A fast switching operating mechanism

Abstract

The present application provides a fast switching operating mechanism, including a base, a two-way switching knife switch and a knife switch connecting moving contact arranged on the base, a protection static contact and a short-circuit grounding static contact are arranged on both sides of the knife switch connecting moving contact on the base, the protection static contact is used to connect the protection secondary current circuit, and the knife switch connecting static contact is used to connect the short-circuit grounding circuit; the two-way switching knife switch is hinged with the knife switch connecting moving contact and can be rotated to both sides thereof to realize the electrical connection of the knife switch connecting moving contact with the protection static contact or the short-circuit grounding static contact respectively; the two-way switching knife switch is provided with a switching operating handle, and an interlocking lock buckle is provided on the base, and the interlocking lock buckle is used to lock the switching operating handle when the two-way switching knife switch is closed with the protection static contact or the short-circuit grounding static contact. The two-way switching knife switch can realize the fast switching operation of the connection mode of the secondary circuit of the current transformer, thereby improving the operation efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of electric power equipment, and more specifically, to a fast switching operating mechanism. Background Art

[0002] When performing maintenance work on the power system, it is necessary to short-circuit and exit the secondary current circuit of the corresponding current transformer to isolate the current circuit of the maintenance equipment from that of the operating equipment. To achieve this function, a large current switching operating component is required to connect or isolate the secondary current circuit. This component is generally called a large current switching terminal in the substation. These operations are mainly aimed at isolating the secondary current circuit of the current transformer of the equipment under maintenance from the secondary circuit of the current transformer of the equipment under maintenance.

[0003] At present, the large current switching operating components used in the power system are mainly bolt-type switching components. Since the operating components of the switching components are bolt structures, the operation process requires rotating these connecting bolts multiple times. One operation often includes four or five such bolts, so it takes a long time and the operating efficiency is extremely low. Summary of the invention

[0004] In view of this, the present application provides a fast switching operation mechanism for improving the operation efficiency when switching the connection mode of the secondary circuit of the current transformer.

[0005] In order to achieve the above objectives, the proposed solution is as follows:

[0006] A fast switching operating mechanism comprises a base, a two-way switching knife switch and a knife switch connecting moving contact arranged on the base, a protection static contact and a short-circuit grounding static contact are arranged on both sides of the knife switch connecting moving contact on the base, the protection static contact is used to connect a protection secondary current loop, and the knife switch connecting static contact is used to connect a short-circuit grounding loop;

[0007] The bidirectional switching knife switch is hinged to the knife switch connecting moving contact and can rotate to both sides thereof to realize electrical connection of the knife switch connecting moving contact with the protection static contact or the short-circuit grounding static contact respectively;

[0008] The bidirectional switching knife switch is provided with a switching operating handle, and an interlocking lock is provided on the base, and the interlocking lock is used to lock the switching operating handle when the bidirectional switching knife switch is closed with the protective static contact or the short-circuit grounding static contact.

[0009] Optionally, the short-circuit grounding static contact is connected to a short-circuit grounding bolt disposed below the base, and the short-circuit grounding bolt is used to connect the short-circuit grounding loop;

[0010] The knife switch connecting moving contact is connected to the secondary circuit connection bolts arranged below the base, and the secondary circuit connection bolts are used to connect the secondary circuit of the current transformer;

[0011] The protection static contact is connected to a protection secondary circuit connection bolt arranged below the base, and the protection secondary circuit connection bolt is used to connect the protection secondary current circuit.

[0012] Optionally, the interlocking buckle comprises a male buckle and a female locking piece, wherein:

[0013] The male buckle is arranged on the switching operating handle;

[0014] The female lock plate is a butterfly-shaped structure formed by stamping and bending, and is provided with a connecting transmission shaft hole, a groove for installing a torsion spring, a snap groove and an insulating guide strip inclined at an angle of 120 degrees to the female lock plate. The female lock plate, the connecting shaft, the torsion spring and the U-shaped base are arranged on the base, and the female lock plate can be elastically bent by the torsion spring to move left and right. When the two-way switching knife switch is switched to contact and close with the protective static contact or the short-circuit grounding static contact, the operating handle drives the male buckle to press downward to the insulating guide strip, and pushes the torsion spring through the 120-degree guiding angle to make the female lock plate move to one side. When the switching operating handle with the male buckle is operated in place, the female lock plate rebounds and locks the male buckle under the action of the torsion spring, thereby locking the switching operating handle.

