Constant-pressure air supply device
By using a unidirectional conduction structure with piston and O-ring in a liquid pressure vessel, the problems of complex structure and high cost of existing pressure control and release devices are solved, and automatic gas replenishment control and cost reduction are achieved.
Patent Information
- Application Number
- CN202423119410.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-17
AI Technical Summary
Existing pressure control and release devices for liquid pressure vessels are complex in structure, costly, and disposable, leading to waste.
The design employs a unidirectional flow structure with a piston and O-ring, and simplifies the structure and reduces costs by setting a channel inside the piston and using a rubber cap to control gas flow.
It achieves automatic air replenishment control, reduces production costs, is suitable for single use, and has a simple and reliable structure.
Smart Images
Figure CN223511908U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a constant pressure air supply device, belonging to the field of pressure equipment. Background Technology
[0002] In liquid pressure vessels (such as carbonated beverage cans), the pressure decreases after some liquid is discharged, affecting the discharge of the remaining liquid. To maintain stable internal pressure and ensure sufficient pressure for the discharge of the remaining liquid, gas is added to the liquid pressure vessel after partial discharge to maintain the pressure.
[0003] In existing technologies, to replenish gas into a liquid pressure vessel, a pressure control release device is installed at the gas core of the high-pressure gas tank to control the gas release. Existing pressure control release devices mostly use a spring-fed unidirectional conduction structure to control the movement of the piston and the opening of the pressure channel. These devices have many components and a relatively complex structure, resulting in high costs. Furthermore, as disposable items, pressure control release devices lead to significant waste. Utility Model Content
[0004] This invention provides a constant pressure air replenishment device that achieves automatic air replenishment control, reduces the number of components, simplifies the structure, has a lower cost, and has good reliability.
[0005] The technical solution adopted by this utility model is a constant pressure gas replenishment device, including a pressure vessel one and a container two containing high pressure gas; the container two is placed inside the pressure vessel one, and the container two has a gas core; the container two is connected to a pressure control and release device, and the pressure control and release device cooperates with the gas core of the container two.
[0006] The pressure control and release device includes a cover, which covers one end of the container with an air core and encloses the air core inside the cover;
[0007] The housing contains a piston that divides the interior of the housing into two independent chambers, namely chamber one and chamber two; chamber one is connected to the interior of pressure vessel one.
[0008] The first chamber and the second chamber have a unidirectional passage for communication between the first chamber and the second chamber; the pressure difference between the first chamber and the second chamber pushes the piston to move in the direction of approaching or moving away from the air core inside the casing, and after the piston moves towards the air core, it pushes the air core to open.
[0009] In the optimized constant pressure air supply device described above, an O-ring is provided between the side wall of the piston and the inner side wall of the casing. The O-ring is fixedly fitted onto the piston, and the piston and the casing are slidably sealed by the O-ring.
[0010] In the optimized version of the constant pressure air supply device, one end of the channel is located inside chamber one and connected to chamber one, while the other end of the channel is located inside chamber two and connected to chamber two.
[0011] The optimized constant pressure air supply device also includes a one-way flow component; the one-way flow component is a one-way valve, which is installed at the end opening of the channel or inside the channel.
[0012] The optimized constant pressure air supply device also includes a unidirectional conduction component, which is a rubber cap;
[0013] An installation part is constructed at one end of the channel located in the second chamber. The end opening of the channel located in the second chamber is located on the surface of the installation part. A rubber cap is fitted onto the installation part and covers the end opening of the channel located in the second chamber.
[0014] The rubber cap is in tight contact with the mounting part.
[0015] In the optimized version of the constant pressure air supply device, the channel is constructed inside the piston;
[0016] Alternatively, the openings may be constructed on the outside of the casing;
[0017] Alternatively, the channels may be constructed within the casing.
[0018] The optimized constant pressure air supply device described above has a closed shell with an internal cavity and an opening at the lower end; the opening at the lower end of the shell is fixedly engaged with the container.
[0019] There is a gap between the lower opening of the cover and the second container, and the first chamber communicates with the inside of the first pressure vessel through the gap between the lower opening of the cover and the second container; or, the lower opening of the cover is sealed with the second container, and there is a through hole on the lower side wall of the cover, and the first chamber communicates with the inside of the first pressure vessel through the through hole on the lower side wall of the cover.
[0020] In the optimized version of the constant pressure gas supply device, a conduit is provided inside the pressure vessel. One end of the conduit is located inside the pressure vessel, and the other end of the conduit passes through the end wall of the pressure vessel and has a valve.
[0021] In the optimized constant pressure gas replenishment device described above, the volume ratio of container two to pressure container one is 1:30-1:10, wherein the volume of pressure container one is 3L to 1000L.
