High-reliability explosion-proof reversing switch
By designing a multi-support limit structure and terminal box in the explosion-proof conversion reverse switch, the problem of insufficient stability and applicability of the existing explosion-proof conversion switch is solved, and higher stability and higher wiring reliability are achieved.
Patent Information
- Application Number
- CN202421300226.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-06-07
AI Technical Summary
The existing explosion-proof converter switch is prone to shaking or rotating when twisting the rotating handle, causing friction between the converter switch and the front cover, reducing stability and service life. It is also not suitable for reverse switch installation, which is low inapplicability and inconvenient wiring connection, resulting in low reliability.
An explosion-proof conversion reverse switch including a shell, a conversion switch, a front cover and a bottom cover is designed. By providing a limiting hole and a support screw hole on the rear wall of the front cover, and fixing screws and support screws are installed on both sides of the switch to realize a multiple support limit structure and improve stability; a terminal box is installed at the bottom of the shell, and the conductors are fixed through the terminals, which simplifies the wiring process and improves the connection reliability.
Through the multi-support limit structure, the stability and service life of the switch are improved, the applicability is also improved, the wiring process is more convenient, and the connection reliability is also improved.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of explosion-proof switches, in particular to an explosion-proof forward-reverse conversion switch with high reliability. Background Art
[0002] An explosion-proof switch is a switch device specially designed to work in an environment with explosion hazards. This switch can ensure safe and reliable operation in flammable and explosive environments, avoiding explosion accidents caused by factors such as electric sparks. Common places of use include coal mining industry, petrochemical industry, paint or ink manufacturers, wood processing plants, cement plants, shipping and sewage treatment. Since these places have a high risk of explosion, explosion-proof switches are used to ensure the safety of equipment and personnel.
[0003] The conversion switch inside the explosion-proof conversion switch under the prior art is usually fixed to the front cover only by two thin screws. When operating, the switch is switched by turning the rotary handle at the front end of the conversion switch. Since there is no additional mechanism to support and limit the conversion switch, the conversion switch is prone to shaking or rotating when the rotary handle is turned, resulting in friction between the conversion switch and the front cover, which not only reduces the stability but also reduces the service life of the conversion switch; and it cannot be adapted to the installation of the forward and reverse switch during use, resulting in low applicability; and the existing explosion-proof conversion switch usually peels off the insulation at the end of the wire when wiring, and the conductive copper wire of the wire is wound around the surface of the wiring copper column at the bottom of the shell and the wire is compressed by a nut. This method not only makes the installation and connection of the wire inconvenient, but also because the conductive copper column is a smooth cylindrical structure, the wire and the conductive copper column are prone to rotation and loosening, resulting in low connection reliability, which is not conducive to long-term use. Utility Model Content
[0004] The utility model provides an explosion-proof forward-reverse conversion switch with high reliability to solve the problems raised in the above-mentioned background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A highly reliable explosion-proof forward-reverse conversion switch comprises a shell, a conversion switch arranged inside the shell, a front cover arranged at the front end of the shell, and a bottom cover arranged at the bottom of the shell, wherein both sides of the rear wall of the front cover are provided with limit holes, the outer sides of the two limit holes are provided with support screw holes, the top and bottom of the limit holes are provided with a plurality of forward-reverse switch screw holes, both sides of the conversion switch are provided with fixing screws, the end of the fixing screw close to the front cover is inserted into the limiting hole, one end of the conversion switch is provided with a clamping plate, both sides of the clamping plate are provided with support screws, the support screws are screwed into the support screw holes, a wiring cavity is provided at the bottom of the shell, a wire opening is provided in the middle of the wiring cavity, bridge plate screw holes are provided on both sides of the wire opening, a mounting bridge plate is provided on the bridge plate screw holes, and a wiring terminal box is installed on the mounting bridge plate.
[0007] Preferably, a plurality of connection terminals are provided at both the front and rear ends of the connection terminal box.
[0008] Preferably, a wire inlet is provided at the bottom of the bottom cover, and a wire outlet is provided on one side of the wire inlet.
