An automatic commutation three-phase unbalance treatment device

Abstract

The application relates to the technical field of three-phase unbalance treatment devices, in particular to an automatic phase-changing three-phase unbalance treatment device, which comprises an intelligent main controller and an intelligent phase changer installed in a shell, a manual switching switch is arranged on the intelligent phase changer, first and second contacts are arranged on the intelligent phase changer, the first contact is connected with a phase line, the second contact is connected with a neutral line, the manual switching switch comprises a fixed sheet, a first pressing plate and a second pressing plate, the fixed sheet is connected with a live wire of a user end, compared with the traditional technology, even if the phase changer fails, the first and second lead screws can still be remotely controlled to rotate, so that the switching of different phase lines in the loop is completed, electricians do not need to manually handle the fault phase changer, the manual phase change of the electricians on the distribution transformer is replaced, and the regulation efficiency of three-phase load balance is improved.

Description

Technical Field

[0001] This invention relates to the field of three-phase imbalance control devices, and more particularly to an automatic phase-switching three-phase imbalance control device. Background Technology

[0002] When a low-voltage power grid is powered by a three-phase four-wire system, the presence of single-phase loads in the low-voltage distribution area inevitably causes an imbalance in the three-phase load. The traditional method is for an electrician to manually switch the phases at the commutator and manually adjust the three-phase load to restore balance. However, this adjustment method is time-consuming, labor-intensive, and inefficient.

[0003] To improve the efficiency of three-phase load balancing, automatic three-phase load regulating devices have been designed. These devices mainly consist of an intelligent main controller and an intelligent phase commutator. The main controller is installed on the outgoing side of the low-voltage distribution transformer, while the intelligent phase commutator is installed at the incoming line of the user. The main controller detects whether the three phases are balanced and, based on the load conditions of the three phases, controls the intelligent phase commutator at the user end to automatically switch phases, thereby balancing the three-phase load. Under normal operation, this type of automatic three-phase load regulating device can replace the electrician's manual phase switching of the phase commutator, improving the efficiency of three-phase load balancing to a certain extent. However, this automatic regulating device can also malfunction. After a malfunction, an electrician still needs to go to the faulty equipment to manually switch phases. Therefore, the efficiency of three-phase load balancing remains low in the event of a malfunction.

[0004] Therefore, it is necessary to propose an automatic phase-switching three-phase imbalance control device to improve the adjustment efficiency of three-phase load balance during manual phase-switching. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that existing three-phase load automatic adjustment devices still require manual adjustment during manual phase switching, resulting in low adjustment efficiency for three-phase load balance. The invention provides an automatic phase switching three-phase imbalance control device.

[0006] The technical solution of this invention is:

[0007] An automatic phase-switching three-phase imbalance control device includes an intelligent main controller and an intelligent phase commutator installed in a housing. The intelligent phase commutator is equipped with a manual switching switch and has a first contact and a second contact. The first contact is connected to the phase line, and the second contact is connected to the neutral line. The manual switching switch includes a fixing plate, a first pressure plate, and a second pressure plate. The fixing plate is connected to the live wire at the user end. The first pressure plate is located on one side of the first contact and is fixedly connected to the fixing plate. The second pressure plate is located on one side of the second contact and is connected to the neutral wire at the user end.

[0008] A fixed frame is fixedly connected inside the housing. The fixed frame is equipped with a first lead screw. The first lead screw is rotatably connected to the fixed frame. A first nut is sleeved on the first lead screw. A first pressing member is fixedly connected to the first nut. The housing has a first sliding groove. The first pressing member is slidably connected to the first sliding groove. When the first lead screw rotates, it can drive the first pressing member to move and contact the first pressure plate. When the first pressing member contacts the first pressure plate, it can squeeze the first pressure plate to bend it so that the first pressure plate contacts the first contact.

