阅读说明：本技术 一种核发电废料处理装置 (Nuclear power generation waste treatment device ) 是由 王子蓉 于 2019-11-04 设计创作，主要内容包括：本发明涉及核发电领域,尤其是一种核发电废料处理装置,包括机身以及设置于所述机身内前后贯通的转动腔,所述转动腔底壁内设置有用于放置核废料的操作腔以及位于所述废料腔左侧用于放置密封桶的操作腔,所述转动腔内可转动的设置有转动架,所述转动架下方设置有高低错位的电磁铁与第一带轮,本发明提供的一种核发电废料处理装置,能够对核发电后的核废料进行密封处理,设备利用隔绝水泥对核废料进行浇灌,然后通过焊接进行容器的方式对核废料进行再次密封,使密封程度更高隔绝核泄漏,设备自动化程度高,进行将核废料及其隔绝容器置于设备内固定位置,设备能够自动进行密封操作,更加便利安全。(The invention relates to the field of nuclear power generation, in particular to a nuclear power generation waste treatment device which comprises a machine body and a rotating cavity which is arranged in the machine body and runs through from front to back, wherein an operating cavity for placing nuclear waste and an operating cavity which is positioned on the left side of the waste cavity and used for placing a sealing barrel are arranged in the bottom wall of the rotating cavity, a rotating frame is rotatably arranged in the rotating cavity, and electromagnets and a first belt pulley which are staggered in height are arranged below the rotating frame. More convenient and safer.)

1. The utility model provides a nuclear power generation waste material processing apparatus, includes the fuselage and set up in the rotation chamber that link up around in the fuselage, its characterized in that: an operation cavity for placing nuclear waste and an operation cavity for placing a sealing barrel are arranged in the bottom wall of the rotation cavity, the operation cavity is positioned on the left side of the waste cavity, a rotating frame is rotatably arranged in the rotation cavity, an electromagnet and a first belt wheel which are staggered in height are arranged below the rotating frame, a pull wire is arranged between the electromagnet and the first belt wheel and penetrates through a winding wheel cavity arranged in the rotating frame, the pull wire in the winding wheel cavity is wound on the outer surface of a winding wheel which is rotatably arranged in the winding wheel cavity, the winding wheel is fixedly arranged on a first motor output shaft which is fixedly arranged in the rear side end wall of the winding wheel cavity, after the electric clamping jaws clamp the nuclear waste, the first motor is started to drive the winding wheel to rotate forwards, so that the electric clamping jaws are driven to move upwards to lift the nuclear waste, the electromagnet moves downwards to adsorb a sealing cover arranged at the top of the sealing cover, starting a rotating device arranged in the top wall of the rotating cavity to drive the rotating frame to rotate for half a circle, so as to drive the sealing cover and the nuclear waste to exchange positions, and starting the first motor to drive the reel to rotate reversely to place the nuclear waste into the inner cavity of the sealing barrel;

the operation cavity is rotatably provided with a rotating gear ring for supporting the sealing barrel, a lifting device arranged in the bottom wall of the operation cavity drives the rotating gear ring to move upwards so as to drive the sealing barrel to move upwards, the nuclear waste is located in the center of the inner cavity of the sealing barrel after the sealing barrel moves upwards, the lifting device drives a blending device arranged on the left side of the machine body to blend isolated cement contained in a blending cavity with an upward opening in the top wall of the machine body, and when the rotating gear ring moves upwards to the top, the isolated cement in the blending cavity is poured into the inner cavity of the sealing barrel to wrap the nuclear waste, so that the radiation isolation of the nuclear waste is realized;

and a welding device is arranged in the right side end wall of the operation cavity, when the sealing cover is buckled above the sealing barrel again, the welding device starts a welding machine arranged in the right side end wall of the operation cavity to weld the sealing cover with the sealing barrel, and meanwhile, the welding device drives the sealing barrel to rotate during welding, so that the complete sealing and isolation of the nuclear waste are realized.

