Switching device

Abstract

The utility model relates to the technical field of electric control equipment, in particular to a switching device, which comprises a shell assembly provided with a plurality of end faces, an arc extinguish chamber and at least one exhaust channel are arranged in the shell assembly, the exhaust channel is used for exhausting charged gas in the arc extinguish chamber out of the shell assembly, and the end faces of the end faces of the shell assembly are communicated with the arc extinguish chamber. When the switching device is installed, the direction facing an installed object is defined as the bottom, the end face, facing the bottom, of the shell assembly is defined as the lower end face, and the exhaust port at the tail end of the exhaust channel is formed in the lower end face of the shell assembly. According to the utility model, the exhaust port of the exhaust channel is arranged on the lower end face of the switching device, and electrified gas can be prevented from splashing to peripheral devices after installation, so that the safety of the peripheral devices is improved, and the problem that in the prior art, the exhaust port of the switching device is arranged on the side face of the switching device, so that the peripheral devices are greatly influenced is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric control equipment, concretely relates to a switch device. BACKGROUND

[0002] The switch device refers to the switch device in the term and definition of GB / T 5226.1-2019 / IEC 60204-1:2016, that is, the electric appliance for turning on or off the current of one or several circuits, and the specific element form can be a circuit breaker, a relay, a disconnector and the like. Among them, the arc extinguishing chamber in the switch device is used to eliminate the arc generated between the moving contact and the static contact, and the ionized gas and the residual ionized arc formed after arc extinguishing are discharged to the outside of the switch device through the exhaust passage. The exhaust port at the end of the existing exhaust passage is usually arranged on the side of the switch device, and the ionized gas and the ionized arc discharged from the exhaust port have a greater impact on the peripheral devices, thereby reducing the safety performance of the switch device and the peripheral devices. Secondly, the existing exhaust passage has many inflection points, so that the airflow has a large loss in the exhaust passage, which is not conducive to the discharge of the ionized gas and the ionized arc and the cooling of the arc extinguishing chamber, and has the risk of arc reignition. SUMMARY

[0003] The utility model aims at providing a switch device to solve the problem that the exhaust port arranged on the side of the switch device has a greater impact on the peripheral devices.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a switch device, comprising a shell assembly provided with a plurality of end faces, an arc extinguishing chamber and at least one exhaust passage are arranged in the shell assembly, the exhaust passage is used to discharge the charged gas in the arc extinguishing chamber to the outside of the shell assembly, the direction of the switch device towards the installed object during installation is defined as the bottom, the end face of the shell assembly towards the bottom is the lower end face, and the exhaust port at the end of the exhaust passage is arranged on the lower end face of the shell assembly.

[0005] In one embodiment, the exhaust port is located in the middle of the lower end face.

[0006] In one embodiment, the lower end face of the shell assembly is provided with a flange extending downward.

[0007] In one embodiment, the flange is arranged around or partially around the exhaust port, so that the flange forms an extension air channel.

[0008] In one embodiment, the flange is partially arranged around the exhaust port, and the side wall of the extension air channel is formed with a notch.

[0009] In one embodiment, the exhaust passage extends to the lower end surface of the housing assembly in a downward or obliquely downward trend.

[0010] In one embodiment, the housing assembly comprises a first base body provided with a first mounting opening for forming a part of the arc extinguishing chamber, and the first mounting opening penetrates through the first base body, the direction in which the first mounting opening penetrates through the first base body is defined as a left-right direction, and the exhaust passages are multiple, and the multiple exhaust passages are respectively located on the left side or the right side of the first base body.

[0011] In one embodiment, the direction perpendicular to the left-right direction on the horizontal plane is defined as a front-rear direction, the exhaust passage comprises a first exhaust passage and a second exhaust passage communicated with the outlet side of the arc extinguishing chamber, the first exhaust passage and the second exhaust passage are respectively located on the left side and the right side of the first base body, the air inlet of the first exhaust passage is higher than that of the second exhaust passage, and the second exhaust passage has more bending relative to the first exhaust passage.

[0012] In one embodiment, the first exhaust passage comprises a first exhaust section and a second exhaust section along the airflow direction, the first exhaust section extends downward from the side wall of the first mounting opening and towards the edge of the first base body in the front-rear direction, the second exhaust section extends downward from the end of the first exhaust section and towards the middle of the first base body in the front-rear direction, and the end of the second exhaust section forms the air outlet of the first exhaust passage; the second exhaust passage comprises a third exhaust section, a fourth exhaust section and a fifth exhaust section along the airflow direction, the third exhaust section extends downward from the side wall of the first mounting opening, the fourth exhaust section extends from the end of the third exhaust section towards the middle of the first base body in the front-rear direction, and the fifth exhaust section extends downward from the end of the fourth exhaust section, and the end of the fifth exhaust section forms the air outlet of the second exhaust passage.

