A pole-mounted switch with a built-in disconnect switch

Abstract

The invention discloses a pole-mounted switch with a built-in isolating switch. A circuit breaker and an isolating switch are arranged in a shell, and an isolating operating mechanism and a circuit breaker operating mechanism are arranged at corresponding positions on the front of the shell; the main shaft of the isolating switch is connected with the isolating operating mechanism; the transmission part of the circuit breaker is connected with the circuit breaker operating mechanism; the upper part of the interlocking plate is hinged with the circuit breaker mechanism main shaft of the circuit breaker operating mechanism through a crank arm; the lower limit of the interlocking plate is installed in the limit sliding groove of the isolating operating mechanism, and under the rotation of the circuit breaker mechanism main shaft of the circuit breaker operating mechanism, the interlocking plate can move in the direction of the limit sliding groove; the isolating mechanism main shaft is fixedly connected with an isolating boss, and the lower part of the interlocking plate is correspondingly provided with a boss matched with the isolating boss; when the circuit breaker is in a closed state, the boss at the lower end of the interlocking plate contacts with the isolating boss, and the rotation of the isolating mechanism main shaft is limited, so that the isolating operating mechanism is locked and the isolating switch cannot be rotated.

Description

Technical Field

[0001] The invention belongs to the technical field of outdoor overhead power distribution lines, and in particular relates to a pole-mounted switch with a built-in isolating switch. Background Art

[0002] The most widely used vacuum circuit breakers at present are ZW20 and ZW32 switches, which are equipped with external isolating switches. In outdoor environments, external isolating switches are prone to material corrosion, poor contact, and improper separation and closing operations, which pose serious safety hazards to power operation.

[0003] To make up for this defect, it is proposed to place the isolating knife switch inside the circuit breaker box. The stable relative environment is conducive to the smooth operation of the switch. However, some existing solutions have defects such as large volume, low assembly consistency, large sealing volume and difficulty in subsequent pollution degradation. Summary of the invention

[0004] Purpose: In order to overcome the deficiencies in the prior art, the present invention provides a pole-mounted switch with a built-in isolating switch.

[0005] Technical solution: To solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A pole-mounted switch with a built-in isolating switch, comprising a housing, a circuit breaker, an isolating switch, a circuit breaker operating mechanism, an isolating operating mechanism, and an interlocking plate;

[0007] A circuit breaker and a disconnector are installed in the housing, and the circuit breaker and the disconnector are arranged up and down to form an upper circuit breaker and lower disconnector structure; an isolation operating mechanism and a circuit breaker operating mechanism are installed at corresponding positions on the front of the housing;

[0008] The isolating main shaft of the isolating switch is connected to the isolating mechanism main shaft of the isolating operating mechanism, and the opening and closing of the isolating switch is realized by operating the isolating operating mechanism;

[0009] The transmission part of the circuit breaker is connected to the circuit breaker mechanism main shaft of the circuit breaker operating mechanism, and the vacuum interrupter in the circuit breaker is opened and closed by operating the circuit breaker operating mechanism; the transmission part includes a transmission main shaft;

[0010] The upper part of the interlocking plate is hinged to the main shaft of the circuit breaker mechanism of the circuit breaker operating mechanism through a crank arm; the lower part of the interlocking plate is limitedly installed in the limit sliding groove of the isolation operating mechanism, and the interlocking plate can move along the direction of the limit sliding groove when the main shaft of the circuit breaker mechanism of the circuit breaker operating mechanism rotates;

[0011] In the isolation operating mechanism, an isolation boss is fixedly connected to the main shaft of the isolation mechanism, and a protrusion matching the isolation boss is correspondingly provided at the lower part of the interlocking plate;

[0012] When the circuit breaker is in the closed state, the protrusion at the lower end of the interlocking plate contacts the isolation boss, limiting the rotation of the main shaft of the isolation mechanism, so that the isolation operating mechanism is locked and the isolation switch cannot be rotated.

