Breather valve device for preventing overflow of tank body

Abstract

The utility model discloses a breather valve device for preventing overflow of a tank body, which comprises a connecting elbow, a first flange is arranged at one end of the connecting elbow, the other end of the connecting elbow is connected with one end of a square cavity through a second flange, the other end of the connecting elbow is closed, an upper valve port and a lower valve port are correspondingly arranged on the square cavity, and an upper valve plate is arranged at the upper valve port. An upper valve plate is arranged at the upper valve port, a lower valve plate is arranged at the lower valve port, an upper support and a lower support are correspondingly arranged on the square cavity corresponding to the upper valve port and the lower valve port, guide pipes are fixedly arranged on the upper support and the lower support, guide rods are fixedly arranged on the upper valve plate and the lower valve plate, the guide rods are in sliding fit with the guide pipes, one end of an upper elbow is connected with the square cavity, and the other end of the upper elbow is connected with a reducing pipeline through a third flange; one end of the lower elbow is connected with the square cavity, and the other end of the lower elbow is provided with an air filter screen. The device has a good volatilization inhibition effect on a tank body for storing volatile liquid such as liquor, liquid leakage in the tank is prevented, and loss is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of breathing valves, in particular to a breathing valve device for preventing a tank from overflowing. Background Art

[0002] The breathing valve is a low-pressure protection device used in the petroleum, chemical, natural gas, liquor and other industries. It is installed on the top of the tank and can be used to maintain the pressure balance of the tank, reduce the evaporation loss of volatile liquids in the tank, meet the ventilation requirements of the tank size, and keep the tank from being damaged by overpressure or ultra-vacuum. The breathing valve makes full use of the pressure-bearing capacity of the tank itself to reduce the discharge of the medium. Its principle is to use the weight of the positive and negative pressure valve disc to control the positive exhaust pressure and negative suction pressure of the tank; when the medium is pumped out of the tank, the pressure of the upper gas space in the tank drops, and when the operating negative pressure of the breathing valve is reached, the atmosphere outside the tank will push open the negative pressure valve disc of the breathing valve, allowing the outside gas to enter the tank, so that the pressure in the tank will no longer continue to drop, so that the air pressure inside and outside the tank is balanced to protect the safety of the tank.

[0003] Problems with the prior art: 1. For some containers that are not equipped with an overflow pipe, leakage is likely to occur after the medium fills the container; 2. For some containers containing flammable and explosive fuels or liquor, the medium is likely to evaporate directly into the air; 3. For containers containing liquor, during the process of air stirring to sober up, the splashed liquor is likely to leak from the breathing valve, causing liquor leakage and loss; 4. For containers containing liquor, during the process of air stirring to sober up, due to the overflow of ethanol molecules, it is very dangerous when the ethanol concentration in the air reaches the explosion limit.

[0004] Therefore, how to solve the defects of the above-mentioned prior art has become the direction of efforts of technicians in this field. Summary of the invention

[0005] The purpose of the utility model is to provide a breathing valve device for preventing tank overflow, which can completely solve the shortcomings of the above-mentioned prior art.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A breathing valve device for preventing a tank from overflowing comprises a connecting elbow, a square cavity, an upper elbow, a lower elbow, an external pipe, a reducing pipe and a water holding elbow, wherein one end of the connecting elbow is provided with a first flange, and the other end is connected to one end of the square cavity through a second flange, and the other end of the square cavity is closed, and an upper valve port and a lower valve port are correspondingly provided on the square cavity, an upper valve plate is provided at the upper valve port, and a lower valve plate is provided at the lower valve port, and an upper bracket and a lower bracket are correspondingly provided on the square cavity corresponding to the upper valve port and the lower valve port, a guide pipe is fixedly provided on the upper and lower brackets, a guide rod is fixedly provided on the upper and lower valve plates, and the guide rod and the guide pipe are slidably matched, one end of the upper elbow is connected to the square cavity, and the upper bracket is located in the upper elbow, the other end of the upper elbow is connected to the reducing pipe through a third flange, the reducing pipe is connected to the external pipe through the water holding elbow, one end of the lower elbow is connected to the square cavity, and the lower bracket is located in the lower elbow, and an air filter is installed on the other end of the lower elbow.

[0008] Furthermore, a check valve is installed in one end of the reducer pipe connected to the upper elbow.

[0009] Furthermore, a grille is installed at the air inlet end of the lower elbow.

[0010] Furthermore, the upper elbow and the lower elbow are connected to the square cavity through a flange, and a silicone gasket is provided between the flange and the square cavity.

[0011] Furthermore, a detection port is installed at the bottom of the water holding elbow.

