Safety relay

Abstract

The utility model relates to the technical field of safety relays, in particular to a safety relay which comprises a safety relay body which is clamped on the left side of a base and adopts FDW design, cavities are formed in the upper end and the lower end of the left side of the base, one end of each cavity is fixedly connected with a fixing rod, and the middle end of the outer surface of each fixing rod is movably connected with a positioning piece. And a clamping part is arranged at the left end of the positioning piece. Through cooperation of the structures, the safety relay has the advantage of being convenient to disassemble, the problem that an existing safety relay is inconvenient to use due to the narrow space after the base is installed in a power distribution cabinet is solved, meanwhile, the safety relay body is designed through an FDW circuit, and the safety relay is convenient to disassemble. The two wiring modes of the loop load can be flexibly realized without additionally arranging wiring terminals, the design difficulty of the cabinet is effectively saved, the occupied space of the cabinet is reduced, and the loop fault points are reduced.

Description

Technical Field

[0001] This utility model relates to the field of safety relay technology, specifically a safety relay. Background Technology

[0002] A safety relay is a type of relay specifically designed to improve safety in industrial or machine environments. Its main difference from a regular relay lies in its built-in self-monitoring function and fault detection capability. This allows the safety relay to initiate a reliable response when an error is detected, ensuring the safe operation of the equipment.

[0003] Currently, safety relays are typically installed in distribution cabinets via a base. However, existing safety relays are often connected and positioned using a snap-fit ​​method due to the limited space inside the cabinet. When disassembly is required later, the confined space often necessitates using tools to pry up the snap-fit ​​component to detach the safety relay. This process can easily damage the snap-fit ​​component, leading to unstable positioning when reconnected. Therefore, we propose a new type of safety relay. Utility Model Content

[0004] The purpose of this utility model is to provide a safety relay with the advantage of easy disassembly. It solves the problem that existing safety relays are mostly connected and positioned by snap-fit ​​after being installed in the power distribution cabinet due to the narrow space. When disassembly is required later, due to the limited space, the only way to remove the safety relay is to pry up the snap-fit ​​part with a tool. This operation can easily damage the snap-fit ​​part, resulting in unstable positioning when snapped back on.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a safety relay, comprising a safety relay body with an FDW design that is snapped onto the left side of a base. Cavities are provided at both the upper and lower ends of the left side of the base. A fixing rod is fixedly connected to one end of each cavity. A positioning member is movably connected to the middle of the outer surface of the fixing rod. A snap-fit ​​portion is provided at the left end of the positioning member. Torsion springs sleeved on the outside of the fixing rod are fixedly connected between the front and rear sides of the right end of the positioning member and the inner wall of the cavity. Guide rail grooves are provided on both the front and rear sides of the positioning member. A guide pin is slidably connected to the inner side of the guide rail groove. A movable rod is fixedly connected to one side of the guide pin. A connecting frame is fixedly connected to the left side of the movable rod. A pull rod is fixedly connected to the middle of the left side of the connecting frame. Positioning slots are provided at the top and bottom of the right end of the safety relay body.

[0006] Preferably, the longitudinal section of the positioning slot is a right triangle, and one end of the locking part is adapted to the positioning slot.

[0007] Preferably, the guide rail groove is inclined, and the inclination angle of the guide rail groove is between five and fifty-five degrees.

[0008] Preferably, the connecting frame is located on the outside of the safety relay body.

[0009] Preferably, a pull block is fixedly connected to the left side of the pull rod, and the outer surface of the pull block is provided with anti-slip particles.

[0010] Preferably, the positioning element is made of polycarbonate.

[0011] Preferably, the guide pin is made of nylon.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model uses a pull rod to move the connecting frame away from the base. When the connecting frame moves, it will drive the movable rod and the guide pin to move. When the guide pin slides in the inclined guide rail groove, it can drive the locking part to exit the corresponding positioning slot through the positioning component. The movement of the positioning component will cause the torsion spring to contract again. At this time, the safety relay body can be directly driven to the base. No tools are needed during the disassembly process, and it is convenient and quick to use.

