Contactor and arc extinguishing device thereof

Abstract

The arc extinguishing device comprises an arc extinguishing chamber and a release cavity, at least one partition plate is arranged in the release cavity, the release cavity is divided into at least two release sub-cavities with the same air pressure by the at least one partition plate, and an inlet of each release sub-cavity is connected with an outlet of the arc extinguishing chamber. The outlet of each release sub-cavity is provided with at least one exhaust hole. According to the technical scheme, the release cavity is divided into two parts through the partition plate, air pressure balance in the two small cavities is guaranteed, air can be evenly released from the two small cavities in a dispersed mode and cannot be released from one place in a concentrated mode, surrounding devices are not prone to damage, and safety is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of contactors, in particular to a contactor and an arc extinguishing device thereof. Background Art

[0002] The arc extinguishing device provided by the prior art, such as Figure 1 As shown, the arc extinguishing device includes an arc extinguishing chamber 100 and a release chamber 80. When the static contact bar and the moving contact bar in the contactor are disconnected under load, the generated arc will be magnetically blown to the arc extinguishing chamber 100 at a high speed (such as 100m / s), and the remaining gas after passing through the arc extinguishing chamber will be directly released through the release chamber. During the release process, the local energy of the gas will be too large, such as concentrated in the middle part, which is easy to damage surrounding devices and affect product performance. Utility Model Content

[0003] The embodiment of the utility model provides a contactor and an arc extinguishing device thereof to solve the above technical problems.

[0004] A first aspect of an embodiment of the utility model provides an arc extinguishing device for a contactor, the arc extinguishing device comprising an arc extinguishing chamber and a release chamber, at least one partition is provided in the release chamber, the at least one partition divides the release chamber into at least two release sub-chambers with the same air pressure, the inlet of each release sub-chamber is connected to the outlet of the arc extinguishing chamber, and the outlet of each release sub-chamber is provided with at least one exhaust hole.

[0005] Optionally, an adjusting partition is provided in the release chamber, and the adjusting partition divides the release chamber into a first release sub-chamber and a second release sub-chamber with the same air pressure.

[0006] Optionally, a concave cavity recessed into the cavity is provided at the bottom of each release sub-cavity, and at least one exhaust hole is provided on the bottom wall or side wall of the concave cavity.

[0007] Optionally, the outlet of the inner concave cavity is aligned with a cooling module, and the cooling module is used to cool the gas discharged from the release cavity.

[0008] Optionally, the arc extinguishing chamber includes:

[0009] The arc extinguishing grid is arranged adjacent to the stationary contact bar and the moving contact bar. The arc extinguishing grid comprises a plurality of grid pieces connected in sequence. The outlet of the arc extinguishing grid is the outlet of the arc extinguishing chamber.

[0010] Optionally, the arc extinguishing device further comprises a filter assembly, an inlet of the filter assembly is connected to the arc extinguishing grid, the filter assembly is used to filter sparks generated by the electric arc, and an outlet of the filter assembly is an outlet of the arc extinguishing chamber.

[0011] Optionally, the filter assembly includes a filter screen or at least two filter screens arranged in sequence.

[0012] A second aspect of an embodiment of the utility model provides a contactor, the contactor comprising the arc extinguishing device of the first aspect, the contactor comprising a stationary contact bank and a moving contact bank arranged opposite to the stationary contact bank.

[0013] The technical effect of the embodiment of the utility model is as follows: the release chamber is divided into two parts by a partition, so that the air pressure in the two small chambers is balanced, and the gas can be released evenly and dispersedly from the two small chambers, and will not be concentrated and released from one place, so that the surrounding devices are not easily damaged and the safety is higher. The air pressure of each release sub-chamber can be adjusted by adjusting the position of the partition to adapt to different operating requirements, thereby improving the flexibility and adaptability of the system. Since the released gas pressure is more uniform, the system is more stable, the accidents caused by uneven air pressure are reduced, and the safety of the system is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a structural schematic diagram of an arc extinguishing device of a contactor provided by the prior art;

