Automatic commutation three-phase imbalance treatment device

Abstract

The invention relates to the technical field of three-phase imbalance treatment devices, and particularly discloses an automatic commutation three-phase imbalance treatment device which comprises an intelligent master controller and an intelligent phase converter installed in a shell, a manual change-over switch is arranged on the intelligent phase converter, and a first contact and a second contact are arranged on the intelligent phase converter. The first contact is connected with a phase line, the second contact is connected with a neutral line, the manual change-over switch comprises a fixing piece, a first pressing plate and a second pressing plate, and the fixing piece is connected with a live line of a user side. Therefore, switching of different phase lines in a loop is completed, an electrician does not need to go to a faulty phase converter for manual processing, manual phase commutation of the electrician on the distribution transformer is replaced, and the adjustment efficiency of three-phase load balance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of three-phase unbalance treatment devices, and in particular to a three-phase unbalance treatment device with automatic phase switching. Background Art

[0002] When the low-voltage power grid is powered by a three-phase four-wire system, the existence of single-phase loads in the low-voltage area will inevitably cause unbalanced three-phase loads. The traditional method is for electricians to manually change phases at the phase changer and manually adjust the three-phase loads to rebalance the three-phase loads. However, this adjustment method is time-consuming, labor-intensive and inefficient.

[0003] In order to improve the regulation efficiency of three-phase load balancing, people have designed a three-phase load automatic regulation device. This device mainly includes an intelligent main controller and an intelligent phase changer. The main controller is installed on the outgoing line side of the low-voltage distribution transformer in the substation, and the intelligent phase changer is installed at the front end of the incoming line at the user end. The main controller detects whether the three phases are balanced and controls the automatic phase change of the intelligent phase changer at the user end according to the load conditions of the three phases, thereby balancing the load of the three phases. This three-phase load automatic regulation device can replace the electrician's manual phase change of the phase changer when working normally, which improves the regulation efficiency of the three-phase load balancing to a certain extent. However, this automatic regulation device may also fail. After the failure, the electrician still needs to reach the faulty equipment to perform manual phase change, so the regulation efficiency of the three-phase load balancing is still low in the event of a failure.

[0004] Therefore, it is necessary to propose a three-phase unbalance management device with automatic phase change to improve the regulation efficiency of three-phase load balance during manual phase change. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing three-phase load automatic adjustment device still needs manual adjustment during manual phase change, resulting in low adjustment efficiency of three-phase load balance. A three-phase imbalance control device with automatic phase change is now provided.

[0006] The technical solution of the present invention is: An automatic phase-changing three-phase unbalance management device comprises an intelligent main controller and an intelligent phase converter installed in a shell, the intelligent phase converter is provided with a manual switching switch, the intelligent phase converter is provided with a first contact and a second contact, the first contact is connected to the phase line, the second contact is connected to the neutral line, the manual switching switch comprises a fixing plate, a first pressure plate and a second pressure plate, the fixing plate is connected to the live line of the user end, the first pressure plate is located at one side of the first contact and is fixedly connected to the fixing plate, and the second pressure plate is located at one side of the second contact and is connected to the neutral line of the user end; A fixing frame is fixedly connected in the shell, the fixing frame is provided with a first screw rod, the first screw rod is rotatably connected to the fixing frame, a first nut is sleeved on the first screw rod, a first pressing piece is fixedly connected to the first nut, a first sliding groove is provided in the shell, the first pressing piece is slidably connected to the first sliding groove, when the first screw rod rotates, the first pressing piece can be driven to move and contact the first pressing plate, when the first pressing piece contacts the first pressing plate, the first pressing plate can be squeezed to bend so that the first pressing plate contacts the first contact; The fixing frame is provided with a second screw rod, the second screw rod is rotatably connected to the fixing frame, a second nut is sleeved on the second screw rod, the second nut is fixedly connected with a second pressing piece, a second sliding groove is provided in the shell body, the second pressing piece is slidably connected to the second sliding groove, when the second screw rod rotates, it can drive the second pressing piece to move and contact with the second pressure plate, and when the second pressing piece contacts with the second pressure plate, it can squeeze the second pressure plate to bend so that the second pressure plate contacts with the second contact.

[0007] Furthermore, three first contacts are provided, and the three first contacts correspond one-to-one to the three-phase lines.

[0008] Furthermore, three first pressing plates are provided, and the three first pressing plates correspond one-to-one to the three first contacts.

