Wine barrel

Abstract

The present invention relates to the technical field of wine drinking devices, and provides a wine barrel. The present invention solves the problem of insufficient use reliability of existing wine barrels. The present wine barrel comprises a barrel body and a piston sleeve fixedly provided in the barrel body; a trigger disc is provided in the piston sleeve and a piston is slidably provided in the piston sleeve; a closed pressure cavity is formed between the upper side surface of the piston and the inner wall of the piston sleeve; elastic pieces extending upwards are provided on the trigger disc; the piston is provided with a clearance space used for accommodating the elastic pieces and enabling the piston to move downwards relative to the triggering disc; the piston sleeve is connected to a gas cylinder which is provided with a gas cylinder valve and can release gas into the barrel body when the gas cylinder valve is opened; a limiting sleeve located on the lower side of the piston is provided in the piston sleeve; and when the elastic pieces are located in the clearance space and the piston moves downwards to abut against the limiting sleeve, the elastic pieces are not pressed downwards by the piston. The wine barrel is used for avoiding gas waste caused by abnormal gas release by the gas cylinder.

Description

A wine barrel Technical Field

[0001] The invention belongs to the technical field of wine drinking equipment and relates to a wine barrel. Background Art

[0002] A wine barrel is a tool used to hold liquid wine, such as beer. Generally, a wine spear is provided at the mouth of the wine barrel, and the wine spear cooperates with a dispenser to draw out the beer in the wine barrel. In order to draw out the beer in the wine barrel, a traditional wine barrel usually installs a dispenser on the wine spear. The dispenser has a wine outlet and an air inlet, wherein the air inlet is externally connected to a carbon dioxide gas tank. When the dispenser is opened, the high-pressure gas in the carbon dioxide gas tank flows through the dispenser into the wine barrel, causing high pressure to be generated in the wine barrel, and the beer flows out through the wine outlet of the dispenser under the action of the high pressure. This type of wine barrel requires an external carbon dioxide gas tank, so if there is no matching carbon dioxide gas tank on site, the wine barrel cannot be used normally, resulting in the problem that the wine barrel is not convenient to use.

[0003] In view of the above deficiencies of the existing wine barrels, the applicant has previously developed a wine barrel with an embedded gas cylinder (application number: CN202311109762.0), which includes a barrel body, a gas cylinder is arranged in the barrel body, a piston hole is provided in the bottle mouth of the gas cylinder, a piston is slidably provided in the piston hole, and a closed pressure chamber is formed between the upper side of the piston and the inner wall of the piston hole. A trigger disk is also provided in the bottle mouth and is located on the lower side of the piston. An elastic sheet extending upward is provided on the main body of the trigger disk. The piston has an escape space for accommodating the elastic sheet and allowing the piston to move downward relative to the trigger disk. The upward movement of the piston can make the elastic sheet elastically recover and leave the escape space. After the elastic sheet leaves the escape space, the piston can press the elastic sheet downward and drive the trigger disk to move downward to open the gas cylinder valve. In actual use, this device has the following deficiencies:

[0004] During transportation and storage of this wine barrel, the elastic plate of the trigger disk is located within the relief space, meaning the barrel's pressure-regulating function is inactive. At this point, even if the piston moves downward, the cylinder valve will not open. This is because, under normal circumstances, downward piston movement gradually expands the pressure chamber, causing the pressure in the pressure chamber to gradually decrease. Consequently, when the pressure in the pressure chamber reaches the same level as the barrel's internal pressure, the piston stops moving downward. At this point, the piston's downward travel is insufficient to drive the trigger disk downward to open the cylinder valve. However, under certain circumstances, such as excessive pressure in the pressure chamber due to excessive inflation during manufacturing, or changes in the barrel's internal pressure due to environmental influences, such as when the barrel is transported to extremely cold northern regions or from low-altitude areas to high-altitude areas such as Tibet or Yunnan, the internal pressure can drop below the factory pressure, or even become negative. This can increase the piston's downward travel. Consequently, when the empty barrel is being transported or stored, the inner top wall of the relief space can push the elastic plate of the trigger disk downward, causing the cylinder valve to open abnormally, resulting in gas waste. Therefore, this wine barrel has the problem of insufficient reliability in use.

[0005] At present, in order to solve the occurrence of this problem, the conventional technical solution is: since the greater the downward stroke of the piston is during its downward movement, the lower the pressure in the pressure chamber is, therefore, it is usually considered to increase the length of the piston sleeve and the depth of the avoidance space, so that when the elastic sheet of the trigger disk is located in the avoidance space, the piston can move downward a larger stroke but will not press down on the elastic sheet, thus avoiding the abnormal opening of the gas cylinder valve. Summary of the Invention

[0006] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a wine barrel. The present invention solves the problem that during the transportation or storage of empty wine barrels, the gas cylinders in the wine barrels will abnormally release gas, causing gas waste and leading to insufficient reliability of the wine barrels.

