CN213519788U

CN213519788U - Temperature measuring device and switch electric appliance with same

Info

Publication number: CN213519788U
Application number: CN202021271701.6U
Authority: CN
Inventors: 甘新华; 翟毅; 张军; 田巧
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-06-22
Anticipated expiration: 2030-07-02

Abstract

A temperature measuring device and a switch electric appliance with the temperature measuring device are provided, wherein the temperature measuring device comprises an insulating cover and a detection unit, one end of the insulating cover is provided with a blind hole for accommodating the detection unit, the other end of the insulating cover is a closed end face, and the detection unit is arranged in the blind hole of the insulating cover; the switch electric appliance comprises an insulating shell and a main loop unit, wherein the insulating shell can push one end of an insulating cover provided with a blind hole, the other end of the insulating cover provided with the blind hole is pressed on a wiring terminal of the main loop unit, the distance from a detection unit to the wiring terminal in the insulating cover is shorter, and the temperature rise of the wiring terminal can be quickly and accurately sensed.

Description

Temperature measuring device and switch electric appliance with same

Technical Field

The utility model relates to a low-voltage apparatus field especially relates to a temperature measuring device and have this temperature measuring device's switching apparatus.

Background

Switch electrical apparatus such as intelligent isolator and intelligent moulded case circuit breaker is often used for control and protection circuit, but current switch electrical apparatus lacks temperature measuring device, leads to the trouble because the temperature rise is on the high side easily.

The main circuit of the switching device can work only when being connected into the circuit through the external lead, and if the connected circuit works in an overload mode or the connection is abnormal, factors such as the wire diameter, the material and the working environment of the external lead and the loose connection of the connection lead to the high temperature rise of the main circuit of the switching device.

The long-time temperature rise can cause great reduction of mechanical property and insulating property of the material, and can cause insulation damage between phases and burning loss of a switching device In serious cases, and particularly, when overload current of more than or equal to 1.3In rated current exists In a circuit, the aging of the insulating material In a route can be accelerated.

Because the internal structure of the switching device is compact, and the insulation requirement is high, the temperature measuring device is difficult to be added in the switching device, and if the temperature rise of the switching device is too high and the temperature cannot be rapidly and accurately checked, the switching device can be failed and failed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a temperature measuring device simple structure, reliability are high.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a temperature measuring device, its includes insulating boot and detection unit, the one end of insulating boot is equipped with the blind hole that is used for holding the detection unit, and the insulating boot other end is the closed end face, and the detection unit is installed in the blind hole of insulating boot.

Preferably, the side wall of one side of the insulating cover provided with the blind hole protrudes to form an insulating table, and the insulating table is higher than the blind hole to form a yielding opening for limiting the installation of the temperature measuring device and avoiding a wire harness connected with the detection unit.

Preferably, the insulating cover is a cylinder structure with one closed end.

Preferably, the insulation table is of a cylindrical structure, a second blind hole for mounting a spring is formed in the middle of the insulation table, a U-shaped groove is formed in one end of the insulation table, and the U-shaped groove is inserted into the limiting detection unit on the side wall of one end of the insulation cover.

Preferably, the detection unit comprises a detection circuit board and a detection triode arranged on the detection circuit board.

Preferably, the detection unit further comprises a heat conduction insulation sealing layer arranged in the blind hole, and the heat conduction insulation sealing layer wraps around the detection unit.

The utility model discloses a temperature measuring device, the detection unit sets up in the blind hole of insulating boot, makes insulating casing can promote the one end that the insulating boot was equipped with the blind hole, and the terminal surface that is used for insulating detection unit with the insulating boot is spacing in insulating casing, and not only small, insulating nature is good, but also has the characteristics of the assembly of being convenient for.

The utility model also provides a switching device, including the insulating casing that inferior valve and epitheca are constituteed to and at least one main loop unit of setting in the insulating casing, every main loop unit includes two binding post respectively, at least one binding post with temperature measuring device cooperation, inferior valve or epitheca can promote the one end that the insulating boot is equipped with the blind hole, it is spacing on the binding post that corresponds to compress tightly the other end that the insulating boot is equipped with the blind hole, temperature measuring device passes through the pencil and is connected with the control unit.

Preferably, the terminal block comprises a wiring board and a wiring screw, the wiring screw presses the external lead on the wiring board, and the insulating cover is limited between the wiring board and the lower shell.