[0009] Preferably, mounting blocks are provided on both sides of the rear portion of the shell.
[0010] Preferably, the front end of the conversion switch passes through the front cover and is connected to a rotary handle.
[0011] Beneficial Effects
[0012] The above one or more technical solutions in the explosion-proof forward-reverse switch with high reliability provided by the embodiment of the utility model have at least one of the following technical effects:
[0013] Through the above technical scheme, by providing limiting holes and supporting screw holes on both sides of the rear wall of the front cover, and providing fixing bolts and supporting bolts on both sides of the conversion switch, the fixing bolts are inserted into the limiting holes, and the supporting bolts are screwed with the supporting screw holes to achieve the fixation and support of the conversion switch, so that the conversion switch has multiple support and limiting structures, which can effectively improve the stability of the conversion switch, avoid the damage of the conversion switch caused by excessive friction between the conversion switch and the front cover, and effectively improve the service life of the conversion switch; by pre-setting a number of forward-reverse switch screw holes on the rear wall of the front cover, the conversion switch can be replaced with a forward-reverse switch, and the forward-reverse switch can be installed and fixed through a number of forward-reverse switch screw holes, thereby improving the applicability; by installing a wiring terminal box at the bottom of the shell, when wiring, the conductive end of the wire is inserted into a number of wiring terminals and fixed to complete the connection of the wire, which not only makes the wiring more convenient, but also avoids the loosening of the wire due to rotation, thereby improving the reliability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model from top view;
[0016] Figure 3 This is a rear view structural diagram of the front cover of the utility model;
[0017] Figure 4 This is a schematic diagram of the bottom structure of the shell of the utility model;
[0018] Figure 5 This is a schematic diagram of the installation structure of the utility model conversion switch;
[0019] Figure 6 This is a schematic diagram of the installation structure of the wiring terminal box of the utility model;
[0020] The corresponding relationship between the illustrations and component names in the figure is as follows:
[0021] 1. Housing; 2. Conversion switch; 3. Front cover; 4. Bottom cover; 5. Limiting hole; 6. Support screw hole; 7. Forward and reverse switch screw hole; 8. Fixing screw; 9. Clamping plate; 10. Support screw; 11. Wiring cavity; 12. Wire through port; 13. Bridge plate screw hole; 14. Bridge plate installation; 15. Wiring terminal box; 16. Wire inlet; 17. Wire outlet; 18. Mounting block; 19. Rotary handle. DETAILED DESCRIPTION
[0022] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.
[0023] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0024] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected 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.
[0025] like Figure 1-6 As shown, it is a structural schematic diagram of a highly reliable explosion-proof forward-reverse conversion switch in a preferred embodiment of the utility model;
[0026] In this embodiment, it includes a shell 1, a conversion switch 2 arranged inside the shell 1, a front cover 3 arranged at the front end of the shell 1, and a bottom cover 4 arranged at the bottom of the shell 1. The front cover 3 is fixed to the front end of the shell 1 by a plurality of bolts, and the bottom cover 4 is fixed to the bottom of the shell 1 by a plurality of bolts. Limiting holes 5 are provided on both sides of the rear wall of the front cover 3, and supporting screw holes 6 are provided on the outer sides of the two limiting holes 5. A plurality of forward and reverse switch screw holes 7 are provided on the top and bottom of the limiting holes 5, and the plurality of forward and reverse switch screw holes 7 are arranged in an array. Fixed screws 8 are provided on both sides of the conversion switch 2, and the end of the fixed screw 8 close to the front cover 3 is inserted into the limiting hole 5. The supporting effect of the conversion switch 2 is achieved through this structure, thereby improving stability. The conversion switch 2 has a clamping plate 9 at one end, and support screws 10 are provided on both sides of the clamping plate 9. The support screws 10 are screwed into the support screw holes 6, and the installation and fixation of the conversion switch 2 is achieved through this structure; a wiring cavity 11 is provided at the bottom of the shell 1, and a wire opening 12 is provided in the middle of the wiring cavity 11. The wire opening 12 is connected to the inside of the shell 1, and the connecting wires of the conversion switch 2 enter the wiring cavity 11 through the wire opening 11. Bridge plate screw holes 13 are provided on both sides of the wire opening 12, and a mounting bridge plate 14 is fixed on the bridge plate screw holes 13 by screws. A terminal box 15 is fixedly installed on the mounting bridge plate 14, and the connecting wires of the conversion switch 2 are electrically connected to the terminal box 15.
