A misconnection prevention terminal strip structure of a frequency conversion cabinet

Abstract

The utility model discloses a kind of anti-misconnection terminal block structures of frequency conversion cabinet, it is related to electrical equipment technical field, including terminal block base, anti-misconnection terminal block, coding identification component, locking mechanism and wiring verification module;Terminal block base is provided with several terminal installation grooves along length direction, and the inner wall of each installation groove is equipped with positioning boss;Anti-misconnection terminal block is detachably installed in terminal installation groove, including wiring terminal main body and the anti-miscode structure of being set to the outer side of wiring terminal main body, anti-miscode structure is positioned with positioning boss cooperation;Coding identification component includes the color mark area and coding recess groove being set to terminal block base, and the coding plug-in unit being cooperatively installed in coding recess groove;Locking mechanism is set between anti-misconnection terminal block and terminal block base;Wiring verification module is integrated in terminal block base interior.The utility model is positioned by multiple anti-misdesign, and terminal misinstallation, misconnection is completely eliminated from physical structure, and human wiring error rate is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, specifically to a terminal block structure for preventing miswiring in a frequency converter cabinet. Background Technology

[0002] In industrial sites such as oil and gas fields, mines, and chemical plants, frequency converter cabinets are the core control equipment for motor drives, and their wiring operations are frequent and crucial.

[0003] Currently, frequency converter cabinets generally use universal terminal blocks. Adjacent terminals have similar appearances and uniform specifications. Wiring personnel need to refer to the drawings one by one to connect the wires. In complex multi-circuit frequency converter cabinets, it is very easy to make mistakes in wiring positions or reverse the phase sequence (such as confusing the input side R, S, T with the output side U, V, W), leading to equipment damage or even safety accidents. At the same time, most existing terminal blocks are of a universal structure, with terminals of different voltage levels and different signal types mixed in the same row. They lack physical isolation and anti-misinsertion structures, and traditional paper labels or printed markings are easily worn off in harsh environments, making later maintenance difficult. In addition, after the wiring is completed, each wire must be checked manually with a multimeter. There is no intuitive means to judge the correctness of the wiring, resulting in low inspection efficiency.

[0004] Therefore, it is necessary to design a variable frequency cabinet anti-miswiring terminal block structure that can effectively prevent wiring errors and improve wiring efficiency and reliability. Utility Model Content

[0005] The purpose of this utility model is to provide a terminal block structure for preventing incorrect wiring in a frequency converter cabinet. Through a structured anti-miswiring design, the wiring error rate is reduced, and construction efficiency and equipment safety are improved.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A mis-wiring terminal block structure for a frequency converter cabinet includes a terminal block base, a mis-wiring terminal block, an encoding and marking component, a locking mechanism, and a wiring verification module. The terminal block base has several terminal mounting slots along its length, and each slot has a positioning boss on its inner wall. The mis-wiring terminal block is detachably installed in the terminal mounting slot and includes a terminal block body and a mis-wiring coding structure located on the outside of the terminal block body. The mis-wiring coding structure cooperates with the positioning boss to achieve positioning. The encoding and marking component includes a color mark area and a coding groove on the terminal block base, and a coding plug installed in the coding groove. The locking mechanism is located between the mis-wiring terminal block and the terminal block base to lock the mis-wiring terminal block in the correct position. The wiring verification module is integrated inside the terminal block base and is used to verify the continuity of the circuit after wiring is completed.

[0008] Preferably, the anti-miscoding structure includes an asymmetrical positioning slot at the bottom of the terminal block body and an anti-misalignment protrusion on the side of the terminal block body; the asymmetrical positioning slot matches the shape of the positioning boss on the terminal block base, and the positions and / or shapes of the asymmetrical positioning slots corresponding to different types of terminals are different; the anti-misalignment protrusion matches the corresponding groove of the adjacent terminal block to prevent the terminals from being installed in a misaligned manner.

[0009] It is worth noting that the unique mating relationship between the asymmetrical positioning slot and the positioning boss ensures that the input terminal, output terminal, and control signal terminal each have a unique bottom profile and cannot be interchanged. The anti-misalignment protrusion further restricts the installation direction of the terminal from the side. When the terminal is installed in the wrong direction, the anti-misalignment protrusion cannot be inserted into the adjacent groove. This achieves double anti-misalignment from a physical structure perspective and fundamentally eliminates the possibility of incorrect terminal installation.

[0010] Preferably, the coding plug is a detachable plug structure, and the surface of the coding plug is provided with raised coding marks; after the coding plug is inserted into the coding groove, its upper surface is flush with or higher than the upper surface of the terminal block base.

