Installation structure of arc extinguish chamber

Abstract

The utility model discloses a mounting structure of an arc extinguish chamber, the cross section of the arc extinguish chamber is matched with the cross section of an arc extinguish cavity, the two sides of the arc extinguish chamber are provided with limiting ribs extending out of the arc extinguish cavity, and the arc extinguish chamber is fixed in the arc extinguish cavity of a shell from the two sides through the cooperation of a fixed pressing block and the limiting ribs. The length and the width of the arc extinguish chamber cannot be reduced due to the arrangement of the fixing piece, so that the size of the original arc extinguish cavity is kept unchanged, the length and the width can be increased as much as possible while the arc extinguish chamber can be arranged in the arc extinguish cavity, and meanwhile, the height of the arc extinguish chamber extending out of the arc extinguish cavity can be increased, so that the volume of the arc extinguish chamber is increased, and the service life of the arc extinguish chamber is prolonged. Therefore, the arc extinguishing chamber can accommodate more arc extinguishing grid sheets, and the breaking voltage is improved. Furthermore, the opposite limiting ribs of the two adjacent arc extinguish chambers are connected and matched through a fixed pressing block, so that the two adjacent arc extinguish chambers can be synchronously fixed on the shell through a fixed pressing block, and the installation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of isolating switches, in particular to an arc extinguishing chamber structure of an isolating switch. Background Art

[0002] In the traditional low-voltage electrical field, DC can usually only reach DC1500V. According to the latest low-voltage electrical industry standard development plan, today's low-voltage electrical appliances will develop to DC3000V, while existing disconnectors can usually only reach DC750V and DC1500V, which cannot meet the needs of low-voltage electrical appliances above DC2000V. Disconnectors usually use 4 pairs of moving and static contacts, namely 4P disconnectors, which are larger in size and higher in cost. If the disconnector uses 2 pairs of moving and static contacts, namely 2p disconnectors, it can effectively reduce the size and cost, but the voltage borne by each pair of moving and static contacts will increase.

[0003] Combine Figure 1a and Figure 1b Taking DC1500V as an example, using a 4P / DC1500V disconnector, each pole withstands an average voltage of 375V, while using a 2P / DC1500V disconnector, each pole needs to withstand a voltage of 750V. Therefore, in order to make the 2P disconnector reach above DC2000V and ensure safety and reliability, the number of arc extinguishing grids in each pole interrupter needs to be increased to improve the voltage breaking capacity of the 2P disconnector.

[0004] The existing arc extinguishing chamber structure is as follows Figure 2 As shown, the arc extinguishing chamber 1' is fixed to the housing 3' through the mounting holes 2' or mounting parts provided at both ends of the arc extinguishing chamber 1', so that the length of the arc extinguishing chamber 1' is reduced due to the provision of the mounting holes 2', so that the volume of the existing arc extinguishing chamber is smaller, and therefore the number of arc extinguishing grids that can be accommodated is limited, the breaking voltage is low, and cannot meet the breaking voltage required by the 2P disconnector; at the same time, in the existing arc extinguishing chamber structure, each arc extinguishing chamber 1' is separately installed on the housing 3' through the corresponding mounting holes 2' or mounting parts, and the installation process is cumbersome and inefficient.

[0005] Therefore, how to effectively increase the volume of the arc extinguishing chamber, improve the breaking voltage of the arc extinguishing chamber, and enable rapid installation of multiple arc extinguishing chambers has become an urgent problem to be solved in this field. Utility Model Content

[0006] In view of the defects of the prior art, the purpose of the present invention is to provide an installation structure for an arc extinguishing chamber, which makes the arc extinguishing chamber larger in volume, can accommodate more arc extinguishing grids, improves the breaking voltage, and is simple and quick to install.

[0007] In order to achieve the above-mentioned purpose, the arc extinguishing chamber structure provided by the present invention includes a housing and a plurality of arc extinguishing chambers correspondingly arranged in a plurality of arc extinguishing cavities of the housing, characterized in that:

[0008] The cross-section of the arc extinguishing chamber is adapted to the cross-section of the arc extinguishing cavity body. Limiting ribs extending out of the arc extinguishing cavity are respectively provided on both sides of the arc extinguishing chamber. A fixed pressure block is provided on the limiting ribs. The top surface of the fixed pressure block is provided with a mounting hole for connecting to the shell. The arc extinguishing chamber is fixed to the shell by cooperating with the fixed pressure block and the limiting ribs.

