Insulator structure for fixing static end of circuit breaker

Abstract

The invention discloses an insulator structure for fixing a static end of a circuit breaker. An insulator comprises a basin-type insulator, a conductive insert and a sealing mechanism, the conductive insert is embedded in the middle of the basin-type insulating part; the middle part of the conductive insert is provided with an observation window with two through ends, and the sealing mechanism is locked and installed in the observation window for sealing and fixing. After the insulator structure, a circuit breaker supporting seat and other static end components are assembled into a circuit breaker static end, when the whole circuit breaker static end is installed in a circuit breaker shell, the position of the push-pull rod can be observed through the observation window, the push-pull rod can be accurately inserted into a guide rail clamping groove, and testing detection is conducted after the push-pull rod is invalid. And then the insulator is locked on the circuit breaker shell, and then the sealing mechanism is locked and fixed on the observation window to seal the observation window, so that the air isolation effect of the insulator is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breakers, in particular to an insulator structure for fixing a static end of a circuit breaker. Background Art

[0002] The structure of a horizontal circuit breaker is generally divided into a moving end side and a static end side. The moving end side is driven by a mechanism to perform opening and closing actions, while the static end is composed of static end contacts, etc., and insulating parts are provided at both ends as supports. Since the arc extinguishing chamber of the circuit breaker adopts the latest generation of double-acting self-energizing arc extinguishing method "double-acting contact structure + thermal expansion + blowing assistance", in order to drive the static arc contact of the static end to move, a push-pull rod needs to be installed on the moving end, and then inserted into the guide rail slot of the static end, so as to drive the static arc contact to move when the moving end moves. However, when assembling the existing circuit breaker, it is impossible to observe whether the push-pull rod is accurately inserted into the guide rail slot, and later testing and inspection are required.

[0003] At the same time, when the static end insulation of the circuit breaker is used as the loop interface, since the circuit breaker requires a separate gas chamber and cannot share the gas chamber with other switches or transformers, the insulation of the static end needs to play a gas isolation role in addition to its supporting function. Summary of the invention

[0004] The object of the present invention is to provide an insulator structure for fixing a static end of a circuit breaker, which has the advantage of facilitating the installation and matching of a push-pull rod and a guide rail slot.

[0005] In order to achieve the above object, the solution of the present invention is: An insulator structure for fixing a static end of a circuit breaker, the insulator comprising a pot-type insulating member, a conductive insert and a sealing mechanism; The conductive insert is embedded in the middle of the pot-type insulating member; the conductive insert is provided with an observation window with two ends passing through in the middle, and the sealing mechanism is locked and installed in the observation window for sealing and fixing.

[0006] Furthermore, the sealing mechanism includes a sealing block and a fixed plate; the sealing block is sealed in the observation window; the side wall of the observation window is provided with a protruding step on the inner side of the sealing block, and the step is used to limit and prevent the sealing block from moving inward; the side wall of the observation window is provided with a concave groove on the outer side of the sealing block, the fixed plate is installed on the outer side of the sealing block and clamped in the groove, and the fixed plate is used to limit the sealing block from moving outward.

[0007] Furthermore, there are two fixing plates; the two fixing plates are respectively installed on the outside of the sealing block and spaced from each other, and one side of the fixing plate is clamped in the groove, and the other side is against the outer side of the sealing block, and the part of the fixing plate against the outer side of the sealing block is provided with a through hole; and the outer side of the sealing block is provided with locking holes corresponding to the through holes of the two fixing plates; a number of mounting screws pass through the through holes of the fixing plates and are locked in the locking holes of the sealing block.

[0008] Furthermore, the observation window is a circular hole; the fixing plate is a semicircular plate, and the diameter of the fixing plate is not greater than the diameter of the observation window.

[0009] Furthermore, the fixing plate is provided with two through holes, and the outer side surface of the sealing block is provided with four locking holes.

[0010] Furthermore, the outer wall of the sealing block is provided with at least one elastic sealing ring.

[0011] Furthermore, a shielding ring and a double-channel sealing groove are provided on the edge of the pot-type insulating component, and a flange is provided on the outer periphery; and a plurality of evenly distributed mounting countersunk holes and mounting through holes are provided on the flange.

[0012] Furthermore, the pot-type insulating member is made of epoxy resin.

