A trip structure in a measurement

Abstract

The utility model discloses a tripping device structure in measurement relates to tripping device technical field, including horizontal cylinder, both ends of horizontal cylinder are installed screw pipe through screw thread, one end of screw pipe is installed annular plug, the other end of screw pipe is installed base, and the middle part of base side end face inserts and is rotatably installed with rotating seat, and the inner curved surface of rotating seat inserts and is installed with sleeve pad, and the position of base side end face corresponds screw pipe and is installed with guide seat, the utility model discloses can realize the dynamic adjustment and correction of base interval, cooperate with sleeve pad, guide seat and ring pad, can form double pressure interlocking mechanism, not only can directly install the fixed installation of tripping device inner package on the external switch pivot, effectively solve the problem that tripping device outer package is on the high friction of middle cover, make the reaction of tripping device more sensitive and efficient, and can cooperate with sleeve pad and ring pad, make tripping device and circuit breaker's switch mounting seat and switch pivot more fit.

Description

Technical Field

[0001] This utility model relates to the field of trip unit technology, specifically a trip unit structure for measurement. Background Technology

[0002] The trip unit is a core protection component installed in electrical switching equipment such as circuit breakers and load switches. By monitoring parameters such as current, voltage and temperature in the circuit, when the circuit has faults such as overload, short circuit, undervoltage, or overvoltage, or when emergency disconnection is required, it can trigger the operating mechanism of the switch to act, so that the contacts can quickly separate and disconnect the circuit, thereby protecting the electrical equipment, lines and personnel safety. It is a key component for electrical system safety protection. However, the current trip unit structure is directly mounted on the middle cover and is usually fixed with bolts. This not only results in high friction during use, making it prone to jamming, but also has poor fit with the external switch. It is prone to loosening and misalignment due to vibration during use, which cannot meet the stability requirements of the external switch shaft transmission and easily leads to ineffective transmission, thus compromising the stability of the protection operation. Utility Model Content

[0003] This utility model provides a trip unit structure for measurement, which can effectively solve the problems mentioned in the background art. The current trip unit structure is directly fixed to the middle cover and usually fixed by bolts. Not only is the friction high during use, which is prone to jamming, but its fit with the external switch is also poor. During use, it is easy to loosen and misalign due to vibration, which cannot meet the requirements of the external switch shaft transmission stability and easily produces ineffective transmission, thus failing to guarantee the stability of the protection operation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a trip unit structure for measurement, comprising a horizontal cylinder, both ends of which are threaded with a spiral tube, one end of which is fitted with an annular plug, and the other end of which is fitted with a base, a rotating seat is rotatably mounted in the middle of the side end face of the base, a sleeve is embedded in the inner curved surface of the rotating seat, and a guide seat is mounted on the side end face of the base corresponding to the position of the spiral tube; A connecting shaft is installed in the middle of the other end face of the rotary seat. A dial wheel and a chuck are installed on the outer curved surface of one of the connecting shafts. A lever is installed on the edge of the end face of the dial wheel. A guide rod is slidably installed on the end face of the base corresponding to the lever position. A locking block is slidably sleeved on the outside of the guide rod. A tension spring is installed on the end face of the locking block. A locking head is slidably installed on one side of the base corresponding to the chuck position.

[0005] Preferably, the annular plug is located inside the horizontal cylinder and fits into the horizontal cylinder. The horizontal cylinder is filled with insulating oil at the position between the two annular plugs. The space inside the horizontal cylinder between the two annular plugs is connected to the inner cavity of the rotating seat through a spiral tube and a guide seat, and the threads on the outer walls of the two spiral tubes are in opposite directions.

[0006] Preferably, a ring pad is embedded in the side end face of the base at the position outside the rotating seat, and both the ring pad and the sleeve pad are elastic airbag structures, and the inner cavities of the ring pad and the sleeve pad are in communication with the inner cavity of the rotating seat.

[0007] Preferably, the tension spring is slidably sleeved on the outside of the guide rod, the locking block is connected to the base through the tension spring, and the dial wheel is locked to the locking block through the dial rod.

[0008] Preferably, a slide cylinder is installed on the side end of the base corresponding to the chuck position, a coil is wound around the outside of the slide cylinder, a slide rod is slidably installed at the end of the slide cylinder, and one end of the slide rod is connected to the chuck head, and a permanent magnet block is slidably installed inside the slide cylinder; A push rod is installed at the bottom of the side end face of the permanent magnet block, and a screw cylinder is installed at the other end of the slide rod by thread. A spring is sleeved on the outside of the screw cylinder. A cam is installed at the other end of the connecting shaft, and a signal switch is installed at the corresponding position of the cam on the side end face of the base.

