Large-scale high-voltage motor stator winding wire outlet device

Abstract

The utility model discloses a large-scale high-voltage motor stator winding wire outlet device, which relates to the technical field of high-voltage motors, and comprises a wire outlet mechanism, the wire outlet mechanism comprises a main wire outlet box and a neutral point wire outlet box, one side of each wire outlet box is provided with a motor stator installation support, and the other side of each wire outlet box is provided with a motor stator installation support. The wire outlet box is detachably connected with the corresponding motor stator mounting support and is provided with a compensation telescopic section, and a wire at one end of the motor stator mounting support passes through the telescopic section and is connected into the corresponding wire outlet box, so that an operator can conveniently carry out on-site mounting through an assembly mode; the expansion joint is helpful to make up for installation and butt joint errors of the main outlet box, the neutral point outlet box and the motor caused by installation errors of a motor support and actual size errors of a foundation pit, and the technical problem that in a special application scene with limited space, the difficulty of fixing and insulating a motor stator winding wire is increased due to a complex installation structure is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-voltage motors, in particular to a large-scale high-voltage motor stator winding lead-out device. Background Art

[0002] The large high-voltage motor stator winding lead-out device is a device that leads the motor stator winding wire out of the motor housing and connects it to an external power supply or other equipment. It usually consists of a lead-out box, insulating materials, lead connectors, grounding devices, etc. The lead-out box is the core part of the entire device. It is used to connect the motor stator winding wires and provide good insulation and fixation. The lead-out box usually has waterproof, dustproof, and corrosion-resistant properties to protect the motor stator winding from the influence of the external environment.

[0003] In the prior art, in the field of large-scale high-voltage motors, different use scenarios have different requirements for large-scale high-voltage motors, especially in special application scenarios such as pump stations, wind tunnels, and water tunnels. Pump stations, wind tunnels, water tunnels, and other scenarios usually have limited space, and conventional outlet boxes usually have complex structures, including multiple wiring points and connection components. In special application scenarios with limited space, it is often impossible to effectively layout and install such complex structures, which increases the difficulty of fixing and insulating the motor stator winding wires. Therefore, there is an urgent need for a large-scale high-voltage motor stator winding outlet device suitable for these special scenarios. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a large-scale high-voltage motor stator winding outlet device, which solves the problem that the complex installation structure increases the difficulty of fixing and insulating the motor stator winding wire in special application scenarios with limited space.

[0005] To achieve the above-mentioned purpose, according to an embodiment of the utility model, a large-scale high-voltage motor stator winding lead-out device is proposed, including a lead-out mechanism, wherein the lead-out mechanism includes a main lead-out box and a neutral point lead-out box, and a motor stator mounting support is arranged on one side of each of the lead-out boxes, and the lead-out box is detachably connected to the corresponding motor stator mounting support, and a compensating telescopic section is arranged, and a wire at one end of the motor stator mounting support passes through the telescopic section and is connected to the corresponding lead-out box.

[0006] Preferably, the main outlet box comprises a main outlet box main box body, a main outlet box door panel, a main outlet box expansion joint, and a split main outlet box transition pipe which are assembled in sequence, and one end of the main outlet box transition pipe is fixedly connected to a motor stator main outlet mounting bracket.

[0007] Preferably, a motor stator main outlet terminal is provided on the motor stator main outlet mounting support; a main outlet box copper busbar is provided inside the main box body of the main outlet box, one end of the main outlet box copper busbar is connected to the motor stator outlet terminal of the corresponding phase on the motor, and the other end of the main outlet box copper busbar is connected to the corresponding outlet terminal.

[0008] Preferably, a main outlet box current transformer and a coupling capacitor are also provided in the main outlet box.

[0009] Preferably, the coupling capacitors are respectively located on the top of the transition tube of the main outlet box and the main box of the main outlet box, and correspond to the phase numbers of the copper busbars of the main outlet box.

[0010] Preferably, a main outlet box top protective cover and a top protective cover door panel which are assembled with each other are provided at the top end of the main outlet box.