[0016] Figure 2 This is a schematic structural diagram of an arc extinguishing device for a contactor provided in Embodiment 1 of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of a release chamber of an arc extinguishing device of a contactor provided in Embodiment 1 of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of an arc extinguishing device for a contactor provided in Embodiment 2 of the present utility model;

[0019] Figure 5 This is a three-dimensional diagram of a release chamber of an arc extinguishing device of a contactor provided in Embodiment 2 of the present utility model;

[0020] Figure 6 This is a front view of a release chamber of an arc extinguishing device of a contactor provided in the second embodiment of the utility model;

[0021] Figure 7 This is a schematic diagram of the structure of an arc extinguishing device for a contactor provided in Embodiment 3 of the present utility model;

[0022] Figure 8This is a schematic diagram of the working process of an arc extinguishing device of a contactor provided in Embodiment 3 of the present utility model;

[0023] Fig. 9 This is a structural diagram of a contactor provided in Embodiment 4 of the present utility model;

[0024] Fig.10 This is a structural diagram of a contactor provided in Embodiment 4 of the present utility model;

[0025] Fig.11 This is a structural diagram of a contactor provided in Embodiment 4 of the present utility model;

[0026] Fig.12 This is a schematic diagram of the connection structure of a contactor provided in the fourth embodiment of the present utility model;

[0027] In the figure: 10, static contact bar; 20, moving contact bar; 30, arc extinguishing grid; 60, magnetic part; 70, filter assembly; 71, first filter screen; 72, second filter screen; 80, release chamber; 81, partition; 82, first release sub-chamber; 83, second release sub-chamber; 90, inner concave chamber; 91, first exhaust hole; 92, second exhaust hole; 93, first inner concave chamber; 94, second inner concave chamber; 100, arc extinguishing grid; 110, battery cooling module; 120, cooling module; 130 battery pack; 140, arc extinguishing device. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be understood that the utility model can be implemented in different forms and should not be construed as being limited to the embodiments presented herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and fully convey the scope of the utility model to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0030] It should be understood that when an element or layer is referred to as being "on, adjacent to, connected to or coupled to other elements or layers, it may be directly on, adjacent to, connected to or coupled to other elements or layers, or there may be intervening elements or layers. On the contrary, when an element is referred to as being "directly on, directly adjacent to, directly connected to or directly coupled to other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be represented as a second element, component, region, layer or part.

[0031] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein for ease of description to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the accompanying drawings is flipped, then the elements or features described as "under other elements" or "under" or "under" will be oriented as "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0032] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be a limitation of the present invention. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising" when used in this specification determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0033] In order to thoroughly understand the present invention, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0034] Embodiment 1

[0035] The utility model provides an arc extinguishing device for a contactor in a first embodiment, which solves the problem in the prior art that excess gas after being filtered by the arc extinguishing grid is concentrated in the middle and released, which easily damages surrounding devices during the release process and affects product performance.

[0036] The utility model provides an arc extinguishing device for a contactor, such as Figure 2 As shown, the arc extinguishing device includes an arc extinguishing chamber 100 and a release chamber 80. At least one partition is provided in the release chamber 80. The at least one partition divides the release chamber 80 into at least two release sub-chambers with the same gas pressure. The inlet of each release sub-chamber is connected to the outlet of the arc extinguishing chamber 100, and the outlet of each release sub-chamber is provided with at least one exhaust hole.

[0037] Among them, the release chamber 80 is a component, which contains at least one partition, dividing it into at least two release sub-chambers. The adjustable partition can be moved. The purpose of this design is to divide the gas release chamber 80 into different areas to ensure that the released gas can be more evenly distributed and reduce damage to surrounding devices during the release process.

[0038] As an implementation method, Figure 2 and Figure 3 As shown, an adjusting partition 81 is provided in the release chamber 80, and the adjusting partition 81 divides the release chamber 80 into a first release sub-chamber 82 and a second release sub-chamber 83 with the same gas pressure. The bottom of the first release sub-chamber 82 is provided with at least one exhaust hole 91, and the bottom of the second release sub-chamber 83 is provided with at least one exhaust hole 92. The function of the adjusting partition is to adjust the release amount and pressure of the gas as needed, so that the gas pressure of the two sub-chambers is basically balanced. One end of the partition is close to the arc extinguishing chamber 100, and the other end is connected to the bottom of the shell, dividing the release chamber 80 into two release sub-chambers, each of which has at least one or more exhaust holes for releasing gas and adjusting the pressure and flow of the gas. By adjusting the size and number of these exhaust holes, the speed and uniformity of the released gas can be further controlled.