Preferably, the lower casing comprises a base and an insulating bottom plate, the base is arranged between the insulating bottom plate and the upper casing, the at least one main circuit unit is arranged on the inner side of the base far away from the insulating bottom plate, an insulating through hole is formed in the position, corresponding to the wiring terminal, of the base, and the closed end face of one end of the insulating cover penetrates through the insulating through hole to be matched with the wiring board.

Preferably, the base is provided with a wiring hole penetrating through the base, and the wiring harness penetrates through the wiring hole from the outer side of the base and is connected with the control unit in the insulating shell; the wiring groove used for limiting the wiring harness is arranged on the outer side, facing the insulating bottom plate, of the base, and the insulating bottom plate is connected with the base and shields the insulating through hole, the wiring hole and the wiring groove.

Preferably, the control unit comprises a main chip, and a temperature measuring device connecting terminal, a 485 communication terminal and an HPLC power line carrier communication terminal which are connected with the main chip; the temperature measuring device is connected with the connecting terminal of the temperature measuring device through a wire harness, and the main chip transmits an alarm signal to an external alarm or a control system through a 485 communication terminal and/or an HPLC power line carrier communication terminal.

The utility model discloses a switching apparatus, the terminal surface that the insulating boot is used for insulating detection unit compresses tightly spacing on the binding post that corresponds, and it is more nearly not only to let detection unit to binding post's distance in the insulating boot, and when the wiring leads to the temperature rise unusually, detection unit can be quick, accurate response binding post's temperature rise.

In addition, the switch electric appliance is provided with an insulation through hole at a position corresponding to the wiring terminal on the base, the temperature measuring device is installed from the outer side of the base, the wiring groove is formed in the outer side of the base, the wiring hole penetrating through the base is insulated through the additionally arranged insulation bottom plate, the structure is convenient to assemble, wiring is standard, and the structure is compact.

Drawings

FIG. 1 is a schematic structural view of a temperature measuring device according to an embodiment of the present invention;

FIG. 2 is an exploded view of a temperature measuring device according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of an insulation cover according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a control unit according to an embodiment of the present invention;

fig. 5 is a circuit diagram of a control unit according to an embodiment of the present invention;

fig. 6 is a cross-sectional view of a switching device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a main loop unit according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of the side of the base facing the insulating base plate according to the embodiment of the present invention;

fig. 9 is a schematic structural diagram of an insulating base plate according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a side of the base of the embodiment of the present invention, which is away from the insulating bottom plate.

Detailed Description

The following describes a specific embodiment of the temperature measuring device according to the present invention with reference to the embodiments shown in fig. 1 to 10. The temperature measuring device of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-3, the utility model discloses a temperature measuring device includes insulating boot 100, detecting element 200 and the pencil 400 that is used for connecting detecting element 200 and the control unit 300, the one end of insulating boot 100 is equipped with the blind hole 110 that is used for holding detecting element 200, the insulating boot 100 other end is used for insulating detecting element 200 for the closed end face terminal surface, detecting element installs in the blind hole 110 of insulating boot, insulating boot 100 is equipped with the one end installation detecting element 200 of blind hole 110, and can be used for cooperating with switch electrical apparatus's insulating casing 500, insulating casing 500 can promote the one end that insulating boot 100 was equipped with blind hole 110, spacing the terminal surface of the insulating boot 100 other end in insulating casing 500.

The utility model discloses a temperature measuring device, detection unit 200 sets up in the blind hole 110 of insulating boot 100, a portion 410 of bending for connecting the pencil 400 bending formation of detection unit 200 dodges insulating casing 500, set up the opening 420 of stepping down that is used for dodging portion 410 of bending simultaneously on insulating boot 100, make insulating casing 500 can promote the one end that insulating boot 100 was equipped with blind hole 110, the terminal surface that is used for insulating detection unit 200 with insulating boot 100 is spacing in insulating casing 500, and is not only small, insulating nature is good, but also has the characteristics of the assembly of being convenient for.

Further, the protruding insulating platform 120 that forms of lateral wall on one side of insulating boot 100, insulating platform 120 are higher than blind hole 110, make blind hole 110 and insulating casing 500 interval form and let a position opening 420 for temperature measuring device installation is spacing and dodge the pencil 400 of being connected with detecting element 200, make blind hole 110 and insulating casing 500 interval form through the insulating platform 120 that is higher than blind hole 110 and let a position opening 420, can avoid reducing and directly set up on the lateral wall of blind hole 110 and let a position opening 420 and reduce insulating properties of insulating boot 100. The wiring harness 400 comprises a bending portion 410 which is formed by bending in a direction perpendicular to the depth direction of the blind hole 110 and used for avoiding the insulating shell 500, one end of the bending portion 410 is connected with the detection unit 200, and the insulation cover 100 is provided with a yielding opening 420 at one end of the blind hole 110 and used for avoiding the bending portion 410. Of course, also can directly set up the opening of stepping down 420 on the lateral wall of blind hole 110, perhaps set up the groove that is used for dodging the portion 410 of bending on insulating casing 500, be equipped with the fixed station that is used for spacing insulating boot 100 on insulating casing 500 for example, set up the groove that is used for dodging the portion 410 of bending in the fixed station, all belong to the utility model discloses a protection scope.

