CN212674325U - Temperature measuring device for circuit breaker - Google Patents

Abstract

The utility model discloses a temperature measuring device for circuit breaker, the circuit breaker includes drain pan, upper cover, face lid, moving contact subassembly, static contact subassembly, deciliter operating device subassembly, arc-extinguish chamber, trip gear, operating handle, and the upper cover lid closes and fixes on the upper portion of drain pan, and the face lid closes and fixes on upper cover upper portion, temperature measuring device sets up near the preceding connecting conductor of static contact subassembly or/and near the back connecting conductor of moving contact subassembly, and temperature measuring device is used for measuring the preceding connecting conductor's of static contact subassembly temperature or/and the back connecting conductor's of moving contact subassembly temperature. The utility model discloses a temperature measuring device for circuit breaker adopts conventional temperature acquisition technique, gathers the thinking through designing out ingenious sensor mounting means, has solved the difficult problem of multiple sensor installation, has reached high reliable insulation and electrical isolation simultaneously, has realized simple to operate, low cost, multi-functional target.

Description

Temperature measuring device for circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to temperature measuring device for circuit breaker.

Background

The existing circuit breaker generally has no connecting conductor for the circuit breaker, particularly has no temperature acquisition for an external terminal of a main loop, and because the current of the main loop of the circuit breaker is relatively large when the circuit breaker is used, if the crimping of a connecting terminal is unreliable, the connecting resistance is relatively large, the part with contact defects can be locally overheated when a large current passes through, and even the connecting terminal can be burnt, so that electrical faults and even electrical fire are caused. Therefore, it is necessary to monitor the temperature of the breaker connection terminals. The monitoring scheme to circuit breaker connecting terminal is by a lot of, and the monitoring scheme who commonly uses has infrared image monitoring and external temperature sensor direct monitoring. The infrared image monitoring scheme has high equipment cost and larger technical difficulty, is not suitable for large-scale application, and particularly has larger difficulty in multi-path monitoring. The technical problems that an external temperature sensor is adopted for direct monitoring, the application and installation are complex, the temperature sensor needs to be installed on each connecting terminal, a main circuit of the circuit breaker is strong current, a control monitoring circuit is weak current, and insulation and isolation exist between the strong current and the weak current are solved.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a temperature measuring device for circuit breaker adopts conventional temperature acquisition technique, gathers the thinking through designing out ingenious sensor mounting means, has solved the difficult problem of multisensor installation, has reached high reliable insulation and electrical isolation simultaneously, has realized simple to operate, low-cost, multi-functional target.

In order to solve the technical problem, the utility model relates to a temperature measuring device for circuit breaker realizes through following technical scheme:

the utility model provides a temperature measuring device for circuit breaker, the circuit breaker includes drain pan, upper cover, face lid, moving contact subassembly, static contact subassembly, deciliter operating device subassembly, arc-extinguishing chamber, trip gear, operating handle, and the upper cover lid closes and fixes on the upper portion of drain pan, and the face lid closes and fixes on upper cover upper portion, temperature measuring device sets up near the preceding connecting conductor of static contact subassembly or/and near the back connecting conductor of moving contact subassembly, and temperature measuring device is used for measuring the preceding connecting conductor's of static contact subassembly temperature or/and the back connecting conductor's of moving contact subassembly temperature. By adopting the technical scheme, the temperature measuring device for the circuit breaker adopts the conventional temperature acquisition technology, adopts an ingenious sensor installation mode acquisition idea, solves the difficult problem of installation of a multi-path sensor, simultaneously achieves high-reliability insulation and electrical isolation, and achieves the aims of convenience in installation, low cost and multiple functions.

As the utility model discloses an improvement, temperature measuring device is the temperature sensor subassembly, the concave temperature sensor mounting hole that is equipped with in the back of drain pan, the temperature sensor mounting hole is located the preceding connecting conductor's of static contact subassembly below or/and the rear connecting conductor's of moving contact subassembly below, and the temperature sensor unit mount is in the temperature sensor mounting hole.

