid pipe (300), the end of the fluid pipe (300) away from the inlet section (210) is provided with an internally threaded hole, a bolt member (600) is threadedly connected to the internally threaded hole, the middle portion of the bolt member (600) is penetrated along the length direction to form the exhaust pipe (610), and the second elastic member (520) is a spring member sleeved on the valve rod and abutting against both the sliding column (513) and the bolt member (600).

5. The mute exhaust valve according to claim 1, characterized in that: the liquid storage cavity (110) and the liquid inlet pipe (200) are arranged in the vertical direction, the liquid outlet (120) is arranged on the side wall of the bottom of the liquid storage cavity (110), the upper end of the liquid inlet pipe (200) has a height space with the upper end of the liquid storage cavity (110), and the radial dimension of the liquid storage cavity (110) is greater than the radial dimension of the liquid inlet pipe (200).

6. The mute exhaust valve according to claim 5, characterized in that: the liquid inlet pipe (200) is formed on the inner circumferential wall of the liquid storage cavity (110), and the upper end of the liquid inlet pipe (200) extends to the middle position of the liquid storage cavity (110) in the height direction.

7. The mute exhaust valve according to claim 2, characterized in that: the on-off valve group (400) further comprises a rod member (430) fixed relative to the valve body (100), one end of the rod member (430) extends into the outlet section (220), the rod member (430) and the outlet section (220) have a water flow gap therebetween, and the first elastic member (420) is arranged between the first on-off member (410) and the end of the rod member (430) extending into the outlet section (220).

8. The mute exhaust valve according to claim 7, characterized in that: the outlet section (220) comprises a first flared channel (221) connected to the inlet section (210) and a second flared channel (222) connected to the first flared channel (221), the inner diameter dimension of the second flared channel (222) is greater than that of the first flared channel (221) to form an annular step (223), the rod member (430) is circumferentially distributed with a plurality of web plates (431) abutting against the annular step (223) at intervals along the axial direction, adjacent web plates (431) and the second flared channel (222) define a sector-shaped channel (432) therebetween, and the sector-shaped channels (432) constitute the water flow gap.

9. The mute exhaust valve according to claim 2, characterized in that: The valve body (100) is communicated with a pressure relief channel (130) at the side of the outflow section (220), the pressure relief channel (130) is provided with a pressure relief opening (140) at the junction with the outflow section (220), a plug (700) is movably arranged in the pressure relief channel (130), the plug (700) is connected with a third elastic member (710) for driving the plug (700) to abut against the pressure relief opening (140), the plug (700) and the pressure relief channel (130) are provided with a water leakage gap, and the elastic coefficient of the third elastic member (710) is greater than the elastic coefficient of the second elastic member (520).

10. A silent exhaust valve according to claim 9, wherein: The valve body (100) is provided with an end cover member (800) arranged opposite to the pressure relief channel (130) and the fluid pipe (300), the end cover member (800) is formed with a converging channel (810) for connecting the pressure relief channel (130), the fluid pipe (300) and the outside.

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