[0007] The object of the present invention can be achieved through the following technical solutions: a wine barrel, comprising a barrel body and a piston sleeve fixedly arranged in the barrel body, the piston sleeve is provided with a trigger plate and a piston slidably arranged in the piston sleeve, a closed pressure chamber is formed between the upper side surface of the piston and the inner wall of the piston sleeve, the trigger plate has an elastic sheet extending upward, the piston has a avoidance space for accommodating the elastic sheet and allowing the piston to move downward relative to the trigger plate, the piston sleeve is connected to a gas cylinder with a cylinder valve and can release gas into the barrel body when the cylinder valve is opened, characterized in that a limiting sleeve is provided in the piston sleeve and is located at the lower side of the piston, the limiting sleeve has a cylindrical main body, the main body is provided with a positioning flange turned outward in the radial direction, the positioning flange is clamped between the upper end of the gas cylinder and the inner wall of the piston sleeve; when the elastic sheet is in the avoidance space and the piston moves downward to abut against the limiting sleeve, the elastic sheet is not pressed downward by the piston.

[0008] In this wine barrel, an escape space is provided on the piston. During the transportation and storage of the empty barrel, the elastic sheet is in the escape space. In this state, the pressure regulating function of the wine barrel is inactive. At this time, there is no high-pressure gas in the barrel body, and the piston will move downward under the pressure of the pressure chamber. However, during the downward movement of the piston, the elastic sheet on the trigger disk will only move relative to the inner wall of the escape space, and will not move downward with the piston to open the gas cylinder valve, thereby avoiding waste of gas in the gas cylinder.

[0009] This wine barrel incorporates a stopper sleeve within the piston sleeve. When the elastic sheet is within the clearance space and the piston moves downward, the piston abuts against the stopper sleeve after a certain distance, thereby limiting further downward movement. At this point, the elastic sheet is not pressed downward by the piston. This design prevents the piston from continuing to move downward, pushing the trigger plate downward and causing the cylinder valve to open abnormally, even when the pressure regulating function is not activated, even in the event of a drop in pressure or even negative pressure within the barrel. This design effectively prevents the cylinder from releasing gas abnormally and causing gas waste, resulting in a highly reliable operation. Furthermore, the stopper sleeve comprises a cylindrical main body with a radially outwardly projecting positioning flange. The positioning flange is sandwiched between the upper end of the cylinder and the inner wall of the piston sleeve, ensuring good mounting stability for the stopper sleeve. This provides a stable abutment for the piston, effectively limiting its downward travel, further enhancing the reliability of the wine barrel.

[0010] In the aforementioned wine barrel, the positioning flange is located at the lower end of the main body. An annular insertion groove is formed between the outer wall of the main body and the inner wall of the piston sleeve. The lower end of the piston has a cylindrical extension. When the elastic plate is within the clearance space, the extension fits into the insertion groove, and the lower end surface of the extension abuts against the upper side of the positioning flange. The provision of the cylindrical extension at the lower end of the piston extends the axial length of the piston, increasing the contact area between the piston and the piston sleeve, thereby enhancing the guiding effect of the piston sleeve on the piston, allowing the piston to move up and down stably. Furthermore, the design of the cylindrical extension also forms an annular insertion groove between the main body and the piston sleeve. To activate the wine barrel's pressure regulation function, a fixed amount of high-pressure gas is pumped into the barrel, gradually increasing the gas pressure within the barrel. This high-pressure gas then propels the piston upward, causing the elastic plate on the trigger plate to leave the clearance space, thereby activating the wine barrel's pressure regulation function. In this wine barrel, the extended part of the piston is matched with the plug-in groove, which can further improve the positioning accuracy of the piston. At the moment when the piston moves upward under the action of high-pressure gas, the piston can move upward accurately and smoothly, avoiding the phenomenon of piston deflection and jamming, thereby further improving the reliability of the use of this wine barrel.

[0011] In the aforementioned wine barrel, the trigger plate is slidably mounted within the main body. The lower end of the piston sleeve has a mounting opening. The upper end of the gas cylinder extends through the mounting opening into the piston sleeve and is clamped to the inner sidewall of the piston sleeve. The inner sidewall of the piston sleeve has a circumferentially arranged clamping surface. The upper end of the gas cylinder has an annular support surface, against which the lower side of the positioning flange abuts, and the outer edge of the upper side of the positioning flange abuts. This design ensures that the support surface on the gas cylinder provides excellent support for the positioning flange, and the support surface and clamping surface form a good clamping effect on the positioning flange, ensuring stable and precise installation of the stop sleeve. The gas cylinder's clamping mounting method improves installation convenience and makes the wine barrel more convenient to manufacture. The stop sleeve has a cylindrical main body, and the trigger plate is slidably mounted within the main body. This guides the trigger plate with the main body, ensuring stable upward and downward movement of the trigger plate. This design enables the stop sleeve to achieve both guiding and position-limiting functions, achieving multiple functions.

[0012] In the above-mentioned wine barrel, the upper end of the main body has a limit flange that is radially inwardly turned inward, and the limit flange can be used for the trigger plate to abut to limit the upward movement of the trigger plate. There is a gap between the upper side surface of the limit flange and the piston.

