CN111504356B

CN111504356B - Information acquisition device for DG (distributed generation) site selection and volume determination of micro-grid

Info

Publication number: CN111504356B
Application number: CN202010468156.8A
Authority: CN
Inventors: 李晟锴; 高沂; 李娟�; 邢项奕
Original assignee: Huainan Union University Huainan Employee University Huainan Branch Of Anhui Open University
Current assignee: Huainan Union University Huainan Employee University Huainan Branch Of Anhui Open University
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2022-06-17
Anticipated expiration: 2040-05-28
Also published as: CN111504356A

Abstract

The invention belongs to the technical field of information acquisition, and particularly relates to an information acquisition device for DG (distributed generation) location and volume fixing of a microgrid. The wind power generation device is convenient to mount and dismount, is convenient to use outdoors, can detect the illumination intensity of different oblique intersecting bottoms and directions of the current position, provides data support for later-stage mounting of photovoltaic power generation equipment, detects the wind speed and wind power of different heights of the current position, and is convenient to mount the wind power generation device in the later stage.

Description

Information acquisition device for DG (distributed generation) site selection and volume determination of micro-grid

Technical Field

The invention relates to the technical field of information acquisition, in particular to an information acquisition device for the location and volume determination of a DG (distributed generation) of a microgrid.

Background

With the continuous increase of power demand and the continuous expansion of power grid scale, the defects of large power grids, such as high cost, high operation difficulty and the like, are increasingly highlighted, and then distributed power generation is promoted. The distributed power generation has the advantages of low investment, flexible power generation mode, high energy utilization rate, environmental protection, no pollution and the like, but the distributed power generation can bring many problems to the aspects of voltage, line tide, short-circuit current, reliability, electric energy quality and the like in a power grid, and a good solution is provided for a 'micro-grid' technology integrating a distributed power supply and a load. The micro-grid can reduce the electric energy loss, delay the time of upgrading the power grid line and reduce the cost of upgrading the power grid line, but if the position and the capacity of a distributed power supply in the micro-grid are not appropriate, the electric energy loss cannot be reduced, the cost is reduced, on the contrary, the power grid loss is increased, and the power supply quality of a system is reduced.

The method is characterized in that the site selection of a distributed power supply in a microgrid is one of important subjects, information of a current position needs to be collected when the site selection is carried out, wherein wind power and photovoltaic power generation are main components of the distributed power supply, how to collect the wind power, the wind direction, the illumination intensity and the illumination angle of the current position when the site selection of the wind power and the photovoltaic power supply is carried out, and the installation is carried out in a position and an installation direction which are suitable for the site selection.

Disclosure of Invention

The invention provides an information acquisition device for location and volume determination of a microgrid DG, which solves the problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

an information acquisition device for DG (distributed generation) location and volume fixing of a microgrid comprises a bottom plate, wherein an upright post is installed at the top of the bottom plate, a shielding shed is fixedly connected to one side of the upright post, a control box is installed at the bottom of the shielding shed, wind speed detection assemblies which are equidistantly arranged along the length direction of the upright post are installed on the outer ring of the upright post, and a light intensity detection assembly is arranged on one side of the upright post;

wind speed detection subassembly includes the rolling disc that cup joints with the stand activity, the fixed conflict mechanism that has cup jointed the loop configuration of inner circle of rolling disc, the connection lantern ring that is located the rolling disc inner circle is installed to one side of conflict mechanism, the stand is fixed cup joint with the junction post of being connected the lantern ring and contradicting, the equal rigid coupling in rolling disc outer lane both sides has the extension rod, the equal rigid coupling of one end that two sets of extension rods kept away from each other has the deflector, install the horizontal pole between deflector and the rolling disc, the pivot has been cup jointed in the horizontal pole activity, the flabellum is installed to the one end outer lane of pivot, the sensor with the horizontal pole rigid coupling is installed to the other end outer lane of pivot.

Preferably, the stand is hollow structure, and the spout of convex structure is seted up to the outer lane of stand, and the inside wall of spout sets up with the inside passageway that stretches into that communicates of stand, and the internally mounted that stretches into the passageway has the conducting rod of contradicting with conflict mechanism, and the conducting rod stretches into the inside one end of stand and installs the bracing piece with stand inside wall rigid coupling.

