Coffee machine heating piece welding equipment

Abstract

The invention relates to the technical field of heating pipe welding, and discloses coffee machine heating piece welding equipment which comprises a welding machine tool, and a rotatable liquid injection and expansion mechanism is arranged in a welding area of the welding machine tool and used for fixing a connector of a coffee machine heating pipe in a liquid injection and expansion mode and calibrating the connector before welding; the liquid injection expansion mechanism comprises a bread-ring-shaped air expansion base, an extension column coaxially arranged at the circle center of the air expansion base and a liquid injection expansion bag fixedly embedded in the outer wall of the extension column, and the diameter size of the extension column is smaller than the inner diameter size of the coffee machine heating pipe to be welded; by means of the twelve independent expansion chambers in the liquid injection expansion bag and the liquid supply systems and the pressure detection devices of the twelve independent expansion chambers, the coaxiality of the to-be-welded part can be monitored in real time, when tiny deviation is detected, the system can independently regulate and control the liquid injection pressure of the specific expansion chambers, precise calibration of the workpiece is achieved, and the precision of the to-be-welded part is improved. The problem that high-precision alignment is difficult to achieve through a traditional method is solved.

Description

Technical Field

[0001] This invention relates to the field of heating element welding, and more specifically, to a welding device for coffee machine heating elements. Background Technology

[0002] The welding of coffee machine heating components, especially the heating tube and the connector, requires extremely high welding quality and precision. Coffee machine heating tubes and their connectors are usually small in size and have strict requirements for coaxiality. During the welding process, the workpiece needs to remain absolutely stable. Traditional welding methods, such as manual alignment or simple clamp fixation, are not suitable.

[0003] In existing technologies, manual or simple mechanical fixtures are insufficient for achieving high-precision initial alignment and pre-welding calibration. They lack the ability to perform real-time, dynamic calibration of the workpiece before welding. Once a deviation is detected, disassembly and adjustment are often required, which is time-consuming and labor-intensive, and it is difficult to guarantee the final accuracy. To address this, we propose a welding device for coffee machine heating elements. Summary of the Invention

[0004] This invention provides a welding device for coffee machine heating elements, which solves the technical problem that related technologies lack the ability to perform real-time, dynamic calibration of the workpiece before welding. Once a deviation is found, it is often necessary to disassemble and adjust again, which is time-consuming and labor-intensive, and it is difficult to guarantee the final accuracy.

[0005] The present invention provides a welding equipment for a coffee machine heating element, comprising: a welding machine tool, wherein the welding area of ​​the welding machine tool is provided with a rotatable liquid expansion mechanism for fixing the connector of the coffee machine heating tube and calibrating it before welding by means of liquid expansion;

[0006] The liquid expansion mechanism includes a bread ring-shaped air expansion base, an extension column coaxially disposed at the center of the air expansion base, and a liquid expansion bladder fixedly embedded in the outer wall of the extension column, wherein the diameter of the extension column is smaller than the inner diameter of the heating tube of the coffee machine to be welded.

[0007] The liquid expansion bladder consists of four identical expansion bladder units. Two expansion bladder units are located at the corresponding positions of the coffee machine heating tube connector, and the other two expansion bladder units are located at the corresponding positions of the heating tube body, with each pair located in one of the two parts of the workpiece to be welded.

[0008] Each expansion bladder unit contains three independently configured expansion chambers, each equipped with a separate liquid supply system and pressure detection device;

[0009] After the initial calibration of the workpiece to be welded is completed, liquid is injected into the liquid expansion bladder to make it expand from the inside out, thereby fixing the workpiece to be welded. At the same time, the coaxiality of the two parts of the workpiece to be welded is monitored by the hydraulic data of the twelve expansion chambers. When a deviation is detected, the injection pressure of a specific expansion chamber is individually adjusted to perform the final precision calibration of the workpiece to be welded before welding.

[0010] Furthermore, an intelligent welding robotic arm is provided on one side of the welding area of ​​the welding machine tool, and an adjustable heating tube alignment arm is provided above the liquid expansion mechanism. The heating tube alignment arm is used to clamp and adjust the coffee machine heating tube, and the liquid expansion mechanism is used to clamp the connector of the coffee machine heating tube.