[0011] Preferably, the neutral point outlet box includes a neutral point outlet box main box body, a neutral point outlet box door panel, a neutral point outlet box expansion joint, and a split neutral point outlet box transition pipe which are assembled in sequence, and one end of the neutral point outlet box transition pipe is fixedly connected to the motor stator neutral point outlet mounting bracket.

[0012] Preferably, a neutral point outlet box copper busbar is arranged inside the neutral point outlet box main box, one end of the neutral point outlet box copper busbar is connected to the connector of the corresponding phase of the motor stator neutral point outlet mounting support, and the other end of the neutral point outlet box copper busbar is connected together.

[0013] Preferably, a neutral point current transformer is also installed inside the main box of the neutral point outlet box.

[0014] Preferably, the telescopic section is made of metal material.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The main terminal box and the neutral point terminal box are assembled through the main box body, door panel, expansion joint and transition pipe, and are fixed to the corresponding motor stator mounting support through the transition pipe. The transition pipe adopts a split design. When it is used in special application scenarios with limited space environment such as pump stations, wind tunnels and water tunnels, the assembled design is used with multiple mounting brackets inside to facilitate the connection of multiple wiring points and connecting components, which is helpful for on-site installation. The expansion joint helps to compensate for the installation error of the motor support and the actual size error of the foundation pit, which causes the installation docking error between the main terminal box and the neutral point terminal box and the motor, facilitates on-site installation, further facilitates the operator to make adjustments in scenarios with limited space, and reduces the difficulty of fixing and insulating the motor stator winding wires.

[0017] The motor stator winding lead-out device solves the problems of integrated installation design of lead-out boxes for current transformers and partial discharge coupling capacitors for large high-voltage motors, convenient motor winding insulation detection, ventilation and heat dissipation in special application scenarios of lead-out boxes, and installation and maintenance structure design. It provides a stator winding lead-out device with a compact structure and efficient use of space for large motors in special application scenarios such as pumping stations, wind tunnels, and water tunnels. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a circuit schematic diagram of a single Y-structure motor stator winding outlet device;

[0019] Figure 2 It is a structural diagram of the main outlet box and the neutral point outlet box;

[0020] Figure 3 This is the main outlet box assembly diagram;

[0021] Figure 4 This is the exploded view of the main outlet box structure;

[0022] Figure 5 This is a cross-sectional view of the main outlet box;

[0023] Figure 6 This is a schematic diagram of the neutral point outlet box structure;

[0024] Figure 7 This is the cross-sectional view of the neutral point outlet box;

[0025] Figure 8 This is a cross-sectional view of the neutral point outlet box.

[0026] The numbers in the figure represent:

[0027] 1. Main outlet box; 101. Main box of main outlet box; 102. Main outlet box door panel; 10201. Small door panel; 103. Main outlet box expansion joint; 104. Main outlet box transition pipe; 10401. Transition pipe upper piece; 10402. Transition pipe lower piece; 105. Main outlet box top protective cover; 10501. Top protective cover door panel; 106. Main outlet box opening side panel; 107. Main outlet box second Secondary junction box; 108, main outlet box mounting plate; 109, main outlet box current transformer; 110, coupling capacitor; 111, outlet terminal; 112, main outlet box copper busbar; 113, main outlet box copper braided wire; 114, main outlet box insulation support; 115, main outlet box installation bent plate; 116, bottom plate; 117, main outlet box current transformer installation bent plate; 118, main outlet box grounding copper busbar;

[0028] 2. Neutral point outlet box; 201. Neutral point outlet box main box; 20101. Lifting ring; 202. Neutral point outlet box door panel; 203. Neutral point outlet box expansion joint; 204. Neutral point outlet box transition tube; 205. Neutral point outlet box opening side panel; 206. Neutral point outlet box secondary junction box; 207. Neutral point outlet box mounting plate; 208. Neutral point outlet box copper braided wire; 209. Neutral point outlet box copper busbar; 210. Neutral point outlet box insulation support; 211. Neutral point outlet box insulator installation bent plate; 212. Neutral point outlet box grounding copper busbar; 213. Neutral point outlet box current transformer installation bent plate; 214. Shoulder pole copper busbar; 215. Top plate; 216. Neutral point current transformer;

