Arc extinguish chamber installation structure

Abstract

The utility model discloses an arc extinguish chamber mounting structure, which comprises a shell (1) and an arc extinguish chamber (2), the arc extinguish chamber (2) is mounted in an arc extinguish chamber mounting space (1a) in the shell (1), and the arc extinguish chamber mounting structure is characterized in that the rear side surface of the arc extinguish chamber (2) is also provided with a lower fastening structure (4); the lower fastening structure (4) can be installed from back to front so that the arc extinguish chamber (2) can be fixed in the arc extinguish chamber installation space (1a) in the shell (1), the lower fastening structure (4) can enlarge the area space where arc extinguish grid pieces can be arranged in an inner cavity of the arc extinguish chamber (2), and therefore more arc extinguish grid pieces can be arranged to improve the breaking capacity under high voltage.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of low-voltage electrical apparatus, specifically relates to an arc-extinguishing chamber mounting structure. BACKGROUND

[0002] In the field of existing low-voltage electrical apparatus, the voltage that can be borne by a direct current switch can only reach DC 1500V. According to the latest development needs of the low-voltage electrical apparatus industry, the current voltage that needs to be borne by the direct current switch will develop to AC 2000V, DC 3000V. At present, the product can reach single-pole DC 750V and two-pole DC 1500V. Traditionally, the DC 1500V product usually uses 4P, but the product of 4P has a large volume and high cost; in order to reduce the cost, the products of 2P / DC 1500V and 2P / DC 2000V have appeared on the market, but the product of 2P / DC 1500V and 2P / DC 2000V needs to bear a higher voltage per P, for example, the product of 4P / DC 1500V bears an average voltage of 375V per P, and the product of 2P / DC 1500V needs to bear a voltage of 750V per P. After the voltage borne per P is doubled, in order to meet the performance requirements of arc extinction, the number of arc-extinguishing grid pieces of each pole arc-extinguishing chamber needs to be increased to improve the breaking capacity under high voltage. However, in the existing traditional arc-extinguishing chamber mounting mode, due to the low breaking voltage and small volume of the arc-extinguishing chamber, the mode of fixing the arc-extinguishing chamber at the front end and the rear end on the side surface corresponding to the exhaust port by using fasteners on the shell is difficult to increase the number of arc-extinguishing grid pieces. SUMMARY

[0003] In view of the defects that the existing arc-extinguishing chamber mounting structure leads to limited installation space of arc-extinguishing grid pieces in the arc-extinguishing chamber, it is difficult to increase more arc-extinguishing grid pieces, and it is difficult to meet the breaking performance under high voltage, the utility model provides an arc-extinguishing chamber mounting structure, which changes the mounting mode of the arc-extinguishing chamber, increases the space that can be occupied by the arc-extinguishing grid pieces in the arc-extinguishing chamber, and can arrange more arc-extinguishing grid pieces, thereby improving the breaking capacity under high voltage.

[0004] TECHNICAL SCHEME

[0005] In order to achieve the above technical purpose, the utility model provides an arc-extinguishing chamber mounting structure, which comprises a shell and an arc-extinguishing chamber, the arc-extinguishing chamber is installed in the arc-extinguishing chamber installation space in the shell, and characterized in that: a lower fastening structure is further arranged on the rear side surface of the arc-extinguishing chamber, the lower fastening structure can be installed from the rear to the front to fix the arc-extinguishing chamber in the arc-extinguishing chamber installation space in the shell, and the lower fastening structure can make the region space arranged by the arc-extinguishing grid pieces in the inner cavity of the arc-extinguishing chamber larger.

[0006] In one of the embodiments, the upper side of the arc extinguishing chamber is provided with an upper fastening structure, which can be installed from top to bottom to fix the arc extinguishing chamber in the arc extinguishing chamber installation space in the shell.

[0007] In one of the embodiments, the lower fastening structure comprises a fastening screw, which is arranged from back to front and locks the arc extinguishing chamber to the shell through threaded connection.

[0008] In one of the embodiments, the bottom surface of the shell inner cavity is provided with a boss extending forward, the boss penetrates the through hole on the current-carrying member, and the boss is provided with a mounting hole at a position corresponding to the fastening screw, the fastening screw penetrates the mounting hole from back to front to lock the arc extinguishing chamber on the shell.

[0009] In one of the embodiments, the upper cover of the arc extinguishing chamber is provided with a groove corresponding to the mounting hole on the boss on the bottom surface of the shell inner cavity, and a fastening nut is embedded in the groove, and the fastening screw is screwed with the fastening nut after penetrating the mounting hole.

[0010] In one of the embodiments, the upper fastening structure is arranged on the front part of the upper side of the upper cover of the arc extinguishing chamber.

