SF6 circuit breaker

Abstract

The utility model relates to an SF6 circuit breaker, and belongs to the field of circuit breakers. The SF6 circuit breaker comprises an SF6 circuit breaker body and a supporting device used for supporting the SF6 circuit breaker body, and further comprises a temperature measuring device which is arranged at the shady position of the SF6 circuit breaker body, is spaced from the SF6 circuit breaker body by a certain distance and is used for measuring the temperature of the environment where a gas chamber of the SF6 circuit breaker is located. According to the utility model, the measuring accuracy of the temperature measuring device of the heat tracing band temperature controller can be improved when the temperature measuring device measures the temperature of the environment where the circuit breaker air chamber is located, so that the heat tracing band can be opened in time, and the occurrence of safety accidents is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of SF6 circuit breakers, belong to circuit breaker field. BACKGROUND

[0002] SF6 gas in SF6 circuit breaker inside appears liquefaction phenomenon under low temperature working condition, leading to SF6 gas density reduction inside circuit breaker, insulation performance reduces, while circuit breaker appears low gas pressure alarm, seriously affect equipment safe operation and substation field operation and maintenance, therefore, need to increase circuit breaker gas chamber low temperature outer wrapping heating band on the outside of SF6 circuit breaker tank, when the environment temperature where SF6 circuit breaker gas chamber is at is detected by heating band temperature controller probe lower than preset value, SF6 circuit breaker gas inside is reduced by heating band temperature control loop control heating band heating circuit breaker gas chamber gas, to reduce the liquefaction phenomenon of SF6 gas in SF6 circuit breaker inside.

[0003] Figure 1 It is the installation position schematic diagram of existing heating band temperature controller probe, as shown in Figure 1 Figure 1 (a) in, (a) indicates the front view of the control cabinet 70, Figure 1 (b) in, (b) indicates the left view of the control cabinet 70, and the control cabinet 70 is a cuboid structure with a length of 3000 millimeters (mm), a width of 1000 mm and a height of 2400 mm, and the control cabinet 70 includes three box bodies, each of which has a lock handle, and each lock handle (i.e., lock handle 1, lock handle 2 and lock handle 3) can be used to open the corresponding box body, facilitating maintenance personnel to carry out maintenance. The right side of the control cabinet 70 is provided with a cabinet air conditioner 60 for cooling the control cabinet 70, and the outer brim of the control cabinet 70 is provided with a low-temperature environment sensor arrangement 50. The existing related technology usually installs the heating band temperature controller probe in the control cabinet 70 or at the low-temperature environment sensor arrangement 50 of the outer brim of the control cabinet 70.

[0004] ​In the prior art, when the heat tracing band temperature controller probe is installed in the control cabinet 70, various heat dissipation devices in the control cabinet 70 can cause the temperature detected by the heat tracing band temperature controller probe to be higher than the actual ambient temperature; when the heat tracing band temperature controller probe is installed at the low-temperature environment sensor arrangement 50 of the outer brim of the control cabinet 70, a heat insulation protective cover is added to the heat tracing band temperature controller probe, and since the outer brim is easily affected by light, heat is also accumulated in the protective cover, which can also cause the temperature detected by the heat tracing band temperature controller probe to be higher than the actual ambient temperature. Therefore, whether the heat tracing band temperature controller probe is installed in the control cabinet 70 or installed at the low-temperature environment sensor arrangement 50 of the outer brim of the control cabinet 70, the temperature detected by the heat tracing band temperature controller probe is higher than the actual ambient temperature, that is, the heat tracing band temperature controller probe is inaccurate, which can cause the heat tracing band to not start when the heat tracing band is started, the heat tracing band fails to play a role, and further cause the SF6 gas in the circuit breaker to be liquefied. Practical new type content

[0005] The purpose of the present application is to provide an SF6 circuit breaker to solve the problem of inaccurate measurement of the temperature of the environment in which the gas chamber of the circuit breaker is located by the heat tracing band temperature controller probe in the prior art.

[0006] To achieve the above purpose, the scheme of the present application comprises:

[0007] The SF6 circuit breaker of the present application comprises an SF6 circuit breaker body, a supporting device for supporting the SF6 circuit breaker body, and a temperature measuring device of a heat tracing band temperature controller arranged at a shaded position of the SF6 circuit breaker body and spaced apart from the SF6 circuit breaker body by a certain distance, and used for measuring the ambient temperature of the gas chamber of the SF6 circuit breaker.

[0008] Further, the temperature measuring device is arranged on the supporting device at the shaded position of the SF6 circuit breaker body.

