Thermal overload relay convenient to overhaul

Abstract

The utility model discloses a thermal overload relay convenient for maintenance, which relates to the technical field of thermal overload relays, and comprises an upper shell, a copper pin, a lower shell, a reset button, a wiring port, a switch contact and a plug block, the top of the upper shell is connected with the copper pin, the bottom of the upper shell is provided with the lower shell, and the lower shell is connected with the reset button. And a reset button is mounted at the front part of the lower shell. According to the thermal overload relay convenient to overhaul, when two groups of trapezoidal blocks are extruded, a guide block can be driven to move, a spring can be compressed while the trapezoidal blocks move, when the spring is compressed to a specified degree, the two groups of trapezoidal blocks can slide into a butt joint block through a through groove, and the position of a locking screw can be adjusted according to actual conditions; the installation position of the thermal overload relay can be installed and fixed according to different conditions, the installation position of the thermal overload relay is diversified by adjusting the installation position of the locking screw, and therefore the practicability of the thermal overload relay is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal overload relays, in particular to a thermal overload relay which is convenient for maintenance. Background Art

[0002] A power plant is a power plant that converts some form of raw energy into electrical energy for fixed facilities or transportation. During the use of a power plant, various electrical thermal control devices are used, and thermal overload relays are one of them. Thermal overload relays are an electrical protection component. Existing thermal overload relays still have certain defects when in use.

[0003] In the prior art, thermal overload relays are usually used to protect electrical equipment such as motors, transformers, and capacitors. Once the current exceeds the rated current of the equipment, the thermal overload relay will automatically open, cut off the power supply, and protect the equipment from overload. Thermal overload relays are bound to fail during use, and various tools are required to disassemble the upper shell of the thermal overload relay during maintenance, so as to perform maintenance work on the inside of the thermal overload relay. This maintenance method is relatively inconvenient. Utility Model Content

[0004] The utility model aims to provide a thermal overload relay which is convenient for maintenance, so as to solve the problem that the thermal overload relays in the current market are inconvenient to maintain as mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a thermal overload relay that is easy to maintain, comprising: an upper shell, a copper pin, a lower shell, a reset button, a wiring port, a switch contact and a plug-in block, the top of the upper shell is connected to the copper pin, the bottom of the upper shell is provided with a lower shell, the front of the lower shell is equipped with a reset button, the front of the lower shell away from the reset button is equipped with a wiring port, the front of the lower shell close to the wiring port is equipped with a switch contact, and the plug-in block is welded to both sides of the upper shell, both sides of the lower shell are welded with connecting blocks, the interior of the connecting block is welded with a flexible plastic card block, both sides of the lower shell are welded with fixing blocks, the interior of the fixing block is penetrated by a through groove, both sides of the upper shell close to the fixing block are welded with docking blocks, the interior of the docking block is connected with a spring, one end of the spring is connected with a trapezoidal block, and the top of the trapezoidal block is connected with a guide block.

[0006] Preferably, a snap-fit ​​structure is formed between the plug-in block and the flexible plastic card block, and a sliding structure is formed between the plug-in block and the connecting block.

[0007] Preferably, the docking blocks are arranged in two groups symmetrically about the center of the upper shell.

[0008] Preferably, a connecting plate is installed on the back of the lower shell, and a knob is connected to the internal thread of the connecting plate.

[0009] Preferably, a sliding block is movably connected inside the connecting plate, and a sliding groove is provided inside the sliding block.

[0010] Preferably, the end of the sliding block is connected to a mounting block, and a locking screw is connected through the interior of the mounting block.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the thermal overload relay which is easy to maintain, when the two groups of trapezoidal blocks are squeezed, can drive the guide block to move, and the spring can be compressed while the trapezoidal blocks move, when the spring is compressed to a specified degree, the two groups of trapezoidal blocks can slide into the inside of the docking block through the through groove, the position of the locking screw can be adjusted according to actual conditions, so that the installation position of the thermal overload relay can be installed and fixed according to different conditions, and by adjusting the installation position of the locking screw, the installation position of the thermal overload relay is diversified, thereby improving its practicality.

[0012] 1. Thermal overload relays are usually used for motor overload protection. Thermal overload relays are relatively simple and convenient to use, but they are inconvenient to repair. When the two sets of trapezoidal blocks are squeezed, the guide blocks can be driven to move, and the springs can be compressed while the trapezoidal blocks move. When the springs are compressed to a specified degree, the two sets of trapezoidal blocks can slide into the docking blocks through the through slots. When the plug-in blocks move, the flexible plastic card blocks can be squeezed. At this time, the flexible plastic card blocks are bent by force. When the flexible plastic card blocks are bent to a specified degree, the plug-in blocks can slide out from the inside of the connecting blocks. At this time, the upper shell can be removed from the lower shell for repair work. This simple and convenient method allows the thermal overload relay to be quickly repaired without the use of tools.