[0011] It is worth noting that the coding plug adopts an independent and detachable plug structure. On the one hand, it is convenient to flexibly replace the plug with different markings according to the actual wiring requirements. On the other hand, the raised coding marking is more wear-resistant and durable than traditional flat printed markings. It can still maintain good visibility in the dusty and oily environment of the industrial site. At the same time, the coding marking and the color mark area form a dual recognition of visual and tactile senses, which further reduces the probability of incorrect wiring.

[0012] Preferably, the locking mechanism includes an elastic buckle disposed on the side of the anti-misoperation terminal block and a slot disposed at the corresponding position on the terminal block base; the elastic buckle automatically engages with the slot after the anti-misoperation terminal block is correctly installed in place, forming a locking engagement.

[0013] It is worth noting that the elastic snap-fit ​​structure enables tool-free, quick installation and removal of the anti-misoperation terminal block. The snap-fit ​​automatically locks when the terminal block is pushed into place, requiring no additional operation. Removal is simple; just press the snap-fit ​​to remove the terminal block, greatly facilitating later maintenance and replacement. Simultaneously, the snap-fit ​​creates a reliable mechanical lock, effectively preventing the terminal block from loosening under long-term vibration conditions, making it particularly suitable for environments with high vibration, such as oil and gas fields.

[0014] Preferably, the wiring verification module includes a continuity detection circuit embedded inside the terminal block base, a status indicator light on the surface of the terminal block base, and a verification interface at the end of the terminal block base; the test points of the continuity detection circuit are respectively connected to the conductive plates of each terminal mounting slot; the status indicator light is connected to the continuity detection circuit to display the wiring status; and the verification interface is used to connect to external verification equipment.

[0015] It is worth noting that by directly integrating the wiring verification module into the terminal block base, the wiring can be completed without the need for external instruments such as multimeters to measure each terminal individually. The correctness of the wiring can be intuitively judged by the status indicator lights, which significantly improves the efficiency of wiring inspection. This is especially suitable for complex wiring scenarios with multiple circuits and multiple terminals in frequency converter cabinets.

[0016] Preferably, the terminal block base is also provided with partitions, which divide the terminal block into an input area, an output area and a control signal area, with different spacing between the terminal mounting slots in each area.

[0017] It is worth noting that by physically isolating different functional areas with partitions and using differentiated terminal spacing in each area, wiring personnel can clearly distinguish between different functional areas both visually and tactilely. Even novices unfamiliar with the equipment can accurately identify the wiring positions, effectively avoiding the common mistake of reversing the input and output sides.

[0018] Preferably, the wiring holes of the anti-misoperation terminal block have different diameters, with the wiring hole diameter of the input side terminal being larger than that of the output side terminal, and the wiring hole diameter of the control signal side terminal being the smallest.

[0019] It is worth noting that the differentiated hole diameter design of the terminal wiring holes in different functional areas forms a natural physical matching constraint with the cable diameter. Thick cables cannot be inserted into small-diameter control signal terminals, and thin cables cannot be locked after being inserted into large-diameter input terminals. This prevents misoperation from the cable selection stage and further improves the safety of wiring.

[0020] Preferably, the terminal block base is also provided with a guide groove and a wire number label slot; the guide groove is opened along the length of the terminal block base to guide the cable routing; the wire number label slot is set on the side of each terminal mounting slot to install replaceable wire number labels.

[0021] It is worth noting that the guide groove makes the cable routing more orderly and avoids the risk of short circuits caused by cable crossing and mess; the wire number label slot adopts a replaceable structure. When the circuit number changes, you only need to take out the old label and insert the new label. Compared with the traditional adhesive label, there is no need to remove residual glue and re-adhere, which makes the replacement efficient and will not leave residual glue pollution on the base surface.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] 1. This utility model, through multiple anti-misoperation designs including asymmetrical positioning slots, anti-misoperation protrusions, color mark areas, and coding plugs, eliminates terminal misinstallation and misconnection from a physical structure perspective, significantly reducing the human wiring error rate;

[0024] 2. This utility model physically isolates the input area, output area and control signal area through partitions. With the different terminal spacing and different wiring hole diameters in each area, even wiring personnel who are not familiar with the equipment can accurately identify the wiring position, effectively avoiding reversed phase sequence.

[0025] 3. This utility model has a built-in wiring verification module. After the wiring is completed, the status indicator light can be used to intuitively judge whether the wiring is correct, without the need to use a multimeter to measure each one, which significantly improves the inspection efficiency.

