Limit switch of power distribution control equipment

Abstract

The utility model discloses a limit switch for power distribution control equipment, which comprises a limit switch body, the limit switch body is embedded in a cabinet door, and a power distribution cabinet is arranged on the right side of the cabinet door; according to the utility model, the limit switch body is embedded in the mounting groove of the cabinet door, and the waterproof films are arranged at the opening of the metal shell of the limit switch body corresponding to the closing switch and the tripping switch; the protruding structures of the closing switch and the tripping switch form two protruding parts on the surface of the waterproof film, and the wave structures arranged on the two sides of the protruding parts are combined, so that a buffer space is provided for normal work of the closing switch and the tripping switch; and the metal shell and the waterproof film of the limit switch body provide an all-around protection effect for the closing switch and the tripping switch, so that the corrosion of sewage and humid gas in the external environment to the limit switch body can be obviously isolated.

Description

Technical Field

[0001] The utility model relates to the field of power distribution control equipment, in particular to a limit switch of power distribution control equipment. Background Art

[0002] High-voltage distribution cabinets are electrical products with voltage levels of 3.6kV to 550kV, which are used for switching, controlling or protecting in power generation, transmission, distribution, power conversion and consumption of power systems. They play a very important role in the entire power industry. When a fault occurs during the operation of the distribution cabinet or when electrical personnel make a mistake in operation, a power outage must be carried out for maintenance.

[0003] After searching, the publication number CN212725071U provides an electrical protection locking device, which is arranged on the cabinet of the high-voltage electrical cabinet. A limit switch is arranged at the connection between the cabinet side and the cabinet door. The limit switch includes a closing switch and a tripping switch. The auxiliary contact of the closing switch is connected in series with the closing circuit of the electrical system in the cabinet, and the auxiliary contact of the tripping switch is connected in parallel with the tripping circuit of the electrical system in the cabinet. The technical solution provided by the utility model does not affect the original electrical system design in the high-voltage distribution cabinet, introduces the mechanical action of opening and closing the cabinet door into the circuit control of the electrical system, and the closing switch and the tripping switch act at the same time, which has high reliability and safety, and ensures the safety of electrical workers.

[0004] However, since the limit switch of the high-voltage electrical cabinet is exposed and installed at the cabinet door, it is very easy to be damaged or fail due to the intrusion of external rain or humid gas during the opening and closing process of the high-voltage electrical cabinet, which has an adverse impact on the safety of electrical workers.

[0005] To this end, a limit switch for power distribution control equipment is proposed, which has the advantage of improving the protection effect of the limit switch, thereby solving the problems in the above-mentioned background technology. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes a limit switch for power distribution control equipment.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a limit switch for power distribution control equipment, comprising a limit switch body, wherein the limit switch body is embedded and installed on a cabinet door, and a power distribution cabinet is arranged on the right side of the cabinet door, and a hinge is hingedly installed between the power distribution cabinet and the cabinet door, and the limit switch body is composed of a metal shell and a closing switch and a tripping switch installed therein, and a waterproof film is bonded to the open part of the metal shell of the limit switch body, and a raised portion is respectively arranged on the surface of the waterproof film corresponding to the closing switch and the tripping switch, and wave structures are respectively arranged on both sides of the raised portion, and the two raised portions are in contact with the closing switch or the tripping switch.

[0008] As a further description of the above technical solution: a placement groove is opened on the side of the cabinet door facing the distribution cabinet, the limit switch body is embedded and installed in the placement groove, and the metal shell of the limit switch body is coated with a rubber surface, and the rubber surface is bonded to the inner side of the placement groove.

[0009] As a further description of the above technical solution: the closing switch of the limit switch body is connected in series with the closing circuit of the electrical system of the distribution cabinet, and the electrical system of the distribution cabinet is provided with a closing indicator light corresponding to the closing switch.

[0010] As a further description of the above technical solution: the trip switch of the limit switch body is connected in parallel with the trip circuit of the electrical system of the distribution cabinet, and the electrical system of the distribution cabinet is provided with a trip indicator light corresponding to the trip switch.

[0011] As a further description of the above technical solution: the material of the waterproof film is PVC, and the thickness of the waterproof film is 5-8mm.

