Lightning protection delay protection device

Abstract

The utility model discloses a lightning protection time-delay protection device, which effectively realizes the function of load time-delay protection, and comprises a protection cabinet and a lightning protection time-delay protection system, the lower part of the protection cabinet is provided with fixing blocks, and each fixing block is internally provided with a locking mechanism; the lightning protection delay protection system comprises an uninterruptible power supply module used for providing stable power supply output for a load; the alternating current contactor is used for controlling the on-off of the output of the uninterruptible power supply module to a load; the voltage transmitter is used for detecting the change of the incoming line voltage and converting a voltage signal into an electric signal; and the PLC controller is used for processing and sending a signal between the uninterruptible power supply system and the alternating current contactor. The lightning protection device is novel in structure, ingenious in conception and simple and convenient to operate, and effectively increases the function of lightning protection on a load and an internal circuit.

Description

Technical Field

[0001] The utility model belongs to the technical field of lightning protection, and relates to a lightning protection delay protection device. Background Technique

[0002] We should have sufficient understanding and attention to lightning protection work. Building a stable and reliable lightning protection system is particularly important for ensuring the safety of buildings and power distribution systems. In the electrical control industry, it is also particularly important to do a good job in lightning protection measures for distribution cabinets. During lightning weather, lightning strikes will affect the voltage of the factory's input cables and cause fluctuations. When the voltage fluctuations are large, it will damage the load electrical appliances. Therefore, a lightning protection delay protection device is needed to protect the electrical appliances. In addition, since the lightning protection delay protection device is generally installed in the electrical cabinet, it is inevitable to debug or fine-tune its installation position during the installation process of the electrical cabinet. At present, expansion bolts are generally directly used to fix the electrical cabinet on the ground. When the position needs to be fine-tuned, it is necessary to repeat drilling on the ground for re-fixing, which is very inconvenient and affects the aesthetics of the subsequent factory. In addition, the fixing structure of the electrical cabinet can also be used for the overall grounding and conduction of the electrical cabinet. Therefore, a lightning protection delay protection device that can conveniently adjust the installation position is needed to solve the above problems. Summary of the Invention

[0003] In view of the above problems, the utility model proposes a lightning protection delay protection device, which well solves the problems in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A lightning protection delay protection device includes a lightning protection delay protection system arranged in a protection cabinet. On the left and right sides of the lower part of the protection cabinet, there is a fixed block that can move back and forth. Inside each fixed block, there are multiple locking mechanisms for limiting the fixed block. The upper side of the fixed block is fixedly connected with a shielding cloth;

[0006] The lightning protection delay protection system includes:

[0007] A surge protector for conducting and shunting current;

[0008] An uninterruptible power supply module for providing a stable power output to the load;

[0009] An AC contactor for controlling the on and off of the output of the uninterruptible power supply module to the load;

[0010] A voltage transmitter for detecting the change of the incoming line voltage and converting the voltage signal into an electrical signal;

[0011] A PLC controller for processing and sending signals between the uninterruptible power supply module and the AC contactor.

[0012] Preferably, the fixing block includes a convex block and a trapezoidal block. A convex groove adapted to the convex block is provided on each of the left and right sides of the lower part of the protection cabinet. Each convex block can slide back and forth along the corresponding convex groove, and each trapezoidal block is fixedly connected to the side of the corresponding convex block away from the convex groove.

[0013] Preferably, the locking mechanism includes a rotating frame. A locking block that can slide left and right along the convex block is connected to each of the upper and lower sides of the rotating frame. A rotating shaft is fixedly connected to the middle of the rotating frame. The rotating frame is rotationally connected to the convex block through the rotating shaft. A connecting plate is fixedly connected to one side of the rotating shaft close to the trapezoidal block. A toggle plate is slidably connected to the end of the connecting plate away from the rotating shaft. A pressing sleeve is fixedly connected to the middle of each toggle plate. The pressing sleeve, the toggle plate and the connecting plate cooperate with each other to form a structure for the rotation of the rotating frame.

[0014] Preferably, a first chute is provided at each of the upper and lower ends of the rotating frame. A first sliding rod is fixedly connected to one side of each locking block close to the first chute. Each locking block is slidably connected to the first chute through the first sliding rod. A second chute is provided on one side of the connecting plate close to the toggle plate. A second sliding rod is fixedly connected to one side of the toggle plate close to the second chute. The second sliding rod is slidably connected to the second chute.