As the utility model discloses an improvement, the temperature sensor mounting hole is located preceding connecting conductor's preceding connecting terminal's below and is located preceding connecting nut's rear or back connecting conductor's back connecting terminal's below and is located back connecting nut's the place ahead, and the temperature sensor mounting hole is mutually perpendicular with preceding connecting terminal or/and back connecting terminal mutually perpendicular.

As the utility model discloses an improvement, the temperature sensor mounting hole is the blind hole, and the temperature sensor subassembly keeps apart or/and the back is insulating material keeps apart for connecting terminal with insulating material for the front end connection terminal.

As the utility model discloses an improvement, the temperature sensor subassembly, including temperature sensor installation stopper, temperature sensor includes the temperature sensor body, sensor lead wire one, sensor lead wire two, sensor lead wire weld part one, sensor lead wire weld part two, one end of drawing forth end connection sensor lead wire weld part one of temperature sensor body, sensor lead wire one is connected to the other end of sensor lead wire weld part one, another one end of drawing forth end connection sensor lead wire weld part two of temperature sensor body, sensor lead wire two is connected to the other end of sensor lead wire weld part two, the temperature sensor body, sensor lead wire one, sensor lead wire two, sensor lead wire weld part one, sensor lead wire weld part two is all installed on the temperature sensor installation stopper.

As the utility model discloses an improvement, temperature sensor installs stopper includes round platform body, cylinder, and the top of round platform body is connected to the bottom of cylinder, and cylinder and round platform body are coaxial to be arranged, and the cylinder is less than the round platform body a little, and round platform body and temperature sensor mounting hole interference fit are provided with temperature sensor body mounting groove on the sensor installation plug, sensor and draw forth end mounting groove, sensor lead wire weld part mounting groove, two mounting grooves of sensor lead wire weld part, a sensor lead wire mounting groove and two mounting grooves of sensor lead wire.

As an improvement of the utility model, the temperature sensor is cylindrical, two leading-out ends are respectively arranged at two ends of the temperature sensor, a mounting groove of the temperature sensor body is arranged at the upper part of one side of the cylinder, a mounting groove of the sensor leading-out end is arranged at the middle part of the top end of the cylinder and is concavely arranged at the upper part of the other side of the cylinder, a mounting groove of the sensor lead welding part I is arranged at the middle lower part of one side of the cylinder, a mounting groove of the temperature sensor body is corresponding to and communicated with a mounting groove of the sensor lead welding part I, a mounting groove of the sensor lead welding part II is arranged at the middle lower part of the other side of the cylinder, a mounting groove of the sensor leading-out end is communicated with a mounting groove of the sensor lead welding part II, a mounting groove of the sensor lead welding part I is arranged at one side of the circular table body, a, the second mounting groove of the sensor lead welding part corresponds to and is communicated with the second mounting groove of the sensor lead.

As an improvement of the utility model, the temperature sensor is in a water drop shape, two leading-out ends are positioned at one end of the temperature sensor, a concave groove of a mounting groove of the temperature sensor body is arranged at the middle part of the top end of a cylinder, mounting grooves of leading-out ends of the sensor are respectively arranged at the middle upper parts of two sides of the cylinder, a concave groove of a mounting groove of a leading-out end of the sensor is arranged at the middle lower part of one side of the cylinder, two sides of the mounting groove of the temperature sensor body are provided with through grooves, the mounting groove of the leading-out end of the sensor corresponds to and is communicated with the mounting groove of the leading-out end of the sensor at the same side, the concave groove of the mounting groove of the leading-out end of the sensor is arranged at the middle lower part of the other side of the cylinder, the mounting groove of the leading-out end of the, the second sensor lead placing groove is concavely arranged on the other side of the circular truncated cone body, and the second sensor lead welding part placing groove corresponds to and is communicated with the second sensor lead placing groove.

As the improvement of the utility model, sensor lead wire weld part mounting groove and sensor lead wire weld part two mounting grooves all slightly are greater than sensor lead-out end mounting groove, sensor lead wire two mounting grooves, the temperature sensor installation stopper adopts high insulating property's engineering plastics or rubber.

As the utility model discloses an improvement, the circuit breaker still includes circuit board, bottom apron, and the drain pan is connected fixedly with the bottom apron, is equipped with MCU microcontroller, protection and power signal processing module on the circuit board, and the temperature sensor subassembly is connected with protection and power signal processing module, and protection and power signal processing module are connected with MCU microcontroller, and MCU microcontroller is connected with trip gear, and protection and power signal processing module are used for providing trouble and overloaded protection to control is the power supply of circuit board.