2. The nuclear power generation waste disposal apparatus of claim 1, wherein: rotating device includes be provided with first belt chamber in the rotation chamber roof, first belt chamber with rotate between the chamber rotate be provided with rotating turret fixed connection's first pivot, first belt intracavity first pivot end is fixed and is provided with the second band pulley, first belt chamber with it is provided with the second pivot to rotate between the gear chamber that sets up in the fuselage diapire, first belt intracavity the terminal fixed first band pulley that is provided with of second pivot, first band pulley with connect by first belt transmission cooperation between the first belt chamber, gear intracavity the terminal fixed first gear that is provided with of second pivot.

3. The nuclear power generation waste disposal apparatus of claim 1, wherein: the lifting device comprises a rotating cavity and a rotating cylinder which is arranged between the gear cavities in a rotating mode, a threaded hole which is communicated from top to bottom is formed in the rotating cylinder, the tail end of the threaded hole is connected with a threaded rod in the bottom wall of the rotating gear ring in a rotating mode, a square hole with a downward opening is formed in the bottom wall of the threaded rod, and a square rod which is fixedly connected with the wall body of the machine body is slidably arranged in the square hole.

4. The nuclear power generation waste disposal apparatus of claim 3, wherein: the gear cavity roof is internally provided with a sliding cavity with a downward opening, the sliding cavity is internally provided with a sliding block in a sliding mode, the sliding block bottom wall is internally and fixedly provided with a second motor, the tail end of an output shaft of the second motor is fixedly provided with a second gear meshed with a first gear fixedly arranged at the bottom end, the second gear is matched with a third gear fixedly arranged on the outer surface of the rotating cylinder, and an electric push rod capable of driving the sliding block to move is arranged in the end wall of the right side of the sliding cavity.

5. The nuclear power generation waste disposal apparatus of claim 1, wherein: the mixing device comprises a second belt cavity which is arranged in the bottom wall of the operation cavity and extends leftwards, a mixing shaft is arranged between the second belt cavity and the mixing cavity in a rotating mode, stirring paddles are uniformly distributed on the outer surface of the mixing shaft in the mixing cavity, a third belt wheel is fixedly arranged at the tail end of the mixing shaft in the second belt cavity, the third belt wheel is connected with a fourth belt wheel fixedly arranged on the outer surface of the rotating cylinder in a matching mode through a second belt, a discharging opening for discharging is formed in the end wall of the right side of the mixing cavity, a first sliding groove with an upward opening is formed in the bottom wall of the discharging opening, a first sliding rod is slidably arranged in the first sliding groove, a spring is arranged between the first sliding rod and the bottom wall of the first sliding groove, a right-and-left through inclined hole is formed in the first sliding rod, a second sliding groove which penetrates through the first sliding groove is formed in the end wall of the left side of the operation, a second sliding rod is slidably arranged in the second sliding groove, and a reset device for driving the second sliding rod to reset is arranged between the second sliding rod and the end wall of the second sliding groove.

6. The nuclear power generation waste disposal apparatus of claim 1, wherein: the welding device comprises a transmission cavity with a leftward opening, which is arranged in the end wall of the right side of the operation cavity, a third motor is fixedly arranged in the top wall of the transmission cavity, and a fourth gear meshed with the rotating gear ring is fixedly arranged at the tail end of an output shaft of the third motor.

Technical Field

The invention relates to the field of nuclear power generation, in particular to a nuclear power generation waste treatment device.

Background

With the popularization of nuclear power generation application, nuclear waste materials are increased, a plurality of problems exist in nuclear waste material treatment, especially when the nuclear waste materials are sealed and isolated, the traditional manual operation is very troublesome, and the nuclear waste materials are contacted for a long time, so that the radiation danger exists, and therefore, a nuclear power generation waste material treatment device is needed to be arranged to improve the problems.

