A circumferential self-adapting shorting ring for circuit breaker testing

Abstract

The utility model provides a kind of shorting ring of circumference self-adaption for circuit breaker test, comprising: first connecting rod, with the second connecting rod provided cross activity connection, every first connecting rod and second connecting rod are set as a group, and every group of circumferentially distributed first connecting rod and second connecting rod two ends are movably connected and constitute locking ring;Arc elastic member, corresponding interval is set in the middle intersection of first connecting rod and second connecting rod, first spring is provided between two arc elastic members, and two arc elastic members are used to insert the gap between plum blossom contact, to realize that first spring will two arc elastic members resist between plum blossom contact.The application has ensured that every gap can be accurately corresponding, improves the versatility and installation adaptability of device;Second spring is installed in the two sides of first connecting rod and second connecting rod cross hinged, and continuous radial tightening force is provided by symmetrically arranged extension spring or compression spring, so that locking ring composed of multiple connecting rods is more firmly clamped on the outer circumference of plum blossom contact.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, and in particular to a circumferential adaptive shorting ring for circuit breaker testing. Background Technology

[0002] The plum blossom contact is a component of a circuit breaker, a specialized connection device for high-current tests such as short-circuit and temperature rise tests. It creates a low-impedance loop by externally short-circuiting the circuit breaker's input and output terminals, simulating its current-carrying capacity in a closed state. Its core feature is "circumferential self-adaptation," meaning it uses a flexible structure or multi-directional adjustment design to automatically conform to circular terminals of different diameters, positions, or models, ensuring tight and reliable contact. Compared to traditional fixed short-circuiting tools, this device is more versatile, easier to install, effectively reduces contact resistance, prevents overheating during testing, and improves testing safety and efficiency. It is suitable for testing scenarios requiring frequent sample changes.

[0003] In related technologies, high-purity soft copper wire is often used to reliably short-circuit the L-shaped contacts on the circuit breaker trolley during electrical equipment testing or temporary wiring. The specific procedure is as follows: Select multi-strand copper wire with a cross-sectional area sufficient for current carrying capacity, and tightly wrap it around the conductive rod of the L-shaped contact at least once to ensure full contact surface contact, thereby reducing contact resistance and preventing localized overheating due to high current flow during testing. Subsequently, multiple L-shaped contacts (such as three-phase main contacts) are connected in series using the same or segmented copper wire to form a complete conductive circuit. Each connection point should preferably be crimped with copper wire lugs or secured with bolts to ensure electrical continuity. This short-circuiting method is commonly used for temporary treatment before circuit breaker factory testing, commissioning testing, or circuit resistance testing, ensuring that the tested equipment operates in a safe, equipotential state and preventing malfunctions or hazards from induced current.

[0004] However, this method has obvious drawbacks. The copper wire is fixed by hand winding, resulting in limited contact area and uneven pressure, which can easily lead to excessive contact resistance. During high-current tests, overheating may burn out the copper wire or damage the contacts, causing test failure or even safety accidents. Utility Model Content

[0005] The main purpose of this invention is to provide a circumferential adaptive shorting ring for circuit breaker testing, which solves the problem of series connection of plum blossom contacts.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a circumferential adaptive short-circuit ring for circuit breaker testing, comprising: The first link is movably connected to the provided second link. Each first link and second link is set as a group. The two ends of the circumferentially distributed first link and second link in each group are movably connected to form a locking ring. Arc-shaped springs are correspondingly spaced at the intersection of the first and second links. A first spring is provided between the two arc-shaped springs. The two arc-shaped springs are used to insert into the gap between the plum blossom contacts, so that the first spring holds the two arc-shaped springs against the plum blossom contacts.

[0007] In the preferred embodiment, a first connecting ring is provided in the middle of both the first link and the second link, and the first connecting rings provided on the first link and the second link are arranged to overlap each other.

[0008] In the preferred embodiment, a second connecting ring is fixedly provided at both ends of the first connecting rod and the second connecting rod. When each set of the first connecting rod and the second connecting rod are connected, the second connecting rings overlap each other and are detachably connected. Bearings are sleeved inside both the first connecting ring and the second connecting ring.

