Static contact device and use method thereof

Abstract

The invention belongs to the technical field of static contacts, and discloses a static contact device and a use method thereof, the device comprises a conductive plate, and the center of the bottom surface of the conductive plate is connected with a static contact; two ends of the bottom surface of the current-conducting plate are respectively connected with two crank arms of which the end parts face the static contact; the outer side of the end, away from the current-conducting plate, of the crank arm is sleeved with a limiting bent plate and a clamping fork, and the end, away from the current-conducting plate, of the crank arm is connected with an end limiting adjusting piece. An elastic limiting piece connected to the crank arm in a sleeving mode is arranged between the limiting bent plate and the clamping fork. Wherein the limiting bent plate is arranged between the clamping fork and the connecting end of the bent arm and the conductive plate, the clamping fork is connected with rotating connecting levers, the two rotating connecting levers are connected with a clamp, and the clamp is sleeved on the static contact. According to the invention, the rotating shaft is preposed relative to the static contact cover, so that the rotating shaft and the moving contact can be switched on adaptively, and the problem of contact clamping stagnation caused by non-concentric central axes of the rotating shaft and the moving contact after the rotating shaft is contacted with the moving contact is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of stationary contacts, and in particular relates to a stationary contact device and a use method thereof. Background Art

[0002] Bell-shaped static contacts are often used in outdoor environments of DC power transmission projects due to their relatively closed structural characteristics. They can effectively reduce the increase in contact resistance caused by the accumulation of dirt due to the polarity effect of the DC field, thereby avoiding heating of the switchgear. This structure can be applied to disconnectors and earthing switches with plug-in closing. The static contacts are generally suspended vertically or placed horizontally, and are often affected by environmental factors such as wind or foundation errors, which cause the position of the bell-shaped static contacts to shift, and face problems such as increased contact resistance with the moving contact or inability to close. The existing bell-shaped static contact structure is either rigidly connected to the moving contact for closing, or has a rotating structure, but because its rotating shaft is rearward relative to the static contact cover, it often causes contact jamming due to the non-concentricity of the central axes of the two after contact with the moving contact.

[0003] The Chinese patent publication number is CN107887184A, and the name is a patent application for a grounding switch contact. The device includes a static contact conductor, a shielded static contact, a contact spring, a static arc-striking contact, a guide cylinder, a guide block, a buffer spring, an insulating gasket, a grounding switch moving contact, and a moving contact seat. The contact spring is sleeved on the outer wall of the middle hole of the shielded static contact, the guide cylinder and the static arc-striking contact are sleeved in the inner cavity of the shielded static contact, the buffer spring is sleeved on the outer end of the guide rod, and the two ends of the buffer spring are respectively against the inner wall of the cup-shaped conductor and the spring stop step of the guide cylinder, and an insulating gasket is provided between the buffer spring and the inner wall of the cup-shaped conductor; the conductive rod is movably sleeved in the moving contact seat, and the arc-resistant alloy of the moving contact on the conductive rod can be against the arc-resistant alloy of the static arc-striking contact on the cup-shaped conductor to achieve the closing of the switch. This patent application can buffer the impact of contact closing, but it still cannot resist the damage to the equipment caused by external vibration. Summary of the invention

[0004] In order to overcome the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a static contact device and a method of using the same, by adjusting the end limit adjustment member to adjust the distance between the clamping fork and the limit bending plate, the displacement distance of the static contact is limited; by adjusting the fixed angle of the limit bending plate, the rotation angle of the static contact is limited. By placing the rotating shaft in front of the static contact cover, the static contact can be adaptively closed with the moving contact, avoiding the contact jamming problem caused by the non-concentricity of the central axis of the two after contact with the moving contact.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A static contact device comprises: a conductive plate, a static contact is connected to the center of the bottom surface of the conductive plate; two curved arms with ends facing the static contact are respectively connected to the two ends of the bottom surface of the conductive plate; a limit bending plate and a clamping fork are sleeved on the outer side of the end of the curved arm away from the conductive plate, and an end limit adjustment piece is connected to the end of the curved arm away from the conductive plate; an elastic limit piece sleeved on the curved arm is arranged between the limit bending plate and the clamping fork; wherein the limit bending plate is arranged between the clamping fork and the connecting end of the curved arm and the conductive plate, a rotating crank arm is connected to the clamping fork, and two rotating crank arms are connected to a clamp, and the clamp is sleeved on the static contact.

[0006] Optionally, a spring cotter pin is provided on the end of the limit bending plate away from the crank arm.

