CN204230142U - For the pole shell of circuit breaker - Google Patents

Abstract

In order to improve a pole shell (1) for a circuit breaker, the pole shell is used to accommodate a vacuum switch tube (2) and a pole head (3) connected to the vacuum switch tube (2) and connected to the vacuum switch tube (2) A connected pole holder with fastening means (13, 14, 15) for fastening the pole head (3) and the vacuum interrupter (2), said pole shell having a simple and inexpensive construction, it is recommended here that the fastening The devices (13, 14, 15) are designed as integrated fixing devices of the pole shell (1) for forming a form-surface fitting connection with the pole head (3) and the vacuum switch tube (2).

Description

Pole housings for circuit breakers

technical field

The utility model relates to a pole shell for a circuit breaker, which is used for accommodating a vacuum switching tube, a pole head connected with the vacuum switch tube, and a pole bracket connected with the vacuum switch tube, and has a structure for fixing the pole head and the vacuum switch tube fixtures.

Background technique

Such a switching pole is known, for example, from WO 2007/016881 A1. The switch pole arrangement disclosed in this document for a circuit breaker (for example a medium voltage circuit breaker) is provided for accommodating a vacuum interrupter as well as a pole head and a pole holder, the pole housing being connected to the vacuum interrupter and having a Fixing means for head and vacuum interrupter, wherein the pole head is fixed on the pole housing by means of a screw connection and the vacuum interrupter is held by a separate centering device fixed on the pole housing.

Contents of the invention

The technical problem to be solved by the present invention is to improve the aforementioned type of pole shell, which has a simple and cheap construction.

The technical problem of the pole shell of the aforementioned form is solved according to the utility model in such a way that the fixing device is designed as an integrated fixing device of the pole shell for forming a form-surface fit connection with the pole head and the vacuum switch tube.

Such a form-fitting integrated fastening device with pole head and vacuum switch is simple and inexpensive on the one hand, since separate components such as a separate centering device can be omitted, and on the other hand, this fastening device can be installed in a simple manner. The pole casing is formed during the production process, for example by being placed in a mold for casting the pole casing. This also results in a greater repeatability of the fastening of the vacuum interrupter and the pole head, so that the dielectric properties of a circuit breaker with such a pole housing can also be improved.

In an advantageous embodiment of the invention, the integrated fixing means comprise a first internal fixing means formed by a bolt seat provided with a recess, wherein the recess has a centering for the horizontal and vertical positioning of the pole head rib.

In another advantageous embodiment of the invention, the integrated fastening device comprises a second internal fastening device for centering the vacuum interrupter supported by the pole housing.

In a particularly advantageous embodiment of the invention, the second internal fastening means has a through-opening for the drive lever of the circuit breaker.

By means of this integrated fastening means with recesses or in other words recesses with centering ribs for horizontal and vertical positioning of the pole heads and centering means for centering the vacuum interrupter supported by the pole housing (the centering element is integrally formed on the pole housing and has a through-opening for the drive rod of the circuit breaker), which enables simple fixing of the pole head and vacuum interrupter or centering of the vacuum interrupter on the pole housing , wherein the integrated structure of the fixing device on the pole shell can achieve simple manufacturing and high repeatability during the casting process of the pole shell, and thus achieve precise positioning during the fixing process.

Description of drawings

The utility model will be further elaborated below in conjunction with the accompanying drawings and embodiments with reference to the accompanying drawings. In the attached picture:

Figure 1 shows a front view of an embodiment of a pole housing;

Figure 2 shows a detailed view of the pole casing of Figure 1; and

Figure 3 shows a further detailed view of the pole housing of Figures 1 and 2; and

FIG. 4 shows a three-dimensional view of the pole housing of FIG. 1 viewed from below.

