Three-phase alternating current vacuum contactor

Abstract

The utility model relates to the field of electric transmission equipment, and discloses a three-phase alternating current vacuum contactor which comprises a three-phase alternating current vacuum contactor body, three sets of main contact output ends distributed at equal intervals are fixedly installed on the top of the three-phase alternating current vacuum contactor body, and installation grooves are formed in the front ends of the three sets of main contact output ends. A power connection pipe is fixedly installed in the installation groove, a live wire plug is slidably sleeved with the power connection pipe, a live wire is fixedly connected to the end of the live wire plug, the live wire plug is synchronously fixed in the power connection pipe through the three sets of fixing needles through the linkage plate, the time for sequentially inserting the live wire plug into the power connection pipe in each set is shortened, and the safety of the live wire plug is improved. The live wire plug has the advantages that the live wire plug is inserted into the jack, the operation efficiency during wiring is improved, the insulating pad isolates current for operators, the safety of the operators during wiring is protected, safety accidents are avoided, the live wire plug is effectively prevented from being separated from the power connection tube by inserting the fixing needle into the jack, and the stability of the live wire plug during operation is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of electric drive equipment, in particular to a three-phase AC vacuum contactor. Background Technique

[0002] The three-phase AC vacuum contactor is an important electrical appliance used for controlling and protecting circuits in medium and low voltage power systems. The traditional contactor uses air as the medium to extinguish the arc, but this method has poor effect under high voltage and large current conditions, and is prone to contact wear and even welding. With the development of the power system and the improvement of the reliability requirements, a more efficient arc extinguishing method is needed to ensure the stable operation of the contactor. In the prior art, when the three-phase AC vacuum contactor contacts the live wire, the end of the live wire needs to be inserted into the output end of the main contact, and then the live wire is fixed in the output end of the main contact by rotating an insulating pen. If two or more groups of live wires need to be connected, the working efficiency will be reduced. For this reason, we propose a three-phase AC vacuum contactor. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] In view of the deficiencies of the prior art, the utility model provides a three-phase AC vacuum contactor, which solves the above problems.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the utility model provides the following technical solutions: a three-phase AC vacuum contactor, including a three-phase AC vacuum contactor, three groups of main contact output ends are fixedly installed at the top of the three-phase AC vacuum contactor at equal intervals, installation grooves are opened at the front ends of the three groups of main contact output ends, a power connection tube is fixedly installed in the installation groove, a live wire plug is slidably sleeved in the power connection tube, and a live wire is fixedly connected to the end of the live wire plug. It also includes:

[0007] A synchronization component, which is installed on the top of the three-phase AC vacuum contactor and is used to control the three groups of main contact output ends simultaneously;

[0008] A fixing component, which is installed on the main contact output end and is used to reinforce the live wire plug to prevent the live wire plug from loosening during use.

[0009] Preferably, the synchronization component includes a main rod, an adjusting spring, a stop disk and a linkage plate. Vertical main rods are fixedly arranged between adjacent two groups of main contact output ends, a linkage plate is slidably connected between the two main rods, adjusting springs are sleeved on the two main rods corresponding to the upper position of the linkage plate, and stop disks are fixedly arranged at the tops of the two main rods.

[0010] Preferably, a handle for lifting the linkage plate is fixedly arranged at the top of the linkage plate corresponding to the two main rods.

[0011] Preferably, the fixing component includes a fixing pin and an insulating pad. Fixing pins are fixedly arranged directly above the corresponding three groups of main contact output ends on the top of the linkage plate, and an insulating pad for insulation is sleeved on the fixing pin near the top position.

[0012] Preferably, a plugging hole is formed in the top of the power connection tube, and a jack is formed in the top of the live wire plug.

