Keg

Abstract

A keg, comprising a keg body (1) and a gas cylinder (2) arranged in the keg body (1), wherein the top of the gas cylinder (2) is provided with a piston cavity (23); a piston (3) is slidably arranged in the piston cavity (23); the piston (3) divides the piston cavity (23) into a pressure cavity (231) and a balance cavity (232); a gas outlet valve (6) is arranged in an opening of the gas cylinder (2); a trigger member (5) is arranged in the balance cavity (232); the piston (3) is provided with a clearance hole (31); the trigger member (5) is provided with at least two elastic members (52) extending upwards into the clearance hole (31); an abutting member (4) is fixed to the piston (3) and below the orifice of the clearance hole (31); the minimum radial distance between the abutting member (4) and the center line of the clearance hole (31) is less than the radius of the clearance hole (31); when the elastic members (52) are located in the clearance hole (31), the abutting member (4) is located below the elastic members (52), and the minimum radial distance between the abutting member (4) and the center line of the clearance hole (31) is less than the maximum radial distance between the top of each elastic member (52) and the center line of the clearance hole (31); and the piston (3) can move upwards until the abutting member (4) is located above the elastic members (52).

Description

A wine barrel Technical Field

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

[0002] With the improvement of living standards, people have higher requirements for drinking. Canned and bottled beer can hardly meet people's drinking needs. More and more people hope to drink fresh, hygienic, delicious and pure beer. A wine barrel is a tool for holding wine. Generally, a wine spear is set at the mouth of the wine barrel. The wine spear cooperates with the dispenser to squeeze out the wine in the wine barrel. In order to draw out the beer in the wine barrel, the traditional wine barrel has an external carbon dioxide gas tank connected to the air inlet. 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 in the wine barrel. Under the action of high pressure, the beer flows out through the wine outlet of the dispenser. This type of wine barrel requires an external carbon dioxide gas tank. Therefore, if there is no matching carbon dioxide gas tank on site, the wine barrel cannot be used normally.

[0003] In response to the above problems, a Chinese patent document (application number: CN202311109762.0) discloses a wine barrel, comprising a barrel body, a gas cylinder provided in the barrel body and a gas cylinder valve provided on the gas cylinder, a bottle mouth portion on the top of the gas cylinder and a piston hole provided in the bottle mouth portion, a piston slidably provided in the piston hole, and a closed pressure chamber is formed between the upper side surface of the piston and the inner wall of the piston hole, a trigger disk located on the lower side of the piston is also provided in the bottle mouth portion, the trigger disk includes a main body portion slidably connected to the bottle mouth portion, and a limiting portion is provided on the bottle mouth portion for limiting the upward movement stroke of the trigger disk. The gas cylinder has been loaded into the wine barrel after production, but it is necessary to avoid the gas cylinder valve on the gas cylinder from opening before filling with wine. Therefore, the piston is provided with an elastic sheet for accommodating the trigger disk and an escape space that allows the piston to move downward relative to the trigger disk. The two elastic sheets of the trigger disk are located in the escape space. At this time, the piston will not press the elastic sheet when moving up and down. When the wine barrel is filled with wine, the linkage between the elastic sheet and the piston needs to be triggered, so gas is filled into the wine barrel. Under the action of the gas, the piston moves upward, causing the elastic sheet to elastically reset 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.

[0004] The above-mentioned elastic sheet needs to rely on its own elastic force to expand and reset radially after leaving the avoidance space. That is to say, when the wine barrel is not filled with wine, the elastic sheet is always in a compressed and deformed state and is tightened in the avoidance space. If the wine barrel is not used for a long time after production, the elastic sheet will be compressed in the avoidance space for a long time, which may easily lead to aging of the elastic sheet and a decrease in elastic force. When the wine barrel needs to be triggered after being filled with wine, even if the elastic sheet leaves the avoidance space, it is difficult for the elastic sheet to expand radially after the elastic force decreases, which makes it difficult for the piston to rest against the elastic sheet, and the reliability of use is low.

[0005] Since the above problem is caused by the extrusion and deformation of the elastic sheet, in order to prevent the elastic sheet from being difficult to unfold and reset after leaving the avoidance space due to the decrease in elastic force, technical personnel in this field can easily think of increasing the radial dimension of the avoidance space based on the above structure, so as to avoid the elastic sheet from being excessively extruded and deformed, or increase the elastic properties of the elastic sheet itself, such as changing the material of the elastic sheet or increasing the size of the elastic sheet.

[0006] Summary of the Invention

[0007] The purpose of the present invention is to solve the above problems in the existing technology and propose a wine barrel to solve the problem that the existing wine barrels are not reliable in use.

