Static contact structure, electric appliance and high-voltage electric appliance

Abstract

The utility model relates to a static contact structure, an electric appliance and a high-voltage electric appliance. The key points of the technical scheme are that the static contact structure comprises a plug, a diverter connected with the plug, a static contact connected with the diverter and an arc striking assembly connected with the static contact; the arc striking assembly is arranged above the shunt; the static contact and the arc striking assembly are respectively provided with a bending part, the connecting path of the static contact and the arc striking assembly is wave-shaped, and the part, far away from the static contact, of the arc striking assembly is parallel to the shunt; a high-voltage electric appliance or an electric appliance comprises a main body, a moving contact and a static contact structure. The moving contact and the static contact are matched with each other to control the on-off of the main body circuit; the static contact structure has the beneficial effects that the connecting path of the static contact and the arc striking assembly is wavy, the heat dissipation path and area are increased, and the heat dissipation efficiency of the static contact structure is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of electrical switch and element field, more specifically, it relates to a static contact structure, electrical apparatus and high voltage electrical apparatus. BACKGROUND

[0002] In prior art, static contact is the key element of control circuit on-off. At present, the common static contact is mostly adopted linear structure and is directly installed in electrical apparatus. This structure design is simple, but when on-off circuit, its form radiates slowly. The large amount of joule heat continuously generated is difficult to dissipate, which can cause the temperature of contact material to rise, and shorten the service life of static contact. SUMMARY

[0003] In view of the deficiencies in the prior art, a static contact structure, electrical apparatus and high voltage electrical apparatus are provided, which can increase the heat dissipation efficiency.

[0004] To achieve the above object, the following technical scheme is provided: a static contact structure, comprising a plug, a shunt connected to the plug, a static contact connected to the shunt, and an arc striking assembly connected to the static contact.

[0005] The arc striking assembly is arranged above the shunt.

[0006] The static contact and the arc striking assembly both have a bending portion, the connection path of the static contact and the arc striking assembly is in a wave shape, and the part of the arc striking assembly away from the static contact is parallel to the shunt.

[0007] Further optimization of the utility model, the arc striking assembly comprises a first arc extinguishing piece.

[0008] The static contact is provided with a contact point and a through hole.

[0009] The first arc extinguishing piece is provided with a plug-in part.

[0010] The plug-in part is plugged into the through hole, and the first arc extinguishing piece abuts against the contact point.

[0011] Further optimization of the utility model, the abutting surface of the first arc extinguishing piece and the contact point is smaller than the abutting surface of the contact point and the first arc extinguishing piece, which facilitates the guidance of arc flow to the first arc extinguishing piece.

[0012] Further optimization of the utility model, the arc striking assembly further comprises a second arc extinguishing piece and a third arc extinguishing piece.

[0013] The first arc extinguishing piece, the second arc extinguishing piece and the third arc extinguishing piece are connected in sequence, and the area gradually increases.

[0014] Further optimization of the utility model, the first arc extinguishing piece, the second arc extinguishing piece and the third arc extinguishing piece are arranged along the same extension direction, and the connection path is arranged in a curve.

[0015] The further optimization of the utility model discloses the shunt is manganese copper shunt;

[0016] The manganese copper shunt includes manganese copper and copper piece arranged at both sides of manganese copper.

[0017] Two copper pieces are connected with plug and static contact through welding or punching riveting respectively.

[0018] The further optimization of the utility model discloses the copper piece and manganese copper connecting place are sawtooth shape;

[0019] Or the manganese copper is provided with protrusion, and the copper piece is provided with recess that cooperates with protrusion.

[0020] The protrusion is inserted in recess.

[0021] An electric appliance includes main body, moving contact and static contact structure.

[0022] The moving contact and static contact structure cooperate with each other to control main body circuit on-off.

[0023] The static contact structure is the static contact structure as above.

[0024] A high-voltage electric appliance includes main body, moving contact and static contact structure.

[0025] The moving contact and static contact structure cooperate with each other to control main body circuit on-off.

[0026] The static contact structure is the static contact structure as above.

[0027] The static contact and arc striking assembly connecting path is wave-shaped in the technical scheme, and the heat dissipation path and area are increased, so that the heat dissipation efficiency of the static contact structure is increased. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The utility model discloses the three-dimensional structure schematic drawing of static contact structure.

