Contact heating resistance-reducing connecting device

Abstract

The utility model discloses a contact heat-generating resistance-reducing connecting device, which relates to the technical field of contact connection and comprises connecting contacts and wiring ports, nano filling metal is padded between the connecting contacts, titanium alloy bolts are connected onto the connecting contacts, titanium alloy nuts are connected onto the titanium alloy bolts, memory alloy gaskets are arranged on the upper portions and the lower portions of the connecting contacts, and the memory alloy gaskets are connected onto the titanium alloy nuts. Limiting mechanisms are arranged on the edges of the two sides of the connecting contact, each limiting mechanism comprises a limiting clamping sleeve arranged on the connecting contact in a sleeving mode, a bolt positioning base is fixedly installed at one end of each limiting clamping sleeve, a fixing bolt is installed on each bolt positioning base, the tail end of each fixing bolt is rotationally connected with a limiting pressing plate, and insulating pads are arranged in the limiting clamping sleeves and on the limiting pressing plates. The contact heating resistance-reducing connecting device is provided. When the contacts are cooled, the gaps between the contacts are filled with the nano filling metal, the contact area between the contacts is increased, the contact resistance between the contacts is reduced, the lower the resistance between the contacts is, the lower the temperature is, and the purpose of self-healing cooling is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of contact connection, in particular to a contact heating and resistance reducing connection device. Background Technique

[0002] At present, the operating environments of power equipment vary greatly. Under the condition of non-overload load of power equipment, there are many problems of contact heating of equipment due to operating environment problems. In severe cases, it even causes equipment scrapping and personal injuries, seriously threatening the safe operation of the power grid. In a substation, wires are generally connected to circuit breakers and disconnectors through contacts, and the contacts have the situation of heating.

[0003] The reason for the heating of the equipment contacts is that during operation, two terminal boards are connected by ordinary bolts, there will be small gaps between the boards, which will increase the resistance between the two boards due to poor contact. And due to long-term vibration, the bolts will loosen, further increasing the gap between the two boards, making its resistance even greater. If it often rains in the location, rainwater is very easy to penetrate between the two boards, oxidizing the gap between the two boards, further increasing the resistance. In this way, the vicious cycle repeats, the resistance between the two boards becomes larger and larger, and the heat generation also becomes larger and larger. For this reason, a contact heating and resistance reducing connection device is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a contact heating and resistance reducing connection device to solve the problem of contact heating in the prior art.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a contact heating and resistance reducing connection device, including a connecting contact and a wiring port. A nano-filled metal is padded between the connecting contacts. A titanium alloy bolt is connected to the connecting contact, and a titanium alloy nut is connected to the titanium alloy bolt. Memory alloy gaskets are arranged on the upper and lower parts of the connecting contact. A limiting mechanism is arranged at the edges on both sides of the connecting contact. The limiting mechanism includes a limiting collar sleeved on the connecting contact. A bolt positioning seat is fixedly installed at one end of the limiting collar. A fixing bolt is installed on the bolt positioning seat. The end of the fixing bolt is rotatably connected to a limiting pressing plate. Insulating pads are arranged inside the limiting collar and on the limiting pressing plate.

[0006] Preferably, a rotating connection seat is arranged on the limiting pressing plate, and the fixing bolt is rotatably installed on the limiting pressing plate through the rotating connection seat.

[0007] Preferably, a threaded hole is opened on the bolt positioning seat, and the fixing bolt is installed on the bolt positioning seat through the threaded hole.

[0008] Preferably, an access hole is provided at one end of the limit retaining sleeve, the fixing bolt extends into the limit retaining sleeve through the access hole, the limit pressing plate is movably installed inside the limit retaining sleeve through the fixing bolt, and the limit retaining sleeve is restricted on the connection contact through the limit pressing plate.

[0009] Preferably, a through hole is provided on the connection contact, the titanium alloy bolt is connected to the connection contact through the through hole, and the connection contacts are fixed together through the titanium alloy bolt and the titanium alloy nut.

[0010] Preferably, a hole is provided in the middle of the shape memory alloy gasket, the titanium alloy bolt is connected to the shape memory alloy gasket through the hole, and the middle part of the shape memory alloy gasket bulges upward.

[0011] Preferably, the shape memory alloy gasket is pressed against the surface of the connection contact through the titanium alloy bolt.

[0012] Compared with the prior art, the beneficial effects of the present utility model are:

[0013] This application can tightly lock the connection contacts together, increase the fastening force, reduce the contact electricity, lower the temperature of the wiring terminal, and when the temperature of the connection contact rises, the nano-filled metal will liquefy. The liquefied nano-filled metal will automatically fill the gaps between the metal plates. Eventually, when the temperature drops, it will adhere between the metal plates to form a conductive layer, increasing the conductive area, and can automatically isolate the air and rainwater from penetrating between the metal plates to cause interface oxidation, avoiding the formation of an oxide layer to increase the resistance.

