Coil mounting structure of direct-current load switch and direct-current load switch

Abstract

The utility model discloses a DC load switch coil installation structure and a DC load switch, the installation structure comprises an installation plate, a coil, a moving plate, a moving plate tension spring and an opening half shaft tension spring, the installation plate comprises a side plate and a bottom plate, the coil is installed on the bottom plate of the installation plate through a coil fixing structure, the bottom plate is provided with an iron core extending hole, and the moving plate tension spring is arranged in the iron core extending hole. An iron core of the coil downwards extends out of the iron core extending-out hole, the moving plate is hung below the bottom plate of the mounting plate in a balanced mode through a plurality of moving plate tension springs, the iron core of the coil abuts against the upper surface of the moving plate through an iron core guide structure, and the upper portion of the moving plate is further connected with a vertically-installed opening half-shaft tension spring. The opening half shaft tension spring is hung on the opening half shaft through the tension spring guide structure and moves in the vertical direction, the installation structure is installed on the base located on the left side of the operating mechanism, the problem that an arc extinguish chamber occupies the coil installation space in the prior art is solved through the scheme, and the technical effects of simplifying the structure and reasonably utilizing the space are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of DC electrical equipment, in particular to a coil installation structure of a DC load switch and a DC load switch. Background Art

[0002] DC load switches are increasingly widely used in the new energy industry. Two-pole products can not only meet application requirements, but also have the advantages of small size and low cost. In the traditional AC-DC switch structure, three coils, namely a shunt trip coil, a closing coil, and an under-voltage release coil, are installed on the operating mechanism cover plate. The controller is installed on the left side of the operating mechanism, and the arc extinguishing chamber is installed above the contact. However, the DC load switch does not have a controller, and it requires an arc extinguishing chamber with a large number of grid plates and a large volume for arc extinguishing. Some of the shunt trip coils and under-voltage release coils of the DC load switch were originally installed near the inner side of the base, and the switch is tripped by triggering the tripping half shaft. The closing coil is installed near the outer side cover, and the switch is closed by triggering the closing half shaft. Through experimental experience, it can be known that after the arc enters the arc extinguishing chamber, in addition to the middle grid plates playing a role, the grid plates in the front area will also play an arc extinguishing role. Therefore, the overall space of the arc extinguishing chamber moves forward, occupying the installation space of the coil. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the utility model provides a coil installation structure of a DC load switch and a DC load switch using this structure to solve the problem that the arc extinguishing chamber of the prior art occupies the coil installation space.

[0004] To achieve the above objectives, the utility model is realized through the following technical solutions:

[0005] A coil installation structure of a DC load switch includes a mounting plate, a coil, a moving plate, a moving plate tension spring, a coil fixing structure, a shunt trip half shaft tension spring, an iron core guiding structure, and a tension spring guiding structure. The mounting plate includes a side plate and a bottom plate. The coil is installed on the bottom plate of the mounting plate through the coil fixing structure. A core extension hole is provided on the bottom plate. The iron core of the coil extends downward through the core extension hole. The moving plate is suspended below the bottom plate of the mounting plate by a plurality of moving plate tension springs in a balanced manner. The iron core of the coil abuts against the upper surface of the moving plate through the iron core guiding structure. A vertically installed shunt trip half shaft tension spring is also connected above the moving plate. The shunt trip half shaft tension spring moves in the vertical direction through the tension spring guiding structure.

[0006] Preferably, the coil includes an under-voltage coil and a shunt trip coil.

[0007] Preferably, the coil fixing structure includes a coil fixing plate and a coil fixing plate mounting shaft. The coil fixing plate mounting shaft is vertically mounted on the mounting plate and has a screw hole at the top. The coil fixing plate is provided with screw through holes. The coil fixing plate is fixed to the screw hole at the top of the coil fixing plate mounting shaft by screws passing through the screw through holes, and the coil is pressed and fixed.

[0008] Preferably, screw mounting holes are formed on the side plate of the mounting plate.

[0009] Preferably, the tension spring guiding structure uses a tension spring guiding cylinder, and the inner diameter of the tension spring guiding cylinder is larger than the outer diameter of the closing half shaft tension spring.

[0010] Preferably, the iron core guiding structure uses an iron core guiding cylinder. The inner diameter of the iron core guiding cylinder is larger than the outer diameter of the iron core of the coil, and it is vertically mounted and fixed on the moving plate, and its position corresponds to the iron core protruding hole.