[0009] Furthermore, a connecting groove adapted to the limiting rib is provided on the bottom surface of the fixed pressing block, and the limiting ribs opposite to each other in two adjacent arc-extinguishing chambers are connected and matched via a fixed pressing block.

[0010] Furthermore, the arc extinguishing chamber includes a plurality of arc extinguishing chambers arranged in parallel, and the fixed pressing blocks include end pressing blocks for fixing end arc extinguishing chambers and middle pressing blocks for synchronously fixing adjacent arc extinguishing chambers.

[0011] Furthermore, the arc extinguishing chamber includes two end arc extinguishing chambers arranged in parallel, and the fixed pressing block includes an end pressing block for fixing the end arc extinguishing chambers and a middle pressing block for synchronously fixing two adjacent end arc extinguishing chambers.

[0012] Furthermore, the arc extinguishing chamber includes two end arc extinguishing chambers and at least one middle arc extinguishing chamber arranged in parallel, and the fixed pressing blocks include end pressing blocks for fixing the end arc extinguishing chambers and middle pressing blocks for synchronously fixing adjacent arc extinguishing chambers.

[0013] Furthermore, one end of the end pressing block is provided with a connecting groove and the other end is provided with a mounting hole, and both ends of the middle pressing block are provided with connecting grooves respectively and the middle is provided with a mounting hole.

[0014] Furthermore, the fixed pressing block is composed of a first pressing block and a second pressing block respectively arranged at both ends of the limiting rib.

[0015] Furthermore, the housing is provided with a locking hole for cooperating with the fixed pressure block, and a nut is provided in the locking hole so that the bolt can pass through the mounting hole on the fixed pressure block and be fixed in the locking hole with the nut.

[0016] Furthermore, the fixed pressing block is composed of a strip-shaped pressing block covering the limiting rib.

[0017] Furthermore, the fixed pressing block is provided with a placement groove for placing the phase partition.

[0018] The arc extinguishing chamber structure provided by the utility model has a cross-section that is adapted to the cross-section of the arc extinguishing cavity. Limiting ribs extending out of the arc extinguishing cavity are provided on both sides of the arc extinguishing chamber. The arc extinguishing chamber is fixed in the arc extinguishing cavity of the shell from both sides by means of a fixed pressure block in cooperation with the limiting ribs, so that the length and width of the arc extinguishing chamber will not be reduced due to the provision of fixing parts. Thus, the original size of the arc extinguishing cavity is kept unchanged. While the arc extinguishing chamber can be placed in the arc extinguishing cavity, the length and width can be increased as much as possible. At the same time, the height of the arc extinguishing chamber extending out of the arc extinguishing cavity can be increased, thereby increasing the volume of the arc extinguishing chamber, so that the arc extinguishing chamber can accommodate more arc extinguishing grids, thereby improving the breaking voltage.

[0019] Furthermore, in the arc extinguishing chamber structure provided by the present invention, the relative limiting ribs of two adjacent arc extinguishing chambers are connected and matched by a fixed pressing block, so that the two adjacent arc extinguishing chambers can be synchronously fixed to the shell through a fixed pressing block, thereby improving installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1a and Figure 1b Schematic diagram of the voltage withstanding for the isolating switch;

[0022] Figure 2 This is an overall schematic diagram of the installation structure of the existing arc extinguishing chamber;

[0023] Figure 3 This is an overall schematic diagram of the first embodiment of the installation structure of the arc extinguishing chamber provided by the utility model;

[0024] Figure 4 This is a schematic structural diagram of the arc extinguishing chamber in the present utility model;

[0025] Figure 5 It is a partial enlarged view of 3;

[0026] Figure 6 This is an overall schematic diagram of a second embodiment of the installation structure of the arc extinguishing chamber provided by the present utility model;

[0027] Figure 7 for Figure 6 A partial enlarged view of .

[0028] Reference numerals:

[0029] 1. Housing; 11. Locking hole;

[0030] 2. Arc extinguishing cavity;

[0031] 3. Arc extinguishing chamber; 31. Limiting rib; 32. End arc extinguishing chamber; 33. Middle arc extinguishing chamber;

[0032] 4. Fixed pressing block; 41. Connecting groove; 42. Mounting hole; 43. End pressing block; 44. Middle pressing block; 441. Placement groove; 45. First pressing block; 46. Second pressing block; 47. Strip pressing block; DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0034] Example 1

[0035] See also Figure 3 , which shows the first embodiment of the installation structure of the arc extinguishing chamber provided by the utility model.

