Combined low-voltage reactive power compensation device and combination method

Abstract

The invention relates to the technical field of compensation devices, in particular to a combined low-voltage reactive power compensation device and a combination method.The combined low-voltage reactive power compensation device comprises a low-voltage reactive power compensation device body and a capacitor bank, an assembly frame is installed in the low-voltage reactive power compensation device body, and a fixed transverse rod is fixedly connected to the outer surface of the assembly frame; and a high-temperature protection mechanism is arranged on the fixed cross rod. Through integrated cooperation of the high-temperature protection mechanism and the fire extinguishing mechanism, capacitor elements are installed at intervals, efficient heat dissipation during use of the capacitor bank is achieved through cooperation of the design of the heat dissipation plate, and once a certain capacitor bank breaks down or is in a fire behavior, the installation frame connected with the capacitor bank rapidly reacts and falls into the isolation box to be independently isolated. The capacitor bank on the side is prevented from being damaged; and after the capacitor bank falls, a fire extinguishing mechanism at the bottom of the inner cavity of the isolation box is triggered, so that fire extinguishing powder is sprayed out, a fire source is quickly inhibited, and fire is prevented from spreading to adjacent capacitors and other electric appliance elements.

Description

Technical Field

[0001] The present invention relates to the technical field of compensation devices, and in particular to a combined low-voltage reactive power compensation device and a combination method. Background Art

[0002] In the power system, due to the presence of a large number of inductive loads (such as motors, transformers, etc.), a large amount of reactive power will be generated. The presence of reactive power will not only reduce the power factor of the power grid and increase line losses, but also affect the voltage stability of the power grid. Therefore, compensating the power grid through reactive power compensation devices is an important means to improve the efficiency and economy of power grid operation.

[0003] In the prior art, there is a combined low-voltage reactive power compensation device that is easy to install, such as the publication number CN221102715U, which includes a device body, the outer wall of the device body is rotatably connected to an upper door, the outer wall of the device body is rotatably connected to a lower door, the inner cavity of the device body is fixedly equipped with a mounting frame, the outer wall of the mounting frame is fixedly equipped with a slide bar, and the outer wall of the mounting frame is rotatably connected to a screw. By setting the mounting frame, screw, knob, and clamp, when the capacitor needs to be fixed, the capacitor can be directly placed on the top of the mounting frame, and then the knob can be rotated, and the clamp and the fixing plate can move inward under the drive of the screw. In the process of inward movement, the capacitor can be fixed, and there is no need to install the capacitors one by one, which is very convenient and quick.

[0004] In order to avoid damage to the capacitors caused by high temperature, air ducts and heat dissipation motors are installed on the outer walls of both sides of the equipment body. However, in actual use, when a fire occurs locally in a single capacitor, if there is a lack of an effective blocking mechanism, the fire may quickly spread to adjacent capacitors and other electrical components, causing damage to the entire low-voltage reactive power compensation device in parallel, thereby affecting its use effect.

[0005] Therefore, the present invention proposes a combined low-voltage reactive power compensation device and a combination method to solve the problem that the existing device lacks an effective blocking mechanism, which easily causes the entire low-voltage reactive power compensation device to be damaged in parallel and is inconvenient to maintain. The capacitor can be installed in a reasonable layout to ensure that the capacitor is easy to repair when a failure occurs and avoid damage to normal electrical components nearby. Summary of the invention

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a combined low-voltage reactive power compensation device and a combination method, which have the advantages of being able to reasonably arrange the installation of capacitors, ensuring easy maintenance when capacitors fail, and avoiding damage to normal electrical components nearby.

