Fresh-keeping anti-explosion beer barrel

Abstract

The utility model relates to the technical field of liquid packaging containers, in particular to a fresh-keeping anti-explosion beer barrel. Comprising a barrel body formed by PET in a blow molding mode, a barrel cover is installed at the upper end of the barrel body and comprises a cover body fixedly connected to an opening of the barrel body and a wine spear arranged in the center of the cover body, the wine spear comprises a valve cover installed in the center of the cover body and a core pipe inserted in the center of the valve cover in a sliding mode, and a large spring seat is installed at the lower end of the core pipe. A large spring is arranged between the large spring seat and the valve cover; a valve hole is formed in the center of the valve deck, a valve plate is installed in the valve hole in a matched mode, the upper end of the core pipe is fixedly connected to the valve plate, and a pressure release valve is installed in the center of the valve plate. According to the beer barrel, the pressure release valve can be additionally arranged on the PET beer barrel without changing a production mold of an existing barrel body, pressure is limited within the upper limit of pressure resistance of the barrel body, the hidden danger of barrel explosion is eradicated, and the PET beer barrel is simple in structure, convenient to use and low in production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid packaging containers, and more specifically, to a fresh-keeping and explosion-proof beer barrel. Background Art

[0002] Carbonated beverages, especially beer, are usually stored in pressure vessels such as stainless steel tanks, but stainless steel is expensive. In order to reduce costs, more and more manufacturers use disposable PET beer barrels. However, during storage and transportation, a large amount of carbon dioxide is released due to changes in temperature or storage and transportation conditions, which causes the pressure in the beer barrel to increase. Once the pressure in the beer barrel exceeds the upper pressure limit of the PET barrel, it may cause the PET barrel to rupture and explode, causing danger. Chinese patent application No. 2024103187422 discloses "A beer barrel and its preservation system to prevent barrel explosion", with publication number CN118004586A. A fixing component is sleeved on the surface of the beer barrel main body, and a linking component is arranged on the surface of the fixing component; the fixing component includes a mounting ring, which is sleeved on the surface of the beer barrel main body, and the mounting ring and the beer barrel main body are connected by threads. The linking component includes linking claws, and four linking claws are arranged. The four linking claws are evenly distributed on the four sides of the mounting ring. A single combined center of gravity is formed between the beer barrel main body and the carriage. When the carriage shakes, the beer barrel main body is driven to shake at the same time. When the carriage is stable, the beer barrel main body is also stable, so that the beer barrel main body inside the carriage is not displaced alone when the carriage shakes, and is shaken or displaced significantly due to inertia, resulting in a large amount of carbon dioxide in the internal beer being precipitated, so that when the user opens the beer barrel main body, the internal high-pressure gas drives the beer to spray out at high speed, causing the hidden danger of barrel explosion. The beer barrel fixing assembly can only relatively reduce the precipitation of carbon dioxide during transportation, and cannot completely prevent the pressure in the beer barrel from rising above the upper limit of the pressure resistance of the PET barrel. In addition, the fixing assembly has a complex structure, is cumbersome to use, and has high manufacturing and use costs. Summary of the invention

[0003] The utility model aims to provide a fresh-keeping explosion-proof beer barrel which has a simple structure, is easy to use and has a low production cost.

[0004] The technical solution adopted by the utility model to solve the technical problem is:

[0005] The utility model discloses a fresh-keeping explosion-proof beer barrel, comprising a barrel body formed by PET blow molding, a barrel cover being installed at the upper end of the barrel body, the barrel cover comprising a cover body fixedly connected to the barrel body opening, a beer spear arranged at the center of the cover body, the beer spear comprising a valve cover installed at the center of the cover body, a core tube slidably inserted at the center of the valve cover, a large spring seat being installed at the lower end of the core tube, a large spring being arranged between the large spring seat and the valve cover; a valve hole being arranged at the center of the valve cover, a valve plate being cooperatively installed in the valve hole, the upper end of the core tube being fixedly connected to the valve plate, a pressure relief valve being installed at the center of the valve plate.

[0006] Through this solution, a pressure relief valve can be added to the PET beer barrel without changing the existing barrel production mold, limiting the pressure within the upper pressure limit of the barrel body and eliminating the hidden danger of barrel explosion. It has a simple structure, is easy to use and has low production cost.