[0029] 3. Motor stator main outgoing line mounting bracket; 301. Motor stator outgoing line terminal;

[0030] 4. Install the support for the neutral point lead of the motor stator. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figures 1 to 8 As shown, a large-scale high-voltage motor stator winding lead-out device comprises a lead-out mechanism, wherein the lead-out mechanism comprises a main lead-out box 1 and a neutral point lead-out box 2, a motor stator mounting support is arranged on one side of each of the lead-out boxes, the lead-out boxes are detachably connected to the corresponding motor stator mounting support, and a compensating telescopic section is arranged, and a wire at one end of the motor stator mounting support passes through the telescopic section and is connected to the lead-out box.

[0033] As an implementation method in this embodiment, Figure 1 , Figure 3-Figure 5As shown, the main outlet box 1 includes a main outlet box main box body 101, a main outlet box door panel 102, a main outlet box expansion joint 103, and a main outlet box transition pipe 104, which are assembled in sequence and are all fixed by bolts; the main outlet box main box body 101 is mounted on the pit wall by two main outlet box mounting plates 108 in a wall-mounted manner, and the main outlet box transition pipe 104 is bolted with a motor stator main outlet mounting support 3, and the motor stator main outlet mounting support 3 is also provided with a motor stator outlet terminal 301; a three-phase main outlet box copper busbar 112 is arranged inside the main outlet box main box body 101, and one end of the main outlet box copper busbar 112 is connected to the motor stator outlet terminal 301 of the corresponding phase on the motor through the main outlet box copper braided wire 113, and the main outlet box copper busbar The other end of 112 is connected to the corresponding outlet terminal 111 by bolts; the main outlet box 1 is also installed with a through-type main outlet box current transformer 109 and a coupling capacitor 110 of a partial discharge monitoring system; the main outlet box current transformer 109 is fixedly installed on the main box body 101 of the main outlet box through the main outlet box current transformer installation bent plate 117; the main outlet box opening side plate 106 is fixedly installed on one side of the main box body 101 of the main outlet box, and the main outlet box secondary terminal box 107 is also fixedly installed on one side of the main outlet box opening side plate 106. The primary side of the main outlet box current transformer 109 passes through the main outlet box copper busbar 112, and its secondary wiring enters the main outlet box secondary terminal box 107 from the wire hole on the main outlet box opening side plate 106;

[0034] As an implementation method in this embodiment, Figure 1 , Figure 4 and Figure 5 As shown, the partial discharge monitoring system is provided with a plurality of coupling capacitors 110, with several capacitors for each phase, preferably two capacitors for each phase: one capacitor for each phase is installed at the transition pipe 104 of the main outlet box, and the other capacitor is installed on the top of the main box body 101 of the main outlet box. The upper part of the coupling capacitor 110 is connected to the outlet terminal 111 and the motor stator outlet terminal 301 through a high-voltage cable, and the lower part of the coupling capacitor 110 is connected to the partial discharge monitor terminal box through a coaxial cable.

[0035] As an implementation method in this embodiment, Figure 4 and Figure 5 As shown, the three-phase main outlet box copper busbar 112 is installed on the main outlet box mounting bent plate 115 through the main outlet box insulating support 114, and a bottom plate 116 is fixedly installed at the bottom end of the main box body 101 of the main outlet box, and the main outlet box mounting bent plate 115 is installed on the bottom plate 116.

[0036] As an implementation method in this embodiment, Figure 4 and Figure 5As shown, a main outlet box grounding copper bar 118 is also installed on the main box body 101 of the main outlet box, which is used for grounding internal devices; an external grounding block is also provided on the main box body 101 of the main outlet box for grounding protection.

[0037] As an implementation method in this embodiment, Figure 3 and Figure 4 As shown, a main outlet box top protective cover 105 and a top protective cover door panel 10501 which are assembled with each other are provided at the top of the main outlet box 1 .

