Magnetic control mechanism

Abstract

The utility model relates to the technical field of magnetic control switches, in particular to a magnetic control mechanism which comprises a mounting plate, a static iron core is arranged on the mounting plate, a movable iron core is arranged on one side, far away from the mounting plate, of the static iron core, an inner cavity is defined by the static iron core and the movable iron core, and a switching-on and switching-off coil is arranged in the inner cavity. The opening and closing coil and the static iron core are fixedly connected with the mounting plate through a fastener, a protective shell is arranged on the periphery of the movable iron core, the movable iron core is fixedly connected with the protective shell through a fastener, and a longitudinal through hole through which an insulating pull rod of the pole-mounted switch can pass is formed in the central position of the mounting plate, the static iron core, the movable iron core and the protective shell. A spring is arranged in the longitudinal through hole, and a guide limiting structure parallel to the longitudinal direction is arranged between the protective shell and the mounting plate. According to the magnetic control mechanism, the problems of general movement controllability and high failure rate risk caused by too simple protection limiting structures configured for movable parts in some magnetic control mechanisms at present are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetically controlled switches, in particular to a magnetically controlled mechanism adapted for a switch on a column. Background Art

[0002] In the distribution network systems at home and abroad, intelligent pole-mounted switches are widely used as line protection equipment. At present, the opening and closing mechanism used by pole-mounted circuit breakers is a spring mechanism, which has a large number of parts and abnormal problems such as mechanism jamming caused by multi-stage transmission of the spring mechanism, resulting in a high failure rate of the mechanism and troublesome installation and debugging of the mechanism.

[0003] Chinese patent CN202222320919.1 discloses a complete set of pole-mounted magnetic circuit breaker with primary and secondary deep fusion that reduces failure rate, improves reliability, reduces installation difficulty and has secondary control. The utility model includes an automated terminal device and a circuit breaker housing installed on a pole tower, wherein the circuit breaker housing is provided with three sealed poles, wherein a synchronous shaft assembly and three magnetic control mechanisms connected to the synchronous shaft assembly are provided inside the circuit breaker housing, wherein the lower ends of the three sealed poles are respectively fixed in the three magnetic control mechanisms, wherein the outer end of the circuit breaker housing is provided with a separation and combination indicating device connected to the synchronous shaft assembly, wherein the automated terminal device is provided with a built-in magnetic controller, wherein the magnetic controller is electrically connected to the three magnetic control mechanisms, wherein a power-taking capacitor is sealed inside the sealed pole, and the power-taking capacitor is connected to the automated terminal device by electric wires.

[0004] The magnetic control mechanism in the above technical solution uses the power supply status of the opening and closing coil to control the relative position relationship between the moving iron core and the static iron core when working, but the structure of the two iron cores is relatively simple, and no corresponding protection structure and guide structure are configured. During the opening and closing activities of the iron cores, the concave and convex structure between the moving iron core and the opening and closing coil is mainly used to limit the position, and the insulating pull rod passes through the magnetic control mechanism. The limiting constraint structure formed, which will cause the moving parts of the magnetic control mechanism to be unstable during the opening and closing activities, thereby increasing the failure rate. Utility Model Content

[0005] The utility model provides a magnetic control mechanism, which is conducive to solving the problem that the protective limit structure configured for the movable parts in some current magnetic control mechanisms is too simple, resulting in general controllability of the activities and a high risk of failure rate.

[0006] The utility model is achieved in this way:

[0007] A magnetic control mechanism comprises a mounting plate, a static iron core is arranged on the mounting plate, a moving iron core is arranged on the side of the static iron core away from the mounting plate, an inner cavity is enclosed between the static iron core and the moving iron core, an opening and closing coil is arranged in the inner cavity, the opening and closing coil and the static iron core are connected and fixed to the mounting plate by fasteners, a protective shell is arranged on the periphery of the moving iron core, one side of the protective shell is opened and the opening is used to sleeve on the side of the moving iron core away from the mounting plate, the moving iron core is connected and fixed to the protective shell by fasteners, a longitudinal through hole is formed at the center position of the mounting plate, the static iron core, the moving iron core and the protective shell for the passage of an insulating pull rod of a pole switch, a spring capable of longitudinal expansion and contraction is arranged between the static iron core and the moving iron core in the longitudinal through hole, and a guide limit structure parallel to the longitudinal direction is arranged between the protective shell and the mounting plate.

