阅读说明：本技术 一种数控加工中心废料回收装置 (Numerical control machining center waste recovery device ) 是由 宋良永 于 2021-07-22 设计创作，主要内容包括：本发明提出了一种数控加工中心废料回收装置,涉及数控加工中心技术领域。一种数控加工中心废料回收装置,包括底座,底座顶部依次设置有第一运输机构、第二运输机构和压制机构,压制机构包括液压机和与液压机相配合的箱体,第一运输机构用于集中输送数控加工中心排出的加工废料,第二运输机构能够将加工废料运输至箱体内。本装置内的第一运输机构用于接收数控加工中心内排出的金属加工废料,使加工废料能够实现在运输的过程中自动集中；本发明通过多种机构的配合实现数控机床中心内排出的金属加工废料能够被高效集中处理收集,使加工废料能够在收集后进行二次利用,本装置无需多余人力介入,仅需单一工作人员对各机构进行操控即可。(The invention provides a waste recovery device of a numerical control machining center, and relates to the technical field of numerical control machining centers. The utility model provides a numerical control machining center waste recovery device, includes the base, and the base top has set gradually first transport mechanism, second transport mechanism and pressing mechanism, and pressing mechanism includes the hydraulic press and with hydraulic press matched with box, first transport mechanism be used for concentrating carry numerical control machining center exhaust processing waste material, and second transport mechanism can transport the processing waste material to the box in. The first conveying mechanism in the device is used for receiving metal processing waste discharged from the numerical control processing center, so that the processing waste can be automatically concentrated in the conveying process; the device realizes that the metal processing waste discharged from the center of the numerical control machine tool can be efficiently and intensively treated and collected through the cooperation of various mechanisms, so that the processing waste can be recycled after being collected.)

1. The utility model provides a numerical control machining center waste recovery device, its characterized in that, includes the base, the base top has set gradually first transport mechanism, second transport mechanism and pressing mechanism, pressing mechanism include the hydraulic press and with hydraulic press matched with box, first transport mechanism is used for concentrating and carries numerical control machining center exhaust processing waste material, second transport mechanism can with processing waste material transportation extremely in the box.

2. The numerical control machining center waste recycling device as claimed in claim 1, wherein the second transporting mechanism comprises an electric slide rail, an electric telescopic rod and an electromagnet which are erected on the top of the base, one end of the electric telescopic rod is slidably connected with the electric slide rail, the other end of the electric telescopic rod is connected with the electromagnet, the electric slide rail is located above the first transporting mechanism and the pressing mechanism, and the hydraulic machine is slidably connected with the electric slide rail.

3. The numerical control machining center waste recycling device as claimed in claim 1, wherein any one side wall of the box body is an opening and closing door, a plurality of baffles are detachably arranged in the box body along a vertical direction, and an accommodating chamber is arranged between any two baffles.

4. The numerical control machining center waste recycling device as recited in claim 3, wherein sliding grooves are formed in two opposite side walls in the box body, and the baffle is slidably disposed in the sliding grooves.

5. The numerical control machining center waste recovery device of claim 1, wherein the first transportation mechanism comprises a frame body, a driving wheel, a driven wheel, a conveying belt, a rotating motor and a blocking piece, the driving wheel and the driven wheel are respectively installed at two ends of the frame body, the conveying belt is wound on the driving wheel and the driven wheel, the rotating motor is connected with the driving wheel, and the blocking piece is installed at the top of the frame body and attached to the wall surface of the conveying belt.

6. The scrap recycling device for numerical control machining centers according to claim 5, wherein the blocking member comprises a hydraulic telescopic rod, one end of the hydraulic telescopic rod is hinged with the frame body, and the movable end of the hydraulic telescopic rod is used for blocking centralized machining scraps.

7. The scrap recycling apparatus for CNC machining centers as claimed in claim 6, wherein the pair of stopping members is a pair, and two stopping members are symmetrically installed on the top of the frame body.

8. The scrap recycling apparatus for CNC machining centers as claimed in claim 6, wherein the movable end of the hydraulic telescoping rod is bent toward the direction of transporting the machining scrap.

9. The numerical control machining center waste recycling device according to claim 1, further comprising a cleaning mechanism erected between the first transporting mechanism and the pressing mechanism, wherein the cleaning mechanism comprises a decontamination assembly and a drying assembly which are sequentially arranged, the decontamination assembly comprises a cabinet body, a filter screen which is slidably arranged in the cabinet body in a vertical direction, and an ultrasonic cleaner which is installed in the cabinet body, and the second transporting mechanism is used for transporting the machining waste to the cleaning mechanism.