[0009] Further, the temperature measuring device is arranged directly below the SF6 circuit breaker body and spaced apart from the SF6 circuit breaker body by a certain distance.

[0010] Further, the temperature measuring device comprises a first probe and a second probe.

[0011] The first probe is used for measuring the ambient temperature of the gas chamber of the SF6 circuit breaker.

[0012] The second probe is used for taking over the work of the first probe when the first probe is damaged.

[0013] Further, the temperature measuring device further comprises a louver box.

[0014] The first probe and the second probe are arranged in the louver box.

[0015] Further, the temperature measuring device further comprises a low-temperature probe mounting box for protecting the terminal of the first probe and the second probe.

[0016] The low-temperature probe mounting box is provided with a first opening and a second opening at the bottom thereof.

[0017] The first probe is connected to the first opening, and the second probe is connected to the second opening.

[0018] Further, a bolt matched with the thread of the first probe is arranged on the first opening, and a bolt matched with the thread of the second probe is arranged on the second opening.

[0019] Further, the temperature measuring device is arranged on the support device through the mounting bracket.

[0020] Further, the temperature measuring device and the mounting bracket are connected through the stud.

[0021] Further, the first probe and the second probe are both PT100 temperature sensors.

[0022] The SF6 circuit breaker provided by the utility model has the advantages that as an improved invention, the utility model provides an SF6 circuit breaker, which comprises an SF6 circuit breaker body and a support device for supporting the SF6 circuit breaker body, and further comprises a temperature measuring device of a heat tracing band temperature controller, which is arranged at a shaded position of the SF6 circuit breaker body and is spaced apart from the SF6 circuit breaker body by a certain distance and is used for measuring the ambient temperature of a gas chamber of the SF6 circuit breaker. The temperature measuring device of the heat tracing band temperature controller is arranged at a shaded position of the shaded surface of the SF6 circuit breaker body and is spaced apart from the SF6 circuit breaker body by a certain distance, compared with the prior art, on the one hand, the temperature measuring device of the heat tracing band temperature controller can be far away from the heat-dissipating components in the control cabinet, thereby reducing the influence of heat dissipation of the heat-dissipating components on the temperature measuring device of the heat tracing band temperature controller; on the other hand, the temperature measuring device of the heat tracing band temperature controller can avoid direct sunlight, thereby reducing the influence of sunlight on the temperature measuring device of the heat tracing band temperature controller during detection. The accuracy of measurement of the temperature measuring device of the heat tracing band temperature controller when measuring the ambient temperature of the gas chamber of the circuit breaker is improved, the heat tracing band can be timely opened, and the occurrence of safety accidents is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic view of the mounting position of a probe of a heat tracing band temperature controller in the prior art;

[0024] Figure 2 is a structural schematic view of an SF6 circuit breaker provided by an embodiment of the utility model;

[0025] Figure 3 is a structural schematic view of a low-temperature probe mounting box provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear and apparent, the utility model will be further explained in detail below in combination with the drawings and examples.

[0027] The utility model discloses the conception lies in: in guaranteeing that the temperature controller probe of heat tracing zone can detect the ambient temperature of the air chamber of circuit breaker, let the temperature controller probe of heat tracing zone be away from the environment that influences the detection accuracy of the temperature controller probe of heat tracing zone.

[0028] Specifically: including SF6 circuit breaker body and be used for supporting SF6 circuit breaker body's support device, still include setting in the SF6 circuit breaker body's shady place and with the SF6 circuit breaker body interval certain distance, be used for measuring the ambient temperature of the air chamber of SF6 circuit breaker's heat tracing zone temperature controller's temperature measuring device.

[0029] An embodiment of SF6 circuit breaker:

[0030] Figure 2 It is a kind of SF6 circuit breaker structure schematic diagram provided by the utility model embodiment, as shown in Figure 2 The SF6 circuit breaker includes: SF6 circuit breaker body 10 and support device 80 for supporting SF6 circuit breaker body 10, and temperature measuring device 20 of heat tracing zone temperature controller for measuring the ambient temperature of the air chamber of SF6 circuit breaker is further included, and the temperature measuring device 20 is arranged at the shady place of SF6 circuit breaker body 10 and is spaced apart from SF6 circuit breaker body 10 by certain distance.

[0031] Wherein, temperature measuring device 20 can be directly arranged on the support device 80 at the shady place of SF6 circuit breaker body 10, can also be arranged on the support device 80 at the shady place of SF6 circuit breaker body 10 by mounting bracket 30, can also not be arranged on the support device 80, by using first support structure (not shown) support temperature measuring device 20, first support structure is placed at the shady place of SF6 circuit breaker body 10 and is located at the side of SF6 circuit breaker body 10, etc., the utility model does not make special limitation to this, in order to simplify installation process, subsequent temperature measuring device 20 is arranged on the support device 80 at the shady place of SF6 circuit breaker body 10 by mounting bracket 30 as an example, carries out exemplary explanation.

