Electrical control cabinet for reducing low-voltage reactive compensation capacity of converter dry dedusting system
By designing an electrical control cabinet in the converter dry dust removal system and adding electrical components such as current transformers, the problems of rapid commissioning and capacity selection of low-voltage reactive compensation devices were solved, and safety, stability and economy were improved.
Patent Information
- Application Number
- CN202421410014.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-06-19
AI Technical Summary
In the existing converter dry dust removal system, the low-voltage distribution system is not equipped with reactive power compensation or is equipped with reactive power compensation, which results in large power factor fluctuations, uneconomical capacity selection of reactive power compensation devices, or untimely automatic switching.
An electrical control cabinet is designed for a converter dry dust removal system to reduce the low-voltage reactive compensation capacity. By adding electrical components such as current transformers, intermediate relays, and fuses, the reactive compensation device can be quickly put into use and its capacity can be reduced.
The safety, stability, rapid response and economy of the converter dry dust removal power distribution system are improved, the selection capacity of the reactive compensation device is reduced, the power loss is reduced, and the power transmission capacity of the equipment is improved.
Smart Images
Figure CN223309425U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of converter dry dust removal systems, in particular to an electrical control cabinet for reducing low-voltage reactive compensation capacity of a converter dry dust removal system. Background Art
[0002] 1. Existing technology:
[0003] The current status of low-voltage reactive power compensation device for dry-process converter dust removal is as follows:
[0004] 1) The low-voltage distribution system is not equipped with reactive power compensation: Some converter steel mills have dry dust removal low-voltage distribution systems equipped with power transformers. No reactive power compensation device is configured on the low-voltage side of the power transformer. In order to save investment costs, the low-voltage side is compensated entirely by the reactive power compensation device on the high-voltage side.
[0005] 2) Reactive compensation configuration for low-voltage power distribution system: Some converter steel mills have dry dust removal low-voltage power distribution systems equipped with power transformers, and reactive compensation devices are installed on the low-voltage side of the power transformers. In the single-busbar segmented power distribution scheme, reactive compensation devices are installed on the low-voltage sides of the two transformers.
[0006] 2. Shortcomings of existing technology:
[0007] 1) The low-voltage power distribution system lacks reactive power compensation: During the steelmaking process, the dry dust removal system operates at high load; during non-smelting periods, it operates in energy-saving mode. This results in significant fluctuations in the converter dry dust removal power factor, necessitating the installation of a low-voltage reactive power compensation device on the local power supply side to achieve rapid switching.
[0008] 2) Reactive compensation configuration method for low-voltage distribution system: In the single-busbar segmented distribution scheme, the capacity of a single transformer must meet the load of all equipment in the two sections. There are two ways to select reactive compensation devices: one is to select the capacity of the reactive compensation device according to the transformer capacity. Although this can meet the load of all equipment when one transformer fails, the other transformer will be used to compensate for a failure. However, when the two transformers are operating normally, the capacity of the reactive compensation device will be too large, which is not economical. The other is to select the capacity of the reactive compensation according to the capacity calculated based on the actual load. Although this is economical, once one transformer fails, the other transformer will be used to compensate for the load of all equipment. The reactive compensation device in the section where the transformer fails cannot be automatically and quickly put into operation, and on-site personnel must go to the site to manually operate it.
[0009] Therefore, an electrical control cabinet for reducing the low-voltage reactive compensation capacity of a converter dry dust removal system is proposed. Utility Model Content
[0010] The utility model aims to solve the problems raised in the background technology, and provides an electrical control cabinet for reducing the low-voltage reactive power compensation capacity of a converter dry dust removal system.
[0011] The specific technical solutions are as follows:
[0012] An electrical control cabinet for reducing the low-voltage reactive power compensation capacity of a converter dry dust removal system, comprising: an electrical control cabinet body, a cabinet door is hinged to the front of the electrical control cabinet body, and a mounting plate is fixedly installed inside the electrical control cabinet body. A control board is installed on the mounting plate through a plurality of locking members, and a control circuit for reducing the low-voltage reactive power compensation capacity of the converter dry dust removal system is provided on the control board.