[0026] 4. The coding plug-in of this utility model uses laser-etched metal nameplates or wear-resistant plastic nameplates, which are not easy to wear off in harsh environments and have good long-term reliability; the line number label slot allows the line number label to be quickly replaced, which is convenient for later maintenance.

[0027] 5. This utility model uses an elastic buckle locking mechanism to ensure that the terminal block will not loosen under vibration, making it particularly suitable for occasions with frequent vibration, such as oil and gas fields. Attached Figure Description

[0028] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0029] Figure 2 The diagram shown is a three-dimensional structural schematic of the guide groove of this utility model;

[0030] Figure 3 The diagram shown is a three-dimensional structural schematic of the anti-misoperation terminal block of this utility model;

[0031] Figure 4 The diagram shown is a three-dimensional structural schematic of the terminal mounting groove of this utility model.

[0032] Figure 5 The diagram shown is a three-dimensional structural schematic of the elastic buckle of this utility model;

[0033] Figure 6 The diagram shown is a three-dimensional structural schematic of the wiring verification module of this utility model.

[0034] Reference numerals in the attached diagram: 1. Terminal block base; 11. Terminal mounting groove; 12. Positioning boss; 13. Color mark area; 14. Encoding groove; 15. Partition plate; 16. Guide groove; 17. Wire number label slot; 2. Anti-misoperation terminal block; 21. Wiring terminal body; 22. Anti-misoperation coding structure; 221. Asymmetrical positioning slot; 222. Anti-foolproof protrusion; 23. Wiring hole; 24. Elastic buckle; 3. Encoding plug-in; 31. Encoding mark; 4. Wiring verification module; 41. Continuity detection circuit; 42. Status indicator light; 43. Verification interface. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] To address the problems of high risk of wiring errors, difficulty in phase sequence identification, lack of error-proofing design, easy detachment of markings, and low inspection efficiency in existing technologies, the following technical solution is proposed. Please refer to [link / reference needed]. Figures 1 to 6 .

[0037] Example 1

[0038] like Figures 1 to 6 As shown, a terminal block structure for preventing incorrect wiring in a frequency converter cabinet includes a terminal block base 1, a terminal block 2 for preventing incorrect wiring, an encoding and marking component, a locking mechanism, and a wiring verification module 4.

[0039] In this embodiment, specifically, the terminal block base 1 is integrally injection molded from PA66 engineering plastic with a flame retardant rating of V0. Multiple terminal mounting slots 11 are provided along the length direction, and each terminal mounting slot 11 has a positioning boss 12 on its inner wall. The positioning boss 12 is an asymmetrical T-shaped boss structure. The surface of the terminal block base 1 is provided with an anti-slip texture.

[0040] In this embodiment, specifically, the anti-misoperation terminal block 2 is detachably installed in the terminal mounting slot 11. The anti-misoperation terminal block 2 includes a terminal body 21 and an anti-misoperation coding structure 22 disposed on the outside of the terminal body 21. The anti-misoperation coding structure 22 includes an asymmetrical positioning slot 221 disposed at the bottom of the terminal body 21 and an anti-misoperation protrusion 222 disposed on the side of the terminal body 21. The asymmetrical positioning slot 221 is shaped to match the positioning protrusion 12 on the terminal block base 1, and the position and / or shape of the asymmetrical positioning slot 221 corresponding to different types of terminals (input terminals, output terminals, control signal terminals) are different. The anti-misoperation protrusion 222 is located on the left or right side of the terminal body 21 and is matched with the corresponding groove of the adjacent terminal block.

[0041] In this embodiment, specifically, the coding and marking component includes a color mark area 13, a coding groove 14, and a coding plug 3. The color mark area 13 is arranged along the length of the terminal block base 1 and is divided into a yellow area (input area), a green area (output area), and a blue area (control signal area), with each color area corresponding to a terminal type. The coding groove 14 is formed on the upper surface of the terminal block base 1, located beside each terminal mounting slot 11. The coding plug 3 is a detachable plug structure made of stainless steel, with raised coding markings 31 laser-etched on its surface, such as "R", "S", "T", "U", "V", "W", "PE" or "DI", "DO", "AI", "AO", etc. After the coding plug 3 is inserted into the coding groove 14, its upper surface protrudes 0.5mm above the upper surface of the terminal block base 1.

[0042] In this embodiment, the locking mechanism specifically includes an elastic buckle 24 disposed on the side of the anti-misoperation terminal block 2 and a corresponding slot disposed on the terminal block base 1. The elastic buckle 24 is made of spring steel sheet and automatically snaps into the slot after the anti-misoperation terminal block 2 is correctly installed, forming a reliable lock. For disassembly, the elastic buckle 24 can be unlocked and removed by pressing it with a flathead screwdriver.

