Reactive power compensation device

Abstract

The utility model discloses a reactive power compensation device, which comprises a protective outer cover, an automatic door opening mechanism and a convenient-to-maintain mechanism, a mounting groove is formed in the protective outer cover, heat dissipation holes are formed in the rear ends of the left side face and the right side face of the protective outer cover, and supports are fixedly connected to the four corners of the bottom face of the protective outer cover; the automatic door opening mechanism is arranged at the front end of the protective outer cover; the convenient-to-maintain mechanism is arranged at the rear end of the bottom wall of the mounting groove, the upper surface of the convenient-to-maintain mechanism is fixedly connected with a silicon controlled rectifier, and the input end of the silicon controlled rectifier is electrically connected with an external power grid; the parallel capacitor is fixedly connected to the middle part of the front end of the upper surface of the mounting groove; the reactive power compensation device can generate an external obvious change warning when the equipment works abnormally, and has the functions of overload prevention and short circuit prevention at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of polyethylene production, in particular to a reactive power compensation device. Background Art

[0002] Polyethylene production will generate power load during the production process. In order to provide power load to related equipment, reactive power compensation devices are required.

[0003] Some traditional reactive power compensation devices connect the grid in series with a shunt capacitor to provide reactive power consumed by the inductive load to the production equipment.

[0004] There are some problems. When the equipment is overloaded, there is no obvious external change, which causes the patrol personnel to fail to discover it in time, resulting in easy damage to the components. For this reason, we propose a reactive power compensation device. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a reactive power compensation device, which has obvious appearance changes when the device does not work normally, and can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reactive power compensation device, including a protective cover, an automatic door opening mechanism and a maintenance-friendly mechanism;

[0007] Protective cover: a mounting slot is provided inside the protective cover, heat dissipation holes are provided at the rear ends of the left and right sides of the protective cover, and brackets are fixedly connected to the four corners of the bottom surface of the protective cover;

[0008] Automatic door opening mechanism: it is arranged at the front end of the protective cover;

[0009] Maintenance-friendly mechanism: It is arranged at the rear end of the bottom wall of the installation slot, and a thyristor is fixedly connected to the upper surface of the maintenance-friendly mechanism, and the input end of the thyristor is electrically connected to the external power grid;

[0010] Wherein: it also includes a parallel capacitor, and the parallel capacitor is fixedly connected to the middle part of the front end of the upper surface of the installation groove;

[0011] Among them: it also includes a fuse, which is fixedly connected to the rear side of the left end of the installation slot, the input end of the fuse is electrically connected to the output end of the thyristor, and the output end of the fuse is electrically connected to the input end of the parallel capacitor. It can generate an external obvious change warning when the equipment is working abnormally, and it has overload and short circuit protection functions.

[0012] Furthermore, a thermal relay is fixedly connected to the right side of the front end of the upper surface of the installation groove, the input end of the thermal relay is electrically connected to the output end of the parallel capacitor, and the output end of the thermal relay is electrically connected to the external power grid, which can prevent the output current from being too large.

[0013] Furthermore, a control switch group is fixedly connected to the left side of the protective cover, the input end of the control switch group is electrically connected to the external power supply, and the output end of the control switch group is electrically connected to the input end of the thyristor to provide power for the device.

[0014] Furthermore, the automatic door opening mechanism includes a rotating shaft, an inspection door and a gear 1. The rotating shaft is rotatably connected to the upper end of the inner wall of the mounting groove opened at the front end of the protective outer cover, the lower end of the rotating shaft is fixedly connected to the inspection door, and the outer surface of the right end of the rotating shaft is fixedly sleeved with a gear 1, which can produce obvious external changes and facilitate maintenance.

[0015] Furthermore, the automatic door opening mechanism also includes gear 2 and a motor. The front end right side of the mounting slot is fixedly connected to a mounting platform, the upper surface of the mounting platform is fixedly connected to a motor, the right end of the output shaft of the motor is fixedly connected to gear 2, gear 2 is meshingly connected to gear 1, and the input end of the motor is electrically connected to the output end of the control switch group, so that the door can be opened automatically.