Disclosure of Invention

The invention aims to provide a nuclear power generation waste treatment device which can overcome the defects in the prior art, so that the practicability of equipment is improved.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention discloses a nuclear power generation waste treatment device, which comprises a machine body and a rotating cavity which is arranged in the machine body and runs through from front to back, wherein an operating cavity for placing nuclear waste and an operating cavity which is positioned at the left side of the waste cavity and is used for placing a sealing barrel are arranged in the bottom wall of the rotating cavity, a rotating frame is rotatably arranged in the rotating cavity, an electromagnet and a first belt pulley which are staggered in height are arranged below the rotating frame, a pull wire is arranged between the electromagnet and the first belt pulley, the pull wire runs through a wheel winding cavity arranged in the rotating frame, the pull wire in the wheel winding cavity is wound on the outer surface of a reel which is rotatably arranged in the wheel winding cavity, the reel is fixedly arranged on a first motor output shaft fixedly arranged in the rear side end wall of the wheel winding cavity, and after the nuclear waste is clamped by an electric clamping jaw, a first motor is started to drive the, when the electric clamping jaws are driven to move upwards to lift the nuclear waste, the electromagnet moves downwards to adsorb a sealing cover arranged at the top of the sealing cover, at the moment, a rotating device arranged in the top wall of the rotating cavity is started to drive the rotating frame to rotate for half a circle, so that the position of the sealing cover and the nuclear waste is driven to be exchanged, and at the moment, the first motor is started to drive the reel to rotate reversely to place the nuclear waste into the inner cavity of the sealing barrel;

the operation cavity is rotatably provided with a rotating gear ring for supporting the sealing barrel, a lifting device arranged in the bottom wall of the operation cavity drives the rotating gear ring to move upwards so as to drive the sealing barrel to move upwards, the nuclear waste is located in the center of the inner cavity of the sealing barrel after the sealing barrel moves upwards, the lifting device drives a blending device arranged on the left side of the machine body to blend isolated cement contained in a blending cavity with an upward opening in the top wall of the machine body, and when the rotating gear ring moves upwards to the top, the isolated cement in the blending cavity is poured into the inner cavity of the sealing barrel to wrap the nuclear waste, so that the radiation isolation of the nuclear waste is realized;

and a welding device is arranged in the right side end wall of the operation cavity, when the sealing cover is buckled above the sealing barrel again, the welding device starts a welding machine arranged in the right side end wall of the operation cavity to weld the sealing cover with the sealing barrel, and meanwhile, the welding device drives the sealing barrel to rotate during welding, so that the complete sealing and isolation of the nuclear waste are realized.

Further, rotating device includes be provided with first belt chamber in the rotation chamber roof, first belt chamber with rotate between the chamber rotate be provided with rotating turret fixed connection's first pivot, first belt intracavity first pivot end is fixed and is provided with the second band pulley, first belt chamber with it is provided with the second pivot to rotate between the gear chamber that sets up in the fuselage diapire, first belt intracavity the end of second pivot is fixed and is provided with first band pulley, first band pulley with be connected by first belt transmission cooperation between the first belt chamber, gear intracavity the end of second pivot is fixed and is provided with first gear.

Further, hoisting device include rotate the chamber with it is provided with the rotary drum to rotate between the gear chamber, be provided with the screw hole that link up from top to bottom in the rotary drum, screw hole female connection have the end rotate set up in rotate the threaded rod in the ring gear diapire, be provided with the square hole that the opening is decurrent in the threaded rod diapire, slidable in the square hole be provided with fuselage wall body fixed connection's square pole.

Furthermore, a sliding cavity with a downward opening is arranged in the top wall of the gear cavity, a sliding block is slidably arranged in the sliding cavity, a second motor is fixedly arranged in the bottom wall of the sliding block, a second gear meshed with a first gear fixedly arranged at the tail end of the bottom of an output shaft of the second motor is fixedly arranged at the tail end of the output shaft of the second motor, the second gear is matched with a third gear fixedly arranged on the outer surface of the rotating cylinder, and an electric push rod capable of driving the sliding block to move is arranged in the end wall of the right side of the sliding cavity.

Further, the blending device comprises a second belt cavity which is arranged in the bottom wall of the operation cavity and extends leftwards, a stirring shaft is rotatably arranged between the second belt cavity and the blending cavity, stirring paddles are uniformly distributed on the outer surface of the stirring shaft in the blending cavity, a third belt wheel is fixedly arranged at the tail end of the stirring shaft in the second belt cavity, the third belt wheel is connected with a fourth belt wheel fixedly arranged on the outer surface of the rotating cylinder in a transmission fit manner through a second belt, a discharging opening for discharging is arranged in the end wall of the right side of the blending cavity, a first sliding groove with an upward opening is arranged in the bottom wall of the discharging opening, a first sliding rod is slidably arranged in the first sliding groove, a spring is arranged between the first sliding rod and the bottom wall of the first sliding groove, a right-and-left through inclined hole is arranged in the first sliding rod, a second sliding groove which runs through the first sliding groove is arranged in the end wall of the left side of the operation cavity, a second sliding rod is slidably arranged in the second sliding groove, and a reset device for driving the second sliding rod to reset is arranged between the second sliding rod and the end wall of the second sliding groove.