[0008] The objectives of the present invention can be achieved through the following technical solutions: A wine barrel, comprising a barrel body and a gas cylinder disposed within the barrel body, wherein the top of the gas cylinder has a piston cavity, a piston slidably disposed within the piston cavity, the piston dividing the piston cavity into an upper and closed pressure chamber and a lower and balancing chamber respectively connected to the barrel body cavity and the gas cylinder mouth, an air outlet valve being disposed within the gas cylinder mouth, and a triggering member capable of pressing down to open the air outlet valve within the balancing chamber, the piston having a downwardly opening relief hole, the triggering member having at least two spring pieces extending upward into the relief hole and capable of relatively approaching and elastically deforming, characterized in that the piston has an abutment member fixed on the hole wall of the relief hole or below the hole of the relief hole, the minimum radial distance between the abutment member and the centerline of the relief hole being less than the radius of the relief hole, the abutment member being located below the spring piece when the spring piece is within the relief hole, and the minimum radial distance between the abutment member and the centerline of the relief hole being less than the maximum radial distance between the top of the spring piece and the centerline of the relief hole, and the piston being capable of moving upward until the abutment member is located above the spring piece.

[0009] For example, a trigger with two springs. When the barrel is empty, both springs are located in the piston's clearance holes. These springs are in a natural, uncompressed state, yet are elastically deformable. Within the limited vertical travel of the piston, the piston will not abut against the springs in the direction of movement. Therefore, the trigger will not depress the outlet valve, and the gas cylinder will not release gas when empty. When the wine barrel is filled with wine, the linkage between the piston and the trigger part needs to be triggered, that is, gas is filled into the wine barrel, and the balance chamber below the piston is connected to the inner chamber of the wine barrel, so the air pressure in the balance chamber becomes larger. When the air pressure in the balance chamber is greater than the air pressure in the pressure chamber, the piston moves upward, causing the spring on the trigger part to be pulled out of the clearance hole relative to the piston, wherein a stop member is fixed on the piston, and the stop member is on the hole wall of the clearance hole or below the hole mouth of the clearance hole, and the minimum radial distance between the stop member and the center line of the clearance hole is smaller than the radius of the clearance hole, especially the minimum radial distance between the stop member and the center line of the clearance hole is smaller than the maximum radial distance between the top of the spring piece and the center line of the clearance hole. Therefore, in the process of the spring piece escaping from the clearance hole and moving to the bottom of the stop member, the stop member will squeeze the spring piece radially, and the two spring pieces will be relatively close to each other and deformed. When the two spring pieces move to the bottom of the stop member, they will be relatively far away from each other and reset under the action of their own elastic force, and the linkage between the trigger part and the piston is triggered. Thereafter, whenever the wine barrel is taken out of it, causing the pressure in the barrel's inner cavity and the balance chamber to decrease, that is, when the pressure in the balance chamber is less than the pressure in the pressure chamber above the piston, the piston moves downward, and the abutment member can abut against the spring, causing the trigger member to press down the outlet valve to release gas from the cylinder. Therefore, even if the wine barrel is not used for a long time, the spring will remain in the clearance hole for a long time. However, since the spring is not compressed and deformed, it is in a natural state. It is only deformed by the abutment member when it is separated from the clearance hole. This does not cause the spring to age and affect its elastic force. Therefore, it can be expanded and reset after being released, and has high reliability.

[0010] In the above-mentioned wine barrel, the abutment member includes a fixing portion in an annular shape fixed to the piston and an abutment portion located at the edge of the lower end port of the fixing portion. The fixing portion is coaxially arranged with the piston, and the upper end of the inner hole of the fixing portion is aligned and connected with the lower end port of the clearance hole. The inner diameter of the fixing portion is equal to or smaller than the diameter of the clearance hole, and the minimum radial distance of the abutment portion from the center line of the clearance hole is smaller than the radius of the clearance hole. The fixing portion is used to connect to the piston, and its inner hole is aligned with the clearance hole. When the piston moves upward, the spring piece is disengaged from the clearance hole and the inner hole of the fixing portion, so that the spring piece is radially squeezed by the lower abutment portion. After the spring piece disengages from the abutment portion, it radially rebounds and resets to face the upper abutment portion.

[0011] In the aforementioned wine barrel, the abutment portion is conical and cylindrical and is coaxially arranged with the fixed portion, with the smaller end of the abutment portion facing downward. The aperture of the lower end of the abutment portion is smaller than the aperture of the clearance hole. There are two spring plates, and when the two spring plates are located in the clearance hole, the maximum radial distance between the tops of the two spring plates is greater than the aperture of the lower end of the abutment portion. The abutment portion is conical and cylindrical. Even if the spring plates rotate circumferentially after exiting the clearance hole and the inner hole of the abutment portion and being located below the abutment portion, they remain opposite the upper abutment portion, and the abutment portion can reliably press down the spring plates. Furthermore, the abutment portion is conical and cylindrical. When the spring plates exit the clearance hole and the inner hole of the abutment portion and are located below the abutment portion, and the piston moves downward, the abutment portion can be inserted between the two spring plates, thereby spreading the two spring plates apart. The two spring plates can slide upward along the outer surface of the abutment portion and ultimately abut against the lower end surface of the fixed portion, making the linkage between the piston and the trigger member more reliable.