detailed description

FIG. 1 shows a pole housing for a circuit breaker, for example a medium voltage circuit breaker, which has three switching poles each with a pole housing 1 and is provided for switching on or off the lead-through circuit breaker by means of a vacuum switch 2 The current of the device, each of the switching poles is respectively arranged in a pole shell 1. The vacuum interrupter 2 is electrically conductively connected at its fixed contact terminal pin, not shown, to a terminal head 3, which has a connection terminal 4 for connection to the electrical connection means of the switchgear, a disconnection not further shown in the figure tor used in switchgear. The movable contact terminal pin 5 of the vacuum interrupter tube 2 is configured to be connected to the pole support via a flexible wire, and the pole support is electrically connected to the switchgear in which the circuit breaker is used by means of another connecting device. For the sake of clarity, the pole holder and the flexible wires are not shown in FIG. 1 , only the connection means 6 to 9 for fixing the pole holder are shown. The pole housing 1 has external guiding means 10 and external latching means 11 on both sides of the pole housing, on which the insulating housing can be fastened as an additional insulating part, so that switching is realized by means of the pole housing and the insulating housing, also not shown in the figure Insulation of poles from adjacent switching poles and from components of the circuit breaker at earth potential. The pole housing 1 , with its underside 12 , is bolted to and fastened to the base plate of the circuit breaker by means of additional screw means, also not shown in the figure, and is designed as an electrically insulating movable contact terminal for introducing the drive movement into the vacuum interrupter. The drive rod of the pin 5 extends through said base plate in order to open or close the contact system of the vacuum interrupter 2 . The pole head 3 is fastened to first internal fastening means 13 and 14 , which are explained further with reference to FIGS. 2 and 3 . The vacuum interrupter tube 2 is centered by means of its tube support 16 and held on a second inner fixing means 15 in the form of a centering means, wherein the first inner fixing means 13 and 14 and the second inner fixing means 15 are integrally formed or formed on Pole shell 1.

FIG. 2 shows a detailed view of the pole housing 1 , wherein only the fastening means designated 13 are shown among the first internal fastening means 13 and 14 , which are equipped as screw seats with threaded connections 17 and 18 and has recesses 19 or in other words recesses, on which centering ribs 20 and 21 are formed for horizontally and vertically centering and positioning the pole heads during fastening. The pole head 3 itself has corresponding recesses into which the centering ribs 20 and 21 engage when the pole head is positioned and fixed. Therefore, by designing the centering ribs 20 and 21 as parts of the first fixing devices 13 and 14 integrally arranged on the pole shell, the form-surface fitting connection between the pole head 3 and the pole shell 1 can be formed, thereby having precise positioning and Improved dielectric properties.

FIG. 3 shows a further detailed view of the pole housing 1 from FIGS. 1 and 2 with a recess 19 and centering ribs 20 and 21 and an enlarged view of the screw connections 17 and 18 arranged in the pole housing 1 .

4 shows a three-dimensional view of the pole housing 1 from obliquely below, wherein the second internal fixing means 15 in the form of a centering means for the vacuum interrupter tube 2 is more clearly shown, with a through-through for receiving the tube support 16 The opening 22, wherein the through-opening 22 does not extend completely around the tube support 16, but is open on the side facing the open area of the pole housing 1, is used to simplify the insertion of the vacuum interrupter tube 2 with the tube support 16 and positioned in the centering means of the second internal fixation means 15, wherein a form-fitting connection between the tube support 16 and the second internal fixation means 15 is formed after the insertion of the tube support 16 into the second internal fixation means 15, The vacuum tube or tube support 16 is thus reliably centered and held on the second inner fixing means 15 .

Thus, with the first and second internal fastening means 13 , 14 and 15 designed integrally on the pole housing, a form-fit connection via the pole head or the vacuum interrupter to the internal fastening means can be ensured in a simple, repeatable manner. and a securely positioned fastening, which can be produced inexpensively by simple placement in the casting mold for casting the pole shell 1 .

List of reference signs

1 switch pole

2 vacuum switch tube

3 pole head

4 connections

5 movable contact terminal pin

6 to 9 fixed structure

10 External boot device

11 External locking device

12 fixed structure

13,14 First internal fixation device

15 Second internal fixation device

16 pipe support

17,18 threaded connector

19 recess

20,21 center rib

22 Through port

Claims (4)

1. the pole shell (1) for circuit breaker, it is for the extreme head (3) that holds vacuum switch tube (2) and be connected with vacuum switch tube (2) and the pole support be connected with vacuum switch tube (2), pole support has the immobilising device (13 for fixed pole termination (3) and vacuum switch tube (2), 14,15), it is characterized in that, immobilising device (13,14,15) the integrated immobilising device being designed to pole shell (1) is used for the connection forming form fit with extreme head (3) and vacuum switch tube (2).

2. according to pole according to claim 1 shell (1), it is characterized in that, described integrated immobilising device comprises the first internal fixators part (13 be made up of the bolt block having arranged recess (19), 14), wherein said recess (19) horizontal and vertical had for extreme head (3) locate to middle rib (20,21).

3. according to the pole shell (1) described in claim 1 or 2, it is characterized in that, described integrated immobilising device comprises the second internal fixators part (15) of the vacuum switch tube (2) supported by pole shell (1) for centering.

4. according to pole according to claim 3 shell (1), it is characterized in that, the second internal fixators part (15) has the impenetrating mouth (22) of the drive rod for circuit breaker.