[0009] In the preferred embodiment, the arc-shaped spring includes a first arc-shaped spring piece and a second arc-shaped spring piece with corresponding concave surfaces, and both the first arc-shaped spring piece and the second arc-shaped spring piece have arc-shaped grooves on their opposite sides.

[0010] In the preferred embodiment, the first connecting ring is provided with a connecting shaft, which is fixedly sleeved in the bearing provided in the first connecting ring.

[0011] In the preferred embodiment, a connecting bolt is provided in the middle of the second connecting ring, and the connecting bolt is detachably connected to the bearing provided in the second connecting ring.

[0012] In the preferred embodiment, one end of the first arc-shaped spring and the second arc-shaped spring are fixedly provided with a tapered connector.

[0013] In the preferred embodiment, a fixing seat is fixedly provided at one end of the connecting shaft. The fixing seat is located on the inner ring of the locking ring and is used to fix the other end of the first arc-shaped spring and the second arc-shaped spring.

[0014] In the preferred embodiment, rectangular grooves are provided on both sides of the connector, and the rectangular grooves are connected to the gaps between the first and second arc-shaped spring pieces.

[0015] In the preferred embodiment, both the first link and the second link are provided with multiple connecting holes, and a second spring is provided between the two sides where the first link and the second link intersect, with the hooks at both ends of the second spring connected to the connecting holes. The beneficial effects of this utility model of a circumferential adaptive shorting ring for circuit breaker testing are as follows: 1. Each set of first and second connecting rods uses a detachable connection structure (such as bolt connection, quick pin, or snap-fit ​​connector), allowing for flexible adjustment of the number of connecting rod combinations based on the actual outer diameter and circumferential clearance of the circuit breaker under test. By increasing or decreasing the number of connecting rod segments, the circumference of the locking ring can be modularly adjusted to accommodate different specifications and models of sprite contacts, ensuring precise alignment of each clearance and improving the versatility and installation adaptability of the device. 2. A first spring is positioned between the first and second arc-shaped spring pieces. Its elastic preload pushes the two arc-shaped spring pieces apart in opposite directions, ensuring that their end electrical contact surfaces firmly abut against the radial gap between adjacent contacts of the plum blossom contact. This design not only ensures good electrical contact performance but also maintains stable contact under vibration or current surges, effectively reducing contact resistance and preventing localized overheating. It also possesses a certain degree of self-adaptive compensation capability, accommodating minor contact deformations or installation deviations. 3. The second spring is installed on both sides of the cross hinge of the first and second connecting rods. Symmetrically arranged tension or compression springs provide a continuous radial tightening force, ensuring the locking ring, composed of multiple connecting rod segments, is more securely fastened to the outer circumference of the sprite-shaped contact. This structure enhances the mechanical stability of the overall connection, prevents the device from loosening or falling off during handling or testing, and improves operational safety and connection reliability. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a structural diagram of the locking ring formed by the first and second connecting rods of this utility model; Figure 2 This is a connection structure diagram of the two sets of first and second connecting rods of this utility model; Figure 3 This is a structural diagram of a set of first and second connecting rods of this utility model; Figure 4 This is a utility model Figure 3 The structural diagram of A in the middle.

[0017] In the diagram: 1. First connecting rod; 2. Second connecting rod; 120. Connecting hole; 3. First connecting ring; 4. Second connecting ring; 5. Bearing; 6. Connecting shaft; 7. Connecting bolt; 8. Fixing seat; 9. First arc-shaped spring; 10. Second arc-shaped spring; 910. Slot; 11. Plug; 1101. Rectangular slot; 12. First spring; 13. Second spring. Detailed Implementation

[0018] Example 1 like Figure 1-4 As shown, a circumferential adaptive shorting ring for circuit breaker testing includes: The first link 1 is movably connected to the provided second link 2. Each first link 1 and second link 2 is set as a group. The two ends of the first link 1 and second link 2 distributed in the circumferential direction in each group are movably connected to form a locking ring. The arc-shaped springs are correspondingly spaced at the intersection of the first link 1 and the second link 2. A first spring 12 is provided between the two arc-shaped springs. The two arc-shaped springs are used to insert into the gap between the plum blossom contacts so that the first spring 12 holds the two arc-shaped springs against the plum blossom contacts.