[0009] Furthermore, when the first pressing member moves, it passes through the three first pressing plates in sequence, and the first pressing member can only contact one of the three first pressing plates at the same time.

[0010] Furthermore, a first insulating sleeve is sleeved on the first pressing plate, and a first fixing groove for accommodating a first pressing piece is opened on the first insulating sleeve. When the first pressing piece squeezes the first pressing plate, the first pressing piece is located in the first fixing groove. A second insulating sleeve is sleeved on the second pressing plate, and a second fixing groove for accommodating a second pressing piece is opened on the second insulating sleeve. When the second pressing piece squeezes the second pressing plate, the second pressing piece is located in the second fixing groove.

[0011] Furthermore, the first pressing member and the second pressing member are both spherical.

[0012] Furthermore, the first pressing member and the second pressing member are both made of insulating material.

[0013] Furthermore, the fixing plate, the first pressing plate and the second pressing plate are all made of metal material with good electrical conductivity.

[0014] Furthermore, support columns are provided at the bottom of the first pressing plate and the bottom of the second pressing plate, and the support columns lift the first pressing plate to separate the first pressing plate from the first contact and lift the second pressing plate to separate the second pressing plate from the second contact.

[0015] The present invention provides an automatic phase-changing three-phase imbalance control device. When the intelligent phase changer fails and cannot automatically change phases, manual phase change is required. By remotely controlling the rotation of the first screw rod, the first pressing member can be moved and pressed on the first pressing plate, so that the first pressing plate contacts the first contact, so that the phase line is connected to the live line of the user end. The second screw rod is rotated to move the second pressing member and press the second pressing plate, so that the second pressing plate contacts the second contact, so that the neutral line is connected to the zero line of the user end. Thus, a closed circuit of the circuit can be realized, thereby realizing power-on. The operator can control the phase line according to the display on the intelligent main controller. The load conditions of the three phase lines are determined, so as to select a phase line and control the first pressing member to press the corresponding first pressure plate, so that the first pressure plate contacts the corresponding first contact, thereby realizing remote load adjustment and thus realizing three-phase balance adjustment. Compared with the traditional technology, even after a phase converter failure, the present technical solution can still complete the switching of different phase lines in the loop by remotely controlling the rotation of the first screw rod and the second screw rod, without the need for electricians to come to the faulty phase converter for manual processing, replacing the electrician's manual phase switching of the distribution transformer, thereby improving the adjustment efficiency of the three-phase load balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the present invention; Figure 2 It is a right side view of the present invention; Figure 3 A top view of the present invention; Figure 4 The diagram is a system wiring diagram of a three-phase load unbalanced manual switch according to the present invention.

[0017] Figure numerals: 1. intelligent inverter; 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 screw rod; 11. first nut; 12. first pressing piece; 13. first slide groove; 14. second screw rod; 15. second nut; 16. second pressing piece; 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 DESCRIPTION

[0018] In order to make the technical means, technical features, invention objectives and technical effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific illustrations.

[0019] Embodiment 1: like Figure 1 and Figure 2As shown, this embodiment provides a three-phase unbalance control device with automatic phase switching, including an intelligent main controller and an intelligent phase converter 1 installed in a shell 9, the intelligent phase converter 1 is provided with a manual switching switch, the intelligent phase converter 1 is provided with a first contact 3 and a second contact 4, the first contact 3 is connected to the phase line, the second contact 4 is connected to the neutral line, wherein the neutral line can be a zero line if it is grounded, 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 line of 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, and the second pressure plate 7 is located on one side of the second contact 4 and is connected to the zero line of the user end.

[0020] A fixing frame 8 is screwed connected to the shell 9, and the fixing frame 8 is provided with a first screw rod 10. The first screw rod 10 is rotatably connected to the fixing frame 8 through a bearing. A first nut 11 is sleeved on the first screw rod 10. The first pressing piece 12 is screwed to the support plate 18. The shell 9 is provided with a first slide groove 13. The first pressing piece 12 is slidably connected to the first slide groove 13. When the first screw rod 10 rotates, it can drive the first pressing piece 12 to move and contact with the first pressure plate 6. When the first pressing piece 12 contacts with the first pressure plate 6, it can squeeze the first pressure plate 6 to bend so that the first pressure plate 6 contacts with the first contact 3.

