CN203301039U - Composite high-voltage combined electrical appliance and monopole structure thereof - Google Patents

Abstract

The utility model discloses a composite high-voltage combined electric appliance and its monopole structure. The monopole structure includes a circuit breaker which moves along the left and right opening and closing. Among them, the upper part of the current transformer on the right side is fixed with a linear transmission type three-position isolating grounding switch that moves along the left and right opening and closing, and the right end of the three-position isolating grounding switch is fixed with an incoming line sleeve that is inclined to the upper right Pipe unit; the upper part of the current transformer on the left is fixed with an outlet bushing unit inclined to the upper left. This layout makes full use of the space, and has the advantages of simple structure and reasonable layout; more importantly, the single poles are installed vertically, so that the interphase transmission and connection parts can bear the load evenly, and the mechanical stability is good.

Description

Composite High Voltage Combined Apparatus and Its Unipolar Structure

technical field

The utility model relates to an SF6 gas-insulated fully-enclosed composite high-voltage combined electric appliance and a single-pole structure thereof.

Background technique

Combined electrical appliances are devices that combine two or more high-voltage electrical appliances into a whole according to the main wiring requirements of the power system, and each high-voltage electrical appliance still maintains the original specified performance. According to the insulation structure, it is divided into open type and fully enclosed type. Combined electrical appliances are generally arranged with multi-poles, and each single pole is an independent structure. Therefore, the selection and assembly combination of high-voltage electrical appliances in single-phase has a great impact on the overall performance of the entire combined electrical appliance (such as structure, size, phase-to-phase transmission synchronization, mechanical stability, etc.) Sex, etc.) have a great influence.

For example, Chinese patent CN101989733A discloses a composite high-voltage combined electrical appliance, which is a closed type, including three single poles arranged at intervals in the front and back, each single pole includes a circuit breaker fixed on the bracket, and three left and right intervals are fixed on the circuit breaker Arranged three-position isolating grounding switch, wherein, the three-positioning isolating and grounding switch on the far right is fixed with bushings by fixing many current transformers on it, and the other two three-position isolating and grounding switches are directly fixed on it. Set bushings; among the three single poles, the three three-position isolation grounding switches corresponding to the middle single pole are all fixed on the upper part of the circuit breaker, that is, installed vertically, and the three-position isolation grounding switches corresponding to the side-phase electrodes on both sides The switches are all installed on the upper side of the respective circuit breaker, that is, inclined installation. The combined electrical appliance adopts the side-phase unipolar oblique installation method. When the high-parameter current transformer is assembled, affected by the gravity of the transformer, the coupling of the drive shaft between the phases of the circuit breaker will bear a large stress, which will affect the operational stability of the circuit breaker. And mechanical life; at the same time, this combination of single poles uses three three-position isolation grounding switches, which has high cost, complex overall structure, and high overall height, which cannot make rational use of space.

Utility model content

The purpose of this utility model is to provide a composite high-voltage combined electrical appliance suitable for assembly of high-parameter current transformers, which is used to solve the problem of low operational stability of circuit breakers caused by side-phase unipolar inclined installation of existing combined electrical appliances.

The unipolar structure of the composite high-voltage combined electrical appliance of the utility model adopts the following technical scheme: a unipolar structure of the composite high-voltage combined electrical appliance, including a circuit breaker that moves along the left and right opening and closing gates, and the upper part of the circuit breaker is vertically fixed with a Two current transformers arranged at intervals on the left and right, among them, the upper part of the current transformer on the right side is fixed with a linear transmission type three-position isolating grounding switch that moves along the left and right opening and closing, and the moving contact of the three-position isolating grounding switch is connected to the The static contacts of the circuit breaker are conductively connected with the right conductor that vertically passes through the corresponding current transformer coil, and the right end of the three-station isolating grounding switch is fixed with an incoming line bushing unit that is inclined upward to the right. The incoming line conductor of the line bushing unit is conductively connected with the isolated static contact of the three-position isolating grounding switch; the upper part of the left current transformer is fixed with an outgoing line bushing unit inclined to the upper left, and the outgoing line of the outgoing line bushing unit A left conductor that vertically passes through the coil of the corresponding current transformer is conductively connected between the conductor and the moving contact of the circuit breaker.

The line inlet bushing unit is fixed on the three-station isolated grounding switch through the incoming line curved cylinder, one end of the curved cylinder is detachably connected to the right end of the three-station isolated grounded open tube through a flange, and the other end is connected to the three-station isolated grounding switch. The corresponding end of the inlet sleeve unit is fixedly connected.

The outgoing line bushing unit is fixed on the corresponding current transformer through the outgoing line curved cylinder. One end of the curved cylinder is detachably connected to the corresponding current transformer through the flange, and the other end is connected to the corresponding end of the outgoing line bushing unit. Fixed connection.

