A PLC relay controller for a water turbine governor

Abstract

The utility model relates to the technical field of relay controller installation discloses a PLC relay controller for water turbine speed regulator, including controller body and relay board, its characterized in that, the controller body is equipped with the connecting piece of concave, the upper and lower ends of connecting piece are the upper bending part and the lower bending part of vertical setting, the back of relay board is equipped with the upper mounting groove and the lower mounting groove respectively with the upper bending part and the lower bending part, the connecting piece fixes relay board in controller body. It is convenient and quick to install and dismount relay board.

Description

Technical Field

[0001] This utility model relates to the field of relay controller installation technology, specifically to a PLC relay controller for a water turbine speed governor. Background Technology

[0002] In the automatic control of the turbine governor, the PLC is the control core of the entire equipment. Its contact capacity is small. If it directly controls the terminal actuator, the excessive load will burn out the PLC body and cause great losses. Therefore, in the conventional secondary control circuit, it is considered to control the intermediate relay coil by the PLC output signal, and connect the contacts of the intermediate relay in series with the control circuit of each actuator to effectively ensure the safe operation of the PLC.

[0003] Currently, in the secondary circuits of equipment, encapsulated relay boards are used for terminals with frequent operations. Their advantages, such as fast switching speed, high sensitivity, low power consumption, and low electromagnetic interference, make them suitable for automatic control circuits of speed controllers. However, in daily use, it has been found that due to their encapsulated structure, their heat dissipation efficiency is very low, leading to frequent burnouts. This results in either short circuits or failure to execute PLC instructions in the control circuit.

[0004] Chinese patent document CN202013499U discloses a piezoelectric Jacquard comb control and drive system, including an industrial computer, a control box, 1 to 32 drive boxes, a bus terminator, and 4 spindle sensors. Each drive box includes a chassis, a motherboard, a relay board, and 1 to 12 drive boards. The relay board has a first RS-422 interface, a second RS-422 interface, and a serial data bus interface. Each drive board has a serial data bus interface. The motherboard is a printed circuit board, fixedly mounted inside the chassis. The relay boards and each drive board are mounted on the motherboard in a plug-in manner through their respective serial data bus interfaces, and the serial data bus interface of the relay board is electrically connected to the serial data bus interface of each drive board. Each drive board has an output drive terminal that is electrically connected to the piezoelectric Jacquard comb during use.

[0005] The existing technology has the following shortcomings: In the automatic control of the turbine governor, it is necessary to disconnect the power supply and tighten the screws to inspect or replace the relay board. The relay board cannot be easily and quickly disassembled. If the replacement process is slow, it will prolong the time for fault location and system recovery. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a PLC relay controller for a water turbine speed governor, including a controller body and a relay board. A concave connecting piece is fixed in the controller body by screws. The upper and lower ends of the connecting piece are vertically arranged upper and lower bends. The back of the relay board is provided with an upper mounting groove and a lower mounting groove that respectively fit with the upper and lower bends. The connecting piece fixes the relay board in the controller body.

[0007] For ease of disassembly and installation, the upper mounting groove is vertically positioned on the lower end face of the upper protruding platform, and the lower mounting groove is vertically positioned on the upper end face of the lower protruding platform. The distance between the upper bend and the lower bend is less than the distance between the upper mounting groove and the lower mounting groove.

[0008] To prevent the relay board from falling off, a limiting member is provided above the lower protruding platform, and a space is provided between the limiting member and the lower protruding platform for the lower end of the connecting piece to enter the lower mounting groove.

[0009] Preferably, the height of the space is less than the length of the lower bend. The lower bend can be slightly tilted into the space and then inserted into the lower mounting slot for fixation. At the same time, due to the gravity of the relay plate, the limiting member can prevent the lower bend from detaching from the lower mounting slot.

[0010] To facilitate quick disengagement from the upper bend, a raised portion is provided above the upper protruding platform. One end of the raised portion is inserted into a groove at the root of the upper protruding platform. The raised portion lifts the groove, causing the upper protruding platform to tilt downwards, and the upper bend disengages from the upper mounting groove.

[0011] To facilitate the installation of the upper and lower bending parts, the lower end of the upper protruding platform is inclined upwards, and the upper end of the lower protruding platform is inclined downwards.

[0012] To prevent deformation of the relay plate during installation, a support is provided between the upper protruding platform and the limiting member. The support is located within the concave structure of the connecting piece and is used to push against the connecting piece when the relay plate is deformed by force.

[0013] Preferably, the left and right ends of the back of the relay plate are provided with upper mounting grooves and lower mounting grooves for the upper bending part and the lower bending part to fit together.

[0014] This utility model has the following beneficial effects:

[0015] 1. Quick installation and disassembly: The upper and lower bends of the connecting piece fit into the upper and lower mounting grooves on the back of the repeater board, enabling quick installation and fixation. Combined with the inclined mounting surface and the raised part design, the repeater board can be easily snapped into place or quickly detached by pressing the raised part, significantly simplifying the installation and disassembly steps. It can be operated without tools, shortening the inspection and replacement time and improving maintenance efficiency.

