Mute overflow valve

Abstract

The mute overflow valve comprises an upper cover and a lower valve body matched with the upper cover, a diaphragm is arranged between the upper cover and the lower valve body, an overflow pressure adjusting cavity located above the diaphragm is formed in the upper cover, an input port and an output port located below the diaphragm are formed in the lower valve body, and the diaphragm is arranged in the input port. An overflow pressure adjusting assembly is arranged on the diaphragm and located in the overflow pressure adjusting cavity, the overflow pressure adjusting assembly comprises an adjusting seat at the lowest end, and a limiting groove for limiting the adjusting seat to slide upwards by a certain height is formed in the side wall of the overflow pressure adjusting cavity. By arranging the limiting groove, the upward sliding height of the adjusting seat is limited to be too high, and then the upward movement amplitude of the diaphragm is limited to be too large or too high, so that the distance between the diaphragm and the output port is not too high when the diaphragm moves, and the force of descending and slapping the output port of the diaphragm is limited accordingly; and the noise generated when the diaphragm slaps the side wall of the output port is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of overflow valves, and in particular to an overflow valve capable of reducing overflow valve noise. Background Art

[0002] The overflow valve is a pressure control valve, which maintains a constant pressure in the controlled system or loop through the overflow of the valve port, and realizes the functions of voltage stabilization, voltage regulation or pressure limiting. For example, Chinese patent document CN20457322U discloses a diaphragm-type overflow valve, which includes an upper cover and a main valve body, the main valve body includes an input port and an output port, and an overflow pressure regulating component is arranged in the upper cover, and the overflow pressure regulating component includes a diaphragm; a valve is arranged below the diaphragm, the valve sits directly on the main valve body, the middle of the valve is the output port, the side of the valve is the input port, and a one-way valve is arranged on the side of the output port, the overflow pressure component also includes a spring seat arranged above the diaphragm, a compression spring is arranged above the spring seat, and a pressure block is arranged above the compression spring; an annular area is formed between the bottom of the diaphragm and the top surface of the main valve body. Under the action of air pressure, as the valve port of the above-mentioned diaphragm overflow valve opens, all air pressure will quickly form under the diaphragm, causing the opening height of the diaphragm to rise rapidly. Subsequently, the opening height between the diaphragm and the valve will also rise rapidly. At this time, the output air flow rate increases, causing the air pressure at the input port to decrease. At this time, the diaphragm and the valve are re-fitted. At this time, the air pressure at the input port continues to increase in a closed state, causing the above-mentioned phenomenon to occur repeatedly. In the above-mentioned phenomenon, under the repeated changes in the air pressure at the input port, the diaphragm will repeatedly hit the valve port, causing the diaphragm overflow valve to have a large noise. In addition, due to the repeated changes in the air pressure at the input port, the air pressure at the output port is also in a state of large change, causing the output pressure to be in a state of beating, and a smooth transition cannot be achieved. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a silent overflow valve, comprising an upper cover and a lower valve body adapted to the upper cover, a diaphragm is arranged between the upper cover and the lower valve body, an overflow pressure regulating chamber located above the diaphragm is formed in the upper cover, an input port and an output port located below the diaphragm are formed in the lower valve body, an overflow pressure regulating assembly is arranged above the diaphragm and in the overflow pressure regulating chamber, the overflow pressure regulating assembly comprises an adjustment seat at the bottom, and a limiting groove is formed on the side wall of the overflow pressure regulating chamber to limit the adjustment seat from sliding upward to a certain height. By setting the limiting groove, the adjustment seat is limited to slide upward to a height that is too high, and then the upward movement amplitude of the diaphragm is limited to be too large and too high, so that the distance between the diaphragm and the output port when the diaphragm moves will not be too high, so that when the pressure of the output port and the output port drops, the force of the diaphragm descending and hitting the output port is limited accordingly, reducing the noise of the diaphragm hitting the side wall of the output port.

[0004] In one embodiment, a reflux channel is formed on the side wall of the overflow pressure regulating chamber, and two ends of the reflux channel are respectively connected to the overflow pressure regulating chamber and the output channel after the output port, and a pressure reflux check valve is arranged in the reflux channel; a breathing port is formed on the side wall of the limit groove, and the adjustment seat opens or closes the breathing port when sliding. By setting a reflux channel, as the air pressure is formed at the input port, the diaphragm is lifted. At the same time, the output port is opened, and a part of the air pressure enters the overflow pressure regulating chamber through the output channel, the reflux channel and the pressure reflux one-way valve in the reflux channel. When the breathing port is not closed by the regulating seat, this part of the air pressure is discharged into the atmosphere along the breathing port. As the diaphragm continues to rise, the regulating seat of the breathing port is closed, and this part of the air pressure forms a back pressure on the regulating seat in the overflow pressure regulating chamber, and then forms a back pressure on the diaphragm. In addition, the pressure of the overflow pressure regulating assembly further limits the lifting height of the diaphragm. When the pressure of the input port and the output port drops, the noise of the diaphragm with the limited lifting height falling and hitting the side wall of the output port is further reduced. Furthermore, when the air pressure forms a back pressure on the diaphragm, the lifting process of the diaphragm is made more stable, and this design does not affect the pressure design at the initial stage of diaphragm lifting, that is, it does not affect the exhaust efficiency of the overflow valve. At the same time, through the above design, the back pressure is formed by the reflux of air pressure, which avoids the phenomenon of total waste caused by the total discharge of air pressure.

