CN210777286U - Engineering type building electrical construction technology training platform - Google Patents

Abstract

The utility model relates to a real platform of instructing of engineering formula building electrical construction technique belongs to the real teaching equipment of instructing of experiment. The practical training platform comprises more than two sets of multi-story building electrical construction models, an installation and debugging tool and a connecting component, wherein the multi-story building electrical construction models are arranged in the practical training classroom; the electrical construction model of the multi-storey building comprises a rear wall surface screen plate and more than two rows of floor plate screen plate groups, wherein the rear wall surface screen plates are vertically arranged; the floor plate screen plates are fixedly supported on the rear wall surface screen plate through the transverse support, and the spacing space between two adjacent floor plate screen plates forms the floor space of the electrical construction model of the multi-storey building; and an interval channel which penetrates through the electrical construction model of the multi-storey building from top to bottom is arranged between every two adjacent rows of floor plate mesh plate groups, and the interval channel forms a strong/weak electric well of the electrical construction model of the multi-storey building. The training platform can provide a practical training platform closer to a real construction scene for students, and can be widely applied to the fields of teaching, training and the like.

Description

Engineering type building electrical construction technology training platform

Technical Field

The utility model relates to a real teaching equipment technical field of instructing of experiment, specifically speaking relates to a real platform of instructing of engineering formula building electrical construction technique.

Background

With the continuous development of the building industry and the continuous improvement of the building intelligent program, the electrical engineering plays an increasingly important role in the building engineering, especially with the steady development of national economy, a large number of electrical engineering technical constructors which can adapt to buildings in new times are needed, and new materials, new technologies, new processes and new methods can be popularized in the design and construction process.

Currently, practice training teaching courses of relevant majors of building electrical engineering technologies are usually set up in vocational schools, but at present, schools usually utilize relevant basic teaching practice training products which embody conventional electrical principles, engineering applications and the like, for example, a building power supply and distribution teaching process simulation practice training system disclosed in patent document with publication number CN106057005A is basically limited to theoretical teaching and simulation practice training and is difficult to approach to actual engineering scenes, so that even though students can excellently complete the practice training teaching courses, the students cannot easily carry out equipment installation, debugging operation, maintenance and other work after a construction site.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a real platform of instructing of engineering formula building electrical construction technique for the student provides the real platform of instructing of pressing close to real construction scene more.

In order to achieve the main purpose, the utility model provides a practical training platform for engineering building electrical construction technology, which comprises more than two sets of electrical construction models of the multi-story building, electrical workpieces, electrical equipment, an installation and debugging tool and a connecting component, wherein the electrical workpieces and the electrical equipment are arranged in the practical training classroom; the electrical construction model of the multi-storey building comprises a rear wall surface screen plate and more than two rows of floor plate screen plate groups, wherein the rear wall surface screen plates are vertically arranged; each row of floor board mesh plate group comprises a plurality of floor board mesh plates, the plate surfaces of the floor board mesh plates are arranged along the horizontal direction, the floor board mesh plates are fixedly supported on the rear wall surface mesh plate through a transverse support, and the space between every two adjacent floor board mesh plates forms the floor space of the electrical construction model of the multi-storey building; and an interval channel which penetrates through the electrical construction model of the multi-storey building from top to bottom is arranged between every two adjacent rows of floor plate mesh plate groups, and the interval channel forms a strong/weak electric well of the electrical construction model of the multi-storey building.

The screen plate structure is adopted to simulate the floor layer and the rear wall surface, so that the connecting assembly is utilized to fix electrical workpieces and electrical equipment such as wire grooves and threading pipes at preset positions, for example, the wire grooves are fixed on the screen plate of the rear wall surface, the wire grooves are fixed on the lower surface of the screen plate of the floor layer, and the like, thereby more truly reflecting the electrical construction site conditions of the building and better training students. In addition, the construction method is closer to a real construction scene by constructing a multilayer structure.

The specific scheme is that the rear wall surface mesh plate is fixed on the wall body of a practical training classroom.

More specifically, more than two sets of multi-story building electrical construction models are sequentially arranged at intervals along the wall surface of the practical training classroom.

The other specific scheme is that the electrical equipment comprises power supply and distribution equipment, building lighting equipment and building lightning protection equipment; the electric workpiece comprises a groove, a bridge, a wire groove and a wire pipe.

