CN212866628U

CN212866628U - Steel bar connecting device of concrete structure of transformer substation

Info

Publication number: CN212866628U
Application number: CN202021462165.8U
Authority: CN
Inventors: 俞铁勇; 俞培海; 赵程磊; 夏兰强; 王刚
Original assignee: Zhoushan Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Current assignee: Zhoushan Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2021-04-02
Anticipated expiration: 2030-07-22

Abstract

The utility model discloses a reinforcing bar connecting device of a concrete structure of a substation, which comprises an upper reinforcing bar section and a lower reinforcing bar section, the reinforcing bar connecting device further comprises a steel sleeve and an insulating joint located in the steel sleeve. The openings are respectively provided with an upper cover and a lower cover, the upper steel bar section extends into the steel sleeve through the center hole of the upper cover and is inserted into the upper opening of the insulating joint, and the lower steel bar section extends into the steel sleeve through the center hole of the lower cover and is connected with the The lower port of the insulating joint is inserted; the lower cover is penetrated with a grouting hole, and the upper cover is penetrated with an air outlet; the inner wall of the steel sleeve is provided with an insulating layer, the upper steel bar section extends into the part of the steel sleeve, and the lower steel bar section extends into the steel sleeve Cement grout is poured between the part of the barrel and the insulating joint and the insulating layer of the inner wall of the steel sleeve. The device can interrupt the stray current loop, thereby avoiding stray current corrosion, and can meet the strength and firmness of the steel bar connection.

Description

Steel bar connecting device of concrete structure of transformer substation

Technical Field

The utility model relates to a construction field of transformer substation's building or structure specifically says a concrete structure's of transformer substation steel bar connection device.

Background

The concrete structure of the transformer substation refers to components such as reinforced concrete walls, beams, columns, plates and the like in the transformer substation, such as reinforced concrete columns for supporting high-voltage cables.

In a power transmission system of a transformer substation, a power transmission conductor, a steel bar in a concrete structure and the ground form a current loop, and partial current leaks to the ground through the steel bar in the concrete structure, so that stray current flowing outside the designed or specified loop is formed. As a carrier of stray currents, there is a possibility that the steel reinforcement of the concrete structure of the substation is corroded by the stray currents. Therefore, there is a need in the industry to design some structure to break the loop.

Because the length of a single steel bar is limited, two steel bars in the concrete structure need to be connected with each other to meet the requirements of the length and the mechanical property of the member. The connection mode in the prior art is welding, binding or screwing an upper reinforcing steel bar and a lower reinforcing steel bar by utilizing an internal thread sleeve; the above-described connection means obviously cannot achieve insulation.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a can break stray current's return circuit to avoid stray current to corrode, and can satisfy the intensity of plugging into the reinforcing bar and the concrete structure's of transformer substation reinforcing bar connecting device of firmness.

The technical solution of the utility model is that, a steel bar connecting device of the concrete structure of the transformer substation is provided, which comprises an upper steel bar section and a lower steel bar section, the steel bar connecting device also comprises a steel sleeve and an insulating joint positioned in the steel sleeve, the upper opening and the lower opening of the steel sleeve are respectively provided with an upper cover and a lower cover, the upper steel bar section extends into the steel sleeve through the center hole of the upper cover and is spliced with the upper opening of the insulating joint, the lower steel bar section extends into the steel sleeve through the center hole of the lower cover and is spliced with the lower opening of the insulating joint; a grouting hole is formed through the lower cover, and an air outlet hole is formed through the upper cover; the inner wall of the steel sleeve is provided with an insulating layer, and cement slurry is poured between the part of the upper steel bar section extending into the steel sleeve, the part of the lower steel bar section extending into the steel sleeve and the insulating layer between the insulating joint and the inner wall of the steel sleeve.

Compared with the prior art, the steel bar connecting device of the concrete structure of the transformer substation with the structure has the following advantages:

the assembling process of the connecting device comprises the steps of enabling the upper steel bar section to penetrate through the upper cover and be inserted into the upper opening of the insulating joint, inserting the lower end of the upper steel bar section and the insulating joint into the steel sleeve, enabling the lower steel bar section to penetrate through the lower cover and extend into the steel sleeve, inserting the upper end of the lower steel bar section into the lower opening of the insulating joint, pressing the upper cover and the lower cover with the steel sleeve, and then pouring cement paste into the steel sleeve from the grouting hole until the grout emerges from the air outlet hole. Of course, the upper reinforcement section and the upper main reinforcement are connected by a conventional connection method such as welding, binding and the like, and the lower reinforcement section and the lower main reinforcement are connected by the same connection method.

