Lactose finished product is with transfer chain after filling
Technical Field
The invention relates to lactose production equipment, in particular to a conveying line for lactose finished products after filling.
Background
Lactose is a unique carbohydrate in human and mammalian milk and plays an important role in infant growth.
Lactose is disaccharide composed of glucose and galactose, and has molecular formula of C 12H22O11.
The function is as follows:
Lactose is an important energy source for infants.
Promoting brain development, wherein lactose participates in the development process of infant brain, and is helpful for the development of nerve tissue.
Regulating intestinal function, lactose is helpful for maintaining acid-base balance of intestinal tract and promoting normal defecation.
Promoting calcium absorption, and lactose can accelerate calcium absorption in vivo and promote bone development.
Lactose is powdered after finishing production, needs to be filled into a tank body, and then is packaged in a centralized way, and because of the problems of filling errors, equipment faults, tank deformation and the like, defective products of the filled products are produced, the defective products need to be taken down independently, the complete products need to be transported to the rear end for packaging treatment, and the transport line for transportation is required to be long-strip-shaped, so that the requirement on workshop space is high, and the installation and the operation are not facilitated.
In view of the above-mentioned drawbacks, the present inventors have actively studied and innovated to create a conveyor line for lactose products after filling, which has a more industrially useful value.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a conveying line for lactose finished products after filling.
The invention relates to a conveying line for lactose finished products after filling, which consists of four groups of conveying parts, wherein the four groups of conveying parts are in a rectangular structure, each group of conveying parts comprises a sliding plate frame for sliding out defective products, the front end of the sliding plate frame is transited to a feeding frame through a transfer frame, one side of the sliding plate frame is provided with a manipulator for holding the products, and the manipulator transfers the products to the sliding plate frame or the transfer frame;
the sliding plate frame, the transferring frame and the discharging frame are inclined, and the feeding frame is in butt joint with the lower ends of the transferring frame and the discharging frame;
The sliding plate frame, the transferring frame and the discharging frame are provided with rollers which are orderly arranged through shafts;
and a limiting mechanism for limiting is arranged in the middle of the transfer frame and the discharging frame.
The conveying line for the lactose finished products after filling comprises four groups of conveying parts, the four groups of conveying parts can synchronously carry out transferring operation, finished products and defective products can be transported in a classified mode, the defective products are guided out by the sliding plate frame, the finished products are transferred through the transfer frame, the feeding frame and the discharging frame, and the finished products are transferred to a station at the rear end, so that the finished products are conveniently taken and packaged.
The feeding frame forms a right angle shape after being in butt joint with the transferring frame and the discharging frame, so that four groups of conveying parts are convenient to splice to form a rectangular structure, and the installation space in a workshop can be saved.
The rolling shafts on the sliding plate frame, the transferring frame and the discharging frame are convenient for sliding products.
The limiting mechanisms arranged on the transfer frame and the discharging frame can be used for temporarily stopping products, so that excessive accumulation of local products is avoided.
Further, stop gear includes first spacing cylinder group and the spacing cylinder group of second, and first spacing cylinder group installs the upside at the spacing cylinder group of second, and first spacing cylinder group and the spacing cylinder group of second all include two cylinders, and the telescopic rod end portion of cylinder installs conical spacing head, and two cylinders of the spacing cylinder group of second appear as the mounting structure of obtuse angle form contained angle, the limited high clamp plate in the top of first spacing cylinder group and the spacing cylinder group of second, and first spacing cylinder group and the spacing cylinder group accessible bolt and nut fix in the arbitrary position of cylinder mount pad.
The limiting mechanism consists of a first limiting cylinder group and a second limiting cylinder group, and the first limiting cylinder group and the second limiting cylinder group can sequentially drive the limiting head to shrink, so that the limiting mechanism can be used for sequentially moving products, is convenient for separating the products and realizes the transfer of single products.
