A beer keg fixing structure for a draft beer machine

Abstract

This invention provides a keg fixing structure for a draft beer machine, belonging to the technical field of draft beer machine technology. It solves the problems of inconvenient cleaning and potential impact on the hygiene of existing keg fixing structures. The keg fixing structure includes a keg holder for inserting and fixing the keg, and a mounting base fixed inside the draft beer machine housing. The mounting base has a cylindrical mounting cavity with an open upper end. The keg holder is inserted into the mounting cavity, and the mounting base supports the keg holder. The side wall of the mounting cavity abuts against the keg holder and radially limits its movement. Fasteners are detachably connected to the keg holder to secure it to the mounting base. This keg fixing structure not only ensures the stability of the keg but also features convenient disassembly, assembly, and cleaning, facilitating the long-term maintenance of good hygiene in the draft beer machine.

Description

Technical Field

[0001] This invention belongs to the field of draft beer machine technology and relates to a beer keg fixing structure for a draft beer machine. Background Technology

[0002] With the progress of the times and the improvement of people's quality of life, people have higher requirements for drinking alcohol. Canned and bottled beer can no longer meet people's drinking needs. More and more people hope to drink fresh, hygienic, and delicious draft beer. A draft beer dispenser is a device used to dispense beverages. Traditional draft beer dispensers are used in conjunction with carbon dioxide tanks and kegs. The keg contains beer, and the carbon dioxide tank applies pressure to force the beer out of the keg, which then flows out of the dispenser to the tap, where people can open the tap to drink the beer.

[0003] For example, a beverage dispensing device disclosed in patent literature (application number: 202120656379.7) includes a beverage container and a dispenser for mounting the beverage container. The beverage container has an inner bag for holding the beverage. The dispenser has a housing and a cooling component and an inflation component disposed within the housing. The housing also has a receiving part and a dispensing pipe, one end of which is located on the receiving part. This beverage dispensing device has a barrel fixing frame inside the housing, and an aluminum barrel holder is mounted on the barrel fixing frame. The barrel is inserted and fixed to the aluminum barrel holder. Since the barrel is heavy when filled with beer, and it may wobble during movement or use of the device, it is necessary to ensure good installation stability of the aluminum barrel holder. Therefore, the bottom of the aluminum barrel holder is fixedly connected to the barrel fixing frame with multiple screws, and the top is fixedly connected to the cooling aluminum block with multiple screws. This ensures good installation stability of the aluminum barrel holder and prevents wobbling, thus stably supporting the barrel. However, after a period of use, the aluminum barrel holder needs to be cleaned to remove residual waste liquid, bacteria, and other impurities, thus avoiding affecting the taste and hygiene of the beer. However, the device is cumbersome to disassemble because it is connected to the barrel holder and the cooling aluminum block by multiple screws, making cleaning difficult and ultimately leading to poor hygiene during the use of the draft beer machine. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a beer keg fixing structure for a draft beer machine. The technical problem solved by this invention is to resolve the issues of inconvenient cleaning and potential impact on the hygiene of the draft beer machine while ensuring stable beer keg fixing.

[0005] The objective of this invention can be achieved through the following technical solution: a keg fixing structure for a draft beer machine, the draft beer machine including a housing, the keg fixing structure including a keg seat for inserting and fixing kegs and a mounting seat fixed in the housing, characterized in that the mounting seat has a cylindrical mounting cavity with an open upper end, the keg seat is inserted into the mounting cavity and the mounting seat can support the keg seat, the side wall of the mounting cavity abuts against the keg seat and radially limits the keg seat, and fasteners are detachably connected to the keg seat to fix it to the mounting seat.

