CN218100833U - Insulator - Google Patents

Abstract

The utility model discloses an insulator, including stereoplasm sheath and plug, the stereoplasm sheath is established in the periphery of plug along the axial cover of plug, the one end of plug is equipped with the first gold utensil that is used for connecting the high-voltage cable, the other end of plug is equipped with the second gold utensil that is used for connecting the low-voltage cable, offer the first inner chamber that is used for holding the plug tip and be used for holding the first recess of stereoplasm sheath tip on the interior terminal surface of first gold utensil, first recess is located the periphery of first inner chamber, first gold utensil is through the periphery of first inner chamber crimping at the plug, first gold utensil cooperatees with the stereoplasm sheath through first recess, offer the second inner chamber that is used for holding the plug tip and the second recess that is used for holding the stereoplasm sheath tip on the interior terminal surface of second gold utensil, the second recess is located the periphery of second inner chamber, the second gold utensil is through the periphery of second inner chamber crimping at the plug, the second gold utensil cooperatees with the stereoplasm sheath through the second recess, this connection is reliable, the difficult fracture of stereoplasm sheath.

Description

Insulator

Technical Field

The utility model is used for electrical equipment insulating technical field especially relates to an insulator.

Background

At present, electric energy is increasingly becoming an important energy guarantee for successfully carrying out industrial production, in order to guarantee the electricity utilization of industrially developed areas, the electric energy is often required to be transmitted from areas with abundant resource reserves to industrially developed areas, in the process of power transmission, an insulator is an important guarantee for realizing reliable external insulation, and the insulators widely used at present are glass insulators, porcelain insulators and composite insulators, wherein the composite insulators have unique application advantages under high-voltage grade power transmission lines and heavily polluted environments due to light weight, easy processing and excellent pollution resistance, but with the large application of the composite insulators, problems are exposed during operation, for example, a long-term bird pecking can directly cause a soft sheath of the composite insulator to be completely pecked through, so that a core rod wrapped by the soft sheath is exposed, and finally the exposed core rod is brittle under environmental corrosion to cause serious power accidents, therefore, the bird pecking problem once becomes a focus of high attention of the electric power department, and the electric power department has tried various measures for physical intervention, such as setting bird-proof pricks, driving birds with ultrasonic waves, wrapping a hard cover shell on the periphery of a soft cover, and the like, but the measures cannot achieve better application effects because of inconvenience in installation, processing, maintenance and the like, so that a new solution is to use a hard cover material to replace the soft cover material of the original composite insulator, typically, the hard cover is a cover made of alicyclic epoxy resin, but the material has higher hardness and often has certain brittleness, so that the hard cover is prone to crack under the stimulation of temperature or under the action of load because the elastic modulus of the hard cover and the hardware is different at the end part where the hard cover is connected with the hardware in the processing and using processes of the insulator, the existing hard insulator adopts a connection mode that a hard sheath is directly poured or injected at the end part of a hardware fitting to wrap the hardware fitting, and when the connection mode is adopted, in the processing or using process, because the hard alicyclic epoxy resin sheath and the metal fitting have far difference in thermal expansion coefficient and elastic modulus, the hard sheath wrapped at the periphery of the hardware fitting is easy to crack due to the stimulation of thermal expansion and cold contraction or tensile load.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide an insulator, its structure is firm, and the tip is difficult for the fracture.

The utility model provides a technical scheme that its technical problem adopted is:

an insulator comprises a hard sheath and a core rod, wherein the hard sheath is sleeved on the periphery of the core rod along the axial direction of the core rod, a first hardware used for connecting a high-voltage cable is arranged at one end of the core rod, a second hardware used for connecting a low-voltage cable is arranged at the other end of the core rod, the outer end of the first hardware is a first connecting end, a first inner cavity used for containing the end part of the core rod and a first groove used for containing the end part of the hard sheath are arranged on the inner end face of the first hardware, the first hardware is in compression joint with the periphery of the core rod through the first inner cavity, the first hardware is matched with the hard sheath through the first groove, the outer end of the second hardware is a second connecting end, a second inner cavity used for containing the end part of the core rod and a second groove used for containing the end part of the hard sheath are arranged on the inner end face of the second hardware, the second groove is arranged on the periphery of the second inner cavity, the second hardware is in compression joint with the periphery of the core rod through the second inner cavity, and the second hardware is matched with the hard sheath through the second groove.

