Automatic flat pressure sterile tube sealing machine

Abstract

The present invention discloses an automatic flat-press aseptic tube sealing machine, comprising a support seat, a machine head, a tube pressing platform, a driving mechanism, a fixed heating device and a dynamic heating device, wherein the machine head is fixedly connected to the support seat, the tube pressing platform is movably arranged between the support seat and the machine head through the driving mechanism, the fixed heating device and the dynamic heating device are respectively fixed on the machine head and the tube pressing platform, the fixed heating device is parallel and symmetrical to the dynamic heating device, and the driving mechanism drives the dynamic heating device to cooperate with the fixed heating device to seal the tube through the tube pressing platform. The present invention solves the technical problems of the existing tube sealing machine in that the tube body is easily offset when sealing the tube, the manual labor intensity is high, and the reliability of tube sealing is poor.

Description

Technical Field

[0001] The invention relates to the technical field of tube sealing, and in particular to an automatic flat-press aseptic tube sealing machine. Background Art

[0002] In biopharmaceuticals, vaccine production, and genetic engineering research and development, a tube sealing machine is required to aseptically seal plastic pipes. For example, the prior art with Chinese patent announcement number CN203046249U disclosed a tube sealing machine on December 26, 2012, which includes a support seat, a fixing clamp, a heating device, and a sensor, one end of the fixing clamp is rotatably connected to the support seat, the heating device is connected to the support seat, the sensor is arranged on the support seat, and the heating device and the sensor are both connected to a control terminal. The heating device and the sensor are both connected to a control terminal. The patent uses a heating device to heat the non-PVC weldable pipe, thereby melting the pipe, and then cooling and solidifying after deformation, so that the non-PVC weldable pipe is effectively sealed. However, it was found through actual use that the patent still has the following defects: 1. The fixing clamp is connected to the support seat by a hinge, and the pipe needs to be pressed manually, especially when the pipe body is large in size, it requires a lot of strength to be competent, resulting in a high labor intensity. 2. The tube body is a circular structure. Depending on the diameter of the tube body, an angle will be formed when the fixing clamp is pressed down from one end of the support seat. The angle will form a thrust to offset the center of the tube body. Since the heating device is fixed on the rotating arm, the position of the heating device is fixed. Therefore, when the tube body is placed before sealing, it is necessary to place it eccentrically according to experience to compensate for the eccentric displacement caused by the thrust of the angle. If the compensation is insufficient or excessive, it will cause poor sealing and accidents. However, there are problems such as easy mistakes when placing the tube body according to experience. 3. When sealing the tube, the tube body needs to be fixed and pressed into place (pressing into place means compressing the wall thickness of the tube body to 45% of the original wall thickness) before sealing the tube. This method of sealing the tube requires a pressure of about 470KG. Although there is a lever to increase the force, the labor intensity is still high, and the probability of operating errors is also high, resulting in low sealing efficiency. 4. The heating device uses a ceramic semiconductor heating element, which is easy to break. 5. When there is liquid in the tube body, the tube cannot be effectively sealed, that is, the tube cannot be sealed with liquid. 6. For pipes of different specifications, the gear position needs to be manually adjusted in real time according to the specifications of the pipe when sealing the pipe. However, manual gear adjustment is prone to forgetting to adjust the gear or adjusting the wrong gear, which ultimately leads to sealing errors. Summary of the invention

[0003] The purpose of the present invention is to overcome the above problems existing in the prior art and to provide an automatic flat-press aseptic tube sealing machine. The present invention solves the technical problems of the existing tube sealing machines such as easy displacement of the tube body during tube sealing, high labor intensity, and poor tube sealing reliability.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] An automatic flat-press aseptic tube sealing machine, characterized in that it includes a support seat, a machine head, a tube pressing platform, a driving mechanism, a fixed heating device and a dynamic heating device, the machine head is fixedly connected to the support seat, the tube pressing platform is movably arranged between the support seat and the machine head through the driving mechanism, the fixed heating device and the dynamic heating device are respectively fixed on the machine head and the tube pressing platform, the fixed heating device is parallel and symmetrical to the dynamic heating device, and the driving mechanism drives the dynamic heating device through the tube pressing platform to cooperate with the fixed heating device to seal the tube.

[0006] The machine head and the driving mechanism are respectively fixed above and below the support seat, and the driving mechanism drives the dynamic heating device to cooperate with the fixed heating device to seal the tube vertically upward through the tube pressing platform.

[0007] The machine head and the driving mechanism are respectively fixed on both sides of the support seat, and the driving mechanism drives the moving heating device to cooperate with the fixed heating device to seal the tube horizontally to the left or right through the tube pressing platform.

[0008] The tube sealing machine also includes a chassis, a controller and a display screen. The controller, the driving mechanism and the support seat are all fixed in the chassis. The controller is respectively connected to the driving mechanism, the display screen, the fixed heating device and the dynamic heating device. The display screen is fixed on the surface of the chassis.

[0009] The tube sealing machine also includes a pressure sensor and a stroke measuring device both connected to the controller. The pressure sensor is fixed between the fixed heating device and the machine head to measure the pressure during tube sealing, and the stroke measuring device is used to measure the stroke of the dynamic heating device.

[0010] The stroke measuring device includes a measuring circuit board, a movable ruler and a fixed ruler. The measuring circuit board is fixed on a support seat, the measuring circuit board is connected to a controller, the fixed ruler is fixedly connected to the measuring circuit board, the movable ruler is fixed on a pipe pressing platform, and the movable ruler and the fixed ruler cooperate to measure the stroke of the dynamic heating device.

[0011] The stroke measuring device also includes a touch member A, a touch member B, a limit switch A and a limit switch B. The limit switch A and the limit switch B are both fixed on the measuring circuit board. The touch member A and the touch member B are both fixed on the pipe pressing platform through an L-shaped structural member. The touch member A, the touch member B, the limit switch A and the limit switch B cooperate to limit the stroke of the pipe pressing platform.

