Punching-free production line for expanding heat-shrinkable tube and machining method thereof
阅读说明：本技术 一种热缩管扩管的免打孔生产线及其加工方法 (Punching-free production line for expanding heat-shrinkable tube and machining method thereof ) 是由 陈鹏 杨焕培 李兴光 陈国强 于 2019-09-17 设计创作，主要内容包括：本发明公开了一种热缩管扩管的免打孔生产线,包括原料盘,所述的原料盘上缠绕热缩管,热缩管尾端穿过原料盘侧部并与可旋转的气嘴相连通,气嘴连接真空泵；扩管机构,扩管机构包括热缩管加热段、热缩管干扩段、热缩管冷却定型段和热缩管压扁排气段；收料机构,收料机构包括收卷盘和张力控制装置,收卷盘转动实现热缩管扁管缠绕,张力控制装置包括悬空设置的调节盘和杠杆结构,杠杆结构包括可转动的横杆,横杆一端固定调节盘,横杆另一端设有可调砝码,横杆的转动节点处安装有传感器,传感器与电机的变频器通讯连接,热缩管扁管成型后经调节盘后缠绕于收卷盘上完成收料。本装置可实现干扩机连续生产且不需要打孔,有效降低劳动强度和提高产品品质。(The invention discloses a perforation-free production line for expanding a heat-shrinkable tube, which comprises a raw material disc, wherein the heat-shrinkable tube is wound on the raw material disc, the tail end of the heat-shrinkable tube penetrates through the side part of the raw material disc and is communicated with a rotatable air nozzle, and the air nozzle is connected with a vacuum pump; the pipe expanding mechanism comprises a heat shrinkable pipe heating section, a heat shrinkable pipe dry expanding section, a heat shrinkable pipe cooling and shaping section and a heat shrinkable pipe flattening exhaust section; receiving agencies, receiving agencies includes rolling dish and tension control device, and the rolling dish rotates and realizes the winding of the flat tub of pyrocondensation pipe, and tension control device includes unsettled adjusting disk and the lever structure who sets up, and the lever structure includes rotatable horizontal pole, the fixed adjusting disk of horizontal pole one end, and the horizontal pole other end is equipped with adjustable weight, and the sensor is installed to the rotation node of horizontal pole, and the sensor is connected with the converter communication of motor, twine behind the flat tub shaping of pyrocondensation pipe and accomplish on the rolling dish and receive the material. The device can realize continuous production of the dry expanding machine without punching, effectively reduces labor intensity and improves product quality.)
1. A perforation-free production line for expanding heat-shrinkable tubes is characterized by comprising a raw material disc, wherein the heat-shrinkable tubes are wound on the raw material disc, the tail ends of the heat-shrinkable tubes penetrate through the side part of the raw material disc and are communicated with a rotatable air nozzle, and the air nozzle is connected with a vacuum pump;
the pipe expanding mechanism comprises a heat shrinkable pipe heating section, a heat shrinkable pipe dry expanding section, a heat shrinkable pipe cooling and shaping section and a heat shrinkable pipe flattening exhaust section, wherein the heat shrinkable pipe heating section heats and softens the heat shrinkable pipe in the pipe through a heating pipeline, the heat shrinkable pipe dry expanding section vacuumizes between the inner wall of a dry expanding die and the outer wall of the heat shrinkable pipe to enlarge the diameter of the heat shrinkable pipe, the heat shrinkable pipe cooling and shaping section expands the heat shrinkable pipe to be attached to the inner wall of the dry expanding die through introducing cooling liquid into a cavity of the dry expanding die and then shapes, and the heat shrinkable pipe flattening exhaust section flattens and exhausts the heat shrinkable pipe to a heat shrinkable pipe cavity in the dry expanding die through a pinch roller;
receiving agencies, receiving agencies include rolling dish and tension control device, the rolling dish rotates and realizes the winding of the flat pipe of pyrocondensation pipe, the rolling wheel bottom of rolling dish is equipped with two rubber tyers, the rubber tyer passes through motor drive and rotates, tension control device includes unsettled adjusting disk and the lever structure who sets up, the lever structure includes rotatable horizontal pole, the fixed adjusting disk of horizontal pole one end, the horizontal pole other end is equipped with adjustable weight, the sensor is installed to the rotation node of horizontal pole, the sensor is connected with the converter communication of motor, the winding is accomplished on the rolling dish after the shaping of the flat pipe of pyrocondensation pipe after the adjusting disk and is received the material.