Further, the joint of the transfer rack and the feeding rack, and the joint of the feeding rack and the discharging rack are all provided with transfer mechanisms;
The transfer mechanism comprises a supporting plate in contact with the ground, a first air cylinder is installed on the supporting plate, a mounting base is fixed on the outer wall of the first air cylinder, a connecting frame is fixed on the rear side of the mounting base, a fixing frame is installed on the top end of the connecting frame, a sliding seat is fixed on one end of the fixing frame through the first sliding table cylinder, a transfer frame is fixed on the sliding seat through bolts, a bidirectional air cylinder is installed below the transfer frame, guide plates are installed on telescopic rods at two ends of the bidirectional air cylinder, a plurality of groups of connecting columns are fixed on the guide plates on one side, anti-skid blocks are installed at the lower ends of the connecting columns through shafts, the telescopic rods of the first air cylinder are fixedly connected with a mounting plate, the connecting columns are fixed on the mounting plate, and the top ends of the connecting columns extend into through holes in the middle of the supporting seat, and the supporting seat is fixedly connected with the fixing frame.
The transfer mechanism is convenient for transferring the product from the transfer frame to the feeding frame and transferring the product from the feeding frame to the discharging frame, so that the transfer of the product is convenient.
The first cylinder of transfer mechanism is used for driving the mounting panel and goes up and down to remove, installs the spliced pole on the mounting panel, and the top of spliced pole is used for driving the product and goes up and down to operate, is fixed with the mounting base on the outer wall of first cylinder, and this mounting base passes through link and mount fixed connection, and the first slip table jar of mount one end is used for driving the switching frame and removes, installs the bi-directional cylinder on the switching frame and drives the spliced pole and inwards remove, can press from both sides tightly the processing to the product, and then accomplishes and drive product transfer operation.
Further, the top end of the connecting column is provided with a plurality of rotating rollers movably installed through shafts, two vertical baffle rods are arranged on one side of the connecting column on the supporting seat, baffle strips for supporting are arranged on two sides of a through hole of the supporting seat, the front end of the supporting seat is provided with guide rollers which are in butt joint with the tail end of the sliding plate frame or the transferring frame, and the guide rollers are fixed on the supporting seat through shafts and the mounting frame.
The baffle rod on the supporting seat plays a role in blocking, and when the product moves, the baffle rod plays a role in blocking, so that the product is prevented from slipping from the connecting column, and the guide roller is used for guiding the product to slide in, so that the product is convenient to move.
Further, through bearing and axle and spliced pole fixed plate movable mounting on the mounting panel, be fixed with the spliced pole on the spliced pole fixed plate, through the tail end swing joint of axle and third cylinder on the mounting panel, install the axle sleeve on the telescopic link of third cylinder, axle sleeve and the axle swing joint of spliced pole fixed plate lower extreme.
The angle of spliced pole can carry out rotary operation under the drive of third cylinder, is convenient for rotate the product that is located at the spliced pole top, satisfies the adjustment demand of different shape products.
Further, the lower extreme of mounting panel is fixed with the guide arm that passes mounting base, and the lower extreme of guide arm is fixed with the stopper through the clamp, and mounting base's outside is fixed with the limit baffle of "L" form, installs spacing baffle on the limit baffle, and the lower extreme of spacing baffle can be with the stopper contact.
The maximum moving distance of the mounting plate is limited by the matched use of the limiting block arranged on the guide rod and the limiting stop post arranged on the mounting base.
Further, install between slide grillage and the manipulator and lay the board, lay one side of board and be fixed with the waste material cylinder, the telescopic link tip and the push pedal fixed connection of waste material cylinder, the push pedal can be with the waste product jar propelling movement to slide grillage on.
The laying plate is a supporting platform for temporarily storing products, the products after filling are monitored through other detection equipment, unqualified products are pushed onto the sliding plate frame by the pushing plate, and defective products are discharged.
Further, a second sliding table cylinder is arranged on a support on the other side of the placing plate, two groups of first clamping cylinders and second clamping cylinders which are arranged front and back are arranged on a sliding block of the second sliding table cylinder through an adapter plate, and telescopic rods of the first clamping cylinders and the second clamping cylinders drive clamping rods fixed on the inner sides of clamping plates to move, and the clamping rods are used for clamping side walls of products.
And transferring qualified products to a later processing station by matching the second slipway cylinder with the first clamping cylinder and the second clamping cylinder.
