Internal isolation mechanism of ring main unit

Abstract

The utility model provides an internal isolation mechanism of a ring main unit, and belongs to the technical field of ring main units. Comprising a moving insulation part and a static insulation part, the moving insulation part is provided with a moving contact, and the static insulation part is provided with a static contact; the balls are arranged in the moving contact in a rotating and sliding mode and located at the end, making contact with the static contact, of the moving contact, the balls protrude out of the moving contact, and the balls are used for reducing friction generated when the moving contact makes contact with the static contact; and the contact block is arranged on the static contact, and the contact block is used for the contact connection of the static contact and the moving contact. According to the utility model, through cooperation of the ball body, the spring, the arc-shaped groove, the elastic contact plate, the pressing plate and other structures, the purposes of ensuring stable contact of the isolation electric brake contact and reducing heating risk are achieved, and the effect of ensuring safe and reliable operation of an electric power system is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ring net case technical field, especially ring net case internal isolation mechanism. BACKGROUND

[0002] With the continuous development of power system, ring net case has been widely applied in distribution network. The isolation mechanism in the ring net case is an important electrical element. The isolation switch in the ring net case is the core component for realizing the safety isolation and control of the circuit. In the process of power transmission and distribution, the isolation switch plays a key role in isolating power source, facilitating maintenance and flexible switching circuit. The reliability and stability of the performance of the isolation switch play a crucial role in the safe and efficient operation of the power system.

[0003] However, during the long-term operation, the contacts of the isolation switch are prone to poor contact due to frequent switching operation and continuous friction and wear between mechanical parts. The surface of the contact is gradually worn out due to long-term friction, and the originally smooth contact surface becomes uneven, which directly leads to a significant reduction in the actual contact area between the contacts. According to the principle of electricity, the reduction of the contact area will cause the contact resistance to increase sharply. When the current passes through the contact with increased resistance, a large amount of heat will be generated, causing the local temperature of the contact to rise rapidly. This local overheating phenomenon not only accelerates the aging and damage of the contact, but also may cause the metal on the surface of the contact to soften, deform and even melt, resulting in the interruption of the circuit and the occurrence of power failure, which poses a serious threat to the stable operation of the power system. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide an internal isolation mechanism for a ring net case to solve the technical problem of poor contact and heating of the contact of the isolation switch due to frequent operation and friction wear, which threatens the stable operation of the power system.

[0005] Technical solution: To achieve the above purpose, the utility model discloses an internal isolation mechanism of ring network box through the following technical scheme: a kind of internal isolation mechanism of ring network box, comprising: dynamic insulation part and static insulation part, dynamic insulation part is equipped with dynamic contact, static insulation part is equipped with static contact;Ball is equipped with multiple, and multiple ball rotation and sliding are arranged in dynamic contact, and at the end of dynamic contact and static contact contact, the ball protrudes from dynamic contact, the ball is used to reduce the friction when dynamic contact and static contact contact;Contact block is arranged on static contact, and the contact block is used for static contact and dynamic contact contact connection;Arc slot is arranged on the contact surface of contact block and dynamic contact, and the arc slot is matched with ball;The arc slot and ball are used to increase the contact area of dynamic contact and contact block, wherein dynamic insulation part and static insulation part need to select material with excellent insulation performance, high mechanical strength and high temperature resistance, such as ceramic, high-performance engineering plastics etc.The ball material should have high hardness and good conductivity, such as copper alloy.The contact block material is consistent with static contact, and the surface is silver-plated to enhance conductivity and corrosion resistance.The curvature of arc slot must be closely matched with the curvature of ball to ensure accurate cooperation.

[0006] In further embodiment, sliding block is equipped with multiple, and multiple sliding block sliding is arranged in dynamic contact, and multiple sliding blocks correspond to multiple balls, the sliding block and the ball rotate contact, the sliding block is used to push ball to the direction of contact block sliding, wherein the sliding block is designed as cuboid, and its size is accurately matched with the internal sliding groove of dynamic contact.The sliding surface of sliding block is finely processed to reduce sliding resistance.

[0007] In further embodiment, spring is equipped with multiple, and multiple spring is arranged in dynamic contact, multiple spring corresponds to multiple sliding block, the spring is at the end of sliding block away from ball, the spring is used to push sliding block to move, wherein spring selects compression spring, and its elastic coefficient is accurately calculated and selected according to the contact pressure requirement of dynamic and static contact.Spring material uses high-strength spring steel, and is subjected to rustproof treatment, such as galvanizing, nickel plating etc.Spring needs to keep a certain pre-compression amount after installation to ensure that effective elastic force can be provided in initial state.

