Three-phase bridge rectifier

Abstract

The utility model discloses a three-phase bridge rectifier, and relates to the technical field of three-phase bridge rectifiers. The three-phase bridge rectifier comprises a three-phase bridge rectifier body and a terminal fixedly installed on the surface of the three-phase bridge rectifier body, and slots are formed in the upper surface of the three-phase bridge rectifier body at equal intervals. According to the utility model, through the arrangement of the protective cover, the exterior of the terminal can be covered, through the clamping of the sealing plate on the outer surface of the lead, the lead can be positioned, the falling of the connection part of the terminal after the lead is pulled is avoided, the stability is enhanced, and the safety is improved; the protective cover and the three-phase bridge rectifier main body can be quickly assembled together, and when the positioning bolt is rotated, the insertion column can be driven to slide downwards due to the friction force between the positioning bolt and the limiting groove, so that the sealing performance between the protective cover and the three-phase bridge rectifier main body is improved, the aging of the terminal is delayed, and the service life of the terminal is prolonged. And the service life of the three-phase bridge rectifier main body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of three-phase rectifier bridges, in particular to a three-phase rectifier bridge stack. Background Art

[0002] A three-phase bridge rectifier is a power electronic device used to convert alternating current into direct current. It consists of six electronic components that control thyristors or diodes, usually arranged in a specific connection pattern to form a bridge circuit. The function of these components is to convert the waveform of the AC input voltage into a DC output voltage. The three-phase bridge rectifier is usually used in high-power power systems such as motor drives, industrial power supplies, etc. to provide a stable DC power supply. Its advantages include high power conversion efficiency, good stability, and the ability to adapt to different power and voltage requirements. In a three-phase bridge rectifier, the three input phases are connected to the three phases of the bridge circuit respectively, and the output is provided through the positive and negative terminals of two polarities. By controlling the on and off state of the electronic components, the output voltage can be adjusted and controlled.

[0003] Most of the terminals in the three-phase rectifier bridge stack in the prior art are directly exposed to the outside. When the wires are connected to the terminals, the terminal connections are prone to fall off after the wires are pulled. At the same time, the terminals are directly exposed to the outside, which accelerates the aging of the terminals. Long-term use can easily cause poor contact at the terminal connections, affecting the service life of the three-phase rectifier bridge stack. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a three-phase rectifier bridge stack, which solves the problem that most of the terminals in the prior art three-phase rectifier bridge stack are directly exposed to the outside. When the wires are connected to the terminals, the terminal connections are prone to fall off after the wires are pulled. At the same time, the terminals are directly exposed to the outside, which accelerates the aging of the terminals. Long-term use can easily cause poor contact at the terminal connections, affecting the service life of the three-phase rectifier bridge stack.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a three-phase rectifier bridge stack, comprising a three-phase rectifier bridge stack body and terminals fixedly installed on the surface of the three-phase rectifier bridge stack body, the upper surface of the three-phase rectifier bridge stack body is provided with slots at equal intervals, the outer surface of the three-phase rectifier bridge stack body is provided with positioning bolts with equal intervals, the upper surface of the three-phase rectifier bridge stack body is fitted with a protective cover, the bottom of the protective cover is fixedly connected with plug posts at equal intervals, the surface of the plug posts is provided with limiting grooves, the surface of the protective cover is provided with positioning holes and sliding holes, the inside of the protective cover is slidably connected with a pressure plate, the top of the pressure plate is fixedly connected with a sliding plate, the side of the pressure plate is fixedly installed with a reset spring, the surface of the pressure plate away from the reset spring is fixedly connected with a sealing plate, and the upper surface of the protective cover is fixedly connected with clamping posts at equal intervals.

[0006] Preferably, one end of the positioning bolt close to the insertion column is hemispherical, and the surface of the positioning bolt abuts against the inner wall of the limiting groove.