[0009] The fixed frame is equipped with a second lead screw, which is rotatably connected to the fixed frame. A second nut is fitted on the second lead screw, and a second pressing member is fixedly connected to the second nut. The housing is provided with a second sliding groove, and the second pressing member is slidably connected to the second sliding groove. When the second lead screw rotates, it can drive the second pressing member to move and contact the second pressure plate. When the second pressing member contacts the second pressure plate, it can squeeze the second pressure plate to bend it so that the second pressure plate contacts the second contact.

[0010] Furthermore, there are three first contacts, each corresponding to one of the three phase lines.

[0011] Furthermore, there are three first pressure plates, each corresponding to one of the three first contacts.

[0012] Furthermore, as the first pressing member moves, it passes through three first pressure plates in sequence, and the first pressing member can only contact one of the three first pressure plates at a time.

[0013] Furthermore, a first insulating sleeve is fitted onto the first pressure plate, and a first fixing groove is formed on the first insulating sleeve to accommodate the first pressing member. When the first pressing member presses the first pressure plate, the first pressing member is located in the first fixing groove. A second insulating sleeve is fitted onto the second pressure plate, and a second fixing groove is formed on the second insulating sleeve to accommodate the second pressing member. When the second pressing member presses the second pressure plate, the second pressing member is located in the second fixing groove.

[0014] Furthermore, both the first pressing element and the second pressing element are spherical.

[0015] Furthermore, both the first and second pressing components are made of insulating material.

[0016] Furthermore, the fixing plate, the first pressure plate, and the second pressure plate are all made of metal with good electrical conductivity.

[0017] Furthermore, support columns are provided at the bottom of both the first and second pressure plates. The support columns lift the first pressure plate to separate it from the first contact and lift the second pressure plate to separate it from the second contact.

[0018] This invention discloses an automatic phase-switching three-phase imbalance correction device. When the intelligent phase commutator malfunctions and cannot automatically switch phases, requiring manual switching, the first lead screw is remotely controlled to rotate, causing the first pressing member to move and press the first pressure plate, making the first pressure plate contact the first contact, thus connecting the phase wire to the live wire at the user end. The second lead screw rotates, causing the second pressing member to move and press the second pressure plate, making the second pressure plate contact the second contact, thus connecting the neutral wire to the neutral wire at the user end. This completes the circuit loop, enabling power supply. The operator then operates according to the instructions displayed on the intelligent main controller. The system analyzes the load conditions of the three phase lines to select one phase line and controls the first pressing element to press the corresponding first pressure plate, making the first pressure plate contact the corresponding first contact, thereby achieving remote load adjustment and three-phase balance adjustment. Compared with traditional technology, this technical solution can still switch different phase lines in the circuit by remotely controlling the rotation of the first and second lead screws even after the commutator fails. It eliminates the need for electricians to manually handle the faulty commutator, replacing the manual phase switching of the distribution transformer and improving the efficiency of three-phase load balance adjustment. Attached Figure Description

[0019] Figure 1 This is the front view of the present invention;

[0020] Figure 2 This is a right view of the present invention;

[0021] Figure 3 This is a top view of the present invention;

[0022] Figure 4 This is a schematic diagram of the system wiring for the three-phase load imbalance manual transfer switch of the present invention.

[0023] Reference numerals in the attached drawings: 1. Intelligent commutator; 2. First motor; 3. First contact; 4. Second contact; 5. Fixing plate; 6. First pressure plate; 7. Second pressure plate; 8. Fixing frame; 9. Housing; 10. First lead screw; 11. First nut; 12. First pressing element; 13. First slide groove; 14. Second lead screw; 15. Second nut; 16. Second pressing element; 17. Second slide groove; 18. Second motor; 19. First insulating sleeve; 20. First fixing groove; 21. Second fixing groove; 22. Second insulating sleeve; 23. Support column. Detailed Implementation

[0024] To make the technical means, technical features, inventive purpose and technical effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0025] Example 1:

