Alternating-current low-voltage ride-through device

Abstract

The utility model discloses an alternating-current low-voltage ride-through device, and relates to the technical field of electronics. The cabinet comprises two bases, wherein two cabinet bodies are fixed on the upper sides of the two bases. The first supporting blocks and the second supporting blocks correspond to the grooves, so that the two plate bodies can generate a clamping relation, the two cabinet bodies are connected together in parallel, multi-cabinet combination work is achieved, seamless replacement with an original device can be achieved in use, the two plate bodies are clamped and fixed through the clamping assemblies, and the clamping effect is good. The two cabinet bodies are connected more firmly, the stability of the two cabinet bodies is improved, the width of each cabinet body is set to be 400 mm, capacity-increasing replacement use of a conventional 800-mm cabinet body can be met, reasonability of the internal operation space of the device is fully considered, the occupied space of equipment is effectively reduced, the space problem of transformation and capacity-increasing of old equipment is solved, and the service life of the equipment is prolonged. The application scene of the product is improved, and meanwhile the investment cost of a user is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the field of electronic technology, and in particular relates to an AC low voltage ride through device. Background Art

[0002] The inverters of the coal feeders and air preheaters in the thermal power plant are powered by the plant's AC380V power when working normally. When the grid voltage drops temporarily, the inverter will be shut down for protection, which will cause a bigger accident. In order to avoid the protection shutdown caused by voltage drop, a low voltage ride-through device is introduced to provide DC power at the DC bus end of the inverter when the voltage drops temporarily, so as to survive the voltage drop and ensure normal production.

[0003] The low voltage ride-through devices currently on the market are generally single cabinets corresponding to single inverters. Our company has also put into operation a large number of such products in the market. With the continuous development of electrical equipment, the original equipment is facing partial equipment transformation and upgrading due to aging or efficiency, capacity and other issues. However, the on-site space of some power plants is limited, and the overall demolition and transformation takes a long time and is very expensive. It is inevitable to consider the use of on-site space when equipment is transformed or increased in capacity. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an AC low voltage ride through device to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0006] An AC low voltage ride-through device, comprising: two bases, two cabinets are fixed on the upper sides of the two bases, plates are fixed on the adjacent sides of the two cabinets, a groove is provided in the middle of one side of one of the plates, a first support block is fixed on one side of the other plate, a second support block is slidably matched with the middle of one side of the first support block, and the first support block and the second support block both correspond to the groove;

[0007] A clamping assembly is installed at the lower end of the two plate bodies, and a cold-rolled plate corresponding to the lower end of the cabinet is installed at the upper end of the base. Forklift holes are opened on the front sides of the two bases, and multiple incoming cable holes are penetrated on the left and right sides of the two bases, and the relative inner sides of the incoming cable holes are elastically matched with dust-proof soft plates, and the dust-proof soft plates are made of insulating material. The width of the cabinet is set to 400mm.

[0008] Optionally, the middle part of the other plate body is rotatably equipped with a worm, the middle part of the first support block is rotatably equipped with a rotating rod, end face gears and worm wheels are respectively fixed on the circumferential sides of both ends of the rotating rod, the internal thread of the second support block is equipped with a screw, and a spur gear is fixed at one end of the screw.

[0009] By adopting the above technical solution, a worm that rotates and cooperates in the middle of the other plate body is used to make the worm mesh with the worm wheel and drive the rotating rod to rotate, so that the rotating rod drives the end gear to rotate synchronously, so that the end gear meshes with the spur gear and rotates, thereby driving the screw rod to engage with the second support block thread, changing the length between the second support block and the first support block, so as to better clamp and fix the groove, complete the parallel connection of the two cabinets, and make the connection between the two cabinets more stable.

[0010] Optionally, the spur gear and the end face gear are both rotatably fitted inside the first support block, and the worm is meshed with the worm wheel, and the end face gear is meshed with the spur gear.

[0011] By adopting the above technical solution, the worm and the worm wheel are meshed, so that the rotating rod drives the end gear and the spur gear to mesh and rotate, thereby driving the screw rod to engage with the second support block thread, so that the second support block slides and fits in the middle of one end of the first support block, so that the length between the second support block and the first support block can be adjusted according to whether the two cabinets are connected in parallel.

[0012] Optionally, the clamping assembly includes rectangular grooves respectively opened at the bottom of the front and rear sides of the two plate bodies, a rectangular plate fixed to the front and rear sides of one of the bases, a bidirectional screw rotatably engaged with the relative inner sides of the two rectangular plates, and two U-shaped clips threadedly engaged with the circumferential sides of the bidirectional screws, and the U-shaped clips correspond to the two rectangular grooves on the adjacent sides.

