Method for producing water outlet valve kit for raw beer barrel opening

Abstract

A method for manufacturing a water outlet valve assembly for a raw beer barrel opening comprises a water outlet valve and comprises the following steps that an upper pipe body is formed in a dewaxing casting mode or a metal injection molding mode or a pipe fitting stamping mode or a pipe fitting hydraulic machining mode; a neck part is formed below the upper pipe body, and an inner ring part which is shrunk inwards is formed on the inner wall surface of the bottom of the neck part; a combination part is formed above the neck part through lathe work or stamping or hydraulic machining; a lower pipe body is formed in a dewaxing casting or metal injection molding or pipe fitting stamping or pipe fitting hydraulic processing mode, and the lower pipe body is a hollow cylinder and is provided with a hollow runner; a buckling part is arranged below the lower pipe body, and an inner concave part of which the outer diameter shrinks inwards for a certain distance along the radial direction is formed above the lower pipe body; the radial section of the inner concave part is smaller than that of the corresponding upper pipe body; during combination, an inward concave part is formed between the inner concave part and the inner wall surface of the upper pipe body; and the weight of the whole device can be reduced.

Description

TECHNICAL FIELD

[0001] The present invention relates to a tapping valve for a draft beer, in particular, a method for manufacturing a tapping valve assembly for a draft beer keg opening. BACKGROUND

[0002] In the present human life, beer has been an indispensable beverage in daily life. Generally, beer is sold through various consumer bottles such as bottles and cans. However, this beer filling method is only suitable for long-term storage beer, and the freshness of these beers is relatively low. Generally, the freshness of the draft beer sold on the market is higher than that of the bottled or canned beer. The filling method of the beer sold on the market is not using bottles or cans, but using beer kegs suitable for draft beer. These beer kegs have a large volume, so they can fill a large amount of draft beer at a time. In contrast, a specially designed tapping valve and dispenser must be used to draw draft beer for sale. In order to achieve good preservation and dispensing purposes, the tapping valve must have excellent quality, generally requiring light weight, good rigidity and long service life.

[0003] The manufacturing method of the tapping valve assembly in the prior art is a two-step process of one-piece lost wax casting or lost wax casting and welding of the lower pipe, which results in a relatively heavy and complicated tapping valve assembly, or a three-step process is used to manufacture the tapping valve assembly, which is relatively complicated. The overall process not only leads to an increase in manufacturing cost, but also does not meet the economic benefits.

[0004] The inventor of the present invention, based on long-term experience in this industry, hopes to propose a new method for manufacturing a tapping valve assembly for a draft beer keg opening to provide a tapping valve device suitable for a beer keg for draft beer. SUMMARY

[0005] Therefore, the purpose of the present invention is to solve the above-mentioned problems in the prior art. In the present invention, a method for manufacturing a tapping valve assembly for a draft beer keg opening is proposed. The fine industrial method is applied so that the radial cross section of the inner recess of the lower pipe body is smaller than the corresponding radial cross section of the upper pipe body along the axial cross section. Therefore, when the upper pipe body and the lower pipe body are combined, the inner recess will have an inwardly recessed portion with the inner wall surface of the upper pipe body, thereby forming a cavity. The cavity can effectively reduce the overall material cost and weight. Moreover, the entire manufacturing process is easy to perform and can improve production efficiency.

