Internal and external pressure balancing device for water tank

Abstract

The utility model provides an internal and external pressure balancing device for a water tank, which is applied to the technical field of two-way valves and is characterized by comprising the water tank and a combined two-way valve mounted on the water tank. The combined two-way valve comprises a valve body clamped on the water tank, an umbrella valve part integrally formed at one end of the valve body and a duckbill valve part integrally formed at the other end of the valve body; an air inlet channel which is communicated with the duckbill valve part and is controlled to be opened or closed by the duckbill valve is arranged in the middle of the valve body; the water tank is provided with an air outlet channel controlled by the umbrella valve to be opened or closed. The automatic pressure relief device has the technical effects of being capable of effectively realizing automatic air supply and pressure relief of the water tank, simple in structure, convenient to install and suitable for various water tank systems.

Description

Technical Field

[0001] This utility model relates to the field of two-way valve technology, and in particular to a pressure balancing device for the inside and outside of a water tank. Background Technology

[0002] Water tanks are used for water storage and are widely used in various fields. In order to reduce the size and simplify the structure, water tanks are generally equipped with one inlet and one outlet. When the inlet stops supplying water while the outlet continues to drain water, a vacuum will gradually form inside the water tank, which will prevent the liquid from flowing out smoothly due to the external atmospheric pressure. At this time, it is necessary to replenish air into the water tank through an air replenishment device to balance the pressure inside and outside the water tank and ensure that the liquid is discharged normally.

[0003] On the other hand, when the outlet is blocked while the inlet continues to supply water, or when the tank expands due to high temperature, the internal pressure of the water tank will continue to rise, posing a risk of the water tank bursting; at this time, a pressure relief device is needed to release excess pressure in time to ensure system safety.

[0004] Existing water tanks typically use separate air supply valves and pressure relief valves to achieve the above functions; however, using two separate one-way valves to achieve air supply and pressure relief functions separately occupies a large space and restricts the installation layout.

[0005] Existing air replenishment or pressure relief structures are independent, requiring two check valves, which require a large installation space and need to be installed on one side and the other side, resulting in multiple installation steps. Furthermore, the two check valves usually need to be installed in opposite directions (e.g., the air replenishment valve opens in the forward direction and the pressure relief valve opens in the reverse direction), which increases the assembly process and difficulty. Utility Model Content

[0006] The purpose of this invention is to provide a pressure balancing device for the inside and outside of a water tank. Its advantages are simple structure and effective air replenishment and pressure relief of the water tank.

[0007] To achieve the above and other related objectives, this utility model provides the following technical solution:

[0008] A pressure balancing device for inside and outside a water tank, comprising a water tank and a combined two-way valve installed on the water tank;

[0009] The combined two-way valve includes a valve body snapped onto a water tank, an umbrella valve integrally formed at one end of the valve body, and a duckbill valve integrally formed at the other end of the valve body; the valve body has an air inlet channel in the middle that communicates with the duckbill valve and is controlled by the duckbill valve to open or close; the water tank has an air outlet channel that is controlled by the umbrella valve to open or close.

[0010] In one embodiment of the present invention, the water tank includes a tank body, an inlet pipe disposed at the top of the tank body, and an outlet pipe disposed at the bottom of the tank body.

[0011] In one embodiment of the present invention, a recessed groove is provided on the top of the box, and the combined two-way valve is installed in the recessed groove;

[0012] A shielding membrane is provided on the housing above the combined two-way valve to shield the sinking groove.

[0013] In one embodiment of this utility model, the shielding membrane is a waterproof and breathable membrane.

[0014] In one embodiment of this utility model, the housing has a mounting hole, and the valve body is snapped and fixed in the mounting hole; the duckbill valve is integrally formed on the bottom of the valve body and located inside the water tank.

[0015] The umbrella valve is integrally formed on the top of the valve body and located on the outside of the water tank.

[0016] In one embodiment of this utility model, the combined bidirectional valve is made of an elastomeric material.

[0017] As described above, the water tank internal and external pressure balancing device of this utility model has the following beneficial effects:

[0018] 1. The combined two-way valve can automatically regulate the pressure inside the water tank. When the inlet stops supplying water while the outlet continues to drain, the internal air pressure of the water tank decreases. Since the external atmospheric pressure is greater than the internal air pressure, air enters the duckbill valve through the air inlet channel. Under pressure, the duckbill valve opens, allowing air to enter the water tank and replenish the air. Conversely, when the outlet is blocked while the inlet continues to supply water, or due to high temperatures causing the tank to expand, the internal pressure of the water tank will continuously increase. Since the internal pressure is greater than the external atmospheric pressure, the gas inside the tank enters the air outlet channel and opens the umbrella valve under pressure, releasing pressure from the water tank. The structure is simple and effectively achieves automatic air replenishment and pressure relief of the water tank.

[0019] 2. A sinking trough is provided on the top of the tank, and a combined two-way valve is installed in the sinking trough and covered by a waterproof and breathable membrane to prevent sewage from entering the air intake channel and entering the water tank during automatic air replenishment, thus preventing pollution of the water inside the tank. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Figure 2 yes Figure 1 Enlarged diagram of part A in the middle.

[0022] Attached reference numerals: 1. Water tank; 2. Combined two-way valve; 21. Valve body; 22. Umbrella valve; 23. Duckbill valve; 24. Air inlet channel; 25. Air outlet channel; 3. Water inlet pipe; 4. Water outlet pipe; 5. Sinking tank; 6. Waterproof and breathable membrane; 7. Mounting hole; 8. Tank body; 9. Cut slit. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] Please see Figures 1 to 2 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0025] Please see Figure 1 and Figure 2 This utility model provides a water tank pressure balancing device, including a water tank 1 and a combined two-way valve 2 installed on the water tank 1; the combined two-way valve 2 is made of an elastomeric material, such as rubber, silicone or TPU, which has good sealing and pressure resistance.