[0013] In some embodiments, the isolating switch includes an isolating spindle, a moving knife plate, an isolating pressure spring, a fixed connection copper bar, an insulating fixing seat, a bracket, and a static contact electrically connected to the isolating overlapping copper bar of the circuit breaker;

[0014] The two ends of the insulating fixing seat are respectively fixed in the shell through brackets, and the fixed connecting copper bar is fixed in the insulating fixing seat;

[0015] Both ends of the isolation main shaft are rotatably mounted on the bracket, the movable knife plate is fixedly mounted in the isolation main shaft, and the lower end of the movable knife plate is movably connected to the fixed connection copper bar;

[0016] The movable knife plate is provided with an isolation pressure spring at the connection with the isolation spindle and the fixed connection copper bar; the isolation spindle is connected to the isolation operating mechanism through a connecting piece;

[0017] Under the active force of the isolation operating mechanism, the rotation of the isolation main shaft drives the moving knife plate to rotate, so that the upper end of the moving knife plate is disconnected or connected with the static contact, thereby realizing the opening and closing of the isolation switch.

[0018] In some embodiments, the circuit breaker includes a transmission main shaft, a switching chute plate, a vacuum interrupter, a static end lap copper bar, a flexible connection, an isolation lap copper bar, and a circuit breaker pressure spring;

[0019] The transmission main shaft is fixedly connected with a switch-on and switch-off slide plate.

[0020] The outer end of the static conductive rod of the vacuum interrupter is fixedly connected to the static end lap copper bar; the outer end of the dynamic conductive rod of the vacuum interrupter is connected to the isolation lap copper bar through a flexible connection; the flexible connection is provided with a circuit breaker pressure spring, and the connecting end of the circuit breaker pressure spring is provided with a roller, which is slidably connected and installed in the arc-shaped slide slot of the opening and closing slide slot plate;

[0021] Under the active force of the circuit breaker operating mechanism, the transmission main shaft drives the opening and closing slide plate to rotate, and the roller of the circuit breaker pressure spring slides relatively in the arc-shaped slide groove of the opening and closing slide plate to realize the opening and closing of the circuit breaker.

[0022] Further, in some embodiments, the circuit breaker further comprises a fixing seat, the fixing seat is fixedly mounted on the insulating frame, the fixing seat is provided with a mounting hole for penetrating the transmission main shaft and a limiting groove matched with the end of the circuit breaker pressure spring; the transmission main shaft is penetrated in the mounting hole of the fixing seat, the end of the circuit breaker pressure spring is slidably mounted in the limiting groove, and the end of the circuit breaker pressure spring can be telescopically moved along the direction of the limiting groove;

[0023] The lower platform of the fixing seat is provided with a threaded hole for connecting and installing the isolation overlapping copper busbar and the static contact.

[0024] Furthermore, in some embodiments, the fixing seat is made of hard aluminum 112 and is formed by three-dimensional CNC machining or injection molding; a circular ring notch is provided at the lower end of the fixing seat to provide movement space for the soft connection during the opening and closing process.

[0025] Furthermore, in some embodiments, the circuit breaker further includes a mounting plate, the transmission main shaft is movably mounted in the mounting plate, and the vacuum interrupter is mounted on the mounting plate via an insulating frame.

[0026] Furthermore, in some embodiments, the arc-shaped slideway of the opening and closing slideway plate is composed of a plurality of arc segments connected together, which sequentially include curve 1, curve 2, curve 3 and curve 4;

[0027] Curve 4 is an arc with its center at the rotation center of the opening and closing slide plate. When the roller is at any position on curve 4, the overtravel remains unchanged and the circuit breaker is in the closed position. The angle of curve 4 is greater than 10 degrees.

[0028] When the opening and closing chute plate rotates 90°, the roller stays on curve 1, and the circuit breaker is in the open position. Curve 1 is an arc with its center at the rotation center of the opening and closing chute plate. The opening distance of the roller remains unchanged at any position on curve 1. The angle of curve 1 is greater than 10 degrees. The radius of curve 4 minus the radius of curve 1 is equal to the overtravel plus the opening distance. Curve 2 and curve 3 are transition curves. Curve 2 is tangent to curve 1, and curve 3 is tangent to curve 4. The slope of the process from curve 3 to curve 2 gradually decreases, and the movement process is smooth without convex points. After the opening and closing process, the roller is in place to meet the travel characteristics required by the switch.

[0029] In some embodiments, the pole-mounted switch with a built-in isolating switch further includes an explosion-proof component, a pressure relief channel is provided on the rear wall of the shell, and the explosion-proof component covers the pressure relief channel.