[0007] To achieve the above object, the present invention provides the following technical solutions: On the one hand, a combined low-voltage reactive power compensation device includes a low-voltage reactive power compensation device body and a capacitor bank. An assembly frame is installed inside the low-voltage reactive power compensation device body. A fixed cross bar is fixedly connected to the outer surface of the assembly frame. A high-temperature protection mechanism is arranged on the fixed cross bar. The high-temperature protection mechanism includes a mounting frame and an isolation box. An avoidance groove is opened on the inner wall of the fixed cross bar. The capacitor bank is fixedly installed inside the mounting frame. Heat dissipation plates are respectively fixedly installed on both sides of the capacitor bank. The heat dissipation plates are fixedly installed inside the fixed cross bar. The isolation box is fixedly installed directly below the mounting frame. An isolation bottom plate is fixedly installed on the inner bottom surface of the isolation box. A receiving groove is opened on the upper inner wall of the isolation bottom plate. A fire extinguishing mechanism is arranged on the inner surface of the receiving groove. The fire extinguishing mechanism includes a receiving cylinder. Mounting side plates are respectively arranged on the outer surfaces of both sides of the mounting frame. The mounting side plates are fixedly installed on the upper surface of the fixed cross bar.

[0008] Preferably, a convex plate is fixedly connected to the outer surface of the mounting side plate. A reserved groove is opened inside the mounting side plate. A T-shaped lock block is slidably installed on the inner wall of the reserved groove. The T-shaped lock block is integrally in a "T" - shaped block structure. A trapezoidal groove is opened on the inner wall of one end of the T-shaped lock block. A fusing release component is movably connected inside the trapezoidal groove.

[0009] Preferably, the fusing release component includes a guiding plate and a trapezoidal insertion block. The outer surface of the trapezoidal insertion block is movably inserted into the inner surface of the trapezoidal groove. The guiding plate is fixedly installed on the outer surface of the inner side of the mounting side plate. One end of the guiding plate is fixedly connected with a fuse piece and a shape memory alloy. There are two groups of shape memory alloys, which are symmetrically distributed about the horizontal central axis of the fuse piece. The other ends of the fuse piece and the shape memory alloy are respectively fixedly connected to the outer surface of the trapezoidal insertion block.

[0010] Preferably, a reset avoidance component is arranged at the end of the T-shaped lock block far from the trapezoidal insertion block. The reset avoidance component includes a reset spring. There are two groups of reset springs. One ends of the two groups of reset springs are fixedly connected to the outer surface of the T-shaped lock block. The other ends of the reset springs are respectively fixedly connected to the inner surface of the convex plate.

[0011] Preferably, the mounting frame is integrally in a "C" - shaped plate structure. The outer surfaces of both ends of the mounting frame are respectively slidably connected to the inner sides of the mounting side plates. Side grooves are respectively opened on the outer surfaces of both sides of the mounting frame. A slot is opened through the lower end of the side groove. The inner surfaces of the slot and the side groove are respectively movably connected to the outer surface of the T-shaped lock block.

[0012] Preferably, a mounting seat 1 and a mounting seat 2 are movably mounted on the outer surface of the upper end of the mounting frame, and fixing bolts are respectively penetrated and connected at both ends of the mounting seat 1 and the mounting seat 2, and the mounting seat 1 and the mounting seat 2 are fixedly connected by the fixing bolts.

[0013] Preferably, an inert gas storage balloon is provided on the bottom surface of the inner cavity of the receiving tube, a flange seat is fixedly connected to the outer surface of the upper end of the receiving tube, a sliding sleeve is movably installed on the inner side of the flange seat, an outer edge is fixedly installed on the upper end of the sliding sleeve, an arc-shaped spring clip is fixedly connected to the lower surface of the outer edge, the arc-shaped spring clip is provided in multiple groups and is arranged in an array equidistantly about the central axis of the sliding sleeve, and the other ends of the arc-shaped spring clips are respectively fixedly connected to the upper surface of the flange seat.

[0014] Preferably, a puncture assembly is provided on the inner side of the sliding sleeve, and the puncture assembly includes a connecting plate and a conical cover, the conical cover is fixedly mounted on the lower surface of the connecting plate, the outer surface of the connecting plate is fixedly connected to the inner ring surface of the sliding sleeve, the inner wall of the conical cover is provided with a dispersion hole, and the central inner wall of the connecting plate is provided with a circular through hole.

