A heating element processing device for coffee machines

Abstract

This invention discloses a heating element processing device for coffee machines, relating to the field of heating wire production equipment. The device includes a frame, an aluminum tube, and a heating wire, and further comprises: a placement plate fixedly installed within the frame, the placement plate having multiple sets of mounting holes for inserting and fixing the aluminum tube to be processed; a top plate fixed to the top of the frame; a telescopic cylinder fixed to the center of the top plate, its telescopic end passing downwards through the top plate; and a lifting plate fixedly connected to the telescopic end of the telescopic cylinder, capable of moving up and down with the piston end of the telescopic cylinder. This invention achieves three-point positioning of the heating wire by clamping the top of the heating wire with a clamping and fixing mechanism, positioning the bottom of the heating wire with a bottom rubber fixing plug, and supporting the middle of the heating wire with a limiting rod protrusion in the vibration mechanism. This effectively prevents the heating wire from skewing during installation and filling, ensuring the heating wire is coaxial with the aluminum tube, and improving the insulation performance and service life of the heating element.

Description

Technical Field

[0001] This invention belongs to the technical field of heating wire production equipment, specifically, it relates to a heating tube processing device for coffee machines. Background Technology

[0002] The heating element of a coffee machine is the core heating component. Currently, the production of coffee machine heating elements mainly includes processes such as heating wire installation, magnesium oxide powder filling, end sealing, and tube shrinking. Among these, heating wire installation and magnesium oxide powder filling are the two most critical processes, directly affecting the insulation performance and heating uniformity of the heating element.

[0003] In existing technologies, heating wire installation is usually done manually, leaving the heating wire in a free-floating state inside the aluminum tube. This makes it prone to skew, causing the heating wire to contact the inner wall of the aluminum tube, resulting in localized overheating, insulation breakdown, or even short circuits. In addition, magnesium oxide powder filling is often done using overall vibration, with vibration energy transmitted from the outside to the inside. This results in low filling density in the central area and a tendency for powder bridging and voids to occur, leading to poor product quality consistency and low production efficiency. These are some of the shortcomings of existing technologies. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a heating wire production apparatus that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is: a heating tube processing device for coffee machines, comprising a frame, an aluminum tube, a heating wire, and further comprising: A placement plate is fixedly installed inside the frame. The placement plate is provided with multiple sets of mounting holes for inserting and fixing the aluminum tube to be processed. Top plate, fixed to the top of the frame; The telescopic cylinder is fixed in the middle of the top plate, and its telescopic end passes downward through the top plate; The lifting plate is fixedly connected to the telescopic end of the telescopic cylinder and can move up and down with the piston end of the telescopic cylinder. Multiple mounting plates are fixedly connected to the bottom of the lifting platform at equal intervals; Multiple clamping and fixing mechanisms are installed at the bottom of the mounting plate and correspond one-to-one with the powder outlet pipe. They are used to clamp and fix the top of the heating wire, so that the heating wire can be inserted into the aluminum tube. The vibration mechanism, located on the lifting plate, is used to drive the heating wire to generate high-frequency micro-amplitude vibration, so that the magnesium oxide powder is densely filled inside the aluminum tube.

[0006] Furthermore, the clamping and fixing mechanism includes a fixed half-ring, a clamping half-ring, and a clamping telescopic rod. The fixed half-ring is fixed to the lower surface of the mounting plate, and the clamping telescopic rod is fixed to the lower surface of the mounting plate and located on one side of the fixed half-ring. The clamping half-ring is fixed to the piston rod end of the clamping telescopic rod. The clamping half-ring and the fixed half-ring are arranged opposite to each other to form a clamping cavity for clamping the top of the heating wire.

[0007] Furthermore, the vibration mechanism includes a vibration motor, a limiting rod, and a spring. The limiting rod is provided with a protrusion, which is used to press against the heating wire to keep the heating wire vertical inside the aluminum tube. The vibration mechanism is used to drive the heating wire to generate high-frequency micro-amplitude vibration, so that the magnesium oxide powder is densely filled inside the aluminum tube.

[0008] Furthermore, the magnesium powder box, fixed to the top plate, is used to store magnesium oxide filler powder and is equipped with a material pump inside; Multiple powder outlet pipes are connected to the bottom of the magnesium powder box and to the discharge end of the material pump to transport magnesium oxide powder into the aluminum pipe below.