[0006] Therefore, the present invention proposes a method for manufacturing a water outlet valve kit for the opening of a draft beer barrel, including a water outlet valve. The manufacturing process of the water outlet valve includes the following steps: forming an upper tube body by lost wax casting or metal injection molding or pipe stamping or pipe hydraulic processing. The upper tube body is a hollow cylinder with a hollow flow channel and an inner wall of which is a straight cylinder; an upper opening 1 is formed above the hollow flow channel of the upper tube body, and a lower opening 2 is formed below; a neck is formed below the upper tube body, and the neck appearance The surface is a smooth arc surface; the inner wall surface of the bottom of the neck forms an inward-contracted inner ring; a joint is formed on the top of the neck by lathe, stamping or hydraulic processing; it is used to be screwed on the top of the beer barrel; the top of the joint is connected to the upper opening, and the outer diameter of the joint is larger than the outer diameter of the neck; a lower tube body is formed by lost wax casting or metal injection molding or pipe stamping or pipe hydraulic processing, wherein the lower tube body is a hollow cylinder, which has a hollow flow channel, wherein the hollow flow channel of the lower tube body is An upper opening 2 is formed on the top, and a lower opening 2 is formed below it; wherein the bottom of the lower tube body is a buckle part, and the bottom of the buckle part is connected to the lower opening 2; by using lost wax casting or metal injection molding or pipe stamping or pipe hydraulic processing, an inner concave part with an outer diameter radially contracted for a distance is formed on the top of the lower tube body; along the same radial cross section, the radial cross section of the inner concave part is smaller than the corresponding radial cross section of the upper tube body; the outer diameter of the bottom of the inner concave part is larger than the inner diameter of the inner ring part; wherein the outer diameter of the buckle part of the lower tube body is smaller than the outer diameter of the upper tube body The inner diameter of the tube body, therefore, when assembled, the lower tube body is passed through the upper tube body, and the outer side of the bottom of the inner recess will abut against the inner ring portion of the upper tube body; after assembly, because the inner recess of the upper tube body is in an inwardly contracted shape, an inwardly recessed portion is formed between the inner recess and the inner wall surface of the upper tube body, and after assembly, this recessed portion forms a cavity; the overall weight of the entire device can be reduced; when the hollow flow channel of the upper tube body and the hollow flow channel of the lower tube body are combined together, an air flow channel is formed as a whole.

[0007] Furthermore, the inner recess includes an enlarged portion from top to bottom, and a conical portion located below the enlarged portion. The shape of the conical portion is inwardly contracted from bottom to top along the axial direction, and has the shape of a conical column, and an outwardly enlarging annular convex portion is formed below the conical portion, and a first radially extending ring extending radially outward is formed at the lowermost edge of the annular convex portion; the enlarged portion is formed above the conical portion, which gradually enlarges from bottom to top to form a stepped shape; and its uppermost edge extends radially outward to form a second radially extending ring.

[0008] Furthermore, punching or stamping is applied to form at least one buckling structure on the edge of the second lower opening of the lower tube body, and the buckling structure is used to buckle a liquid delivery pipe connected to the outside.

[0009] Further, the fastening structure is in the form of a fastening groove, one side of which is connected to the lower opening II, and is used to fasten a liquid conveying pipe connected externally.

[0010] Further, the fastening structure is in the form of a flange, which extends radially into the pipe, and is used to fasten a liquid conveying pipe connected externally.

[0011] Further, a plurality of perforations are punched or stamped on the annular surface of the fastening portion, which are connected to the inner and outer surfaces of the fastening portion; wherein the plurality of perforations are symmetrically arranged along the annular surface of the fastening portion.

[0012] Further, the outer side of the second radially extending ring abuts against the inner wall surface of the neck portion, and the first radially extending ring is adapted to abut against the inner annular portion of the neck portion and is welded to the upper pipe body.

[0013] Further, at least one fastener is formed on the outer edge of the top of the joint portion by turning, stamping or hydraulic processing, which protrudes radially outward.

[0014] Further, threads are formed on the outer surface of the joint portion by turning, stamping or hydraulic processing.

[0015] Further, a fastening hole is punched or stamped on the annular surface of the fastening portion, which is connected to the inner and outer surfaces of the fastening portion, and is used to fasten a liquid conveying pipe connected externally.

[0016] Further, the maximum radial distance difference of the cavity is greater than 0.1 cm.

