Mutual inductor and circuit breaker

Abstract

The utility model discloses a mutual inductor and a circuit breaker, and relates to the technical field of circuit breakers, the mutual inductor is used for monitoring a to-be-measured piece, and the mutual inductor comprises a mutual inductor main body and a temperature measurement assembly. The to-be-measured piece is arranged in the mutual inductor body in a penetrating mode, and the temperature measuring assembly is installed on the mutual inductor body. The temperature measuring assembly is provided with a monitoring point, the monitoring point is located on the inner side of the mutual inductor body, a monitored point is arranged on the peripheral face of the to-be-measured piece, the monitored point is located on the inner side of the mutual inductor body, the monitoring point and the monitored point are oppositely arranged, and the monitoring point is used for monitoring the temperature of the monitored point. According to the mutual inductor and the circuit breaker, the temperature in the circuit breaker can be monitored while the current in the circuit breaker is monitored, and protection on the circuit breaker is further enhanced.

Description

Technical Field

[0001] The present application relates to the technical field of circuit breakers, and in particular to a mutual inductor and a circuit breaker. Background Art

[0002] In the power system, circuit breakers are usually used as switches for equipment, controlling current and isolating power equipment. With the continuous development of intelligence, it is necessary to monitor various parameters of circuit breakers during use.

[0003] In the prior art, a mutual inductor is installed in the circuit breaker to monitor the current passing through the circuit breaker through the mutual inductor to protect the circuit breaker. However, in terms of temperature monitoring of the circuit breaker, the prior art has the problem that no temperature monitoring module is installed or the installed temperature monitoring module occupies a large amount of internal space of the circuit breaker.

[0004] Therefore, there is an urgent need to provide a component that can simultaneously monitor the current and temperature in a circuit breaker to solve the problems of the prior art. Utility Model Content

[0005] The purpose of the present application is to provide a mutual inductor and a circuit breaker, which can monitor the temperature inside the circuit breaker while monitoring the current in the circuit breaker, thereby further enhancing the protection of the circuit breaker.

[0006] In the first aspect, the embodiment of the present application provides a mutual inductor for monitoring a part to be tested, the mutual inductor comprising a mutual inductor body and a temperature measuring component. The part to be tested is arranged in the mutual inductor body, and the temperature measuring component is installed in the mutual inductor body. The temperature measuring component has a monitoring point, the monitoring point is located on the inner side of the mutual inductor body, the outer peripheral surface of the part to be tested is provided with a monitored point, the monitored point is located on the inner side of the mutual inductor body, the monitoring point is arranged opposite to the monitored point, and the monitoring point is used to monitor the temperature of the monitored point.

[0007] Based on the above-mentioned embodiments of the present application, the temperature measuring component is installed on the transformer body, and the monitoring point of the temperature measuring component is located on the inner side of the transformer body. The temperature of the part to be tested can be monitored by the temperature measuring component while the transformer body is monitoring the part to be tested. In addition, the monitoring coil of the transformer body can monitor the current of the part to be tested. Therefore, the transformer can obtain the current, temperature and other parameters of the part to be tested at the same time, which is conducive to comprehensively judging the working state of the part to be tested, improving the accuracy of the analysis of the working state of the part to be tested, and thus improving the safety and stability of the use of the part to be tested. The above is explained by taking the current transformer as an example. The voltage transformer can also replace the above-mentioned current transformer to realize the monitoring of the voltage of the part to be tested.

[0008] In a possible design, a mounting groove is provided in the transformer body, an avoidance hole is provided in the inner ring of the transformer body, and the mounting groove is connected to the avoidance hole. The temperature measuring component includes a temperature sensor, which is installed in the mounting groove and can extend from the avoidance hole to the inner side of the transformer body, and the monitoring point is set at the extended part of the temperature sensor.

[0009] Based on the above-mentioned embodiments of the present application, the above-mentioned partial temperature measurement components are installed in the installation grooves provided on the transformer body, and the installation grooves can support and position the temperature measurement components, and the structure of the installation grooves is simple and easy to manufacture. Specifically, the temperature sensor is installed in the installation groove. Under the premise of not affecting the normal use of the transformer body, the temperature measurement components are installed outside the transformer separately, and the volume occupied is smaller, and the overall structure of the transformer is more compact.

[0010] In a possible design, the temperature sensor includes an assembly part and a monitoring part connected to each other. The assembly part is slidably disposed in the installation groove, and the monitoring part can extend or retract out of the clearance hole as the assembly part slides.

[0011] Based on the above-mentioned embodiments of the present application, sliding the temperature sensor in the installation groove can improve the flexibility of the temperature sensor, making it easier for the temperature sensor to slide to a position close to or in contact with the object to be tested, so that the monitoring point on the temperature sensor can maintain a distance from the monitored point, thereby accurately measuring the temperature of the monitored point on the object to be tested, and effectively improving the temperature measurement accuracy of the temperature sensor.

[0012] In a possible design, the temperature measuring component also includes an elastic member, which is arranged in the installation groove, the first end of the elastic member is connected to or abuts the temperature sensor, the second end of the elastic member is connected to or abuts the groove wall of the installation groove, and the temperature sensor extends out of the avoidance hole under the action of the elastic member, and the monitoring point is on the side of the avoidance hole close to the inner side of the transformer body.

[0013] Based on the above-mentioned embodiments of the present application, the setting of the elastic part can exert elastic force on the temperature sensor, so that the monitoring point on the temperature sensor always has a tendency to move out of the avoidance hole, so that the temperature sensor can always be close to the object to be tested, so as to improve the temperature measurement accuracy of the temperature sensor on the object to be tested.