[0006] In use, the barrel is inverted, with the opening facing downwards, and inserted into the barrel holder. The holder has a mounting cavity with an open top, allowing the barrel holder to be inserted through this opening. The mounting base supports the barrel holder, limiting its downward movement. Simultaneously, the cylindrical shape of the mounting cavity provides radial restraint to the barrel holder, preventing lateral tilting. In other words, the mounting cavity, through its interaction with the barrel holder, restricts the barrel holder's movement in multiple directions, essentially fixing the barrel holder in place. Only a few fasteners, or even just one, are needed to securely hold the barrel in place, ensuring stability. When cleaning the barrel holder, simply remove a few fasteners or just one fastener to pull the holder out of the mounting cavity for quick disassembly and cleaning. Conversely, the holder can be quickly reinstalled after cleaning. Therefore, this barrel fixing structure not only ensures the stability of the barrel, but also features easy disassembly and cleaning, which helps the draft beer machine maintain good hygiene over a long period of time.

[0007] In the aforementioned beer keg fixing structure of the draft beer machine, the outer wall of the keg holder has a radially protruding anti-detachment protrusion. The mounting base includes a snap-fit ​​component and a cylindrical housing. The housing forms the mounting cavity. The snap-fit ​​component is disposed within the mounting cavity and fixedly connected to the housing. The snap-fit ​​component can press down on the anti-detachment protrusion, and it also has a disassembly notch sized to allow the anti-detachment protrusion to pass through. The keg holder can be rotated to a position where the anti-detachment protrusion and the disassembly notch are vertically aligned when the fasteners are removed. By providing a snap-fit ​​component within the mounting cavity, the snap-fit ​​component can press down on the anti-detachment protrusion on the outer wall of the keg holder, restricting the upward movement of the keg holder and further improving the stability of the keg holder installation. When cleaning the keg holder is required, simply remove the fasteners, rotate the keg holder by a certain angle so that the anti-detachment protrusion and the disassembly notch are vertically aligned, and the keg holder can be pulled out of the mounting cavity, achieving disassembly and cleaning of the keg holder. This structure allows the connection between the barrel base and the mounting base to be achieved primarily through the cooperation of the anti-detachment protrusion and the snap-fit ​​component. Therefore, even with a single fastener, the stability requirements of the connection between the barrel base and the mounting base can be met. Furthermore, a single fastener makes it easier to disassemble and clean the barrel base compared to multiple fasteners.

[0008] In the aforementioned draft beer machine's keg fixing structure, the mounting cavity has a circular cross-section, and the upper end of the keg holder has an annular guide flange that abuts against the side wall of the mounting cavity. When installing the keg holder, the operator simply aligns the keg holder with the opening of the mounting cavity, inserts it, rotates it a certain angle to align the locking element with the anti-detachment protrusion, and then connects the fasteners to complete the installation. Because the guide flange abuts against the mounting cavity, the cavity guides the insertion and rotation of the keg holder during installation, allowing the operator to quickly and smoothly complete the installation process. It also allows for quick removal of the keg holder for cleaning, making the cleaning of this keg fixing structure more convenient.

[0009] In the aforementioned beer keg fixing structure of the draft beer machine, the snap-fit ​​component is annular, and its inner edge has several circumferentially arranged limiting protrusions. The disassembly / removal notches are formed between adjacent limiting protrusions. The number of anti-detachment protrusions and limiting protrusions is equal, and each limiting protrusion is correspondingly positioned on the upper side of each anti-detachment protrusion and can press down on the corresponding anti-detachment protrusion. Through the cooperation of multiple anti-detachment protrusions and multiple limiting protrusions, and with the limiting protrusions arranged sequentially circumferentially, the pressure between the snap-fit ​​component and the keg holder is balanced. The snap-fit ​​component can more stably press down on the keg holder, improving the stability of the keg holder installation and thus enhancing the stability of the keg fixation.

[0010] In the aforementioned draft beer machine keg fixing structure, the fastener is a screw. The keg holder includes a cylindrical main body with a protruding extension connected to its outer peripheral wall. The extension is located above the snap-fit ​​component, and its upper end face has a mounting groove. A bolt through-hole is formed in the bottom of the mounting groove, penetrating the bottom surface of the extension. One fastener is inserted into the bolt through-hole. The snap-fit ​​component has a mounting hole for screwing into the fastener. The fastener is a screw, and the mounting groove on the upper end face of the extension allows the screw head to face upwards, while the shank screws into the mounting hole on the snap-fit ​​component. This design allows the operator to easily rotate the fastener by inserting a screwdriver into the mounting groove, making the keg holder easier to install and remove. Compared to existing technologies using multiple fasteners, this keg fixing structure uses only one fastener, reducing the time required for fastener installation and removal, and making the keg holder easier to clean.