[0017] Further, two protrusions are formed on one edge of the upper opening of the upper pipe body by lost-wax casting, metal injection molding, pipe stamping or pipe hydraulic processing, and the bottom of each protrusion has an inclination to conform to the installation of an external distributor to be connected. The features and advantages of the present application can be further understood from the following description, and the accompanying drawings are referred to for reading. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structural diagram of the present application is shown; Figure 2 The connection diagram of the upper pipe body and the lower pipe body of the present application is shown; Figure 3 The cross-sectional view along A-A' is shown; Figure 1 Another embodiment of the joint portion of the present application is shown; Figure 4 The cross-sectional view of another embodiment of the joint portion of the present application is shown, wherein The cross-sectional view along B-B' is shown; Figure 5 Figure 5 The cross-sectional view along B-B' is shown; Figure 4 Figure 6 ​Showing application examples of the present invention; Figure 7 A flow chart showing the steps of the present invention; Figure 8 A structural diagram showing the inner concave portion of the present invention; Figure 9 A schematic diagram showing the cavity formed between the inner concave portion and the upper tube body of the present invention; Figure 10 A cross-sectional view showing an embodiment of the buckling structure of the present invention.

[0019] Description of Reference Numerals Outlet valve 1, upper tube 10, hollow flow channel 11, joint 12, fastener 121, thread 122, neck 14, upper opening 15, lower opening 16, inner ring portion 17, lower tube 20, hollow flow channel 21, snap-fit ​​portion 22, inner recess 23, tapered portion 24, annular protrusion 241, first radially extending ring 242, upper opening 25, lower opening 26, snap-fit ​​groove 261, through-hole 262, flange 263, snap-fit ​​hole 264, snap-fit ​​structure 27, enlarged portion 28, second radially extending ring 281, liquid delivery tube 29, cavity 30, protrusion 40, bottom 42, distributor 45. DETAILED DESCRIPTION

[0020] The structural composition of the present invention, as well as the effects and advantages it can produce, is now described in detail below with reference to the accompanying drawings, taking a preferred embodiment of the present invention as an example.

[0021] Please refer to Figures 1 to 10 FIG. 1 shows a method for manufacturing a tap valve assembly for a draft beer keg opening according to the present invention, comprising the following elements: A water outlet valve 1, such as Figure 7 As shown, the process of the water outlet valve 1 is described as follows: An upper tube body 10 is formed by lost wax casting, metal injection molding, pipe stamping, or hydraulic machining. The upper tube body 10 is a hollow cylinder with a hollow flow channel 11 and a straight inner wall. An upper opening 15 is formed above the hollow flow channel 11, while a lower opening 16 is formed below. A neck 14 is formed at the bottom of the upper tube body 10. The outer surface of the neck 14 is a smooth arc, and the inner wall of the bottom of the neck 14 forms an inwardly constricted inner ring portion 17 (Step 510).

[0022] A connecting portion 12 is formed above the neck 14 by lathe, stamping, or hydraulic processing (step 520). The top of the connecting portion 12 is connected to the upper opening 15. The outer diameter of the connecting portion 12 is larger than the outer diameter of the neck 14. The connecting portion 12 is used to be fixed above an external beer keg.

[0023] The coupling portion 12 has various embodiments. In one embodiment of the present invention, the outer surface of the coupling portion 12 has a thread 122 (eg, Figure 2 In another embodiment of the present invention, the outer edge of the top of the joint portion 12 has at least one fastener 121, and the fastener 121 protrudes radially outward from the tube (e.g. Figure 4 ).

[0024] The lower tube body 20 (such as Figure 2 ), wherein the lower tube 20 is a hollow cylinder having a hollow channel 21. A second upper opening 25 is formed above the hollow channel 21, and a second lower opening 26 is formed below the hollow channel 21. A locking portion 22 is formed below the lower tube 20, and its lower portion communicates with the second lower opening 26 (step 530).