[0013] 2. The installation position of the thermal overload relay is usually fixed, which makes it difficult to adjust the installation position of the thermal overload relay according to actual conditions, and its practicality is poor. When the mounting block moves, it can drive the slider and the locking screw to move. When the slider slides to the specified position, the knob can be rotated, and the end of the knob can squeeze and fix the slider through the slide groove. At this time, the mounting block can be installed in the specified position, and the locking screw can be fixed with a tool. The position of the locking screw can be adjusted according to actual conditions, so that the installation position of the thermal overload relay can be installed and fixed according to different situations. By adjusting the installation position of the locking screw, the installation position of the thermal overload relay is diversified, thereby improving its practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 It is a left-side structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the cutaway structure of the docking block of the utility model from the left side;

[0017] Figure 4 It is a schematic diagram of the top view and cutaway structure of the mounting block of the utility model;

[0018] Figure 5 It is a three-dimensional structural schematic diagram of the plug-in block of the utility model.

[0019] In the figure: 1. upper shell; 2. copper pins; 3. lower shell; 4. reset button; 5. wiring port; 6. switch contact; 7. plug-in block; 8. connecting block; 9. flexible plastic card block; 10. fixing block; 11. through slot; 12. docking block; 13. spring; 14. trapezoidal block; 15. guide block; 16. connecting plate; 17. knob; 18. slider; 19. slide slot; 20. mounting block; 21. locking screw. 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 and Figure 5It can be seen that the utility model provides a technical solution: a thermal overload relay that is easy to repair, comprising: an upper shell 1, a copper pin 2, a lower shell 3, a reset button 4, a wiring port 5, a switch contact 6 and a plug-in block 7, the top of the upper shell 1 is connected with a copper pin 2, the bottom of the upper shell 1 is provided with a lower shell 3, the front of the lower shell 3 is equipped with a reset button 4, the front of the lower shell 3 away from the reset button 4 is equipped with a wiring port 5, the front of the lower shell 3 close to the wiring port 5 is equipped with a switch contact 6, and the plug-in block 7 is fused to both sides of the upper shell 1, and both sides of the lower shell 3 are fused with connection Block 8, a flexible plastic card block 9 is welded inside the connecting block 8, fixed blocks 10 are welded on both sides of the lower shell 3, a through groove 11 is opened inside the fixed block 10, docking blocks 12 are welded on both sides of the upper shell 1 close to the fixed block 10, a spring 13 is connected inside the docking block 12, one end of the spring 13 is connected to a trapezoidal block 14, and the top of the trapezoidal block 14 is connected to a guide block 15, a snap-fit ​​structure is formed between the plug-in block 7 and the flexible plastic card block 9, a sliding structure is formed between the plug-in block 7 and the connecting block 8, and two groups of docking blocks 12 are symmetrically arranged about the center of the upper shell 1.

[0022] In specific implementation, the thermal overload relay is usually used for motor overload protection. The thermal overload relay is relatively simple and convenient to use, but it is inconvenient during the maintenance process. For this reason, the two groups of trapezoidal blocks 14 inside the two groups of docking blocks 12 can be pressed toward each other at the same time. When the two groups of trapezoidal blocks 14 are squeezed, the guide block 15 can be driven to move, and the spring 13 can be compressed while the trapezoidal block 14 moves. When the spring 13 is compressed to a specified degree, the two groups of trapezoidal blocks 14 can slide into the docking block 12 through the through groove 11. At this time, the upper shell 1 can be pulled upward. When the upper shell 1 moves, it can drive the plug-in block 7 to move. When the plug-in block 7 moves, it can squeeze the flexible plastic card block 9. At this time, the flexible plastic card block 9 is bent by force. When the flexible plastic card block 9 is bent to a specified degree, the plug-in block 7 can slide out from the inside of the connecting block 8. At this time, the upper shell 1 can be removed from the lower shell 3 to carry out maintenance work.

[0023] See also Figure 1 , Figure 2 , Figure 3 and Figure 5 It can be seen that the thermal overload relay can be quickly repaired through this simple and convenient method without using tools.