[0013] In one embodiment, the exhaust passage further comprises a third exhaust passage, and the third exhaust passage is divided into two parts in the front-rear direction, so as to increase the cross-sectional area of the third exhaust passage and improve the exhaust efficiency.

[0014] In one embodiment, the switch electric appliance is a double-pole circuit breaker.

[0015] The utility model has the advantages that:

[0016] 1. The air outlet of the exhaust passage is arranged at the lower end surface of the switch electric appliance, which can prevent the electrified gas from splashing to the peripheral devices after installation, thereby improving the safety of the peripheral devices.

[0017] 2、The extension air channel is arranged around the exhaust port, so that the charged gas discharged from the exhaust channel can be discharged through the gap of the extension air channel side wall and the end of the extension air channel respectively, the charged gas is dispersed, and the safety of the surrounding devices is further improved.

[0018] 3、Each exhaust channel extends in a downward or oblique downward trend, so that the bending of the exhaust channel can be reduced, the airflow loss is reduced, the charged gas can be quickly discharged to the switch electric appliance, arc reignition is prevented, and the temperature of the arc extinguishing chamber is reduced.

[0019] 4、The height of the air inlet of the second exhaust channel is lower than that of the air inlet of the first exhaust channel, and the exhaust outlets of the two exhaust channels are located on the lower end surface of the switch electric appliance, the second exhaust channel is arranged to be more bent, the length of the second exhaust channel can be prolonged, and the airflow can be accelerated to discharge the charged gas sufficiently. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a perspective view of an embodiment of the utility model.

[0021] Figure 2 is an exploded view of an embodiment of the utility model.

[0022] Figure 3 is a front view of an embodiment of the utility model.

[0023] Figure 4 is a left view of an embodiment of the utility model without the first side cover.

[0024] Figure 5 is Figure 3 A-A sectional view of.

[0025] Figure 6 is an installation state view of an embodiment of the utility model.

[0026] Wherein: 10 arc extinguishing chamber, 11 first side cover, 12 second side cover, 13 first base body, 131 first mounting port, 14 second base body, 141 second mounting port, 142 mounting part, 20 exhaust channel, 201 exhaust outlet, 21 first exhaust channel, 211 first exhaust section, 212 second exhaust section, 22 second exhaust channel, 221 third exhaust section, 222 fourth exhaust section, 223 fifth exhaust section, 23 third exhaust channel, 24 extension air channel, 241 gap, 30 L pole conduction system, 40 N pole conduction system, 5 arc striking plate. DETAILED DESCRIPTION

[0027] To further illustrate the embodiments, the utility model provides has the drawing. These drawings are part of the utility model disclosure, which is mainly used to illustrate the embodiments, and can be combined with the related description of the specification to explain the operating principle of the embodiments. With reference to these contents, those skilled in the art should understand other possible embodiments and the advantages of the utility model. The components in the drawing are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0028] Reference Figures 1 to 6 The utility model discloses a kind of switch devices, more specifically a kind of double-pole circuit breaker, including the shell assembly with multiple end faces, shell assembly includes first side cover 11, second side cover 12, first base body 13 and second base body 14, first base body 13 and second base body 14 are arranged between first side cover 11 and second side cover 12, the multiple end faces of circuit breaker are formed by shell assembly, the appearance of the circuit breaker of this example is substantially rectangular, so it has six outer end faces. When installing the switch device, the direction of the object to be installed is defined as bottom, the direction of the bottom of the switch device is down, and the opposite direction is up, that is Figure 2 The Z2 direction shown in the figure is down, and the Z1 direction is up, and the end face of the shell assembly towards the bottom is the lower end face. When installing the circuit breaker of this example, the direction of the object to be installed is in the direction of the gravity of the circuit breaker, and in other embodiments, the direction of the object to be installed relative to the circuit breaker is different from the direction of gravity.

[0029] Among them, the object to be installed is the mounting bracket 100 of the circuit breaker, and the mounting bracket 100 and the upper cover 200 cooperate to form a mounting box body, and the circuit breaker is arranged in the mounting box body. The mounting box body is prior art, which will not be described here.