Compared with the prior art, the utility model, possess following technological effect at least: the utility model discloses a temperature measuring device for circuit breaker adopts conventional temperature acquisition technique, gathers the thinking through designing out ingenious sensor mounting means, has solved the difficult problem of multiple sensor installation, has reached high reliable insulation and electrical isolation simultaneously, has realized simple to operate, low cost, multi-functional target.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is the utility model relates to an intelligence allies oneself with electronic type moulded case circuit breaker's decomposition structure schematic diagram.

Fig. 2 is a schematic top view of the structure of fig. 1.

Fig. 3 is a schematic cross-sectional view taken along line a-a of fig. 2.

Fig. 4 is an enlarged schematic view of a portion B of fig. 3.

Fig. 5 is the utility model relates to an intelligence allies oneself with electronic type moulded case circuit breaker circuit structure block diagram.

Fig. 6 is a schematic diagram of the back structure of fig. 1.

Fig. 7 is a rear view of the bottom case of fig. 6.

Fig. 8 is a schematic cross-sectional view taken along line C-C of fig. 7.

Fig. 9 is a schematic structural diagram of a temperature sensor assembly of fig. 3.

Fig. 10 is an exploded view of the temperature sensor assembly of fig. 9.

Fig. 11 is a view illustrating a structure of the temperature sensor mounting plug of fig. 9 at an angle.

Fig. 12 is a schematic view of the temperature sensor mounting plug of fig. 9 at another angle.

Fig. 13 is a side view schematically showing the structure of the temperature sensor mounting plug of fig. 9.

Fig. 14 is a schematic cross-sectional view taken along line D-D of fig. 13.

Fig. 15 is a schematic structural view of another temperature sensor assembly of fig. 3.

Fig. 16 is an exploded view of the temperature sensor assembly of fig. 15.

Fig. 17 is a view illustrating an angle of a temperature sensor mounting plug of fig. 15.

Fig. 18 is a schematic view of the temperature sensor mounting plug of fig. 15 at another angle.

Fig. 19 is a side view schematically showing the structure of the temperature sensor mounting plug of fig. 15.

Fig. 20 is a schematic view of the cross-sectional structure of fig. 19 taken along line E-E.

Fig. 21 is a left side view of the temperature sensor mounting plug of fig. 19.

Fig. 22 is a schematic diagram showing a right side view of the temperature sensor mounting plug of fig. 19.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects of the present invention, the following lock drawings and preferred embodiments are described in detail as follows according to the embodiments, structures, features and effects of the present invention.

In the description of the present application, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must be provided with a particular orientation, constructed and operated in a particular orientation, and thus, should not be taken as limiting the present application.

In order to more clearly explain the positional relationship of the components, "up" and "down" in the present application take the up and down shown in fig. 1 and 3 as an example. In order to more clearly explain the positional relationship of the respective members, "front" and "rear" in the present application take the front and rear as shown in fig. 2 and 3 as an example.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Example 1