[0016] Furthermore, the maintenance-friendly mechanism includes a sliding mounting plate and a handle. A sliding groove is provided at the rear end of the bottom wall of the mounting groove. A sliding mounting plate is slidably connected inside the sliding groove. The upper surface of the sliding mounting plate is fixedly connected to the lower surface of the thyristor. A handle is fixedly connected to the rear side of the sliding mounting plate to facilitate maintenance of vulnerable components.

[0017] Furthermore, the single-chip microcomputer is fixedly connected to the middle end of the bottom wall of the mounting groove, the input end of the single-chip microcomputer is electrically connected to the output end of the control switch group, the Hall current sensor 2 is fixedly connected to the right side of the front end of the bottom wall of the mounting groove, the input end of the Hall current sensor 2 is electrically connected to the output end of the thermal relay, the Hall current sensor 1 is fixedly connected to the left side of the front end of the bottom wall of the mounting groove, the input end of the Hall current sensor 1 is electrically connected to the output end of the fuse, the Hall current sensor 1 and the Hall current sensor 2 are both electrically connected to the single-chip microcomputer in both directions, the LED warning light is symmetrically fixedly connected to the lower end of the front side of the protective cover, the input end of the LED warning light and the input end of the motor are both electrically connected to the output end of the single-chip microcomputer, and can automatically warn in case of overload or short circuit.

[0018] Furthermore, the rear end of the protective outer cover is rotatably connected to a rotating door via a pin shaft, which is convenient for quick maintenance.

[0019] Compared with the prior art, the beneficial effects of the utility model are: the reactive power compensation device has the following advantages:

[0020] 1. When the equipment is overloaded, the fuse will automatically blow and the circuit will be broken. At this time, the inductance signals of Hall current sensor 1 and Hall current sensor 2 will disappear. The single-chip microcomputer receives the disappearance of the two inductance signals and supplies power to the two left LED warning lights. The LED warning lights light up at the same time. At the same time, the single-chip microcomputer controls the motor to start. The operation of the motor drives gear 2 to rotate, and the rotation of gear 2 drives gear 1 to rotate. The rotation of gear 1 drives the shaft to rotate, and the rotation of the shaft drives the inspection door to rotate, and the inspection door opens. Therefore, when the internal equipment is overloaded, the LED warning light will light up and the inspection door will be automatically opened at the same time, which makes the appearance change significantly, making it easier for patrol personnel to discover equipment failures in time, repair them in time to prevent equipment damage, and open the inspection door in advance for quick maintenance.

[0021] 2. The thyristor is a fragile component. Open the rotating door on the rear side and pull the handle. The handle drives the sliding mounting plate to drive the thyristor to slide backwards, so that the thyristor can be quickly repaired or replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the upper and left side sectional structure of the utility model.

[0024] In the figure: 1 protective cover, 2 control switch group, 3 thyristor, 4 parallel capacitor, 5 single chip microcomputer, 6 thermal relay, 7 fuse, 8 automatic door opening mechanism, 81 rotating shaft, 82 inspection door, 83 gear 1, 84 gear 2, 85 motor, 9 easy maintenance mechanism, 91 sliding mounting plate, 92 handle, 10 mounting slot, 11 Hall current sensor 1, 12 Hall current sensor 2, 13 bracket, 14 LED warning light, 15 heat dissipation hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0026] See also Figure 1-2 , This embodiment provides a technical solution: a reactive power compensation device, including a protective cover 1, an automatic door opening mechanism 8 and a maintenance-friendly mechanism 9;