[0007] Preferably, the outer surface of the plug post is inserted into the interior of the slot, and the limiting groove is trapezoidal.

[0008] Preferably, a sealing gasket is fixedly connected to the bottom of the protective cover, the top of the sliding plate extends to the upper surface of the protective cover, and the outer surface of the sliding plate is slidably connected to the inside of the sliding hole.

[0009] Preferably, the pressing plate is sealed and connected to the inner wall of the positioning hole via a sealing plate.

[0010] Preferably, the clamping column is "U"-shaped, the clamping column is a silicone ring, and the opening diameter of the clamping column is smaller than the outer diameter of the wire. Beneficial Effects

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The three-phase rectifier bridge stack can cover the outside of the terminal by setting a protective cover. When the wire is fixedly connected to the terminal, the sealing plate clamps the outer surface of the wire to position the wire, avoiding the terminal connection from falling off after the wire is pulled, thereby enhancing stability and improving safety.

[0013] 2. The three-phase rectifier bridge stack can quickly assemble the protective cover and the three-phase rectifier bridge stack body together by setting the plug-in column and the positioning bolt. Due to the shape of the limit groove, when the positioning bolt is rotated, the friction between the positioning bolt and the limit groove can drive the plug-in column to slide downward, thereby improving the sealing between the protective cover and the three-phase rectifier bridge stack body, delaying the aging of the terminal, and extending the service life of the three-phase rectifier bridge stack body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the positioning bolt and the plug column in the utility model.

[0016] Figure 3 It is a cross-sectional view of the protective cover in the utility model.

[0017] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0018] In the figure: 1. Three-phase rectifier bridge stack body; 2. Terminal; 3. Slot; 4. Positioning bolt; 5. Protective cover; 6. Insert column; 61. Limiting groove; 7. Positioning hole; 8. Sliding hole; 9. Reset spring; 10. Press plate; 11. Sealing plate; 12. Sliding plate; 13. Clamping column. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 The utility model provides a technical solution: a three-phase rectifier bridge stack, including a three-phase rectifier bridge stack body 1 and a terminal 2 fixedly installed on the surface of the three-phase rectifier bridge stack body 1, the upper surface of the three-phase rectifier bridge stack body 1 is equidistantly provided with slots 3, the outer surface of the three-phase rectifier bridge stack body 1 is equidistantly threaded with positioning bolts 4, the upper surface of the three-phase rectifier bridge stack body 1 is fitted with a protective cover 5, the bottom of the protective cover 5 is fixedly connected with a sealing gasket, the bottom of the protective cover 5 is equidistantly fixedly connected with a plug 6, the outer surface of the plug 6 is plugged into the inside of the slot 3, and the end of the positioning bolt 4 close to the plug 6 is a hemispherical The surface of the plug column 6 is provided with a limiting groove 61, and the limiting groove 61 is trapezoidal. The surface of the positioning bolt 4 abuts against the inner wall of the limiting groove 61. By providing the plug column 6 and the positioning bolt 4, the protective cover 5 and the three-phase rectifier bridge stack body 1 can be quickly assembled together. Moreover, due to the shape of the limiting groove 61, when the positioning bolt 4 is rotated, the friction between the positioning bolt 4 and the limiting groove 61 can drive the plug column 6 to slide downward, thereby improving the sealing between the protective cover 5 and the three-phase rectifier bridge stack body 1, delaying the aging of the terminal 2, and extending the service life of the three-phase rectifier bridge stack body 1;