Preferably, the light intensity detection assembly comprises a sleeve fixedly connected with the bottom plate, a material pressing rod is movably sleeved on an inner ring at the top of the sleeve, a top receiving unit is arranged above the top of the material pressing rod, an outer ring of the top receiving unit is hinged with a sequentially hinged inclined receiving unit, a hook is hinged to the bottom of the lowest non-inclined receiving unit, and the hook is connected with a fixing frame of a U-shaped structure fixedly connected with the top of the bottom plate.

Preferably, top receiving element and slope receiving element all install the joint board of seting up the draw-in groove near sheathed tube one side, press the material pole to stretch into sheathed tube one end and install the pressure charging tray that distributes along its length direction, the bottom of pressure charging tray is seted up and is run through sheathed tube spliced eye, and the spliced eye slope upwards sets up, the inside grafting of spliced eye has branch, the top rigid coupling of branch has the butt joint piece with adjacent joint board joint, branch stretches into sheathed tube one end top from the spliced eye and sets up and press the spacing groove of material tray bottom conflict.

Preferably, the top receiving unit is of a regular polygon structure, the inclined receiving units are of a long strip-shaped structure, the inclined receiving units are hinged to the side edges of the top receiving unit, the areas of the inclined receiving units are the same as those of the top receiving unit, the number of the inclined receiving units on the same side edge of the top receiving unit is at least one group, the side edges of the top receiving unit are at least one strip, and the number of the plug-in holes below the same material pressing disc is the same as that of the side edges of the top receiving unit.

Preferably, the bottom of one end of the material pressing rod extending into the sleeve is provided with a baffle movably sleeved with the sleeve, and the bottom of the baffle is fixedly connected with a spring fixedly connected with the top of the bottom plate.

Preferably, the rolling disc comprises two sets of butt-joint plates of semicircular structures, the butt-joint plates are in sliding sleeve connection with the sliding grooves, first clamping grooves are formed in one sides, close to each other, of the two sets of butt-joint plates, and second clamping grooves of arc-shaped structures are formed in the top of the first clamping grooves and are arranged along the diameter direction of the butt-joint plates in an equidistant mode.

Preferably, conflict mechanism include with the resistance strip of the circular arc structure of first draw-in groove joint, the one end of two sets of resistance strips is contradicted each other, installs the collets between the one end of two sets of resistance strips, the connection lantern ring include two sets ofly with the current conducting plate of the semi-circular structure of second draw-in groove joint.

In the present invention,

the device comprises a bottom plate, a stand column, a shielding shed, a control box, a light intensity detection assembly, a sleeve, a material pressing rod, a top receiving unit, an inclined receiving unit, a clamping plate, a butt joint block, a support rod, a limiting groove, an inserting hole, a material pressing disc, a hook, a fixing frame, a butt joint plate, a first clamping groove, a resistance strip, an insulating block and a connecting wire, wherein the bottom plate, the stand column, the shielding shed, the control box, the light intensity detection assembly, the sleeve, the material pressing rod, the top receiving unit, the inclined receiving unit, the clamping plate, the butt joint block, the support rod, the limiting groove, the inserting hole, the material pressing disc, the hook, the fixing frame, the butt joint plate, the first clamping groove, the resistance strip, the insulating block and the connecting wire are arranged, so that the light intensity of different inclined intersecting bottoms and directions at the current position can be detected, and data support is provided for later-stage installation of photovoltaic power generation equipment;

the wind speed and wind power of different heights at the current position are detected through the arranged wind speed detection assembly, the rotating disc, the abutting mechanism, the conducting rod, the supporting rod, the wiring rod, the extension rod, the guide plate, the cross rod, the rotating shaft, the fan blades and the sensor, so that the wind power generation device is convenient to install at the later stage;

to sum up, this design installation is dismantled conveniently, and the convenience is used in the open air, can detect the illumination intensity in the different slopes of current position and crossing end and position, provides data support for later stage installation photovoltaic power generation equipment, detects out the wind speed and the wind-force size of the not co-altitude in current position simultaneously, makes things convenient for later stage installation wind power generation set.