[0013] When activating the pressure regulating function of the wine barrel, a fixed amount of high-pressure gas needs to be filled into the barrel. During this process, the trigger disc will also be pushed by the high-pressure gas. By providing a limiting flange at the upper end of the main body, the limiting flange limits the upward movement of the trigger disc, thereby ensuring that the high-pressure gas will not move the trigger disc upward when pushing the piston upward, and the trigger disc will not continue to move upward due to the action of the high-pressure gas, thereby ensuring that the elastic sheet on the trigger disc can smoothly leave the avoidance space, avoiding the situation of activation failure, and making the use of the wine barrel more stable and reliable. There is a gap between the upper side of the limiting flange and the piston, so that when the piston moves downward, the piston can rest on the positioning flange without resting on the limiting flange. At this time, because the positioning flange is supported by the support surface of the upper end of the gas cylinder, compared with the situation where the piston rests on the limiting flange, the limiting sleeve will have a more stable posture when the piston rests on the positioning flange, so that the limiting sleeve can always maintain good stability, thereby improving the reliability of the wine barrel.

[0014] In the above-mentioned wine barrel, an exhaust chamber is formed between the piston and the upper end of the gas cylinder, which can be connected with the inner cavity of the gas cylinder when the gas cylinder valve is opened. A plurality of ventilation notches are arranged in sequence along the circumferential direction on the limit sleeve. The upper end of the ventilation notch passes through the inner wall and the outer wall of the main body along the radial direction of the limit sleeve, and the lower end of the ventilation notch passes through the inner edge and the outer edge of the positioning flange along the radial direction of the limit sleeve. The plug-in groove is connected with the inner cavity of the barrel body.

[0015] This design enables the plug-in groove to also have a gas circulation function, so that when the cylinder valve is opened, the gas in the cylinder cavity can enter the barrel body through the exhaust cavity, the vent notch, and the plug-in groove in sequence, so that when the air pressure in the barrel body drops, the gas can be replenished in time to the barrel body, so that the air pressure in the barrel body is maintained within a certain range to meet the requirements of wine output. Among them, the lower end of the vent notch radially penetrates the inner edge and outer edge of the positioning flange, and the upper end of the vent notch radially penetrates the inner side wall and outer side wall of the main body. This design not only allows the vent notch to connect the exhaust cavity and the plug-in groove, but also increases the gas flow area of ​​the vent notch, thereby increasing the gas flow rate, so that when the air pressure in the barrel body drops, the air pressure in the barrel body can be quickly restored after the cylinder valve is opened. In this way, the pressure regulation function of this wine barrel has the advantages of high regulation efficiency and strong practicality, thereby improving the stability of wine output from the wine barrel.

[0016] In the aforementioned wine barrel, the inner sidewall of the piston sleeve is circumferentially provided with a plurality of ventilation grooves, through which the insertion groove communicates with the inner cavity of the barrel body. Preferably, three ventilation grooves are provided. The multiple ventilation grooves improve gas flow, resulting in a highly efficient pressure regulation function for the wine barrel. The use of ventilation grooves to connect the insertion groove with the inner cavity of the barrel body not only ensures smooth gas flow but also offers the advantages of easy processing and low manufacturing costs.

[0017] In the above-mentioned wine barrel, the piston includes a piston body and a stopper. The piston body includes a cylindrical main body and a relief portion located inside the main body. The lower end of the main body forms the extension portion. The stopper is located below the relief portion and is fixedly connected to the piston body. The relief portion has an upper relief hole with a closed top and an open lower end. The stopper is provided with a lower relief hole that passes through both ends along the sliding direction of the piston. The upper and lower relief holes are aligned and connected to form the relief space. By arranging the stopper below the piston body, the upper and lower relief holes are aligned and connected to form the relief space. This design can increase the depth of the relief space, so that when the pressure regulating function of the wine barrel is in an inactive state, the piston has a larger floating stroke, thereby reducing the risk of the elastic sheet accidentally falling out of the relief space during transportation and storage of the empty barrel, making the pressure regulating function of the wine barrel more reliable. The cylindrical body can increase the contact area between the piston and the piston sleeve, thereby increasing the guiding effect of the piston sleeve on the piston, so that the piston can move up and down stably.

[0018] In the above-mentioned wine barrel, the abutment member includes a cylindrical outer cylinder and an inner sleeve located inside the outer cylinder and concentrically arranged with the outer cylinder. The inner hole of the inner sleeve forms the lower avoidance hole. The diameter of the lower end of the inner sleeve gradually decreases from top to bottom and forms a necked shape. An annular groove with a downward notch and arranged around the outer periphery of the inner sleeve is formed between the outer cylinder and the inner sleeve. After the elastic sheet leaves the avoidance space, the upper end of the elastic sheet can enter the annular groove.

