Constant-pressure air supply device

Abstract

The invention discloses a constant-pressure air supply device, belongs to the field of pressure equipment, and solves the problem that part of pressure control and release devices in the prior art are relatively high in cost due to more components and relatively complex structures. In the pressure control release device, the pressure control release device comprises a housing, the housing covers the end, provided with the gas core, of the second container, and the gas core is covered with the housing; a piston is arranged in the housing, the interior of the housing is divided into two independent cavities by the piston, and the two independent cavities are the first cavity and the second cavity respectively. The cavity I is communicated with the interior of the pressure container I; a hole channel which is in one-way conduction from the first cavity to the second cavity is formed between the first cavity and the second cavity; the pressure difference between the first cavity and the second cavity pushes the piston to move in the housing in the direction close to or away from the air core, and the piston pushes the air core to be opened after moving towards the air core. According to the constant-pressure air supply device, automatic air supply control is achieved, the number of parts is small, the structure is simple, cost is low, and good reliability is achieved.

Description

Technical Field

[0001] The invention relates to a constant-pressure air replenishing device, belonging to the field of pressure equipment. Background Art

[0002] In a liquid pressure container (such as a carbonated beverage can, etc.), after a portion of the liquid in the liquid pressure container is discharged, the pressure of the liquid pressure container will decrease, thereby affecting the discharge operation of the remaining liquid in the liquid pressure container. In order to maintain the stability of the internal pressure of the liquid pressure container and to discharge the remaining liquid in the liquid pressure container with sufficient pressure, air will be added to the liquid pressure container after a portion of the liquid is discharged to maintain the pressure in the liquid pressure container.

[0003] In the prior art, in order to replenish gas into the liquid pressure container, a pressure control release device is installed at the gas core of the high-pressure gas tank to control the gas release of the high-pressure gas tank. The existing pressure control release device mostly uses a one-way conduction structure with spring pressure supply to control the movement of the piston and the conduction of the pressure channel. It has many parts and a relatively complex structure, resulting in a high cost. The pressure control release device is a disposable item, which will cause great waste. Summary of the invention

[0004] The present invention provides a constant pressure air replenishing device, which realizes automatic air replenishing control, reduces components, simplifies structure, has low cost and good reliability.

[0005] The technical solution adopted by the present invention is a constant pressure gas replenishing device, comprising a pressure container 1 and a container 2 containing high pressure gas; the container 2 is placed in the pressure container 1, and the container 2 has a gas core; the container 2 is connected to a pressure control release device, and the pressure control release device cooperates with the gas core of the container 2;

[0006] The pressure control release device comprises a cover shell, which covers one end of the container 2 having the gas core and covers the gas core in the cover shell;

[0007] The housing has a piston inside, which divides the interior of the housing into two independent chambers, the two independent chambers being chamber one and chamber two; the chamber one is connected to the interior of the pressure vessel one;

[0008] There is a unidirectional channel between chamber one and chamber two, which conducts electricity from chamber one to chamber two. The pressure difference between chamber one and chamber two pushes the piston to move in the housing in a direction close to or away from the air core, and the piston moves toward the air core to open.

[0009] Optimally, in the above-mentioned constant-pressure air replenishing device, an O-ring is provided between the side wall of the piston and the inner wall of the housing, the O-ring is fixedly sleeved on the piston, and the piston and the housing are slidably sealed by the O-ring.

[0010] Optimally, in the above-mentioned constant-pressure air replenishing device, one end opening of the channel is located in chamber one and communicated with chamber one, and the other end opening of the channel is located in chamber two and communicated with chamber two.

[0011] Optimally, the above-mentioned constant pressure air replenishing device also includes a one-way conducting component; the one-way conducting component is a one-way valve (), and the one-way valve is installed at the end opening of the channel or installed in the channel.

[0012] Optimally, the above-mentioned constant pressure air replenishing device further includes a one-way conductive component, and the one-way conductive component is a rubber leather cap;

[0013] A mounting portion is constructed at the opening of 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 mounting portion, and a rubber cap is sleeved on the mounting portion and covers the opening of one end of the channel located in the second chamber;

[0014] The rubber cap is in tight contact with the mounting portion.

[0015] Optimally, in the above-mentioned constant pressure air supply device, the channel is constructed in the piston;

[0016] Or the hole is constructed on the outside of the housing;

[0017] Alternatively, the channel is constructed in the housing.

[0018] Optimally, in the above-mentioned constant pressure air replenishing device, the cover shell is a closed shell having an internal cavity, and the lower end of the cover shell has an opening; the opening at the lower end of the cover shell is fixedly connected with the container;

[0019] There is a gap between the lower end opening of the cover shell and container two, and chamber one is connected to the interior of pressure container one through the gap between the lower end opening of the cover shell and container two; or, the lower end opening of the cover shell and container two are sealed, and there is a through hole on the side wall of the lower section of the cover shell, and chamber one is connected to the interior of pressure container one through the through hole on the side wall of the lower section of the cover shell.