Drawings

Fig. 1 is a schematic structural diagram of an information acquisition device for location and volume determination of a microgrid DG provided by the present invention;

FIG. 2 is a schematic structural diagram of a wind speed detection assembly of an information acquisition device for the location selection and volume determination of a microgrid DG, which is provided by the invention;

FIG. 3 is a top view of a wind speed detection assembly of an information acquisition device for the location and volume determination of a microgrid DG, which is provided by the invention;

fig. 4 is a schematic structural diagram of a light intensity detection assembly of an information acquisition device for location and volume determination of a microgrid DG provided by the present invention.

In the figure: the wind speed detection device comprises a base plate 1, a stand column 2, a shielding shed 3, a control box 4, a wind speed detection component 5, a rotating disc 501, a collision mechanism 502, a conductive rod 503, a support rod 504, a wiring rod 506, an extension rod 507, a guide plate 508, a cross rod 509, a rotating shaft 510, a fan blade 511, a sensor 512, a light intensity detection component 6, a sleeve 601, a material pressing rod 602, a top receiving unit 603, an inclined receiving unit 604, a clamping plate 605, a butt joint block 606, a support rod 607, a limiting groove 608, a 609 plug hole 610, a material pressing disc 611, a hook 612, a fixing frame 701, a butt joint plate 702, a first clamping groove 703 resistor strip, an insulating block 704 and a 705 connecting line.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-4, an information acquisition device for a microgrid DG site selection and volume fixing comprises a bottom plate 1, wherein a stand column 2 is installed at the top of the bottom plate 1, a shielding shed 3 is fixedly connected to one side of the stand column 2, a control box 4 is installed at the bottom of the shielding shed 3, wind speed detection assemblies 5 which are equidistantly arranged along the length direction of the stand column 2 are installed on the outer ring of the stand column 2, and a light intensity detection assembly 6 is installed on one side of the stand column 2;

further, wind speed detection subassembly 5 includes the rolling disc 501 with stand 2 activity cup joint, the fixed conflict mechanism 502 that has cup jointed the loop configuration of inner circle of rolling disc 501, the connection lantern ring 505 that is located the rolling disc 501 inner circle is installed to one side of conflict mechanism 502, stand 2 is fixed to be cup jointed the terminal rod 506 of contradicting with connection lantern ring 505, the equal rigid coupling in rolling disc 501 outer lane both sides has extension rod 507, the equal rigid coupling in the one end that two sets of extension rod 507 kept away from each other has deflector 508, install horizontal pole 509 between deflector 508 and the rolling disc 501, pivot 510 has been cup jointed in the activity of horizontal pole 509, flabellum 511 is installed to the one end outer lane of pivot 510, sensor 512 with horizontal pole 509 rigid coupling is installed to the other end outer lane of pivot 510.

Particularly, the upright column 2 is of a hollow structure, the outer ring of the upright column 2 is provided with a sliding chute 201 of a circular arc structure, the inner side wall of the sliding chute 201 is provided with an extending channel 202 communicated with the inside of the upright column 2, the inside of the extending channel 202 is provided with a conductive rod 503 abutting against the abutting mechanism 502, and one end of the conductive rod 503 extending into the inside of the upright column 2 is provided with a support rod 504 fixedly connected with the inner side wall of the upright column 2.

It should be noted that the light intensity detecting assembly 6 includes a sleeve 601 fixedly connected to the bottom plate 1, a material pressing rod 602 is movably sleeved on an inner ring of the top of the sleeve 601, a top receiving unit 603 is disposed above the top of the material pressing rod 602, an outer ring of the top receiving unit 603 is hinged to an inclined receiving unit 604, which is hinged in sequence, a hook 611 is hinged to the bottom of the lowest non-inclined receiving unit 604, and the hook 611 is connected to a fixing frame 612 of a U-shaped structure fixedly connected to the top of the bottom plate 1.