10. The cnc machining center waste recycling device as recited in claim 9, wherein the drying component includes a blower and an electric heating wire net, the electric heating wire net is installed at an air outlet of the blower.

Technical Field

The invention relates to the technical field of numerical control machining centers, in particular to a waste recovery device of a numerical control machining center.

Background

The numerical control machining center is a high-efficiency automatic machine tool which consists of mechanical equipment and a numerical control system and is suitable for machining complex parts, the numerical control machining center is one of numerical control machines which have the highest yield and are most widely applied in the world at present, the comprehensive machining capacity of the numerical control machining center is high, a workpiece can finish more machining contents after being clamped once, the machining precision is high, batch workpieces with medium machining difficulty are machined, the efficiency of the batch workpieces is 5-10 times that of common equipment, especially, the batch workpieces can finish machining which cannot be finished by a plurality of common equipment, the numerical control machining center is more suitable for single-piece machining or small-batch multi-variety production with complex shapes and high precision requirements, the functions of milling, boring, drilling, tapping, cutting and the like are integrated on one piece of equipment, the numerical control machining center has a plurality of technological means according to spatial positions during machining of a main shaft: horizontal and vertical machining centers. Numerical control machining center is when carrying out processing work, and along with the increase of time, a large amount of iron fillings waste materials can be accumulated in its bottom, just need often carry out recovery processing to the iron fillings waste material of its bottom in order to can ensure numerical control machining center's work efficiency.

The waste materials have different purposes according to different particle sizes after being recycled, but the waste material recycling device of the current numerical control machining center has single function, only directly and uniformly gathers the waste materials in a material collecting box, and the scattered waste materials are not easy to treat everywhere.

Disclosure of Invention

The invention aims to provide a waste recovery device of a numerical control machining center, which can better collect and treat machining waste discharged by the numerical control machining center in a centralized manner.

The embodiment of the invention is realized by the following steps:

the embodiment of the application provides a numerical control machining center waste recovery device, the on-line screen storage device comprises a base, the base top has set gradually first transport mechanism, second transport mechanism and pressing mechanism, pressing mechanism include the hydraulic press and with hydraulic press matched with box, first transport mechanism is used for concentrating and carries numerical control machining center exhaust processing waste material, second transport mechanism can with processing waste material transport extremely in the box.

In some embodiments of the present invention, the second transportation mechanism includes an electric slide rail, an electric telescopic rod, and an electromagnet, the electric slide rail is erected on the top of the base, one end of the electric telescopic rod is slidably connected to the electric slide rail, the other end of the electric telescopic rod is connected to the electromagnet, the electric slide rail is located above the first transportation mechanism and the pressing mechanism, and the hydraulic machine is slidably connected to the electric slide rail.

In some embodiments of the present invention, any one side wall of the box body is an opening and closing door, a plurality of baffles are detachably arranged in the box body along a vertical direction, and an accommodating chamber is arranged between any two baffles.

In some embodiments of the present invention, two opposite side walls in the box body are provided with sliding grooves, and the baffle is slidably disposed in the sliding grooves.

In some embodiments of the present invention, the first transportation mechanism includes a frame body, a driving wheel, a driven wheel, a transportation belt, a rotating motor and a blocking member, the driving wheel and the driven wheel are respectively installed at two ends of the frame body, the transportation belt is wound around the driving wheel and the driven wheel, the rotating motor is connected with the driving wheel, and the blocking member is installed at the top of the frame body and attached to a wall surface of the transportation belt.

In some embodiments of the present invention, the blocking member includes a hydraulic telescopic rod, one end of the hydraulic telescopic rod is hinged to the frame, and a movable end of the hydraulic telescopic rod is used for blocking centralized processing waste.

In some embodiments of the present invention, the pair of blocking members is provided, and two blocking members are symmetrically installed on the top of the frame body.

In some embodiments of the present invention, the movable end of the hydraulic telescopic rod is bent toward the processing waste transportation direction.

In some embodiments of the present invention, the cleaning mechanism is erected between the first transporting mechanism and the pressing mechanism, the cleaning mechanism includes a decontamination assembly and a drying assembly which are sequentially arranged, the decontamination assembly includes a cabinet body, a filter screen which is slidably arranged in the cabinet body along a vertical direction, and an ultrasonic cleaner which is installed in the cabinet body, and the second transporting mechanism is used for transporting the processing waste to the cleaning mechanism.

In some embodiments of the present invention, the drying assembly includes a fan and an electric heating wire mesh, and the electric heating wire mesh is installed at an air outlet of the fan.

Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:

the embodiment of the application provides a numerical control machining center waste recovery device, including the base, the base top has set gradually first transport mechanism, second transport mechanism and pressing mechanism, pressing mechanism include the hydraulic press and with hydraulic press matched with box, first transport mechanism is used for concentrating the exhaust processing waste material of carrying numerical control machining center, second transport mechanism can transport the processing waste material to the box in. The base is used for erecting each mechanism in the device, so that each mechanism forms assembly line type operation and the use stability of each mechanism can be ensured; the first conveying mechanism in the device is used for receiving metal processing waste discharged from the center of the numerical control processing center, and can collect and convey the processing waste to one side of the pressing mechanism, so that the processing waste can be automatically collected in the conveying process, and the problem that the processing waste is scattered around in the conveying process and cannot be completely collected and conveyed is avoided; the second conveying mechanism can hoist the processing waste materials concentrated by the first conveying mechanism and convey the processing waste materials into the pressing mechanism for centralized treatment; the pressing mechanism comprises a hydraulic machine and a box body matched with the hydraulic machine, the processing waste materials are conveyed into the box body through the second conveying mechanism and are flattened by the pressure of the hydraulic machine, the flattened processing waste materials are more convenient for workers to recover and carry out secondary utilization treatment, the design can ensure that sharp corners of the fragmentary processing waste materials are flattened, the problem that the fragmentary processing waste materials are hurt to the workers is avoided, part of the processing waste materials can be pressed together through pressurization, the workers do not need to collect one by one, the working flow is greatly shortened, and the collecting efficiency is improved; according to the device, the metal processing waste discharged from the center of the numerical control machine tool can be efficiently and intensively processed and collected through the cooperation of various mechanisms, so that the processing waste can be recycled after being collected.

When in actual use, the position butt joint that the material was arranged with digit control machine tool center to staff with first transport mechanism, first transport mechanism transports the below of second transport mechanism after will processing the waste material is concentrated, utilizes the second transport mechanism to hoist it to the box in, recycles the hydraulic press and processes the suppression of waste material, processing waste material after the suppression by staff collection can.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic view of the overall structure of a recycling apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of an unfolded structure of the case according to the embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a first transporting mechanism according to an embodiment of the invention;

fig. 4 is a schematic view of an internal structure of the cabinet according to the embodiment of the present invention.

Icon: 1-a base; 2-a hydraulic press; 3, a box body; 301-opening and closing the door; 302-a baffle; 3021-a chute; 4-an electric slide rail; 401-electric telescopic rod; 4011-an electromagnet; 5-frame body; 501-a conveyer belt; 502-a barrier; 6-cabinet body; 601-ultrasonic cleaner; 602-a filter screen; 603-a sewage draining outlet; 7-a fan; 701-electric heating wire mesh.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" represents at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

Referring to fig. 1 and 2, fig. 1 is a schematic view of an overall structure of a recycling apparatus according to an embodiment of the present invention; fig. 2 is a schematic view of an unfolded structure of the box 3 according to the embodiment of the present invention.

The embodiment of the application provides a numerical control machining center waste recovery device, including base 1, 1 top of base has set gradually first transport mechanism, second transport mechanism and pressing mechanism, pressing mechanism include hydraulic press 2 and with hydraulic press 2 matched with box 3, first transport mechanism is used for concentrating and carries the numerical control machining center exhaust processing waste material, the second transport mechanism can transport the processing waste material to in the box 3. The base 1 is used for erecting each mechanism in the device, so that each mechanism forms assembly line type operation and the use stability of each mechanism can be ensured; the first conveying mechanism in the device is used for receiving metal processing waste discharged from the center of the numerical control processing center, and can collect and convey the processing waste to one side of the pressing mechanism, so that the processing waste can be automatically collected in the conveying process, and the problem that the processing waste is scattered around in the conveying process and cannot be completely collected and conveyed is avoided; the second conveying mechanism can hoist the processing waste materials concentrated by the first conveying mechanism and convey the processing waste materials into the pressing mechanism for centralized treatment; the pressing mechanism comprises a hydraulic machine 2 and a box body 3 matched with the hydraulic machine, machining waste materials are conveyed into the box body 3 through the second conveying mechanism and are flattened by the pressure of the hydraulic machine 2, the flattened machining waste materials are more convenient for workers to recover and carry out secondary utilization treatment, the design can ensure that sharp corners of the fragmentary machining waste materials are flattened, the problem that the fragmentary machining waste materials are hurt to the workers is avoided, partial machining waste materials can be pressed together through pressurization, the workers do not need to collect one by one, the working process is greatly shortened, and the collecting efficiency is improved; according to the device, the metal processing waste discharged from the center of the numerical control machine tool can be efficiently and intensively processed and collected through the cooperation of various mechanisms, so that the processing waste can be recycled after being collected.