[0030] In some embodiments, for the pole-mounted switch with built-in isolating switch, the static end lap copper bar of the circuit breaker and the fixed connection copper bar of the isolating switch are respectively connected to the external cable through the casing through the casing, and the casing is used for insulation and sealing.

[0031] In some embodiments, the pole-mounted switch with a built-in isolating switch further includes a current transformer, which is fixed on the base of the housing. The static end of the circuit breaker is connected to the copper busbar through the current transformer and installed and connected to the bushing. The current transformer is used to monitor the current online.

[0032] The static end copper busbar of the circuit breaker is electrically connected to the three-phase A, B and C through bushings respectively; the voltage sensor is connected to the static end copper busbar of the circuit breaker for online monitoring of the three-phase voltage.

[0033] A barometer is also provided at the bottom of the shell for real-time observation of the gas pressure value inside the shell.

[0034] Beneficial effects: The pole-mounted switch with a built-in isolating switch provided by the present invention has the following advantages: (1) In the pole-mounted switch with a built-in isolating switch provided by the present invention, except for the lapped bushing, all other conductors are sealed in the housing, with a high protection level and safe and reliable operation;

[0035] (2) The present invention provides a pole-mounted switch with a built-in isolating switch, in which the box can be filled with pollution-free, high-insulation, environmentally friendly gas to replace the existing SF6 gas;

[0036] (3) The present invention provides a pole-mounted switch with a built-in isolating switch, in which both the isolating switch and the circuit breaker are modularly designed, with high consistent performance, good synchronization and interchangeability, and is economical and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is an internal structure diagram of the circuit breaker and the isolating switch in the closed state in the embodiment of the present invention.

[0038] Figure 2 It is an internal structure diagram of the circuit breaker and the isolating switch in the open state in the embodiment of the present invention.

[0039] Figure 3 It is a top view of the circuit breaker and the disconnector in the closed state according to the embodiment of the present invention.

[0040] Figure 4 It is a front view of the circuit breaker in the closed state in the embodiment of the present invention.

[0041] Figure 5 It is a top view of the circuit breaker in the closed state according to the embodiment of the present invention.

[0042] Figure 6 It is the relative position and motion curve of the roller when the circuit breaker is in the closed state in the embodiment of the present invention.

[0043] Figure 7 It is the relative position and motion curve of the roller when the circuit breaker is in the open state in the embodiment of the present invention.

[0044] Figure 8 It is a diagram of the interlocking position of the mechanism when the circuit breaker group is in the open state and the disconnector is in the closed state in the embodiment of the present invention.

[0045] Fig. 9 It is a diagram of the interlocking position of the mechanism when the circuit breaker group and the isolating switch are in the closed state in an embodiment of the present invention.

[0046] Fig.10 This is a schematic diagram of the interlocking position of the mechanism in the embodiment of the present invention;

[0047] Fig.11 is a front view of an isolating switch in an embodiment of the present invention;

[0048] Fig.12 is a side sectional view of an isolating switch according to an embodiment of the present invention;

[0049] Fig.13 is a front view of a fixing seat in an embodiment of the present invention;

[0050] Fig.14 1 is a top view of the fixing seat in the embodiment of the present invention.

[0051] In the figure: housing (1), circuit breaker (2), transmission main shaft (201), opening and closing slide plate (202), vacuum interrupter (203), static end lap copper bar (204), flexible connection (205), isolation lap copper bar (206), circuit breaker pressure spring (207), mounting plate (208), insulating frame (209), fixing seat (210), roller (211), arc slide (212), mounting hole (213), limit groove (214), circular ring notch ( 215); isolating switch (3), isolating spindle (301), moving knife plate (302), isolating pressure spring (303), fixed connecting copper bar (304), insulating fixing seat (305), bracket (306), static contact (307); circuit breaker operating mechanism (4), circuit breaker mechanism spindle (401), isolating operating mechanism (5), isolating mechanism spindle (501), limiting slide groove (502), interlocking plate (6), protrusion (601), isolating boss (602), explosion-proof component (7), bushing (8), current transformer (9), voltage sensor (10), barometer (11), hanger (12), lifting handle (13). DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may also include different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0054] Example 1

