CN214069524U - A transmission tower anticorrosion cross arm for I type insulator chain - Google Patents

Abstract

The utility model discloses an anticorrosive cross arm of transmission tower for I type insulator string, including the cross arm main part, cross arm main part level cross is on the iron tower body, and cross arm main part both ends set up the supporter respectively and are used for connecting the fixing base, the horizontal slope of supporter sets up, and the fixing base includes last staple bolt and lower staple bolt, lower staple bolt opening is upwards, and lower staple bolt opening part is equipped with the staple bolt ear, go up staple bolt opening downwards and match lower staple bolt setting, go up staple bolt opening part and be equipped with the staple bolt ear, go up staple bolt and lower staple bolt pass through the staple bolt ear and adopt bolted connection to form the staple bolt appearance chamber that matches with the supporter; the bottom end of the lower hoop is provided with a connecting piece, and the top end of the insulator string is connected with the fixed seat through the connecting piece. The inclined support body prevents rust liquid from flowing to the insulator string to affect the insulativity of the insulator string and generate galvanic corrosion, the anchor seat is formed in a hoop mode, the gap corrosion and the bolt deformation at the joint part caused by bolt connection are prevented, and the corrosion layer easily induces cross arm corrosion.

Description

A transmission tower anticorrosion cross arm for I type insulator chain

Technical Field

The utility model belongs to the technical field of electric power engineering, concretely relates to anticorrosive cross arm of steel pylons for I type insulator chain.

Background

An insulator string refers to a component in which two or more insulator elements are combined together to flexibly suspend a conductor, and an I-shaped insulator string, namely, a vertically suspended insulator string, is used for suspending the conductor and insulating the conductor from a tower and the ground. The number of insulators adopted by the I-shaped insulator string is small, and the load of the power transmission iron tower can be reduced.

The cross arm is used as an important component in the iron tower of the power transmission line, is used for installing an insulator string and hardware fittings, and is used for supporting the leads and keeping a certain safety distance between the leads. Currently, the fixing mode of the lead on the cross arm is generally to punch a hole on the cross arm, insert a steel foot of an insulator string into the hole of the cross arm for fixing, and fix the lead on the insulator string, so as to fix the lead on the cross arm.

But for the suspension I-shaped insulator string, rust liquid is hung at the end part of the cross arm, so that galvanic corrosion is aggravated, and the insulation performance of the insulator string is influenced; in addition, the mechanical property of the cross arm can be influenced by punching on the cross arm, the insulator string is connected with the cross arm through the bolt, the corrosion rate of a gap at the joint is high, the deformation of the bolt joint is caused, and the structural stability is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an anticorrosive cross arm of steel pylons for I type insulator chain, through improving the connection structure of current cross arm and insulator chain, avoid the rust liquid to hang and cause galvanic corrosion, simultaneously, it is high with insulator chain junction gap corrosion rate to solve the cross arm, arouses the problem of bolt deformation easily.

The utility model discloses a technical scheme be, an anticorrosive cross arm of steel pylons for I type insulator string, including insulator string, anticorrosive cross arm includes:

the cross arm main body is horizontally and transversely arranged on the iron tower body, two ends of the cross arm main body are respectively provided with a support body for connecting an insulator string, and the support bodies are horizontally arranged in an inclined manner;

the fixing seat comprises an upper hoop and a lower hoop, the opening of the lower hoop is upward, a hoop ear is arranged at the opening of the lower hoop, the opening of the upper hoop is downward and is matched with the lower hoop, the hoop ear is arranged at the opening of the upper hoop, and the upper hoop and the lower hoop are connected through the hoop ear by bolts to form a hoop containing cavity matched with the support body;

wherein, the bottom of the lower anchor ear is provided with a connecting piece, and the top of the insulator string is fixedly connected with the fixed seat through the connecting piece.