[0012] In the aforementioned wine barrel, the outer circumferential surface of the lower end of the abutting portion has a circumferential guide conical surface. The taper of the guide conical surface is greater than the taper of the outer circumferential surface of the abutting portion. The outer diameter of the lower end of the guide conical surface is less than the maximum radial distance between the inner side surfaces of the tops of the two spring pieces. The outer edge of the fixing portion has a downwardly protruding cylindrical pushing portion along the circumference. The pushing portion is arranged around the abutting portion. The taper of the guide conical surface is greater than the taper of the outer circumferential surface of the abutting portion, causing the outer circumferential surface of the lower end of the abutting portion to further reduce in diameter. When the piston moves downward, the abutting portion inserts between the two spring pieces, stretching them apart and gradually inserting between the abutting portion and the pushing portion, thereby achieving linkage between the piston and the trigger member and improving the reliability of the abutment between the two.

[0013] In the above-mentioned wine barrel, the fixing part and the piston are fixedly connected by clamping, threaded or integrated. The fixing part and the piston adopt a separate structure to facilitate processing, and the two adopt an integrated structure to make the structure more stable and reliable.

[0014] In the aforementioned wine barrel, the trigger member includes a trigger plate. The lower ends of the two spring pieces are vertically fixed to the center of the trigger plate. The upper ends of the two spring pieces are both arc-shaped. The outer side surfaces of the upper ends of the two spring pieces are located on the same conical surface with the small end facing downward. The taper of the conical surface on which the outer side surfaces of the upper ends of the two spring pieces are located is approximately the same as the taper of the inner side surface of the abutment portion. The upper ends of the two spring pieces form an outwardly expanding structure. When the spring pieces are located in the clearance hole and the piston moves upward, the upper outer side surfaces of the two spring pieces first contact the inner side surface of the abutment portion, ensuring the stable and precise posture of the trigger member. The abutment portion then radially compresses the two spring pieces, ensuring reliable and stable operation.

[0015] In the aforementioned wine barrel, the maximum outer diameter of the conical surface on which the upper outer sides of the two spring pieces lie is smaller than the diameter of the clearance hole, and the maximum outer diameter of the conical surface on which the upper outer sides of the two spring pieces lie is larger than the minimum diameter of the abutment portion. In other words, when the two spring pieces are within the clearance hole, they are in a natural state and are not squeezed by the walls of the clearance hole, thus preventing aging of the spring pieces. After being released from the clearance hole and the abutment portion, they can expand radially and face the abutment portion above.

[0016] In the aforementioned wine barrel, the trigger plate forms a clamping hole extending through its lower end between the two spring pieces. The trigger plate also has a stopper located above the clamping hole. The outlet valve includes a tubular nozzle extending upward from the cylinder mouth. The upper end of the nozzle passes through the clamping hole and abuts against the lower end surface of the stopper. A spring acts on the nozzle to abut against the stopper, achieving linkage between the trigger and the outlet valve.

[0017] In the above-mentioned wine barrel, a limiting sleeve is further provided in the balancing chamber. The outer circumferential surface of the lower end of the limiting sleeve has a fixed convex edge in the circumferential direction. The fixed convex edge is fixed to the gas cylinder, and there is a gap between the outer circumferential surface of the limiting sleeve and the wall surface of the balancing chamber. The lower edge of the piston has a cylindrical limiting portion in the circumferential direction. When the two spring pieces are located in the clearance hole and the piston moves downward until the lower end surface of the limiting portion abuts against the upper end surface of the fixed convex edge, the piston and the spring piece do not abut axially. The limiting sleeve can limit the lowest position of the piston. Even if the limiting portion of the piston abuts downward against the fixed convex edge and is in the lowest position, the piston still does not abut against the spring piece, thereby ensuring that the spring piece will not be pressed down when it is located in the clearance hole, avoiding gas leakage from the gas cylinder when the wine barrel is not filled with wine, and improving reliability in use.

[0018] In the aforementioned wine barrel, the inner circumferential surface of the upper end of the limiting sleeve has a circumferential limiting ridge, and the outer circumferential edge of the trigger plate has a cylindrical guide portion. The guide portion is located within the limiting sleeve, and the outer circumferential surface of the guide portion slides with the inner circumferential surface of the limiting sleeve. Under the action of the nozzle of the air outlet valve, the upper end surface of the guide sleeve abuts upward against the lower end surface of the limiting ridge. When the spring piece is located in the clearance hole and the piston moves upward, the abutment portion radially compresses the two spring pieces and generates an upward lifting force on the spring pieces. At this time, the limiting ridge can abut against the guide portion, limiting the trigger member, thereby allowing the two spring pieces to smoothly escape from the clearance hole and the abutment portion, thereby improving reliability.