[0015] Preferably, a ejector pin is fixedly mounted on the lower end of the conical cover, and the outer surface of the ejector pin is movably connected to the upper surface of the inert gas storage balloon.

[0016] On the other hand, a method for combining a combined low-voltage reactive power compensation device comprises the following steps:

[0017] S1. Install the capacitor banks separately and install heat sinks between adjacent capacitor banks;

[0018] S2. When the capacitor bank fails and its temperature exceeds a predetermined threshold, the fuse release assembly installed on the inner side of the mounting side plate is activated by the high temperature, releasing the restriction on the T-type lock block;

[0019] S3. After the fuse is released, the T-shaped lock block quickly retracts under the action of the reset avoidance component, breaking away from the restriction on the mounting frame and falling into the isolation box below under the action of gravity;

[0020] S4. When the capacitor group falls into the isolation box, its bottom contacts the isolation bottom plate and triggers the puncture assembly, puncturing the inert gas storage balloon to release the inert gas, which fills the inner cavity of the fire extinguishing cavity isolation box and controls the fire in time.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention proposes a combined low-voltage reactive power compensation device and a combination method. Through the integration of a high-temperature protection mechanism and a fire extinguishing mechanism, each capacitor element is installed at intervals, and the design of a heat sink is used to achieve efficient heat dissipation of the capacitor group when in use. Once a capacitor group fails or catches fire, the mounting frame connected to the capacitor group responds quickly and falls into the isolation box for separate isolation to avoid damage to the adjacent capacitor group; and after the capacitor group falls, the fire extinguishing mechanism at the bottom of the inner cavity of the isolation box is triggered to spray out the fire extinguishing powder, quickly suppress the fire source, and prevent the fire from spreading to adjacent capacitors and other electrical components, thereby reducing the risk of parallel damage to the overall device due to local failures. This not only solves the problem of lack of an effective isolation mechanism in the prior art, but also provides a strong guarantee for the safe and efficient operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the low-voltage reactive power compensation device body of the present invention;

[0024] Figure 2 It is a schematic structural diagram of the low-voltage reactive power compensation device body of the present invention in an open state;

[0025] Figure 3 It is a schematic diagram of the connection structure between the fixed cross bar and the high temperature protection mechanism of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the capacitor bank of the present invention falling into the isolation box;

[0027] Figure 5 It is a schematic diagram of the side cross-sectional structure of the capacitor bank of the present invention falling into the interior of the isolation box;

[0028] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at point A;

[0029] Figure 7 It is a schematic diagram of the assembly and disassembly structure of the capacitor bank and the mounting frame of the present invention;

[0030] Figure 8 It is a schematic diagram of the horizontal cross-section structure of the mounting side plate of the present invention;

[0031] Fig. 9 For the present invention Figure 8 A schematic diagram of the enlarged structure at B;

[0032] Fig.10 It is a partial cross-sectional structural schematic diagram of the isolation bottom plate and the fire extinguishing mechanism of the present invention;

[0033] Fig.11 For the present invention Fig.10A schematic diagram of the enlarged structure at C;

[0034] Fig.12 It is a partial three-dimensional structural schematic diagram of the fire extinguishing mechanism of the present invention;

[0035] Fig.13 It is a flow chart of the present invention.

[0036] In the figure: 1. low-voltage reactive power compensation device body; 2. assembly frame; 3. fixed cross bar; 30. avoidance groove; 4. capacitor bank; 41. mounting seat 1; 42. mounting seat 2; 43. fixing bolt; 5. mounting frame; 50. side groove; 500. slot; 6. mounting side plate; 7. isolation box; 8. heat sink; 61. convex plate; 60. reserved groove; 62. T-lock block; 621. reset spring; 620. trapezoidal groove; 63. lead plate; 631. fuse; 632. trapezoidal plug block; 633. shape memory alloy; 9. isolation bottom plate; 90. receiving groove; 10. receiving tube; 101. inert gas storage capsule; 102. flange seat; 103. arc-shaped spring; 104. sliding sleeve; 105. connecting plate; 106. conical cover; 107. ejector pin; 108. escape hole. DETAILED DESCRIPTION