[0011] In one of the embodiments, the lower fastening structure is arranged on the rear side of the upper cover of the arc extinguishing chamber.

[0012] In one of the embodiments, only the lower fastening structure is arranged on the rear side of the upper cover of the arc extinguishing chamber, and the upper fastening structure is not arranged.

[0013] In one of the embodiments, the lower fastening structure comprises a rivet, which rivets the arc extinguishing chamber and the shell.

[0014] In one of the embodiments, the upper cover and the fastening nut are an integral structure.

[0015] Advantages

[0016] The arc extinguishing chamber installation structure provided by the utility model has the advantages that the lower fastening structure can be installed from back to front to fix the arc extinguishing chamber in the arc extinguishing chamber installation space in the shell, the lower fastening structure can make the area space of the arc extinguishing chamber inner cavity larger, so that more arc extinguishing grid fins can be arranged to improve the breaking capacity under high voltage. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0018] Figure 1 is a schematic diagram of the arc extinguishing chamber installation in the prior art; Figure 1

[0019] Figure 1 is a schematic diagram of the arc extinguishing chamber installation in the prior art; Figure 2

[0020] Figure 1 is a schematic diagram of the arc extinguishing chamber installation in the prior art; Figure 3

[0021] Figure 1 is a schematic diagram of the arc extinguishing chamber installation in the prior art; Figure 4

[0022] Figure 1 is a schematic diagram of the arc extinguishing chamber installation in the prior art; Figure 5

[0023] Figure 1 is a schematic diagram of the arc extinguishing chamber installation in the prior art; Figure 6

[0024] Figure 1 is a schematic diagram of the arc extinguishing chamber installation in the prior art; Figure 7

[0025] Figure 1 is a schematic diagram of the arc extinguishing chamber installation in the prior art; Figure 8 DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely explain the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the specification of the present application are only for the purpose of illustration, and do not indicate the only implementation.​​​​​​​​

[0028] Furthermore, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0029] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of a first feature to a second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0030] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by a person skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more of the related listed items.

[0031] Embodiment 1

[0032] At present, 2P / DC1500V and 2P / DC2000V products have appeared in the market, but such 2P / DC1500V and 2P / DC2000V products need to bear a higher voltage per P, for example, a 4P / DC1500V product needs to bear an average voltage of 375V per P, and a 2P / DC1500V product needs to bear a voltage of 750V per P. After the voltage per P is doubled, in order to meet the performance requirements of arc extinction, the number of arc-extinguishing vanes needs to be increased in each pole arc-extinguishing chamber to improve the breaking capacity under high voltage. However, in the existing traditional arc-extinguishing chamber mounting mode, because the on-break voltage is low, the volume of the arc-extinguishing chamber is small, as shown in FIG. 1, the arc-extinguishing vanes are fixed on the shell by fasteners at the front end and the rear end on the side corresponding to the exhaust port, and the space of the arc-extinguishing vanes in the front-rear direction is limited, and it is difficult to increase the number of arc-extinguishing vanes. Figure 1

[0033] In order to solve this problem, as shown in FIG. 2, the arc-extinguishing vanes are fixed on the shell by fasteners at the front end and the rear end on the side corresponding to the exhaust port, and the space of the arc-extinguishing vanes in the front-rear direction is increased, so that more arc-extinguishing vanes can be arranged. Figure 2 ​The embodiment shown provides an arc-extinguishing chamber mounting structure, which comprises a shell 1 and an arc-extinguishing chamber 2. Figure 3 The upper side of the arc-extinguishing chamber 2, i.e., the side corresponding to the exhaust port, is provided with an upper fastening structure 3, which can be mounted from top to bottom to fix the arc-extinguishing chamber 2 in the arc-extinguishing chamber mounting space 1a in the shell 1.

[0034] As shown in the accompanying drawings, Figure 2 Specifically, the upper fastening structure 3 is arranged on the front part of the upper side of the upper cover 23 of the arc-extinguishing chamber 2. Figure 8 As shown in the accompanying drawings, Figure 6 The bottom surface of the inner cavity of the shell 1 is provided with a boss 11 extending forward, the boss 11 penetrates the through hole 42a on the current-carrying member 42, and the boss 11 is provided with a mounting hole 111 at a position corresponding to the fastening screw 41. Figure 4 As shown in the accompanying drawings, Figure 5 As shown in the accompanying drawings,

[0035] The arc-extinguishing chamber mounting structure provided by the embodiment comprises a shell 1 and an arc-extinguishing chamber 2. Figure 7 As shown in the accompanying drawings, Figure 8As shown, the lower fastening structure 4 can be used to install the arc-extinguishing chamber from the rear side of the housing, and the lower fastening structure 4 is used to install and fix the arc-extinguishing chamber 2 from the rear to the front, instead of installing from the top to the bottom, so that the upper cover 23 of the arc-extinguishing chamber 2 is located below the area occupied by the lower fastening structure 4, i.e., the space in which the arc-extinguishing vanes can be arranged in the inner cavity of the arc-extinguishing chamber 2 is not occupied by the lower fastening structure 4, and the space in which the arc-extinguishing vanes can be arranged is increased, so that more arc-extinguishing vanes can be arranged to improve the breaking capacity under high voltage.

