Pre-charge breathing check valve

Abstract

The utility model discloses a kind of pre-pressing type breathing check valve, comprising: valve seat, valve body, first gasket and elastic assembly;Valve seat inside is equipped with gas passage, top is equipped with first air hole;Valve body is set to the top of valve seat, and second air hole is opened in valve body;First gasket is set between valve body and valve seat, and first gasket includes gasket and support pad, and support pad is located in the middle of gasket bottom end;Gasket seals second air hole, and spacing is left between the bottom of gasket and valve seat;Elastic assembly includes: spring, fixed rod and lock nut;The bottom of fixed rod is sequentially penetrated valve body, first gasket, and is connected with valve seat;Spring is sleeved in the outside of valve seat, and is placed in the top of valve body;Lock nut is connected with fixed rod, and spring is pressed tightly;First gasket is sleeved in the outside of fixed rod.The breathing check valve in the utility model compared with traditional exhaust valve, sealing property and exhaust capacity have been effectively promoted.

Description

Technical Field

[0001] This utility model relates to the field of one-way valve technology, and more specifically to a pre-pressurized breathing one-way valve. Background Technology

[0002] Breathing check valves are typically installed inside the air filter connector and located in the tank or pipeline to perform venting. When pressure is applied to the valve chamber, the valve body is pushed open, disengaging from the valve seat, thus allowing venting. Existing breathing check valves, during venting, have relatively conventional gasket and valve seat structures and sealing methods, resulting in limited venting capacity. Furthermore, traditional venting valves often employ a planar seal, whose sealing performance needs improvement.

[0003] Therefore, developing a pre-pressurized breathing check valve with good sealing performance and strong exhaust capacity is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a pre-pressurized breathing one-way valve with good sealing performance and strong exhaust capacity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pre-pressurized breathing check valve, comprising:

[0007] A valve seat, wherein a gas passage is provided inside the valve seat and a first vent hole is provided at the top;

[0008] A valve body is disposed above the valve seat, and a second vent hole is provided on the valve body;

[0009] A first sealing gasket is disposed between the valve body and the valve seat. The first sealing gasket includes a gasket and a support gasket, with the support gasket located at the middle of the bottom end of the gasket. The gasket closes the second vent hole, and a gap is left between the bottom of the gasket and the valve seat.

[0010] An elastic component includes a spring, a fixing rod, and a locking nut; the bottom of the fixing rod passes through the valve body and a first sealing gasket in sequence, and is connected to the valve seat; the spring is sleeved on the outside of the valve seat and placed on the top of the valve body; the locking nut is connected to the fixing rod and presses the spring; the first sealing gasket is sleeved on the outside of the fixing rod.

[0011] Preferably, the top of the valve seat extends upward along its circumference to form an annular flange, and the valve body is located within the cavity formed by the flange surrounding the top of the valve seat.

[0012] Preferably, the bottom surface of the valve body is recessed inward to form a sealing cavity, and the first sealing gasket is placed inside the sealing cavity.

[0013] Preferably, a second sealing gasket is provided on the top of the valve seat, the top of the second sealing gasket is sealed to the valve body, and a third vent hole is provided on the surface of the second sealing gasket, which is connected to the first vent hole.

[0014] Preferably, a receiving groove for accommodating the spring is provided at the connection point between the top of the valve body and the spring.

[0015] Preferably, the spring is provided with a spring cover at the top, the fixing rod passes through the spring cover, and the locking nut presses the spring cover.

[0016] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a pre-pressurized breathing one-way valve, the beneficial effects of which are:

[0017] 1) Through the gasket and support structure of the first sealing gasket, combined with the double sealing of the second sealing gasket, gas leakage is effectively prevented, and the sealing performance is effectively improved compared with the traditional structure;

[0018] 2) Achieves smoother exhaust under small volume conditions, thus improving exhaust capacity;

[0019] 3) The spring preload can be easily adjusted by tightening the lock nut, and different opening pressures can be set, making it suitable for various working conditions. Attached Figure Description

[0020] 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 The attached figure is a schematic diagram of the structure of the breathing one-way valve provided by this utility model;

[0022] Figure 2 The attached figure is a structural schematic diagram of the breathing one-way valve provided by this utility model in the inhalation state;

[0023] Figure 3 The attached figure is a structural schematic diagram of the one-way breathing valve provided by this utility model in the exhaust state.