[0021] The surface of the protective cover 5 is provided with a positioning hole 7 and a sliding hole 8. A pressure plate 10 is slidably connected inside the protective cover 5. A sliding plate 12 is fixedly connected to the top of the pressure plate 10. The top of the sliding plate 12 extends to the upper surface of the protective cover 5. The outer surface of the sliding plate 12 is slidably connected to the inside of the sliding hole 8. A reset spring 9 is fixedly installed on the side of the pressure plate 10. A sealing plate 11 is fixedly connected to the surface of the pressure plate 10 away from the reset spring 9. The pressure plate 10 is sealed and connected to the inner wall of the positioning hole 7 through the sealing plate 11. A clamping column 13 is equidistantly fixedly connected to the upper surface of the protective cover 5. The clamping column 13 is "U"-shaped and is a silicone ring. The opening diameter of the clamping column 13 is smaller than the outer diameter of the wire. By setting the protective cover 5, the outside of the terminal 2 can be covered. When the wire is fixedly connected to the terminal 2, the sealing plate 11 clamps the outer surface of the wire to position the wire, thereby avoiding the terminal connection from falling off after the wire is pulled, thereby enhancing stability and improving safety.

[0022] When in use, the pressing plate 10 is driven to slide by the sliding plate 12 to open the positioning hole 7, and then the wire is passed through the positioning hole 7 to fix the wire end with the terminal 2. After the connection, the plug column 6 is inserted into the slot 3, and the positioning bolt 4 is rotated to make the plug column 6 drive the protective cover 5 to slide downward, so that the protective cover 5 is fixedly connected to the three-phase rectifier bridge stack body 1. After the connection is completed, the wire is bent and squeezed into the inside of the clamping column 13. By setting the protective cover 5, the outside of the terminal 2 can be covered. When the wire is fixedly connected to the terminal 2, the sealing plate 11 clamps the outer surface of the wire to position the wire, thereby avoiding the terminal connection from falling off due to the wire being pulled, thereby enhancing stability and improving safety.

[0023] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A three-phase rectifier bridge stack, comprising a three-phase rectifier bridge stack body (1) and a terminal (2) fixedly mounted on the surface of the three-phase rectifier bridge stack body (1), characterized in that: The upper surface of the three-phase rectifier bridge stack body (1) is provided with slots (3) at equal intervals, the outer surface of the three-phase rectifier bridge stack body (1) is provided with positioning bolts (4) threadedly installed at equal intervals, the upper surface of the three-phase rectifier bridge stack body (1) is fitted with a protective cover (5), the bottom of the protective cover (5) is fixedly connected with a plug post (6) at equal intervals, the surface of the plug post (6) is provided with a limiting groove (61), the surface of the protective cover (5) is provided with a positioning hole (7) and a sliding hole (8), the inside of the protective cover (5) is slidably connected with a pressure plate (10), the top of the pressure plate (10) is fixedly connected with a sliding plate (12), the side of the pressure plate (10) is fixedly installed with a reset spring (9), the surface of the pressure plate (10) away from the reset spring (9) is fixedly connected with a sealing plate (11), and the upper surface of the protective cover (5) is fixedly connected with a clamping column (13) at equal intervals.

2. A three-phase rectifier bridge stack according to claim 1, characterized in that: One end of the positioning bolt (4) close to the plug post (6) is hemispherical, and the surface of the positioning bolt (4) abuts against the inner wall of the limiting groove (61).

3. A three-phase rectifier bridge stack according to claim 1, characterized in that: The outer surface of the plug post (6) is inserted into the interior of the slot (3), and the limiting groove (61) is trapezoidal.

4. A three-phase rectifier bridge stack according to claim 1, characterized in that: A sealing gasket is fixedly connected to the bottom of the protective cover (5), the top of the sliding plate (12) extends to the upper surface of the protective cover (5), and the outer surface of the sliding plate (12) is slidably connected to the inside of the sliding hole (8).

5. A three-phase rectifier bridge stack according to claim 1, characterized in that: The pressing plate (10) is sealedly connected to the inner wall of the positioning hole (7) via a sealing plate (11).

6. A three-phase rectifier bridge stack according to claim 1, characterized in that: The clamping column (13) is in a "U" shape, the clamping column (13) is a silicone ring, and the opening diameter of the clamping column (13) is smaller than the outer diameter of the wire.

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