[0055] like Figure 1 , Figure 2 , Figure 3 As shown, a pole-mounted switch with a built-in isolating switch comprises a housing (1), a circuit breaker (2), an isolating switch (3), a circuit breaker operating mechanism (4), an isolating operating mechanism (5), and an interlocking plate (6);

[0056] A circuit breaker (2) and an isolating switch (3) are installed in the housing (1), and the circuit breaker (2) and the isolating switch (3) are arranged up and down to form an upper circuit breaker and lower isolating structure; an isolating operating mechanism (5) and a circuit breaker operating mechanism (4) are installed at corresponding positions on the front of the housing (1);

[0057] The isolating main shaft (301) of the isolating switch (3) is connected to the isolating mechanism main shaft (501) of the isolating operating mechanism (5), and the isolating switch (3) is opened and closed by operating the isolating operating mechanism;

[0058] The transmission part of the circuit breaker (2) is connected to the circuit breaker mechanism main shaft (401) of the circuit breaker operating mechanism (4), and the vacuum interrupter in the circuit breaker is opened and closed by operating the circuit breaker operating mechanism, that is, the circuit breaker (2) is opened and closed; the transmission part comprises a transmission main shaft (201);

[0059] The upper part of the interlocking plate (6) is hinged to the circuit breaker mechanism main shaft (401) of the circuit breaker operating mechanism (4) via a crank arm; the lower part of the interlocking plate (6) is limitedly installed in the limit sliding groove (502) of the isolation operating mechanism (5), and when the circuit breaker mechanism main shaft (401) of the circuit breaker operating mechanism (4) rotates, the interlocking plate (6) can move in the direction along the limit sliding groove (502);

[0060] In the isolation operating mechanism (5), an isolation boss (602) is fixedly connected to the isolation mechanism main shaft (501), and a protrusion (601) matching the isolation boss (602) is correspondingly provided at the lower part of the interlocking plate (6);

[0061] When the circuit breaker (2) is in a closed state, the protrusion (601) at the lower end of the interlocking plate (6) contacts the isolation boss (602), limiting the rotation of the isolation mechanism main shaft (501), so that the isolation operating mechanism (5) is locked and the isolation switch cannot be rotated.

[0062] In some embodiments, the circuit breaker operating mechanism (4) and the isolation operating mechanism (5) are fixedly mounted on the outside of the housing (1) by means of bolts and are sealed by means of a mechanism cover. The circuit breaker operating mechanism (4) and the isolation operating mechanism (5) are provided with an interlocking plate (6), and a locking function is achieved by the relative position of the interlocking plate.

[0063] like Fig.11 , Fig.12 As shown, the isolating switch (3) comprises an isolating main shaft (301), a moving knife plate (302), an isolating pressure spring (303), a fixed connection copper bar (304), an insulating fixing seat (305), a bracket (306), and a static contact (307) electrically connected to the isolating overlapping copper bar of the circuit breaker (2);

[0064] The two ends of the insulating fixing seat (305) are respectively fixed in the housing (1) via brackets (306); the fixed connecting copper bar (304) is fixed in the insulating fixing seat (305), one end of which is connected to the moving knife plate (302) and the other end of which extends to the sleeve (8);

[0065] The two ends of the isolation main shaft (301) are rotatably mounted on the bracket (306); the movable knife plate (302) is fixedly mounted in the isolation main shaft (301); and the lower end of the movable knife plate (302) is movably connected to the fixed connection copper bar (304);

[0066] An isolation pressure spring (303) is provided at the connection between the movable knife plate (302), the isolation main shaft (301) and the fixed connection copper bar (304). The isolation pressure spring (303) is compressed to a certain length to provide necessary contact pressure. The isolation main shaft (301) is connected to the isolation operating mechanism via a connecting piece.

[0067] Under the active force of the isolating operating mechanism (5), the isolating main shaft (301) rotates to drive the moving knife plate (302) to rotate, so that the upper end of the moving knife plate (302) and the static contact (307) are disconnected or connected, thereby realizing the opening and closing of the isolating switch.

[0068] like Figure 4 , Figure 5 As shown, the circuit breaker (2) comprises a transmission main shaft (201), a switching chute plate (202), a vacuum interrupter (203), a static end lap copper bar (204), a flexible connection (205), an isolation lap copper bar (206), and a circuit breaker pressure spring (207);

[0069] A switch-on and switch-off slide plate (202) is fixedly connected to the transmission main shaft (201).

