Anti-interference PLC data safety protection device

Abstract

The utility model discloses an anti-interference PLC data safety protection device, which belongs to the technical field of PLC safety protection, and comprises a protection device main body, the inner side of the protection device main body is provided with a mounting rack, the inner side of the mounting rack is provided with a support cross bar, and the surface of the support cross bar is provided with uniform wire through holes; the U-shaped limiting grooves are uniformly and symmetrically formed in the surfaces of the three wiring cross rods and the three wiring pressing rods, and the opening rubber rings are arranged on the inner sides of the U-shaped limiting grooves, so that an analog signal cable and a direct-current signal cable are separately arranged on the same alternating-current signal cable, and wiring installation is rapid and stable; mutual interference and noise among different types of signals are reduced, a shielding cable main body introduced into the protection device main body is connected to a ground wire access end, penetrates through a wire through hole formed in the surface of a supporting cross rod and then is grounded, a signal isolator access end enables a wiring terminal not to be directly connected with equipment, and separated wiring ensures the stability and reliability of a PLC (Programmable Logic Controller).

Description

Technical Field

[0001] The utility model relates to the technical field of PLC safety protection, in particular to an anti-interference PLC data safety protection device. Background Art

[0002] In harsh industrial environments, a large amount of high and low frequency interference may be connected to the PLC of field equipment through cables, affecting the safety and stability of the PLC. The analog signal using double-layer shielded cable is less affected by external interference. High-speed pulse signals should use shielded cables to prevent external interference and interference with low-level signals. These cables can effectively prevent high-frequency signal interference, thereby ensuring the stability of the PLC.

[0003] In order to separate the analog signal cable and the DC signal cable on the same AC signal cable, and reduce the mutual interference and noise between different types of signals, the shielded cable introduced into the control cabinet must be grounded and must not be directly connected to the equipment through the terminal block. Therefore, the wiring must be separated and stable. For this reason, we propose an anti-interference PLC data security protection device. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, the utility model provides an anti-interference PLC data security protection device, which has U-shaped limit grooves evenly and symmetrically opened on the surfaces of three wiring cross bars and three wiring pressure bars, and an open rubber ring is provided on the inner side of the U-shaped limit groove, so that analog signal cables and DC signal cables on the same AC signal cable can be separately wired, so that the wiring installation is quick and stable, and the mutual interference and noise between different types of signals are reduced. The shielded cable body introduced into the protection device body is connected to the ground wire access end and then grounded after passing through the wire hole opened on the surface of the supporting cross bar. By providing a signal isolator access end, the wiring terminal is not directly connected to the equipment, and the wiring is separated to ensure the stability and reliability of the PLC.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: an anti-interference PLC data security protection device, comprising a protection device body, a mounting frame is arranged inside the protection device body, a supporting cross bar is arranged inside the mounting frame, uniform wire holes are opened on the surface of the supporting cross bar, four mounting rails are arranged inside the mounting frame, a network access terminal is arranged on the surface of one of the mounting rails, a PLC system access terminal is arranged on one side of the network access terminal, a power supply access terminal is arranged on one side of the PLC system access terminal, a wiring cross bar is arranged at the bottom of the power supply access terminal, and the The surface of the wiring crossbar is evenly provided with U-shaped limit grooves, an open rubber ring is provided on the inner side of the U-shaped limit groove, a shielded cable body is provided on the inner side of the open rubber ring, and limit blocks are provided at both ends of the wiring crossbar, one of the limit blocks is provided with a hinge on one side surface, a wiring pressure rod is provided at one end of the hinge, a U-shaped limit groove is provided on the inner side of the wiring pressure rod, the wiring pressure rod corresponds to the U-shaped limit groove provided on the surface of the wiring crossbar, and a spring buckle is provided at the other end of the wiring pressure rod, wherein a limit card slot is provided on one side of the other limit block, and the spring buckle is clamped with the limit card slot.

