Low leakage tank breathing valve with fire retardant and early warning function

Abstract

The utility model discloses a kind of low-leakage storage tank breather valve with flame-retardant and early warning function, it is related to the technical field of breather valve, including breather valve main body, the top of breather valve main body is equipped with rain cover, the inner top wall of rain cover is fixedly connected with limit card seat, the bottom end of limit card seat is connected with filter screen, the bottom of filter screen is fixedly connected with annular seat, the top of breather valve main body side wall is movably sleeved with mounting ring, the inside of mounting ring is provided with air slot, a kind of low-leakage storage tank breather valve with flame-retardant and early warning function of the utility model, by being equipped with the limit card seat of rain cover inner wall, filter screen can be positioned quickly, the mounting ring on the side wall of breather valve main body can be connected with the annular seat of filter screen bottom quickly, filter screen is positioned and fixed, the installation step of filter screen is completed, filter structure is arranged around the pressure valve petal of breather valve main body in this way, to filter flammable substance in tank exhaust steam, avoid fire combustion.

Description

Technical Field

[0001] This utility model relates to the field of breather valve technology, and in particular to a low-leakage breather valve for storage tanks with flame-retardant and early warning functions. Background Technology

[0002] A breather valve is a type of valve that ensures the storage tank space is isolated from the atmosphere within a certain pressure range, while also allowing it to communicate with the atmosphere (breathing) when the pressure exceeds or falls below this range. Its function is to prevent damage to the storage tank due to overpressure or vacuum, and at the same time, it can reduce the evaporation loss of the stored liquid. Installing a breather valve can not only reduce the emission of gas from inside the tank, thereby reducing pollution to the atmosphere, but also prevent the storage tank from being damaged due to overpressure or unstable due to excessive vacuum, thus playing a certain role in promoting safety and environmental protection.

[0003] During use, existing breathing valves release steam from the tank. If the steam contains flammable substances, it can easily ignite upon contact with an open flame, posing a fire risk. Some breathing valves are equipped with filters, but these filters are not replaced or maintained regularly, leading to clogging and reduced exhaust volume, significantly increasing the risk of fire. In addition, the protective mesh at the inlet of the breathing valve is intended to block dust and particulate matter, but it easily accumulates a large amount of dust over time. There is no warning function to prevent this dust from affecting the intake volume, and failure to address this in time will affect the function of the breathing valve. Utility Model Content

[0004] The purpose of this invention is to provide a low-leakage tank breather valve with flame retardant and early warning functions to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-leakage storage tank breather valve with flame retardant and early warning functions, comprising a breather valve body, a rain cover installed on the top of the breather valve body, a limit seat fixedly connected to the inner top wall of the rain cover, a filter screen engaged at the bottom end of the limit seat, an annular seat fixedly connected to the bottom of the filter screen, an installation ring movably sleeved on the top of the side wall of the breather valve body, a slot opened inside the installation ring, two compression springs fixedly connected to the bottom inner wall of the slot, telescopic columns fixedly connected to the top ends of the two compression springs, a timer switch embedded in one side wall of the installation ring, and a warning light installed on the top of the rain cover; An air inlet is provided at one end of the main body of the breathing valve. A protective net is installed at the air inlet. An inclined plate is provided on one side of the bottom of the protective net. An equipment box is installed on the surface of the inclined plate. An air pump is installed on one side of the inner wall of the equipment box. A conduit is installed at the air outlet of the air pump.

[0006] As a preferred embodiment of this utility model, the top of the inner wall of the mounting ring is threadedly connected to the bottom of the outer wall of the annular seat, and the top of the telescopic column is fitted with the bottom of the annular seat.

[0007] Through the above technical solution, the threaded connection can quickly and stably connect the mounting ring and the annular seat. After successful connection, the bottom surface of the annular seat will fit against and compress the telescopic column.

[0008] As a preferred technical solution of this utility model, the timing switch corresponds to the position of one of the telescopic columns.

[0009] With the above technical solution, when the telescopic column descends, its bottom will trigger the toggle button of timer switch one, thus activating timer switch one.