[0011] Preferably, a plurality of mounting plate tension spring grooves are provided on the bottom plate of the mounting plate. The moving plate is also provided with moving plate tension spring grooves at positions corresponding to the mounting plate tension spring grooves. Each moving plate tension spring is installed between the bottom plate of the mounting plate and the moving plate using each pair of corresponding mounting plate tension spring grooves and moving plate tension spring grooves.

[0012] Preferably, a closing half shaft tension spring groove is further provided on the moving plate. A closing half shaft tension spring hole is provided on the mounting plate at a position corresponding to the closing half shaft tension spring groove. The tension spring guiding cylinder is installed in the closing half shaft tension spring hole.

[0013] Based on the same inventive concept, the present application also discloses a DC load switch, including a base, a closing coil, an arc extinguishing chamber, an operating mechanism, and a storage motor. The base is installed at the bottom, the arc extinguishing chamber is installed at the top, the operating mechanism is installed at the front and includes an operating mechanism cover plate on its own top. It further includes the aforementioned DC load switch coil installation structure. The DC load switch coil installation structure is installed in the space on the left side of the operating mechanism and is installed and fixed on the base through the side plate of the mounting plate. The operating mechanism includes a closing half shaft, and the closing half shaft horizontally extends from the left side of the operating mechanism. The top end of the closing half shaft tension spring of the DC load switch coil installation structure is hung on the closing half shaft. The closing coil is installed on the operating mechanism cover plate on the top of the operating mechanism, and the storage motor is installed in the space on the right side of the operating mechanism.

[0014] Preferably, using the aforementioned DC load switch coil installation structure, the DC load switch coil installation structure is installed on the base by screws passing through the screw mounting holes on the side plate of the mounting plate.

[0015] A coil installation structure for a DC load switch proposed in this application simplifies the structure, rationally utilizes space, and has stable and reliable performance by installing undervoltage and shunt trip coils on the left side of the operating mechanism, that is, the space where the original controller was installed. Since the closing coil is installed far from the arc extinguishing chamber, it can be retained in its original position, and the installation positions of the shunt trip release and undervoltage release are transferred to the space on the left side of the operating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 6 is a front view schematic diagram of an embodiment of the DC load switch of this application;

[0017] Figure 2 FIG. 10 is a three-dimensional structure schematic diagram of an embodiment of the DC load switch of this application with the auxiliary switch hidden;

[0018] Figure 3 FIG. 14 is a three-dimensional exploded structure schematic diagram of an embodiment of the undervoltage coil and shunt trip coil module of this application;

[0019] Figure 4 FIG. 18 is a three-dimensional structure schematic diagram of an embodiment of the mounting plate and the coil fixing plate mounting shaft of this application;

[0020] Figure 5 FIG. 22 is a three-dimensional structure schematic diagram of an embodiment of the moving plate and the iron core guiding cylinder of this application;

[0021] Wherein, 1 - base, 2 - undervoltage coil and shunt trip coil module, 21 - mounting plate, 211 - mounting plate spring groove, 212 - closing half shaft spring hole, 213 - screw mounting hole, 214 - iron core extension hole, 22 - undervoltage coil, 23 - shunt trip coil, 24 - moving plate, 241 - moving plate spring groove, 242 - closing half shaft spring groove, 25 - moving plate spring, 26 - coil fixing plate, 27 - spring guiding cylinder, 28 - closing half shaft spring, 29 - coil fixing plate mounting shaft, 210 - iron core guiding cylinder, 3 - closing coil, 4 - arc extinguishing chamber, 5 - operating mechanism, 51 - operating mechanism cover plate, 52 - closing half shaft, 6 - auxiliary switch, 7 - energy storage motor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0023] This embodiment provides a technical solution: the installation structure of the DC load switch coil of the present utility model, which is the under-voltage coil and shunt trip coil module 2 in this embodiment, includes a mounting plate 21, a coil, a moving plate 24, a moving plate tension spring 25, a coil fixing structure, a tripping half-shaft tension spring 28, an iron core guiding structure, and a tension spring guiding structure. The mounting plate 21 includes a side plate and a bottom plate. In this embodiment, the mounting plate is L-shaped. The coil includes an under-voltage coil 22 and a shunt trip coil 23, both of which are installed on the bottom plate of the mounting plate 21 through the coil fixing structure. A core extension hole 214 is provided on the bottom plate. The iron core of the coil extends downward through the core extension hole 214. The moving plate 24 is balancedly suspended below the bottom plate of the mounting plate 21 by a plurality of moving plate tension springs 25. The iron core of the coil abuts against the upper surface of the moving plate 24 through the iron core guiding structure. A vertically installed tripping half-shaft tension spring 28 is also connected above the moving plate 24. The tripping half-shaft tension spring 28 moves in the vertical direction through the tension spring guiding structure.