[0025] By punching or stamping, at least one buckling structure 27 is formed on the bottom edge of the second lower opening 26 of the lower tube body 20. The buckling structure 27 is used to buckle a liquid delivery pipe 29 connected to the outside (step 540).

[0026] The buckle structure 27 has many different embodiments, wherein Figure 2 In the embodiment of the present invention, the buckling structure 27 is in the form of a buckling groove 261. One side of the buckling groove 261 is connected to the lower opening 26, and is used to buckle the externally connected liquid delivery tube 29 when in use. In another embodiment of the present invention, the buckling structure 27 is in the form of a flange 263 (such as Figure 10 ), the flange 263 extends axially into the tube and is used to snap fit the externally connected liquid delivery tube 29 when in use.

[0027] The annular surface of the buckle portion 22 is punched or stamped with a plurality of through holes 262 (such as Figure 2 ), which communicates with the inner and outer surfaces of the buckle portion 22. When in use, the perforation 262 can be used to filter the foam in the beer. Wherein a plurality of perforations 262 are symmetrically arranged along the annular surface of the buckle portion 22 (step 550).

[0028] Apply lost wax casting or metal injection molding or pipe stamping or pipe hydraulic processing to form an inner concave portion 23 with an outer diameter that is radially contracted for a distance above the lower tube body 20 (step 560), wherein the inner concave portion 23 is formed along the outer diameter of the lower tube body 20. Figure 1 The same radial section of the A-A' axial section (such as Figure 3The inner recess 23 has a radial cross-section smaller than the corresponding radial cross-section of the upper tube body 10. The outer diameter of the bottom of the inner recess 23 is larger than the inner diameter of the inner ring portion 17, so that when the upper tube body 10 is combined with the lower tube body 20, the outer side of the inner recess 23 abuts against the inner ring portion 17. The inner recess 23 has an inwardly recessed portion with respect to the inner wall surface of the upper tube body 10, so that a cavity 30 is formed, thereby reducing the manufacturing cost.

[0029] The inner recess 23 comprises an enlarged portion 28 upwardly and a tapered portion 24 downwardly of the enlarged portion 28. The tapered portion 24 is tapered inwardly along the axial direction from bottom to top, and has a shape of a tapered column. The tapered portion 24 has an outwardly enlarged annular protrusion 241 downwardly, and a first radially extending annular ring 242 radially outwardly at the lowermost edge of the annular protrusion 241. The enlarged portion 28 is gradually enlarged from bottom to top, and has a shape of a stepped portion. The uppermost edge of the enlarged portion 28 has a second radially extending annular ring 281 radially outwardly.

[0030] The outer diameter of the engaging portion 22 of the lower tube body 20 is smaller than the inner diameter of the upper tube body 10, and the outer diameters of the first radially extending annular ring 242 and the second radially extending annular ring 281 are slightly equal to the inner diameter of the upper tube body 10. Therefore, the lower tube body 20 can be inserted through the upper opening 15 of the upper tube body 10, and the outer side of the second radially extending annular ring 281 abuts against the inner wall surface of the neck portion 14, and the first radially extending annular ring 242 abuts against the inner ring portion 17 of the neck portion 14.

[0031] The upper opening 15 of the upper tube body 10 is formed by using a lost-wax casting or a metal injection molding or a pipe stamping or a pipe hydraulic processing, and two protrusions 40 are formed at the edge of the upper opening 15. The bottom 42 of each protrusion 40 has an inclination to conform to the installation of an external distributor 45 (step 570).

[0032] When the lower tube body 20 is assembled in the upper tube body 10, the lower tube body 20 is inserted through the upper opening 15 of the upper tube body 10, so that the outer side of the second radially extending annular ring 281 abuts against the inner wall surface of the neck portion 14 of the upper tube body 10, and the first radially extending annular ring 242 abuts against the inner ring portion 17 of the neck portion 14. Then, the upper tube body 10 and the lower tube body 20 are joined by using a welding process (step 580).