[0009] Preferably, the coil is connected in series with the external main circuit, the slide rod is a semi-threaded screw, the screw cylinder is slidably connected to the slide cylinder, and the other end of the slide cylinder is connected to the screw cylinder through a spring, the chuck is engaged with the chuck head, the signal switch input terminal is connected to the external power supply, and the signal switch output terminal is connected to the input terminal of the external signal receiver.

[0010] Compared with the prior art, the advantages of this utility model are: the structure of this utility model is scientific and reasonable, and it is safe and convenient to use; 1. Equipped with a horizontal cylinder, the main frame of the trip unit can be formed by the cooperation of the horizontal cylinder, solenoid, annular plug, base, and rotating seat. It can realize dynamic adjustment and correction of the base spacing. In conjunction with the sleeve gasket, guide seat, and annular gasket, it can form a dual pressure interlocking mechanism. It can not only directly fix the trip unit internally on the external switch shaft, effectively solving the problem of high friction when the trip unit is externally mounted on the middle cover, making the trip unit more sensitive and efficient, but also cooperate with the sleeve gasket and annular gasket to make the trip unit fit better with the circuit breaker switch mounting base and switch shaft.

[0011] 2. Replacing traditional bolt connections with hydraulic clamping not only makes installation more convenient but also ensures a more balanced and stable connection stress between the trip unit and the external switch. This effectively absorbs and mitigates vibrations during the use of the external circuit breaker, making the trip unit operate more smoothly and efficiently. Through the cooperation of the coupling shaft, dial wheel, lever, guide rod, locking block, tension spring, chuck, and locking head, a main limiting mechanism can be formed, providing sufficient and stable limiting driving force for the trip unit to achieve precise disconnection of the external switch.

[0012] 3. Equipped with a sliding cylinder, the sliding cylinder, coil, sliding rod, permanent magnet block, and push rod work together to form a dual-channel execution mechanism, providing dual protection for the trip unit. This integrates overload and short-circuit protection without increasing the unit's size, simultaneously meeting the dual overload and short-circuit protection requirements of external circuit breakers. Furthermore, the limit adjustment functions of the screw, spring, cam, and signal switch allow for flexible control of the trip unit's critical operating point. This flexibly meets the varying overload and short-circuit protection parameters required by different applications, effectively expanding the trip unit's effective range and enhancing its operational flexibility. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0014] In the attached diagram: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the base mounting structure of this utility model; Figure 3 This is a schematic diagram of the chuck mounting structure of this utility model; Figure 4 This is a schematic diagram of the guide rod installation structure of this utility model; The following are the labels in the diagram: 1. Horizontal cylinder; 2. Screw tube; 3. Ring plug; 4. Base; 5. Rotary seat; 6. Sleeve washer; 7. Guide seat; 8. Coupling shaft; 9. Dial wheel; 10. Dial lever; 11. Guide rod; 12. Locking block; 13. Tension spring; 14. Chuck; 15. Lock head; 16. Slide cylinder; 17. Coil; 18. Slide rod; 19. Permanent magnet; 20. Push rod; 21. Screw cylinder; 22. Spring; 23. Ring washer; 24. Cam; 25. Signal switch. Detailed Implementation

[0015] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0016] Example: Figure 1-4 As shown, this utility model provides a technical solution, a tripping device structure for measurement, including a horizontal cylinder 1, with threaded tubes 2 installed at both ends of the horizontal cylinder 1, an annular plug 3 installed at one end of the threaded tube 2, and a base 4 installed at the other end of the threaded tube 2. A rotating seat 5 is rotatably installed in the middle of the side end face of the base 4, a sleeve 6 is embedded in the inner curved surface of the rotating seat 5, and an annular pad 23 is embedded in the side end face of the base 4 at the position outside the rotating seat 5. Both the annular pad 23 and the sleeve 6 are elastic airbag structures, and the inner cavities of the annular pad 23 and the sleeve 6 are connected to the inner cavity of the rotating seat 5 to provide flexible clamping force. A guide seat 7 is installed on the side end of the base 4 at the position corresponding to the screw tube 2. The ring plug 3 is located inside the horizontal cylinder 1 and fits into the horizontal cylinder 1. The horizontal cylinder 1 is filled with insulating oil at the position between the two ring plugs 3. The space inside the horizontal cylinder 1 between the two ring plugs 3 is connected to the inner cavity of the rotating seat 5 through the screw tube 2 and the guide seat 7. The threads on the outer walls of the two screw tubes 2 are opposite to achieve quick installation and positioning. A connecting shaft 8 is installed in the middle of the other end face of the rotary seat 5. A dial wheel 9 and a chuck 14 are installed on the outer curved surface of a connecting shaft 8. A lever 10 is installed on the side end face of the dial wheel 9. A guide rod 11 is slidably installed on the side end face of the base 4 corresponding to the position of the lever 10. A locking block 12 is slidably sleeved on the outside of the guide rod 11. A tension spring 13 is installed on the side end face of the locking block 12. The tension spring 13 is slidably sleeved on the outside of the guide rod 11. The locking block 12 is connected to the base 4 through the tension spring 13. The dial wheel 9 is locked to the locking block 12 through the lever 10 to improve transmission stability. A locking head 15 is slidably installed on one side of the base 4 corresponding to the position of the chuck 14.