[0015] Preferably, a return spring is provided on one side of each locking block close to the rotating shaft, and a plurality of rubber blocks are fixedly connected to one side of each locking block away from the first sliding rod.

[0016] Preferably, a first protection door is rotatably connected to the front side of the protection cabinet, and a second protection door rotatably connected to the protection cabinet is provided below the first protection door.

[0017] Preferably, the lightning protection delay protection system further includes a power switch for controlling the opening and closing of the uninterruptible power supply module, and a timing module is built in the PLC controller.

[0018] Compared with the prior art, the present utility model has the following beneficial effects:

[0019] 1. The utility model has a surge protector and a PLC controller. The PLC controller has a built-in timing module. When the voltage is found to be lower than the preset alarm value, the timing module is used to count. If the voltage abnormality lasts for more than the preset time limit (1s-2.0s), it is determined to be a power supply problem of the power grid. The PLC controller will control the AC contactor to cut off the power supply to protect the equipment from damage. If the voltage returns to normal within the preset time, the uninterruptible power supply module will automatically stabilize the voltage, the PLC controller will eliminate the fault state, and the equipment will continue to operate normally. In addition, the PLC controller will also record the voltage abnormality event for subsequent analysis and maintenance;

[0020] 2. The utility model has convex blocks and trapezoidal blocks made of conductive materials, which can always keep the protection cabinet in a grounded state. By fixing the trapezoidal blocks with bolts, the grounding area can be further increased, thereby increasing the grounding safety of the protection cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 It is a structural schematic diagram of the fixing block in the utility model.

[0023] Figure 3 It is a schematic diagram of the position of the locking mechanism in the utility model.

[0024] Figure 4 It is a structural schematic diagram of the locking mechanism in the utility model.

[0025] Figure 5 It is a connection diagram of the lightning protection delay protection system in the utility model.

[0026] In the figure: 1. protective cabinet; 2. lightning protection delay protection system; 3. fixing block; 4. locking mechanism; 5. shielding cloth; 6. uninterruptible power supply module; 7. AC contactor; 8. voltage transmitter; 9. PLC controller; 10. power switch; 11. timing module; 12. convex block; 13. trapezoidal block; 14. convex groove; 15. rotating frame; 16. locking block; 17. rotating shaft; 18. connecting plate; 19. toggle plate; 20. clamping sleeve; 21. first slide groove; 22. first slide rod; 23. second slide groove; 24. second slide rod; 25. reset spring; 26. rubber block; 27. first protective door; 28. second protective door; 29. surge protector. DETAILED DESCRIPTION

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0028] Next, in conjunction with the attached Figures 1 - 5 A further detailed description will be given of the specific implementation manners of the present utility model.

[0029] As Figures 1 - 5 shown, the lightning protection and delay protection system 2 provided in the protection cabinet 1 of the present utility model. In order to facilitate the fixation of the protection cabinet 1, a movable fixing block 3 is provided on each of the left and right sides of the lower part of the protection cabinet 1. A plurality of locking mechanisms 4 for limiting the fixing block 3 are provided inside each fixing block 3. A shielding cloth 5 is fixedly connected to the upper side of the fixing block 3;

[0030] The lightning protection and delay protection system 2 includes:

[0031] A surge protector 29 for conducting and shunting the current;

[0032] An uninterruptible power supply module 6 for providing a stable power output to the load, with a built-in filter circuit and a voltage stabilizing circuit;

[0033] An AC contactor 7 for controlling the on and off of the output of the uninterruptible power supply module 6 to the load;

[0034] A voltage transmitter 8 for detecting the change of the incoming line voltage and converting the voltage signal into an electrical signal. The surge protector 29 is connected to the input end of the voltage transmitter 8;

[0035] A PLC controller 9 for processing and sending signals between the uninterruptible power supply module 6 and the AC contactor 7;

[0036] It should be noted that the main function of the surge protector 29 is to protect equipment from lightning strikes or electrical surges in an electrical system. When a lightning strike occurs, a huge current and voltage will be generated. When these current and voltage pass through the surge protector 29, the surge protector 29 will quickly respond and limit the excessive voltage within the range that the equipment can withstand, thereby protecting the equipment from damage;

[0037] The main function of the uninterruptible power supply module 6 is to provide temporary power when the power supply is interrupted to ensure that the equipment can continue to operate. When a lightning strike occurs, it may cause unstable or interrupted power supply. The uninterruptible power supply module 6 can provide a short-term power supply to ensure that the equipment will not be damaged due to sudden power failure;

[0038] The AC contactor 7 is used to control the start and stop of the load; it can automatically cut off the power supply when lightning strikes to protect the equipment from damage;

[0039] The voltage transmitter 8 is mainly used to convert high voltage into low voltage for measurement and monitoring. During lightning protection, the voltage transmitter can be used as a monitoring device to continuously monitor the voltage level. When an abnormal voltage is detected, it can issue a warning or trigger a protection measure.