[0011] Furthermore, the liquid expansion mechanism also includes a rotating base installed at the bottom of the welding area of ​​the welding machine tool. The air expansion base is fixed on the rotating base. The interior of the rotating base is set to a hollow state, which serves as an equipment installation chamber. A closed door is provided on the equipment installation chamber. The liquid supply system and pressure detection device of the liquid expansion bladder are both installed in the equipment installation chamber.

[0012] Furthermore, the four expansion bladder units of the liquid expansion bladder are expansion low bladder one, expansion low bladder two, expansion top bladder one, and expansion top bladder two. Expansion low bladder one and expansion low bladder two are located at the corresponding positions of the coffee machine heating tube connector, and expansion top bladder one and expansion top bladder two are located at the corresponding positions of the heating tube body. There is a gap between the two groups of expansion low bladder one and expansion low bladder two, and expansion top bladder one and expansion top bladder two.

[0013] Furthermore, each of the twelve expansion chambers in the four expansion chamber units of the liquid expansion bladder is equipped with several high-strength bands, and these high-strength bands are inelastic. The two ends of the high-strength bands are fixed to the upper and lower walls of the expansion chamber, respectively, to ensure that the entire expansion chamber can only expand laterally and not longitudinally.

[0014] Furthermore, the inner walls of the four injection-expanding low bladder 1, injection-expanding low bladder 2, injection-expanding top bladder 1, and injection-expanding top bladder 2 are each inlaid with several longitudinal ceramic strips. These ceramic strips are distributed equidistantly along the circumference, and the outer sides of all the ceramic strips are arc-shaped surfaces.

[0015] Furthermore, the liquid supply system of the liquid inflation bladder includes a liquid storage box, the output end of which is fixedly connected to a water supply pump, the output end of which is fixedly connected to a distributor, the distributor has twelve separate channels inside, and the output end of each channel is connected to a distributor hard pipe, each distributor hard pipe corresponds to an expansion chamber and is connected to the corresponding expansion chamber, and a miniature control valve is installed on each of the twelve channels inside the distributor.

[0016] Furthermore, the pressure detection device for each expansion chamber is a hydraulic sensor, with a total of twelve sensors. The twelve hydraulic sensors are respectively installed at the outlet end of the twelve channels inside the fluid separator to detect the hydraulic status of the twelve expansion chambers.

[0017] Furthermore, a waist column is provided at the position of the welding seam between the coffee machine heating tube connector and the heating tube body. The waist column is divided into four spaces, each of which is equipped with a probe. Several colored gas ejection holes are opened on the bottom wall of the waist column.

[0018] Furthermore, an air pump is connected to the air supply end of the colored gas outlet, and a colored smoke storage box is connected to the air inlet end of the air pump.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention utilizes twelve independent expansion chambers within a liquid-filled expansion bladder, along with their respective liquid supply systems and pressure detection devices, to monitor the coaxiality of the workpiece in real time. When a slight deviation is detected, the system can individually adjust the injection pressure of a specific expansion chamber to achieve precise calibration of the workpiece. This solves the problem of traditional methods failing to achieve high-precision alignment and ensures optimal alignment before welding.

[0021] The liquid expansion method expands and fixes the parts from the inside out, providing uniform and stable support force. This avoids workpiece deformation or damage that may be caused by traditional mechanical clamps, making it especially suitable for thin-walled or easily deformable coffee machine heating parts. The initial fixing method of the air expansion base avoids applying excessive clamping force to the connector, further protecting the workpiece. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the rotating base structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the rotating base of the present invention;

[0025] Figure 4 This is a schematic diagram of the initial state structure of the liquid inflation bladder of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the liquid inflation bladder in the expanded state of the present invention;

[0027] Figure 6 This is a schematic diagram of the internal structure of the liquid inflation bladder of the present invention;

[0028] Figure 7 This is the invention Figure 6 Enlarged view of point A in the middle;

[0029] Figure 8 This is a schematic diagram of the expansion chamber structure of the present invention.

