A pressure tank air replenishing device

Abstract

The present application discloses a pressure tank air replenishing device, belonging to the field of pressure equipment, which solves the problems that some pressure control and release devices in the prior art cannot be automatically operated, have a complex structure and a high cost. In the present application, a piston is provided inside the housing. The piston slides in the internal cavity of the housing and divides the internal cavity of the housing into two independent chambers, namely chamber one and chamber two. The opening of the housing communicates with chamber one, and the air core of container two is located in chamber one; Chamber one communicates with the inside of container one; The piston is arranged in cooperation with the air core of container two, and the air core is pushed to open after the piston slides from chamber two to chamber one; After the piston slides from chamber one to chamber two, chamber one communicates with chamber two. The pressure tank air replenishing device of the present invention realizes automatic air replenishing control, has a simple structure, a low cost, and has good usability and promotion prospects.

Description

Technical Field

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

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

[0003] In the prior art, in order to replenish air into the liquid pressure vessel, a pressure control release device is installed at the air core of a high-pressure gas tank to control the gas release of the high-pressure gas tank. Some pressure control release devices require external control and cannot automatically replenish air when the pressure in the liquid pressure vessel decreases. Moreover, most of the existing pressure control release devices have a relatively complex structure, resulting in a high cost. As a disposable item, the pressure control release device will cause relatively large waste. Summary of the Invention

[0004] The present invention provides a pressure tank air replenishing device, which realizes automatic air replenishing control, has a simple structure, a low cost, and has good usability and popularization.

[0005] The technical solution adopted by the present invention is a pressure tank air replenishing device, which includes a first container and a second container containing high-pressure gas; the second container is placed in the first container, the second container has an air core, the second container is connected with a pressure control release device and the pressure control release device cooperates with the air core of the second container;

[0006] The pressure control release device includes a housing, the housing has an internal cavity, and an opening communicating with the internal cavity of the housing is constructed at the lower end of the housing;

[0007] A piston is arranged in the housing, the piston slides in the internal cavity of the housing and divides the internal cavity of the housing into two independent chambers, the two independent chambers are respectively a first chamber and a second chamber, the opening of the housing communicates with the first chamber, and the air core of the second container is located in the first chamber; the first chamber communicates with the inside of the first container;

[0008] The piston is arranged in cooperation with the air core of the second container. After the piston slides from the second chamber to the first chamber, the air core is pushed to open; after the piston slides from the first chamber to the second chamber, the first chamber communicates with the second chamber.

[0009] Optimized, for the above-mentioned air supplement device for the pressure tank body, an O-ring seal is sleeved on the side wall of the piston opposite to the inner cavity of the shell; the O-ring seal is in sliding contact with the inner side wall of the inner cavity of the shell.

[0010] Optimized, for the above-mentioned air supplement device for the pressure tank body, the inner diameter of chamber one is smaller than the inner diameter of chamber two; the outer diameter of the piston is arranged in cooperation with the inner diameter of chamber one;

[0011] After the piston moves from chamber one to chamber two and enters chamber two, a communication channel is formed between chamber one and chamber two.

[0012] Optimized, for the above-mentioned air supplement device for the pressure tank body, a strip-shaped groove is constructed on the inner side wall of chamber two, and the length extension direction of the strip-shaped groove is arranged along the sliding direction of the piston;

[0013] After the piston moves from chamber one to chamber two and enters chamber two, chamber one and chamber two are communicated through the strip-shaped groove.

[0014] Optimized, for the above-mentioned air supplement device for the pressure tank body, a plurality of strip-shaped grooves are constructed on the inner side wall of chamber two, and the strip-shaped grooves are arranged in a ring around the piston.

[0015] Optimized, for the above-mentioned air supplement device for the pressure tank body, a spring is installed in chamber two; both ends of the spring are in tight contact with the inner top surface of chamber two and the piston respectively.

[0016] Optimized, for the above-mentioned air supplement device for the pressure tank body, fixing protrusions for fixing the spring are respectively constructed on the inner top surface of chamber two and the piston.

[0017] Optimized, for the above-mentioned air supplement device for the pressure tank body, a conduit is provided in container one, one end of the conduit is located in container one, and the other end of the conduit passes through the end wall of container one and is provided with a valve.

[0018] Optimized, for the above-mentioned air supplement device for the pressure tank body, the volume ratio of container two to container one is 1:30 - 1:10, and the volume of container one is 3L to 1000L.