[0070] The outer end of the static conductive rod of the vacuum interrupter (203) is fixedly connected to the static end overlapping copper bar (204); the outer end of the dynamic conductive rod of the vacuum interrupter (203) is connected to the isolation overlapping copper bar (206) through a flexible connection (205); the flexible connection (205) is provided with a circuit breaker pressure spring (207), and the connection end of the circuit breaker pressure spring (207) is provided with a roller (211), and the roller (211) is slidably connected and installed in the arc-shaped slide groove (212) of the opening and closing slide groove plate (202);

[0071] Under the active force of the circuit breaker operating mechanism (4), the transmission main shaft (201) drives the opening and closing slide plate (202) to rotate, and the roller (211) of the circuit breaker pressure spring (207) slides relatively in the arc-shaped slide groove (212) of the opening and closing slide plate (202), thereby realizing the opening and closing of the circuit breaker (2).

[0072] In some embodiments, the circuit breaker (2) further comprises a fixing seat (210), wherein the fixing seat (210) is fixedly mounted on the insulating frame (209). Fig.13 , Figure 4As shown, the fixing seat (210) is provided with a mounting hole (213) for inserting the transmission main shaft (201) and a limiting groove (214) matched with the end of the circuit breaker pressure spring (207); the transmission main shaft (201) is inserted into the mounting hole (213) of the fixing seat (210), the end of the circuit breaker pressure spring (207) is slidably installed in the limiting groove (214), and the end of the circuit breaker pressure spring (207) can be telescopically moved along the direction of the limiting groove (214); the lower end platform of the fixing seat (210) is provided with a threaded hole for connecting and installing the isolation overlap copper bar (206) and the static contact (307).

[0073] The fixing seat (210) is made of hard aluminum 112, formed by three-dimensional numerical control processing or injection molding, has no sharp edges and corners and is mostly designed as an arc to reduce internal stress. A circular ring notch (215) is provided at the lower end of the fixing seat (210) to provide a movement space for the soft connection during the opening and closing process.

[0074] The circuit breaker (2) and the isolating switch (3) are an integrated assembly structure with a modular design. After the external assembly is completed, the entire structure is installed in a housing. The cost is lower than that of a sealed type and the characteristics are more stable than those of a single-phase assembly type. The movable blade plate (302) of the isolating switch (3) is in contact with and cooperates with the isolating lap copper bar (206). The relative position of the isolating switch (3) and the isolating lap copper bar (206) is adjusted as a whole to achieve the same characteristics of the three phases of the product.

[0075] like Figure 6 As shown, when the circuit breaker (2) is in the closed position, the roller (211) finally stops at a position on curve 4. Curve 4 is an arc with its center at the rotation center of the split-and-close chute plate. The overtravel of the roller (211) remains unchanged at any position on curve 4. Due to closing overshoot and other reasons, the angle of curve 4 must be greater than 10 degrees for adjustment. When the split-and-close chute plate rotates 90°, as shown in FIG. Figure 7 As shown, when the circuit breaker is in the open position, the position where the roller (211) finally stops is on curve 1. Curve 1 is an arc with its center at the rotation center of the opening and closing slide plate. The opening distance of the roller (211) remains unchanged at any position on curve 1. Due to reasons such as opening buffer, the angle of curve 1 must be greater than 10 degrees for adjustment. The radius of curve 4 minus the radius of curve 1 is equal to the overtravel plus the opening distance. Curve 2 and curve 3 are transition curves, which are tangent to curve 1 and curve 4 respectively. The slope of the process from curve 3 to curve 2 gradually decreases, and the movement process is smooth without convex points. After the opening and closing process, the roller (211) is in place to meet the travel characteristics required by the switch.

[0076] In some embodiments, the circuit breaker (2) further comprises a mounting plate (208), the transmission main shaft (201) is movably mounted in the mounting plate (208), and the vacuum interrupter (203) is mounted on the mounting plate (208) via an insulating frame (209).

