A low pressure automatic breathing valve

Abstract

The utility model discloses a low-pressure automatic breathing valve, comprising a shell, a first circulation channel is arranged on one side of the outer wall of the shell, a second circulation channel is arranged on the bottom of the shell, and a flange is fixedly connected to the bottom of the shell; a second valve flap is slidably connected to the top of the outer wall of the fixed column, a plurality of second springs are fixedly connected between the second valve flap and the top inner surface of the shell, a connecting channel is opened on the inner wall of the shell, and a filter assembly is arranged on the first circulation channel; the utility model can filter the depressurized gas in the container through the filter assembly, prevent harmful substances in the gas from entering the atmosphere, and protect the atmospheric environment, and at the same time, it is easy to disassemble the plug-in shell, facilitate the cleaning of the activated carbon plate 1202, reduce the cleaning difficulty, and improve the work efficiency, and at the same time, the shell has a small size, low cost, and a large air circulation range, and can automatically perform breathing depressurization and air intake.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bodies, in particular to a low-pressure automatic breathing valve. Background Art

[0002] A container breathing valve is a device installed on a container or storage tank to balance the pressure inside and outside the container and prevent the container from being damaged due to excessive or low pressure. The breathing valve allows air to flow inside and outside the container to balance the pressure inside and outside. When the pressure inside the container increases (such as the temperature increases causing the liquid to expand), the breathing valve can release excess gas. Conversely, when the pressure inside the container decreases (such as the liquid shrinks or the temperature drops), the breathing valve allows air to enter the container to avoid creating a vacuum.

[0003] The breathing valve acts on different containers. The high-pressure released gas in some containers may contain harmful gases. The current breathing valve can only balance the internal and external air pressures and does not have the function of filtering the released gas, causing harmful gases to enter the atmosphere, causing air pollution and harming the environment. Utility Model Content

[0004] The purpose of the utility model is to provide a low-pressure automatic breathing valve to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A low-pressure automatic breathing valve comprises a shell, a first flow channel is arranged on one side of the outer wall of the shell, a second flow channel is arranged on the bottom of the shell, and a flange is fixedly connected to the bottom of the shell;

[0007] A fixed disk is fixedly connected to the center of the shell, a fixed column is fixedly connected between the fixed disk and the top inner surface of the shell, a first valve flap is slidably connected to the bottom of the outer wall of the fixed column, and a plurality of first springs are fixedly connected between the first valve flap and the fixed disk;

[0008] A second valve flap is slidably connected to the top of the outer wall of the fixed column, a plurality of second springs are fixedly connected between the second valve flap and the top inner surface of the shell, a connecting channel is opened on the inner wall of the shell, and a filter assembly is arranged on the first circulation channel.

[0009] In a preferred embodiment of the present invention, a plurality of air holes are provided on the fixing plate.

[0010] In a preferred implementation manner of the present invention, the first valve flap and the second valve flap are both made of silicone.

[0011] In a preferred embodiment of the present invention, the top end opening of the connecting channel is located above the second valve flap, and the bottom end opening of the connecting channel is located below the first valve flap.

[0012] In a preferred embodiment of the utility model, the filter assembly includes a plug-in shell inserted into the outer wall of the first circulation channel, two activated carbon plates are installed in the center of the plug-in shell, and connecting frames are fixedly connected to the front and back of one side of the plug-in shell, and fixing blocks are penetrated on the two connecting frames, and the outer walls of the two fixing blocks are fixedly connected to mounting plates, and multiple third springs are installed between the two mounting plates and the corresponding connecting frames.

[0013] In a preferred embodiment of the present invention, the inner wall of the plug-in housing is tightly fitted with the outer wall of the first circulation channel.

[0014] In a preferred embodiment of the present invention, the front and rear ends of the first circulation channel are both provided with insertion holes corresponding to the fixing blocks, and the two fixing blocks both pass through the center of the insertion holes.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention.

[0016] The difference from the prior art lies in that: through the setting of the filter component, the depressurized gas in the container can be filtered to prevent harmful substances in the gas from entering the atmosphere, thereby protecting the atmospheric environment. At the same time, it is easy to disassemble the plug-in shell, which facilitates the cleaning of the activated carbon plate 1202, reduces the difficulty of cleaning, and improves work efficiency. At the same time, the shell is small in size, low in cost, and has a large air circulation range, and can automatically perform breathing depressurization and air intake. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is the overall appearance of a low-pressure automatic breathing valve;

[0019] Figure 2 It is a top view of a low-pressure automatic breathing valve;

[0020] Figure 3 Figure 2 Sectional view along AA direction;

[0021] Figure 4 for Figure 2 Cross-sectional view along the BB axis.