[0014] In a possible design, the assembly part includes a limit part and a guide part connected to each other, the limit part is connected to the monitoring part, and the guide part is arranged on a side of the limit part away from the monitoring part. The limit part is slidably connected to the installation groove, the elastic part is between the limit part and the groove wall of the installation groove, and the first end of the elastic part is sleeved on the guide part.

[0015] Based on the above-mentioned embodiments of the present application, the setting of the limiting part can limit the elastic part abutting against the assembly part, and also serve as the force-bearing part of the assembly part when the elastic part pushes against the assembly part. The setting of the guiding part can guide the elastic part. On the one hand, it can guide the elastic part during the assembly process, so that the elastic part can accurately abut against the limiting part. On the other hand, it can guide the elastic part when the elastic part applies elastic force to the assembly part, so as to avoid the deviation of the direction of the elastic force applied by the elastic part to the limiting part, which causes the temperature sensor to be separated from the installation groove, thereby improving the matching stability between the elastic part and the temperature sensor, and thus improving the assembly stability of the temperature sensor.

[0016] In a possible design, at least one group of temperature measuring components is provided, at least one installation slot is provided, and the temperature measuring component is installed in the corresponding installation slot.

[0017] Based on the above-mentioned embodiments of the present application, a set of temperature measuring components has one monitoring point, corresponding to monitoring one monitored point, that is, temperature monitoring is performed on a single position of the object to be tested. Setting up multiple sets of temperature measuring components can monitor the temperature of the object to be tested from different positions, which can reduce the monitoring error caused by uneven temperature distribution of the object to be tested and effectively improve the accuracy of temperature monitoring of the object to be tested.

[0018] In a possible design, a cover body is provided on the mounting groove, and the cover body is installed in the mounting groove and covers the groove opening of the mounting groove.

[0019] Based on the above-mentioned embodiments of the present application, the cover body is provided to close the notch of the installation slot, which can reduce the risk of the temperature measuring component detaching from the installation slot, improve the assembly stability of the temperature measuring component, ensure that the temperature measuring component does not affect the use of the transformer body and can work normally in the transformer body, thereby ensuring that the part to be tested is under the monitoring of the temperature measuring component, avoiding the normal use of the part to be tested due to failure of the temperature measuring component.

[0020] In a possible design, a wiring groove is provided on the groove wall of the installation groove, the wiring groove is connected with the installation groove, and a wire pressing edge is provided on the cover body, and the wire pressing edge is at least partially located in the wiring groove.

[0021] Based on the above-mentioned embodiments of the present application, the wiring trough is used to arrange the wires on the temperature sensor so that the wires on the temperature sensor pass through the installation slot and connect to the external mechanism. After the cover is connected to the installation slot, the wire pressing edge on the cover extends into the wiring trough and limits the wires, which can prevent the wires from shaking in the wiring trough and affecting the use of the temperature measuring component. This setting form can improve the installation stability of the temperature measuring component without affecting the use of the temperature measuring component, and make the structure inside the transformer body more compact.

[0022] In a second aspect, the present application also provides a circuit breaker, including a housing, a contact assembly, a controller, and the above-mentioned mutual inductor, wherein part of the contact assembly is a part to be tested. The contact assembly, the controller, and the mutual inductor are installed in the housing, the mutual inductor is sleeved on the part to be tested, the temperature measuring assembly abuts against the part to be tested, and the temperature measuring assembly is electrically connected to the controller.

[0023] Based on the above-mentioned embodiments of the present application, the circuit breaker with the above-mentioned mutual inductor can simultaneously monitor the current and temperature of the part to be tested in the contact assembly, thereby improving the accuracy of monitoring the part to be tested in the contact assembly, so as to accurately judge the working state of the contact assembly, thereby controlling the on and off of the circuit breaker according to the working state of the contact assembly, and improving the safety and stability of the circuit breaker.

[0024] In a possible design, at least one guide groove is provided on the peripheral side of the piece to be tested, a monitored point is provided on one side of the guide groove, and the monitoring point can move along the guide groove and abut against the monitored point.

[0025] Based on the above-mentioned embodiments of the present application, the opening of the guide groove facilitates the adjustment of the distance between the temperature sensor and the object to be tested. During the assembly process of the mutual inductor and the contact assembly, the monitoring part on the temperature sensor can slide along the guide groove relative to the surface of the object to be tested. On the one hand, it is convenient for assembly. During the sliding process along the guide groove, the monitoring part can push the assembly part to slide in the installation groove, so that the temperature sensor is retracted into the installation groove to avoid interference between the object to be tested and the temperature sensor. On the other hand, the monitoring part can be guided to move to the position corresponding to the monitored point, so that the monitoring point can correspond to the monitored point one by one, ensuring the accuracy of the temperature measurement component in measuring the temperature of the object to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A partial cross-sectional view of a circuit breaker provided in an embodiment of the present application.

[0028] Figure 2 A schematic diagram of the structure of a mutual inductor provided in an embodiment of the present application.

[0029] Figure 3 A schematic diagram of the structure of a contact assembly provided in an embodiment of the present application.

[0030] Figure 4 An exploded diagram of a mutual inductor provided in an embodiment of the present application.

[0031] Figure 5 A schematic diagram of the internal structure of a mutual inductor provided in an embodiment of the present application.

[0032] Figure 6 A schematic diagram of the structure of a temperature sensor provided in an embodiment of the present application.

