Micro exhaust valve

Abstract

The present application discloses a trace exhaust valve, comprising a valve body and a floating member, a top column and a flexible sealing member arranged in a valve cavity of the valve body, wherein an exhaust channel is arranged at the top end of the valve body, a liquid inlet is arranged at the bottom end, an opening of the exhaust channel close to the valve cavity is a waist-shaped exhaust port, the waist-shaped exhaust port extends obliquely along the inner side wall of the valve cavity from the low end to the high end, and the high end maintains a predetermined distance from the top wall of the valve cavity; the top column is L-shaped, the floating member is connected to the vertical part of the top column, one end of the flexible seal is connected to the top of the top column, and the other end is connected to the inner side wall of the valve cavity and close to the lower end of the waist-shaped exhaust port, when the floating member floats up, the flexible seal is driven by the horizontal part to gradually seal the waist-shaped exhaust port, and when the floating member falls, the flexible seal is driven by the top column to gradually open the waist-shaped exhaust port, thereby improving the ease of opening and closing the exhaust channel, and at the same time being able to effectively increase the exhaust volume by increasing the exhaust port area.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust valve equipment, in particular to a trace exhaust valve. Background Art

[0002] At present, due to the limitation of its own structure, the maximum diameter of the exhaust port of the micro exhaust valve is generally around 1.6mm, and the exhaust volume is relatively low.

[0003] Under normal pressure (1.0MPa or 1.6MPa), the exhaust volume of the exhaust port of the trace exhaust valve does not affect normal use. However, when the system pressure is high, such as 2.5MPa or 4.0MPa, due to the high internal pressure, the internal and external pressure difference at the exhaust port is large. Even if the air inside the exhaust valve accumulates to the point that the floating part is completely suspended in the internal air, under the action of the maximum torque generated by the gravity of the floating part and the moving component, the exhaust port can only be partially opened. There have even been cases where the exhaust port cannot be opened at all. Summary of the invention

[0004] One advantage of the present invention is that it provides a trace exhaust valve, wherein the opening of the exhaust channel close to the valve cavity is a waist-shaped exhaust port, and at the same time, the floating member in the valve cavity is connected to the flexible seal through a top column, and the other end of the flexible seal is connected to the inner wall of the valve cavity and close to the lower end of the waist-shaped exhaust port. When the floating member floats up, the flexible seal is driven by the top column to move from the lower end to the high end of the waist-shaped exhaust port to gradually seal the waist-shaped exhaust port, and when the floating member falls, the flexible seal is driven by the top column to move from the high end to the low end of the waist-shaped exhaust port to gradually seal the waist-shaped exhaust port, thereby forming a rolling curtain sealing and opening effect, so that the exhaust valve can gradually open and close the exhaust, which not only improves the ease of opening and closing the exhaust channel, but also can effectively increase the exhaust volume by increasing the exhaust port area, and the exhaust channel can be fully opened even under high-pressure conditions (2.5MPa or 4.0MPa).

[0005] One advantage of the present invention is that it provides a trace exhaust valve, in which the floating member and the top column are movably connected. When the liquid level in the valve chamber rises or falls, the floating member pushes up or pulls down the top column accordingly, and then drives the flexible sealing member to gradually close or open the exhaust channel through the top column, so that the buoyancy of the floating member can all act on the flexible sealing member, avoiding the friction loss of the conventional connecting rod structure, thereby effectively improving the sensitivity and reliability of closing and opening the exhaust channel.

[0006] In order to achieve at least one of the above advantages of the present invention, the present invention provides a micro-exhaust valve, comprising a valve body, and a floating member and a top column arranged in a valve cavity of the valve body, wherein the top end of the valve body is provided with an exhaust channel connected to the valve cavity, and the bottom end of the valve body is provided with a liquid inlet connected to the valve cavity, wherein the opening of the exhaust channel close to the valve cavity is a waist-shaped exhaust port, wherein the waist-shaped exhaust port has a lower end and a higher end opposite to each other, and the waist-shaped exhaust port extends obliquely from the lower end to the higher end along the inner side wall of the valve cavity, and the higher end maintains a predetermined distance from the top wall of the valve cavity;

[0007] The valve body is also provided with a flexible seal in the valve cavity, and the top column is L-shaped, having a vertical portion and a horizontal portion, wherein the floating member is connected to the vertical portion, one end of the flexible seal is connected to the top of the top column, and the other end of the flexible seal is connected to the inner wall of the valve cavity and is close to the lower end of the waist-shaped exhaust port, so that when the floating member floats up, the flexible seal can be driven by the horizontal portion to move from the lower end to the high end to gradually seal the waist-shaped exhaust port, and when the floating member falls, the flexible seal can be driven by the top column to move from the high end to the lower end to gradually open the waist-shaped exhaust port.

