Three-phase electrical fireproof current-limiting protector

Abstract

The utility model belongs to the technical field of fireproof current-limiting protectors, and particularly relates to a three-phase electrical fireproof current-limiting protector, which comprises a mounting plate, the front surface of the mounting plate is fixedly connected with a protector, the lower end of the protector is fixedly connected with a plurality of uniformly distributed wiring pipes, wires are inserted into the wiring pipes, and the wires are connected with the mounting plate. An auxiliary reinforcing mechanism is arranged at the lower end of the protector, four evenly-distributed positioning strips are fixedly connected to the outer side of the mounting plate, positioning pipes are slidably connected to the interiors of four kidney-shaped holes of the mounting plate, and limiting pipes are slidably connected to the interiors of the positioning pipes. According to the utility model, the fixing frame, the extrusion frame, the rubber block and other structures are additionally arranged on the protector, so that the rubber block II can be driven by the elastic force of the spring II to extrude an electric wire in the installation process of the electric wire, and the electric wire can be limited by the friction force between the rubber block and the electric wire in the extrusion process; therefore, the installation of the wire is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-proof current-limiting protectors, in particular to a three-phase electrical fire-proof current-limiting protector. Background Art

[0002] The invention patent with announcement number CN117220237A discloses a three-phase electrical fire-proof current-limiting protector, including a shell and an upper cover. Three independent hardware protection modules are arranged in the shell. The protection module is an overall modular structure, wherein each protection module includes a wiring terminal, a conductive strip and a drive circuit board. The wiring terminal is connected to the conductive strip. A single protection module is provided with two wiring terminals and two conductive strips. One of the two wiring terminals of each protection module is provided with a current transformer. The conductive strip is installed on the drive circuit board, and each protection module is detachably fixed in the shell. The patent makes the three-phase control circuit hardware independent, so that when one of them is damaged, only one of the protection modules needs to be replaced. Compared with the traditional replacement of the entire circuit, it is more convenient to repair and has a low maintenance cost. When the monitored electrical circuit is short-circuited, software and hardware dual protection are used, and the three phases are opened and disconnected to ensure three-phase balance.

[0003] However, when installing the wires in the existing three-phase electrical fire-proof current-limiting protector during use, the wires are inserted into the wiring tube and then routed, which easily leads to looseness between the wires and the wiring tube, resulting in poor contact. In addition, during the installation of the protector, the spacing between the installation holes inside the control cabinet is different, which makes the protector inconvenient to install. Therefore, improvements are needed. Utility Model Content

[0004] The utility model aims to provide a three-phase electrical fire-proof current-limiting protector, which solves the problems of unstable wire insertion and inconvenient adjustment of the position of the mounting seat.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-phase electrical fire-proof current-limiting protector, comprising a mounting plate, a protector is fixedly connected to the front side of the mounting plate, a plurality of evenly distributed wiring tubes are fixedly connected to the lower end of the protector, wires are plugged into the interior of the wiring tubes, an auxiliary reinforcement mechanism is provided at the lower end of the protector, four evenly distributed positioning strips are fixedly connected to the outer side of the mounting plate, positioning tubes are slidably connected to the four waist holes of the mounting plate, the interior of the positioning tubes is slidably connected to a limiting tube, a connecting tube is fixedly connected to the interior of the positioning tube, a spring is provided inside the positioning tube, the outer side of the positioning tube is fixedly connected to a limiting tooth, and a control panel is fixedly installed on the front side of the protector.

[0006] Preferably, one end of the spring one is fixedly connected to the positioning tube, the other end of the spring one is fixedly connected to the limiting tube, the connecting tube is slidably connected to the limiting tube, the limiting tube is slidably connected to the mounting plate, and the connecting tube can increase the connection stability between the limiting tube and the positioning tube.

[0007] Preferably, the limiting teeth are slidably connected to the tooth grooves of the positioning bar, the positioning tube is slidably connected to the positioning bar, the positioning bar is fixedly connected to the protector, and the limiting teeth can limit the positioning tube.

[0008] Preferably, the auxiliary reinforcement mechanism includes a fixing frame, the lower end of the protector is fixedly connected to the fixing frame, the interior of the fixing frame is slidably connected to a connecting nail, one end of the connecting nail is fixedly connected to an extrusion frame, a second spring is provided on the outer side of the connecting nail, a side of the fixing frame close to the wire is fixedly connected to a first rubber block, a side of the extrusion frame close to the wire is fixedly connected to a second rubber block, and a side of the extrusion frame away from the second rubber block is fixedly connected to a handle, and the handle can drive the second rubber block inside the extrusion frame to move.