[0008] On the basis of the above technical solution, the mounting plate is provided with a connection hole for connecting the bottom of the sealed pole of the pole-mounted switch.

[0009] On the basis of the above technical solution, the guide limiting structure includes a vertically arranged guide rod, one end of which is connected and fixed to the mounting plate, and the protective shell is provided with an extension sleeve which is sleeved on the guide rod.

[0010] On the basis of the above technical solution, the extension sleeve is an annular structure fixed on the outer side wall of the protective shell, and has a through hole structure adapted to the guide rod.

[0011] On the basis of the above technical solution, a plurality of extension sleeves are arranged on the outer wall of the protective sleeve in a centrally symmetrical manner in the longitudinal direction, and a plurality of guide rods corresponding to the extension sleeves are connected to the mounting plate.

[0012] On the basis of the above technical solution, the guide rod includes a smooth rod portion, a threaded portion and a nut portion, the threaded portion and the nut portion are arranged at the axial ends of the smooth rod portion, the extension sleeve can be slidably mounted in the smooth rod portion area, the threaded portion is threadedly connected to the mounting plate, and the nut portion forms a limiting structure of the extension sleeve on one side of the smooth rod portion.

[0013] On the basis of the above technical solution, the longitudinal through hole is located inside the static iron core and is provided with a bushing, and one end of the spring is sleeved on the bushing.

[0014] On the basis of the above technical solution, a first bolt is provided between the opening and closing coil and the mounting plate, and the first bolt passes through the mounting plate and the static iron core to be connected and fixed to the opening and closing coil.

[0015] On the basis of the above technical solution, a second bolt is provided between the moving iron core and the protective shell, and the second bolt passes through the protective shell and is connected and fixed to the moving iron core.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] The utility model provides a protective shell on the outside of the moving iron core, uses fasteners to make the protective shell and the moving iron core form a synchronous movable assembly, and provides a guide limit structure between the protective shell and the mounting plate, thereby improving the stability of the movable direction and stroke of the synchronous movable assembly. This is conducive to solving the problem that the protective limit structure configured for the movable parts in some current magnetic control mechanisms is too simple, resulting in general controllability of the activity and a high risk of failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic structural diagram of a magnetomechanical mechanism in one embodiment;

[0020] Figure 2 for Figure 1 Schematic diagram of the explosion structure;

[0021] Figure 3 A cross-sectional view of an embodiment;

[0022] Figure 4 for Figure 1 Schematic diagram of the structure of the middle guide rod.

[0023] Markings in the figure: 1. Mounting plate; 2. Static iron core; 3. Moving iron core; 4. Opening and closing coil; 5. Spring; 6. Bushing; 7. Protective shell; 71. Extension sleeve; 8. Guide rod; 81. Bare rod part; 82. Threaded part; 83. Nut part; a. First bolt; b. Second bolt. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the utility model.

[0025] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to an element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] See also Figures 1 to 4 The present embodiment discloses a magnetic control mechanism, which is composed of a mounting plate 1, a static iron core 2, a moving iron core 3, a switching coil 4, a spring 5, a bushing 6, a protective shell 7 and a guide rod 8. When in use, the mounting plate 1 is connected to and fixed to the bottom of the sealed pole of the column switch, and the bottom of the insulating pull rod of the sealed pole is penetrated and connected to the magnetic control mechanism. When opening and closing the switch, the opening and closing of the moving iron core 3 and the static iron core 2 in the magnetic control mechanism is used to realize the up and down movement of the insulating pull rod.