[0029] Figure 2 The utility model discloses the three-dimensional structure schematic drawing of static contact and arc extinguishing assembly cooperation.

[0030] Figure 3 The utility model discloses the three-dimensional structure schematic drawing of shunt.

[0031] Figure 4 The utility model discloses the plane structure schematic drawing of static contact structure.

[0032] Reference numerals: 1. Plug; 2. Shunt; 21. Protrusion; 22. Groove; 3. Stationary contact; 31. Contact point; 32. Through hole; 4. Arc ignition assembly; 41. First arc extinguishing plate; 42. Second arc extinguishing plate; 43. Third arc extinguishing plate; 44. Connector. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0034] Reference Figures 1-4 As shown, a stationary contact 3 structure includes a plug 1, a shunt 2 connected to the plug 1, a stationary contact 3 connected to the shunt 2, and an arc-starting assembly 4 connected to the stationary contact 3.

[0035] Arc-starting assembly 4 is positioned above shunt 2;

[0036] Both the stationary contact 3 and the arc-starting assembly 4 have bent portions. The connection path between the stationary contact 3 and the arc-starting assembly 4 is wavy, and the portion of the arc-starting assembly 4 away from the stationary contact 3 is parallel to the shunt 2.

[0037] The connection path between the stationary contact 3 and the arc-starting assembly 4 is as follows: Figure 1 and Figure 4 As shown, this arrangement increases the path length between the stationary contact 3 and the arc-starting assembly 4, which helps to disperse the Joule heat generated when the circuit is switched on and off (the control point of the circuit is on the stationary contact 3 and close to the arc-starting assembly 4). By extending the heat conduction path, the heat dissipation efficiency is improved, thereby reducing the temperature rise of the stationary contact 3 material and extending its service life.

[0038] Wavy paths also help to avoid the circuitry of equipment. Different avoidance paths can be set according to different equipment to adapt to different equipment and achieve a compact design. Fixed avoidance paths can also be set only to increase the path length and facilitate heat dissipation.

[0039] The magnetic field of the shunt 2 is set parallel to the magnetic field of the arc ignition assembly 4 and works together to help the arc ignition assembly 4 better guide the arc on the stationary contact 3 into the arc ignition assembly 4.

[0040] The plug 1, shunt 2, stationary contact 3, and arc ignition assembly 4 can all be connected by welding.

[0041] Preferably, the arc-initiating assembly 4 includes a first arc-extinguishing plate 41;

[0042] The stationary contact 3 is provided with a contact 31 and a through hole 32;

[0043] The first arc-extinguishing piece 41 is provided with a plug 44;

[0044] The plug 44 is plugged into the through hole 32, and the first arc-extinguishing piece 41 abuts against the contact 31.

[0045] The first arc-extinguishing piece 41 is connected to the stationary contact 3 in a manner as shown in Figure 1 and Figure 2 This connection manner ensures that the first arc-extinguishing piece 41 is in close contact with the stationary contact 3 and the contact 31, facilitating the quick guiding of the electric arc to the first arc-extinguishing piece 41 when the circuit is switched on and off;

[0046] The plugging relationship between the plug 44 and the through hole 32 provides mechanical fixation and electrical connection, preventing the first arc-extinguishing piece 41 from being displaced;

[0047] The abutting surface between the first arc-extinguishing piece 41 and the contact 31 is designed as a plane or a curved surface, ensuring uniform distribution of the electric arc and reducing local overheating;

[0048] The plug 44 and the through hole 32 are fixed by interference fit or welding, etc. to enhance stability.

[0049] Preferably, the abutting surface between the first arc-extinguishing piece 41 and the contact 31 is smaller than the abutting surface between the contact 31 and the first arc-extinguishing piece 41, facilitating the guiding of the electric arc to the first arc-extinguishing piece 41.

[0050] As shown in Figure 1 the abutting surface between the first arc-extinguishing piece 41 and the contact 31 is smaller than the abutting surface between the contact 31 and the first arc-extinguishing piece 41, and this size difference creates an electric field gradient, preferentially attracting the electric arc to the first arc-extinguishing piece 41 when the circuit is switched on and off, thereby effectively guiding the electric arc away from the contact 31 of the stationary contact 3, reducing the erosion and burning of the contact 31 by the electric arc;

[0051] At the same time, the heat dissipation characteristics of the U-shaped curved path are combined to reduce the overall thermal load.