[0039] The technical effect of this embodiment is that the release chamber is divided into two parts by a partition, so that the air pressure in the two small chambers is balanced, and the gas can be evenly dispersed and released from the two small chambers, and will not be concentrated in one place, so that the surrounding devices are not easily damaged, and the safety is higher. The air pressure of each release sub-chamber can also be adjusted by adjusting the position of the partition to meet different operating requirements, thereby improving the flexibility and adaptability of the system. Since the pressure of the released gas is more uniform, the system is more stable, and the unexpected situations caused by uneven air pressure are reduced, thereby improving the safety of the system.

[0040] Embodiment 2

[0041] In the prior art, the remaining gas is released directly from the exhaust hole through the release cavity, and the local energy is too large, which can easily damage the components adjacent to the release cavity and affect the product performance.

[0042] The second embodiment of the present invention provides an arc extinguishing device for a contactor, which prevents gas from being directly released to contact the inner wall of a battery pack and damage the battery pack structure by setting an inner concave cavity at the bottom of the cavity.

[0043] The technical solution provided in the second embodiment of the present utility model is based on the technical solution provided in the first embodiment, such as Figure 4 As shown, each release sub-cavity has an inner concave cavity 90 sunken into the cavity at the bottom, and the bottom wall or side wall of the inner concave cavity 90 is provided with at least one exhaust hole.

[0044] Among them, a concave exhaust hole structure is set near the bottom of the outer shell. The exhaust hole, the bottom of the outer shell and the inner wall of the battery pack form a cavity as a buffer chamber, which can prevent the gas from being directly released and contacting the inner wall of the battery pack, thereby avoiding the possibility of damage to the battery pack structure.

[0045] As an example, Figures 4 to 6 As shown, a partition 81 is provided in the release chamber 80, and the partition 81 divides the release chamber 80 into a first release sub-chamber 82 and a second release sub-chamber 83. A first inner concave cavity 93 is provided at the bottom of the first release sub-chamber 82, and a second inner concave cavity 94 is provided at the bottom of the second release sub-chamber 82. A first exhaust hole 91 is provided on the first inner concave cavity 93, and a second exhaust hole 92 is provided on the second inner concave cavity 94.

[0046] Furthermore, the outlet of the inner concave cavity 90 is aligned with a cooling module, and the cooling module is used to cool the gas discharged from the release cavity. The inner concave cavity is a cavity or channel designed to control the flow of gas, and is used to guide the flow of gas. In this scheme, the design of the inner concave cavity allows it to effectively guide the gas to the outlet. The outlet of the inner concave cavity is designed to be directly aligned with a cooling module, which means that after the gas flows out of the inner concave cavity, the cooling module can be immediately cooled. The cooling module is a device specially designed to reduce the temperature of the gas, and may include components such as a radiator, a coolant circulation system, and a cooling pipe. The function of the module is to reduce the temperature of the gas by absorbing heat. The release cavity is used to release high-temperature or high-pressure gas. During the release process, the gas may be dangerous to the surrounding environment, so cooling treatment is required. The gas discharged from the release cavity enters the cooling module through the outlet of the inner concave cavity.

[0047] The working process of the above embodiment is as follows:

[0048] When the gas needs to be released, the gas enters the release chamber 80 through the outlet of the arc extinguishing chamber 100. The partition divides the release chamber 80 into multiple sub-chambers, and the air pressure of the sub-chamber can be adjusted by adjusting the partition. After the pressure of the gas in the release chamber 80 is balanced, it is released into the external environment through the exhaust holes at both ends of the partition. By separating the release chamber 80 and adjusting the partition, precise control and regulation of the released gas is achieved. The air pressure distribution in the release chamber 80 is more uniform, avoiding the problem of shell damage that may be caused by concentrated gas release. The exhaust hole forms a cavity with the bottom of the outer shell and the inner wall of the battery pack, which serves as a buffer chamber for outward release. The design of the exhaust hole makes the released gas flow rate and speed adjustable, so as to meet the needs of different scenarios and improve the flexibility and applicability of the device. The gas discharged from the exhaust hole is directly aimed at the cooling module and cooled by the cooling module.