[0009] Furthermore, multiple sets of vibration motors are fixed on the lifting plate, and a circular plate is fixedly connected to the top of each limiting rod. The circular plates at the top of each limiting rod abut against the output end of the vibration motor. The bottom ends of each limiting rod penetrate downward through the lifting plate and are slidably connected to the lifting plate. Multiple sets of springs are respectively sleeved on the multiple limiting rods, and the two ends of the springs abut against the circular plate at the top of the limiting rod and the lifting plate, respectively, to enable the limiting rods to continuously move up and down reciprocally.

[0010] Furthermore, multiple sets of connecting rods are detachably installed at the bottom of the lifting plate, and the other end of the connecting rods is connected to the lower mounting plate.

[0011] Furthermore, multiple sets of rubber fixing plugs are installed on the support plate at the bottom of the frame to be inserted into the empty groove at the bottom of the aluminum tube and to position the bottom end of the heating wire.

[0012] Furthermore, the rubber fixing plug is designed to be larger at the top and smaller at the bottom, so as to form an interference seal with the inner wall of the aluminum tube, thereby achieving a fixed installation.

[0013] Furthermore, the rubber fixing plug has a mounting hole at its center. The diameter of the mounting hole is smaller than that of the heating wire, which is used to form an interference fit with the cold end of the heating wire to achieve radial positioning and sealing of the bottom end of the heating wire. The rubber fixing plug is made of high-temperature resistant fluororubber material.

[0014] Furthermore, anti-slip textures are provided on the inner walls of both the fixed semi-ring and the clamping semi-ring.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention clamps the top of the heating wire with a clamping and fixing mechanism, and positions the bottom of the heating wire with a bottom rubber fixing plug, and supports the middle of the heating wire with a limiting rod protrusion in the vibration mechanism. This achieves three-point positioning of the heating wire, effectively preventing the heating wire from tilting during installation and filling, ensuring that the heating wire is coaxial with the aluminum tube, and improving the insulation performance and service life of the heating tube. Through an independent vibration mechanism, the vibration motor drives the limit rod to vibrate up and down, which in turn drives the heating wire to generate high-frequency micro-amplitude vibration, so that the magnesium oxide powder flows fully in the aluminum tube, effectively eliminating powder bridging and voids, and improving the filling density and uniformity.

[0016] The rubber retainer has a stepped structure that is larger at the top and smaller at the bottom, forming an interference seal with the inner wall of the aluminum tube. At the same time, the central mounting hole forms an interference seal with the cold end of the heating wire, achieving a double seal at the bottom of the aluminum tube and the protruding end of the heating wire, effectively preventing the leakage of magnesium oxide powder. The PLC control system automates the entire processing procedure. Combined with material and position sensors, it can automatically complete processes such as heating wire installation, magnesium oxide powder filling, and vibration compaction, thereby improving production efficiency and reducing manual labor intensity. Attached Figure Description

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the structure of a heating element processing device for a coffee machine proposed in this invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a heating element processing device for a coffee machine proposed in this invention. Figure 2 ; Figure 3 This is a schematic cross-sectional view of a heating element processing device for a coffee machine proposed in this invention. Figure 1 ; Figure 4 This is a schematic cross-sectional view of a heating element processing device for a coffee machine proposed in this invention. Figure 2 ; Figure 5 This invention provides a processing device for heating tubes in coffee machines. Figure 4 A schematic diagram of the structure of part A; Figure 6 This invention provides a processing device for heating tubes in coffee machines. Figure 4 A structural diagram of section B; Figure 7 This invention provides a processing device for heating tubes in coffee machines. Figure 4 A structural diagram of part C.

[0018] In the diagram: 1. Frame; 101. Placement plate; 2. Top plate; 301. Magnesium powder box; 302. Powder outlet pipe; 401. Aluminum pipe; 402. Heating wire; 403. Rubber fixing plug; 501. Telescopic cylinder; 502. Lifting plate; 503. Connecting rod; 504. Mounting plate; 5051. Fixing half ring; 5052. Clamping half ring; 5053. Clamping telescopic rod; 601. Vibration motor; 602. Limiting rod; 603. Spring component. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] Example: Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 A heating element processing device for a coffee machine includes a frame 1, an aluminum tube 401, a heating wire 402, a placement plate 101, a top plate 2, a telescopic cylinder 501, a lifting plate 502, multiple mounting plates 504, multiple clamping and fixing mechanisms, a vibration mechanism, a magnesium powder box 301, multiple powder outlet pipes 302, and multiple rubber fixing plugs 403.