[0009] Preferably, the rubber block 1 and the rubber block 2 are both in contact with the wiring tube, the rubber block 1 and the rubber block 2 are both in contact with the wire, the rubber block 1 is in contact with the rubber block 2, and the rubber block 1 and the rubber block 2 can limit the wire by friction.

[0010] Preferably, one end of the second spring is fixedly connected to the fixing frame, and the other end of the second spring is fixedly connected to the connecting nail, and the second spring can support the connecting nail through elastic force.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model adds structures such as a fixing frame, an extrusion frame and a rubber block to the protector. During the installation of the wire, the elastic force of the second spring can drive the rubber block to squeeze the wire. During the extrusion process, the friction between the rubber block and the wire can limit the wire, thereby making the installation of the wire more stable.

[0013] 2. The utility model adds structures such as positioning strips, positioning tubes and limiting teeth on the mounting plate. During use, the positioning tube can be limited by the limiting teeth on the outside of the positioning tube and the tooth grooves of the positioning strip. The installation position can be adjusted by adjusting the position of the limiting teeth on the positioning strip, so that the protector can be suitable for a variety of control cabinets, making the protector more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall structure of the utility model is three-dimensional Figure 1 ;

[0015] Figure 2 The overall structure of the utility model is three-dimensional Figure 2 ;

[0016] Figure 3 For the utility model Figure 1 A three-dimensional enlarged view of the positioning tube;

[0017] Figure 4 For the utility model Figure 3 A bottom sectional view of

[0018] Figure 5 For the utility model Figure 2 A-section structure enlarged view.

[0019] In the figure: 1. mounting plate; 2. protector; 3. wiring tube; 4. electric wire; 5. auxiliary reinforcement mechanism; 6. positioning strip; 7. positioning tube; 8. limiting tube; 9. connecting tube; 10. spring 1; 11. limiting tooth; 12. control panel; 51. fixing frame; 52. connecting nail; 53. extrusion frame; 54. spring 2; 55. rubber block 1; 56. rubber block 2; 57. handle. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 A three-phase electrical fire-proof current-limiting protector comprises a mounting plate 1, a protector 2 is fixedly connected to the front of the mounting plate 1, a plurality of evenly distributed wiring tubes 3 are fixedly connected to the lower end of the protector 2, a wire 4 is plugged into the wiring tube 3, an auxiliary reinforcement mechanism 5 is arranged at the lower end of the protector 2, four evenly distributed positioning strips 6 are fixedly connected to the outer side of the mounting plate 1, positioning tubes 7 are slidably connected to the inside of the four waist holes of the mounting plate 1, a limiting tube 8 is slidably connected to the inside of the positioning tube 7, a connecting tube 9 is fixedly connected to the inside of the positioning tube 7, a spring 10 is arranged inside the positioning tube 7, one end of the spring 10 is fixedly connected to the positioning tube 7, the other end of the spring 10 is fixedly connected to the limiting tube 8, a limiting tooth 11 is fixedly connected to the outer side of the positioning tube 7, and a control panel 12 is fixedly installed on the front of the protector 2.

[0022] See also Figure 1 , Figure 3 , Figure 4 The connecting tube 9 is slidably connected to the limiting tube 8, the limiting tube 8 is slidably connected to the mounting plate 1, the connecting tube 9 can increase the connection stability of the limiting tube 8 and the positioning tube 7, the limiting teeth 11 are slidably connected to the tooth grooves of the positioning strip 6, the positioning tube 7 is slidably connected to the positioning strip 6, the positioning strip 6 is fixedly connected to the protector 2, and the limiting teeth 11 can limit the positioning tube 7.

[0023] See also Figure 1 , Figure 2 , Figure 5 The auxiliary reinforcement mechanism 5 includes a fixing frame 51, the lower end of the protector 2 is fixedly connected to the fixing frame 51, the interior of the fixing frame 51 is slidably connected to a connecting nail 52, one end of the connecting nail 52 is fixedly connected to an extrusion frame 53, and a spring 2 54 is arranged on the outer side of the connecting nail 52. A rubber block 1 55 is fixedly connected to the side of the fixing frame 51 close to the wire 4, a rubber block 2 56 is fixedly connected to the side of the extrusion frame 53 close to the wire 4, and a handle 57 is fixedly connected to the side of the extrusion frame 53 away from the rubber block 2 56. The handle 57 can be To drive the rubber block 2 56 inside the extrusion frame 53 to move, the rubber block 1 55 and the rubber block 2 56 are both in contact with the wiring tube 3, the rubber block 1 55 and the rubber block 2 56 are both in contact with the wire 4, the rubber block 1 55 is in contact with the rubber block 2 56, the rubber block 1 55 and the rubber block 2 56 can limit the wire 4 by friction, one end of the spring 2 54 is fixedly connected to the fixing frame 51, and the other end of the spring 2 54 is fixedly connected to the connecting nail 52, and the spring 2 54 can support the connecting nail 52 by elastic force.