[0032] As an optional implementation, the temperature measuring device 20 can be not fixed in position when located at the shady place of the SF6 circuit breaker body 10, and can be adjusted in position according to the latitude, longitude and the direction and duration of the sun's irradiation. In order to save manpower, as another optional implementation, the temperature measuring device 20 can be directly arranged under the SF6 circuit breaker body 10. When the temperature measuring device 20 is arranged under the SF6 circuit breaker body 10, the first supporting structure can be arranged under the SF6 circuit breaker body 10 through the mounting bracket 30, or the first supporting structure can be arranged under the SF6 circuit breaker body 10.

[0033] Wherein, when the temperature measuring device 20 is arranged on the supporting device 80 at the shady place of the SF6 circuit breaker body 10 through the mounting bracket 30, the mounting bracket 30 and the supporting device 80 can be fixedly connected or detachably connected, which is not particularly limited in the utility model; the temperature measuring device 20 and the mounting bracket 30 can be fixedly connected or detachably connected, which is not particularly limited in the utility model. In order to facilitate replacement, the mounting bracket 30 and the supporting device 80 are detachably connected, and the temperature measuring device 20 and the mounting bracket 30 are detachably connected in the subsequent embodiment, which is taken as an example for illustrative description.

[0034] Wherein, the detachable connection can be a connection relationship using a hinge, or a connection relationship using a stud, etc., which is not particularly limited in the utility model, and the connection relationship using a stud is taken as an example for illustrative description in the subsequent embodiment.

[0035] Wherein, the temperature measuring device 20 comprises a first probe and a second probe; the first probe is used for measuring the ambient temperature of the gas chamber of the SF6 circuit breaker; and the second probe is used for taking over the work of the first probe when the first probe is damaged. The redundant design of the double probes can ensure the normal use of the heat tracing band, and further reduce the occurrence of safety accidents.

[0036] Wherein, the types of the first probe and the second probe are not particularly limited in the utility model, and the first probe and the second probe both use PT100 temperature sensors in the subsequent embodiment of the utility model, which is taken as an example for illustrative description.

[0037] In order to reduce the damage of the natural environment (such as wind, rain or snow, etc.) to the probe and improve the service life of the probe, as an optional implementation, the temperature measuring device 20 further comprises a louver box. The louver box is connected to the supporting device 80 through the mounting bracket 30, and is located under the SF6 circuit breaker body 10.

[0038] When the temperature measuring device 20 further comprises the louvre box, the first probe and the second probe are both located in the louvre box and used for detecting the box temperature in the louvre box, and the box temperature in the louvre box can be considered to be close to the ambient temperature of the gas chamber of the SF6 circuit breaker.

[0039] In order to reduce the damage of the first probe and the second probe line and to reduce the occurrence of the invalidation of the first probe and the second probe, and to make the measured temperature more accurate, as an optional implementation, the temperature measuring device 20 further comprises a low-temperature probe mounting box for protecting the terminal of the first probe and the second probe; the bottom of the low-temperature probe mounting box is provided with a first opening 40C1 (not shown) and a second opening 40C2 (not shown). The low-temperature probe mounting box is connected and supported by the mounting bracket 30 of the support device 80 and is located directly below the SF6 circuit breaker body 10.

[0040] When the temperature measuring device 20 further comprises the low-temperature probe mounting box, the first probe is connected to the first opening, the second probe is connected to the second opening, the first probe and the second probe are exposed from the box body, and the temperature sensing part is completely exposed to the external environment.

[0041] In order to facilitate the replacement of the probe, as an optional implementation, bolts (not shown) matched with the threads of the first probe 40C1 can be arranged on the first opening 40C1, and bolts (not shown) matched with the threads of the second probe 40C2 can be arranged on the second opening 40C2.

[0042] The structure of the low-temperature probe mounting box 20 can refer to Figure 3 , Figure 3 is a structure schematic view of a low-temperature probe mounting box provided by the embodiment of the utility model, as Figure 3 shown, Figure 3 (a) in the figure indicates the left view of the low-temperature probe mounting box 20, Figure 3 (b) in the figure indicates the front view of the low-temperature probe mounting box 20, Figure 3 (c) in the figure indicates the bottom view of the low-temperature probe mounting box 20, Figure 3 (d) in the figure indicates the front view after the cabinet door of the low-temperature probe mounting box is opened.