[0015] Optionally, the two small wing portions at the lower end of the female lock plate are bent to form the groove, and the groove cooperates with the U-shaped base to form the transmission shaft hole. The groove, the torsion spring and the shaft are cooperated to form an interlocking mechanism that can elastically reciprocate, and a snap groove is formed at the lower end of the large wing portion at the upper end of the female lock plate. The shortest portion at the highest end of the female lock plate is bent into an angle of 120 degrees as a guide angle for cooperating with the male buckle, and is inlaid with an insulating guide strip.

[0016] Optionally, the male buckle is a semicircular head columnar structure extending outwardly of the switching operating handle, which serves as a guide and a locking buckle against the buckle end face of the female lock plate.

[0017] Optionally, a female lock plate base fixing groove for installing the female lock plate is provided on the base, and the U-shaped base is embedded in and fixed in a male lock head fixing groove on the base by bolts.

[0018] Optionally, the short-circuit grounding static contact and the protective static contact both include a copper sheet of a finger-contact structure, the copper sheet is formed by stamping and bending a single copper material, a spring sheet in contact with the closing of the two-way switching knife switch is arranged in the middle of the upper part of the copper sheet, and the bottom is connected to the base by an integrally formed bolt or a welded integrally formed bolt, two spring clips are inserted in the middle of the copper sheet, the two ends of the spring clips respectively abut against the upper and lower sides of the two outer sides of the spring sheet, and the two outer side surfaces of the spring clip abut against the inner side surfaces of the two outer walls of the copper sheet;

[0019] The protection static contact or the short-circuit grounding static contact is embedded in the fixing groove of the base so that it will not shift forward and backward, and the spring clip is aligned with the spring leaf.

[0020] Optionally, two flexible connecting wires are welded on the left and right sides of the bidirectional switching knife switch located above the rotation point and between the knife switch connecting moving contact.

[0021] Optionally, the short-circuit grounding bolt and the short-circuit grounding static contact, the secondary circuit connection bolt and the knife switch connecting moving contact, and the protection secondary current circuit connection bolt and the protection static contact are all integrally formed or directly welded bolts.

[0022] Optionally, the bolts of the short-circuit grounding bolts are connected via a short-circuit conductive sheet.

[0023] Optionally, an arc cover is provided on the base, wherein:

[0024] The arc cover is provided with a transverse electrical isolation chamber and a longitudinal electrical isolation chamber, and is provided with a closing stop notch and a positioning edge that matches the positioning notch of the cover.

[0025] Optionally, a stationary contact fixing groove is provided on the base, and a bolt through hole is provided in the middle of the stationary contact fixing groove;

[0026] The protection secondary current circuit connection bolt passes through the bolt hole of the protection static contact and the bolt through hole on the base from top to bottom, and then is tightened and fixed by a nut on the reverse side of the base;

[0027] The short-circuit grounding bolt passes through the bolt hole of the protective static contact and the bolt through hole of the base from top to bottom, and then is tightened and fixed on the reverse side of the base by a nut;

[0028] The secondary circuit connection bolts are passed from top to bottom through the bolt holes of the knife switch connecting the moving contacts and the bolt through holes of the base, and then are tightened and fixed by nuts on the reverse side of the base.

[0029] It can be seen from the above technical scheme that the present application discloses a fast switching operating mechanism, including a base, a two-way switching knife switch and a knife switch connecting moving contact arranged on the base, a protection static contact and a short-circuit grounding static contact are arranged on both sides of the knife switch connecting moving contact on the base, the protection static contact is used to connect the protection secondary current circuit, and the knife switch connecting static contact is used to connect the short-circuit grounding circuit; the two-way switching knife switch is hinged with the knife switch connecting moving contact and can be rotated to both sides thereof to realize the electrical connection of the knife switch connecting moving contact with the protection static contact or the short-circuit grounding static contact respectively; the two-way switching knife switch is provided with a switching operating handle, and an interlocking lock is provided on the base, and the interlocking lock is used to lock the switching operating handle when the two-way switching knife switch is closed with the protection static contact or the short-circuit grounding static contact. The two-way switching knife switch can realize the fast switching operation of the connection mode of the secondary circuit of the current transformer, avoiding the problem of the existing bolt-type switching components taking a long time to switch the connection of the secondary circuit, thereby improving the operating efficiency.