[0020] Optimally, the above-mentioned constant pressure air replenishing device has a conduit in pressure vessel one, one end of the conduit is located in pressure vessel one, and the other end of the conduit passes through the end wall of pressure vessel one and has a valve.

[0021] Optimized, in the above-mentioned constant pressure air replenishing device, the volume ratio of the container 2 to the pressure container 1 is 1:30-1:10, wherein the volume of the pressure container 1 is 3L to 1000L.

[0022] The advantages of this application are:

[0023] In the technical solution of the present application, only a channel is opened on the piston to connect chamber one and chamber two, and a rubber cap is used at the open end of the channel to control the opening and closing of the open end of the channel, so as to complete the pressure control between chamber one and chamber two, and then control the opening of the air core of container two by the piston. Compared with the existing control device, it has a simple structure, low production cost, and is suitable for disposable use.

[0024] The technical solution of the present application changes the situation in the prior art where the communication passages between chamber one and chamber two are located outside the piston, and the design purpose can be achieved simply by providing a hole in the piston, thereby greatly simplifying the design structure. BRIEF DESCRIPTION OF THE DRAWINGS

[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 Example 1 of the present application;

[0027] Figure 3 for Figure 2 Schematic diagram of the internal structure;

[0028] Figure 4 This is a schematic diagram of the structure of Example 2 of the present application;

[0029] Figure 5 This is a schematic diagram of the structure of Example 3 of the present application;

[0030] Figure 6 This is a schematic diagram of the structure of Example 4 of the present application;

[0031] Figure 7 This is a schematic diagram of the structure of Example 5 of the present application;

[0032] Figure 8 This is a structural diagram of Example 6 of the present application. DETAILED DESCRIPTION

[0033] The technical features of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] As shown in the figure, the present invention is a constant pressure gas replenishing device, comprising a pressure vessel 8 and a container 9 containing high pressure gas. The container 9 is placed in the pressure vessel 8, and the container 9 has a gas core. The container 9 is connected to a pressure control release device, and the pressure control release device cooperates with the gas core of the container 9. The pressure vessel 8 has a conduit 801, one end of which is located in the pressure vessel 8, and the other end of the conduit 801 passes through the end wall of the pressure vessel 8 and has a valve 802.

[0036] In this embodiment, the pressure vessel 8 is filled with liquid media such as beer and beverages. When the valve 802 is opened, the liquid medium in the pressure vessel 8 flows out of the pressure vessel 8 from the conduit 801. After the pressure in the pressure vessel 8 drops due to the outflow of the liquid medium, the pressure control release device pushes the gas core of the container 9 to open, and the container 9 replenishes the pressure gas in the pressure vessel 8, so that the pressure in the pressure vessel 8 is maintained to allow the liquid medium to flow out autonomously.

[0037] In this embodiment, the volume ratio of the container 2 9 to the pressure container 1 8 is 1:30-1:10, wherein the volume of the pressure container 1 8 can be 3L to 1000L.

[0038] In the present application, the pressure control release device includes a cover 1, which covers one end of the container 9 having the gas core and covers the gas core in the cover 1. In this embodiment, the cover 1 is a cylindrical barrel, the upper end of the cover 1 is closed, and an opening is set at the lower end of the cover 1, and the opening at the lower end of the cover 1 is clamped and fixed with the container 9. The cover 1 can be formed by metal stamping or integrally injected by plastic.

[0039] As shown in the figure, there is a piston 2 in the cover shell 1, and the piston 2 divides the interior of the cover shell 1 into two independent chambers. The two independent chambers are chamber 1 6 and chamber 2 7 respectively. Chamber 1 6 is connected to the interior of pressure vessel 1 8, and there is a channel 5 between chamber 1 6 and chamber 2 7, which is unidirectionally connected from chamber 1 6 to chamber 2 7.

[0040] In this embodiment, the channel 5 is constructed in the piston 2, and the mounting portion 502 is constructed on the surface of the piston 2. One end opening of the channel 5 is located on the lower end surface of the piston 2 facing the chamber 1 6 and communicates with the chamber 1 6, and the other end opening of the channel 5 is located in the chamber 2 7 and has a unidirectional conductive component. The channel 5 is constructed in the piston 2, which is a better choice of the technical solution of the present application, which can simplify the structure and has a lower cost.

[0041] In this embodiment, the one-way conductive component is a rubber cap 3, and the opening of one end of the channel 5 located in the chamber 2 7 is located on the side wall of the mounting portion 502. The opening of one end of the channel 5 located in the chamber 2 7 can also be located on other surfaces such as the top surface of the mounting portion 502.