As shown in fig. 1 to 14, an intelligent electronic molded case circuit breaker comprises a bottom case 1, an upper cover 2, a surface cover 3, a moving contact assembly 4, a static contact assembly 5, a separation and combination operating mechanism assembly 6, an arc extinguishing cover 7, a tripping device 8, an operating handle 9, an intelligent control system, a bottom cover plate 14 and a backup snap-action protection mechanism 15, wherein the upper cover 2 covers the upper part of the bottom case 1, the upper cover 2 and the bottom case 1 are fixedly connected through a connecting piece, the surface cover 3 covers the upper part of the upper cover 2, the surface cover 3 and the upper cover 2 are fixedly connected through a connecting piece, the bottom case 1 and the bottom cover plate 14 are fixedly connected, the operating handle 9 is arranged in a cavity formed by the upper cover 2 and the bottom case 1, the upper end of the operating handle 9 penetrates through the upper cover 2 and extends out of the surface cover 3, the intelligent control system comprises a power supply voltage measuring circuit, a temperature sensor assembly 10, a measuring current transformer 11, a, The remote signaling detection module and the circuit board 13 are respectively electrically connected with the circuit board 13, a power supply voltage measuring circuit, the temperature sensor assembly 10, the measuring current transformer 11, the protection and power supply current transformer 12 and the remote signaling detection module are respectively arranged at the end part of the static contact assembly 5, the temperature sensor assembly 10 is respectively close to the front connecting conductor 51 of the static contact assembly 5 and the rear connecting conductor 41 of the movable contact assembly 4, and the measuring current transformer 11 and the protection and power supply current transformer 12 are respectively sleeved on the rear connecting conductor 41 of the movable contact assembly 4. The power supply voltage measuring circuit is used for measuring power supply voltage, the temperature sensor assembly 10 is used for measuring the temperature of the front connecting conductor 51 of the static contact assembly 5 or/and the temperature of the rear connecting conductor 41 of the movable contact assembly 4, the measuring current transformer 11 is used for measuring load current, and the protecting and supplying current transformer 12 is used for protecting faults and overload and supplying power to the circuit board 13. The circuit board 13 is arranged between the upper cover 2 and the face cover 3, the circuit board 13 is fixedly connected with the upper cover 2, a through hole is formed in the middle of the circuit board 13, and the upper end of the operating handle 9 is inserted into the through hole of the circuit board 13.

As shown in fig. 2, an emergency trip button 31 is arranged in the middle of the left side of the face cover 3, a working state indicator lamp 32 is arranged in the middle of the right side of the face cover 3, a man-machine interface display window 33 is arranged in the middle of the lower portion of the face cover 3, an external control interface 34 is arranged on the left side of the lower portion of the face cover 3, and a local operation key 35 is arranged on the right side of the lower portion of the face cover 3. The operating handle 9 is provided with a separation and combination indicator 91.

As shown in fig. 5, the circuit board 13 is provided with an MCU microcontroller, an alternate collection metering module, and a protection and power supply signal processing module, the power supply voltage measurement circuit is connected to the alternate collection metering module, the measurement current transformer 11 is connected to the alternate collection metering module, the alternate collection metering module is connected to the MCU microcontroller, the temperature sensor assembly 10, the protection and power supply current transformer 12, and the remote signaling detection module are respectively connected to the protection and power supply signal processing module, the protection and power supply signal processing module is connected to the MCU microcontroller, and the MCU microcontroller is connected to the trip device. And the remote signaling detection module is used for detecting the on-off state of the circuit breaker. The intelligent control system of the circuit breaker comprises a power supply voltage measurement system, a load current measurement system, a front wiring terminal and a rear wiring terminal temperature measurement system during working, and a remote signaling and remote control system. In order to achieve the purpose of real-time information sensing and protection of the intelligent power grid terminal, two sets of current transformer measuring systems are adopted for current measurement, one set of current transformer measuring system is used for high-precision alternate acquisition metering, high-precision measurement of voltage and current is achieved, data output such as power, electric quantity, power factor and harmonic analysis is provided, and the comprehensive intelligent sensing function of electricity utilization information is achieved; the other current transformer is used for protection and power supply, and the protection functions of overload, short circuit and the like can be achieved under the condition of no auxiliary power supply. According to the embodiment, whether the circuit breaker works in a normal state or not is judged according to the measured current, voltage and working temperature of each wiring terminal, if an abnormal state occurs, such as an over-voltage fault, an under-voltage fault and an overload short-circuit fault, the working abnormal state of the circuit breaker is output, and opening is carried out or alarm processing is carried out according to the working state. Particularly, the temperature of each wiring terminal is measured and early-warned, the main control microcontroller reads the measured temperature at any time, judges whether the measured temperature is in a normal range or not according to the magnitude of load current and the ambient temperature, outputs an abnormal working state of the circuit breaker if the abnormal working state is judged, and can control the circuit breaker to break if the abnormal working state is not processed within a set time range so as to eliminate potential safety hazards of electricity utilization and avoid electrical fire caused by abnormal working of equipment. Through the intelligent control system of circuit breaker, can realize intelligent control functions such as remote regulation, telemetering measurement, remote signalling, remote control to the circuit breaker, through communication interface, the construction that can conveniently realize smart power grids can be joined in marriage corresponding communication adapter to the development needs of adaptation industry thing networking.