[0030] Furthermore, the present application avoids the problem of poor safety caused by short electrical spacing in traditional bolt structures, and is easy to operate, has clear directions, and is fast, which effectively improves circuit switching efficiency and improves safety.

[0031] Through the interlocking lock structure, the two-way switching knife switch is effectively locked after closing with the protective static contact of the secondary current circuit, avoiding accidental contact or pulling that may cause false operation of the protection, thus effectively improving safety.

[0032] The female lock piece with a butterfly-shaped structure formed in one piece by stamping and bending is easy to manufacture, has high locking reliability and low cost.

[0033] The grounding static contact and the protective static contact adopt a three-stage finger-touch structure enhanced by a double spring clip, which can effectively achieve adaptive fitting and pressing on the six sides of the two-way switching knife switch, thereby maintaining effective electrical connection contact at all times.

[0034] The moving and static contacts and bolts on the base are integrally formed or welded, with a firm structure, which effectively prevents the connection bolts from rotating and loosening, and avoids the occurrence of electrical faults such as poor contact.

[0035] The two-way switching knife switch welds two flexible soft wires between the knife switch connecting static contacts above and below the rotating point, which can effectively improve the electrical conduction effect and avoid electrical conduction failures caused by poor contact due to long-term rotation of the intermediate rotating parts.

[0036] The bolts of the short-circuit grounding bolts are connected by a short-circuit conductive sheet, which can effectively prevent the grounding performance of individual bolts from being reduced or the grounding circuit from being broken, thereby improving the grounding conduction effect.

[0037] The arc-shaped cover structure can effectively isolate the internal moving and static contacts from each other electrically, preventing falling objects from causing short circuits. At the same time, the arc and the metal part of the switch are fully shielded and isolated, preventing the operator from accidentally touching the metal part caused by the switch during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of a fast switching operating mechanism according to an embodiment of the present application;

[0040] Figure 2 for Figure 1 The enlarged schematic diagram of part A in the middle;

[0041] Figure 3 for Figure 1 The enlarged schematic diagram of part B in the middle;

[0042] Figure 4 A schematic diagram of the structure of a locking mechanism of a fast switching operating mechanism of an embodiment of the present application;

[0043] Figure 5 This is a schematic diagram of the overall appearance of the fast switching operating mechanism of an embodiment of the present application;

[0044] Figure 6 A schematic diagram of the structure of a base of a fast switching operating mechanism according to an embodiment of the present application;

[0045] Figure 7 It is a schematic structural diagram of the cover of the fast switching operating mechanism according to an embodiment of the present application.

[0046] In the figure: 1-base; 2-two-way switching knife switch; 3-knife switch connecting static contact; 4-protective static contact; 5-short-circuit grounding static contact; 6-protection secondary current loop wiring bolt; 7-current transformer secondary loop wiring bolt; 8-short-circuit grounding bolt; 9-short-circuit conductive sheet; 10-male buckle; 11-female lock plate; 12-female lock plate base; 13-female lock plate fixing shaft; 14-female lock plate torsion spring; 15-cover; 101-female lock plate base fixing groove; 102-moving and static contact fixing groove; 103-cover positioning notch; 104-cover nut hole; 201-switching operating handle; 202-blade; 501-copper sheet; 502-large and small spring cards; 50101-contact spring. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] Example

[0049] This embodiment provides a fast switching operation mechanism, such as Figure 1 As shown, it specifically includes a base 1 and a two-way switching knife switch 2, on which a protection static contact 4 for connecting a protection secondary current circuit, a short-circuit grounding static contact 5 and a knife switch connecting static contact 3 for connecting the secondary circuit of a current transformer are arranged, the short-circuit grounding static contact 5 and the protection static contact 4 are respectively arranged on the left and right sides of the knife switch connecting static contact 3, the two-way switching knife switch 2 is connected to the knife switch connecting static contact 3, and can be rotated in two directions, left or right, to achieve closing contact with the grounding static contact 5 or the protection static contact 4 on both sides.

[0050] The two-way switch 2 is provided with a switching operating handle 201, and an interlocking lock buckle is provided on the switching operating handle 201 and one side of the base 1 located at the protective static contact 4. When the two-way switch 2 is switched to contact with the protective static contact 4 or the short-circuit grounding static contact 5 for closing, the interlocking lock buckle is locked to lock the male buckle 10 of the switching operating handle 201. Figure 4 shown.

