Waterproof microswitch for switch cabinet operating mechanism and switch cabinet operating mechanism

Abstract

The utility model provides a waterproof microswitch for a switch cabinet operating mechanism, which comprises a microswitch body, a movable contact mechanism and a static contact mechanism, the movable contact mechanism is mounted at the center of the microswitch body, and the static contact mechanism is mounted at the center of the microswitch body. The at least two static contact mechanisms are symmetrically installed on the left side and the right side of the microswitch body, each static contact mechanism comprises a static contact, a prefabricated line and a prefabricated mold pressing block, the prefabricated line is welded to the static contact, the prefabricated mold pressing block wraps and seals a welding point of the prefabricated line and the static contact, and the prefabricated line is welded to the static contact. And the static contact is exposed. The utility model also provides a switch cabinet operating mechanism. The beneficial effects of the utility model are that the prefabricated wires and the prefabricated molded blocks are adopted, so that the hidden danger of poor contact at the lap joint is reduced, the cost is saved, and the installation, debugging and wiring time is reduced; and the hidden danger of condensation caused by the influence of the external environment during long-term operation is avoided.

Description

Technical Field

[0001] The utility model relates to a switch cabinet operating mechanism, in particular to a waterproof micro switch used for the switch cabinet operating mechanism and the switch cabinet operating mechanism. Background Art

[0002] China Southern Power Grid Co., Ltd. has launched the "Technical Specifications for 10kV Atmospheric Sealed Air Insulated Circuit Breaker Automation Cabinet", "Standardized Technical Specifications for 10kV SF6 Fully Insulated Circuit Breaker Automation Cabinet", "Standardized Technical Specifications for 10kV SF6 Fully Insulated Load Switch Automation Cabinet", etc., which clearly stated that "the micro switches of the switchgear operating mechanism meet the IP67 requirements in GB 4208, and the auxiliary switch outlets are prefabricated wire type". By utilizing the characteristics of the prefabricated wire type IP67 waterproof micro switches, the condensation source of the secondary control is isolated outside the equipment. Enhance reliability, reduce damage and extend its service life. It is of great significance to promote and guide the research and development and production of electrical equipment manufacturers. The micro switches of the switchgear operating mechanism play an important role in the stable operation of the switchgear, and are used for automatic control and safety protection in equipment that requires frequent circuit switching.

[0003] The traditional way of leading out the micro switch contact of the switch cabinet operating mechanism is screw crimping or spring plug. When connecting to the outside, a wire fork or spring plug is required, which has the risk of screws not being tightened and spring plugs being loose. It is not only time-consuming and labor-intensive, but also inefficient, with a high failure rate and increased inspection time. In addition, the overlap of the micro switch contact is exposed to the outside, which may be affected by the external environment during long-term operation, and there is a risk of condensation. Summary of the invention

[0004] In order to solve the problems in the prior art, the utility model provides a waterproof micro switch for a switch cabinet operating mechanism and a switch cabinet operating mechanism.

[0005] The main purpose of the utility model is to propose a waterproof micro switch for a switch cabinet operating mechanism, aiming to solve the technical problems mentioned in the background technology. The waterproof micro switch is a prefabricated wire type, which reduces the hidden danger of poor contact at the overlap, saves costs and reduces the installation, debugging and wiring time; the waterproof micro switch has a protection level of IP67, which avoids the hidden danger of condensation caused by the influence of the external environment during long-term operation, and plays an important role in the stability and service life of the switch cabinet operating mechanism.

[0006] The utility model provides a waterproof micro switch for a switch cabinet operating mechanism, comprising a micro switch body, a moving contact mechanism and a static contact mechanism, wherein the moving contact mechanism is installed at the center of the micro switch body, the static contact mechanism has at least two and is symmetrically installed on the left and right sides of the micro switch body, the static contact mechanism comprises a static contact, a prefabricated wire and a prefabricated molded block, the prefabricated wire is welded on the static contact, the prefabricated molded block wraps and closes the welding point between the prefabricated wire and the static contact, and exposes the static contact.

[0007] As a further improvement of the present utility model, the moving contact mechanism includes a mechanical force contact mechanism, a push rod sealing sleeve, a moving contact push rod module and a moving contact, the push rod sealing sleeve is installed on the micro switch body, the moving contact push rod module is installed inside the micro switch body, the moving contact push rod module and the micro switch body adopt an up and down sliding fit, the moving contact push rod module includes an upper push rod and a lower push rod, the upper push rod passes through the push rod sealing sleeve and is pressed into a switch fit with the mechanical force contact mechanism, and the lower push rod is connected to the moving contact.

[0008] As a further improvement of the utility model, the push rod sealing sleeve is clamped between the upper push rod and the micro switch body.

[0009] As a further improvement of the present invention, the mechanical force contact mechanism includes a pressure plate and a roller, one end of the pressure plate is rotationally connected to the micro switch body, and the other end of the pressure plate is connected to the roller.