[0014] 2. The present invention facilitates the operation of the lever by setting up a pull block. Attached Figure Description

[0015] Figure 1 This is a first-view structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the second-view structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the third-view cross-sectional structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the mating structure of the positioning component and the movable rod of this utility model;

[0019] Figure 5 This is the FDW circuit diagram of this utility model;

[0020] Figure 6 This is a circuit diagram of the dry node in normal energized state according to this utility model;

[0021] Figure 7 This is a circuit diagram of the dry node in the safe power-off state of this utility model;

[0022] Figure 8 This is a circuit diagram of the safe power-off state of the wet node of this utility model;

[0023] Figure 9 This is a circuit diagram of the normal energized state of the wet node of this utility model.

[0024] In the diagram: 1. Base; 2. Safety relay body; 3. Positioning component; 4. Connecting frame; 5. Pull block; 6. Pull rod; 7. Movable rod; 8. Cavity; 9. Fixed rod; 10. Snap-fit ​​part; 11. Positioning slot; 12. Guide rail groove; 13. Torsion spring; 14. Guide pin. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The base 1, safety relay body 2, positioning component 3, connecting frame 4, pull block 5, pull rod 6, movable rod 7, cavity 8, fixing rod 9, snap-fit ​​part 10, positioning slot 11, guide rail slot 12, torsion spring 13, and guide pin 14 of this application are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0029] Example 1

[0030] Please see Figures 1-9 As shown, this utility model provides a technical solution: a safety relay, including a safety relay body 2 that is snapped onto the left side of a base 1 and adopts an FDW design. Cavities 8 are provided at both the upper and lower ends of the left side of the base 1. A fixing rod 9 is fixedly connected to one end of each cavity 8. A positioning member 3 is movably connected to the middle of the outer surface of the fixing rod 9. The positioning member 3 is made of polycarbonate. A snap-fit ​​part 10 is provided at the left end of the positioning member 3. Torsion springs 13, sleeved on the outside of the fixing rod 9, are fixedly connected between the front and rear sides of the right end of the positioning member 3 and the inner wall of the cavity 8. Guide rail grooves 12 are provided on both the front and rear sides of the positioning member 3. The groove 12 is inclined, and the inclination angle of the guide rail groove 12 is between five and fifty-five degrees. A guide pin 14 is slidably connected to the inner side of the guide rail groove 12. The guide pin 14 is made of nylon. A movable rod 7 is fixedly connected to one side of the guide pin 14. A connecting frame 4 is fixedly connected to the left side of the movable rod 7. The connecting frame 4 is located on the outside of the safety relay body 2. A pull rod 6 is fixedly connected to the middle of the left side of the connecting frame 4. Positioning slots 11 are provided at the top and bottom of the right end of the safety relay body 2. The longitudinal section of the positioning slot 11 is a right triangle, and one end of the locking part 10 is adapted to the positioning slot 11.

[0031] This technical solution: With the base 1 in place, when the safety relay body 2 passes through the connecting frame 4 and approaches the base 1, the right end of the safety relay body 2 will press against the locking part 10. This causes the locking part 10 to cause the positioning member 3 to rotate outwards around the fixing rod 9. During this rotation, the torsion spring 13 will contract. After the safety relay body 2 is fully in contact with the base 1, the contracted torsion spring 13 will cause the positioning member 3 to rotate in the opposite direction. The rotated positioning member 3 will then cause the locking part 10 to engage with the corresponding positioning slot 11, thus achieving proper connection between the base 1 and the safety relay body 2. The quick connection and positioning mechanism allows for easy disassembly of the safety relay body 2 within a narrow distribution cabinet. The pull rod 6 moves the connecting frame 4 away from the base 1, causing the movable rod 7 and guide pin 14 to move. When the guide pin 14 slides along the inclined guide rail groove 12, it can drive the locking part 10 out of the corresponding positioning slot 11 via the positioning component 3. The movement of the positioning component 3 will again cause the torsion spring 13 to contract, allowing the safety relay body 2 to be directly connected to the base 1. Disassembly requires no tools and is convenient and quick to use.