[0019] In the aforementioned wine barrel, an annular groove is circumferentially defined on the lower end surface of the piston, surrounding the clearance hole. A radially protruding annular retaining edge is circumferentially defined on the outer circumference of the fixing portion, which engages within the annular groove. The abutment member and the piston are securely connected by a snap connection, facilitating fabrication.

[0020] Compared with the existing technology, this wine barrel has the following advantages:

[0021] 1. Since the shrapnel is in the clearance hole for a long time when the wine barrel is not used for a long time, the shrapnel is not compressed and deformed, but is in a natural state. It is only deformed by the abutment when it is separated from the clearance hole. This will not cause the shrapnel to age and affect the elastic force. Therefore, it can be expanded and reset after being disengaged, and has high reliability.

[0022] 2. Since the abutment portion is in a conical cylindrical shape, when the spring piece escapes from the clearance hole and the inner hole of the abutment portion and is located below the abutment portion, and when the piston moves downward, the abutment portion can be inserted between the two spring pieces, thereby stretching the two spring pieces apart. The two spring pieces can slide upward along the outer surface of the abutment portion and finally abut against the lower end surface of the fixed portion, making the linkage between the piston and the trigger member more reliable.

[0023] 3. Since the outer circumference of the lower end of the abutting part has a guiding cone surface in the circumferential direction, the outer circumference of the lower end of the abutting part is further reduced in diameter. When the piston moves downward, the abutting part is inserted between the two spring pieces and the two spring pieces are stretched apart, and gradually inserted between the abutting part and the pushing part, so that the piston and the trigger member are linked, thereby improving the reliability of the abutment between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural sectional view of a wine barrel.

[0025] FIG2 is an enlarged view of the structure at point A in FIG1 .

[0026] FIG3 is a partial cross-sectional view of the top of the gas cylinder at another cutting angle.

[0027] FIG4 is a schematic diagram of the three-dimensional structure of the trigger member.

[0028] FIG5 is a first flow chart of the elastic sheet being squeezed and deformed by the abutting member.

[0029] FIG6 is a second flowchart of the process when the spring piece escapes from the clearance hole and the inner hole of the abutting portion.

[0030] FIG7 is a third flowchart of the operation when the abutting member abuts against the triggering member.

[0031] FIG8 is a fourth working flow diagram when the outlet valve is opened.

[0032] In the figure, 1, barrel body; 2, gas cylinder; 21, bottle body; 211, convex ring; 22, bottle cap; 23, piston chamber; 231, pressure chamber; 232, balance chamber; 24, inner cover; 241, annular groove; 242, flange; 25, sealing gasket; 3, piston; 31, clearance hole; 32, limiting part; 33, annular groove; 34, sealing ring; 4, abutment; 41, fixing part; 42, abutment; 421, guide cone; 422, notch; 43 , annular clamping edge; 44, pushing part; 5, trigger member; 51, trigger disk; 52, spring; 53, clamping hole; 54, limiting ring; 55, guide part; 6, outlet valve; 61, air nozzle; 611, vent hole; 62, sealing gasket; 63, spring; 64, valve body; 65, filter tip; 7, limiting sleeve; 71, fixing ridge; 72, limiting ridge; 73, ventilation gap; 8, wine spear; 9, bracket; 91, fixing sleeve; 10, gap; 11, space. DETAILED DESCRIPTION

[0033] 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.

[0034] Example 1:

[0035] As shown in Figure 1, a wine barrel comprises a barrel body 1, with a wine spear 8 mounted at the mouth of the barrel body 1. The wine spear 8 is used to inflate the inner cavity of the barrel body 1 and force the wine out. As shown in Figure 2, a gas cylinder 2 is mounted within the barrel body 1. The gas cylinder 2 comprises a bottle body 21 and a cylindrical bottle cap 22. The upper end of the bottle cap 22 is sealed, and the lower end of the bottle cap 22 is mounted on the top of the bottle body 21 and covers the bottle cap of the bottle body 21, and the two are axially fixed. A bracket 9 is fixed to the inner end of the wine spear 8. The bracket 9 has a cylindrical fixing sleeve 91, which is mounted on the bottle cap 22, and the two are axially fixed. The inner cavity of the bottle cap 22 is a piston cavity 23, in which a piston 3 is slidably disposed. A sealing ring 34 is embedded in the outer circumference of the piston 3 and forms a seal with the wall of the piston cavity 23. The piston 3 divides the piston cavity 23 into a pressure cavity 231 located above and a balance cavity 232 located below. The pressure cavity 231 is in a closed state, and the balance cavity 232 is connected to the inner cavity of the barrel body 1 through the gap 11 between the bottle cap 22 and the bottle body 21. The bottle mouth at the upper end of the bottle body 21 faces the piston 3, and an air outlet valve 6 is provided in the bottle mouth of the bottle body 21. The bottle mouth of the bottle body 21 is covered with an inner cap 24. The inner cavity of the bottle body 21 and the balance cavity 232 are separated by the inner cap 24. The air outlet valve 6 is fixed at the center of the inner cap 24. The inner cavity of the bottle body 21 is connected to the balance cavity 232 through the open air outlet valve 6. The inner cap 24 is recessed in the middle region between its outer and inner edges to form an annular groove 241. The outer edge of the inner cap 24 is bent downward to form a flange 242. The rim of the mouth of the bottle body 21 has an outwardly protruding convex ring 211. The convex ring 211 is embedded and fixed between the flange 242 and the annular groove 241. Generally, the convex ring 211 and the annular groove 241 are tightly fitted and fixed. A sealing gasket 25 is provided between the upper surface of the convex ring 211 and the inner cap 24. The convex ring 211 not only increases the structural strength of the bottle body 21 mouth, ensuring a stable fixation of the inner cap 24 and the bottle body 21, but also ensures a good seal between the inner cap 24 and the bottle body 21.