As can be seen from the above analysis, firstly, the above structure is convenient to manufacture and assemble and has strong operability; the connecting structure substantially forms a grout anchor steel sleeve structure, has ideal connecting effect and firm connection, and can meet the mechanical property requirement of the load of the steel bar; more importantly, the insulation joint is arranged between the upper steel bar section and the lower steel bar section, a main path for stray current to flow to the ground is broken, and the insulation layer on the inner wall of the steel sleeve cylinder breaks a flow path for the current to flow from the upper steel bar section, cement paste and the steel sleeve to the lower steel bar section, so that the stray current is prevented from leaking to the ground through the steel bars of the concrete structure, and the steel bars of the reinforced concrete structure of the transformer substation are prevented from being corroded.

Preferably, the inner wall of the steel sleeve is provided with a plurality of horizontal limiting rings which are inwards convex in the radial direction; therefore, the anchoring effect of the steel sleeve and the upper and lower steel bar sections is enhanced, and the mechanical properties of the joint, such as strength, bearing capacity and the like, are improved.

Preferably, the steel sleeve is sleeved with an upper rubber sleeve and a lower rubber sleeve, the upper steel bar section penetrates through a central hole of the upper rubber sleeve end plate, and the lower steel bar section penetrates through a central hole of the lower rubber sleeve end plate; the lower opening of the upper rubber sleeve is provided with at least two L-shaped elastic sheets, the lower ends of the L-shaped elastic sheets are provided with outward-warped arc-shaped bulges, the upper opening of the lower rubber sleeve is provided with U-shaped buckles corresponding to the L-shaped elastic sheets one by one, each L-shaped elastic sheet passes through the U-shaped buckle in a hard extrusion manner, and the arc-shaped bulges of the L-shaped elastic sheets are hooked with the lower edges of the corresponding U-shaped buckles; therefore, a layer of complete waterproof partition structure is arranged outside the steel sleeve, so that a new current path of an upper reinforcing steel bar section, damp cement paste and a lower reinforcing steel bar section is prevented from being formed due to the fact that external moisture is immersed into the cement paste of the steel casing, and the waterproof and insulating performance of the connecting structure is further improved; moreover, the structure is fast and convenient to assemble, and only the upper rubber sleeve and the lower rubber sleeve need to be buckled, so that the L-shaped elastic sheet is clamped into the corresponding U-shaped buckle.

Drawings

Fig. 1 is a schematic structural view of the steel bar connecting device of the concrete structure of the transformer substation.

Fig. 2 is the utility model discloses half sectional structure schematic diagram of concrete structure's of transformer substation steel bar connection device.

Fig. 3 is the explosion structure diagram of the steel bar connecting device of the concrete structure of the transformer substation.

The steel bar section comprises an upper steel bar section 1, an upper steel bar section 2, a lower steel bar section 3, a steel sleeve 4, an insulating joint 5, an upper cover 6, a lower cover 7, a grouting hole 8, an air outlet hole 9, an insulating layer 10, a horizontal limiting ring 11, an upper rubber sleeve 12, a lower rubber sleeve 13, an L-shaped elastic sheet 14, an arc-shaped bulge 15 and a U-shaped buckle.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

As shown in fig. 1-3, the utility model discloses concrete structure's of transformer substation steel bar connection device, it includes reinforcement section 1 and lower reinforcement section 2, foretell reinforcement section 1 and lower reinforcement section 2 of going up rely on conventional mode of plugging into respectively like welding, ligature etc. and the main reinforcing bar that is located the top and the main reinforcing bar connection that is located the below.