[0051] In order to achieve the reliability of wiring, the grounding static contact 5 is connected to the short-circuit grounding bolt 8, the knife switch connection static contact 3 is connected to the current transformer secondary circuit wiring bolt 7, and the protection static contact 4 is connected to the protection secondary current circuit wiring bolt 6. The present application connects each circuit through the wiring bolt, which has high reliability.

[0052] like Figure 4 As shown, in order to realize the interlocking structure, the interlocking lock includes a male buckle 10 and a female lock plate 11. The female lock plate is arranged on the base 1, on which a female lock plate base 12 is provided, including a transmission connection of a transmission shaft 13 connecting the locking plate shaft hole and the female lock plate base 12 and a torsion spring 14 located in the locking plate groove. When the two-way switching knife switch 2 is switched to contact and close with the protective static contact 4 or switched to contact and close with the grounding static contact 5 on the other side, the male buckle 10 located on the switching handle contacts with the insulating guide part of the insulating guide head of the female lock plate. When the arc part of the male buckle 10 is pressed down, the female lock plate overcomes the pulling force of the torsion spring and moves laterally and enters the female lock plate buckle, and the male buckle 10 is pressed by the torsion spring rebound lock. The structure is simple and the interlocking structure is conveniently realized.

[0053] In order to achieve the lateral movement of the female lock plate 11 and the entry into the female lock plate buckle of the male buckle 10 when the male buckle 10 is pressed down, the insulating guide head of the female lock plate is bent into a 120-degree guide angle, and the column head of the male buckle 10 is processed into an arc shape. When the switch is closed, when the arc-shaped column head of the male buckle 10 is pressed down to the insulating guide head of the female lock pressing plate, the pressure is decomposed into two components, lateral and vertical downward. The lateral pressure causes the female lock plate torsion spring 14 to bend laterally, and the female lock plate 11 is displaced laterally as a whole. The male buckle 10 finally slides into the buckle hole of the female lock plate 11, and the torsion spring rebounds to cause the female lock plate to lock and press the male buckle 10, effectively realizing the interlocking of the locks.

[0054] In order to prevent the two-way switching knife switch 2 from moving vertically downward again after interlocking, the switching switch cover is used to stop the switch.

[0055] In order to fix the female lock piece 11 and the female lock piece torsion spring 14, the base 1 is provided with a female lock piece base fixing groove 101, and the female lock piece base 12 (i.e., a horizontally fixed U-shaped base) is embedded in the female lock piece base fixing groove 101 and fixed by the shaft 13. To facilitate the fixation of the female lock piece 11, the female lock piece 11 is embedded in the female lock piece base fixing groove 101 to achieve lateral positioning and fixing.

[0056] In order to reduce the cost, the female lock piece 11 is a stamping and bending integrally formed structure, which is easy to manufacture and low in cost.

[0057] In order to achieve reliable contact and pressing with the blade 202 of the two-way switching knife switch 2, as Figure 2 As shown, the grounding static contact 5 includes a copper sheet 501 with a finger-contact structure. The copper sheet 501 is formed by stamping and bending a single copper material. The middle of the upper part is a spring sheet 50101 that contacts the two-way switching knife switch 2 when it is closed. The bottom is an integrally welded stud. Two spring clips 502 of different heights are inserted in the middle of the copper sheet 501. The upper ends of the two spring clips 502 respectively abut against the two outer side surfaces of the spring sheet 501, and the two outer side surfaces of the two spring clips 502 abut against the upper and lower inner side surfaces of the two outer walls of the copper sheet 501.

[0058] The protection static contact 4 and the grounding static contact 5 adopt the same structure; the bottom of the knife switch connection static contact 3 is an integrally welded stud, which can effectively prevent electrical conduction failures caused by poor contact due to bolt crimping, and improve the path performance. The finger-touch structure is adopted to divide the two contact surfaces into three contact surfaces, so that each contact surface can adapt to the inserted blade 202 for good contact. At the same time, in order to further increase the contact pressure, two spring clips 502 are inserted into the copper sheet 501, which effectively improves the multi-point compression elasticity of the spring sheet 50101, and the blade 202 of the two-way switching knife switch 2 is contacted and compressed by three surfaces on each side, so that the contact surface can always be effectively contacted.

