CN207368624U - A kind of transposition tower - Google Patents

Abstract

The utility model discloses a kind of transposition tower, belongs to transmission line of electricity field.The transposition tower includes：Tower body, left horizontal stretcher, right horizontal stretcher, left earth wire support, right earth wire support, wire jumper part.Wherein, left horizontal stretcher and right horizontal stretcher are symmetrical arranged, and connecting pin at the top of tower body respectively with being connected, and free end is both provided with preceding hanging point and rear hanging point, and preceding hanging point and rear hanging point are respectively used to be hung with front insulator string and rear insulator chain.Left earth wire support and right earth wire support are symmetrical arranged, and roof of the lower end respectively with left horizontal stretcher and right horizontal stretcher connecting pin is connected.Wire jumper part is arranged between left earth wire support and right earth wire support, for being electrically connected with the first wire jumper and the second wire jumper.Front and rear sides at the top of tower body is separately provided for preceding hanging point and the rear hanging point of suspension front insulator string and rear insulator chain.The transposition tower is with simple in structure, tower heavy and light, manufacture cost is low, easily and safely replaces to three-phase conducting wire, and suitable for the transposition of single loop transmission line of electricity.

Description

a transposition tower

technical field

The utility model relates to the field of power transmission lines, in particular to a transposition tower.

Background technique

During the power transmission process of the transmission line, the three-phase conductors generate capacitance to the ground respectively, and with the extension of the transmission line, the capacitive reactance values of the three-phase conductors are not equal, which will cause the obtained transmission parameters of the three-phase conductors to be unequal, and even cause Zero sequence current and negative sequence current. Zero-sequence current and negative-sequence current are likely to cause line and motor failures and affect normal power transmission. Therefore, it is necessary to ensure that the capacitive reactance values of the three-phase wires are equal. The transposition of the three-phase wires through the transposition tower can ensure that the capacitive reactance values of the three-phase wires are equal, so it is very necessary to provide a transposition tower.

The prior art provides a transposition tower, which includes: a tower body, a tower head, a ground wire bracket, a left transposition jumper bracket, a right transposition jumper bracket, a left cross arm, a right cross arm, a middle Cross arm (middle transposition jumper bracket). Wherein, the lower end of the tower head is connected with the upper end of the tower body, the ground wire bracket is horizontally fixed on the upper end of the tower head, and the left and right transposition jumper wire brackets are respectively fixed on the left and right sides of the ground wire bracket. The left cross arm and the right cross arm are arranged symmetrically, and the connecting ends are respectively connected to the top of the tower body, and the free ends are provided with front and rear hanging points for hanging the front insulator string and the rear insulator string. The front and rear sides of the middle part of the tower head are respectively provided with front and rear hanging points for hanging the front insulator string and the rear insulator string. One end of the middle cross arm is connected with the front side of the upper end of the tower body. Connect the front left-phase conductor and rear left-phase conductor to the front insulator string and rear insulator string at the free end of the left cross-arm respectively; connect the front right-phase conductor and rear right-phase conductor to the front insulator string at the free end of the right cross-arm respectively , Rear insulator series connection; connect the front middle phase conductor and the rear middle phase conductor to the front insulator series and the rear insulator series on the front and rear sides of the tower head respectively. Use the first jumper to electrically connect with the front left phase wire, and bypass the middle cross arm to electrically connect with the rear right phase wire. Use the second jumper to be electrically connected to the front middle phase wire, and bypass the left transposition jumper bracket to be electrically connected to the rear left phase wire. Use the third jumper to be electrically connected to the front right phase wire, and bypass the right transposition jumper bracket to be electrically connected to the rear middle phase wire. The transposition of the three-phase conductors is realized through the above connection methods.

The designer finds that the prior art has at least the following problems:

The transposition tower provided by the prior art is equipped with a left transposition jumper bracket, a right transposition jumper frame, and a middle transposition jumper frame, which complicates the structure of the transposition tower and increases tower weight and manufacturing cost. Moreover, when transposing, the jumper needs to bypass the jumper bracket, which is inconvenient for the maintenance of the transposition tower.