[0024] The entire under-voltage coil and shunt trip coil module 2 is fixed on the base 1 through the coil mounting plate 21. Among them, the under-voltage coil 22 and the shunt trip coil 23 are fixed on the coil mounting plate 21 through the coil fixing plate 26. Four slots for hanging the moving plate tension springs 25 are provided on the moving plate 24. Three moving plate tension spring slots 241 located at three right angles respectively hang three moving plate tension springs 25. The other ends of the three moving plate tension springs 25 are hung on three mounting plate tension spring slots 211 on the three right-angle sides of the coil mounting plate 21. The fourth slot on the moving plate 24 is used to hang the tripping half-shaft tension spring 28, and the other end of the tripping half-shaft tension spring 28 is hung on the tripping half-shaft 52. The tension spring guiding cylinder 27 is sleeved on the tripping half-shaft tension spring 28 to play a guiding role. On the moving plate 24, directly below the two coils, two iron core guiding cylinders 210 are also provided for guiding the iron core. In this embodiment, both the iron core guiding structure and the tension spring guiding structure use cylindrical hollow sleeves, but other suitable structures such as guiding columns can also be used.

[0025] The coil mounting plate 21 is provided with three screw mounting holes 213, three mounting plate tension spring slots 211, two core extension holes 214, and a tripping half-shaft tension spring hole 212, and a coil fixing plate mounting shaft 29 is installed thereon. By means of the screw mounting holes 213, the coil mounting plate 21 is fixed on the base 1 through screws. The core extension holes 214 respectively give way to the iron cores of the shunt trip coil 23 and the under-voltage coil 22. The coil fixing plate mounting shaft 29 is used to install the coil fixing plate 26. The three mounting plate tension spring slots 211 are used to hang the three moving plate tension springs 25. The tripping half-shaft tension spring hole 212 is used to give way to the tripping half-shaft tension spring 28 hanging on the tripping half-shaft 52.

[0026] When the iron core of the under-voltage coil 22 or the shunt trip coil 23 extends, the iron core moves vertically downward, driving the moving plate 24 to move vertically downward. The closing half-shaft pulling spring 28 hanging on the moving plate 24 will be stretched, driving the closing half-shaft 52 to rotate, and the switch trips.

[0027] The moving plate 24 is provided with three moving plate spring grooves 241, one closing half-shaft spring groove 242, and two iron core guide cylinders 210 are installed on it. The three moving plate spring grooves 241 are used to hang three moving plate springs 25. The closing half-shaft spring groove 242 is used to hang the closing half-shaft pulling spring 28. The two iron core guide cylinders 210 are respectively used for guiding when the iron cores of the shunt trip coil 23 and the under-voltage coil 22 extend.

[0028] In this embodiment, both the moving plate spring 25 and the closing half-shaft pulling spring 28 use the hole-type structure to pull the relevant springs. Of course, the hook-type structure can also be used.

[0029] The under-voltage coil 22 and the shunt trip coil 23 are respectively fixed on the mounting plate 21, and the mounting plate 21 is fixed on the base 1 by screws. When the iron core of the under-voltage coil 22 or the shunt trip coil 23 extends, it will drive the closing half-shaft pulling spring 242 hanging on the closing half-shaft 52 to be stretched, driving the closing half-shaft 52 to rotate, and the switch trips.

