Counterweight type flood prevention breather valve

Abstract

The utility model relates to valve technical field especially is involved in a kind of counterweight formula anti-overflow breathing valve, including valve body, valve core subassembly and anti-overflow subassembly, gas passage is equipped in valve body interior, valve core subassembly is used to block or communicate gas passage, anti-overflow subassembly includes mounting seat, breather cap and anti-overflow valve flap, breather cap is connected with valve body, and breather cap will mounting seat abutment setting in valve body, mounting seat is connected with sleeve, anti-overflow valve flap is movably arranged between breather cap and mounting seat, and anti-overflow valve flap includes plug-in part and sealing portion, sleeve is equipped with the through hole compatible with plug-in part, breather cap is equipped with the air hole that communicates with gas passage, when sealing portion and mounting seat abutment, air hole and gas passage block, and plug-in part is inserted into sleeve along through hole, the utility model restricts the activity path of anti-overflow valve flap by sleeve, ensure that anti-overflow valve flap is normally opened and closed, and sealing effect is also better simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a counterweight anti-overflow breather valve. Background Technology

[0002] A breather valve is a valve that ensures the storage tank is isolated from the atmosphere within a certain pressure range, while allowing it to breathe 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 to reduce evaporation losses of the stored liquid. Installing a breather valve not only reduces gas emissions from the tank, thus lowering atmospheric pollution, but also prevents damage from overpressure or instability from excessive vacuum, contributing to both safety and environmental protection. For example, breather valves are installed on oil tankers to adjust the pressure difference between the inside and outside of the tank.

[0003] Existing breather valves are usually installed on the top of the tank to balance the pressure difference between the inside and outside of the tank. If the tank tipps over, the breather valve can also prevent the tank from leaking. However, the overflow prevention structure on the existing breather valve has some drawbacks. For example, the overflow prevention structure usually uses a hemispherical seal, which has poor sealing effect and does not have a device to restrict the movement path of the overflow prevention structure. If the tank tipps over quickly, the overflow prevention structure may not be able to close properly, and there is still a risk of leakage.

[0004] The purpose of this invention is to propose corresponding solutions to the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a counterweight anti-overflow breather valve. This invention restricts the movement path of the anti-overflow valve disc through a sleeve, ensuring the normal opening and closing of the anti-overflow valve disc, while also providing a better sealing effect.

[0006] The technical solution adopted by this utility model is as follows: a counterweight anti-overflow breather valve, including a valve body, a valve core assembly, and an anti-overflow assembly. The valve body has a gas channel inside. The valve core assembly is used to block or connect the gas channel. The anti-overflow assembly includes a mounting base, a vent cover, and an anti-overflow valve disc. The vent cover is connected to the valve body, and the vent cover abuts against the mounting base inside the valve body. The mounting base is connected to a sleeve. The anti-overflow valve disc is movably disposed between the vent cover and the mounting base. The anti-overflow valve disc includes a plug-in part and a sealing part. The sleeve has a through hole adapted to the plug-in part. The vent cover has a vent hole communicating with the gas channel. When the sealing part abuts against the mounting base, the vent hole blocks the gas channel, and the plug-in part extends into the sleeve along the through hole.

[0007] The anti-overflow assembly also includes a counterweight ball core, which is movably disposed inside the sleeve. When the sealing part is far away from the mounting base, the vent hole is connected to the gas channel, and the counterweight ball core presses down on the insertion part towards the vent cover.

[0008] The sleeve is fixed inside the mounting base by a connecting rod, and the sleeve is coaxial with the mounting base.

[0009] The overflow prevention assembly also includes a compression spring. The other side of the overflow prevention valve disc corresponding to the insertion part is provided with a recess. One end of the compression spring abuts against the inner wall of the recess and the other end abuts against the vent cover.

[0010] The anti-overflow valve disc is also provided with a clearance portion for the sleeve to extend into.

[0011] The mounting base is also provided with a sealing ring that seals with the sealing part.

[0012] One end of the valve body is provided with a first thread, and the valve body is threadedly connected to the vent cover through the first thread.

[0013] The valve core assembly is disposed inside the valve body, and the valve body also has a valve seat. The valve core assembly includes a positive pressure valve disc, a negative pressure valve disc, a positive pressure spring, a negative pressure spring, and a valve stem. The positive pressure valve disc is sealed to the valve seat, and the negative pressure valve disc is sealed to the end face of the positive pressure valve disc near the valve seat. The positive pressure valve disc has a connecting hole along the axial direction, and a gap is formed between the negative pressure valve disc and the valve seat. The positive pressure spring is abutted between the inner wall of the valve body and the positive pressure valve disc. The valve stem passes through the positive pressure valve disc and connects to the negative pressure valve disc, and a plug is provided at the end of the valve stem away from the negative pressure valve disc. The negative pressure spring is sleeved on the outside of the valve stem, and one end of the negative pressure spring abuts against the plug and the other end abuts against the positive pressure valve disc.