2. The perforation-free production line for expanding the heat shrinkable tube according to claim 1, wherein the dry expanding die comprises a die jacket, and a vacuum nozzle, a water inlet hole and a water outlet hole are sequentially processed on the die jacket; the inner core is positioned in the cavity of the outer sleeve of the mold, a sleeve hole is processed in the inner core, the heat-shrinkable tube penetrates through a vacuum cavity between the sleeve hole and the inner wall of the inner core, and a vacuum suction hole and a vacuum gap are formed in the vacuum cavity; and the die nozzle is matched with the sleeve hole, is arranged at the center of one end of the die outer sleeve and is used for positioning the heat-shrinkable tube.
3. The hole-free production line for expanding the heat shrinkable tube according to claim 2, wherein the cavity between the outer die sleeve and the inner core at the side of the die nozzle is communicated through the vacuum nozzle, and the cavity between the outer die sleeve and the inner core at the side far from the die nozzle is communicated with the water outlet hole through the water inlet hole.
4. The hole-free production line for expanding the heat shrinkable tube according to claim 3, wherein the vacuum chamber is provided with a plurality of vacuum suction holes communicated with the sleeve hole, and the vacuum suction holes and the vacuum gaps are communicated with the vacuum nozzle.
5. The perforation-free production line for the expansion of the heat shrinkable tube according to claim 1, wherein the material receiving mechanism further comprises a steering wheel arranged between the adjusting disc and the winding disc, the steering wheel is mounted on a nut seat, the nut seat is in threaded connection with a screw rod, the screw rod is parallel to the axial direction of the winding disc and is driven by a motor, the winding disc comprises a first winding wheel and a second winding wheel, and a rotating shaft for winding the flat tube of the heat shrinkable tube to receive the material is mounted between the first winding wheel and the second winding wheel.
6. The perforation-free production line for expanding the heat shrinkable tube according to claim 5, wherein a notch is formed in the first winding wheel, the flat heat shrinkable tube passes through the notch and is rotatably fixed on the inflatable support, the flat heat shrinkable tube and an air nozzle on the inflatable support are connected with an air pump, the rubber wheel is driven by a first motor, the output shaft of the first motor is coaxial with the rubber wheel after the speed of the first motor is reduced by a speed reducer, the first motor is connected with a frequency converter, the screw rod is driven by a second motor, the output shaft of the second motor is coaxial with the screw rod after the speed of the second motor is reduced by the speed reducer, and the second motor is connected with the frequency converter.
7. The hole-free production line for expanding the heat shrinkable tube according to claim 6, wherein a cross bar of the lever structure is perpendicular to the axial direction of the adjusting disc, the cross bar is connected with a weight through a thread, the sensor is a pressure sensor, the frequency converter is further connected with an ultrasonic sensor, and the ultrasonic sensor is connected with an expanding frequency converter in the heat shrinkable tube expanding mechanism.
8. The method for processing a perforation-free production line for expanding heat shrinkable tubes according to any one of claims 1 to 7, comprising the steps of:
s1, one end of an air nozzle is connected with the tail end of a heat-shrinkable tube on a raw material disc, a vacuum meter and a vacuum flow valve are connected between the other end of the air nozzle and a vacuum pump through a guide tube, the vacuum pump is started, and the size of the vacuum flow valve is adjusted;
s2, operating a pipe expanding mechanism, manually dragging the front end of the heat-shrinkable pipe on the raw material disc to a station of the pipe expanding mechanism, and then sequentially starting a heating section of the heat-shrinkable pipe, a dry expanding section of the heat-shrinkable pipe, a cooling and shaping section of the heat-shrinkable pipe and a flattening and exhausting section of the heat-shrinkable pipe;
and S3, manually dragging the flat pipe processed by the flattening exhaust section of the heat-shrinkable tube to a material receiving plate of the material receiving mechanism to wind for receiving.
9. The hole-free production line and the processing method for expanding the heat shrinkable tube as claimed in claim 8, wherein in step S1, the raw material tray is rotated to discharge the material, the side opening of the raw material tray connects the tail end of the heat shrinkable tube to an external air nozzle, the air nozzle is mounted on a rotary head, and the rotary head is mounted on the bracket.