As shown in fig. 6, 7 and 8, a temperature sensor mounting hole 1-1 is concavely formed in the back surface of the bottom case 1, the temperature sensor assembly 10 is mounted in the temperature sensor mounting hole 1-1, and the temperature sensor mounting hole 1-1 is respectively located below the front connecting conductor 51 of the static contact assembly 5 and below the rear connecting conductor 41 of the movable contact assembly 4. Preferably, the temperature sensor mounting holes 1-1 are respectively located below the front connection terminal 511 of the front connection conductor 51 of the static contact assembly 5 and behind the front connection nut 52, and below the rear connection terminal 411 of the rear connection conductor 41 of the movable contact assembly 4 and in front of the rear connection nut 42, the temperature sensor mounting holes 1-1 are respectively perpendicular to the front connection terminal 511 and the rear connection terminal 411, the temperature sensor mounting holes 1-1 are blind holes, and the temperature sensor assembly 10 is respectively isolated from the front connection terminal 511 and the rear connection terminal 411 by insulating materials.

As shown in fig. 9 and 10, the temperature sensor assembly 10 includes a temperature sensor mounting plug 101 and a temperature sensor, the temperature sensor includes a temperature sensor body 104, a first sensor lead 102, a second sensor lead 106, a first sensor lead welding portion 103, and a second sensor lead welding portion 105, one end of the first sensor lead welding portion 103 is connected to one end of the temperature sensor body 104, the other end of the first sensor lead welding portion 103 is connected to the first sensor lead 102, the other end of the temperature sensor body 104 is connected to one end of the second sensor lead welding portion 105, the other end of the second sensor lead welding portion 105 is connected to the second sensor lead 106, the temperature sensor body 104, the first sensor lead 102, the second sensor lead 106, the first sensor lead bond 103, and the second sensor lead bond 105 are all mounted on the temperature sensor mounting plug 101. In the present embodiment, the temperature sensor body 104 has a cylindrical shape, and the two terminals are respectively located at two ends of the temperature sensor body 104.

As shown in fig. 11 to 14, the temperature sensor mounting plug 101 has a cylindrical multi-groove structure, and is made of high-insulation engineering plastic or rubber, and includes a truncated cone 1011 and a cylinder 1012, the bottom of the cylinder 1012 is connected to the top of the truncated cone 1011, the cylinder 1012 and the truncated cone 1011 are coaxially arranged, the cylinder 1012 is slightly smaller than the truncated cone 1011, the truncated cone 1011 and the temperature sensor mounting hole 1-1 are in interference fit, and the temperature sensor assembly 10 can be tightly fitted with the temperature sensor mounting hole 1-1 when the temperature sensor assembly 10 is mounted, so as not to fall off. The sensor mounting plug 101 is provided with a temperature sensor body seating groove 1013, a sensor lead-out seating groove 1014, a first sensor lead bonding portion seating groove 1015, a second sensor lead bonding portion seating groove 1017, a first sensor lead seating groove 1016, and a second sensor lead seating groove 1018. The temperature sensor and the lead wire are soldered or resistance welded, and the welding part of the sensor lead wire is slightly larger than the lead end of the sensor, so that the mounting grooves 1015 of the first mounting groove 1015 of the welding part of the sensor lead wire and the second mounting groove 1017 of the welding part of the sensor lead wire are slightly larger than the mounting grooves 1014 of the leading end of the sensor, the first mounting groove 1016 of the sensor lead wire and the second mounting groove 1018 of the sensor lead wire, the external dimension is not widened after the temperature sensor and the temperature sensor mounting plug are assembled, and the temperature sensor assembly is difficult to be arranged in the temperature sensor.