[0012] The fixed heating device and the dynamic heating device both include a metal heating plate, a temperature sensor, a heating bed, a support plate, connecting leads and connectors. The metal heating plate is fixed on the support plate through the heating bed, the temperature sensor is fixed between the metal heating plate and the heating bed, the connecting leads are fixed between the heating bed and the support plate, one end of the connecting leads is connected to the controller, and the other end is respectively connected to the metal heating plate and the temperature sensor through the connector; the fixed heating device is fixed on the machine head through the support plate, and the dynamic heating device is fixed on the pipe pressing table through the support plate.

[0013] The connecting piece includes an electrode pin and a tower spring. The electrode pin is arranged in the heating bed and corresponds to the electrode of the metal heating plate and the temperature sensor respectively. The tower spring is arranged in the support plate and connected to the electrode pin. The connecting lead is connected to the metal heating plate and the temperature sensor through the electrode pin.

[0014] The metal heating plate comprises a polytetrafluoroethylene anti-sticking layer, a metal plate, a thick film circuit and an insulating layer which are fixed in sequence, and the temperature sensor is fixed in the middle of the insulating layer.

[0015] The heating surface of the metal plate is a plane.

[0016] The heating surface of the metal plate includes a protruding plane and inclined surfaces symmetrically arranged on both sides of the protruding plane.

[0017] The two ends of the heating bed are provided with air outlets and air inlets communicated with an air pump fixed in the chassis. The heating bed is provided with a groove for fixing the metal heating plate. The groove is provided with ventilation slots respectively communicated with the air inlet and the air outlet.

[0018] The driving mechanism includes a motor, a reducer and a screw. A screw sleeve is arranged in the pipe pressing platform. The motor is connected to the reducer. One end of the screw is connected to the reducer and the other end is located in the screw sleeve. The reducer controls the movement of the pipe pressing platform through the cooperation between the screw and the screw sleeve.

[0019] A guide column extending into the pipe pressing platform is fixedly arranged on the support seat, and a linear bearing matched with the guide column is fixedly arranged inside the pipe pressing platform.

[0020] The advantages of adopting the present invention are:

[0021] 1. The tube sealing machine of the present invention comprises a support seat, a machine head, a tube pressing platform, a driving mechanism, a fixed heating device and a dynamic heating device. Since the fixed heating device and the dynamic heating device are respectively fixed on the machine head and the tube pressing platform, and the fixed heating device and the dynamic heating device are parallel, during the tube sealing process, the fixed heating device and the dynamic heating device can press and fix the tube body in parallel, so that the tube body is stably clamped between the fixed heating device and the dynamic heating device without deviation, thereby improving the reliability of tube sealing. Since the dynamic heating device is controlled by the driving mechanism, it not only realizes the automatic tube sealing of electric pressure tube, avoids manual pressure tube, but also reduces the labor intensity, making tube sealing easier. More importantly, it effectively eliminates the possibility of mistakes in manual pressure tube, greatly improving reliability. In addition, since the tube body is pressed by the fixed heating device and the dynamic heating device which are parallel in time, the tube body can be melted during the pressing process, that is, the tube body can be melted while pressing the tube. The melted tube body is in a molten state, so a relatively small force (about tens of kilograms of pressure) can be used to move the lower heating assembly to the set tube sealing position, which not only improves the reliability of tube sealing, but also reduces energy consumption.

[0022] 2. The driving mechanism of the present invention drives the dynamic heating device and the fixed heating device to cooperate with the tube sealing structure through the tube pressing platform, so that the tube sealing machine becomes a vertical structure, which has the advantages of easy operation and meeting the needs of different users.

[0023] 3. The driving mechanism of the present invention drives the dynamic heating device to the left or right horizontally through the tube pressing platform to cooperate with the fixed heating device to seal the tube, so that the tube sealing machine becomes a horizontal structure, which has the advantages of easy operation and meeting the needs of different users.

[0024] 4. The present invention can protect the components of the tube sealing machine through the chassis, which is not only conducive to preventing the tube sealing machine from being easily damaged, but also makes the tube sealing machine more beautiful. The overall control of the controller can realize the automatic tube sealing of the tube sealing machine, and the tube sealing efficiency is higher.

[0025] 5. The present invention also includes a pressure sensor and a stroke measuring device, both of which are connected to the controller. The pressure sensor can measure the pressure during tube sealing, and the stroke measuring device can measure the stroke of the dynamic heating device. With the cooperation of the pressure sensor and the stroke measuring device, the controller can calculate the specifications of the tube body according to the obtained stroke value and pressure value, thereby calling the tube sealing scheme of the corresponding tube body specification pre-stored in the controller to seal the tube. In other words, through the cooperation of the controller, the pressure sensor and the stroke measuring device, the specifications and models of the tube body can be intelligently identified, and the tube sealing scheme of the corresponding specifications can be automatically matched, specifically covering a full range of tube bodies of various commonly used specifications from 6.4mm to 20mm in diameter. Automatic tube sealing of tubes of different specifications is achieved, and one machine can be used for multiple purposes, expanding the scope of use. More importantly, it effectively eliminates manual shifting errors and mistakes caused by forgetting to shift gears, greatly improving reliability.

[0026] 6. The present invention adopts a measuring circuit board, a movable ruler and a fixed ruler as a stroke measuring device, which has the advantages of simple structure, low cost and accurate measurement.

[0027] 7. The present invention can limit the stroke of the pipe pressing platform through the cooperation of the touch member A, the touch member B, the limit switch A and the limit switch B, thereby avoiding the problem of equipment damage caused by exceeding the stroke.

[0028] 8. The present invention adopts a metal heating plate to replace the existing ceramic heating plate to heat-melt the tube body, which has the advantages of not easy to damage, good thermal conductivity, and long service life. The heating temperature can be controlled in real time through the temperature sensor to ensure the best melting effect of the tube body. The connecting piece ensures a stable and effective connection between the connecting lead and the metal heating plate.

