Storage tank breather valve

Abstract

The utility model discloses a storage tank breather valve, which relates to the technical field of valves, and is characterized in that the storage tank breather valve comprises a valve body, the valve body is provided with an air vent, an air outlet and an air inlet, an air outlet channel is formed between the air vent and the air outlet, an air inlet channel is formed between the air vent and the air inlet, and the air inlet channel is communicated with the air outlet. A first sealing piece is arranged at the end, close to the air outlet, of the air outlet channel, a second sealing piece is arranged at the end, close to the air inlet, of the air inlet channel, the sliding direction of the first sealing piece is opposite to the flow direction of the air outlet channel, and the gravity direction of the second sealing piece is opposite to the flow direction of the air inlet channel. Through the arrangement of the internal structure of the valve body, air pressure can be supplemented into the storage tank when the internal pressure of the storage tank is low, excessive pressure is discharged when the internal pressure of the storage tank is high, and the performance is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically, to a storage tank breathing valve. Background Art

[0002] In the natural gas dosing machine, the storage tank is a very important component. When the storage tank is working normally, it needs to maintain normal pressure with the atmosphere. When the liquid level in the tank drops, it needs to absorb air from the outside to achieve the balance of internal and external air pressure. When the tank is loaded with medicine, it needs to discharge air to the outside to achieve the balance of internal and external air pressure.

[0003] In actual production, when the natural gas dosing machine works normally, it is required that the tank does not emit odorous gases to the outside, which will pollute the atmosphere and reduce the air quality. Therefore, a breathing valve is needed to achieve the above functional requirements. However, most of the current breathing valves are one-way structures, that is, the breathing valve only realizes one of the intake and exhaust functions. This requires at least two breathing valves to be installed on the storage tank, which increases the difficulty of installation and maintenance.

[0004] Therefore, it is necessary to provide a storage tank breathing valve to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a storage tank breathing valve to solve the problems raised in the above background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A storage tank breathing valve comprises a valve body, wherein an air vent, an air outlet and an air inlet are formed on the valve body, an air outlet channel is formed between the air vent and the air outlet, an air inlet channel is formed between the air vent and the air inlet, a sealing member 1 is provided at one end of the air outlet channel close to the air outlet, a sealing member 2 is provided at one end of the air inlet channel close to the air inlet, a sliding direction of the sealing member 1 is arranged opposite to a flow direction of the air outlet channel, and a gravity direction of the sealing member 2 is arranged opposite to a flow direction of the air inlet channel.

[0008] The technical solution of the utility model is further configured as follows: the valve body includes a front valve body and a rear valve body fixedly connected thereto, a cavity is formed between the front valve body and the rear valve body, the air vent, the air inlet and the air outlet are all connected to the cavity, the air vent and the air inlet are opened on the front valve body, and the air outlet is opened on the rear valve body.

[0009] The technical solution of the utility model is further configured as follows: a receiving groove is provided on the front valve body, a convex portion is fixedly connected to the rear valve body and is inserted into the receiving groove and interference fits with the inner wall of the receiving groove, there is a distance between the convex portion and the inner bottom surface of the receiving groove, and the cavity is formed by the distance.

[0010] The technical solution of the utility model is further configured as follows: an internal valve regulating core is provided in the convex portion, the internal valve regulating core is inserted into the convex portion and has an interference fit with the inner wall of the convex portion, a through groove one is provided on the regulating core for passing through the regulating core, two ends of the through groove one are respectively connected with the cavity and the air outlet, the sealing member one is spherical and is located at one end of the through groove one facing the air outlet, and the diameter of the sealing member one is larger than the diameter of the through groove one.

[0011] The technical solution of the utility model is further configured as follows: a limiting groove connected to the through groove 1 is opened in the rear valve body, an elastic member is fixedly connected to the end of the limiting groove away from the through groove 1, and the sealing member 1 is slidably connected in the limiting groove and fixedly connected to the elastic member.

[0012] The technical solution of the utility model is further configured as follows: a valve internal fixed core is fixedly connected to the front valve body, a through groove 2 is provided on the valve internal fixed core to penetrate the valve internal fixed core, both ends of the through groove 2 are respectively connected to the cavity and the air inlet, the sealing component 2 is spherical and is located at one end of the through groove 2 facing the cavity, and the diameter of the sealing component 2 is larger than the diameter of the through groove 2.

[0013] The technical solution of the utility model is further configured as follows: there is a distance between the end of the second sealing member away from the fixed core in the valve and the regulating core in the valve, and the distance between the fixed core in the valve and the regulating core in the valve is smaller than the height of the cavity.

[0014] The technical solution of the utility model is further configured as follows: the end of the through groove 1 abutting against the sealing member 1 and the end of the through groove 2 abutting against the sealing member 2 are both chamfered.