[0013] After adopting the above technical scheme, after assembling the insulator structure of the present invention and the static end components such as the circuit breaker support seat into the static end of the circuit breaker, the sealing mechanism is not installed in the observation window first. By utilizing the observation window in the middle of the insulator, when the static end of the circuit breaker is installed as a whole into the circuit breaker housing, the position of the push-pull rod can be observed through the observation window, so that the push-pull rod can be accurately inserted into the guide rail slot, and subsequent testing and inspection are performed if it is invalid; then the insulator is locked on the circuit breaker housing, and then the sealing mechanism is locked and fixed on the observation window to seal the observation window to ensure the air isolation effect of the insulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a cross-sectional view of an embodiment of the present invention; Figure 2 A schematic diagram of an embodiment of the present invention installed in a circuit breaker; Figure 3 is a schematic diagram of two fixing plates according to an embodiment of the present invention; Figure 4 Schematic diagram of the installation steps of an embodiment of the present invention (I); Figure 5 Schematic diagram of installation steps of an embodiment of the present invention (II); Figure 6 Schematic diagram of installation steps of an embodiment of the present invention (III); Figure 7 Schematic diagram of installation steps of an embodiment of the present invention (IV).

[0015] Explanation of reference numerals: insulator 10, pot-type insulating part 1, shielding ring 11, double-channel sealing groove 12, flange 13, mounting countersunk hole 131, mounting through hole 132, conductive insert 2, observation window 21, step 22, groove 23, sealing mechanism 3, sealing block 31, locking hole 311, elastic sealing ring 312, sealing ring groove 313, fixing plate 32, through hole 321, mounting screw 33, static end component 4, circuit breaker static end 20, circuit breaker housing 30, circuit breaker moving end 40, push-pull rod 50, guide rail slot 60. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0017] like Figure 1 and Figure 2 As shown, an insulator structure for fixing the static end of a circuit breaker is provided in this embodiment. The insulator 10 comprises a pot-type insulating member 1, a conductive insert 2 and a sealing mechanism 3. The conductive insert 2 is embedded in the middle of the pot-type insulating member 1 and is used to install static end components 4 such as static end contacts; an observation window 21 with two ends passing through is provided in the middle of the conductive insert 2, and the sealing mechanism 3 is locked and installed in the observation window 21 for sealing and fixing.

[0018] Therefore, after the insulator 10 structure of the present invention is assembled with the static end components 4 such as the circuit breaker support seat into the circuit breaker static end 20, the sealing mechanism 3 is not installed in the observation window 21 at first. By utilizing the observation window 21 provided in the middle of the insulator 10, when the circuit breaker static end 20 is installed as a whole into the circuit breaker housing 30, the position of the push-pull rod 50 of the circuit breaker moving end 40 can be observed through the observation window 21, so that the push-pull rod 50 can be accurately inserted into the guide rail slot 60, and if it is invalid, subsequent testing and inspection can be performed; then the insulator 10 is locked on the circuit breaker housing 30, and then the sealing mechanism 3 is locked and fixed to the observation window 21, and the observation window 21 is sealed to ensure the air isolation effect of the insulator 10.

[0019] In this embodiment, the pot-shaped insulating member 1 may be made of epoxy resin and may be cast around the outer periphery of the conductive insert 2 .

[0020] The sealing mechanism 3 includes a sealing block 31 and a fixing plate 32; the sealing block 31 is sealed in the observation window 21; the side wall of the observation window 21 is provided with a protruding step 22 on the inner side of the sealing block 31, and the step 22 is used to limit and prevent the sealing block 31 from moving inward; the side wall of the observation window 21 is provided with a concave groove 23 on the outer side of the sealing block 31, and the fixing plate 32 is installed on the outer side of the sealing block 31 and clamped in the groove 23, and the fixing plate 32 is used to limit the outward movement of the sealing block 31. The sealing block 31 can be provided to fully seal the observation window 21, and the position of the sealing block 31 can be fixed by cooperating with the step 22 and the fixing plate 32.

[0021] In order to improve the fixing effect of the fixing plate 32, the fixing plates 32 of this embodiment are two; Figure 3 The fixing plate 32 may also be a semicircular plate, and the observation window 21 may be a circular hole, the corresponding step 22 may be a circular step, and the groove 23 may be an annular groove; the diameter of the fixing plate 32 is not larger than the diameter of the observation window 21, so that the fixing plate 32 can be installed in the observation window 21.

[0022] The two fixing plates 32 can be respectively installed on the outside of the sealing block 31 and spaced from each other, and one side of the fixing plate 32 is clamped in the groove 23, and the other side is against the outer side of the sealing block 31. The part of the fixing plate 32 against the outer side of the sealing block 31 can be provided with a through hole 321; in this embodiment, each fixing plate 32 is provided with two through holes 321.

[0023] The outer side of the sealing block 31 is provided with locking holes 311 corresponding to the through holes 321 of the two fixing plates 32 ; in this embodiment, the outer side of the sealing block 31 may be provided with four locking holes 311 .

[0024] A plurality of mounting screws 33 are passed through the through holes 321 of the fixing plate 32 and then locked in the locking holes 311 of the sealing block 31. The fixing plate 32 can achieve a fixing and limiting effect on the sealing block 31.

