Multilayer corrugated paper and production device and method
阅读说明：本技术 一种多层瓦楞纸及生产装置和方法 (Multilayer corrugated paper and production device and method ) 是由 张永林 梁建 周海根 殷召伟 于 2019-08-28 设计创作，主要内容包括：本发明公开了一种多层瓦楞纸生产装置,属于纸板生产设备技术领域,所述多层瓦楞纸生产装置包括机体和引导轮,所述机体一端通过支架安装有引导轮,且引导轮共设置有两组,所述机体内腔一端安装有胶箱,所述机体上表面一端焊接有喷管。本发明通过雾化喷嘴可使对胶液的喷涂更加的均匀,从而可有效提升对瓦楞纸板的制作质量,通过散热扇对瓦楞纸板的上表面和下表面同时进行散热,从而使胶快速凝结,通过气泵工作产生气体,并通过管道吹进一号卡槽内,一号卡槽内的气体可吹进瓦楞纸板内腔的瓦楞中,从而可对瓦楞纸板内部进行降温,将进一步的提升胶的冷凝效率,提升对瓦楞纸板的生产效率,使用更加的方便。(The invention discloses a multilayer corrugated paper production device, which belongs to the technical field of paperboard production equipment and comprises a machine body and guide wheels, wherein the guide wheels are arranged at one end of the machine body through a support, two groups of guide wheels are arranged, a rubber box is arranged at one end of the inner cavity of the machine body, and a spray pipe is welded at one end of the upper surface of the machine body. According to the invention, the glue solution can be sprayed more uniformly through the atomizing nozzle, so that the manufacturing quality of the corrugated board can be effectively improved, the upper surface and the lower surface of the corrugated board are simultaneously radiated through the radiating fan, so that the glue is quickly condensed, gas is generated through the work of the air pump and is blown into the first clamping groove through the pipeline, the gas in the first clamping groove can be blown into the corrugations in the inner cavity of the corrugated board, so that the interior of the corrugated board can be cooled, the condensation efficiency of the glue is further improved, the production efficiency of the corrugated board is improved, and the corrugated board is more convenient to use.)
1. The utility model provides a multilayer corrugated paper apparatus for producing which characterized in that: high-efficient apparatus for producing of multilayer corrugated container board includes organism and guide wheel, there are two sets of guide wheels organism one end through the support mounting, and the guide wheel is provided with two sets ofly altogether, the rubber box is installed to organism inner chamber one end, the welding of organism upper surface one end has the spray tube, the welding of spray tube one side has the aircraft bonnet, aircraft bonnet inner chamber one end is installed and is rolled the rubber wheel, and it is provided with two sets ofly to roll the rubber wheel altogether, it installs the motor to roll the rubber wheel bottom, and the power take off end of motor links to each other with the power input end that rolls the rubber wheel, it installs the heat dissipation fan to roll rubber wheel one side, and the heat.
2. A multi-ply corrugated paper making apparatus as set forth in claim 1 wherein: air guide holes are formed in the surfaces of the inner cavities of the first clamping groove and the second clamping groove, and guide wheels are welded on one sides of the air guide holes.
3. A multi-ply corrugated paper making apparatus as set forth in claim 1 wherein: glue the case inner chamber and install the gluey pump, glue the pump and be connected with the spray tube through the rubber tube, spray tube upper surface and lower surface are all inlayed and are had atomizing nozzle, glue case one end welding and have the injecting glue mouth.
4. A multi-ply corrugated paper making apparatus as set forth in claim 1 wherein: an air pump is installed at the other end of the inner cavity of the machine body and is connected with the first clamping groove through a pipeline, and an exhaust pipe is welded on the surface of the other side of the second clamping groove.
5. A multi-ply corrugated paper making apparatus as set forth in claim 1 wherein: the other end surface of the machine body is provided with a switch group, and the current output end of the switch group is connected with the current input ends of the glue pump, the motor, the heat dissipation fan and the air pump.
6. A multi-layer corrugated paper produced by any one of claims 1 to 5, wherein: the double-corrugated-board composite functional layer comprises a functional layer, a double-corrugated-board layer and a second functional layer, wherein the double-corrugated-board layer is compounded between the first functional layer and the second functional layer, the first functional layer comprises a polyester film layer, a face paper layer, a flame-retardant paper layer and a foaming cotton layer, and the second functional layer comprises a foaming cotton layer, a flame-retardant paper layer, a face paper layer and a polyester film layer.