[0027] Protection cover 1: a mounting groove 10 is provided inside the protection cover 1, heat dissipation holes 15 are provided at the rear ends of the left and right sides of the protection cover 1, brackets 13 are fixedly connected to the four corners of the bottom surface of the protection cover 1, a thermal relay 6 is fixedly connected to the right side of the front end of the upper surface of the mounting groove 10, the input end of the thermal relay 6 is electrically connected to the output end of the parallel capacitor 4, the output end of the thermal relay 6 is electrically connected to the external power grid, a control switch group 2 is fixedly connected to the left side of the protection cover 1, the input end of the control switch group 2 is electrically connected to the external power supply, the output end of the control switch group 2 is electrically connected to the input end of the thyristor 3, and the rear end of the protection cover 1 is rotatably connected to a rotating door through a pin shaft;

[0028] Automatic door opening mechanism 8: It is arranged at the front end of the protective outer cover 1. The automatic door opening mechanism 8 includes a rotating shaft 81, an inspection door 82 and a gear 1 83. The rotating shaft 81 is rotatably connected to the upper end of the inner wall of the mounting groove opened at the front end of the protective outer cover 1. The inspection door 82 is fixedly connected to the lower end of the rotating shaft 81. The outer surface of the right end of the rotating shaft 81 is fixedly sleeved with a gear 1 83. The automatic door opening mechanism 8 also includes a gear 2 84 and a motor 85. A mounting platform is fixedly connected to the right side of the front end of the mounting groove 10. The upper surface of the mounting platform is fixedly connected to the motor 85. The right end of the output shaft of the motor 85 is fixedly connected to the gear 2 84. The gear 2 84 is meshed with the gear 1 83. The input end of the motor 85 is electrically connected to the output end of the control switch group 2. When the equipment is overloaded, the fuse 7 will automatically blow and open the circuit. At this time, the fuse 7 will automatically blow and open the circuit. The inductance signals of Hall current sensor 11 and Hall current sensor 2 12 both disappear, and the single chip microcomputer 5 receives that the two inductance signals disappear, and supplies power to the two left LED warning lights 14, and the LED warning lights 14 light up at the same time. At the same time, the single chip microcomputer 5 controls the motor 85 to start, and the operation of the motor 85 drives the gear 2 84 to rotate, and the rotation of the gear 2 84 drives the gear 1 83 to rotate, and the rotation of the gear 1 83 drives the shaft 81 to rotate, and the rotation of the shaft 81 drives the inspection door 82 to rotate, and the inspection door 82 opens, so that when the internal equipment is overloaded, the LED warning lights 14 are turned on, and the inspection door 82 is automatically opened at the same time, so that the appearance changes significantly, which is convenient for patrol personnel to find equipment failures in time, and to repair them in time to prevent equipment damage. At the same time, the inspection door 82 is opened in advance for quick maintenance;

[0029] Maintenance-friendly mechanism 9: It is arranged at the rear end of the bottom wall of the installation groove 10. The upper surface of the maintenance-friendly mechanism 9 is fixedly connected with the thyristor 3. The input end of the thyristor 3 is electrically connected to the external power grid. The maintenance-friendly mechanism includes a sliding mounting plate 91 and a handle 92. A sliding groove is provided at the rear end of the bottom wall of the installation groove 10. The sliding mounting plate 91 is slidably connected inside the sliding groove. The upper surface of the sliding mounting plate 91 is fixedly connected with the lower surface of the thyristor 3. The rear side of the sliding mounting plate 91 is fixedly connected with the handle 92. The thyristor 3 is a fragile component. Open the rotating door on the rear side and pull the handle 92. The handle 92 drives the sliding mounting plate 91, which can drive the thyristor 3 to slide backward, thereby quickly repairing or replacing the thyristor 3.