[0007] Optionally, the limiting bent plate is an L-shaped plate, and the curved arm is an L-shaped rod.

[0008] Optionally, the elastic limiting member is a spring.

[0009] Optionally, the crank arm has a thread, and the end limit adjustment member is a nut.

[0010] Optionally, the bottom surface of the conductive plate is connected to the static contact via a flexible connector.

[0011] Optionally, a terminal hole is provided on a side of the conductive plate facing away from the stationary contact.

[0012] Optionally, the clamp is a cylindrical clamp, and both ends are connected to the rotating crank arm through connecting pieces.

[0013] Optionally, the number of the clamps is two, and the clamps include a semi-cylinder, both ends of the semi-cylinder are connected with extension plates, the extension plate and the connecting plate are both provided with through holes, and the extension plate and the connecting plate are connected by a second fastener.

[0014] The method for using the static contact device comprises the following steps: The distance between the clamping fork and the limiting bent plate is adjusted by adjusting the end limiting adjusting piece to limit the displacement distance of the static contact; the rotation angle of the static contact is limited by adjusting the fixed angle of the limiting bent plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: A static contact device of the present invention is used for closing the isolating switch and the earthing switch to conduct electricity. The static contact device structure includes a conductive plate, a crank arm, a limit bend plate, an elastic limit member, an end limit adjustment member, a rotating crank arm, a clamp, a static contact and a flexible connector. The static contact is fixed by the clamp and can be rotated by the rotating crank arm. At the same time, it can be translated left and right under the constraint of the elastic limit member, which improves the environmental adaptability of the static contact and converts the rigid connection between the dynamic and static contacts caused by the earthquake into a flexible connection, reducing the destructive force of the seismic wave on the equipment. At the same time, the rotating crank arm, the clamp and the static contact are fastened by bolts to form an integral body, which is located at the rear end of the rotation point and can rotate around the crank arm. It can adaptively complete the closing with the moving contact to avoid the contact jamming problem caused by the non-concentricity of the central axis of the two after contact with the moving contact.

[0016] Compared with the non-movable fixing mode of directly connecting the bell-shaped static contact of the traditional isolating switch or earthing switch with the on-site conductor, the static contact device of the present invention has adaptive adjustment and multiple degrees of freedom in structure. The static contact device of the present invention has strong environmental adaptability and can meet the needs of isolating switches or earthing switches with vertical breaks or horizontal breaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings: Figure 1 It is a three-dimensional structural schematic diagram of the static contact device of the present invention; Figure 2 A bottom view of the stationary contact device of the present invention; Figure 3 A top view of the stationary contact device of the present invention; Figure 4 It is a front view of the static contact device of the present invention; Figure 5 is a schematic diagram of a limit bending plate of the present invention; Among them, 1. conductive plate; 2. curved arm; 3. elastic limiter; 4. limit bending plate; 5. spring cotter pin; 6. end limiter; 7. rotating crank arm; 8. static contact; 9. clamp; 10. soft connector; 11. terminal hole; 21. first fastener; 71. connecting piece; 72. clamp fork; 91. second fastener. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0019] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0020] In the description of the present invention, it should be understood that the terms “include” and “comprises” indicate the presence of described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, the singular forms of "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0022] The present invention is described in detail below with reference to the accompanying drawings.

[0023] A static contact device, characterized in that it comprises: a conductive plate 1, a static contact 8 is connected to the center of the bottom surface of the conductive plate 1; two curved arms 2 with two ends facing the static contact 8 are respectively connected to the two ends of the bottom surface of the conductive plate 1; a limit bent plate 4 and a clamping fork 72 are sleeved on the outer side of the end of the curved arm 2 away from the conductive plate 1, and an end limit adjustment member 6 is connected to the end of the curved arm 2 away from the conductive plate 1; an elastic limit member 3 sleeved on the curved arm 2 is arranged between the limit bent plate 4 and the clamping fork 72; wherein the limit bent plate 4 is arranged between the clamping fork 72 and the connecting end of the curved arm 2 and the conductive plate 1, a rotating crank arm 7 is connected to the clamping fork 72, and two rotating crank arms 7 are connected to a clamp 9, and the clamp 9 is sleeved on the static contact 8.

[0024] Specifically, the static contact 8 is a bell-type static contact.

[0025] A static contact device of the present invention, when used, comprises the following steps: The distance between the clamping fork 72 and the limit bending plate 4 is adjusted by adjusting the end limit adjustment member 6 to limit the displacement distance of the static contact 8; The rotation angle of the stationary contact 8 is limited by adjusting the fixed angle of the limit bending plate 4 .