[0013] As a preferred solution of the utility model, each group of the locking members includes a U-shaped fixing block, a plug rod, a handle, a locking rod and a spring. The U-shaped fixing blocks are fixedly installed on the front of the mounting plate, and a jack is centrally opened on the U-shaped fixing block. A locking hole is opened inside the jack. The plug rod passes through the control board and the jack in sequence. The handle is fixedly installed at one end of the plug rod away from the mounting plate. The locking rod is fixedly installed at the other end of the plug rod, and the locking rod can pass through the jack and be stuck in the locking hole. The spring is sleeved on the plug rod. The spring is located between the control board and the handle and is in a compressed state. Under the action of the spring, the locking rod can be stably stuck in the locking hole.
[0014] As a preferred solution of the utility model, the jack and the locking hole are arranged in a cross shape.
[0015] As a preferred solution of the utility model, through holes for the plug rod to pass through are opened on the control board.
[0016] As a preferred solution of the utility model, a dead bolt is installed on the cabinet door.
[0017] As a preferred solution of the utility model, a transparent organic glass plate is embedded on the cabinet door.
[0018] As a preferred solution of the utility model, a wire passing hole is provided on the side wall of the electrical control cabinet body.
[0019] As a preferred solution of the utility model, a plurality of heat dissipation holes are provided on the side wall of the electrical control cabinet body near its bottom, and a housing is fixedly installed on the top of the electrical control cabinet body. The housing is connected to the heat dissipation holes through the space inside the electrical control cabinet body. A heat dissipation fan is fixedly installed inside the housing, and a ventilation port is reserved on the side wall of the housing. A filter screen is embedded in the ventilation port.
[0020] As a preferred solution of the present invention, a lighting box is fixedly installed inside the electrical control cabinet above the control panel, and a lighting tube is installed in the lighting box.
[0021] As a preferred solution of the present invention, a lifting ring is fixedly installed on the top of the electrical control cabinet, and a supporting foot is fixedly installed on the bottom of the electrical control cabinet.
[0022] The utility model has the following beneficial effects:
[0023] The utility model provides an electrical control cabinet for reducing the low-voltage reactive compensation capacity of a converter dry dust removal system. A control circuit for reducing the low-voltage reactive compensation capacity of the converter dry dust removal system is provided on a control panel. The control circuit for reducing the low-voltage reactive compensation capacity of the converter dry dust removal system effectively solves the problem of rapid investment in the reactive compensation device and ensures a reduction in the capacity selection of the reactive compensation device by adding electrical components such as current transformers, intermediate relays, and fuses, thereby improving the safety, stability, rapid response, and economy of the converter dry dust removal power distribution system. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 A schematic diagram of the structure of an electrical control cabinet for reducing the low-voltage reactive compensation capacity of a converter dry dust removal system provided by an embodiment of the utility model;
[0025] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;
[0026] Figure 3 A schematic diagram of the partial structure of an electrical control cabinet for reducing the low-voltage reactive compensation capacity of a converter dry dust removal system provided by an embodiment of the utility model;
[0027] Figure 4 A schematic diagram of the explosion structure of a locking member in an electrical control cabinet for reducing the low-voltage reactive compensation capacity of a converter dry dust removal system provided by an embodiment of the utility model;
[0028] Figure 5 The circuit of the electrical control cabinet for reducing the low-voltage reactive compensation capacity of the converter dry dust removal system provided by the embodiment of the utility model Figure 1 ;
[0029] Figure 6 The circuit of the electrical control cabinet for reducing the low-voltage reactive compensation capacity of the converter dry dust removal system provided by the embodiment of the utility model Figure 2 ;
[0030] Figure 7 The circuit of the electrical control cabinet for reducing the low-voltage reactive compensation capacity of the converter dry dust removal system provided by the embodiment of the utility model Figure 3 .