[0013] By adopting the above technical solution and utilizing the bidirectional screw, the two U-shaped clamps can be driven to move relative to each other synchronously, so that the two U-shaped clamps extend out or retract into the two rectangular grooves on the adjacent sides, thereby clamping and connecting the two panels, and further improving the stability of the two cabinets when connected in parallel.

[0014] Optionally, a motor is fixed in the middle of one side of the rectangular plate, an output end of the motor is fixed to one end of the bidirectional screw, and the cabinet and the base are both made of channel steel.

[0015] By adopting the above technical solution, a motor is used to drive the bidirectional screw to rotate, so that the bidirectional screw cooperates with the two U-shaped clamp threads, thereby driving the two U-shaped clamps to move away from or approach each other, thereby realizing the parallel connection of two cabinets. In addition, the cabinet and the base are both made of channel steel, which can avoid the cabinet and the equipment therein from exerting a large pressure on the ground during use, causing it to sink or deform, thereby effectively enhancing the ground's bearing capacity.

[0016] Optionally, the front sides of the two bases are each provided with a protective plate corresponding to the forklift hole, and screws are fixed between the protective plate and the front sides of the base.

[0017] By adopting the above technical solution, the forklift hole is utilized so that the front end of the forklift can be extended into the forklift hole to move the cabinet, thereby improving the transportation efficiency of the cabinet. At the same time, the protective plate is provided to effectively prevent the use of the forklift hole from being affected by the accumulation of dust or dirt, thereby playing a protective role for the forklift hole.

[0018] Optionally, the front sides of the two cabinets are rotatably equipped with one-way doors, and indicator lights and touch screens are installed above the front sides of the one-way doors. The front sides above the two cabinets are fixed with door lintels, and the four diagonal positions of the upper sides are fixed with hanging rings.

[0019] By adopting the above technical solution and utilizing the indicator lights and touch screens provided on the upper front side of the one-way door, each cabinet can be installed with an independent control system, so that a single cabinet can be controlled independently, and two cabinets can be used in parallel as one-to-two or controlled separately, thus meeting various control requirements of different sites.

[0020] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described below at the same time:

[0021] 1. The first support block and the second support block are arranged to correspond to the grooves, so that the two plates can be connected in a snap-fit ​​relationship, thereby connecting the two cabinets in parallel and realizing multi-cabinet combination work, so that it can be seamlessly replaced with the original device, and the two plates can be clamped and fixed by the clamping components arranged at the lower ends of the two plates, so that the connection between the two cabinets is more firmly established, effectively increasing the stability of the two cabinets.

[0022] 2. The dustproof soft plate that is elastically matched on the inner side of the incoming cable hole can be fitted to the surrounding side of the cable according to the flexibility of the dustproof soft plate, effectively preventing dust from entering the inside of the incoming cable hole from the surrounding side of the cable, further strengthening the dust prevention at the incoming cable hole. In addition, the width of the cabinet is set to 400mm, which can not only meet the capacity expansion and replacement of conventional 800mm cabinets, but also fully consider the rationality of the internal operating space of the device itself, effectively reduce the space occupied by the equipment, solve the space problem of the transformation and capacity expansion of old equipment, improve the applicable scenarios of the product, and effectively reduce the user's investment cost.

[0023] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0025] Figure 1 It is a schematic diagram of the cabinet structure;

[0026] Figure 2 is a schematic diagram of the structure of the second support block;

[0027] Figure 3 for Figure 2 Schematic diagram of the structure at A in the middle;

[0028] Figure 4 It is a schematic diagram of the U-shaped clamp structure;

[0029] Figure 5 This is a schematic diagram of the dustproof soft board structure;

[0030] In the accompanying drawings, the list of components represented by each reference numeral is as follows: base 1; cabinet body 2; plate body 3; groove 4; first support block 5; second support block 6; forklift hole 7; incoming cable hole 8; dustproof soft plate 9; worm 10; rotating rod 11; end gear 12; worm wheel 13; screw 14; spur gear 15; rectangular groove 16; rectangular plate 17; bidirectional screw 18; U-shaped clip 19; motor 20; protective plate 21; one-way door 22; indicator light 23; door lintel 24.

[0031] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] The utility model will now be further described in detail with reference to the accompanying drawings.