[0019] The diameter of the lower end of the inner sleeve gradually decreases from top to bottom and forms a necked shape, so that when the pressure regulating function of the wine barrel is not activated and the elastic sheet is in the upper avoidance hole, the elastic sheet is in a freely open state and is not squeezed by the inner wall of the upper avoidance hole. When the pressure regulating function is activated and the piston moves upward until the elastic sheet contacts the lower end of the inner sleeve, the spring sheet will be squeezed by the necked lower end and shrink and deform, and then automatically open and enter the annular groove when it detaches from the lower end.

[0020] In conventional designs, the lower opening of the escape space is a straight cylindrical structure, rather than a tapered opening. Therefore, when the pressure regulating function of the wine barrel is not activated and the elastic sheet is within the escape space, the elastic sheet is constantly under pressure. This prolonged pressure can cause the elastic sheet to deform, preventing it from properly opening when triggered. This prevents the elastic sheet from automatically expanding into the annular groove, leading to unsuccessful triggering. However, the present wine barrel's tapered lower end design of the inner sleeve effectively avoids this problem of unsuccessful triggering of the elastic sheet, making the present wine barrel highly reliable.

[0021] In the aforementioned wine barrel, when the elastic sheet is within the escape space and the piston moves downward to abut the stop sleeve, a gap exists between the upper end of the elastic sheet and the inner top wall of the upper escape hole. This design ensures that when the pressure regulation function is not activated, even if the barrel experiences a drop in pressure or even negative pressure under certain circumstances, the piston will not exert downward pressure on the elastic sheet, thereby preventing the piston from pushing the trigger plate downward and causing the cylinder valve to open abnormally.

[0022] In the aforementioned wine barrel, when the upper end of the elastic sheet is within the annular groove, the entire extension portion is located outside the insertion groove. When the upper end of the elastic sheet is within the annular groove, the barrel's pressure regulation function is activated. As the piston moves downward to open the cylinder valve, the insertion groove allows gas to circulate. At this point, the entire extension portion is removed from the insertion groove, allowing gas to flow through the insertion groove without being blocked by the extension portion. This increases gas flow and allows the air pressure within the barrel to recover quickly. This gives the barrel's pressure regulation function the advantages of high regulation efficiency and strong practicality, thereby improving the stability of wine delivery from the barrel.

[0023] In the aforementioned wine barrel, the trigger disc slides within the main body. The upper end of the main body features a radially inward-folding limit flange. This limit flange acts as abutment for the trigger disc, limiting its upward travel. When the elastic sheet is within the clearance space, the piston can move downward until it abuts the upper side of the limit flange. This design, by abutting the piston with the upper side of the limit flange to limit its downward travel, prevents the cylinder valve from opening unexpectedly when the pressure regulation function is inactive.

[0024] Compared with the existing technology, this wine barrel has the following advantages:

[0025] 1. By incorporating an additional stopper sleeve within the piston sleeve, this wine barrel prevents the piston from continuously moving downward, pushing the trigger plate downward and causing the cylinder valve to open abnormally, even if the pressure regulation function is not activated, even under certain circumstances causing a drop in pressure or even negative pressure within the barrel. Therefore, this wine barrel design effectively prevents gas waste caused by abnormal gas release from the cylinder, making it highly reliable.

[0026] 2. In this wine barrel, the diameter of the lower end of the inner sleeve gradually decreases from top to bottom and forms a constricted shape, which can prevent the elastic sheet from being under pressure all the time, thereby effectively avoiding the problem of unsuccessful triggering of the elastic sheet, making this wine barrel highly reliable in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a cross-sectional view of the wine barrel.

[0028] FIG2 is a partial cross-sectional view of the wine barrel when the pressure regulating function is not activated.

[0029] FIG3 is a schematic diagram of the three-dimensional structure of the limiting sleeve.

[0030] FIG4 is a schematic diagram of the three-dimensional structure of the piston sleeve.

[0031] FIG5 is a partial cross-sectional view of the wine barrel after the pressure regulating function is activated.

[0032] Figure 6 is a partial cross-sectional view of the wine barrel when the piston moves downward to open the cylinder valve.

[0033] FIG7 is a perspective sectional view of a piston.

[0034] FIG8 is a partial cross-sectional view of the wine barrel in Example 2 when the pressure regulating function is not activated.

[0035] In the figure, 1. barrel; 2. piston sleeve; 21. mounting opening; 22. clamping surface; 23. vent groove; 24. clamping strip; 3. trigger plate; 31. elastic sheet; 4. piston; 41. piston body; 411. body; 411a. extension portion; 412. avoidance portion; 42. abutment member; 421. outer cylinder; 422. inner sleeve; 5. pressure chamber; 6. avoidance space; 61. upper avoidance hole; 62. lower avoidance hole; 7. gas cylinder; 71. gas cylinder valve; 711. valve body ; 712, valve core; 713, spring; 72, support surface; 73, bottle body; 731, convex ring; 74, bottle cap; 741, annular groove body; 742, annular flange; 75, sealing gasket; 8, limiting sleeve; 81, main body; 82, positioning flange; 83, limiting flange; 84, ventilation gap; 9, plug-in groove; 10, exhaust chamber; 11, annular groove; 12, wine outlet pipe; 13, wine outlet valve; 14, connecting piece; 15, sealing ring; 16 gap; H, interval. DETAILED DESCRIPTION

