CN110391626A - Plug-in for concentration bus duct conductor is without winding insulator - Google Patents

Abstract

Provide a snap-fit non-winding insulator for dense busway conductors, which has an insulating body composed of an upper sheath and a lower sheath, and the outer sides of the upper and lower sheaths are respectively adapted by convex clamping blocks and concave clamping grooves Fastened and connected as a whole, the inner sides of the upper and lower sheaths are respectively made with upper U-shaped card slots and lower U-shaped card slots corresponding to the copper bars of each phase of the busbar; the fastened upper and lower sheaths have A number of insulation channels corresponding to the copper bars of each phase of the busbar, and several insulation channels will limit and fix the bottom insulation of the copper bars of each phase of the busbar and package them in the insulation body; and the joints of the insulation channels are tightly fitted. The structure is tightly fitted and connected as a whole. The invention reduces the technical difficulty of making the insulation part of the conductor, improves product quality and work efficiency, and at the same time facilitates the control of production costs. The insulation sheath has uniform types, high standardization, reliable quality, wear resistance and durability, and excellent electrical performance.

Description

Snap-on twist-free insulators for dense busway conductors

technical field

The invention belongs to the technical field of dense bus ducts for electrical power transmission and distribution, and in particular relates to a snap-fit non-winding insulator used for conductors of dense bus ducts.

Background technique

With the emergence of modern engineering facilities and equipment, the power consumption of all walks of life is increasing rapidly. During the construction and wiring installation of high-rise buildings and large-scale workshops, cables for power transmission are required to meet the parallel use of multiple cables and reduce the number of multiple cables. On-site installation, construction, connection and wiring of cables are difficult, and dense bus ducts for low-voltage integrated power supply to transmit and distribute electric energy have emerged as the times require. In the prior art, (as shown in FIG. 1 ) the intensive busway is mainly composed of three parts: a bottom case, a conductive component 1 and a cover plate. Among them, in order to ensure excellent electrical clearance and creepage distance for the conductive component 1 at the end of the dense busway: first, the conductive copper bars of the conductive component 1 need to be bent using the copper bar bending process 2 to ensure the interphase between the ends of the copper bars distance; then, at the bottom of the copper bar of the conductive component 1 and the part that needs to be insulated, it is necessary to use DuPont polyester film or 3M insulating film 3 to cover and wrap the insulating end as a whole, in order to complete the qualified dense type as shown in Figure 2 The production of bus duct ends meets the requirements of not easy aging between the joints of dense bus duct ends and excellent electrical insulation performance, as well as mechanical properties and heat resistance. However, due to the influence of manual wrapping and the bending process of the conductive terminal, three layers of 3M tape must be wrapped at the bending part 2 of the terminal, and the winding position of the 3M tape must coincide with the polyester sleeve that wraps the copper bar. Meet the electrical needs of dense busbars. It can be seen that under the wrapping insulator method of dense busway in the prior art, the insulation wrapping and winding of the end of the conductive component of dense busway is difficult and demanding, and the product quality uniformity is not ideal; not only that, affected by the traditional wrapping process Influence, when wrapping at the bending arc of the conductor, usually there will be uneven winding, flow wrapping, obvious wrinkles, uneven thickness, especially the defects of air bubbles; The efficiency is low, the wrapping technology is difficult, and the work efficiency is low; especially the appearance quality of the product is poor, and the reliability of the product quality uniformity cannot be guaranteed; not only that, but the wrapped dense busway insulator is very difficult during transportation and installation. It may be caused by assembly or transportation friction that wears the wrapping insulator and affects the service life of the busway; therefore, the following technical solutions are proposed.

Contents of the invention

The technical problem solved by the present invention is to provide a snap-fit non-winding insulator for conductors of dense bus ducts, through the snap-fit non-twist bus insulation body, the direct insulation of each phase sequence at the end of the bus can be achieved, which is simple and reliable. Insulation protection, simplifies assembly, beautifies appearance, improves production efficiency, prevents wear and tear, and improves electrical reliability.