[0077] In some embodiments, the arc-shaped slide slot (212) of the opening and closing slide slot plate (202) is composed of a plurality of arc segments connected together; the arc segments sequentially include curve 1, curve 2, curve 3 and curve 4;

[0078] Curve 4 is an arc with its center at the rotation center of the opening and closing slide plate. When the roller (211) is at any position on curve 4, the overtravel remains unchanged and the circuit breaker is in the closed position. The angle of curve 4 is greater than 10 degrees.

[0079] When the opening and closing chute plate rotates 90 degrees, the position where the roller (211) stays is on curve 1, and the circuit breaker is in the opening position. Curve 1 is an arc with its center at the rotation center of the opening and closing chute plate. The opening distance of the roller (211) remains unchanged at any position on curve 1. The angle of curve 1 is greater than 10 degrees. The radius of curve 4 minus the radius of curve 1 is equal to the overtravel plus the opening distance. Curve 2 and curve 3 are transition curves. Curve 2 is tangent to curve 1, and curve 3 is tangent to curve 4. The slope of the process from curve 3 to curve 2 gradually decreases. The movement process is smooth without convex points. After the opening and closing process, the roller (211) is in place to meet the travel characteristics required by the switch.

[0080] In some embodiments, the pole-mounted switch with a built-in isolating switch further comprises an explosion-proof component (7), a pressure relief channel is provided on the rear wall of the housing (1), and the explosion-proof component (7) covers the pressure relief channel, and is used to form a pressure relief channel through the explosion-proof component (7) when the air pressure increases due to an internal fault, thereby ensuring personal safety.

[0081] In some embodiments, the static end lap copper busbar (204) of the circuit breaker (2) and the fixed connection copper busbar (304) of the disconnector (3) are respectively passed through the casing (1) through the bushing (8) to be connected to the external cable, and the bushing (8) is used for insulation and sealing.

[0082] In some embodiments, the pole-mounted switch with a built-in isolating switch further comprises a current transformer (9), the current transformer (9) being fixed on the base of the housing (1), the static end of the circuit breaker (2) being connected to the copper bar (204) passing through the current transformer (9) and being installed and connected to the bushing (8), and the current transformer (9) being used for online current monitoring.

[0083] The static end copper busbar (204) of the circuit breaker (2) is electrically connected to the three phases A, B and C respectively through bushings (8); the voltage sensor (10) is connected to the static end copper busbar (204) of the circuit breaker (2) for online monitoring of the three-phase voltage.

[0084] In some embodiments, a pressure gauge (11) is also provided at the bottom of the shell (1) for observing the gas pressure value inside the shell (1) in real time.

[0085] In some embodiments, the pole-mounted switch with a built-in isolating switch further comprises a hanger (12) for lifting and connecting, and the hanger (12) is arranged on the top end of the housing (1).

[0086] In some embodiments, the pole-mounted switch with a built-in isolating switch further comprises a lifting handle (13), wherein the lifting handle (13) is fixed on the left and right sides of the housing (1) for easy transportation.

[0087] like Figure 8 As shown, the circuit breaker is in the open state and the isolating switch is in the closed state; at this time, the interlocking plate (6) moves to the lowest position, and the protrusion (601) of the interlocking plate (6) is no longer effective against the isolating boss (602). At this time, the isolating switch can be operated to rotate 90° clockwise from closed to open. Similarly, the isolating switch can be operated to rotate 90° counterclockwise from open to closed.

[0088] Fig.10 The schematic diagram of the interlocking position of the mechanism in the embodiment of the present invention is shown. When the circuit breaker (2) is in the closed state, the protrusion (601) at the lower end of the interlocking plate (6) contacts the isolation boss (602), limiting the rotation of the main shaft of the isolation operating mechanism (12). At this time, the isolation operating mechanism (12) forms a locked state, and the isolation switch cannot be rotated any more.

[0089] like Fig. 9 As shown, the circuit breaker (2) and the isolating switch (3) are both in the closed state. At this time, the interlock plate (6) moves to the locked position, and the protrusion (601) of the interlock plate (6) contacts the isolating boss (602). At this time, the isolating operating mechanism (12) forms a locked state, and the isolating switch cannot be rotated. This interlocking system ensures that when the circuit breaker is in the closed position, the isolating switch in the closed state cannot be opened, and the isolating switch in the open state cannot be closed. The locking function of the interlock can effectively prevent the misoperation of the isolating switch, thereby ensuring personal safety.