[0036] Embodiment 2

[0037] In this embodiment, the lower fastening structure 4 is arranged on the rear side of the upper cover 23 of the arc-extinguishing chamber 2, and the upper fastening structure 3 is not arranged. With this structure, the arc-extinguishing chamber can be reliably installed in the housing, and the area below the front part of the upper cover 23 of the arc-extinguishing chamber 2 is not occupied by the upper fastening structure 3, so that more arc-extinguishing vanes can be arranged in the arc-extinguishing chamber to further improve the breaking capacity.

[0038] Embodiment 3

[0039] In this embodiment, the lower fastening structure 4 includes a rivet 43, and the rivet 43 is used to rivet and fix the arc-extinguishing chamber 2 to the housing 1, such as press riveting. The use of the rivet for installation further reduces the installation difficulty.

[0040] Embodiment 4

[0041] In this embodiment, the upper cover 23 and the fastening nut 22 are integrally formed.

[0042] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not conflict, they should be considered within the scope of the present disclosure.

[0043] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An arc-extinguishing chamber installation structure, comprising a housing (1) and an arc-extinguishing chamber (2), wherein the arc-extinguishing chamber (2) is installed in an arc-extinguishing chamber installation space (1a) within the housing (1), characterized in that: The arc-extinguishing chamber (2) is also provided with a lower fastening structure (4) on its rear side. The lower fastening structure (4) can be installed from back to front so that the arc-extinguishing chamber (2) is fixed in the arc-extinguishing chamber installation space (1a) inside the housing (1). The lower fastening structure (4) can increase the area in which the arc-extinguishing grid plates can be arranged in the inner cavity of the arc-extinguishing chamber (2).

2. The arc-extinguishing chamber installation structure according to claim 1, characterized in that: The upper side of the arc-extinguishing chamber (2) is provided with an upper fastening structure (3), which can be installed from top to bottom to fix the arc-extinguishing chamber (2) in the arc-extinguishing chamber installation space (1a) inside the housing (1).

3. The arc-extinguishing chamber installation structure according to claim 1, characterized in that: The lower fastening structure (4) includes a fastening screw (41), which is inserted from back to front and locks the arc-extinguishing chamber (2) to the housing (1) through a threaded connection.

4. The arc-extinguishing chamber installation structure according to claim 1, characterized in that: The bottom surface of the inner cavity of the housing (1) is provided with a forward-extending boss (11). The boss (11) passes through the through hole (42a) on the current-carrying component (42). The boss (11) is provided with a mounting hole (111) at a position corresponding to the fastening screw (41). The fastening screw (41) passes through the mounting hole (111) from back to front to lock the arc-extinguishing chamber (2) onto the housing (1).

5. The arc-extinguishing chamber installation structure according to claim 4, characterized in that: The upper cover (23) of the arc-extinguishing chamber (2) is provided with a groove (21) corresponding to the mounting hole (111) on the boss (11) on the bottom surface of the inner cavity of the shell (1). A fastening nut (22) is embedded in the groove (21), and the fastening screw (41) passes through the mounting hole (111) and engages with the fastening nut (22) threadedly.

6. The arc-extinguishing chamber installation structure according to claim 2, characterized in that: The upper fastening structure (3) is located on the front part of the upper side of the upper cover (23) of the arc extinguishing chamber (2).

7. The arc-extinguishing chamber installation structure according to claim 1, characterized in that: The lower fastening structure (4) is located on the rear side of the upper cover (23) of the arc-extinguishing chamber (2).

8. The arc-extinguishing chamber installation structure according to claim 1, characterized in that: The upper cover (23) of the arc-extinguishing chamber (2) is provided with a lower fastening structure (4) only on the rear side, and no upper fastening structure (3) is provided.

9. The arc-extinguishing chamber installation structure according to claim 1, characterized in that: The lower fastening structure (4) includes rivets (43) that rivet (43) to fix the arc-extinguishing chamber (2) to the housing (1).

10. The arc-extinguishing chamber installation structure according to claim 5, characterized in that: The top cover (23) and the fastening nut (22) are integrally formed.

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