The preferable proposal is that the rear wall surface screen plate and the floor board screen plate are plate body structures with meshes being screw holes; the connecting assembly comprises a fixed support, a connecting piece and an external support; the fixed support comprises a screw part and a seat body part provided with a blind hole, and external threads matched with the screw hole are formed on the peripheral surface of the screw part; the depth of the blind hole extends along the axial direction of the screw rod part, and the hole opening is arranged towards the direction departing from the screw rod part; permanent magnet blocks with the height lower than the hole depth are embedded at the bottom of the blind hole; the connecting piece comprises a groove seat part and a sleeve rod part which is detachably sleeved in the blind hole, and the sleeve rod part is made of magnetic materials; the groove seat part is provided with a mounting groove, the notch of the mounting groove is arranged along the direction departing from the sleeve rod part, the groove depth is arranged along the axial direction, the groove seat part is provided with a mounting screw hole matched with the fixing bolt, and the mounting screw hole penetrates through the two groove wall surfaces in a manner of being perpendicular to the groove wall surfaces of the mounting groove; the outer connecting support comprises an outer connecting part fixedly connected with the equipment to be fixedly connected and a fixed block part sleeved in the mounting groove, and the fixed block part is provided with a mounting through hole matched with the fixing bolt. The connecting assembly is arranged to comprise a fixed part fixed on the screen plate through threads and a detachable part detachably connected with the fixed part at least through a magnetic suction mode, so that the connecting assembly is convenient to disassemble, assemble and replace a required external connecting support in the using process to fix different equipment; and no more fixed parts need to be backed up.

More preferably, the outer connecting part is a hanger rod of a support hanger.

Another more preferred scheme is that the outer connecting part comprises a connecting rod part arranged along the axial direction of the sleeve rod part and a plate-shaped hole seat part positioned at the bottom end of the connecting rod part, and a plurality of mounting holes are formed in the hole seat part.

Another more preferred scheme is that the sleeve rod part is provided with an annular clamping groove arranged along the circumferential direction of the sleeve rod part; the base body part is provided with pin holes which are arranged along the direction vertical to the axial direction, and the pin holes and the annular clamping grooves are matched at the blind holes to form clamping groove pairs; the pin penetrating through the pin hole is clamped in the clamping groove pair, so that the sleeve rod part is rotatably fixed in the blind hole. The connecting strength between the connecting piece and the fixed support is improved, and fixed connection is provided for the suspension equipment; and in the installation process, the magnetic attraction characteristic can be utilized to achieve preliminary fixing and positioning, and the pin is utilized to carry out firm fixed connection.

The further proposal is that the pin is wrapped with an elastic layer; the elastic layer is in interference fit with the pin hole. Is convenient for being pulled out during insertion and disassembly.

Still another more preferable mode is that the end face of the sleeve rod part is in contact with the end face of the permanent magnet block. The connecting strength of the two is improved.

Drawings

Fig. 1 is a schematic top view of an embodiment of the present invention;

FIG. 2 is a perspective view of a single-station platform according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is an enlarged view of a portion B of FIG. 2;

FIG. 5 is a perspective view of the simplex position platform after two floor layer screens are omitted in the embodiment of the present invention;

FIG. 6 is an enlarged view of a portion C of FIG. 5;

fig. 7 is a side view of a single-station platform in an embodiment of the present invention;

fig. 8 is a perspective view of a first cross brace in an embodiment of the present invention;

fig. 9 is a perspective view of a second cross brace in an embodiment of the present invention;

fig. 10 is a perspective view of a first connection assembly in an embodiment of the present invention;

fig. 11 is an axial cross-sectional view of a first coupling assembly in an embodiment of the invention;

fig. 12 is an exploded view of a first coupling assembly according to an embodiment of the present invention;

fig. 13 is a schematic view illustrating an assembling process of the first connecting member and the rear wall surface mesh plate according to the embodiment of the present invention;

fig. 14 is a schematic structural view of a rear wall surface mesh plate with a plurality of first connecting assemblies fixed thereon according to an embodiment of the present invention;

fig. 15 is an exploded view of a second coupling assembly of an embodiment of the present invention with the pin omitted;

fig. 16 is a structural view of a third connecting member in the embodiment of the present invention;

fig. 17 is a perspective view of a hanging bracket according to an embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