[0049] The technical effect of this embodiment is as follows: a concave exhaust hole structure is provided near the bottom of the outer shell, and the exhaust hole, the bottom of the outer shell, and the inner wall of the battery pack form a cavity which serves as a buffer chamber, thereby preventing the gas from being directly released and contacting the inner wall of the battery pack, thereby avoiding the possibility of damage to the battery pack structure.

[0050] Embodiment 3

[0051] The third embodiment of the present invention provides an arc extinguishing device for a contactor, wherein a filter is arranged in the arc extinguishing device to process sparks generated by an electric arc.

[0052] The technical solution provided in the third embodiment of the present utility model is based on the technical solutions provided in the first and second embodiments, such as Figure 7 As shown, the arc extinguishing chamber 100 comprises:

[0053] The arc extinguishing grid 30 includes a plurality of grid pieces connected in sequence, and the outlet of the arc extinguishing grid 30 is the outlet of the arc extinguishing chamber.

[0054] The arc extinguishing chamber 100 further includes a filter assembly 70 , an inlet of which is connected to the arc extinguishing grid 30 , and the filter assembly 70 is used to filter sparks generated by the electric arc.

[0055] As an embodiment, the filter assembly 70 includes a filter screen or at least two filter screens arranged in sequence.

[0056] The filter assembly 70 is connected to the outlet of the arc extinguishing grid 30. When the arc passes through the arc extinguishing grid 30 and enters the filter assembly 70, the filter screen inside the filter assembly 70 plays a filtering role to prevent the spark from continuing to propagate and spread.

[0057] With respect to the above-mentioned embodiments 1 to 3, as an example, an arc extinguishing device of a contactor is provided, and the arc extinguishing device includes: an arc extinguishing grid 30, a first filter screen and a second filter screen, the inlets of the first filter screen and the second filter screen are connected to the arc extinguishing grid 30, and the first filter screen and the second filter screen are used to filter the sparks generated by the arc in turn.

[0058] The technical effect of the third embodiment is that the main function of setting the filter assembly is to filter the sparks generated by the arc to prevent the sparks from spreading further and causing greater safety hazards. The design of the filter can effectively capture and isolate the sparks, protect the equipment from the potential dangers caused by the sparks, and improve the safety and reliability of the equipment. In general, the arc extinguishing grid and the filter assembly work together in the process of handling the sparks generated by the arc. The arc extinguishing grid is responsible for guiding the arc and extinguishing it, and the filter assembly is responsible for filtering the sparks to ensure that the sparks will not spread and cause safety problems, effectively improving the safety and stability of the equipment, and playing an important role in the arc handling process.

[0059] Embodiment 4

[0060] A fourth embodiment of the present invention provides a contactor, the contactor includes the arc extinguishing device described in the third embodiment, and the contactor includes a stationary contact row and a moving contact row arranged opposite to the stationary contact row.

[0061] like Figures 9 to 11 As shown, the contactor includes a stationary contact bar 10, a movable contact bar 20, an arc extinguishing grid 30, a filter assembly 70, and a release chamber 80. The filter assembly 70 includes a first filter screen 71 and a second filter screen 72. The inlets of the first filter screen 71 and the second filter screen 72 are connected to the arc extinguishing grid 30. An adjusting partition 81 is provided in the release chamber 80. The adjusting partition 81 divides the release chamber 80 into a first release sub-chamber 82 and a second release sub-chamber 83 with the same air pressure. An inner concave cavity 90 recessed into the cavity is provided at the bottom of each release sub-chamber, and at least one exhaust hole is provided on the bottom wall or side wall of the inner concave cavity 90.