The technical solution adopted in the present invention: the clip-type non-wound insulator used for dense busway conductors has an insulating body, the insulating body is composed of an upper sheath and a lower sheath, and the outer sides of the upper sheath and the lower sheath are respectively passed through convex The type card block and the concave card slot are fixedly connected by an adapter, and the inner sides of the upper sheath and the lower sheath are respectively equipped with an upper row of U-shaped card slots and a lower row of U-shaped card slots that match the copper bars of each phase of the busbar. card slot; and after the upper and lower sheaths are fastened together, the upper row of U-shaped card slots and the lower row of U-shaped card slots enclose a number of insulating channels corresponding to the copper bars of each phase of the busbar, and several insulating channels connect the copper bars of each phase of the busbar. The bottom row of bottom insulating part is fixedly clamped and sealed in the insulating body; and the upper row of U-shaped card slots and the lower row of U-shaped card slots form several insulating channels. One.

In order to improve the electrical sealing and insulation effect, preferably: the close-fitting parent-child structure includes oblique-fitting parent-child structure, Z-shaped fitting parent-child structure, and convex-concave fitting parent-child structure.

In order to improve the reliability of electrical sealing and insulation, further: the closely fitting surface of the parent-child structure is coated with an insulating and sealing adhesive.

In order to ensure bonding strength, water resistance, heat resistance, wear resistance and electrical insulation sealing performance, and improve its crack resistance performance, preferably: the insulating sealing adhesive is a polyvinyl acetal modified phenolic resin adhesive.

For the convenience of processing and making, preferably: the upper sheath, the lower sheath, the convex block, the upper row of U-shaped draw-in grooves that the upper and lower sheathes have respectively, the concave-shaped draw-in grooves, and the lower row of U-shaped draw-in grooves are respectively connected with the upper and lower row of U-shaped draw-in grooves. The lower sheath is integrally molded with BMC unsaturated polyester bulk resin molding compound.

In order to meet the requirements of three-phase five-wire intensive busway, further: the insulation channel of the insulating body composed of the upper sheath and the lower sheath includes PE phase line duct, N phase line duct, and L1, L2, L3 phase line duct ; Among them, L1, L2, L3 phase line slots and N phase line slots are all axisymmetric U-shaped slots, and PE phase line slots are axisymmetric V-shaped slots with an opening angle of 90°.

In order to ensure the convenience and firmness of the upper and lower sheaths, further: the convex clamping block is formed by coaxially stacking the cylindrical first boss at the bottom and the second boss at the top, wherein The edge of the first step of the second boss is rounded; the root of the second boss and the first step of the first boss form a concave right-angle limit groove structure; the aforementioned convex block is completely incorporated into the concave slot And fit and buckle with the concave card slot; the vertical groove wall of the aforementioned concave card slot is radially shaped with positioning bosses arranged in a ring; the positioning bosses and the right-angle limit groove structure positioning adapter card connected and completely included in the right-angle limit groove structure, and the cross-sectional shape of the aforementioned positioning boss is an arc-shaped boss greater than or equal to 180°.

In order to adapt to and simplify the fixing of the insulating body, further: the insulating body is clamped and positioned at the end of the intensive bus duct housing by using a fastening component through the left and right splints with left and right axial symmetry.

Advantage of the present invention compared with prior art:

1. This scheme adopts the insulating sleeve with convex-convex fit instead of the wrapped insulation method to make intensive busway. Anyone can realize the assembly and manufacture of conductive components and insulators, which greatly reduces the difficulty of making the phase sequence of the busbar terminal that requires insulation. And the quality of the completed busbar terminal phase sequence products is uniform; the copper bar conductive components between adjacent phase sequences are distributed smoothly at the bending arc, with uniform thickness and no wrinkles, especially to overcome the wrapping insulation layer that is prone to air bubbles Defects; the assembly method of left and right fastening and clamping, compared with the wrapping process of 0.3h to complete a product wrapping production cycle, only needs two steps of glue coating and fastening to complete, the operation is simple, the installation is efficient, and greatly improved Work efficiency; product appearance quality is uniform, insulator insulation electrical performance is more reliable, and product performance is stable; the wear effect of wrapped dense busway during transportation and installation is eliminated, and the busway has a longer service life and is more reliable;

2. This solution adopts mold injection extrusion molding. It only needs to make molds according to the product structure and shape. It has a high degree of standardization, no quality risks, neat and beautiful appearance, and long service life; combined with the advantages of materials, it has excellent insulation performance and reliable quality; synergy The fast assembly advantages of the snap-fit structure, combined with the adhesive to achieve insulation and sealing at the tight fit, are reliable in quality.