[0030] The shell assembly is provided with an arc extinguishing chamber 10 and a plurality of exhaust channels 20, and the exhaust channels 20 are used to exhaust the charged gas in the arc extinguishing chamber 10 to the outside of the shell assembly. The first base body 13 is provided with a first mounting port 131 for forming a part of the arc extinguishing chamber, and the first mounting port 131 penetrates the first base body 13. The second base body 14 is provided with a second mounting port 141, and the first mounting port 131 and the second mounting port 141 jointly form the arc extinguishing chamber 10. A plurality of arc extinguishing fins are arranged in the arc extinguishing chamber 10 to extinguish the electric arc entering the arc extinguishing chamber, and the ionized gas and the free electric arc remaining after the electric arc is extinguished (the ionized gas and the free electric arc form the charged gas mentioned above) are then exhausted through the exhaust channels 20.

[0031] The direction in which the first mounting port 131 penetrates the first base body 13 is defined as the left-right direction, Figure 2 The X 1- The X2 direction is the left-right direction. The direction perpendicular to the left-right direction on the horizontal plane is defined as the front-rear direction, Figure 2 The Y1-Y2 direction shown in the figure is the front-rear direction.

[0032] The circuit breaker of the example is a double-pole circuit breaker, the space enclosed by the first side cover 11 and the first base 13 is provided with an L-pole conducting system 30, the L-pole conducting system 30 is provided with at least one set of connection terminals for connecting a live wire, the opening or closing of the moving and static contacts of the L-pole conducting system 30 controls the on-off of the live wire connected to the L-pole conducting system 30. The space enclosed by the first base 13 and the second base 14 is provided with an N-pole conducting system 40, the N-pole conducting system 40 is also provided with at least one set of connection terminals for connecting a neutral wire, the opening or closing of the moving and static contacts of the N-pole conducting system 40 controls the on-off of the neutral wire connected to the N-pole conducting system 40.

[0033] The exhaust passage 20 is used for discharging the charged gas discharged from the arc extinguishing chamber 10 or the charged gas generated when the moving and static contacts are broken, and the exhaust port 201 at the end of the exhaust passage 20 is arranged at the lower end surface of the housing assembly. Arranging the exhaust port 201 of the exhaust passage 20 at the lower end surface of the circuit breaker can prevent the charged gas from splashing to the devices located around the circuit breaker after installation, thereby improving the safety of the devices around the circuit breaker.

[0034] Continuing to refer to Figures 1 to 6 As shown, further, the exhaust port 201 is located in the middle of the lower end surface, and compared with arranging the exhaust port 201 at the edge of the lower end surface, the example arranges the exhaust port 201 at the middle area, thereby prolonging the moving path of the charged gas after leaving the circuit breaker to the devices around the circuit breaker. It should be noted that the exhaust port 201 of the utility model is located in the middle of the lower end surface, which means that the exhaust port 201 is a certain distance away from the edge of the lower end surface of the circuit breaker, but it does not limit that the exhaust port 201 should be located at the center of the lower end surface. The exhaust port 201 of the example is located at a position close to the left edge of the lower end surface of the circuit breaker, and the distance between the exhaust port 201 and the left edge is much greater than the distance between the exhaust port 201 and the right edge of the lower end surface.

[0035] The lower end surface of the housing assembly is provided with a flange extending downward, and the flange is arranged around or partially around the exhaust port 201, so that the flange forms the extension air channel 24. In this example, the flange is arranged around the exhaust port 201, and the side wall of the extension air channel 24 is formed with a gap 241, so that part of the charged gas discharged from the exhaust port 201 is discharged laterally from the gap 241, and part of the charged gas is discharged downward from the end of the extension air channel 24, avoiding the accumulation of charged gas below the circuit breaker. In other embodiments, if the space below the circuit breaker is sufficient, the flange can also be arranged completely around the exhaust port 201, and in this case, all the charged gas discharged from the exhaust port 201 is discharged downward from the end of the extension air channel 24, which can further reduce the possibility of the charged gas splashing onto the surrounding devices and further improve the safety of the surrounding devices. In addition, the flange provided on the lower end surface of the housing assembly can also be arranged at other positions outside the exhaust port 201, and is not limited to being arranged completely around or partially around the exhaust port 201, for example, being arranged at any position on the corner or middle of the lower end surface of the housing assembly. When the circuit breaker is fitted with the installed object, the flange can lift the exhaust port, so that the exhaust port 201 has a certain distance from the surface of the installed object, to prevent the exhaust port 201 from being blocked, and to be compatible with more installation scenarios; in this case, the flange does not necessarily form an extension air channel. Of course, the gap of the extension air channel 24 described above can also prevent the exhaust port 201 from being blocked, that is, the extension air channel 24 with a gap can prevent the exhaust port 201 from being blocked and can also extend the length of the exhaust passage.