Technical Field
The invention relates to the technical field of improved design of heat-shrinkable tube expanding production, in particular to a perforation-free production line for heat-shrinkable tube expanding and a processing method thereof.
Background
In the prior art, the expansion of heat-shrinkable tubing is mainly used in the current stage of expansion production by a vacuum expansion method, less compressed air is introduced into the interior of a pipe, when the heated pipe passes through an expansion mould, the interior wall of the mould and the exterior of the pipe are vacuumized, so that a certain pressure difference is caused between the interior and the exterior of the pipe, the pipe is expanded to be tightly attached to the inner wall of the mould under the action of the pressure difference between the interior and the exterior, and the pipe is cooled and shaped when contacting the inner wall of the mould, so that a required product is obtained. The pipe with the inner diameter of less than 6 mm is produced in a circular pipe form, and the pipe with the inner diameter of more than 6 mm is produced in a flat pipe form by using a dry expanding machine. When flat pipe production, the tubular product that comes out from the mould mouth is cylindrical, makes tubular product become flat pipe through the pinch roller extrusion, can make the inside air of tubular product form atmospheric pressure and go toward the tubular product back end when the pinch roller extrudes cylindrical tubular product, so the tubular product back end must have an exhaust port, just can make the sleeve pipe expand under certain pressure, and natural atmospheric pressure is arranged and can not go out, and is bigger and bigger, can make the sleeve pipe inflation, can't cross the mould, can not expand.
The expansion of the flat tube of the dry expansion machine at the present stage mainly adopts two methods, wherein one method is that each round of tube is wound for 300 plus 500 meters, so that the tail end of the sleeve is ventilated and the exhaust port is expanded. Secondly, the winding of each round of the pipe is 8000 m for 2000-. Generally, the second method is used for punching holes on the sleeve to expand the flat tube, however, each round of tube has thousands of meters of tubes, manual air holes are required to be punched by operators when one round of tube is expanded and produced, and the machine is required to be adjusted again to expand each time one air hole tube is passed, so that the production intensity of the operators is high, and more production waste products are generated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a punching-free production line for expanding heat-shrinkable tubes and a processing method thereof, which can realize continuous production of a dry expanding machine without punching, effectively reduce labor intensity and improve product quality.
In order to achieve the purpose, the invention adopts the technical scheme that: a perforation-free production line for expanding heat-shrinkable tubes comprises a raw material disc, wherein heat-shrinkable tubes are wound on the raw material disc, the tail ends of the heat-shrinkable tubes penetrate through the side part of the raw material disc and are communicated with a rotatable air nozzle, and the air nozzle is connected with a vacuum pump;
the pipe expanding mechanism comprises a heat shrinkable pipe heating section, a heat shrinkable pipe dry expanding section, a heat shrinkable pipe cooling and shaping section and a heat shrinkable pipe flattening exhaust section, wherein the heat shrinkable pipe heating section heats and softens the heat shrinkable pipe in the pipe through a heating pipeline, the heat shrinkable pipe dry expanding section vacuumizes between the inner wall of a dry expanding die and the outer wall of the heat shrinkable pipe to enlarge the diameter of the heat shrinkable pipe, the heat shrinkable pipe cooling and shaping section expands the heat shrinkable pipe to be attached to the inner wall of the dry expanding die through introducing cooling liquid into a cavity of the dry expanding die and then shapes, and the heat shrinkable pipe flattening exhaust section flattens and exhausts the heat shrinkable pipe to a heat shrinkable pipe cavity in the dry expanding die through a pinch roller;
receiving agencies, receiving agencies include rolling dish and tension control device, the rolling dish rotates and realizes the winding of the flat pipe of pyrocondensation pipe, the rolling wheel bottom of rolling dish is equipped with two rubber tyers, the rubber tyer passes through motor drive and rotates, tension control device includes unsettled adjusting disk and the lever structure who sets up, the lever structure includes rotatable horizontal pole, the fixed adjusting disk of horizontal pole one end, the horizontal pole other end is equipped with adjustable weight, the sensor is installed to the rotation node of horizontal pole, the sensor is connected with the converter communication of motor, the winding is accomplished on the rolling dish after the shaping of the flat pipe of pyrocondensation pipe after the adjusting disk and is received the material.