[0037] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] For example, see Figure 1-13The present invention provides a technical solution: a combined low-voltage reactive power compensation device, comprising a low-voltage reactive power compensation device body 1 and a capacitor group 4, an assembly frame 2 is installed inside the low-voltage reactive power compensation device body 1, and a fixed cross bar 3 is fixedly connected to the outer surface of the assembly frame 2, and a high-temperature protection mechanism is arranged on the fixed cross bar 3, and the high-temperature protection mechanism includes a mounting frame 5 and an isolation box 7, and an avoidance groove 30 is opened on the inner wall of the fixed cross bar 3, the capacitor group 4 is fixedly installed on the inner side of the mounting frame 5, and heat sinks 8 are fixedly installed on both sides of the capacitor group 4, and the heat sinks 8 are fixedly installed on the inner side of the fixed cross bar 3, and the isolation box 7 is fixedly installed directly below the mounting frame 5, and an isolation bottom plate 9 is fixedly installed on the bottom surface of the inner cavity of the isolation box 7, and a receiving groove 90 is opened on the inner wall of the upper end of the isolation bottom plate 9, and a fire extinguishing mechanism is arranged on the inner surface of the receiving groove 90, and the fire extinguishing mechanism includes a receiving tube 10, and mounting side plates 6 are respectively arranged on the outer surfaces of both sides of the mounting frame 5, and the mounting side plates 6 are fixedly installed on the upper surface of the fixed cross bar 3;

[0039] Through the integration of the high-temperature protection mechanism and the fire extinguishing mechanism, the capacitor elements are installed at intervals, and the design of the heat sink 8 is used to achieve efficient heat dissipation of the capacitor group 4 when in use. Once a failure or fire occurs in a capacitor group 4, the mounting frame 5 connected to the capacitor group 4 responds quickly and falls into the isolation box 7 for separate isolation to avoid damage to the capacitor group 4 on the side; and after the capacitor group 4 falls, the fire extinguishing mechanism at the bottom of the inner cavity of the isolation box 7 is triggered to spray the fire extinguishing powder, quickly suppress the fire source, and prevent the fire from spreading to adjacent capacitors and other electrical components, thereby reducing the risk of parallel damage to the overall device due to local failures. This not only solves the problem of lack of an effective isolation mechanism in the prior art, but also provides a strong guarantee for the safe and efficient operation of the power system.

[0040] Embodiment 2, refer to the attached Figure 1-13 On the basis of the first embodiment, in order to realize the single group installation of the capacitor bank 4: the upper end outer surface of the mounting frame 5 is movably mounted with a mounting seat 1 41 and a mounting seat 2 42, and both ends of the mounting seat 1 41 and the mounting seat 2 42 are respectively penetrated and connected with fixing bolts 43, and the mounting seat 1 41 and the mounting seat 2 42 are fixedly connected by the fixing bolts 43;

[0041] The multiple capacitor groups 4 are installed separately, and the mounting seat 1 41 and the mounting seat 2 42 are detachably installed by using the fixing bolt 43, and the mounting seat 1 41 and the mounting seat 2 42 are connected to the mounting frame 5. When the capacitor group 4 needs to be installed separately or disassembled for maintenance, the fixing bolt 43 is screwed to detach the mounting seat 1 41 and the mounting seat 2 42 from the mounting frame 5; it should be noted that, inside the system, the assembly frame 2 has integrated the power cord to ensure that the socket at the rear end of the capacitor group 4 can be directly electrically connected to it, thereby achieving precise matching and efficient power supply between the power cord and the single capacitor group 4, and by introducing a detachable mounting seat structure and precise power cord matching, flexible installation and maintenance of a single capacitor group 4 is achieved, providing strong support for the stable operation of the power system.

