Breather valve sealing device

Abstract

The utility model provides a breather valve sealing device which comprises a valve body, a valve seat arranged at an air inlet of the valve body and a valve plug buckled on the valve seat, and further comprises a frame, the frame is arranged at the end, away from the valve plug, of the valve seat, and the frame is provided with a filtering layer used for filtering impurities. The filtering structure formed by the frame and the filtering layer is installed at the end of the valve seat, dust and impurities in air entering the valve body through the air inlet of the valve body can be effectively filtered out, the possibility that the dust is attached to the valve plug or the valve seat is reduced, the valve plug and the valve seat can keep good contact, and therefore good sealing performance of the valve is kept, and the service life of the valve is prolonged. And meanwhile, pollutants possibly existing in the external air cannot enter the storage tank, and the quality safety of the contents in the storage tank is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of breathing valve technology, and in particular to a breathing valve sealing device. Background Technology

[0002] In many industrial sectors such as petrochemicals, pharmaceuticals, food, and environmental protection, various storage tanks (such as fixed-roof tanks and internal floating-roof tanks) and closed containers are widely used to store liquid materials, especially volatile media. During operation, the internal gas phase space of these tanks and containers will undergo volume changes and pressure fluctuations due to various factors, and the breather valve plays a key role in maintaining the pressure balance inside the tank.

[0003] When the pressure inside the tank rises to the preset safe pressure value, the valve automatically opens to release excess gas to the atmosphere or the recovery system to prevent overpressure. When the vacuum inside the tank increases to the preset safe vacuum value, the valve automatically opens to draw in outside air to balance the pressure. However, when drawing in outside air, because the valve body's air inlet is in contact with the outside for a long time, dust can easily enter the interior and adhere to the valve plug or valve seat, thereby reducing the sealing effect and making leakage more likely. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a breather valve sealing device, which solves the problem that valve plugs or valve seats are easily affected by external impurities in existing technologies.

[0005] According to the embodiments of this utility model, the following technical solution is adopted:

[0006] A breathing valve sealing device includes a valve body, a valve seat disposed at the air inlet of the valve body, and a valve plug fastened to the valve seat. It also includes a frame disposed at the end of the valve seat away from the valve plug, and the frame is provided with a filter layer for filtering impurities.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] In this solution, the filter structure formed by the frame and filter layer is installed at the end of the valve seat. This effectively filters out dust and impurities from the air entering the valve body through the valve body inlet, reducing the possibility of dust adhering to the valve plug or valve seat. This ensures that the valve plug and valve seat maintain good contact, thereby maintaining the good sealing performance of the entire sealing valve. It also ensures that pollutants that may exist in the outside air will not enter the storage tank, thus guaranteeing the quality and safety of the contents of the storage tank.

[0009] Preferably, the inner side of the valve seat is provided with a groove, the frame is slidably disposed in the groove, the valve plug is provided with a mounting rod, the mounting rod passes through the frame, and the mounting rod is also provided with an elastic element, which abuts against the bottom end of the frame.

[0010] Preferably, the elastic element includes a pressure spring and a limiting element. The mounting rod has a mounting groove, and both the pressure spring and the limiting element are located in the mounting groove. The pressure spring abuts against the limiting element, and the limiting element protrudes from the opening of the mounting groove.

[0011] Preferably, the limiting element is a sphere or a wedge-shaped block.

[0012] Preferably, a return spring is provided in the slide groove, and the return spring abuts against the frame.

[0013] Preferably, one end of the slide groove extends through the bottom of the valve seat, and the slide groove is provided with a fixing rod. The frame and the return spring are both sleeved on the fixing rod, and the end of the fixing rod is provided with a limiting block.

[0014] Preferably, the limiting block is a nut, which is threaded to the end of the fixing rod.

[0015] Preferably, the fixing rod is also equipped with a limiting ring. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of an embodiment of the present utility model.

[0017] Figure 2 This is a cross-sectional structural diagram of the valve seat and valve plug in an embodiment of the present invention.