[0033] Figure 7 Provided for the embodiments of this application Figure 4 Cross-sectional view at point A in the middle.

[0034] Figure 8 A schematic diagram of the structure of the cover body provided in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] 100-circuit breaker; 101-housing; 102-contact assembly; 200-transformer; 1-transformer body; 11-installation slot; 111-wiring slot; 12-avoidance hole; 13-first housing; 14-second housing; 15-cover; 151-blocking part; 152-wire pressing edge; 2-temperature measuring assembly; 21-monitoring point; 22-temperature sensor; 221-assembly part; 2211-limiting part; 2212-guide part; 222-monitoring part; 23-elastic part; 3-part to be tested; 31-monitored point; 32-guide slot. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] Monitoring various parameters of the circuit breaker during operation is an important way to ensure the normal operation of the circuit breaker. For example, monitoring the vibration signal, coil current and other parameters of the circuit breaker can be used to monitor the performance and status of the circuit breaker, detect potential problems in time, and avoid electrical accidents caused by faults. At the same time, it can also extend the service life of the equipment and improve the stability and safety of the power system.

[0043] The prior art sets a transformer at the contact of the circuit breaker, uses the transformer to monitor the current or voltage at the contact, and transmits the monitored current or voltage signal to the control part of the circuit breaker, so as to maintain or change the working state of the circuit breaker through the control part according to the current or voltage data.

[0044] In addition, the temperature at the circuit breaker contacts can also be monitored. A temperature measuring component can be provided in the circuit breaker of the prior art. However, due to the improper location of the temperature measuring component, inaccurate temperature monitoring is easily caused. At the same time, the temperature measuring component occupies space in the circuit breaker, making the circuit breaker larger in size, which is not conducive to the use of the circuit breaker.

[0045] Based on this, an embodiment of the present application provides a mutual inductor that can integrate a temperature measurement component on the mutual inductor to achieve monitoring of the temperature at the contact while monitoring the current or voltage at the contact, so as to analyze the working status of the circuit breaker according to the temperature conditions.

[0046] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0047] Please refer to Figures 1 to 3The present embodiment provides a mutual inductor 200 for monitoring a device to be tested 3. The mutual inductor 200 includes a mutual inductor body 1 and a temperature measuring component 2. The device to be tested 3 is arranged through the mutual inductor body 1, and the temperature measuring component 2 is installed on the mutual inductor body 1. The temperature measuring component 2 has a monitoring point 21, which is located inside the mutual inductor body 1. A monitored point 31 is arranged on the outer peripheral surface of the device to be tested 3, which is located inside the mutual inductor body 1. The monitoring point 21 is arranged opposite to the monitored point 31, and the monitoring point 21 is used to monitor the temperature of the monitored point 31.

[0048] Based on the above-mentioned embodiment of the present application, the temperature measuring component 2 is installed on the transformer body 1, and the monitoring point 21 of the temperature measuring component 2 is located inside the transformer body 1. The temperature of the component 3 to be tested can be monitored by the temperature measuring component 2 while the transformer body 1 is monitoring the component 3 to be tested. In addition, the monitoring coil of the transformer body 1 can monitor the current of the component 3 to be tested. Therefore, the transformer 200 can obtain the current, temperature and other parameters of the component 3 to be tested at the same time, which is conducive to comprehensively judging the working state of the component 3 to be tested, improving the accuracy of the analysis of the working state of the component 3 to be tested, and thus improving the safety and stability of the component 3 to be tested. The above is explained by taking the current transformer as an example. The voltage transformer can also replace the above-mentioned current transformer to realize the monitoring of the voltage of the component 3 to be tested.

[0049] Among them, the transformer body 1 can monitor parameters such as current, voltage or power on the device under test 3. In this embodiment, the transformer body 1 is set as a current transformer 200, which is mainly used to monitor the current on the device under test 3. The device under test 3 is inserted into the transformer body 1, that is, the device under test 3 is located in the inner circle of the transformer 200. The current passing through the device under test 3 will generate magnetic flux, and then generate induced electromotive force in the transformer 200, so as to realize the function of the transformer body 1 to monitor the current of the device under test 3.

[0050] Reference Figure 2 and Figure 3 The monitoring point 21 on the temperature measuring component 2 is used to collect temperature, corresponding to the monitored point 31 on the test piece 3, and the monitoring point 21 is close to or in contact with the monitored point 31 to collect the temperature on the test piece 3. Since the monitoring point 21 of the temperature measuring component 2 is arranged on the inner side of the transformer body 1, the monitoring point 21 can measure the temperature of the test piece 3 on the inner side of the transformer body 1. The temperature measuring component 2 can add a temperature measurement function to the transformer 200, and after the monitoring point 21 is arranged on the inner side of the transformer body 1, the temperature measuring component 2 can be embedded in the transformer body 1, thereby saving the space occupied by the temperature measuring component 2, expanding the application range of the transformer 200, and having high practicality.

[0051] Exemplarily, the temperature measuring component 2 can also be arranged on the outside of the transformer body 1, that is, the monitoring point 21 of the temperature measuring component 2 is located on the outside of the transformer body 1. At this time, the temperature measuring component 2 can measure the temperature of the part of the test piece 3 that is penetrated by the transformer body 1 and located outside the transformer body 1, and can also realize the simultaneous monitoring of the current and temperature of the test piece 3, thereby improving the accuracy of monitoring the test piece 3.