[0010] As a preferred embodiment of this utility model, the warning light is electrically connected to an external power supply via a timer switch.

[0011] With the above technical solution, when the timer switch is turned on, it will trigger the warning light to turn on, and the bright light of the warning light will remind maintenance personnel to replace the filter in time.

[0012] As a preferred embodiment of this utility model, a connecting plate is fixedly connected to one end of the inclined plate, and the top end of the connecting plate is engaged with one side of the bottom end of the protective net.

[0013] The above technical solution uses a connecting plate to connect the inclined plate (i.e., the structure on the inclined plate) to the protective net.

[0014] As a preferred embodiment of this utility model, the air inlet of the air pump is located inside the equipment box, and the outer wall of the equipment box has multiple air inlet holes.

[0015] With the above technical solution, when the air pump is working, it will generate negative pressure inside the equipment box, and outside air will be drawn into the equipment box through multiple air inlets.

[0016] As a preferred embodiment of this utility model, a dust detection alarm is installed on one inner wall of the device box.

[0017] With the above technical solution, the air drawn into the equipment box will be detected by the dust detection alarm inside. If the concentration exceeds the standard, it means that the amount of dust is large and timely cleaning and replacement are required.

[0018] As a preferred embodiment of this utility model, a timer switch is installed at the bottom of the inclined plate, and the air pump is electrically connected to an external power supply through the timer switch.

[0019] With the above technical solution, the timer switch 2 can be pre-set and can be triggered at regular intervals to start the air pump for air extraction detection.

[0020] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, by setting a limiting bracket located on the inner wall of the rain cover, can quickly position the filter screen. The mounting ring on the side wall of the breather valve body can quickly connect with the annular seat at the bottom of the filter screen to position and fix the filter screen, completing the filter screen installation step. In this way, a filter structure is set around the pressure valve disc of the breather valve body to allow flammable substances in the steam in the filter tank to be discharged, preventing fire and combustion. At the same time, when the filter screen is replaced and installed, the telescopic column and timer switch are used to realize the timing function. After the set time is reached, the warning light is triggered. Thus, after each removal, replacement and reinstallation of the filter screen, the timer is triggered, and the warning light is automatically triggered after the next replacement time, ensuring the filtration function of the filter screen and avoiding the risk of fire due to exhaust blockage or poor filtration of flammable components, thus playing a flame-retardant role.

[0021] 2. This utility model, by setting an inclined plate at the bottom of the protective net, in conjunction with the equipment box, and the dust detection alarm, air pump and duct inside the equipment, can trigger the air pump to start at a predetermined time frequency, forming an airflow at the duct and creating negative pressure absorption inside the equipment box. The airflow causes dust to be raised, and the negative pressure sucks the dust in. When the dust concentration reaches the alarm threshold, it indicates that there is too much dust in the protective net. Before it is about to become blocked and fail, timely cleaning and maintenance are required, which plays a role in early warning before damage and failure. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Schematic diagram of the structure at point A; Figure 3 This is a schematic diagram of the structure of the annular seat of this utility model; Figure 4 This is a schematic diagram of the structure of the device box of this utility model.