[0014] One end of the mounting base abuts against the valve seat and the other end abuts against the vent cover, and a sealing ring is provided between the mounting base and the valve seat.

[0015] The valve body has a second thread at one end near the valve core assembly.

[0016] The beneficial effects of this utility model are as follows: This utility model restricts the movement path of the anti-overflow valve disc by using a sleeve. The through hole of the sleeve and the insertion part of the anti-overflow valve disc form an insertion fit. Even when the tank is tilted quickly, the anti-overflow valve disc can move along the path of the sleeve toward the mounting seat until the sealing part abuts against the mounting seat to form a sealing fit. Because the movement path of the anti-overflow valve disc is restricted by the sleeve, the anti-overflow valve disc will not be misaligned or twisted, ensuring the normal opening and closing of the anti-overflow valve disc. At the same time, the sealing effect is also better, greatly reducing the risk of leakage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0018] Figure 1 This is a schematic diagram of the structure of the counterweight anti-overflow breather valve of this utility model; Figure 2 This is a cross-sectional view of the present invention; In the diagram, 1-valve body, 2-gas passage, 3-mounting seat, 4-vent cover, 5-overflow prevention valve disc, 6-sleeve, 7-insertion part, 8-sealing part, 9-through hole, 10-vent hole, 11-counterweight ball core, 12-connecting rod, 13-compression spring, 14-recessed part, 15-relief part, 16-sealing ring, 17-first thread, 18-valve seat, 19-positive pressure valve disc, 20-negative pressure valve disc, 21-positive pressure spring, 22-negative pressure spring, 23-valve stem, 24-connecting hole, 25-gap, 26-insertion part, 27-sealing ring, 28-second thread. Detailed Implementation

[0019] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0020] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0021] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0022] like Figures 1 to 2As shown, this is an embodiment of the present invention. A counterweight-type anti-overflow breathing valve includes a valve body 1, a valve core assembly, and an anti-overflow assembly. The valve body 1 has a gas channel 2 inside. The valve core assembly is used to block or connect the gas channel 2. The anti-overflow assembly includes a mounting base 3, a vent cover 4, and an anti-overflow valve disc 5. The vent cover 4 is connected to the valve body 1, and the vent cover 4 abuts against the mounting base 3 inside the valve body 1. The mounting base 3 is connected to a sleeve 6. The anti-overflow valve disc 5 is movably disposed between the vent cover 4 and the mounting base 3. The anti-overflow valve disc 5 includes a plug-in portion 7 and a sealing portion 8. The sleeve 6 has a through hole 9 adapted to the plug-in portion 7. The vent cover 4 has a vent hole 10 communicating with the gas channel 2. When the sealing portion 8 abuts against the mounting base 3, the vent hole 10 blocks the gas channel 2, and the plug-in portion 7 extends into the sleeve 6 along the through hole 9.

[0023] The beneficial effects of this design are as follows: This utility model restricts the movement path of the overflow prevention valve disc by using a sleeve. The through hole of the sleeve and the insertion part of the overflow prevention valve disc form an insertion fit. Even when the tank is tilted rapidly, the overflow prevention valve disc can move along the path of the sleeve toward the mounting seat until the sealing part abuts against the mounting seat to form a sealing fit. Because the movement path of the overflow prevention valve disc is restricted by the sleeve, the overflow prevention valve disc will not be misaligned or twisted, ensuring the normal opening and closing of the overflow prevention valve disc. At the same time, the sealing effect is also better, greatly reducing the risk of leakage.

[0024] Furthermore, the anti-overflow assembly also includes a counterweight ball core 11, which is movably disposed within the sleeve 6. When the sealing part 8 is far from the mounting base 3, the vent hole 10 is connected to the gas channel 2, and the counterweight ball core 11 presses down on the insertion part 7 towards the vent cover 4.

[0025] The beneficial effects of this design are as follows: a movable counterweight ball core is installed inside the sleeve to press down the insertion part. Under the action of gravity, the counterweight ball core presses down the insertion part until the anti-overflow valve disc abuts against the vent cover. This ensures that the vent hole and gas passage of the breather valve remain connected under normal working conditions. Only when the tank is tilted does the counterweight ball core roll away from the insertion part along the path of the sleeve. Without the downward pressure of the counterweight ball core, the anti-overflow valve disc can move towards the mounting base, improving the stability of the anti-overflow component and preventing the anti-overflow valve disc from being closed arbitrarily. Existing anti-overflow functions mostly use hemispherical seals, which have poor sealing effects. This utility model uses the rolling of the counterweight ball core to control the opening and closing of the anti-overflow valve disc, resulting in a better valve disc sealing effect.