[0017] A slide cylinder 16 is installed on the side end of the base 4 corresponding to the position of the chuck 14. A coil 17 is wound around the outside of the slide cylinder 16. A slide rod 18 is slidably installed at the end of the slide cylinder 16, and one end of the slide rod 18 is connected to the chuck head 15. A permanent magnet block 19 is slidably installed inside the slide cylinder 16. A push rod 20 is installed on the bottom of the side end face of the permanent magnet block 19. A screw barrel 21 is installed on the other end of the slide rod 18 through a thread. A spring 22 is sleeved on the outside of the screw barrel 21. A cam 24 is installed at the end of another connecting shaft 8. A signal switch 25 is installed on the side end face of the base 4 at the position corresponding to the cam 24. The coil 17 is connected in series with the external main circuit. The slide rod 18 is a semi-threaded screw. The screw barrel 21 is slidably connected to the slide barrel 16. The other end of the slide barrel 16 is connected to the screw barrel 21 through the spring 22. The chuck 14 fits with the chuck head 15. The input end of the signal switch 25 is connected to the external power supply, and the output end of the signal switch 25 is connected to the input end of the external signal receiver to flexibly meet the requirements of overload protection and short circuit protection.

[0018] The working principle and usage process of this utility model: In actual use, the size and specifications of the trip unit are first selected according to the size of the external circuit breaker. Then, the middle cover of the external circuit breaker is opened, and the trip unit is installed on the switch of the external circuit breaker. After completing the corresponding wiring connection, it can be used in conjunction with the switch of the external circuit breaker. During the installation of the trip unit, after opening the middle cover of the external circuit breaker, the two bases 4 are fitted onto both sides of the switch of the external circuit breaker, and the position of the rotating base 5 is initially adjusted to align with the switch shaft of the external circuit breaker. The horizontal cylinder 1 is rotated, and the bases 4 on both sides are dragged closer to each other through the solenoid 2, and their positions are further adjusted so that the sleeve 6 inside the rotating base 5 is fitted onto the outside of the switch shaft of the external circuit breaker, and the end of the push rod 20 is aligned with the external bimetallic strip. During the aforementioned process, as the horizontal cylinder 1 rotates, the screw tube 2 gradually retracts into the horizontal cylinder 1. While dragging the two bases 4 closer to each other, it also pushes the two annular plugs 3 to slide inside the horizontal cylinder 1, causing them to move towards each other. Then, under the pressure of the two annular plugs 3, the insulating oil inside the horizontal cylinder 1 is forced into the screw tube 2 and enters the guide seat 7 along the screw tube 2. With the connection of the guide seat 7, the insulating oil flows into the rotating seat 5 and is simultaneously injected into the sleeve 6 and the annular gasket 23. After the ring pads 23 on the two bases 4 abut against the side wall of the mounting base of the external circuit breaker switch, the horizontal cylinder 1 continues to rotate. While further narrowing the distance between the two bases 4, more insulating oil is sent into the sleeve pad 6 and the ring pad 23, causing them to expand accordingly. As a result, the two bases 4 will provide a stable elastic clamping force to the side wall of the mounting base of the external circuit breaker switch through the ring pads 23, and the rotating seat 5 will stably hold the rotating shaft of the external circuit breaker switch through the sleeve pad 6. Then rotate the screw cylinder 21. Under the limit of the external thread of the slide rod 18, the screw cylinder 21 will move relative to the slide cylinder 16. The spring 22 will also be stretched with the displacement of the screw cylinder 21 during this process. According to the actual needs, adjust the initial stretch of the spring 22 to limit the initial pressure that the permanent magnet block 19 needs to overcome to slide. After connecting the coil 17 in series with the external main circuit, the middle cover can be reset to complete the connection and installation of the trip unit. In subsequent use, the tension of the spring 13 on the block 12 can be overcome, the external circuit breaker switch can be turned on, and the closing can be completed. Under the elastic pull of the spring 22, the chuck 15 will abut against the chuck 14. Under its limit, the rotating shaft of the external circuit breaker switch can only deflect in the positive direction, so that the external circuit breaker remains in the closed state. When the circuit is overloaded, the bimetallic strip expands due to the heat generated by the current and bends towards the side with the smaller expansion coefficient. The bimetallic strip bends and presses against the push rod 20. The push rod 20 then overcomes the tension of the spring 22 and pushes the permanent magnet block 19 away from the chuck 14. The chuck head 15 is also pulled away from the chuck 14 by the slide rod 18 and no longer restricts the external circuit breaker switch shaft. At this time, under the pull of the tension spring 13, the chuck block 12 drives the dial wheel 9 to deflect in the opposite direction through the lever 10. Then, under the transmission of the connecting shaft 8, the rotating seat 5 drives the external circuit breaker switch shaft to deflect in the opposite direction through the sleeve 6, thus disconnecting the external circuit breaker switch. When a short circuit occurs in the circuit, a strong magnetic field is generated inside the coil 17. Under the magnetic force of the magnetic field, the permanent magnet block 19 will also move away from the chuck 14. The process is the same as when the circuit is overloaded. Eventually, the external circuit breaker switch will be disconnected. In the installation process of the aforementioned trip unit, by adjusting the initial tension of the spring 22, the initial pressure that the permanent magnet block 19 needs to overcome to slide is limited, and its critical point of action can be limited to adapt to different overload and short circuit definition standards. At the same time, as the external circuit breaker switch rotates, the cam 24 will also rotate synchronously with the external circuit breaker switch shaft under the drive of the connecting shaft 8. Consequently, the cam 24 will trigger the signal switch 25, which will transmit a signal to the external signal receiver to indicate the current status of the external circuit breaker switch and the trip unit.