[0062] When an arc is generated between the moving contact row and the stationary contact row, the magnetic moving arc-starting plate and the magnetic static arc-starting plate diverge and guide the arc to one side of the arc extinguishing grid through the magnetic field. The arc extinguishing grid 30 extinguishes the arc, and the filter assembly 70 filters the sparks of the arc. When it is necessary to release the gas, the gas enters the release chamber 80 through the outlet of the filter assembly 70, and the regulating baffle 81 divides the release chamber 80 into a first release sub-chamber 81 and a second release sub-chamber 82. After the pressure of the gas in the release chamber 80 is balanced, it is released to the external environment through the exhaust holes at both ends of the baffle. By separating the release chamber 80 and adjusting the baffle, precise control and regulation of the released gas is achieved. The air pressure distribution in the release chamber 80 is more uniform, avoiding the problem of shell damage that may be caused by concentrated gas release. The exhaust hole forms a cavity with the bottom of the shell and the inner wall of the battery pack as a buffer chamber for outward release. The design of the exhaust hole makes the released gas flow rate and speed adjustable, thereby meeting the needs of different scenarios and improving the flexibility and applicability of the device.

[0063] like Fig.10 As shown, as an embodiment, the contactor is located in the battery pack 130, and the battery pack 130 also includes an arc extinguishing device 140, a power battery module 110 and a cooling module 120. The power battery module 110 is located on the cooling module 120, and the inner concave cavity of the release cavity is aligned with the cooling module 120, so that the cooling module 120 cools the gas discharged from the arc extinguishing device 100 to prevent the discharged gas from damaging the battery pack shell and the power battery module 110 or other components inside.

[0064] It should be noted that the cooling module 120 is a cooling module that comes with the battery pack 130 itself. By reusing the cooling module 120 to cool the gas discharged by the arc extinguishing device 100, not only resources are saved but also the overall efficiency is improved. By reusing the existing cooling system, additional costs and equipment investment are avoided.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. An arc extinguishing device for a contactor, characterized in that: The arc extinguishing device comprises an arc extinguishing chamber (100) and a release chamber (80), wherein at least one partition is provided in the release chamber (80), and the at least one partition divides the release chamber (80) into at least two release sub-chambers with the same gas pressure, the inlet of each release sub-chamber is connected to the outlet of the arc extinguishing chamber (100), and the outlet of each release sub-chamber is provided with at least one exhaust hole.

2. The arc extinguishing device according to claim 1, characterized in that: An adjusting partition (81) is provided in the release chamber (80), and the adjusting partition divides the release chamber (80) into a first release sub-chamber (82) and a second release sub-chamber (83) having the same air pressure.

3. The arc extinguishing device according to claim 2, characterized in that: The bottom of each release sub-cavity is provided with an inner concave cavity (90) which is recessed into the cavity, and the bottom wall or the side wall of the inner concave cavity (90) is provided with at least one exhaust hole.

4. The arc extinguishing device according to claim 3, characterized in that: The outlet of the inner concave cavity (90) is aligned with a cooling module, and the cooling module is used to cool the gas discharged from the release cavity.

5. The arc extinguishing device according to claim 1, characterized in that: The arc extinguishing chamber (100) comprises: An arc extinguishing grid (30), the arc extinguishing grid (30) comprising a plurality of grid pieces connected in sequence, the outlet of the arc extinguishing grid (30) being the outlet of the arc extinguishing chamber.

6. The arc extinguishing device according to claim 5, characterized in that: The arc extinguishing chamber (100) further comprises a filter assembly (31), the inlet of the filter assembly (31) being connected to the arc extinguishing grid (30), the filter assembly being used for filtering sparks generated by an electric arc, and the outlet of the filter assembly being the outlet of the arc extinguishing chamber.

7. The arc extinguishing device according to claim 6, characterized in that: The filter assembly (31) comprises a filter screen or at least two filter screens arranged in sequence.

8. A contactor, characterized in that: The contactor comprises the arc extinguishing device according to any one of claims 1 to 7, and the contactor comprises a stationary contact bank (10) and a moving contact bank arranged opposite to the stationary contact bank (10).

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