CN109505506B

CN109505506B - Special insulating ladder of electric power

Info

Publication number: CN109505506B
Application number: CN201811616601.XA
Authority: CN
Inventors: 石增辉; 王洪旭; 刘颖; 尤培信; 彭东丽; 陈凤伟
Original assignee: Feixian County Power Supply Co Of State Grid Shandong Electric Power Co
Current assignee: FEIXIAN POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRONIC POWER COMPANY
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2020-04-07
Anticipated expiration: 2038-12-28
Also published as: CN109505506A

Abstract

The invention belongs to the technical field of electric power supplies, and discloses an insulating ladder special for electric power, which comprises an upper ladder body and a lower ladder body, wherein the upper ladder body and the lower ladder body are respectively provided with a cross brace; the upper ladder body and the lower ladder body are connected through a connecting plate; corresponding bolts and slots are arranged between the upper ladder body and the lower ladder body; one side of the slot is provided with a slideway; a triangular block in sliding connection is arranged in the slide way; the spring in elastic connection is arranged behind the triangular block; the triangular block is provided with a handle; insulating sleeves are sleeved outside the upper ladder body and the lower ladder body; and an anti-slip sleeve is sleeved outside the cross arm. The folding ladder has a reasonable structure, and the upper ladder body and the lower ladder body can be folded, so that the folding ladder is convenient to transport and place; the upper ladder body and the lower ladder body can be folded into any common included angle and fixed, so that the ladder is convenient to use indoors; go up the ladder body, down the ladder body and the stull adopts magnesium alloy material, and the structure is more firm, the effectual technical problem who solves the insulating ladder of prior art and exist.

Description

Special insulating ladder of electric power

Technical Field

The invention belongs to the technical field of electric power supplies, and particularly relates to an insulating ladder special for electric power.

Background

The electric power insulating ladder is mainly used during electric power operation, and requires high structural strength and good insulating property. The electric insulating ladder in the prior art mainly comprises two types, one type is an insulating ladder made of bamboo rod bodies, the insulating ladder has a good insulating effect, but the rod bodies are long and inconvenient to carry, are easy to break due to falling and collision, and are easy to rot after a long time; the other kind adopts the aluminum alloy preparation, and the outside brush has insulating varnish's insulating ladder, and this kind of insulating ladder receives to fall to bump can not break at once, but uses slowly bending deformation for a long time, and structural strength is still not high, and the time has been of a specified duration insulating varnish can wearing and tearing reduce, and insulating effect variation. The insulating ladder made of partial aluminum alloy can be folded in the middle so as to be convenient to carry; the folding department is equipped with the lantern ring that corresponds, and is fixed through the bolt connection, because bolt and lantern ring are outer to be protruding, scratch easily to need make a round trip to get and put the bolt, it is very inconvenient to use. Magnesium alloy is the lightest metal structural material, and has a series of advantages of low density, high specific strength and specific stiffness, good impact resistance and the like, but when used as a structural material, the application of the magnesium alloy is greatly limited due to the fact that the hardness, the strength, the corrosion resistance and the wear resistance are not ideal.

Disclosure of Invention

The invention aims to solve the technical problems of inconvenient carrying, single use, poor insulation effect and low structural strength of an insulation ladder in the prior art, and provides a special insulation ladder for electric power to solve the defects in the prior art.

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

an insulating ladder special for electric power comprises an upper ladder body and a lower ladder body which are respectively provided with a cross brace; the upper ladder body and the lower ladder body are connected through a connecting plate; the connecting plates are arranged on the inner sides of the upper ladder body and the lower ladder body; the connecting plate is respectively connected with the upper ladder body and the lower ladder body in a rotating way through a rotating shaft; corresponding bolts and slots are arranged between the upper ladder body and the lower ladder body; one side of the slot is provided with a slideway; a triangular block in sliding connection is arranged in the slide way; the outer side surface of the triangular block is an inclined surface; the spring in elastic connection is arranged behind the triangular block; the triangular block is provided with a handle; the outer surfaces of the upper ladder body, the lower ladder body and the cross braces are respectively brushed with anticorrosive insulating paint; insulating sleeves are sleeved outside the upper ladder body and the lower ladder body; and an anti-slip sleeve is sleeved outside the cross arm.