[0042] Embodiment 3, refer to the attached Figure 1-13 On the basis of the second embodiment, in order to realize the capacitor bank 4 at a certain position to fail and quickly make an isolation response: the outer surface of the mounting side plate 6 is fixedly connected with a convex plate 61, the inner wall of the mounting side plate 6 is provided with a reserved groove 60, and a T-shaped locking block 62 is slidably installed on the inner wall of the reserved groove 60. The T-shaped locking block 62 is a "T"-shaped block structure as a whole, and a trapezoidal groove 620 is provided on the inner wall of one end of the T-shaped locking block 62. The inside of the trapezoidal groove 620 is movably connected with a fuse release component; the fuse release component includes It includes a lead plate 63 and a trapezoidal plug-in block 632. The outer surface of the trapezoidal plug-in block 632 is movably plugged with the inner surface of the trapezoidal slot 620. The lead plate 63 is fixedly mounted on the inner outer surface of the mounting side plate 6. One end of the lead plate 63 is fixedly connected with a fuse 631 and a shape memory alloy 633. The shape memory alloy 633 is provided with two groups and is symmetrically distributed about the horizontal central axis of the fuse 631. The other ends of the fuse 631, i.e., the shape memory alloy 633, are respectively fixedly connected with the outer surface of the trapezoidal plug-in block 632.

[0043] When the single capacitor bank 4 reacts, its temperature rises sharply and exceeds the established threshold, causing the temperature around the capacitor bank 4 to increase. At this time, the fuse link 631 installed inside the mounting side plate 6 is melted due to the high temperature, and the shape memory alloys 633 on both sides of the fuse link 631 return to a curved shape under the influence of the high temperature. The two sets of shape memory alloys 633 retract, releasing the pulling force on the trapezoidal insert block 632. In this way, the trapezoidal insert block 632 originally inserted inside the trapezoidal groove 620 is pulled out. In this way, the trapezoidal insert block 632 releases the restriction on the T-shaped lock block 62. It should be noted that when the capacitor bank 4 is in normal use, the temperature around the capacitor bank 4 and inside the mounting side plate 6 is normal. The trapezoidal insert block 632 is inserted into the inner wall of the trapezoidal groove 620 on both sides of the T-shaped lock block 62 under the mutual cooperation of the fuse link 631 and the shape memory alloy 633 to ensure the locking of the T-shaped lock block 62 and prevent one end of the T-shaped lock block 62 from detaching from the inner wall of the slot 500. Once the fuse release assembly is activated, the T-shaped lock block 62 can release the restriction on the slot 500. At this time, the T-shaped lock block 62 is no longer restricted, allowing the faulty capacitor bank 4 to be quickly isolated. It effectively improves the fault response speed and safety of the system, can quickly make an isolation reaction when the capacitor bank 4 fails, prevent the spread of the fault, and ensure the stable operation of the entire power system.

[0044] Embodiment 4, referring to the attached Figure 1-13 , on the basis of Embodiment 3, in order to achieve the rapid retraction of the T-shaped lock block 62 inside the slot 500 and ensure the downward movement of the mounting frame 5 and the inner capacitor bank 4: A reset avoidance component is provided at one end of the T-shaped lock block 62 away from the trapezoidal insert block 632. The reset avoidance component includes a reset spring 621. There are two sets of reset springs 621. One end outer surface of the two sets of reset springs 621 is fixedly connected to the outer surface of the T-shaped lock block 62, and the other ends of the reset springs 621 are respectively fixedly connected to the inner surface of the convex plate 61. The mounting frame 5 is integrally in a "C"-shaped plate-like structure. The outer surfaces of both ends of the mounting frame 5 are respectively slidably connected to the inner side surfaces of the mounting side plates 6. Side grooves 50 are respectively opened on the outer surfaces of both sides of the mounting frame 5. A slot 500 is opened through the lower end of the side groove 50. The inner surfaces of the slot 500 and the side groove 50 are respectively movably connected to the outer surface of the T-shaped lock block 62.