[0022] In the figure: 1. shell; 2. first circulation channel; 3. second circulation channel; 4. flange; 5. fixing plate; 501. air vent; 6. fixing column; 7. first valve flap; 8. first spring; 9. second valve flap; 10. second spring; 11. connecting channel; 12. filter assembly; 1201. plug-in housing; 1202. activated carbon plate; 1203. connecting frame; 1204. fixing block; 1205. mounting plate; 1206. third spring. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] Please refer to Figure 1-4A low-pressure automatic breathing valve comprises a shell 1, a first flow channel 2 is arranged on one side of the outer wall of the shell 1, a second flow channel 3 is arranged on the bottom of the shell 1, and a flange 4 is fixedly connected to the bottom of the shell 1; a fixed plate 5 is fixedly connected to the center of the shell 1, and a plurality of air holes 501 are opened on the fixed plate 5; so that the air inside the container can circulate through the air holes 501 and then be discharged through the first flow channel 2, and the outside gas can enter the container through the air holes 501 and the second flow channel 3 after entering through the connecting channel 11, so that the air circulation is realized, and at the same time, the installation of the fixed column 6 is completed, so that the fixed column 6 has a strong installation stability, and the use stability of the first valve flap 7 and the second valve flap 9 is improved, the fixed column 6 is fixedly connected between the fixed plate 5 and the top inner surface of the shell 1, the first valve flap 7 is slidably connected to the bottom of the outer wall of the fixed column 6, and a plurality of first springs 8 are fixedly connected between the first valve flap 7 and the fixed plate 5; the second valve flap 9 is slidably connected to the top of the outer wall of the fixed column 6, and the first valve flap 7 and the second valve flap 9 are both made of silicone; the first valve flap made of silicone 7 and the second valve flap 9 have good high temperature resistance, can maintain stability and elasticity at higher temperatures, and are suitable for working environments that require high temperature resistance. The first valve flap 7 and the second valve flap 9 made of silicone have good corrosion resistance, have good resistance to many chemicals and solvents, and can be used in some corrosive environments. The first valve flap 7 and the second valve flap 9 made of silicone have good softness and elasticity, can effectively seal and adapt to interfaces of different shapes, and improve sealing performance. Silicone is a non-toxic and odorless material that meets food grade safety standards and is suitable for occasions in contact with food or medicine. A plurality of second springs 10 are fixedly connected between the second valve flap 9 and the top inner surface of the housing 1. A connecting channel 11 is opened on the inner wall of the housing 1. The top opening of the connecting channel 11 is located above the second valve flap 9, and the bottom opening of the connecting channel 11 is located below the first valve flap 7; so that when negative pressure is applied, the outside air can enter the connecting channel 11 by squeezing the second valve flap 9, and then can be located at the bottom of the first valve flap 7 through the connecting channel 11, and then enter the center of the container to balance the air pressure.

[0025] like Figure 3 and Figure 4As shown, a filter assembly 12 is provided on the first circulation channel 2, and the filter assembly 12 includes a plug-in shell 1201 inserted into the outer wall of the first circulation channel 2, and the inner wall of the plug-in shell 1201 is tightly fitted with the outer wall of the first circulation channel 2; it can increase the contact area between the plug-in shell 1201 and the first circulation channel 2, improve the stability and reliability of the connection, and reduce the risk of failure caused by looseness, so that the plug-in shell 1201 and the first circulation channel 2 have strong stability after being fixed, thereby ensuring the filtering effect of the activated carbon plate 1202 during filtering, and two activated carbon plates 1202 are installed in the center of the plug-in shell 1201, and a connecting frame 1203 is fixedly connected to the front and back of one side of the plug-in shell 1201, and a fixing block 1204 is penetrated on the two connecting frames 1203, and the front and rear ends of the first circulation channel 2 are provided with jacks corresponding to the fixing blocks 1204, and the two fixing blocks 1204 pass through the center of the jack; so that the two fixing blocks 1204 can pass through the two connecting The connecting frame 1203 is connected to the center of the first circulation channel 2, so that the first circulation channel 2 and the two connecting frames 1203 are fixed, thereby realizing the installation and fixation between the plug-in shell 1201 and the first circulation channel 2, and the gas discharged through the first circulation channel 2 will be adsorbed and filtered by the activated carbon plate 1202, and the outer walls of the two fixed blocks 1204 are fixedly connected with the mounting plates 1205, and multiple third springs 1206 are installed between the two mounting plates 1205 and the corresponding connecting frames 1203; the discharged gas passes through the two activated carbon plates 1202, and the harmful substances in the gas are adsorbed by the activated carbon plates 1202, thereby realizing the filtering function. When cleaning the activated carbon plates 1202 regularly, the two mounting plates 1205 are pulled, and the two fixed blocks 1204 move accordingly until they leave the center of the first circulation channel 2, and the fixation between the first circulation channel 2 and the plug-in shell 1201 is released, and the plug-in shell 1201 can be directly taken out to clean the activated carbon plates 1202 therein.