[0030] Based on the same inventive concept, this application also discloses a DC load switch, which includes two arc extinguishing chambers 4, a base 1, an operating mechanism 5, an under-voltage coil and a shunt trip coil module 2, a closing coil 3, an auxiliary switch 6, a storage motor 7 and other components. The operating mechanism 5 is centrally arranged on the base 1, with the arc extinguishing chamber 4 above it. The closing coil 3 is fixed on the operating mechanism cover plate 51. The auxiliary switch 6 is assembled above the left side of the operating mechanism 5, the under-voltage coil and the shunt trip coil module 2 are assembled below it, and the storage motor 7 is assembled on the right side of the operating mechanism 5.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A DC load switch coil installation structure, characterized in that: The invention comprises a mounting plate (21), a coil, a moving plate (24), a moving plate tension spring (25), a coil fixing structure, a switch-off half-axis tension spring (28), an iron core guide structure, and a tension spring guide structure. The mounting plate (21) comprises a side plate and a bottom plate. The coil is mounted on the bottom plate of the mounting plate (21) via the coil fixing structure. The bottom plate is provided with an iron core extension hole (214). The iron core of the coil extends downwardly out of the iron core extension hole (214). The moving plate (24) is suspended in a balanced manner below the bottom plate of the mounting plate (21) via a plurality of moving plate tension springs (25). The iron core of the coil is pressed against the upper surface of the moving plate (24) via the iron core guide structure. A switch-off half-axis tension spring (28) installed vertically is also connected above the moving plate (24). The switch-off half-axis tension spring (28) moves in a vertical direction via the tension spring guide structure.

2. The DC load switch coil installation structure according to claim 1, characterized in that: The coil comprises an undervoltage coil (22) and a shunt coil (23).

3. The DC load switch coil installation structure according to claim 1, characterized in that: The coil fixing structure comprises a coil fixing plate (26) and a coil fixing plate mounting shaft (29); the coil fixing plate mounting shaft (29) is vertically mounted on the mounting plate (21) and is provided with a screw hole at the top; the coil fixing plate (26) is provided with a screw through hole; the coil fixing plate (26) is fixed to the screw hole at the top of the coil fixing plate mounting shaft (29) by screws passing through the screw through holes, and the coil is pressed and fixed.

4. The DC load switch coil installation structure according to claim 1, characterized in that: The side plate of the mounting plate (21) is provided with screw mounting holes (213).

5. The DC load switch coil installation structure according to claim 1, characterized in that: The tension spring guide structure uses a tension spring guide cylinder (27), and the inner diameter of the tension spring guide cylinder (27) is larger than the outer diameter of the opening half-shaft tension spring (28).

6. The DC load switch coil installation structure according to claim 1, characterized in that: The iron core guide structure uses an iron core guide cylinder (210), the inner diameter of the iron core guide cylinder (210) is larger than the outer diameter of the iron core of the coil and is vertically mounted and fixed on the moving plate (24) and its position corresponds to the iron core extension hole (214).

7. The DC load switch coil installation structure according to claim 1, characterized in that: A plurality of mounting plate tension spring grooves (211) are provided on the bottom plate of the mounting plate (21), and a moving plate tension spring groove (241) is also provided on the moving plate (24) at a position corresponding to the mounting plate tension spring groove (211). Each moving plate tension spring (25) is installed between the bottom plate of the mounting plate (21) and the moving plate (24) using a pair of corresponding mounting plate tension spring grooves (211) and moving plate tension spring grooves (241).

8. The DC load switch coil installation structure according to claim 5, characterized in that: The moving plate (24) is also provided with a switch-off half-shaft tension spring groove (242), the mounting plate (21) is provided with a switch-off half-shaft tension spring hole (212) at a position corresponding to the switch-off half-shaft tension spring groove (242), and the tension spring guide cylinder (27) is installed in the switch-off half-shaft tension spring hole (212).

9. A DC load switch, comprising a base (1), a closing coil (3), an arc extinguishing chamber (4), an operating mechanism (5), and an energy storage motor (7), wherein the base (1) is mounted at the bottom, the arc extinguishing chamber (4) is mounted at the top, and the operating mechanism (5) is mounted at the front and includes an operating mechanism cover plate (51) at the top thereof, characterized in that: It also includes a DC load switch coil mounting structure as claimed in any one of claims 1 to 8, wherein the DC load switch coil mounting structure is mounted in the space on the left side of the operating mechanism (5) and is fixed to the base (1) through the side plate of the mounting plate (21), the operating mechanism (5) includes a disconnecting half-shaft (52), the disconnecting half-shaft (52) extends horizontally from the left side of the operating mechanism (5), the top end of the disconnecting half-shaft tension spring (28) of the DC load switch coil mounting structure is hung on the disconnecting half-shaft (52), the closing coil (3) is mounted on the operating mechanism cover (51) at the top of the operating mechanism (5), and the energy storage motor (7) is mounted in the space on the right side of the operating mechanism (5).

10. The DC load switch according to claim 9, characterized in that: Using the DC load switch coil mounting structure as claimed in claim 4, the DC load switch coil mounting structure is mounted on the base (1) by using screws to pass through the screw mounting holes (213) on the side plate of the mounting plate (21).

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