7. The multi-layer corrugated paper of claim 6 wherein: a polyester film layer is adhered to the upper surface of a face paper layer, a flame-retardant paper layer is adhered to the lower surface of the face paper layer, and a foaming cotton layer is fixedly connected with the flame-retardant paper layer.
8. The multi-layer corrugated paper of claim 6 wherein: a second foaming cotton layer is bonded on the upper surface of the second flame-retardant paper layer, a second face paper layer is bonded on the lower surface of the second flame-retardant paper layer, and a second polyester film layer is fixedly connected with the second face paper layer.
9. The multi-layer corrugated paper of claim 6 wherein: the first foaming cotton layer and the second foaming cotton layer are symmetrically adhered to the upper surface and the lower surface of the double corrugated cardboard layer.
10. A production method for producing a compound according to any one of claims 6 to 9, characterized in that: comprises the following steps;
step (1): the first functional layer and the double corrugated paperboard layer respectively pass through the first functional layer and the double corrugated paperboard layer around a guide wheel;
step (2): the first functional layer and the double corrugated paperboard layer respectively pass through the upper part and the lower part of the spray pipe, a C3-L148B type glue pump extracts glue liquid in the inner cavity of the glue box, and the glue liquid is sprayed on the surfaces of the first functional layer and the double corrugated paperboard layer in a mist mode through an atomizing nozzle on the surface of the spray pipe; the first functional layer and the double corrugated paperboard layer extend into the space between the two groups of rolling rubber wheels;
and (3): after glue solution spraying is finished, the grinding rubber wheel is driven to rotate by an ACM602V36 type motor, the grinding rubber wheel can drive the first functional layer and the double corrugated board layers to advance through surface friction when rotating, and the first functional layer and the double corrugated board layers are ground simultaneously, so that the two layers are tightly attached together; producing a semi-finished corrugated board;
and (4): the semi-finished corrugated board is subjected to heat dissipation on the upper surface and the lower surface of the semi-finished corrugated board simultaneously through a 5V-DRGB type heat dissipation fan, so that glue is quickly condensed, and the semi-finished corrugated board is discharged from the hood;
and (5): after the corrugated board in the step (4) is discharged from the hood, the two ends of the corrugated board are clamped into the first clamping groove and the second clamping groove, the corrugated board is fixed through the clamping grooves, meanwhile, gas is generated through the operation of a 1366-T1 type air pump and is blown into the first clamping groove through a pipeline, the gas in the first clamping groove can be blown into the corrugations in the inner cavity of the corrugated board, so that the interior of the corrugated board can be cooled, the condensation efficiency of glue is further improved, and the airflow discharged by the corrugated board can enter the second clamping groove through the air guide holes and is discharged through the exhaust pipe;
and (6): and (5) repeating the processes from the step (1) to the step (5) to produce the corrugated board finished product.
Technical Field
The invention belongs to the technical field of corrugated paper production, and particularly relates to multilayer corrugated paper, and a production device and a production method thereof.
Background
Corrugated board is a multi-layer adhesive body, which is composed of at least one layer of wavy core paper interlayer (commonly called as "hole paper", "corrugated core paper", "corrugated paper core", "corrugated base paper") and one layer of paper board (also called as "box board paper" or "box paper board"). Generally, the corrugated board is divided into a single corrugated board and a double corrugated board according to the size of the corrugated board: A. b, C, E, F five types. The invention and application of the corrugated paper have more than one hundred years history, have low cost, light weight, easy processing, intensity is big, print the advantage such as being good of the adaptability, convenient storage and transport, more than 80% of the corrugated paper can be recycled, the corrugated paper can be used as the packing of food or digital product, relatively environmental protection, use comparatively extensively; it has high mechanical strength and can resist collision and falling in the process of transportation.
The corrugated board can not be cooled and condensed quickly inside the glue solution after the glue solution is used for pasting the corrugated board and the paperboard in the production process, so that the production efficiency of the corrugated board is greatly restricted, and the glue solution is not uniformly coated in the production process, so that the production quality is poor, and the service life is shortened when the glue solution is corroded by external impact force and water solution. Therefore, a multilayer corrugated paper production device is provided, and multilayer corrugated paper with high-strength waterproof buffering is correspondingly produced.