[0015] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0016] The entire valve body is synthesized by assembling the front valve body and the rear valve body, and a cavity is formed in the valve body, so that the air vent, air outlet and air inlet on the valve body can form an air inlet channel or an air outlet channel when air intake or exhaust is required, thereby ensuring the air pressure balance between the storage tank and the outside air, ensuring safety, and stable and reliable performance.

[0017] The elastic part is used to make the seal one close the air outlet channel, and the gravity of the seal two is used to close the air inlet channel, so that the storage tank breathing valve has a two-way sealing structure with stronger protection. In addition, the chamfers on the regulating core and the fixed core inside the valve can also make the seal one and the regulating core inside the valve, and the seal two and the fixed core inside the valve fit better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is an exploded view of the utility model;

[0020] Figure 3 It is a cross-sectional view of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the rear valve body in the utility model.

[0022] In the figure: 1. vent; 2. air outlet; 3. air inlet; 4. seal 1; 5. seal 2; 6. front valve body; 7. rear valve body; 8. cavity; 9. convex part; 10. regulating core in valve; 11. through groove 1; 12. limiting groove; 13. elastic part; 14. fixed core in valve; 15. through groove 2; 16. chamfer. DETAILED DESCRIPTION

[0023] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model. Example

[0024] like Figures 1 to 4 As shown, the utility model provides a storage tank breathing valve, including a valve body, on which an air vent 1, an air outlet 2 and an air inlet 3 are formed, an air outlet channel is formed between the air vent 1 and the air outlet 2, an air inlet channel is formed between the air vent 1 and the air inlet 3, a sealing member 1 4 is provided at one end of the air outlet channel close to the air outlet 2, a sealing member 2 5 is provided at one end of the air inlet channel close to the air inlet 3, a sliding direction of the sealing member 1 4 is arranged opposite to the flow direction of the air outlet channel, and a gravity direction of the sealing member 2 5 is arranged opposite to the flow direction of the air inlet channel.

[0025] like Figures 1 to 4As shown, the valve body includes a front valve body 6 and a rear valve body 7 fixedly connected thereto, the front valve body 6 and the rear valve body 7 are both made of 316 stainless steel and a cavity 8 is formed therebetween, the air vent 1, the air inlet 3 and the air outlet 2 are all connected to the cavity 8, the air vent 1 and the air inlet 3 are provided on the front valve body 6, the air outlet 2 is provided on the rear valve body 7, a receiving groove is provided on the front valve body 6, a convex portion 9 which is inserted into the receiving groove and has an interference fit with the inner wall of the receiving groove is fixedly connected to the rear valve body 7, there is a distance between the convex portion 9 and the inner bottom surface of the receiving groove, and the cavity 8 is formed by the distance.

[0026] The convex portion 9 on the rear valve body 7 is used to perform an interference fit with the front valve body 6, so that the sealing effect of the breathing valve of the storage tank is better, and air leakage can be avoided as much as possible to improve safety. The air inlet 3 and the air outlet 2 can be connected to the vent 1 through the cavity 8, thereby forming an air inlet channel and an air outlet channel in the valve body. When in use, the air inlet channel or the air outlet channel can be switched according to the needs of the situation, and the practicality is high.

[0027] like Figures 1 to 4 As shown, an in-valve regulating core 10 is provided in the convex portion 9, and the in-valve regulating core 10 is inserted into the convex portion 9 and has an interference fit with the inner wall of the convex portion 9, and a through groove 11 is provided on the regulating core to penetrate it, and the two ends of the through groove 11 are respectively connected with the cavity 8 and the air outlet 2, and the sealing member 4 is spherical and is located at the end of the through groove 11 facing the air outlet 2, and the diameter of the sealing member 4 is larger than the diameter of the through groove 11, and a limiting groove 12 connected with the through groove 11 is provided in the rear valve body 7, and an elastic member 13 is fixedly connected to the end of the limiting groove 12 away from the through groove 11, and the elastic member 13 here adopts a spring, and the sealing member 4 is slidably connected in the limiting groove 12 and fixedly connected to the elastic member 13.

[0028] The elastic member 13 in the limiting groove 12 applies pressure to the seal 4 toward the through groove 11 and closes it, so that the exhaust passage is closed. Only when the vent 1 is exhausted toward the cavity 8, can the seal 4 be lifted up and exhaust be exhausted toward the gas processing equipment connected to the outlet 2 to avoid polluting the outside air.