[0021] like Figure 1 As shown, the frame 1 is welded from square steel and serves as the installation base for the entire device, providing stable support for each component. The placement plate 101 is horizontally fixed in the middle of the frame 1, and multiple sets of circular mounting holes are equally spaced along its length for inserting and fixing the aluminum tube 401 to be processed. The top plate 2 is horizontally fixed to the top of the frame 1 to support the powder supply system and drive system above.

[0022] like Figure 1 , Figure 2 As shown, the magnesium powder box 301 is fixedly installed on the upper surface of the top plate 2. It is a rectangular sealed structure used to store magnesium oxide powder. A screw-type material pump is installed at the bottom of the magnesium powder box 301 for quantitatively conveying magnesium oxide powder. The upper ends of multiple powder outlet pipes 302 are connected to the bottom of the magnesium powder box 301 and connected to the discharge end of the material pump. The lower ends of the powder outlet pipes 302 extend downward to the top of the aluminum pipe 401 to uniformly convey magnesium oxide powder into the aluminum pipe 401 below. A material sensor is installed on the inner side wall of the magnesium powder box 301 to detect the amount of magnesium oxide powder in real time. When the powder level is lower than the set value, an alarm signal is sent to the PLC control system.

[0023] The telescopic cylinder 501 is a servo electric push rod, which is fixedly installed in the middle of the top plate 2. Its telescopic end extends vertically downward through the top plate 2. The lifting plate 502 is a rectangular steel plate, and its center position is fixedly connected to the telescopic end of the telescopic cylinder 501 through a flange. It can move up and down with the piston end of the telescopic cylinder 501. Four vertical connecting rods 503 are detachably installed at the four corners of the lifting plate 502. The lower end of the connecting rod 503 is fixedly connected to the lower mounting plate 504. A position sensor is installed on one side of the lifting plate 502 to detect the vertical position of the lifting plate 502 and ensure the accuracy of the lifting action.

[0024] Specifically, such as Figure 4 , Figure 5 As shown, multiple sets of mounting plates 504 are fixedly connected to the bottom end of the connecting rod 503 at equal intervals along the length direction. Multiple sets of clamping and fixing mechanisms are respectively installed on the lower surface of each set of mounting plates 504, and correspond one-to-one with the powder outlet pipe 302. Each clamping and fixing mechanism includes a fixing half-ring 5051, a clamping half-ring 5052, and a clamping telescopic rod 5053. The fixing half-ring 5051 is fixed to the lower surface of the mounting plate 504, and the clamping telescopic rod 5053 adopts a miniature pneumatic telescopic rod for fixing. On the lower surface of the mounting plate 504 and on one side of the fixed half-ring 5051, the clamping half-ring 5052 is fixed to the piston rod end of the clamping telescopic rod 5053 and is arranged opposite to the fixed half-ring 5051 to form a clamping cavity for clamping the top of the heating wire 402. The inner walls of both the fixed half-ring 5051 and the clamping half-ring 5052 are provided with anti-slip textures to increase the friction between them and the heating wire 402 and prevent the heating wire 402 from sliding during clamping and vibration.

[0025] More specifically, such as Figure 5 , Figure 6 As shown, the vibration mechanism is mounted on the lifting plate 502 and includes multiple sets of vibration motors 601, multiple sets of limiting rods 602, and multiple sets of springs 603. The multiple sets of vibration motors 601 are fixedly installed at equal intervals along the length direction on the upper surface of the lifting plate 502, with their output ends pointing vertically downwards. A circular plate is fixedly connected to the top of each limiting rod 602. The circular plates at the top of the multiple sets of limiting rods 602 respectively abut against the output ends of the corresponding vibration motors 601. The bottom ends of the limiting rods 602 extend vertically downwards through the plate. A lifting plate 502 is slidably connected to the lifting plate 502. Multiple sets of springs 603 are respectively sleeved on multiple sets of limiting rods 602. The upper end of the spring 603 abuts against the circular plate at the top of the limiting rod 602, and the lower end abuts against the upper surface of the lifting plate 502. A protrusion is fixed on the lower side wall of each limiting rod 602. The end face of the protrusion is an arc-shaped surface that matches the outer circle of the heating wire 402. It is used to abut against the middle of the heating wire 402 so that the heating wire 402 remains vertical inside the aluminum tube 401.

[0026] When the vibration motor 601 is working, its output end generates high-frequency vibration, which drives the limit rod 602 to move up and down reciprocally. The spring 603 plays the role of reset and buffer. The vibration of the limit rod 602 is transmitted to the heating wire 402 through the protrusion, causing the heating wire 402 to generate high-frequency micro-amplitude vibration, thereby driving the surrounding magnesium oxide powder to flow and achieve uniform and dense filling.