[0023] In the diagram: 1. Breathing valve body; 2. Rain cover; 3. Limiting seat; 4. Filter screen; 5. Protective net; 6. Inclined plate; 7. Annular seat; 8. Mounting ring; 9. Empty slot; 10. Telescopic column; 11. Timer switch one; 12. Compression spring; 13. Connecting plate; 14. Equipment box; 15. Dust detector alarm; 16. Air pump; 17. Conduit; 18. Timer switch two; 19. Warning light. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1 to 4 This utility model provides a technical solution for a low-leakage storage tank breather valve with flame retardant and early warning functions: Example 1: according to Figure 1 , Figure 2 and Figure 3 As shown, a low-leakage storage tank breather valve with flame retardant and early warning functions includes a breather valve body 1. A rain shield 2 is installed on the top of the breather valve body 1. A limit seat 3 is fixedly connected to the inner top wall of the rain shield 2. A filter screen 4 is engaged at the bottom end of the limit seat 3. The inner layer is made of 304 stainless steel wire mesh with a mesh count of 200 mesh and a pore size of 74μm, which can effectively filter particulate matter and other impurities in the gas. The outer layer is covered with a flame-retardant PTFE (polytetrafluoroethylene) membrane with a thickness of 0.1mm and a flame retardant rating of UL94 V-. Grade 0, it can prevent flammable substances from passing through, and has good chemical stability and high temperature resistance. It can be used in a variety of complex environments, effectively filtering out flammable substances in the steam in the filter canister and reducing the risk of fire. The bottom of the filter screen 4 is fixedly connected to an annular seat 7. The top of the side wall of the breather valve body 1 is movably fitted with an installation ring 8. The inside of the installation ring 8 has a hollow groove 9. The bottom inner wall of the hollow groove 9 is fixedly connected to two compression springs 12. The top of each of the two compression springs 12 is fixedly connected to a telescopic column 10. A timer switch 11 is embedded in one side wall of the installation ring 8. The timer switch 11 adopts an ST3P-C time relay, with a set duration of 500h, approximately 21 days (which can be adjusted according to the actual usage cycle of the filter screen 4). When the filter screen 4 reaches this usage time, the brightness of the warning light 19 is ≥1500cd (visible distance ≥10m), indicating replacement. The top of the rain cover 2 is equipped with a warning light 19.

[0026] The top of the inner wall of the mounting ring 8 is threaded to the bottom of the outer wall of the ring seat 7. The top of the telescopic column 10 fits into the bottom of the ring seat 7. The timer switch 11 corresponds to one of the telescopic columns 10. The warning light 19 is electrically connected to an external power source through the timer switch 11.

[0027] In practical use, this utility model provides a low-leakage tank breather valve with flame-retardant and early warning functions. During the use of the breather valve body 1, when the pressure inside the tank reaches the rated positive exhalation pressure, the pressure valve disc opens, and the steam inside the tank is discharged. To avoid the discharged gas containing flammable components, a filter screen 4 can be installed around the exhaust port. The specific installation steps are as follows: the top of the filter screen 4 is engaged in the limiting seat 3, and then the rain cover 2 is installed. Then, the installation ring 8 is manually pushed to rotate and rise, so that the installation ring 8 is threadedly connected to the annular seat 7. Then, the installation ring 8 is fixed to the side wall of the breather valve body 1 with screws. This completes the initial installation of the filter screen 4. During installation, the bottom of the filter screen 4, specifically the annular seat 7, presses against the telescopic column 10, causing it to descend. This triggers the toggle switch 11 on one side, activating the timer. Once the set time is reached, the warning light 19 is activated. This ensures that the timer is triggered every time the filter screen 4 is removed, replaced, and reinstalled. The warning light 19 illuminates automatically after the next replacement time, guaranteeing the filter screen 4's filtration function and preventing fire risks due to air blockage or poor filtration of flammable components, thus providing flame retardancy.

[0028] Example 2: Based on Example 1, such as Figure 1 and Figure 4 As shown, an air inlet is provided at one end of the breathing valve body 1, and a protective net 5 is installed at the air inlet. An inclined plate 6 is provided on one side of the bottom of the protective net 5. An equipment box 14 is installed on the surface of the inclined plate 6. An air pump 16, model WY-120, with a flow rate Q=15L / min, power 20W, and a suction negative pressure ≥5kPa, is installed on one side of the inner wall of the equipment box 14. The air outlet of the air pump 16 is provided with a conduit 17. A connecting plate 13 is fixedly connected to one end of the inclined plate 6. The top of the connecting plate 13 is engaged with one side of the bottom of the protective net 5. The air inlet of the air pump 16 is located inside the equipment box 14. Multiple air inlets are provided on the outer wall of the equipment box 14. A dust detection alarm 15 is installed on one side of the inner wall of the equipment box 14. A timer switch 18 is installed at the bottom of the inclined plate 6. The air pump 16 is electrically connected to an external power supply through the timer switch 18.