[0024] The specific implementation process of the utility model is as follows: when in use, the positioning tube 7 is pulled, and the positioning tube 7 squeezes the spring 10. When the limiting teeth 11 on the outer side of the positioning tube 7 are separated from the limiting groove of the current positioning strip 6, the position of the positioning tube 7 can be adjusted. After adjusting to the appropriate position, the positioning tube 7 is released, and the spring 10 is reset. The spring 10 can slide into the limiting groove of the positioning strip 6 through the limiting teeth 11 on the outer side of the positioning tube 7, so that the protector 2 can be more convenient to install;

[0025] When installing the wire 4 of the protector 2, pull the handle 57 upwards, the handle 57 drives the extrusion frame 53 to move, and squeezes the spring 2 54, and then the wire 4 passes through the middle of the rubber block 1 55 and the rubber block 2 56 and is inserted into the inside of the wiring tube 3. After the connection is completed, release the handle 57, the spring 2 54 is reset, and the spring 2 54 can drive the rubber block 2 56 to be squeezed on the outside of the wire 4 through the elastic force, and the friction between the wire 4 and the rubber block 2 56 is used to assist in limiting the wire 4, thereby further increasing the connection stability of the wire 4.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-phase electrical fire-proof current-limiting protector, comprising a mounting plate (1), characterized in that: The front side of the mounting plate (1) is fixedly connected to a protector (2), the lower end of the protector (2) is fixedly connected to a plurality of evenly distributed wiring tubes (3), the interior of the wiring tubes (3) is plugged with electric wires (4), the lower end of the protector (2) is provided with an auxiliary reinforcement mechanism (5), the outer side of the mounting plate (1) is fixedly connected to four evenly distributed positioning strips (6), the interior of the four waist holes of the mounting plate (1) is slidably connected to positioning tubes (7), the interior of the positioning tubes (7) is slidably connected to a limiting tube (8), the interior of the positioning tubes (7) is fixedly connected to a connecting tube (9), the interior of the positioning tubes (7) is provided with a spring (10), the outer side of the positioning tubes (7) is fixedly connected to a limiting tooth (11), and the front side of the protector (2) is fixedly installed with a control panel (12).

2. A three-phase electrical fire-proof current-limiting protector according to claim 1, characterized in that: One end of the spring 1 (10) is fixedly connected to the positioning tube (7), the other end of the spring 1 (10) is fixedly connected to the limiting tube (8), the connecting tube (9) is slidably connected to the limiting tube (8), and the limiting tube (8) is slidably connected to the mounting plate (1).

3. A three-phase electrical fire-proof current-limiting protector according to claim 1, characterized in that: The limiting teeth (11) are slidably connected to the tooth grooves of the positioning strip (6), the positioning tube (7) is slidably connected to the positioning strip (6), and the positioning strip (6) is fixedly connected to the protector (2).

4. A three-phase electrical fire-proof current-limiting protector according to claim 1, characterized in that: The auxiliary reinforcement mechanism (5) comprises a fixing frame (51), the lower end of the protector (2) is fixedly connected to the fixing frame (51), a connecting nail (52) is slidably connected inside the fixing frame (51), one end of the connecting nail (52) is fixedly connected to an extrusion frame (53), a second spring (54) is arranged on the outer side of the connecting nail (52), a first rubber block (55) is fixedly connected to a side of the fixing frame (51) close to the electric wire (4), a second rubber block (56) is fixedly connected to a side of the extrusion frame (53) close to the electric wire (4), and a handle (57) is fixedly connected to a side of the extrusion frame (53) away from the second rubber block (56).

5. A three-phase electrical fire-proof current-limiting protector according to claim 4, characterized in that: The rubber block 1 (55) and the rubber block 2 (56) are both in contact with the wiring tube (3), the rubber block 1 (55) and the rubber block 2 (56) are both in contact with the wire (4), and the rubber block 1 (55) is in contact with the rubber block 2 (56).

6. A three-phase electrical fire-proof current-limiting protector according to claim 4, characterized in that: One end of the second spring (54) is fixedly connected to the fixing frame (51), and the other end of the second spring (54) is fixedly connected to the connecting pin (52).

Images