[0029] 9. The connecting piece of the present invention comprises an electrode pin and a tower spring, and this structure is conducive to the stable connection between the electrode pin, the metal heating plate and the temperature sensor.

[0030] 10. The metal heating plate of the present invention comprises a polytetrafluoroethylene anti-sticking layer, a metal plate, a thick film circuit and an insulating layer fixed in sequence, wherein the polytetrafluoroethylene anti-sticking layer can prevent the hot-melted tube from being adhered to the metal heating plate, the metal plate is conducive to improving the service life and thermal conductivity of the metal heating plate, the thick film circuit can make the metal plate heat up quickly, and the insulating layer improves the safety of the metal heating plate. At the same time, the entire metal heating plate also has the advantages of compact structure and small size.

[0031] 11. The present invention sets the heating surface of the metal plate as a plane, which is conducive to the rapid heat sealing of the liquid-free tube body.

[0032] 12. The heating surface of the metal plate in the present invention includes a protruding plane and inclined planes symmetrically arranged on both sides of the protruding plane. This structure enables the tube sealing machine to drain and seal the tube body with liquid, further improving the application range of the tube sealing machine.

[0033] 13. The present invention fixes the metal heating plate in the groove of the heating bed, thereby improving the stability of the metal heating plate. Through the cooperation of the air pump, the air inlet, the air outlet and the ventilation slot, the melting part of the tube body can be quickly cooled at the hot-melt sealing tube, thereby improving the sealing efficiency.

[0034] 14. The coordination of the motor, reducer, screw, guide column and linear bearing in the present invention enables the lower heating assembly fixed on the tube pressing platform to move only in a linear direction, thereby ensuring parallel pressing of the tube body and improving the reliability of tube sealing.

[0035] 15. The volume of the present invention is about 180*130*170mm, and the weight is about 3.5gk. It has the characteristics of small volume and light weight. When in use, it can be directly taken to the position where the distal tube needs to be sealed for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the main structure of a vertical tube sealing machine;

[0037] Figure 2 for Figure 1 Schematic diagram of the left view structure;

[0038] Figure 3 for Figure 1 A right view structural diagram of ;

[0039] Figure 4 for Figure 1 Rear view of the overall structure diagram;

[0040] Figure 5 It is a structural schematic diagram of the heating bed in the present invention;

[0041] Figure 6 It is a schematic diagram of the structure of the metal heating plate in the present invention;

[0042] Figure 7 It is a structural schematic diagram of the heating device when the heating surface of the metal plate in the present invention is a plane;

[0043] Figure 8 It is a structural schematic diagram of the heating device when the heating surface of the metal plate in the present invention includes a protruding plane;

[0044] Fig. 9 It is a schematic diagram of the structure of the liquid-carrying tube body when the tube is pressed during the tube sealing process in the present invention;

[0045] Fig.10It is a schematic diagram of the structure of the liquid-carrying tube body in the present invention when the tube is pressed into place during the tube sealing process;

[0046] Fig.11 It is a schematic diagram of the main structure of a horizontal tube sealing machine;

[0047] The markings in the figure are: 1. Support seat, 2. Machine head, 3. Pipe pressing table, 4. Driving mechanism, 5. Fixed heating device, 6. Liquid, 7. Dynamic heating device, 8. Chassis, 9. Controller, 10. Display screen, 11. Pressure sensor, 12. Stroke measuring device, 13. Measuring circuit board, 14. Dynamic ruler, 15. Fixed ruler, 16. Touch piece A, 17. Touch piece B, 18. Limit switch A, 19. Limit switch B, 20. Metal heating plate, 21. Temperature Degree sensor, 22. Heating bed, 23. Support plate, 24. Connecting lead, 25. Electrode ejector pin, 26. Tower spring, 27. Polytetrafluoroethylene anti-sticking layer, 28. Metal plate, 29. Thick film circuit, 30. Insulating layer, 31. Air inlet, 32. Air outlet, 33. Ventilation slot, 34. Air pump, 35. Motor, 36. Reducer, 37. Screw, 38. Screw sleeve, 39. Guide column, 40. Linear bearing, 41. Air inlet pipe, 42. Power module. DETAILED DESCRIPTION

[0048] Example 1

[0049] This embodiment provides an automatic flat-press aseptic tube sealing machine, which is a vertical structure. Figure 1-4 As shown, it includes a support seat 1, a machine head 2, a tube pressing platform 3, a driving mechanism 4, a power module 42, a fixed heating device 5 and a dynamic heating device 7. The machine head 2 is fixedly connected to the support seat 1, and the tube pressing platform 3 is movably arranged between the support seat 1 and the machine head 2 through the driving mechanism 4. The movement of the tube pressing platform 3 is controlled by the driving mechanism 4. The fixed heating device 5 and the dynamic heating device 7 are respectively fixed on the machine head 2 and the tube pressing platform 3. The fixed heating device 5 is parallel and symmetrical to the dynamic heating device 7. The driving mechanism 4 drives the dynamic heating device 7 to cooperate with the fixed heating device 5 to seal the tube through the tube pressing platform 3. The power module 42 supplies power to the driving mechanism 4, the fixed heating device 5 and the dynamic heating device 7 respectively. Among them, the machine head 2 is fixed above the support seat 1, and the driving mechanism 4 is fixed below the support seat 1; the machine head 2 is preferably an L-shaped structure, one end of which is fixed on the support seat 1, and the other end is fixedly connected to the fixed heating device 5. The driving mechanism 4 drives the dynamic heating device 7 to cooperate with the fixed heating device 5 to seal the tube through the tube pressing platform 3.

[0050] In this embodiment, the tube sealing machine also includes a chassis 8, a controller 9 and a display screen 10. The controller 9, the power module 42, the drive mechanism 4 and the support base 1 are all fixed in the chassis 8. The display screen 10 is fixed on the inner surface of the chassis 8. The chassis 8 is provided with a avoidance hole for the tube pressing platform 3 to pass through. The controller 9 is respectively connected to the drive mechanism 4, the power module 42, the display screen 10, the fixed heating device 5 and the dynamic heating device 7. The controller 9 is used to control the drive mechanism 4, the fixed heating device 5 and the dynamic heating device 7. Specifically, it can control the fixed heating device 5 and the dynamic heating device 7 to work while controlling the tube pressing platform 3 to move upward.