[0011] In the aforementioned beer keg fixing structure of the draft beer machine, a limiting rib is also provided on the outer peripheral wall of the main body. When the keg holder rotates within the mounting base until the limiting rib abuts against the limiting protrusion, the bolt through hole and the mounting hole are aligned. After the keg holder is inserted into the mounting cavity, it is impossible to visually observe whether the bolt through hole and the mounting hole are aligned. However, by providing a limiting rib on the outer peripheral wall of the main body, the bolt through hole and the mounting hole can be quickly aligned even when not visible. This improves the convenience of keg holder installation and makes the keg fixing structure easier to clean.

[0012] In the aforementioned draft beer machine's keg fixing structure, the keg holder also includes a bowl-shaped outward-curving part connected to the upper end of the main body. The edge of the upper port of the outward-curving part radially outward-curving forms the aforementioned guide flange. The side wall of the mounting cavity has an annular stepped surface arranged circumferentially, and the bottom surface of the guide flange abuts against the annular stepped surface. The guide flange, in cooperation with the side wall of the mounting cavity, has three functions: first, it guides the insertion process of the keg holder into the mounting cavity; second, it guides the rotation process of the keg holder during disassembly and assembly; third, the bottom surface of the guide flange abuts against the annular stepped surface, causing the annular stepped surface to support the keg holder, improving the stability of the keg holder installation, and thus ensuring that the keg is stably fixed inside the draft beer machine.

[0013] In the aforementioned draft beer machine's keg fixing structure, a base plate is connected to the bottom of the housing. Several mounting posts for supporting the snap-fit ​​components are fixed to the inner wall of the base plate. These mounting posts are arranged sequentially along the circumference of the mounting base. Each mounting post is screwed with a threaded connector that passes through the snap-fit ​​component and presses it downwards. This structure allows the snap-fit ​​component to be stably installed inside the housing, thereby stably fixing the keg holder. The threaded connectors are screwed to the mounting posts, allowing the snap-fit ​​component to be removed when necessary for cleaning of both the component and the housing, further improving the hygiene of the draft beer machine.

[0014] In the aforementioned draft beer machine's keg fixing structure, the bottom surface of the extension abuts against the snap-fit ​​component, and an elongated hose mounting groove is provided on the upper surface of the extension. The mounting recess is formed on the bottom of the hose mounting groove. The bottom surface of the extension abuts against the snap-fit ​​component, allowing the snap-fit ​​component to also support the keg holder, improving the stability of the keg holder installation and thus ensuring the keg is stably fixed inside the draft beer machine. The hose mounting groove allows the beer hose to be inserted and positioned.

[0015] In the aforementioned draft beer machine's keg fixing structure, the bottom of the housing is connected to a drain connector that communicates with the mounting cavity. The upper end of the housing has a radially outward-curving positioning flange. A horizontally arranged support plate is fixed inside the housing, and the support plate has an insertion hole. The mounting base is disposed within the insertion hole, with the positioning flange resting against the edge of the insertion hole. When beer or other waste liquid enters the housing, it can be discharged through the drain connector, preventing the beer or other waste liquid from remaining inside the housing and generating bacteria, thereby improving the hygiene of the draft beer machine. In actual use, a drain pipe is also connected to the drain connector. By providing an insertion hole on the support plate and resting the positioning flange on the housing against the edge of the insertion hole, the mounting base is fixed. This structure not only makes the mounting base easy to install but also provides good installation stability.

