A food grade carbon dioxide filling device

Abstract

This utility model relates to the technical field of gas filling equipment, specifically a food-grade carbon dioxide filling device. It includes a connecting branch pipe with a plug fixedly connected to it. One end of the plug is fixedly connected to a valve device. A filling tank is located on one side of the valve device. The valve device has a conical chamber, a stroke chamber, and an inlet chamber. The conical chamber mates with the plug. A fixed plate with multiple air holes is located in the inlet chamber. A limiting spring connects the fixed plate and a sealing plate. A movable rod connects the sealing plate and passes through the fixed plate to the stroke chamber. The conical chamber, in conjunction with the plug, achieves initial sealing of the gas path, reducing gas leakage. The valve device, with its movable rod, sealing plate, and limiting spring working in tandem, precisely controls the gas path, ensuring controllable filling. The filling tank has an exhaust valve for easy adjustment of internal pressure, improving safety. The overall structure is compact, and the gas transmission is stable, meeting the safe filling requirements for food-grade carbon dioxide.

Description

Technical Field

[0001] This utility model relates to the technical field of gas filling equipment, specifically a food-grade carbon dioxide filling device. Background Technology

[0002] Food-grade carbon dioxide is widely used in the beverage, beer, and food preservation industries, and it has extremely stringent requirements for purity, moisture content, and odor impurities.

[0003] Currently, traditional hydraulic pipeline connections mostly use threaded connections (such as compression fittings and flared connections) or flange connections. Existing carbon dioxide filling devices mostly use industrial-grade gas filling structures, which have the following problems: the connection between the filling joint and the gas cylinder uses ordinary thread seals, and the threaded connection is prone to wear and failure due to long-term use; the gas circuit relies on manual valve control, and if the valve is not closed in time after filling, it is easy to cause gas residue leakage, which poses a safety hazard. Utility Model Content

[0004] To overcome the shortcomings of existing technologies and solve the problems of sealing failure caused by long-term use of threaded connections and easy leakage of gas circuits controlled by manual valves, this utility model proposes a food-grade carbon dioxide filling device.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a food-grade carbon dioxide filling device, including a connecting branch pipe, a plug fixedly connected to one end of the connecting branch pipe, a fixing sleeve fixedly connected to the surface of the plug, a snap-fit ​​device provided on the fixing sleeve, a valve device inserted into one end of the plug, a positioning sleeve provided on one side of the valve device, an inflation tank provided on the other side of the valve device, and an exhaust valve provided on the top of the inflation tank.

[0006] The valve device includes a cylindrical shell, which is fixedly connected to the air tank. A conical chamber is formed within the inner cavity of the cylindrical shell and is connected to a plug. A stroke chamber is located on one side of the conical chamber and is connected to the conical chamber. An intake chamber is located on one side of the stroke chamber and is connected to the stroke chamber. The other side of the intake chamber is connected to the air tank. A fixed plate is fixedly connected to the intake chamber. Multiple air holes are formed on the surface of the fixed plate. A limit spring is fixedly connected to one side of the fixed plate. A sealing plate is fixedly connected to one end of the limit spring. The sealing plate is located outside the intake chamber. A movable rod is fixedly connected to one side of the sealing plate. One end of the movable rod passes through the intake chamber and extends into the stroke chamber. The movable rod passes through the fixed plate and is slidably connected to it.

[0007] Preferably, one end of the plug is fixedly connected to a guide tube, and the guide tube slides in conjunction with the travel chamber.

[0008] Preferably, one end of the guide tube is fixedly connected to a support column, and there are two support columns.

[0009] Preferably, one end of each of the two support columns is fixedly connected to a top plate, and the surface of the top plate is provided with a concave arc surface.

[0010] Preferably, the locking device includes a base, which is fixedly connected to the surface of the fixing sleeve. A locking claw is movably connected inside the base via a connecting shaft. A pre-tensioning spring is fixedly connected to the surface of the locking claw. One end of the pre-tensioning spring is fixedly connected to the surface of the fixing sleeve. The claw hook of the locking claw is used in conjunction with the positioning sleeve.

[0011] Preferably, the other end of the claw is fixedly connected to a pressing seat, and the surface of the pressing seat is provided with an anti-slip pad.

[0012] Preferably, a slot is provided on one side of the positioning sleeve, and the slot engages with the claw hook of the claw.