[0045] When the T-lock block 62 is free from the restriction of the trapezoidal plug-in block 632, one end of the T-lock block 62 is quickly pulled outward by the elastic force of the reset spring 621. At this time, the T-lock block 62 retreats to the inner side of the convex plate 61, and at this time, the end of the T-lock block 62 close to the mounting frame 5 is pulled out of the interior of the slot 500, and then the T-lock block 62 slides on the inner wall of the side groove 50. In this way, the mounting frame 5 and the capacitor bank 4 quickly fall into the interior of the isolation box 7 under the action of gravity, thereby realizing the rapid isolation of the faulty capacitor bank 4 and avoiding the parallel influence on the electrical components on the side, further solving the problem that the existing device lacks an effective blocking mechanism, which easily causes the parallel damage of the entire low-voltage reactive power compensation device and is inconvenient to maintain.

[0046] Embodiment 5, refer to the attached Figure 1-13 On the basis of the fourth embodiment, in order to realize the rapid fire extinguishing of the burning capacitor bank 4 that falls into the isolation box 7: an inert gas storage capsule 101 is arranged on the bottom surface of the inner cavity of the receiving tube 10, a flange seat 102 is fixedly connected to the outer surface of the upper end of the receiving tube 10, a sliding sleeve 104 is movably installed on the inner side of the flange seat 102, an outer edge is fixedly installed on the upper end of the sliding sleeve 104, and an arc-shaped spring piece 103 is fixedly connected to the lower surface of the outer edge. The arc-shaped spring piece 103 is provided with multiple groups and is equidistantly arranged in an array about the central axis of the sliding sleeve 104, and the other ends of the arc-shaped spring pieces 103 are respectively The sliding sleeve 104 is fixedly connected to the upper surface of the flange seat 102; a puncture assembly is arranged on the inner side of the sliding sleeve 104, and the puncture assembly includes a connecting plate 105 and a conical cover 106. The conical cover 106 is fixedly installed on the lower surface of the connecting plate 105, and the outer surface of the connecting plate 105 is fixedly connected to the inner ring surface of the sliding sleeve 104. An escape hole 108 is opened on the inner wall of the conical cover 106, and a circular through hole is opened on the central inner wall of the connecting plate 105. A ejector pin 107 is fixedly installed on the lower end of the conical cover 106, and the outer surface of the ejector pin 107 is movably connected to the upper surface of the inert gas storage capsule 101;

[0047] When a single capacitor bank 4 fails, the capacitor bank 4 falls into the isolation box 7 as a whole, and the mounting frame 5 at this time slides on the inner wall of the avoidance groove 30 and is located at the front and rear sides of the isolation box 7. It should be noted that the mounting frame 5 at this time not only satisfies the assembly connection of the capacitor bank 4, but also can form a lock with the reset avoidance component, and can block the front and rear sides of the isolation box 7 after the capacitor bank 4 falls completely, thereby reducing the entry of oxygen into the isolation box 7 to a certain extent and avoiding the expansion of the fire; the bottom end of the capacitor bank 4 contacts the surface of the isolation bottom plate 9, and at this time the top end of the sliding sleeve 104 is first released from the bottom end of the capacitor bank 4, and the sliding sleeve 104 slides on the inner side of the flange seat 102, and the arc The shrapnel 103 is elastically deformed as the sliding sleeve 104 is pressed downward. Then, the connecting plate 105 and the conical cover 106 follow the downward movement of the sliding sleeve 104, and the ejector pin 107 moves downward for a distance to puncture the top of the inert gas storage capsule 101, thereby achieving the escape of the inert gas inside the inert gas storage capsule 101, and the inert gas rises from the escape hole 108 and the circular through hole to ensure that the inert gas fills the inner cavity of the isolation box 7. The released inert gas dilutes the oxygen concentration in the fire extinguishing area, thereby extinguishing the flame. When the oxygen concentration drops to a certain level, the flame will not be able to continue to burn, so the fire can be controlled in time to avoid affecting the capacitor group 4 and surrounding electrical components on the side.