[0027] In this embodiment, the front and rear ends of the terminal box 15 are provided with a plurality of terminals, and the tops of the plurality of terminals are provided with clamping screws. The conductive ends of the wires are inserted into the terminal blocks and the clamping screws are tightened to clamp the wires.
[0028] In this embodiment, a line inlet 16 is provided at the bottom of the bottom cover 4, and a line outlet 17 is provided at one side of the line inlet 16. The line inlet 16 is used for incoming lines, and the line outlet 17 is used for outgoing lines.
[0029] In this embodiment, mounting blocks 18 are provided on both sides of the rear portion of the housing 1 , and the housing 1 is fixedly mounted in a designated area by bolts through the mounting blocks 18 .
[0030] In this embodiment, the front end of the conversion switch 2 passes through the front cover 3 and is connected to a handle 19. During operation, the conversion switch 2 is turned by turning the handle 19 to complete the opening or closing action (the principle of the conversion switch 2 is a well-known technology to technicians in this field, so it will not be described in detail).
[0031] The utility model provides an explosion-proof forward-reverse conversion switch with high reliability. Its installation method, connection method or setting method are all common mechanical methods, and any method that can achieve its beneficial effects can be implemented.
[0032] Technologies not described in detail in the present invention are all well-known technologies. Those skilled in the art can easily implement the present invention based on understanding this specification, and the contents shown in the drawings are part of this specification.
[0033] The above content is a further detailed description of the utility model in combination with specific implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the scope of protection determined by the claims submitted for the utility model.
Claims
1. An explosion-proof forward / reverse switch with high reliability, comprising a housing (1), a switch (2) arranged inside the housing (1), a front cover (3) arranged at the front end of the housing (1), and a bottom cover (4) arranged at the bottom of the housing (1), characterized in that: The rear wall of the front cover (3) is provided with limiting holes (5) on both sides, and the outer sides of the two limiting holes (5) are provided with supporting screw holes (6). The top and bottom of the limiting holes (5) are provided with a plurality of forward and reverse switch screw holes (7). The two sides of the conversion switch (2) are provided with fixing screws (8). The end of the fixing screw (8) close to the front cover (3) is inserted into the limiting hole (5). A pressing plate (9) is provided at one end of the conversion switch (2). Support screws (10) are provided on both sides of the clamping plate (9), and the support screws (10) are screwed into the support screw holes (6). A wiring cavity (11) is provided at the bottom of the shell (1), and a wire opening (12) is provided in the middle of the wiring cavity (11). Bridge plate screw holes (13) are provided on both sides of the wire opening (12), and a mounting bridge plate (14) is provided on the bridge plate screw holes (13), and a wiring terminal box (15) is installed on the mounting bridge plate (14).
2. According to claim 1, a highly reliable explosion-proof forward / reverse switch, characterized in that: The front and rear ends of the terminal box (15) are both provided with a plurality of terminal blocks.
3. The explosion-proof forward / reverse switch with high reliability according to claim 1, characterized in that: The bottom of the bottom cover (4) is provided with a wire inlet (16), and one side of the wire inlet (16) is provided with a wire outlet (17).
4. The explosion-proof forward / reverse switch with high reliability according to claim 1, characterized in that: Mounting blocks (18) are provided on both sides of the rear portion of the housing (1).
5. The explosion-proof forward / reverse switch with high reliability according to claim 1, characterized in that: The front end of the conversion switch (2) passes through the front cover (3) and is connected to a rotary handle (19).