[0052] Preferably, the arc assembly further comprises a second arc-extinguishing piece 42 and a third arc-extinguishing piece 43;

[0053] The first arc-extinguishing piece 41, the second arc-extinguishing piece 42, and the third arc-extinguishing piece 43 are connected in sequence and gradually increase in area.

[0054] As shown in Figure 1 the first arc-extinguishing piece 41, the second arc-extinguishing piece 42, and the third arc-extinguishing piece 43 are connected in sequence and gradually increase in area, and this stepwise arrangement realizes the staged guiding and arc extinguishing of the electric arc;

[0055] The arc is first guided to the first arc-extinguishing sheet 41 with a small area for initial arc extinguishing, and then diffuses to the second arc-extinguishing sheet 42 and the third arc-extinguishing sheet 43 with larger areas in sequence, gradually dispersing arc energy and heat, and improving arc extinguishing efficiency;

[0056] The design of increasing area also enlarges the heat dissipation surface, and in combination with the U-shaped curved path, further enhances the heat dissipation capacity and prevents local overheating;

[0057] Meanwhile, only the first arc-extinguishing sheet 41, the second arc-extinguishing sheet 42 and the third arc-extinguishing sheet 43 can be implemented to guide the arc from the first arc-extinguishing sheet 41 to the third arc-extinguishing sheet 43 for arc extinguishing.

[0058] The first arc-extinguishing sheet 41, the second arc-extinguishing sheet 42 and the third arc-extinguishing sheet 43 can be connected by welding.

[0059] Preferably, the first arc-extinguishing sheet 41, the second arc-extinguishing sheet 42 and the third arc-extinguishing sheet 43 are arranged along the same extension direction, and the connection path is arranged in a curve.

[0060] The arrangement path of the first arc-extinguishing sheet 41, the second arc-extinguishing sheet 42 and the third arc-extinguishing sheet 43 is as shown in Figure 2 and Figure 4 Such arrangement ensures the continuity and consistency of the arc guiding path, and reduces arc jumping;

[0061] The curved path prolongs the arc moving distance, provides more arc extinguishing time, and in combination with the arc-extinguishing sheets with gradually increasing area, realizes smooth arc transition and high-efficiency arc extinguishing.

[0062] The curved arrangement also increases the overall heat dissipation area of the arc-extinguishing sheet group, and in combination with the wave-shaped static contact 3 structure, further reduces temperature rise.

[0063] The curved connection between the arc-extinguishing sheets can be realized by a curved conductive plate or a flexible connecting piece to adapt to different installation spaces.

[0064] Preferably, the shunt 2 is a manganese copper shunt;

[0065] The manganese copper shunt includes manganese copper and copper pieces arranged on both sides of the manganese copper;

[0066] The two copper pieces are connected with the plug 1 and the static contact 3 by welding or impact riveting.

[0067] The shunt 2 adopts the manganese copper shunt including the copper pieces and the manganese copper. The manganese copper material has high resistivity and low temperature coefficient, which is convenient for accurate shunting and current measurement when the circuit is turned on and off;

[0068] Welding can form metallurgical bonding to ensure low contact resistance and electrical continuity;

[0069] Punch riveting connection provides mechanical strength and resistance to vibration loosening;

[0070] Both processes can achieve stable and reliable fixation, adapting to different production process requirements.

[0071] Preferably, the copper piece and the manganese copper connection are serrated;

[0072] Or the manganese copper is provided with a protrusion 21, and the copper piece is provided with a groove 22 matched with the protrusion 21;

[0073] The protrusion 21 is inserted into the groove 22.

[0074] As shown in the figure, the copper piece and the manganese copper connection are serrated, which increases the contact area and mechanical interlocking of the connection, improves the connection strength and electrical stability, and reduces the contact resistance; Figure 3

[0075] The serrated connection can also be filled with silver solder or conductive paste to enhance conductivity;

[0076] As shown in the figure, the protrusion 21 of the manganese copper is inserted into the groove 22 of the copper piece, forming mechanical interlocking and electrical connection, which ensures the alignment and fixation between the copper piece and the manganese copper, reduces the relative displacement and contact resistance; Figure 3

[0077] The cooperation of the protrusion 21 and the groove 22 increases the effective contact area and improves current transmission.