[0031] In the attached figure:
[0032] 1. Electrical control cabinet; 2. Cabinet door; 3. Transparent organic glass plate; 4. Lighting box; 5. Mounting plate; 6. Locking piece; 601. U-shaped fixing block; 602. Insert rod; 603. Handle; 604. Spring; 605. Locking rod; 606. Socket; 607. Locking hole; 7. Control panel; 8. Threading hole; 9. Hanging ring; 10. Ventilation port; 11. Casing; 12. Heat dissipation hole; 13. Support leg; 14. Concealed lock. DETAILED DESCRIPTION
[0033] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.
[0034] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.
[0035] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0036] In the description of this utility model, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.
[0037] Example
[0038] The converter dry dust removal system provided in this embodiment reduces the electrical control cabinet of the low-voltage reactive compensation capacity, such as Figure 1-Figure 7 As shown in the figure, it includes: an electrical control cabinet body 1, a cabinet door 2 is hinged to the front of the electrical control cabinet body 1, and a mounting plate 5 is fixedly installed inside the electrical control cabinet body 1. A control board 7 is installed on the mounting plate 5 through multiple locking members 6, and the control board 7 has a control circuit for reducing the low-voltage reactive power compensation capacity of the converter dry dust removal system.
[0039] Specifically, in this embodiment, each set of locking members 6 includes a U-shaped fixing block 601, a plug rod 602, a handle 603, a locking rod 605 and a spring 604. The U-shaped fixing blocks 601 are fixedly installed on the front of the mounting plate 5, and a jack 606 is centrally opened on the U-shaped fixing block 601. A locking hole 607 is opened inside the jack 606. The plug rod 602 passes through the control board 7 and the jack 606 in sequence. The handle 603 is fixedly installed at one end of the plug rod 602 away from the mounting plate 5. The locking rod 605 is fixedly installed at the other end of the plug rod 602, and the locking rod 605 can pass through the jack 606 and be stuck in the locking hole 607. The spring 604 is sleeved on the plug rod 602. The spring 604 is located between the control board 7 and the handle 603 and is in a compressed state. Under the action of the spring 604, the locking rod 605 can be stably stuck in the locking hole 607. <00,00095>
[0040] When the locking member 6 is in use, when installing the control board 7, hold the handle 603 and turn the locking rod 605 through the jack 606 and release it to be stuck in the locking hole 607. Under the action of the spring 604, the locking rod 605 can be stably stuck in the locking hole 607, and the control board 7 can be quickly installed inside the electrical control cabinet body 1;
[0041] When disassembling the control board 7, hold the handle 603 and press the plug rod 602 to make the locking rod 605 disengage from the locking hole 607 and turn so that the locking rod 605 can pass through the jack 606, and pull out the locking rod 605 from the jack 606 to quickly remove the control board 7.
[0042] Specifically, in this embodiment, in order to conform to the conventional design and facilitate the simplification of the operation, the jack 606 and the locking hole 607 are arranged in a cross shape.
[0043] Specifically, in this embodiment, in order to facilitate the installation of the locking member 6 on the control board 7, a through hole for the plug rod 602 to pass through is opened on the control board 7.
[0044] Specifically, in this embodiment, in order to facilitate the locking of the cabinet door 2, a mortise lock 14 is installed on the cabinet door 2.
[0045] Specifically, in this embodiment, in order to facilitate the observation of the situation inside the electrical control cabinet body 1, a transparent organic glass plate 3 is embedded on the cabinet door 2.
[0046] Specifically, in this embodiment, in order to facilitate wiring, a wire threading hole 8 is provided on the side wall of the electrical control cabinet 1 .