[0026] like Figure 1 and Figure 2As shown, this embodiment provides an automatic phase-switching three-phase imbalance control device, including an intelligent main controller and an intelligent phase commutator 1 installed in a housing 9. The intelligent phase commutator 1 is equipped with a manual switching switch and has a first contact 3 and a second contact 4. The first contact 3 is connected to the phase line, and the second contact 4 is connected to the neutral line. If the neutral line is grounded, it can be the neutral line. The manual switching switch includes a fixing plate 5, a first pressure plate 6, and a second pressure plate 7. The fixing plate 5 is connected to the live wire at the user end. The first pressure plate 6 is located on one side of the first contact 3 and is screwed or welded to the fixing plate 5. The second pressure plate 7 is located on one side of the second contact 4 and is connected to the neutral line at the user end.

[0027] The housing 9 is screwed to a fixing frame 8, which is provided with a first lead screw 10. The first lead screw 10 is rotatably connected to the fixing frame 8 through a bearing. A first nut 11 is fitted on the first lead screw 10. The first pressing member 12 is screwed to the support plate 18. The housing 9 is provided with a first sliding groove 13. The first pressing member 12 is slidably connected to the first sliding groove 13. When the first lead screw 10 rotates, it can drive the first pressing member 12 to move and contact the first pressure plate 6. When the first pressing member 12 contacts the first pressure plate 6, it can squeeze the first pressure plate 6 to bend it so that the first pressure plate 6 contacts the first contact 3.

[0028] The fixed frame 8 is provided with a second lead screw 14, which is rotatably connected to the fixed frame 8 through a bearing. A second nut 15 is sleeved on the second lead screw 14, and a second pressing member 16 is fixedly connected to the second nut 15 by screws. The housing 9 is provided with a second sliding groove 17, and the second pressing member 16 is slidably connected to the second sliding groove 17. When the second lead screw 14 rotates, it can drive the second pressing member 16 to move and contact the second pressure plate 7. When the second pressing member 16 contacts the second pressure plate 7, it can squeeze the second pressure plate 7 to bend it so that the second pressure plate 7 contacts the second contact 4.

[0029] Preferably, two motors, namely a first motor 2 and a second motor 18, are fixedly installed on the housing 9 with screws. The first motor 2 is fixedly connected to the first lead screw 10 through a coupling or key, and the second motor 18 is fixedly connected to the second lead screw 14 through a coupling or key. The rotation of the first lead screw 10 and the second lead screw 14 is realized by driving the first motor 2 and the second motor 18. Since the connection between the motor and the lead screw is a very mature existing technology, those skilled in the art can install it themselves according to the actual situation, and it will not be described in detail here.

[0030] Preferably, there are three first contacts 3, and the three first contacts 3 correspond one-to-one with the three phase lines.

[0031] Preferably, there are three first pressure plates 6, and the three first pressure plates 6 correspond one-to-one with the three first contacts 3.

[0032] Preferably, when the first pressing member 12 moves, it passes through three first pressure plates 6 in sequence, and the first pressing member 12 can only contact one of the three first pressure plates 6 at the same time.

[0033] Preferably, a first insulating sleeve 19 is fitted onto the first pressure plate 6, and a first fixing groove 20 is formed on the first insulating sleeve 19 to accommodate the first pressing member 12. When the first pressing member 12 presses the first pressure plate 6, the first pressing member 12 is located in the first fixing groove 20. A second insulating sleeve 22 is fitted onto the second pressure plate 7, and a second fixing groove 21 is formed on the second insulating sleeve 22 to accommodate the second pressing member 16. When the second pressing member 16 presses the second pressure plate 7, the second pressing member 16 is located in the second fixing groove 21. Preferably, in order to reduce friction, both the first insulating sleeve 19 and the second insulating sleeve 22 adopt a rounded corner design, and the edges of the first fixing groove 20 and the second fixing groove 21 also adopt a chamfered design.

[0034] Preferably, both the first pressing member 12 and the second pressing member 16 are spherical.

[0035] Preferably, both the first pressing member 12 and the second pressing member 16 are made of insulating material.