As shown in fig. 11 to 14, the temperature sensor body receiving groove 1013 is concavely provided at an upper portion of one side of the cylinder 1012, the sensor lead-out receiving groove 1014 is concavely provided at a middle portion of a top end of the cylinder 1012 and concavely provided at an upper portion of the other side of the cylinder 1012, the sensor lead-bonding part one receiving groove 1015 is concavely provided at a middle lower portion of one side of the cylinder 1012, the temperature sensor body receiving groove 1013 corresponds to and communicates with the sensor lead-bonding part one receiving groove 1015, the sensor lead-bonding part two receiving groove 1017 is concavely provided at a middle lower portion of the other side of the cylinder 1012, the sensor lead-out receiving groove 1014 corresponds to and communicates with the sensor lead-bonding part two receiving groove 1017, the sensor lead-bonding part one receiving groove 1016 is concavely provided at one side of the circular table body 1011, the sensor lead-bonding part one receiving groove 1015 corresponds to and communicates with the sensor lead-bonding part one receiving, the second sensor lead bonding portion seating groove 1017 corresponds to and communicates with the second sensor lead seating groove 1018.

Example 2

As shown in fig. 15 to fig. 22, the difference between the intelligent electronic molded case circuit breaker of the embodiment 2 and the intelligent electronic molded case circuit breaker of the embodiment 1 is that: the temperature sensor assembly 10 is slightly different.

As shown in fig. 15 and 16, the temperature sensor assembly 10 includes a temperature sensor mounting plug 101 and a temperature sensor, the temperature sensor includes a temperature sensor body 104, a first sensor lead 102, a second sensor lead 106, a first sensor lead welding portion 103, and a second sensor lead welding portion 105, one end of the first sensor lead welding portion 103 is connected to one end of the temperature sensor body 104, the other end of the first sensor lead welding portion 103 is connected to the first sensor lead 102, the other end of the temperature sensor body 104 is connected to one end of the second sensor lead welding portion 105, the other end of the second sensor lead welding portion 105 is connected to the second sensor lead 106, the temperature sensor body 104, the first sensor lead 102, the second sensor lead 106, the first sensor lead bond 103, and the second sensor lead bond 105 are all mounted on the temperature sensor mounting plug 101. In this embodiment, the temperature sensor body 104 is in the shape of a drop, and two terminals are located at one end of the temperature sensor body 104.

As shown in fig. 17 to 22, the temperature sensor mounting plug 101 has a cylindrical multi-groove structure, and is made of high-insulation engineering plastic or rubber, and includes a truncated cone 1011 and a cylinder 1012, the bottom of the cylinder 1012 is connected to the top of the truncated cone 1011, the cylinder 1012 and the truncated cone 1011 are coaxially arranged, the cylinder 1012 is slightly smaller than the truncated cone 1011, the truncated cone 1011 and the temperature sensor mounting hole 1-1 are in interference fit, and the temperature sensor assembly 10 can be tightly fitted with the temperature sensor mounting hole 1-1 when the temperature sensor assembly 10 is mounted, so as not to fall off. The sensor mounting plug 101 is provided with a temperature sensor body receiving groove 1013, a sensor lead terminal receiving groove 1014, a first sensor lead bonding portion receiving groove 1015, a second sensor lead bonding portion receiving groove 1017, a first sensor lead receiving groove 1016, and a second sensor lead receiving groove 1018. The temperature sensor and the lead wire are soldered or resistance welded, and the welding part of the sensor lead wire is slightly larger than the lead end of the sensor, so that the mounting grooves 1015 of the first mounting groove 1015 of the welding part of the sensor lead wire and the second mounting groove 1017 of the welding part of the sensor lead wire are slightly larger than the mounting grooves 1014 of the leading end of the sensor, the first mounting groove 1016 of the sensor lead wire and the second mounting groove 1018 of the sensor lead wire, the external dimension is not widened after the temperature sensor and the temperature sensor mounting plug are assembled, and the temperature sensor assembly is difficult to be arranged in the temperature sensor.