[0052] In some embodiments, reference Figure 4 and Figure 5 The transformer body 1 is provided with a mounting groove 11, and the inner circle of the transformer body 1 is provided with an avoidance hole 12, and the mounting groove 11 is connected with the avoidance hole 12. The temperature measuring component 2 includes a temperature sensor 22, which is installed in the mounting groove 11 and can extend from the avoidance hole 12 to the inner side of the transformer body 1, and the monitoring point 21 is set at the extended part of the temperature sensor 22.

[0053] Based on the above-mentioned embodiments of the present application, the above-mentioned partial temperature measuring component 2 is installed in the installation groove 11 provided on the transformer body 1, and the installation groove 11 can support and position the temperature measuring component 2, and the structure of the installation groove 11 is simple and easy to manufacture. Specifically, the temperature sensor 22 is installed in the installation groove 11, and under the premise of not affecting the normal use of the transformer body 1, the volume occupied by the temperature measuring component 2 is smaller than that of the transformer 200 alone, and the overall structure of the transformer 200 is more compact.

[0054] The avoidance hole 12 is provided to avoid the temperature measuring component 2 installed in the installation groove 11, so that the temperature sensor 22 in the temperature measuring component 2 can extend from the avoidance hole 12 to the central hole of the transformer body 1, so as to facilitate the temperature sensor 22 in the temperature measuring component 2 to approach or contact the piece to be measured 3, and monitor the temperature of the piece to be measured 3 through the monitoring point 21 set on the temperature sensor 22. Among them, the central hole is a through hole corresponding to the assembly of the piece to be measured 3 of the transformer body 1, and the monitoring point 21 is set at the part where the temperature sensor 22 can extend from the avoidance hole 12.

[0055] The above-mentioned setting enables the temperature measuring component 2 and the mutual inductor body 1 to cooperate in monitoring multiple parameters of the object to be tested 3, and also ensures that the monitoring point 21 on the temperature sensor 22 is close to the monitored point 31 on the object to be tested 3, which is beneficial to improving the monitoring accuracy and stability of the mutual inductor 200 on the object to be tested 3.

[0056] Reference Figure 5The transformer body 1 may have an internal space, the mounting groove 11 may be arranged in the internal space of the transformer body 1, one of the groove walls of the mounting groove 11 is the inner wall of the transformer body 1, the avoidance hole 12 is provided on the inner wall of the transformer body 1 to connect the mounting groove 11 and the inner side of the transformer body 1, so that the temperature measuring component 2 is installed in the mounting groove 11, and the temperature sensor 22 can extend from the avoidance hole 12 to the mounting groove 11 to monitor the test piece 3. The internal space is a space for assembling the monitoring coil.

[0057] In this embodiment, at least one mounting groove 11 can be provided. When two mounting grooves 11 are provided, two corresponding avoidance holes 12 are also provided. The two mounting grooves 11 are distributed in the internal space of the transformer body 1. Two groups of temperature measuring components 2 are provided and correspondingly installed in the mounting grooves 11. The monitored points 31 at different positions on the test piece 3 can be monitored so as to obtain a more accurate temperature condition of the test piece 3 and improve the monitoring accuracy of the temperature measuring component 2.

[0058] In an optional embodiment, three or more mounting grooves 11 may be provided, and multiple mounting grooves 11 are provided around the inner wall of the transformer body 1. Accordingly, the number and position of the avoidance holes 12 are connected to the mounting grooves 11 in a one-to-one correspondence. The temperature measuring components 2 are provided in the same number and are installed in multiple mounting grooves 11 in a one-to-one correspondence. The specific number and position of the temperature measuring components 2 are not further limited in this application. This setting form can further improve the monitoring accuracy of the temperature measuring component 2 on the test piece 3, so as to more accurately know the working status of the test piece 3. The monitoring accuracy can be improved by separately monitoring multiple monitored points through multiple monitoring points and taking the average temperature value, or removing the middle average value after the head and tail.

[0059] Furthermore, the avoidance hole 12 provided on the inner side wall of the transformer body 1 can be replaced by an avoidance groove. The transformer body 1 is generally composed of a first shell 13 and a second shell 14 connected to each other, the mounting groove 11 is provided on the first shell 13, and the inner side wall of the transformer body 1 is provided on the inner circle of the first shell 13. The avoidance groove is provided on the inner side wall, and the opening direction of the avoidance groove is the same as the opening direction of the mounting groove 11, so that it is convenient for the temperature sensor 22 to be installed in the mounting groove 11 and extend from the avoidance groove to the inner side of the transformer body 1, thereby facilitating the assembly of the temperature measuring component 2 to the transformer body 1.

[0060] In some embodiments, reference Figure 6 and Figure 7 The temperature sensor 22 includes an assembly part 221 and a monitoring part 222 connected to each other. The assembly part 221 is slidably disposed in the mounting groove 11 , and the monitoring part 222 can extend or retract from the clearance hole 12 as the assembly part 221 slides.

[0061] Based on the above-mentioned embodiments of the present application, slidingly setting the temperature sensor 22 in the installation groove 11 can improve the flexibility of the temperature sensor 22, making it easier for the temperature sensor 22 to slide to a position close to or in contact with the test piece 3, so that the monitoring point 21 on the temperature sensor 22 can maintain a distance from the monitored point 31, thereby accurately measuring the temperature of the monitored point 31 on the test piece 3, and effectively improving the temperature measurement accuracy of the temperature sensor 22.