[0036] The exhaust passage 20 extends to the lower end surface of the housing assembly in a downward or obliquely downward direction, and the exhaust port 201 at the end of the exhaust passage 20 is arranged on the lower end surface of the circuit breaker, so that the bending of the exhaust passage 20 can be reduced, the airflow loss can be reduced, the gas can be smoothly discharged, the arc reignition can be prevented, and the temperature of the arc extinguishing chamber can be reduced, thereby improving the arc extinguishing effect.

[0037] The plurality of exhaust passages 20 are respectively located on the left side or the right side of the first base body 13. More specifically, the exhaust passages 20 include a first exhaust passage 21, a second exhaust passage 22, and a third exhaust passage 23, the first exhaust passage 21 and the second exhaust passage 22 are respectively located on the left and right sides of the first base body 13, and the third exhaust passage 23 is located on the same side of the first base body 13 as the second exhaust passage 22. In this example, the first exhaust passage 21 is located on the left side of the first base body 13, that is, the first exhaust passage 21 is formed between the first side cover 11 and the first base body 13, and the second exhaust passage 22 and the third exhaust passage 23 are located on the right side of the first base body 13, that is, the second exhaust passage 22 and the third exhaust passage 23 are formed between the first base body 13 and the second base body 14.

[0038] Referring to Figure 4and Figure 5 As shown in the figure, the first exhaust passage 21 and the second exhaust passage 22 are communicated with the outlet side of the arc extinguishing chamber 10, and the air inlets of the first exhaust passage 21 and the second exhaust passage 22 are respectively arranged at the outlet side of the first mounting port 131, for discharging the ionized gas and the free arc discharged from the arc extinguishing chamber to the outside of the circuit breaker. The third exhaust passage 23 is arranged at one side of the arc extinguishing chamber, and is communicated with the space where the moving and static contacts of the N pole conducting system 40 are located, for discharging the arc generated by the disconnection of the moving and static contacts of the N pole conducting system 40 to the outside of the circuit breaker, so as to extinguish the arc.

[0039] The air inlet of the first exhaust passage 21 is higher than the air inlet of the second exhaust passage 22, and the second exhaust passage 22 has more bends relative to the first exhaust passage 21. The air inlet of the first exhaust passage 21 is higher than the air inlet of the second exhaust passage 22, so that the charged gas discharged from the upper end of the arc extinguishing chamber 10 can be discharged to the outside of the circuit breaker through the first exhaust passage 21, and the charged gas discharged from the lower end of the arc extinguishing chamber 10 can be discharged to the outside of the circuit breaker through the second exhaust passage 22. Since the air inlet of the second exhaust passage 22 is arranged lower, and the exhaust outlets 201 of the two exhaust passages are both arranged at the lower end surface of the circuit breaker, the second exhaust passage 22 is arranged with more bends relative to the first exhaust passage 21, which can prolong the length of the second exhaust passage 22, so as to facilitate the full cooling of the arc in the second exhaust passage 22, and prevent the temperature from being too high after being discharged to the outside of the circuit breaker.

[0040] The structures of the first exhaust passage 21 and the second exhaust passage 22 are as follows: the first exhaust passage 21 includes a first exhaust section 211 and a second exhaust section 212 along the airflow direction, the first exhaust section 211 extends downward from the side wall of the first mounting port 131 and towards the edge of the first base body 13 in the front-rear direction, the second exhaust section 212 extends downward from the end of the first exhaust section 211 and towards the middle of the first base body 13 in the front-rear direction, and the end of the second exhaust section 212 forms the exhaust outlet 201 of the first exhaust passage 21; the second exhaust passage 22 includes a third exhaust section 221, a fourth exhaust section 222 and a fifth exhaust section 223 along the airflow direction, the third exhaust section 221 extends downward from the side wall of the first mounting port 131, the fourth exhaust section 222 extends from the end of the third exhaust section 221 towards the middle of the first base body 12 in the front-rear direction, and the fifth exhaust section 222 extends downward from the end of the fourth exhaust section 222, and the end of the fifth exhaust section 222 forms the exhaust outlet 201 of the second exhaust passage 22.