[0022] The advantages of this application are:
[0023] In the technical solution of this application, a channel is opened on the piston to connect chamber one and chamber two, and a rubber cap is used at the opening end of the channel to control the opening and closing of the opening end of the channel. This can complete the pressure control between chamber one and chamber two, and thus control the opening of the piston to the gas core of container two. Compared with the existing control device, the structure is simple, the production cost is low, and it is suitable for single use.
[0024] The technical solution of this application changes the situation in the prior art where the connecting channel between chamber one and chamber two is located outside the piston. The design purpose can be achieved simply by setting a channel inside the piston, which greatly simplifies the design structure. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of this application;
[0026] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of this application;
[0027] Figure 3 for Figure 2 Internal structure diagram;
[0028] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this application;
[0029] Figure 5 This is a schematic diagram of the structure of Embodiment 3 of this application;
[0030] Figure 6 This is a schematic diagram of the structure of Embodiment 4 of this application;
[0031] Figure 7 This is a schematic diagram of the structure of Embodiment 5 of this application;
[0032] Figure 8 This is a schematic diagram of the structure of Embodiment 6 of this application. Detailed Implementation
[0033] The technical features of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0034] Example 1
[0035] As shown in the figure, this utility model is a constant pressure gas supply device, including a pressure vessel 8 and a container 9 containing high-pressure gas. Container 9 is placed inside pressure vessel 8 and has a gas core. Container 9 is connected to a pressure control and release device, which cooperates with the gas core. Pressure vessel 8 has a conduit 801 inside it. One end of conduit 801 is located inside pressure vessel 8, and the other end of conduit 801 passes through the end wall of pressure vessel 8 and has a valve 802.
[0036] In this embodiment, pressure vessel 8 is filled with liquid media such as beer or beverages. When valve 802 is opened, the liquid media in pressure vessel 8 flows out of pressure vessel 8 through conduit 801. After the pressure inside pressure vessel 8 drops due to the outflow of liquid media, the pressure control release device pushes the gas core of container 9 to open, and container 9 replenishes pressurized gas into pressure vessel 8, so that pressure vessel 8 maintains a pressure that allows the liquid media to flow out autonomously.
[0037] In this embodiment, the volume ratio of container 2 9 to pressure container 1 8 is 1:30 to 1:10, wherein the volume of pressure container 1 8 can be from 3L to 1000L.
[0038] In this application, the pressure control and release device includes a housing 1, which covers the end of the container 9 that has an air core, and the air core is enclosed inside the housing 1. In this embodiment, the housing 1 is a cylindrical body, with its upper end closed and an opening at its lower end. The opening at the lower end of the housing 1 is snap-fitted and fixed to the container 9. The housing 1 can be made of metal by stamping or of plastic by injection molding.
[0039] As shown in the figure, the casing 1 has a piston 2 inside, which divides the interior of the casing 1 into two independent chambers, namely chamber 6 and chamber 7. Chamber 6 is connected to the interior of pressure vessel 8, and there is a channel 5 between chamber 6 and chamber 7 for unidirectional communication from chamber 6 to chamber 7.
[0040] In this embodiment, the channel 5 is constructed within the piston 2, and the mounting portion 502 is constructed on the surface of the piston 2. One end of the channel 5 opens onto the lower end face of the piston 2 facing the chamber 6 and communicates with the chamber 6. The other end of the channel 5 opens into the chamber 7 and has a unidirectional guiding component. Constructing the channel 5 within the piston 2 is a preferred choice for the technical solution of this application, which simplifies the structure and reduces costs.
[0041] In this embodiment, the unidirectional guiding component is a rubber cap 3. One end of the channel 5 located in the second chamber 7 is located on the side wall of the mounting part 502. The other end of the channel 5 located in the second chamber 7 may also be located on the top surface of the mounting part 502 or other surfaces.
[0042] A rubber cap 3 is fitted onto the mounting portion 502 and covers one end opening of the channel 5 located within the second chamber 7. The rubber cap 3 is tightened by the mounting portion 502, ensuring a tight contact between the rubber cap 3 and the mounting portion 502, applying pressure to the end opening of the channel 5. Without external force, the end opening of the channel 5 within the second chamber 7 is sealed by the rubber cap 3. Using the rubber cap 3 is a preferred option for the technical solution of this application, simplifying the structure and reducing cost.