[0036] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0037] Example 1

[0038] As shown in Figure 1, the beer barrel comprises a barrel body 1 and a piston sleeve 2 fixedly mounted within the barrel body 1. A beer outlet valve 13 is connected to the barrel opening of the barrel body 1. The beer outlet valve 13 is connected to a beer outlet pipe 12 extending to the bottom of the inner cavity of the barrel body 1. The beer outlet valve 13 is connected to a connector 14 located within the barrel body 1. The piston sleeve 2 is snap-connected to the connector 14. When the beer outlet valve 13 is opened, the beer in the barrel body 1 can flow out through the beer outlet pipe 12 and the beer outlet valve 13 under the action of the high-pressure gas within the barrel body 1 for people to drink.

[0039] As shown in Figures 1 and 2, a trigger disc 3 is provided in the piston sleeve 2 and a piston 4 is slidably provided thereon. A closed pressure chamber 5 is formed between the upper side of the piston 4 and the inner wall of the piston sleeve 2. The trigger disc 3 has an elastic sheet 31 extending upward, and the piston 4 has a relief space 6 for accommodating the elastic sheet 31 and allowing the piston 4 to move downward relative to the trigger disc 3. The piston sleeve 2 is connected to a gas cylinder 7 having a gas cylinder valve 71 and capable of releasing gas into the barrel 1 when the gas cylinder valve 71 is opened. The piston sleeve 2 A limiting sleeve 8 is provided on the lower side of the piston 4. The limiting sleeve 8 has a cylindrical main body 81. The main body 81 is provided with a positioning flange 82 that is radially turned outward. The positioning flange 82 is sandwiched between the upper end of the gas cylinder 7 and the inner wall of the piston sleeve 2. As shown in Figure 2, when the elastic sheet 31 is in the avoidance space 6 and the piston 4 moves downward to abut against the limiting sleeve 8, there is a gap H between the upper end of the elastic sheet 31 and the top wall of the avoidance space 6, so the elastic sheet 31 is not pressed downward by the piston 4. This design ensures that when the pressure regulating function of the wine barrel is not activated, even if some special circumstances cause the air pressure in the barrel body 1 to drop or even to form a negative pressure, the piston 4 will not exert downward pressure on the elastic sheet 31, thereby preventing the piston 4 from pushing the trigger plate 3 downward and causing the gas cylinder valve 71 to open abnormally.

[0040] As shown in Figures 2 and 3, the positioning flange 82 is located at the lower end of the main body 81. An annular insertion groove 9 is formed between the outer wall of the main body 81 and the inner wall of the piston sleeve 2. The lower end of the piston 4 has a cylindrical extension portion 411a, which is matched and inserted into the insertion groove 9. When the elastic sheet 31 is in the avoidance space 6, the piston 4 can move downward until the lower end surface of the extension portion 411a abuts against the upper side of the positioning flange 82. The upper end of the main body 81 has a radially inward-folded limiting flange 83. The limiting flange 83 can be abutted by the trigger disk 3 to limit the upward movement stroke of the trigger disk 3. A gap 16 is formed between the upper side of the limiting flange 83 and the piston 4.

[0041] As shown in Figures 2 and 4, the trigger plate 3 is slidably mounted within the main body 81. The lower end of the piston sleeve 2 has a mounting opening 21. The upper end of the gas cylinder 7 extends through the mounting opening 21 into the piston sleeve 2 and is secured to the inner sidewall of the piston sleeve 2. The gas cylinder 7 comprises a body 73 and a cap 74 disposed at the mouth of the body 73. The gas cylinder valve 71 is secured at the center of the cap 74. The cap 74 has a downwardly recessed annular groove 741 in the area between its outer and inner edges. The outer edge of the cap 74 is bent downward to form an annular flange 742. The rim of the mouth of the body 73 has an outwardly protruding ring 731, which is embedded and secured between the flange 742 and the annular groove 741. The ring 731 is typically tightly fitted with the annular groove 741. A sealing gasket 75 is disposed between the upper surface of the ring 731 and the cap 74. The raised ring 731 not only increases the structural strength of the bottle mouth 73, ensuring a stable fixation of the bottle cap 74 to the bottle body 73, but also ensures a seal between the bottle cap 74 and the bottle body 73. The inner sidewall of the lower end of the piston sleeve 2 is provided with a protruding, arcuate retaining strip 24. Several retaining strips 24 are arranged circumferentially, typically two, three, or four. When the upper end of the gas cylinder 7 extends into the piston sleeve 2 through the mounting opening 21, the annular flange 742 engages with the retaining strip 24, positioning the flange 742 above and axially abutting the retaining strip 24. The inner sidewall of the piston sleeve 2 is provided with a circumferentially arranged clamping surface 22. The upper end of the gas cylinder 7 is provided with an annular support surface 72, which is disposed on the upper side of the bottle cap 74. The lower side of the positioning flange 82 abuts the support surface 72, while the outer edge of the upper side of the positioning flange 82 abuts the clamping surface 22. Through such a design, the supporting surface 72 on the gas cylinder 7 can form a good supporting effect on the positioning flange 82, and then the supporting surface 72 and the clamping surface 22 can form a good clamping effect on the positioning flange 82, ensuring that the limiting sleeve 8 has good installation stability and high installation accuracy.