Further, a spring (not shown) connected between the insulation stage 120 and the insulation housing 500 is further included. The insulation housing 500 pushes the insulation table 120 through a spring, and then the acting force for pushing the insulation cover 100 is larger, so that the insulation cover 100 is more reliably limited.

Further, the insulation cover 100 is a cylinder structure with one closed end, the insulation table 120 is a cylinder structure, one side of the insulation table 120 is located in the blind hole 110, the other side of the insulation table 120 is located outside the blind hole 110, a second blind hole 121 is arranged in the middle of the insulation table 120, one end of the spring is inserted into the second blind hole 121, and the other end of the spring abuts against the insulation housing 500. Of course, the insulating stage 120 may also be a rod-shaped structure, so that one end of the spring is sleeved on the insulating stage 120, which all belongs to the protection scope of the present invention. Preferably, the insulation table 120 is a cylindrical structure, and one end of the insulation table 120 is provided with a U-shaped groove, and the U-shaped groove is inserted into the limit detection unit 200 on the side wall of one end of the insulation cover 100. The insulation blocks 120 have outer and inner diameters that are smaller than the outer and inner diameters of the insulation cover 100.

Further, the probing unit 200 includes a probing circuit board 210 and a detecting transistor 220 disposed on the probing circuit board 210, and the detecting transistor 220 detects a forward voltage drop of a PN junction of the detecting transistor 220 along with a temperature change, so that the control unit 300 can calculate a temperature according to an electrical signal of the detecting transistor 220.

Further, the detection unit 200 further includes a heat conduction insulation sealing layer disposed in the blind hole 110, and the heat conduction insulation sealing layer wraps around the detection unit 200. The thermal conductive insulating seal wraps around the probe circuit board 210 and the detection transistor 220 (not shown). Preferably, the heat-conducting insulating sealing layer is heat-conducting silica gel which has the characteristics of high insulating property and good heat-conducting property. Of course, the heat-conducting insulating sealing layer can also be made of other materials with high insulating property and good heat-conducting property, and the utility model discloses a protection scope.

As shown in fig. 4, the control unit 300 includes a measurement board 301, a communication board 303, a liquid crystal display panel 306, and a power board 307, wherein the measurement board 301 is provided with a temperature measurement device connection terminal 302, the communication board 303 is provided with a 485 communication terminal 304, and the liquid crystal display panel 306 is provided with an HPLC power line carrier communication terminal 305.

The other end of the wiring harness 400 connected with the detection unit 200 is connected with the temperature measuring device connecting terminal 302 on the measuring plate 301 through a terminal, and is used for transmitting the electric signal of the detection unit 200, and the control unit 300 calculates the temperature of the working environment according to the electric signal of the detection unit 200;

if the working environment temperature is higher than the preset value, the control unit 300 transmits an alarm signal to an external alarm or a control system through a 485 communication terminal 304 on the communication board 303 or an HPLC power line carrier communication terminal 305 on the liquid crystal display panel 306.

As a temperature calculation method, the control unit 300 includes a temperature measuring chip U18 and a main chip (not shown) as shown in the circuit diagram of FIG. 5, the detection transistor 220 sends a voltage signal to the temperature measuring chip U18, and then the voltage signal passes through I²And C, transmitting the data to a main chip, and compensating a temperature curve by the main chip through a software algorithm to match the detected temperature with the actual temperature. The main chip is a microprocessor MCU.

As another temperature calculation method, the detection transistor 220 directly transmits the voltage signal to the ADC sampling port of the main chip, and then performs temperature compensation calculation through a software algorithm. The main chip is a microprocessor MCU. As shown in fig. 6-10, the utility model also provides a switching device with the temperature measuring device.