[0043] The pressure difference between chamber 6 and chamber 7 pushes piston 2 to move within the casing 1 in a direction closer to or further away from the gas core. When piston 2 moves towards the gas core, it opens the gas core. An O-ring 4 is located between the side wall of piston 2 and the inner side wall of casing 1. The O-ring 4 is fixedly fitted onto piston 2, and piston 2 and casing 1 are slidably sealed by the O-ring 4. Through the sliding seal effect of the O-ring 4, chamber 6 and chamber 7 are formed as two independent, non-communicating cavities, and chamber 7 is relatively closed. Provided that the passage 5 is not open, chamber 7 is not connected to the outside.
[0044] In this embodiment, the mounting portion 502 is constructed on the top surface of the piston 2 facing the second chamber 7, and the mounting portion 502 extends from the top surface of the piston 2 toward the interior of the second chamber 7. The mounting portion 502 plays a certain limiting role, preventing the piston 2 from entering the interior top of the second chamber 7 and maintaining the space of the second chamber 7.
[0045] In this embodiment, after the cover 1 and the container 2 9 are snapped together, a gap can be reserved between the lower opening of the cover 1 and the container 2 9, and the chamber 1 6 communicates with the interior of the pressure vessel 1 8 through the gap between the lower opening of the cover 1 and the container 2 9.
[0046] The operating principle of this device is as follows:
[0047] In the initial state, the rubber cap 3 completely seals the orifice 5 due to its elasticity, and the piston 2 completely isolates chamber 1 6 and chamber 2 7 under the action of the O-ring 4 and the rubber cap 3.
[0048] After connecting the pressure relief device to container 2 (9), it is placed inside pressure container 1 (8). Pressure container 1 (8) is filled with liquid, and then gas is introduced into it until the pressure inside reaches 1 bar or more. Chamber 1 (6) is connected to the internal space of pressure container 1 (8), so at this point, the pressure inside chamber 1 (6) is equal to the pressure inside pressure container 1 (8). The pressure inside chamber 2 (7) is lower than the pressure inside chamber 1 (6). Under the action of the pressure difference, gas or liquid enters the channel and forces open the rubber cap 3, creating a gap between the rubber cap 3 and the mounting part 502. Gas or liquid enters chamber 2 (7) through this gap, causing the pressure in chamber 2 (7) to increase to equal pressure with chamber 1 (6). After the pressure in chamber 2 (7) equalizes with the internal pressure in chamber 1 (6), the pressure difference disappears, and the rubber cap 3, due to its own elasticity, tightly adheres to the mounting part 502, sealing the channel 5. Chamber 2 (7) is isolated from chamber 1 (6). At this point, the piston 2 is in a static state with balanced upper and lower pressures.
[0049] When valve 802 is opened, the liquid in pressure vessel 8 flows out through conduit 801 under pressure. At this time, the pressure inside chamber 6 and pressure vessel 8 decreases. When the pressure inside chamber 6 and pressure vessel 8 drops below that of chamber 7, the rubber cap 3, under the pressure inside chamber 7 and its own elasticity, tightly adheres to the mounting part 502, and the orifice 5 remains closed. The upper pressure of piston 2 is greater than the lower pressure, so piston 2 moves downward, which in turn presses down on the gas core of container 9. The high-pressure gas stored in container 9 is released and enters pressure vessel 8 through chamber 6, continuously providing pressure for liquid discharge.
[0050] When valve 802 is closed, the released gas causes the pressure inside chamber 6 and pressure vessel 8 to rise above the pressure in chamber 7. At this point, piston 2 moves upward and exerts no force on the gas core, and container 9 stops releasing gas.
[0051] After opening valve 802 again, repeat the above process until all the liquid is drained.
[0052] Example 2
[0053] The difference between this embodiment and embodiment 1 is that: in this embodiment, a groove is provided on the top surface of the piston 2, and the mounting part 502 is provided in the groove on the top surface of the piston 2. The top of the mounting part 502 can protrude from the upper opening of the groove on the top surface of the piston 2 or be located in the groove.
[0054] The lower opening of the cover 1 can also be sealed with the container 2 9. A through hole is opened on the lower side wall of the cover 1, and the chamber 1 6 communicates with the interior of the pressure vessel 1 8 through the through hole in the lower side wall of the cover 1.
[0055] Example 3
[0056] The difference between this embodiment and embodiment 1 is that: in this embodiment, a groove is provided on the side surface of the piston 2, and the mounting part 502 is provided in the groove on the side surface of the piston 2. The top end of the mounting part 502 can protrude from the opening of the groove on the side surface of the piston 2 or be located in the groove.
[0057] Example 4
[0058] The difference between this embodiment and Embodiment 1 is that in this embodiment, the channel 5 is constructed on the outside of the housing 1. The channel 5 is a U-shaped tube, and its two ends pass through the side wall of chamber one 6 and the side wall of chamber two 7, respectively.