As shown in fig. 17 to 22, the temperature sensor body receiving groove 1013 is concavely provided in the middle of the top end of the cylinder 1012, the sensor lead-out receiving grooves 1014 are concavely provided in the middle upper parts of both sides of the cylinder 1012, the first sensor lead-bonding part receiving groove 1015 is concavely provided in the middle lower part of one side of the cylinder 1012, both sides of the temperature sensor body receiving groove 1013 are provided with through grooves 1019, the temperature sensor body receiving groove 1013 is communicated with the sensor lead-out receiving groove 1014, the first sensor lead-bonding part receiving groove 1015 corresponds to and communicates with the sensor lead-out receiving groove 1014 on the same side, the second sensor lead-bonding part receiving groove 1017 is concavely provided in the middle lower part of the other side of the cylinder 1012, the second sensor lead-bonding part receiving groove 1017 corresponds to and communicates with the sensor lead-out receiving groove 1014 on the same side, the first sensor lead-bonding part receiving groove 1016 is concavely provided on one side of the circular table body 1011, the first, the second sensor lead mounting groove 1018 is recessed on the other side of the truncated cone 1011, and the second sensor lead soldering portion mounting groove 1017 corresponds to and communicates with the second sensor lead mounting groove 1018.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the above embodiments without departing from the scope of the present invention, but all the modifications, changes and modifications of the above embodiments that do not depart from the technical scope of the present invention are within the scope of the present invention.

Claims (10)

1. The temperature measuring device for the circuit breaker is characterized by comprising a bottom shell (1), an upper cover (2), a face cover (3), a moving contact assembly (4), a static contact assembly (5), a switching-on and switching-off operating mechanism assembly (6), an arc extinguishing cover (7), a tripping device (8) and an operating handle (9), wherein the upper cover (2) is fixedly covered on the upper portion of the bottom shell (1), the face cover (3) is fixedly covered on the upper portion of the upper cover (2), the temperature measuring device is arranged near a front connecting conductor (51) of the static contact assembly (5) or/and near a rear connecting conductor (41) of the moving contact assembly (4), and the temperature measuring device is used for measuring the temperature of the front connecting conductor (51) of the static contact assembly (5) or/and the temperature of the rear connecting conductor (41) of the moving contact assembly (4).

2. A temperature measuring device for a circuit breaker according to claim 1, wherein the temperature measuring device is a temperature sensor assembly (10), a temperature sensor mounting hole (1-1) is concavely formed at a rear surface of the bottom case (1), the temperature sensor mounting hole (1-1) is positioned below a front connection conductor (51) of the fixed contact assembly (5) or/and below a rear connection conductor (41) of the movable contact assembly (4), and the temperature sensor assembly (10) is mounted in the temperature sensor mounting hole (1-1).

3. A temperature measuring device for a circuit breaker according to claim 2, wherein the temperature sensor mounting hole (1-1) is located below the front connection terminal (511) of the front connection conductor (51) and behind the front connection nut (52) or/and below the rear connection terminal (411) of the rear connection conductor (41) and in front of the rear connection nut (42), the temperature sensor mounting hole (1-1) being perpendicular to the front connection terminal (511) or/and to the rear connection terminal (411).

4. A temperature measuring apparatus for a circuit breaker according to claim 2 or 3, wherein the temperature sensor mounting hole (1-1) is a blind hole, and the temperature sensor assembly (10) is isolated from the front connection terminal (511) by an insulating material or/and the rear connection terminal (411) by an insulating material.

5. A temperature measuring device for circuit breaker according to claim 2 or 3, wherein said temperature sensor assembly (10) comprises a temperature sensor mounting plug (101) and a temperature sensor, the temperature sensor comprises a temperature sensor body (104), a first sensor lead (102), a second sensor lead (106), a first sensor lead welding part (103), and a second sensor lead welding part (105), one end of the first sensor lead welding part (103) is connected to one end of the temperature sensor body (104), the other end of the first sensor lead welding part (103) is connected to the first sensor lead (102), the other end of the temperature sensor body (104) is connected to one end of the second sensor lead welding part (105), the other end of the second sensor lead welding part (105) is connected to the second sensor lead (106), and the temperature sensor body (104), The first sensor lead (102), the second sensor lead (106), the first sensor lead welding part (103) and the second sensor lead welding part (105) are all installed on the temperature sensor installation plug (101).

6. The temperature measuring device for the circuit breaker according to claim 5, wherein the temperature sensor mounting plug (101) comprises a truncated cone body (1011) and a cylinder (1012), the bottom of the cylinder (1012) is connected with the top of the truncated cone body (1011), the cylinder (1012) and the truncated cone body (1011) are coaxially arranged, the cylinder (1012) is slightly smaller than the truncated cone body (1011), the truncated cone body (1011) is in interference fit with the temperature sensor mounting hole (1-1), and the sensor mounting plug (101) is provided with a temperature sensor body mounting groove (1013), a sensor lead-out end mounting groove (1014), a sensor lead welding part first mounting groove (1015), a sensor lead welding part second mounting groove (1017), a sensor lead-in mounting groove (1016) and a sensor lead mounting groove (1018).