[0030] Wherein: it also includes a parallel capacitor 4, which is fixedly connected to the middle of the front end of the upper surface of the mounting groove 10;

[0031] Wherein: it also includes a fuse 7, which is fixedly connected to the rear side of the left end of the installation groove 10, the input end of the fuse 7 is electrically connected to the output end of the thyristor 3, and the output end of the fuse 7 is electrically connected to the input end of the parallel capacitor 4, the single-chip computer 5 is fixedly connected to the middle end of the bottom wall of the installation groove 10, the input end of the single-chip computer 5 is electrically connected to the output end of the control switch group 2, the Hall current sensor 2 12 is fixedly connected to the right side of the front end of the bottom wall of the installation groove 10, the input end of the Hall current sensor 2 12 is electrically connected to the output end of the thermal relay 6, the Hall current sensor 1 11 is fixedly connected to the left side of the front end of the bottom wall of the installation groove 10, the input end of the Hall current sensor 1 11 is electrically connected to the output end of the fuse 7, the Hall current sensor 1 11 and the Hall current sensor 2 12 are both bidirectionally electrically connected to the single-chip computer 5, the LED warning light 14 is fixedly connected to the lower end of the front side of the protective cover 1 symmetrically, and the input end of the LED warning light 14 and the input end of the motor 85 are both electrically connected to the output end of the single-chip computer 5.

[0032] The working principle of a reactive power compensation device provided by the utility model is as follows: during operation, the external power grid inputs current to the thyristor 3, and when the control switch group 2 supplies power to the anode of the thyristor 3, the thyristor 3 is in the on state, and the current is transmitted to the fuse 7, and the fuse 7 transmits the current to the parallel capacitor 4, and the parallel capacitor 4 then transmits the current to the thermal relay 6, and the thermal relay 6 outputs the current to the power grid to compensate for the reactive power of the inductive load of the power system. When the equipment is overloaded, the fuse 7 will automatically blow and open the circuit. At this time, the inductance signals of the Hall current sensor 1 11 and the Hall current sensor 2 12 disappear, and the single-chip microcomputer 5 receives that the two inductance signals disappear, and supplies power to the two left LED warning lights 14, and the LED warning lights 14 light up at the same time. At the same time, the single-chip microcomputer 5 controls the motor 85 to start, and the operation of the motor 85 drives the gear 2 84 to rotate, and the rotation of the gear 2 84 drives the gear 1 83 to rotate, and the gear The rotation of wheel 1 83 drives the rotating shaft 81 to rotate, and the rotation of the rotating shaft 81 drives the inspection door 82 to rotate, and the inspection door 82 is opened. Therefore, when the internal equipment is overloaded, the LED warning light 14 is turned on, and the inspection door 82 is automatically opened, thereby causing a significant change in the appearance, which is convenient for patrol personnel to promptly discover equipment failures and carry out timely maintenance to prevent equipment damage. At the same time, the inspection door 82 is opened in advance for rapid maintenance. When the output current of the equipment is too large, the thermal relay 6 is disconnected, and the electrical signal of the Hall current sensor 2 12 disappears. The single-chip microcomputer 5 receives the signal and supplies power to the LED warning light 14 on the right. When the LED warning light 14 is on, it can be clearly distinguished whether the overload is caused by excessive input current or excessive output current. The thyristor 3 is a fragile component. Open the rotating door on the rear side and pull the handle 92. The handle 92 drives the sliding mounting plate 91 to drive the thyristor 3 to slide backward, thereby quickly repairing or replacing the thyristor 3.

[0033] It is worth noting that the thyristor 3 disclosed in the above embodiment can be selected from G6B-4BND DC24V, the single-chip computer 5 can be selected from STM32F437ZI T6, the fuse 7 can be selected from RT18, the thermal relay (6) can be selected from JR36-63 40-63A, the motor 85 can be selected from YS7114-250W, and the control switch group is provided with control buttons corresponding to the motor 85, the single-chip computer 5 and the thyristor 3 and used to control the switch thereof. The single-chip computer 5 can control the switch of the motor 85.