[0048] Embodiment 6, refer to the attached Figure 1-13 Based on the fifth embodiment, a method for combining a combined low-voltage reactive power compensation device comprises the following steps:

[0049] S1, install the capacitor groups 4 separately and install heat sinks 8 between adjacent capacitor groups 4;

[0050] S2. When the capacitor bank 4 fails and its temperature exceeds a predetermined threshold, the fuse release assembly installed on the inner side of the mounting side plate 6 is activated by the high temperature, releasing the restriction on the T-shaped locking block 62;

[0051] S3, after the fuse is released, the T-shaped lock block 62 retracts rapidly under the action of the reset avoidance assembly, and is freed from the restriction on the mounting frame 5, so that the capacitor bank 4 falls into the isolation box 7 below under the action of gravity;

[0052] S4. When the capacitor bank 4 falls into the isolation box 7, its bottom contacts the isolation bottom plate 9 and triggers the puncture assembly, puncturing the inert gas storage capsule 101 to release the inert gas, which fills the inner cavity of the fire extinguishing cavity isolation box 7 and controls the fire in time.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined low-voltage reactive power compensation device, comprising a low-voltage reactive power compensation device body (1) and a capacitor bank (4), characterized in that: An assembly frame (2) is installed inside the low-voltage reactive power compensation device body (1), a fixed cross bar (3) is fixedly connected to the outer surface of the assembly frame (2), a high-temperature protection mechanism is arranged on the fixed cross bar (3), and the high-temperature protection mechanism includes a mounting frame (5) and an isolation box (7), an avoidance groove (30) is opened on the inner wall of the fixed cross bar (3), the capacitor group (4) is fixedly installed on the inner side of the mounting frame (5), and heat sinks (8) are fixedly installed on both sides of the capacitor group (4), and the heat sinks (8) are fixedly installed on the inner side of the mounting frame (5). The isolation box (7) is fixedly mounted on the inner side of the fixed cross bar (3), and the isolation box (7) is fixedly mounted directly below the mounting frame (5). An isolation bottom plate (9) is fixedly mounted on the bottom surface of the inner cavity of the isolation box (7). A receiving groove (90) is provided on the inner wall of the upper end of the isolation bottom plate (9). A fire extinguishing mechanism is provided on the inner surface of the receiving groove (90), and the fire extinguishing mechanism includes a receiving tube (10). The outer surfaces of both sides of the mounting frame (5) are respectively provided with mounting side plates (6), and the mounting side plates (6) are fixedly mounted on the upper surface of the fixed cross bar (3).

2. A combined low-voltage reactive power compensation device according to claim 1, characterized in that: A convex plate (61) is fixedly connected to the outer surface of the mounting side plate (6), a reserved groove (60) is provided on the inner wall of the mounting side plate (6), a T-shaped locking block (62) is slidably installed on the inner wall of the reserved groove (60), the T-shaped locking block (62) is in a "T"-shaped block structure as a whole, a trapezoidal groove (620) is provided on the inner wall of one end of the T-shaped locking block (62), and a fuse release assembly is movably connected inside the trapezoidal groove (620).

3. A combined low-voltage reactive power compensation device according to claim 2, characterized in that: The fuse release assembly comprises a lead plate (63) and a trapezoidal plug-in block (632); the outer surface of the trapezoidal plug-in block (632) is movably plugged into the inner surface of the trapezoidal slot (620); the lead plate (63) is fixedly mounted on the inner outer surface of the mounting side plate (6); one end of the lead plate (63) is fixedly connected with a fuse piece (631) and a shape memory alloy (633); two groups of the shape memory alloy (633) are provided and are symmetrically distributed about the horizontal central axis of the fuse piece (631); the other ends of the fuse piece (631), i.e., the shape memory alloy (633), are respectively fixedly connected to the outer surface of the trapezoidal plug-in block (632).