Examples

Referring to fig. 1, the utility model discloses a multi-storey building electrical construction model 1 that the utility model discloses the real standard platform of the formula building electrical construction technology arranges in real standard classroom 01, installation and debugging instrument and fix electric work piece and electrical equipment on this multi-storey building electrical construction model 1 through coupling assembling; in this embodiment, the number of the multi-story building electrical construction models 1 is four, and the four multi-story building electrical construction models 1 are sequentially arranged at intervals along the inner wall surface of the wall body 02 of the practical training classroom 01, so that four practical training stations are formed.

The electrical equipment specifically comprises power supply and distribution equipment, building lighting equipment and building lightning protection equipment. The building power supply and distribution equipment comprises an electric meter box, a distribution box (containing a transformer), a leakage protector, an air switch, a power indicator lamp, a 86-type lighting/hidden box, a single-phase three/five-hole socket, a three-phase four-hole socket, a 86-type blank panel, an exhaust fan, a grounding mark and the like. The building lighting equipment comprises a lighting distribution box, a lighting panel switch, a screw lamp holder, a touch delay switch, a sound and light control switch, an LED integrated ceiling lamp, a spotlight, a ceiling lamp, an incandescent lamp (hoisting), a fluorescent lamp (hoisting), a wall lamp, a safety exit indicator or an LED emergency lamp, a high-pressure mercury lamp and the like. The building lightning protection equipment mainly comprises a lightning rod, a grounding annealed copper wire, a grounding rod and the like.

The electrical workpiece is used for constructing a connecting line channel between electrical equipment, and specifically comprises a groove, a bridge, a wire groove, a wire pipe and the like.

The mounting and debugging tools mainly comprise a screwdriver, a nipper pliers, an electrical pliers, an angle pliers, a wire stripper, a movable wrench, an electrical knife, a crimping pliers, an electroscope, a bench vice, a pipe bender, a digital multimeter, a clamp ammeter, a steel tape, an aluminum alloy herringbone ladder, a handsaw bow, a wood handle claw hammer and the like.

Referring to fig. 2 to 9, the electrical construction model 1 for a multi-story building includes a rear wall mesh 14 arranged vertically, and more than two rows of floor mesh groups; in this embodiment, the number of the floor grid plate groups is two rows of the floor grid plate groups 11 and the floor grid plate groups 12; each row of floor plate mesh plate group comprises three floor plate mesh plates, the three plate surfaces of which are arranged along the horizontal direction, specifically, the floor plate mesh plate group 11 comprises a floor plate mesh plate 21, a floor plate mesh plate 22 and a floor plate mesh plate 23, and the floor plate mesh plate group 12 comprises a floor plate mesh plate 24, a floor plate mesh plate 25 and a floor plate mesh plate 26; floor board otter board passes through first lateral frame 31 and second lateral frame 32 and fixed stay is on back wall otter board 14, specifically for fix on back wall otter board 14 through vertical branch 15, in this embodiment, vertical branch 15 is fixed at back wall otter board 14 through bolt or welding mode, the space between two adjacent floor board otter boards constitutes the floor space of multi-storey building electrical construction model 1, the space between lower floor board layer otter board 23, 26 and the ground constitutes bottom floor space, for example, floor space 270 between floor board otter board 21 and floor board otter board 22, floor space 271 between floor board otter board 22 and floor board otter board 23.

As shown in fig. 2 and 4, a partition passage penetrating through the electrical construction model of the multi-story building from top to bottom is arranged between two adjacent rows of floor grid plate sets, in this embodiment, a partition passage 13 is arranged between the floor grid plate set 11 and the floor grid plate set 12, and the partition passage constitutes a strong/weak electric well of the electrical construction model of the multi-story building.