[0026] The bell-shaped static contact of the traditional isolating switch or earthing switch is directly connected to the on-site conductor, which is an immovable fixed method, does not have adaptive adjustment, and lacks freedom in all directions in structure. The static contact housing of the present invention is fixed by a clamp and can be rotated by rotating the crank arm. At the same time, the present invention can be translated left and right under the constraint of the elastic limiter. Through the device of the present invention, the environmental adaptability of the static contact can be improved.

[0027] The rotating crank arm 7, the clamp 9 and the static contact 8 of the present invention are fastened together by the second fastener 91 to form a whole, which is located at the rear end of the rotation point and can rotate around the crank arm 2. It can adaptively complete the closing with the corresponding moving contact to avoid the contact jamming problem caused by the non-concentricity of the central axes of the two after contact with the moving contact.

[0028] Example 1 like Figures 1 to 4 As shown, a static contact device of the present invention comprises a conductive plate 1, a crank arm 2, an elastic limiter 3, a limiter bent plate 4, a spring cotter pin 5, an adjusting nut 6, a rotating crank arm 7, a static contact 8, a clamp 9 and a flexible connector 10. The static contact 8 is a bell-shaped static contact.

[0029] The conductive plate 1 shown is a substrate of an electronic device, and is used to support and connect various electronic components.

[0030] like Figure 1 and Figure 4 As shown, the conductive plate 1 has a terminal hole 11 for connecting with an external conductor. The terminal hole 11 matches the connecting portion of the external conductor.

[0031] Specifically, the terminal hole 11 is a hole in the wiring terminal for inserting a wire. The terminal hole 11 can ensure that the wire is firmly inserted and fixed to ensure the reliability of the electrical connection.

[0032] Specifically, one side of the conductive plate 1 is connected to the static contact 8 via a flexible connector 10 .

[0033] The soft connector 10 is a flexible structure used for conducting electricity in switch products. Specifically, the soft connector 10 is an organic conductive polymer or conductive rubber or metal nanowire.

[0034] Specifically, the terminal hole 11 is provided on the plate surface of the conductive plate 1 facing away from the flexible connector 10 .

[0035] Furthermore, the conductive plate 1 is a long strip plate, and the number of the terminal holes 11 is greater than one, and they are respectively distributed on both sides of the long axis center of the conductive plate 1. Specifically, the terminal holes 11 are respectively provided with two groups of terminal holes 11 on both sides of the long axis center of the conductive plate 1, and each group of terminal holes 11 has a total of six, which are arranged in three rows and two columns.

[0036] Specifically, the static contact 8 includes a base and a cylindrical member connected to each other. The bottom surface of the cylindrical member is connected to the top surface of the base, and the top of the cylindrical member is connected to the soft connector 10. Specifically, the static contact 8 is arranged at the center below the conductive plate 1. The conductive plate 1, the soft connector 10 and the static contact 8 can form a conductive loop by being connected.

[0037] The side of the conductive plate 1 facing away from the terminal hole 11 is connected to two curved arms 2 , and the two curved arms 2 are respectively connected to two ends of the conductive plate 1 .

[0038] Specifically, a surface of the conductive plate 1 facing away from the terminal hole 11 is fixedly connected to the curved arm 2 via a first fastener 21 .

[0039] Furthermore, the first fastener 21 includes a connecting plate and bolts sleeved on the crank arm 2, a through hole is provided in the center of the connecting plate, the through hole of the connecting plate passes through the top of the crank arm 2 and is fixedly connected to the side of the crank arm 2. A plurality of mounting holes are provided at the edge of the connecting plate, and the connecting plate is connected to the conductive plate 1 by passing the bolts through the mounting holes.

[0040] Specifically, the crank arm 2 is a cylindrical rod.

[0041] Further, the crank arm 2 is an L-shaped cylindrical rod, and the crank arm 2 includes a first rod and a second rod connected to each other, wherein the first rod is connected to the conductive plate 1 through a first fastener 21, and the second rod is connected to the clamp 9 through a rotating crank arm 7. Specifically, the two rotating crank arms 7 are both axially arranged along the long axis of the conductive plate 1.

[0042] The clamp 9 is sleeved outside the cylindrical part of the static contact 8. There are two clamps 9, specifically, the clamp 9 comprises a semi-cylinder, and both ends of the semi-cylinder are connected with an extension plate. Optionally, the two clamps 9 are the same size.