[0040] During use, the position of the fixed block 3 can be moved back and forth to facilitate the staff to fix the protection cabinet 1, and the fixed block 3 and the protection cabinet 1 are fixed through the locking mechanism 4. When the device is running and the grid voltage is stable, the uninterruptible power supply module 6 (USP) provides a stable low-voltage control power supply for the lightning protection delay protection system 2 through filtering and voltage regulation. During this period, the voltage transmitter 8 continuously monitors the incoming line voltage. Once it is found that the voltage is lower than the preset alarm value, the PLC controller 9 will immediately start timing through the timing module 11. If the abnormal voltage duration exceeds the preset time limit (1s - 2.0s), it is determined as a grid power supply problem. The PLC controller 9 will control the AC contactor 7 to cut off the power supply to protect the equipment from damage. If the voltage returns to normal within the preset time, the uninterruptible power supply module 6 will automatically stabilize the voltage, and the PLC controller 9 will eliminate the fault status, and the equipment will continue to operate normally. In addition, the PLC controller 9 will also record the voltage abnormal events for subsequent analysis and maintenance.

[0041] Furthermore, Figure 2 and Figure 3 Given by, for the convenience of staff operation, the fixed block 3 includes a convex block 12 and a trapezoidal block 13. A convex groove 14 adapted to the convex block 12 is provided on each of the left and right sides of the lower part of the protection cabinet 1. The shielding cloth 5 is used to shield the convex groove 14 to reduce the probability of foreign objects falling in. Each convex block 12 can slide back and forth along the corresponding convex groove 14, and each trapezoidal block 13 is fixedly connected to the side of the corresponding convex block 12 away from the convex groove 14;

[0042] It should be noted that the lower side plane of the trapezoidal block 13 is at the same horizontal plane as the lower surface of the protection cabinet 1. When the protection cabinet 1 is placed normally, the lower side plane of the trapezoidal block 13 contacts the ground, which is convenient for fixing.

[0043] Furthermore, Figures 2 - 4Given that in order to fix the fixed block 3 relative to the protective cabinet 1, the locking mechanism 4 includes a rotating frame 15. A locking block 16 that can slide left and right along the convex block 12 is connected to each of the upper and lower sides of the rotating frame 15. A rotating shaft 17 is fixedly connected to the middle of the rotating frame 15. The rotating frame 15 is rotatably connected to the convex block 12 through the rotating shaft 17. A connecting plate 18 is fixedly connected to one side of the rotating shaft 17 close to the trapezoidal block 13. A shifting plate 19 is slidably connected to the end of the connecting plate 18 away from the rotating shaft 17. A pressing sleeve 20 is fixedly connected to the middle of each shifting plate 19. The pressing sleeve 20, the shifting plate 19 and the connecting plate 18 cooperate with each other to form a structure for the rotation of the rotating frame 15;

[0044] It should be noted that a counterbore is provided at the position of the trapezoidal block 13 corresponding to each pressing sleeve 20, and each pressing sleeve 20 can slide up and down in the corresponding counterbore; a sliding groove is provided at the position of the convex block 12 corresponding to each locking block 16 for accommodating the locking block 16;

[0045] During the installation of the device, the bolt can be passed through the counterbore and threadedly connected and fixed to the nut pre-driven into the ground. During the process of continuously tightening the bolt downward, it will drive the pressing sleeve 20 to move downward, and then drive the corresponding end of the connecting plate 18 to move downward through the shifting plate 19. Since the connecting plate 18 and the rotating frame 15 are both rotatably connected to the convex block 12 through the rotating shaft 17, at this time, the connecting plate 18 will drive the rotating frame 15 to rotate, so that the locking blocks 16 at the upper and lower ends of the rotating frame 15 move outward relative to the convex block 12, and then press against the inner wall of the convex groove 14, so that the convex block 12 and the trapezoidal block 13 are fixed relative to the protective cabinet 1;

[0046] Furthermore, both the convex block 12 and the trapezoidal block 13 are made of conductive materials, such as copper alloy and aluminum alloy, which can keep the outer shell of the protective cabinet 1 always grounded. In addition, in order to achieve a better lightning protection effect and a good protection effect on the staff, the first protective door 27 and the second protective door 28 are both connected with grounding wires, which can keep the first protective door 27, the second protective door 28 and the protective cabinet 1 always grounded.