In addition, a clamping plate 605 provided with a clamping groove is mounted on one side of each of the top receiving unit 603 and the inclined receiving unit 604 close to the sleeve 601, a material pressing disk 610 distributed along the length direction is mounted at one end of the material pressing rod 602 extending into the sleeve 601, an insertion hole 609 penetrating through the sleeve 601 is formed in the bottom of the material pressing disk 610, the insertion hole 609 is arranged obliquely and upwards, a supporting rod 607 is inserted into the insertion hole 609, a butt joint block 606 clamped with the adjacent clamping plate 605 is fixedly connected to the top of the supporting rod 607, and a limit groove 608 abutting against the bottom of the material pressing disk 610 is formed in one end of the supporting rod 607 extending into the sleeve 601 from the insertion hole 609.

Besides, the top receiving unit 603 is a regular polygon structure, the inclined receiving units 604 are elongated structures, the inclined receiving units 604 are hinged to the sides of the top receiving unit 603, the areas of the inclined receiving units 604 and the top receiving units 603 are the same, the number of the inclined receiving units 604 on the same side of the top receiving unit 603 is at least 4, the number of the sides of the top receiving unit 603 is at least 8, and the number of the inserting holes 609 below the same material pressing disc 610 is the same as the number of the sides of the top receiving unit 603.

Furthermore, a baffle plate movably sleeved with the sleeve 601 is installed at the bottom of one end of the material pressing rod 602 extending into the sleeve 601, and a spring fixedly connected with the top of the bottom plate 1 is fixedly connected to the bottom of the baffle plate.

Specifically, the rotating disc 501 includes two sets of butt-joint plates 701 of semicircular structures, and the butt-joint plates 701 are slidably sleeved with the sliding grooves 201, a first clamping groove 702 is provided on one side of the two sets of butt-joint plates 701 close to each other, and a second clamping groove of a circular arc structure is provided at the top of the first clamping groove 702 and is equidistantly arranged along the diameter direction of the butt-joint plates 701.

Specifically, the abutting mechanism 502 includes resistance strips 703 of an arc structure that are clamped with the first clamping groove 702, one ends of two groups of resistance strips 703 abut against each other, an insulating block 704 is installed between one ends of two groups of resistance strips 703, and the connecting sleeve ring 505 includes two groups of conductive plates of a semicircular structure that are clamped with the second clamping groove;

the first embodiment is as follows:

the top receiving unit 603 comprises a placing plate with an opening at the top, the placing plate is fixedly connected with the clamping plate 605, a voltmeter fixedly connected with the placing plate is installed at one side of the clamping plate 605, a photovoltaic panel is embedded at the opening at the top of the placing plate, and the structures of the inclined receiving unit 604 and the top receiving unit 603 are consistent;

example two:

a controller and a storage battery are installed inside the control box 4, a display screen, a power interface, a data interface and a ship-shaped switch are installed on one side of the control box 4, the controller is sequentially electrically connected with the wiring rod 506 through a lead, the sensor 512 is connected with the connection sleeve ring 505 through a lead, one end, close to the insulating block 704, of one resistance strip 703 is connected with a connecting wire 705, the other end of the connecting wire 705 is connected with the connection sleeve ring 505, a resistance meter is connected between the conductive rod 503 and the collision mechanism 502, one input end of the resistance meter is connected with the conductive rod 503 through a lead, one input end of the resistance meter is connected with the wiring rod 506, which is collided with the connection sleeve ring 505 conducted by the collision mechanism 502 through a lead, the resistance meter is connected with the controller, and one connection sleeve ring 505 is connected with only one lead;

example three:

the guide plate 508 is a hollow structure, and the thickness of one end of the guide plate 508 away from the extension rod 507 is gradually reduced along the length direction thereof.