[0033] See also Figure 1-5 As shown, in this embodiment, an AC low voltage ride-through device is provided, comprising: two bases 1, two cabinets 2 are fixed on the upper sides of the two bases 1, and plates 3 are fixed on the adjacent sides of the two cabinets 2, a groove 4 is provided in the middle of one side of one plate 3, a first support block 5 is fixed on one side of the other plate 3, a second support block 6 is slidably matched with the middle of one side of the first support block 5, and the first support block 5 and the second support block 6 correspond to the groove 4, so that the two plates 3 can generate a snap-fit ​​relationship, thereby connecting the two cabinets 2 in parallel, realizing the combination of multiple cabinets, and thus being able to be seamlessly replaced with the original device;

[0034] The lower ends of the two plate bodies 3 are equipped with clamping components, which can clamp and fix the two plate bodies 3, so that the connection between the two cabinets 2 is more firmly established, which effectively increases the stability of the two cabinets 2. The upper end of the base 1 is equipped with a cold-rolled plate corresponding to the lower end of the cabinet 2. The front sides of the two bases 1 are provided with forklift holes 7. The left and right sides of the two bases 1 are penetrated by multiple incoming cable holes 8, and the relative inner sides of the incoming cable holes 8 are elastically matched with dust-proof soft plates 9. The peripheral sides of the cables can be fitted according to the flexibility of the dust-proof soft plates 9, effectively preventing dust from entering the incoming cable holes 8 from the peripheral sides of the cables, further strengthening the dust prevention at the incoming cable holes 8. The dust-proof soft plates 9 are made of insulating material. The width of the cabinet 2 is set to 400mm, which can not only meet the capacity expansion and replacement of the conventional 800mm cabinet 2, but also fully consider the rationality of the internal operating space of the device itself, effectively reduce the space occupied by the equipment, solve the space problem of the transformation and capacity expansion of old equipment, improve the applicable scenarios of the product, and effectively reduce the investment cost of users.

[0035] The working principle of this device is as follows: when it is necessary to connect two cabinets 2 in parallel, the forklift extends the front end into the forklift hole 7, and drives one cabinet 2 to move to the side close to the other cabinet 2, and keeps it flush with the other cabinet 2, and then the forklift extends the front end out of the forklift hole 7. At this time, the first support block 5 and the second support block 6 extend into the groove 4 and are clamped and fixed, so that they are connected as a whole, thereby completing the parallel connection of the two cabinets 2, and then start the clamping assembly, which clamps and fixes the lower ends of the two plates 3, thereby further strengthening the firmness of the two cabinets 2 when connected in parallel. When wiring the incoming cable hole 8, the cable is extended into the incoming cable hole 8 through the dustproof soft board 9 and connected to it. At this time, the dustproof soft board 9 fits and clamps the surrounding side of the cable according to its own flexibility, effectively preventing dust from entering the incoming cable hole 8 through the cable.

[0036] It should be noted that all electrical devices involved in this application can be powered by batteries or external power supplies.

[0037] like Figure 3As shown, the middle part of the other plate body 3 of this embodiment is rotatably matched with a worm 10, the middle part of the first support block 5 is rotatably matched with a rotating rod 11, the circumferential sides of the two ends of the rotating rod 11 are respectively fixed with an end face gear 12 and a worm wheel 13, the internal thread of the second support block 6 is matched with a screw 14, and one end of the screw 14 is fixed with a spur gear 15; the spur gear 15 and the end face gear 12 of this embodiment are both rotatably matched with the inside of the first support block 5, and the worm 10 is meshed with the worm wheel 13, and the end face gear 12 is meshed with the spur gear 15. Among them, the worm 10 has a certain friction force when rotating with the other plate body 3, and can be rotated manually or installed with a motor for driving.

[0038] When the first support block 5 and the second support block 6 extend into the groove 4, one end of the worm 10 is manually rotated. At this time, the worm 10 engages and rotates with the worm wheel 13, driving the rotating rod 11 to rotate synchronously, so that the rotating rod 11 drives the end gear 12 to rotate synchronously, realizing the meshing rotation of the end gear 12 and the spur gear 15, thereby driving the screw 14 to rotate. At the same time, the screw 14 and the second support block 6 are threadedly matched to drive the second support block 6 to move to the side away from the first support block 5. At this time, the second support block 6 slides in the middle of one end of the first support block 5, which can change the length between the second support block 6 and the first support block 5, so as to better clamp and fix the groove 4 and complete the parallel connection of the two cabinets 2.