[0033] The annular surface of the engaging portion 22 is punched or stamped to form an engaging hole 264, which communicates between the inner and outer surfaces of the engaging portion 22, and is used to engage the liquid delivery pipe 29 connected externally (step 590).

[0034] After the combination, the inner recess 23 of the lower tube body 20 has a same radial cross-section along the axial cross-section (as shown by the line D-D' in FIG. 6), and the inner recess 23 has a radial cross-section smaller than the corresponding radial cross-section of the upper tube body 10. The outer diameter of the bottom of the inner recess 23 is larger than the inner diameter of the inner ring portion 17, so that when the upper tube body 10 is combined with the lower tube body 20, the outer side of the inner recess 23 abuts against the inner ring portion 17. The inner recess 23 has an inwardly recessed portion with respect to the inner wall surface of the upper tube body 10, so that a cavity 30 is formed, thereby reducing the manufacturing cost. Figure 3The radial cross section of the inner recess 23 of the lower pipe body 20 (the radial cross section of the line D-D' of the inner recess 23) is smaller than the radial cross section of the neck 14 of the upper pipe body 10. Thus, a cavity 30 is formed between the inner wall surface of the taper 24 and the inner recess 23. The overall weight of the device can be reduced.

[0035] When the hollow flow passage 11 of the upper pipe body 10 and the hollow flow passage 21 of the lower pipe body 20 are combined together, an air flow passage is formed, which can accommodate the liquid delivery pipe 29.

[0036] The advantage of the present application is that fine industrial techniques are applied so that along the same axial cross section, the radial cross section of the inner recess of the lower pipe body is smaller than the radial cross section of the corresponding upper pipe body. Thus, when the upper pipe body and the lower pipe body are combined, the inner recess will form an inward recess with the inner wall surface of the upper pipe body, thus forming a cavity, which can effectively reduce the overall material cost and weight. The overall manufacturing procedure is easy to perform and can improve production efficiency.

[0037] The above detailed description is directed to a feasible embodiment of the present application, which is not intended to limit the patent scope of the present application. Any equivalent implementation or change made without departing from the spirit of the present application shall be included in the patent scope of the present application.

Claims

1. A method for manufacturing a water outlet valve kit for a draft beer keg opening, characterized in that: The invention comprises a water outlet valve, and the process of manufacturing the water outlet valve comprises the following steps: An upper tube body is formed by lost wax casting, metal injection molding, tube stamping, or tube hydraulic processing. The upper tube body is a hollow cylinder having a hollow flow channel and an inner wall of the upper tube body having a straight cylindrical shape. An upper opening is formed above the hollow flow channel of the upper tube body, and a lower opening is formed below the upper tube body. A neck is formed below the upper tube body, and the outer surface of the neck is a smooth arc surface. The inner wall surface of the bottom of the neck forms an inwardly constricted inner ring portion. A joint is formed on the neck by lathe, stamping or hydraulic processing; the joint is used to be screwed onto the top of the beer barrel; the top of the joint is connected to the upper opening, and the outer diameter of the joint is larger than the outer diameter of the neck; A lower tube body is formed by lost wax casting, metal injection molding, tube stamping, or tube hydraulic processing, wherein the lower tube body is a hollow cylinder having a hollow flow channel, wherein an upper opening 2 is formed above the hollow flow channel of the lower tube body, and a lower opening 2 is formed below the hollow flow channel; wherein a buckle portion is formed below the lower tube body, and the lower portion is connected to the lower opening 2; A concave portion having an outer diameter radially contracted by a distance is formed above the lower tube body by using lost wax casting, metal injection molding, pipe stamping, or pipe hydraulic processing; along the same radial cross section, the radial cross section of the concave portion is smaller than the corresponding radial cross section of the upper tube body; and the outer diameter of the bottom of the concave portion is larger than the inner diameter of the inner ring portion; The outer diameter of the buckling portion of the lower tube is smaller than the inner diameter of the upper tube. When assembled, the lower tube is passed through the upper tube, and the outer side of the bottom of the inner concave portion abuts against the inner ring portion of the upper tube. After assembly, the inner concave portion of the upper tube body is in an inwardly contracted shape, and an inwardly recessed portion is formed between the inner concave portion and the inner wall surface of the upper tube body. After assembly, the recessed portion forms a cavity; The overall weight of the entire device can be reduced; When the hollow flow channel of the upper tube body and the hollow flow channel of the lower tube body are combined together, an air flow channel is formed as a whole.