7. The temperature measuring apparatus for a circuit breaker according to claim 6, wherein the temperature sensor body (104) has a cylindrical shape, two terminals are respectively located at both ends of the temperature sensor body (104), the temperature sensor body receiving groove (1013) is concavely formed at an upper portion of one side of the cylindrical body (1012), the sensor terminal receiving groove (1014) is concavely formed at a middle portion of a top end of the cylindrical body (1012) and an upper portion of the other side of the cylindrical body (1012), the sensor lead welding portion one receiving groove (1015) is concavely formed at a middle lower portion of one side of the cylindrical body (1012), the temperature sensor body receiving groove (1013) corresponds to and communicates with the sensor lead welding portion one receiving groove (1015), the sensor lead welding portion two receiving groove (1017) is concavely formed at a middle lower portion of the other side of the cylindrical body (1012), the sensor terminal receiving groove (1014) communicates with the sensor lead welding portion two receiving groove (1017), the first sensor lead mounting groove (1016) is concavely arranged on one side of the round table body (1011), the first sensor lead welding part mounting groove (1015) corresponds to and is communicated with the first sensor lead mounting groove (1016), the second sensor lead mounting groove (1018) is concavely arranged on the other side of the round table body (1011), and the second sensor lead welding part mounting groove (1017) corresponds to and is communicated with the second sensor lead mounting groove (1018).

8. The temperature measuring device for the circuit breaker according to claim 6, wherein the temperature sensor body (104) is in a drop shape, two lead terminals are located at one end of the temperature sensor body (104), the temperature sensor body receiving groove (1013) is concavely formed at a middle portion of a top end of the cylinder (1012), the sensor lead terminal receiving grooves (1014) are concavely formed at middle upper portions of both sides of the cylinder (1012), the sensor lead welding part one receiving groove (1015) is concavely formed at a middle lower portion of one side of the cylinder (1012), both sides of the temperature sensor body receiving groove (1013) are provided with the through groove (1019), the sensor lead welding part one receiving groove (1015) corresponds to and communicates with the sensor lead terminal receiving groove (1014) at the same side, the sensor lead welding part two receiving grooves (1017) are concavely formed at a middle lower portion of the other side of the cylinder (1012), and the sensor lead welding part two receiving grooves (1017) correspond to the sensor lead terminal receiving grooves (1014) at the same side And are communicated with each other, the first sensor lead mounting groove (1016) is concavely arranged on one side of the circular truncated cone body (1011), the first sensor lead welding part mounting groove (1015) corresponds to and is communicated with the first sensor lead mounting groove (1016), the second sensor lead mounting groove (1018) is concavely arranged on the other side of the circular truncated cone body (1011), and the second sensor lead welding part mounting groove (1017) corresponds to and is communicated with the second sensor lead mounting groove (1018).

9. The temperature measuring apparatus for a circuit breaker according to claim 6, wherein the first sensor lead-welding portion receiving groove (1015) and the second sensor lead-welding portion receiving groove (1017) are slightly larger than the sensor lead-out receiving groove (1014), the first sensor lead-receiving groove (1016), and the second sensor lead-receiving groove (1018), and the temperature sensor mounting plug (101) is made of engineering plastic or rubber having high insulating properties.

10. The temperature measuring device for the circuit breaker according to claim 2 or 3, wherein the circuit breaker further comprises a circuit board (13) and a bottom cover plate (14), the bottom shell (1) is fixedly connected with the bottom cover plate (14), the circuit board (13) is provided with an MCU (microprogrammed control unit) and a protection and power supply signal processing module, the temperature sensor assembly (10) is connected with the protection and power supply signal processing module, the protection and power supply signal processing module is connected with the MCU, the MCU is connected with the trip device (8), and the protection and power supply signal processing module is used for providing protection of faults and overload and controlling power supply to the circuit board (13).

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