[0019] Furthermore, the first connecting rod 1 and the second connecting rod 2 are hollow in the middle along their length to reduce overall weight and save materials. The first connecting rod 1 and the second connecting rod 2 are arranged to rotate at the middle, with the middle as the rotation point. Each first connecting rod 1 and the second connecting rod 2 form a group, and each group of first connecting rods 1 and the second connecting rod 2 are circumferentially distributed. Each group of connecting rods is movably connected to each other and forms a locking ring. In use, the locking ring formed by each group of connecting rods is opened and fitted onto the plum blossom contact. Several groups of arc-shaped springs are provided, and each group of arc-shaped springs is respectively located at the intersection of the first connecting rod 1 and the second connecting rod 2. Each group of arc-shaped springs has two correspondingly spaced springs, which facilitates compression space when inserted into the gap of the plum blossom contact. Moreover, a first spring 12 is fixed between every two arc-shaped springs to prevent the arc-shaped springs from falling out when inserted into the plum blossom contact.

[0020] The first connecting rod 1 and the second connecting rod 2 are both provided with a first connecting ring 3 in the middle, and the first connecting rings 3 provided on the first connecting rod 1 and the second connecting rod 2 are arranged to overlap each other.

[0021] Furthermore, each of the first connecting rods 1 and the second connecting rod 2 is fixed with a first connecting ring 3 at the middle of the width bend. The first connecting ring 3 is opened with a through hole in the middle. The first connecting rings 3 in the first connecting rods 1 and the second connecting rod 2 overlap each other to facilitate connection and facilitate the unfolding and retraction of the first connecting rods 1 and the second connecting rod 2.

[0022] The first connecting rod 1 and the second connecting rod 2 are respectively fixed with second connecting rings 4. When the first connecting rod 1 and the second connecting rod 2 are connected, the second connecting rings 4 are overlapped and detachably connected. The first connecting ring 3 and the second connecting ring 4 are both fitted with bearings 5.

[0023] Furthermore, the two ends of the first connecting rod 1 and the second connecting rod 2 are respectively fixedly connected to the second connecting ring 4. The second connecting ring 4 is provided with a through hole in the middle to facilitate the connection of each set of the first connecting rod 1 and the second connecting rod 2. The first connecting ring 3 and the second connecting ring 4 are respectively fixedly fitted with bearings 5 ​​in the middle to facilitate the rotation of the connection point between each set of the first connecting rod 1 and the second connecting rod 2.

[0024] The arc-shaped spring includes a first arc-shaped spring piece 9 and a second arc-shaped spring piece 10 with corresponding concave surfaces. The opposite sides of the first arc-shaped spring piece 9 and the second arc-shaped spring piece 10 are both provided with arc-shaped slots 910.

[0025] Furthermore, the corresponding surfaces of the first arc-shaped spring 9 and the second arc-shaped spring 10 are concave, and the first arc-shaped spring 9 and the second arc-shaped spring 10 are made of a metal with good elasticity, which facilitates the insertion of the first arc-shaped spring 9 and the second arc-shaped spring 10 into the gap between the pendulum contacts. The opposite sides of the first arc-shaped spring 9 and the second arc-shaped spring 10 are both machined with arc-shaped grooves 910. The grooves 910 are used to engage with the gap between the pendulum contacts, preventing them from not engaging properly under special circumstances. The arc-shaped grooves 910 also prevent the first arc-shaped spring 9 and the second arc-shaped spring 10 from disengaging from the gap between the pendulum contacts.

[0026] The first connecting ring 3 is provided with a connecting shaft 6, which is fixedly sleeved in the bearing 5 provided in the first connecting ring 3.