Further, the middle part of the frame provided with the second sliding table cylinder is provided with a heating bin, the upper end of the frame is fixedly provided with a lifting cylinder through a mounting plate, and the lifting cylinder can drive the lifting plate to extend into the heating bin.
The outer wall of the conveyed product is wrapped with a packaged film, the product is driven to enter the heating bin through the lifting cylinder, and the shrinkage of the film is completed through heating, so that the external packaging of the product is completed.
Further, a push plate cylinder is arranged at the lower end of the transfer frame and can push products from the transfer frame to a transfer mechanism positioned at the joint of the transfer frame and the feeding frame.
The product is pushed by the push plate cylinder, so that the product enters a transfer mechanism between the transfer frame and the feeding frame, and the transfer operation of the product is completed.
By means of the scheme, the invention has at least the following advantages:
1. The conveying line formed by splicing the four groups of conveying parts effectively reduces the requirement on the length of a workshop, filling or other auxiliary equipment can be arranged in the space formed in the middle of the conveying line, and the utilization rate of the area in the workshop is effectively improved;
2. the transfer mechanism is used for transferring the product from one bracket to another bracket, and continuous conveying operation can be carried out among a plurality of brackets;
3. The top end of the transfer mechanism is rotatable and is used for adjusting the relative angle of the product, so that the uniformity of later-stage packaging is facilitated;
4. the defective products can be discharged by assisting with other detection equipment;
5. the heating bin is arranged, so that the packaging film covered by the product can be subjected to heat shrinkage packaging operation;
6. The multiple groups of conveying parts run simultaneously, so that the overall transportation efficiency of the products is greatly improved.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate a certain embodiment of the present invention and therefore should not be considered as limiting the scope, and that other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a conveying section according to the present invention;
FIG. 2 is an enlarged schematic view of the area A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of the transfer mechanism of the present invention;
FIG. 4 is an enlarged schematic view of the area B of FIG. 3 in accordance with the present invention;
FIG. 5 is an enlarged schematic view of region C of FIG. 3 in accordance with the present invention;
FIG. 6 is a schematic view of the structure of the skid, robot and the position of the connecting transfer rack of the present invention;
FIG. 7 is an enlarged schematic view of region D of FIG. 1 in accordance with the present invention;
FIG. 8 is a schematic view of the four-group conveyor of the present invention after assembly;
In the figure, 1, a slide plate frame, 2, a transfer frame, 3, a feeding frame, 4, a manipulator, 5, a discharging frame, 6, a first limit cylinder group, 7, a second limit cylinder group, 8, a pressing plate, 9, a cylinder mounting seat, 10, a supporting plate, 11, a first cylinder, 12, a mounting base, 13, a connecting frame, 14, a fixing frame, 15, a first slide plate cylinder, 16, a slide seat, 17, a transfer frame, 18, a bidirectional cylinder, 19, a guide plate, 20, a non-slip plate, 21, a mounting plate, 22, a connecting column, 23, a supporting seat, 24, a baffle rod, 25, a guide roller, 26, a mounting frame, 27, a connecting column fixing plate, 28, a third cylinder, 29, a shaft sleeve, 30, a guide rod, 31, a limit block, 32, a limit baffle plate, 33, a limit baffle column, 34, a placing plate, 35, a waste cylinder, 36, a push plate, 37, a second slide plate cylinder, 38, a first clamping cylinder, 39, a second clamping cylinder, 40, a clamping plate, 41, a clamping rod, 42, a heating bin, 43, a lifting plate, 44, a lifting plate, 45 and a push plate.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Referring to fig. 1 and 8, the conveyor line for the lactose finished product after filling is composed of four groups of conveying parts in fig. 1, and a rectangular structure is formed after splicing, so that the lactose finished product can be placed in a relatively small workshop, the utilization rate of the workshop is improved, filling equipment can be configured in the inner area of the conveyor line, the filled product is conveyed to the vicinity of the manipulator 4, and the manipulator 4 can conveniently perform grabbing operation;
the mechanical arm 4 can convey defective products to the slide plate frame 1, the slide plate frame 1 is inclined, and the defective products can slide into the waste collection box under the influence of gravity and can be recovered and reprocessed;
The mechanical arm 4 can move the products to the transfer frame 2 after grabbing, the transfer frame 2 is inclined, under the influence of gravity, the finished products can slide to the bottom of the transfer frame 2, the bottom of the transfer frame 2 is in butt joint with the feeding frame 3, the feeding frame 3 is of a conventional conveying belt structure, the finished products can be transferred to the position of the discharging frame 5, the finished products are continuously conveyed at the upper rear end of the discharging frame 5, the finished products are pushed and extruded each other, the finished products move to the tail end of the discharging frame 5, and a manual/mechanical arm can be arranged outside the discharging frame 5 to carry and pack the finished products;
in order to facilitate the movement of the finished product, the sliding plate frame 1, the transferring frame 2 and the discharging frame 5 are provided with rollers which are orderly arranged, so that the movement of the product is facilitated;
The limiting mechanisms are arranged in the middle of the transfer frame 2 and the discharging frame 5, and can limit the movement of the finished product, so that sectional and batch conveying of the products is realized.
