Lightning arrester mounting base

Abstract

The utility model relates to a lightning arrester mounting base which comprises a top plate, a bottom plate, porcelain bushings, fastening bolts and insulating bushings. Fastening bolts penetrate through assembling through holes formed in the top plate and the bottom plate and the porcelain bushings to fix the top plate and the bottom plate together. The insulating sleeve comprises a sleeve and an annular flange arranged at one end of the sleeve. A conical surface sinking groove is formed in the lower end face of the annular flange. A first conical convex ring is formed on the periphery of the upper port of the assembling through hole of the top plate. The sleeve penetrates through the assembling through hole in the top plate and the porcelain bushing and then extends to the lower end of the assembling through hole in the bottom plate. The lower end face of the annular flange is opposite to the upper end face of the top plate, and the first conical face protruding ring can stretch into a conical face sinking groove correspondingly formed above the first conical face protruding ring. The fastening bolt is sleeved with an insulating washer, and a bolt rod of the fastening bolt upwards penetrates out of the shaft cavity of the insulating sleeve and then is matched with the nut. The insulation performance of the base can be improved, and the situation that the insulation performance of the base is insufficient due to the fact that the base is affected by rainwater is effectively restrained.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lightning arrester technology field, concretely relates to a lightning arrester mounting base. BACKGROUND

[0002] The lightning arrester is fixedly installed on the cross arm of the power grid through the base, and the insulation of the base mainly relies on the porcelain sleeve arranged between the upper and lower clamps. Because the rod of the fastening bolt passes through the porcelain sleeve and forms a gap between the relative circumferential surfaces of the two, when encountering rainy and snowy weather conditions, water is likely to enter the gap, and if the water cannot be discharged in time, it will gather to form a conductor, which will cause the problem of insufficient insulation resistance of the base and the breakage of the porcelain sleeve, affecting the safety and stability of the operation of the power grid. SUMMARY

[0003] The lightning arrester mounting base can improve the insulation performance of the base and effectively inhibit the situation that the base is insufficient in insulation due to the influence of rainwater.

[0004] The technical scheme adopted by the utility model to solve the technical problem is: a lightning arrester mounting base, which comprises a top plate fixedly connected with a lightning arrester, a bottom plate fixedly connected with a cross arm, a plurality of porcelain sleeves arranged between the top plate and the bottom plate, and a plurality of fastening bolts corresponding to the porcelain sleeves. Assembly through holes corresponding to the upper and lower ports of the barrel cavities of the porcelain sleeves are formed on the top plate and the bottom plate, and nuts are arranged on the fastening bolts after the fastening bolts pass through the assembly through holes and the porcelain sleeves, so that the top plate and the bottom plate can be fixed together.

[0005] The utility model further comprises an insulating sleeve corresponding to the porcelain sleeve, and the insulating sleeve comprises a sleeve and an annular flange formed at one end of the sleeve. A conical surface recess is formed on the lower end surface of the annular flange and at the root of the sleeve.

[0006] A conical surface protruding ring I is formed around the upper port of the assembly through hole on the top plate.

[0007] The sleeve of the insulating sleeve passes through the assembly through hole on the top plate and the porcelain sleeve from top to bottom, and extends to the lower end of the assembly through hole on the bottom plate. The lower end surface of the annular flange of the insulating sleeve is opposite to the upper end surface of the top plate, and the conical surface protruding ring I can extend into the conical surface recess arranged above it.

[0008] An insulating washer is sleeved on the fastening bolt, the bolt rod passes out of the shaft cavity of the insulating sleeve from bottom to top, and an upper nut is arranged, which can press the annular flange on the upper end surface of the top plate and press the insulating washer on the lower end surface of the bottom plate.

[0009] Optionally, the outer edge of the conical surface recess extends to the outer circumferential surface of the annular flange. The outer diameter of the root of the conical surface protruding ring I is greater than the outer diameter of the annular flange.

[0010] Optionally, an insulating washer is arranged between the upper and lower end faces of the porcelain sleeve and the top plate and the bottom plate.

[0011] Optionally, a counterbore is formed at the lower end of the assembly through hole of the bottom plate.

[0012] An axial flange is formed at the outer periphery of the axial hole of the upper end face of the insulating washer. A plurality of inclined holes are arranged on the insulating washer and distributed in the circumferential direction. The outer end of the inclined hole extends to the outer periphery of the insulating washer, and the inner end extends upward to the upper end face of the insulating washer and is located on the inner side of the axial flange.

[0013] The sleeve extends downward to the counterbore, and the axial flange extends upward into the counterbore. A vertical spacing is formed between the lower end face of the sleeve and the upper end face of the insulating washer. The inner diameter of the axial flange is larger than the outer diameter of the sleeve.

[0014] Optionally, a conical flange is formed on the upper end face of the insulating washer. A radial spacing is formed between the root of the conical flange and the inner circle of the axial flange. The inner end of the inclined hole extends upward to the root of the conical flange.

[0015] A vertical spacing is formed between the lower end of the sleeve and the upper end of the conical flange.