Preferably, the periphery of the hard sheath is sleeved with a hard umbrella skirt, and the hard umbrella skirt and the hard sheath are of an injection molding integrated structure.

Preferably, the near end of the hard umbrella skirt is connected with the periphery of the hard sheath, the far end of the hard umbrella skirt extends outwards along the radial direction of the mandrel, the thickness of the hard umbrella skirt is gradually reduced from the near end to the far end, the thickness of the near end of the hard umbrella skirt is 1-3 mm, and the thickness of the far end of the hard umbrella skirt is 3-8 mm.

Preferably, the hard shed comprises a hard first shed and a hard second shed, the radial dimension of the first shed along the mandrel is larger than the radial dimension of the second shed along the mandrel, and the first shed and the second shed are alternately arranged along the axial direction of the mandrel.

Preferably, a first sealing part is arranged in the first groove, one end of the first sealing part is connected with the inner wall of the first hardware fitting, the other end of the first sealing part is abutted against the outer wall of the hard sheath, a second sealing part is arranged in the second groove, one end of the second sealing part is connected with the inner wall of the second hardware fitting, and the other end of the second sealing part is abutted against the outer wall of the hard sheath.

Preferably, the first sealing part and the second sealing part are both sealing gaskets, a first clamping groove for mounting the first sealing part is formed in the inner wall of the first hardware fitting, and a second clamping groove for mounting the second sealing part is formed in the inner wall of the second hardware fitting.

Preferably, the inner wall of the hard sheath is tightly connected with the outer wall of the mandrel, the first groove is communicated with the first inner cavity, the radial dimension of the first groove along the mandrel is larger than the radial dimension of the first inner cavity along the mandrel, the second groove is communicated with the second inner cavity, and the radial dimension of the second groove along the mandrel is larger than the radial dimension of the second inner cavity along the mandrel.

Preferably, the thickness of the hard sheath is 4-8 mm, and the hard sheath is a hard resin sheath.

Preferably, the axial length of the first hardware fitting connected with the core rod through the first inner cavity is 20-80 mm, the axial length of the first hardware fitting connected with the hard sheath through the first groove is 10-30 mm, the axial length of the second hardware fitting connected with the core rod through the second inner cavity is 20-80 mm, and the axial length of the second hardware fitting connected with the hard sheath through the second groove is 10-30 mm.

Preferably, the inner diameters of the first inner cavity and the second inner cavity are 20-32 mm, and the inner diameters of the first groove and the second groove are 28-40 mm.

One of the above technical solutions has at least one of the following advantages or beneficial effects: this insulator is through offering the first inner chamber that is used for holding the plug tip and the first recess that is used for holding the stereoplasm sheath tip on the interior terminal surface of first gold utensil, first gold utensil is in the periphery of plug through first inner chamber crimping, first gold utensil cooperatees through first recess and stereoplasm sheath, the same is good at, be equipped with second inner chamber and second recess on the second gold utensil, first gold utensil, the second gold utensil is the connected mode of crimping and then realizes reliable connection between them with the plug, first gold utensil, the connected mode that second gold utensil and stereoplasm sheath are non-crimping, in order to avoid the use in the hard sheath fracture that leads to because of expend with heat and contract with cold or tensile load, avoid damaging the stereoplasm sheath because of the crimping, and stereoplasm sheath surface hardness is big, mechanical strength is high, can allow the circuit maintenance workman to trample after the installation is used, the maintenance and the maintenance of insulator and transmission line have been made things convenient for, this very big improvement the tolerance of insulator to the connection interface defect.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is an enlarged view at a in fig. 1.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the present invention, if there is a description of directions (up, down, left, right, front and back), it is only for convenience of description of the technical solution of the present invention, and it does not indicate or suggest that the indicated technical features must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present invention.