Furthermore, the supporting body horizontally inclines downwards towards the iron tower body, and the inclination angle is 5-15 degrees

Furthermore, the junction of supporter and cross arm main part is equipped with the edges and corners, and the tip level setting of cross arm main part is kept away from to the supporter for connect the fixing base, and supporter limit end evagination forms the blend stop.

Furthermore, the support body and the cross arm main body are integrally formed and are made of weather-resistant steel materials.

Furthermore, the inner walls of the upper anchor ear and the lower anchor ear are respectively provided with an upper rubber sleeve and a lower rubber sleeve, the axial width of the upper rubber sleeve is greater than that of the upper anchor ear, and two sides of the upper rubber sleeve are upwards provided with fastening spigot flanges.

Furthermore, the connecting piece is a hollow cylinder with an opening at the bottom end, threads are arranged in the connecting piece, and a screw rod is arranged at the top end of the insulator string and matched with the connecting piece and is in threaded connection with the connecting piece through the screw rod.

Furthermore, the outer wall surface of the connecting piece is circumferentially provided with a baffle plate, the baffle plate inclines downwards, and the diameter of the baffle plate is larger than that of the insulator string.

The utility model discloses the beneficial effect who compares prior art is:

1) the supporting bodies are obliquely arranged at two ends of the cross arm main body, under the condition that stress between the cross arm main body and an iron tower body is ensured, rainwater or rust liquid can flow to the cross arm main body through the oblique supporting bodies, the rust liquid is prevented from flowing to an insulator string, the insulativity of the insulator string is influenced, and galvanic corrosion is generated;

2) in the design, the supporting body horizontally inclines downwards by 5-15 degrees towards the iron tower body, the structure is favorable for enhancing the stress of the iron tower, the counter force with natural wind is kept to enhance the balance stability of the whole structure, and the inclination angle ensures that rainwater or rust liquid flows and avoids water accumulation;

3) the connecting part of the supporting body and the cross arm main body is provided with the edge angle, so that rainwater or rust liquid can drip from the edge angle, the phenomenon that the rainwater or the rust liquid stays on the cross arm for a long time to corrode a cross arm protective layer is avoided, the other end of the supporting body is horizontally provided with a fixing seat which is convenient to connect, the horizontal part is just connected with the fixing seat, the rainwater or the rust liquid cannot be influenced to flow and hang, and the edge end of the supporting body protrudes outwards to form a blocking strip to prevent the fixing seat from slipping;

4) the cross arm main body and the supporting body are integrally formed, the structure is simple, the forming is convenient and quick, the number of connecting nodes is reduced, the structural strength is enhanced, the number of corrosion nodes is reduced, the corrosion resistance of the cross arm main body is enhanced by adopting weather-resistant steel materials, and meanwhile, the connecting corrosion caused by the connection of dissimilar metals and the iron tower body is prevented;

5) the upper rubber sleeve and the lower rubber sleeve are arranged on the inner walls of the upper anchor ear and the lower anchor ear, so that the fixed seat is in insulated connection with the support body, and the support body is protected from abrasion;

6) the connecting piece is in threaded connection with the insulator string, so that the connecting piece is convenient to disassemble, overhaul or replace, and the durability of power transmission is ensured;

7) the baffle is arranged on the outer wall surface of the connecting piece in the circumferential direction, the baffle inclines downwards to be favorable for rainwater to drip, the insulator string below is protected, and the service life of the insulator string is prolonged.

Drawings

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

fig. 2 is a schematic view of the fixing member of the present invention.

The labels in the figure are: 1. the cross arm comprises a cross arm main body, 2, a supporting body, 21, a barrier strip, 3, a fixing seat, 31, an upper hoop, 311, an upper rubber sleeve, 312, a fastening seam allowance flanging, 32, a lower hoop, 321, a lower rubber sleeve, 33, hoop ears, 34, a connecting piece, 341 and a baffle.

Detailed Description

The invention will be further explained with reference to the drawings attached to the specification in order to facilitate better understanding by those skilled in the art.