[0036] Preferably, the fixing plate 5, the first pressure plate 6, and the second pressure plate 7 are all made of metal with good conductivity.

[0037] Preferred, such as Figure 2 and Figure 3 As described above, the bottom of the first pressure plate 6 and the bottom of the second pressure plate 7 are both provided with support columns 23. The support columns 23 lift the first pressure plate 6 to separate the first pressure plate 6 from the first contact 3 and lift the second pressure plate 7 to separate the second pressure plate 7 from the second contact 4. The support columns 23 are fixedly connected to the housing screws. When the first pressure plate 6 is not squeezed by the first pressing member 12, the bottom support column 23 can separate the first contact 3 from the first pressure plate 6. When the second pressure plate 7 is not squeezed by the second pressing member 16, the bottom support column 23 can separate the second contact 4 from the second pressure plate 7. When the first pressure plate 6 or the second pressure plate 7 is squeezed and deformed, the support column 23 will also be squeezed, deformed and contracted. The support column 23 can be a spring or an elastic material.

[0038] At work, such as Figure 1 and Figure 4 As shown, when the intelligent phase changer 1 malfunctions and cannot automatically switch phases, requiring manual switching, the intelligent main controller first adjusts the intelligent phase changer 1 to disconnect the three-phase power lines inside the intelligent phase changer 1 from the load at the user end, thus engaging the manual switching switch to connect the management line. First, the remote control motor drives the first lead screw 10 to rotate, which moves the first pressing member 12 and presses the first pressure plate 6, causing the first pressure plate 6 to contact the first contact 3, connecting the phase line to the live wire at the user end, i.e., corresponding to... Figure 4In user 1 and user 2, S2 is selectively connected to one of a1, b1, and c1, and S2 is selectively connected to one of a2, b2, and c2; the rotation of the second lead screw 14 causes the second pressing member 16 to move and press the second pressure plate 7, so that the second pressure plate 7 contacts the second contact 4, that is, corresponding to Figure 4 In User 1 and User 2, the connection between S1 and n1 and between S1 and n2 enables the neutral line to be connected to the neutral line at the user end. This allows the three-phase power lines to be reconnected to the user end load, thus enabling power supply. During operation, the operator selects one phase line based on the load of the three phase lines and controls the first pressing member 12 to press the corresponding first pressure plate 6, so that the first pressure plate 6 contacts the corresponding first contact 3, thereby achieving remote load adjustment and thus adjusting the three-phase balance. Even after the phase changer fails, this technical solution can still switch different phase lines in the circuit by remotely controlling the rotation of the first lead screw 10 and the second lead screw 14. Although it is a manual adjustment, it does not require the electrician to come to the faulty phase changer to handle it personally, saving time and replacing the electrician's manual phase change of the distribution transformer, thus improving the adjustment efficiency of the three-phase load balance.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the claims of this invention should fall within the technical scope of this invention.