[0029] Specifically, the mounting plate 1 in this embodiment is composed of a double-layer plate structure. When in use, the mounting plate 1 is in a horizontal state. The mounting plate 1 is provided with a connecting hole for connecting the bottom of the sealed pole of the pole switch, thereby realizing the assembly connection between the magnetic control mechanism and the bottom of the sealed pole.

[0030] Combination Figure 3 As shown, a static iron core 2 is arranged on the mounting plate 1. When in use, the static iron core 2 is located at the bottom of the mounting plate 1. A moving iron core 3 is arranged on the side of the static iron core 2 away from the mounting plate 1. An annular groove is arranged on the adjacent sides of the static iron core 2 and the moving iron core 3. The two are close to each other in the longitudinal direction to form an inner cavity. A switching coil 4 is arranged in the inner cavity. When the switching coil 4 is energized, the moving iron core 3 moves upward and abuts against the static iron core 2 and merges. The switching coil 4 and the static iron core 2 are connected and fixed to the mounting plate 1 by fasteners. Specifically, in the present embodiment, a first bolt a is arranged between the switching coil 4 and the mounting plate 1. The first bolt a passes through the mounting plate 1 and the static iron core 2 and is connected and fixed to the switching coil 4. The first bolt a can also play a conductive role. The mounting plate 1 can flexibly set conductive partitions by using a double-layer structure.

[0031] A protective shell 7 is arranged on the periphery of the moving iron core 3. One side of the protective shell 7 is opened and the opening is used to sleeve on the side of the moving iron core 3 away from the mounting plate 1. The moving iron core 3 is connected and fixed to the protective shell 7 by fasteners. In this embodiment, a second bolt b is arranged between the moving iron core 3 and the protective shell 7. The second bolt b passes through the protective shell 7 and is connected and fixed to the moving iron core 3, so that the protective shell 7 and the moving iron core 3 form a synchronous movable assembly.

[0032] Furthermore, a guide limit structure parallel to the longitudinal direction is provided between the protective shell 7 and the mounting plate 1. The guide limit structure includes a vertically arranged guide rod 8, one end of which is connected and fixed to the mounting plate 1, and an extension sleeve 71 sleeved on the guide rod 8 is provided on the protective shell 7. When in use, the extension sleeve 71 slides up and down on the guide rod 8 to realize the longitudinal constraint of the synchronous movable assembly.

[0033] The extension sleeve 71 is an annular structure fixed on the outer wall of the protective shell 7, and has a through-hole structure adapted to the guide rod 8. The extension sleeve 71 and the protective shell 7 are an integrated structure. In this embodiment, two extension sleeves 71 are arranged on the outer wall of the protective shell in a central symmetric manner in the longitudinal direction, and two guide rods 8 corresponding to the extension sleeves 71 are connected to the mounting plate 1, which makes the upper and lower movement constraints of the synchronous movable assembly more three-dimensional and reliable.

[0034] Further, combined with Figure 4 As shown, the guide rod 8 includes a smooth rod portion 81, a threaded portion 82 and a nut portion 83, the threaded portion 82 and the nut portion 83 are respectively arranged at the axial ends of the smooth rod portion 81, the extended sleeve 71 can be slidably sleeved in the smooth rod portion 81 area, the threaded portion 82 is threadedly connected to the mounting plate 1, and the nut portion 83 forms a limiting structure of the extended sleeve 71 on one side of the smooth rod portion 81. This structure enables the moving iron core 3 to move downward and separate from the static iron core 2, and with the help of the synchronous downward movement of the protection guest, the extended sleeve 71 is driven to move downward along the smooth rod portion 81 and then abut against the nut portion 83, forming an in-place constraint, which is beneficial to protecting the movable parts of the magnetic control mechanism from excessive displacement during the downward movement and affecting the stroke of the core parts of the column switch.

[0035] The mounting plate 1, the static iron core 2, the moving iron core 3 and the protective shell 7 form a longitudinal through hole at the center position for the insulating pull rod of the pole switch to pass through. When in use, the insulating pull rod passes through the longitudinal through hole and is connected and fixed to the protective shell 7 by a flange structure. This is a prior art, and its specific structure and working principle will not be repeated here (for details, please refer to the relevant contents recorded in Chinese patent CN202222320919.1). Those skilled in the art can select and implement from the prior art according to actual operating conditions.