When in actual use, the staff arranges the position butt joint of material with first transport mechanism and digit control machine tool center, and first transport mechanism transports the below of second transport mechanism after will processing the waste material is concentrated, utilizes second transport mechanism to hoist it to the box 3 in, recycles hydraulic press 2 and carries out the suppression of processing the waste material, and the processing waste material after the suppression is collecting by the staff can.

In some embodiments of the present invention, as shown in fig. 1, the second transportation mechanism includes an electric slide rail 4 erected on the top of the base 1, an electric telescopic rod 401 and an electromagnet 4011, one end of the electric telescopic rod 401 is slidably connected to the electric slide rail 4, the other end of the electric telescopic rod 401 is connected to the electromagnet 4011, the electric slide rail 4 is located above the first transportation mechanism and the pressing mechanism, and the hydraulic machine 2 is slidably connected to the electric slide rail 4.

Electronic slide rail 4 in this embodiment erects along 1 length direction of base, and is the "U" word form of inversion, and electric telescopic handle 401 can realize sliding on electronic slide rail 4, and the electro-magnet 4011 of usable its tip installation realizes the hoist and mount to the processing waste material, concentrates the back when first transport mechanism with the processing waste material, utilizes electro-magnet 4011 again to adsorb whole processing waste material to slide to pressing mechanism department through electronic slide rail 4 and put in.

In some embodiments of the present invention, as shown in fig. 2, an opening and closing door 301 is disposed on any one side wall of the box 3, a plurality of baffles 302 are detachably disposed in the box 3 along a vertical direction, and a receiving chamber is disposed between any two baffles 302.

The side wall of the box body 3 in the embodiment is provided with a hinged opening and closing door 301, and the opening and closing door 301 enables a worker to collect and utilize the pressed processing waste; the baffle 302 in this embodiment is three, because the processing waste material of carrying at every turn is the ration transport, and every staff's responsibility is different, and the staff that needs to wait for collecting the waste material carries out once only to collect and handles, then can erect first baffle 302 in box 3 after the first suppression and carry out the second time suppression again, so on and so on, until every layer of baffle 302 goes up the pressure-equalizing system and has the processing waste material after, the staff that alright wait for collecting the waste material carries out once only to collect.

In some embodiments of the present invention, as shown in fig. 2, two opposite side walls of the box 3 are provided with sliding slots 3021, and the baffle 302 is slidably disposed in the sliding slots 3021. The sliding grooves 3021 formed in the two opposite side walls in the box body 3 enable the baffle 302 to be inserted into or pulled out from the sliding groove 3021, and the baffle 302 is locked in the sliding groove 3021 when the opening and closing door 301 is closed, so that the baffle 302 is disassembled more quickly, and the working efficiency of the invention is improved when in use.

In some embodiments of the present invention, as shown in fig. 1 and 3, the first transportation mechanism includes a frame 5, a driving wheel, a driven wheel, a conveyer 501, a rotating motor and a blocking member 502, the driving wheel and the driven wheel are respectively installed at two ends of the frame 5 and are conveyed to and wound around the driving wheel and the driven wheel, the rotating motor is connected with the driving wheel, and the blocking member 502 is installed at the top of the frame 5 and is attached to a wall surface of the conveyer 501.

The blocking member 502 in this embodiment can convey the processing waste material conveyed on the conveyor 501 to the same track in the same direction, so that the processing waste material can be collected and then conveyed to the next process through the conveyor 501.

In some embodiments of the present invention, as shown in fig. 1 and 3, the blocking member 502 comprises a hydraulic telescopic rod, one end of which is hinged to the frame body 5, and the movable end of which is used for blocking centralized processing waste.

The hydraulic telescopic rod in the embodiment is mounted on the frame body 5 through the motor, and the position of the hydraulic telescopic rod on the conveying belt 501 can be adjusted through electric control, so that the width of a path through which processing waste passes is adjusted; and the blocking piece 502 is a hydraulic telescopic rod which can be adjusted to adapt to the conveying belt 501 with different widths.

In some embodiments of the present invention, as shown in fig. 1 and 3, the stoppers 502 are a pair, and two stoppers 502 are symmetrically installed on the top of the frame body 5.