[0036] As shown in FIG2 , a trigger member 5 is provided within the balancing chamber 232 . The trigger member 5 is located above the outlet valve 6 and, when lowered, can press down and open the outlet valve 6 (as shown in FIG8 ). The piston 3 has a downwardly opening relief hole 31 . The trigger member 5 has two upwardly extending and symmetrically arranged springs 52 . The two springs 52 extend upwardly into the relief hole 31 . The two springs 52 are made of plastic and can elastically deform relative to each other when subjected to radial compressive force. After release, they can radially expand and reset under the action of their own elastic force. A stop member 4 is fixed to the piston 3 below the opening of the give-way hole 31. The minimum radial distance between the stop member 4 and the center line of the give-way hole 31 is less than the radius of the give-way hole 31. When the spring 52 is located in the give-way hole 31, the stop member 4 is located below the spring 52, and the minimum radial distance between the stop member 4 and the center line of the give-way hole 31 is less than the maximum radial distance between the top of the spring 52 and the center line of the give-way hole 31. As shown in Figures 5 and 6, when gas is filled in the barrel body 1 to increase the pressure in the balance chamber 232 and push the piston 3 upward, the piston 3 can move upward to allow the spring 52 to escape from the give-way hole 31 and the stop member 4, and the stop member 4 is located above the spring 52.

[0037] Specifically, as shown in Figures 2 and 3, the abutment member 4 includes an annular fixing portion 41 and an abutment portion 42 located at the edge of the lower end of the fixing portion 41. The fixing portion 41 is fixedly connected to the piston 3 by clamping, that is, an annular clamping groove 33 is circumferentially formed on the lower end surface of the piston 3. The annular clamping groove 33 surrounds the clearance hole 31 and is arranged concentrically with the clearance hole 31. The outer circumferential surface of the fixing portion 41 has a radially protruding annular clamping edge 43 circumferentially, and the annular clamping edge 43 is clamped in the annular clamping groove 33. The fixing portion 41 is coaxially arranged with the piston 3, and the inner hole diameter of the fixing portion 41 is the same as the hole diameter of the clearance hole 31. The upper end of the inner hole of the fixing portion 41 is aligned and connected to the lower end of the clearance hole 31. The inner diameter of the fixing portion 41 is equal to the hole diameter of the clearance hole 31. The abutting portion 42 is in the shape of a cone, with the end with the larger diameter of the abutting portion 42 facing upward and integrally formed with the fixing portion 41, and the end with the smaller diameter of the abutting portion 42 facing downward. The abutting portion 42 and the fixing portion 41 are coaxially arranged, and the aperture of the lower end of the abutting portion 42 is smaller than the aperture of the clearance hole 31, that is, the minimum radial distance between the abutting portion 42 and the center line of the clearance hole 31 is smaller than the radius of the clearance hole 31. As shown in FIG4 , the triggering member 5 includes a triggering disk 51, and the lower ends of two spring pieces 52 are vertically fixed to the center position of the triggering disk 51. The upper ends of the two spring pieces 52 are both in the shape of arcuate sheets. The outer side surfaces of the upper ends of the two spring pieces 52 are located on the same conical surface with the smaller end facing downward, and the taper of the conical surface on which the outer side surfaces of the upper ends of the two spring pieces 52 are located is substantially the same as the taper of the inner side surface of the abutting portion 42. The maximum outer diameter of the conical surface on which the upper outer sides of the two spring pieces 52 lie is smaller than the diameter of the clearance hole 31, so that the two spring pieces 52 are naturally free of compression when located within the clearance hole 31. The maximum outer diameter of the conical surface on which the upper outer sides of the two spring pieces 52 lie is larger than the minimum diameter of the abutment portion 42, so that when the spring pieces 52 are downwardly released from the clearance hole 31, they are radially compressed by the abutment portion 42. The lower outer circumferential surface of the abutment portion 42 has a circumferential guide conical surface 421. The taper of this guide conical surface 421 is greater than the taper of the outer circumferential surface of the abutment portion 42, and the outer diameter of the lower end of the guide conical surface 421 is smaller than the maximum radial distance between the inner side surfaces of the tops of the two spring pieces 52. The outer edge of the lower end surface of the fixing portion 41 has a cylindrical pushing portion 44 along its circumferential direction. There is a gap between the pushing portion 44 and the abutting portion 42. When the spring piece 52 escapes from the clearance hole 31 and the inner hole of the abutting portion 42 and the piston 3 moves downward, the spring piece 52 can be inserted between the abutting portion 42 and the pushing portion 44. The lower edge of the abutting portion 42 has a plurality of notches 422 along its circumferential direction. The lower end cross-section of the spring piece 52 is rectangular with corners. Therefore, when the spring piece 52 is located in the clearance hole 31, it needs to pass upward through the inner hole of the abutting portion 42. The notches 422 provide clearance for the corners of the lower end of the spring piece 52.