In the utility model, the meaning of "several" is one or more, the meaning of "a plurality of" is more than two, "greater than", "less than", "exceed" and so on are understood as not including the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is any description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the present invention, unless otherwise explicitly defined, the terms "setting," "installing," "connecting," and the like are to be understood in a broad sense, and may be directly connected or indirectly connected through an intermediate medium, for example; can be fixedly connected, can be detachably connected and can be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

Wherein, fig. 2 shows a reference direction coordinate system of the embodiment of the present invention, and the following describes the embodiment of the present invention with reference to the direction shown in fig. 2.

An embodiment of the present invention provides an insulator, referring to fig. 1 and 2, the insulator includes a hard sheath 300 and a core rod 500, the hard sheath 300 is sleeved on the periphery of the core rod 500 along an axial direction of the core rod 500, one end of the core rod 500 is provided with a first fitting 100 for connecting a high-voltage cable, the other end of the core rod 500 is provided with a second fitting 400 for connecting a low-voltage cable, an outer end of the first fitting 100 is a first connection end 110, referring to fig. 2, an inner end surface of the first fitting 100 is provided with a first inner cavity 120 for accommodating an end of the core rod 500 and a first groove 130 for accommodating an end of the hard sheath 300, the first groove 130 is located on the periphery of the first inner cavity 120, the first fitting 100 is crimped on the periphery of the core rod 500 through the first inner cavity 120, the first fitting 100 is matched with the hard sheath 300 through the first groove 130, it can be understood that, similarly, the second fitting 400 is a second connection end 410, the inner end surface of the second hardware fitting 400 is provided with a second inner cavity 420 for accommodating the end part of the core rod 500 and a second groove 430 for accommodating the end part of the hard sheath 300, the second groove 430 is positioned at the periphery of the second inner cavity 420, the second hardware fitting 400 is crimped at the periphery of the core rod 500 through the second inner cavity 420, the second hardware fitting 400 is matched with the hard sheath 300 through the second groove 430, the first hardware fitting 100, the second hardware fitting 400 and the core rod 500 are in a crimping connection mode so as to realize reliable connection of the two, the first hardware fitting 100, the second hardware fitting 400 and the hard sheath 300 are in a non-crimping connection mode so as to avoid cracking of the hard sheath 300 caused by expansion and contraction or tensile load in the using process, avoid damage to the hard sheath 300 due to crimping, the hard sheath 300 has large surface hardness and high mechanical strength, and after installation and use, a line maintenance worker can be allowed to tread, thereby facilitating the maintenance and the maintenance of the insulator and the transmission line, the insulator avoids the problem that deformation caused by inconsistent thermal expansion coefficients and elastic moduli of the hardware fitting and the hard sheath and further the sheath is easy to crack in the traditional hard insulator, even if the interface of the first hardware fitting 100, the second hardware fitting 400 and the hard sheath 300 or the interface of the hard sheath 300 and the core rod 500 are partially defective in the using process, the connection position can not be locally and seriously discharged and heated due to local defects because of the internal equipotential effect of the first hardware fitting 100 or the second hardware fitting 400, and further the tolerance of the insulator to the defects of the connection interface can be greatly improved.

Referring to fig. 1 and 2, a hard shed 200 is sleeved on the periphery of a hard sheath 300, the hard shed 200 and the hard sheath 300 are in an injection molding integrated structure, so that the insulator product has excellent overall mechanical and electrical properties, the number of the hard sheds 200 is 10-30, preferably, the glass transition temperature of the hard sheds 200 and the surface hardness of the hard sheath 300 is not lower than 30 ℃ and the surface hardness is not lower than 90A.