In this embodiment, the passing path of the processing waste can be adjusted together by arranging the two blocking members 502, and the advancing path of the processing waste is kept in the middle of the conveying belt 501, so that the subsequent transportation process is more convenient and faster.

In some embodiments of the invention, the free end of the hydraulic telescoping rod is bent towards the processing waste transport direction. This device sets up hydraulic telescoping rod's expansion end into the form of buckling and can avoid it to stop partial processing waste material at its tip, can ensure the normal transportation of processing waste material.

In some embodiments of the present invention, as shown in fig. 1 and 4, the cleaning mechanism is erected between the first transporting mechanism and the pressing mechanism, the cleaning mechanism includes a decontamination assembly and a drying assembly which are sequentially arranged, the decontamination assembly includes a cabinet 6, a filter screen 602 which is slidably arranged in the cabinet 6 along a vertical direction, and an ultrasonic cleaner 601 which is installed in the cabinet 6, and the second transporting mechanism is used for transporting the processing waste to the cleaning mechanism. The processing waste materials are mixed with a large amount of impurities such as scrap iron and dust after being treated, and the processing waste materials need to be cleaned by manpower after being collected, and the device is also provided with a cleaning mechanism erected on the base 1 for cleaning the processing waste materials, so that the processing waste materials can be recycled and reused conveniently; the decontamination assembly can clean the processing waste, a water body is filled in the cabinet body 6, the ultrasonic pen cleaner is used for cleaning all impurities, a sewage discharge port 603 is formed in the bottom of the cabinet body 6, so that the sewage can be discharged along the port, and meanwhile, the bottom of the cabinet body 6 is in a concave arc shape, so that the sewage can be completely emptied; simultaneously be provided with slidable filter screen 602 in the cabinet body 6, filter screen 602 is automatically controlled through the slide rail and is realized the oscilaltion, and after processing waste material washs and finishes, can hoist filter screen 602 lifting via the second conveying mechanism again can.

In some embodiments of the present invention, as shown in fig. 1, the drying assembly includes a blower 7 and an electric heating wire mesh 701, and the electric heating wire mesh 701 is installed at an air outlet of the blower 7.

The electric heating wire in the embodiment is connected with an external power supply, so that the wind blown out by the fan 7 can be heated; the processing waste material of hoist and mount through second transport mechanism can arrange fan 7 top in and dry, avoids the processing waste material to rust the unable reutilization's of condition to appear.

In summary, the embodiment of the invention provides a numerical control machining center waste recycling device, which comprises a base 1, wherein a first conveying mechanism, a second conveying mechanism and a pressing mechanism are sequentially arranged at the top of the base 1, the pressing mechanism comprises a hydraulic machine 2 and a box body 3 matched with the hydraulic machine 2, the first conveying mechanism is used for intensively conveying machining waste discharged by the numerical control machining center, and the second conveying mechanism can convey the machining waste into the box body 3. The base 1 is used for erecting each mechanism in the device, so that each mechanism forms assembly line type operation and the use stability of each mechanism can be ensured; the first conveying mechanism in the device is used for receiving metal processing waste discharged from the center of the numerical control processing center, and can collect and convey the processing waste to one side of the pressing mechanism, so that the processing waste can be automatically collected in the conveying process, and the problem that the processing waste is scattered around in the conveying process and cannot be completely collected and conveyed is avoided; the second conveying mechanism can hoist the processing waste materials concentrated by the first conveying mechanism and convey the processing waste materials into the pressing mechanism for centralized treatment; the pressing mechanism comprises a hydraulic machine 2 and a box body 3 matched with the hydraulic machine, machining waste materials are conveyed into the box body 3 through the second conveying mechanism and are flattened by the pressure of the hydraulic machine 2, the flattened machining waste materials are more convenient for workers to recover and carry out secondary utilization treatment, the design can ensure that sharp corners of the fragmentary machining waste materials are flattened, the problem that the fragmentary machining waste materials are hurt to the workers is avoided, partial machining waste materials can be pressed together through pressurization, the workers do not need to collect one by one, the working process is greatly shortened, and the collecting efficiency is improved; according to the device, the metal processing waste discharged from the center of the numerical control machine tool can be efficiently and intensively processed and collected through the cooperation of various mechanisms, so that the processing waste can be recycled after being collected.

When in actual use, the staff arranges the position butt joint of material with first transport mechanism and digit control machine tool center, and first transport mechanism transports the below of second transport mechanism after will processing the waste material is concentrated, utilizes second transport mechanism to hoist it to the box 3 in, recycles hydraulic press 2 and carries out the suppression of processing the waste material, and the processing waste material after the suppression is collecting by the staff can.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.