As shown in fig. 8, the first horizontal bracket 31 includes a horizontal support rod 310 having a mounting screw hole 3100, a vertical support rod 311 having a mounting through hole 3110, and a reinforcing rib 312, which are fixedly connected by welding. As shown in fig. 9, the second horizontal bracket 32 includes a horizontal support rod 320 having a mounting screw hole 3200, a vertical support rod 321 having a mounting through hole 3210, and a reinforcing rib 322, which are fixedly connected by welding. In the two different structures of the transverse support, the thickness of the vertical support rod 311 is smaller than that of the transverse support rod 310, so as to reduce the material consumption as much as possible on the premise of ensuring the fixing strength, and the two structures are different, namely, the side alignment sides of the vertical support rod 311 and the transverse support rod 310 are different. The first horizontal bracket 31 and the second horizontal bracket 32 are both fixed on the rear wall surface mesh plate 14 based on the cooperation of bolts and nuts passing through the mounting through holes on the vertical supporting rod 15 and the vertical supporting rod.

When the training classroom 01 is installed, the rear wall surface mesh plate 14 is fixed on the wall 02 of the training classroom 01 through fasteners such as bolts. The floor panel net plate is fixed to the cross bar by fitting bolts to screw holes 3100 and 3200 provided in the cross bar, and the floor panel net plate 24 is fixed to the second cross frame 32 by bolts 200 as shown in fig. 7.

In order to facilitate the fixing of the related parts to the rear wall surface screen 14 and the floor screen, the screen holes are formed as screw holes, for example, screw holes 140 are formed on the rear wall surface screen 14, screw holes 240 are formed on the floor panel 24, and screw holes 210 are formed on the floor panel 21, so that the related devices can be fixed to the screen using screws as the connection members.

Fig. 10 to 12 show the first connecting assembly 4 of the present embodiment, which includes a fixing support 40, a connecting member 41, an external connecting support 42, a permanent magnet 43 and a fixing bolt 44. The body of the fixed support 40 is a cylindrical structure and comprises a screw rod part 400 and a seat body part 401 provided with a blind hole 402, wherein an external thread 403 matched with a screw hole arranged on the screen plate is formed on the peripheral surface of the screw rod part 400; the depth of the blind bore 402 is arranged along the axial extension of the screw portion 400 and the orifice is arranged in a direction away from the screw portion, in this embodiment the blind bore 402 is a circular bore, the central axis of which is arranged substantially in line with the central axis of the screw portion 400. The permanent magnet blocks 43 are directly fixed at the bottom of the blind holes 402 through adhesives such as epoxy resin, the hole depth of the blind holes 402 is higher than the height of the permanent magnet blocks 43, the permanent magnet blocks 43 are of a cylindrical structure, namely, the whole permanent magnet blocks 43 are embedded in the blind holes 402, and holes with certain depth still exist.

The connecting piece 41 comprises a slot part 410 and a sleeve rod part 411 which is detachably sleeved in the blind hole 402; the rod sleeve portion 411 is made of a magnetic material, is of a cylindrical structure in clearance fit with the blind hole 402, and is axially arranged along the axial direction of the screw rod portion 400, and the magnetic material is configured to be magnetically attracted by a magnet, and is specifically made of iron; the groove seat portion 410 is provided with a mounting groove 412, a notch of the mounting groove 412 is arranged in a direction away from the shank portion 411 and a groove depth is arranged in an axial direction of the screw portion 400, the groove seat portion 410 is provided with a mounting screw hole 4100 to be fitted with the fixing bolt 44, and the mounting screw hole 4100 penetrates through both groove wall surfaces of the mounting groove 412 perpendicularly to the groove wall surfaces thereof.

The external connection support 42 comprises an external connection part 420 for being fixedly connected with an electric workpiece and an electric equipment waiting fixedly-connected equipment, and a fixed block part 421 sleeved in the mounting groove 412; the fixing block 421 has a mounting hole 422 for engaging with the fixing bolt 44, so as to detachably fix the outer connecting seat 42 to the connecting member 41, and the fixing block 421 has a mounting groove 412 for engaging with each other, i.e. the side surfaces and the bottom surface abut against each other, thereby achieving the limiting and fixing.

In the installation process, the end surface of the sleeve rod part 411 is in contact with the end surface of the permanent magnet block 43, so that the magnetic attraction binding force between the two is improved. As shown in fig. 12, the external connection portion 420 of the first connection component 4 is a circular ring structure, which is convenient for sleeving electrical workpieces such as a conduit, for example, as shown in fig. 13 and 14, the first connection component 4 is fixed on the rear wall panel 14 by screwing the screw portion 400 and the screw holes 140 provided on the rear wall screen 14, and fixed connection to the conduit is realized by arranging one row, and in the dismounting process, only the connection member 41 and the external connection support 42 need to be pulled down together, thereby facilitating dismounting and adjustment, without directly dismounting the fixed support 40, so as to facilitate remounting after adjustment. In the using process, the angles of the connecting piece 41 and the external connecting support 42 relative to the fixed support 40 can be adjusted, and the angles can be adjusted according to actual needs along with the using process.