[0016] Optionally, an annular counterbore is formed on the upper end face of the insulating washer between the root of the conical flange and the inner circle of the axial flange. The inner end of the inclined hole extends upward to the root of the annular counterbore.

[0017] Optionally, an annular counterbore is formed on the upper end face of the insulating washer on the inner side of the axial flange. The inner end of the inclined hole extends upward to the root of the annular counterbore.

[0018] The beneficial effects of the utility model are: the utility model can improve the insulation performance of the base, effectively inhibit the situation that the base is insufficient in insulation due to the influence of rainwater. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure of the utility model is shown in the figure.

[0020] Figure 2 The Figure 1 The local enlarged structure of A in the figure is shown.

[0021] Figure 3 The utility model is shown in the figure.

[0022] Figure 4 The cross-sectional structure of the insulating washer is shown in the figure.

[0023] Figure 5 The top view structure of the insulating washer is shown in the figure.

[0024] In the figure: 10 arrester; 20 top plate, 21 conical convex ring one; 30 bottom plate, 31 fixed part, 32 counterbore; 40 porcelain sleeve; 50 insulation sleeve, 51 sleeve, 52 annular flange, 521 conical sink; 60 fastening bolt, 61 nut; 70 insulation washer, 71 conical convex ring two, 72 axial flange, 73 annular sink, 74 inclined hole. DETAILED DESCRIPTION

[0025] The structure, proportion, size and the like shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and do not have technical substantive significance, and any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope covered by the disclosed technical content. Meanwhile, the terms such as "upper", "lower", "front", "rear", "intermediate" and the like cited in the specification are only for the convenience of clear understanding of the description, and are not used to limit the scope of the utility model that can be implemented, and the change or adjustment of the relative relationship, without substantial change of the technical content, is also regarded as the scope of the utility model that can be implemented.

[0026] As Figures 1 to 5 shown, an arrester mounting base, comprising a top plate 20 fixedly connected with an arrester 10, a bottom plate 30 fixedly connected with a cross arm (a fixed part 31 for establishing a fixed connection relationship with the cross arm is arranged on the bottom plate 30), a plurality of porcelain sleeves 40 arranged between the top plate 20 and the bottom plate 20, and a plurality of fastening bolts 60 corresponding to the porcelain sleeves 40. A fitting through hole corresponding to the upper and lower ports of the barrel cavity of the porcelain sleeve 40 is formed on the top plate 20 and the bottom plate 30, the fastening bolt 60 passes through the fitting through hole on the top plate 20, the fitting through hole on the bottom plate 30, and the porcelain sleeve 40, and is configured with a nut 60, so as to fix the top plate 20 and the bottom plate 30 together.

[0027] It also comprises a plurality of insulation sleeves 50 corresponding to the porcelain sleeves 40.

[0028] The insulation sleeve 50 comprises a sleeve 51 and an annular flange 52 formed on the upper end of the sleeve 51. A conical sink 521 is formed on the lower end face of the annular flange 52 and corresponds to the root of the sleeve 51.

[0029] A conical convex ring one 21 is formed on the periphery of the upper port of the fitting through hole on the top plate 20.

[0030] The sleeve 51 of the insulating sleeve 50 passes through the assembly hole on the top plate 20 and the porcelain sleeve 40 from top to bottom and extends to the lower end of the assembly hole on the bottom plate 30. The lower end surface of the annular flange 52 of the insulating sleeve 50 is opposite to the upper end surface of the top plate 20, and the conical convex ring one 21 can extend into the conical concave groove 521 arranged above it.

[0031] The insulating washer 70 is sleeved on the bolt rod of the fastening bolt 62, the bolt rod passes through the shaft cavity of the insulating sleeve 50 from bottom to top, and the nut 61 is arranged above, so that the annular flange 52 is pressed on the upper end surface of the top plate 20, and the insulating washer 70 is pressed on the lower end surface of the bottom plate 30.

[0032] The outer edge of the conical concave groove 521 extends to the outer peripheral surface of the annular flange 52. The outer diameter of the root of the conical convex ring one 21 is greater than the outer diameter of the annular flange 52.

[0033] Insulating washers are arranged between the upper and lower end surfaces of the porcelain sleeve 40 and the opposite surfaces of the top plate 20 and the bottom plate 30. The inner diameter of the shaft hole of the insulating washer is not less than the inner diameter of the cylindrical cavity of the porcelain sleeve 40.

[0034] The counterbore 32 is formed at the lower end of the assembly hole on the bottom plate 30.

[0035] The conical convex ring two 71 is formed on the upper end surface of the insulating washer 70 around the shaft hole thereof, the axial flange 73 is formed on the outer periphery of the conical convex ring two 71, and the annular concave groove 73 is formed between the root of the conical convex ring two 71 and the inner ring of the axial flange 73.

[0036] A plurality of inclined holes 74 are arranged on the wall of the insulating washer 70 and distributed in the circumferential direction. The outer end of the inclined hole 74 extends to the outer peripheral surface of the insulating washer 70, and the inner end of the inclined hole 74 extends upward to the root of the annular concave groove 73.