Furthermore, the welding device comprises a transmission cavity with a leftward opening, which is arranged in the end wall of the right side of the operation cavity, a third motor is fixedly arranged in the top wall of the transmission cavity, and a fourth gear meshed with the rotary gear ring is fixedly arranged at the tail end of an output shaft of the third motor.

The invention has the beneficial effects that: the nuclear power generation waste treatment device provided by the invention can be used for sealing nuclear waste after nuclear power generation, the nuclear waste is irrigated by the device by using isolation cement, and then the nuclear waste is sealed again by welding a container, so that nuclear leakage is isolated to a higher degree of sealing, the automation degree of the device is high, the nuclear waste and the isolation container are placed at fixed positions in the device, and the device can be automatically sealed, so that the device is more convenient and safer.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the overall structure of a nuclear power generation waste disposal apparatus according to the present invention.

Fig. 2 is a schematic view of the structure a-a in fig. 1.

Fig. 3 is an enlarged schematic view of B in fig. 1.

Fig. 4 is an enlarged schematic view of C in fig. 1.

Detailed Description

The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.

The nuclear power generation waste disposal apparatus described with reference to fig. 1-4 includes a body 10 and a rotation chamber 11 disposed in the body 10 and penetrating forward and backward, an operation chamber 28 for disposing nuclear waste 43 and an operation chamber 28 disposed on the left side of the waste chamber 42 and for disposing a sealing barrel 47 are disposed in the bottom wall of the rotation chamber 11, a rotation frame 19 is rotatably disposed in the rotation chamber 11, an electromagnet 18 and a first pulley 14 which are staggered in height are disposed below the rotation frame 19, a pull wire 48 is disposed between the electromagnet 18 and the first pulley 14, the pull wire 48 penetrates a winding chamber 52 disposed in the rotation frame 19, the pull wire 48 in the winding chamber 52 is wound on the outer surface of a winding wheel 51 rotatably disposed in the winding chamber 52, the winding wheel 51 is fixedly disposed on the output shaft of a first motor 53 fixedly disposed in the rear end wall of the winding chamber 52, after the nuclear waste 43 is clamped by the electric claw 44, the first motor 53 is started to drive the reel 51 to rotate forwards, so as to drive the electric claw 44 to move upwards to lift the nuclear waste 43, the electromagnet 18 moves downwards to adsorb the sealing cover 46 arranged at the top of the sealing cover 46, at the moment, the rotating device 99 arranged in the top wall of the rotating cavity 11 is started to drive the rotating frame 19 to rotate for half a circle, so as to drive the sealing cover 46 and the nuclear waste 43 to exchange positions, at the moment, the first motor 53 is started to drive the reel 51 to rotate backwards to place the nuclear waste 43 into the inner cavity of the sealing barrel 47;

the operation cavity 28 is internally rotatably provided with a rotating gear ring 54 for supporting the sealing barrel 47, the lifting device 98 arranged in the bottom wall of the operation cavity 28 drives the rotating gear ring 54 to move upwards so as to drive the sealing barrel 47 to move upwards, the nuclear waste 43 is positioned in the center of the inner cavity of the sealing barrel 47 after the sealing barrel 47 moves upwards, the lifting device 98 drives the blending device 97 arranged on the left side of the machine body 10 to blend isolated cement contained in the blending cavity 24 with an upward opening in the top wall of the machine body 10, and when the rotating gear ring 54 moves upwards to the uppermost direction, isolated cement in the blending cavity 24 is poured into the inner cavity of the sealing barrel 47 to wrap the nuclear waste 43, so that radiation isolation of the nuclear waste 43 is realized;

a welding device 96 is arranged in the right end wall of the operation cavity 28, when the sealing cover 46 is buckled above the sealing barrel 47 again, the welding device 96 starts a welding machine 45 arranged in the right end wall of the operation cavity 28 to weld the sealing cover 46 and the sealing barrel 47, and meanwhile, the welding device 96 drives the sealing barrel 47 to rotate during welding, so that complete sealing and isolation of the nuclear waste 43 are realized.