[0012] Furthermore, the connecting elbow, square cavity, upper elbow, lower elbow, external pipe, reducing pipe, water holding elbow, first to third flanges, upper and lower brackets and guide rods are all made of food grade 304 stainless steel.

[0013] Furthermore, silicone sealing rings are provided at the connections between the first to third flanges.

[0014] Furthermore, a silicone sealing ring is provided at the joints between the upper and lower valve plates and the square cavity.

[0015] Compared with the prior art, the utility model has the following beneficial effects: simple structure, reasonable design, low manufacturing cost, better volatilization suppression effect and reduced loss for tanks storing volatile liquids such as alcohol, and can avoid leakage and loss when the liquid in the tank is stirred with compressed air, and can prevent ethanol gas from overflowing and diffusing into the air to reach the explosion limit and cause hidden dangers; for tanks without overflow pipes, it can effectively prevent the liquid level in the tank from being too high, causing leakage of the liquid in the tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 is a schematic diagram of the exhaust of the utility model, wherein the arrows represent the gas flow path;

[0018] Figure 3 is a schematic diagram of the air intake of the utility model, wherein arrows represent the gas flow path;

[0019] Figure 4 It is a schematic diagram of multiple breathing valve devices connected in series;

[0020] In the figure, 1. connecting elbow; 2. square cavity; 3. upper elbow; 4. lower elbow; 5. external pipe; 6. reducing pipe; 7. water holding elbow; 8. first flange; 9. second flange; 10. upper valve plate; 11. lower valve plate; 12. upper bracket; 13. lower bracket; 14. guide tube; 15. guide rod; 16. third flange; 17. check valve. DETAILED DESCRIPTION

[0021] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0022] like Figures 1 to 4 As shown, a breathing valve device for preventing tank overflow comprises a connecting elbow 1, a square cavity 2, an upper elbow 3, a lower elbow 4, an external pipe 5, a reducing pipe 6 and a water-containing elbow 7. One end of the connecting elbow 1 is provided with a first flange 8, and the other end is connected to one end of the square cavity 2 through a second flange 9. The other end of the square cavity 2 is closed. An upper valve port and a lower valve port are correspondingly opened on the square cavity 2. An upper valve plate 10 is provided at the upper valve port, and a lower valve plate 11 is provided at the lower valve port. An upper bracket 12 and a lower bracket 13 are correspondingly provided on the square cavity 2 corresponding to the upper valve port and the lower valve port. The upper and lower brackets 12 and 13 are both fixed with guide tubes 14, the upper and lower valve plates 10 and 11 are both fixed with guide rods 15, and the guide rods 15 and the guide tubes 14 are slidably matched, one end of the upper elbow 3 is connected to the square cavity 2, and the upper bracket 12 is located in the upper elbow 3, the other end of the upper elbow 3 is connected to the reducer pipe 6 through the third flange 16, and the reducer pipe 6 is connected to the external pipe 5 through the water-filling elbow 7, one end of the lower elbow 4 is connected to the square cavity 2, and the lower bracket 13 is located in the lower elbow 4, and the other end of the lower elbow 4 is installed with an air filter (not shown in the figure). The air filter can effectively prevent dust, mosquitoes, etc. in the air from entering the tank body, effectively ensuring the hygiene and cleanliness of the tank.

[0023] In this embodiment, a check valve 17 is installed in one end of the reducer pipe 6 connected to the upper elbow 3 to prevent liquid from flowing back into the breathing valve and pressing the upper valve plate 10, causing the upper valve port to fail to open normally.

[0024] In this embodiment, a grille is installed at the air inlet end of the lower elbow to prevent birds and other creatures from entering.

[0025] In this embodiment, the upper elbow 3 and the lower elbow 4 are connected to the square cavity 2 through a flange, and a silicone gasket (not shown in the figure) is provided between the flange and the square cavity 2 to ensure the airtightness of the device.

[0026] In this embodiment, a detection port (not shown) is installed at the bottom of the water-filling elbow 7. When liquid overflows from the tank, the last part of the liquid will remain in the water-filling elbow 7, and the detection port can be used to detect whether there is liquid overflow from the tank.

[0027] In this embodiment, the connecting elbow 1, square cavity 2, upper elbow 3, lower elbow 4, external pipe 5, reducing pipe 6, water holding elbow 7, first to third flanges 8, 9, 16, upper and lower brackets 12, 13 and guide rod 15 are all made of food grade 304 stainless steel to avoid contamination of the liquid in the tank.

[0028] In this embodiment, silicone sealing rings (not shown in the figure) are provided at the connection between the first to third flanges 8, 9, and 16, and silicone sealing rings (not shown in the figure) are provided at the matching positions of the upper and lower valve plates 10, 11 and the square cavity 2 to ensure the airtightness of the device.