[0042] The rubber cap 3 is sleeved on the mounting portion 502 and covers the opening of one end of the channel 5 located in the second chamber 7. The rubber cap 3 is tightened by the mounting portion 502, so that the rubber cap 3 is in tight contact with the mounting portion 502 and applies a certain pressure to the end opening of the channel 5. In the absence of external force, the opening of one end of the channel 5 located in the second chamber 7 is closed by the rubber cap 3. Using the rubber cap 3 is a preferred choice of the technical solution of the present application, which can simplify the structure and has a lower cost.

[0043] The pressure difference between chamber 1 6 and chamber 2 7 pushes piston 2 to move in the direction close to or away from the gas core in the housing 1. After piston 2 moves in the direction of the gas core, it pushes the gas core to open. An O-ring 4 is provided between the side wall of piston 2 and the inner wall of housing 1. O-ring 4 is fixedly sleeved on piston 2. O-ring 4 is used to slide and seal piston 2 and housing 1. The sliding sealing effect of O-ring 4 forms two independent cavities that are not connected between chamber 1 6 and chamber 2 7, and makes chamber 2 7 relatively closed. Under the premise that channel 5 is not conductive, chamber 2 7 is not connected to the outside world.

[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 inside of the second chamber 7. The mounting portion 502 plays a certain limiting role, preventing the piston 2 from entering the inner top of the second chamber 7 and maintaining the space of the second chamber 7.

[0045] In this embodiment, after the cover shell 1 and the container 2 9 are snapped together, a gap can be reserved between the lower end opening of the cover shell 1 and the container 2 9, and the chamber 1 6 is connected to the interior of the pressure container 1 8 through the gap between the lower end opening of the cover shell 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 channel 5 due to its elasticity, and the piston 2 completely isolates chamber 1 6 from chamber 2 7 under the action of the O-ring 4 and the rubber cap 3.

[0048] After the pressure release device is connected to the container 29, it is placed in the pressure container 18, and the pressure container 18 is filled with liquid. Then, the pressure container 18 is inflated to make the pressure of the internal space of the pressure container 18 reach more than 1 bar, and the chamber 16 is connected with the internal space of the pressure container 18, so at this time. At this time, the pressure of the chamber 16 and the internal space of the pressure container 18 are equal, and the pressure in the chamber 27 is lower than the pressure in the chamber 16. Under the action of the pressure difference, the gas or liquid enters the channel and breaks the rubber cap 3, so that a gap appears between the rubber cap 3 and the mounting part 502. The gas or liquid enters the chamber 27 from the gap between the rubber cap 3 and the mounting part 502, causing the pressure of the chamber 27 to increase to the same pressure as the chamber 16. After the pressure of the chamber 27 is equal to the internal pressure of the chamber 16, the pressure difference disappears, and the rubber cap 3 fits tightly on the mounting part 502 under the action of its own elastic force, closing the channel 5. The chamber 27 is isolated from the chamber 16. At this time, the upper and lower pressures of the piston 2 are balanced and in a static state.

[0049] When valve 802 is opened, the liquid in pressure container 8 will flow out along conduit 801 under pressure. At this time, the pressure in the internal space of chamber 16 and pressure container 8 drops. When the pressure in the internal space of chamber 16 and pressure container 8 drops to a level lower than that of chamber 27, rubber cap 3 fits tightly on mounting portion 502 under the internal pressure of chamber 27 and its own elastic force, and channel 5 remains closed. The upper pressure of piston 2 is greater than the lower pressure, and piston 2 moves downward, which will press down the gas core of container 29, and the high-pressure gas stored in container 29 will be released and enter pressure container 8 from chamber 16, continuously providing pressure for liquid extraction.

[0050] When valve 802 is closed, the released gas raises the pressure of the internal space of chamber 1 6 and pressure container 1 8 to a level greater than the pressure of chamber 2 7, and piston 2 moves upward, exerting no force on the gas core, and container 2 9 stops releasing gas.

[0051] When the valve 802 is opened again, the above process is repeated until all the liquid is discharged.

[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 portion 502 is provided in the groove on the top surface of the piston 2. The top end of the mounting portion 502 can protrude from the upper end opening of the groove on the top surface of the piston 2 and can also be located in the groove.

[0054] The lower end opening of the cover shell 1 and the container 2 9 can also be sealed. A through hole is opened on the side wall of the lower section of the cover shell 1, and the chamber 1 6 is connected to the interior of the pressure container 1 8 through the through hole of the side wall of the lower section of the cover shell 1.

[0055] Example 3

[0056] The difference between this embodiment and embodiment 1 is that in this embodiment, a groove is set on the side surface of the piston 2, and the mounting portion 502 is set in the groove on the side surface of the piston 2. The top end of the mounting portion 502 can protrude from the opening of the groove on the side surface of the piston 2 or can 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 the two ends of the channel 5 pass through the side wall of the chamber 1 6 and the side wall of the chamber 2 7 respectively.