[0041] The third exhaust passage 23 is divided into two parts in the front-rear direction, thereby increasing the cross-sectional area of the third exhaust passage 23 and improving the exhaust efficiency. Further, the part dividing the third exhaust passage 23 into two parts is the arc guiding plate 5 and the mounting portion 142 for mounting the arc guiding plate, and the mounting portion 142 is protruded on one side surface of the second base body 14, which helps to guide the arc formed by the N-pole conducting system 40 along the exhaust direction of the third exhaust passage 23 and promotes the arc to be exhausted along the third exhaust passage 23. In the example, the third exhaust passage 23 extends in a downward and oblique direction, and in other embodiments, the third exhaust passage 23 can also extend downward in a direction close to vertical.

[0042] The switch device in the above embodiments is a double-pole circuit breaker, and in other embodiments, the switch device can also be a single-pole or other multi-pole circuit breaker, and can also be other switch devices with arc extinguishing and exhaust requirements, such as disconnectors, etc. In addition, the exhaust passages 20 are not limited to three, and according to the actual requirements of the switch device, only one, two or more exhaust passages 20 can be provided.

[0043] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, those skilled in the art should understand that the remaining unexplained parts are prior art, and various changes made to the utility model in form and details without departing from the spirit and scope of the utility model defined by the appended claims all fall within the protection scope of the utility model.

Claims

1. A switchgear comprising a housing assembly provided with a plurality of end faces, an arc chute being provided within the housing assembly, and at least one exhaust channel for exhausting electrically charged gas from the arc chute to the outside of the housing assembly, characterized in that: The direction of the switch device towards the object to which the switch device is installed is defined as a bottom direction, and the end surface of the housing assembly towards the bottom direction is defined as a lower end surface. The exhaust port of the exhaust passage is arranged on the lower end surface of the housing assembly.

2. A switchgear according to claim 1, characterized in that: The exhaust port is arranged in the middle of the lower end surface.

3. A switchgear according to claim 1, characterized in that: The lower end surface of the housing assembly is provided with a flange extending downward.

4. A switchgear according to claim 3, characterised in that: The flange is arranged around or partially around the exhaust port, so that the flange forms an extended air passage.

5. A switchgear according to claim 4, characterised in that: The flange is partially arranged around the exhaust port, and the side wall of the extended air passage is provided with a notch.

6. A switchgear according to claim 1, characterized in that: The exhaust passage extends to the lower end surface of the housing assembly in a downward or obliquely downward direction.

7. A switchgear according to claim 6, characterized in that: The housing assembly comprises a first base body provided with a first installation port for forming a part of the arc extinguishing chamber, and the first installation port penetrates the first base body. The direction in which the first installation port penetrates the first base body is defined as a left-right direction. The exhaust passage is multiple, and the multiple exhaust passages are respectively arranged on the left side or the right side of the first base body.

8. A switchgear according to claim 7, characterized in that: The direction perpendicular to the left-right direction on the horizontal plane is defined as a front-rear direction. The exhaust passage comprises a first exhaust passage and a second exhaust passage connected to the outlet side of the arc extinguishing chamber. The first exhaust passage and the second exhaust passage are respectively arranged on the left side and the right side of the first base body. The air inlet of the first exhaust passage is higher than the air inlet of the second exhaust passage. The second exhaust passage has more bends relative to the first exhaust passage.

9. A switchgear according to claim 8, characterized in that: The first exhaust passage comprises a first exhaust section and a second exhaust section along the airflow direction. The first exhaust section extends downward from the side wall of the first installation port and towards the edge of the first base body in the front-rear direction. The second exhaust section extends downward from the end of the first exhaust section and towards the middle of the first base body in the front-rear direction. The end of the second exhaust section forms the exhaust port of the first exhaust passage. The second exhaust passage comprises a third exhaust section, a fourth exhaust section and a fifth exhaust section along the airflow direction. The third exhaust section extends downward from the side wall of the first installation port. The fourth exhaust section extends from the end of the third exhaust section towards the middle of the first base body in the front-rear direction. The fifth exhaust section extends downward from the end of the fourth exhaust section. The end of the fifth exhaust section forms the exhaust port of the second exhaust passage.

10. A switchgear according to claim 7, characterized in that: The direction perpendicular to the left-right direction on the horizontal plane is defined as a front-rear direction. The exhaust passage further comprises a third exhaust passage. The third exhaust passage is divided into two parts in the front-rear direction, thereby increasing the cross-sectional area of the third exhaust passage.

11. A switchgear according to any of claims 1-10, characterized in that: The switch device is a double-pole circuit breaker.

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