[0059] The mounting part 502 is constructed inside the second chamber 7 and located on the inner surface of the cover 1. The mounting part 502 can be located on the inner top surface or the inner side surface of the cover 1, and the position of the mounting part 502 can be selected according to actual needs.
[0060] Example 5
[0061] The difference between this embodiment and Embodiment 1 is that in this embodiment, the channel 5 is constructed inside the housing 1. The two openings of the channel 5 are located in chamber 1 (6) and chamber 2 (7), respectively.
[0062] The mounting part 502 is constructed within the second chamber 7 and located on the inner surface of the cover 1. The mounting part 502 can be located on the inner top surface or the inner side surface of the cover 1, and the position of the mounting part 502 can be selected according to actual needs. One end opening of the channel 5 located within the second chamber 7 is provided on the surface of the mounting part 502.
[0063] Example 6
[0064] In this embodiment, the one-way conduction component is a one-way valve 501, which is installed at the end opening of the channel 5 or inside the channel 5.
[0065] Of course, the above description is not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.
Claims
1. A constant pressure gas supply device, comprising a pressure vessel (8) and a container (9) containing high-pressure gas; the container (9) is placed inside the pressure vessel (8), and the container (9) has a gas core; the container (9) is connected to a pressure control and release device, and the pressure control and release device cooperates with the gas core of the container (9); characterized in that: The pressure control release device includes a cover (1), which covers one end of the container (9) with an air core and encloses the air core inside the cover (1); The casing (1) has a piston (2) inside, which divides the interior of the casing (1) into two independent chambers, namely chamber one (6) and chamber two (7); chamber one (6) is connected to the interior of pressure vessel one (8); The first chamber (6) and the second chamber (7) have a channel (5) that allows unidirectional communication between the first chamber (6) and the second chamber (7); the pressure difference between the first chamber (6) and the second chamber (7) pushes the piston (2) to move in the cover (1) in the direction of approaching or moving away from the air core, and after the piston (2) moves towards the air core, it pushes the air core to open.
2. The constant pressure gas supply device according to claim 1, characterized in that: An O-ring (4) is provided between the side wall of the piston (2) and the inner side wall of the cover (1). The O-ring (4) is fixedly sleeved on the piston (2), and the piston (2) and the cover (1) are slidably sealed by the O-ring (4).
3. The constant pressure gas supply device according to claim 1, characterized in that: One end of the channel (5) is located inside chamber one (6) and communicates with chamber one (6), while the other end of the channel (5) is located inside chamber two (7) and communicates with chamber two (7).
4. The constant pressure gas supply device according to claim 1, characterized in that: It also includes a one-way flow component; the one-way flow component is a one-way valve (501), which is installed at the end opening of the channel (5) or inside the channel (5).
5. The constant pressure gas supply device according to claim 1, characterized in that: It also includes a one-way conduction component, which is a rubber cap (3); An installation part (502) is constructed at one end opening of the channel (5) in the second chamber (7). The end opening of the channel (5) in the second chamber (7) is located on the surface of the installation part (502). A rubber cap (3) is fitted onto the installation part (502) and covers the end opening of the channel (5) in the second chamber (7). The rubber cap (3) is pressed tightly against the mounting part (502).
6. The constant pressure gas supply device according to claim 3, characterized in that: The channel (5) is constructed within the piston (2); Alternatively, the channel (5) is constructed on the outside of the casing (1); Alternatively, the channel (5) is constructed within the casing (1).
7. The constant pressure gas supply device according to claim 1, characterized in that: The cover (1) is a closed shell with an internal cavity, and the lower end of the cover (1) has an opening; the opening at the lower end of the cover (1) is snapped and fixed to the container (9); There is a gap between the lower opening of the cover (1) and the container (9), and the chamber (6) communicates with the interior of the pressure vessel (8) through the gap between the lower opening of the cover (1) and the container (9); or, the lower opening of the cover (1) is sealed with the container (9), and there is a through hole on the lower side wall of the cover (1), and the chamber (6) communicates with the interior of the pressure vessel (8) through the through hole on the lower side wall of the cover (1).
8. The constant pressure gas supply device according to claim 1, characterized in that: The pressure vessel (8) has a conduit (801) inside, one end of which is located inside the pressure vessel (8), and the other end of which passes through the end wall of the pressure vessel (8) and has a valve (802).
9. The constant pressure gas supply device according to claim 1, characterized in that: The volume ratio of container two (9) to pressure vessel one (8) is 1:30-1:10, wherein the volume of pressure vessel one (8) is 3L to 1000L.