Referring to fig. 2, the proximal end of the hard shed 200 is connected to the outer circumference of the hard sheath 300, the distal end of the hard shed 200 extends radially outward along the mandrel 500, the thickness of the hard shed 200 decreases gradually from the proximal end to the distal end, in some embodiments, the thickness of the proximal end of the hard shed 200 is 1-3 mm, and the thickness of the distal end of the hard shed 200 is 3-8 mm.

Referring to fig. 1, the rigid shed 200 includes a rigid first shed 210 and a rigid second shed 220, the first shed 210 having a greater dimension along the radial direction of the mandrel 500 than the second shed 220 having a greater dimension along the radial direction of the mandrel 500, the first shed 210 and the second shed 220 being disposed alternately along the axial direction of the mandrel 500, it being understood that in some embodiments, the rigid shed 200 may also include three sheds having different sizes, the three sheds being disposed alternately along the axial direction of the mandrel 500.

Referring to fig. 2, a first sealing member 600 is disposed in the first groove 130, one end of the first sealing member 600 is connected to the inner wall of the first hardware fitting 100, and the other end of the first sealing member 600 abuts against the outer wall of the hard sheath 300, it can be understood that a second sealing member 700 is disposed in the second groove 430, one end of the second sealing member 700 is connected to the inner wall of the second hardware fitting 400, and the other end of the second sealing member 700 abuts against the outer wall of the hard sheath 300, so as to improve the sealing effect.

As the utility model discloses preferred embodiment, first seal part 600 and second seal part 700 are seal ring, are equipped with the first draw-in groove that is used for installing first seal part 600 on the inner wall of first gold utensil 100, are equipped with the second draw-in groove that is used for installing second seal part 700 on the inner wall of second gold utensil 400, and is preferred, and the quantity of first draw-in groove and second draw-in groove is more than two.

In some embodiments, the inner wall of the rigid sheath 300 is tightly connected to the outer wall of the mandrel 500, the first groove 130 is in communication with the first inner cavity 120, the first groove 130 has a larger dimension along the radial direction of the mandrel 500 than the first inner cavity 120, the second groove 430 is in communication with the second inner cavity 420, and the second groove 430 has a larger dimension along the radial direction of the mandrel 500 than the second inner cavity 420.

It can be understood that the first groove 130 may be an annular groove, and both ends of the hard sheath 300 extend into the first hardware 100 and the second hardware 400, so as to avoid the hard sheath 300 from cracking due to thermal expansion and contraction or tensile load during use.

In some embodiments, the thickness of the hard sheath 300 is 4-8 mm, the hard sheath 300 is a hard resin sheath, the surface hardness is high, the mechanical strength is high, and after installation and use, line maintenance workers can be allowed to tread, so that the maintenance and the repair of the insulator and the power transmission line are facilitated.

As the utility model discloses preferred embodiment, the axial length that first gold utensil 100 is connected through first inner chamber 120 and plug 500 is 20 ~ 80mm, the axial length that first gold utensil 100 is connected through first recess 130 and hard sheath 300 is 10 ~ 30mm, the axial length that second gold utensil 400 is connected through second inner chamber 420 and plug 500 is 20 ~ 80mm, the axial length that second gold utensil 400 is connected through second recess 430 and hard sheath 300 is 10 ~ 30mm, guarantee first gold utensil 100, second gold utensil 400 and hard sheath 300 and plug 500 firm being connected.

Preferably, the inner diameters of the first and second inner cavities 120 and 420 are 20 to 32mm, and the inner diameters of the first and second grooves 130 and 430 are 28 to 40mm.

Preferably, the core rod 500 is a glass fiber reinforced epoxy resin core rod, the diameter of the core rod 500 is 20 to 60mm, and the height of the whole insulator is 800 to 1200mm.

In the description of the present specification, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.