[0036] A spring 5 capable of longitudinal expansion and contraction is disposed in the longitudinal through hole between the static iron core 2 and the moving iron core 3. A bushing 6 is disposed inside the static iron core 2. One end of the spring 5 is sleeved on the bushing 6. The bushing 6 is used to connect the insulating pull rod and the static iron core 2, and can also play a certain limiting role for the spring 5.

[0037] Among them, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A magnetic control mechanism, characterized in that: The invention comprises a mounting plate (1), wherein a static iron core (2) is arranged on the mounting plate (1), a moving iron core (3) is arranged on the side of the static iron core (2) away from the mounting plate (1), an inner cavity is enclosed between the static iron core (2) and the moving iron core (3), a switching coil (4) is arranged in the inner cavity, the switching coil (4) and the static iron core (2) are connected and fixed to the mounting plate (1) by fasteners, a protective shell (7) is arranged on the periphery of the moving iron core (3), one side of the protective shell (7) is opened and the moving iron core (3) is sleeved on the moving iron core (3) by using the opening The iron core (3) is away from one side of the mounting plate (1), and the moving iron core (3) is connected and fixed to the protective shell (7) by means of fasteners. The mounting plate (1), the static iron core (2), the moving iron core (3) and the protective shell (7) form a longitudinal through hole at the center position through which the insulating pull rod of the pole switch can pass. A spring (5) capable of longitudinal expansion and contraction is disposed between the static iron core (2) and the moving iron core (3) in the longitudinal through hole, and a guide limit structure parallel to the longitudinal direction is disposed between the protective shell (7) and the mounting plate (1).

2. A magnetic control mechanism according to claim 1, characterized in that: The mounting plate (1) is provided with a connection hole for connecting the bottom of the sealed pole of the pole-mounted switch.

3. A magnetic control mechanism according to claim 1, characterized in that: The guide limiting structure comprises a vertically arranged guide rod (8), one end of which is connected and fixed to the mounting plate (1), and the protective shell (7) is provided with an extension sleeve (71) sleeved on the guide rod (8).

4. A magnetic control mechanism according to claim 3, characterized in that: The extending sliding sleeve (71) is an annular structure fixedly arranged on the outer side wall of the protective shell (7), and has a through hole structure adapted to fit the guide rod (8).

5. A magnetic control mechanism according to claim 4, characterized in that: A plurality of extension sleeves (71) are arranged on the outer wall of the protective sleeve in a centrally symmetrical manner in the longitudinal direction, and a plurality of guide rods (8) corresponding one to one with the extension sleeves (71) are connected to the mounting plate (1).

6. A magnetic control mechanism according to claim 5, characterized in that: The guide rod (8) comprises a smooth rod portion (81), a threaded portion (82) and a nut portion (83), wherein the threaded portion (82) and the nut portion (83) are respectively arranged at two axial ends of the smooth rod portion (81), and the extension sleeve (71) can be slidably sleeved on the smooth rod portion (81) area, the threaded portion (82) is threadedly connected to the mounting plate (1), and the nut portion (83) forms a limiting structure of the extension sleeve (71) on one side of the smooth rod portion (81).

7. The magnetic control mechanism according to claim 1, characterized in that: The longitudinal through hole is located inside the static iron core (2) and is provided with a bushing (6), and one end of the spring (5) is sleeved on the bushing (6).

8. The magnetic control mechanism according to claim 1, characterized in that: A first bolt (a) is provided between the opening and closing coil (4) and the mounting plate (1); the first bolt (a) passes through the mounting plate (1) and the static iron core (2) and is connected and fixed to the opening and closing coil (4).

9. The magnetic control mechanism according to claim 1, characterized in that: A second bolt (b) is provided between the moving iron core (3) and the protective shell (7), and the second bolt (b) passes through the protective shell (7) and is connected and fixed to the moving iron core (3).

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