Fig. 15 and 16 show a structure diagram of the second connecting assembly 5 in the present embodiment, which is substantially the same as the structure of the first connecting assembly 4, and includes a fixing support 50, a connecting member 51, an external connecting support 52, a permanent magnet 53, a fixing bolt 54, and a pin 55.

In contrast, in order to enhance the connection strength between the connecting member 51 and the fixed support 50, the sleeve rod portion 511 of the connecting member 51 is provided with an annular clamping groove 510 arranged along the circumferential direction thereof; a seat body part 501 of the fixed support 50 is provided with a pin hole 505, the pin hole 505 is arranged along the direction vertical to the axial direction of the screw rod part 500, and the pin hole 505 and the annular clamping groove 510 are matched at the blind hole 502 to form a clamping groove pair; the pin 55 passing through the pin hole 505 is engaged with the slot pair, so that the connecting member 51 is prevented from falling out due to strong pulling force, and the rod portion 511 is rotatably fixed in the blind hole 502. In order to prevent the pin 55 from falling out of the pin hole 505 during use, the pin 55 is wrapped with an elastic layer; the elastic layer is in interference fit with the pin hole 505, and the pin 55 is held in the pin hole 505 more stably by the elastic deformation.

As shown in fig. 15 and 16, in the second connecting assembly 5, the external connecting portion 520 of the external connecting support 52 includes a rod portion 521 disposed along the axial direction of the rod portion 511 and a plate-shaped hole seat portion 522 located at the bottom end of the rod portion 521, and a plurality of mounting holes 523 are provided on the hole seat portion 522, so that corresponding devices, such as a lamp, can be fixed thereon by means of screw fixation, binding and the like.

As shown in fig. 17, the outer connection part 620 of the third connecting assembly is a boom of the support and hanger, so that the fixed connection to the support and hanger 7 can be realized.

In the present embodiment, three types of connection members are exemplified, but the specific structure is not limited thereto, and wires such as iron wires may be used for binding and fixing.

In the use, the building model of the real standard platform of engineering building electrical construction technology divide into 4 stations, each station divide into 3 layers, by the wall, the floor, the roof, strong/weak electric well isotructure is constituteed, every layer divide into 2 rooms again, wherein first floor room mainly used electricity distribution room or monitor room, second floor and third layer can be through the furred ceiling, the crane span structure, the slot, the threading pipe, the trough, it is bright box, the magazine, equipotential terminal box etc. realize distribution equipment and lighting apparatus's installation and debugging, thereby can realize the installation of the building electrical construction of real building inner structure and lightning-arrest equipment.

4 stations of the engineering building electrical construction technology training platform can simultaneously meet the requirement that 4-8 students simultaneously perform practical training operations such as suspended ceiling, grooves, bridges, wire grooves (exposed), wire pipes (hidden), power supply and distribution equipment (comprising distribution boxes, air switches, 86-type hidden/exposed bottom boxes, wall plugs, lighting switches and the like), lighting lamp equipment and lightning protection equipment, so that the students can completely master the design, construction, equipment installation, wiring, debugging, operation, fault maintenance and other operation skills and engineering construction capacity of engineering electric pipelines and line systems.

Through the practical training platform, students can see the inner grooves and the buried line pipes completely, and the construction site is reflected more truly. Through the practical training, students can master more than 20 skill training items such as the operating skill of common tools in the electrical construction process, the cutting and bending operating skill of a PVC pipe and a metal pipe, the connection practical training of an electrical pipe and a 86 junction box, the bridge support, the hanging, the bracket manufacturing and mounting skill, the operating skill of threading in the pipe, the lighting distribution pipe, the distribution and power-on debugging skill, the manufacturing and mounting skill of the distribution box, the distribution and power-on debugging skill of a wall plug, the lightning protection equipment mounting and grounding and the like.