The inlet and outlet bushing units of the two side phase monopoles in the three-phase monopole are respectively expanded relative to the inlet and outlet bushing units of the middle phase monopole by rotating the corresponding curved cylinder.

The circuit breaker is a tank-type sulfur hexafluoride circuit breaker. There is a first pot-type insulator between the housing of the right current transformer and the housing of the grounding switch to separate the air chambers of the two, and the grounding switch There is a second pot-type insulator separating the air chambers of the two between the housing of the incoming line bushing unit and the tube body of the incoming line bushing unit, and there is a The third pot insulator separated by the two air chambers.

The composite high-voltage combined electrical appliance of the utility model adopts the following technical scheme: a composite high-voltage combined electrical appliance, including a bracket and three monopoles fixed on the bracket and arranged at intervals along the front and rear directions. For circuit breakers with gate movement, the upper part of the circuit breaker is vertically fixed with two current transformers arranged at intervals from left to right, among which, the upper part of the right current transformer is fixed with a linear transmission type three-station that moves along the left and right opening and closing. Isolating grounding switch, the moving contact of the three-position isolating grounding switch is conductively connected with the static contact of the circuit breaker, and the right conductor vertically passes through the coil of the corresponding current transformer, and the right end of the three-positioning isolating grounding switch There is a line-incoming bushing unit inclined to the upper right, and the line-in conductor of the line-incoming bushing unit is conductively connected with the isolated static contact of the three-position isolating grounding switch; the upper part of the left current transformer is fixed with a The outlet bushing unit inclined at the upper left, the left conductor vertically passing through the corresponding current transformer coil is conductively connected between the outlet conductor of the outlet bushing unit and the moving contact of the circuit breaker.

The line inlet bushing unit is fixed on the three-station isolated grounding switch through the incoming line curved cylinder, one end of the curved cylinder is detachably connected to the right end of the three-station isolated grounded open tube through a flange, and the other end is connected to the three-station isolated grounding switch. The corresponding end of the inlet sleeve unit is fixedly connected.

The outgoing line bushing unit is fixed on the corresponding current transformer through the outgoing line curved cylinder. One end of the curved cylinder is detachably connected to the corresponding current transformer through the flange, and the other end is connected to the corresponding end of the outgoing line bushing unit. Fixed connection.

The inlet and outlet bushing units of the two side phase monopoles in the three-phase monopole are respectively expanded relative to the inlet and outlet bushing units of the middle phase monopole by rotating the corresponding curved cylinder.

The circuit breaker is a tank-type sulfur hexafluoride circuit breaker. There is a first pot-type insulator between the housing of the right current transformer and the housing of the grounding switch to separate the air chambers of the two, and the grounding switch There is a second pot-type insulator separating the air chambers of the two between the housing of the incoming line bushing unit and the tube body of the incoming line bushing unit, and there is a The third pot insulator separated by the two air chambers.

With the unipolar structure of the above structure, two current transformers are fixed vertically on the upper part of the circuit breaker, and one of the current transformers is fixed with a linear transmission type three-position isolating grounding switch, and the incoming line bushing unit It is fixed on the three-position isolation grounding switch, and the outlet bushing unit is fixed on another current transformer. This layout makes full use of the space and has the advantages of simple structure and reasonable layout; more importantly, the single-pole The vertical installation method is adopted, so that the transmission and connection parts between the phases can bear the load evenly, and the mechanical stability is good.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the composite high-voltage combined electrical appliance of the present invention;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the top view of Fig. 1;

FIG. 4 is a cross-sectional view of the monopole structure in FIG. 1 .

Detailed ways

The embodiment of the composite high-voltage combined electric appliance of the present invention: as shown in Figure 1-3, it includes a bracket 1, and the bracket 1 is fixed with three monopoles arranged at intervals along the front and rear directions, and the monopole is composed of a circuit breaker 2, a current transformer 3. It is composed of a grounding switch 6, an incoming bushing unit 4 and an outgoing bushing unit 8.

The circuit breaker 2 adopts a recumbent tank type sulfur hexafluoride circuit breaker, including a circuit breaker housing 21. The circuit breaker static contact 22 is fixed on the right side inside the circuit breaker housing 21, and the left and right sides of the circuit breaker housing 21 The guide movement is equipped with a circuit breaker movable contact 23. The left end of the circuit breaker movable contact 23 is connected to the first rotating shaft 9 of the operating mechanism through the first crank arm. Under the rotation of the first rotating shaft 9, the circuit breaker is driven. The moving contact 23 moves left and right and cooperates with the static contact of the circuit breaker to realize the opening and closing action of the circuit breaker 2 .