[0036] As can be seen from the figure, the installation structure of the arc extinguishing chamber of this example mainly includes a shell 1, a plurality of arc extinguishing chambers 3 correspondingly arranged in the plurality of arc extinguishing cavities 2 of the shell 1, and a fixing pressure block 4 for fixing the arc extinguishing chambers 3.

[0037] Combine Figure 4 The cross-section of the arc extinguishing chamber 3 is preferably adapted to the cross-section of the arc extinguishing cavity 2, and limiting ribs 31 extending out of the arc extinguishing cavity 2 are respectively provided on both sides of the arc extinguishing chamber 3, so that when the arc extinguishing chamber 3 is placed in the arc extinguishing cavity 2, the limiting ribs 31 can be erected on the shell 1 outside the arc extinguishing cavity 2 to position the two sides of the arc extinguishing chamber 3, and a fixed pressure block 4 is provided on the limiting rib 31. The fixed pressure block 4 cooperates with the limiting rib 31 to fix the arc extinguishing chamber 3 on the shell 1 from both sides, so that the arc extinguishing chamber 3 does not need to be provided with other fixing parts in terms of length and width, thereby increasing the length and width of the arc extinguishing chamber 3 as much as possible to adapt to the arc extinguishing cavity 2, and at the same time, the height of the arc extinguishing chamber 3 extending out of the arc extinguishing cavity can be increased, thereby increasing the overall volume of the arc extinguishing chamber 3, accommodating more arc extinguishing grids, and improving the breaking voltage.

[0038] Furthermore, the relative limiting ribs 31 of two adjacent arc extinguishing chambers 3 are connected and matched through one or more fixed pressing blocks 4, so that the two adjacent arc extinguishing chambers 3 can be synchronously fixed on the housing 1 through one or more fixed pressing blocks 4, thereby improving installation efficiency.

[0039] Among them, combined Figure 5 The bottom surface of the fixed pressure block 4 is provided with a connecting groove 41 adapted to the limiting rib 31, and the top surface is provided with a mounting hole 42 for connecting to the shell 1, so that the limiting rib 31 can be inserted into the connecting groove 41 of the fixed pressure block 4. The fixed pressure block 4 presses the limiting rib 31 through the connecting groove 41 and connects to the shell 1 by inserting bolts into the mounting hole 42, thereby fixing the arc extinguishing chamber 3 on the shell 1.

[0040] Furthermore, a locking hole 11 corresponding to the fixed pressure block 4 is provided on the shell 1, and the locking hole 11 can accommodate a nut. The nut is placed in the locking hole 11, and the bolt is passed through the mounting hole 42 on the fixed pressure block 4 and fixed to the nut, thereby fixing the fixed pressure block 4 on the shell 1 and fixing the arc extinguishing chamber 3 on the shell 1.

[0041] In this embodiment, the cross-sectional shape of the locking hole 11 is substantially equivalent to the cross-sectional shape of the nut and the shape of the bolt shank. For example, the lower portion of the locking hole 11 is equivalent to the shape of the nut, and the upper portion is equivalent to the shape of the bolt shank, so that the placed nut can be stuck and cannot move up and down, but can only move forward and backward, into or out of the locking hole 11, which is convenient for fixing the bolt (see Figure 5 or Figure 6 ).

[0042] Specifically, the arc extinguishing chamber 3 includes end arc extinguishing chambers 32 arranged in parallel on the housing 1. Figure 5 In some embodiments, there are only two arc extinguishing chambers 3 , and both arc extinguishing chambers 3 are end arc extinguishing chambers 32 , which are arranged at both ends of the housing 1 .

[0043] See also Figure 6 In other embodiments, two end arc-extinguishing chambers 32 are provided at both ends of the housing 1 , and a plurality of middle arc-extinguishing chambers 33 are provided between the two end arc-extinguishing chambers 32 .

[0044] The fixed pressing block 4 includes an end pressing block 43 for fixing the outer side of the end arc extinguishing chamber 32 and a fixing block 44 for synchronously fixing the adjacent arc extinguishing chamber ( Figure 5 The opposite sides of the two adjacent end arc extinguishing chambers 32, Figure 6 The middle pressing block 44 is on the opposite side of the end arc extinguishing chamber 32 and the middle arc extinguishing chamber 33 or the opposite side of the two middle arc extinguishing chambers 33).

[0045] For details, see Figure 5 In this example, the arc extinguishing chamber 3 includes two end arc extinguishing chambers 32 arranged in parallel on the housing 1 , and the two end arc extinguishing chambers 32 are respectively provided at two ends of the housing 1 .