2. The method for manufacturing a water outlet valve kit for a draft beer keg opening according to claim 1, characterized in that: The inner recess includes an enlarged portion from top to bottom, and a tapered portion located below the enlarged portion. The tapered portion is inwardly contracted from bottom to top along the axial direction, presenting the shape of a cone column, and an outwardly enlarged annular convex portion is formed below the tapered portion, and a first radially extended ring extending radially outward is formed at the lowermost edge of the annular convex portion; the enlarged portion is formed above the tapered portion, which gradually enlarges from bottom to top to form a stepped shape; and its uppermost edge extends radially outward to form a second radially extended ring.

3. The method for manufacturing a water outlet valve kit for a draft beer keg opening according to claim 1, characterized in that: Punching or stamping is applied to form at least one buckling structure on the edge of the second lower opening of the lower tube body, and the buckling structure is used for buckling a liquid delivery pipe connected to the outside.

4. The method for manufacturing a water outlet valve kit for a draft beer keg opening according to claim 3, characterized in that: The buckling structure is in the form of a buckling groove, one side of which is connected to the second lower opening and is used for buckling the liquid delivery pipe connected to the outside.

5. The method for manufacturing a water outlet valve kit for a draft beer keg opening according to claim 3, characterized in that: The buckle structure is in the form of a flange, which extends radially into the tube and is used for buckling the liquid delivery tube connected to the outside.

6. The method for manufacturing a water outlet valve kit for a draft beer keg opening according to claim 1, characterized in that: A plurality of through-holes are punched or stamped out on the annular surface of the buckle portion, which connect the inner and outer surfaces of the buckle portion; wherein the plurality of through-holes are symmetrically arranged along the annular surface of the buckle portion.

7. The method for manufacturing a water outlet valve kit for a draft beer keg opening according to claim 2, characterized in that: The outer side of the second radially extending ring abuts against the inner wall surface of the neck, and the first radially extending ring is adapted to abut against the inner ring portion of the neck and is welded to the upper tube body.

8. The method for manufacturing a water outlet valve kit for a draft beer keg opening according to claim 1, characterized in that: At least one fastener is formed on the outer edge of the top of the joint by lathe, stamping or hydraulic processing, and the fastener protrudes outward from the tube in the radial direction.

9. The method for manufacturing a water outlet valve kit for a draft beer keg opening according to claim 1, characterized in that: Threads are formed on the outer surface of the joint by turning, stamping or hydraulic processing.

10. The method for manufacturing a water outlet valve kit for a draft beer keg opening according to claim 1, characterized in that: A fastening hole is also punched or stamped out on the annular surface of the fastening portion, which connects the inner and outer surfaces of the fastening portion and is used to fasten a liquid delivery tube connected to the outside when in use.

11. The method for manufacturing a water outlet valve kit for a draft beer keg opening according to claim 1, characterized in that: The maximum radial distance difference of the cavity is greater than 0.1 cm.

12. The method for manufacturing a water outlet valve kit for a draft beer keg opening according to claim 1, wherein: Two convex parts are formed on an edge of the upper opening of the upper tube body by using lost wax casting, metal injection molding, pipe stamping or pipe hydraulic processing. The bottom of each convex part has a slope to accommodate the installation of a distributor to be connected externally.

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