[0043] As Figure 3 known, the length of the low-temperature probe mounting box 20 provided by the embodiment of the utility model is 150 mm, the width is 100 mm, and the height is 150 mm; the first opening 40C1, the second opening 40C2 and the cable wiring hole 40B are arranged at the bottom of the low-temperature probe mounting box 20, and the bottom of the low-temperature probe mounting box 20 is further used for mounting the grounding terminal 40E. The first stud 40A1 and the second stud 40A2 (not shown) for connecting the mounting bracket 30 are arranged at the back of the low-temperature probe mounting box 20. The wiring row 40D is arranged in the low-temperature probe mounting box 20, facilitating the cable wiring.

[0044] The diameter of the first opening 40C1 and the second opening 40C2 is 10 mm, the diameter of the cable wiring hole 40B is 33 mm, and the tolerance is 0.5 mm; the center of the first opening 40C1 is 50 mm away from the long side of the bottom of the cryogenic probe mounting box 20 and 50 mm away from the wide side of the bottom; the center of the second opening 40C2 is 75 mm away from the long side of the bottom of the cryogenic probe mounting box 20 and 75 mm away from the wide side of the bottom; the center of the cable wiring hole 40B is 35 mm away from the long side of the bottom of the cryogenic probe mounting box 20 and 30 mm away from the wide side of the bottom; the length of the first stud 40A1 and the second stud 40A2 is 50 mm, the center position is 75 mm away from the ground, the first stud 40A1 and the second stud 40A2 are located on both sides of the wiring row 40D and are symmetrical to each other, the center position of the first stud 40A1 is 25 mm away from the left side wall of the cryogenic probe mounting box 20, and the center position of the second stud 40A2 is 25 mm away from the right side wall of the cryogenic probe mounting box 20; the height of the grounding terminal 40E is 25 mm, and the wide side of the bottom is 25 mm.

[0045] The SF6 circuit breaker provided by the embodiment of the utility model, comprising SF6 circuit breaker body and support device for supporting SF6 circuit breaker body, still include setting in SF6 circuit breaker body's back sun place and with SF6 circuit breaker body interval certain distance, for measuring SF6 circuit breaker's gas chamber in ambient temperature's heat tracing band temperature controller's temperature measuring device. Through install heat tracing band temperature controller's temperature measuring device in SF6 circuit breaker body's back sun surface back sun place and with SF6 circuit breaker body interval certain distance, compared with prior art: on one hand, can be away from the heat dissipation component in the control cabinet, reduce the influence of heat dissipation component's heat dissipation on heat tracing band temperature controller's temperature measuring device, on the other hand, can avoid the direct sunlight to heat tracing band temperature controller's temperature measuring device, reduce the influence on heat tracing band temperature controller's temperature measuring device when detecting. Improved heat tracing band temperature controller's temperature measuring device when measuring the accuracy of the ambient temperature of circuit breaker gas chamber, can make heat tracing band open in time, reduce the occurrence of safety accidents.

Claims

1. An SF6 circuit breaker comprising an SF6 circuit breaker body and a support device for supporting the SF6 circuit breaker body, characterized in that, The temperature measuring device comprises a first probe and a second probe.

2. The SF6 circuit breaker of claim 1, wherein, The first probe is used for measuring the ambient temperature of the SF6 circuit breaker.

3. The SF6 circuit breaker of claim 1, wherein, The second probe is used for replacing the first probe when the first probe is damaged.

4. The SF6 circuit breaker according to claim 2 or 3, characterized in that The temperature measuring device further comprises a louver box. The first probe and the second probe are placed in the louver box. The temperature measuring device further comprises a low-temperature probe mounting box for protecting the connection terminals of the first probe and the second probe.

5. The SF6 circuit breaker of claim 4, wherein, The low-temperature probe mounting box is provided with a first opening and a second opening at the bottom. The first probe is connected to the first opening, and the second probe is connected to the second opening.

6. The SF6 circuit breaker of claim 4, wherein, A bolt matched with the thread of the first probe is arranged on the first opening, and a bolt matched with the thread of the second probe is arranged on the second opening. The temperature measuring device is arranged on the support device through a mounting bracket. The temperature measuring device is connected with the mounting bracket through a stud.

7. The SF6 circuit breaker of claim 6, wherein, The first probe and the second probe are both PT100 temperature sensors.

8. The SF6 circuit breaker of claim 2, wherein, ​ 9. The SF6 circuit breaker of claim 8, wherein, ​ 10. The SF6 circuit breaker of claim 4, wherein, ​

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