[0029] See also Figure 2 As shown, when in use, the device is connected to the storage tank through the first flange 8. When the liquid level in the storage tank rises, the breathing valve device plays a role in exhausting. Specifically, when liquid is injected into the storage tank, the air space in the tank is compressed, the gas expands, and the excess gas will overflow to maintain the air pressure in the tank. The internal air pressure of the tank body expands outward from the first flange 8 and is injected into the square cavity 2 through the connecting elbow 1. The air pressure in the square cavity 2 expands, pushing the upper valve plate 10 upward, and the gas enters the upper elbow 3 through the upper valve port, passes through the third flange 16 and the check valve 17, and then passes through the reducer pipe 6 and the water elbow 7, and enters the connecting pipe 5. It is passed into a designated container through the connecting pipe 5, and the pressure is released at the designated container. Then the discharged gas is centrally processed. If the tank contains hazardous chemicals or flammable items, this method can effectively reduce environmental pollution and reduce safety risks. When the air pressure in the tank drops, the upper valve plate 10 slowly falls, the upper valve port is closed, and the pressure relief is completed.

[0030] See also Figure 3As shown, when the liquid level in the storage tank drops, the breathing valve device plays an air intake role. Specifically, when the liquid in the storage tank is extracted, since the space in the tank becomes larger, it is necessary to supplement the gas from the outside to balance the air pressure in the tank. The external gas enters through the air inlet of the lower elbow 4, is filtered by the air filter, intercepts some impurities, and enters the lower elbow 4. Due to the internal air pressure of the tank body, air is sucked inward, and the lower valve plate 11 inside the square cavity 2 is sucked up, allowing the external gas to flow in from the lower valve port, pass through the square cavity 2 and the connecting elbow 1 into the tank, and balance the air pressure in the tank. After the air pressure is balanced, the lower valve plate 11 slowly falls, and the lower valve port is closed to complete the air intake.

[0031] See also Figure 4 As shown, in actual production, more than one tank body often uses a breathing valve device, but there are many tank bodies. Some processes use compressed air to stir the liquid in the storage tank to make it evenly mixed, which may cause volatile gas molecules or liquid to overflow; in the production process, sometimes the high liquid level protection of the storage tank disappears, or the inlet valve of the storage tank is not closed tightly, etc., then the liquid in the storage tank will overflow from the breathing valve device. Therefore, the external pipes 5 of the breathing valve devices of all tank bodies can be connected in series on a pipe, and the end of the pipe can be connected to a collection tank. When liquid overflows, the overflowed volatile gas molecules and liquid can be effectively collected to avoid accidents and environmental pollution.

[0032] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various utility model aspects, in the above description of the exemplary embodiments of the utility model, the various features of the utility model are sometimes grouped together into a single embodiment, figure, or description thereof. However, the disclosed method should not be interpreted as reflecting the following intention: the claimed utility model requires more features than the features explicitly stated in each claim. More specifically, as reflected in the following claims, the utility model aspects are less than all the features of the single embodiment disclosed above. Therefore, the claims following the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself serves as a separate embodiment of the utility model.

[0033] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0034] Furthermore, those skilled in the art will appreciate that although some embodiments herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present invention and to form different embodiments.

[0035] It should be noted that the above embodiments illustrate the utility model rather than limit the utility model, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the existence of elements or steps not listed in the claims. The word "one" or "an" before an element does not exclude the existence of multiple such elements. The utility model can be implemented by means of hardware including several different elements and by means of appropriately programmed computers. In a unit claim that lists several devices, several of these devices can be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A breathing valve device for preventing tank overflow, characterized in that: The valve body is connected with the valve core, and the valve body is connected with the valve body through the valve core.

2. The breathing valve device according to claim 1, characterized in that: A check valve is installed in one end of the reducer pipe connected to the upper elbow.

3. The breathing valve device according to claim 1, characterized in that: A grille is installed at the air inlet end of the lower elbow.

4. The breathing valve device according to claim 1, characterized in that: The upper elbow and the lower elbow are both connected to the square cavity through a flange, and a silicone gasket is arranged between the flange and the square cavity.

5. The breathing valve device according to claim 1, characterized in that: A detection port is installed at the bottom of the water holding elbow.

6. The breathing valve device according to claim 1, characterized in that: The connecting elbow, square cavity, upper elbow, lower elbow, external pipe, reducing pipe, water-holding elbow, first to third flanges, upper and lower brackets and guide rods are all made of food-grade 304 stainless steel.

7. The breathing valve device according to claim 1, characterized in that: A silicone sealing ring is provided at the connection between the first to the third flanges.

8. The breathing valve device according to claim 1, characterized in that: A silicone sealing ring is provided at the matching position between the upper and lower valve plates and the square cavity.

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