Disclosure of Invention
The invention aims to provide a multilayer corrugated paper production device, which can enable glue solution to be sprayed more uniformly through an atomizing nozzle, so that the manufacturing quality of corrugated paper boards can be effectively improved, the upper surface and the lower surface of the corrugated paper boards are simultaneously radiated through a radiating fan, so that the glue is quickly condensed, gas is generated through the work of an air pump and is blown into a clamping groove through a pipeline, the gas in the clamping groove can be blown into corrugations in the inner cavity of the corrugated paper boards, so that the glue condensation efficiency is further improved, the production efficiency of the corrugated paper boards is improved, and the use is more convenient.
In order to solve the technical problem, the invention aims to realize that:
the utility model provides a multilayer corrugated paper apparatus for producing, multilayer corrugated container board high-efficient apparatus for producing includes organism and guide wheel, there is the guide wheel organism one end through the support mounting, and the guide wheel is provided with two sets ofly altogether, the rubber box is installed to organism inner chamber one end, the welding of organism upper surface one end has the spray tube, the welding of spray tube one side has the aircraft bonnet, aircraft bonnet inner chamber one end is installed and is rolled the rubber wheel, and it is provided with two sets ofly to roll the rubber wheel altogether, it installs the motor to roll the rubber wheel bottom, and the power take off end of motor links to each other with the power input end that rolls the rubber wheel, it installs the heat dissipation fan to roll rubber wheel one side, and.
On the basis of the above scheme and as a preferable scheme of the scheme: air guide holes are formed in the surfaces of the inner cavities of the first clamping groove and the second clamping groove, and guide wheels are welded on one sides of the air guide holes.
On the basis of the above scheme and as a preferable scheme of the scheme: glue the case inner chamber and install the gluey pump, glue the pump and be connected with the spray tube through the rubber tube, spray tube upper surface and lower surface are all inlayed and are had atomizing nozzle, glue case one end welding and have the injecting glue mouth.
On the basis of the above scheme and as a preferable scheme of the scheme: an air pump is installed at the other end of the inner cavity of the machine body and is connected with the first clamping groove through a pipeline, and an exhaust pipe is welded on the surface of the other side of the second clamping groove.
On the basis of the above scheme and as a preferable scheme of the scheme: the other end surface of the machine body is provided with a switch group, and the current output end of the switch group is connected with the current input ends of the glue pump, the motor, the heat dissipation fan and the air pump.
The utility model provides a multilayer corrugated paper of multilayer corrugated paper apparatus for producing, includes a functional layer, two corrugated container board layers and No. two functional layers, and two corrugated container board layer complex is between a functional layer and No. two functional layers, and a functional layer includes a polyester film layer, a face paper layer, a fire-retardant ply and a foaming cotton layer respectively, and No. two functional layers include foaming cotton layer, No. two fire-retardant ply, No. two face paper layers and No. two polyester film layers respectively.
On the basis of the above scheme and as a preferable scheme of the scheme: a polyester film layer is adhered to the upper surface of a face paper layer, a flame-retardant paper layer is adhered to the lower surface of the face paper layer, and a foaming cotton layer is fixedly connected with the flame-retardant paper layer.
On the basis of the above scheme and as a preferable scheme of the scheme: a second foaming cotton layer is bonded on the upper surface of the second flame-retardant paper layer, a second face paper layer is bonded on the lower surface of the second flame-retardant paper layer, and a second polyester film layer is fixedly connected with the second face paper layer.
On the basis of the above scheme and as a preferable scheme of the scheme: the first foaming cotton layer and the second foaming cotton layer are symmetrically adhered to the upper surface and the lower surface of the double corrugated cardboard layer.