Utility model content

In order to solve the problems of the prior art, the embodiment of the utility model provides a transposition tower with simple structure, light tower weight, low manufacturing cost and convenient maintenance. Described technical scheme is as follows:

The embodiment of the utility model provides a transposition tower, including: a tower body, a left cross arm, and a right cross arm;

The left cross-arm and the right cross-arm are arranged symmetrically, the connecting ends are respectively connected to the top of the tower body, and the free ends are provided with a front hanging point and a rear hanging point, and the front hanging point and the rear hanging point are respectively Used to hang front insulator strings and rear insulator strings;

The transposition tower also includes: a left ground wire bracket, a right ground wire bracket, and a jumper;

The left ground wire support and the right ground wire support are arranged symmetrically, and the lower ends are respectively connected to the top walls of the connecting ends of the left cross arm and the right cross arm;

The jumper is arranged between the left ground wire bracket and the right ground wire bracket, and is used for electrical connection with the first jumper wire and the second jumper wire;

Front and rear hanging points for hanging the front insulator string and the rear insulator string are respectively arranged on the front and rear sides of the top of the tower body.

Specifically, preferably, the distance between the left ground wire support and the right ground wire support decreases gradually from top to bottom.

Specifically, as a preference, a first left hanging point and a first right hanging point are provided on the outer sides of the free ends of the left ground wire support and the right ground wire support, respectively, for connecting the left ground wire and the right ground wire respectively.

Specifically, preferably, a second left hanging point and a second right hanging point are arranged on the inside of the left ground wire bracket and the right ground wire bracket;

The left and right ends of the jumper are respectively hung on the second left hanging point and the second right hanging point.

Specifically, preferably, the jumper includes: a left insulator string, an electrical connector, and a right insulator string connected in sequence;

The left end of the left insulator string is suspended on the second left hanging point;

The right end of the right insulator string is suspended on the second right hanging point;

The electrical connector is used for electrical connection with the first jumper and the second jumper.

Specifically, preferably, the electrical connector is a wire.

Specifically, preferably, the electrical connection member is electrically connected to the first jumper and the second jumper in a T-shaped manner.

Specifically, preferably, both the front insulator string and the rear insulator string are tension insulator strings.

Specifically, as a preference, the free ends of the left cross arm and the right cross arm are provided with lower hanging points for hanging the lower insulator string.

Specifically, preferably, the lower insulator string is a hanging insulator string.

The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

In the transposition tower provided by the embodiment of the utility model, by setting a jumper between the left ground wire support and the right ground wire support, it is avoided to set a plurality of jumper wire supports to realize the transposition of the three-phase wires, and the transposition tower is simplified. The structure reduces the weight of the tower, reduces the manufacturing cost, is convenient for later operation and maintenance, and fully meets the requirements of the electrical clearance of the first jumper, the second jumper, the third jumper, and the fourth jumper when transposition. By setting the front hanging point and the rear hanging point in pairs at the free ends of the left cross arm, the right cross arm, and the top of the tower body, it is convenient to hang the front insulator string and the rear insulator string, and then it is convenient for them to connect with the front left phase wire respectively. , The rear left phase wire, the front right phase wire, the rear right phase wire, the front middle phase wire, and the rear middle phase wire are connected to facilitate transposition of the three-phase wires in the later stage. By setting the left ground wire support and the right ground wire support, it is convenient to connect with the ground wire, so as to play the role of lightning protection. It can be seen that the transposition tower has the advantages of simple structure, light tower weight, low manufacturing cost, convenient and safe transposition of three-phase conductors, and is suitable for transposition of single-circuit transmission lines.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural diagram of a transposition tower provided by an embodiment of the present invention.