[0026] The working principle of the utility model is: the flange 4 can be directly connected to the storage container for use; when the internal pressure of the container is too high and reaches the control positive pressure of the breathing valve, the first valve flap 7 moves upward, the first spring 8 is stretched, and the internal gas is discharged through the second circulation channel 3 and the first circulation channel 2; the discharged gas passes through two activated carbon plates 1202, and the harmful substances in the gas are adsorbed by the activated carbon plates 1202, thus realizing the filtering function; after the gas is discharged, the container reaches the normal air pressure, the first spring 8 retracts and drives the first valve flap 7 to reset and seal; when the internal pressure of the container decreases and reaches the control negative pressure of the breathing valve, the first circulation The outside air entering through the channel 2 squeezes the second valve flap 9, causing the second valve flap 9 to move upward, and the second spring 10 is compressed. The outside air enters the container through the connecting channel 11 and the second circulation channel 3 to balance the internal air pressure. The second spring 10 rebounds, driving the second valve flap 9 to reset and achieve sealing. When cleaning the activated carbon plate 1202 regularly, pull the two mounting plates 1205, and the two fixing blocks 1204 move accordingly until they leave the center of the first circulation channel 2, and release the fixation between the first circulation channel 2 and the plug-in shell 1201, and then you can directly take out the plug-in shell 1201 and clean the activated carbon plate 1202 therein.

[0027] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A low-pressure automatic breathing valve, comprising a housing (1), characterized in that: A first circulation channel (2) is provided on one side of the outer wall of the shell (1), a second circulation channel (3) is provided on the bottom of the shell (1), and a flange (4) is fixedly connected to the bottom of the shell (1); A fixed disk (5) is fixedly connected to the center of the housing (1); a fixed column (6) is fixedly connected between the fixed disk (5) and the top inner surface of the housing (1); a first valve flap (7) is slidably connected to the bottom of the outer wall of the fixed column (6); and a plurality of first springs (8) are fixedly connected between the first valve flap (7) and the fixed disk (5); A second valve flap (9) is slidably connected to the top of the outer wall of the fixed column (6); a plurality of second springs (10) are fixedly connected between the second valve flap (9) and the top inner surface of the shell (1); a connecting channel (11) is provided on the inner wall of the shell (1); and a filter assembly (12) is provided on the first circulation channel (2).

2. A low-pressure automatic breathing valve according to claim 1, characterized in that: The fixing plate (5) is provided with a plurality of air holes (501).

3. A low-pressure automatic breathing valve according to claim 1, characterized in that: The first valve flap (7) and the second valve flap (9) are both made of silicone.

4. A low-pressure automatic breathing valve according to claim 1, characterized in that: The top end opening of the connecting channel (11) is located above the second valve flap (9), and the bottom end opening of the connecting channel (11) is located below the first valve flap (7).

5. A low-pressure automatic breathing valve according to claim 1, characterized in that: The filter assembly (12) comprises a plug-in shell (1201) inserted into the outer wall of the first circulation channel (2), two activated carbon plates (1202) are installed in the center of the plug-in shell (1201), a connecting frame (1203) is fixedly connected to the front and rear of one side of the plug-in shell (1201), a fixing block (1204) is provided through the two connecting frames (1203), the outer walls of the two fixing blocks (1204) are fixedly connected to the mounting plates (1205), and a plurality of third springs (1206) are installed between the two mounting plates (1205) and the corresponding connecting frames (1203).

6. A low-pressure automatic breathing valve according to claim 5, characterized in that: The inner wall of the plug-in housing (1201) is tightly fitted with the outer wall of the first circulation channel (2).

7. A low-pressure automatic breathing valve according to claim 5, characterized in that: The front and rear ends of the first circulation channel (2) are both provided with plug holes corresponding to the fixing blocks (1204), and the two fixing blocks (1204) both pass through the center of the plug holes.

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