The dry-expanding die comprises a die jacket, wherein a vacuum nozzle, a water inlet hole and a water outlet hole are sequentially processed on the die jacket; the inner core is positioned in the cavity of the outer sleeve of the mold, a sleeve hole is processed in the inner core, the heat-shrinkable tube penetrates through a vacuum cavity between the sleeve hole and the inner wall of the inner core, and a vacuum suction hole and a vacuum gap are formed in the vacuum cavity; and the die nozzle is matched with the sleeve hole, is arranged at the center of one end of the die outer sleeve and is used for positioning the heat-shrinkable tube.
The cavity between the die outer sleeve and the inner core, which is positioned at one side of the die nozzle, is communicated through the vacuum nozzle, and the cavity between the die outer sleeve and the inner core, which is far away from one side of the die nozzle, is communicated with the water outlet hole through the water inlet hole.
The vacuum cavity is provided with a plurality of vacuum suction holes communicated with the sleeve hole, and the vacuum suction holes and the vacuum gaps are communicated with the vacuum nozzle.
The receiving agencies still including setting up the steering wheel between adjustment disc and rolling dish, the steering wheel is installed on the nut seat, nut seat and lead screw threaded connection, the axial direction parallel of lead screw and rolling dish passes through motor drive, the rolling dish includes first rolling wheel and second rolling wheel, install the pivot that is used for twining the flat pipe realization of pyrocondensation pipe and receive the material between first rolling wheel and the second rolling wheel.
The first winding wheel is provided with a notch, the heat shrinkable tube flat tube penetrates through the notch and then is rotationally fixed on the inflatable support, the heat shrinkable tube flat tube and an air nozzle on the inflatable support are connected with the air pump, the rubber wheel is driven by the first motor, the first motor is coaxial with the rubber wheel through the speed reduction of the speed reducer, the first motor is connected with the frequency converter, the lead screw is driven by the second motor, the second motor is coaxial with the lead screw through the speed reduction of the speed reducer, and the second motor is connected with the frequency converter.
The horizontal pole of lever structure and the axial of adjustment disk perpendicular, the horizontal pole passes through threaded connection weight, and the sensor is pressure sensor, and the ultrasonic sensor is still connected to the converter, the expansion converter in the thermal shrinkage pipe expansion mechanism is connected to the ultrasonic sensor.
A processing method of a perforation-free production line for expanding heat shrinkable tubes comprises the following steps:
s1, one end of an air nozzle is connected with the tail end of a heat-shrinkable tube on a raw material disc, a vacuum meter and a vacuum flow valve are connected between the other end of the air nozzle and a vacuum pump through a guide tube, the vacuum pump is started, and the size of the vacuum flow valve is adjusted;
s2, operating a pipe expanding mechanism, manually dragging the front end of the heat-shrinkable pipe on the raw material disc to a station of the pipe expanding mechanism, and then sequentially starting a heating section of the heat-shrinkable pipe, a dry expanding section of the heat-shrinkable pipe, a cooling and shaping section of the heat-shrinkable pipe and a flattening and exhausting section of the heat-shrinkable pipe;
and S3, manually dragging the flat pipe processed by the flattening exhaust section of the heat-shrinkable tube to a material receiving plate of the material receiving mechanism to wind for receiving.
In step S1, the raw material tray rotates to discharge the material, the side opening of the raw material tray connects the tail end of the heat shrink tube with an external air nozzle, the air nozzle is installed on the rotating head, and the rotating head is installed on the bracket.
Compared with the prior art, the invention has the beneficial effects that: the production line of the device can realize continuous production of 7000-plus 8000-meter pipes without punching, adopts a dry expansion and punching-free expansion processing method, does not need manual punching of operators, effectively reduces labor intensity, reduces production rejection rate, and improves product quality.
Drawings
FIG. 1 is a schematic view of a dry-expanding mold of the present invention;
fig. 2 is a schematic structural view of a winding disc of the present invention.