[0059] like Figure 6As shown, in order to realize the connection and fixation of the static contact and the bolt, the base 1 is provided with a moving and static contact fixing groove 102, and a bolt through hole is provided in the middle of the moving and static contact fixing groove 102. After the protection secondary current circuit wiring bolt 6 passes through the bolt hole of the protection static contact 4 and the bolt through hole of the base 1 from top to bottom, it is tightened and fixed by a nut on the reverse side of the base 1; the short-circuit grounding bolt 8 passes through the bolt hole of the grounding static contact 5 and the bolt through hole of the base 1 from top to bottom, and then is tightened and fixed by a nut on the reverse side of the base 1; the current transformer secondary circuit wiring bolt 7 passes through the bolt hole of the knife switch connecting the moving contact 3 and the bolt through hole of the base 1 from top to bottom, and then is tightened and fixed by a nut on the reverse side of the base). The connection and fixation of the static contact and the bolt on the base 1 is conveniently realized.

[0060] In order to prevent the electrical conduction failure caused by the poor contact caused by the long-term rotation of the middle rotating part of the two-way switching knife switch 2, two left and right flexible soft braided spiral wires 203 are welded between the two welding points 204 of the blade 202 and the moving contact base 3 of the two-way switching knife switch 2, such as Figure 3 As shown, this can effectively prevent electrical conduction failures caused by poor contact due to long-term rotation of the intermediate rotating parts, thereby improving the path performance.

[0061] In order to improve the grounding conduction effect, each bolt of the short-circuit grounding bolt 8 is connected by a short-circuit conductive sheet 9. This prevents the grounding performance of individual connection bolts from being degraded or the grounding circuit from being broken, thereby improving the grounding conduction effect.

[0062] In order to fully consider the risk of electric shock during the operation of electrical insulation, an arc-shaped cover is used, such as Figure 5 As shown, the exposed outer portion of the knife blade 202 cannot touch the finger portion, and at the same time, a groove is provided on the base 1 and the outer edge of the arc-shaped cover is completely stuck in the groove to achieve separation, and a phase electrical isolation chamber is provided inside the cover, such as Figure 7 As shown, the moving and static contacts are isolated from each other to prevent the occurrence of short circuits caused by loose parts and falling.

[0063] The fast switching operation component current transformer secondary circuit wiring bolt 7 is connected to the secondary current output by the current transformer, the protection secondary current circuit wiring bolt 6 is connected to the protection secondary current collection circuit, and the short-circuit grounding bolt 8 is connected to the short-circuit grounding circuit.

[0064] During normal operation, the blade 202 of the two-way switching knife switch 2 contacts the protective static contact 4 connected to the protective secondary current circuit, and the secondary current of the current transformer is connected to the protective secondary current circuit. At the same time, the interlocking lock locks the switching operation handle 201, so that the switching operation handle 201 cannot be pulled open due to accidental contact, etc., thereby avoiding the occurrence of open-circuit accidents in the secondary current circuit during normal operation; when the primary equipment corresponding to the current transformer is under maintenance, the blade 202 of the two-way switching knife switch 2 is switched to the short-circuit grounding static contact 5 of the secondary current circuit, so that the secondary current circuit output by the current transformer is isolated from the protected secondary current circuit, and short-circuit grounding is achieved; the problem of poor safety caused by the short electrical spacing of the traditional bolt structure is avoided, and it has an anti-tripping locking function, is safe and reliable, has strong current conduction and switching capabilities, is easy to operate, has high operating efficiency, and has fast switching operations, which effectively improves the circuit switching efficiency and improves safety.

[0065] In this example, the grounding static contact 5, the knife switch connection static contact 3 and the protection static contact 4 are distributed at equal intervals on the left, middle and right sides. There are 4 static contacts of each type, which are arranged at equal intervals in the longitudinal direction. The number of bolts is the same as that of the static contacts. The copper sheets (501) of the moving and static contacts are made of beryllium bronze, and the spring clips (502) are made of spring steel clips.

[0066] The above-mentioned quick switching operating mechanism is a specific embodiment of the present application, which has reflected the substantial characteristics and progress of the present application. According to actual usage needs and under the inspiration of the present application, equivalent modifications in shape, structure, etc. can be made to it, which are all within the protection scope of this scheme.