[0051] In this embodiment, the driving mechanism 4 includes a motor 35, a reducer 36 and a screw 37. A screw sleeve 38 is provided in the tube pressing platform 3. The power output shaft of the motor 35 is connected to the power input shaft of the reducer 36. One end of the screw 37 is connected to the power output shaft of the reducer 36, and the other end extends into the screw sleeve 38. The reducer 36 controls the lifting and lowering of the tube pressing platform 3 through the screw and the screw sleeve 38. Further, four guide columns 39 are fixedly provided on the support seat 1. A guide hole matching the guide column 39 is fixedly provided in the tube pressing platform 3. A linear bearing 40 is provided in the guide hole. The tube pressing platform 3 is sleeved on the guide column 39 through the guide hole and the linear bearing 40, so that the tube pressing platform 3 can only be lifted and lowered vertically under the action of the driving mechanism 4.

[0052] In this embodiment, the temperature signal of the controller 9 uses a 24-bit high-precision AD converter and a PID algorithm to ensure accurate temperature control, and the controller uses DSP to realize motor control and logic control. The controller 9 controls the start, stop and forward and reverse rotation of the motor 35 through a DC motor drive circuit, and controls the fixed heating device 5 and the dynamic heating device 7 through power devices. The fixed heating device 5 and the dynamic heating device 7 can use existing conventional ceramic heating elements.

[0053] The pipe sealing process of this embodiment is as follows:

[0054] First, place the tube body on the dynamic heating device 7, then click the start button. After receiving the start command, the controller 9 controls the motor 35 to start. The motor 35 drives the dynamic heating device 7 to move vertically upward through the reducer 36. When the dynamic heating device 7 moves to the point where the tube body contacts the fixed heating device 5, the controller 9 controls the fixed heating device 5 and the dynamic heating device 7 to heat simultaneously. Then, as the dynamic heating device 7 continues to move upward, the tube body is symmetrically flattened from the upper and lower parts by the parallel fixed heating devices 5 and the dynamic heating devices 7, respectively. During the flattening process, since the fixed heating device 5 and the dynamic heating device 7 continue to heat and melt the tube body, the driving mechanism 4 can use a small force to raise the fixed heating device 5 to a position where the tube body can be completely melted to achieve tube sealing. After the tube body between the fixed heating device 5 and the dynamic heating device 7 is completely melted, stop heating and cool. When it cools to the set temperature, the dynamic heating device 7 is reset to complete the automatic tube sealing of the tube body.

[0055] Example 2

[0056] This embodiment provides an automatic flat-press aseptic tube sealing machine, which is a vertical structure. Figure 1-4 As shown, it includes a support seat 1, a machine head 2, a tube pressing platform 3, a driving mechanism 4, a power module 42, a fixed heating device 5 and a dynamic heating device 7. The machine head 2 is fixedly connected to the support seat 1, and the tube pressing platform 3 is movably arranged between the support seat 1 and the machine head 2 through the driving mechanism 4. The movement of the tube pressing platform 3 is controlled by the driving mechanism 4. The fixed heating device 5 and the dynamic heating device 7 are respectively fixed on the machine head 2 and the tube pressing platform 3. The fixed heating device 5 is parallel and symmetrical to the dynamic heating device 7. The driving mechanism 4 drives the dynamic heating device 7 to cooperate with the fixed heating device 5 to seal the tube through the tube pressing platform 3. The power module 42 supplies power to the driving mechanism 4, the fixed heating device 5 and the dynamic heating device 7 respectively. Among them, the machine head 2 is fixed above the support seat 1, and the driving mechanism 4 is fixed below the support seat 1; the machine head 2 is preferably an L-shaped structure, one end of which is fixed on the support seat 1, and the other end is fixedly connected to the fixed heating device 5. The driving mechanism 4 drives the dynamic heating device 7 to cooperate with the fixed heating device 5 to seal the tube through the tube pressing platform 3.

[0057] In this embodiment, the tube sealing machine also includes a chassis 8, a controller 9 and a display screen 10. The controller 9, the power module 42, the drive mechanism 4 and the support base 1 are all fixed in the chassis 8. The display screen 10 is fixed on the inner surface of the chassis 8. The chassis 8 is provided with a avoidance hole for the tube pressing platform 3 to pass through. The controller 9 is respectively connected to the drive mechanism 4, the power module 42, the display screen 10, the fixed heating device 5 and the dynamic heating device 7. The controller 9 is used to control the drive mechanism 4, the fixed heating device 5 and the dynamic heating device 7. Specifically, it can control the fixed heating device 5 and the dynamic heating device 7 to work while controlling the tube pressing platform 3 to move upward.

[0058] In this embodiment, the driving mechanism 4 includes a motor 35, a reducer 36 and a screw 37. A screw sleeve 38 is provided in the tube pressing platform 3. The power output shaft of the motor 35 is connected to the power input shaft of the reducer 36. One end of the screw 37 is connected to the power output shaft of the reducer 36, and the other end extends into the screw sleeve 38. The reducer 36 controls the lifting and lowering of the tube pressing platform 3 through the screw and the screw sleeve 38. Further, four guide columns 39 are fixedly provided on the support seat 1. A guide hole matching the guide column 39 is fixedly provided in the tube pressing platform 3. A linear bearing 40 is provided in the guide hole. The tube pressing platform 3 is sleeved on the guide column 39 through the guide hole and the linear bearing 40, so that the tube pressing platform 3 can only be lifted and lowered vertically under the action of the driving mechanism 4.