[0043] The semi-cylinders of the two clamps 9 can be assembled into a hollow cylinder. The diameter of the semi-cylinder of the clamp 9 matches the diameter of the cylindrical part of the static contact 8. The plate surfaces of the two extension plates of the clamp 9 are in the same plane. After the two clamps 9 are spliced, the extension plates of the two clamps 9 can fit each other.

[0044] A connecting piece 71 is sandwiched between the two extension plates at each end of the two clamps 9 .

[0045] The extension plate and the connecting piece 71 are both provided with through holes, and the extension plate and the connecting piece 71 are connected by a second fastener 91. Specifically, the extension plate of the clamp 9 is provided with a first connecting hole. The connecting piece 71 is provided with a second connecting hole, and the position of the second connecting hole corresponds to the position of the first connecting hole. The second fastener 91 is a bolt.

[0046] The two clamps 9 are sleeved on the outside of the cylindrical part of the static contact 8, and the two connecting plates are clamped between the extension plates of the two clamps 9 respectively, the first connecting hole is aligned with the second connecting hole, and the clamps 9 and the connecting plate 71 are connected to the static contact 8 through the second fastener 91.

[0047] The end of the connecting piece 71 facing away from the clamp 9 is fixedly connected to the rotating crank arm 7. Specifically, the end of the rotating crank arm 7 is embedded in the end of the connecting piece 71.

[0048] Specifically, the number of the first connection holes on the extension plate of each clamp 9 and the second connection holes on each connection plate 71 are both three, and are arranged longitudinally from top to bottom.

[0049] The rotating crank arm 7 is an L-shaped cylindrical rod. One end of the rotating crank arm 7 away from the connecting piece 71 is connected to a clamping fork 72 . The clamping fork 72 is movably sleeved on the end of the second rod of the crank arm 2 .

[0050] The limit bending plate 4 is sleeved on the second rod of the crank arm 2 .

[0051] Specifically, the end of the second rod member away from the first rod member has a thread, and the end of the second rod member close to the first rod member is not threaded. A through hole is opened on the limit bending plate 4, and the second rod member passes through the through hole of the limit bending plate 4, and the end of the second rod member passing through the limit bending plate 4 is installed with an end limit adjustment member 6.

[0052] An elastic stopper 3 sleeved on the crank arm 2 is provided between the stopper bend 4 and the clamping fork 72. The end stopper adjustment member 6 can limit the compression degree of the elastic stopper 3 and adjust the position of the clamping fork 72, thereby adjusting the degree of axial displacement of the stationary contact 8 along the long axis of the conductive plate 1.

[0053] Specifically, the elastic limiting member 3 is a spring, and the end limiting adjusting member 6 is a nut.

[0054] Specifically, the inner wall of the through hole of the limiting bent plate 4 is provided with threads, and the limiting bent plate 4 is fixed to the second rod member through the threads. By adjusting the initial installation angle, the angle of the limiting bent plate 4 after installation and fixation can be adjusted.

[0055] The limiting bent plate 4 is an L-shaped plate member, and includes a first plate member sleeved on the second rod member of the crank arm 2 and a second plate member connected to the first plate member.

[0056] Specifically, the first plate is perpendicular to the second rod of the crank arm 2, and the end of the second plate away from the first plate faces the side with the static contact 8. Further, the second plate is perpendicular to the first plate, and the long axis direction of the second plate is parallel to the axial direction of the second rod of the crank arm 2.

[0057] A spring cotter pin 5 is arranged on the second plate of the limit bending plate 4 .

[0058] Specifically, a through hole is formed on the second plate of the limit bending plate 4, and the spring cotter pin 5 is movably inserted into the through hole of the second plate of the limit bending plate 4. Further, the spring cotter pin 5 is a hollow cylinder with an axial opening, and during installation, the spring cotter pin 5 is compressed toward the opening direction and inserted into the through hole on the second plate of the limit bending plate 4, and then the compression of the spring cotter pin 5 is stopped, so that the spring cotter pin 5 and the through hole on the second plate of the limit bending plate 4 are interference fit.

[0059] Furthermore, the diameter of the end of the spring cotter pin 5 facing the rotating crank arm 7 is larger than the diameter of the hollow cylinder thereof, and a spring is disposed on the outer sleeve of the spring cotter pin 5 .