[0008] In a further embodiment, at least one elastic contact plate is provided, and the elastic contact plate is L-shaped, one end of the elastic contact plate is connected with the contact block, the elastic contact plate and the contact plate form a U-shaped groove for accommodating the movable contact, at least one pressing plate is provided, one end of the pressing plate is connected with the movable contact, the pressing plate is inverted L-shaped, the movable contact and the pressing plate form an inverted U-shaped groove for accommodating the elastic contact plate, wherein the elastic contact plate and the pressing plate are made of metal materials with good elasticity and conductivity, such as phosphor bronze, the thickness is reasonably designed according to the actual carrying current and the required elastic force, the surface of the elastic contact plate and the pressing plate is subjected to oxidation resistance treatment, such as passivation treatment, to prolong the service life, the size of the U-shaped groove and the inverted U-shaped groove is matched with each other to ensure the close cooperation of the movable contact and the elastic contact plate.

[0009] In a further embodiment, the opening of the inverted U-shaped groove formed by the movable contact and the pressing plate is in the shape of "8", wherein the opening angle of the "8" shape is optimized according to the size of the movable contact and the elastic contact plate, and the opening edge is chamfered to prevent scratching the elastic contact plate during closing.

[0010] In a further embodiment, the protruding part of the ball is less than one half of the whole ball, wherein the protruding part of the ball and the whole ball maintain a proper ratio of radius to ensure that the ball can work stably under different working conditions and play its function of reducing friction and adjusting contact.

[0011] In a further embodiment, the opening depth of the arc-shaped groove is less than the protruding part of the ball in the movable contact, wherein the opening depth of the arc-shaped groove and the protruding part of the ball in the movable contact maintain a reasonable difference, which can be adjusted according to different application scenarios and contact working requirements to achieve the best contact effect.

[0012] Beneficial effects: 1. The movable insulation part and the static insulation part ensure electrical isolation, the multiple balls and the arc-shaped groove cooperate to reduce friction and increase contact area, the sliding block and the spring cooperate to push the ball to maintain contact pressure, the nested structure composed of the elastic contact plate and the pressing plate increases the contact area and buffers, and the inverted U-shaped groove with "8" shaped opening guides the closing, which realizes the purpose of ensuring stable contact of the isolation switch contact and reducing the risk of heating, and achieves the effect of ensuring safe and reliable operation of the power system. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0014] Figure 1The utility model discloses a structure schematic drawing.

[0015] Figure 2 It is structure schematic drawing for static insulation part.

[0016] Figure 3 It is structure schematic drawing for contact block.

[0017] Figure 4 It is Figure 2 Structure schematic drawing of A at.

[0018] The reference signs in the drawing are: 1, moving insulation part;101, moving contact;1011, pressing plate;2, static insulation part;201, static contact;2011, contact block;2012, arc slot;2013, elastic contact plate;3, sphere;4, sliding block;5, spring. Specific implementation

[0019] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the technical scheme in the utility model embodiment is described clearly and completely, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of the utility model protection.

[0020] The application embodiment provides an internal isolation mechanism of ring network box, and solves the technical problem that the isolation switch contact is poor in contact, generates heat due to frequent operation and friction loss, and further threatens the stable operation of the power system. In actual use, the stable contact of the isolation switch contact is ensured, the heating risk is reduced, and the safe and reliable operation of the power system is ensured.

[0021] In order to better understand the above technical scheme, the above technical scheme will be described in detail in combination with the drawings of the specification and specific implementation.

[0022] Refer to Figures 1-4The utility model relates to a kind of ring network cabinet internal isolation mechanism, comprising: dynamic insulation part 1 and static insulation part 2, dynamic contact 101 is equipped on the dynamic insulation part 1, static contact 201 is equipped on the static insulation part 2;Ball 3 is equipped with multiple, and multiple ball 3 rotation and sliding are arranged in dynamic contact 101, and at the end of dynamic contact 101 and static contact 201 contact, the ball 3 protrudes in dynamic contact 101, the ball 3 is used to reduce the friction when dynamic contact 101 and static contact 201 contact;Contact block 2011 is arranged on static contact 201, and the contact block 2011 is used for static contact 201 and dynamic contact 101 contact connection;Arc slot 2012 is arranged on the contact surface of contact block 2011 and dynamic contact 101, and the arc slot 2012 is adapted with ball 3;The arc slot 2012 and ball 3 are used to increase the contact area of dynamic contact 101 and contact block 2011.