[0062] The assembly part 221 is used to realize the assembly of the entire temperature sensor 22 and the installation groove 11, and can be slidably connected with the installation groove 11 through the assembly part 221. The assembly part 221 slides in the installation groove 11 and the size of the assembly part 221 is larger than the size of the avoidance hole 12, so that the assembly part 221 cannot slide out of the avoidance hole 12. The size of the monitoring part 222 is smaller than the size of the avoidance hole 12. The monitoring part 222 is arranged at the end of the assembly part 221 close to the avoidance hole 12, so that the assembly part 221 can drive the monitoring part 222 to extend out of the avoidance hole 12 during the sliding process. The assembly part 221 can also be fixedly connected to the installation groove 11 as needed.

[0063] In this embodiment, an elastic member or other pushing member can be provided in the installation groove as needed, and the elastic member can apply a thrust to the assembly member 221 to make the assembly member 221 slide in the installation groove 11, so as to drive the monitoring member 222 to move to a position close to or in contact with the object to be measured 3. Similarly, the monitoring member 222 can drive the assembly member 221 to slide in the installation groove 11 in the opposite direction when receiving a thrust. This arrangement can avoid the problem that the monitoring point 21 cannot be close to the monitored point 31 due to the assembly error of the temperature sensor 22, and at the same time facilitate the temperature measuring component 2 to adjust the distance between the monitoring point 21 and the monitored point 31 according to the size error of the object to be measured 3, further ensuring the monitoring accuracy of the temperature measuring component 2.

[0064] In addition, refer to Figure 6 , referring to the figure, the assembly part 221 in this embodiment is designed as a cylinder, which is convenient for the assembly part 221 to slide and rotate in the installation groove 11. Similarly, the monitoring part 222 is also designed as a cylinder and connected to one end of the assembly part 221, which is convenient for the monitoring part 222 to penetrate into or out of the avoidance hole 12. The end of the monitoring part 222 away from the assembly part 221 is set as a spherical surface, and the vertex of the spherical surface is the monitoring point 21. The use of a spherical setting can make the temperature sensor 22 more concentrated in collecting temperature, which is beneficial to improving the monitoring accuracy of the temperature sensor 22. The temperature sensor 22 can also adopt an integrated setting so that the assembly part 221 and the monitoring part 222 are set as a whole.

[0065] In an optional embodiment, the assembly part 221 can also be set as a prism, a prism, a truncated cone or other structures, as long as the function of being able to slide and adjust smoothly in the installation groove 11 is met. Similarly, the monitoring part 222 can also be set as a cone or other similar shapes without affecting the temperature measurement accuracy. The specific shape and structure of the assembly part 221 and the monitoring part 222 are not further limited in this application.

[0066] In some embodiments, reference Figure 4 , Figure 5 and Figure 7 The temperature measuring component 2 also includes an elastic member 23, which is arranged in the mounting groove 11, a first end of the elastic member 23 is connected to or abuts the temperature sensor 22, and a second end of the elastic member 23 is connected to or abuts the groove wall of the mounting groove 11. The temperature sensor 22 extends out of the avoidance hole 12 under the action of the elastic member 23, and the monitoring point 21 is located on the side of the avoidance hole 12 close to the inner side of the transformer body 1.

[0067] Based on the above-mentioned embodiments of the present application, the setting of the elastic member 23 can exert an elastic force on the temperature sensor 22, so that the monitoring point 21 on the temperature sensor 22 always has a movement tendency to extend out of the avoidance hole 12, so that the temperature sensor 22 can always be close to the test piece 3, so as to improve the temperature measurement accuracy of the temperature sensor 22 on the test piece 3.

[0068] Specifically, the elastic member 23 is arranged in the mounting groove 11, one end of the elastic member 23 is connected to or abuts against the assembly part 221 of the temperature sensor 22, and the other end is connected to or abuts against the groove wall of the mounting groove 11 away from the avoidance hole 12. The elastic member 23 is arranged between the temperature sensor 22 and the mounting groove 11. In the present application, the distance between the temperature sensor 22 and the mounting groove 11 is less than or equal to the length of the elastic member 23 in a free state. Therefore, in the present application, the elastic member 23 can always provide elastic force to the temperature sensor 22, so that the assembly part 221 of the temperature sensor 22 slides in the direction of the avoidance hole 12, and then the monitoring member 222 extends from the avoidance hole 12 to be close to the test piece 3.

[0069] In this embodiment, refer to Figure 4 and Figure 5, the elastic member 23 is set as a spring, one end of the spring abuts against the groove wall of the installation groove 11 away from the avoidance hole 12, and the other end of the spring abuts against the end of the assembly part 221 away from the monitoring part 222. When the spring is in a compressed state, it can apply elastic force to the assembly part 221 to push the temperature sensor 22 in the direction of the avoidance hole 12. The setting of the spring has the characteristics of simple structure, low cost, easy installation and stable action. It is also convenient to adjust. It only needs to apply a force opposite to the elastic force and greater than the elastic force to the temperature sensor 22 to adjust the position of the temperature sensor 22. Therefore, the use of a spring can effectively maintain the position of the temperature sensor 22, so that the temperature sensor 22 is always in a position close to the test piece 3, which is conducive to improving the monitoring accuracy of the temperature sensor 22.

[0070] The spring can be a compression spring or a tension spring. In the present application, the spring is set as a compression spring. If it is set as a tension spring, the tension spring needs to be set between the temperature sensor 22 and the side of the installation groove 11 close to the avoidance hole 12. In this way, the tension spring can apply a pulling force to the temperature sensor 22, so that the temperature sensor 22 has a tendency to slide toward the avoidance hole 12, so that the monitoring component 222 passes through the avoidance hole.