[0014] After the two groups of connection contacts in this application are fixed together, the fixing bolt can be tightened. After tightening the fixing bolt, it will drive the limit pressing plate to move forward, making it abut against one side of the connection contact, clamping the limit retaining sleeve on the outside of the connection contact, preventing the connection contact from being stressed and rotated, and preventing the conductive layer between the connection contacts from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a front view of the overall structure of the present utility model;

[0017] Figure 3 is a schematic diagram of the shape memory metal gasket of the present utility model;

[0018] Figure 4 is a schematic diagram of the limit mechanism of the present utility model;

[0019] Figure 5 is a schematic diagram of the connection contact of the present utility model installed on a circuit breaker;

[0020] Figure 6Schematic diagram of the connection contact of the present utility model installed on the disconnector.

[0021] Reference numerals in the figure: 1, wiring port; 2, connection contact; 3, titanium alloy bolt; 4, shape memory alloy gasket; 5, nano-filled metal; 6, titanium alloy nut; 7, limiting mechanism; 701, limiting collar; 702, insulating pad; 703, limiting pressure plate; 704, rotating connection seat; 705, fixing bolt; 706, bolt positioning seat. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present utility model.

[0023] As Figure 1 and Figure 2 shown, the present utility model provides a technical solution for a connection device for reducing resistance due to contact heating, including a connection contact 2 and a wiring port 1. A nano-filled metal 5 is interposed between the connection contacts 2. A titanium alloy bolt 3 is connected to the connection contact 2, and a titanium alloy nut 6 is connected to the titanium alloy bolt 3. Shape memory alloy gaskets 4 are provided on both the upper and lower parts of the connection contact 2. Limiting mechanisms 7 are provided at the edges on both sides of the connection contact 2.

[0024] As Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, a nano-filled metal 5 is interposed between the connection contacts 2. A titanium alloy bolt 3 is connected to the connection contact 2, and a titanium alloy nut 6 is connected to the titanium alloy bolt 3. Shape memory alloy gaskets 4 are provided on both the upper and lower parts of the connection contact 2. Through holes are provided on the connection contact 2, and the titanium alloy bolt 3 is connected to the connection contact 2 through the through holes. The connection contacts 2 are fixed together by the titanium alloy bolt 3 and the titanium alloy nut 6. Holes are provided at the middle positions of the shape memory alloy gaskets 4, and the titanium alloy bolt 3 is connected to the shape memory alloy gaskets 4 through the holes.

[0025] Embodiment 1: The device is applied to the circuit breaker and disconnector in the substation. Through the cooperation of the titanium alloy bolt 3 and the titanium alloy nut 6, two groups of connecting contacts 2 can be fixed together, and the shape memory alloy gasket 4 is pressed tightly. Compared with an ordinary flat gasket, the shape memory alloy gasket 4 bulges in the middle and is trapezoidal when viewed from the side. During the installation process, the shape memory alloy gasket 4 will be squeezed into a flat state. During use, as the temperature rises, the shape memory alloy gasket 4 will return to its initial state again, that is, the trapezoidal state. However, at this time, due to being restricted by the nut, the shape memory alloy gasket 4 does not deform and only outputs a restoring force. This restoring force will be applied to the nut and the connecting contact 2, causing the connecting contacts 2 to be tightly locked together, increasing the fastening force, reducing the contact electricity, reducing the temperature of the terminal block, and when the temperature of the connecting contact 2 rises, the nano-filled metal 5 will liquefy. The liquefied nano-filled metal 5 will automatically fill the gap between the metal plates. Finally, when the temperature drops, it will adhere between the metal plates to form a conductive layer, increasing the conductive area, and can automatically isolate air and rainwater from infiltrating between the metal plates to cause interface oxidation, avoiding the formation of an oxide layer and increasing the resistance.

[0026] As Figure 2 and Figure 4 shown, the limiting mechanism 7 includes a limiting collar 701 sleeved on the connecting contact 2. One end of the limiting collar 701 is fixedly installed with a bolt positioning seat 706. A fixing bolt 705 is installed on the bolt positioning seat 706. The end of the fixing bolt 705 is rotatably connected to a limiting pressure plate 703. Insulating pads 702 are provided inside the limiting collar 701 and on the limiting pressure plate 703. A rotating connection seat 704 is provided on the limiting pressure plate 703. The fixing bolt 705 is rotatably installed on the limiting pressure plate 703 through the rotating connection seat 704. A threaded hole is provided on the bolt positioning seat 706, and the fixing bolt 705 is installed on the bolt positioning seat 706 through the threaded hole.