[0007] Preferably, the pressure relief valve includes a pressure relief hole arranged in the center of the valve plate, a pressure relief push rod inserted in the pressure relief hole, and a small spring seat slidably installed in the inner cavity of the core tube. The small spring seat is clamped at the lower end of the pressure relief push rod, and a small spring is arranged between the small spring seat and the valve plate.

[0008] Through this solution, the pressure relief valve has flexible action, high reliability and low production cost.

[0009] Preferably, the pressure relief hole is a frustum-shaped structure that is larger at the top and smaller at the bottom, and a push rod plug adapted to the pressure relief hole is fixedly provided at the upper end of the pressure relief push rod.

[0010] Through this solution, the ejector plug and the pressure relief hole are closely matched and can automatically maintain concentricity after closing, so the sealing effect is good.

[0011] Preferably, a sealing ring is provided on the circumferential surface of the ejector plug.

[0012] Through this solution, the sealing effect of the ejector plug can be improved.

[0013] Preferably, the lower end of the core tube is connected to an extension tube extending to the bottom of the barrel body.

[0014] Through this solution, the assembly of the wine spear can be facilitated and the production cost can be reduced.

[0015] Due to the adoption of the above structure, the beer keg does not need to change the existing barrel production mold, and a pressure relief valve can be added to the PET beer keg to limit the pressure within the upper limit of the barrel pressure, eliminating the hidden danger of barrel explosion. It has a simple structure, is easy to use, and has a low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a partial cross-sectional structural schematic diagram of an embodiment of the present utility model.

[0017] Figure 2 It is a three-dimensional structural diagram of the pressure relief valve.

[0018] Figure 3 It is a schematic diagram of the assembly structure of the wine spear and the pressure relief valve.

[0019] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the utility model. DETAILED DESCRIPTION

[0020] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0021] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0022] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0023] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0024] like Figure 4 As shown, the fresh-keeping explosion-proof beer barrel described in the utility model includes a barrel body 1 formed by PET blow molding, a barrel cover is installed on the upper end of the barrel body 1, and an extension tube 8 is arranged in the inner cavity of the barrel body 1, and the extension tube 8 extends from the barrel cover to the bottom of the barrel body 1.

[0025] like Figure 1 , Figure 3As shown, the barrel cover includes a cover body 2 fixedly connected to the opening of the barrel body 1, and a wine spear arranged in the center of the cover body 2. The wine spear includes a valve cover 3 installed in the center of the cover body 2, and a core tube 4 slidably inserted in the center of the valve cover 3. The core tube 4 is a tubular structure with an open lower end and an upper end fixedly connected to a valve plate 41. The lower end opening of the core tube 4 is connected to an extension tube 8 extending to the bottom of the barrel body 1. A through hole connecting the inside and outside of the tube wall is provided on the tube wall at the junction of the upper end of the core tube 4 and the valve plate 41, and an annular groove is provided on the tube wall at the lower end of the core tube 4. A large spring seat 5 is installed at the lower end of the core tube 4. The large spring seat 5 is a disc-shaped structure with a mounting hole in the center. The core tube 4 is inserted into the mounting hole in the center of the large spring seat 5, and the large spring seat 5 is clamped in the groove at the lower end of the core tube 4. A large spring 6 is provided between the large spring seat 5 and the valve cover 3. The large spring 6 is a spiral spring, which pushes the valve cover 3 upward and presses it on the valve cover hole in the center of the cover body 2. The valve cover hole is a frustum-shaped structure with a small outer opening and a large inner opening. The upper end surface of the valve cover 3 is adapted to the shape of the valve cover hole. The large spring 6 lifts the valve cover 3 from below and blocks it in the valve cover hole. When dispensing wine, the valve cover 3 is pressed down by the dispenser, and the liquid in the barrel body 1 can flow out through the gap between the valve cover 3 and the valve cover hole.

[0026] The valve cover 3 is provided with a valve hole at its center, a valve plate 41 is installed in the valve hole, the upper end of the core tube 4 is fixedly connected to the valve plate 41, and a pressure relief valve is installed at the center of the valve plate 41. The pressure relief valve is installed on the valve cover 3, has a compact structure and a small volume, and the existing beer barrel production equipment only needs to make corresponding changes to the valve cover 3, which is conducive to reducing production costs.