A production method for producing multi-layer corrugated paper comprises the following steps;
step (1): the first functional layer and the double corrugated paperboard layer respectively pass through the first functional layer and the double corrugated paperboard layer around a guide wheel;
step (2): the first functional layer and the double corrugated paperboard layer respectively pass through the upper part and the lower part of the spray pipe, a C3-L148B type glue pump extracts glue liquid in the inner cavity of the glue box, and the glue liquid is sprayed on the surfaces of the first functional layer and the double corrugated paperboard layer in a mist mode through an atomizing nozzle on the surface of the spray pipe; the first functional layer and the double corrugated paperboard layer extend into the space between the two groups of rolling rubber wheels;
and (3): after glue solution spraying is finished, the grinding rubber wheel is driven to rotate by an ACM602V36 type motor, the grinding rubber wheel can drive the first functional layer and the double corrugated board layers to advance through surface friction when rotating, and the first functional layer and the double corrugated board layers are ground simultaneously, so that the two layers are tightly attached together; producing a semi-finished corrugated board;
and (4): the semi-finished corrugated board is subjected to heat dissipation on the upper surface and the lower surface of the semi-finished corrugated board simultaneously through a 5V-DRGB type heat dissipation fan, so that glue is quickly condensed, and the semi-finished corrugated board is discharged from the hood;
and (5): after the corrugated board in the step (4) is discharged from the hood, the two ends of the corrugated board are clamped into the first clamping groove and the second clamping groove, the corrugated board is fixed through the clamping grooves, meanwhile, gas is generated through the operation of a 1366-T1 type air pump and is blown into the first clamping groove through a pipeline, the gas in the first clamping groove can be blown into the corrugations in the inner cavity of the corrugated board, so that the interior of the corrugated board can be cooled, the condensation efficiency of glue is further improved, and the airflow discharged by the corrugated board can enter the second clamping groove through the air guide holes and is discharged through the exhaust pipe;
and (6): and (5) repeating the processes from the step (1) to the step (5) to produce the corrugated board finished product.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that:
the production device has the advantages of simple structure, convenient operation and good use effect, the glue solution in the inner cavity of the glue box is extracted by the glue pump, and the glue solution is sprayed on the surfaces of the first functional layer, the double-corrugated paperboard layer and the second functional layer in a mist form by the atomizing nozzle on the surface of the spray pipe, so that the spraying of the glue solution can be more uniform by the atomizing nozzle, and the manufacturing quality of the corrugated paperboard can be effectively improved; the production device of the invention simultaneously dissipates heat of the upper surface and the lower surface of the corrugated board by the heat dissipation fan, thereby rapidly condensing the glue. The production device provided by the invention generates gas through the work of the air pump, and blows the gas into the first clamping groove through the pipeline, and the gas in the first clamping groove can be blown into the corrugations of the inner cavity of the corrugated board, so that the interior of the corrugated board can be cooled, the condensation efficiency of glue is further improved, the production efficiency of the corrugated board is improved, and the use is more convenient.
The first functional layer and the second functional layer are symmetrically bonded on two sides of the double corrugated board layer of the corrugated paper produced by the invention, so that the waterproof buffering performance, the structural strength and the rigidity of the double corrugated board are effectively enhanced, the hardness and the toughness are high, the puncture resistance, the friction resistance, the high temperature resistance, the low temperature resistance, the chemical resistance and the oil resistance are realized, the flame retardant effect is excellent, and the service life is long; the first functional layer comprises a polyester film layer, a face paper layer, a flame-retardant paper layer and a foaming cotton layer respectively, the second functional layer comprises a foaming cotton layer, a flame-retardant paper layer, a face paper layer and a polyester film layer respectively, the polyester film has the advantages of high rigidity, hardness and toughness, puncture resistance, friction resistance, high temperature and low temperature resistance, chemical resistance and oil resistance, the foaming cotton has excellent buffering performance, and the flame-retardant paper has good flame-retardant performance.
Drawings
Fig. 1 is a schematic view of the overall structure of the multilayer corrugated paper production apparatus of the present invention.
Fig. 2 is a schematic view of the upper surface structure of the machine body of the multilayer corrugated paper production device.
Fig. 3 is a schematic view of a card slot structure of the multilayer corrugated paper production device of the invention.
Fig. 4 is a schematic circuit diagram of the multi-layer corrugated paper production apparatus of the present invention.
Fig. 5 is a schematic view of the overall structure of the multi-layer corrugated paper of the present invention.
Fig. 6 is a structural schematic diagram of a first functional layer of the multilayer corrugated paper of the present invention.
Fig. 7 is a schematic structural diagram of a second functional layer of the multilayer corrugated paper of the present invention.