[0038] As shown in Figures 2 and 3, a limiting sleeve 7 is further provided within the balancing chamber 232. The lower outer circumferential surface of the limiting sleeve 7 has a circumferentially fixed ridge 71. The inner circumferential surface of the bottle cap 22 has a circumferentially downwardly facing step surface. The fixed ridge 71 of the limiting sleeve 7 is clamped and fixed between the step surface and the bottle body 21. In order to maintain communication between the gap 11 between the bottle cap 22 and the bottle body 21 and the balancing chamber 232, thereby ensuring communication between the balancing chamber 232 and the inner cavity of the barrel body 1, a venting notch 73 is provided on the fixed ridge 71. The venting notch 73 penetrates the sleeve wall of the limiting sleeve 7. The limiting sleeve 7 is coaxially arranged with the bottle cap 22 and the piston 3, and a gap 10 is defined between the outer circumference of the limiting sleeve 7 and the wall surface of the balancing chamber 232. The lower edge of the piston 3 is provided with a cylindrical limiting portion 32 in the circumferential direction. The limiting portion 32 can be inserted downwardly into the gap 10 between the outer circumferential surface of the limiting sleeve 7 and the wall surface of the balancing chamber 232. When the two springs 52 are located in the clearance holes 31 and the piston 3 moves downward until the lower end surface of the limiting portion 32 abuts against the upper end surface of the fixed protrusion 71, the piston 3 and the springs 52 do not abut axially. The inner circumferential surface of the upper end of the limiting sleeve 7 is provided with a limiting protrusion 72 in the circumferential direction. The outer edge of the trigger disk 51 is provided with a cylindrical guide portion 55 in the circumferential direction. The guide portion 55 is located in the limiting sleeve 7, and the outer circumferential surface of the guide portion 55 is slidably engaged with the inner circumferential surface of the limiting sleeve 7. The limiting protrusion 72 is located above the guide portion 55. The air outlet valve 6 includes a valve body 64 with a valve hole fixedly installed at the center of the inner cover 24. The lower end of the valve body 64 is connected to a breathable filter tip 65. The upper end of the valve body 64 is inserted into and fixed on the annular groove body 241 of the inner cover 24, and a sealing gasket 62 is fixed between the upper end of the valve body 64 and the inner edge of the inner cover 24. A tubular air nozzle 61 is vertically slidably inserted into the inner edge of the valve body 64, and the upper end of the air nozzle 61 extends upward from the valve body 64. The inner hole of the gas nozzle 61 has a partition wall, dividing it into an upper blind hole and a lower blind hole. A vent hole 611 is formed on the outer surface of the gas nozzle 61, communicating with the bottom of the upper blind hole. A stopper is provided on the outer surface of the gas nozzle 61, below the vent hole 611. A spring 63 is also provided within the valve body 64, acting upward on the gas nozzle 61. Under the action of the spring 63, the stopper of the gas nozzle 61 presses upward against the sealing gasket 62, forming a seal. Simultaneously, the inner surface of the sealing gasket 62 blocks the vent hole 611. The inner diameter of the inner cover 24 is smaller than the outer diameter of the stopper. The inner edge of the inner cover 24 forms an axial limit for the gas nozzle 61, preventing it from falling out of the valve body 64. The trigger disk 51 forms a clamping hole 53 with a lower end passing through it between the two spring pieces 52. The trigger disk 51 also has a limiting ring 54 located above the clamping hole 53. The upper end of the air nozzle 61 passes through the clamping hole 53 and, under the action of the spring 63, presses upward against the lower end surface of the limiting ring 54. The upper end surface of the guide portion 55 presses upward against the lower end surface of the limiting protrusion 72.