[0037] The free end of the sleeve 51 of the insulating sleeve 50 extends downward to the counterbore 32, and the axial flange 72 extends upward into the counterbore 32. A vertical spacing is formed between the lower end surface of the sleeve 51 and the upper end of the conical convex ring two 71. The inner diameter of the axial flange 72 is greater than the outer diameter of the sleeve 51.

[0038] In the technical scheme of the utility model, with the corresponding matching of the conical surface sink groove 521 on the annular flange 52 and the conical surface convex ring one 21, effective isolation between the upper end surface of the top plate 20 and the outer circumferential surface of the fastening bolt 60 can be realized, which helps to prevent rainwater from invading the inner and outer circumferential surfaces of the sleeve 51 from the upper end surface of the top plate 20. The associated structures such as the sink groove 32 and the axial flange 72 are arranged, so that once the rainwater invades the outer wall surface side of the fastening bolt 60, the rainwater can flow into the axial flange 72 and be discharged, and the rainwater can be effectively prevented from gathering in a large amount and the bottom plate 30 and the fastening bolt 60 can be effectively isolated. The conical surface convex ring two 71 and the annular sink groove 73 are arranged, and the once-invaded rainwater can be guided, so that the rainwater flows and gathers in a direction away from the outer circumferential surface of the fastening bolt 60 and the nut, and finally can be smoothly discharged to the outside.

[0039] The above embodiment only exemplarily illustrates the principle and effect of the utility model, and is not used to limit the utility model. The utility model can be improved in many aspects without departing from the general idea, and the above embodiment can be modified or changed by those skilled in the art without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical idea disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A lightning arrester mounting base, comprising a top plate fixedly connected with a lightning arrester, a bottom plate fixedly connected with a cross arm, a plurality of porcelain bushings arranged between the top plate and the bottom plate, and a plurality of fastening bolts corresponding to the porcelain bushings; assembly through holes corresponding to the cylinder cavities of the porcelain bushings are formed on the top plate and the bottom plate, and nuts are arranged on the fastening bolts after the fastening bolts pass through the assembly through holes and the porcelain bushings, so as to fix the top plate and the bottom plate together; characterized in that: The insulating sleeve includes a sleeve and an annular flange arranged at one end of the sleeve; a tapered surface groove is formed on the lower end surface of the annular flange; A tapered surface convex ring I is formed on the upper end of the assembly through hole on the top plate; The sleeve passes through the assembly through hole on the top plate, the porcelain sleeve and extends to the lower end of the assembly through hole on the bottom plate; the lower end surface of the annular flange is opposite to the upper end surface of the top plate, and the tapered surface convex ring I can extend into the tapered surface groove arranged above it; The fastening bolt is sleeved with an insulating washer, and the bolt rod passes out of the shaft cavity of the insulating sleeve and matches with the nut.

2. The lightning arrester mounting base according to claim 1, characterized in that: The outer edge of the tapered surface groove extends to the outer peripheral surface of the annular flange; the outer diameter of the root of the tapered surface convex ring I is greater than the outer diameter of the annular flange.

3. The lightning arrester mounting base of claim 1, wherein: Insulating washers are arranged between the upper and lower end surfaces of the porcelain sleeve and the top plate and the bottom plate; the shaft hole inner diameter of the insulating washer is not less than the cylinder cavity inner diameter of the porcelain sleeve.

4. The surge arrester mounting base of claim 1, wherein: A counterbore is formed at the lower end of the assembly through hole on the bottom plate; An axial flange is formed on the upper end surface of the insulating washer and around the shaft hole; a plurality of inclined holes are arranged on the insulating washer and distributed in the circumferential direction; the outer end of the inclined hole extends to the outer peripheral surface of the insulating washer, and the inner end extends upward to the upper end surface of the insulating washer and is opposite to the inner side of the axial flange; The sleeve extends downward to the counterbore, and the axial flange extends upward into the counterbore; a vertical spacing is formed between the lower end surface of the sleeve and the upper end surface of the insulating washer; the inner diameter of the axial flange is greater than the outer diameter of the sleeve.

5. The lightning arrester mounting base according to claim 4, characterized in that: A tapered surface convex ring II is formed on the upper end surface of the insulating washer; a radial spacing is formed between the root of the tapered surface convex ring II and the inner ring root of the axial flange; the inner end of the inclined hole extends upward to the root of the tapered surface convex ring II; A vertical spacing is formed between the lower end of the sleeve and the upper end of the tapered surface convex ring II.

6. The surge arrester mounting base of claim 5, wherein: An annular groove is formed on the upper end surface of the insulating washer between the root of the tapered surface convex ring II and the inner ring of the axial flange; the inner end of the inclined hole extends upward to the root of the annular groove.

7. The surge arrester mounting base of claim 4, wherein: An annular groove is formed on the upper end surface of the insulating washer on the inner side of the axial flange; the inner end of the inclined hole extends upward to the root of the annular groove.

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