The working principle is as follows: when the light intensity detection assembly 6 is assembled, the material pressing rod 602 is inserted from the top of the sleeve 601, the supporting rod 607 is inserted into the sleeve 601 from the inserting hole 609, in order to ensure that the direction of the limiting groove 608 on the supporting rod 607 is upward, the cross sections of the supporting rod 607 and the inserting hole 609 are both in a regular polygon structure, the supporting rod 607 is abutted with the outer ring of the material pressing rod 602 after being inserted into the sleeve 601, then the top receiving unit 603 is placed at the top of the material pressing rod 602, the clamping plate 605 at the bottom of the top receiving unit 603 is clamped with the butt-joint block 606 at the top of the material pressing rod 602, the inclined receiving unit 604 is clamped with the supporting rod 607 in the same way, then the hook 611 at the bottom of the inclined receiving unit 604 at the lowest part is pulled to enable the hook 611 to be butted with the fixing frame 612, when the top receiving unit 603 is butted, the top receiving unit 603 moves downwards to drive the material pressing rod 602 to move downwards, and meanwhile, the material pressing plate 610 on the material pressing rod 602 extends downwards into the limiting groove 608 of the supporting rod 607, therefore, the supporting rod 607 is clamped, when the illumination intensity is detected, the photovoltaic panels on the top receiving unit 603 and the inclined receiving unit 604 convert solar energy into electric energy, the voltmeter is used for detecting the current voltage, so that the illumination intensity of the current position is obtained, meanwhile, because the inclined receiving unit 604 is in an inclined state under the support of the supporting rod 607, all the inclined angles of the inclined receiving units 604 are the same, and the inclined receiving units 604 are arranged along the circumferential direction of the sleeve 601, so that the illumination intensity of the current position, different directions and the inclined state can be detected;

when the intensity and the direction of the wind force at the current position are detected, the wind blows the wind speed detection assembly 5 on the upright post 2, the two groups of guide plates 508 drive the wind speed detection assembly 5 to rotate along the upright post 2 under the action of the wind, at this time, the abutting mechanism 502 rotates relative to the upright post 2, the position between the conductive rod 503 and the connecting wire 705 changes, so that the resistance between the conductive rod 503 and the connecting wire 705 changes, the wind direction is judged by utilizing the resistance, when the judgment is made, the contact zero point of the conductive rod 503 and the insulating block 704 is in contact, the central line of the sleeve 601 is taken as a circular point, the abutting mechanism 502 is equally divided in the clockwise direction, when the resistance is rotated, the resistance is changed, the detected resistance is compared with the equally divided resistance, so that the wind direction is determined by the resistance, the detection of the wind direction is realized, when the wind force is detected, the fan blade 511 drives the rotating shaft 510 to rotate, a sensor 512 adopting an absolute value encoder detects the rotating speed of the rotating shaft 510, so that the current wind speed is given;

the design, the installation and the disassembly are convenient, the outdoor use is convenient, the illumination intensity of the current position in different inclined intersection bottoms and directions can be detected, the data support is provided for the later-stage installation of the photovoltaic power generation equipment, the wind speed and the wind power size of the current position in different heights can be detected simultaneously, and the later-stage installation of the wind power generation device is facilitated.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. An information acquisition device for DG (distributed generation) location and volume fixing of a microgrid comprises a bottom plate (1) and is characterized in that an upright post (2) is mounted at the top of the bottom plate (1), a shielding shed (3) is fixedly connected to one side of the upright post (2), a control box (4) is mounted at the bottom of the shielding shed (3), wind speed detection assemblies (5) which are equidistantly arranged along the length direction of the upright post (2) are mounted on the outer ring of the upright post (2), and a light intensity detection assembly (6) is arranged at one side of the upright post (2);

the wind speed detection assembly (5) comprises a rotating disc (501) movably sleeved with an upright post (2), an inner ring of the rotating disc (501) is fixedly sleeved with a collision mechanism (502) with an annular structure, one side of the collision mechanism (502) is provided with a connecting lantern ring (505) positioned at the inner ring of the rotating disc (501), the upright post (2) is fixedly sleeved with a wiring rod (506) which is in collision with the connecting lantern ring (505), two sides of the outer ring of the rotating disc (501) are fixedly connected with extension rods (507), the ends, far away from each other, of the two sets of extension rods (507) are fixedly connected with guide plates (508), a cross rod (509) is arranged between each guide plate (508) and the rotating disc (501), the cross rod (509) is movably sleeved with a rotating shaft (510), a fan blade (511) is arranged on the outer ring of one end of the rotating shaft (510), and a sensor (512) fixedly connected with the cross rod (509) is arranged on the outer ring of the other end of the rotating shaft (510);