[0030] In the diagram: 11. Welding machine tool; 12. Intelligent welding robotic arm; 13. Heating tube alignment arm; 2. Liquid expansion mechanism; 21. Rotating base; 22. Air expansion base; 24. Closing door; 25. Colored smoke storage box; 26. Air pump component; 28. Liquid storage box; 29. ​​Water supply pump; 201. Flow divider; 202. Hydraulic sensor; 203. Miniature control valve; 31. Extension column; 32. Liquid expansion bladder; 321. Low expansion bladder one; 322. Low expansion bladder two; 323. Top expansion bladder one; 324. Top expansion bladder two; 33. Expansion chamber; 34. Waist column; 35. Probe head; 36. Colored gas ejection port; 37. Diverter rigid tube; 38. Beam height belt; 39. Ceramic strip. Detailed Implementation

[0031] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0032] like Figure 1 - Figure 8 As shown, a welding device for a coffee machine heating element includes: a welding machine tool 11, wherein the welding area of ​​the welding machine tool 11 is provided with a rotatable liquid expansion mechanism 2, which is used to fix the connector of the coffee machine heating tube and perform pre-welding calibration by liquid expansion.

[0033] The liquid expansion mechanism 2 includes a bread ring-shaped air expansion base 22, an extension column 31 coaxially disposed at the center of the air expansion base 22, and a liquid expansion bladder 32 fixedly embedded in the outer wall of the extension column 31, wherein the diameter of the extension column 31 is smaller than the inner diameter of the heating tube of the coffee machine to be welded.

[0034] The liquid expansion bladder 32 consists of four identical expansion bladder units. Two expansion bladder units are located at the corresponding positions of the coffee machine heating tube connector, and the other two expansion bladder units are located at the corresponding positions of the heating tube body, with each pair located in one of the two parts of the workpiece to be welded.

[0035] Each inflation bladder unit contains three independently configured expansion chambers 33, each of which is equipped with a separate liquid supply system and pressure detection device;

[0036] After the initial calibration of the workpiece to be welded is completed, liquid is injected into the liquid expansion bladder 32 to make it expand from the inside to the outside, thereby fixing the workpiece to be welded. At the same time, the coaxiality of the two parts of the workpiece to be welded is monitored by the hydraulic data of the twelve expansion chambers 33. When a deviation is detected, the injection pressure of a specific expansion chamber 33 is individually adjusted to perform the final precision calibration of the workpiece to be welded before welding.

[0037] A smart welding robotic arm 12 is provided on one side of the welding area of ​​the welding machine tool 11. An adjustable heating tube alignment arm 13 is provided above the liquid injection mechanism 2. The heating tube alignment arm 13 is used to clamp and adjust the coffee machine heating tube, and the liquid injection mechanism 2 is used to clamp the connector of the coffee machine heating tube.

[0038] By adjusting the spacing between the double low-lying bladders at the connecting head and the double top bladders at the heating tube body, independent support and deviation detection of the docking components are achieved, solving the problem of local stress concentration that is easily caused by traditional single-point fixing and improving the calibration accuracy before welding.

[0039] The liquid expansion mechanism 2 also includes a rotating base 21 installed at the bottom of the welding area of ​​the welding machine tool 11, and an air expansion base 22 fixed on the rotating base 21. The interior of the rotating base 21 is hollow and serves as an equipment installation chamber. A closed door 24 is provided on the equipment installation chamber. The liquid supply system and pressure detection device of the liquid expansion bladder 32 are both installed in the equipment installation chamber.

[0040] The four expansion bladder units of the liquid expansion bladder 32 are expansion low bladder 1 321, expansion low bladder 2 322, expansion top bladder 1 323, and expansion top bladder 2 324. Expansion low bladder 1 321 and expansion low bladder 2 322 are located at the corresponding positions of the coffee machine heating tube connector, and expansion top bladder 1 323 and expansion top bladder 2 324 are located at the corresponding positions of the heating tube body. There is a gap between each set of expansion low bladder 1 321 and expansion low bladder 2 322, and expansion top bladder 1 323 and expansion top bladder 2 324.

[0041] The twelve expansion chambers 33 of the four expansion chamber units of the liquid expansion bladder 32 are each arrayed with several high-strength bands 38, and the high-strength bands 38 are not elastic. The two ends of the high-strength bands 38 are fixed to the upper and lower walls of the expansion chamber 33 respectively, ensuring that the entire expansion chamber 33 can only expand laterally and cannot expand longitudinally.

[0042] Each expansion chamber 33 is equipped with an independent liquid supply channel and a hydraulic sensor 202. The longitudinal expansion is restricted by the height band 38 to ensure that the hydraulic data only reflects the radial contact pressure, realizing micron-level coaxiality deviation detection (<0.1mm) and solving the visual blind spot problem of manual calibration.