[0032] It should be noted that the safety relay is a control module that realizes the isolation function between input and output signals. The contact circuit load is divided into two types: dry and wet. The main body of this safety relay 2, through FDW circuit design, realizes the two wiring methods of the circuit load without the need to add additional wiring terminals, effectively saving cabinet design difficulty, reducing cabinet space occupation, and reducing circuit failure points.

[0033] Detailed Analysis of FDW Design Using RS401 as an Example

[0034] The RS2401 is a high-reliability safety relay control module based on quadruple isolation between input and output signals. It provides one normally open (NO) contact, and the relays adopt redundancy technology of parallel connection followed by series connection and contact welding protection technology. The output contact capacity reaches 5A. It has a unique FDW design and is compatible with dry and wet node connections without the need for additional external terminals.

[0035] like Figure 5 As shown, terminals 6 and 14 in RS2401 are auxiliary terminals for FDW design. Through the internal circuit design of the relay, terminals 6 and 14 are shorted.

[0036] When using dry nodes:

[0037] like Figure 6-7 As shown, the normally open output signal of SIL3 is connected to terminals 5 and 13.

[0038] When operating at wet joints:

[0039] like Figure 8-9 As shown, terminal 5 is connected to the positive terminal of the output circuit power supply, terminal 6 is connected to the negative terminal of the power supply, and terminals 13 and 14 are connected to the positive and negative terminals of the external load, respectively.

[0040] Example 2

[0041] Based on Embodiment 1, this utility model is as follows: Figures 1-4 As shown, a pull block 5 is fixedly connected to the left side of the pull rod 6, and the outer surface of the pull block 5 is provided with anti-slip particles.

[0042] This technical solution: By setting up the pull block 5, it is convenient for staff to operate the pull rod 6.

[0043] It should be noted that the pull block 5 can be L-shaped, arc-shaped, hook-shaped, etc.

[0044] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0045] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A safety relay comprising a safety relay body (2) of the FDW design, which is clamped to the left side of a base (1), characterized in that: The left side of the base (1) is provided with cavities (8) at the upper and lower ends, one end of the cavity (8) is fixedly connected with a fixed rod (9), the outer surface of the fixed rod (9) is movably connected with a positioning piece (3), the left end of the positioning piece (3) is provided with a clamping part (10), the front and back sides of the right end of the positioning piece (3) and the inner wall of the cavity (8) are fixedly connected with torsion springs (13) sleeved on the outer side of the fixed rod (9), the front and back sides of the positioning piece (3) are provided with guide rail grooves (12), the inner side of the guide rail groove (12) is slidably connected with a guide pin rod (14), one side of the guide pin rod (14) is fixedly connected with a movable rod (7), the left side of the movable rod (7) is fixedly connected with a connecting frame (4), the left side of the middle end of the connecting frame (4) is fixedly connected with a pull rod (6), the top and bottom of the right end of the safety relay body (2) are provided with positioning clamping grooves (11).

2. A safety relay according to claim 1, characterized in that: The longitudinal section of the positioning clamping groove (11) is a right triangle, and one end of the clamping part (10) is matched with the positioning clamping groove (11).

3. A safety relay according to claim 1, characterized in that: The guide rail groove (12) is inclined, and the inclination angle of the guide rail groove (12) is between five and fifty-five degrees.

4. A safety relay according to claim 1, characterized in that: The connecting frame (4) is located on the outer side of the safety relay body (2).

5. A safety relay according to claim 1, characterized in that: The left side of the pull rod (6) is fixedly connected with a pull block (5), and the outer surface of the pull block (5) is provided with anti-skid particles.

6. A safety relay according to claim 1, characterized in that: The material of the positioning piece (3) is polycarbonate.

7. A safety relay according to claim 1, characterized in that: The material of the guide pin rod (14) is nylon.

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