[0027] Preferably, such as Figure 7 As shown, multiple sets of rubber fixing plugs 403 are correspondingly arranged on the support plate at the bottom of the frame 1, and correspond one-to-one with the mounting holes on the placement plate 101. The rubber fixing plugs 403 have a stepped structure with a larger upper part and a smaller lower part. The outer diameter of the upper part is 0.1-0.2mm larger than the inner diameter of the aluminum tube 401, and is used to insert into the interior of the aluminum tube 401 from the bottom end of the aluminum tube 401 to form an interference seal with the inner wall of the aluminum tube 401. The outer diameter of the lower part of the rubber fixing plug 403 is smaller than the inner diameter of the aluminum tube 401, and is adapted to the inner diameter of the positioning hole on the support plate at the bottom of the frame 1, and is used to snap into the positioning hole to realize the axial positioning of the aluminum tube 401.

[0028] Furthermore, the rubber retainer 403 has a through mounting hole at its center, the diameter of which is 0.02-0.05mm smaller than the diameter of the cold end of the heating wire 402. This hole is used to form an interference fit with the cold end of the heating wire 402, thereby achieving radial positioning and sealing of the bottom end of the heating wire 402. The rubber retainer 403 is made of high-temperature resistant fluororubber material, with a temperature resistance of not less than 250℃ and a Shore hardness of 60-70 degrees. It has good elasticity, wear resistance and sealing performance.

[0029] More specifically, this device also includes a PLC control system, which is installed in a control cabinet on one side of the frame 1. The PLC control system is electrically connected to the telescopic cylinder 501, the clamping telescopic rod 5053, the vibration motor 601, the material pump, the material sensor, and the position sensor, respectively, and is used to control the coordinated action of each component. The operator can set processing parameters, such as lifting speed, vibration frequency and vibration time, and the conveying capacity of the material pump, through the touch screen on the control cabinet.

[0030] The specific working process of this device is as follows: The operator inserts the rubber fixing plugs 403 into the bottom end of the aluminum tube 401 to be processed, and then inserts the aluminum tube 401 into the mounting hole on the placement plate 101, so that the lower part of the rubber fixing plugs 403 is locked into the positioning hole of the bottom support plate of the frame 1. Then, the heating wire 402 is inserted from the top end of the aluminum tube 401, so that the bottom end of the heating wire 402 passes through the mounting hole in the center of the rubber fixing plugs 403, thereby positioning the bottom end of the heating wire 402. The PLC control system controls the telescopic cylinder 501 to extend downwards, causing the lifting plate 502 to move downwards. When the lifting plate 502 moves to the set position, the position sensor sends a signal to the PLC control system, and the telescopic cylinder 501 stops moving. At this time, the top of the heating wire 402 is located between the fixed half ring 5051 and the clamping half ring 5052. At the same time, the protrusion on the limiting rod 602 abuts against the middle of the heating wire 402. The PLC control system controls the piston rod of the clamping telescopic rod 5053 to extend, causing the clamping half ring 5052 to move towards the fixed half ring 5051, together clamping the top of the heating wire 402. The PLC control system controls the telescopic cylinder 501 to retract its telescopic end upwards by 1-3mm, causing the lifting plate 502 to move upwards, thereby straightening the heating wire 402 and ensuring that the heating wire 402 is coaxial with the aluminum tube 401. The PLC control system starts the material pump, which transports magnesium oxide powder from the magnesium powder box 301 to the aluminum tube 401 through the powder outlet pipe 302. At the same time, the PLC control system starts the vibration motor 601, which drives the limit rod 602 to vibrate up and down, thereby driving the heating wire 402 to generate high-frequency micro-amplitude vibration. The vibration of the heating wire 402 makes the magnesium oxide powder flow fully in the aluminum tube 401 and fill the gap between the heating wire 402 and the aluminum tube 401 evenly. When the filling time reaches the set value, the material pump stops working, and the vibration motor 601 continues to work for 2-3 seconds to further compact the powder. After filling is completed, the PLC control system controls the piston rod of the clamping telescopic rod 5053 to retract, releasing the top of the heating wire 402. Then, the telescopic end of the telescopic cylinder 501 is controlled to retract upward to the initial position. Finally, the operator removes the processed heating tube semi-finished product from the placement plate 101, ready to proceed to the next process.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A heating element processing device for a coffee machine, comprising a frame (1), an aluminum tube (401), and a heating wire (402), characterized in that, Also includes: The placement plate (101) is fixedly installed inside the frame (1). The placement plate (101) is provided with multiple sets of mounting holes for inserting and fixing the aluminum tube (401) to be processed. Top plate (2), fixed to the top of frame (1); Telescopic cylinder (501) is fixed in the middle of the top plate (2), and its telescopic end passes downward through the top plate (2). The lifting plate (502) is fixedly connected to the telescopic end of the telescopic cylinder (501) and can move up and down with the piston end of the telescopic cylinder (501). Multiple mounting plates (504) are fixedly connected to the bottom of the lifting plate (502) at equal intervals; Multiple clamping and fixing mechanisms are installed at the bottom of the mounting plate (504) and correspond one-to-one with the powder outlet pipe (302) to clamp and fix the top of the heating wire (402) so that the heating wire (402) can be inserted into the aluminum tube (401); The vibration mechanism is set on the lifting plate (502) and is used to drive the heating wire (402) to generate high-frequency micro-amplitude vibration, so that the magnesium oxide powder is densely filled in the aluminum tube (401).