[0029] In practical use, this utility model, a low-leakage tank breather valve with flame retardant and early warning functions, opens the vacuum valve flap when the vacuum inside the tank reaches the rated suction negative pressure during the use of the breather valve body 1, allowing air to enter. Therefore, an air intake port is provided at one end of the breather valve body 1. To prevent foreign objects from entering, a protective net 5 is installed. However, the protective net 5 is prone to dust accumulation over time, affecting the filtration effect and air intake. Therefore, the timer switch 18 triggers the air pump 16 at regular intervals, causing the air pump 16 to draw air from the equipment box 14 and discharge it through the conduit 17. One end of 17 faces the protective net 5, so the exhaust gas will blow up the dust on the protective net 5. At the same time, the dust will be sucked into the negative pressure equipment box 14, so the dusty gas enters the equipment box 14. When there is a lot of dust on the protective net 5, more dust will be blown up and enter the equipment box 14. The dust concentration is sufficient to trigger the dust detection alarm 15. Therefore, when the dust detection alarm 15 alarms, it means that there is a lot of dust on the protective net 5. Before it is about to become blocked and fail, it needs to be cleaned and maintained in time, which serves as an early warning before damage and failure.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

Claims

1. A breather valve for a low-leakage storage tank with flame retardant and early warning functions, comprising a breather valve body (1), characterized in that: The top of the breathing valve body (1) is equipped with a rain cover (2), the inner top wall of the rain cover (2) is fixedly connected to a limit seat (3), the bottom end of the limit seat (3) is engaged with a filter screen (4), the bottom of the filter screen (4) is fixedly connected to an annular seat (7), the top of the side wall of the breathing valve body (1) is movably fitted with an installation ring (8), the inside of the installation ring (8) is provided with a slot (9), the bottom inner wall of the slot (9) is fixedly connected to two compression springs (12), the top of the two compression springs (12) is fixedly connected to a telescopic column (10), a timer switch (11) is embedded in one side wall of the installation ring (8), and a warning light (19) is installed on the top of the rain cover (2). The breathing valve body (1) has an air inlet at one end, and a protective net (5) is installed at the air inlet. An inclined plate (6) is provided on one side of the bottom of the protective net (5). An equipment box (14) is installed on the surface of the inclined plate (6). An air pump (16) is installed on one side of the inner wall of the equipment box (14). A conduit (17) is installed at the outlet of the air pump (16).

2. The low-leakage tank breather valve with flame retardant and early warning functions according to claim 1, characterized in that: The top of the inner wall of the mounting ring (8) is threaded to the bottom of the outer wall of the ring seat (7), and the top of the telescopic column (10) is attached to the bottom of the ring seat (7).

3. A low-leakage storage tank breather valve with flame retardant and early warning functions according to claim 1, characterized in that: The timing switch (11) corresponds to the position of one of the telescopic columns (10).

4. A low-leakage storage tank breather valve with flame retardant and early warning functions according to claim 1, characterized in that: The warning light (19) is electrically connected to an external power supply via a timer switch (11).

5. A low-leakage storage tank breather valve with flame retardant and early warning functions according to claim 1, characterized in that: One end of the inclined plate (6) is fixedly connected to a connecting plate (13), and the top of the connecting plate (13) is engaged with one side of the bottom of the protective net (5).

6. A low-leakage storage tank breather valve with flame retardant and early warning functions according to claim 1, characterized in that: The air inlet of the air pump (16) is located inside the equipment box (14), and the outer wall of the equipment box (14) has multiple air inlets.

7. A low-leakage storage tank breather valve with flame retardant and early warning functions according to claim 1, characterized in that: A dust detection alarm (15) is installed on one inner wall of the equipment box (14).

8. A low-leakage storage tank breather valve with flame retardant and early warning functions according to claim 1, characterized in that: The bottom end of the inclined plate (6) is equipped with a timer switch (18), and the air pump (16) is electrically connected to an external power supply through the timer switch (18).

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