[0038] As an implementation method in this embodiment, Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, the neutral point outlet box 2 includes a neutral point outlet box main box 201, a neutral point outlet box door panel 202, a neutral point outlet box expansion joint 203, and a neutral point outlet box transition pipe 204, which are assembled in sequence and are all fixed by bolts; the neutral point outlet box main box 201 is mounted on the foundation pit wall by two neutral point outlet box mounting plates 207 in a wall-mounted manner; the neutral point outlet box transition pipe 204 is bolted with a motor stator neutral point outlet mounting support 4, and the motor stator neutral point outlet mounting support 4 is also provided with a motor stator outlet terminal 301; a three-phase neutral point outlet box copper busbar 209 is arranged inside the neutral point outlet box main box 201, and one end of the neutral point outlet box copper busbar 209 is connected to the corresponding phase of the motor The stator outlet terminal 301 is connected through the copper braided wire 208 of the neutral point outlet box, and the other end of the copper busbar 209 of the neutral point outlet box is connected together through the shoulder pole copper busbar 214 to form the neutral point N; a top plate 215 is installed on the top of the neutral point outlet box main box 201, and a cable outlet hole is opened on the top plate 215. For a motor system with a neutral point grounding protection device, a high-voltage cable can be drawn from the neutral point N and passed through the cable outlet hole on the top plate 215 to connect to the neutral point grounding protection device; for a motor system without a neutral point grounding protection device, the cable outlet hole on the top plate 215 can be blocked. The top of the neutral point outlet box main box 201 and the surroundings are welded with lifting rings 20101 for easy lifting;

[0039] As an implementation method in this embodiment, Figure 6-Figure 8As shown, a through-type neutral point current transformer 216 is also installed inside the neutral point outlet box main box 201; the neutral point current transformer 216 is fixed to the neutral point outlet box main box 201 through the neutral point outlet box current transformer mounting bent plate 213; a neutral point outlet box opening side panel 205 is fixedly installed on one side of the neutral point outlet box main box 201, and a neutral point outlet box secondary junction box 206 is fixedly installed on the neutral point outlet box opening side panel 205, and the primary side of the above-mentioned neutral point current transformer 216 passes through the neutral point outlet box copper busbar 209, and its secondary wiring enters the neutral point outlet box secondary junction box 206 from the wire hole on the neutral point outlet box opening side panel 205.

[0040] As an implementation method in this embodiment, Figure 7 and Figure 8 As shown, the three-phase neutral point outlet box copper busbar 209 is fixed on the neutral point outlet box insulator mounting bent plate 211 through the neutral point outlet box insulating support 210, and the neutral point outlet box insulator mounting bent plate 211 is installed at the bottom end of the neutral point outlet box main box 201.

[0041] Similar to the main outlet box 1, a neutral point outlet box grounding copper bar 212 is also installed on the neutral point outlet box main box 201 for grounding internal devices; an external grounding block is also provided on the neutral point outlet box main box 201 for grounding protection.

[0042] The main box body 101 of the main outlet box adopts a frame structure, and a removable cover is arranged around the outside of the frame for protection. A removable small door panel 10201 with shutters is also arranged on the front cover of the main box body 101 of the main outlet box. The purpose of the removability is to facilitate observation and maintenance. The function of the shutters is ventilation and heat dissipation. The main box body 201 of the neutral point outlet box is similar to the above design.

[0043] The bottom plate 116 is provided with ventilation and heat dissipation holes, and the bottom end of the neutral point outlet box 2 is also provided with ventilation and heat dissipation holes.

[0044] The expansion joint 103 of the main terminal box and the expansion joint 203 of the neutral point terminal box are both made of metal materials; they have two functions: one is to isolate the vibration of the motor and reduce the influence of the motor vibration on the components in the main terminal box 1 and the neutral point terminal box 2; the other is to help compensate for the installation error of the motor support and the actual size error of the foundation pit, which causes the installation and docking error between the main terminal box 1 and the neutral point terminal box 2 and the motor, and facilitates on-site installation.

[0045] The main outlet box transition tube 104 is divided into an upper transition tube piece 10401 and a lower transition tube piece 10402, with an upper and lower split structure to facilitate disassembly and maintenance. The neutral point outlet box transition tube 204 is the same as the main outlet box transition tube 104, and is also designed as an upper and lower split structure.

