Lightning arrester with rotatable connector lug and function of isolating switch

Abstract

The invention discloses a lightning arrester with a rotatable connector lug and capable of playing a role of an isolating switch. The connector comprises a terminal, a connector lug and a sleeve. The terminal is provided with an external thread; the connector lug comprises a wiring board and a clamping groove seat; a clamping groove is formed in the side surface of the clamping groove seat; the sleeving cylinder is made of an insulating material, the middle partition plate divides the sleeving cylinder into an upper sleeve and a lower sleeve, and a metal lining with a buckle flange and a boss is fixed in the upper sleeve. The connector lug is arranged on the upper sleeve, and the buckle flange is matched with the clamping groove, so that the connector lug can freely rotate and axially slide relative to the sleeve. The terminal is installed on the lower sleeve through threads, the terminal is tightened and abuts against the boss to be electrically connected with the connector lug during working, and when disconnection is needed, the sleeving cylinder is rotated to enable the terminal to be separated from the boss to complete isolation. The sleeving cylinder can be made of engineering plastics, and the metal lining can be made of copper or aluminum. The lightning arrester solves the problem that connector lugs are inconsistent in orientation, has the function of an isolating switch, and improves the installation efficiency, the working safety and the equipment universality.

Description

Technical Field

[0001] The invention relates to the field of lightning arresters, in particular to a lightning arrester with a rotatable wiring head. Background Art

[0002] Lightning arresters are also called overvoltage protectors or overvoltage limiters. Lightning arresters are generally connected between the power grid cable and the earth, usually in parallel with the protected equipment. Lightning arresters can effectively protect equipment. Once abnormal voltage occurs, the lightning arrester will take action and play a protective role. When the equipment is running under normal operating voltage, the lightning arrester will not take effect and it will be regarded as a circuit breaker to the ground. Once high voltage appears and endangers the insulation of the protected equipment, the lightning arrester will immediately act to direct the high voltage impact current to the earth, thereby limiting the voltage amplitude and protecting the equipment. When the overvoltage disappears, the lightning arrester quickly returns to its original state, allowing the equipment and lines to work normally.

[0003] After the arrester is installed, the terminal head is generally fixed and cannot be rotated, which will lead to the situation that the orientations of multiple terminal blocks are inconsistent, resulting in different lengths and orientations of the required transition cables. For this reason, we provide a lightning arrester with a rotatable terminal head in CN205428615U.

[0004] In addition, when the arrester is tested on site, it is necessary to disconnect the arrester. Therefore, we provide a kind of arrester with an isolating switch in CN114360827B.

[0005] The present invention hopes to provide a lightning arrester with a rotatable terminal head and capable of functioning as an isolating switch. Summary of the invention

[0006] To achieve the above-mentioned purpose, the present invention provides a lightning arrester with a rotatable terminal head and capable of serving as an isolating switch, comprising: a socket sleeve made of insulating material, the middle partition of the socket sleeve dividing it into an upper sleeve and a lower sleeve, a metal liner fixed in the upper sleeve, the metal liner comprising a snap-on flange and a boss extending through a hole in the middle partition plate to the lower sleeve; a terminal head, comprising a terminal board and a slot seat, a slot being provided on the side of the slot seat, the slot width being greater than the snap-on flange of the metal liner, the terminal head being installed in the upper sleeve, and being able to freely rotate relative to the socket sleeve through the cooperation of the snap-on flange and the slot, and being able to slide up and down in the slot in the axial direction; a terminal, an external thread being provided on the terminal, being installed by cooperating with the internal thread in the lower sleeve, and being able to form an electrical connection by being screwed against the boss of the metal liner through the thread in the working state, and being disengaged from the boss when the socket sleeve is rotated to move upward as a whole to complete the isolation.

[0007] In a preferred embodiment of the present invention, the sleeve is made of engineering plastics.

[0008] In another preferred embodiment of the present invention, the metal lining is made of copper or aluminum.

[0009] Technical Effects

[0010] Effects of the terminal head rotation function

[0011] The wiring head of the present invention is rotatable, which effectively solves the problem of inconsistent orientation of multiple wiring terminals due to the non-rotatable wiring head after the arrester is installed and fixed. It avoids the situation that the required transition cables are of different lengths and in different directions, making the installation process more flexible and convenient, improving the installation efficiency, reducing the safety hazards caused by unreasonable wiring layout, and reducing the demand for transition cables of different lengths and directions, saving material costs.