[0039] like Figure 4 As shown, the clamping assembly of this embodiment includes rectangular grooves 16 respectively opened at the bottom of the front and rear sides of the two plate bodies 3, rectangular plates 17 fixed to the front and rear sides of one base 1, bidirectional screws 18 rotatably engaged with the opposite inner sides of the two rectangular plates 17, and two U-shaped clips 19 threadedly engaged with the circumference of the bidirectional screws 18, and the U-shaped clips 19 correspond to the two rectangular grooves 16 on the adjacent sides; as shown in FIG. Figure 5 As shown, a motor 20 is fixed in the middle of one side of a rectangular plate 17 of this embodiment, the output end of the motor 20 is fixed to one end of a bidirectional screw 18, and the cabinet 2 and the base 1 are both made of channel steel.

[0040] When clamping the two plate bodies 3, the motor 20 is started first, and the output end of the motor 20 drives the bidirectional screw 18 to rotate, so that the bidirectional screw 18 is threadedly matched with the two U-shaped clips 19 and drives the two U-shaped clips 19 to approach each other, so that the two U-shaped clips 19 are respectively extended into the two rectangular grooves 16 on the adjacent sides, completing the clamping of the two plate bodies 3, making the two cabinets 2 more stable when connected in parallel.

[0041] like Figure 1As shown, the front sides of the two bases 1 of this embodiment are equipped with protective plates 21 corresponding to the forklift holes 7, and screws are fixed between the protective plates 21 and the front sides of the bases 1; the front sides of the cabinets 2 of this embodiment are rotatably matched with one-way doors 22, and indicator lights 23 and touch screens are installed above the front sides of the one-way doors 22. The front sides of the upper parts of the two cabinets 2 are fixed with door lintels 24, and the four diagonal parts of the upper sides are fixed with hanging rings 25. The cabinet 2 is a screen cabinet structure, and the internal structural parts of the cabinet 2 are 1.5mm cold-rolled steel plates, and the surface is electrostatically sprayed. The screen cabinet adopts single-sided operation and maintenance, the front and rear sides of the cabinet 2 are sealed plate structures, the bottom of the cabinet 2 is a channel steel base, and the overall IP level of the cabinet 2 is IP54.

[0042] When the forklift hole 7 is protected, the screws are passed through the protective plate 21 and connected to the front side of the base 1 to complete the protection of the forklift hole 7. At the same time, the indicator light 23 and the touch screen are installed above the front side of the one-way door 22, so that the operating status display, daily operation, historical data viewing, etc. of each functional module of the equipment are concentrated on the touch screen, which is convenient for personnel inspection and operation.

[0043] Example 1: A usage scenario of a cabinet 2;

[0044] The two cabinets 2 need to be disassembled. First, the motor 20 is started. The output end of the motor 20 drives the bidirectional screw 18 to rotate in the opposite direction, so that the bidirectional screw 18 is threadedly matched with the two U-shaped clips 19 and drives the two U-shaped clips 19 to move away from each other, so that the two U-shaped clips 19 extend out of the two rectangular grooves 16 on the adjacent sides, and the clamping of the two plate bodies 3 is cancelled. Then the worm 10 is rotated in the opposite direction, so that the worm 10 and the worm wheel 13 are meshed and rotated in the opposite direction, and the driving rod 11 is synchronously rotated in the opposite direction, so that the rotating rod 11 drives the end face gear 12 to rotate in the opposite direction synchronously, so that the end face gear 12 is meshed and rotated in the opposite direction with the spur gear 15, and the driving screw 14 is rotated in the opposite direction. At the same time, the screw 14 and the second support block 6 threaded cooperation drives the second support block 6 to move toward the side close to the first support block 5. At this time, the second support block 6 slides and cooperates with the middle part of one end of the first support block 5, and the length between the second support block 6 and the first support block 5 can be changed, thereby canceling the clamping fixation of the groove 4 and canceling the parallel connection of the two cabinets 2. Then the forklift extends into the forklift hole 7 and drives one cabinet 2 away from the other cabinet 2. At this time, the second support block 6 and the first support block 5 extend out of the groove 4, canceling the parallel connection of the two cabinets 2, and moving one cabinet 2 to the scene where it needs to be used. At the same time, each cabinet 2 is installed with an independent control system, which can realize independent control of a single cabinet and meet the needs of different on-site working conditions.