[0013] The advantages of this utility model are:

[0014] This invention features a valve device. Gas flow is controlled by inserting a plug and pushing a movable rod, which in turn pushes a sealing disc, disengaging it from the outside of the intake chamber. This allows the valve device to connect to the intake chamber, ensuring normal gas flow. Mechanical triggering eliminates the need for manual valve control. After unplugging, a limit spring in the valve device automatically resets the sealing disc, cutting off gas flow. This "connection opens, disconnection shuts off" simplifies operation and prevents leaks caused by human error. The plug and valve device use a conical chamber insertion mechanism; the conical surface self-positions and fits tightly, forming a preliminary seal to prevent leakage during food-grade carbon dioxide transport, ensuring material utilization and a safe filling environment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3This is a partial structural diagram of the valve device and locking device of this utility model;

[0019] Figure 4 For the present utility model Figure 3 Enlarged view of point B in the middle;

[0020] Figure 5 For the present utility model Figure 3 Enlarged diagram of point C in the middle.

[0021] In the diagram: 1. Connecting branch pipe; 2. Plug; 21. Guide pipe; 22. Support column; 23. Top plate; 24. Concave arc surface; 3. Fixing sleeve; 4. Snap-fit ​​device; 41. Base; 42. Claw; 43. Preload spring; 44. Pressing seat; 45. Anti-slip pad; 5. Positioning sleeve; 51. Slot; 6. Valve device; 61. Cylindrical shell; 62. Conical chamber; 63. Stroke chamber; 64. Intake chamber; 65. Fixing plate; 66. Air hole; 67. Limiting spring; 68. Sealing plate; 69. Moving rod; 7. Air tank; 71. Exhaust valve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0024] This application discloses a food-grade carbon dioxide filling device. (Refer to...) Figure 1 , Figure 2 Figure 3 and Figure 4 A food-grade carbon dioxide filling device includes a connecting branch pipe 1, a plug 2 fixedly connected to one end of the connecting branch pipe 1, a fixing sleeve 3 fixedly connected to the surface of the plug 2, a snap-fit ​​device 4 provided on the fixing sleeve 3, a valve device 6 inserted into one end of the plug 2, a positioning sleeve 5 provided on one side of the valve device 6, an inflation tank 7 provided on the other side of the valve device 6, and an exhaust valve 71 provided on the top of the inflation tank 7.

[0025] The valve assembly 6 includes a cylindrical housing 61, which is fixedly connected to the air tank 7. A conical chamber 62 is formed within the inner cavity of the cylindrical housing 61. The conical chamber 62 is plugged into the plug 2. A stroke chamber 63 is provided on one side of the conical chamber 62, and the stroke chamber 63 communicates with the conical chamber 62. An intake chamber 64 is provided on one side of the stroke chamber 63, and the intake chamber 64 communicates with the stroke chamber 63. The other side of the intake chamber 64 is connected to the air tank 7. A fixed plate 65 is fixedly connected inside the intake chamber 64. Multiple air holes 66 are formed on the surface of the fixed plate 65. One side of the fixed plate 65 is fixed... A limiting spring 67 is connected, with a sealing disc 68 fixedly connected to one end of the limiting spring 67. The sealing disc 68 is located outside the intake chamber 64. A movable rod 69 is fixedly connected to one side of the sealing disc 68. One end of the movable rod 69 passes through the intake chamber 64 and extends into the stroke chamber 63. The movable rod 69 passes through the fixed disc 65 and is slidably connected to it. By setting the plug 2 to cooperate with the conical chamber 62 of the valve device 6, it forms a key component for air passage connection after insertion, directly determining whether the air passage is connected. By setting the shape of the conical chamber 62 to match the plug 2, a tight initial seal is formed after the plug 2 is inserted, reducing the risk of gas leakage. Leakage at the connection point is prevented, and the plug 2 is precisely inserted into the travel chamber 63. A sealing gasket is provided between the conical chamber 62 and the travel chamber 63. When the plug 2 is inserted into the travel chamber 63 through the conical chamber 62, the sealing gasket is fixed to the end of the plug 2, further improving the sealing performance. The conical design of the plug 2 works in conjunction with the conical chamber 62 and the travel chamber 63 in the cylindrical shell 61. For the conical fit to form a "surface contact" seal, the greater the gas pressure, the stronger the extrusion force between the conical surfaces. The sealing performance increases synchronously with the system pressure, significantly reducing the risk of leakage. The travel chamber 63 provides movement space for the movable rod 69. When plug 2 is inserted, plug 2 will push the movable rod 69 to move in the stroke chamber 63, thereby triggering the air passage connection of the air intake chamber 64. It is the key chamber for "mechanical trigger on / off". The air intake chamber 64 is set to connect the stroke chamber 63 with the inside of the air tank 7. The fixed plate 65 and the air hole 66 are the necessary channels for gas to enter and exit the air tank 7. The internal components directly control the air passage on / off. Fixed in the air intake chamber 64, its function is to support the limit spring 67. At the same time, the air hole 66 on the surface provides a channel for gas flow. The exhaust valve 71 is set. When using it later, the exhaust valve 71 can be opened.