[0024] See also Figure 1 , Figure 2 and Figure 4It can be seen that a connecting plate 16 is installed on the back of the lower shell 3, and the internal thread of the connecting plate 16 is connected to a knob 17, and the interior of the connecting plate 16 is movably connected to a slider 18, and a slide groove 19 is provided inside the slider 18. The end of the slider 18 is connected to a mounting block 20, and a locking screw 21 is connected through the interior of the mounting block 20, so that a sliding structure is formed between the slider 18 and the connecting plate 16.

[0025] During specific implementation, the installation position of the thermal overload relay is usually fixed, which makes it difficult to adjust the installation position of the thermal overload relay according to actual conditions, and its practicality is poor. For this reason, the installation block 20 can be pulled. When the installation block 20 moves, the slider 18 and the locking screw 21 can be driven to move. When the slider 18 moves, it can slide through the connecting plate 16. When the slider 18 slides to the specified position, the knob 17 can be rotated. When the knob 17 is rotated, it can slide through the connecting plate 16, and the end of the knob 17 can squeeze and fix the slider 18 through the slide groove 19. At this time, the installation block 20 can be installed in the specified position, and the locking screw 21 can be fixed with a tool. The position of the locking screw 21 can be adjusted according to actual conditions, so that the installation position of the thermal overload relay can be installed and fixed according to different situations.

[0026] See also Figure 1 , Figure 2 and Figure 4 It can be seen that by adjusting the installation position of the locking screw 21, the installation position of the thermal overload relay is diversified, thereby improving its practicality.

[0027] To sum up, when using the thermal overload relay that is easy to maintain, the thermal element of the thermal overload relay is connected to the motor circuit directly or through a current transformer. When the motor is overloaded, the bimetallic strip is heated to the operating temperature, causing the relay to operate and disconnect the power circuit of the motor to protect the motor from damage due to overload. The thermal overload relay is a prior art and will not be described in detail here. When the flexible plastic card block 9 is bent to a specified degree, the plug-in block 7 can slide out from the inside of the connecting block 8. At this time, the upper shell 1 can be removed from the lower shell 3 to perform maintenance operations. Through this simple and convenient method, the thermal overload relay can be quickly repaired without the use of tools. The position of the locking screw 21 can be adjusted according to actual conditions, so that the installation position of the thermal overload relay can be installed and fixed according to different conditions. By adjusting the installation position of the locking screw 21, the installation position of the thermal overload relay is diversified, thereby improving its practicality. The content not described in detail in this description belongs to the prior art known to professional and technical personnel in this field.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A thermal overload relay that is easy to maintain, comprising: An upper housing (1), a copper pin (2), a lower housing (3), a reset button (4), a wiring port (5), a switch contact (6) and a plug-in block (7), characterized in that: The top of the upper shell (1) is connected to a copper pin (2), the bottom of the upper shell (1) is provided with a lower shell (3), the front of the lower shell (3) is provided with a reset button (4), the front of the lower shell (3) away from the reset button (4) is provided with a wiring port (5), and the front of the lower shell (3) close to the wiring port (5) is provided with a switch contact (6); A plug-in block (7) is welded to both sides of the upper shell (1); both sides of the lower shell (3) are welded with a connecting block (8); the interior of the connecting block (8) is welded with a flexible plastic card block (9); both sides of the lower shell (3) are welded with a fixing block (10); the interior of the fixing block (10) is penetrated by a through groove (11); both sides of the upper shell (1) close to the fixing block (10) are welded with a docking block (12); the interior of the docking block (12) is connected with a spring (13); one end of the spring (13) is connected with a trapezoidal block (14); the top of the trapezoidal block (14) is connected with a guide block (15).

2. A thermal overload relay that is easy to maintain according to claim 1, characterized in that: A snap-fit ​​structure is formed between the plug-in block (7) and the flexible plastic card block (9), and a sliding structure is formed between the plug-in block (7) and the connecting block (8).

3. A thermal overload relay that is easy to maintain according to claim 1, characterized in that: The docking blocks (12) are arranged in two groups symmetrically about the center of the upper shell (1).

4. The thermal overload relay for easy maintenance according to claim 1, characterized in that: A connecting plate (16) is installed on the back of the lower shell (3), and a knob (17) is connected to the inner thread of the connecting plate (16).

5. The thermal overload relay convenient for maintenance according to claim 4, characterized in that: A sliding block (18) is movably connected inside the connecting plate (16), and a sliding groove (19) is provided inside the sliding block (18).

6. A thermal overload relay that is easy to maintain according to claim 5, characterized in that: The end of the sliding block (18) is connected to a mounting block (20), and a locking screw (21) is connected through the interior of the mounting block (20).

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