[0046] Breaks are set between the motor stator outlet terminal 301 and the main outlet box copper busbar 112 and the neutral point outlet box copper busbar 209, and the main outlet box copper braided wire 113 and the neutral point outlet box copper braided wire 208 are used respectively to achieve electrical connection; the purpose of designing the above structure is to facilitate the disconnection of the main outlet box copper braided wire 113 and the neutral point outlet box copper braided wire 208 here, and to perform insulation detection on the motor stator winding.

[0047] Figure 1 The schematic diagram shown is a schematic diagram of an embodiment of a single Y winding. For large high-voltage motors with multiple Y windings, the main outlet box 1 and the neutral point outlet box 2 shown in multiple sets of embodiments can also meet the outlet requirements.

[0048] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A large-scale high-voltage motor stator winding outlet device, characterized in that: include: A wire outlet mechanism, the wire outlet mechanism comprising a main wire outlet box (1) and a neutral point wire outlet box (2), a motor stator mounting support being arranged on one side of each of the wire outlet boxes, the wire outlet box being detachably connected to the corresponding motor stator mounting support and being provided with a compensating telescopic section, a wire at one end of the motor stator mounting support passing through the telescopic section and being connected to the corresponding wire outlet box.

2. The large-scale high-voltage motor stator winding outlet device according to claim 1 is characterized in that: The main outlet box (1) comprises a main outlet box main box body (101), a main outlet box door panel (102), a main outlet box expansion joint (103), and a split main outlet box transition pipe (104) which are assembled in sequence, and one end of the main outlet box transition pipe (104) is fixedly connected to a motor stator main outlet installation support (3).

3. The large-scale high-voltage motor stator winding outlet device according to claim 2 is characterized in that: The motor stator main outlet mounting support (3) is provided with a motor stator outlet terminal (301); the main outlet box main box body (101) is provided with a main outlet box copper busbar (112), one end of the main outlet box copper busbar (112) is connected to the motor stator outlet terminal (301) of the corresponding phase on the motor, and the other end of the main outlet box copper busbar (112) is connected to the corresponding outlet terminal (111).

4. The large-scale high-voltage motor stator winding outlet device according to claim 3 is characterized in that: A main outlet box current transformer (109) and a coupling capacitor (110) are also provided in the main outlet box (1).

5. The large-scale high-voltage motor stator winding outlet device according to claim 4 is characterized in that: The coupling capacitors (110) are respectively located on the top of the main outlet box transition tube (104) and the main box body (101) of the main outlet box, and correspond to the phase numbers of the main outlet box copper busbars (112).

6. The large-scale high-voltage motor stator winding outlet device according to claim 1, characterized in that: The top of the main outlet box (1) is provided with a main outlet box top protective cover (105) and a top protective cover door panel (10501) which are assembled with each other.

7. The large-scale high-voltage motor stator winding outlet device according to claim 1, characterized in that: The neutral point outlet box (2) comprises a neutral point outlet box main box (201), a neutral point outlet box door panel (202), a neutral point outlet box expansion joint (203), and a split neutral point outlet box transition pipe (204) which are assembled in sequence, and one end of the neutral point outlet box transition pipe (204) is fixedly connected to a motor stator neutral point outlet mounting support (4).

8. The large-scale high-voltage motor stator winding lead-out device according to claim 7, characterized in that: A neutral point outlet box copper busbar (209) is arranged inside the neutral point outlet box main box (201), one end of the neutral point outlet box copper busbar (209) is connected to a connector of a corresponding phase of the motor stator neutral point outlet mounting support (4), and the other end of the neutral point outlet box copper busbar (209) is connected together.

9. The large-scale high-voltage motor stator winding outlet device according to claim 7 or 8, characterized in that: A neutral point current transformer (216) is also installed inside the neutral point outlet box main box (201).

10. The large-scale high-voltage motor stator winding outlet device according to claim 1, characterized in that: The telescopic section is made of metal material.

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