[0042] As shown in Figures 3, 5, and 6, when the upper end of the elastic sheet 31 is within the annular groove 11, the entire extension 411a is located outside the insertion groove 9. An exhaust chamber 10 is formed between the piston 4 and the upper end of the gas cylinder 7, which is connected to the inner cavity of the gas cylinder 7 when the gas cylinder valve 71 is opened. A plurality of venting notches 84 are circumferentially spaced apart on the retaining sleeve 8. The upper ends of the venting notches 84 extend radially through the inner and outer walls of the main body 81, while the lower ends of the venting notches 84 extend radially through the inner and outer edges of the positioning flange 82. As shown in Figure 4, a plurality of venting grooves 23 are circumferentially formed on the inner sidewall of the piston sleeve 2. The insertion groove 9 communicates with the inner cavity of the barrel 1 through the venting grooves 23. In this embodiment, there are four venting notches 84. In actual manufacturing, the number of venting notches 84 can be appropriately increased or decreased, such as two, three, five, or six. Meanwhile, the number of the vent grooves 23 is three, and the number of the vent grooves 23 can also be increased or decreased appropriately.

[0043] As shown in Figure 7, the piston 4 includes a piston body 41 and a supporting member 42. The piston body 41 includes a cylindrical body 411 and a avoidance portion 412 located on the inner side of the body 411. The lower end of the body 411 forms an extension portion 411a. The avoidance portion 412 has an upper avoidance hole 61 with a closed top and an open lower end. The supporting member 42 is provided with a lower avoidance hole 62 that passes through both ends along the sliding direction of the piston 4. The supporting member 42 is located on the lower side of the avoidance portion 412 and is clamped and connected to the piston body 41. The upper avoidance hole 61 and the lower avoidance hole 62 are aligned and connected up and down and together form a avoidance space 6. The top wall of the avoidance space 6 is the inner top wall of the upper avoidance hole 61. The abutment member 42 includes a cylindrical outer cylinder 421 and an inner sleeve 422 located on the inner side of the outer cylinder 421 and concentrically arranged with the outer cylinder 421. The inner hole of the inner sleeve 422 forms a lower avoidance hole 62. The diameter of the lower end of the inner sleeve 422 gradually decreases from top to bottom and forms a constricted shape. A ring groove 11 with a downward notch and arranged around the outer periphery of the inner sleeve 422 is formed between the outer cylinder 421 and the inner sleeve 422. As shown in Figure 6, after the elastic sheet 31 leaves the avoidance space 6, the upper end of the elastic sheet 31 can enter the annular groove 11 and abut against the bottom of the annular groove 11.

[0044] As shown in Figures 2 and 6, the gas cylinder valve 71 includes a valve body 711 with a valve hole fixedly installed at the center of the bottle cap 74. The upper end of the valve body 711 is inserted into and fixed on the annular groove body 241 of the bottle cap 74, and a sealing ring 15 is fixed between the upper end of the valve body 711 and the inner edge of the bottle cap 74. A tubular valve core 712 is vertically slidably inserted into the inner edge of the valve hole of the valve body 711, and the upper end of the valve core 712 extends upward from the valve body 711. The inner bore of the valve core 712 has a partition wall, dividing it into an upper blind hole and a lower blind hole. A vent hole communicating with the bottom of the upper blind hole is formed on the outer surface of the valve core 712. A stop shoulder is provided on the outer surface of the valve core 712, below the vent hole. A spring 713 is also provided within the valve body 711, acting upward on the valve core 712. Under the action of the spring 713, the stop shoulder of the valve core 712 presses upward against the inner edge of the bottle cap 74, while the inner side of the sealing ring 15 abuts against the outer side of the stop shoulder, forming a seal. The inner diameter of the bottle cap 74 is smaller than the outer diameter of the stop shoulder. The inner edge of the bottle cap 74 acts as an axial limiter for the valve core 712, preventing it from dislodging from the valve body 711. The trigger disc 3 forms a clamping hole extending through its lower end between the two elastic sheets 31. The trigger disc 3 also has a retaining ring with a center hole located above the retaining hole. The upper end of the valve core 712 passes through the retaining hole and, under the action of the spring 713, presses upward against the lower end surface of the retaining ring. The center hole of the retaining ring is opposite to and communicates with the upper blind hole of the valve core 712. When the trigger disc 3 pushes the valve core 712 downward via the retaining ring, the retaining shoulder disengages from the sealing ring 15, opening the valve hole of the valve body 711. This opens the gas outlet passage of the gas cylinder valve 71, allowing the valve hole of the valve body 711 to communicate with the upper blind hole of the valve core 712 via the vent hole. Gas in the gas cylinder 7 can enter the piston cap 9 through the gas cylinder valve 71.