Referring to fig. 1-2, an anticorrosion cross arm for a power transmission iron tower of an I-type insulator string, the anticorrosion cross arm being used in cooperation with an iron tower body, includes a cross arm main body 1 and a fixing seat 3, wherein the fixing seat 2 is used for connecting an insulator string 4.

Iron tower body is transversely arranged in to cross arm main part 1 level, and 1 both ends of cross arm main part set up supporter 2 respectively and are used for connecting insulator chain 4, the setting of 2 horizontal slopes of supporter is guaranteeing that overall structure is stable sets up the supporter 2 of slope simultaneously, is favorable to rainwater or rust liquid to trickling to the low, avoids rust liquid to flow to insulator chain 4. Specifically, the supporting body 2 horizontally inclines downwards towards the iron tower body, the inclination angle is 5-15 degrees, the structure of the supporting body is beneficial to keeping the counter force with natural wind so as to enhance the balance stability of the whole structure, and rainwater or rust liquid is guaranteed to flow smoothly.

The applicant finds that dissimilar metal connection exists in connection of the weather-resistant steel power transmission iron tower, friction between the weather-resistant steel power transmission iron tower and the galvanized steel is frequent due to external wind load, a galvanized metal layer is damaged, connection corrosion is easy to occur at a joint of dissimilar metals, and therefore in the embodiment, the supporting body 2 and the cross arm main body 1 are made of the weather-resistant steel material, and connection corrosion of the cross arm main body 1 and the supporting body 2 and connection corrosion of the cross arm main body 1 and the iron tower body due to the dissimilar metal connection are prevented.

Furthermore, the support body 2 and the cross arm main body 1 are integrally formed, so that the structure is simple, the forming is convenient and quick, the connecting nodes are reduced to increase the structural strength, and the corrosion nodes are reduced; edges and corners are arranged at the connecting positions of the support body 2 and the cross arm main body 1, so that rainwater or rust liquid can drip from the edges and corners, and water accumulation is avoided; the tip level that cross arm main part 1 was kept away from to supporter 2 sets up, horizontal tip just is used for connecting fixing base 3, and is unlikely to cause the rust liquid to hang to 2 limit end evaginations of supporter form blend stop 21, prevent fixing base 3 slippage.

In this embodiment, fixing base 3 includes staple bolt 31 and staple bolt 32 down, staple bolt 32 opening makes progress down to staple bolt 32 opening part is equipped with staple bolt ear 33 down, sets up the mounting hole on the staple bolt ear 32, go up staple bolt 31 opening and downward and match staple bolt 32 setting down, go up staple bolt 31 opening part and be equipped with staple bolt ear 33, correspond staple bolt 32 down on the staple bolt ear 33 and be equipped with the mounting hole, go up staple bolt 31 and adopt bolted connection to form the staple bolt appearance chamber that matches with supporter 2 with lower staple bolt 32 through staple bolt ear 33. Wherein, the bottom of lower staple bolt 32 is equipped with connecting piece 34, and insulator chain 3 top is through connecting piece 34 and fixing base 3 fixed connection. The fixing piece 3 formed by the upper hoop 31 and the lower hoop 32 is used for connecting the supporting body 2, so that the phenomenon that the joint caused by connecting the insulator string and the cross arm by bolts after holes are formed in the supporting body 2 is subjected to gap corrosion is avoided, the cross arm is further induced to be corroded, and in addition, the mechanical property of the cross arm is effectively ensured.

Further, the inner walls of the upper anchor ear 31 and the lower anchor ear 32 are respectively provided with an upper rubber sleeve 311 and a lower rubber sleeve 321, so that the fixed seat 3 is in insulated connection with the support body 2, the connection stability is enhanced through the upper rubber sleeve 311 and the lower rubber sleeve 321, and the surface of the support body 2 is prevented from being corroded due to abrasion; and the axial width of the upper rubber sleeve 311 is greater than the axial width of the upper hoop 31, and fastening seam allowance flanges 312 are arranged on two sides of the upper rubber sleeve 311 upwards, so that the upper hoop 31 can be conveniently clamped in the upper rubber sleeve 311, and the upper hoop 31 can be prevented from slipping off.