Referring to fig. 2, the limiting mechanism is composed of a first limiting cylinder group 6 and a second limiting cylinder group 7, and the first limiting cylinder group 6 is arranged on the upper side of the second limiting cylinder group 7;
When a first product on the transfer frame 2 is transferred, the first product is firstly contacted with the first limiting cylinder group 6, when a second product at the rear end of the transfer frame 2 needs to enter, the cylinder of the first limiting cylinder group 6 drives the limiting head to be expanded outwards, the first product is transferred between the first limiting cylinder group 6 and the second limiting cylinder group 7, the second product is contacted with the reset first limiting cylinder group 6, when a third product needs to enter the transfer frame 2, the second limiting cylinder group 7 is firstly opened, the first product is separated from the second limiting cylinder group 7, then the second limiting cylinder group 7 is reset, the first limiting cylinder group 6 is opened, the second product enters between the first limiting cylinder group 6 and the second limiting cylinder group 7, then the first limiting cylinder group 6 is reset, the third product enters the transfer frame 2, then the third product is contacted with the first limiting cylinder group 6, and intermittent sliding products can be realized through repeated circulation operation;
When the products are transferred onto the discharging frame 5, the rear end continuously conveys the products, at the moment, the first limiting cylinder group 6 and the second limiting cylinder group 7 are both in an open state, the products are continuously conveyed, the products are pushed and spread on the whole discharging frame 5 through extrusion among the products, when the end products of the discharging frame 5 are in a state of being not processed, the second limiting cylinder group 7 is reset to block the input of the rear end products, and when the machine is required to be stopped for maintenance, the first limiting cylinder group 6 and the second limiting cylinder group 7 are reset to limit the products at the tail end of the discharging frame 5 to slide down, so that the collection of the tail end products is facilitated;
The relative positions of the first limiting cylinder group 6 and the second limiting cylinder group 7 are adjustable, and the first limiting cylinder group and the second limiting cylinder group can be fixed at any position of the cylinder mounting seat 9 through bolts and nuts so as to meet the mounting requirements of products with different sizes;
The telescopic rod ends of the first limiting cylinder group 6 and the second limiting cylinder group 7 are provided with conical limiting heads, so that products can be quickly and effectively separated and attached;
the two cylinders of the second limiting cylinder group 7 are assembled in a clamping angle shape, so that a certain guiding limit can be provided for the product;
The pressing plate 8 fixed at the upper ends of the first limiting cylinder group 6 and the second limiting cylinder group 7 is used for limiting the height of a product, and is also used for assisting in connecting and fixing between the two cylinders of the first limiting cylinder group 6 and the second limiting cylinder group 7, so that the structure of the mounted cylinders is stable.