[0019] The advantages of this application are as follows:

[0020] In the technical solution of this application, when the pressure in container one decreases, the pressure control release device can automatically actuate, open the air core of container two, and supplement air to container one, and the action is safe and reliable. And the pressure control release device of this application has a simple structure and low cost, and can effectively reduce the use cost of liquid pressure vessels. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of Embodiment 1 of this application;

[0022] Figure 2Schematic structural diagram of the pressure control release device in Embodiment 1 of the present application;

[0023] Figure 3 Schematic structural diagram of the pressure control release device in Embodiment 2 of the present application. Detailed implementation manners

[0024] The technical features of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0025] Embodiment 1

[0026] As shown in the figure, the present invention is a pressure tank air replenishment device, including container 1 and container 2 containing high-pressure gas. In this embodiment, container 1 is a liquid pressure vessel, and container 2 is a high-pressure gas tank. Container 1 has a conduit 309, one end of the conduit 309 is located inside container 1, and the other end of the conduit 309 passes through the end wall of container 1 and has a valve 306. The volume ratio of container 2 to container 1 is 1:30 - 1:10, where the volume of container 1 is 3L to 1000L.

[0027] The air core of container 2 is a push-type air core. After container 2 is connected to the pressure control release device and placed inside container 1, the air core of container 2 is pushed to open or close by the pressure control release device to replenish air inside container 1.

[0028] The pressure control release device includes a housing 301, the housing 301 has an internal cavity, and an opening communicating with the internal cavity of the housing 301 is constructed at the lower end of the housing 301.

[0029] The housing 301 has a piston 302, the piston 302 slides inside the internal cavity of the housing 301 and divides the internal cavity of the housing 301 into two independent chambers, the two independent chambers are chamber one and chamber two respectively, the opening of the housing 301 communicates with chamber one, and the air core of container 2 is located inside chamber one. A through hole is constructed on the side wall of chamber one to make chamber one communicate with the inside of container 1.

[0030] Internal threads are constructed on the inner wall at the opening of the housing 301, while external threads are constructed on the outer surface of the high-pressure gas tank of container 2. After the threaded end of container 2 with external threads is threadedly connected to the internal threads at the opening of the housing 301, the pressure control release device is installed on container 2. At this time, the air core of container 2 is inserted into chamber one and is located below the piston 302.

[0031] After the piston 302 slides from chamber two towards chamber one, it pushes the air core to open; after the piston 302 slides from chamber one towards chamber two, chamber one communicates with chamber two.

[0032] A piston 302 is sleeved with an O-ring seal 303 on the side wall opposite to the inner cavity of the housing 301, and the O-ring seal 303 is in sliding contact with the inner side wall of the inner cavity of the housing 301.

[0033] The inner diameter of chamber one is smaller than the inner diameter of chamber two, and the outer diameter of the piston 302 is arranged to fit the inner diameter of chamber one. When the piston 302 is located in chamber one, the piston 302 or the O-ring seal 303 fits against the inner wall of chamber one to block chamber one. At this time, chamber one and chamber two are isolated from each other.

[0034] When the piston 302 moves from chamber one to chamber two and enters chamber two, there is a gap between the piston 302 and chamber two. This gap serves as a communication channel between chamber one and chamber two, enabling chamber one and chamber two to communicate with each other.

[0035] A spring 305 is installed in chamber two; both ends of the spring 305 are in tight pressure contact with the inner top surface of chamber two and the piston 302 respectively. Fixed protrusions 307 for fixing the spring 305 are respectively formed on the inner top surface of chamber two and the piston 302.

[0036] The spring 305 serves as a reset power source for the piston 302. After the pressure in chamber one is insufficient to push the piston 302 towards chamber two, the spring 305 pushes the piston 302 back into chamber one, isolating chamber one and chamber two.

[0037] The operating principle of this device:

[0038] After connecting the pressure release device to the container two 2 and placing it in the container one 1, the container one 1 is filled with liquid, and then the container one 1 is inflated so that the internal pressure of the container one 1 reaches above 1 bar.

[0039] At this time, under the push of the external pressure, the piston 302 moves from chamber one towards chamber two and enters chamber two, allowing the liquid or gas in the container one 1 to enter chamber two, increasing the pressure in chamber two. When the pressure P2 in chamber two reaches the following formula value, P2 = P1 - F5 / S3 (where P2 is the pressure in chamber 2, P1 is the pressure in container 1, F is the spring force, and S is the cross-sectional area of the piston 302), the piston is in a static state.