the light intensity detection assembly (6) comprises a sleeve (601) fixedly connected with the bottom plate (1), a material pressing rod (602) is movably sleeved on an inner ring at the top of the sleeve (601), a top receiving unit (603) is arranged above the top of the material pressing rod (602), an inclined receiving unit (604) which is sequentially hinged is hinged to an outer ring of the top receiving unit (603), a hook (611) is hinged to the bottom of the lowest non-inclined receiving unit (604), and the hook (611) is connected with a fixing frame (612) which is of a U-shaped structure and fixedly connected with the top of the bottom plate (1);

clamping plates (605) provided with clamping grooves are respectively arranged on one sides, close to the sleeve (601), of the top receiving unit (603) and the inclined receiving unit (604), pressing discs (610) distributed along the length direction of the pressing bars (602) are arranged at one ends, extending into the sleeve (601), of the pressing bars, inserting holes (609) penetrating through the sleeve (601) are formed in the bottoms of the pressing discs (610), the inserting holes (609) are obliquely and upwards formed, supporting rods (607) are inserted into the inserting holes (609), butt-joint blocks (606) clamped with the adjacent clamping plates (605) are fixedly connected to the tops of the supporting rods (607), and limiting grooves (608) abutted against the bottoms of the pressing discs (610) are formed in the positions, above the ends, extending into the sleeve (601), of the supporting rods (607) from the inserting holes (609);

the top receiving unit (603) is of a regular polygon structure, the inclined receiving unit (604) is of a long strip-shaped structure, the inclined receiving unit (604) is hinged to the side edge of the top receiving unit (603), the areas of the inclined receiving unit (604) and the top receiving unit (603) are the same, the number of the inclined receiving units (604) on the same side edge of the top receiving unit (603) is at least 4, the number of the side edges of the top receiving unit (603) is at least 8, and the number of the inserting holes (609) below the same material pressing disc (610) is the same as the number of the side edges of the top receiving unit (603).

2. The information acquisition device for the DG locating and sizing of the microgrid according to claim 1, characterized in that the upright column (2) is of a hollow structure, the outer ring of the upright column (2) is provided with a sliding chute (201) of a circular arc structure, the inner side wall of the sliding chute (201) is provided with an extending channel (202) communicated with the inside of the upright column (2), the extending channel (202) is internally provided with a conductive rod (503) which is abutted against the abutting mechanism (502), and one end of the conductive rod (503) extending into the inside of the upright column (2) is provided with a support rod (504) fixedly connected with the inner side wall of the upright column (2).

3. The information acquisition device for the DG locating and sizing of the microgrid according to claim 1 is characterized in that a baffle movably sleeved with the sleeve (601) is installed at the bottom of one end, extending into the sleeve (601), of the material pressing rod (602), and a spring fixedly connected with the top of the bottom plate (1) is fixedly connected to the bottom of the baffle.

4. The information acquisition device for the grid DG locating and sizing of the microgrid according to claim 1, wherein the rotating disc (501) comprises two groups of butt-joint plates (701) in a semicircular structure, the butt-joint plates (701) are slidably sleeved with the sliding grooves (201), first clamping grooves (702) are formed in one sides, close to each other, of the two groups of butt-joint plates (701), and second clamping grooves in circular arc structures are formed in the tops of the first clamping grooves (702) and are arranged at equal intervals in the diameter direction of the butt-joint plates (701).

5. The information acquisition device for the DG locating and sizing of the microgrid according to claim 1, characterized in that the interference mechanism (502) comprises resistance strips (703) of a circular arc structure which are clamped with a first clamping groove (702), one ends of two groups of resistance strips (703) are mutually interfered, an insulating block (704) is arranged between one ends of two groups of resistance strips (703), and the connecting lantern ring (505) comprises two groups of conductive plates of a semicircular structure which are clamped with a second clamping groove.