[0021] The fixing frame 8 is provided with a second screw rod 14, and the second screw rod 14 is rotatably connected to the fixing frame 8 through a bearing. A second nut 15 is sleeved on the second screw rod 14, and the second nut 15 is screw-fixedly connected with a second pressing piece 16. The housing 9 is provided with a second slide groove 17, and the second pressing piece 16 is slidably connected to the second slide groove 17. When the second screw rod 14 rotates, it can drive the second pressing piece 16 to move and contact the second pressure plate 7. When the second pressing piece 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.

[0022] Preferably, two motors are fixedly installed on the housing 9 by screws, namely the first motor 2 and the second motor 18. The first motor 2 is fixedly connected to the first screw rod 10 by a coupling or a key, and the second motor 18 is fixedly connected to the second screw rod 14 by a coupling or a key. The first motor 2 and the second motor 18 are driven to realize the rotation of the first screw rod 10 and the second screw rod 14. Since the connection between the motor and the screw rod is a very mature existing technology, technicians in this field can install it by themselves according to actual conditions, which will not be repeated here.

[0023] Preferably, three first contacts 3 are provided, and the three first contacts 3 correspond one-to-one to the three-phase lines.

[0024] Preferably, three first pressing plates 6 are provided, and the three first pressing plates 6 correspond one-to-one to the three first contacts 3 .

[0025] Preferably, the first pressing member 12 passes through the three first pressing plates 6 in sequence when moving, and the first pressing member 12 can only contact one of the three first pressing plates 6 at the same time.

[0026] Preferably, a first insulating sleeve 19 is sleeved on the first pressure plate 6, and a first fixing groove 20 for accommodating the first pressing piece 12 is opened on the first insulating sleeve 19. When the first pressing piece 12 squeezes the first pressure plate 6, the first pressing piece 12 is located in the first fixing groove 20. A second insulating sleeve 22 is sleeved on the second pressure plate 7, and a second fixing groove 21 for accommodating the second pressing piece 16 is opened on the second insulating sleeve 22. When the second pressing piece 16 squeezes the second pressure plate 7, the second pressing piece 16 is located in the second fixing groove 21. Preferably, in order to reduce friction, the first insulating sleeve 19 and the second insulating sleeve 22 both adopt a chamfered design, and the edges of the first fixing groove 20 and the second fixing groove 21 also adopt a chamfered design.

[0027] Preferably, the first pressing member 12 and the second pressing member 16 are both spherical.

[0028] Preferably, the first pressing member 12 and the second pressing member 16 are both made of insulating material.

[0029] Preferably, the fixing plate 5, the first pressing plate 6 and the second pressing plate 7 are all made of metal material with good electrical conductivity.

[0030] Preferably, Figure 2 and Figure 3 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 shell screws. When the first pressure plate 6 is not squeezed by the first pressing piece 12, the support columns 23 at the bottom 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 piece 16, the support columns 23 at the bottom 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 columns 23 will also be squeezed, deformed and contracted. The support columns 23 can be a spring or an elastic material with elasticity.

[0031] When working, Figure 1 and Figure 4 As shown, when the intelligent phase converter 1 fails and cannot automatically change phases, and manual phase change is required, the intelligent main controller is first used to adjust the intelligent phase converter 1, so that the three-phase power line in the intelligent phase converter 1 is disconnected from the load at the user end, and the manual switching switch is intervened to manage the line connection. First, the remote control motor drives the first screw rod 10 to rotate, so that the first pressing member 12 can move and press the first pressing plate 6, so that the first pressing plate 6 contacts the first contact 3, so that the phase line is connected to the live line at the user end, that is, the corresponding Figure 4In user 1 and user 2, S2 is connected to one of a1, b1, and c1, and S2 is connected to one of a2, b2, and c2; the second screw rod 14 rotates to move the second pressing member 16 and press the second pressing plate 7, so that the second pressing plate 7 contacts the second contact 4, that is, the corresponding Figure 4 In user 1 and user 2, S1 is connected with n1 and S1 is connected with n2, so that the neutral line is connected with the zero line at the user end. At this point, the loop between the three-phase power line and the user-end load can be closed again, thereby realizing power-on. During the operation, the operator specifically selects a phase line according to the load conditions of the three phase lines, and controls the first pressing member 12 to press the corresponding first pressing plate 6, so that the first pressing plate 6 contacts the corresponding first contact 3, thereby realizing remote load adjustment, thereby realizing three-phase balance adjustment. Even after the phase converter fails, the technical solution can still remotely control the rotation of the first screw rod 10 and the second screw rod 14 to complete the switching of different phase lines in the loop. Although it is a manual adjustment, it does not require the electrician to come to the faulty phase converter to handle it personally, which saves time, replaces the electrician's manual phase change of the distribution transformer, and improves the adjustment efficiency of the three-phase load balance.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent application scope of the present invention should belong to the technical scope of the present invention.