4. A combined low-voltage reactive power compensation device according to claim 3, characterized in that: A reset avoidance component is provided at one end of the T-shaped locking block (62) away from the trapezoidal plug block (632), and the reset avoidance component includes a reset spring (621). Two groups of reset springs (621) are provided, and the outer surfaces of one end of the two groups of reset springs (621) are fixedly connected to the outer surface of the T-shaped locking block (62), and the other ends of the reset springs (621) are respectively fixedly connected to the inner surface of the convex plate (61).

5. The combined low-voltage reactive power compensation device according to claim 1 is characterized in that: The mounting bracket (5) is integrally in the shape of a "C"-shaped plate structure. The outer surfaces of both ends of the mounting bracket (5) are respectively slidably connected to the inner sides of the mounting side plates (6). Side grooves (50) are respectively formed on the outer surfaces of both sides of the mounting bracket (5). A slot (500) is formed through the lower end of the side groove (50). The inner surfaces of the slot (500) and the side groove (50) are respectively movably connected to the outer surface of the T-shaped lock block (62).

6. A combined low-voltage reactive power compensation device according to claim 5, characterized in that: Mounting seats one (41) and two (42) are respectively movably mounted on the outer surfaces of the upper ends of the mounting bracket (5). Fixing bolts (43) respectively penetrate through both ends of the mounting seat one (41) and the mounting seat two (42). The mounting seat one (41) and the mounting seat two (42) are fixedly connected through the fixing bolts (43).

7. A combined low-voltage reactive power compensation device according to claim 1, characterized in that: An inert gas storage bladder (101) is arranged on the bottom surface of the inner cavity of the receiving cylinder (10). A flange seat (102) is fixedly connected to the outer surface of the upper end of the receiving cylinder (10). A sliding sleeve (104) is movably mounted inside the flange seat (102). An outer edge is fixedly mounted on the upper end of the sliding sleeve (104). An arc-shaped elastic piece (103) is fixedly connected to the lower surface of the outer edge. A plurality of groups of arc-shaped elastic pieces (103) are arranged and are equally spaced in an array about the central axis of the sliding sleeve (104). The other ends of the arc-shaped elastic pieces (103) are respectively fixedly connected to the upper surface of the flange seat (102).

8. A combined low-voltage reactive power compensation device according to claim 7, characterized in that: A puncturing assembly is arranged inside the sliding sleeve (104). The puncturing assembly includes a connecting plate (105) and a conical cover (106). The conical cover (106) is fixedly mounted on the lower surface of the connecting plate (105). The outer surface of the connecting plate (105) is fixedly connected to the inner ring surface of the sliding sleeve (104). Escape holes (108) are formed on the inner wall of the conical cover (106). A circular through hole is formed on the central inner wall of the connecting plate (105). A thimble (107) is fixedly mounted at the lower end of the conical cover (106). The outer surface of the thimble (107) is movably connected to the upper surface of the inert gas storage bladder (101).

9. A method for combining a combined low-voltage reactive power compensation device, which is implemented based on a combined low-voltage reactive power compensation device according to any one of claims 1 to 8, characterized in that: The combination method of the combined low-voltage reactive power compensation device includes the following steps: S1. The capacitor banks (4) are installed separately at intervals, and heat dissipation plates (8) are installed between adjacent capacitor banks (4). S2. When a capacitor bank (4) fails and its temperature exceeds a preset threshold, the fuse release assembly installed inside the mounting side plate (6) is activated by the high temperature and releases the restriction on the T-shaped lock block (62). S3. After the fuse is released, the T-shaped lock block (62) quickly retracts under the action of the reset and avoidance assembly, disengaging the restriction on the mounting bracket (5), causing the capacitor bank (4) to fall into the lower isolation box (7) under the action of gravity. S4. When the capacitor bank (4) falls into the isolation box (7), its bottom contacts the isolation bottom plate (9) and triggers the puncturing assembly, puncturing the inert gas storage bladder (101) to release inert gas, filling the inner cavity of the fire extinguishing chamber isolation box (7), and controlling the fire in a timely manner.

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