[0012] As a further description of the above technical solution: the closing switch and the tripping switch are respectively provided with auxiliary contacts, the auxiliary contacts of the closing switch are normally open contacts, and the auxiliary contacts of the tripping switch are normally closed contacts.

[0013] The utility model has the following beneficial effects:

[0014] In the utility model, a limit switch body is embedded and installed in the mounting groove of the cabinet door, and a waterproof film is provided at the open part of the metal shell of the limit switch body corresponding to the closing switch and the tripping switch. When the closing switch and the tripping switch are working, two raised parts are formed on the surface of the waterproof film due to the protruding structures of the closing switch and the tripping switch. Combined with the wave structure provided on both sides of the raised parts, a buffer space is provided for the normal operation of the closing switch and the tripping switch. The metal shell and the waterproof film of the limit switch body provide a full range of protection effects for the closing switch and the tripping switch, which can significantly isolate the erosion of the limit switch body by sewage and humid gas in the external environment. On the one hand, the service life of the limit switch body is extended, and on the other hand, the safety of electrical workers is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a limit switch for power distribution control equipment of the utility model;

[0016] Figure 2 This is a sectional view of a cabinet door of a limit switch for power distribution control equipment of the utility model;

[0017] Figure 3This is a schematic diagram of the limit switch body structure of a limit switch for power distribution control equipment of the utility model (without the waterproof film installed).

[0018] Legend:

[0019] 1. Limit switch body; 2. Distribution cabinet; 3. Cabinet door; 4. Hinge; 5. Mounting slot; 6. Closing switch; 7. Tripping switch; 8. Waterproof film; 9. Raised part; 10. Wave structure; 11. Rubber surface. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only 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.

[0021] According to an embodiment of the utility model, a limit switch for power distribution control equipment is provided.

[0022] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-3 As shown, a limit switch for power distribution control equipment according to an embodiment of the utility model comprises a limit switch body 1, the limit switch body 1 is embedded and installed on a cabinet door 3, and a power distribution cabinet 2 is arranged on the right side of the cabinet door 3, a hinge 4 is hingedly installed between the power distribution cabinet 2 and the cabinet door 3, the limit switch body 1 is composed of a metal shell and a closing switch 6 and a tripping switch 7 installed therein, and a waterproof film 8 is bonded to the open part of the metal shell of the limit switch body 1, and a convex part 9 is respectively arranged on the surface of the waterproof film 8 corresponding to the closing switch 6 and the tripping switch 7, and both sides of the convex part 9 A wave structure 10 is respectively provided, and the two raised parts 9 are in contact with the closing switch 6 or the tripping switch 7. In order to achieve the purpose of introducing the mechanical action of opening and closing the cabinet door 3 into the circuit control of the electrical system and making the closing switch 6 and the tripping switch 7 act at the same time, the utility model also includes: a single-chip microcomputer, a circuit breaker, a closing coil, a positive pole of a power supply, a negative pole of a power supply, a tripping indicator light and a closing indicator light, which are specifically known prior arts and will not be described in detail. The closing circuit diagram of the device and the circuit diagram of the tripping circuit are conventional series or parallel, and will not be described in detail.

[0023] In one embodiment, a mounting groove 5 is provided on one side of the cabinet door 3 facing the power distribution cabinet 2, and the limit switch body 1 is embedded and installed in the mounting groove 5. The metal shell of the limit switch body 1 is coated with a rubber surface 11, and the rubber surface 11 is bonded to the inner side of the mounting groove 5. Through the setting of the mounting groove 5, the limit switch body 1 can be embedded and installed, which is convenient for installation and fixation.

[0024] In one embodiment, the closing switch 6 of the limit switch body 1 is connected in series with the closing circuit of the electrical system of the distribution cabinet 2, and the electrical system of the distribution cabinet 2 is provided with a closing indicator light corresponding to the closing switch 6, so as to introduce the mechanical action of opening and closing the cabinet door 3 into the circuit control of the electrical system, and make the closing switch 6 and the tripping switch 7 act at the same time.