Wherein, the reference signs represent respectively:

1 tower body,

2 left cross arm,

3 right cross arm,

4 Left ground bracket,

5 Right ground bracket,

6 jumper pieces,

601 left insulator string,

602 Electrical connectors,

603 right insulator string,

7a front insulator string,

7b rear insulator string,

8 lower insulator strings,

9 first jumper,

10 Second jumper,

11 Third jumper,

12 Fourth jumper,

13a Front left phase conductor,

13b Rear left phase wire,

14a Front right phase conductor,

14b rear right phase conductor,

15a Front middle phase wire,

15b Rear middle phase wire.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

The embodiment of the utility model provides a transposition tower, as shown in Figure 1, the transposition tower includes: tower body 1, left cross arm 2, right cross arm 3, left ground wire support 4, right ground wire support 5. Jumper 6. Among them, the left cross-arm 2 and the right cross-arm 3 are arranged symmetrically, the connecting ends are respectively connected to the top of the tower body 1, and the free ends are provided with front and rear hanging points, which are respectively used for hanging the front insulator string 7a and rear insulator string 7b. The left ground wire support 4 and the right ground wire support 5 are arranged symmetrically, and the lower ends are respectively connected with the top walls of the connection ends of the left cross arm 2 and the right cross arm 3 . The jumper 6 is disposed between the left ground wire support 4 and the right ground wire support 5 for electrical connection with the first jumper 9 and the second jumper 10 . The front and rear sides of the top of the tower body 1 are respectively provided with front hanging points and rear hanging points for hanging the front insulator string 7a and the rear insulator string 7b.

In the embodiment of the utility model, for the convenience of description, when the operator faces the transposition tower, the front of the transposition tower is referred to as "front", the back of the transposition tower is "rear", the left side of the transposition tower and the The right sides are "left" and "right", respectively, and the current is sent from the front to the rear.

The working principle of the transposition tower provided by the embodiment of the present invention is described below:

Connect the front left phase conductor 13a and the rear left phase conductor 13b to the front insulator string 7a and the rear insulator string 7b at the free end of the left cross arm 2 respectively. Connect the front right phase conductor 14a and the rear right phase conductor 14b to the front insulator string 7a and the rear insulator string 7b at the free end of the right cross arm 3 respectively. Connect the front middle phase conductor 15a and the rear middle phase conductor 15b to the front insulator string 7a and the rear insulator string 7b suspended on the front and rear sides of the top of the tower body 1 respectively. Use the first jumper 9 to electrically connect the front left phase conductor 13a and the jumper 6, use the second jumper 10 to electrically connect the jumper 6 and the rear right phase conductor 14b, so that the current in the front left phase conductor 13a Transpose to rear right phase conductor 14b. The third jumper wire 11 is used to electrically connect the front middle phase conductor 15a and the rear left phase conductor 13b, so that the current in the front middle phase conductor 15a is transposed to the rear left phase conductor 13b. The fourth jumper 12 is used to electrically connect the front right phase conductor 14a and the rear middle phase conductor 15b, so that the current in the front right phase conductor 14a is transposed to the rear middle phase conductor 15b.

It should be noted that the third jumper 11 and the fourth jumper 12 are respectively located on the left and right sides of the transposition tower, and the first jumper 9 and the second jumper 10 are electrically connected to the jumper 6, which is convenient to use The first jumper 9 , the second jumper 10 , the third jumper 11 , and the fourth jumper 12 fully meet the requirements of the electrical clearance.

In the transposition tower provided by the embodiment of the utility model, by setting the jumper 6 between the left ground wire support 4 and the right ground wire support 5, it is avoided to set a plurality of jumper wire supports to realize the transposition of the three-phase wires, which simplifies The structure of the transposition tower reduces the weight of the tower, reduces the manufacturing cost, is convenient for later operation and maintenance, and fully meets the requirements of the first jumper 9, the second jumper 10, the third jumper 11, and the fourth jumper 12 during transposition. electrical clearance requirements. By setting the front hanging point and the rear hanging point in pairs respectively at the free ends of the left cross arm 2, the right cross arm 3, and the top of the tower body 1, it is convenient to hang the front insulator string 7a and the rear insulator string 7b, and then facilitate their respective It is connected with the front left phase conductor 13a, the rear left phase conductor 13b, the front right phase conductor 14a, the rear right phase conductor 14b, the front middle phase conductor 15a, and the rear middle phase conductor 15b, so as to transpose the three phase conductors later. By setting the left ground wire support 4 and the right ground wire support 5, it is convenient to connect with the ground wire to play the role of lightning protection. It can be seen that the transposition tower has the advantages of simple structure, light tower weight, low manufacturing cost, convenient and safe transposition of three-phase conductors, and is suitable for transposition of single-circuit transmission lines.