[0008] According to an embodiment of the present invention, the flexible sealing element is implemented as a flexible rubber sealing strip.

[0009] According to an embodiment of the present invention, the floating element is implemented as a floating ball.

[0010] According to an embodiment of the present invention, the floating member and the top column are movably connected.

[0011] According to an embodiment of the present invention, a dovetail groove is provided on the top of the floating member, and a limiting protrusion is correspondingly provided on the bottom end of the top column, so that the top column can be embedded in the dovetail groove in an upward and downward movable manner through the limiting protrusion.

[0012] According to an embodiment of the present invention, the flexible sealing member is connected to a high end of the vertical portion.

[0013] According to an embodiment of the present invention, the horizontal portion is a curved surface extension structure, and the curved surface extension structure extends toward a side gradually approaching the liquid inlet.

[0014] These and other objects, features and advantages of the present invention will be fully reflected in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic cross-sectional structure diagram of a micro-exhaust valve of a preferred embodiment of the present application when partially opened is shown.

[0016] Figure 2 A schematic cross-sectional structure diagram of a micro-exhaust valve in a preferred embodiment of the present application when fully opened is shown.

[0017] Figure 3 A schematic cross-sectional structure diagram of a micro-exhaust valve in a preferred embodiment of the present application when fully closed is shown. DETAILED DESCRIPTION

[0018] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0019] Those skilled in the art should understand that, in the disclosure of the specification, the orientation or position relationship indicated by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, which 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 orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0020] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0021] refer to Figures 1 to 3 A micro-exhaust valve according to a preferred embodiment of the present invention will be described in detail below, wherein the micro-exhaust valve comprises a valve body 10 and a floating member 20, a top column 30 and a flexible sealing member 40 arranged in a valve cavity 101 of the valve body 10, wherein the floating member 20 is preferably implemented as a floating ball, wherein the top end of the valve body 10 is provided with an exhaust channel 102 connected to the valve cavity 101, and at the same time, the bottom end of the valve body 10 is provided with a liquid inlet 103 connected to the valve cavity 101, which is used to pass liquid into the valve cavity 101, or release the liquid in the valve cavity 101, so that the valve cavity 101 maintains a certain liquid level height (including the liquid level height is 0, that is, there is no liquid in the valve cavity);

[0022] In addition, the opening of the exhaust channel 102 close to the valve cavity 101 is a waist-shaped exhaust port 104, wherein the waist-shaped exhaust port 104 has a relatively low end and a high end, wherein the waist-shaped exhaust port 104 extends obliquely from the low end to the high end along the inner side wall of the valve cavity 101, or extends in an arc shape, which is based on the shape of the inner side wall of the valve cavity 101, that is, the waist-shaped exhaust port 104 is directly formed on the inner side wall of the valve cavity 101, and at the same time, the high end maintains a predetermined distance from the top wall of the valve cavity 101, so as to reserve a space for the flexible seal 40 to completely seal the waist-shaped exhaust port 104;

[0023] In addition, the top column 30 is L-shaped, having a vertical portion 31 and a horizontal portion 32, wherein the floating member 20 is connected to the vertical portion 31, and at the same time, one end of the flexible seal 40 is connected to the top of the top column 30, and the other end of the flexible seal 40 is connected to the inner wall of the valve cavity 101, and is close to the lower end of the waist-shaped exhaust port 104. At the same time, when the floating member 20 floats up, the floating member 20 can drive the flexible seal 40 to move from the lower end to the high end through the horizontal portion 32 to gradually seal the waist-shaped exhaust port 104, and when the floating member 20 falls, the floating member 20 can drive the flexible seal 40 to move from the high end to the lower end through the top column 30 to gradually open the waist-shaped exhaust port 104.

[0024] Specifically, since the opening of the exhaust channel 102 close to the valve cavity 101 is a waist-shaped exhaust port 104, when the floating member 20 drives the flexible seal 40 to move downward through the top column 30, the flexible seal 40 gradually tears open the waist-shaped exhaust port 104 from the inner wall of the valve cavity 101, thereby making it easier to open the exhaust channel 102. Under the action of buoyancy, when the floating member 20 and the top column 30 gradually float up, when the high-pressure airflow inside the valve cavity 101 is discharged, the discharged airflow can produce an automatic alignment and centering effect, so that the flexible seal 40 can automatically align and gradually and completely close the exhaust channel 102.