[0019] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A trip unit structure for measurement, comprising a horizontal cylinder (1), characterized in that: Both ends of the horizontal cylinder (1) are threaded with a helical tube (2). One end of the helical tube (2) is fitted with an annular plug (3), and the other end of the helical tube (2) is fitted with a base (4). A rotating seat (5) is rotatably mounted in the middle of the side end face of the base (4). A sleeve (6) is embedded in the inner curved surface of the rotating seat (5). A guide seat (7) is mounted on the side end face of the base (4) at the position corresponding to the helical tube (2). A connecting shaft (8) is installed in the middle of the other end face of the rotary seat (5). A dial wheel (9) and a chuck (14) are installed on the outer curved surface of one of the connecting shafts (8). A lever (10) is installed on the side end face of the dial wheel (9). A guide rod (11) is slidably installed on the side end face of the base (4) corresponding to the position of the lever (10). A locking block (12) is slidably sleeved on the outside of the guide rod (11). A tension spring (13) is installed on the side end face of the locking block (12). A locking head (15) is slidably installed on one side of the base (4) corresponding to the position of the chuck (14).

2. The trip unit structure for measurement according to claim 1, characterized in that, The annular plug (3) is located inside the horizontal cylinder (1) and fits into the horizontal cylinder (1). The horizontal cylinder (1) is filled with insulating oil at the position between the two annular plugs (3). The space inside the horizontal cylinder (1) between the two annular plugs (3) is connected to the inner cavity of the rotating seat (5) through the screw tube (2) and the guide seat (7). The threads on the outer walls of the two screw tubes (2) are in opposite directions.

3. The trip unit structure for measurement according to claim 1, characterized in that, The base (4) has a ring pad (23) embedded on its side end face at the position outside the rotating seat (5). Both the ring pad (23) and the sleeve pad (6) are elastic airbag structures. The inner cavities of the ring pad (23) and the sleeve pad (6) are connected to the inner cavity of the rotating seat (5).

4. The trip unit structure for measurement according to claim 1, characterized in that, The tension spring (13) is slidably sleeved on the outside of the guide rod (11), the locking block (12) is connected to the base (4) through the tension spring (13), and the dial wheel (9) is locked to the locking block (12) through the lever (10).

5. The trip unit structure for measurement according to claim 1, characterized in that, A slide cylinder (16) is installed on the side end of the base (4) at the position corresponding to the chuck (14). A coil (17) is wound around the outside of the slide cylinder (16). A slide rod (18) is slidably installed at the end of the slide cylinder (16), and one end of the slide rod (18) is connected to the chuck head (15). A permanent magnet block (19) is slidably installed inside the slide cylinder (16). A push rod (20) is installed at the bottom of the side end face of the permanent magnet block (19). A screw cylinder (21) is installed at the other end of the slide rod (18) by thread. A spring (22) is sleeved on the outside of the screw cylinder (21). A cam (24) is installed at the other end of the connecting shaft (8). A signal switch (25) is installed at the position corresponding to the cam (24) on the side end face of the base (4).

6. The trip unit structure for measurement according to claim 5, characterized in that, The coil (17) is connected in series with the external main circuit. The slide rod (18) is a semi-threaded screw. The screw barrel (21) is slidably connected with the slide barrel (16), and the other end of the slide barrel (16) is connected to the screw barrel (21) through the spring (22). The chuck (14) is engaged with the chuck head (15). The input end of the signal switch (25) is connected to the external power supply, and the output end of the signal switch (25) is connected to the input end of the external signal receiver.

Images