[0059] In this embodiment, the tube sealing machine also includes a pressure sensor 11 and a stroke measuring device 12, both of which are connected to the controller 9. The pressure sensor 11 is fixed between the fixed heating device 5 and the machine head 2 to measure the pressure during tube sealing, and transmits the real-time measured pressure value to the controller 9 and the display screen 10. The stroke measuring device 12 is arranged on one side of the support seat 1 to measure the stroke of the dynamic heating device 7, and transmits the real-time measured stroke value to the controller 9 and the display screen 10. Among them, through the cooperation of the controller 9, the pressure sensor 11 and the stroke measurement, the automatic identification of the tube specifications can be realized, thereby realizing automatic tube sealing for tubes of different specifications. In other words, after the tube body is placed on the dynamic heating device 7, the controller 9 can automatically identify the tube diameter and wall thickness of the tube body according to the pressure value and the stroke value, thereby calling the corresponding tube sealing scheme, and realizing the automatic and intelligent tube sealing of the tube body. Specifically, it is necessary to repeatedly perform sealing tests on pipes of various specifications in advance to obtain the pressure, stroke and speed (the speed is obtained by the stroke value and time) of each pipe when sealing, and then summarize the typical data, and then make a normal distribution curve of the data of each specification of the pipe, and then define the edge and input it into the controller 9 as a template. In this way, when actually sealing the pipe, it is only necessary to compare the actually measured pressure value, stroke value, and speed value with the template in the controller 9 to determine the correct pipeline specification model, so as to call the sealing plan of the corresponding specification model. The pressure value, stroke value, speed value and pipe body specification involved in the process can be displayed on the display screen 10.

[0060] Furthermore, taking a tube with a wall thickness of 3.2 mm as an example, the tube with a wall thickness of 3.2 mm is placed on the dynamic heating device 7, the button is pressed, and the tube pressing platform 3 rises. Since the tube is soft, the measured value of the pressure sensor 11 is small during the flattening process. When the flattening gap becomes smaller to 6.4 mm (after the two tube walls are compacted), the measured value of the pressure sensor 11 becomes larger and the rising speed becomes slower. After the controller 9 receives the above information (including stroke data), it automatically determines the specifications and models of the pressed tube according to the scheme pre-stored in the template, and then calls the corresponding tube sealing scheme to automatically seal the tube (no manual shifting is required), thereby achieving effective tube sealing of tubes of various specifications and models.

[0061] In this embodiment, the stroke measuring device 12 includes a measuring circuit board 13, a moving ruler 14 and a fixed ruler 15. The measuring circuit board 13 is fixed on the support seat 1, the measuring circuit board 13 is connected to the controller 9, the fixed ruler 15 is fixedly connected to the measuring circuit board 13, and the moving ruler 14 is fixed on the tube pressing platform 3. When the driving mechanism 4 drives the dynamic heating device 7 to move vertically upward through the tube pressing platform 3, the moving ruler 14 and the fixed ruler 15 cooperate to measure the stroke of the dynamic heating device 7, and transmit the measured stroke value to the controller 9 in real time through the measuring circuit board 13. The stroke measuring device 12 also includes a touch member A16, a touch member B17, a limit switch A18 and a limit switch B19. The limit switch A18 and the limit switch B19 are both fixed on the measuring circuit board 13. The touch member A16 and the touch member B17 are both fixed on the tube pressing platform 3 through an L-shaped structural member. The touch member A16 cooperates with the limit switch B19 to limit the lower stroke of the tube pressing platform 3, and the touch member B17 cooperates with the limit switch A18 to limit the upper stroke of the tube pressing platform 3. The touch member A16, the touch member B17, the limit switch A18 and the limit switch B19 cooperate to limit the stroke of the tube pressing platform 3, and the driving mechanism 4 automatically stops when the tube pressing platform 3 exceeds the set position.

[0062] In this embodiment, the measuring circuit board 13, the movable ruler 14 and the fixed ruler 15 can all be conventional products. For example, the movable ruler 14 can be customized according to needs, and the fixed ruler 15 can be purchased as a finished TM003 chip microcomputer. The fixed heating device 5 and the movable heating device 7 can use conventional ceramic heating elements.

[0063] The pipe sealing process of this embodiment is as follows:

[0064] First, place the tube body on the dynamic heating device 7, then click the start button. After receiving the start command, the controller 9 controls the motor 35 to start. The motor 35 drives the dynamic heating device 7 to move vertically upward through the reducer 36. At the same time, the pressure sensor 11 starts to test the pressure value, and the stroke measuring device 12 starts to measure the stroke value of the dynamic heating device 7. When the pressure value reaches the set value in the template, and the stroke value also reaches the set value in the template, the controller 9 determines the specifications of the tube body according to the template, calls the pre-stored sealing scheme and controls the fixed heating device 5 and the dynamic heating device 7 to heat at the same time. Then, as the dynamic heating device 7 continues to move upward, the tube body is symmetrically flattened from the upper and lower parts by the parallel fixed heating device 5 and the dynamic heating device 7. In the flattening process, since the fixed heating device 5 and the dynamic heating device 7 continue to heat and melt the tube body, the driving mechanism 4 can use a small force to raise the fixed heating device 5 to the position where the corresponding scheme of the tube body of this specification can be completely melted to achieve sealing. After the tube body between the pending heating device 5 and the dynamic heating device 7 is completely melted, the heating is stopped and cooled. When the cooling reaches the set temperature, the dynamic heating device 7 is reset to complete the automatic and intelligent sealing of the tube body.