[0025] In this embodiment, at least one elastic sealing ring 312 is disposed on the outer wall of the sealing block 31 to achieve a good sealing effect. Specifically, two sealing ring grooves 313 may be disposed on the outer wall of the sealing block 31 , and an elastic sealing ring 312 is disposed on each sealing ring groove 313 .

[0026] In this embodiment, the edge of the pot-type insulating member 1 may be provided with a shielding ring 11 and a double-channel sealing groove 12 to improve the airtight reliability; the outer periphery of the pot-type insulating member 1 is provided with a flange 13; the flange 13 is provided with a plurality of evenly distributed mounting countersunk holes 131 and mounting through holes 132. This facilitates the installation and fixing of the insulator 10 and the circuit breaker housing 30. The arrangement of the mounting countersunk holes 131 and the mounting through holes 132 may refer to the prior art.

[0027] like Figures 4 to 7 As shown, the specific installation steps of assembling a circuit breaker using the insulator 10 of the present invention can be as follows: Step 1: Remove the sealing block 31 , the fixing plate 32 and the mounting screws 33 of the insulator 10 , and then assemble the pot-type insulating component 1 and the conductive insert 2 with the static end components 4 such as the circuit breaker support seat into the circuit breaker static end 20 .

[0028] Step 2: The static end 20 of the circuit breaker begins to fall and dock with the top opening of the vertically placed circuit breaker housing 30. The position of the push-pull rod 50 of the circuit breaker moving end 40 is observed through the observation window 21. After the push-pull rod 50 is accurately inserted into the guide rail slot 60, the mounting countersunk holes 131 and the mounting through holes 132 of the outer flange 13 of the basin-type insulating component 1 are locked with the connecting screws of the circuit breaker housing 30, and then the circuit breaker is restored to a lying state.

[0029] Step 3: Reinstall the sealing block 31 , the fixing plate 32 and the mounting screws 33 of the insulator 10 to the observation window 21 of the conductive insert 2 to seal the observation window 21 .

[0030] In summary, by adopting the above structure, the position of the movable end push-pull rod 50 can be easily observed, and the push-pull rod 50 can be accurately inserted into the guide rail slot 60 to ensure reliable assembly of the circuit breaker.

[0031] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the present invention should still belong to the protection scope of the present invention.

[0032] In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

Claims

1. An insulator structure for fixing the static end of a circuit breaker, characterized in that: The insulator comprises a pot-type insulating member, a conductive insert and a sealing mechanism; The conductive insert is embedded in the middle of the pot-type insulating member; the conductive insert is provided with an observation window with two ends passing through in the middle, and the sealing mechanism is locked and installed in the observation window for sealing and fixing.

2. An insulator structure for fixing the static end of a circuit breaker according to claim 1, characterized in that: The sealing mechanism includes a sealing block and a fixing plate; the sealing block is sealed in the observation window; the side wall of the observation window is provided with a protruding step on the inner side of the sealing block, and the step is used to limit and prevent the sealing block from moving inward; the side wall of the observation window is provided with a concave groove on the outer side of the sealing block, the fixing plate is installed on the outer side of the sealing block and clamped in the groove, and the fixing plate is used to limit the sealing block from moving outward.

3. An insulator structure for fixing the static end of a circuit breaker according to claim 2, characterized in that: There are two fixing plates; the two fixing plates are respectively installed on the outside of the sealing block and spaced from each other, and one side of the fixing plate is clamped in the groove, and the other side is against the outer side of the sealing block, and the part of the fixing plate against the outer side of the sealing block is provided with a through hole; and the outer side of the sealing block is provided with locking holes corresponding to the through holes of the two fixing plates; a number of mounting screws pass through the through holes of the fixing plates and are locked in the locking holes of the sealing block.

4. The insulator structure for fixing the static end of a circuit breaker according to claim 3, characterized in that: The observation window is a circular hole; the fixing plate is a semicircular plate, and the diameter of the fixing plate is not greater than the diameter of the observation window.

5. The insulator structure for fixing the static end of a circuit breaker according to claim 3, characterized in that: The fixing plate is provided with two through holes, and the outer side surface of the sealing block is provided with four locking holes.

6. The insulator structure for fixing the static end of a circuit breaker according to claim 2, characterized in that: The outer wall of the sealing block is provided with at least one elastic sealing ring.

7. The insulator structure for fixing the static end of a circuit breaker according to claim 1, characterized in that: The edge of the pot-type insulating member is provided with a shielding ring and a double-channel sealing groove, and the outer periphery is provided with a flange; the flange is provided with a plurality of evenly distributed mounting countersunk holes and mounting through holes.

8. An insulator structure for fixing a static end of a circuit breaker according to any one of claims 1 to 7, characterized in that: The pot-type insulating member is made of epoxy resin.

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