[0043] The outer walls of the four injection sacs 321, 322, 323, and 324 are inlaid with several longitudinal ceramic strips 39. The ceramic strips 39 are distributed equidistantly along the circumference, and the outer sides of all the ceramic strips 39 are arc-shaped.

[0044] The arc-shaped ceramic strip 39 embedded in the outer wall of the expansion bladder provides rigid support, preventing the thin-walled heating tube from deforming during the expansion process, while reducing the frictional resistance between the bladder and the tube wall and improving the calibration response speed.

[0045] It enhances the rigidity of the bladder wall, evenly distributes the supporting force, and prevents the thin-walled heating tube from being crushed.

[0046] The liquid supply system of the liquid expansion bladder 32 includes a liquid storage box 28. The output end of the liquid storage box 28 is fixedly connected to a water supply pump 29. The output end of the water supply pump 29 is fixedly connected to a distributor 201. The distributor 201 has twelve separate channels inside, and the output end of each channel is connected to a distributor hard pipe 37. Each distributor hard pipe 37 corresponds to an expansion chamber 33 and is connected to the corresponding expansion chamber 33. A miniature control valve 203 is provided on each of the twelve channels inside the distributor 201.

[0047] The pressure detection device for each expansion chamber 33 is a hydraulic sensor 202, and there are twelve in total. The twelve hydraulic sensors 202 are respectively installed at the outlet end of the twelve channels inside the fluid distributor 201 to detect the hydraulic status of the twelve expansion chambers 33.

[0048] Real-time monitoring of the coaxiality between the connector and the heating tube body, and independent adjustment of the injection pressure, enables micron-level deviation correction, solving the problem of difficult manual calibration before welding thin-walled parts.

[0049] The extension column 31 is provided with a waist column 34 at the position of the welding seam between the coffee machine heating tube connector and the heating tube body. The waist column 34 is divided into four spaces, and each space is equipped with a probe 35. The bottom wall of the waist column 34 is provided with several colored gas ejection holes 36.

[0050] After welding, colored fumes are sprayed out through the waist column 34. The airtightness of the weld is quickly tested by utilizing the sealed environment of the liquid expansion bladder 32, which replaces the traditional water pressure test, improving efficiency by 300% and eliminating residual pollution.

[0051] The supply end of the colored gas outlet 36 is connected to an air pump 26, and the inlet end of the air pump 26 is connected to a colored smoke storage box 25.

[0052] During use, the staff first inserts the connector of the coffee machine heating tube to be welded into the air expansion base 22, so that the extension post 31 passes through the inside of the connector of the coffee machine heating tube. The connector is initially fixed by the extension post 31 and the air expansion base 22. The air expansion base 22 is always in an inflated state. The connector can be fixed simply by inserting it directly. There will be no excessive force that could deform the thin connector.

[0053] Afterwards, the staff clamped the coffee machine heating tube body to be welded onto the heating tube alignment arm 13, and used the displacement of the heating tube alignment arm 13 to initially align the heating tube body with the connector. The heating tube alignment arm 13 then lowered the heating tube body so that the top of the extension post 31 was also inserted into the heating tube body.

[0054] At this time, the system controls the water supply pump 29 to work, injecting the high-temperature resistant liquid in the storage box 28 into the twelve expansion chambers 33 of the expansion bladder 1 321, expansion bladder 2 322, expansion bladder 1 323, and expansion bladder 2 324, so that the twelve expansion chambers 33 expand simultaneously, fixing the connector and the heating tube body from the inside out. At this time, the expansion coefficients of the twelve expansion chambers 33 are the same, which helps to ensure the connection between the connector and the heating tube body.

[0055] While the water supply pump 29 is supplying liquid to the twelve expansion chambers 33, the system controls the twelve micro control valves 203 to open their channels simultaneously, and the high-temperature resistant liquid is injected into the twelve expansion chambers 33 through the twelve diversion hard pipes 37 respectively.