In the embodiment, the connecting piece 34 is a hollow cylinder with an opening at the bottom end, the connecting piece 34 is internally provided with threads, the top end of the insulator string 4 is matched with the connecting piece 34 and provided with a screw rod, and the screw rod is in threaded connection with the connecting piece 34, so that the disassembly, the overhaul and the replacement are convenient; the baffle 341 is arranged on the outer wall surface of the connecting piece 34 in the circumferential direction, the baffle 341 inclines downwards, the diameter of the baffle 341 is larger than that of the insulator string 4, rainwater directly drips through the baffle 341, and the insulator string 4 below is protected by the baffle 341.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the design concept, several changes and modifications can be made, which are within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (7)

1. An anti-corrosion cross arm for a power transmission tower of an I-shaped insulator string, which comprises an insulator string (4), and is characterized by comprising:

the cross arm comprises a cross arm main body (1), wherein the cross arm main body (1) is horizontally and transversely arranged on an iron tower body, two ends of the cross arm main body (1) are respectively provided with a support body (2) for connecting an insulator string (4), and the support bodies (2) are horizontally and obliquely arranged;

the fixing seat (3) comprises an upper hoop (31) and a lower hoop (32), the lower hoop (32) is upward in opening, a hoop ear (33) is arranged at the opening of the lower hoop (32), the upper hoop (31) is downward in opening and matched with the lower hoop (32), the hoop ear (33) is arranged at the opening of the upper hoop (31), and the upper hoop (31) and the lower hoop (32) are connected through the hoop ear (33) by bolts to form a hoop containing cavity matched with the support body (2);

wherein, the bottom of the lower anchor ear (32) is provided with a connecting piece (34), and the top of the insulator string (4) is fixedly connected with the fixed seat (3) through the connecting piece (34).

2. The anti-corrosion cross arm for the power transmission tower of the I-shaped insulator string as claimed in claim 1, wherein: the supporting body (2) horizontally inclines downwards towards the iron tower body, and the inclination angle is 5-15 degrees.

3. The anti-corrosion cross arm for the power transmission tower of the I-shaped insulator string as claimed in claim 1, wherein: the junction of supporter (2) and cross arm main part (1) is equipped with the edges and corners, and the tip level setting of supporter (2) keeping away from cross arm main part (1) for connect fixing base (3) to supporter (2) limit end evagination forms blend stop (21).

4. The anti-corrosion cross arm for the power transmission tower of the I-shaped insulator string as claimed in claim 1, wherein: the supporting body (2) and the cross arm main body (1) are integrally formed and are made of weather-resistant steel materials.

5. The anti-corrosion cross arm for the power transmission tower of the I-shaped insulator string as claimed in claim 1, wherein: go up staple bolt (31) and lower staple bolt (32) inner wall and be equipped with gum cover (311) and gum cover (321) down respectively to go up gum cover (311) axial width and be greater than the axial width of last staple bolt (31), go up gum cover (311) both sides and upwards be equipped with fastening tang turn-ups (312).

6. The anti-corrosion cross arm for the power transmission tower of the I-shaped insulator string as claimed in claim 1, wherein: the connecting piece (34) is a hollow cylinder with an opening at the bottom end, threads are arranged in the connecting piece (34), and a screw rod is arranged at the top end of the insulator string (4) and matched with the connecting piece (34) and is in threaded connection with the connecting piece (34) through the screw rod.

7. The anti-corrosion cross arm for the power transmission towers of the I-type insulator strings, according to claim 6, is characterized in that: the outer wall surface of the connecting piece (34) is circumferentially provided with a baffle (341), the baffle (341) inclines downwards, and the diameter of the baffle is larger than that of the insulator string (4).

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