[0047] Specifically, in this embodiment, in order to dissipate heat inside the electrical control cabinet 1, a plurality of heat dissipation holes 12 are provided on the side wall of the electrical control cabinet 1 near its bottom, and a shell 11 is fixedly installed on the top of the electrical control cabinet 1, and the shell 11 is connected to the heat dissipation holes 12 through the space inside the electrical control cabinet 1, and a cooling fan is fixedly installed inside the shell 11, and a ventilation hole 10 is reserved on the side wall of the shell 11. In order to prevent dust from entering, a filter is embedded in the ventilation hole 10, and the provided cooling fan is used to cooperate with the plurality of heat dissipation holes 12 and the ventilation hole 10 to dissipate heat inside the electrical control cabinet 1.
[0048] Specifically, in this embodiment, in order to provide lighting for the interior of the electrical control cabinet 1 for easy maintenance, a lighting box 4 is fixedly installed above the control board 7 inside the electrical control cabinet 1, and a lighting tube is installed in the lighting box 4.
[0049] Specifically, in this embodiment, in order to facilitate the lifting of the electrical control cabinet, a lifting ring 9 is fixedly installed on the top of the electrical control cabinet body 1, and in order to facilitate the stable placement of the electrical control cabinet, a supporting leg 13 is fixedly installed on the bottom of the electrical control cabinet body 1.
[0050] In summary, the electrical control cabinet for reducing the low-voltage reactive power compensation capacity of the converter dry dust removal system provided in this embodiment, and the converter dry dust removal system on the control board 7 for reducing the low-voltage reactive power compensation capacity control circuit are specifically as follows: Figure 5-7 As shown, the current transformers for the incoming lines of Section I and Section II, as well as the current transformers above and below the bus tie circuit breaker, intermediate relays, fuses, and other electrical components are added to the original power distribution system. The auxiliary normally closed point of the incoming line breaker 1QF1 of Section I is connected in series from the auxiliary normally open point of the bus tie circuit breaker 3QF1 to the intermediate relay coil 1KA; the auxiliary normally closed point of the incoming line breaker 2Q1F of Section II is connected in series from the auxiliary normally open point of the bus tie circuit breaker 3QF1 to the intermediate relay coil 2KA.
[0051] When the distribution system section I and section II operate independently, the 1KA and 2KA coils shall not be energized, the current measured by the current transformer 1LHd (1A421, 1N421) flows into the controller (1PQM), and the current measured by the current transformer 2LHd (2A421, 2N421) flows into the controller (2PQM), and they operate independently; when a problem occurs in section I of the distribution system, the busbar is put into operation, and section II is fully loaded, the 1KA coil is energized, the 2KA coil is not energized, and the current measured by the current transformer 3LHd (3A431, 3N431) flows into the controller ( 1PQM), the current measured by current transformer 2LHd (2A421, 2N421) flows into the controller (2PQM); when a problem occurs in section II of the distribution system, the busbar is put into operation, and section I is fully loaded, the 2KA coil is energized and the 1KA coil is not energized, the current measured by current transformer 1LHd (1A421, 1N421) flows into the controller (1PQM), and the current measured by current transformer 3LHe (3A441, 3N441) flows into the controller (2PQM); the two-section reactive power compensation device is automatically switched according to the power factor setting value.
[0052] It can reduce the capacity of reactive compensation device selection, save investment costs, reduce power loss, improve voltage quality, increase equipment power transmission capacity, and improve the safety and stability of the distribution system.
[0053] The above are only preferred embodiments of the present invention and do not limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.