[0039] As shown in Figures 2 and 3, when the barrel 1 is not filled with wine and in use, the limiting portion 32 of the piston 3 is pressed downward against the fixed ridge 71 of the limiting sleeve 7 under the pressure in the pressure chamber 231, and the two spring pieces 52 are located in the clearance hole 31 and in a natural state. When the barrel 1 is filled with gas, the air pressure in the barrel 1 increases, that is, the air pressure in the balance chamber 232 is greater than the air pressure in the pressure chamber 231. As shown in Figure 5, the piston 3 moves upward, and the guide portion 55 of the trigger member 5 is acted upon by the limiting ridge 72 of the limiting sleeve 7 and becomes stationary. The conical cylindrical abutment portion 42 radially compresses the two spring pieces 52, causing them to move closer together and deform. Furthermore, as shown in Figure 6, the two spring pieces 52 are completely released from the clearance hole 31 and the inner hole of the abutment portion 42, and then relatively move away and expand and reset, completing the triggering. When the air pressure in the barrel body 1 drops after the wine is taken out, that is, when the air pressure in the balance chamber 232 is less than the air pressure in the pressure chamber 231, as shown in Figure 7, the piston 3 moves downward under the action of the air pressure in the pressure chamber 231, and the abutment portion 42 presses downward on the two spring pieces 52. At the same time, under the action of the guiding cone 421 of the abutment portion 42, the two spring pieces 52 are radially stretched and inserted between the abutment portion 42 and the pushing portion 44. Then, as shown in Figure 8, the piston 3 pushes the trigger member 5 downward, thereby pressing the gas nozzle 61 downward. The gas nozzle 61 moves downward, and the vent 611 opens, allowing the gas cylinder 2 to discharge gas and replenish the air pressure in the barrel body 1 until the pressure chamber 231 and the balance chamber 232 achieve pressure balance. The dotted line in Figure 8 is one of the routes for gas to flow out of the gas cylinder 2. When the pressure in the balance chamber 232 is balanced with the pressure chamber 231 , the air nozzle 61 rises under the action of the spring 63 , as shown in FIG7 , and the shoulder abuts against the sealing gasket 62 again to close the air outlet valve 6 .

[0040] Example 2:

[0041] The structure of the wine barrel is basically the same as that of the first embodiment, except that the abutment member 4 is fixed on the hole wall of the clearance hole 31 , and the abutment member 4 is an annular convex edge radially protruding from the hole wall of the clearance hole 31 .

[0042] Example 3:

[0043] The structure of the outlet valve 6 differs from that of the first embodiment, but the other structures are essentially the same as those of the first embodiment. The difference lies in that the valve nozzle 61 is rod-shaped, and a sealing gasket 62 is fixed to the outer surface of the valve nozzle 61. Under the action of the spring 63, the sealing gasket 62 presses upward against the inner edge of the inner cover 24 to form a seal. When the valve nozzle 61 moves downward, the sealing gasket 62 is separated from the inner edge of the inner cover 24, and the outlet valve 6 opens. The gas in the gas cylinder 2 can enter the balancing chamber 232 through the valve hole of the valve body 64, and then enter the inner cavity of the barrel body 1 through the vent notch 73 of the limiting sleeve 7 and the gap 11 between the bottle body 21 and the bottle cap 22.

[0044] 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.

[0045] Although the terms barrel 1, gas cylinder 2, and bottle 21 are frequently used herein, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A wine barrel, comprising a barrel body (1) and a gas cylinder (2) arranged inside the barrel body (1). The top of the gas cylinder (2) has a piston chamber (23), and a piston (3) is slidably arranged in the piston chamber (23). The piston (3) divides the piston chamber (23) into a pressure chamber (231) which is located above and closed, and a balance chamber (232) which is located below and is respectively communicated with the inner cavity of the barrel body (1) and the bottle mouth of the gas cylinder (2). An air outlet valve (6) is arranged in the bottle mouth of the gas cylinder (2), and a trigger member (5) capable of pressing down and opening the air outlet valve (6) is arranged in the balance chamber (232). The piston (3) has a relief hole (31) with an opening facing downwards, and the trigger member (5) has at least two elastic pieces (52) that extend upwards into the relief hole (31) and can elastically deform by approaching each other. It is characterized in that, The piston (3) is fixed with a support member (4) on the hole wall of the clearance hole (31) or below the hole opening of the clearance hole (31); the minimum radial distance between the support member (4) and the center line of the clearance hole (31) is less than the radius of the clearance hole (31); when the spring sheet (52) is located in the clearance hole (31), the support member (4) is located below the spring sheet (52); and the minimum radial distance between the support member (4) and the center line of the clearance hole (31) is less than the maximum radial distance between the top of the spring sheet (52) and the center line of the clearance hole (31); the piston (3) can move upward until the support member (4) is located above the spring sheet (52).