The utility model discloses an electrical apparatus for switch includes the insulating housing 500 that inferior valve 510 and epitheca 520 are constituteed to and set up at least one major loop unit 600 in insulating housing 500, every major loop unit 600 includes two binding post 610 respectively, wherein at least one binding post 610 with the temperature measuring device cooperation, inferior valve 510 or epitheca 520 can promote the one end that insulating boot 100 was equipped with blind hole 110, and it is spacing on the binding post 610 that corresponds to compress tightly the terminal surface that insulating boot 100 was used for insulating detection unit 200.

The utility model discloses a switching apparatus includes the casing that inferior valve and epitheca are constituteed to and set up at least one major loop unit in the casing, every major loop unit includes two binding post respectively, and wherein at least one binding post is equipped with temperature measuring device in one side towards inferior valve or epitheca, and temperature measuring device includes insulating mechanism and sets up the detection mechanism in insulating mechanism, and inferior valve or epitheca can compress tightly insulating mechanism on binding post after the assembly.

The utility model discloses a switch apparatus, the terminal surface that insulating boot 100 is used for insulating detection unit 200 compresses tightly on corresponding binding post 610 spacingly, not only lets detection unit 200 in the insulating boot 100 more closely to binding post 610's distance, and when the wiring leads to the temperature rise unusually, detection unit 200 can be fast, accurate response binding post 610's temperature rise.

Specifically, the switching device of this embodiment is a circuit breaker, the circuit breaker includes three main circuit units 600, each main circuit unit 600 includes two wiring terminals 610, a moving contact and a stationary contact, and the two wiring terminals 610 of each group of main circuit units 600 are an incoming terminal and an outgoing terminal respectively; the handle is connected with the movable contact through an operating mechanism, and the control unit 300 is arranged in the shell and positioned above the movable contact and on one side of the operating mechanism.

The temperature measuring device comprises six insulating covers 100 and detection units 200 respectively arranged in the insulating covers 100, the six detection units 200 correspond to two wiring terminals 610 of three main loop units 600 one by one, and each detection unit 200 is connected with the same control unit 200 through a wiring harness 400. It should be understood that the number of the detecting units 200 may be different from six, and the detecting unit 200 may be provided only at the incoming line end or the detecting unit 200 may be provided only at the outgoing line end.

The terminal 610 includes a terminal board 611 and a terminal screw 612, the terminal screw 612 presses the external wire onto the terminal board 611, the insulation cover 100 is limited between the terminal board 611 and the lower shell 510, one end of the insulation cover 100 provided with the blind hole 110 is matched with the lower shell 510, and the other end of the insulation cover 100 provided with the blind hole 110 is matched with the side surface of the terminal board 611 facing the lower shell 510. It is understood that the insulation cover 100 may be limited between the upper shell 510 and the wiring board 611, which falls within the protection scope of the present invention.

Further, the lower casing 510 includes a base 511 and an insulating bottom plate 512, the base 511 is a half-box structure opened on one side of the upper casing 520, the insulating bottom plate 512 is disposed on the outer side of the base 511, the base 511 is disposed between the insulating bottom plate 512 and the upper casing 520, the at least one main circuit unit 600 is disposed on one side of the base 511, which is far away from the insulating bottom plate 512, an insulating through hole 513 is disposed on the base 511, the insulating boss 120 of the insulating cover 100 contacts with the insulating bottom plate 512, a yielding opening 420 for avoiding the wiring harness 400 is formed between one end of the insulating cover 100, which is provided with the blind hole 110, and the insulating bottom plate 512, and a closed end face of the other end of the insulating cover 100 passes through the insulating through hole 513. The insulation boss 120 is in contact with the insulation bottom plate 512 to form a yielding opening 420 for avoiding the wiring harness 400, so that the contact and matching of the closed end face at the other end of the insulation cover 100 and the wiring board 611 are ensured, the insulation cover 100 can be supported on the wiring board 611, and the temperature measurement signal is more accurate.

Further, a spring is arranged in the second blind hole 121 of the insulating boss 120, extends out of the second blind hole 121 and abuts against the insulating bottom plate 512, so that the closed end face of the other end of the insulating cover 100 can be more reliably pressed on the wiring board 611, and the contact is prevented from being untight or the insulating cover is shaken to fall off.

Further, a wiring hole 430 penetrating the base 511 for avoiding the harness 400 is provided in the base 511, and the harness 400 is connected to the control unit 300 in the insulating housing 500 through the wiring hole 430 from the outside of the base 511.

Further, a wiring groove 440 for limiting a wiring harness is arranged on the outer side face of the base 511 facing the insulating bottom plate 512, the wiring groove 440 corresponds to the space between two adjacent main circuit units 600, and the insulating bottom plate 512 and the base 511 are connected to shield the insulating through hole 513, the wiring hole 430 and the wiring groove 440, so that a protection effect is achieved.