[0029] like Figures 1 to 4 As shown, a valve internal fixed core 14 is fixedly connected inside the front valve body 6, and a through groove 15 is provided on the valve internal fixed core 14 to penetrate it. The two ends of the through groove 15 are respectively connected with the cavity 8 and the air inlet 3. The sealing member 25 is spherical and is located at the end of the through groove 15 facing the cavity 8. The diameter of the sealing member 25 is larger than the diameter of the through groove 15. There is a distance between the end of the sealing member 25 away from the valve internal fixed core 14 and the valve internal regulating core 10. The distance between the valve internal fixed core 14 and the valve internal regulating core 10 is smaller than the height of the cavity 8. The end of the through groove 11 abutting against the sealing member 14 and the end of the through groove 15 abutting against the sealing member 25 are both provided with chamfers 16.

[0030] The through groove 15 is closed by the gravity of the seal 2 5 itself, so that the air inlet channel is closed. Only when the liquid level in the storage tank drops, the outside air can lift the seal 2 5 due to the air pressure and flow to the vent 1 and into the storage tank to maintain the air pressure balance.

[0031] like Figures 1 to 4 As shown, when the storage tank works normally, its internal liquid level drops, and the outside air flows into the groove 15 through the air inlet 3 and lifts the seal 5, and then enters the cavity 8 and the vent 1 in turn, and finally flows into the storage tank, so that the internal and external air pressures of the storage tank are balanced. When the pressure of the storage tank increases, the gas in the storage tank passes through the vent 1 and the cavity 8 and enters the groove 11, and then resists the pressure applied by the elastic member 13 to the seal 4, allowing the seal 4 to slide upward along the limiting groove, flow to the gas processing equipment connected to the air outlet 2, and be discharged to the atmosphere after deodorization, thereby completing the breathing purpose.

[0032] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A tank breathing valve, comprising a valve body, characterized in that: The valve body is provided with an air vent (1), an air outlet (2) and an air inlet (3); an air outlet channel is formed between the air vent (1) and the air outlet (2); an air inlet channel is formed between the air vent (1) and the air inlet (3); a sealing member 1 (4) is provided at one end of the air outlet channel close to the air outlet (2); a sealing member 2 (5) is provided at one end of the air inlet channel close to the air inlet (3); the sliding direction of the sealing member 1 (4) is arranged opposite to the flow direction of the air outlet channel; the gravity direction of the sealing member 2 (5) is arranged opposite to the flow direction of the air inlet channel; The valve body comprises a front valve body (6) and a rear valve body (7) fixedly connected thereto, a cavity (8) is formed between the front valve body (6) and the rear valve body (7), the air vent (1), the air inlet (3) and the air outlet (2) are all connected to the cavity (8), the air vent (1) and the air inlet (3) are provided on the front valve body (6), and the air outlet (2) is provided on the rear valve body (7).

2. A tank breathing valve according to claim 1, characterized in that: The front valve body (6) is provided with a receiving groove, and the rear valve body (7) is fixedly connected with a protrusion (9) which is inserted into the receiving groove and has an interference fit with the inner wall of the receiving groove. There is a distance between the protrusion (9) and the inner bottom surface of the receiving groove, and the cavity (8) is formed by the distance.

3. A tank breathing valve according to claim 2, characterized in that: The convex portion (9) is provided with an in-valve regulating core (10), the in-valve regulating core (10) is inserted into the convex portion (9) and is interference fit with the inner wall of the convex portion (9), the regulating core is provided with a through groove (11) passing through the regulating core, the two ends of the through groove (11) are respectively connected with the cavity (8) and the air outlet (2), the sealing member (4) is spherical and is located at one end of the through groove (11) facing the air outlet (2), and the diameter of the sealing member (4) is larger than the diameter of the through groove (11).

4. A tank breathing valve according to claim 3, characterized in that: The rear valve body (7) is provided with a limiting groove (12) in communication with the through groove one (11); an elastic member (13) is fixedly connected to the limiting groove (12) at one end away from the through groove one (11); the sealing member one (4) is slidably connected in the limiting groove (12) and fixedly connected to the elastic member (13).

5. A tank breathing valve according to claim 3, characterized in that: The front valve body (6) is fixedly connected to a valve internal fixed core (14), and the valve internal fixed core (14) is provided with a through groove (15) penetrating the same, and the two ends of the through groove (15) are respectively connected to the cavity (8) and the air inlet (3), and the sealing member (5) is spherical and is located at one end of the through groove (15) facing the cavity (8), and the diameter of the sealing member (5) is larger than the diameter of the through groove (15).

6. A tank breathing valve according to claim 5, characterized in that: There is a distance between the end of the second sealing member (5) away from the internal valve fixed core (14) and the internal valve regulating core (10), and the distance between the internal valve fixed core (14) and the internal valve regulating core (10) is smaller than the height of the cavity (8).

7. A tank breathing valve according to claim 6, characterized in that: The end of the through groove 1 (11) abutting against the sealing member 1 (4) and the end of the through groove 2 (15) abutting against the sealing member 2 (5) are both provided with chamfers (16).

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