2. The wine barrel according to claim 1, characterized in that, The abutment member (4) comprises a fixing portion (41) in an annular shape and fixed on the piston (3), and an abutment portion (42) located at the edge of the lower end port of the fixing portion (41); the fixing portion (41) is coaxially arranged with the piston (3); the upper end port of the inner hole of the fixing portion (41) is aligned and communicated with the lower end hole of the clearance hole (31); the inner diameter of the fixing portion (41) is equal to or smaller than the hole diameter of the clearance hole (31); and the minimum radial distance between the abutment portion (42) and the center line of the clearance hole (31) is smaller than the radius of the clearance hole (31).

3. The cask according to claim 2, characterized in that, The abutting portion (42) is in a conical cylindrical shape and is coaxially arranged with the fixing portion (41), and the end of the abutting portion (42) with a smaller diameter faces downward, the aperture of the lower end of the abutting portion (42) is smaller than the aperture of the clearance hole (31), there are two spring sheets (52), and when the two spring sheets (52) are located in the clearance hole (31), the maximum radial distance between the tops of the two spring sheets (52) is greater than the aperture of the lower end of the abutting portion (42).

4. The cask according to claim 3, characterized in that, The outer circumferential surface of the lower end of the abutting portion (42) is provided with a guiding conical surface (421) in the circumferential direction, the taper of the guiding conical surface (421) is greater than the taper of the outer circumferential surface of the abutting portion (42), the outer diameter of the lower end of the guiding conical surface (421) is less than the maximum radial distance between the inner side surfaces of the tops of the two spring sheets (52), and the outer edge of the fixing portion (41) is provided with a cylindrical pushing portion (44) protruding downward in the circumferential direction, and the pushing portion (44) is arranged around the abutting portion (42).

5. The cask according to claim 2 or 3 or 4, characterized in that, The fixing portion (41) is fixedly connected to the piston (3) by clamping, threaded connection or an integrated structure.

6. The cask according to claim 3 or 4, characterized in that The trigger member (5) comprises a trigger disk (51), the lower ends of the two spring pieces (52) are vertically fixed at the center of the trigger disk (51), the upper ends of the two spring pieces (52) are both in the shape of arc sheets, the outer side surfaces of the upper ends of the two spring pieces (52) are located on the same conical surface with the small end facing downward, and the taper of the conical surface where the outer side surfaces of the upper ends of the two spring pieces (52) are located is substantially the same as the taper of the inner side surface of the abutting portion (42).

7. The cask according to claim 6, characterized in that, The maximum outer diameter of the conical surface where the upper outer side surfaces of the two spring pieces (52) are located is smaller than the aperture of the clearance hole (31), and the maximum outer diameter of the conical surface where the upper outer side surfaces of the two spring pieces (52) are located is larger than the minimum aperture of the abutment portion (42).

8. The cask according to claim 6, characterized in that, The trigger disk (51) is formed with a clamping hole (53) penetrating the lower end between the two spring sheets (52), and the trigger disk (51) is also provided with a limiting ring (54) located above the clamping hole (53). The gas outlet valve (6) comprises a tubular gas nozzle (61) extending upward from the mouth of the gas cylinder (2), and the upper end of the gas nozzle (61) passes through the clamping hole (53) and abuts against the lower end surface of the limiting ring (54).

9. The cask according to any one of claims 1 to 4, characterized in that, A limiting sleeve (7) is also provided in the balancing chamber (232). The outer circumferential surface of the lower end of the limiting sleeve (7) is provided with a fixed convex edge (71) in the circumferential direction. The fixed convex edge (71) is fixed to the gas cylinder (2), and a gap (10) is provided between the outer circumferential surface of the limiting sleeve (7) and the wall surface of the balancing chamber (232). The lower end edge of the piston (3) is provided with a cylindrical limiting portion (32) in the circumferential direction. When the two spring pieces (52) are located in the clearance hole (31) and the piston (3) moves downward until the lower end surface of the limiting portion (32) abuts against the upper end surface of the fixed convex edge (71), the piston (3) and the spring piece (52) do not abut against each other in the axial direction.

10. The cask according to claim 9, characterized in that, The inner circumferential surface of the upper end of the limiting sleeve (7) is provided with a limiting convex edge (72) in the circumferential direction, and the outer edge of the trigger plate (51) is provided with a cylindrical guide portion (55) in the circumferential direction. The guide portion (55) is located in the limiting sleeve (7), and the outer circumferential surface of the guide portion (55) is slidably matched with the inner circumferential surface of the limiting sleeve (7). Under the action of the air nozzle (61) of the air outlet valve (6), the upper end surface of the guide portion (55) is upwardly pressed against the lower end surface of the limiting convex edge (72).

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