[0046] Furthermore, a connecting groove 41 is provided on the bottom surface of one end of the end pressure block 43, and a mounting hole 42 is provided on the other end, so that the end pressure block 43 is connected to the limiting rib 31 on the outside of the end arc extinguishing chamber 32 through the connecting groove 41, and a bolt is inserted through the mounting hole 42 to connect the nut in the locking hole 11 of the shell 1 to fix the outside of the end arc extinguishing chamber 32.

[0047] Correspondingly, the two ends of the middle pressure block 44 are respectively provided with connecting grooves 41, and the middle is provided with a mounting hole 42, so that the middle pressure block 44 is respectively connected to the limiting ribs 31 on the inner side of the two adjacent end arc extinguishing chambers 32 through the connecting grooves 41 at both ends, and the bolts are inserted through the mounting holes 42 to connect the nuts in the locking holes 11 of the shell 1, so that the two adjacent end arc extinguishing chambers 32 are synchronously fixed through the middle pressure block 44 to improve the installation efficiency.

[0048] It can be seen that, while maintaining the original size of the arc-extinguishing cavity 2, the length and width of the end arc-extinguishing chamber 32 are increased as much as possible to adapt to the arc-extinguishing cavity 2, and the end arc-extinguishing chamber 32 is fixed to the housing 1 by the fixed pressure block 4 to increase the volume of the end arc-extinguishing chamber 32 and accommodate more arc-extinguishing grids, thereby improving the breaking voltage of the arc-extinguishing chamber 3.

[0049] In this example, the end pressure block 43 and the middle pressure block 44 are respectively composed of two pressure blocks arranged at the two ends of the corresponding limiting ribs 31, that is, the fixed pressure block 4 is composed of a first pressure block 45 and a second pressure block 46 respectively arranged at the two ends of the limiting rib 31 of the arc extinguishing chamber 3, so that the first pressure block 45 and the second pressure block 46 can respectively fix the two ends of the limiting rib 31, thereby reducing the manufacturing cost of the fixed pressure block 4. At the same time, the four sides of the arc extinguishing chamber 3 are fixed by the end pressure block 43 and the middle pressure block 44, thereby improving the fixing strength.

[0050] Example 2

[0051] See also Figure 6 On the basis of the first embodiment, in this example, the arc extinguishing chamber 3 includes two end arc extinguishing chambers 32 respectively arranged at both ends of the housing 1, and a middle arc extinguishing chamber 33 arranged between the two end arc extinguishing chambers 32.

[0052] Furthermore, the end pressure block 43 and the middle pressure block 44 are respectively composed of a pressure block that is integrally covered on the corresponding limiting rib 31, that is, the fixed pressure block 4 is composed of a strip pressure block 47 covering the limiting rib 31, so that the fixed pressure block 4 can be set as a whole on the limiting rib 31, quickly fix the arc extinguishing chamber 3, and improve the installation efficiency.

[0053] In this example, the locking hole 11 on the shell 1 is only set at a position corresponding to the middle pressure block 44, and a number of mounting holes 42 are evenly distributed on the end pressure block 43, so that after the middle pressure block 44 is connected to the limiting rib 31, it is fixed by bolts and nuts in the locking hole 11 on the shell 1, and after the end pressure block 43 is connected to the limiting rib 31, the screw passes through the mounting hole 42 on the end pressure block 43 to directly fasten the connection to the shell 1, further improving the installation efficiency.

[0054] Specifically, the end pressing block 43 is connected to the limiting rib 31 outside the end arc extinguishing chamber 32 through the connecting groove 41 , and a screw is inserted through the mounting hole 42 to directly fasten the connecting housing 1 to fix one side of the end arc extinguishing chamber 32 .

[0055] Correspondingly, the middle pressure block 44 is connected to the limiting rib 31 on the inner side of the end arc extinguishing chamber 32 and the limiting rib 31 in the middle arc extinguishing chamber 33 opposite to the end arc extinguishing chamber 32 through the connecting grooves 41 at both ends, and the bolts are inserted through the mounting holes 42 to connect the nuts in the locking holes 11 of the shell 1, thereby synchronously fixing the end arc extinguishing chamber 32 and the middle arc extinguishing chamber 33 to improve the installation efficiency.

[0056] The fixed pressing block 4 is provided with a placement groove 441 for placing the phase partition.

[0057] Furthermore, a placement groove 441 is provided on the middle pressing block 44 so that the phase partition can be placed in the placement groove 441 to separate two adjacent arc extinguishing chambers 3 and ensure that the operation of the two adjacent arc extinguishing chambers 3 is not affected.