[0026] Furthermore, the sleeve 6 is fixed inside the mounting base 3 by the connecting rod 12, and the sleeve 6 is coaxial with the mounting base 3.

[0027] The advantages of this design are as follows: the sleeve is fixed by the connecting rod, the structure is stable, and it will not affect the gas passage. The movement path of the anti-overflow valve disc is also coaxial with the mounting base. Even if the anti-overflow valve disc rotates, it will not be misaligned or offset, and it can be opened and closed stably.

[0028] In a further configuration, the anti-overflow assembly also includes a compression spring 13. The anti-overflow valve disc 5 has a recessed portion 14 on the other side corresponding to the insertion portion 7. One end of the compression spring 13 abuts against the inner wall of the recessed portion 14, and the other end abuts against the vent cover 4.

[0029] The beneficial effects of this design are as follows: the closing speed of the anti-overflow valve is increased by the compression spring. When the anti-overflow valve is about to close, the compression spring, which is compressed by the counterweight ball core, begins to reset. The compression spring pushes the anti-overflow valve towards the mounting base. The concave part is for the compression spring to be installed. When the anti-overflow valve is in the open state, the end face of the anti-overflow valve can abut against the vent cover, and the compression spring will not be misaligned or dislodged.

[0030] Furthermore, the anti-overflow valve disc 5 is also provided with a clearance portion 15 for the sleeve 6 to extend into.

[0031] The beneficial effects of this design are as follows: the clearance part further restricts the movement path of the anti-overflow valve disc, and the clearance part reduces the volume of the anti-overflow valve disc, making the opening and closing of the anti-overflow valve disc more sensitive and rapid, and the overall structure is more compact.

[0032] Furthermore, the mounting base 3 is also provided with a sealing ring 16 that seals with the sealing part 8.

[0033] The benefits of this design are as follows: the sealing ring effectively increases the sealing performance between the sealing part and the mounting base, and the parts are replaceable, reducing maintenance costs.

[0034] Further, one end of the valve body 1 is provided with a first thread 17, and the valve body 1 is threadedly connected to the vent cover 4 through the first thread 17.

[0035] The advantages of this design are as follows: the first thread can be an internal thread, and the vent cap is connected to the internal thread and installed on the valve body, which makes installation simple and reduces production costs.

[0036] Further, the valve core assembly is disposed inside the valve body 1, and the valve body 1 also contains a valve seat 18. The valve core assembly includes a positive pressure valve disc 19, a negative pressure valve disc 20, a positive pressure spring 21, a negative pressure spring 22, and a valve stem 23. The positive pressure valve disc 19 is sealed to the valve seat 18, and the negative pressure valve disc 20 is sealed to the end face of the positive pressure valve disc 19 near the valve seat 18. The positive pressure valve disc 19 has a connecting hole 24 along its axial direction. A gap 25 is formed between the negative pressure valve disc 20 and the valve seat 18. The positive pressure spring 21 is abutted between the inner wall of the valve body 1 and the positive pressure valve disc 19. The valve stem 23 passes through the positive pressure valve disc 19 and is connected to the negative pressure valve disc 20. The end of the valve stem 23 away from the negative pressure valve disc 20 is provided with a plug 26. The negative pressure spring 22 is sleeved on the outside of the valve stem 23. One end of the negative pressure spring 22 abuts against the plug 26 and the other end abuts against the positive pressure valve disc 19.

[0037] The beneficial effects of this design are as follows: the valve core assembly serves as the basic structure for balancing the internal and external pressure difference in the breather valve. During normal operation, the positive pressure valve disc is pressed against the valve seat by the positive pressure spring to form a sealing fit, while the negative pressure valve disc is pressed against the positive pressure valve disc by the negative pressure spring. The negative pressure valve disc blocks the gap and the connecting hole, and the gas passage is closed. When the breather valve needs to release pressure to the outside, i.e., the gas pressure inside the tank is greater than the external gas pressure, the positive pressure spring is compressed, the positive pressure valve disc moves away from the valve seat, and the gas passage opens. When the breather valve needs to increase pressure internally, i.e., the gas pressure inside the tank is less than the external gas pressure, the negative pressure spring is compressed by the connector inserted into one end of the valve stem, and at the same time, the valve stem drives the negative pressure valve disc away from the positive pressure valve disc, the connecting hole connects with the gap, and the gas passage opens.

[0038] Further configuration: one end of the mounting base 3 abuts against the valve seat 18 and the other end abuts against the vent cover 4, and a sealing ring 27 is provided between the mounting base 3 and the valve seat 18.