[0059] The mounting portion 502 is constructed in the chamber 2 7 and is located on the inner surface of the housing 1. The mounting portion 502 can be located on the inner top surface or the inner side surface of the housing 1. The position of the mounting portion 502 is selected according to actual needs.

[0060] Example 5

[0061] The difference between this embodiment and the first embodiment is that in this embodiment, the channel 5 is constructed in the housing 1. The openings at both ends of the channel 5 are located in the chamber 1 6 and the chamber 2 7 respectively.

[0062] The mounting portion 502 is constructed in the second chamber 7 and is located on the inner surface of the housing 1. The mounting portion 502 can be located on the inner top surface or the inner side surface of the housing 1. The position of the mounting portion 502 is selected according to actual needs. The opening of one end of the channel 5 located in the second chamber 7 is set on the surface of the mounting portion 502.

[0063] Example 6

[0064] In this embodiment, the one-way conducting component is a one-way valve 501 , and the one-way valve 501 is installed at the end opening of the channel 5 or installed in the channel 5 .

[0065] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A constant pressure gas replenishing device, comprising a pressure container (8) and a container (9) containing high pressure gas; the container (9) is placed in the pressure container (8), and the container (9) has a gas core; the container (9) is connected to a pressure control release device and the pressure control release device cooperates with the gas core of the container (9); the characteristics are: The pressure control release device comprises a cover (1), the cover (1) covers one end of the container (9) having an air core and covers the air core in the cover (1); The housing (1) has a piston (2) therein, and the piston (2) divides the interior of the housing (1) into two independent chambers, the two independent chambers being chamber one (6) and chamber two (7); the chamber one (6) is in communication with the interior of pressure vessel one (8); A unidirectional passage (5) is provided between the chamber one (6) and the chamber two (7), which is connected from the chamber one (6) to the chamber two (7); the pressure difference between the chamber one (6) and the chamber two (7) pushes the piston (2) to move in the housing (1) in a direction approaching or moving away from the air core, and the piston (2) pushes the air core to open after moving in the direction of the air core.

2. The constant pressure air 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 wall of the housing (1); the O-ring (4) is fixedly sleeved on the piston (2); and a sliding seal is formed between the piston (2) and the housing (1) via the O-ring (4).

3. The constant pressure air supply device according to claim 1, characterized in that: One end opening of the channel (5) is located in chamber one (6) and communicates with chamber one (6), and the other end opening of the channel (5) is located in chamber two (7) and communicates with chamber two (7).

4. The constant pressure air supply device according to claim 1, characterized in that: It also includes a one-way conducting component; the one-way conducting component is a one-way valve (501), and the one-way valve (501) is installed at the end opening of the channel (5) or installed in the channel (5).

5. The constant pressure air supply device according to claim 1, characterized in that: It also includes a one-way conductive component, which is a rubber cap (3); The opening of one end of the hole (5) located in the second chamber (7) is formed with a mounting portion (502), the opening of the end of the hole (5) located in the second chamber (7) is located on the surface of the mounting portion (502), and the rubber cap (3) is sleeved on the mounting portion (502) and covers the opening of one end of the hole (5) located in the second chamber (7); The rubber cap (3) is in tight contact with the mounting portion (502).

6. The constant pressure air supply device according to claim 3, characterized in that: The hole (5) is constructed in the piston (2); Alternatively, the hole (5) is constructed on the outside of the housing (1); Alternatively, the channel (5) is constructed in the housing (1).

7. The constant pressure air supply device according to claim 1, characterized in that: The cover shell (1) is a closed shell having an internal cavity, and the lower end of the cover shell (1) has an opening; the opening at the lower end of the cover shell (1) is clamped and fixed to the container (9); There is a gap between the lower opening of the cover shell (1) and the second container (9), and the chamber one (6) is connected to the interior of the pressure container one (8) through the gap between the lower opening of the cover shell (1) and the second container (9); or, the lower opening of the cover shell (1) and the second container (9) are sealed, and a through hole is provided on the side wall of the lower section of the cover shell (1), and the chamber one (6) is connected to the interior of the pressure container one (8) through the through hole of the side wall of the lower section of the cover shell (1).

8. The constant pressure air supply device according to claim 1, characterized in that: The pressure vessel (8) has a conduit (801) inside, one end of the conduit (801) is located inside the pressure vessel (8), and the other end of the conduit (801) passes through the end wall of the pressure vessel (8) and has a valve (802).

9. The constant pressure air supply device according to claim 1, characterized in that: The volume ratio of the second container (9) to the first pressure container (8) is 1:30-1:10, wherein the volume of the first pressure container (8) is 3L to 1000L.

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