[0043] In this embodiment, specifically, the wiring verification module 4 is integrated inside the terminal block base 1. The wiring verification module 4 includes a continuity detection circuit 41 embedded inside the terminal block base 1, a status indicator light 42 disposed on the surface of the terminal block base 1, and a verification interface 43 disposed at the end of the terminal block base 1. The test points of the continuity detection circuit 41 are respectively connected to the conductive sheet of each terminal mounting slot 11. The status indicator light 42 uses LED beads, and one status indicator light 42 is provided for each terminal mounting slot 11. The verification interface 43 adopts an RJ45 interface.

[0044] In this embodiment, specifically, the terminal block base 1 is further provided with a partition plate 15, dividing the terminal block into an input area, an output area, and a control signal area. The spacing of the terminal mounting slots 11 in each area is 25mm (input area), 20mm (output area), and 15mm (control signal area), respectively. The terminal block base 1 is also provided with a guide groove 16 and a wire number label slot 17. The guide groove 16 is opened along the length direction of the terminal block base 1, with a depth of 5mm and a width of 10mm. The wire number label slot 17 is located on the side of each terminal mounting slot 11, with dimensions of 20mm × 8mm × 2mm, and is used to install replaceable wire number labels.

[0045] Example 2

[0046] Based on Embodiment 1, in this embodiment, specifically, the wiring holes 23 of the anti-miswiring terminal block 2 are provided with different diameters. The wiring hole 23 of the input area terminal has a diameter of 6mm, suitable for 10mm² cables; the wiring hole 23 of the output area terminal has a diameter of 4mm, suitable for 4mm² cables; and the wiring hole 23 of the control signal area terminal has a diameter of 2mm, suitable for 1mm² cables. The different hole diameter design further reduces the risk of wiring errors.

[0047] Example 3

[0048] Based on Embodiment 1, in this embodiment, specifically, the coding plug-in 3 is made of wear-resistant plastic signage, which is formed by injection molding. The raised coding mark 31 on the surface is integrally molded by mold, without the need for laser etching, and is suitable for cost-sensitive mass production application scenarios.

[0049] Working principle: During use, first select the appropriate type of anti-misoperation terminal block 2 according to the wiring requirements of the frequency converter cabinet. The input terminal uses the anti-misoperation terminal block 2 with the bottom asymmetrical positioning slot 221 matching the positioning boss 12 in the input area. The output terminal uses a different positioning slot, and the control signal terminal also uses a unique positioning slot. Because the asymmetrical positioning slots 221 of different types of terminals are set in different positions and / or shapes, the operator cannot install the input terminal into the terminal mounting slot 11 in the output area, nor can the control signal terminal be installed into the input area, thus physically preventing incorrect terminal installation.

[0050] Push the selected anti-misoperation terminal block 2 into the corresponding terminal mounting slot 11. When it is pushed into place, the elastic buckle 24 automatically engages with the slot to form a lock. If the anti-misoperation terminal block 2 is installed in the wrong direction, the anti-misoperation protrusion 222 cannot match the corresponding groove of the adjacent terminal block, and the anti-misoperation terminal block 2 cannot be fully pushed into place. Remind the operator to adjust the direction.

[0051] During wiring, operators double-check the wiring position using the colors in color-coded area 13 (yellow for input, green for output, and blue for control signal) and the raised coding markings 31 on the coding plug-in 3. After stripping the insulation from the cable, insert it into the corresponding wiring hole 23 and tighten the wiring screw with a screwdriver to complete the wiring. Because the diameter of the wiring holes 23 varies in different areas, thicker cables cannot be inserted into the smaller holes of the control signal terminals, and thinner cables cannot be locked in place after being inserted into the larger holes of the input terminals, forming a third layer of error prevention.

[0052] After all wiring is completed, connect the external verification device to the verification interface 43. The continuity detection circuit 41 automatically detects the wiring status of each terminal. If a certain wiring is correct and the circuit is conducting well, the corresponding status indicator 42 will be solid green. If the wiring is incorrect, missing, or open, the status indicator 42 will flash red. The operator can quickly locate the problematic wiring based on the status indicator 42. After the inspection is completed, disconnect the verification device.