[0065] Example 3

[0066] This embodiment provides an automatic flat-press aseptic tube sealing machine, which is a vertical structure. Figure 1-4 As shown, it includes a support seat 1, a machine head 2, a tube pressing platform 3, a driving mechanism 4, a power module 42, a fixed heating device 5 and a dynamic heating device 7. The machine head 2 is fixedly connected to the support seat 1, and the tube pressing platform 3 is movably arranged between the support seat 1 and the machine head 2 through the driving mechanism 4. The movement of the tube pressing platform 3 is controlled by the driving mechanism 4. The fixed heating device 5 and the dynamic heating device 7 are respectively fixed on the machine head 2 and the tube pressing platform 3. The fixed heating device 5 is parallel and symmetrical to the dynamic heating device 7. The driving mechanism 4 drives the dynamic heating device 7 to cooperate with the fixed heating device 5 to seal the tube through the tube pressing platform 3. The power module 42 supplies power to the driving mechanism 4, the fixed heating device 5 and the dynamic heating device 7 respectively. Among them, the machine head 2 is fixed above the support seat 1, and the driving mechanism 4 is fixed below the support seat 1; the machine head 2 is preferably an L-shaped structure, one end of which is fixed on the support seat 1, and the other end is fixedly connected to the fixed heating device 5. The driving mechanism 4 drives the dynamic heating device 7 to cooperate with the fixed heating device 5 to seal the tube through the tube pressing platform 3.

[0067] In this embodiment, the tube sealing machine also includes a chassis 8, a controller 9 and a display screen 10. The controller 9, the power module 42, the drive mechanism 4 and the support base 1 are all fixed in the chassis 8. The display screen 10 is fixed on the inner surface of the chassis 8. The chassis 8 is provided with a avoidance hole for the tube pressing platform 3 to pass through. The controller 9 is respectively connected to the drive mechanism 4, the power module 42, the display screen 10, the fixed heating device 5 and the dynamic heating device 7. The controller 9 is used to control the drive mechanism 4, the fixed heating device 5 and the dynamic heating device 7. Specifically, it can control the fixed heating device 5 and the dynamic heating device 7 to work while controlling the tube pressing platform 3 to move upward.

[0068] In this embodiment, the driving mechanism 4 includes a motor 35, a reducer 36 and a screw 37. A screw sleeve 38 is provided in the tube pressing platform 3. The power output shaft of the motor 35 is connected to the power input shaft of the reducer 36. One end of the screw 37 is connected to the power output shaft of the reducer 36, and the other end extends into the screw sleeve 38. The reducer 36 controls the lifting and lowering of the tube pressing platform 3 through the screw and the screw sleeve 38. Further, four guide columns 39 are fixedly provided on the support seat 1. A guide hole matching the guide column 39 is fixedly provided in the tube pressing platform 3. A linear bearing 40 is provided in the guide hole. The tube pressing platform 3 is sleeved on the guide column 39 through the guide hole and the linear bearing 40, so that the tube pressing platform 3 can only be lifted and lowered vertically under the action of the driving mechanism 4.

[0069] In this embodiment, the tube sealing machine further includes a pressure sensor 11 and a stroke measuring device 12 both connected to the controller 9. The pressure sensor 11 is fixed between the fixed heating device 5 and the machine head 2 to measure the pressure during tube sealing, and transmits the real-time measured pressure value to the controller 9 and the display screen 10. The stroke measuring device 12 is arranged on one side of the support seat 1 to measure the stroke of the dynamic heating device 7, and transmits the real-time measured stroke value to the controller 9 and the display screen 10. Among them, through the cooperation of the controller 9, the pressure sensor 11 and the stroke measurement, the automatic identification of the tube body specifications can be realized, thereby realizing automatic and intelligent tube sealing for tubes of different specifications.

[0070] In this embodiment, the stroke measuring device 12 includes a measuring circuit board 13, a moving ruler 14 and a fixed ruler 15. The measuring circuit board 13 is fixed on the support seat 1, the measuring circuit board 13 is connected to the controller 9, the fixed ruler 15 is fixedly connected to the measuring circuit board 13, and the moving ruler 14 is fixed on the tube pressing platform 3. When the driving mechanism 4 drives the dynamic heating device 7 to move vertically upward through the tube pressing platform 3, the moving ruler 14 and the fixed ruler 15 cooperate to measure the stroke of the dynamic heating device 7, and transmit the measured stroke value to the controller 9 in real time through the measuring circuit board 13. The stroke measuring device 12 also includes a touch member A16, a touch member B17, a limit switch A18 and a limit switch B19, both of which are fixed on the measuring circuit board 13, and both of which are fixed on the tube pressing platform 3 through an L-shaped structural member, and the touch member A16 cooperates with the limit switch B19 to limit the lower stroke of the tube pressing platform 3, and the touch member B17 cooperates with the limit switch A18 to limit the upper stroke of the tube pressing platform 3. The touch member A16, the touch member B17, the limit switch A18 and the limit switch B19 cooperate to limit the stroke of the tube pressing platform 3, and the driving mechanism 4 automatically stops when the tube pressing platform 3 exceeds the set position.

[0071] In this embodiment, Figure 5-8As shown, the fixed heating device 5 and the dynamic heating device 7 both include a metal heating plate 20, a temperature sensor 21, a heating bed 22, a support plate 23, a connecting lead 24 and a connector. The metal heating plate 20 is fixed on the support plate 23 through the heating bed 22, the temperature sensor 21 is fixed between the metal heating plate 20 and the heating bed 22, the connecting lead 24 is fixed between the heating bed 22 and the support plate 23, one end of the connecting lead 24 is connected to the controller 9, and the other end is connected to the metal heating plate 20 and the temperature sensor 21 through the connector. Among them, the temperature sensor 21 can detect the heating temperature of the metal heating plate 20 in real time, and notify the controller 9 when the heating temperature of the metal heating plate 20 reaches the set value, and the controller 9 controls the metal heating plate 20 to stop heating. The fixed heating device 5 is fixed on the machine head 2 through the support plate 23, and the dynamic heating device 7 is fixed on the tube pressing table 3 through the support plate 23. The heating bed 22 is provided with an air outlet 32 ​​and an air inlet 31 at both ends. The air inlet 31 is connected to an air pump 34 fixed in the chassis 8 through an air inlet pipe 41. The air pump 34 is connected to a controller 9, and the controller 9 controls the switch of the air pump 34. The heating bed 22 is provided with a groove for fixing the metal heating plate 20. The groove is provided with ventilation slots 33 respectively connected to the air inlet 31 and the air outlet 32. The connecting parts include an electrode ejector 25 and a tower spring 26. The electrode ejector 25 is provided in the heating bed 22, and the electrode ejector 25 corresponds to the electrode of the metal heating plate 20 and the electrode of the temperature sensor 21 respectively. The tower spring 26 is provided in the support plate 23 and connected to the electrode ejector 25; the connecting lead 24 is connected to the metal heating plate 20 and the temperature sensor 21 through the electrode ejector 25. The metal heating plate 20 includes a polytetrafluoroethylene anti-sticking layer 27, a metal plate 28, a thick film circuit 29 and an insulating layer 30 fixed in sequence. The metal plate 28 can be made of a high-temperature resistant and non-oxidizable metal material, such as a stainless steel plate, a tungsten steel plate, etc. The temperature sensor 21 is fixed in the middle of the insulating layer 30. The metal plate 28 preferably has the following two structures:

[0072] The first type is that the heating surface of the metal plate 28 is a plane. The metal plate 28 with this structure is mainly used to seal a tube body without liquid 6 inside.

[0073] The second type is that the heating surface of the metal plate 28 includes a protruding plane and inclined surfaces symmetrically arranged on both sides of the protruding plane. The metal plate 28 with this structure is mainly used to seal the tube body with liquid 6 inside. Figure 9-10 As shown, when sealing the tube, the protruding plane can make the corresponding part of the tube body contact with the tube wall before the inclined surface, thereby squeezing the liquid 6 in the tube body corresponding to the entire metal heating plate 20 to both ends, ensuring the reliability of the tube sealing.

[0074] The metal heating plate 20 used in this embodiment can withstand greater pressure and heat and melt the tube body while pressing and consolidating the tube body, which not only increases the service life of the metal heating plate 20, but also improves the stability and reliability of the tube sealing. After the tube body is completely melted, the air pump 34 can automatically send air to the ventilation slot 33 to quickly cool the tube body sealing part, which not only shortens the tube sealing time, but also improves the tube sealing efficiency. The entire tube sealing process can be completed by one-click through the start button of the controller 9, which is more intelligent.

[0075] Example 4

[0076] This embodiment provides an automatic flat-press aseptic tube sealing machine, which is a horizontal structure. The horizontal tube sealing machine is formed by flipping the vertical tube sealing machine described in any of the embodiments 1-3 by 90 degrees. The difference between the structure and the vertical tube sealing machine described in the embodiments 1-3 is only that the shape of the chassis 8 is different. Fig.11 Specifically, the structure of the chassis 8 is as follows: a groove is provided on the chassis 8, an inclined surface is provided on one side of the groove, the fixed heating device 5 is fixed on one side of the groove through the machine head 2, a clearance hole for the pressure tube platform 3 to pass through is provided on the other side of the groove, and the display screen 10 is provided on the inclined surface.

[0077] In this embodiment, the machine head 2 and the driving mechanism 4 are respectively fixed on both sides of the support seat 1, and the driving mechanism 4 drives the dynamic heating device 7 to cooperate with the fixed heating device 5 to seal the tube horizontally to the left or right through the tube pressing platform 3. However, since the fixed heating device 5 and the dynamic heating device 7 are both arranged vertically, the tube body cannot be placed on the dynamic heating device 7 like a vertical tube sealing machine, so in actual use, it is necessary to set support members for supporting the tube body at both ends of the groove. In this way, when actually sealing the tube, the tube body can be placed on the support member first, and then the dynamic heating device 7 pushes the tube body to move on the support member until the tube body contacts the fixed heating device 5.

[0078] In this embodiment, the touch member A16, the touch member B17, the limit switch A18 and the limit switch B19 in the stroke measuring device are used together to limit the left / right stroke of the tube pressing platform 3, and the driving mechanism 4 automatically stops when the tube pressing platform 3 exceeds the set position.

[0079] Example 5

[0080] This embodiment conducted the following tests on the existing tube sealing machine cited in the background art and the tube sealing machine of the present invention:

[0081] Test 1:

[0082] The sealing test was conducted on 10 tubes with wall thicknesses of 1.6mm, 2.4mm and 3.2mm, and the test results were as follows:

[0083] Existing tube sealing machines: It takes 26 minutes to seal 10 tubes with a wall thickness of 1.6 mm (sealing time plus manual tube pressing time). It takes 33 minutes to seal 10 tubes with a wall thickness of 2.4 mm (sealing time plus manual tube pressing time). It takes 44 minutes to seal 10 tubes with a wall thickness of 3.2 mm (sealing time plus manual tube pressing time).

[0084] The tube sealing machine of the present invention takes 21 minutes (tube sealing time, no manual tube pressing time) to seal 10 tubes with a wall thickness of 1.6 mm. It takes 28 minutes (tube sealing time, no manual tube pressing time) to seal 10 tubes with a wall thickness of 2.4 mm. It takes 37 minutes (tube sealing time, no manual tube pressing time) to seal 10 tubes with a wall thickness of 3.2 mm.

[0085] This proves that the tube sealing efficiency of the tube sealing machine of the present invention is better than that of the existing tube sealing machine, and can save more time.

[0086] Test 2:

[0087] Ten tubes with a wall thickness of 1.6 mm, ten tubes with a wall thickness of 2.4 mm, and ten tubes with a wall thickness of 3.2 mm were mixed together and rotated for sealing tests. The test results are as follows:

[0088] Existing tube sealing machine: It takes 108 minutes to complete 30 tubes with different wall thicknesses (tube sealing time, manual tube pressing time, gear shifting time)

[0089] The tube sealing machine of the present invention: It only takes 86 minutes to complete 30 tubes with different wall thicknesses (tube sealing time, no manual tube pressing time, no gear shifting time)

[0090] This proves that the tube sealing efficiency of the tube sealing machine of the present invention is much higher than that of the existing tube sealing machine, especially when the wall thickness specifications are different, the efficiency is higher.