Furthermore, two sides of the upper ladder body and two sides of the lower ladder body are respectively provided with a positioning plate and a positioning pin; one end of the positioning plate is rotatably connected to the upper ladder body; the positioning plate is provided with a row of clamping grooves connected with the positioning pins; the clamping groove is a semicircular groove, a circle of concave ring is arranged on the inner side of the positioning pin, and the clamping groove is buckled on the concave ring.

Furthermore, the upper ladder body, the lower ladder body and the cross braces are made of magnesium alloy materials, and hollow cavities are arranged in the middle; the upper ladder body and the lower ladder body are thickened at the joint with other parts.

Furthermore, the connecting plate has the damping with the pivot of going up the ladder body and being connected with lower ladder body, and the connecting plate can not rotate because of self gravity with last ladder body and lower ladder body to do not have other directions except that rotate and rock.

Furthermore, the bottom of the slot is provided with a groove corresponding to the bolt.

Furthermore, go up the ladder body and lower ladder body from the centre disconnection, the connected mode of disconnection department is the same with the connected mode of going up the ladder body and lower ladder body, goes up the ladder body and divides into 4 groups fifty percent discount with lower ladder body, adopts ordinary riding vehicle alright transportation.

As another invention point of the invention, the invention also relates to the improvement of the materials of the upper ladder body, the lower ladder body and the cross braces, wherein the upper ladder body, the lower ladder body and the cross braces are made of magnesium alloy materials;

specifically, the magnesium alloy material is prepared according to the following process:

taking 100 parts of magnesium ingot, 20 parts of magnesium-manganese master alloy MgMn5, 10 parts of copper-magnesium master alloy CuMg10, 8 parts of magnesium-zirconium master alloy MgZr30 and 5 parts of magnesium-yttrium master alloy MgY30 in parts by weight;

taking a magnesium ingot, melting the magnesium ingot under the protection of argon gas, heating to 750 ℃ to obtain a Mg melt, then sequentially adding a magnesium-manganese intermediate alloy MgMn5, a copper-magnesium intermediate alloy CuMg10, a magnesium-zirconium intermediate alloy MgZr30 and a magnesium-yttrium intermediate alloy MgY30, and continuously refining for 30min under the protection of argon gas to obtain an alloy liquid;

pouring the alloy liquid into a mold, naturally cooling, and demolding to obtain an ingot; putting the cast ingot into a heating furnace, heating to 350 ℃, preserving heat for 60min, and then putting into water with the temperature of 50 ℃ for quenching; putting the quenched cast ingot into an aging furnace, heating to 180 ℃, preserving heat for 3 hours, and naturally cooling to room temperature after discharging; and then performing extrusion forming by a press machine to obtain the composite material.

Compared with the prior art, the invention has the advantages that the following aspects are mainly included but not limited:

the folding ladder has a reasonable structure, and the upper ladder body and the lower ladder body can be folded, so that the folding ladder is convenient to transport and place; the upper ladder body and the lower ladder body can be folded into any common included angle and fixed, so that the ladder is convenient to use indoors; go up the ladder body, down the ladder body and the stull adopts magnesium alloy material, and the structure is more firm, the effectual technical problem who solves the insulating ladder of prior art and exist. According to the invention, by adding the master alloy element into the magnesium matrix, the problems of burning loss, difficulty in melting high-melting-point alloy and the like are avoided, the dispersion strengthening effect and the solid solution strengthening effect can be achieved, and the mechanical strength, hardness, wear resistance and corrosion resistance are greatly improved; zirconium element can improve the corrosion resistance and high temperature resistance of the magnesium alloy; the copper, manganese and yttrium elements can enhance the strength, hardness, corrosion resistance and thermal stability of the magnesium alloy, refine crystal grains, purify melt, improve purity, reduce the nonuniformity of the crystal grains, enable the organization structure to be more uniform and compact, and effectively improve the processing and casting performance of the magnesium alloy; the yttrium element can also have a strong combination effect with impurity elements such as oxygen, hydrogen, nitrogen, sulfur, iron and the like in the raw material alloy, can reduce gas and impurities in the alloy, improves the form of the impurities, enables the impurities to tend to be spheroidized, is favorable for removing the impurities and the gas, and also has a melt purification effect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic top view of the lower ladder body of the present invention;

fig. 3 is a schematic view of the bending structure of the present invention.

In the figure, the ladder comprises an upper ladder body 1, an upper ladder body 2, an insulating sleeve 3, an anti-skidding sleeve 4, a cross brace 5, a connecting plate 6, a bolt 7, a rotating shaft 8, a slot 9, a lower ladder body 10, a slideway 11, a spring 12, a handle 13, a hollow cavity 14, a groove 15, a triangular block 16, a positioning plate 17, a positioning pin 18 and a clamping groove.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and in the description of the present invention, the embodiments described below are a part of the embodiments of the present invention, but not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

According to fig. 1, 2 and 3, an insulating ladder special for electric power comprises an upper ladder body 1 and a lower ladder body 9 which are respectively provided with a cross brace 4; the upper ladder body 1 and the lower ladder body 9 are connected through a connecting plate 5; the connecting plate 5 is arranged on the inner sides of the upper ladder body and the lower ladder body; the connecting plate 5 is respectively connected with the upper ladder body and the lower ladder body in a rotating way through a rotating shaft 7; a corresponding bolt 6 and a corresponding slot 8 are arranged between the upper ladder body and the lower ladder body; one side of the slot is provided with a slideway 10; a triangular block 15 in sliding connection is arranged in the slideway 10; the outer side surface of the triangular block is an inclined surface; the spring 11 which is elastically connected is arranged behind the triangular block; the triangular block is provided with a handle 12; the outer surfaces of the upper ladder body, the lower ladder body and the cross braces are respectively brushed with anticorrosive insulating paint; the insulating sleeves 2 are sleeved outside the upper ladder body and the lower ladder body; the outside of the cross arm is sleeved with an anti-slip sleeve 3.

During the use, go up the ladder body and rotate with lower ladder body through connecting plate 5 and pivot 7 and buckle, and bolt 6 inserts from slot 8's side, behind 6 touching three hornblocks of bolt, because the lateral surface of three hornblocks is the inclined plane, so three hornblocks slide to the slide inboard under the extrusion of bolt 6, break away from three hornblocks after 6 complete entering slot 8 of bolt, three hornblocks return under spring 11's elasticity, it is fixed to surround on four sides to insert 6. After the use, stir the handle on the triangle piece, the triangle piece removes to the slide in, buckles and goes up the ladder body and lower ladder body, and bolt 6 breaks away from in slot 8.

Go up the ladder body and can rotate the fifty percent discount with lower ladder body through connecting plate 5 and pivot 7, length shortens half, is convenient for carry and carry, and through the fixed back of bolt 6 and slot 8, structural strength can not reduce.

Two sides of the upper ladder body and the lower ladder body are respectively provided with a positioning plate 16 and a positioning pin 17; one end of the positioning plate is rotatably connected to the upper ladder body; the positioning plate is provided with a row of clamping grooves 18 connected with the positioning pins; the clamping groove is a semicircular groove, a circle of concave ring is arranged on the inner side of the positioning pin, and the clamping groove is buckled on the concave ring.