[0040] When the valve 306 is opened, the liquid in the container one 1 will flow out along the conduit 309 under pressure. At this time, the pressure in chamber one and the internal pressure of the container one 1 decrease. The piston two 303 then moves downward under the pressure in chamber two and the action of the spring 305. At this time, it will press down the air core of the container two 2, and the high-pressure gas stored in the container two 2 will be released, continuously providing pressure for the liquid to flow out.

[0041] When the valve 306 is closed, the released gas causes the pressure in Chamber 1 and the interior of Container 1 to rise above the pressure in Chamber 2. Then the piston 302 moves upward, exerting no force on the gas core, and Container 2 stops releasing gas. When the valve 306 is opened again, the above process is repeated until all the liquid is discharged.

[0042] Embodiment 2

[0043] The difference between this embodiment and Embodiment 1 is that: several strip-shaped grooves 304 are formed on the inner side wall of Chamber 2. The strip-shaped grooves 304 are arranged in a ring around the piston 302, and the length extension direction of the strip-shaped grooves 304 is set along the sliding direction of the piston 302. After the piston 302 moves from Chamber 1 into Chamber 2, Chamber 1 and Chamber 2 are communicated through the strip-shaped grooves 304.

[0044] The only difference between this embodiment and Embodiment 1 is the pressure channel between Chamber 1 and Chamber 2 after the piston 302 moves. The working process of this embodiment is the same as that of Embodiment 1 and will not be elaborated here.

[0045] Certainly, 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 those of ordinary skill in the art within the scope of the essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A pressure tank air replenishing device, comprising a first container (1) and a second container (2) containing high-pressure gas; the second container (2) is placed inside the first container (1), the second container (2) has a gas core, the second container (2) is connected with a pressure control and release device, and the pressure control and release device cooperates with the gas core of the second container (2); characterized in that: The pressure control and release device includes a housing (301), the housing (301) has an internal cavity, and an opening communicating with the internal cavity of the housing (301) is constructed at the lower end of the housing (301); A piston (302) is arranged inside the housing (301), the piston (302) slides inside the internal cavity of the housing (301) and divides the internal cavity of the housing (301) into two independent chambers, the two independent chambers are respectively a first chamber and a second chamber, the opening of the housing (301) communicates with the first chamber, and the gas core of the second container (2) is located in the first chamber; the first chamber communicates with the inside of the first container (1); The piston (302) is arranged in cooperation with the gas core of the second container (2). After the piston (302) slides from the second chamber to the first chamber, it pushes the gas core to open; after the piston (302) slides from the first chamber to the second chamber, the first chamber communicates with the second chamber; A strip-shaped groove (304) is constructed on the inner side wall of the second chamber, and the length extension direction of the strip-shaped groove (304) is arranged along the sliding direction of the piston (302); After the piston (302) moves from the first chamber to the second chamber and enters the second chamber, the first chamber and the second chamber communicate with each other through the strip-shaped groove (304); A plurality of strip-shaped grooves (304) are constructed on the inner side wall of the second chamber, and the strip-shaped grooves (304) are arranged in a ring around the piston (302); A spring (305) is installed in the second chamber; the two ends of the spring (305) are respectively in pressing contact with the top end surface inside the second chamber and the piston (302); Fixed protrusions (307) for fixing the spring (305) are respectively constructed on the top end surface inside the second chamber and the piston (302); The volume ratio of the second container (2) to the first container (1) is 1:30 - 1:10, wherein the volume of the first container (1) is 3L to 1000L.

2. The air replenishing device for a pressure tank according to claim 1, wherein: An O-ring (303) is sleeved on the side wall of the piston (302) opposite to the internal cavity of the housing (301); the O-ring (303) is in sliding contact with the inner side wall of the internal cavity of the housing (301).

3. The air supplement device for the pressure tank according to claim 1, wherein: The inner diameter of the first chamber is smaller than the inner diameter of the second chamber; the outer diameter of the piston (302) is arranged in cooperation with the inner diameter of the first chamber; After the piston (302) moves from the first chamber to the second chamber and enters the second chamber, a communication channel is formed between the first chamber and the second chamber.

4. The air replenishing device for the pressure tank according to claim 1, characterized in that: A conduit (309) is arranged inside the first container (1), one end of the conduit (309) is located inside the first container (1), and the other end of the conduit (309) passes through the end wall of the first container (1) and is provided with a valve (306).

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