Description of drawings

Figure 1 is a schematic diagram of the structure before wrapping the copper bars of each phase of the dense busway bus in the prior art;

Fig. 2 is a structural schematic diagram of the wrapped copper bars of each phase of the intensive busway bus in the prior art;

Fig. 3 is a schematic diagram of the three-dimensional structure of the upper sheath of the insulating body of the present invention;

Fig. 4 is a schematic diagram of the three-dimensional structure of the lower sheath of the insulating body of the present invention;

Fig. 5 is the front view of Fig. 3;

Fig. 6 is A-A sectional view of Fig. 5;

Fig. 7 is the front view of the specific embodiment of the concave groove of the lower sheath;

Fig. 8 is a schematic diagram of the close fitting schematic diagram of the embodiment of the oblique bonding of the parent-child structure of the upper and lower sheath insulation channels in the direction shown in Fig. 6;

Fig. 9 is a close fitting schematic diagram of a Z-shaped fitting mother-in-son structure embodiment of the upper and lower sheath insulation channels;

Fig. 10 is a close fitting schematic diagram of an embodiment of a convex-concave fitting sub-substructure of the upper and lower sheath insulation channels;

Figure 11 is a schematic diagram of the combined installation process of the upper and lower sheaths related to the convex block and the concave slot;

Fig. 12 is an assembly drawing of the upper and lower sheaths after the combination of the convex block and the concave slot;

Fig. 13 is a schematic structural diagram of an application example of the application of the insulating body of the present invention to the copper bars of each phase of the dense busway busbar.

Detailed ways

Specific embodiments of the present invention are described below in conjunction with accompanying drawings 3-13.

The following examples facilitate a better understanding of the present invention, but do not limit the present invention. The materials and components in the following examples are conventional components and materials, unless otherwise specified, and are commercially available.

In the present invention, unless stated otherwise, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical The orientations or positional relationships indicated by "straight", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the Describes, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless it is integrally formed, the fixing of the insulating body may be directly connected or indirectly connected through other intermediate components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The snap-fit non-twisting insulator for dense busway conductors has an insulating body 1, and the insulating body 1 is composed of an upper sheath 2 (as shown in Figure 3) and a lower sheath 3 (as shown in Figure 4), and The outer sides of the upper sheath 2 and the lower sheath 3 are fixedly connected as a whole through the convex clamping block 21 and the concave card groove 31 respectively, and the inner sides of the upper sheath 2 and the lower sheath 3 are respectively formed with respective bus bars. The corresponding upper row of U-shaped card slots 401 and lower row of U-shaped card slots 402 are matched with the corresponding copper bar 4; Enclose a number of insulating channels 403 corresponding to the copper bars 4 of each phase of the busbar (as shown in Figures 8, 9, and 10), and the insulating channels 403 limit and fix the bottom insulation of the copper bars 4 of each phase of the busbar. In the insulating body 1 (as shown in Figure 13); not only that, in order to ensure the insulation performance of the insulating body 1 close fit: and the upper row of U-shaped card slots 401 and the lower row of U-shaped card slots 402 form a bonding of several insulating channels 403 Place adopts closely fitting child-mother structure 5 (as Fig. 8, Fig. 9, Fig. 10) closely fits and connects as a whole.

On the basis of the above-mentioned embodiments, in order to improve the electrical sealing and insulation effect, preferably: the parent-child structure that the parent-child structure 5 closely fits includes a bevel-fitted parent-child structure 51 (as shown in Figure 8 ), a Z-shaped bonded parent-child structure 51 (as shown in Figure 9), convex-concave fitting sub-parent structure 53 (as shown in Figure 10). In order to improve the reliability of electrical sealing and insulation, further: the close-fitting surface of the parent-child structure 5 is coated with an insulating and sealing adhesive. Before the upper and lower sheaths are fastened and clamped with sealing adhesive, apply the adhesive on the joint surface where the parent-child structure 5 is tightly fitted, and then package and buckle the copper bars 4 of each phase of the busbar in the upper and lower sheaths, and Along with the gluing, the upper and lower sheaths are firmly connected together, that is, the assembly of the insulating body 1 is completed while the upper and lower sheaths are fastened together. Through the co-action of the closely fitted sub-mother structure 5, while the convex clamping block 21 and the concave clamping groove 31 are fit and fastened together, the performance between the busbar copper bars in each phase channel of the insulating body 1 is reliable, Excellent electrical performance of the insulating performance, further improving the reliability of the insulating body 1 and enhancing its service life.