Reference numerals: 1. a body; 101. a guide wheel; 2. a glue box; 201. a glue pump; 202. a nozzle; 203. an atomizing nozzle; 3. a hood; 301. rolling a rubber wheel; 302. a motor; 303. a heat dissipation fan; 4. a first card slot; 401. a second card slot; 402. an air pump; 403. an air vent; 404. a guide wheel; 405. an exhaust pipe; 5. a switch group; 6. a glue injection port; 10. a first functional layer; 20. a double-corrugated paperboard layer; 30. functional layer two; 40. a first polyester film layer; 50. a first face paper layer; 60. a first flame-retardant paper layer; 70. a first foamed cotton layer; 80. a second foaming cotton layer; 90. a second flame-retardant paper layer; 100. a second surface paper layer; 110. a second polyester film layer;
Detailed Description
The invention will be further described in the following with specific embodiments in conjunction with the accompanying drawings;
this embodiment provides a multilayer corrugated paper apparatus for producing, multilayer corrugated container board high efficiency apparatus for producing includes organism 1 and guide wheel 101, there are guide wheel 101 in 1 one end of organism through the support mounting, and guide wheel 101 is provided with two sets ofly altogether, glue box 2 is installed to 1 inner chamber one end of organism, 1 upper surface one end welding of organism has spray tube 202, spray tube 202 one side welding has aircraft bonnet 3, aircraft bonnet 3 inner chamber one end is installed and is rolled rubber tyer 301, and it is provided with two sets ofly to roll rubber tyer 301 altogether, it installs motor 302 to roll rubber tyer 301 bottom, and the power take off end of motor 302 links to each other with the power input end that rolls rubber tyer 301, it installs heat dissipation fan 303 to roll rubber tyer 301 one side, and heat dissipation fan 303 is provided with two sets ofly altogether, organism 1 upper surface other end symmetry is provided with No. 4 draw-in groove and No. 401, switch, The motor 302, the heat dissipation fan 303 and the air pump 402 work, the first functional layer, the double-corrugated paperboard layer and the second functional layer can be simultaneously introduced into the inner cavity of the hood 3 through the guide wheel 101, glue in the inner cavity of the glue box 2 is pumped through the glue pump 201 of C3-L148B, the glue is sprayed on the surfaces of the first functional layer, the double-corrugated paperboard layer and the second functional layer in a fog mode through the atomizing nozzle 203 on the surface of the spray pipe 202, the spraying on the glue can be more uniform through the atomizing nozzle 203, the manufacturing quality of the corrugated paperboard can be effectively improved, after the glue spraying is finished, the rolling rubber wheel 301 is driven to rotate through the motor 302 of ACM602V36 type, the corrugated paperboard can be driven to advance through the friction force of the surface when the rolling rubber wheel 301 rotates, the corrugated paperboard is rolled at the same time, the two boards are tightly adhered together, the upper surface and the lower surface of the corrugated paperboard are simultaneously cooled through the heat dissipation fan 303 of 5V-DRGB type, thereby make glue condense fast, corrugated container board is from the discharge back in the aircraft bonnet 3, corrugated container board both ends card advances in a draw-in groove 4 and No. two draw-in grooves 401, fix corrugated container board through the draw-in groove, simultaneously through 1366-T1 type air pump 402 work production gas, and blow into in a draw-in groove 4 through the pipeline, the gas in a draw-in groove 4 can blow into in the flute of corrugated container board inner chamber, thereby can cool down corrugated container board inside, the condensation efficiency of further promotion glue, promote the production efficiency to corrugated container board, it is more convenient to use, corrugated container board combustion gas accessible air guide hole 403 enters into No. two draw-in grooves 401, and discharge through blast pipe 405.
Referring to fig. 1, 2 and 3, in the apparatus for producing multilayer corrugated paper according to the embodiment of the present invention,
Referring to fig. 1 and 2, in the apparatus for producing multilayer corrugated paper according to the embodiment of the present invention, a
Referring to fig. 1 and 2, an
Referring to fig. 1 and 4, in an embodiment of the present invention, a
The embodiment of the invention provides a multilayer corrugated paper production device which comprises a machine body and two groups of guide wheels, wherein the guide wheels are arranged at one end of the machine body through a support, a rubber box is arranged at one end of the inner cavity of the machine body, and a spray pipe is welded at one end of the upper surface of the machine body. According to the invention, the glue solution can be sprayed more uniformly through the atomizing nozzle, so that the manufacturing quality of the corrugated board can be effectively improved, the upper surface and the lower surface of the corrugated board are simultaneously radiated through the radiating fan, so that the glue is quickly condensed, gas is generated through the work of the air pump and is blown into the first clamping groove through the pipeline, and the gas in the first clamping groove can be blown into the corrugations in the inner cavity of the corrugated board, so that the condensation efficiency of the glue is further improved, the production efficiency of the corrugated board is improved, and the corrugated board is more convenient to use.