[0025] Therefore, in the process of the flexible seal 40 closing and opening the exhaust channel 102, the sealing surface of the flexible seal 40 and the waist-shaped exhaust port 104 is relatively gradually fitted and gradually torn apart, thereby forming a rolling curtain-like movement along the sealing surface. This rolling curtain-like movement along the sealing surface makes it easier to open or close the exhaust channel 102, and can also effectively increase the exhaust volume by increasing the area of ​​the exhaust port of the exhaust channel 102 (that is, the waist-shaped exhaust port 104 has a larger area than the conventional circular opening), and the exhaust can be fully opened even under high-pressure conditions of 2.5MPa or 4.0MPa.

[0026] In one embodiment, the flexible sealing member 40 is implemented as a flexible rubber sealing strip, or a flexible rubber sealing belt, or a flexible rubber sealing sheet.

[0027] In one embodiment, the floating member 20 and the top column 30 are movably connected, so that when the liquid level in the valve chamber 101 rises or falls, the floating member 20 pushes the top column 30 to move upward, or pulls the top column 30 to move downward, thereby driving the flexible seal 40 to close or tear open the waist-shaped exhaust port 104. The buoyancy of the floating member 20 (upward process) or the gravity of the floating member 20 and the top column 30 (descending process) can all act on the flexible seal 40, thereby effectively improving the sensitivity and reliability of closing and opening the waist-shaped exhaust port 104 compared to a conventional connecting rod structure (with a certain amount of friction loss).

[0028] Further preferably, a dovetail groove 201 is provided at the top of the floating member 20, and a limiting protrusion 33 is correspondingly provided at the bottom end of the top column 30, so that the top column 30 can be embedded in the dovetail groove 201 in an upward and downward movable manner through the limiting protrusion 33.

[0029] Further preferably, the flexible sealing member 40 is connected to a high end of the vertical portion 31 .

[0030] In one embodiment, the horizontal portion 32 is an arc-surface extension structure, and at the same time, the arc-surface extension structure extends toward a side gradually approaching the liquid inlet 103, so that the flexible seal 40 can be effectively protected in the process of moving the flexible seal 40, and it is not easy to generate hard contact and hard friction with the flexible seal 40, thereby ensuring the sealing reliability of the flexible seal 40 and extending the service life of the flexible seal 40.

[0031] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The advantages of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A micro exhaust valve, comprising a valve body, a floating member and a top column arranged in a valve cavity of the valve body, wherein the top end of the valve body is provided with an exhaust channel connected to the valve cavity, and the bottom end of the valve body is provided with a liquid inlet connected to the valve cavity, characterized in that: The opening of the exhaust passage close to the valve cavity is a waist-shaped exhaust port, wherein the waist-shaped exhaust port has a lower end and a higher end opposite to each other, and the waist-shaped exhaust port extends obliquely along the inner side wall of the valve cavity from the lower end to the higher end, and the higher end maintains a predetermined distance from the top wall of the valve cavity; The valve body is further provided with a flexible seal in the valve cavity, the top column is L-shaped, and has a vertical portion and a horizontal portion, wherein the floating member is connected to the vertical portion, one end of the flexible seal is connected to the top of the top column, and the other end of the flexible seal is connected to the inner wall of the valve cavity and is close to the lower end of the waist-shaped exhaust port, so that when the floating member floats up, the flexible seal can be driven by the horizontal portion to move from the lower end to the higher end to gradually seal the waist-shaped exhaust port, and when the floating member falls, the flexible seal can be driven by the top column to move from the higher end to the lower end to gradually open the waist-shaped exhaust port; The flexible sealing member is implemented as a flexible rubber sealing strip, and the floating member and the top column are movably connected.

2. The micro exhaust valve according to claim 1, characterized in that: The float is implemented as a float ball.

3. The micro exhaust valve according to claim 1, characterized in that: A dovetail groove is provided on the top of the floating member, and a limiting protrusion is correspondingly provided on the bottom end of the top column, so that the top column can be embedded in the dovetail groove in an upward and downward movable manner through the limiting protrusion.

4. The micro-exhaust valve according to claim 1, characterized in that: The flexible seal is connected to the high end of the vertical portion.

5. The micro-exhaust valve according to claim 4, characterized in that: The horizontal portion is a curved surface extension structure, and the curved surface extension structure extends toward a side gradually approaching the liquid inlet.

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