On the basis of the above-mentioned embodiments, in order to ensure the electrical insulation sealing performance of bonding strength, water resistance, heat resistance and wear resistance, and improve its crack resistance performance, preferably: the insulating sealing adhesive is polyvinyl acetal modified Phenolic resin adhesive. The phenolic resin adhesive modified by polyvinyl acetal is selected. Among them, the phenolic resin adhesive itself has the advantages of high bonding strength, water resistance, heat resistance, wear resistance and good chemical stability. However, before modification, it has disadvantages such as low wear resistance, high cost, high curing temperature, and long hot pressing time. For this reason, the present invention selects the modified phenolic resin adhesive for use, preferably, selects to introduce polymer elastomer in the phenolic resin, namely polyvinyl alcohol and its acetal are modified to it, polyvinyl alcohol and its acetal modified The final phenolic resin adhesive can improve the elasticity of the adhesive layer, reduce the internal stress, and overcome the defects of phenolic resin adhesives that are prone to aging and cracking; at the same time, the initial tack, adhesion and water resistance of the adhesive are also correspondingly improved, and the comprehensive adhesive performance obvious improvement.

It should be noted that phenolic resin adhesives are prepared by the reaction of phenol and formaldehyde, especially thermosetting adhesives. The cost is lower than that of epoxy adhesives, the heat resistance is better, the brittleness is significantly reduced after modification, and the cost performance is excellent.

On the basis of the above-mentioned embodiments, in order to facilitate forming and processing, preferably: the upper sheath 2, the lower sheath 3, the convex block 21, the upper row of U-shaped card slots 401, the concave card The groove 31, the lower row of U-shaped card grooves 402 and the upper and lower sheaths are integrally molded with BMC unsaturated polyester resin molding compound respectively. Specifically, as shown in Figure 3 and Figure 4, the upper row of U-shaped card slots 401 and the convex block 21 of the upper sheath 2 are integrally formed with BMC unsaturated polyester resin molding compound; the lower sheath 3 The lower row of U-shaped card slots 402 and concave card slots 31 are integrally molded with BMC unsaturated polyester bulk resin molding compound.

Regarding BMC unsaturated polyester bulk resin molding compound, it should be explained that: BMC is the abbreviation of glass fiber reinforced unsaturated polyester thermosetting plastic, which is a kind of reinforced thermosetting plastic. BMC material is the abbreviation of Bulk Molding Compounds, that is, bulk molding compound. Often referred to as unsaturated polyester bulk molding compound. Its main raw materials are GF (chopped glass fiber), UP (unsaturated resin), MD (filler calcium carbonate) and various additives that are fully mixed into a dough-like prepreg. BMC bulk molding compound has excellent electrical properties, mechanical properties, heat resistance, chemical corrosion resistance, adapts to various molding processes, and can meet the performance requirements of various products. In addition, it has good flame retardancy and tracking resistance, high dielectric strength, corrosion and stain resistance, excellent mechanical properties, low shrinkage and stable color. Therefore, in summary, the insulating body 1 made of this material has good electrical properties, mechanical properties, heat resistance, chemical corrosion resistance, and reliable quality.

On the basis of the above-mentioned embodiments, in order to meet the requirement of three-phase five-wire intensive bus duct, further: the insulation channel of the insulating body 1 composed of the upper sheath 2 and the lower sheath 3 includes a PE phase duct 6 (Fig. 3 , Figure 4), N-phase wire slot 7, and L1, L2, L3 phase wire slot 8; wherein L1, L2, L3 phase wire slot 8 and N-phase wire slot 7 are all axisymmetric U-shaped slots (see Figure 6) , the PE phase line slot 6 is an axisymmetric V-shaped slot with an opening angle of 90°. Wherein, the diameter of the semi-circular arc at the bottom of the U-shaped groove matches the thickness of the copper bar conductors, and the copper bar conductors of any phase are closely matched with the limit clips and positioned in the insulating channel. Wherein, the PE phase line groove 6 is an axisymmetric V-shaped groove with an opening angle of 90°, and is limited and fixed by means of clamp positioning.