[0027] Embodiment 2: As Figure 6 shown: The limiting collar 701 can be sleeved on the connecting contact 2. After the two groups of connecting contacts 2 are fixed together, the fixing bolt 705 can be tightened. After tightening the fixing bolt 705, it will drive the limiting pressure plate 703 to move forward, making it abut against one side of the connecting contact 2, clamping the limiting collar 701 on the outside of the connecting contact 2, preventing the connecting contact 2 from being stressed and rotated, and preventing the conductive layer between the connecting contacts 2 from being damaged.

[0028] Working principle: First, install the wire on one of the connecting contacts 2, and install the other connecting contact 2 on the circuit breaker or disconnector. Then, butt the two groups of connecting contacts 2 together. After the two groups of connecting contacts 2 are butted together, gaskets can be placed, and the two groups of connecting contacts 2 are fixed together through the cooperation of titanium alloy bolts 3 and titanium alloy nuts 6. The nano-filled metal 5 is a metal that will liquefy when heated but is solid at room temperature. The solid sheet nano-filled metal 5 can be placed between the two connecting contacts 2, and the contacts are tightened in cooperation with the shape memory alloy gasket 4 and the titanium alloy bolt 3. At this time, the nano-filled metal 5 is installed. Thereafter, when this contact head gets hot during operation, the nano-filled metal 5 will liquefy when heated. At this time, the liquid nano-filled metal 5 in paste form will fill the gap between the contacts, increasing the contact area between the contacts and reducing the contact resistance between the contacts. The lower the resistance between the contacts, the lower the temperature will be, achieving the purpose of self-healing temperature reduction. Then, when the temperature drops, the nano-filled metal 5 will solidify and remain the same. At this time, the gap between the contacts is also filled, and rainwater cannot penetrate through it, and the problem of oxidation between the contacts is also solved. The limit collar 701 can be sleeved on the connecting contact 2. After the two groups of connecting contacts 2 are fixed together, the fixing bolt 705 can be tightened. After tightening the fixing bolt 705, it will drive the limit pressing plate 703 to move forward, making it abut against one side of the connecting contact 2, clamping the limit collar 701 on the outside of the connecting contact 2, preventing the connecting contact 2 from being stressed and rotating, and preventing the conductive layer between the connecting contacts 2 from being damaged.

[0029] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A contact heat resistance reduction connection device, comprising a connection contact (2) and a connection port (1), characterized in that: A nano-filled metal (5) is provided between the connecting contacts (2), a titanium alloy bolt (3) is connected to the connecting contact (2), a titanium alloy nut (6) is connected to the titanium alloy bolt (3), memory alloy gaskets (4) are provided at the upper and lower parts of the connecting contact (2), and a limiting mechanism (7) is provided at the edges of both sides of the connecting contact (2), the limiting mechanism (7) comprises a limiting sleeve (701) sleeved on the connecting contact (2), a bolt positioning seat (706) is fixedly installed at one end of the limiting sleeve (701), a fixing bolt (705) is installed on the bolt positioning seat (706), and the end of the fixing bolt (705) is rotatably connected to the limiting pressure plate (703), and an insulating pad (702) is provided inside the limiting sleeve (701) and on the limiting pressure plate (703).

2. The contact heat-resistance-reducing connection device according to claim 1, characterized in that: A rotating connection seat (704) is provided on the limiting pressure plate (703), and the fixing bolt (705) is rotatably mounted on the limiting pressure plate (703) via the rotating connection seat (704).

3. The contact heat resistance reduction connection device according to claim 2, characterized in that: A threaded hole is provided on the bolt positioning seat (706), and the fixing bolt (705) is installed on the bolt positioning seat (706) through the threaded hole.

4. The contact heat resistance reduction connection device according to claim 3, characterized in that: An inlet and outlet hole is provided at one end of the limiting sleeve (701), and the fixing bolt (705) extends into the limiting sleeve (701) through the inlet and outlet hole. The limiting pressure plate (703) is movably mounted on the inner side of the limiting sleeve (701) through the fixing bolt (705), and the limiting sleeve (701) is restricted on the connection contact (2) by the limiting pressure plate (703).

5. The contact heat generation and resistance reduction connection device according to claim 4, characterized in that: A through hole is provided on the connecting contact (2), and the titanium alloy bolt (3) is connected to the connecting contact (2) through the through hole, and the connecting contacts (2) are fixed together by the titanium alloy bolt (3) and the titanium alloy nut (6).

6. The contact heat resistance reduction connection device according to claim 1, characterized in that: A hole is provided in the middle of the memory alloy gasket (4), and the titanium alloy bolt (3) is connected to the memory alloy gasket (4) through the hole. The middle portion of the memory alloy gasket (4) is raised upward.

7. The contact heat generation and resistance reduction connection device according to claim 1, characterized in that: The memory alloy gasket (4) is pressed onto the surface of the connection contact (2) via the titanium alloy bolt (3).

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