Referring to fig. 1 and 3, the connection parts of the transfer frame 2 and the feeding frame 3, and the connection parts of the feeding frame 3 and the discharging frame 5 are all provided with transfer mechanisms for assisting the movement of products, so that the products can be transferred from one mechanism to the other mechanism;
The first cylinder 11 of the transfer mechanism is fixedly connected with the supporting plate 10, the supporting plate 10 is placed on a foundation, the mounting base 12 at the top end of the first cylinder 11 is fixedly connected with the connecting frame 13, the supporting fixing frame 14 is mounted on the connecting frame 13, the first sliding table cylinder 15 for driving the product to translate is arranged on the fixing frame 14, when the product moves to a clamping area, the first sliding table cylinder 15 drives the sliding seat 16 and the bidirectional cylinder 18 mounted on the sliding seat 16 to move to the upper side of the product, at the moment, the guide plates 19 at the two ends of the bidirectional cylinder 18 are positioned at the two sides of the product, the bidirectional cylinder 18 drives the guide plates 19 to move inwards, the anti-skid blocks 20 mounted at the lower ends of four groups of connecting columns on the guide plates 19 are in contact with the side walls of the product, the product can be clamped through the four anti-skid blocks 20, after the product is clamped and fixed, the first sliding table cylinder 15 is started to drive the product to move, and finally the product moves to the top end of the connecting column 22 to finish the preliminary movement of the product, and the connecting column 22 can move up and down in the through holes in the middle of the supporting seat 23 so that the product can be placed on the supporting seat 23.
Referring to fig. 4, there are a plurality of rotating rollers at the top end of the connecting column 22, which are used for supporting and moving the product, and a bar 24 disposed on the supporting seat 23 can provide a certain limit for the product, because the rotating roller group at the top end of the connecting column 22 is installed in a tangential manner, the product can slide towards a lower side after being placed, the bar 24 can be used for limiting, the bar 24 is lower in height, the upper edge only needs to slightly exceed the lowest rotating roller, and meanwhile, the upper end of the bar 24 is lower than the height of a front end product conveying mechanism, so that the bar 24 can not interfere with the front end conveyed product when the first sliding table cylinder 15 drives the product to move.
The guide roller 25 is also arranged on the supporting seat 23, the guide roller 25 is connected with the tail end of the support to be conveyed, so that products can slide out conveniently, the guide roller 25 is arranged through the shaft and the mounting frame 26, and free rotation of the guide roller 25 is ensured.
Referring to fig. 5, when necessary, the product on the connecting post 22 is required to be angularly adjusted, the connecting post 22 is mounted on the connecting post fixing plate 27, the connecting post fixing plate 27 is mounted on the mounting plate 21 through a shaft and a bearing, when the connecting post 22 needs to be rotated, only the third cylinder 28 is required to be started, and the shaft sleeve 29 at the end of the telescopic rod of the third cylinder 28 is matched with the shaft at the lower end of the connecting post fixing plate 27, so that the connecting post fixing plate 27 can be driven to rotate, and finally the rotation operation of the connecting post 22 is completed.
The first cylinder 11 is fixedly connected with the mounting plate 21, and the first cylinder 11 can drive all mechanisms fixed on the mounting plate 21 to perform lifting operation.
When the first cylinder 11 moves up, the height of the rotating roller on the connecting column 22 exceeds the upper edge of the baffle rod 24, and is equal to the height of the mechanism for conveying the product at the rear end, so that the product can be conveniently received, after the product is received, the first cylinder 11 can reset to drive the mounting plate 21 to move down, and finally the height of the rotating roller on the connecting column 22 is lower than the upper edge of the baffle rod 24, and the baffle rod 24 is utilized to provide limit support for the rear end of the product.
In order to avoid the situation that the telescopic rod of the first cylinder 11 excessively stretches out due to failure or faults of the first cylinder 11, a guide rod 30 penetrating through the mounting base 12 is fixed at the lower end of the mounting plate 21, limiting blocks 31 are mounted at the tail ends of the guide rod 30 through the structure of a clamp, limiting baffle plates 32 on two sides of the mounting base 12 are provided with limiting baffle columns 33, and the maximum telescopic length of the first cylinder 11 can be limited under the cooperation of the limiting baffle columns 33 and the limiting blocks 31, so that the limiting protection function is achieved.