[0018] Figure 3 This is a bottom view of the structure of an embodiment of the present invention.

[0019] In the above attached figures: 1. Valve body; 2. Valve seat; 201. Slide groove; 3. Valve plug; 4. Frame; 401. Filter layer; 5. Mounting rod; 501. Mounting groove; 502. Pressure spring; 503. Limiting element; 6. Fixing rod; 601. Limiting ring; 602. Limiting block; 7. Return spring. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0021] This utility model embodiment proposes a breathing valve sealing device, including a valve body 1, a valve seat 2 disposed at the air inlet of the valve body 1, and a valve plug 3 fastened to the valve seat 2, and also includes a frame 4, which is disposed at the end of the valve seat 2 away from the valve plug 3, and the frame 4 is provided with a filter layer 401 for filtering impurities.

[0022] In the embodiments of this utility model, such as Figure 1 and Figure 3As shown, valve body 1 is connected to the tank. When the vacuum inside the tank increases to the preset safe vacuum value, the valve automatically opens, valve plug 3 separates from valve seat 2, and external air enters the tank through valve seat 2 to balance the pressure. During air intake, due to the filter structure formed by the frame 4 and filter layer 401 at the bottom of valve seat 2, dust and impurities in the air entering the interior of valve body 1 through the air inlet of valve body 1 can be effectively filtered out, reducing the possibility of dust adhering to valve plug 3 or valve seat 2, so that valve plug 3 and valve seat 2 can maintain good contact, thereby maintaining the good sealing performance of the entire sealing valve, and also ensuring that pollutants that may exist in the external air will not enter the storage tank, thus ensuring the quality and safety of the contents of the storage tank.

[0023] Based on the above solutions, such as Figure 2 As shown, a groove 201 is provided on the inner side of the valve seat 2. The frame 4 is slidably disposed in the groove 201. The valve plug 3 is provided with an installation rod 5, which passes through the frame 4. The installation rod 5 is also provided with an elastic element, which abuts against the bottom end of the frame 4. The groove 201 provides a certain sliding distance for the frame 4. The valve plug 3 is connected to the frame 4 through the installation rod 5. When the valve plug 3 is lifted upward, it causes the frame 4 to slide on the groove 201 through the installation rod 5 until the frame 4 slides to the top of the groove 201. At this time, the valve plug 3 will also cause the installation rod 5 to move upward, causing the elastic element to be deformed under pressure and pass through the frame 4. After the frame 4 is no longer limited by the elastic element, it falls to the bottom end of the groove 201 under its own weight, which helps to prevent dust and impurities from accumulating in a fixed position and has a certain self-cleaning effect. When the valve plug 3 and the valve seat 2 close again, the installation rod 5 passes through the frame 4 again, and the elastic element is compressed and returns to the bottom position of the frame 4. The aforementioned elastic element can be a spring sheet.

[0024] Specifically, in order to allow the mounting rod 5 to lift and separate the frame 4 more smoothly, the elastic element includes a pressure spring 502 and a limiting member 503. The mounting rod 5 has a mounting groove 501. The pressure spring 502 and the limiting member 503 are both located in the mounting groove 501, and the pressure spring 502 abuts against the limiting member 503. The limiting member 503 protrudes from the opening of the mounting groove 501. In the initial state, the end of the limiting member 503 protrudes from the mounting groove 501 under the pressure of the pressure spring 502, and the end of the limiting member 503 bears the weight of the frame 4 and the filter layer 401, and will not retract into the mounting groove 501. As the valve plug 3 continues to rise, when the frame 4 is limited, because the limiting member 503 is a ball or a wedge, the arc surface or inclined surface of the limiting member 503 is pressed and retracts into the mounting groove 501 until it is completely retracted into the mounting groove 501, releasing the limitation on the frame 4, and it can fall under its own weight after bypassing the frame 4. When it collides with the bottom of the slide 201, it can shake off the impurities attached to it. The limiting member 503 is preferably a ball, and when a wedge is used, it is necessary to ensure that both the upper and lower ends of the wedge have inclined surfaces so that when the valve plug 3 falls, the limiting member 503 can return to the bottom of the frame 4 again.