[0013] Preferably, the bottom end of the fixing pin extends into the installation groove through the main contact output end, and the bottom end of the fixing pin is first slidably plugged into the jack through the plugging hole.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a three-phase AC vacuum contactor, which has the following beneficial effects:

[0016] 1. For this three-phase AC vacuum contactor, through the linkage plate, the three groups of fixing pins synchronously fix the live wire plug in the power connection tube, reducing the time required for each group to be inserted into the power connection tube in sequence, improving the operation efficiency during wiring. Secondly, through the insulating pad, the current is isolated for the operators, protecting the safety of the operators during wiring and avoiding the occurrence of safety accidents. In addition, by inserting the fixing pin into the jack, the live wire plug is effectively prevented from detaching from the power connection tube, ensuring the stability of the live wire plug during operation.

[0017] 2. For this three-phase AC vacuum contactor, by utilizing the resilience of the adjusting spring, the linkage plate drives the three groups of fixing pins to simultaneously insert into the jacks on the live wire plug. This structure is simple and practical, ensuring the consistency during operation and improving the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 is a side view of the utility model;

[0020] Figure 3 is a cross-sectional view of the main contact output end of the utility model.

[0021] In the figure: 1. Three-phase AC vacuum contactor; 2. Main contact output end; 3. Power connection tube; 4. Live wire plug; 5. Jack; 6. Live wire; 7. Installation groove; 8. Main rod; 9. Adjusting spring; 10. Stop disc; 11. Linkage plate; 12. Plugging hole; 13. Fixing pin; 14. Insulating pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1-3 , a three-phase AC vacuum contactor, including a three-phase AC vacuum contactor 1. Three groups of main contact output terminals 2 distributed at equal intervals are fixedly installed at the top of the three-phase AC vacuum contactor 1. Installation grooves 7 are opened at the front ends of the three groups of main contact output terminals 2. A power connection tube 3 is fixedly installed in the installation groove 7. A live wire plug 4 is slidably sleeved in the power connection tube 3. A live wire 6 is fixedly connected to the end of the live wire plug 4. It further includes:

[0024] A synchronization component, which is installed at the top of the three-phase AC vacuum contactor 1 and is used to control the three groups of main contact output terminals 2 simultaneously;

[0025] A fixing component, which is installed on the main contact output terminal 2 and is used to reinforce the live wire plug 4 to prevent the live wire plug 4 from loosening during use.

[0026] The synchronization component includes a main rod 8, an adjusting spring 9, a stop plate 10 and a linkage plate 11. Vertical main rods 8 are fixedly provided between adjacent two groups of main contact output terminals 2. A linkage plate 11 is slidably connected between the two main rods 8. Adjusting springs 9 are sleeved on the two main rods 8 corresponding to the upper position of the linkage plate 11. Stop plates 10 are fixedly provided at the tops of the two main rods 8. During use, first pull the handle to drive the linkage plate 11 to slide upward on the two main rods 8. During the upward movement of the linkage plate 11, the two adjusting springs 9 are compressed and deformed, causing the linkage plate 11 to approach the stop plate 10. At the same time, the fixing pin 13 starts to disengage from the main contact output terminal 2 through the upward movement of the linkage plate 11.

[0027] A handle for lifting the linkage plate 11 is fixedly provided at the top of the linkage plate 11 corresponding to the two main rods 8. Release the handle, and use the resilience of the two adjusting springs 9 to make the linkage plate 11 slide downward on the two main rods 8.

[0028] The fixing component includes a fixing pin 13 and an insulating pad 14. Fixing pins 13 are fixedly provided at the top of the linkage plate 11 corresponding to the directly above of the three groups of main contact output terminals 2. An insulating pad 14 for insulation is sleeved on the fixing pin 13 near the top. The insulating pad 14 prevents current from being generated during the process of the fixing pin 13 accessing the jack 5, causing danger.

[0029] The top of the power connection tube 3 is provided with a socket hole 12, and the top of the live wire plug 4 is provided with a jack 5. Then, the three groups of live wire plugs 4 are synchronously inserted into the three groups of power connection tubes 3 respectively. Next, the jack 5 on the live wire plug 4 is aligned with the socket hole 12, and then inserted into the jack 5 on the live wire plug 4 through the socket hole 12, so as to synchronously fix the three groups of live wire plugs 4.