[0016] Compared with existing technologies, the barrel fixing structure of this draft beer machine has the following advantages:

[0017] 1. In this barrel fixing structure, when the barrel stand needs cleaning, simply remove one fastener to pull the barrel stand out of the mounting cavity, allowing for quick disassembly and cleaning. Conversely, the barrel stand can be quickly reinstalled after cleaning. Therefore, this barrel fixing structure not only ensures the stability of the barrel but also features convenient disassembly, assembly, and cleaning, facilitating the long-term maintenance of good hygiene for the draft beer machine.

[0018] 2. The bottom of the housing is connected to a drain connector that communicates with the mounting cavity. When beer or other waste liquid enters the housing, the beer or other waste liquid can be discharged from the drain connector, preventing the beer or other waste liquid from remaining in the housing and generating bacteria, thereby improving the hygiene of the draft beer machine. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the draft beer machine.

[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0021] Figure 3 yes Figure 1 Rotated sectional view of the structure at point A.

[0022] Figure 4 yes Figure 3 A magnified view of a portion of the image.

[0023] Figure 5 This is a three-dimensional structural diagram of the mounting base.

[0024] Figure 6 This is a front view of the mounting bracket.

[0025] Figure 7 yes Figure 6 Sectional view of AA.

[0026] Figure 8 This is a three-dimensional structural diagram of the snap-fit ​​connector.

[0027] Figure 9 This is a three-dimensional structural diagram of the barrel base.

[0028] Figure 10 This is a top view of the barrel-shaped base.

[0029] Figure 11 This is a cross-sectional view of the beer machine after the beer keg has been placed inside.

[0030] Figure 12 yes Figure 11 Enlarged view of point A in the middle.

[0031] In the diagram, 1. Box body; 1a. Refrigeration chamber; 2. Barrel; 3. Barrel base; 31. Anti-detachment protrusion; 32. Outward folding part; 321. Guide flange; 33. Main body; 34. Extension part; 35. Mounting groove; 36. Bolt through hole; 37. Limiting rib; 38. Hose mounting groove; 4. Mounting base; 41. Mounting cavity; 42. Snap-fit ​​component; 421. Disassembly notch; 422. Limiting protrusion; 423. Mounting hole; 424. Fixing hole; 43. Shell; 44. Annular stepped surface; 45. Base plate; 46. Mounting column; 47. Positioning flange; 5. Fastener; 6. Screw connector; 7. Drain connector; 8. Support plate; 81. Insertion hole; 9. Faucet; 10. Air inlet connector; 11. Wine outlet connector; 111. Air inlet channel; 112. Wine outlet channel; 12. Wine pipe. Detailed Implementation

[0032] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0033] like Figure 1 As shown, the draft beer machine includes a housing 1, the interior of which has a refrigeration chamber 1a for placing beer kegs 2, and a tap 9 is installed on the outer wall of the housing 1.

[0034] like Figure 2 and Figure 3 As shown, the barrel fixing structure includes a barrel seat 3 for inserting and fixing a barrel 2 and a mounting base 4 fixed inside the housing 1. The mounting base 4 has a cylindrical mounting cavity 41 with an open upper end. The barrel seat 3 is inserted into the mounting cavity 41 and the mounting base 4 can support the barrel seat 3. The side wall of the mounting cavity 41 abuts against the barrel seat 3 and radially limits the barrel seat 3. The barrel seat 3 is detachably connected to a fastener 5 for fixing it to the mounting base 4. The fastener 5 is a screw.

[0035] Specifically, such as Figures 3 to 7 As shown, the cross-section of the mounting cavity 41 is circular, and the outer wall of the barrel seat 3 has a radially protruding anti-detachment protrusion 31. The mounting base 4 includes a snap-fit ​​member 42 and a cylindrical housing 43. The bottom of the housing 43 is connected to a base plate 45, and the mounting cavity 41 is formed inside the housing 43. The snap-fit ​​member 42 is disposed in the mounting cavity 41 and fixedly connected to the housing 43. The snap-fit ​​member 42 can press down on the anti-detachment protrusion 31, and the snap-fit ​​member 42 is also provided with a disassembly notch 421 with an opening size that allows the anti-detachment protrusion 31 to pass through. When the fastener 5 is removed, the barrel seat 3 can rotate to a position where the anti-detachment protrusion 31 and the disassembly notch 421 are vertically aligned.