Referring to fig. 6, a placement plate 34 between a slide plate frame 1 and a manipulator 4 is used for placing products filled at the front end, a detection mechanism for weighing is arranged before the placement plate 34 is placed, a tank body with unqualified weighing is marked as a defective product, the tank body after weighing is placed on the placement plate 34 for the first time, whether the tank body is a qualified product or not is known through an industrial computer PLC, when the tank body on the placement plate 34 is judged to be the defective product, a waste air cylinder 35 is started, a push plate 36 at the end part of the waste air cylinder is driven to move, the defective product is pushed onto the slide plate frame 1, the gravity of the product itself is utilized to slide on the slide plate frame 1, and finally the tank body falls into a recovery box, so that the later recycling is facilitated.
The second slipway cylinder 37 is fixed on the bracket for fixing the placing plate 34, the first clamping cylinder 38 and the second clamping cylinder 39 are arranged on the second slipway cylinder 37, the clamping plates 40 and the clamping rods 41 are arranged on the telescopic rods of the first clamping cylinder 38 and the second clamping cylinder 39, the first clamping cylinder 38 and the second clamping cylinder 39 can clamp the outer wall of a product through the clamping rods 41 during operation, and the anti-slip blocks are arranged at the lower end of the clamping rods 41, so that the clamping operation on the product can be assisted.
There is the heating storehouse 42 in the frame of installation second slip table jar 37, has the calandria that heats usefulness in the heating storehouse 42, is the mechanism parcel through the front end on the outer wall of product has the tectorial membrane, and the tectorial membrane is after placing in the heating storehouse 42, and the tectorial membrane pyrocondensation warp, wraps up on the product outer wall completely, accomplishes the packing of extranal packing.
The lifting plate 44 is driven to move up and down by the lifting air cylinder 43, so that the product wrapped with the covering film can be stretched into the heating bin 42.
Referring to fig. 7, a push plate cylinder 45 is arranged at the lower end of the transfer frame 2, and the push plate cylinder 45 can push forward the product sliding to the bottom end of the transfer frame 2, so that the product enters a transfer mechanism at the joint of the transfer frame 2 and the feeding frame 3, thereby facilitating continuous transfer and pushing.
The working principle of the invention is as follows:
after the lactose finished product is filled, the conveying line is used, firstly, the filling operation of the product is finished on other equipment, the product is weighed through the weighing equipment, the weighed product can be recorded as a product/defective product, the weighed product is placed on the placing plate 34 at the first time, after the product is recorded to be placed, the first clamping cylinder 38 is driven to clamp the product through the second sliding table cylinder 37, when the product recorded as the defective product is placed on the placing plate 34, the waste cylinder 35 is started, the defective product is pushed onto the sliding plate frame 1, and the defective product slides into a recovery box at the rear end of the sliding plate frame 1 under the influence of the weight of the defective product.
The first clamping cylinder 38 drives the qualified product to move onto the lifting plate 44, the lifting plate 44 drives the product to sink into the heating bin 42 to heat the product, the film covering operation of the product external package is completed, the lifting plate 44 is reset after the film covering operation is completed, the product is clamped by the second clamping cylinder 39, at the moment, the first clamping cylinder 38 also synchronously clamps the subsequent product, the second sliding table cylinder 37 moves, and the subsequent product is sent onto the lifting plate 44 when the first product moves out of the lifting plate 44.
When the product enters the transfer frame 2, the product slides on the inclined transfer frame 2 under the action of gravity and finally slides to the bottom of the transfer frame 2, and at the moment, the product is directly pushed onto a transfer mechanism through a push plate cylinder 45, and is transferred onto a feeding frame 3 through the action of the transfer mechanism, and the feeding frame 3 is a conventional conveying belt and used for supporting the product and conveying the product.
Another transfer mechanism is arranged between the feeding frame 3 and the discharging frame 5, products are finally transferred to the discharging frame 5, and workers/mechanical arms can be arranged on the outer side of the discharging frame 5 to grasp the products, so that final split charging operation is conveniently completed.
In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, where "up," "down," "left," "right," etc. are merely used to indicate relative positional relationships, and when the absolute position of an object to be described changes, the relative positional relationships may change;
in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other without conflict;
Finally, the above description is only of a preferred embodiment of the present invention and is not intended to limit the invention, it being understood that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.