Claims
1. An electrical control cabinet for reducing the low-voltage reactive compensation capacity of a converter dry dust removal system, characterized in that: Including: An electrical control cabinet body (1), a cabinet door (2) is hinged to the front of the electrical control cabinet body (1), and a mounting plate (5) is fixedly installed inside the electrical control cabinet body (1). A control board (7) is installed on the mounting plate (5) through a plurality of locking members (6). The control board (7) has a control circuit for reducing the low-voltage reactive power compensation capacity of the converter dry dust removal system. The control circuit for reducing the low-voltage reactive power compensation capacity of the converter dry dust removal system on the control board (7) adds current transformers for the incoming line of section I, current transformers for the incoming line of section II, current transformers above and below the bus-coupler circuit breaker, intermediate relays, and fuses in the original power distribution system. Connect the auxiliary normally open point of the bus-coupler circuit breaker 3QF1 in series with the auxiliary normally closed point of the incoming line circuit breaker 1QF1 of section I to the coil of the intermediate relay 1KA; connect the auxiliary normally open point of the bus-coupler circuit breaker 3QF1 in series with the auxiliary normally closed point of the incoming line circuit breaker 2Q1F of section II to the coil of the intermediate relay 2KA.
2. The electrical control cabinet for reducing low-voltage reactive power compensation capacity of the converter dry dust removal system according to claim 1 is characterized in that: Each of the locking members (6) includes a U-shaped fixing block (601), a plug rod (602), a handle (603), a locking rod (605), and a spring (604). The U-shaped fixing blocks (601) are fixedly installed on the front of the mounting plate (5), and a jack (606) is centrally formed on the U-shaped fixing block (601). A locking hole (607) is formed inside the jack (606). The plug rod (602) passes through the control board (7) and the jack (606) in sequence. The handle (603) is fixedly installed at one end of the plug rod (602) away from the mounting plate (5). The locking rod (605) is fixedly installed at the other end of the plug rod (6), and the locking rod (605) can pass through the jack (606) and be stuck in the locking hole (607). The spring (604) is sleeved on the plug rod (602). The spring (604) is located between the control board (7) and the handle (603) and is in a compressed state. Under the action of the spring (604), the locking rod (605) can be stably stuck in the locking hole (607).
3. The electrical control cabinet for reducing low-voltage reactive power compensation capacity of the converter dry dust removal system according to claim 2 is characterized in that: The jack (606) and the locking hole (607) are arranged in a cross shape.
4. The electrical control cabinet for reducing low-voltage reactive power compensation capacity of a converter dry dust removal system according to claim 2 is characterized in that: A through hole for the plug rod (602) to pass through is formed on the control board (7).
5. The electrical control cabinet for reducing the low-voltage reactive compensation capacity of the converter dry dust removal system according to any one of claims 1 to 4, characterized in that: A dead bolt (14) is installed on the cabinet door (2).
6. The electrical control cabinet for reducing low-voltage reactive power compensation capacity of the converter dry dust removal system according to claim 5 is characterized in that: A transparent organic glass plate (3) is embedded on the cabinet door (2).
7. The electrical control cabinet for reducing low-voltage reactive power compensation capacity of a converter dry dust removal system according to claim 1 is characterized in that: A wire passing hole (8) is provided on the side wall of the electrical control cabinet body (1).
8. The electrical control cabinet for reducing low-voltage reactive power compensation capacity of a converter dry dust removal system according to claim 7 is characterized in that: A plurality of heat dissipation holes (12) are provided near the bottom of the side wall of the electrical control cabinet body (1). A housing (11) is fixedly installed on the top of the electrical control cabinet body (1). The housing (11) is connected to the heat dissipation holes (12) through the space inside the electrical control cabinet body (1). A heat dissipation fan is fixedly installed inside the housing (11). A ventilation port (10) is reserved on the side wall of the housing (11), and a filter net is embedded in the ventilation port (10).
9. The electrical control cabinet for reducing low-voltage reactive power compensation capacity of a converter dry dust removal system according to claim 8, characterized in that: A lighting box (4) is fixedly installed above the control panel (7) inside the electrical control cabinet (1), and a lighting tube is installed in the lighting box (4).
10. The electrical control cabinet for reducing low-voltage reactive power compensation capacity of a converter dry dust removal system according to claim 9, characterized in that: A lifting ring (9) is fixedly mounted on the top of the electrical control cabinet (1), and a supporting foot (13) is fixedly mounted on the bottom of the electrical control cabinet (1).