[0005] In one embodiment, an annular protrusion surrounding the outlet is provided on the lower valve body between the diaphragm and the outlet. By providing the annular protrusion, the structure forms a valve structure, thereby making the opening and closing between the diaphragm and the outlet more sensitive.

[0006] In one embodiment, the central axes of the overflow pressure regulating assembly, the diaphragm, the output port and the annular protrusion coincide with each other.

[0007] In one embodiment, an annular channel located below the diaphragm is formed on the lower valve body around the side wall of the output port, and the input port is communicated with the annular channel.

[0008] In one embodiment, an output pressure one-way valve is disposed in the output channel.

[0009] In one embodiment, the adjustment seat is made of polymer material.

[0010] In one embodiment, the surface of the film is sprayed with an anti-stick coating.

[0011] In one embodiment, the membrane is sandwiched with fiber cloth.

[0012] In one embodiment, the overflow pressure regulating assembly further includes an regulating spring disposed above the regulating seat, a spring pressure seat, and an regulating bolt cooperating with the upper cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the following briefly introduces the drawings required for use in the specific implementation modes. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a structural schematic diagram of the silent overflow valve of the present invention;

[0015] Figure 2 yes Figure 1 A magnified view of middle;

[0016] The reference numerals in the figure are as follows: 1-upper cover; 2-lower valve body; 3-diaphragm; 4-overflow pressure regulating chamber; 5-input port; 6-output port; 7-adjusting seat; 8-limiting groove; 9-reflux channel; 10-output channel; 11-pressure reflux check valve; 12-breathing port; 13-annular protrusion; 14-annular channel; 15-output pressure check valve; 16-adjusting spring; 17-spring pressure seat; 18-adjusting bolt; 19-branch channel. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the content of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The embodiments in the present invention and other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] Example 1

[0022] like Figure 1 and Figure 2 As shown, the present embodiment discloses a silent overflow valve, which comprises an upper cover 1 and a lower valve body 2 adapted to the upper cover 1. Specifically, the upper cover 1 and the lower valve body 2 are detachably connected. A diaphragm 3 is arranged between the upper cover 1 and the lower valve body 2. The arrangement of the diaphragm 3 is not specifically limited. The existing arrangement of the diaphragm 3 between the upper cover 1 and the lower valve body 2 can be adopted or referred to. Specifically, the edge of the diaphragm 3 is clamped between the upper cover 1 and the lower valve body 2 to achieve the fixation of the diaphragm 3. An overflow pressure regulating chamber 4 located above the diaphragm 3 is formed in the upper cover 1, and an input port 5 and an output port 6 located below the diaphragm 3 are formed in the lower valve body. An overflow pressure regulating component is arranged above the diaphragm 3 and in the overflow pressure regulating chamber 4. The structures of the overflow pressure regulating chamber 4, the input port 5 and the output port 6 are not specifically limited. The existing structures can be adopted or referred to. The overflow pressure regulating assembly includes an adjusting seat 7 at the lower end, and a limiting groove 8 is formed on the side wall of the overflow pressure regulating chamber 4 to limit the adjusting seat 7 from sliding upward to a certain height. The structure of the limiting groove 8 is not specifically limited. In this embodiment, the limiting groove 8 is an expanded structure formed at the lower end of the overflow pressure regulating chamber 4. The structure of the adjusting seat 7 is innovated from the existing structure. The simplest way is to expand the existing adjusting seat or spring seat so that it can be used in conjunction with the limiting groove 8.