[0053] When it is necessary to replace or maintain the anti-misoperation terminal block 2, use a flathead screwdriver to press the elastic clip 24 to remove the anti-misoperation terminal block 2 from the terminal mounting slot 11. When the wire number is changed, simply pull out the old label from the wire number label slot 17 and insert the new label. There is no need to remove residual adhesive.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A terminal block structure for preventing incorrect wiring in a frequency converter cabinet, characterized in that, include: The terminal block base (1) has several terminal mounting slots (11) along its length, and each terminal mounting slot (11) has a positioning boss (12) on its inner wall. The anti-misoperation terminal block (2) is detachably installed in the terminal mounting slot (11), including the wiring terminal body (21) and the anti-misoperation coding structure (22) set on the outside of the wiring terminal body (21). The anti-misoperation coding structure (22) cooperates with the positioning boss (12) to achieve positioning. The coding and marking component includes a color mark area (13) and a coding groove (14) disposed on the terminal block base (1), and a coding plug (3) installed in the coding groove (14). A locking mechanism is provided between the anti-misoperation terminal block (2) and the terminal block base (1) to lock the anti-misoperation terminal block (2) in the correct position; The wiring verification module (4) is integrated inside the terminal block base (1) and is used to verify the continuity of the circuit after the wiring is completed.

2. The anti-miswiring terminal block structure for the frequency converter cabinet according to claim 1, characterized in that, The anti-miscoding structure (22) includes an asymmetrical positioning slot (221) provided at the bottom of the terminal block body (21) and an anti-mistake protrusion (222) provided on the side of the terminal block body (21). The asymmetric positioning slot (221) matches the positioning boss (12) on the terminal block base (1) in shape, and the positions and / or shapes of the asymmetric positioning slots (221) corresponding to different types of terminals are set differently; The anti-misalignment protrusion (222) engages with the corresponding groove of the adjacent terminal block to prevent misalignment of the terminals.

3. The anti-miswiring terminal block structure of the frequency converter cabinet according to claim 1, characterized in that, The coding plug (3) is a detachable plug structure. The surface of the coding plug (3) is provided with raised coding marks (31). After the coding plug (3) is inserted into the coding groove (14), its upper surface is flush with or higher than the upper surface of the terminal block base (1).

4. The anti-miswiring terminal block structure of the frequency converter cabinet according to claim 1, characterized in that, The locking mechanism includes an elastic buckle (24) set on the side of the anti-misoperation terminal block (2) and a slot set at the corresponding position of the terminal block base (1); the elastic buckle (24) automatically snaps into the slot after the anti-misoperation terminal block (2) is correctly installed in place, forming a locking engagement.

5. The anti-miswiring terminal block structure of the frequency converter cabinet according to claim 1, characterized in that, The wiring verification module (4) includes a continuity detection circuit (41) embedded inside the terminal block base (1), a status indicator light (42) set on the surface of the terminal block base (1), and a verification interface (43) set at the end of the terminal block base (1). The test points of the continuity detection circuit (41) are connected to the conductive sheets of each terminal mounting slot (11); The status indicator (42) is connected to the continuity detection circuit (41) to display the wiring status; The verification interface (43) is used to connect to external verification devices.

6. The anti-miswiring terminal block structure of the frequency converter cabinet according to claim 1, characterized in that, The terminal block base (1) is also provided with partitions (15), which divide the terminal block into an input area, an output area and a control signal area. The spacing of the terminal mounting slots (11) in each area is different.

7. The anti-miswiring terminal block structure for the frequency converter cabinet according to claim 1, characterized in that, The wiring holes (23) of the anti-misoperation terminal block (2) are provided with different diameters. The diameter of the wiring hole (23) of the input side terminal is larger than that of the wiring hole (23) of the output side terminal, and the diameter of the wiring hole (23) of the control signal side terminal is the smallest.

8. The anti-miswiring terminal block structure of the frequency converter cabinet according to claim 1, characterized in that, The terminal block base (1) is also provided with a guide groove (16) and a wire number label slot (17); the guide groove (16) is opened along the length of the terminal block base (1) to guide the cable routing; the wire number label slot (17) is set on the side of each terminal mounting slot (11) to install replaceable wire number labels.

9. The anti-miswiring terminal block structure of the frequency converter cabinet according to claim 1, characterized in that, The terminal block base (1) is made of flame-retardant engineering plastic material and has anti-slip texture on its surface; the coding plug (3) is made of laser-etched metal nameplate or wear-resistant plastic nameplate.

10. The anti-miswiring terminal block structure of the frequency converter cabinet according to claim 5, characterized in that, Each terminal mounting slot (11) is equipped with a corresponding status indicator light (42); the verification interface (43) is an RJ45 interface.

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