[0023] It provides electrical isolation for dynamic and static contacts 201, reduces friction when dynamic and static contacts 201 contact, ensures stable contact connection between the two, increases the contact area of dynamic contact 101 and contact block 2011, and further reduces contact resistance and heat generation.

[0024] Sliding block 4 is provided with multiple, and multiple sliding block 4 sliding is arranged in dynamic contact 101, and multiple sliding block 4 corresponds to multiple ball 3, the sliding block 4 is in contact with the ball 3 rotation, and the sliding block 4 is used to push ball 3 to the direction of contact block 2011 sliding.

[0025] It realizes that ball 3 is pushed to the direction of contact block 2011 sliding by sliding block 4, dynamically adjusts the position of ball 3, and ensures that dynamic and static contacts 201 can maintain good contact under various working conditions.

[0026] Spring 5 is provided with multiple, and multiple spring 5 is arranged in dynamic contact 101, multiple spring 5 corresponds to multiple sliding block 4, the spring 5 is at the end of sliding block 4 away from ball 3, and the spring 5 is used to push sliding block 4 to move.

[0027] It realizes that sliding block 4 is pushed to move by the elastic force of spring 5, and then indirectly pushes ball 3, continuously maintains the pressure on contact block 2011, compensates the contact gap change caused by contact wear, environmental change and other factors, and maintains stable contact pressure.

[0028] The elastic contact plate 2013 is provided at least one, and the elastic contact plate 2013 is L-shaped, one end of the elastic contact plate 2013 is connected with the contact block 2011, and the elastic contact plate 2013 and the contact plate form a U-shaped groove for accommodating the movable contact 101; the pressing plate 1011 is provided at least one, one end of the pressing plate 1011 is connected with the movable contact 101, the pressing plate 1011 is inverted L-shaped, and the movable contact 101 and the pressing plate 1011 form an inverted U-shaped groove for accommodating the elastic contact plate 2013.

[0029] The nested structure formed by the elastic contact plate 2013 and the pressing plate 1011 is realized, the contact area between the movable contact 201 and the static contact 201 is increased, the buffering effect is achieved during contact, the rigid collision damage to the contact is avoided, and the effect of guaranteeing the contact reliability is achieved.

[0030] The opening of the inverted U-shaped groove formed by the movable contact 101 and the pressing plate 1011 is in the shape of an "eight".

[0031] The effect of guiding the elastic contact plate 2013 to smoothly enter the inverted U-shaped groove by the "eight"-shaped opening during the closing process of the movable contact 201 and the static contact 201 is realized, the closing accuracy and reliability are improved, and the risk of closing out of position is reduced.

[0032] The convex part of the ball 3 is less than one half of the whole ball 3.

[0033] The effect of ensuring that the ball 3 has enough support and rotation space in the movable contact 101, and forming appropriate contact area and contact pressure when cooperating with the arc-shaped groove 2012 is realized.

[0034] The opening depth of the arc-shaped groove 2012 is less than the convex part of the ball 3 in the movable contact 101.

[0035] The effect of keeping the ball 3 having a certain degree of freedom when cooperating with the arc-shaped groove 2012 is realized, when the movable contact 201 and the static contact 201 have a small positional deviation or angle change, the ball 3 can roll and adjust the position in the arc-shaped groove 2012 flexibly, and the effect of ensuring that the movable contact 101 and the contact block 2011 are always in good contact is achieved.

[0036] In use, firstly, the moving insulation part 1 and the static insulation part 2 ensure that the moving contact 101 and the static contact 201 are electrically isolated, when the moving contact 101 is in contact with the static contact 201, the plurality of balls 3 arranged in the moving contact 101 and protruding from the moving contact 101 are in contact with the arc-shaped grooves 2012 on the contact block 2011, which reduces the contact friction between the moving contact 101 and the static contact 201, increases the contact area between the moving contact 101 and the contact block 2011, and reduces the heat generation; then, if the contact state of the moving contact 101 and the static contact 201 changes, the sliding block 4 in contact with the ball 3 is pushed to slide the ball 3 to the contact block 2011 direction under the elastic force of the plurality of corresponding springs 5, dynamically adjusts the position of the ball 3, and maintains the stable contact pressure on the contact block 2011; during the closing process, the elastic contact plate 2013 in L shape and the contact plate form a U-shaped groove to accommodate the moving contact 101, and the pressing plate 1011 in inverted L shape and the moving contact 101 form an inverted U-shaped groove to accommodate the elastic contact plate 2013, wherein the "eight" design at the opening of the inverted U-shaped groove guides the elastic contact plate 2013 to smoothly enter, improves the closing accuracy and reliability; in addition, the protruding part of the ball 3 is less than half of the whole ball 3, which ensures that the ball 3 has sufficient support and rotation space in the moving contact 101, and the depth of the arc-shaped groove 2012 is less than the protruding part of the ball 3 in the moving contact 101, so that the ball 3 has a free degree of activity when cooperating with the arc-shaped groove 2012, so as to flexibly roll and adjust the position when the moving contact 101 and the static contact 201 have a small positional deviation or angle change, and ensure that the moving contact 101 and the static contact 201 always maintain good contact.