Further, the insulating through hole 513 is in interference fit with the insulating cover 100, so that the fixing effect on the insulating cover 100 is improved.

The utility model discloses a switch apparatus corresponds binding post 610's position on base 511 and is equipped with insulating through-hole 513, from the installation temperature measuring device in the base 511 outside, and sets up trough 440 in the outside of base 511 to and run through base 511's trough 430, insulate through the insulating bottom plate 512 who adds, this kind of structure convenient assembling, and walk the line standard, compact structure.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A temperature measuring device is characterized in that: including insulating boot (100) and detection unit (200), the one end of insulating boot (100) is equipped with blind hole (110) that are used for holding detection unit (200), and the insulating boot (100) other end is the closed end face, and the detection unit is installed in blind hole (110) of insulating boot (100).

2. The temperature measuring device according to claim 1, wherein: the side wall of one side of the insulating cover (100) provided with the blind hole (110) protrudes to form an insulating table (120), and the insulating table (120) is higher than the blind hole (110) to form an abdication opening (420).

3. The temperature measuring device according to claim 1, wherein: the insulating cover (100) is of a cylinder structure with one closed end.

4. The temperature measuring device according to claim 2, wherein: the insulation table (120) is of a cylindrical structure, a second blind hole (121) for mounting a spring is formed in the middle of the insulation table (120), a U-shaped groove is formed in one end of the insulation table (120), and the U-shaped groove is inserted into the upper limit detection unit (200) on the side wall of one end of the insulation cover (100).

5. The temperature measuring device according to claim 1, wherein: the detection unit (200) comprises a detection circuit board (210) and a detection triode (220) arranged on the detection circuit board (210).

6. The temperature measuring device according to claim 1, wherein: the detection unit (200) further comprises a heat conduction and insulation sealing layer arranged in the blind hole (110), and the heat conduction and insulation sealing layer wraps the periphery of the detection unit (200).

7. A switching apparatus, including insulating casing (500) that inferior valve (510) and epitheca (520) are constituteed to and set up at least one major loop unit (600) in insulating casing (500), every major loop unit (600) includes two binding post (610) respectively, its characterized in that: at least one connecting terminal (610) is matched with the temperature measuring device of any one of claims 1 to 6, one end of the insulating cover (100) provided with the blind hole (110) can be pushed by the lower shell (510) or the upper shell (520) to press the other end of the insulating cover (100) provided with the blind hole (110) to the corresponding connecting terminal (610) for limiting, and the temperature measuring device is connected with the control unit (300) through the wiring harness (400).

8. The switching device according to claim 7, characterized in that: the terminal block (610) includes a terminal block (611) and a terminal screw (612), the terminal screw (612) presses an external wire against the terminal block (611), and the insulating cover (100) is confined between the terminal block (611) and the lower case (510).

9. The switching device according to claim 7, characterized in that: the lower shell (510) comprises a base (511) and an insulating bottom plate (512), the base (511) is arranged between the insulating bottom plate (512) and the upper shell (520), at least one main loop unit (600) is arranged on the inner side, far away from the insulating bottom plate (512), of the base (511), an insulating through hole (513) is formed in the position, corresponding to the wiring terminal (610), of the base (511), and the closed end face of one end of the insulating cover (100) penetrates through the insulating through hole (513) to be matched with the wiring board (611).

10. The switching device according to claim 9, characterized in that: a wiring hole (430) penetrating through the base (511) is formed in the base (511), and a wiring harness (400) penetrates through the wiring hole (430) from the outer side of the base (511) and is connected with a control unit (300) in the insulating shell (500); the wiring structure is characterized in that a wiring groove (440) used for limiting a wiring harness (400) is formed in the outer side, facing the insulating bottom plate (512), of the base (511), and the insulating bottom plate (512) is connected with the base (511) to shield the insulating through hole (513), the wiring hole (430) and the wiring groove (440).

11. The switching device according to claim 7, characterized in that: the control unit (300) comprises a main chip, and a temperature measuring device connecting terminal (302), a 485 communication terminal (304) and an HPLC power line carrier communication terminal (305) which are connected with the main chip; the temperature measuring device is connected with the connecting terminal (302) of the temperature measuring device through a wire harness (400), and the main chip transmits an alarm signal to an external alarm or a control system through the 485 communication terminal (304) and/or the HPLC power line carrier communication terminal (305).