[0025] Specifically, such as Figure 2 As shown, a return spring 7 is provided in the slide 201. The return spring 7 abuts against the frame 4. The return spring 7 can help the frame 4 fall downward. When the frame 4 is driven upward by the limiting member 503, the return spring 7 is compressed. The return spring 7 gives the frame 4 an initial force, and after the limiting member 503 retracts into the mounting groove 501, the frame 4 is impacted by the elastic force of the return spring 7 and hits the bottom of the slide 201, reducing the possibility of impurities adhering to the filter layer 401, thereby ensuring the permeability of the filter layer 401.

[0026] Specifically, such as Figure 2 As shown, one end of the slide groove 201 extends through the bottom of the valve seat 2, and the slide groove 201 is provided with a fixing rod 6. The frame 4 and the return spring 7 are both sleeved on the fixing rod 6, and the end of the fixing rod 6 is provided with a limiting block 602. The bottom of the slide groove 201 is hollowed out. At the same time, the frame 4 and the return spring 7 are both installed on the fixing rod 6. The limiting block 602 plays the role of limiting the frame 4. At the same time, the limiting block 602 can be connected to the fixing rod 6 by means of plug-in or other fixing methods, which facilitates the disassembly and maintenance of the frame 4 and the return spring 7 in the future.

[0027] Preferably, the limiting block 602 is a nut, which is threaded to the end of the fixing rod 6. It can be disassembled by simply rotating the nut, and the frame 4 and the return spring 7 can be taken out at the same time.

[0028] Specifically, such as Figure 2As shown, the fixing rod 6 is also provided with a limiting ring 601. The limiting ring 601 shortens the travel of the frame 4 and effectively prevents the return spring 7 from being damaged due to excessive pressure.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A breathing valve sealing device, comprising a valve body (1), a valve seat (2) disposed at the air inlet of the valve body (1), and a valve plug (3) fastened to the valve seat (2), characterized in that, It also includes a frame (4) located at one end of the valve seat (2) away from the valve plug (3), and the frame (4) is provided with a filter layer (401) for filtering impurities.

2. The breather valve sealing device according to claim 1, characterized in that, The valve seat (2) has a groove (201) on its inner side. The frame (4) is slidably disposed in the groove (201). The valve plug (3) is provided with a mounting rod (5). The mounting rod (5) passes through the frame (4). The mounting rod (5) is also provided with an elastic element. The elastic element abuts against the bottom end of the frame (4).

3. The breather valve sealing device according to claim 2, characterized in that, The elastic element includes a pressure spring (502) and a limiting member (503). The mounting rod (5) has a mounting groove (501). The pressure spring (502) and the limiting member (503) are both located in the mounting groove (501), and the pressure spring (502) abuts against the limiting member (503). The limiting member (503) protrudes from the opening of the mounting groove (501).

4. A breather valve sealing device according to claim 3, characterized in that, The limiting element (503) is a sphere or a wedge-shaped block.

5. A breather valve sealing device according to claim 2, characterized in that, A return spring (7) is provided in the slide (201), and the return spring (7) abuts against the frame (4).

6. A breather valve sealing device according to claim 5, characterized in that, One end of the slide groove (201) extends through the bottom of the valve seat (2), and the slide groove (201) is provided with a fixing rod (6). The frame (4) and the return spring (7) are both sleeved on the fixing rod (6), and the end of the fixing rod (6) is provided with a limiting block (602).

7. A breather valve sealing device according to claim 6, characterized in that, The limiting block (602) is a nut and is threaded to the end of the fixing rod (6).

8. A breather valve sealing device according to claim 6, characterized in that, The fixing rod (6) is also provided with a limiting ring (601).

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