[0036] like Figure 2 and Figure 3As shown, the bottom of the housing 43 is connected to a drain connector 7 that communicates with the mounting cavity 41. The upper end of the housing 43 has a radially outwardly turned positioning flange 47. A horizontally arranged support plate 8 is fixed inside the housing 1. The support plate 8 has a plug hole 81. The mounting base 4 is set in the plug hole 81, and the positioning flange 47 rests against the edge of the plug hole 81. In actual use, a drain pipe is also connected to the drain connector 7.

[0037] like Figure 7 and Figure 8 As shown, the snap-fit ​​component 42 is annular, and its inner edge has three circumferentially arranged limiting protrusions 422. Disassembly notches 421 are formed between adjacent limiting protrusions 422. The number of anti-detachment protrusions 31 and limiting protrusions 422 is equal, and each limiting protrusion 422 is correspondingly positioned on the upper side of each anti-detachment protrusion 31 and can press down on the corresponding anti-detachment protrusion 31. Through the cooperation of multiple anti-detachment protrusions 31 and multiple limiting protrusions 422, and with each limiting protrusion 422 arranged circumferentially, the pressure between the snap-fit ​​component 42 and the barrel seat 3 is balanced. The snap-fit ​​component 42 can more stably press down on the barrel seat 3, improving the stability of the barrel seat 3 installation, and thus enhancing the stability of securing the barrel 2.

[0038] To enable the installation of connector 42, such as Figure 3 and Figure 4 As shown, four mounting posts 46 for supporting the snap-fit ​​component 42 are fixedly connected to the inner wall of the base plate 45 of the mounting base 4. The four mounting posts 46 are arranged sequentially along the circumference of the mounting base 4. Each mounting post 46 is screwed with a screw connector 6 that passes through the fixing hole 424 on the snap-fit ​​component 42 and presses down on the snap-fit ​​component 42. The screw connector 6 is screwed to the mounting post 46, so that the snap-fit ​​component 42 can be removed when necessary, and then the snap-fit ​​component 42 and the housing 43 can be cleaned, thereby further improving the hygiene of the draft beer machine.

[0039] like Figure 9 and Figure 10 As shown, the barrel base 3 includes a cylindrical main body 33, with a bowl-shaped outward-flared portion 32 integrally formed at the upper end of the main body 33. The edge of the upper port of the outward-flared portion 32 is radially outward-flared to form a guide flange 321, which is combined with... Figure 3 and Figure 4As shown, the guide flange 321 abuts against the side wall of the mounting cavity 41. The side wall of the mounting cavity 41 has a circumferentially arranged annular stepped surface 44. The bottom surface of the guide flange 321 abuts against the annular stepped surface 44, allowing the annular stepped surface 44 to support the barrel holder 3, improving the stability of the barrel holder 3 installation, and thus ensuring the barrel 2 is stably fixed inside the draft beer machine. A protruding extension 34 is connected to the outer peripheral wall of the main body 33. The extension 34 is located above the snap-fit ​​member 42. A mounting groove 35 is provided on the upper end surface of the extension 34, and a bolt through hole 36 penetrating the bottom surface of the extension 34 is provided on the bottom of the mounting groove 35. Figure 3 As shown, there is one fastener 5, which passes through the bolt hole 36. The snap-fit ​​part 42 has a mounting hole 423 for screwing into the fastener 5. This allows the screw head to face upwards, and the operator can insert a screwdriver into the mounting groove 35 to rotate the fastener 5, making it easier to install and remove the barrel holder 3. After tightening the fastener 5, the bottom surface of the extension 34 rests against the snap-fit ​​part 42. In addition, to facilitate the installation of the barrel 12, a long strip-shaped hose mounting groove 38 is provided on the upper end surface of the extension 34, and the mounting groove 35 is formed on the bottom of the hose mounting groove 38.