[0025] In one embodiment, the trip switch 7 of the limit switch body 1 is connected in parallel with the trip circuit of the electrical system of the distribution cabinet 2, and the electrical system of the distribution cabinet 2 is provided with a trip indicator light corresponding to the trip switch 7, so as to introduce the mechanical action of opening and closing the cabinet door 3 into the circuit control of the electrical system, and make the closing switch 6 and the trip switch 7 act at the same time.

[0026] In one embodiment, the material of the waterproof film 8 is PVC, and the thickness of the waterproof film 8 is 5-8 mm.

[0027] In one embodiment, auxiliary contacts are respectively provided on the closing switch 6 and the tripping switch 7. The auxiliary contacts of the closing switch 6 are normally open contacts, and the auxiliary contacts of the tripping switch 7 are normally closed contacts. Through the setting of the auxiliary contacts, the closing switch 6 is connected in series with the closing circuit of the electrical system of the distribution cabinet 2, and the tripping switch 7 is connected in parallel with the tripping circuit of the electrical system of the distribution cabinet 2.

[0028] Working principle:

[0029] When in use, first connect the closing switch 6 in the limit switch body 1 in series with the closing circuit of the electrical system of the distribution cabinet 2, and connect the tripping switch 7 in the limit switch body 1 in parallel with the tripping circuit of the electrical system of the distribution cabinet 2, so that the electrical system can be closed and tripped during the opening and closing process of the cabinet door 3. When the closing switch 6 and the tripping switch 7 are working, two raised parts 9 are formed on the surface of the waterproof film 8 due to the protruding structures of the closing switch 6 and the tripping switch 7. Combined with the wave structure 10 set on both sides of the raised parts 9, a buffer space is provided for the normal operation of the closing switch 6 and the tripping switch 7. The metal shell of the limit switch body 1 and the waterproof film 8 provide a full range of protection for the closing switch 6 and the tripping switch 7, which can significantly isolate the limit switch body 1 from the erosion of sewage and humid gas in the external environment.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A limit switch for power distribution control equipment, comprising a limit switch body (1), characterized in that: The limit switch body (1) is embedded and installed on a cabinet door (3), and a power distribution cabinet (2) is arranged on the right side of the cabinet door (3). A hinge (4) is hingedly installed between the power distribution cabinet (2) and the cabinet door (3). The limit switch body (1) is composed of a metal shell and a closing switch (6) and a tripping switch (7) installed therein. A waterproof film (8) is bonded to the open part of the metal shell of the limit switch body (1). A protruding portion (9) is respectively arranged on the surface of the waterproof film (8) corresponding to the closing switch (6) and the tripping switch (7), and wave structures (10) are respectively arranged on both sides of the protruding portion (9), and the two protruding portions (9) are in contact with the closing switch (6) or the tripping switch (7).

2. A limit switch for power distribution control equipment according to claim 1, characterized in that: A mounting groove (5) is provided on a side of the cabinet door (3) facing the power distribution cabinet (2), and the limit switch body (1) is embedded and installed in the mounting groove (5). The metal shell of the limit switch body (1) is coated with a rubber surface (11), and the rubber surface (11) is bonded to the inner side of the mounting groove (5).

3. A limit switch for power distribution control equipment according to claim 1, characterized in that: The closing switch (6) of the limit switch body (1) is connected in series with the closing circuit of the electrical system of the power distribution cabinet (2), and the electrical system of the power distribution cabinet (2) is provided with a closing indicator light corresponding to the closing switch (6).

4. A limit switch for power distribution control equipment according to claim 1, characterized in that: The trip switch (7) of the limit switch body (1) is connected in parallel with the trip circuit of the electrical system of the power distribution cabinet (2), and the electrical system of the power distribution cabinet (2) is provided with a trip indicator light corresponding to the trip switch (7).

5. A limit switch for power distribution control equipment according to claim 1, characterized in that: The material of the waterproof film (8) is PVC, and the thickness of the waterproof film (8) is 5-8 mm.

6. A limit switch for power distribution control equipment according to claim 1, characterized in that: The closing switch (6) and the tripping switch (7) are respectively provided with auxiliary contacts, the auxiliary contacts of the closing switch (6) are normally open contacts, and the auxiliary contacts of the tripping switch (7) are normally closed contacts.

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