On the basis of the above-mentioned embodiments, in order to ensure the convenience and firmness of the clamping of the upper and lower sheaths, further: the convex clamping block 21 is composed of a cylindrical bottom first boss 2101 and a top second boss The platform 2102 is coaxially integrally molded and stacked (as shown in FIG. 11 ), wherein, in order to reduce the clamping and pushing resistance when the upper and lower sheaths are snapped up and down and fitted: the first step of the second boss 2102 Rounded corners 2103 are formed on the edge of the step; when the convex clamping block 21 and the concave clamping groove 31 are fitted and snapped together, in order to prevent the convex clamping block 21 from falling back from the concave clamping groove 31: the second boss The root of 2102 and the first step of the first boss 2101 form a concave right-angle limit groove structure 2104; the aforementioned convex block 21 is completely incorporated into the concave slot 31 and fits and engages with the concave slot 31; the aforementioned The vertical groove wall of the concave card groove 31 is radially formed with positioning bosses 3101 arranged in a ring; the positioning bosses 3101 are positioned and fitted with the right-angle limiting groove structure 2104 and are completely incorporated into the right-angle limiting groove Structure 2104 (as shown in Figure 12). In addition, in order to facilitate the sliding of the positioning boss 3101, cooperate with the right-angle limit groove structure 2104 to limit the retraction and falling off of the positioning boss 3101: the cross-sectional shape of the aforementioned positioning boss 3101 is an arc boss with an angle greater than or equal to 180° , the embodiment shown in Fig. 11 and Fig. 12, the embodiment in which the cross-sectional shape of the positioning boss 3101 is a 180° arc boss.

On the basis of the above-mentioned embodiments, in order to adapt to and simplify the fixing of the insulating body, further: (as shown in Figure 13 ) the insulating body 1 uses the left and right splints 9 with left and right axial symmetry to use the fastening assembly 10 in the intensive bus duct The end of the shell is clamped and positioned for installation.

The principle of installation and assembly of the present invention is as follows: first, the upper sheath 2 or the lower sheath 3 is used to coat a layer of adhesive at the 5 positions of the mother-in-law structure closely fitted. Put the lower sheath 3 corresponding to the copper bars 4 of each phase of the bus bar made by the bending process, place the copper bars 4 of each phase of the bus bar into the lower row of U-shaped slots 402 for positioning, and then directly place the convex block 21 of the upper sheath 2 Align the concave groove 31 of the lower sheath 3, and then press the outer side walls of the upper and lower sheaths up and down with both hands, so that the upper and lower sheaths can be tightly connected as a whole to form the insulating body 1 of the copper bars 4 of each phase of the busbar . Finally, as shown in Figure 13, the pre-installed dense bus duct with insulating body 1 is clamped between the left and right splints 9 as shown in Figure 13, and the clamping is performed to complete the production of the dense bus duct .

From the above description, it can be found that the present invention adopts the insulation sleeve with convex-convex fit instead of the wrapping insulation method to make intensive busway. Compared with the wrapping method, anyone can realize the assembly and manufacture of conductive components and insulators, which greatly reduces It eliminates the difficulty of making the phase sequence of the bus terminal that needs to be insulated, and the quality of the finished bus terminal phase sequence product is uniform; the conductive components of the copper bars between adjacent phase sequences are distributed smoothly at the bending arc, with uniform thickness and no wrinkles , especially to overcome the defect that the wrapping insulation layer is easy to generate air bubbles; the assembly method of left and right buckle and clamping, compared with the wrapping process of 0.3h to complete a product wrapping production cycle, only needs two steps of glue coating and fastening It can be completed, the operation is simple, the installation is efficient, and the work efficiency is greatly improved; the appearance quality of the product is uniform, the electrical performance of the insulator insulation is more reliable, and the product performance is stable; the wear effect of the wrapped dense busway during transportation and installation is eliminated. The busway has a longer service life and is more reliable.

Furthermore, the present invention adopts mold injection extrusion molding, only needs to open molds according to product structure and shape, high degree of standardization, no quality hazards, neat and beautiful appearance, long life; combined with the advantages of materials, excellent insulation performance and reliable quality; The rapid assembly advantages of the synergistic snap fit structure, combined with the adhesive to achieve the insulation seal of the tight fit, and the quality is reliable.