[0023] In one embodiment, a reflux channel 9 is formed in the side wall of the overflow pressure regulating chamber 4. Specifically, it can be achieved by thickening part of the outer wall of the upper cover 1 and drilling. The two ends of the reflux channel 9 are respectively connected to the overflow pressure regulating chamber 4 and the output channel 10 after the output port 6. As for how to connect the output channel 10 arranged in the lower valve body 2, the specific setting is not limited. In the present embodiment, the connection is achieved through a branch channel 19 arranged in the lower valve body 2. Specifically, the two ends of the branch channel 19 are respectively connected to one end of the reflux channel 9 and the output channel 10; at the same time, a pressure reflux check valve 11 is arranged in the reflux channel. At this time, the reflux channel 9 is divided into two parts, one part is used to install the pressure reflux check valve 11, and the other part is used to connect the overflow pressure regulating chamber 4. At this time, part of the gas pressure entering the output channel 10 through the output port 6 The pressure enters the overflow pressure regulating chamber 4 through the branch channel, the pressure reflux check valve 11, and the reflux channel 9; at the same time, a breathing port 12 is formed on the side wall of the limit groove 8, and the adjusting seat 7 opens or closes the breathing port 12 when sliding. In the present embodiment, the side wall of the adjusting seat 7 and the side wall of the limit groove 8 form an up and down sliding seal, and the structure for realizing the up and down sliding seal can be the adjusting seat 7 itself, or it can be a sealing ring installed on the side wall of the adjusting seat 7; when the adjusting seat 7 slides upward driven by the lifting of the diaphragm 3, the breathing port 12 changes from a fully open state to a half-open state and finally to a closed state. Of course, it may also be only to a half-open state, which is achieved specifically according to the size of the air pressure. When the air pressure at the input port and the output port becomes smaller, the diaphragm 3 drops, and thereby the adjusting seat 7 also drops, so that the breathing port opens, and the pressure accumulated in the overflow pressure regulating chamber 4 will be released. This design is based on the limit groove 7 and the return air pressure to limit the lifting height of the adjustment seat 7, thereby limiting the lifting height of the diaphragm, so that the noise of the diaphragm falling and hitting the lower valve body 2 is reduced, thereby playing a role in noise reduction and silencing. Another advantage of this design is that it does not adjust the initial adjustment pressure, thereby reducing the sensitivity of the overflow valve, but optimizes after the initial air pressure reaches a certain height, solving the problem of excessive noise in the existing overflow valve. At the same time, the return channel will divert part of the air pressure, so that the air pressure in the output channel will not be in a large change, so that the output pressure is close to stability, achieving a smooth transition.

[0024] In one embodiment, an annular protrusion 13 surrounding the output port 6 is provided on the lower valve body 2 between the diaphragm 3 and the output port 6; the central axes of the overflow pressure regulating assembly, the diaphragm 3, the output port 6 and the annular protrusion 13 coincide with each other; an annular channel 14 located below the diaphragm 3 is formed on the lower valve body 2 around the side wall of the output port 6, and the input port 5 is connected to the annular channel 14; an output pressure check valve 15 is provided in the output channel 10; the regulating seat 7 is made of polymer material; an anti-stick coating is sprayed on the surface of the diaphragm 3; a fiber cloth is sandwiched in the middle of the diaphragm 3; the overflow pressure regulating assembly also includes an adjusting spring 16, a spring pressure seat 17 and an adjusting bolt 18 cooperating with the upper cover 1 arranged above the adjusting seat 7.

[0025] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A silent relief valve, characterized in that: It includes an upper cover and a lower valve body adapted to the upper cover, a diaphragm is arranged between the upper cover and the lower valve body, an overflow pressure regulating chamber located above the diaphragm is formed in the upper cover, an input port and an output port located below the diaphragm are formed in the lower valve body, an overflow pressure regulating assembly is arranged above the diaphragm and in the overflow pressure regulating chamber, the overflow pressure regulating assembly includes an adjusting seat at the lower end, and a limit groove is formed on the side wall of the overflow pressure regulating chamber to limit the adjusting seat from sliding upward to a certain height.

2. The silent relief valve according to claim 1, characterized in that: A reflux channel is formed on the side wall of the overflow pressure regulating chamber, and two ends of the reflux channel are respectively connected to the overflow pressure regulating chamber and the output channel after the output port, and a pressure reflux one-way valve is arranged in the reflux channel; a breathing port is formed on the side wall of the limit groove, and the adjustment seat opens or closes the breathing port when sliding.

3. The silent relief valve according to claim 1 or 2, characterized in that: An annular protrusion surrounding the output port is arranged on the lower valve body between the diaphragm and the output port.

4. The silent relief valve according to claim 3, characterized in that: The central axes of the overflow pressure regulating assembly, the diaphragm, the output port and the annular protrusion coincide with each other.

5. The silent relief valve according to claim 1 or 2, characterized in that: An annular channel located below the diaphragm is formed on the lower valve body around the side wall of the output port, and the input port is communicated with the annular channel.

6. The silent relief valve according to claim 2, characterized in that: An output pressure one-way valve is arranged in the output channel.

7. The silent relief valve according to claim 1 or 2, characterized in that: The adjustment seat is made of polymer material.

8. The silent relief valve according to claim 1 or 2, characterized in that: The surface of the membrane is sprayed with an anti-stick coating.

9. The silent relief valve according to claim 1 or 2, characterized in that: Fiber cloth is sandwiched in the middle of the diaphragm.

10. The silent relief valve according to claim 1 or 2, characterized in that: The overflow pressure regulating assembly also includes an regulating spring arranged above the regulating seat, a spring pressure seat and an regulating bolt matched with the upper cover.

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