[0047] Furthermore, Figures 2 - 4 Given that a first sliding groove 21 is provided at each of the upper and lower ends of the rotating frame 15. A first sliding rod 22 is fixedly connected to one side of each locking block 16 close to the first sliding groove 21. Each locking block 16 is slidably connected to the first sliding groove 21 through the first sliding rod 22. A second sliding groove 23 is provided on the side of the connecting plate 18 close to the shifting plate 19. A second sliding rod 24 is fixedly connected to one side of the shifting plate 19 close to the second sliding groove 23. The second sliding rod 24 is slidably connected to the second sliding groove 23;

[0048] When in use, since the movement direction of each locking block 16 and its corresponding first sliding rod 22 is horizontal left and right movement, and since the movement direction of the clamping sleeve 20 and the toggle plate 19 is vertical up and down, that is, the movement direction of the second sliding rod 24 is vertical up and down, and the movement direction of the rotating frame 15 and the connecting plate 18 is rotation, only through the sliding connection between the first sliding rod 22 and the first sliding groove 21, and the sliding connection between the second sliding rod 24 and the second sliding groove 23, the operation can be smoother.

[0049] Further, by Figures 2 - 4 It is given that, in order to facilitate the adjustment of the position of the fixed block 3, a return spring 25 is provided on the side of each locking block 16 close to the rotating shaft 17, and a plurality of rubber blocks 26 are fixedly connected to the side of each locking block 16 away from the first sliding rod 22;

[0050] During use, when the clamping sleeve 20 is not subjected to force, under the action of the return spring 25, each locking block 16 is located inside the convex block 12, so that the convex block 12 can slide back and forth relative to the convex groove 14, and the rubber block 26 can increase the friction between the locking block 16 and the inner wall of the convex groove 14.

[0051] Further, by Figure 1 It is given that, in order to facilitate the staff to debug the device, a first protective door 27 is rotatably connected to the front side of the protective cabinet 1, and a second protective door 28 rotatably connected to the protective cabinet 1 is provided on the lower side of the first protective door 27;

[0052] It should be noted that both the first protection door 27 and the second protection door 28 are rotatably connected to the protection cabinet 1 via hinges, and both the first protection door 27 and the second protection door 28 are provided with cabinet door locks.

[0053] Further, by Figures 1 - 5 It is given that, in order to realize the characteristics of delayed protection, the lightning protection delayed protection system 2 also includes a power switch 10 for controlling the opening and closing of the uninterruptible power supply module 6, and the PLC controller 9 has a built-in timing module 11;

[0054] It should be noted that the PLC controller 9 is a prior art, and the PLC controller 9 is electrically connected to the voltage transmitter 8, the AC contactor 7, and the uninterruptible power supply module 6. The output end of the surge protector 29 is connected to the voltage transmitter 8, the output end of the voltage transmitter 8 is connected to the uninterruptible power supply module 6, the output end of the uninterruptible power supply module 6 is connected to the AC contactor 7, and the output end of the AC contactor 7 is connected to the load, providing stable power transmission for electrical appliances. The lightning protection delay protection system 2 is placed inside the protection cabinet 1 and is electrically connected to the load through a cable. The rated input voltage of the voltage transmitter 8 is three-phase AC380V, the rated output voltage of the uninterruptible power supply module 6 is single-phase AC220V, the longest delay time of the timing module 11 is 2h, the overall rated working current of the lightning protection delay protection system 2 is 17.5A, the rated power is 6kW, and the overall antistatic strength of the protection cabinet 1 is ≥1500V.