Claims

1. A three-phase imbalance control device with automatic phase commutation, comprising an intelligent main controller and an intelligent phase commutator (1) installed in a housing (9), wherein the intelligent phase commutator (1) is provided with a manual switching switch, characterized in that: The intelligent phase changer (1) is provided with a first contact (3) and a second contact (4). The first contact (3) is connected to the phase line, and the second contact (4) is connected to the neutral line. The manual switching switch includes a fixing plate (5), a first pressure plate (6), and a second pressure plate (7). The fixing plate (5) is connected to the live wire at the user end. The first pressure plate (6) is located on one side of the first contact (3) and is fixedly connected to the fixing plate (5). The second pressure plate (7) is located on one side of the second contact (4) and is connected to the neutral wire at the user end. A fixed frame (8) is fixedly connected inside the housing (9). The fixed frame (8) is provided with a first lead screw (10). The first lead screw (10) is rotatably connected to the fixed frame (8). A first nut (11) is sleeved on the first lead screw (10). A first pressing member (12) is fixedly connected to the first nut (11). A first sliding groove (13) is opened in the housing (9). The first pressing member (12) is slidably connected to the first sliding groove (13). When the first lead screw (10) rotates, it can drive the first pressing member (12) to move and contact the first pressure plate (6). When the first pressing member (12) contacts the first pressure plate (6), it can squeeze the first pressure plate (6) to bend so that the first pressure plate (6) contacts the first contact (3). The fixed frame (8) is provided with a second lead screw (14), which is rotatably connected to the fixed frame (8). A second nut (15) is sleeved on the second lead screw (14), and a second pressing member (16) is fixedly connected to the second nut (15). The housing (9) is provided with a second sliding groove (17), and the second pressing member (16) is slidably connected to the second sliding groove (17). When the second lead screw (14) rotates, it can drive the second pressing member (16) to move and contact the second pressure plate (7). When the second pressing member (16) contacts the second pressure plate (7), it can squeeze the second pressure plate (7) to bend so that the second pressure plate (7) contacts the second contact (4). When the intelligent phase changer (1) fails to automatically change phase and needs to be manually changed, the intelligent phase changer (1) is first adjusted by the intelligent main controller to disconnect the three-phase power line in the intelligent phase changer (1) from the load at the user end, so that the manual switching switch can be intervened to manage the connection of the line. First, the remote control motor drives the first lead screw (10) to rotate, which can move the first pressing part (12) and press the first pressure plate (6), so that the first pressure plate (6) contacts the first contact (3), and the phase line is connected to the live wire at the user end. The second lead screw (14) rotates to move the second pressing part (16) and press the second pressure plate (7), so that the second pressure plate (7) contacts the second contact (4), thereby realizing the closure of the circuit between the three-phase power line and the load at the user end, and thus realizing the power supply.

2. The three-phase imbalance correction device with automatic phase commutation according to claim 1, characterized in that: There are three first contacts (3), and each of the three first contacts (3) corresponds to one of the three phase lines.

3. The three-phase imbalance control device with automatic phase commutation according to claim 2, characterized in that: There are three first pressure plates (6), and the three first pressure plates (6) correspond one-to-one with the three first contacts (3).

4. The three-phase imbalance correction device with automatic phase commutation according to claim 3, characterized in that: When the first pressing member (12) moves, it passes through the three first pressure plates (6) in sequence. The first pressing member (12) can only contact one of the three first pressure plates (6) at the same time.

5. The three-phase imbalance control device with automatic phase commutation according to claim 1, characterized in that: A first insulating sleeve (19) is fitted on the first pressure plate (6). A first fixing groove (20) is opened on the first insulating sleeve (19) to accommodate the first pressing member (12). When the first pressing member (12) presses the first pressure plate (6), the first pressing member (12) is located in the first fixing groove (20). A second insulating sleeve (22) is fitted on the second pressure plate (7). A second fixing groove (21) is opened on the second insulating sleeve (22) to accommodate the second pressing member (16). When the second pressing member (16) presses the second pressure plate (7), the second pressing member (16) is located in the second fixing groove (21).

6. The three-phase imbalance control device with automatic phase commutation according to claim 5, characterized in that: Both the first pressing element (12) and the second pressing element (16) are spherical.

7. The three-phase imbalance control device with automatic phase commutation according to claim 1, characterized in that: Both the first pressing element (12) and the second pressing element (16) are made of insulating material.

8. The three-phase imbalance control device with automatic phase commutation according to claim 7, characterized in that: The fixing plate (5), the first pressure plate (6), and the second pressure plate (7) are all made of metal with good conductivity.

9. The three-phase imbalance correction device with automatic phase commutation according to claim 7, characterized in that: The bottom of the first pressure plate (6) and the bottom of the second pressure plate (7) are both provided with support columns (23). The support columns (23) lift the first pressure plate (6) to separate the first pressure plate (6) from the first contact (3) and lift the second pressure plate (7) to separate the second pressure plate (7) from the second contact (4).

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