[0016] 2. Simple structure, easy to manufacture and maintain: The overall structure is ingeniously designed but relatively simple. It mainly relies on the stamping / bending connecting pieces and the forming grooves on the back of the relay plate to achieve its function, which is easy to process and manufacture. At the same time, the design of setting mounting grooves at both ends (left and right ends) not only enhances the installation stability, but also facilitates modular expansion or adaptation to different layout requirements, improving versatility and maintainability. Attached Figure Description

[0017] Figure 1 This is an installation diagram of an embodiment of the PLC relay controller for a water turbine speed governor according to this utility model;

[0018] Figure 2 for Figure 1 Sectional view of AA;

[0019] Figure 3 This is a schematic diagram of the relay board structure;

[0020] Figure 4 for Figure 3 Side view. Detailed Implementation

[0021] The following detailed description illustrates the specific implementation method:

[0022] The reference numerals in the accompanying drawings include: controller body 1, relay board 2, connecting piece 3, upper bend 301, lower bend 302, upper mounting groove 4, lower mounting groove 5, upper raised platform 6, groove 601, lower raised platform 7, limiting member 8, raised part 9, pressing part 10, and support member 11.

[0023] Example 1

[0024] like Figure 1-4 As shown, a PLC relay controller for a water turbine speed governor includes a controller body 1 and a relay plate 2. The controller body 1 has a concave connecting piece 3. The upper and lower ends of the connecting piece 3 are vertically arranged upper bending part 301 and lower bending part 302. The back of the relay plate 2 has an upper mounting groove 4 and a lower mounting groove 5 that respectively fit with the upper bending part 301 and the lower bending part 302. The connecting piece 3 fixes the relay plate 2 inside the controller body 1.

[0025] The upper mounting groove 4 is vertically disposed on the lower end face of the upper protruding platform 6, and the lower mounting groove 5 is vertically disposed on the upper end face of the lower protruding platform 7. The distance between the upper bending part 301 and the lower bending part 302 is less than the distance between the upper mounting groove 4 and the lower mounting groove 5.

[0026] The depth of the upper mounting groove 4 is less than the depth of the lower mounting groove 5, making disassembly easier.

[0027] A horizontal limiting member 8 is provided above the lower protruding platform 7, and a space is provided between the limiting member 8 and the lower protruding platform 7 for the lower end of the connecting piece 3 to enter the lower mounting groove 5.

[0028] The height of the space is less than the length of the lower bend 302. The lower bend 302 can be slightly tilted into the space and then inserted into the lower mounting groove 5 for fixation. At the same time, due to the gravity of the relay plate 2, the limiting member 8 can prevent the lower bend 302 from coming out of the lower mounting groove 5.

[0029] The upper raised platform 6 is provided with a raised part 9. The raised part 9 and the upper raised platform 6 are made of plastic and have a certain deformation ability. After deformation, they can be reset. One end of the raised part 9 is inserted into the groove 601 at the root of the upper raised platform 6. The raised part 9 raises the groove, causing the upper raised platform 6 to tilt downward. The upper curved part is disengaged from the upper mounting groove 4.

[0030] Above the raised portion 9 is a pressing portion 10 for easy installation. Pressing the pressing portion allows the lower end to be raised so that the upper bending portion 301 can be detached.

[0031] The lower end of the upper protruding platform 6 is inclined upwards, and the upper end of the lower protruding platform 7 is inclined downwards.

[0032] A horizontal support member 11 is provided between the upper protruding platform 6 and the limiting member 8. The support member 11 is located in the concave structure of the connecting piece 3 and is used to push against the connecting piece 3 when the relay plate 2 is deformed by force.

[0033] The relay plate 2 has upper mounting grooves 4 and lower mounting grooves 5 on both the left and right ends of its back for the upper bending part 301 and the lower bending part 302 to fit together.

[0034] During installation and use, first insert the lower bent part 302 into the lower mounting groove 5 along the inclined surface, and then insert the upper bent part 301 into the upper mounting groove 4 along the inclined surface. This allows for quick installation.

[0035] During disassembly, the relay plate 2 can be directly removed after the upper bending part 301 is disengaged by pressing the pressing part 10, which is convenient and quick.

[0036] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A PLC relay controller for a water turbine speed governor, comprising a controller body and a relay board, characterized in that, The controller body has a concave connecting piece, and the upper and lower ends of the connecting piece are vertically arranged upper and lower bending parts. The back of the relay plate has an upper mounting groove and a lower mounting groove that respectively fit with the upper and lower bending parts. The connecting piece fixes the relay plate in the controller body.

2. The PLC relay controller for a turbine speed governor according to claim 1, characterized in that: The upper mounting groove is vertically disposed on the lower end face of the upper protruding platform, and the lower mounting groove is vertically disposed on the upper end face of the lower protruding platform. The distance between the upper bend and the lower bend is less than the distance between the upper mounting groove and the lower mounting groove.

3. The PLC relay controller for a turbine speed governor according to claim 2, characterized in that: A limiting member is provided above the lower protruding platform, and a space is provided between the limiting member and the lower protruding platform for the lower end of the connecting piece to enter the lower mounting groove.

4. The PLC relay controller for a turbine speed governor according to claim 3, characterized in that: The height of the space is less than the length of the lower bend.

5. The PLC relay controller for a turbine speed governor according to claim 4, characterized in that: The upper raised platform is provided with a raised part, one end of which is inserted into the groove at the root of the upper raised platform. The raised part raises the groove, causing the upper raised platform to tilt downward, and the upper curved part disengages from the upper mounting groove.

6. The PLC relay controller for a turbine speed governor according to claim 5, characterized in that: The lower end of the upper protruding platform is inclined upwards, and the upper end of the lower protruding platform is inclined downwards.

7. The PLC relay controller for a turbine speed governor according to claim 6, characterized in that: A support member is provided between the upper protruding platform and the limiting member, and the support member is located within the concave structure of the connecting piece.

8. The PLC relay controller for a turbine speed governor according to claim 7, characterized in that: The left and right ends of the back of the relay plate are provided with upper and lower mounting grooves for the upper and lower bending parts to fit together.

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