[0024] In the figure,

[0025] 1-Valve seat; 11-First vent hole; 12-Flange; 2-Valve body; 21-Second vent hole; 22-Sealing cavity; 23-Receiving groove; 3-First sealing gasket; 31-Gasket; 32-Supporting pad; 4-Elastic component; 41-Spring; 42-Fixing rod; 43-Locking nut; 44-Spring cover; 5-Second sealing gasket; 51-Third vent hole. Detailed Implementation

[0026] 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.

[0027] like Figures 1 to 3 As shown, this utility model embodiment discloses a pre-pressurized breathing one-way valve, comprising:

[0028] Valve seat 1, with a gas passage inside and a first vent hole 11 at the top;

[0029] Valve body 2 is located above valve seat 1, and a second vent hole 21 is provided on valve body 2;

[0030] The first sealing gasket 3 is disposed between the valve body 2 and the valve seat 1. The first sealing gasket 3 includes a gasket 31 and a support gasket 32. The support gasket 32 ​​is located in the middle of the bottom end of the gasket 31. The gasket 31 closes the second vent hole 21, and there is a gap between the bottom of the gasket 31 and the valve seat 1.

[0031] The elastic component 4 includes a spring 41, a fixing rod 42, and a locking nut 43. The bottom of the fixing rod 42 passes through the valve body 2 and the first sealing gasket 3 in sequence and is connected to the valve seat 1. The spring 41 is sleeved on the outside of the valve seat 1 and is placed on the top of the valve body 2. The locking nut 43 is connected to the fixing rod 42 and presses the spring 41. The first sealing gasket 3 is sleeved on the outside of the fixing rod 42.

[0032] like Figure 1 As shown, the gasket 31 and the support pad 32 are an integrated rubber sealing structure. The gasket 31 can deform under the action of airflow to open the second vent 21 and realize the exhalation function.

[0033] The valve seat 1 is used to connect to the oil tank or pipeline, serving as a fixed support structure for gas entry and exit. The structure of the first sealing gasket 3 ensures that, in the sealed state, the gasket 31 can effectively seal the second vent 21, while when the valve body 2 is lifted, gas can be exhausted through the gap between the bottom of the gasket 31 and the valve seat 1.

[0034] When spring 41 is compressed, its downward force presses valve body 2 against valve seat 4, causing the gasket 31 of the first sealing gasket 3 to tightly seal the second vent hole 21, forming an initial seal. When the internal pressure of the oil tank rises to a set value, the gas pressure pushes valve body 2 upward against the force of spring 41, separating the second sealing gasket 5 from valve body 2. Gas enters the space between valve body 2 and valve seat 1 through the first vent hole 11, and then exits through the gap between valve body 2 and flange 12, achieving the exhaust function. When a negative pressure is generated inside the oil tank, external gas enters through the second vent hole 21, pressing the gasket 31 downward, releasing the seal between the gasket 31 and valve body 2. Gas enters the space between valve body 2 and valve seat 1, and then passes through the third vent hole 51 and the first vent hole 11 in sequence, achieving the intake function.

[0035] In one embodiment, an annular flange 12 extends upward along its circumference from the top of the valve seat 1, and the valve body 2 is located within the cavity formed by the flange 12 surrounding the top of the valve seat 1. This flange 12 structure guides the vertical movement of the valve body 2, preventing it from tilting and ensuring reliable sealing.

[0036] In one embodiment, the bottom surface of the valve body 2 is recessed inward to form a sealing cavity 22, and the first sealing gasket 3 is placed inside the sealing cavity 22.