Claims

1. An automatic phase-changing three-phase unbalance control device, comprising an intelligent main controller and an intelligent phase converter (1) installed in a housing (9), wherein a manual switching switch is provided on the intelligent phase converter (1), characterized in that: The intelligent phase converter (1) is provided with a first contact (3) and a second contact (4), the first contact (3) is connected to the phase line, the second contact (4) is connected to the neutral line, the manual switching switch comprises a fixing plate (5), a first pressure plate (6) and a second pressure plate (7), the fixing plate (5) is connected to the live line of 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), and the second pressure plate (7) is located on one side of the second contact (4) and is connected to the neutral line of the user end; A fixing frame (8) is fixedly connected inside the housing (9), the fixing frame (8) is provided with a first screw rod (10), the first screw rod (10) is rotatably connected to the fixing frame (8), a first nut (11) is sleeved on the first screw rod (10), the first nut (11) is fixedly connected to a first pressing member (12), 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 screw rod (10) rotates, the first pressing member (12) can be driven to move and contact the first pressing plate (6), when the first pressing member (12) contacts the first pressing plate (6), the first pressing plate (6) can be pressed to bend so that the first pressing plate (6) contacts the first contact (3); The fixing frame (8) is provided with a second screw rod (14), the second screw rod (14) is rotatably connected to the fixing frame (8), a second nut (15) is sleeved on the second screw rod (14), the second nut (15) is fixedly connected to a second pressing member (16), the housing (9) is provided with a second slide groove (17), the second pressing member (16) is slidably connected to the second slide groove (17), when the second screw rod (14) rotates, the second pressing member (16) can be driven to move and contact the second pressing plate (7), when the second pressing member (16) contacts the second pressing plate (7), the second pressing plate (7) can be pressed to bend so that the second pressing plate (7) contacts the second contact (4).

2. The automatic phase-changing three-phase unbalance control device according to claim 1 is characterized in that: Three first contacts (3) are provided, and the three first contacts (3) correspond one to one to the three-phase lines.

3. The automatic phase-changing three-phase unbalance control device according to claim 2 is characterized in that: Three first pressing plates (6) are provided, and the three first pressing plates (6) correspond one-to-one to the three first contacts (3).

4. The automatic phase-changing three-phase unbalance control device according to claim 3 is characterized in that: The first pressing member (12) passes through the three first pressing plates (6) in sequence when moving, and the first pressing member (12) can only contact one of the three first pressing plates (6) at the same time.

5. The automatic phase-changing three-phase unbalance control device according to claim 1 is characterized in that: The first pressing plate (6) is sleeved with a first insulating sleeve (19), the first insulating sleeve (19) is provided with a first fixing groove (20) for accommodating the first pressing member (12), and when the first pressing member (12) presses the first pressing plate (6), the first pressing member (12) is located in the first fixing groove (20), the second pressing plate (7) is sleeved with a second insulating sleeve (22), the second insulating sleeve (22) is provided with a second fixing groove (21) for accommodating the second pressing member (16), and when the second pressing member (16) presses the second pressing plate (7), the second pressing member (16) is located in the second fixing groove (21).

6. The automatic phase-changing three-phase unbalance control device according to claim 5 is characterized in that: The first pressing piece (12) and the second pressing piece (16) are both spherical.

7. The automatic phase-changing three-phase unbalance control device according to claim 1 is characterized in that: The first pressing member (12) and the second pressing member (16) are both made of insulating material.

8. The automatic phase-changing three-phase unbalance control device according to claim 7 is characterized in that: The fixing plate (5), the first pressing plate (6) and the second pressing plate (7) are all made of a metal material with good electrical conductivity.

9. The automatic phase-changing three-phase unbalance control device according to claim 7 is characterized in that: The bottom of the first pressing plate (6) and the bottom of the second pressing plate (7) are both provided with a support column (23), and the support column (23) lifts up the first pressing plate (6) to separate the first pressing plate (6) from the first contact (3), and lifts up the second pressing plate (7) to separate the second pressing plate (7) from the second contact (4).

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