[0012] Effects of the disconnect switch function

[0013] The arrester has the function of an isolating switch. When conducting field tests or other situations where the arrester needs to be disconnected, the arrester can be isolated by simply rotating the sleeve to disengage the terminal and the boss of the metal liner. This operation method is simple and fast, and does not require additional complex operating equipment or tools, which greatly improves work efficiency and reduces the difficulty and risk of operation for operators. Moreover, when the isolating switch is disconnected, it can effectively ensure the safety of testing or maintenance work and prevent accidental power-on from causing damage to personnel and equipment.

[0014] Effects of overall structural design

[0015] The sleeve is made of insulating material, which effectively insulates the connection head and the terminal, enhances the electrical safety of the arrester, reduces the risk of leakage, and improves the overall insulation performance of the equipment. The setting of the metal lining not only ensures the reliability of the electrical connection, but also provides a stable structural support for the rotation and sliding of the connection head. The design that the connection head can rotate and slide freely within a certain range enables the connection head to better adapt to different installation environments and wiring requirements during installation and adjustment, improves the versatility and compatibility of the arrester, and enables it to work stably and reliably in a variety of complex electrical systems.

[0016] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of a preferred embodiment of the present invention in a working state;

[0018] Figure 2 yes Figure 1 A top view of

[0019] Figure 3 yes Figure 1 A cross-sectional view of the sleeve of an embodiment when it moves upward. DETAILED DESCRIPTION

[0020] The following describes several preferred embodiments of the present invention with reference to the drawings in the specification, so that the technical content is clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0021] In the drawings, components with the same structure are indicated by the same numerical reference numerals, and components with similar structures or functions are indicated by similar numerical reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of the components is appropriately exaggerated in some places in the drawings.

[0022] like Figure 1-3 As shown, according to the present invention, a lightning arrester with a rotatable terminal and capable of functioning as an isolating switch is provided with a sleeve 3 made of insulating material between the terminal 1 and the terminal 2 of the lightning arrester. The middle partition 3 of the sleeve 3 divides the sleeve 3 into an upper sleeve 31 and a lower sleeve 32. A metal liner 33 is fixedly provided in the upper sleeve 31. The metal liner 33 includes a snap-on flange 331 and a boss 332 extending into the lower sleeve 32 through a hole on the middle partition 3. The terminal 2 includes a terminal board 22 and a slot seat 21. A slot 23 is provided on the side of the slot seat 21. The width of the slot 23 is greater than the snap-on flange 331. The terminal 2 is installed in the upper sleeve 31, and the snap-on flange 331 is fitted in the slot 23, so that the terminal 2 can freely rotate relative to the sleeve 3 and can also slide up and down in the slot 23 in the axial direction.

[0023] An internal thread 321 is provided in the lower sleeve 32, and an external thread 11 is provided on the terminal 1. The terminal 1 is installed in the lower sleeve 32 by means of threads.

[0024] In the working state, the terminal 1 is screwed against the boss 332 of the metal liner 33 to form an electrical connection with the terminal head 2. When disconnection is required, the sleeve 3 is rotated so that the sleeve 3 moves upward as a whole, so that the terminal 1 and the boss 332 are separated, and the isolation of the lightning arrester is completed.

[0025] The sleeve can be made of engineering plastics, and the metal lining can be made of copper or aluminum.

[0026] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in the field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A lightning arrester with a rotatable terminal head and capable of acting as an isolating switch, characterized in that include: A sleeve made of insulating material, wherein the sleeve is divided into an upper sleeve and a lower sleeve by a middle partition plate, wherein a metal liner is fixed in the upper sleeve, and the metal liner comprises a snap-on flange and a boss extending through a hole in the middle partition plate to the lower sleeve; The terminal head comprises a terminal board and a slot seat, a slot is arranged on the side of the slot seat, the width of the slot is larger than the buckle flange of the metal liner, the terminal head is installed in the upper sleeve, and can realize free rotation relative to the sleeve through the cooperation of the buckle flange and the slot, and can slide up and down in the slot in the axial direction; The terminal is provided with an external thread, which is installed by cooperating with the internal thread in the lower sleeve, and can be tightened against the boss of the metal lining by the thread in the working state to form an electrical connection. When the sleeve is rotated to move upward as a whole, it is disengaged from the boss to complete the isolation.

2. The lightning arrester with a rotatable terminal head and a function as an isolating switch as claimed in claim 1, characterized in that The sleeve is made of engineering plastics.

3. The lightning arrester with a rotatable terminal head and a function as an isolating switch as claimed in claim 1, characterized in that The metal lining is made of copper or aluminum.

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