[0071] Of course, the elastic member 23 can also be set as a spring sheet, spring washer or other similar elastic component, which can apply elastic force to the temperature sensor 22 so that the temperature sensor 22 can slide in the installation groove 11 in the direction of the avoidance hole 12. The present application also does not make any further restrictions on the selection and material of the elastic member 23.

[0072] In some embodiments, reference Figure 6 and Figure 7 The assembly part 221 includes a limit part 2211 and a guide part 2212 connected to each other. The limit part 2211 is connected to the monitoring part 222. The guide part 2212 is arranged on the side of the limit part 2211 away from the monitoring part 222. The limit part 2211 is slidably connected to the installation groove 11. The elastic member 23 is located between the limit part 2211 and the groove wall of the installation groove 11. The first end of the elastic member 23 is sleeved on the guide part 2212.

[0073] Based on the above-mentioned embodiments of the present application, the setting of the limiting portion 2211 can limit the elastic member 23 abutting against the assembly part 221, and also serve as the force-bearing part of the assembly part 221 when the elastic member 23 pushes the assembly part 221. The setting of the guiding portion 2212 can guide the elastic member 23. On the one hand, it can guide the elastic member 23 during the assembly process, so that the elastic member 23 can accurately abut against the limiting portion 2211. On the other hand, it can guide the elastic member 23 when applying elastic force to the assembly part 221, so as to avoid the deviation of the direction of the elastic force applied by the elastic member 23 to the limiting portion 2211, which causes the temperature sensor 22 to be separated from the installation groove 11, thereby improving the matching stability between the elastic member 23 and the temperature sensor 22, thereby improving the assembly stability of the temperature sensor 22.

[0074] Specifically, the limiting portion 2211 is arranged on the side of the assembly part 221 close to the monitoring part 222, and the guiding portion 2212 is arranged on the side of the assembly part 221 away from the monitoring part 222. In the present application, the diameter of the limiting portion 2211 is larger than the diameter of the guiding portion 2212, so that when the compression spring is sleeved on the guiding portion 2212, its end will abut against the side of the limiting portion 2211 facing the guiding portion 2212. The setting of the guiding portion 2212 can reduce the possibility of the compression spring being deviated in direction when applying elastic force to the limiting portion 2211, so that the monitoring portion can accurately pass through the avoidance hole 12.

[0075] In an optional embodiment, the limiting portion 2211 can also be configured as an annular groove opened on the assembly part 221, and the end of the compression spring can extend into the annular groove to abut the assembly part 221. The boss in the center of the annular groove is the guide portion 2212. This setting can further enhance the limiting effect of the elastic member 23, ensuring that the direction of the force applied by the elastic member 23 to the assembly part 221 always remains the same as the axial direction of the temperature sensor 22, thereby preventing the elastic member 23 from pushing the temperature sensor 22 out of the mounting groove 11.

[0076] In some embodiments, at least one group of temperature measuring components 2 is provided, at least one installation slot 11 is provided, and the temperature measuring component 2 is installed in the corresponding installation slot 11 .

[0077] Based on the above-mentioned embodiments of the present application, a set of temperature measuring components 2 has a monitoring point 21, corresponding to monitoring a monitored point 31, that is, temperature monitoring is performed on a single position of the test piece 3. Arranging multiple sets of temperature measuring components 2 can monitor the temperature of the test piece 3 from different positions, which can reduce the monitoring error caused by uneven temperature distribution of the test piece 3 and effectively improve the accuracy of temperature monitoring of the test piece 3.

[0078] Reference Figure 5In the present embodiment, two mounting grooves 11 are provided, and two avoidance holes 12 are provided corresponding to the mounting grooves 11. Accordingly, two groups of temperature measuring components 2 are provided, and the two groups of temperature measuring components 2 are arranged at intervals along the inner circle of the transformer body 1 to correspond to the two monitored points 31 at corresponding positions on the piece to be tested 3, so as to facilitate the analysis of the actual temperature of the piece to be tested 3 according to the monitoring results of the two monitored points 31. The data obtained by monitoring in this setting form is more accurate, which is conducive to timely and accurate control of the use of the piece to be tested 3, thereby improving the safety and service life of the piece to be tested 3.

[0079] In an optional embodiment, the temperature measuring components 2 can also be provided with at least three groups. Taking four groups as an example, four groups of mounting grooves 11 and avoidance holes 12 are provided accordingly. The four groups of temperature measuring components 2 are arranged at intervals in the inner circle of the transformer body 1. In this way, the temperature value of the measured piece to be tested 3 is more accurate, which is more conducive to controlling the piece to be tested 3 and improving the safety of the use of the piece to be tested 3.

[0080] In some embodiments, reference Figure 4 and Figure 5 A cover body 15 is provided on the mounting groove 11 , and the cover body 15 is installed in the mounting groove 11 and covers the notch of the mounting groove 11 .

[0081] Based on the above-mentioned embodiments of the present application, the cover body 15 is configured to close the notch of the mounting groove 11, which can reduce the risk of the temperature measuring component 2 being detached from the mounting groove 11, improve the assembly stability of the temperature measuring component 2, and ensure that the temperature measuring component 2 does not affect the use of the transformer body 1 and can work normally in the transformer body 1, thereby ensuring that the part to be tested 3 is under the monitoring of the temperature measuring component 2, and avoiding the normal use of the part to be tested 3 affected by the failure of the temperature measuring component 2.