[0006] As a preferred technical solution of the utility model, a slide groove fixing block is provided on the inner wall of the protection device body, rollers are provided on both side surfaces of the mounting frame, the rollers are located on the inner side of the slide groove fixing block, a flame retardant protection door is provided on the surface of the protection device body, a pressure block is provided on the inner side of the flame retardant protection door, and the pressure block corresponds to the position of the supporting cross bar provided on the inner side of the mounting frame.

[0007] As a preferred technical solution of the utility model, three wiring cross bars are provided, and U-shaped limit grooves are provided on the surfaces of the three wiring cross bars. Four mounting guide rails are provided, and a signal isolator access end is provided on the surface of one of the mounting guide rails. Shielded cable bodies are provided at both ends of the signal isolator access end, and the shielded cable bodies are located on the inner side of the U-shaped limit grooves provided on the surface of the wiring cross bar.

[0008] As a preferred technical solution of the utility model, a ground wire access end is provided on the surface of one of the mounting rails, and the ground wire access end is fixedly connected to the shielded cable body, and the shielded cable body is located inside the wire hole opened on the surface of the supporting crossbar.

[0009] As a preferred technical solution of the utility model, a dehumidification and heat dissipation fan is arranged at the top inner side of the protection device body, and heat dissipation holes are arranged on the surface of the flame-retardant protection door.

[0010] As a preferred technical solution of the utility model, a signal display screen is arranged on the surface of the flame retardant protective door, and a safety lock is arranged on one side surface of the flame retardant protective door.

[0011] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0012] 1. U-shaped limit grooves are evenly and symmetrically opened on the surfaces of three wiring cross bars and three wiring pressure bars, and open rubber rings are arranged on the inner side of the U-shaped limit grooves, so that the analog signal cables and DC signal cables on the same AC signal cable can be separately wired, making the wiring installation quick and stable, and reducing the mutual interference and noise between different types of signals. The shielded cable body introduced into the protection device body is connected to the ground wire access end and then grounded after passing through the wire hole opened on the surface of the supporting cross bar. By setting the signal isolator access end, the wiring terminal is not directly connected to the equipment, and the wiring is separated to ensure the stability and reliability of the PLC.

[0013] 2. The combination of the slide fixing block and the roller makes it more convenient for personnel to install and wire. The combination of the pressure block and the supporting cross bar makes the mounting frame limit clamped when the flame-retardant protective door is closed. The combination of the ground wire access terminal and the wire hole opened on the surface of the supporting cross bar makes the ground wires separately wired, effectively avoiding mutual interference between the ground wires. The combination of the dehumidification and cooling fan and the heat dissipation hole makes the main body of the protection device cool and dehumidify, making the wiring of the internal components dry and ventilated to avoid short circuits. The safety lock makes the main body of the protection device safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0015] Figure 2 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0016] Figure 3 For the utility model Figure 1 The enlarged structural diagram at B in the middle;

[0017] Among them: 1. Protection device body; 2. Mounting frame; 3. Flame retardant protection door; 4. Pressure block; 5. Support cross bar; 6. Slide fixing block; 7. Roller; 8. Heat dissipation hole; 9. Dehumidification and cooling fan; 10. PLC system access terminal; 11. Power access terminal; 12. Network access terminal; 13. Signal isolator access terminal; 14. Wiring cross bar; 15. Wiring pressure bar; 16. Mounting rail; 17. Limit block; 18. Hinge; 19. U-shaped limit groove; 20. Open rubber ring; 21. Shielded cable body. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, purpose and efficacy of the utility model easy to understand, the utility model is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the utility model. The experimental methods in the following embodiments are conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0019] Embodiment:

[0020] like Figure 1 , Figure 2 , Figure 3 As shown, the anti-interference PLC data security protection device includes a protection device body 1, a mounting frame 2 is arranged inside the protection device body 1, a support cross bar 5 is arranged inside the mounting frame 2, and the surface of the support cross bar 5 is uniformly provided with wire holes, and four mounting rails 16 are arranged inside the mounting frame 2, and a network access terminal 12 is arranged on the surface of one of the mounting rails 16, a PLC system access terminal 10 is arranged on one side of the network access terminal 12, a power supply access terminal 11 is arranged on one side of the PLC system access terminal 10, and a wiring cross bar 14 is arranged at the bottom of the power supply access terminal 11, and the surface of the wiring cross bar 14 is uniformly provided with U A U-shaped limiting groove 19 is provided, an open rubber ring 20 is provided inside the U-shaped limiting groove 19, a shielded cable body 21 is provided inside the open rubber ring 20, limiting blocks 17 are provided at both ends of the wiring cross bar 14, a hinge 18 is provided on one side surface of one limiting block 17, a wiring pressure rod 15 is provided at one end of the hinge 18, a U-shaped limiting groove 19 is provided inside the wiring pressure rod 15, the wiring pressure rod 15 corresponds to the U-shaped limiting groove 19 provided on the surface of the wiring cross bar 14, a spring buckle is provided at the other end of the wiring pressure rod 15, a limiting card slot is provided on one side of another limiting block 17, and the spring buckle is clamped with the limiting card slot.

[0021] In harsh industrial environments, a large amount of high and low frequency interference may be connected to the PLC of field equipment through cables, affecting the safety and stability of the PLC. The analog signal using double-layer shielded cables is less susceptible to external interference. High-speed pulse signals should use shielded cables to prevent external interference and interference with low-level signals. These cables can effectively prevent high-frequency signal interference, thereby ensuring the stability of the PLC. By evenly and symmetrically opening U-shaped limit grooves 19 on the surfaces of three wiring crossbars 14 and three wiring pressure bars 15, an open rubber ring 20 is provided on the inner side of the U-shaped limit groove 19, so that the analog signal cable and the DC signal cable are separately wired on the same AC signal cable, making the wiring installation quick and stable, and reducing the mutual interference and noise between different types of signals. The shielded cable body 21 introduced into the protection device body 1 is connected to the ground wire access end through the wire hole opened on the surface of the support crossbar 5 and then grounded. By setting the signal isolator access end 13, the wiring terminal is not directly connected to the equipment, and the wiring is separated to ensure the stability and reliability of the PLC.

[0022] In other embodiments, the present embodiment discloses that a slide groove fixing block 6 is provided on the inner wall of the protection device body 1, rollers 7 are provided on the two side surfaces of the mounting frame 2, the rollers 7 are located on the inner side of the slide groove fixing block 6, a flame retardant protective door 3 is provided on the surface of the protection device body 1, a pressure block 4 is provided on the inner side of the flame retardant protective door 3, and the pressure block 4 corresponds to the position of the supporting cross bar 5 provided on the inner side of the mounting frame 2; by the combination of the slide groove fixing block 6 and the roller 7, it is more convenient for personnel to install and wire; by the combination of the pressure block 4 and the supporting cross bar 5, the mounting frame 2 is limited and clamped when the flame retardant protective door 3 is closed.

[0023] In other embodiments, the present embodiment discloses that three wiring cross bars 14 are provided, and U-shaped limit grooves 19 are opened on the surfaces of the three wiring cross bars 14. Four wiring cross bars 14 are provided, and a signal isolator access terminal 13 is provided on the surface of one mounting rail 16. Shielded cable bodies 21 are provided at both ends of the signal isolator access terminal 13, and the shielded cable bodies 21 are located on the inner side of the U-shaped limit grooves 19 opened on the surface of the wiring cross bar 14. By setting the signal isolator access terminal 13, the wiring terminal is not directly connected to the device, and interference is shielded by the signal isolator access terminal 13.

[0024] In other embodiments, the present embodiment discloses that a ground wire access terminal is provided on the surface of one of the mounting rails 16, and the ground wire access terminal is fixedly connected to the shielded cable body 21, and the shielded cable body 21 is located on the inner side of the wire through hole opened on the surface of the supporting cross bar 5; by matching the ground wire access terminal with the wire through hole opened on the surface of the supporting cross bar 5, the ground wires are wired separately, thereby effectively avoiding mutual interference between the ground wires.