The steel bar connecting device also comprises a steel sleeve 3 and an insulating joint 4 which is positioned in the steel sleeve 3 and is made of plastic or rubber materials, an upper cover 5 made of hard plastic materials is arranged at the upper opening of the steel sleeve 3, a lower cover 6 made of hard plastic materials is arranged at the lower opening of the steel sleeve 3, an upper steel bar section 1 extends into the steel sleeve 3 through a center hole of the upper cover 5 and is spliced with an upper opening of the insulating joint 4, and a lower steel bar section 2 extends into the steel sleeve 3 through a center hole of the lower cover 6 and is spliced with a lower opening of the insulating joint 4. The lower cover 6 is provided with a grouting hole 7 in a penetrating way, and the upper cover 5 is provided with an air outlet hole 8 for exhausting air during grouting in a penetrating way. The inner wall of the steel sleeve 3 is provided with a plurality of horizontal limiting rings 10 which are used for enhancing the anchoring strength and are inwards convex in the radial direction. The inner wall of the steel sleeve 3 and the inner surface of the horizontal limiting ring 10 are both coated with an insulating layer 9 made of PVC material, in other words, the shape of the insulating layer 9 is matched with the shapes of the steel sleeve 3 and the horizontal limiting ring 10, and the steel sleeve can be manufactured by adopting a secondary injection molding mode. Grout is poured between the part of the upper steel bar section 1 extending into the steel sleeve 3, the part of the lower steel bar section 2 extending into the steel sleeve 3 and the insulating layer 9 between the insulating joint 4 and the inner wall of the steel sleeve 3. Of course, the inner diameter of the horizontal stop collar 10 is significantly larger than the outer diameter of the insulated joints 4.

An upper rubber sleeve 11 and a lower rubber sleeve 12 are sleeved outside the steel sleeve 3, an upper steel bar section 1 penetrates through a central hole of an end plate of the upper rubber sleeve 11, and a lower steel bar section 2 penetrates through a central hole of an end plate of the lower rubber sleeve 12; go up rubber sleeve 11 under shed department and be equipped with two at least L shape shell fragments 13, the lower extreme of L shape shell fragment 13 is equipped with the arc arch 14 of upwarping outward, and lower rubber sleeve 12 upper shed is equipped with and detains 15 with the U-shaped of L shape shell fragment 13 one-to-one, and L shape shell fragment 13 in this embodiment is detained 15 with the U-shaped and is four, along circumference evenly distributed. Each L-shaped elastic sheet 13 is firmly extruded to pass through the U-shaped buckle 15, and the arc-shaped bulge 14 of the L-shaped elastic sheet 13 is hooked with the lower edge of the corresponding U-shaped buckle 15. Of course, the steel casing 3 may not be covered by the upper rubber sleeve 11 and the lower rubber sleeve 12, but may be directly coated with an insulating waterproof epoxy coating.

Claims

1. the reinforcing bar connecting device of the concrete structure of a substation, it comprises the upper reinforcing bar section (1) and the lower reinforcing bar section (2), it is characterized in that: this reinforcing bar connecting device also comprises a steel sleeve (3) and is located in the steel sleeve The insulating joint (4) in the cylinder (3), the upper and lower openings of the steel sleeve (3) are respectively provided with an upper cover (5) and a lower cover (6), and the upper steel bar section (1) passes through the center of the upper cover (5). The hole extends into the steel sleeve (3) and is inserted into the upper opening of the insulating joint (4). 4) The lower port is plugged; the lower cover (6) is provided with a grouting hole (7), and the upper cover (5) is provided with an air outlet (8); the inner wall of the steel sleeve (3) is provided with an insulating layer (9), The part of the upper reinforcing bar section (1) extending into the steel sleeve (3), the part of the lower reinforcing bar section (2) extending into the steel sleeve (3) and the insulating layer between the insulating joint (4) and the inner wall of the steel sleeve (3) (9) Cement slurry is poured between them.

2 . The reinforcing bar connecting device of the concrete structure of the substation according to claim 1 , wherein the inner wall of the steel sleeve ( 3 ) is provided with a plurality of horizontal limit rings ( 10 ) radially inwardly convex. 3 .

3. The steel bar connecting device of the concrete structure of the substation according to claim 1, is characterized in that: the steel sleeve (3) is covered with an upper rubber sleeve (11) and a lower rubber sleeve (12), and the upper steel bar section (1 ) passes through the center hole of the end plate of the upper rubber sleeve (11), and the lower reinforcing bar section (2) passes through the center hole of the end plate of the lower rubber sleeve (12); at least two Ls are provided at the lower opening of the upper rubber sleeve (11). The lower end of the L-shaped shrapnel (13) is provided with an arc-shaped protrusion (14) that is turned outward, and the upper opening of the lower rubber sleeve (12) is provided with a U-shaped shrapnel corresponding to the L-shaped shrapnel (13) one-to-one. Buckle (15), each L-shaped elastic piece (13) is hard pressed through the U-shaped buckle (15), and the arc-shaped protrusion (14) of the L-shaped elastic piece (13) and the corresponding lower edge of the U-shaped buckle (15) hook.