[0040] Combination Figure 3 and Figure 9 As shown, the outer peripheral wall of the main body 33 is also provided with a limiting rib 37. When the barrel base 3 rotates within the mounting base 4 until the limiting rib 37 abuts against the limiting protrusion 422, the bolt through hole 36 and the mounting hole 423 are aligned. This design allows for quick alignment of the bolt through hole 36 and the mounting hole 423 even when not visible, thus improving the ease of installation of the barrel base 3.

[0041] like Figure 11 and Figure 12 As shown, when using this draft beer machine, the keg 2 is inverted and inserted into the keg base 3 with its opening facing downwards. An air inlet connector 10 is connected to the base plate 45 of the mounting base 4. One end of the beer pipe 12 is connected to the beer outlet connector 11, and the other end of the beer pipe 12 is connected to the tap 9. The beer outlet connector 11 has independent air inlet channels 111 and beer outlet channels 112. After the keg 2 is installed, high-pressure gas can sequentially enter the keg 2 through the air inlet connector 10 and the air inlet channel 111 on the beer outlet connector 11, generating high pressure inside the keg 2. Under this high pressure, the beer inside the keg 2 flows sequentially through the beer outlet channel 112 on the beer outlet connector 11 and the beer pipe 12 to the tap 9. After opening the tap 9, the beer can flow out from the tap 9.

[0042] When cleaning the barrel holder 3, simply remove the fastener 5, rotate the barrel holder 3 at a certain angle so that the anti-detachment protrusion 31 is vertically aligned with the disassembly notch 421, and then pull the barrel holder 3 outward from the mounting cavity 41 to achieve disassembly and cleaning. When installing the barrel holder 3 after cleaning, the operator simply inserts the barrel holder 3 into the mounting cavity 41, aligns it with the opening, rotates it at a certain angle so that the snap-fit ​​42 is vertically aligned with the anti-detachment protrusion 31, and then connects the fastener 5 to complete the installation of the barrel holder 3.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0044] Although this article uses the following terms extensively: 1. cabinet; 1a. refrigerator cavity; 2. barrel; 3. barrel base; 31. anti-detachment protrusion; 32. outward folding part; 321. guide flange; 33. main body; 34. extension part; 35. mounting groove; 36. bolt through hole; 37. limiting rib; 38. hose mounting groove; 4. mounting base; 41. mounting cavity; 42. snap-fit ​​component; 421. disassembly notch; 422. limiting protrusion; 423. The following terms are used: 424. Mounting hole; 43. Fixing hole; 44. Housing; 45. Annular stepped surface; 46. Base plate; 47. Mounting column; 48. Positioning flange; 5. Fastener; 6. Screw connector; 7. Drain connector; 8. Support plate; 88. Insertion hole; 9. Faucet; 10. Air inlet connector; 11. Wine outlet connector; 111. Air inlet channel; 112. Wine outlet channel; 13. Wine pipe, etc., but the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would be contrary to the spirit of the invention.

Claims

1. A keg fixing structure for a draft beer machine, the draft beer machine comprising a housing (1), the keg fixing structure comprising a keg holder (3) for inserting and fixing kegs (2) and a mounting base (4) fixed inside the housing (1), characterized in that, The mounting base (4) has a cylindrical mounting cavity (41) with an open upper end. The barrel seat (3) is inserted into the mounting cavity (41) and the mounting base (4) can support the barrel seat (3). The side wall of the mounting cavity (41) abuts against the barrel seat (3) and radially limits the barrel seat (3). The barrel seat (3) is detachably connected to a fastener (5) that fixes it to the mounting base (4). The outer side wall of the barrel seat (3) has a radially protruding anti-detachment protrusion (31). The mounting base (4) includes a snap-fit ​​member (42) and a cylindrical shell (43). The mounting cavity (41) is formed inside the shell (43). The snap-fit ​​member (42) is disposed in the mounting cavity (41) and fixedly connected to the shell (43). The snap-fit ​​member (42) can press down on the anti-detachment protrusion (31).