[0030] The bottom end of the fixing pin 13 extends into the installation groove 7 through the main contact output end 2. The bottom end of the fixing pin 13 is first slidably inserted into the jack 5 through the socket hole 12, and the fixing pin 13 slides downward along with the linkage plate 11 and first enters the installation groove 7.

[0031] Working principle: When in use, first pull the handle to drive the linkage plate 11 to slide upward on the two main rods 8. During the upward movement of the linkage plate 11, the two adjusting springs 9 are compressed and deformed, causing the linkage plate 11 to approach the stop plate 10. At the same time, the fixing pin 13 starts to extend out of the main contact output end 2 due to the upward movement of the linkage plate 11. Then, the three groups of live wire plugs 4 are synchronously inserted into the three groups of power connection tubes 3 respectively. Next, the jack 5 on the live wire plug 4 is aligned with the socket hole 12. Release the handle, and use the resilience of the two adjusting springs 9 to make the linkage plate 11 slide downward on the two main rods 8. At the same time, the fixing pin 13 slides downward along with the linkage plate 11 and first enters the installation groove 7, and then is inserted into the jack 5 on the live wire plug 4 through the socket hole 12, so as to synchronously fix the three groups of live wire plugs 4. The insulating pad 14 prevents the fixing pin 13 from generating current and causing danger during the process of accessing the jack 5.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-phase AC vacuum contactor, comprising a three-phase AC vacuum contactor (1), and three groups of main contact output terminals (2) which are fixedly installed at the top of the three-phase AC vacuum contactor (1) and are equally spaced, characterized in that: Installation grooves (7) are formed at the front ends of the three groups of main contact output ends (2). A power connection tube (3) is fixedly installed in the installation groove (7). A live wire plug (4) is slidably sleeved in the power connection tube (3). A live wire (6) is fixedly connected to the end of the live wire plug (4). Further included are: A synchronization component, which is installed on the top of the three-phase AC vacuum contactor (1) and is used to control the three groups of main contact output ends (2) simultaneously; A fixing component, which is installed on the main contact output end (2) and is used to reinforce the live wire plug (4) to prevent the live wire plug (4) from loosening during use.

2. The three-phase AC vacuum contactor according to claim 1, wherein: The synchronization component includes a main rod (8), an adjusting spring (9), a stop disc (10) and a linkage plate (11). Vertical main rods (8) are fixedly arranged between adjacent two groups of main contact output ends (2). A linkage plate (11) is slidably connected between the two main rods (8). Adjusting springs (9) are sleeved on the two main rods (8) at positions corresponding to the upper side of the linkage plate (11). Stop discs (10) are fixedly arranged at the tops of the two main rods (8).

3. The three-phase AC vacuum contactor according to claim 2, characterized in that: A handle for lifting the linkage plate (11) is fixedly arranged at the top of the linkage plate (11) corresponding to the space between the two main rods (8).

4. The three-phase AC vacuum contactor according to claim 3, wherein: The fixing component includes a fixing needle (13) and an insulating pad (14). Fixing needles (13) are fixedly arranged at the top of the linkage plate (11) corresponding to the positions directly above the three groups of main contact output ends (2). Insulating pads (14) for insulation are sleeved on the fixing needles (13) near the top positions.

5. A three-phase AC vacuum contactor according to claim 1, characterized in that: A plugging hole (12) is formed at the top of the power connection tube (3). A jack (5) is formed at the top of the live wire plug (4).

6. A three-phase AC vacuum contactor according to claim 4, characterized in that: The bottom end of the fixing needle (13) extends into the installation groove (7) through the main contact output end (2). The bottom end of the fixing needle (13) is first slidably plugged into the jack (5) through the plugging hole (12).

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