[0045] Embodiment 2: Usage scenario after two cabinets 2 are connected;

[0046] It is necessary to connect two cabinets 2 in parallel. First, the forklift extends into the forklift hole 7 and drives one cabinet 2 to move to the side close to the other cabinet 2 and keep it flush with the other cabinet 2. Then the forklift extends the front end out of the forklift hole 7. At this time, the second support block 6 and the first support block 5 extend into the groove 4 for clamping. At the same time, one end of the worm 10 is rotated. At this time, the worm 10 is meshed and rotated with the worm wheel 13, driving the rotating rod 11 to rotate synchronously, so that the rotating rod 11 drives the end face gear 12 to rotate synchronously, so that the end face gear 12 is meshed and rotated with the spur gear 15, driving the screw 14 to rotate, and at the same time, the screw 14 and the second support block 6 are threadedly matched to drive the second support block 6 to move to the side away from the first support block 5. At this time, the second support block 6 slides Cooperating with the middle part of one end of the first support block 5, the length between the second support block 6 and the first support block 5 can be changed, so as to better clamp and fix the groove 4, complete the parallel connection of the two cabinets 2, and start the motor 20 at the same time. The output end of the motor 20 drives the bidirectional screw 18 to rotate, so that the bidirectional screw 18 is threadedly matched with the two U-shaped clips 19 and drives the two U-shaped clips 19 to approach each other, so that the two U-shaped clips 19 extend into the two rectangular grooves 16 on the adjacent sides, complete the clamping of the two plates 3, so that the two cabinets 2 are more stable when connected in parallel. Each cabinet 2 is installed with an independent control system, which can realize independent control of a single cabinet and one-to-two or separate control of two cabinets in parallel, which can meet various control requirements of different sites.

[0047] The present invention is not limited to the above-mentioned implementation modes. Anyone should be aware of the structural changes made under the inspiration of the present invention. Any technical solution that is the same or similar to the present invention falls within the protection scope of the present invention. The technology, shape, and structure that are not described in detail in the present invention are all known technologies.

Claims

1. An AC low voltage ride through device, characterized in that: include: Two bases (1), two cabinets (2) are fixed on the upper sides of the two bases (1), and plates (3) are fixed on adjacent sides of the two cabinets (2), a groove (4) is provided in the middle of one side of one of the plates (3), a first support block (5) is fixed on one side of the other plate (3), a second support block (6) is slidably matched in the middle of one side of the first support block (5), and the first support block (5) and the second support block (6) both correspond to the groove (4); The lower ends of the two plate bodies (3) are provided with clamping assemblies, the upper end of the base (1) is provided with a cold-rolled plate corresponding to the lower end of the cabinet body (2), the front sides of the two bases (1) are provided with forklift holes (7), the left and right sides of the two bases (1) are penetrated with a plurality of incoming cable holes (8), and the relative inner sides of the incoming cable holes (8) are elastically matched with dustproof soft plates (9), the dustproof soft plates (9) are made of insulating material, and the width of the cabinet body (2) is set to 400 mm.

2. The AC low voltage ride through device according to claim 1, characterized in that: The middle part of the other plate body (3) is rotatably matched with a worm (10), the middle part of the first support block (5) is rotatably matched with a rotating rod (11), and the circumferential sides of both ends of the rotating rod (11) are respectively fixed with end face gears (12) and worm wheels (13), and the internal thread of the second support block (6) is matched with a screw rod (14), and one end of the screw rod (14) is fixed with a spur gear (15).

3. The AC low voltage ride through device according to claim 2, characterized in that: The spur gear (15) and the end face gear (12) are both rotatably fitted inside the first support block (5), and the worm (10) is meshed with the worm wheel (13), and the end face gear (12) is meshed with the spur gear (15).

4. The AC low voltage ride through device according to claim 1, characterized in that: The clamping assembly comprises rectangular grooves (16) respectively provided at the bottom of the front and rear sides of the two plate bodies (3), a rectangular plate (17) fixed to the front and rear sides of one of the bases (1), a bidirectional screw (18) rotatably engaged with the opposite inner sides of the two rectangular plates (17), and two U-shaped clips (19) threadedly engaged with the circumference of the bidirectional screw (18), wherein the U-shaped clips (19) correspond to the two rectangular grooves (16) on the adjacent sides.

5. The AC low voltage ride through device according to claim 4, characterized in that: A motor (20) is fixed in the middle of one side of the rectangular plate (17), the output end of the motor (20) is fixed to one end of the bidirectional screw (18), and the cabinet (2) and the base (1) are both made of channel steel.

6. The AC low voltage ride through device according to claim 1, characterized in that: The front sides of the two bases (1) are both provided with protective plates (21) corresponding to the forklift holes (7), and screws are fixed between the protective plates (21) and the front sides of the bases (1).

7. The AC low voltage ride through device according to claim 1, characterized in that: The front sides of the two cabinets (2) are both rotatably matched with one-way doors (22), and indicator lights (23) and touch screens are installed above the front sides of the one-way doors (22). Door lintels (24) are fixed to the front sides above the two cabinets (2), and hanging rings (25) are fixed at four diagonal positions on the upper sides.

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