[0090] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0091] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pole switch with a built-in isolating switch, characterized in that: The invention comprises a housing (1), a circuit breaker (2), a disconnector (3), a circuit breaker operating mechanism (4), an disconnector operating mechanism (5), and an interlocking plate (6); the housing (1) contains the circuit breaker (2) and the disconnector (3), the circuit breaker (2) and the disconnector (3) are arranged up and down, forming an upper circuit breaker and lower disconnector structure; the disconnector operating mechanism (5) and the circuit breaker operating mechanism (4) are installed at corresponding positions on the front of the housing (1); the disconnector main shaft (301) of the disconnector (3) is connected to the disconnector mechanism main shaft (501) of the disconnector operating mechanism (5), and the disconnector (3) is opened and closed by operating the disconnector operating mechanism; the transmission part of the circuit breaker (2) is connected to the circuit breaker mechanism main shaft (401) of the circuit breaker operating mechanism (4), and the vacuum interrupter in the circuit breaker is opened and closed by operating the circuit breaker operating mechanism, that is, the circuit breaker (2) is opened and closed; the transmission part comprises a transmission main shaft (201); the upper part of the interlocking plate (6) is hinged to the circuit breaker mechanism main shaft (401) of the circuit breaker operating mechanism (4) through a crank; the lower part of the interlocking plate (6) is limitedly installed in the limit sliding groove (502) of the isolation operating mechanism (5), and when the circuit breaker mechanism main shaft (401) of the circuit breaker operating mechanism (4) rotates, the interlocking plate (6) can move in the direction along the limit sliding groove (502); in the isolation operating mechanism (5), the isolation mechanism The main shaft (501) of the structure is fixedly connected with an isolation boss (602), and the lower part of the interlocking plate (6) is correspondingly provided with a protrusion (601) that matches the isolation boss (602); when the circuit breaker (2) is in a closed state, the protrusion (601) at the lower end of the interlocking plate (6) contacts the isolation boss (602), limiting the rotation of the main shaft (501) of the isolation mechanism, so that the isolation operating mechanism (5) forms a locked state, and the isolation switch cannot be rotated; The circuit breaker (2) comprises a transmission main shaft (201), a switching chute plate (202), a vacuum interrupter (203), a static end lap copper bar (204), a flexible connection (205), an isolation lap copper bar (206), and a circuit breaker pressure spring (207); the transmission main shaft (201) is fixedly connected with the switching chute plate (202); the outer end of the static conductive rod of the vacuum interrupter (203) is fixedly connected with the static end lap copper bar (204); the outer end of the dynamic conductive rod of the vacuum interrupter (203) is connected to the isolation lap copper bar (206) via the flexible connection (205); the flexible connection (205) is connected with a circuit breaker pressure spring (207), and a roller (211) is provided at the connection end of the circuit breaker pressure spring (207), and the roller (211) is slidably connected and installed in the arc-shaped slide groove (212) of the opening and closing slide groove plate (202); under the active force of the circuit breaker operating mechanism (4), the transmission main shaft (201) drives the opening and closing slide groove plate (202) to rotate, and the roller (211) of the circuit breaker pressure spring (207) slides relatively in the arc-shaped slide groove (212) of the opening and closing slide groove plate (202), thereby realizing the opening and closing of the circuit breaker (2); The circuit breaker (2) further comprises a fixing seat (210), the fixing seat (210) being fixedly mounted on the insulating frame (209), the fixing seat (210) being provided with a mounting hole (213) for inserting the transmission main shaft (201) and a limiting groove (214) matching the end of the circuit breaker pressure spring (207); the transmission main shaft (201) is inserted into the mounting hole (213) of the fixing seat (210), the end of the circuit breaker pressure spring (207) is slidably mounted in the limiting groove (214), and the end of the circuit breaker pressure spring (207) can be telescopically moved along the direction of the limiting groove (214); the lower end platform of the fixing seat (210) is provided with a threaded hole for connecting and installing the isolation overlap copper bar (206) and the static contact (307); It also comprises an explosion-proof component (7), a pressure relief channel is provided on the rear wall of the housing (1), and the explosion-proof component (7) covers the pressure relief channel.