[0037] In one embodiment, a second sealing gasket 5 is provided on the top of the valve seat 1, and the top of the second sealing gasket 5 is sealed to the valve body 2. A third vent hole 51 communicating with the first vent hole 11 is opened on the surface of the second sealing gasket 5. As an auxiliary sealing structure, the second sealing gasket 5 provides double sealing protection when the valve body 2 falls back, further preventing gas leakage.

[0038] In one embodiment, a receiving groove 23 for accommodating the spring 41 is provided at the connection point between the top of the valve body 2 and the spring 41. The receiving groove 23 can stabilize the lower end position of the spring 41 and prevent the spring 41 from radially shifting or twisting during operation.

[0039] In one embodiment, a spring cover 44 is provided on the top of the spring 41, a fixing rod 42 passes through the spring cover 44, and a locking nut 43 presses the spring cover 44. The spring cover 44 can evenly distribute the pressure applied by the locking nut 43, making the spring 41 more evenly stressed, and at the same time facilitating the assembly and adjustment of the preload of the spring 41.

[0040] Working principle:

[0041] Initial state (e.g.) Figure 1 As shown): Spring 41 is pre-tightened by locking nut 43, pressing valve body 2 onto valve seat 1. Gasket 31 of first sealing gasket 3 seals second vent hole 21, and one-way valve is in closed state.

[0042] Inhalation state (e.g.) Figure 2 As shown): When a negative pressure is generated inside the oil tank, external gas enters through the second vent 21, presses down on the gasket 31, and releases the seal between the gasket 31 and the valve body 2. The gas then enters the oil tank through the third vent 51 and the first vent 11 in sequence to achieve the air intake function.

[0043] Exhaust status (e.g.) Figure 3 As shown): When the internal pressure of the oil tank rises to the set value, the high-pressure gas pushes the valve body 2 upward. The internal gas passes through the first vent 11 and the third vent 51 in sequence, and is discharged to the atmosphere through the gap between the valve body 2 and the flange 12, thus realizing the venting function. After the venting is completed, the spring 41 returns the valve body 2 to the closed state.

[0044] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pre-pressurized one-way breathing valve, characterized in that, include: A valve seat, wherein a gas passage is provided inside the valve seat and a first vent hole is provided at the top; A valve body is disposed above the valve seat, and a second vent hole is provided on the valve body; A first sealing gasket is disposed between the valve body and the valve seat. The first sealing gasket includes a gasket and a support gasket, with the support gasket located at the middle of the bottom end of the gasket. The gasket closes the second vent hole, and a gap is left between the bottom of the gasket and the valve seat. An elastic component, the elastic component comprising: a spring, a retaining rod, and a locking nut; The bottom of the fixing rod passes through the valve body and the first sealing gasket in sequence, and is connected to the valve seat; the spring is sleeved on the outside of the valve seat and placed on the top of the valve body; the locking nut is connected to the fixing rod and presses the spring; the first sealing gasket is sleeved on the outside of the fixing rod.

2. The pre-pressurized breathing check valve according to claim 1, characterized in that, The top of the valve seat extends upward along its circumference to form an annular flange, and the valve body is located within the cavity formed by the flange surrounding the top of the valve seat.

3. A pre-pressurized breathing check valve according to claim 1, characterized in that, The bottom of the valve body is recessed inward to form a sealing cavity, and the first sealing gasket is placed inside the sealing cavity.

4. A pre-pressurized breathing check valve according to claim 3, characterized in that, The valve seat is provided with a second sealing gasket at the top, and the top of the second sealing gasket is sealed to the valve body. A third vent hole is provided on the surface of the second sealing gasket, which is connected to the first vent hole.

5. A pre-pressurized breathing check valve according to claim 1, characterized in that, A receiving groove for accommodating the spring is provided at the connection point between the top of the valve body and the spring.

6. A pre-pressurized breathing check valve according to claim 5, characterized in that, A spring cover is provided at the top of the spring, the fixing rod passes through the spring cover, and the locking nut presses the spring cover tightly.

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