[0045] The following describes the working principle of this wine barrel in conjunction with the accompanying drawings:

[0046] The pressure regulating function is in an inactive state: In this wine barrel, an escape space 6 is provided on the piston 4. During the transportation and storage of the empty barrel, as shown in FIG2 , the elastic sheet 31 is in the escape space 6. In this state, the pressure regulating function of the wine barrel is in an inactive state. At this time, there is no high-pressure gas in the barrel body 1, and the piston 4 will move downward under the pressure of the pressure chamber 5. However, during the downward movement of the piston 4, the elastic sheet 31 on the trigger plate 3 will only slide along the inner wall of the escape space 6, and will not move downward with the piston 4 to open the gas cylinder valve 71, thereby avoiding the waste of gas in the gas cylinder 7. Even if certain special circumstances cause the gas pressure in the barrel body 1 to decrease or even to produce negative pressure, since the limit sleeve 8 can limit the downward movement of the piston 4, when the pressure regulating function of the wine barrel is not activated, the piston 4 will not press down on the elastic sheet 31 and push the trigger plate 3 downward to cause the gas cylinder valve 71 to open abnormally.

[0047] Activate the pressure regulating function: When the wine barrel is delivered to the customer, the user needs to fill a certain amount of high-pressure gas into the barrel body 1 to activate the pressure regulating function. At this time, since the exhaust chamber 10 is connected to the inner cavity of the barrel body 1, the high-pressure gas filled in the barrel body 1 will enter the exhaust chamber 10 and push the piston 4 to move upward. After the piston 4 moves upward, the elastic sheet 31 will leave the avoidance space 6. As shown in Figure 5, after the elastic sheet 31 leaves the avoidance space 6, the pressure regulating function of the wine barrel is activated. At this time, the upper end of the elastic sheet 31 is located in the annular groove 11, and the sealing ring 15 blocks the air outlet channel of the gas cylinder valve 71.

[0048] As shown in Figure 6, when the pressure in the barrel body 1 decreases, the pressure in the exhaust chamber 10 decreases accordingly. At this time, the piston 4 can press the elastic sheet 31 downward and drive the trigger disk 3 to move downward to push the cylinder valve 71 downward, so that the sealing ring 15 no longer blocks the gas outlet channel of the cylinder valve 71. At this time, the cylinder valve 71 is opened, and the gas in the cylinder 7 passes through the exhaust chamber 10, the vent notch 84, and the plug-in groove 9 in turn into the barrel body 1, so that the gas pressure in the barrel body 1 increases. After the gas pressure increases to the set value, it will push the piston 4 to move upward and close the cylinder valve 71, as shown in Figure 5. In this way, the gas pressure in the barrel body 1 is maintained within a certain range to meet the requirements of wine discharge.

[0049] Example 2

[0050] This embodiment has essentially the same structure and principle as the first embodiment, differing in that, as shown in FIG8 , the upper end of the main body 81 has a radially inwardly folded limit flange 83. This limit flange 83 serves as abutment for the trigger disk 3 to limit its upward travel. When the elastic sheet 31 is within the escape space 6 , the piston 4 can move downward until it abuts the upper side of the limit flange 83. This design prevents the cylinder valve 71 from opening abnormally when the pressure regulating function is inactive by abutting the upper side of the limit flange 83 against the piston 4 to limit its downward travel.

[0051] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0052] Although this article uses the terms such as 1. barrel body; 2. piston sleeve; 21. installation opening; 22. clamping surface; 23. ventilation groove; 3. trigger disk; 31. elastic sheet; 4. piston; 41. piston body; 411. main body; 411a. extension part; 412. avoidance part; 42. abutment member; 421. outer cylinder; 422. inner sleeve; 5. pressure chamber; 6. avoidance space; 61. upper avoidance hole; 62. lower avoidance hole; 7. gas cylinder; 71. gas cylinder valve; 72. supporting surface; 8. limiting sleeve; 81. main body; 82. positioning flange; 83. limiting flange; 84. ventilation notch; 9. plug-in groove; 10. exhaust chamber; 11. annular groove; 12. wine outlet pipe; 13. wine outlet valve; 14. connecting piece; 15. sealing ring more frequently, it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; any additional limitation construed in them would be contrary to the spirit of the present invention.

Claims

1. A wine barrel, comprising a barrel body (1) and a piston sleeve (2) fixedly arranged inside the barrel body (1). A trigger disc (3) is arranged inside the piston sleeve (2), and a piston (4) is slidably arranged. A sealed pressure chamber (5) is formed between the upper side surface of the piston (4) and the inner wall of the piston sleeve (2). The trigger disc (3) has an elastic piece (31) extending upward. The piston (4) has an avoidance space (6) for accommodating the elastic piece (31) and enabling the piston (4) to move downward relative to the trigger disc (3). The piston sleeve (2) is connected with a gas cylinder (7) having a gas cylinder valve (71), and when the gas cylinder valve (71) is opened, the gas cylinder (7) can release gas into the barrel body (1). It is characterized in that, A limiting sleeve (8) is provided inside the piston sleeve (2) and is located below the piston (4). The limiting sleeve (8) has a cylindrical main body portion (81). A positioning flange (82) that turns outwards radially is provided on the main body portion (81). The positioning flange (82) is clamped between the upper end of the gas cylinder (7) and the inner wall of the piston sleeve (2). When the elastic piece (31) is in the avoidance space (6) and the piston (4) moves downwards to abut against the limiting sleeve (8), the elastic piece (31) is not pressed downwards by the piston (4).