[0082] Specifically, the elastic member 23 and the temperature sensor 22 in the temperature measuring assembly 2 are installed in the installation groove 11. Since the elastic member 23 has elastic force, it is easy for the elastic member 23 to come out of the opening of the installation groove 11 after being compressed. At the same time, when the elastic member 23 applies elastic force to the temperature sensor 22, the temperature sensor 22 is also easy to come out of the opening of the installation groove 11. Therefore, the setting of the cover body 15 can effectively prevent the elastic member 23 and the temperature sensor 22 from being offset in the installation groove 11 or coming out of the installation groove 11.

[0083] Among them, the cover body 15 is provided with fasteners, and the mounting groove 11 is provided with fastening holes. The cover body 15 is connected to the mounting groove 11 through the cooperation of the fasteners and the fastening holes and covers the groove, so as to stably seal the temperature measuring component 2 in the mounting groove 11. Of course, the cover body 15 can also be connected to the mounting groove 11 by other connection forms, such as by snap-fitting or pasting, etc., which can also achieve stable connection of the cover body 15. The specific structure is relatively common and will not be repeated in this application.

[0084] In addition, refer to Figure 8 A blocking portion 151 is provided on one side of the cover body 15 close to the avoidance hole 12, and the blocking portion 151 is adapted to the avoidance hole 12. After the cover body 15 is connected to the mounting groove 11, the blocking portion 151 can extend into the avoidance hole 12, thereby blocking the monitoring component 222 located in the avoidance hole 12 and preventing the monitoring component 222 from escaping from the avoidance hole 12.

[0085] In some embodiments, a wiring groove 111 is provided on the groove wall of the installation groove 11, and the wiring groove 111 is connected to the installation groove 11. A wire pressing edge 152 is provided on the cover body 15, and the wire pressing edge 152 is at least partially located in the wiring groove 111. Figure 4 .

[0086] Based on the above-mentioned embodiment of the present application, the wiring groove 111 is used to arrange the wires on the temperature sensor 22, so that the wires on the temperature sensor 22 pass through the installation groove 11 and are connected to the external mechanism. After the cover 15 is connected to the installation groove 11, the wire pressing edge 152 on the cover 15 partially extends into the wiring groove 111 and limits the wires, which can prevent the wires from shaking in the wiring groove 111 and affecting the use of the temperature measuring component 2. This setting form can improve the installation stability of the temperature measuring component 2 without affecting the use of the temperature measuring component 2, and make the structure in the transformer body 1 more compact.

[0087] Specifically, the wiring groove 111 is provided on two opposite groove walls of the installation groove 11, and the temperature sensor 22 slides between the two opposite groove walls. The length of the wiring groove 111 is greater than or equal to the sliding distance of the temperature sensor 22 in the installation groove 11, so that the wiring groove 111 can avoid blocking the wire and affecting the sliding of the temperature sensor 22 in the installation groove 11. Figure 8 The wire pressing edge 152 is arranged on one side of the cover body 15 facing the notch of the installation groove 11. The size of the wire pressing edge 152 is slightly smaller than the size of the wiring groove 111, so that there is a gap between the wire pressing edge 152 and the wiring groove 111 for the wire to move, thereby preventing the wire from being stuck in the wiring groove 111 and unable to move, affecting the sliding of the temperature sensor 22.

[0088] Second, refer to Figures 1 to 3 The embodiment of the present application further provides a circuit breaker 100, comprising a housing 101, a contact assembly 102, a controller and the above-mentioned mutual inductor 200, wherein the contact assembly 102 is a part of the test piece 3. The contact assembly 102, the controller and the mutual inductor 200 are installed in the housing 101, the mutual inductor 200 is sleeved on the test piece 3, the temperature measuring assembly 2 abuts against the test piece 3, and the temperature measuring assembly 2 is electrically connected to the controller.

[0089] Based on the above-mentioned embodiments of the present application, the circuit breaker 100 having the above-mentioned mutual inductor 200 can simultaneously perform current monitoring and temperature monitoring on the piece to be tested 3 in the contact assembly 102, thereby improving the accuracy of monitoring the piece to be tested 3 in the contact assembly 102, so as to accurately judge the working state of the contact assembly 102, thereby controlling the on and off of the circuit breaker 100 according to the working state of the contact assembly 102, and improving the safety and stability of the circuit breaker 100.

[0090] Specifically, refer to Figure 1 The contact assembly 102 is installed on the housing 101, and the mutual inductor 200 is sleeved on the piece to be tested 3 of the contact assembly 102. When the circuit breaker 100 is in a connected state, the mutual inductor body 1 in the mutual inductor 200 will monitor the current on the piece to be tested 3 and transmit the monitored signal to the controller through a wire. When the circuit breaker 100 or the line where the circuit breaker 100 is located fails and causes abnormal current at the piece to be tested 3, the mutual inductor 200 monitors the abnormal current signal and transmits it to the controller, and the controller controls the circuit breaker 100 to disconnect, thereby ensuring the safety of the electrical circuit.

[0091] Similarly, when the circuit breaker 100 is in working state, the temperature measuring component 2 in the mutual inductor 200 will monitor the temperature of the test piece 3, and transmit the monitored temperature signal to the controller through the wire. When the temperature of the test piece 3 is abnormal, the temperature measuring component 2 transmits the monitored abnormal signal to the controller, and the controller controls the circuit breaker 100 to disconnect to ensure the safety of the circuit breaker 100. The specific method and logic of the mutual inductor 200 sending a signal to the controller and the controller receiving the signal and controlling the circuit breaker 100 to be turned on and off are prior art and will not be repeated here.