[0056] By detecting the hydraulic pressure of the twelve expansion chambers 33 through twelve hydraulic sensors 202, the contact status of the outer walls of the four expansion chambers 321, 322, 323, and 324 with the connector and the heating tube body can be obtained. There is a gap between expansion chambers 321 and 322. If the connector is tilted, the pressure of the expansion chambers 33 in expansion chambers 321 and 322 will deviate. There is also a gap between expansion chambers 323 and 324. If the heating tube body is tilted, the pressure of the expansion chambers 33 in expansion chambers 323 and 324 will deviate. At this time, the system can determine whether there is a slight deviation between the heating tube and the connector, which is difficult for the operator to observe with the naked eye.

[0057] Based on the data from the twelve hydraulic sensors 202, the system determines which of the twelve expansion chambers 33 needs increased hydraulic pressure and controls the corresponding micro control valve 203 to open the channel and pressurize it, thereby adjusting the connector or heating tube body until precise alignment is achieved.

[0058] When the expansion chamber 33 expands, several tension bands 38 ensure that the expansion chamber 33 can only expand laterally and not longitudinally, thereby ensuring the accuracy of the hydraulic data of the expansion chamber 33. In addition, several ceramic strips 39 increase the support force on the heating tube body and the inside of the connector.

[0059] After the heating tube body and the connector are finally aligned, they are welded by the intelligent welding robotic arm 12, which rotates the workpiece while welding to achieve 360° welding.

[0060] After welding is completed, the system first controls the probe head 35 to inspect the inside of the weld. Then, the system controls the air pump 26 to spray the mist from the colored smoke storage box 25 from the colored gas outlet 36. At this time, the liquid expansion bladder 32 is in a liquid expansion state, and the weld position is not sealed in it. When the colored smoke is sprayed out, if there is a gap in the weld, the colored smoke will flow out, which can be observed by the staff. Finally, all the liquid expansion bladders 32 retract, and the welded workpiece is removed.

[0061] Initial fixation: Insert the connector into the air expansion base 22, the extension column 31 passes through the inside of the connector, and the air expansion base 22 automatically inflates to complete the initial positioning; the heating tube body is clamped by the heating tube alignment arm 13 and the weld is initially aligned.

[0062] Liquid expansion calibration: Start the water supply pump 29 to inject liquid into the twelve expansion chambers 33 simultaneously, so that the liquid expansion bladder 32 expands laterally to fix the two components; the hydraulic sensor 202 monitors the pressure difference of each chamber in real time, and the system automatically adjusts the corresponding micro control valve 203 to pressurize and correct the coaxiality deviation between the connector and the heating tube.

[0063] Precision welding: The intelligent welding robotic arm 12 is activated, and during the welding process, the rotating base 21 drives the workpiece to be welded to rotate at a constant speed, achieving 360° continuous welding.

[0064] Weld inspection: After welding is completed, the probe 35 first performs internal ultrasonic testing; then the air pump 26 sprays colored smoke from the colored gas outlet 36 to observe whether smoke seeps out in order to determine the airtightness.

[0065] Component release: Empty the liquid in the liquid inflation bladder 32, deflate the air-inflated base 22, remove the welded finished product, and proceed to the next cycle.

[0066] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of the present embodiments, all of which are within the protection scope of the present embodiments.

Claims

1. A welding device for coffee machine heating elements, characterized in that, include: Welding machine tool (11), wherein the welding area of ​​the welding machine tool (11) is provided with a rotatable liquid expansion mechanism (2) for fixing the connector of the coffee machine heating tube and calibrating it before welding by liquid expansion; The liquid inflation mechanism (2) includes a bread ring-shaped air inflation base (22), an extension column (31) coaxially disposed at the center of the air inflation base (22), and a liquid inflation bladder (32) fixedly embedded in the outer wall of the extension column (31), wherein the diameter of the extension column (31) is smaller than the inner diameter of the heating tube of the coffee machine to be welded. The liquid expansion bladder (32) is composed of four identical expansion bladder units. Two expansion bladder units are located at the corresponding positions of the coffee machine heating tube connector, and the other two expansion bladder units are located at the corresponding positions of the heating tube body, and each pair is located in one of the two parts of the workpiece to be welded. Each inflation bladder unit contains three independently configured expansion chambers (33), each expansion chamber (33) is equipped with a separate liquid supply system and pressure detection device; After the initial calibration of the workpiece to be welded is completed, liquid is injected into the liquid expansion bladder (32) to make it expand from the inside to the outside, thereby fixing the workpiece to be welded. At the same time, the coaxiality of the two parts of the workpiece to be welded is monitored by the hydraulic data of the twelve expansion chambers (33). When a deviation is detected, the final precision calibration of the workpiece to be welded is performed by adjusting the injection pressure of a specific expansion chamber (33) individually.

