Sealing liquid container with balanced internal and external air pressure

Abstract

The utility model relates to a liquid sealing container, in particular to a sealing liquid container with balanced internal and external air pressure, which comprises a liquid storage tank, the duckbill valve is arranged on the liquid storage tank; the liquid suction joint is arranged on the liquid storage tank; the liquid suction pipe is arranged on the liquid suction connector and located in the liquid storage tank. According to the sealed liquid container with the balanced internal and external air pressure, the duckbill valve is used for preventing liquid in the container from leaking outwards, meanwhile, the internal and external pressure of the container can be kept consistent, the overall structure is simple, the assembly difficulty is low, batch production is easy to achieve, the structure is safe and reliable, and the yield is high.

Description

Technical Field

[0001] This utility model relates to a liquid sealing container, and more particularly to a sealed liquid container with balanced internal and external air pressure. Background Technology

[0002] To balance internal and external pressures, the methanol storage tank in a methanol fuel cell primarily uses a permeable float. The structure of the permeable float is as follows: Figure 3 As shown, the breathable float includes a PP float, a breathable tube, a counterweight, and a fixed heat shrink tubing. The breathable tube extends from the outer wall of the PP float to the top. Due to buoyancy, the float floats above the liquid, ensuring that the breathable tube is above the liquid level. The other end of the breathable tube is connected to the atmosphere, thereby ensuring that the pressure inside and outside the container is consistent.

[0003] The following problems exist with the use of breathable floats:

[0004] (1) The ventilator tube of the ventilator float is fixed by a fixed heat shrink tubing. The ventilator tube will deform due to the pressure, causing the ventilator tube to be blocked and the air to be not smooth.

[0005] (2) The fixed heat shrink tubing used for a long time will age and deform, causing the vent tube fixing structure to fail, the extension length of the pressure balance tube cannot be fixed, and if the extension length of the pressure balance tube is too long, it will cause "top-heavy" and cause the float to overturn; if the extension length of the pressure balance tube is too short, it will cause the pressure balance tube to be unable to extend above the liquid surface.

[0006] Both of these situations can cause liquid to enter the pressure balance tube, resulting in blockage and affecting the pressure balance effect of the counterweight.

[0007] (3) PP plastic floats are heavy and tend to sink into the fuel during use, making it impossible for the pressure balance tube to reach above the liquid surface, thus causing the pressure balance function to fail.

[0008] (4) The structure is complex, the assembly is difficult, and the product yield is low. Summary of the Invention

[0009] To solve the above problems, this utility model provides a sealed liquid container with balanced internal and external air pressure. The specific technical solution is as follows:

[0010] A sealed liquid container with balanced internal and external air pressure includes: a liquid storage tank; a duckbill valve disposed on the liquid storage tank; a liquid suction connector disposed on the liquid storage tank; and a liquid suction tube disposed on the liquid suction connector and located inside the liquid storage tank.

[0011] Preferably, the sealed liquid container further includes a liquid-absorbing weight, which is disposed at the end of the liquid-absorbing tube.

[0012] Preferably, the sealed liquid container further includes: a vent cover, which is disposed on the liquid storage tank and located on top of the duckbill valve, and the vent cover is provided with a plurality of vent holes.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This utility model provides a sealed liquid container with balanced internal and external air pressure. It uses a duckbill valve to prevent the liquid inside the container from leaking out, while maintaining the same pressure inside and outside the container. The overall structure is simple, easy to assemble, easy to mass-produce, and the structure is safe, reliable, and has a high yield. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this application;

[0016] Figure 2 This is a cross-sectional view of this application;

[0017] Figure 3 This is a schematic diagram of the structure of a breathable float. Detailed Implementation

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] like Figure 1 and Figure 2 As shown, a sealed liquid container with balanced internal and external air pressure includes a liquid storage tank 3, a duckbill valve 2, a liquid suction connector 5, and a liquid suction pipe 6. The duckbill valve 2 and the liquid suction connector 5 are both installed on the top of the liquid storage tank 3. The liquid suction connector 5 is also equipped with a liquid suction pipe 6, which is located inside the liquid storage tank 3 for liquid suction.

[0020] Duckbill valve 2 is used to balance the internal and external air pressure of the liquid storage tank 3. Duckbill valve 2 is a mature, existing product that controls the opening and closing of the valve by changes in internal pressure. When the internal and external pressures are equal, the outlet of duckbill valve 2 is closed due to its own elasticity, preventing liquid from flowing out. When the internal liquid is discharged, the internal pressure of the container decreases, and duckbill valve 2 gradually opens, allowing external gas to enter the container, thus achieving pressure balance. Duckbill valve 2 is generally made of silicone rubber, fluororubber, or other elastic rubber materials.

[0021] The duckbill valve 2 can prevent liquid from leaking out of the container to ensure safe use at various tilt angles during portability. On the other hand, it can also maintain consistent pressure inside and outside the container to prevent pressure reduction caused by the decrease in liquid inside the container, thus avoiding any impact on liquid delivery.

[0022] The function of the liquid storage tank 3 is to hold liquids, including water or organic reagents, and the material is PP, PE or other engineering plastic materials.

[0023] The rear end of the suction connector 5 is connected to the infusion pump for use. To ensure that the liquid in the container is successfully drawn by the infusion pump, the internal suction hose and suction weight 4 are integrated. The suction weight 4 can ensure that the suction port is always below the liquid level.

[0024] To protect the duckbill valve 2, a vent cover 1 is also included. The vent cover 1 is fixed to the liquid storage tank 3 by means of threads or snap-fit. The vent cover 1 is located on the top of the duckbill valve 2. The vent cover 1 has several vent holes 11, which can ensure that external air can pass smoothly through the duckbill valve 2.

[0025] The sealed liquid container is used for methanol storage in methanol fuel cells. Methanol fuel is drawn from the outside by a methanol pump, while an internal counterweight ensures reliable liquid intake. A duckbill valve (2) promptly balances the internal and external pressures when the internal pressure drops, ensuring normal liquid intake by the methanol pump.

[0026] Sealed liquid containers are used for pressure balance and to prevent liquid splashing and overflow. They can be used in portable fuel cells. Even when the liquid storage tank 3 is in constant motion or crawling, it can still supply liquid, making the liquid supply reliable.

[0027] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without inventive effort, and these embodiments will all fall within the protection scope of the claims of this utility model.

Claims

1. A sealed liquid container with balanced internal and external air pressure, characterized in that, include: Storage tank (3); A duckbill valve (2) is provided on the liquid storage tank (3); A liquid suction connector (5) is provided on the liquid storage tank (3); and The suction tube (6) is provided on the suction connector (5) and located inside the storage tank (3).

2. A sealed liquid container with balanced internal and external air pressure according to claim 1, characterized in that, The sealed liquid container further includes a liquid suction weight (4), which is located at the end of the liquid suction tube (6).

3. A sealed liquid container with balanced internal and external air pressure according to claim 1, characterized in that, The sealed liquid container further includes: a vent cover (1), which is located on the liquid storage tank (3) and at the top of the duckbill valve (2), and has several vent holes (11).

Images