[0037] The figure expressed in the drawing is an example figure, and the purpose is only to more intuitively show the key structure and connection relationship of the internal isolation mechanism of the ring network box; in actual application, the appearance and size of the device can be adjusted and optimized according to specific needs.

[0038] The utility model covers any alternative, modification, equivalent method and scheme made on the essence and range of the utility model. In order to make the public have thorough understanding of the utility model, the specific details are explained in the above preferred embodiment of the utility model, and the utility model can also be completely understood without the description of these details for the person skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the utility model, the well-known methods, processes, procedures, elements and circuits are not described in detail.

[0039] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements should also be regarded as the protection range of the utility model.

Claims

1. A ring main unit internal isolation mechanism, comprising a dynamic insulation part (1) and a static insulation part (2), characterized in that: The moving insulation part (1) is provided with a moving contact (101), and the static insulation part (2) is provided with a static contact (201); A plurality of spherical bodies (3) are rotatably and slidably arranged in the moving contact (101) and located at the end of the moving contact (101) in contact with the static contact (201), the spherical bodies (3) protrude from the moving contact (101), and the spherical bodies (3) are used to reduce friction when the moving contact (101) is in contact with the static contact (201); A contact block (2011) is arranged on the static contact (201), and the contact block (2011) is used for contact connection between the static contact (201) and the moving contact (101); An arc-shaped groove (2012) is arranged on the contact surface between the contact block (2011) and the moving contact (101), and the arc-shaped groove (2012) is matched with the spherical bodies (3); The arc-shaped groove (2012) and the spherical bodies (3) are used to increase the contact area between the moving contact (101) and the contact block (2011).

2. The internal isolation mechanism of the ring main unit according to claim 1, characterized in that, Further comprising: A plurality of sliding blocks (4) are slidably arranged in the moving contact (101), and the plurality of sliding blocks (4) correspond to the plurality of spherical bodies (3), the sliding blocks (4) are in rotational contact with the spherical bodies (3), and the sliding blocks (4) are used to push the spherical bodies (3) to slide towards the contact block (2011).

3. The ring box internal isolation mechanism of claim 2, wherein, Further comprising: A plurality of springs (5) are arranged in the moving contact (101), and the plurality of springs (5) correspond to the plurality of sliding blocks (4), the springs (5) are located at the end of the sliding blocks (4) away from the spherical bodies (3), and the springs (5) are used to push the sliding blocks (4) to move.

4. The internal isolation mechanism of the ring net box according to claim 1, characterized in that, Further comprising: At least one elastic contact plate (2013) is provided, and the elastic contact plate (2013) is L-shaped, one end of the elastic contact plate (2013) is connected with the contact block (2011), the elastic contact plate (2013) and the contact plate form a U-shaped groove for accommodating the moving contact (101); At least one pressing plate (1011) is provided, one end of the pressing plate (1011) is connected with the moving contact (101), the pressing plate (1011) is inverted L-shaped, the moving contact (101) and the pressing plate (1011) form an inverted U-shaped groove for accommodating the elastic contact plate (2013).

5. The ring box internal isolation mechanism of claim 4, wherein: The opening of the inverted U-shaped groove formed by the moving contact (101) and the pressing plate (1011) is in the shape of an "eight".

6. The internal isolation mechanism of the ring net box according to claim 1, characterized in that: The protruding part of the spherical body (3) is less than one half of the whole spherical body (3).

7. The ring box internal isolation mechanism of claim 6, wherein: The opening depth of the arc-shaped groove (2012) is less than the protruding part of the spherical body (3) in the moving contact (101).

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