Specifically, as shown in FIG. 1 , the distance between the left ground wire support 4 and the right ground wire support 5 decreases gradually from top to bottom.

So set, under the premise of reducing the overall tower height, a longer jumper 6 can be set, so that there is a larger gap between the first jumper 9 and the second jumper 10 electrically connected to the jumper 6. The spacing, and then meet the electrical clearance, to ensure normal transposition.

The free ends of the left ground wire support 4 and the right ground wire support 5 are respectively provided with a first left hanging point and a first right hanging point, which are respectively used for connecting the left ground wire and the right ground wire.

Set the first left hanging point and the first right hanging point to facilitate the connection of the left ground wire and the right ground wire respectively, so as to effectively prevent lightning.

In order to ensure that the electrical clearance between the first jumper 9 and the second jumper 10 meets the requirements after the jumper 6 is electrically connected to the first jumper 9 and the second jumper 10, the jumper 6 is arranged on the left side along the horizontal direction. Between the ground wire support 4 and the right ground wire support 5. Specifically, the inner sides of the left ground wire support 4 and the right ground wire support 5 are relatively provided with a second left hanging point and a second right hanging point; the left and right ends of the jumper 6 are respectively hung on the second left hanging point and On the second right hitch.

The jumper 6 is insulated from the left ground support 4 and the right ground support 5 , and is electrically connected to the first jumper 9 and the second jumper 10 . The jumper 6 can be set in various structures, and on the premise of being easy to set, the following specific examples are given:

As shown in accompanying drawing 1, jumper 6 comprises: left insulator string 601, electric connector 602, right insulator string 603 connected in sequence; The left end of left insulator string 601 is suspended on the second left hanging point; The right end of 603 is hung on the second right hanging point; the electrical connector 602 is used for electrical connection with the first jumper 9 and the second jumper 10 .

Wherein, the electrical connector 602 can be set as a variety of metal parts with conductive functions. On the premise of reducing the weight of the tower and meeting the requirements of the electrical clearance of the first jumper 9 and the second jumper 10, the electrical connector 602 is a wire. Moreover, the electrical connector 602 can be selected from a steel wire with excellent load bearing capacity.

There are many ways of electrical connection between the electrical connector 602 and the first jumper 9 and the second jumper 10, in order to facilitate the stable transmission of current between the first jumper 9, the second jumper 10 and the electrical connector 602, further Under the premise of ensuring the electrical clearance between the first jumper 9 and the second jumper 10 , it is preferable that the electrical connection member 602 is electrically connected with the first jumper 9 and the second jumper 10 in a T-shaped manner.

The "T" shape means that after the first jumper 9 and the second jumper 10 are connected to the electrical connector 602, a "T" shape is formed, which can also be considered as the first jumper 9 and the second jumper 10 and the electrical connector 602 vertical electrical connection.

The "T"-shaped electrical connection is a well-known connection in the art, and will not be repeated here.

Specifically, both the front insulator string 7a and the rear insulator string 7b are tension insulator strings.

Both the front insulator string 7a and the rear insulator string 7b are set as tension insulator strings, which are convenient for bearing the tensile load of the three-phase wires. In order to facilitate the balance of force before and after the transposition tower, the number, specification and connection mode (series and parallel) of the front insulator string 7a and the rear insulator string 7b used to connect the front phase conductor and the rear phase conductor are the same.

In order to further ensure the electrical clearance of the third jumper 11 and the fourth jumper 12, and to avoid shaking of the third jumper 11 and the fourth jumper 12 under the action of natural factors (such as wind force), the left cross arm 2 and the right The free ends of the cross arms 3 are provided with lower hanging points for hanging the lower insulator strings 8, see accompanying drawing 1.