[0091] Test 3:

[0092] The applicant conducted a wet heat sterilization test on the tube body after the successful sealing (the test conditions of the general wet heat sterilization test are to test at a temperature of 142 degrees for 20 minutes), and tested the sealed tube body at a temperature of 146-148 degrees for 30 minutes. The test results are as follows:

[0093] Existing tube sealing machines: The heat sealing area often shrinks.

[0094] The tube sealing machine of the present invention has the following advantages: the tube body is not deformed at all, and the heat-sealed area does not shrink, and the tube sealing strength is higher. This is because the tube is still pressed after heating, so that the heat-sealed surface obtains a greater pressure at high temperature than the existing tube sealing machine, and the pressure is maintained for a longer time.

[0095] This proves that the tube sealing effect of the tube sealing machine of the present invention is far superior to that of the existing tube sealing machine. The tube sealing machine of the present invention is currently being produced and is ready for sale on the market, and its model is FGJ-ST969.

Claims

1. An automatic flat-pressure aseptic tube sealing machine, characterized in that: The invention comprises a support seat (1), a machine head (2), a tube pressing platform (3), a driving mechanism (4), a fixed heating device (5) and a dynamic heating device (7), wherein the machine head (2) is fixedly connected to the support seat (1), the tube pressing platform (3) is movably arranged between the support seat (1) and the machine head (2) through the driving mechanism (4), the fixed heating device (5) and the dynamic heating device (7) are respectively fixed on the machine head (2) and the tube pressing platform (3), the fixed heating device (5) and the dynamic heating device (7) are parallel and symmetrical, and the driving mechanism (4) drives the dynamic heating device (7) through the tube pressing platform (3) to cooperate with the fixed heating device (5) to seal the tube; The tube sealing machine further comprises a chassis (8), a controller (9) and a display screen (10); the controller (9), the driving mechanism (4) and the support base (1) are all fixed in the chassis (8); the controller (9) is respectively connected to the driving mechanism (4), the display screen (10), the fixed heating device (5) and the dynamic heating device (7); and the display screen (10) is fixed on the surface of the chassis (8); The tube sealing machine further comprises a pressure sensor (11) and a stroke measuring device (12) both connected to the controller (9); the pressure sensor (11) is fixed between the fixed heating device (5) and the machine head (2) and is used to measure the pressure during tube sealing, and transmits the real-time measured pressure value to the controller (9) and the display screen (10); the stroke measuring device (12) is used to measure the stroke of the dynamic heating device (7), and transmits the real-time measured stroke value to the controller (9) and the display screen (10); through the cooperation of the controller (9), the pressure sensor (11) and the stroke measurement, the outer diameter and wall thickness of the tube body can be automatically identified, and automatic tube sealing can be achieved for tubes of different specifications; The stroke measuring device (12) comprises a measuring circuit board (13), a moving ruler (14) and a fixed ruler (15); the measuring circuit board (13) is fixed on the support seat (1); the measuring circuit board (13) is connected to the controller (9); the fixed ruler (15) is fixedly connected to the measuring circuit board (13); the moving ruler (14) is fixed on the tube pressing platform (3); the moving ruler (14) and the fixed ruler (15) cooperate to measure the stroke of the moving heating device (7).

2. The automatic flat-pressure aseptic tube sealing machine according to claim 1, characterized in that: The machine head (2) and the driving mechanism (4) are respectively fixed above and below the support seat (1); the driving mechanism (4) drives the dynamic heating device (7) to cooperate with the fixed heating device (5) to seal the tube vertically upwards through the tube pressing platform (3).

3. The automatic flat-pressure aseptic tube sealing machine according to claim 1, characterized in that: The machine head (2) and the driving mechanism (4) are respectively fixed on both sides of the support seat (1), and the driving mechanism (4) drives the moving heating device (7) to cooperate with the fixed heating device (5) to seal the tube horizontally to the left or right through the tube pressing platform (3).

4. The automatic flat-pressure aseptic tube sealing machine according to claim 1, characterized in that: The fixed heating device (5) and the dynamic heating device (7) both comprise a metal heating plate (20), a temperature sensor (21), a heating bed (22), a support plate (23), a connecting lead (24) and a connecting piece. The metal heating plate (20) is fixed to the support plate (23) via the heating bed (22). The temperature sensor (21) is fixed between the metal heating plate (20) and the heating bed (22). The connecting lead (24) is fixed between the heating bed (22) and the support plate (23). One end of the connecting lead (24) is connected to the controller (9), and the other end is connected to the metal heating plate (20) and the temperature sensor (21) via the connecting piece. The fixed heating device (5) is fixed to the machine head (2) via the support plate (23), and the dynamic heating device (7) is fixed to the tube pressing platform (3) via the support plate (23).

5. The automatic flat-pressure aseptic tube sealing machine according to claim 4, characterized in that: The connecting member comprises an electrode ejector pin (25) and a tower spring (26); the electrode ejector pin (25) is arranged in the heating bed (22), and the electrode ejector pin (25) corresponds to the electrode of the metal heating plate (20) and the temperature sensor (21) respectively; the tower spring (26) is arranged in the support plate (23) and connected to the electrode ejector pin (25); and the connecting lead (24) is connected to the metal heating plate (20) and the temperature sensor (21) through the electrode ejector pin (25).

6. The automatic flat-pressure aseptic tube sealing machine according to claim 4, characterized in that: The metal heating plate (20) comprises a polytetrafluoroethylene anti-sticking layer (27), a metal plate (28), a thick film circuit (29) and an insulating layer (30) which are fixed in sequence, and the temperature sensor (21) is fixed in the middle of the insulating layer (30).

7. The automatic flat-pressure aseptic tube sealing machine according to claim 4, characterized in that: The heating bed (22) is provided with air outlets (32) and air inlets (31) communicating with an air pump (34) fixed in the chassis (8) at both ends thereof; the heating bed (22) is provided with a groove for fixing the metal heating plate (20); the groove is provided with ventilation slots (33) respectively communicating with the air inlet (31) and the air outlet (32).

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