The labels in the figures are: 1. a die nozzle; 2. sleeving a mold sleeve; 3. a vacuum nozzle; 4. a water inlet hole; 5. a vacuum chamber; 6. sleeving the pipe hole; 7. a vacuum suction hole; 8. a water outlet hole; 9. an inflatable support; 10. a first winding wheel; 11. cutting; 12. a second wind-up wheel; 13. a rubber wheel; 14. a screw rod; 15. a steering wheel; 16. a nut seat; 17. a first motor; 18. a second motor.
Detailed Description
The following detailed description is provided in conjunction with the embodiments and with reference to the accompanying drawings in order to provide a further explanation of the technical features and advantages of the present invention.
As shown in fig. 1-2, the punching-free production line for expanding the heat shrinkable tube of the present invention comprises a raw material tray, wherein the raw material tray is wound with the heat shrinkable tube, the tail end of the heat shrinkable tube penetrates through the side of the raw material tray and is communicated with a rotatable air nozzle, and the air nozzle is connected with a vacuum pump;
the pipe expanding mechanism comprises a heat shrinkable pipe heating section, a heat shrinkable pipe dry expanding section, a heat shrinkable pipe cooling and shaping section and a heat shrinkable pipe flattening exhaust section, wherein the heat shrinkable pipe heating section heats and softens the heat shrinkable pipe in the pipe through a heating pipeline, the heat shrinkable pipe dry expanding section vacuumizes between the inner wall of a dry expanding die and the outer wall of the heat shrinkable pipe to enlarge the diameter of the heat shrinkable pipe, the heat shrinkable pipe cooling and shaping section expands the heat shrinkable pipe to be attached to the inner wall of the dry expanding die through introducing cooling liquid into a cavity of the dry expanding die and then shapes, and the heat shrinkable pipe flattening exhaust section flattens and exhausts the heat shrinkable pipe to a heat shrinkable pipe cavity in the dry expanding die through a pinch roller;
receiving agencies, receiving agencies include rolling dish and tension control device, the rolling dish rotates and realizes the winding of the flat pipe of pyrocondensation pipe, the rolling wheel bottom of rolling dish is equipped with two rubber tyers 13, the rubber tyer passes through motor drive and rotates, tension control device includes unsettled adjusting disk and the lever structure who sets up, the lever structure includes rotatable horizontal pole, the adjusting disk is fixed to horizontal pole one end, the horizontal pole other end is equipped with adjustable weight, the sensor is installed to the rotation node of horizontal pole, the sensor is connected with the converter communication of motor, the winding is accomplished on the rolling dish after the adjusting disk after the flat pipe shaping of pyrocondensation pipe and is received the material.
Further, as shown in fig. 1, the dry-expanding die comprises a
Further, the cavity between the outer die sleeve and the inner core, which is positioned at one side of the die nozzle, is communicated through a vacuum nozzle, the cavity between the outer die sleeve and the inner core, which is positioned at one side far away from the die nozzle, is communicated through a water inlet hole and a water outlet hole, a plurality of
Further, the receiving mechanism further comprises a steering wheel 15 arranged between the adjusting disc and the winding disc, the steering wheel is installed on a nut seat 16, the nut seat is in threaded connection with a screw rod 14, the screw rod is parallel to the axial direction of the winding disc and is driven by a motor, the winding disc comprises a first winding
Furthermore, the rubber wheel is driven by a first motor 17, the output shaft of the first motor is coaxial with the rubber wheel after the speed of the first motor is reduced by a speed reducer, and the first motor is connected with a frequency converter. The lead screw pass through second motor 18 drive, the output shaft is coaxial with the lead screw after the second motor slows down through the speed reducer, the second motor links to each other with the converter, the horizontal pole of lever structure be perpendicular with the axial of adjusting disk, the horizontal pole passes through threaded connection weight, rotates the weight and can adjust its position at the horizontal pole, realizes the balance adjustment of lever structure. The sensor is a pressure sensor, the frequency converter is also connected with an ultrasonic sensor, and the ultrasonic sensor is connected with an expansion frequency converter in the heat shrinkage pipe expansion mechanism. When the exit tube speed of pyrocondensation pipe becomes fast, the effort that the pyrocondensation pipe was applyed in adjustment disk department descends, receive the influence of weight dead weight, lever structure automatically regulated is balanced, pressure sensor received signal and transmission give the converter this moment, make first motor and second motor increase the rotational speed respectively, in order to guarantee that the pyrocondensation pipe winding remains certain tension throughout and be unlikely to break away from steering wheel or other stations, simultaneously among the expansion converter among the pyrocondensation pipe expansion mechanism, be equipped with ultrasonic sensor on the dry expansion mould, this sensor can transmit the fluctuation signal of tension respectively for the expansion converter in the pyrocondensation pipe expansion process and the converter of motor in the pyrocondensation pipe receipts material process, realize the speed regulation of expansion process and receipts material process, until stable production.