2. The heating element processing device for a coffee machine according to claim 1, characterized in that, The clamping and fixing mechanism includes a fixed half ring (5051), a clamping half ring (5052), and a clamping telescopic rod (5053). The fixed half ring (5051) is fixed on the lower surface of the mounting plate (504). The clamping telescopic rod (5053) is fixed on the lower surface of the mounting plate (504) and located on one side of the fixed half ring (5051). The clamping half ring (5052) is fixed at the piston rod end of the clamping telescopic rod (5053). The clamping half ring (5052) and the fixed half ring (5051) are arranged opposite to each other to form a clamping cavity for clamping the top of the heating wire (402).

3. The heating element processing device for a coffee machine according to claim 2, characterized in that, The vibration mechanism includes a vibration motor (601), a limiting rod (602), and a spring (603). The limiting rod (602) is provided with a protrusion, which is used to press against the heating wire (402) so that the heating wire (402) remains vertical inside the aluminum tube (401). The vibration mechanism is used to drive the heating wire (402) to generate high-frequency micro-amplitude vibration, so that the magnesium oxide powder is densely filled inside the aluminum tube (401).

4. The heating element processing device for a coffee machine according to claim 3, characterized in that, It also includes a magnesium powder box (301), which is fixed on the top plate (2) for storing magnesium oxide filler powder and has a material pump installed inside; Multiple powder outlet pipes (302) are connected to the bottom of the magnesium powder box (301) and connected to the discharge end of the material pump to transport magnesium oxide powder into the aluminum pipe (401) below.

5. The heating element processing device for a coffee machine according to claim 4, characterized in that, Multiple sets of vibration motors (601) are fixed on the lifting plate (502). A circular plate is fixedly connected to the top of the limiting rod (602). The circular plates at the top of the multiple sets of limiting rods (602) abut against the output end of the vibration motor (601). The bottom ends of the multiple sets of limiting rods (602) penetrate downward through the lifting plate (502) and are slidably connected to the lifting plate (502). Multiple sets of springs (603) are respectively sleeved on the multiple sets of limiting rods (602), and the two ends of the springs (603) abut against the circular plate at the top of the limiting rod (602) and the lifting plate (502) respectively, so as to make the limiting rod (602) continuously move up and down.

6. The heating element processing device for a coffee machine according to claim 1, characterized in that, The bottom of the lifting plate (502) is detachably equipped with multiple sets of connecting rods (503), and the other end of the connecting rods (503) is connected to the lower mounting plate (504).

7. The heating element processing device for a coffee machine according to claim 1, characterized in that, It also includes multiple sets of rubber fixing plugs (403), which are set on the bottom support plate of the frame (1) for inserting into the empty groove at the bottom of the aluminum tube (401) and positioning the bottom end of the heating wire (402).

8. A heating element processing device for a coffee machine according to claim 7, characterized in that, The rubber fixing plug (403) is designed with a larger top and a smaller bottom to form an interference seal with the inner wall of the aluminum tube (401), thereby achieving a fixed installation.

9. A heating element processing device for a coffee machine according to claim 8, characterized in that, The rubber fixing plug (403) has a mounting hole at its center. The diameter of the mounting hole is smaller than that of the heating wire (402). It is used to form an interference fit with the cold end of the heating wire (402) to achieve radial positioning and sealing of the bottom end of the heating wire (402). The rubber fixing plug (403) is made of high-temperature resistant fluororubber material.

10. A heating element processing device for a coffee machine according to claim 2, characterized in that, Anti-slip textures are provided on the inner walls of both the fixed semi-ring (5051) and the clamping semi-ring (5052).

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