To sum up, the present invention effectively solves the technical problems of complex bus duct conductor insulation wrapping manufacturing process, low efficiency, easy wear, poor quality reliability, aesthetic appearance and inconsistent quality in the prior art; the structure Simple, relatively economical, and excellent in practicability.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

The foregoing embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, so all equivalent changes made with the contents of the claims of the present invention should be included within the scope of the claims of the present invention .

Claims (8)

1. The snap-fit non-wound insulator for dense busway conductors is characterized in that it has an insulating body (1), and the insulating body (1) is composed of an upper sheath (2) and a lower sheath (3) , and the outer sides of the upper sheath (2) and the lower sheath (3) are fixedly connected as a whole through the convex block (21) and the concave card groove (31) respectively, and the upper sheath (2) and the lower sheath The inner side of the sheath (3) is respectively formed with an upper row of U-shaped card slots (401) and a lower row of U-shaped card slots (402) corresponding to the copper bars (4) of each phase of the busbar; and the upper and lower sheath buckles After being combined, the upper row of U-shaped card slots (401) and the lower row of U-shaped card slots (402) enclose a number of insulating channels (403) corresponding to the copper bars (4) of each phase of the busbar, and several insulating channels ( 403) The copper bars (4) of each phase of the busbar (4) are clamped and fixed at the bottom of the insulating body (1); and the upper U-shaped card slot (401) and the lower row U-shaped card slot (402) are composed of several The bonding place of the insulating channel (403) adopts the closely fitting mother-in-law structure (5) to closely fit and connect as a whole. 2. The snap-fit non-wound insulator for dense busway conductors according to claim 1, characterized in that: the close-fitting sub-structure (5) includes a bevel-fitting sub-structure (51), Z Type fitting child-mother structure (51), convex-concave fitting child-mother structure (53). 3. The snap-fit non-twisting insulator for conductors of dense bus ducts according to claim 1 or 2, characterized in that: the closely adhering surface of the parent-child structure (5) is coated with insulating and sealing adhesive. 4. The snap-fit non-twisting insulator for conductors of intensive bus ducts according to claim 3, characterized in that: the insulating sealing adhesive is a polyvinyl acetal modified phenolic resin adhesive. 5. The snap-fit non-wound insulator for dense busway conductors according to claim 1, characterized in that: the upper sheath (2), the lower sheath (3), the upper and lower sheaths are respectively The convex block (21), the upper row of U-shaped card slots (401), the concave card slot (31), the lower row of U-shaped card slots (402) are respectively connected with the BMC unsaturated polyester groups for the upper and lower sheaths. Shaped resin molding compound is integrally molded. 6. The snap-fit non-wound insulator for conductors of dense busway according to claim 1, characterized in that: the insulating body (1) composed of the upper sheath (2) and the lower sheath (3) The insulation channel includes PE phase wire slots (6), N phase wire slots (7), and L1, L2, L3 phase wire slots (8); wherein L1, L2, L3 phase wire slots (8) and N phase wire slots ( 7) All are axisymmetric U-shaped grooves, and the PE phase line groove (6) is an axisymmetric V-shaped groove with an opening angle of 90°. 7. The snap-fit non-wound insulator for dense busway conductors according to claim 1, characterized in that: the convex block (21) consists of a cylindrical bottom first boss (2101) It is coaxially stacked with the second boss (2102) on the top, wherein the edge of the first step of the second boss (2102) is rounded (2103), and the root of the second boss (2102) is connected with the first The first step of the boss (2101) forms a concave right-angle limit groove structure (2104); the aforementioned convex block (21) is completely incorporated into the concave groove (31) and is fitted with the concave groove (31) snap-fit connection; the vertical groove wall of the aforementioned concave draw-in groove (31) is radially shaped with positioning bosses (3101) arranged in a ring; The positioning fit is clamped and fully incorporated into the right-angled limit groove structure (2104), and the cross-sectional shape of the aforementioned positioning boss (3101) is an arc boss of greater than or equal to 180°. 8. The snap-fit non-wound insulator for dense busway conductors according to claim 1, characterized in that: the insulator body (1) is fastened by left and right splints (9) that are left and right axially symmetrical The component (10) is clamped, limited and positioned at the end of the intensive bus duct housing.