After the clamping groove 18 of the positioning plate 16 is buckled with the positioning pin 17, the positioning plate can be used as a herringbone ladder, particularly, when the positioning plate is used indoors, the use function is richer, the clamping groove 18 of the positioning plate 16 is directly buckled with the positioning pin 17, and the positioning pin is provided with a circle of concave ring on the inner side and buckled on the concave ring from top to bottom, so that the positioning plate cannot be separated, and is safe and convenient.

The upper ladder body, the lower ladder body and the cross braces are made of magnesium alloy materials, and hollow cavities 13 are arranged in the middle; the upper ladder body and the lower ladder body are thickened at the joint with other parts.

The magnesium alloy is adopted, so that the weight is greatly reduced, and manual carrying and carrying are facilitated.

The connecting plate has the damping with pivot 7 that last ladder body and lower ladder body are connected, and the connecting plate can not rotate because of self gravity with last ladder body and lower ladder body to do not have other directions except rotating and rock.

The rotating shaft 7 is provided with damping, so that the upper ladder body and the lower ladder body are connected more compactly, and the ladder is prevented from shaking in operation like a whole, and the situation of sudden opening and the like during carrying is reduced.

The bottom of the slot 8 is provided with a groove 14 corresponding to the plug pin.

After the bolt 6 is inserted into the slot 8, the back of the bolt is attached to the groove 14 at the bottom of the slot 8, and the front of the bolt is blocked by the triangular block 15, so that the shaking of the bolt 6 in the slot 8 is reduced.

Example 2

The structure of this embodiment is basically the same as that of embodiment 1, and the difference is that the upper ladder body and the lower ladder body are disconnected from the middle, the connection mode of the disconnected parts is the same as that of the upper ladder body and the lower ladder body, the upper ladder body and the lower ladder body are divided into 4 groups and folded, and the ladder can be transported by adopting a common riding vehicle.

The folding ladder has a reasonable structure, and the upper ladder body and the lower ladder body can be folded, so that the folding ladder is convenient to transport and place; the upper ladder body and the lower ladder body can be folded into any common included angle and fixed, so that the ladder is convenient to use indoors; go up the ladder body, down the ladder body and the stull adopts magnesium alloy material, and the structure is more firm, the effectual technical problem who solves the insulating ladder of prior art and exist.

Example 3

The invention also relates to the improvement of the materials of the upper ladder body, the lower ladder body and the cross braces, wherein the upper ladder body, the lower ladder body and the cross braces are made of magnesium alloy materials, and specifically, the magnesium alloy materials are prepared according to the following process:

Example 4

The performance test of the magnesium alloy of the invention comprises the following steps:

setting a control group:

control group 1: AE44 magnesium alloy;

control group 2: the rest of the process is the same as example 3 without adding the magnesium-yttrium master alloy;

control group 3: the rest of the process is the same as that of example 3 without adding the magnesium-manganese master alloy;

control group 4: the same procedure as in example 3 was repeated except that no copper-magnesium master alloy was added.

Firstly, hardness detection: HR-150A detects the hardness of each sample; see table 1 specifically:

TABLE 1

Group of	Hardness value (HRC)
		Example 3	85.7
Control group 1	70.1
		Control group 2	79.8
Control group 3	66.3
		Control group 4	75.4

Secondly, tensile property: testing the tensile property of the WDW series microcomputer control electronic universal testing machine; see table 2 specifically:

TABLE 2

Group of	Tensile strength Mpa
		Example 3	149.3
Control group 1	121.5
		Control group 2	129.4
Control group 3	113.7
		Control group 4	130.9

And thirdly, testing the corrosion resistance:

according to the method of the uniform corrosion full immersion test in the GB10124-1988 metal material laboratory, the sample prepared in the example is obliquely and vertically placed in 3.5% NaCl solution, and after 4 days, the sample is taken out, the corrosion products on the surface of the sample are removed by CrO3+ AgNO 3+ Ba (NO3)2+ distilled water, and then the sample is cleaned by acetone and absolute ethyl alcohol to measure the corrosion rate (mm/a).