[0067] It can be seen from the above technical scheme that the present application discloses a fast switching operating mechanism, including a base, a two-way switching knife switch and a knife switch connecting moving contact arranged on the base, a protection static contact and a short-circuit grounding static contact are arranged on both sides of the knife switch connecting moving contact on the base, the protection static contact is used to connect the protection secondary current circuit, and the knife switch connecting static contact is used to connect the short-circuit grounding circuit; the two-way switching knife switch is hinged with the knife switch connecting moving contact and can be rotated to both sides thereof to realize the electrical connection of the knife switch connecting moving contact with the protection static contact or the short-circuit grounding static contact respectively; the two-way switching knife switch is provided with a switching operating handle, and an interlocking lock is provided on the base, and the interlocking lock is used to lock the switching operating handle when the two-way switching knife switch is closed with the protection static contact or the short-circuit grounding static contact. The two-way switching knife switch can realize the fast switching operation of the connection mode of the secondary circuit of the current transformer, avoiding the problem of the existing bolt-type switching components taking a long time to switch the connection of the secondary circuit, thereby improving the operating efficiency.

[0068] Furthermore, the present application avoids the problem of poor safety caused by short electrical spacing in traditional bolt structures, and is easy to operate, has clear directions, and is fast, which effectively improves circuit switching efficiency and improves safety.

[0069] Through the interlocking lock structure, the two-way switching knife switch is effectively locked after closing with the protective static contact of the secondary current circuit, avoiding accidental contact or pulling that may cause false operation of the protection, thus effectively improving safety.

[0070] The female lock piece with a butterfly-shaped structure formed in one piece by stamping and bending is easy to manufacture, has high locking reliability and low cost.

[0071] The grounding static contact and the protective static contact adopt a three-stage finger-touch structure enhanced by a double spring clip, which can effectively achieve adaptive fitting and pressing on the six sides of the two-way switching knife switch, thereby maintaining effective electrical connection contact at all times.

[0072] The moving and static contacts and bolts on the base are integrally formed or welded, with a firm structure, which effectively prevents the connection bolts from rotating and loosening, and avoids the occurrence of electrical faults such as poor contact.

[0073] The two-way switching knife switch welds two flexible soft wires between the knife switch connecting static contacts above and below the rotating point, which can effectively improve the electrical conduction effect and avoid electrical conduction failures caused by poor contact due to long-term rotation of the intermediate rotating parts.

[0074] The bolts of the short-circuit grounding bolts are connected by a short-circuit conductive sheet, which can effectively prevent the grounding performance of individual bolts from being reduced or the grounding circuit from being broken, thereby improving the grounding conduction effect.

[0075] The arc-shaped cover structure can effectively isolate the internal moving and static contacts from each other electrically, preventing falling objects from causing short circuits. At the same time, the arc and the metal part of the switch are fully shielded and isolated, preventing the operator from accidentally touching the metal part caused by the switch during operation.

[0076] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0077] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0078] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0079] The technical solution provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A fast switching operating mechanism, characterized in that: It comprises a base, a two-way switching knife switch and a knife switch connecting moving contact arranged on the base, and a protection static contact and a short-circuit grounding static contact are arranged on both sides of the knife switch connecting moving contact on the base, the protection static contact is used to connect the protection secondary current loop, and the short-circuit grounding static contact is used to connect the short-circuit grounding loop; The bidirectional switching knife switch is hinged to the knife switch connecting moving contact and can rotate to both sides thereof to realize electrical connection of the knife switch connecting moving contact with the protection static contact or the short-circuit grounding static contact respectively; The bidirectional switching knife switch is provided with a switching operating handle, and an interlocking lock buckle is provided on the base, and the interlocking lock buckle is used to lock the switching operating handle when the bidirectional switching knife switch is closed with the protective static contact or the short-circuit grounding static contact; The interlocking buckle comprises a male buckle and a female locking piece, wherein: The male buckle is arranged on the switching operating handle; The female lock plate is a butterfly-shaped structure formed by stamping and bending, on which a transmission shaft hole is connected, a groove for installing a torsion spring, a buckle groove and an insulating guide strip inclined at an angle of 120 degrees to the female lock plate are provided. The female lock plate, the connecting shaft, the torsion spring and the U-shaped base are arranged on the base, and the female lock plate can be elastically bent by the torsion spring to move left and right. When the two-way switching knife switch is switched to contact with the protection static contact or the short-circuit grounding static contact for closing, the operating handle drives the male buckle to press downward to the insulating guide strip, and the torsion spring is pushed by the 120-degree angle guide to make the female lock plate move to one side. When the switching operating handle with the male buckle is in place, the female lock plate rebounds and locks the male buckle under the action of the torsion spring to lock the switching operating handle; the male buckle is a semicircular head columnar structure that is an extension of the switching operating handle, and is pressed against the buckle end face of the female lock plate as a guide and lock buckle; The two small wing parts at the lower end of the female lock plate are bent to form the groove, the groove and the U-shaped base are matched to form the transmission shaft hole, the groove, the torsion spring and the shaft are matched to form an interlocking mechanism that can be elastically reciprocated, and the buckle groove is formed at the lower end of the large wing part at the upper end of the female lock plate. The short part of the highest end of the female lock plate is bent into an angle of 120 degrees as a guide angle for matching the male buckle, and is inlaid with an insulating guide strip; The base is provided with a female lock plate base fixing groove for installing the female lock plate, and the U-shaped base is embedded in and fixed in the male lock head fixing groove on the base by bolts.