Claims (10)

1. An insulator, its characterized in that: including stereoplasm sheath and plug, the stereoplasm sheath is followed the axial cover of plug is established the periphery of plug, the one end of plug is equipped with the first gold utensil that is used for connecting the high-voltage cable, the other end of plug is equipped with the second gold utensil that is used for connecting the low-voltage cable, first gold utensil outer end is first link, offer on the interior terminal surface of first gold utensil and be used for holding the first inner chamber of plug tip and being used for holding the first recess of stereoplasm sheath tip, first recess is located the periphery of first inner chamber, first gold utensil passes through first recess with the stereoplasm sheath cooperatees, second outer end is the second link, offer on the interior terminal surface of second gold utensil and be used for holding the second inner chamber of plug tip and being used for holding the second recess of stereoplasm sheath tip, the second recess is located the periphery of second inner chamber, the second gold utensil passes through the crimping of second inner chamber is in the periphery of plug, the second stereoplasm passes through the second recess with the second gold utensil cooperatees.

2. An insulator according to claim 1, wherein: the periphery of the hard sheath is sleeved with a hard umbrella skirt, and the hard umbrella skirt and the hard sheath are of an injection molding integrated structure.

3. An insulator according to claim 2, wherein: the hard umbrella skirt is characterized in that the near end of the hard umbrella skirt is connected with the periphery of the hard sheath, the far end of the hard umbrella skirt extends outwards along the radial direction of the core rod, the thickness of the hard umbrella skirt is gradually reduced from the near end to the far end, the thickness of the near end of the hard umbrella skirt is 1-3 mm, and the thickness of the far end of the hard umbrella skirt is 3-8 mm.

4. An insulator according to claim 2, wherein: the hard umbrella skirt comprises a hard first umbrella skirt and a hard second umbrella skirt, the radial size of the first umbrella skirt along the core rod is larger than that of the second umbrella skirt along the core rod, and the first umbrella skirt and the second umbrella skirt are alternately arranged along the axial direction of the core rod.

5. An insulator according to claim 1, wherein: the improved hard protective sleeve is characterized in that a first sealing part is arranged in the first groove, one end of the first sealing part is connected with the inner wall of the first hardware fitting, the other end of the first sealing part is abutted against the outer wall of the hard protective sleeve, a second sealing part is arranged in the second groove, one end of the second sealing part is connected with the inner wall of the second hardware fitting, and the other end of the second sealing part is abutted against the outer wall of the hard protective sleeve.

6. An insulator according to claim 5, wherein: the first sealing part and the second sealing part are both sealing gaskets, a first clamping groove used for installing the first sealing part is formed in the inner wall of the first hardware fitting, and a second clamping groove used for installing the second sealing part is formed in the inner wall of the second hardware fitting.

7. An insulator according to claim 1, wherein: the inner wall of the hard sheath is tightly connected with the outer wall of the mandrel, the first groove is communicated with the first inner cavity, the radial size of the first groove along the mandrel is larger than that of the first inner cavity along the mandrel, the second groove is communicated with the second inner cavity, and the radial size of the second groove along the mandrel is larger than that of the second inner cavity along the mandrel.

8. An insulator according to claim 1, wherein: the thickness of the hard sheath is 4-8 mm, and the hard sheath is a hard resin sheath.

9. An insulator according to claim 1, wherein: the axial length of the first hardware fitting connected with the core rod through the first inner cavity is 20-80 mm, the axial length of the first hardware fitting connected with the hard sheath through the first groove is 10-30 mm, the axial length of the second hardware fitting connected with the core rod through the second inner cavity is 20-80 mm, and the axial length of the second hardware fitting connected with the hard sheath through the second groove is 10-30 mm.

10. An insulator according to claim 1, wherein: the inner diameters of the first inner cavity and the second inner cavity are 20-32 mm, and the inner diameters of the first groove and the second groove are 28-40 mm.

Images