Claims (10)

1. A practical training platform for engineering building electrical construction technology is characterized by comprising more than two sets of multi-story building electrical construction models, electrical workpieces, electrical equipment, an installation and debugging tool and a connecting component, wherein the multi-story building electrical construction models are arranged in the practical training platform;

the electrical construction model of the multi-storey building comprises rear wall surface screen plates which are vertically arranged and more than two rows of floor plate screen plate groups; each row of floor board mesh plate group comprises a plurality of floor board mesh plates with plate surfaces arranged along the horizontal direction, the floor board mesh plates are fixedly supported on the rear wall surface mesh plate through transverse supports, and the space between every two adjacent floor board mesh plates forms a floor space of the electrical construction model of the multi-storey building;

and a spacing channel which penetrates through the electrical construction model of the multi-storey building from top to bottom is arranged between every two adjacent rows of the floor plate mesh plate groups, and the spacing channel forms a strong/weak electric well of the electrical construction model of the multi-storey building.

2. The engineering building electrical construction technology training platform according to claim 1, characterized in that:

the rear wall surface mesh plate is fixed on the wall body of the practical training classroom.

3. The engineering building electrical construction technology training platform according to claim 2, characterized in that:

the more than two sets of multi-story building electrical construction models are sequentially arranged at intervals along the wall surface of the practical training classroom.

4. The engineering building electrical construction technology training platform according to claim 1, characterized in that:

the electrical equipment comprises power supply and distribution equipment, building lighting equipment and building lightning protection equipment;

the electric workpiece comprises a groove, a bridge frame, a wire groove and a wire pipe.

5. The engineering building electrical construction technology training platform according to any one of claims 1 to 4, characterized in that:

the rear wall surface screen plate and the floor plate screen plate are plate structures with meshes being screw holes;

the connecting assembly comprises a fixed support, a connecting piece and an external support;

the fixed support comprises a screw rod part and a seat body part provided with a blind hole, and external threads matched with the screw hole are formed on the peripheral surface of the screw rod part; the depth of the blind hole is arranged along the axial extension of the screw part, and the orifice is arranged in the direction departing from the screw part;

permanent magnet blocks with the height lower than the hole depth are embedded at the bottom of the blind hole;

the connecting piece comprises a groove seat part and a sleeve rod part which is detachably sleeved in the blind hole, and the sleeve rod part is made of a magnetic material; the groove seat part is provided with a mounting groove, the notch of the mounting groove is arranged along the direction departing from the sleeve rod part, the groove depth is arranged along the axial direction, the groove seat part is provided with a mounting screw hole matched with the fixing bolt, and the mounting screw hole penetrates through the two groove wall surfaces in a manner of being perpendicular to the groove wall surfaces of the mounting groove;

the outer connecting support comprises an outer connecting part and a fixed block part, wherein the outer connecting part is used for being fixedly connected with equipment to be fixedly connected, the fixed block part is sleeved in the mounting groove, and the fixed block part is provided with a mounting through hole matched with the fixing bolt.

6. The engineering building electrical construction technology training platform according to claim 5, characterized in that:

the outer connecting part is a hanging rod of the support hanging bracket.

7. The engineering building electrical construction technology training platform according to claim 5, characterized in that:

the outer connecting portion comprises a connecting rod portion and a plate-shaped hole seat portion, the connecting rod portion is arranged in the axial direction of the sleeve rod portion, the plate-shaped hole seat portion is located at the bottom end of the connecting rod portion, and a plurality of mounting holes are formed in the hole seat portion.

8. The engineering building electrical construction technology training platform according to claim 5, characterized in that:

the sleeve rod part is provided with an annular clamping groove arranged along the circumferential direction of the sleeve rod part; the base body part is provided with pin holes which are arranged along the direction vertical to the axial direction, and the pin holes are matched with the annular clamping grooves at the blind holes to form clamping groove pairs; the pin penetrating through the pin hole is clamped in the clamping groove pair, so that the sleeve rod part can be rotationally fixed in the blind hole.

9. The engineering building electrical construction technology training platform according to claim 8, characterized in that:

the pin is wrapped with an elastic layer; the elastic layer is in interference fit with the pin hole.

10. The engineering building electrical construction technology training platform according to claim 5, characterized in that:

the end face of the sleeve rod part is in contact with the end face of the permanent magnet block.

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