[0026] Reference Figure 3 , Figure 4 and Figure 5One end of the plug 2 is fixedly connected to a guide tube 21, which slides in conjunction with the stroke chamber 63. One end of the guide tube 21 is fixedly connected to a support column 22, which has two columns. One end of the two support columns 22 is fixedly connected to a top plate 23. The surface of the top plate 23 is provided with a concave arc surface 24. By sliding in conjunction with the stroke chamber 63, it provides precise guidance for the insertion of the plug 2, avoiding deviation and enhancing the stability of the plug 2 after docking with the valve device 6. The concave arc surface 24 contacts the movable rod 69, increasing the contact area and allowing the plug 2 to smoothly push the movable rod 69 when inserted, avoiding localized force that could damage or jam the movable rod 69. It also conforms to the shape of the end of the movable rod 69, ensuring precise alignment between the top plate 23 and the movable rod 69, preventing slippage during pushing, and ensuring stable transmission of thrust.

[0027] Reference Figure 1 , Figure 3 and Figure 4 The locking device 4 includes a base 41, which is fixedly connected to the surface of the fixing sleeve 3. A locking claw 42 is movably connected inside the base 41 via a connecting shaft. A pre-tension spring 43 is fixedly connected to the surface of the locking claw 42. One end of the pre-tension spring 43 is fixedly connected to the surface of the fixing sleeve 3. The claw hook of the locking claw 42 cooperates with the positioning sleeve 5. The other end of the locking claw 42 is fixedly connected to a pressing seat 44. The surface of the pressing seat 44 is provided with an anti-slip pad 45. A locking groove 51 is opened on one side of the positioning sleeve 5, which engages with the claw hook of the locking claw 42. By setting the pre-tension spring 43, the locking claw 42 is provided with a locking force under the elastic force of the pre-tension spring 43. The tension force allows the claw 42 to be engaged in the slot 51 of the positioning sleeve 5, providing support and fixation. The hook-shaped design of the claw 42 ensures that it is firmly engaged in the slot 51 under high pressure impact, preventing it from falling off due to radial impact from the pipe. The pressing seat 44 and anti-slip pad 45 facilitate pressing the claw 42, making it easy for it to disengage or engage in the slot 51. The anti-slip pad 45 increases friction, preventing slippage during pressing and improving the pressing effect. The engaging structure has two sets of opposing supports, ensuring even force distribution and facilitating pressing operations. The slot 51 also has two corresponding sets.