2. The beer barrel fixing structure of the draft beer machine according to claim 1, characterized in that, The snap-fit ​​component (42) is also provided with a disassembly notch (421) with an opening size that allows the anti-detachment protrusion (31) to pass through. The barrel seat (3) can rotate to a position where the anti-detachment protrusion (31) and the disassembly notch (421) are vertically aligned when the fastener (5) is removed.

3. The beer barrel fixing structure of the draft beer machine according to claim 2, characterized in that, The mounting cavity (41) has a circular cross-section, and the upper end of the barrel seat (3) has a circular guide flange (321), which abuts against the side wall of the mounting cavity (41).

4. The beer barrel fixing structure of the draft beer machine according to claim 2 or 3, characterized in that, The snap-fit ​​component (42) is circular. The inner edge of the snap-fit ​​component (42) has several limiting protrusions (422) arranged sequentially along the circumference. The disassembly notch (421) is formed between two adjacent limiting protrusions (422). The number of anti-detachment protrusions (31) and limiting protrusions (422) is equal. Each limiting protrusion (422) is arranged on the upper side of each anti-detachment protrusion (31) and can press down on the corresponding anti-detachment protrusion (31).

5. The beer barrel fixing structure of the draft beer machine according to claim 3, characterized in that, The fastener (5) is a screw. The barrel base (3) includes a cylindrical main body (33). A protruding extension (34) is connected to the outer peripheral wall of the main body (33). The extension (34) is located on the upper side of the snap-fit ​​member (42). An installation groove (35) is provided on the upper end surface of the extension (34). A bolt through hole (36) penetrating the bottom surface of the extension (34) is provided on the bottom of the groove of the installation groove (35). The fastener (5) is one and is inserted in the bolt through hole (36). An installation hole (423) for screwing into the fastener (5) is provided on the snap-fit ​​member (42).

6. The beer barrel fixing structure of the draft beer machine according to claim 5, characterized in that, The outer peripheral wall of the main body (33) is also provided with a limiting rib (37). When the barrel seat (3) rotates in the mounting seat (4) until the limiting rib (37) abuts against the limiting protrusion (422), the bolt through hole (36) and the mounting hole (423) are aligned.

7. The beer keg fixing structure of the draft beer machine according to claim 5, characterized in that, The barrel base (3) also includes a bowl-shaped outward-curving part (32) connected to the upper end of the main body (33). The edge of the upper port of the outward-curving part (32) is radially outward-curving to form the aforementioned guide flange (321). The side wall of the mounting cavity (41) has an annular step surface (44) arranged circumferentially. The bottom surface of the guide flange (321) abuts against the annular step surface (44).

8. The beer barrel fixing structure of the draft beer machine according to claim 2 or 3, characterized in that, The bottom of the housing (43) is connected to a base plate (45). Several mounting posts (46) for supporting the snap-fit ​​(42) are fixed on the inner wall of the base plate (45). Several mounting posts (46) are arranged sequentially along the circumference of the mounting base (4). Each mounting post (46) is screwed with a screw (6) that passes through the snap-fit ​​(42) and presses down on the snap-fit ​​(42).

9. The beer barrel fixing structure of the draft beer machine according to claim 5, characterized in that, The bottom surface of the extension (34) abuts against the snap-fit ​​member (42), and a long strip-shaped hose mounting groove (38) is also provided on the upper end surface of the extension (34), and the mounting groove (35) is provided on the bottom of the hose mounting groove (38).

10. The beer barrel fixing structure of the draft beer machine according to claim 2 or 3, characterized in that, The bottom of the housing (43) is connected to a drain connector (7) that communicates with the mounting cavity (41). The upper end of the housing (43) has a radially outwardly turned positioning flange (47). A horizontally arranged support plate (8) is fixed inside the box (1). The support plate (8) has a plug hole (81). The mounting base (4) is set in the plug hole (81) and the positioning flange (47) rests against the edge of the plug hole (81).

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