There are two current transformers 3, which are external current transformers respectively. The two current transformers 3 are fixed vertically on the upper part of the circuit breaker housing 21 and arranged at intervals from left to right, including the transformer housing 32 and the transformer housing 32. The coil 31 inside the device housing 32. The three-position isolating and grounding switch 6 is fixed on the upper part of the transformer housing on the right side, and is a linear transmission type three-position isolating and grounding switch, including a switch housing 63, and the left side of the switch housing 63 is provided with a grounding static contact The head 62 and the right side are provided with an isolated static contact 65, and between the grounding static contact 62 and the isolated static contact 65, a switch movable contact 64 that guides and moves along the left and right directions is provided, and the left end of the switch movable contact 64 is fixed with a Insulated pull rod 61, the left end of the insulated pull rod 61 is connected to the second rotating shaft 11 of the operating mechanism through the second crank arm. Under the rotation of the second rotating shaft 11, the moving contact 64 of the drive switch moves left and right and connects with the grounding static contact. 62 and the isolation static contact 65 cooperate to complete the grounding or isolation opening and closing action, and the switch movable contact 64 and the circuit breaker static contact 22 are also conductively connected with the right conductor that vertically passes through the coil of the right current transformer 14. The incoming line bushing unit 4 is fixed on the right end of the three-position isolating grounding switch 6 through the incoming line curved cylinder 7, and one end of the incoming line curved cylinder 7 is detachable from the right end of the three-position isolating grounding switch 6 through the flange The other end is fixedly connected with the corresponding end of the inlet sleeve unit 4, so that the inlet sleeve unit 4 is inclined to the upper right; the inlet sleeve unit 4 includes an inlet pipe body 41 and an axially inserted The incoming line conductor 42 inside the pipe body 41 is electrically connected to the isolated static contact 65 . The outgoing line bushing unit 8 is fixed on the left current transformer through the outgoing line curved cylinder 5, one end of the outgoing line curved cylinder 5 is detachably connected to the left current transformer through the flange, and the other end is connected to the outgoing line bushing unit 8 The corresponding end is fixedly connected, so that the outlet sleeve unit 8 is inclined to the upper left; the outlet sleeve unit 8 includes an outlet pipe body 82 and an outlet conductor 81 axially inserted in the outlet pipe body 82, and the outlet conductor 81 and The left electric conductor 9 vertically passing through the coil of the left current transformer is electrically connected between the moving contacts 23 of the circuit breaker. the

As a further optimization, a first basin insulator 12 is provided between the right transformer housing and the switch housing 63, and the first basin insulator 12 connects the air chamber of the right current transformer and the three-position isolating grounding switch 6 The air chamber is separated; the second basin insulator 13 is arranged between the switch housing 63 and the inlet pipe body 41, and the second basin insulator 13 separates the air chamber of the three-position grounding switch and the inlet bushing unit. The air chamber is separated; a third basin insulator 10 is provided between the left transformer shell and the outlet pipe body, and the third basin insulator 10 connects the air chamber of the left current transformer and the air chamber of the outlet bushing unit separated. In this way, each independent air chamber can be filled with SF6 gas of different pressures, which reduces the cost of materials, and ensures that different modules can be operated independently during transportation and maintenance, which reduces the difficulty of transportation and improves maintenance efficiency; in addition, in the circuit breaker During the opening and closing process, it can also prevent the dust generated by the arc extinguishing chamber from intruding into the three-position isolating grounding switch.

As a further optimization, since the inlet and outlet bending cylinders are detachably connected to the left transformer and the three-position isolating grounding switch through flanges, the two side-phase unipolar inlet bushing units pass through the rotating inlet bend The cylinders are respectively expanded outwards, forming an angle of 30° with the incoming line bushing units corresponding to the middle single pole; at the same time, the outgoing line bushing units of the side phase single poles are respectively expanded outwards by rotating the outgoing line curved cylinder, and are connected with the middle single pole The angle between the corresponding outlet bushing units is also called 30°; in this way, the inlet and outlet bushings of the outer single pole are opened at a certain angle to ensure a reliable insulation distance.

The embodiment of the monopole structure of the utility model invention: as shown in Fig. 1-4, is consistent with the structure of the monopole in the above-mentioned embodiment, and its content will not be repeated here.