[0025] In other embodiments, this embodiment discloses that a dehumidification and heat dissipation fan 9 is provided at the top inner side of the protection device body 1, and heat dissipation holes 8 are provided on the surface of the flame retardant protection door 3; by the combination of the dehumidification and heat dissipation fan 9 and the heat dissipation holes 8; the protection device body 1 can be cooled and dehumidified, so that the wiring of the internal components is dry and ventilated, thereby avoiding the occurrence of line short circuit.

[0026] In other embodiments, this embodiment discloses that a signal display screen is provided on the surface of the flame retardant protective door 3, and a safety lock is provided on one side surface of the flame retardant protective door 3; by providing the safety lock, the protection device body 1 is made safer and more reliable.

[0027] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An anti-interference PLC data security protection device, comprising a protection device body (1), characterized in that: A mounting frame (2) is arranged inside the protection device body (1), a supporting cross bar (5) is arranged inside the mounting frame (2), and the surface of the supporting cross bar (5) is provided with uniform wire holes, and four mounting guide rails (16) are arranged inside the mounting frame (2), and a network access terminal (12) is arranged on the surface of one of the mounting guide rails (16), and a PLC system access terminal (10) is arranged on one side of the network access terminal (12), and a power supply access terminal (11) is arranged on one side of the PLC system access terminal (10), and a wiring cross bar (14) is arranged at the bottom end of the power supply access terminal (11), and the surface of the wiring cross bar (14) is uniformly provided with U-shaped limit grooves (19), and the U-shaped limit grooves ( 19) is provided with an open rubber ring (20) on the inner side, a shielded cable body (21) is provided on the inner side of the open rubber ring (20), and limiting blocks (17) are provided at both ends of the wiring crossbar (14), one of the limiting blocks (17) is provided with a hinge (18) on one side surface, and a wiring pressure rod (15) is provided at one end of the hinge (18), and a U-shaped limiting groove (19) is provided on the inner side of the wiring pressure rod (15), and the wiring pressure rod (15) corresponds to the U-shaped limiting groove (19) provided on the surface of the wiring crossbar (14), and a spring buckle is provided at the other end of the wiring pressure rod (15), and a limiting card slot is provided on one side of another limiting block (17), and the spring buckle is engaged with the limiting card slot.

2. The anti-interference PLC data security protection device according to claim 1 is characterized in that: The inner wall of the protection device body (1) is provided with a slide groove fixing block (6), the surfaces of both sides of the mounting frame (2) are provided with rollers (7), the rollers (7) are located inside the slide groove fixing block (6), the surface of the protection device body (1) is provided with a flame retardant protection door (3), the inner side of the flame retardant protection door (3) is provided with a pressure block (4), the pressure block (4) corresponds to the position of a support cross bar (5) provided inside the mounting frame (2).

3. The anti-interference PLC data security protection device according to claim 1 is characterized in that: Three wiring cross bars (14) are provided, and the surfaces of the three wiring cross bars (14) are all provided with U-shaped limit grooves (19). Four mounting rails (16) are provided, and the surface of one of the mounting rails (16) is provided with a signal isolator access end (13). Shielded cable bodies (21) are provided at both ends of the signal isolator access end (13), and the shielded cable bodies (21) are all located inside the U-shaped limit grooves (19) provided on the surface of the wiring cross bar (14).

4. The anti-interference PLC data security protection device according to claim 1 is characterized in that: A ground wire access end is provided on the surface of one of the mounting rails (16), and the ground wire access end is fixedly connected to a shielded cable body (21), and the shielded cable body (21) is located inside a wire hole provided on the surface of the supporting crossbar (5).

5. The anti-interference PLC data security protection device according to claim 2 is characterized in that: A dehumidification and heat dissipation fan (9) is provided at the top inner side of the protection device body (1), and heat dissipation holes (8) are provided on the surface of the flame-retardant protection door (3).

6. The anti-interference PLC data security protection device according to claim 2 is characterized in that: A signal display screen is provided on the surface of the flame retardant protective door (3), and a safety lock is provided on one side surface of the flame retardant protective door (3).

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