2. The pole switch with built-in disconnector according to claim 1, characterized in that: The isolating switch (3) comprises an isolating main shaft (301), a moving knife plate (302), an isolating pressure spring (303), a fixed connection copper bar (304), an insulating fixing seat (305), a bracket (306), and a static contact (307) electrically connected to the isolating overlapping copper bar of the circuit breaker (2); Both ends of the insulating fixing seat (305) are respectively installed and fixed in the housing (1) through brackets (306), and the fixed connecting copper bar (304) is fixed in the insulating fixing seat (305); The two ends of the isolation main shaft (301) are rotatably mounted on the bracket (306); the movable knife plate (302) is fixedly mounted in the isolation main shaft (301); and the lower end of the movable knife plate (302) is movably connected to the fixed connection copper bar (304); An isolation pressure spring (303) is provided at the connection between the movable knife plate (302), the isolation main shaft (301) and the fixed connection copper bar (304); the isolation main shaft (301) is connected to the isolation operating mechanism via a connecting piece; Under the active force of the isolating operating mechanism (5), the isolating main shaft (301) rotates to drive the moving knife plate (302) to rotate, so that the upper end of the moving knife plate (302) and the static contact (307) are disconnected or connected, thereby realizing the opening and closing of the isolating switch.

3. The pole switch with built-in disconnector according to claim 1, characterized in that: The fixing seat (210) is made of hard aluminum 112 and is formed by three-dimensional numerical control processing or injection molding.

4. The pole switch with built-in disconnector according to claim 1, characterized in that: A circular notch (215) is provided at the lower end of the fixing seat (210) for providing movement space for the soft connection during the opening and closing process.

5. The pole switch with built-in disconnector according to claim 1, characterized in that: The circuit breaker (2) further comprises a mounting plate (208), the transmission main shaft (201) being movably mounted in the mounting plate (208), and the vacuum interrupter (203) being mounted on the mounting plate (208) via an insulating frame (209).

6. The pole switch with built-in disconnector according to claim 1, characterized in that: The arc-shaped slide groove (212) of the opening and closing slide groove plate (202) is composed of a plurality of arc segments connected together, and includes curve 1, curve 2, curve 3 and curve 4 in sequence; Curve 4 is an arc whose center is at the rotation center of the opening and closing slide plate (202). When the roller (211) is at any position on curve 4, the overtravel remains unchanged and the circuit breaker is in the closed position. The angle of curve 4 is greater than 10 degrees. When the opening and closing chute plate (202) rotates 90 degrees, the roller (211) stays on curve 1, and the circuit breaker is in the opening position. Curve 1 is an arc with its center at the rotation center of the opening and closing chute plate. The opening distance of the roller (211) remains unchanged at any position on curve 1. The angle of curve 1 is greater than 10 degrees. The radius of curve 4 minus the radius of curve 1 is equal to the overtravel plus the opening distance. Curve 2 and curve 3 are transition curves. Curve 2 is tangent to curve 1, and curve 3 is tangent to curve 4. The slope of the process from curve 3 to curve 2 gradually decreases. The movement process is smooth without convex points. After the opening and closing process, the roller (211) is in place to meet the travel characteristics required by the switch.

7. The pole switch with built-in disconnector according to claim 2, characterized in that: The fixed connection copper bars (304) of the disconnector (3) are respectively passed through bushings (8) to pass out of the housing (1) and are connected to external cables. The bushings (8) are used for insulation and sealing.

8. The pole switch with built-in disconnector according to claim 1, characterized in that: It also includes a current transformer (9), which is fixed on the base of the housing (1). The static end of the circuit breaker (2) is connected to a copper bar (204) passing through the current transformer (9) and is installed and connected to the bushing (8). The current transformer (9) is used for online current monitoring.

9. The pole switch with built-in disconnector according to claim 1, characterized in that: The static end copper busbar (204) of the circuit breaker (2) is electrically connected to the three phases A, B and C respectively through bushings (8); the voltage sensor (10) is connected to the static end copper busbar (204) of the circuit breaker (2) for online monitoring of the three-phase voltage.

10. The pole switch with built-in disconnector according to claim 1, characterized in that: A barometer (11) is also provided at the bottom of the shell (1) for observing the gas pressure value inside the shell (1) in real time.

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