Claims (10)

1. the monopolar configuration of a composite type high-voltage combined electrical apparatus, it is characterized in that: comprise the circuit breaker that moves along the left and right divide-shut brake, the top of circuit breaker vertically is installed with two spaced apart current transformers in left and right, wherein, the top of right side current transformer is installed with straight-line transmitting ejector half three station isolation grounding switchs that move along the left and right divide-shut brake, conduct electricity and be connected with between the moving contact of three station isolation grounding switchs and the fixed contact of circuit breaker, vertically pass the right electric conductor of corresponding current mutual inductor coil, and the right-hand member of three station isolation grounding switchs is installed with towards the entrance bushing unit of upper right side inclination, the inlet wire electric conductor of entrance bushing unit is connected with the isolation fixed contact of three station isolation grounding switchs conduction, the top of left side current transformer is installed with towards the outlet casing tube unit of upper left side inclination, and between the outlet electric conductor of outlet casing tube unit and the moving contact of circuit breaker, conduction is connected with, vertically passes the left electric conductor of corresponding current mutual inductor coil.

2. the monopolar configuration of composite type high-voltage combined electrical apparatus according to claim 1, it is characterized in that: described entrance bushing unit is installed in three stations isolation ground connection by the curved cylindrical shell of inlet wire and opens, the right-hand member that an end of curved cylindrical shell and three stations are isolated the ground connection open pipe by flange removablely be connected, the corresponding end of the other end and entrance bushing unit is connected.

3. the monopolar configuration of composite type high-voltage combined electrical apparatus according to claim 2, it is characterized in that: described outlet casing tube unit is installed on corresponding current transformer by the curved cylindrical shell of outlet, an end of curved cylindrical shell by flange and corresponding current transformer removablely be connected, the corresponding end of the other end and outlet casing tube unit is connected.

4. the monopolar configuration of composite type high-voltage combined electrical apparatus according to claim 3 is characterized in that: two limit phase one poles in described three-phase one pole into and out of the thread casing unit respectively relatively in the middle of the mode that relies on the corresponding curved cylindrical shell of rotation into and out of the thread casing unit of phase one pole extend out respectively.

5. the monopolar configuration of according to claim 1-4 described composite type high-voltage combined electrical apparatus of any one, it is characterized in that: described circuit breaker is pot-type sulfur hexafluoride circuit breaker, has the first disc insulator that both air chamber is separated between the housing of described right side current transformer and the housing of earthed switch, have the second disc insulator that both air chamber is separated between the body of the housing of earthed switch and entrance bushing unit, have the 3rd disc insulator that both air chamber is separated between the body of the housing of left side current transformer and outlet casing tube unit.

6. composite type high-voltage combined electrical apparatus, comprise support and be installed on support, along spaced apart three one poles of fore-and-aft direction, it is characterized in that: one pole comprises the circuit breaker that moves along the left and right divide-shut brake, the top of circuit breaker vertically is installed with two spaced apart current transformers in left and right, wherein, the top of right side current transformer is installed with straight-line transmitting ejector half three station isolation grounding switchs that move along the left and right divide-shut brake, conduct electricity and be connected with between the moving contact of three station isolation grounding switchs and the fixed contact of circuit breaker, vertically pass the right electric conductor of corresponding current mutual inductor coil, and the right-hand member of three station isolation grounding switchs is installed with towards the entrance bushing unit of upper right side inclination, the inlet wire electric conductor of entrance bushing unit is connected with the isolation fixed contact of three station isolation grounding switchs conduction, the top of left side current transformer is installed with towards the outlet casing tube unit of upper left side inclination, and between the outlet electric conductor of outlet casing tube unit and the moving contact of circuit breaker, conduction is connected with, vertically passes the left electric conductor of corresponding current mutual inductor coil.

7. composite type high-voltage combined electrical apparatus according to claim 6, it is characterized in that: described entrance bushing unit is installed in three stations isolation ground connection by the curved cylindrical shell of inlet wire and opens, the right-hand member that an end of curved cylindrical shell and three stations are isolated the ground connection open pipe by flange removablely be connected, the corresponding end of the other end and entrance bushing unit is connected.

8. composite type high-voltage combined electrical apparatus according to claim 7, it is characterized in that: described outlet casing tube unit is installed on corresponding current transformer by the curved cylindrical shell of outlet, an end of curved cylindrical shell by flange and corresponding current transformer removablely be connected, the corresponding end of the other end and outlet casing tube unit is connected.

9. composite type high-voltage combined electrical apparatus according to claim 8 is characterized in that: two limit phase one poles in described three-phase one pole into and out of the thread casing unit respectively relatively in the middle of the mode that relies on the corresponding curved cylindrical shell of rotation into and out of the thread casing unit of phase one pole extend out respectively.

10. according to claim 6-9 described composite type high-voltage combined electrical apparatus of any one, it is characterized in that: described circuit breaker is pot-type sulfur hexafluoride circuit breaker, has the first disc insulator that both air chamber is separated between the housing of described right side current transformer and the housing of earthed switch, have the second disc insulator that both air chamber is separated between the body of the housing of earthed switch and entrance bushing unit, have the 3rd disc insulator that both air chamber is separated between the body of the housing of left side current transformer and outlet casing tube unit.

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