[0027] Furthermore, each of the first connecting rings 3 is fitted with a bearing 5, and every two first connecting rings 3 are overlapped. Every two first connecting rings 3 are connected to the connecting shaft 6 through the bearing 5, while the first connecting rod 1 and the second connecting rod 2 rotate around the connecting shaft 6 through the bearing 5, and the connecting shaft 6 remains stationary.

[0028] The second connecting ring 4 has a connecting bolt 7 in the middle, and the connecting bolt 7 can be detachably connected to the bearing 5 provided in the second connecting ring 4.

[0029] Furthermore, the connecting bolts 7 facilitate the detachable connection between each set of first connecting rod 1 and second connecting rod 2. If the gap between the sprite contacts increases or decreases, then a set of first connecting rod 1 and second connecting rod 2 can be added or removed to accommodate the size of the sprite contacts.

[0030] The first arc-shaped spring 9 and the second arc-shaped spring 10 are fixedly provided with a tapered plug 11 at one end.

[0031] Furthermore, each of the first arc-shaped spring 9 and the second arc-shaped spring 10 forms a group, and one end of each group of the first arc-shaped spring 9 and the second arc-shaped spring 10 is fixed with a connector 11. The connector 11 is tapered to facilitate insertion into the gap between the plum blossom contacts.

[0032] A fixing seat 8 is fixedly provided at one end of the connecting shaft 6. The fixing seat 8 is located in the inner ring of the locking ring. The fixing seat 8 is used to fix the other end of the first arc-shaped spring 9 and the second arc-shaped spring 10.

[0033] Furthermore, since the connecting shaft 6 does not rotate with the first connecting rod 1 and the second connecting rod 2, the connecting shaft 6 is used to fix the fixing seat 8. The fixing seat 8 is circumferentially distributed on the inner ring of the locking ring, and each connecting shaft 6 is located at the intersection of each group of the first connecting rod 1 and the second connecting rod 2. The fixing seat 8 is used to fix the other end of each group of the first arc-shaped spring 9 and the second arc-shaped spring 10.

[0034] The connector 11 has rectangular slots 1101 on both sides, and the rectangular slots 1101 are connected to the gaps between the first arc-shaped spring 9 and the second arc-shaped spring 10.

[0035] Furthermore, the connector 11 is made of a metal material with good elasticity, and the machined rectangular groove 1101 provides space for the connector 11 to be squeezed when inserted between the gaps of the stud contacts. Each corner in the rectangular groove 1101 is rounded to prevent the connector 11 from cracking when squeezed.

[0036] The first link 1 and the second link 2 are each provided with a plurality of connecting holes 120. A second spring 13 is provided between the two sides of the first link 1 and the second link 2 which are intersected, and the hooks at both ends of the second spring 13 are connected to the connecting holes 120.

[0037] Furthermore, multiple connecting holes 120 are machined on the first connecting rod 1 and the second connecting rod 2, and hooks at both ends of the second spring 13 are connected to the connecting holes 120. The arrangement of the second spring 13 helps to more firmly lock the locking ring formed by the first connecting rod 1 and the second connecting rod 2 onto the plum blossom contact.

[0038] Example 2 The first connecting rod 1 and the second connecting rod 2 are arranged in a cross configuration as a group. Each group of first connecting rods 1 and second connecting rod 2 has multiple circumferentially arranged connecting rods 1 and 2, forming a locking ring. This allows for easy adjustment of the locking ring diameter according to the size of the sprite contact. A second spring 13 is provided between the two sides where the first connecting rods 1 and second connecting rod 2 are arranged in a cross configuration. The second spring 13 can not only securely lock the outer circumference of the sprite contact, but also reset the spacing between each group of first connecting rods 1 and second connecting rod 2 when the locking ring is not in use, eliminating the need for manual reset.