[0034] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A reactive power compensation device, characterized in that: It comprises a protective cover (1), an automatic door opening mechanism (8) and a maintenance-friendly mechanism (9); The protective cover (1) has a mounting groove (10) formed therein, and heat dissipation holes (15) are formed at the rear ends of the left and right sides of the protective cover (1). The four corners of the bottom surface of the protective cover (1) are fixedly connected with brackets (13); Automatic door opening mechanism (8): arranged at the front end of the protective cover (1); A maintenance-friendly mechanism (9): the mechanism is arranged at the rear end of the bottom wall of the installation groove (10), and a thyristor (3) is fixedly connected to the upper surface of the maintenance-friendly mechanism (9), and the input end of the thyristor (3) is electrically connected to the external power grid; Wherein: it also includes a parallel capacitor (4), and the parallel capacitor (4) is fixedly connected to the middle part of the front end of the upper surface of the installation groove (10); The device further comprises a fuse (7), wherein the fuse (7) is fixedly connected to the rear side of the left end of the mounting groove (10), the input end of the fuse (7) is electrically connected to the output end of the thyristor (3), and the output end of the fuse (7) is electrically connected to the input end of the parallel capacitor (4).

2. A reactive power compensation device according to claim 1, characterized in that: A thermal relay (6) is fixedly connected to the right side of the front end of the upper surface of the installation groove (10); the input end of the thermal relay (6) is electrically connected to the output end of the parallel capacitor (4); and the output end of the thermal relay (6) is electrically connected to the external power grid.

3. A reactive power compensation device according to claim 1, characterized in that: A control switch group (2) is fixedly connected to the left side of the protective cover (1); the input end of the control switch group (2) is electrically connected to an external power supply, and the output end of the control switch group (2) is electrically connected to the input end of a thyristor (3).

4. A reactive power compensation device according to claim 3, characterized in that: The automatic door opening mechanism (8) comprises a rotating shaft (81), an inspection door (82) and a gear one (83); the rotating shaft (81) is rotatably connected to the upper end of the inner wall of a mounting groove provided at the front end of the protective outer cover (1); the lower end of the rotating shaft (81) is fixedly connected to the inspection door (82); and the outer surface of the right end of the rotating shaft (81) is fixedly sleeved with a gear one (83).

5. A reactive power compensation device according to claim 4, characterized in that: The automatic door opening mechanism (8) further comprises a second gear (84) and a motor (85); a mounting platform is fixedly connected to the right side of the front end of the mounting groove (10); a motor (85) is fixedly connected to the upper surface of the mounting platform; a second gear (84) is fixedly connected to the right end of the output shaft of the motor (85); and the second gear (84) is meshingly connected to the first gear (83).

6. A reactive power compensation device according to claim 1, characterized in that: The maintenance-friendly mechanism comprises a sliding mounting plate (91) and a handle (92); a sliding groove is provided at the rear end of the bottom wall of the mounting groove (10); a sliding mounting plate (91) is slidably connected inside the sliding groove; the upper surface of the sliding mounting plate (91) is fixedly connected to the lower surface of the thyristor (3); and the handle (92) is fixedly connected to the rear side surface of the sliding mounting plate (91).

7. A reactive power compensation device according to claim 5, characterized in that: The device also comprises a single chip microcomputer (5), a first Hall current sensor (11), a second Hall current sensor (12) and an LED warning light (14), wherein the single chip microcomputer (5) is fixedly connected to the middle end of the bottom wall of the installation slot (10), the input end of the single chip microcomputer (5) is electrically connected to the output end of the control switch group (2), the second Hall current sensor (12) is fixedly connected to the front right side of the bottom wall of the installation slot (10), the input end of the second Hall current sensor (12) is electrically connected to the output end of the thermal relay (6), and the Hall current sensor (1 ... The first Hall current sensor (11) is fixedly connected to the left side of the front end of the bottom wall of the installation groove (10); the input end of the first Hall current sensor (11) is electrically connected to the output end of the fuse (7); the first Hall current sensor (11) and the second Hall current sensor (12) are both electrically connected to the single-chip computer (5) in a bidirectional manner; the LED warning light (14) is fixedly connected to the lower end of the front side of the protective cover (1) in a bilaterally symmetrical manner; the input end of the LED warning light (14) and the input end of the motor (85) are both electrically connected to the output end of the single-chip computer (5).

8. A reactive power compensation device according to claim 1, characterized in that: The rear end of the protective outer cover (1) is rotatably connected to a rotating door via a pin shaft.

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