[0092] In some embodiments, reference Figure 3 At least one guide groove 32 is provided on the peripheral side of the test piece 3 , and a monitored point 31 is provided on one side of the guide groove 32 . The monitoring point 21 can move along the guide groove 32 and abut against the monitored point 31 .

[0093] Based on the above-mentioned embodiments of the present application, the opening of the guide groove 32 facilitates the adjustment of the distance between the temperature sensor 22 and the object to be tested 3. During the assembly process of the mutual inductor 200 and the contact assembly 102, the monitoring member 222 on the temperature sensor 22 can slide along the guide groove 32 relative to the surface of the object to be tested 3. On the one hand, it is convenient for assembly. During the sliding process along the guide groove 32, the monitoring member 222 can push the assembly member 221 to slide in the installation groove 11, so that the temperature sensor 22 is retracted into the installation groove 11, avoiding interference between the object to be tested 3 and the temperature sensor 22. On the other hand, the monitoring member 222 can be guided to move to a position corresponding to the monitored point 31, so that the monitoring point 21 can correspond to the monitored point 31 one by one, ensuring the accuracy of the temperature measurement of the object to be tested 3 by the temperature measuring assembly 2.

[0094] Among them, the guide groove 32 is opened on the edge of the piece to be tested 3, and the monitored point 31 is set at the end of the guide groove 32. When the mutual inductor 200 is assembled on the piece to be tested 3, the temperature sensor 22 is close to the edge of the piece to be tested 3, and the end of the monitoring part 222 away from the assembly part 221 will abut the bottom of the guide groove 32. During the movement of the monitoring part 222 along the guide groove 32 to the end of the guide groove 32, the monitoring part 222 is compressed to avoid the hole 12. When it moves to the monitoring point 21 corresponding to the monitored point 31, the mutual inductor 200 and the piece to be tested 3 are assembled, that is, the temperature measuring component 2 can measure the temperature of the piece to be tested 3.

[0095] In addition, the number and location of the guide grooves 32 and the monitored points 31 may be the same as or different from the number and location of the temperature measuring components 2, that is, multiple monitored points 31 may be arranged on the outer peripheral surface of the test piece 3, and multiple temperature measuring components 2 measure the temperature of multiple monitored points 31 at the same time, which can further enhance the temperature monitoring of the test piece 3 and improve the monitoring accuracy.

[0096] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mutual inductor, characterized in that: Used to monitor the device under test, the mutual inductor comprises: a mutual inductor body and a temperature measuring component; the device under test is inserted into the mutual inductor body, and the temperature measuring component is installed on the mutual inductor body; The temperature measuring component has a monitoring point, which is located on the inner side of the transformer body. The outer peripheral surface of the piece to be measured is provided with a monitored point, which is located on the inner side of the transformer body. The monitoring point is arranged opposite to the monitored point, and the monitoring point is used to monitor the temperature of the monitored point.

2. The mutual inductor according to claim 1, characterized in that: The transformer body is provided with a mounting groove, the inner ring of the transformer body is provided with an avoidance hole, and the mounting groove is communicated with the avoidance hole; The temperature measuring component comprises a temperature sensor, which is installed in the installation groove and can extend from the avoidance hole to the inner side of the mutual inductor body, and the monitoring point is arranged at the extending part of the temperature sensor.

3. The mutual inductor according to claim 2, characterized in that: The temperature sensor comprises an assembly part and a monitoring part which are connected to each other. The assembly part is slidably arranged in the installation groove, and the monitoring part can extend out of or retract into the avoidance hole as the assembly part slides.

4. The mutual inductor according to claim 3, characterized in that: The temperature measuring component also includes an elastic member, which is arranged in the installation groove, the first end of the elastic member is connected to or abuts the temperature sensor, the second end of the elastic member is connected to or abuts the groove wall of the installation groove, and the temperature sensor extends out of the avoidance hole under the action of the elastic member, and the monitoring point is located on the side of the avoidance hole close to the inner side of the transformer body.

5. The mutual inductor according to claim 4, characterized in that: The assembly part comprises a limit part and a guide part connected to each other, the limit part is connected to the monitoring part, and the guide part is arranged on a side of the limit part away from the monitoring part; The limiting portion is slidably connected to the mounting groove, the elastic member is located between the limiting portion and the groove wall of the mounting groove, and the first end of the elastic member is sleeved on the guide portion.

6. The mutual inductor according to any one of claims 2 to 5, characterized in that: At least one group of the temperature measuring components is provided, at least one installation slot is provided, and the temperature measuring component is installed in the corresponding installation slot.

7. The mutual inductor according to claim 6, characterized in that: A cover body is arranged on the installation slot, and the cover body is installed on the installation slot and covers the notch of the installation slot.

8. The mutual inductor according to claim 7, characterized in that: A wiring groove is provided on the groove wall of the installation groove, and the wiring groove is communicated with the installation groove. A wire pressing edge is provided on the cover body, and at least a part of the wire pressing edge is located in the wiring groove.

9. A circuit breaker, characterized in that: It comprises a housing, a contact assembly, a controller and the transformer according to any one of claims 1 to 8, wherein a part of the contact assembly is the device to be tested; The device to be tested, the controller, and the mutual inductor are installed in the housing. The mutual inductor is sleeved on the device to be tested. The temperature measuring component abuts against the device to be tested. The temperature measuring component is electrically connected to the controller.

10. The circuit breaker according to claim 9, characterized in that At least one guide groove is provided on the peripheral side of the test piece, and the monitored point is provided on one side of the guide groove. The monitoring point can move along the guide groove and abut against the monitored point.

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