[0060] Furthermore, the distance between the through hole on the second plate of the limit bending plate 4 and the first plate is the same as the distance between the first plate and the end of the rotating arm 7 away from the connecting piece 71. Figure 5 As shown, when the stationary contact 8 rotates around the conductive plate 1, the spring cotter pin 5 can contact the rotating crank arm 7, thereby limiting the rotation range of the stationary contact 8, and the spring cotter pin 5 can reduce the impact between the stationary contact 8 and the rotating crank arm 7 to avoid equipment damage.

[0061] Example 2 Combine the following Figure 1 The specific implementation modes of the present invention are further described.

[0062] In this embodiment, the end limit adjustment member 6 is a nut, and the elastic limit member 3 is a spring.

[0063] The static contact device, when used, comprises the following steps: Since the rotating crank arm 7, the clamp 9 and the stationary contact 8 are fixedly connected, the rotating crank arm 7, the clamp 9 and the stationary contact 8 can be displaced as a whole along the long axis direction of the conductive plate 1. By rotating and adjusting the end limit adjustment member 6, the compression degree of the elastic limit member 3 and the distance between the clamping fork 72 and the limit bending plate 4 can be adjusted, thereby adjusting the displacement range of the rotating crank arm 7, the clamp 9 and the stationary contact 8 as a whole along the long axis direction of the conductive plate 1.

[0064] By adjusting the fixed angle of the limiting bent plate 4 , the rotation angle of the fixed contact 8 can be adjusted.

[0065] When external vibrations including earthquakes cause the static contact device to vibrate, the soft connector 10 used between the conductive plate 1 and the static contact 8 can ensure that the conductive plate 1 and the static contact 8 are conductive, while being able to displace when vibrated to avoid damage to the device. At the same time, the displacement and rotation angle of the rotating crank arm 7, the clamp 9 and the static contact 8 as a whole are restricted by the curved arm 2 and the limiting bent plate 4, thereby avoiding damage caused by collision during shaking of the device.

[0066] Unless otherwise specified, the device elements involved in the above embodiments are all conventional device elements, and the structural settings, working modes or control modes involved are all conventional settings, working modes or control modes in the art unless otherwise specified.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A stationary contact device, characterized in that: include: A conductive plate (1), wherein a stationary contact (8) is connected to the center of the bottom surface of the conductive plate (1); two curved arms (2) with their ends facing the stationary contact (8) are respectively connected to the two ends of the bottom surface of the conductive plate (1); a limit bending plate (4) and a clamping fork (72) are sleeved on the outer side of the end of the curved arm (2) away from the conductive plate (1); an end limit adjustment member (6) is connected to the end of the curved arm (2) away from the conductive plate (1); an elastic limit member (3) sleeved on the curved arm (2) is arranged between the limit bending plate (4) and the clamping fork (72); wherein the limit bending plate (4) is arranged between the clamping fork (72) and the connecting end of the curved arm (2) and the conductive plate (1); a rotating crank arm (7) is connected to the clamping fork (72); the two rotating crank arms (7) are connected to a clamp (9), and the clamp (9) is sleeved on the stationary contact (8).

2. A stationary contact device according to claim 1, characterized in that: A spring cotter pin (5) is provided on the end of the limit bending plate (4) away from the crank arm (2).

3. A stationary contact device according to claim 1, characterized in that: The limit bending plate (4) is an L-shaped plate, and the curved arm (2) is an L-shaped rod.

4. A stationary contact device according to claim 1, characterized in that: The elastic limiting component (3) is a spring.

5. A stationary contact device according to claim 1, characterized in that: The crank arm (2) is provided with a thread, and the end limit adjustment member (6) is a nut.

6. A stationary contact device according to claim 1, characterized in that: The bottom surface of the conductive plate (1) is connected to the static contact (8) via a flexible connector (10).

7. A stationary contact device according to claim 1, characterized in that: A terminal hole (11) is provided on a side of the conductive plate (1) facing away from the stationary contact (8).

8. A stationary contact device according to claim 1, characterized in that: The clamp (9) is a cylindrical clamp, and both ends are connected to the rotating crank arm (7) via connecting pieces (71).

9. A stationary contact device according to claim 8, characterized in that: The number of the clamps (9) is two, and the clamps (9) comprise a semi-cylinder, with extension plates connected to both ends of the semi-cylinder, through holes being provided on the extension plates and the connecting plates (71), and the extension plates and the connecting plates (71) are connected via a second fastener (91).

10. A method for using a stationary contact device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The distance between the clamping fork (72) and the limit bending plate (4) is adjusted by adjusting the end limit adjustment member (6) to limit the displacement distance of the stationary contact (8); The rotation angle of the stationary contact (8) is limited by adjusting the fixed angle of the limit bending plate (4).

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