[0055] When the utility model is used, the protective cabinet 1 can be placed in a suitable position first, and the position of the fixing block 3 can be moved back and forth to facilitate the staff to fix the protective cabinet 1. When the device is installed, the bolt can be passed through the countersunk hole and then threadedly connected to the nut pre-inserted on the ground. In the process of continuously tightening the bolt downward, the pressing sleeve 20 will be driven downward to move downward, and then the corresponding end of the connecting plate 18 will be driven downward by the toggle plate 19. Since the connecting plate 18 and the rotating frame 15 are rotatably connected to the convex block 12 through the rotating shaft 17, the connecting plate 18 will drive the rotating frame 15 to rotate at this time, thereby causing the locking blocks 16 at the upper and lower ends of the rotating frame 15 to move outward relative to the convex block 12, and then press the inner wall of the convex groove 14 tightly, so that the convex block 12, The trapezoidal block 13 is fixed relative to the protective cabinet 1, and the bolts are tightened continuously to complete the installation of the cabinet. When the device is running, the voltage transmitter 8 will continuously monitor the incoming voltage. Once the voltage is found to be lower than the preset alarm value, the PLC controller 9 will immediately start timing through the timing module 11. If the voltage abnormality lasts for more than the preset time limit (1s-2.0s), it is determined to be a power supply problem of the power grid. The PLC controller 9 will control the AC contactor 7 to cut off the power supply to protect the equipment from damage. If the voltage returns to normal within the preset time, the uninterruptible power supply module 6 will automatically stabilize the voltage, the PLC controller 9 will eliminate the fault state, and the equipment will continue to operate normally. In addition, the PLC controller 9 will also record voltage abnormality events for subsequent analysis and maintenance.

[0056] The utility model has a novel structure, ingenious conception, and simple and convenient operation. Through the design, the function of load delay protection is effectively realized, which is convenient for fixing the protective cabinet 1, convenient for staff to operate, convenient for adjusting the front and rear positions of the protective cabinet 1, and convenient for staff to debug the device.

[0057] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A lightning protection delay protection device, comprising a lightning protection delay protection system arranged in a protection cabinet, characterized in that: A fixed block that can move forward and backward is provided on the left and right sides of the lower part of the protective cabinet, and a plurality of locking mechanisms for limiting the position of the fixed block are provided inside each fixed block, and a shielding cloth is fixedly connected to the upper side of the fixed block; The lightning protection delay protection system comprises: Surge protector, used to conduct and shunt current; Uninterruptible power supply module, used to provide stable power output to the load; An AC contactor, used to control the on-off of the output of the uninterruptible power supply module to the load; Voltage transmitter, used to detect the change of incoming line voltage and convert the voltage signal into an electrical signal; A PLC controller is used to process and send signals between the uninterruptible power supply module and the AC contactor.

2. The lightning protection delay protection device according to claim 1, characterized in that: The fixed block includes a convex block and a trapezoidal block. A convex groove matched with the convex block is respectively opened on the left and right sides of the lower part of the protective cabinet. Each of the convex blocks can slide back and forth along the corresponding convex groove, and each of the trapezoidal blocks is fixedly connected to the side of the corresponding convex block away from the convex groove.

3. The lightning protection delay protection device according to claim 2, characterized in that: The locking mechanism includes a rotating frame, and a locking block that can slide left and right along the convex block is respectively connected to the upper and lower sides of the rotating frame, and a rotating shaft is fixedly connected to the middle part of the rotating frame, and the rotating frame is rotatably connected to the convex block through the rotating shaft, and a connecting plate is fixedly connected to the side of the rotating shaft close to the trapezoidal block, and a toggle plate is slidably connected to the end of the connecting plate away from the rotating shaft, and a clamping sleeve is fixedly connected to the middle part of each toggle plate, and the clamping sleeve, the toggle plate and the connecting plate cooperate with each other to form a structure for rotating the rotating frame.

4. A lightning protection delay protection device according to claim 3, characterized in that: The upper and lower ends of the rotating frame are each provided with a first sliding groove, and each locking block is fixedly connected to a first sliding rod on a side close to the first sliding groove, and each locking block is slidably connected to the first sliding groove through the first sliding rod, and a second sliding groove is provided on a side of the connecting plate close to the toggle plate, and a second sliding rod is fixedly connected to a side of the toggle plate close to the second sliding groove, and the second sliding rod is slidably connected to the second sliding groove.

5. A lightning protection delay protection device according to claim 4, characterized in that: A return spring is provided on one side of each locking block close to the rotating shaft, and a plurality of rubber blocks are fixedly connected to one side of each locking block away from the first sliding rod.

6. A lightning protection delay protection device according to claim 1, characterized in that: A first protective door is rotatably connected to the front side of the protective cabinet, and a second protective door rotatably connected to the protective cabinet is provided at the lower side of the first protective door.

7. A lightning protection delay protection device according to claim 1, characterized in that: The lightning protection delay protection system also includes a power switch for controlling the opening and closing of the uninterruptible power supply module, and the PLC controller is equipped with a timing module.

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