[0028] Working principle: During operation, first connect one end of the branch pipe 1 to the inflation device to prepare for CO2 delivery. Then, insert the plug 2 at the other end of the branch pipe 1 into the conical chamber 62 of the valve device 6. The guide tube 21 at the end of the plug 2 will slide along the travel chamber 63 of the valve device 6, providing precise guidance for the plug 2 and ensuring that the plug 2 and the conical chamber 62 are completely fitted together, achieving a preliminary seal and preventing CO2 leakage. During the insertion process, the locking device 4 on the fixing sleeve 3 operates synchronously, and the claws 42... The plug 2 is temporarily opened by the pressure of the positioning sleeve 5. After the plug 2 is fully inserted, the claw 42 returns to its original position under the elastic force of the pre-tension spring 43. Its claw hook will engage in the slot 51 of the positioning sleeve 5, firmly locking the plug 2 and the valve device 6 to prevent the connection from falling off due to air pressure impact during filling. After the plug 2 is fully inserted, the top plate 23 at the end of the plug 2 is fixed to the guide tube 21 by the support column 22 and will contact the movable rod 69 in the stroke chamber 63. Since the surface of the top plate 23 has a concave arc surface 24, it can contact the movable rod 69. With the end precisely fitted, the continued insertion force pushes the movable rod 69 towards the air intake chamber 64. As the movable rod 69 moves, it compresses the limiting spring 67 of the fixed sealing disc 68, causing the sealing disc 68 to disengage from the opening of the air intake chamber 64. The air passage that was originally blocked by the sealing disc 68 is now open. At this point, food-grade CO2 can flow from the connecting branch pipe 1 into the plug 2, pass through the conical chamber 62 and the stroke chamber 63 into the air intake chamber 64, and then enter the inflation tank through the multiple air holes 66 on the fixed disc 65. Inside cylinder 7, gas filling is completed. After filling, the gas path is closed and the components are separated. After the cylinder 7 is filled to the target pressure, the operator presses the anti-slip pad 45 of the locking device 4 to increase friction and prevent slippage. The pressing force overcomes the elasticity of the pre-tightening spring 43, causing the claw 42 to rotate around the connecting shaft and the claw hook to disengage from the slot 51, releasing the lock between the plug 2 and the valve device 6. When the plug 2 is pulled out, the guide tube 21 slides in the opposite direction along the stroke chamber 63, and the pushing force of the top plate 23 on the moving rod 69 disappears. At this time, the limit spring 67 returns to its deformation, pushing the sealing plate 68 to reset, re-blocking the opening of the air inlet chamber 64, cutting off the gas path, and preventing CO2 leakage from the cylinder 7. Finally, the plug 2 is completely pulled out, and the entire filling process is completed. The cylinder 7 can be removed from the device for subsequent processing.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A food-grade carbon dioxide filling device, comprising a connecting branch pipe (1), characterized in that: One end of the connecting branch pipe (1) is fixedly connected to a plug (2), and a fixing sleeve (3) is fixedly connected to the surface of the plug (2). A snap-fit ​​device (4) is provided on the fixing sleeve (3). One end of the plug (2) is inserted into a valve device (6). A positioning sleeve (5) is provided on one side of the valve device (6). An air tank (7) is provided on the other side of the valve device (6). An exhaust valve (71) is provided on the top of the air tank (7). The valve assembly (6) includes a cylindrical shell (61) which is fixedly connected to the air tank (7). A conical chamber (62) is formed within the inner cavity of the cylindrical shell (61). The conical chamber (62) is plugged into a connector (2). A stroke chamber (63) is provided on one side of the conical chamber (62) and is connected to the conical chamber (62). An intake chamber (64) is provided on one side of the stroke chamber (63) and is connected to the stroke chamber (63). The other side of the intake chamber (64) is connected to the air tank (7). 4) A fixed plate (65) is fixedly connected inside. The surface of the fixed plate (65) is provided with air holes (66). There are multiple air holes (66). A limit spring (67) is fixedly connected to one side of the fixed plate (65). A sealing plate (68) is fixedly connected to one end of the limit spring (67). The sealing plate (68) is located outside the air intake chamber (64). A movable rod (69) is fixedly connected to one side of the sealing plate (68). One end of the movable rod (69) passes through the air intake chamber (64) and extends into the stroke chamber (63). The movable rod (69) passes through the fixed plate (65) and is slidably connected to it.

2. The food-grade carbon dioxide filling device according to claim 1, characterized in that: One end of the plug (2) is fixedly connected to a guide tube (21), and the guide tube (21) slides in conjunction with the travel chamber (63).

3. The food-grade carbon dioxide filling device according to claim 2, characterized in that: One end of the guide tube (21) is fixedly connected to a support column (22), and there are two support columns (22).

4. The food-grade carbon dioxide filling device according to claim 3, characterized in that: One end of each of the two support columns (22) is fixedly connected to a top plate (23), and the surface of the top plate (23) is provided with a concave arc surface (24).

5. The food-grade carbon dioxide filling device according to claim 1, characterized in that: The snap-fit ​​device (4) includes a base (41), which is fixedly connected to the surface of the fixed sleeve (3). A snap-fit ​​claw (42) is movably connected inside the base (41) via a connecting shaft. A pre-tension spring (43) is fixedly connected to the surface of the snap-fit ​​claw (42). One end of the pre-tension spring (43) is fixedly connected to the surface of the fixed sleeve (3). The claw hook of the snap-fit ​​claw (42) is used in conjunction with the positioning sleeve (5).

6. The food-grade carbon dioxide filling device according to claim 5, characterized in that: The other end of the claw (42) is fixedly connected to a pressing seat (44), and the surface of the pressing seat (44) is provided with an anti-slip pad (45).

7. A food-grade carbon dioxide filling device according to claim 5, characterized in that: The positioning sleeve (5) has a slot (51) on one side, and the slot (51) engages with the claw hook of the claw (42).

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