When using the third jumper 11 and the fourth jumper 12 to electrically connect the front middle phase conductor 15a and the rear left phase conductor 13b, the front right phase conductor 14a and the rear middle phase conductor 15b, respectively, the third jumper 11 and The fourth jumper 12 is connected with the two lower insulator strings 8 to ensure normal transposition.

Specifically, the lower insulator string 8 is a hanging insulator string.

The suspension type insulator string is mostly in a vertical state due to gravity, the third jumper wire 11 and the fourth jumper wire 12 are connected to the lower end of the suspension type insulator string so that the electrical clearance of the third jumper wire 11 and the fourth jumper wire 12 meets Requirements to ensure the normal and safe transposition of the transposition tower.

In this utility model embodiment, the front left phase conductor 13a and the first jumper 9, the second jumper 10 and the rear right phase conductor 14b, the third jumper 11 and the front middle phase conductor 15a and the rear left phase conductor 13b, The fourth jumper 12 is electrically connected to the front right phase conductor 14a and the rear middle phase conductor 15b in a T-shaped manner.

Such setting facilitates the stable transmission of current between the wire and the jumper, and by adjusting the position of the T-shaped electrical connection point, the first jumper 9, the second jumper 10, the third jumper 11, and the fourth jumper can be satisfied. The electrical clearance of line 12 meets the requirements.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. A transposition tower, comprising: a tower body (1), a left cross arm (2), and a right cross arm (3); The left cross arm (2) and the right cross arm (3) are arranged symmetrically, the connection ends are respectively connected to the top of the tower body (1), and the free ends are provided with a front hanging point and a rear hanging point. The hanging point and the rear hanging point are respectively used for hanging the front insulator string (7a) and the rear insulator string (7b); It is characterized in that the transposition tower further includes: a left ground wire support (4), a right ground wire support (5), and a jumper (6); The left ground wire support (4) and the right ground wire support (5) are arranged symmetrically, and the lower ends are respectively connected to the top walls of the connection ends of the left cross arm (2) and the right cross arm (3); The jumper (6) is arranged between the left ground support (4) and the right ground support (5), and is used for connecting with the first jumper (9) and the second jumper (10) electrical connection; The front and rear sides of the top of the tower body (1) are respectively provided with front and rear hanging points for suspending the front insulator string (7a) and the rear insulator string (7b). 2. The transposition tower according to claim 1, characterized in that the distance between the left ground wire support (4) and the right ground wire support (5) decreases gradually from top to bottom. 3. The transposition tower according to claim 1, characterized in that, a first left hanging point and a second hanging point are respectively provided outside the free ends of the left ground wire support (4) and the right ground wire support (5). A right hanging point is used to connect the left ground wire and the right ground wire respectively. 4. The transposition tower according to claim 1, characterized in that, the inner side of the left ground wire support (4) and the right ground wire support (5) are relatively provided with a second left hanging point and a second right hanging point; The left and right ends of the jumper (6) are hung on the second left hanging point and the second right hanging point respectively. 5. The transposition tower according to claim 4, characterized in that the jumper (6) comprises: a left insulator string (601), an electrical connector (602), a right insulator string (603) connected in sequence ); The left end of the left insulator string (601) is suspended on the second left hanging point; The right end of the right insulator string (603) is suspended on the second right hanging point; The electrical connector (602) is used for electrical connection with the first jumper (9) and the second jumper (10). 6. The transposition tower according to claim 5, characterized in that, the electrical connector (602) is a wire. 7. The transposition tower according to claim 6, characterized in that T Electrically connected in the form of a font. 8. The transposition tower according to claim 1, characterized in that, both the front insulator string (7a) and the rear insulator string (7b) are tension insulator strings. 9. The transposition tower according to claim 1, characterized in that, the free ends of the left cross arm (2) and the right cross arm (3) are provided with lower hanging points for hanging lower insulators string (8). 10. The transposition tower according to claim 9, characterized in that, the lower insulator string (8) is a suspension type insulator string.