Specifically, the winding disc comprises a fixing frame with the length of one meter and the width of one meter, four rubber wheels are connected to the fixing frame, the rubber wheels are connected through screws, the screws are connected with first motors, a steering wheel is placed on the steering frame and connected with a screw rod through a nut seat, the screw rod is connected with a second motor, and the rotating speeds of the two motors are connected with the ultrasonic sensor through a frequency converter. During rolling, place two rolling wheels on four rubber tyers on the mount, open first motor, four rubber tyers relative motion, it rotates to drive the rolling wheel through frictional force, the pyrocondensation pipe comes out the back from the cooling trough, pull through the guide pulley location (guide pulley connection tensioner, the last ultrasonic sensor that is equipped with of tensioner), carry to the steering wheel behind the tension adjusting disk, pull to rolling dish winding receipts material at last, there is a incision first rolling wheel one side, there is an air cock fixation clamp near the incision, the air cock fixation clamp is rotationally installed on aerifing the support, the pyrocondensation pipe passes the incision and is linked together with the air cock, air exhauster or air compressor machine are connected to the air cock, realize expanding rolling on one side. The rolling speed is controlled by the frequency converter, the frequency converter is connected with the ultrasonic sensor, and the ultrasonic sensor is connected with the expansion frequency converter, so that the rolling speed and the expansion speed can be synchronous, automatic rolling is realized, and manual adjustment is not needed.
A processing method of a perforation-free production line for expanding heat shrinkable tubes comprises the following steps:
s1, one end of an air nozzle is connected with the tail end of a heat-shrinkable tube on a raw material disc, a vacuum meter and a vacuum flow valve are connected between the other end of the air nozzle and a vacuum pump through a guide tube, the vacuum pump is started, and the size of the vacuum flow valve is adjusted;
s2, operating a pipe expanding mechanism, manually dragging the front end of the heat-shrinkable pipe on the raw material disc to a station of the pipe expanding mechanism, and then sequentially starting a heating section of the heat-shrinkable pipe, a dry expanding section of the heat-shrinkable pipe, a cooling and shaping section of the heat-shrinkable pipe and a flattening and exhausting section of the heat-shrinkable pipe;
and S3, manually dragging the flat pipe processed by the flattening exhaust section of the heat-shrinkable tube to a material receiving plate of the material receiving mechanism to wind for receiving.
In step S1, the raw material tray rotates to discharge the material, the side opening of the raw material tray connects the tail end of the heat shrink tube with an external air nozzle, the air nozzle is installed on the rotating head, and the rotating head is installed on the bracket.
In the practical operation process of the invention, the vacuum air nozzle is inserted into the tail end of the heat-shrinkable tube on the original tray, no gap is left to allow the air to leak, the matched vacuum air nozzle can be selected according to the diameter of the heat-shrinkable tube, the vacuum air nozzle is not loosened and separated from the heat-shrinkable tube, the rotating head on the guide pipe connecting support is required to ensure that the rotating head and the raw tray relatively rotate to avoid the support from loosening, the state of the heat-shrinkable tube is checked by touching the tube frequently in the production process, the punching-free production is carried out by adjusting the vacuum degree according to the pressure in the tube, if the pressure in the heat-shrinkable tube is reduced, when a flat tube is generated, no effect is obtained by adjusting the vacuum degree to zero, the vacuum degree switch is adjusted to expand under the exhaust state, and when the heat-shrinkable tube on the original tray is only 300-600 meters left, if the pressure in the tube is reduced, the vacuum.
In the device, equipment for air extraction such as a vacuum pump or an air extractor, a power device such as a motor and a frequency converter thereof, a sensor such as a pressure sensor or an ultrasonic sensor and the like are the prior art or materials, and the technical personnel can directly purchase or order from the market according to the required product model and specification.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
The present invention is described in detail and completely by the technical solutions in the above embodiments, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
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