[0010] As a further improvement of the utility model, the pressing plate is arranged obliquely and is located above the upper push rod.

[0011] As a further improvement of the present invention, the mechanical force contact mechanism further includes a reset spring, the reset spring is clamped between the pressure plate and the micro switch body, and the reset spring is coaxially installed with the push rod sealing sleeve.

[0012] As a further improvement of the utility model, the micro switch body is installed on the switch cabinet operating mechanism.

[0013] As a further improvement of the utility model, the push rod sealing sleeve adopts a silicone sealing sleeve.

[0014] As a further improvement of the present invention, the micro switch body is connected to a switch body cover, a mounting cavity is formed between the switch body cover and the micro switch body, and the moving contact mechanism and the static contact mechanism are respectively mounted in the mounting cavity.

[0015] The utility model also provides a switch cabinet operating mechanism, comprising the waterproof micro switch.

[0016] The beneficial effects of the utility model are: providing a waterproof micro switch for a switch cabinet operating mechanism, using prefabricated wires and prefabricated molded blocks, reducing the hidden danger of poor contact at the overlap, saving costs and reducing installation, debugging and wiring time; avoiding the hidden danger of condensation caused by the influence of the external environment during long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other solutions can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a three-dimensional schematic diagram of a waterproof micro switch used for a switch cabinet operating mechanism of the utility model;

[0019] Figure 2 It is an internal schematic diagram of a waterproof micro switch used in a switch cabinet operating mechanism of the utility model;

[0020] Figure 3 This is a front view of a waterproof micro switch used for a switch cabinet operating mechanism of the utility model;

[0021] Figure 4 It is a side view of a waterproof micro switch used for the operating mechanism of a switch cabinet of the utility model;

[0022] Figure 5 yes Figure 4 Sectional view AA. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 limiting the scope of protection of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figures 1 to 5 As shown, a waterproof micro switch for a switch cabinet operating mechanism comprises a micro switch body 1, a moving contact mechanism and a static contact mechanism.

[0028] The moving contact mechanism is installed at the center of the micro switch body 1 , and there are at least two static contact mechanisms which are symmetrically installed on the left and right sides of the micro switch body 1 .

[0029] The static contact mechanism includes a static contact 8, a prefabricated wire 6 and a prefabricated molded block 7. The prefabricated wire 6 is welded to the static contact 8. The prefabricated molded block 7 wraps and closes the welding point between the prefabricated wire 6 and the static contact 8, and exposes the static contact 8.

[0030] The prefabricated wire 6 is pre-welded to the static contact 8 , and the welding point between the two is pre-molded and sealed by a plastic mold to expose the static contact 8 , thereby forming a prefabricated molded block 7 .

[0031] The moving contact mechanism includes a mechanical force contact mechanism 2, a push rod sealing sleeve 3, a moving contact push rod module 4 and a moving contact 5. The push rod sealing sleeve 3 is installed on the micro switch body 1, and the moving contact push rod module 4 is installed inside the micro switch body 1. The moving contact push rod module 4 and the micro switch body 1 adopt an up and down sliding fit. The moving contact push rod module 4 includes an upper push rod and a lower push rod. The upper push rod passes through the push rod sealing sleeve 3 and is pressed into a switch fit with the mechanical force contact mechanism 2. The lower push rod is connected to the moving contact 5.

[0032] The push rod sealing sleeve 3 is clamped between the upper push rod and the micro switch body 1 .

[0033] The mechanical force contact mechanism includes a pressing plate 22 and a roller 21 . One end of the pressing plate 22 is rotatably connected to the micro switch body 1 , and the other end of the pressing plate 22 is connected to the roller 21 .

[0034] The pressing plate 22 is arranged obliquely and is located above the upper push rod.

[0035] The mechanical force contact mechanism further includes a reset spring 23 , which is clamped between the pressure plate 22 and the micro switch body 1 , and is coaxially mounted with the push rod sealing sleeve 3 .

[0036] The micro switch body 1 is installed on the switch cabinet operating mechanism.

[0037] The push rod sealing sleeve 3 adopts a silicone sealing sleeve, preferably a silicone shrink structure sealing sleeve. The use of silicone material is conducive to improving the sealing performance. The push rod sealing sleeve 3 is installed at the entrance of the moving contact push rod module 4, the inner side is tightly wrapped around the upper push rod, and the outer side end is pressed against the micro switch body 1 to achieve the sealing and movement of the moving contact push rod module 4.

[0038] The micro switch body 1 is connected to a switch body cover 9 , and a mounting cavity is formed between the switch body cover 9 and the micro switch body 1 . The moving contact mechanism and the static contact mechanism are respectively mounted in the mounting cavity.

[0039] A switch cabinet operating mechanism comprises the waterproof micro switch.