A multi-layer corrugated paper produced by a multi-layer corrugated paper production device comprises a first functional layer 10, a double
Referring to fig. 2, the first polyester film layer 40 is adhered to the upper surface of the first face paper layer 50, the first flame-retardant paper layer 60 is adhered to the lower surface of the first face paper layer 50, and the first foam layer 70 is fixedly connected with the first flame-retardant paper layer 60, so that the buffering, flame-retardant and high-strength waterproof performances of the corrugated board are effectively improved, and the service life of the corrugated board is prolonged.
Referring to fig. 3, the
Referring to fig. 1, 2 and 3, a first foam layer 70 and a
The embodiment of the invention provides a high-strength waterproof buffering corrugated board, wherein a first functional layer comprises a first polyester film layer, a first face paper layer, a first flame-retardant paper layer and a first foaming cotton layer respectively, the first polyester film layer is adhered to the upper surface of the first face paper layer, the first flame-retardant paper layer is adhered to the lower surface of the first face paper layer, the first foaming cotton layer is fixedly connected with the first flame-retardant paper layer, a second functional layer comprises a second foaming cotton layer, a second flame-retardant paper layer, a second face paper layer and a second polyester film layer respectively, the second foaming cotton layer is adhered to the upper surface of the second flame-retardant paper layer, the second face paper layer is adhered to the lower surface of the second flame-retardant paper layer, the second polyester film layer is fixedly connected with the second face paper layer, and the polyester film has high rigidity, high hardness and toughness, puncture resistance, friction resistance, high temperature resistance and low temperature resistance, chemical resistance and oil resistance, and excellent buffering performance of foaming cotton, the flame retardant paper has good flame retardant property.
It should be noted that, the
A production method for producing multi-layer corrugated paper comprises the following steps;
step (1): the first functional layer and the double corrugated paperboard layer respectively pass through the first functional layer and the double corrugated paperboard layer around a guide wheel;
step (2): the first functional layer and the double corrugated paperboard layer respectively pass through the upper part and the lower part of the spray pipe, a C3-L148B type glue pump extracts glue liquid in the inner cavity of the glue box, and the glue liquid is sprayed on the surfaces of the first functional layer and the double corrugated paperboard layer in a mist mode through an atomizing nozzle on the surface of the spray pipe; the first functional layer and the double corrugated paperboard layer extend into the space between the two groups of rolling rubber wheels;
and (3): after glue solution spraying is finished, the grinding rubber wheel is driven to rotate by an ACM602V36 type motor, the grinding rubber wheel can drive the first functional layer and the double corrugated board layers to advance through surface friction when rotating, and the first functional layer and the double corrugated board layers are ground simultaneously, so that the two layers are tightly attached together; producing a semi-finished corrugated board;
and (4): the semi-finished corrugated board is subjected to heat dissipation on the upper surface and the lower surface of the semi-finished corrugated board simultaneously through a 5V-DRGB type heat dissipation fan, so that glue is quickly condensed, and the semi-finished corrugated board is discharged from the hood;
and (5): after the corrugated board in the step (4) is discharged from the hood, the two ends of the corrugated board are clamped into the first clamping groove and the second clamping groove, the corrugated board is fixed through the clamping grooves, meanwhile, gas is generated through the operation of a 1366-T1 type air pump and is blown into the first clamping groove through a pipeline, the gas in the first clamping groove can be blown into the corrugations in the inner cavity of the corrugated board, so that the interior of the corrugated board can be cooled, the condensation efficiency of glue is further improved, and the airflow discharged by the corrugated board can enter the second clamping groove through the air guide holes and is discharged through the exhaust pipe;
and (6): and (5) repeating the processes from the step (1) to the step (5) to produce the corrugated board finished product and a functional layer II
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, refer to orientations or positional relationships that are 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 conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience in describing and simplifying the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
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