2. The cask according to claim 1, wherein, The positioning flange (82) is located at the lower end of the main body portion (81). An annular insertion groove (9) is formed between the outer side wall of the main body portion (81) and the inner side wall of the piston sleeve (2). The lower end of the piston (4) has a cylindrical extension portion (411a). When the elastic piece (31) is in the avoidance space (6), the extension portion (411a) can be inserted into the insertion groove (9) in a matching manner and the lower end surface of the extension portion (411a) can abut against the upper side surface of the positioning flange (82).

3. The cask according to claim 1 or 2, characterized in that, The trigger disc (3) is slidably arranged inside the main body portion (81). The lower end of the piston sleeve (2) has an installation opening (21). The upper end of the gas cylinder (7) extends into the piston sleeve (2) through the installation opening (21) and is clamped and fixed on the inner side wall of the piston sleeve (2). The inner side wall of the piston sleeve (2) has a circumferentially arranged clamping surface (22). The upper end of the gas cylinder (7) has an annular support surface (72). The lower side surface of the positioning flange (82) abuts against the support surface (72), and the outer edge of the upper side surface of the positioning flange (82) abuts against the clamping surface (22).

4. The cask according to claim 3, characterized in that, The upper end of the main body portion (81) has a limiting flange (83) that turns inwards radially. The limiting flange (83) can be abutted by the trigger disc (3) to limit the upward movement stroke of the trigger disc (3). There is a gap (16) between the upper side surface of the limiting flange (83) and the piston (4).

5. The cask according to claim 2, characterized in that, An exhaust cavity (10) that can communicate with the inner cavity of the gas cylinder (7) when the gas cylinder valve (71) is opened is formed between the piston (4) and the upper end of the gas cylinder (7). A plurality of ventilation notches (84) are sequentially arranged at intervals along the circumference on the limiting sleeve (8). The upper end of the ventilation notch (84) penetrates through the inner side wall and the outer side wall of the main body portion (81) along the radial direction of the limiting sleeve (8). The lower end of the ventilation notch (84) penetrates through the inner edge and the outer edge of the positioning flange (82) along the radial direction of the limiting sleeve (8). The insertion groove (9) communicates with the inner cavity of the barrel (1).

6. The cask according to claim 2, characterized in that, The piston (4) includes a piston body (41) and a abutting member (42). The piston body (41) includes a cylindrical main body (411) and an avoidance portion (412) located inside the main body (411). The lower end of the main body (411) forms the extension portion (411a). The abutting member (42) is located on the lower side of the avoidance portion (412) and is fixedly connected to the piston body (41). An upper avoidance hole (61) with a closed top and an open bottom is formed in the avoidance portion (412). A lower avoidance hole (62) penetrating through both ends along the sliding direction of the piston (4) is formed in the abutting member (42). The upper avoidance hole (61) and the lower avoidance hole (62) are vertically aligned and communicated to jointly form the avoidance space (6).

7. The cask according to claim 6, wherein, The abutting member (42) includes a cylindrical outer cylinder body (421) and an inner sleeve body (422) located inside the outer cylinder body (421) and concentric with the outer cylinder body (421). The inner hole of the inner sleeve body (422) forms the lower avoidance hole (62). The diameter of the lower end portion of the inner sleeve body (422) gradually decreases from top to bottom to form a necked shape. An annular groove (11) with a downward-facing notch and surrounding the outer periphery of the inner sleeve body (422) is formed between the outer cylinder body (421) and the inner sleeve body (422). After the elastic piece (31) leaves the avoidance space (6), the upper end of the elastic piece (31) can enter the annular groove (11).

8. The cask according to claim 6, characterized in that, When the elastic piece (31) is in the avoidance space (6) and the piston (4) moves downward to abut against the limit sleeve (8), there is a gap (H) between the upper end of the elastic piece (31) and the inner top wall of the upper avoidance hole (61).

9. The cask according to claim 8, characterized in that, When the upper end of the elastic piece (31) is in the annular groove (11), the entire extension portion (411a) is located outside the insertion groove (9).

10. The cask according to claim 1, characterized in that, The trigger disc (3) is slidably disposed in the main body portion (81). The upper end of the main body portion (81) has a limit flange (83) that turns inward along the radial direction. The limit flange (83) can be abutted by the trigger disc (3) to limit the upward movement stroke of the trigger disc (3). When the elastic piece (31) is in the avoidance space (6), the piston (4) can move downward to abut against the upper side surface of the limit flange (83).

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