[0040] The utility model provides a waterproof micro switch for a switch cabinet operating mechanism, which is a fast switch that brakes by applying an external mechanical force. A specific protection function is achieved through a push rod sealing sleeve 3 and a prefabricated molded block 7. The working principle is as follows: a micro switch body 1 is mounted on the switch cabinet operating mechanism, and an external mechanical force acts on a roller 21 to rotate and press a pressure plate 22 downward. When the energy accumulates to a critical point, a moving contact 5 is pushed to move by a moving contact push rod module 4. The moving contact 5 has two stop positions, which are respectively in contact with an upper contact and a lower contact of a static contact 8, thereby achieving an opening and closing function of the micro switch.

[0041] The utility model provides a waterproof micro switch for a switch cabinet operating mechanism. During assembly, a moving contact push rod module 4 is installed into a micro switch body 1, a push rod sealing sleeve 3 is installed, a prefabricated molded block 7 is installed, sealant is applied to the contact between the micro switch body 1 and the prefabricated molded block 7 and a switch body cover 9, and then the switch body cover 9 is sealed, and finally a mechanical force contact mechanism 2 is assembled.

[0042] The utility model provides a waterproof micro switch for a switch cabinet operating mechanism, which does not increase the occupied space compared with a non-waterproof micro switch.

[0043] The utility model provides a waterproof micro switch for a switch cabinet operating mechanism and a switch cabinet operating mechanism, which can realize the one-open-one-close contact function of the micro switch itself and the anti-condensation and waterproof function of the micro switch wiring.

[0044] The utility model provides a waterproof micro switch for a switch cabinet operating mechanism and a switch cabinet operating mechanism, which has the following advantages:

[0045] 1. The waterproof micro switch adopts prefabricated wire and prefabricated molded block. The static contact at the interface is welded with the prefabricated wire and plastic packaged to form a prefabricated molded block to ensure the sealing of the wiring port;

[0046] 2. Use a push rod sealing sleeve, preferably a silicone shrink structure sleeve with good elasticity, which can close the gap between the moving contact push rod module 4 and the micro switch body 1 to ensure that the protection level reaches IP67.

[0047] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A waterproof micro switch for a switch cabinet operating mechanism, characterized in that: It includes a micro switch body, a moving contact mechanism and a static contact mechanism, wherein the moving contact mechanism is installed at the center of the micro switch body, there are at least two static contact mechanisms and they are symmetrically installed on the left and right sides of the micro switch body, and the static contact mechanism includes a static contact, a prefabricated wire and a prefabricated molded block, the prefabricated wire is welded on the static contact, and the prefabricated molded block wraps and closes the welding point between the prefabricated wire and the static contact, and exposes the static contact.

2. The waterproof micro switch for the switch cabinet operating mechanism according to claim 1, characterized in that: The moving contact mechanism includes a mechanical force contact mechanism, a push rod sealing sleeve, a moving contact push rod module and a moving contact. The push rod sealing sleeve is installed on the micro switch body, and the moving contact push rod module is installed inside the micro switch body. The moving contact push rod module and the micro switch body adopt an up and down sliding fit. The moving contact push rod module includes an upper push rod and a lower push rod. The upper push rod passes through the push rod sealing sleeve and is pressed into a switch fit with the mechanical force contact mechanism. The lower push rod is connected to the moving contact.

3. The waterproof micro switch for the switch cabinet operating mechanism according to claim 2, characterized in that: The push rod sealing sleeve is clamped between the upper push rod and the micro switch body.

4. The waterproof micro switch for the switch cabinet operating mechanism according to claim 2, characterized in that: The mechanical force contact mechanism comprises a pressing plate and a roller, one end of the pressing plate is rotatably connected to the micro switch body, and the other end of the pressing plate is connected to the roller.

5. The waterproof micro switch for the switch cabinet operating mechanism according to claim 4, characterized in that: The pressing plate is arranged obliquely and is located above the upper push rod.

6. The waterproof micro switch for the switch cabinet operating mechanism according to claim 4, characterized in that: The mechanical force contact mechanism also includes a reset spring, which is clamped between the pressure plate and the micro switch body, and the reset spring is coaxially installed with the push rod sealing sleeve.

7. The waterproof micro switch for the switch cabinet operating mechanism according to claim 1, characterized in that: The micro switch body is installed on the switch cabinet operating mechanism.

8. The waterproof micro switch for the switch cabinet operating mechanism according to claim 2, characterized in that: The push rod sealing sleeve is a silicone sealing sleeve.

9. The waterproof micro switch for the switch cabinet operating mechanism according to claim 1, characterized in that: The micro switch body is connected with a switch body cover, and a mounting cavity is formed between the switch body cover and the micro switch body. The moving contact mechanism and the static contact mechanism are respectively mounted in the mounting cavity.

10. A switch cabinet operating mechanism, characterized in that: It comprises the waterproof micro switch as claimed in any one of claims 1 to 9.

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