[0026] The combined two-way valve 2 includes a valve body 21 snapped onto the water tank 1, an umbrella valve 22 integrally formed at one end of the valve body 21, and a duckbill valve 23 integrally formed at the other end of the valve body 21. In this embodiment, the valve body 21 is provided with an air intake channel 24 that communicates with the duckbill valve 23 and is controlled by the duckbill valve 23 to open or close. In this embodiment, the duckbill valve 23 is a frustum-shaped tubular structure, and the large-diameter end of the frustum-shaped tubular structure is integrally formed with the valve body 21. The small-diameter end of the frustum-shaped tubular structure is provided with a slit 9. When a negative pressure is formed inside the water tank 1, external air enters the duckbill valve 23 through the air intake channel 24 and, under the action of air pressure, opens the slit 9, allowing air to enter the water tank 1 and realizing the air replenishment function.

[0027] The water tank 1 is provided with an air outlet channel 25, which is controlled by an umbrella valve 22 to open or close. In this embodiment, the umbrella valve 22 is a ring structure, which abuts against the air outlet channel 25 and forms a sealing surface with the air outlet channel 25. When the internal pressure of the water tank 1 is too high, the gas pushes the umbrella valve 22 to open outward so that the ring structure leaves the air outlet channel 25, the sealing surface disappears, and the high-pressure gas is discharged through the air outlet channel 25 to achieve the pressure relief function.

[0028] Please see Figure 1 and Figure 2 In this embodiment, the duckbill valve 23 is integrally formed at the bottom of the valve body 21, and the umbrella valve 22 is integrally formed at the top of the valve body 21; wherein the duckbill valve 23 is located inside the water tank 1, while the umbrella valve 22 is located outside the water tank 1, so that the air replenishment and pressure relief processes do not interfere with each other.

[0029] The water tank 1 includes a tank body 8, an inlet pipe 3 integrally formed on the top of the tank body 8, and an outlet pipe 4 integrally formed on the bottom of the tank body 8; in this embodiment, a sinking groove 5 is provided on the top of the tank body 8, and a combined two-way valve 2 is installed in the sinking groove 5; wherein the height of the installation position of the combined two-way valve 2 determines the magnitude of the pressure relief of the umbrella valve 22.

[0030] A shielding membrane is pasted and covered above the sink 5. In this embodiment, the shielding membrane can be a waterproof and breathable membrane 6 (such as a PTFE membrane) to prevent external dust or sewage from entering the air intake channel 24 and entering the water tank 1 when the water tank 1 is automatically replenished, thus polluting the water inside the water tank 1. Furthermore, the waterproof and breathable membrane 6 will not affect air circulation. In this embodiment, an installation hole 7 is provided in the sink 5, and the valve body 21 is snap-fitted into the installation hole 7, which is convenient to install and has good sealing performance.

[0031] Brief description of usage:

[0032] Air replenishment process: When the water inlet stops supplying water while the outlet continues to drain water, or due to high temperature causing the tank to expand due to heat, a negative pressure is formed inside the water tank 1. The external atmospheric pressure pushes air through the air inlet channel 24 into the duckbill valve 23. The duckbill valve 23 opens under pressure, and air enters the water tank 1 to balance the internal and external pressures and ensure that the liquid flows out smoothly.

[0033] Pressure relief process: When the outlet is blocked while the inlet continues to supply water, the internal pressure of water tank 1 increases, and the high-pressure gas pushes the umbrella valve 22 to open outward, allowing the gas to be discharged through the venting channel 25, preventing water tank 1 from bursting.

[0034] In summary, this utility model achieves a unified function of air replenishment and pressure relief, with a simple structure and convenient installation, making it suitable for various water tank systems. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0035] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A pressure balancing device for a water tank, comprising a water tank (1), characterized in that: It also includes a combined two-way valve (2) installed on the water tank (1); The combined two-way valve (2) includes a valve body (21) snapped onto the water tank (1), an umbrella valve (22) integrally formed at one end of the valve body (21), and a duckbill valve (23) integrally formed at the other end of the valve body (21); the valve body (21) is provided with an air inlet channel (24) that communicates with the duckbill valve (23) and is controlled to open or close by the duckbill valve (23); the water tank (1) is provided with an air outlet channel (25) that is controlled to open or close by the umbrella valve (22).

2. The pressure balancing device inside and outside a water tank according to claim 1, characterized in that: The water tank (1) includes a tank body (8), an inlet pipe (3) located at the top of the tank body (8), and an outlet pipe (4) located at the bottom of the tank body (8).

3. The pressure balancing device inside and outside a water tank according to claim 2, characterized in that: The top of the box (8) is provided with a sinking groove (5), and the combined two-way valve (2) is installed in the sinking groove (5); A shielding membrane is provided on the housing (8) above the combined two-way valve (2) to shield the sinking groove (5).

4. The pressure balancing device inside and outside a water tank according to claim 3, characterized in that: The shielding membrane is a waterproof and breathable membrane (6).

5. The pressure balancing device inside and outside a water tank according to claim 2, characterized in that: The housing (8) has an installation hole (7), and the valve body (21) is snapped and fixed in the installation hole (7); the duckbill valve (23) is integrally formed at the bottom of the valve body (21) and located inside the water tank (1), and the umbrella valve (22) is integrally formed at the top of the valve body (21) and located outside the water tank (1).

6. The pressure balancing device inside and outside a water tank according to claim 5, characterized in that: The combined two-way valve (2) is made of an elastomer material.

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