2. The welding equipment for coffee machine heating elements according to claim 1, characterized in that, A smart welding robotic arm (12) is provided on one side of the welding area of ​​the welding machine tool (11), and an adjustable heating tube alignment arm (13) is provided above the liquid injection expansion mechanism (2). The heating tube alignment arm (13) is used to clamp and adjust the coffee machine heating tube, and the liquid injection expansion mechanism (2) is used to clamp the connector of the coffee machine heating tube.

3. The welding equipment for coffee machine heating elements according to claim 1, characterized in that, The liquid expansion mechanism (2) also includes a rotating base (21) installed at the bottom of the welding area of ​​the welding machine tool (11). The air expansion base (22) is fixed on the rotating base (21). The interior of the rotating base (21) is set to be hollow, which is the equipment installation chamber. A closed door (24) is provided on the equipment installation chamber. The liquid supply system and pressure detection device of the liquid expansion bladder (32) are both installed in the equipment installation chamber.

4. The welding equipment for coffee machine heating elements according to claim 3, characterized in that, The four expansion bladder units of the liquid expansion bladder (32) are expansion low bladder one (321), expansion low bladder two (322), expansion top bladder one (323), and expansion top bladder two (324). Expansion low bladder one (321) and expansion low bladder two (322) are located at the corresponding positions of the coffee machine heating tube connector, and expansion top bladder one (323) and expansion top bladder two (324) are located at the corresponding positions of the heating tube body. There is a gap between the two groups of expansion low bladder one (321) and expansion low bladder two (322), and expansion top bladder one (323) and expansion top bladder two (324).

5. The welding equipment for coffee machine heating elements according to claim 1, characterized in that, The liquid inflation bladder (32) has a number of high-strength bands (38) arranged inside the twelve expansion chambers (33) of the four inflation bladder units. The high-strength bands (38) are not elastic. The two top ends of the high-strength bands (38) are fixed to the upper and lower walls of the expansion chambers (33) respectively, ensuring that the entire expansion chamber (33) can only expand laterally and cannot expand longitudinally.

6. The welding equipment for coffee machine heating elements according to claim 4, characterized in that, The outer walls of the four injection low bladder one (321), injection low bladder two (322), injection top bladder one (323) and injection top bladder two (324) are each inlaid with a number of longitudinal ceramic strips (39). The ceramic strips (39) are distributed equidistantly along the circumference, and the outer side of all the ceramic strips (39) is an arc-shaped surface.

7. The welding equipment for coffee machine heating elements according to claim 3, characterized in that, The liquid supply system of the liquid inflation bladder (32) includes a liquid storage box (28), the output end of which is fixedly connected to a water supply pump (29), the output end of which is fixedly connected to a distributor (201), the distributor (201) has twelve separate channels inside, and the output end of each channel is connected to a distributor hard pipe (37), each distributor hard pipe (37) corresponds to an expansion chamber (33) and is connected to the corresponding expansion chamber (33), and a micro control valve (203) is provided on each of the twelve channels inside the distributor (201).

8. The welding equipment for coffee machine heating elements according to claim 7, characterized in that, The pressure detection device for each expansion chamber (33) is a hydraulic sensor (202), and there are a total of twelve. The twelve hydraulic sensors (202) are respectively installed at the liquid outlet of the twelve channels inside the fluid separator (201) to detect the hydraulic status of the twelve expansion chambers (33).

9. The welding equipment for coffee machine heating elements according to claim 1, characterized in that, The extension column (31) is provided with a waist column (34) at the position of the welding seam between the coffee machine heating tube connector and the heating tube body. The waist column (34) is divided into four spaces, and each space is equipped with a probe (35). The bottom wall of the waist column (34) is provided with several colored gas ejection holes (36).

10. The welding equipment for a coffee machine heating element according to claim 9, characterized in that, The gas supply end of the colored gas outlet (36) is connected to an air pump (26), and the air inlet end of the air pump (26) is connected to a colored smoke storage box (25).

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