The corrosion rates of the alloys obtained in the above examples are shown in Table 3.

TABLE 3

Group of	Corrosion Rate (mm/a)
		Example 3	0.145
Control group 1	0.236
		Control group 2	0.208
Control group 3	0.169
		Control group 4	0.174

And (4) conclusion: as can be seen from tables 1-3, the magnesium alloy has improved properties, mechanical strength, hardness and corrosion resistance by adding the intermediate alloy of other elements.

It is to be understood that the above-described embodiments are only a few, and not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Claims

1. An electric insulating ladder comprises an upper ladder body (1) and a lower ladder body (9) which are respectively provided with a cross brace (4); the upper ladder body (1) is connected with the lower ladder body (1) through a connecting plate (5); the connecting plate (5) is arranged on the inner sides of the upper ladder body and the lower ladder body; the connecting plate (5) is respectively connected with the upper ladder body and the lower ladder body in a rotating way through a rotating shaft (7); a corresponding bolt (6) and a corresponding slot (8) are arranged between the upper ladder body and the lower ladder body; one side of the slot is provided with a slideway (10); a triangular block (15) in sliding connection is arranged in the slide way (10); the outer side surface of the triangular block is an inclined surface; the back of the triangular block is provided with a spring (11) which is elastically connected; the triangular block is provided with a handle (12); the outer surfaces of the upper ladder body, the lower ladder body and the cross braces are respectively brushed with anticorrosive insulating paint; the insulating sleeves (2) are sleeved outside the upper ladder body and the lower ladder body; an anti-slip sleeve (3) is sleeved outside the cross brace;

the upper ladder body (1), the lower ladder body (9) and the cross braces (4) are made of magnesium alloy materials;

when the folding ladder is used, the upper ladder body and the lower ladder body are rotated and bent through the connecting plate (5) and the rotating shaft (7), the bolt (6) is inserted from the side face of the slot (8), after the bolt (6) touches the triangular block, the triangular block slides towards the inner side of the slide way under the extrusion of the bolt (6) because the outer side face of the triangular block is an inclined face, the bolt (6) completely enters the slot (8) and then is separated from the triangular block, the triangular block returns under the elasticity of the spring 11, and the bolt (6) is surrounded and fixed on four sides; after the use, stir the handle on the triangle piece, the triangle piece removes to the slide in, buckles and goes up the ladder body and descend the ladder body, and bolt (6) break away from in slot (8).

2. An electrically insulating ladder as claimed in claim 1, further comprising: the magnesium alloy material is prepared according to the following process:

1) taking 100 parts of magnesium ingot, 20 parts of magnesium-manganese master alloy MgMn5, 10 parts of copper-magnesium master alloy CuMg10, 8 parts of magnesium-zirconium master alloy MgZr30 and 5 parts of magnesium-yttrium master alloy MgY30 in parts by weight;

2) taking a magnesium ingot, melting the magnesium ingot under the protection of argon gas, heating to 750 ℃ to obtain a Mg melt, then sequentially adding a magnesium-manganese intermediate alloy MgMn5, a copper-magnesium intermediate alloy CuMg10, a magnesium-zirconium intermediate alloy MgZr30 and a magnesium-yttrium intermediate alloy MgY30, and continuously refining for 30min under the protection of argon gas to obtain an alloy liquid;

3) pouring the alloy liquid into a mold, naturally cooling, and demolding to obtain an ingot; putting the cast ingot into a heating furnace, heating to 350 ℃, preserving heat for 60min, and then putting into water with the temperature of 50 ℃ for quenching; putting the quenched cast ingot into an aging furnace, heating to 180 ℃, preserving heat for 3 hours, and naturally cooling to room temperature after discharging; and then performing extrusion forming by a press machine to obtain the composite material.