[0039] The first arc-shaped spring 9 and the second arc-shaped spring 10 form a group and are located at the intersection of the first connecting rod 1 and the second connecting rod 2. There is a gap between each group of the first arc-shaped spring 9 and the second arc-shaped spring 10, and each group has a connector 11 fixed to one end. The connector 11 is tapered to facilitate the insertion of each group of the first arc-shaped spring 9 and the second arc-shaped spring 10 into the space between the spline contacts. A slot 910 is provided on the opposite side of the first arc-shaped spring 9 and the second arc-shaped spring 10 to prevent displacement after insertion. When it is necessary to remove the locking ring from the spline contact, one method is to first push the first arc-shaped spring 9 and the second arc-shaped spring 10 out of the gap between the spline contacts and then remove the locking ring, which will increase the diameter of the locking ring formed by the first connecting rod 1 and the second connecting rod 2. Another method is to unscrew the connecting bolt 7 between the two groups to remove the locking ring from the spline contact.

[0040] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A circumferential adaptive short-circuit ring for circuit breaker testing, characterized in that it comprises: The first link (1) is movably connected to the provided second link (2). Each first link (1) and second link (2) is set as a group. The two ends of the first link (1) and second link (2) distributed in the circumferential direction in each group are movably connected to form a locking ring. Arc-shaped springs are correspondingly spaced at the intersection of the first link (1) and the second link (2). A first spring (12) is provided between the two arc-shaped springs. The two arc-shaped springs are used to insert into the gap between the plum blossom contacts so that the first spring (12) holds the two arc-shaped springs against the plum blossom contacts.

2. The circumferential adaptive short-circuit ring for circuit breaker testing according to claim 1, characterized in that, The first connecting ring (3) is provided in the middle of the first connecting rod (1) and the second connecting rod (2), and the first connecting rings (3) provided on the first connecting rod (1) and the second connecting rod (2) are arranged to overlap each other.

3. A circumferential adaptive shorting ring for circuit breaker testing according to claim 1 or 2, characterized in that, The first connecting rod (1) and the second connecting rod (2) are respectively fixed with second connecting rings (4). When the first connecting rod (1) and the second connecting rod (2) are connected, the second connecting rings (4) are overlapped and detachably connected. The first connecting ring (3) and the second connecting ring (4) are both fitted with bearings (5).

4. A circumferential adaptive short-circuit ring for circuit breaker testing according to claim 1, characterized in that, The arc-shaped spring includes a first arc-shaped spring piece (9) and a second arc-shaped spring piece (10) with corresponding concave surfaces. The opposite sides of the first arc-shaped spring piece (9) and the second arc-shaped spring piece (10) are provided with arc-shaped slots (910).

5. A circumferential adaptive short-circuit ring for circuit breaker testing according to claim 2, characterized in that, The first connecting ring (3) is provided with a connecting shaft (6), which is fixedly sleeved in the bearing (5) provided in the first connecting ring (3).

6. A circumferential adaptive short-circuit ring for circuit breaker testing according to claim 3, characterized in that, The second connecting ring (4) has a connecting bolt (7) in the middle, and the connecting bolt (7) can be detachably connected to the bearing (5) provided in the second connecting ring (4).

7. A circumferential adaptive short-circuit ring for circuit breaker testing according to claim 4, characterized in that, The first arc-shaped spring (9) and the second arc-shaped spring (10) are fixed with a tapered connector (11) at one end.

8. A circumferential adaptive short-circuit ring for circuit breaker testing according to claim 5, characterized in that, A fixing seat (8) is fixedly provided at one end of the connecting shaft (6). The fixing seat (8) is located in the inner ring of the locking ring. The fixing seat (8) is used to fix the other end of the first arc-shaped spring (9) and the second arc-shaped spring (10).

9. A circumferential adaptive shorting ring for circuit breaker testing according to claim 7, characterized in that, The connector (11) has rectangular slots (1101) on both sides, and the rectangular slots (1101) are connected to the gap between the first arc-shaped spring (9) and the second arc-shaped spring (10).

10. A circumferential adaptive short-circuit ring for circuit breaker testing according to claim 1, characterized in that, Multiple connecting holes (120) are provided on the first link (1) and the second link (2). A second spring (13) is provided between the two sides of the first link (1) and the second link (2) which are intersected, and the hooks at both ends of the second spring (13) are connected to the connecting holes (120).

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