[0039] The advantages of this design are as follows: compact installation, with the vent cover, mounting base, and valve seat abutting each other in sequence, resulting in a more streamlined overall structure and a reduction in the volume of the valve body; and improved sealing performance between the valve seat and the mounting base due to the sealing ring.

[0040] As a further feature, the valve body 1 is provided with a second thread 28 at one end near the valve core assembly.

[0041] The advantages of this design are as follows: the second thread is an external thread, and the breather valve can be connected to the interface thread of the tank through the external thread. The threaded connection makes installation more convenient, and the breather valve can be installed internally inside the tank.

[0042] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A counterweight-type anti-overflow breathing valve, comprising a valve body (1), a valve core assembly, and an anti-overflow assembly, wherein the valve body (1) has a gas passage (2) inside, and the valve core assembly is used to block or connect the gas passage (2), characterized in that: The anti-overflow assembly includes a mounting base (3), a vent cover (4), and an anti-overflow valve disc (5). The vent cover (4) is connected to the valve body (1), and the vent cover (4) abuts against the mounting base (3) inside the valve body (1). The mounting base (3) is connected to a sleeve (6). The anti-overflow valve disc (5) is movably disposed between the vent cover (4) and the mounting base (3). The anti-overflow valve disc (5) includes a plug-in part (7) and a sealing part (8). The sleeve (6) is provided with a through hole (9) that matches the plug-in part (7). The vent cover (4) is provided with a vent hole (10) that communicates with the gas channel (2). When the sealing part (8) abuts against the mounting base (3), the vent hole (10) blocks the gas channel (2), and the plug-in part (7) extends into the sleeve (6) along the through hole (9).

2. The counterweight-type anti-overflow breather valve according to claim 1, characterized in that: The anti-overflow assembly also includes a counterweight ball core (11), which is movably disposed inside the sleeve (6). When the sealing part (8) is far away from the mounting base (3), the vent hole (10) is connected to the gas channel (2), and the counterweight ball core (11) presses down on the plug part (7) towards the vent cover (4).

3. The counterweight-type anti-overflow breather valve according to claim 1, characterized in that: The sleeve (6) is fixed inside the mounting base (3) by the connecting rod (12), and the sleeve (6) is coaxial with the mounting base (3).

4. The counterweight-type anti-overflow breather valve according to claim 1, characterized in that: The anti-overflow assembly also includes a compression spring (13). The anti-overflow valve disc (5) has a recessed portion (14) on the other side corresponding to the insertion portion (7). One end of the compression spring (13) abuts against the inner wall of the recessed portion (14), and the other end abuts against the vent cover (4).

5. The counterweight-type anti-overflow breather valve according to claim 1, characterized in that: The anti-overflow valve disc (5) is also provided with a relief part (15) for the sleeve (6) to extend into.

6. The counterweight-type anti-overflow breather valve according to claim 1, characterized in that: The mounting base (3) is also provided with a sealing ring (16) that seals with the sealing part (8).

7. The counterweight-type anti-overflow breather valve according to claim 1, characterized in that: One end of the valve body (1) is provided with a first thread (17), and the valve body (1) is threadedly connected to the vent cover (4) through the first thread (17).

8. The counterweight-type anti-overflow breather valve according to claim 1, characterized in that: The valve core assembly is disposed inside the valve body (1), and the valve body (1) is also provided with a valve seat (18). The valve core assembly includes a positive pressure valve disc (19), a negative pressure valve disc (20), a positive pressure spring (21), a negative pressure spring (22), and a valve stem (23). The positive pressure valve disc (19) is sealed to the valve seat (18), and the negative pressure valve disc (20) is sealed to the end face of the positive pressure valve disc (19) near the valve seat (18). The positive pressure valve disc (19) has a connecting hole (24) along the axial direction. A gap (25) is formed between the valve body (1) and the valve seat (18). The positive pressure spring (21) is abutted between the inner wall of the valve body (1) and the positive pressure valve disc (19). The valve stem (23) passes through the positive pressure valve disc (19) and connects to the negative pressure valve disc (20). The valve stem (23) is provided with a plug (26) at one end away from the negative pressure valve disc (20). The negative pressure spring (22) is sleeved on the outside of the valve stem (23). One end of the negative pressure spring (22) abuts against the plug (26) and the other end abuts against the positive pressure valve disc (19).

9. The counterweight-type anti-overflow breather valve according to claim 8, characterized in that: One end of the mounting base (3) abuts against the valve seat (18) and the other end abuts against the vent cover (4), and a sealing ring (27) is provided between the mounting base (3) and the valve seat (18).

10. The counterweight-type anti-overflow breather valve according to claim 1, characterized in that: The valve body (1) has a second thread (28) at one end near the valve core assembly.

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