[0078] An electrical appliance includes a main body, a movable contact and a static contact 3 structure;

[0079] The movable contact and the static contact 3 structure cooperate to control the on-off of the main body circuit;

[0080] The static contact 3 structure is as described above.

[0081] The electrical appliance controls the on-off of the circuit through the cooperation of the movable contact and the static contact 3 structure, and the static contact 3 structure adopts the design as described above, has the characteristics of wavy connection path, arc guiding assembly 4 and shunt 2, and effectively manages the arc and heat dissipation during the on-off process;

[0082] When the movable contact contacts the static contact 3, the current passes through the static contact 3 structure, and the wavy path and the shunt 2 thereof optimize the current distribution and heat dissipation, reducing the accumulation of joule heat and prolonging the service life of the electrical appliance;

[0083] The arc guiding assembly 4 guides the arc away from the contact point 31, preventing the contact point 31 from burning out.

[0084] A high-voltage electrical appliance includes a main body, a movable contact and a static contact 3 structure;

[0085] ​​The movable contact and the fixed contact 3 structure cooperate to control the on-off of the main circuit.

[0086] The fixed contact 3 structure is as described above.

[0087] The high-voltage electrical appliance operates under high-voltage conditions, the movable contact and the fixed contact 3 structure cooperate to control the on-off of the circuit, and the fixed contact 3 structure is designed as described above, the wavy connection path and the arc guiding assembly 4 are particularly suitable for high-voltage environments, and the risk of electrical breakdown and overheating is reduced by increasing the heat dissipation area and guiding the arc;

[0088] The shunt 2 (such as a manganese copper shunt) ensures accurate current shunting, and in combination with the wavy arrangement, the electric field distribution and thermal management are optimized.

[0089] The above is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical solution falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that for ordinary skilled persons in the art, some improvements and decorations without departing from the principles of the present application are also considered to be within the protection scope of the present application.

Claims

1. A stationary contact structure, characterized in that The plug, the shunt connected with the plug, the static contact connected with the shunt and the arc striking assembly connected with the static contact are included. The arc striking assembly is arranged above the shunt. The static contact and the arc striking assembly both have bending parts, the connection path of the static contact and the arc striking assembly is in a wave shape, and the part of the arc striking assembly away from the static contact is parallel to the shunt.

2. The stationary contact structure according to claim 1, characterized in that The arc striking assembly includes a first arc extinguishing piece. The static contact is provided with a contact point and a through hole. The first arc extinguishing piece is provided with a plug-in part. The plug-in part is plugged into the through hole, and the first arc extinguishing piece abuts against the contact point.

3. The stationary contact structure according to claim 2, characterized in that The abutting surface of the first arc extinguishing piece against the contact point is smaller than the abutting surface of the contact point against the first arc extinguishing piece, so as to facilitate guiding the arc to flow to the first arc extinguishing piece.

4. The stationary contact structure of claim 2, characterized in that The arc striking assembly further includes a second arc extinguishing piece and a third arc extinguishing piece. The first arc extinguishing piece, the second arc extinguishing piece and the third arc extinguishing piece are connected in sequence and gradually increase in area.

5. The stationary contact structure of claim 4, characterized in that The first arc extinguishing piece, the second arc extinguishing piece and the third arc extinguishing piece are arranged along the same extension direction, and the connection path is arranged in a curve.

6. The stationary contact structure of claim 1, wherein The shunt is a manganese copper shunt. The manganese copper shunt includes manganese copper and copper pieces arranged on both sides of the manganese copper. The two copper pieces are connected with the plug and the static contact through welding or punch riveting.

7. The stationary contact structure according to claim 6, characterized in that The connection between the copper piece and the manganese copper is in a sawtooth shape. Or the manganese copper is provided with a protrusion, and the copper piece is provided with a groove matched with the protrusion. The protrusion is plugged into the groove.

8. An electrical appliance characterized by The main body, the moving contact and the static contact structure are included. The moving contact and the static contact structure cooperate to control the on-off of the main body circuit. The static contact structure is as claimed in any one of claims 1-7.

9. A high voltage electric appliance, characterized by comprising: The main body, the moving contact and the static contact structure are included. The moving contact and the static contact structure cooperate to control the on-off of the main body circuit. The static contact structure is as claimed in any one of claims 1-7.

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