[0058] Furthermore, the end pressing block 43 is also provided with an installation groove 441 so that the phase partition can be set in the installation groove 441 to isolate the end arc extinguishing chamber 32 from the outside of the switch, ensuring that the outside of the switch is not affected by the operation of the end arc extinguishing chamber 32.

[0059] Furthermore, a placement groove 441 is provided on the strip-shaped pressing block 47 .

[0060] Example 3

[0061] On the basis of the second embodiment, the locking hole 11 is not provided on the shell 1, and a plurality of mounting holes 42 are evenly distributed on the end pressure block 43 and the middle pressure block 44, so that after the end pressure block 43 and the middle pressure block 45 are connected to the limiting rib 31, the shell 1 can be directly fastened by screws passing through the mounting holes 42 without the need to cooperate with nuts, thereby further improving the installation efficiency.

[0062] It can be seen that the installation structure of the arc extinguishing chamber provided by the utility model adopts a variety of structural forms of fixed pressure blocks 4 to cooperate with the arc extinguishing chamber 3, tightly connect the limiting ribs 31 on both sides of the arc extinguishing chamber 3, and fix them on the shell 1, so as to ensure that the length and width of the arc extinguishing chamber 3 are not affected by the installation and are increased as much as possible, and the height of the arc extinguishing chamber 3 can be increased to accommodate more arc extinguishing grids and increase the breaking voltage; at the same time, the two adjacent arc extinguishing chambers 3 are connected and cooperated through a fixed pressure block 4, and the two adjacent arc extinguishing chambers 3 are synchronously fixed to improve the installation efficiency.

[0063] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An arc extinguishing chamber installation structure, comprising a housing (1) and a plurality of arc extinguishing chambers (3) correspondingly arranged in a plurality of arc extinguishing cavities (2) of the housing (1), characterized in that: The cross section of the arc extinguishing chamber (3) is adapted to the cross section of the arc extinguishing cavity (2); limiting ribs (31) extending out of the arc extinguishing cavity (2) are respectively provided on both sides of the arc extinguishing chamber (3); a fixed pressure block (4) is provided on the limiting rib (31); the fixed pressure block (4) is connected to the housing (1); and the arc extinguishing chamber (3) is fixed to the housing (1) by the fixed pressure block (4) cooperating with the limiting rib (31).

2. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The bottom surface of the fixed pressing block (4) is provided with a connecting groove (41) adapted to the limiting rib (31).

3. The arc extinguishing chamber installation structure according to claim 2, characterized in that: The arc extinguishing chamber (3) comprises a plurality of arc extinguishing chambers (3) arranged in parallel, and the fixed pressing block (4) comprises an end pressing block (43) for fixing the end arc extinguishing chamber (32) and a middle pressing block (44) for synchronously fixing adjacent arc extinguishing chambers (3).

4. The arc extinguishing chamber installation structure according to claim 3, characterized in that: The arc extinguishing chamber (3) comprises two end arc extinguishing chambers (32) arranged in parallel, and the fixed pressing block (4) comprises an end pressing block (43) for fixing the end arc extinguishing chambers (32) and a middle pressing block (44) for synchronously fixing two adjacent end arc extinguishing chambers (32).

5. The arc extinguishing chamber installation structure according to claim 3, characterized in that: The arc extinguishing chamber (3) comprises two end arc extinguishing chambers (32) and at least one middle arc extinguishing chamber (33) arranged in parallel, and the fixed pressing block (4) comprises an end pressing block (43) for fixing the end arc extinguishing chambers (32) and a middle pressing block (44) for synchronously fixing adjacent arc extinguishing chambers (3).

6. The arc extinguishing chamber installation structure according to claim 3, characterized in that: The end pressing block (43) is provided with a connection groove (41) at one end and a mounting hole (42) at the other end; the middle pressing block (44) is provided with connection grooves (41) at both ends and a mounting hole (42) at the middle.

7. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The fixed pressing block (4) is composed of a first pressing block (45) and a second pressing block (46) respectively arranged at both ends of the limiting rib (31).

8. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The housing (1) is provided with a locking hole (11) for cooperating with the fixed pressure block (4), and a nut is provided in the locking hole (11) so that a bolt can pass through the mounting hole (42) on the fixed pressure block (4) and be fixed in the locking hole (11) with the nut.

9. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The fixed pressing block (4) is composed of a strip-shaped pressing block (47) covering the limiting rib (31).

10. The arc extinguishing chamber installation structure according to claim 1, characterized in that: The fixed pressing block (4) is provided with a placement groove (441) for placing the phase partition.

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