2. The fast switching operating mechanism according to claim 1, characterized in that: The short-circuit grounding static contact is connected to a short-circuit grounding bolt arranged below the base, and the short-circuit grounding bolt is used to connect the short-circuit grounding loop; The knife switch connecting moving contact is connected to the current transformer secondary circuit connection bolts arranged below the base, and the current transformer secondary circuit connection bolts are used to connect the current transformer secondary circuit; The protection static contact is connected to a protection secondary current circuit wiring bolt arranged below the base, and the protection secondary current circuit wiring bolt is used to connect the protection secondary current circuit.

3. The fast switching operating mechanism according to claim 1, characterized in that: The short-circuit grounding static contact and the protective static contact both comprise a copper sheet of a finger-contact structure, the copper sheet is formed by stamping and bending a single copper material, a spring sheet in contact with the closing of the two-way switching knife switch is arranged in the middle of the upper part of the copper sheet, and the bottom is connected to the base by an integrally formed bolt or a welded integrally formed bolt, two spring clips are inserted in the middle of the copper sheet, the two ends of the spring clips respectively abut against the upper and lower sides of the two outer sides of the spring sheet, and the two outer side surfaces of the spring clip abut against the inner side surfaces of the two outer walls of the copper sheet; The protection static contact or the short-circuit grounding static contact is embedded in the fixing groove of the base so that it will not shift forward and backward, and the spring clip is aligned with the spring leaf.

4. The fast switching operating mechanism according to claim 2, characterized in that: Two flexible connecting wires are welded on the left and right sides of the two-way switching knife switch, which is located above the rotating point and between the knife switch connecting moving contacts.

5. The fast switching operating mechanism according to claim 4, characterized in that: The short-circuit grounding bolt and the short-circuit grounding static contact, the current transformer secondary circuit connection bolt and the knife switch connecting moving contact, and the protection secondary current circuit connection bolt and the protection static contact are all integrally formed or directly welded bolts.

6. The fast switching operating mechanism according to claim 4, characterized in that: The bolts of the short-circuit grounding bolts are connected via a short-circuit conductive sheet.

7. The fast switching operating mechanism according to claim 1, characterized in that: An arc cover is arranged on the base, wherein: The arc cover is provided with a transverse electrical isolation chamber and a longitudinal electrical isolation chamber, and is provided with a closing stop notch and a positioning edge that matches the positioning notch of the cover.

8. The fast switching operating mechanism according to claim 2, characterized in that: The base is provided with a stationary contact fixing groove, and a bolt through hole is provided in the middle of the stationary contact fixing groove; The protection secondary current circuit connection bolt passes through the bolt hole of the protection static contact and the bolt through hole on the base from top to bottom, and then is tightened and fixed by a nut on the reverse side of the base; The short-circuit grounding bolt passes through the bolt hole of the protective static contact and the bolt through hole of the base from top to bottom, and then is tightened and fixed on the reverse side of the base by a nut; The secondary circuit connection bolts are passed from top to bottom through the bolt holes of the knife switch connecting the moving contacts and the bolt through holes of the base, and then are tightened and fixed by nuts on the reverse side of the base.

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