Beneficially, the rotating device 99 includes a first belt cavity 13 disposed in the top wall of the rotating cavity 11, a first rotating shaft 17 fixedly connected to the rotating frame 19 is rotatably disposed between the first belt cavity 13 and the rotating cavity 11, a second belt pulley 16 is fixedly disposed at the end of the first rotating shaft 17 in the first belt cavity 13, a second rotating shaft 12 is rotatably disposed between the first belt cavity 13 and a gear cavity 38 disposed in the bottom wall of the machine body 10, a first belt pulley 14 is fixedly disposed at the end of the second rotating shaft 12 in the first belt cavity 13, the first belt pulley 14 is in transmission fit connection with the first belt cavity 13 through a first belt 15, and a first gear 39 is fixedly disposed at the end of the second rotating shaft 12 in the gear cavity 38.

Beneficially, the lifting device 98 includes a rotating cylinder 56 rotatably disposed between the rotating cavity 11 and the gear cavity 38, a threaded hole 58 penetrating up and down is disposed in the rotating cylinder 56, a threaded rod 59 whose end is rotatably disposed in the bottom wall of the rotating ring gear 54 is threadedly connected to the threaded hole 58, a square hole 61 with a downward opening is disposed in the bottom wall of the threaded rod 59, and a square rod 60 fixedly connected with the wall body of the body 10 is slidably disposed in the square hole 61.

Advantageously, a sliding cavity 33 with a downward opening is arranged in the top wall of the gear cavity 38, a sliding block 35 is slidably arranged in the sliding cavity 33, a second motor 34 is fixedly arranged in the bottom wall of the sliding block 35, a second gear 36 meshed with a first gear 39 fixedly arranged at the bottom end of the rotating cylinder 56 is fixedly arranged at the tail end of an output shaft of the second motor 34, the second gear 36 is matched with a third gear 57 fixedly arranged on the outer surface of the rotating cylinder 56, and an electric push rod 37 capable of driving the sliding block 35 to move is arranged in the end wall of the right side of the sliding cavity 33.

Beneficially, the blending device 97 includes a second belt cavity 29 extending leftwards and arranged in the bottom wall of the operation cavity 28, a stirring shaft 21 is arranged between the second belt cavity 29 and the blending cavity 24 in a rotating manner, stirring paddles 20 are evenly distributed on the outer surface of the stirring shaft 21 in the blending cavity 24, a third belt wheel 30 is fixedly arranged at the tail end of the stirring shaft 21 in the second belt cavity 29, the third belt wheel 30 is connected with a fourth belt wheel 55 fixedly arranged on the outer surface of the rotating cylinder 56 in a transmission fit manner through a second belt 31, a discharging opening 25 for discharging is arranged in the end wall of the right side of the blending cavity 24, a first sliding groove 26 with an upward opening is arranged in the bottom wall of the discharging opening 25, a first sliding rod 27 is slidably arranged in the first sliding groove 26, a spring 66 is arranged between the first sliding rod 27 and the bottom wall of the first sliding groove 26, a left-right through inclined hole 62 is formed in the first sliding rod 27, a second sliding groove 65 penetrating through the first sliding groove 26 is formed in the left end wall of the operation cavity 28, a second sliding rod 64 is slidably arranged in the second sliding groove 65, and a reset device 63 for driving the second sliding rod 64 to reset is arranged between the second sliding rod 64 and the end wall of the second sliding groove 65.

Advantageously, the welding device 96 comprises a transmission cavity 40 with a left opening, which is arranged in the right end wall of the operation cavity 28, a third motor 41 is fixedly arranged in the top wall of the transmission cavity 40, and a fourth gear 32 meshed with the rotating gear ring 54 is fixedly arranged at the end of the output shaft of the third motor 41.

The fixing and connecting method in this embodiment includes, but is not limited to, bolting, welding, and the like.