[0027] like Figure 1 , Figure 2 As shown, the pressure relief valve includes a pressure relief hole 7 arranged at the center of the valve plate 41, a pressure relief push rod 71 inserted in the pressure relief hole 7, and a small spring seat 72 slidably installed in the inner cavity of the core tube 4. The small spring seat 72 is clamped at the lower end of the pressure relief push rod 71, and a small spring 73 is arranged between the small spring seat 72 and the valve plate 41. The pressure relief hole 7 is a frustum-shaped structure with a large top and a small bottom. The upper end of the pressure relief push rod 71 is fixedly provided with a push rod plug 74 adapted to the pressure relief hole 7. The pressure relief hole 7 and the push rod plug 74 can adopt a circular frustum-shaped structure or a rectangular frustum-shaped structure. The push rod plug 74 and the pressure relief push rod 71 are an integrated structure formed by injection molding. In this embodiment, the push rod plug 74 is a rectangular frustum-shaped structure. In combination with the pressure relief hole 7 which is also a rectangular frustum-shaped structure, the pressure relief push rod 71 can be prevented from rotating and affecting the sealing effect.

[0028] In addition, in order to further improve the sealing effect, a sealing ring is provided on the circumferential surface of the ejector plug 74 , and the sealing ring may be an O-ring with a circular cross-section, or an elastic rubber layer attached to the side wall of the ejector plug 74 .

[0029] The above-mentioned small spring 73 is a coil spring. When in use, the upper end of the small spring 73 abuts against the valve cover 3 and the lower end is connected to the pressure relief push rod 71. The push rod plug 74 is pressed into the pressure relief hole 7 through the pressure relief push rod 71, thereby closing the pressure relief hole 7. As long as the pressure in the barrel body 1 is not sufficient to push the push rod plug 74, the pressure relief hole 7 will not open; on the contrary, once the pressure in the barrel body 1 exceeds the set value, the pressure applied to the push rod plug 74 exceeds the tension applied to the push rod plug 74 by the small spring 73, the push rod plug 74 will be pushed up by the pressure in the barrel body 1, the pressure relief hole 7 will be opened, and the pressure will be released until the pressure in the barrel body 1 is lower than the set value, and the push rod plug 74 is pressed into the pressure relief hole 7 again under the tension of the small spring 73, thereby closing the pressure relief hole 7.

[0030] Although some specific embodiments of the present invention have been described in detail above through specific embodiments, those skilled in the art should understand that the above examples are only for illustration and are not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A fresh-keeping and explosion-proof beer barrel, comprising a barrel body (1) formed by blow molding of PET, a barrel cover being installed at the upper end of the barrel body (1), characterized in that: The barrel cover comprises a cover body (2) fixedly connected to the opening of the barrel body (1), a wine spear arranged at the center of the cover body (2), the wine spear comprises a valve cover (3) installed at the center of the cover body (2), a core tube (4) slidably inserted in the center of the valve cover (3), a large spring seat (5) is installed at the lower end of the core tube (4), and a large spring (6) is arranged between the large spring seat (5) and the valve cover (3); a valve hole is arranged at the center of the valve cover (3), a valve plate (41) is installed in the valve hole, the upper end of the core tube (4) is fixedly connected to the valve plate (41), and a pressure relief valve is installed at the center of the valve plate (41).

2. A fresh-keeping explosion-proof beer barrel according to claim 1, characterized in that: The pressure relief valve comprises a pressure relief hole (7) arranged at the center of the valve plate (41), a pressure relief push rod (71) inserted in the pressure relief hole (7), and a small spring seat (72) slidably installed in the inner cavity of the core tube (4); the small spring seat (72) is clamped at the lower end of the pressure relief push rod (71), and a small spring (73) is arranged between the small spring seat (72) and the valve plate (41).

3. A fresh-keeping explosion-proof beer barrel according to claim 2, characterized in that: The pressure relief hole (7) is a frustum-shaped structure that is larger at the top and smaller at the bottom, and a push rod plug (74) adapted to fit the pressure relief hole (7) is fixedly provided at the upper end of the pressure relief push rod (71).

4. A fresh-keeping explosion-proof beer barrel according to claim 3, characterized in that: A sealing ring is arranged on the peripheral surface of the ejector plug (74).

5. A fresh-keeping and explosion-proof beer barrel according to any one of claims 1 to 4, characterized in that: The lower end of the core tube (4) is connected to an extension tube (8) extending to the bottom of the barrel body (1).

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