Sequence of mechanical actions of the whole device:

1. when the equipment of the invention works, a sealing barrel 47 for containing nuclear waste 43 is placed in the operation cavity 28, the nuclear waste 43 is placed in the waste cavity 42, the electric claw 44 is started to clamp the top of the nuclear waste 43, the first motor 53 is started to drive the reel 51 to rotate forward, so that when the electric claw 44 is driven to move upward to lift the nuclear waste 43, the electromagnet 18 moves downward to adsorb the sealing cover 46 arranged on the top of the sealing cover 46, and at the same time, the second motor 34 is started to drive the second gear 36 to rotate, so that the first gear 39 is driven to rotate, so that the second rotating shaft 12 is driven to rotate, so that the first belt wheel 14 and the second belt wheel 16 are driven to rotate, so that the first rotating shaft 17 is driven to rotate, so that the rotating frame 19 is driven to rotate for half a circle, so that the sealing cover 46 and the nuclear waste 43 are driven to exchange positions, at the moment, the first motor 53 is started to drive the reel 51 to rotate reversely, so that the nuclear waste 43 is placed in the inner cavity of the sealed barrel 47;

2. at this time, the electric push rod 37 drives the sliding block 35 to move left, so as to drive the second gear 36 to move left and engage with the third gear 57, at this time, the second motor 34 is started to drive the second gear 36 to rotate, so as to drive the third gear 57 to rotate, so as to drive the rotating cylinder 56 to rotate, so as to drive the threaded rod 59 to move up, so as to drive the rotating gear ring 54 to move up, so as to drive the sealing barrel 47 to move up, at the same time, the rotating cylinder 56 rotates to drive the fourth belt wheel 55 to rotate, so as to drive the third belt wheel 30 to rotate, so as to drive the stirring shaft 21 to rotate, so as to drive the stirring paddle 20 to rotate and mix the isolated cement in the mixing chamber 24, when the rotating gear ring 54 moves up to abut against the second sliding rod 64, the second sliding rod 64 moves left to drive the first sliding rod 27 to move down, at the moment, the feed opening 25 is communicated, the nuclear waste 43 is located in the center of the inner cavity of the sealed barrel 47 after the sealed barrel 47 moves upwards, at the moment, the cement in the blending cavity 24 is isolated and flows into the sealed barrel 47 through the feed opening 25 to seal the nuclear waste 43, at the moment, the electric clamping jaw 44 is started to release the nuclear waste 43, at the moment, the second motor 34 is started to drive the second gear 36 to rotate reversely, so that the third gear 57 is driven to rotate reversely, the rotating barrel 56 is driven to rotate reversely, the threaded rod 59 is driven to move downwards, and the rotating gear ring 54 is driven to move downwards, so that the sealed barrel 47 is driven to move downwards;

3. when the first motor 53 is started to drive the reel 51 to rotate forward, so as to drive the electric claws 44 to move upwards to lift the nuclear waste 43, the electromagnet 18 moves downwards to drive the sealing cover 46 adsorbed by the electromagnet to move downwards, at the moment, the electric push rod 37 drives the sliding block 35 to move leftwards, thereby driving the second gear 36 to move left to engage with the first gear 39, and then the second motor 34 is started to drive the second gear 36 to rotate, thereby rotating the first gear 39 and thus the second shaft 12, and thus the first pulley 14 and the second pulley 16, thereby driving the first rotating shaft 17 to rotate, thereby driving the rotating frame 19 to rotate for half a circle, at this time, the sealing cover 46 rotates to above the sealing barrel 47, at this time, the electromagnet 18 is powered off to release the sealing cover 46, at this time, the sealing cover 46 falls to above the sealing barrel 47;

4. at this time, the third motor 41 is started to drive the fourth gear 32 to rotate, so as to drive the rotating gear ring 54 to rotate, so as to drive the sealing barrel 47 to rotate, and the welding machine 45 is started simultaneously, so as to weld the sealing cover 46 and the sealing barrel 47 together, and at this time, the electric claw 44 is matched with the rotating device 99 to lift the sealed sealing barrel 47, so that the forklift can carry the sealed sealing barrel conveniently.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.