Transformer protection neutral point equipment

Abstract

The utility model discloses a transformer protection neutral point device, which relates to the field of high-voltage transformer substations and comprises a bottom frame, a control cubicle is mounted on the right side of the upper end of the bottom frame, a support is arranged on the left side of the upper end of the bottom frame and connected with a lightning rod through an adjusting bolt, and a supporting frame is arranged between the control cubicle and the support and fixedly connected onto the bottom frame. The gap adjusting mechanism is arranged on the upper portion of the supporting frame, the sphere gap current transformer is installed on the upper portion of the gap adjusting mechanism, the three-position switch is fixedly connected to the upper portion of the sphere gap current transformer, and the operating mechanism is arranged on one side of the three-position switch, so that design optimization, transportation and installation and debugging reduction of transformer protection equipment are achieved. A three-position switch simplifies operation, and a ruler assists accurate adjustment. Epoxy structure connection is compact, and line unified management supports remote. Height adjustment and a corrugated pipe enhance stability, and a grounding system guarantees safety. And the safety and the convenience of the equipment are integrally improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high voltage substation field, it is a transformer protection neutral point equipment. BACKGROUND

[0002] The existing transformer neutral point overvoltage protection combined electric appliance often adopts open type air insulation technology, is easily influenced by external environment such as humidity, altitude etc., needs to keep safe distance according to the corresponding voltage grade regulation requirement when operating, occupies large space, is not conducive to the demand of intensive substation construction, the current transformer often adopts solid insulation medium and pours as a whole, cannot be integrated with the grounding disconnecting switch, and the installation space is difficult to compress.

[0003] At present, there is also a fully-enclosed transformer protection neutral point equipment, after the transformer neutral point is led out, the neutral point is electrically connected with discharge gap, ball gap current transformer, grounding switch, surge arrester, control cabinet and other equipment respectively, as the neutral point overvoltage comprehensive protection equipment of ungrounded transformer in effective grounding network.

[0004] The utility model discloses a transformer protection neutral point equipment to solve the problem in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A transformer protection neutral point equipment, including the bottom frame, the upper end right side of the bottom frame is installed with the control cabinet, the upper end left side of the bottom frame is provided with the support, the support is connected with the lightning rod through the adjusting bolt, the support frame is arranged between the control cabinet and the support, the support frame is fixedly connected on the bottom frame, the support frame upper portion is provided with the gap adjusting mechanism, the ball gap current transformer is installed on the gap adjusting mechanism upper portion, the ball gap current transformer upper portion is fixedly connected with three position switch, one side of the three position switch is provided with the operating mechanism, the other side of the three position switch is fixedly connected with the current transformer through the connector, the current transformer is connected with the bellows, the bellows is connected with the first insulating basin, the upper portion of the connector is fixedly connected with the test transition shell.

[0007] The preferred technical scheme, the gap adjusting mechanism includes the pull rod rotation and the shaft seal, the pull rod rotation and the shaft seal upper portion are fixedly connected with the mechanism box assembly, the mechanism box assembly is provided with the stroke guide rail assembly inside, the bottom of the pull rod rotation and the shaft seal is provided with the spring contact assembly, the inside of the spring contact assembly is provided with the shaft coupling, and the bottom of the shaft coupling is provided with the dynamic side discharge ball head.

[0008] Preferably, the three-position switch comprises a shell, a static contact assembly is arranged at the left side of the inside of the shell, a grounding static contact assembly is arranged at the right side of the inside of the shell, a moving contact assembly is arranged between the static contact assembly and the grounding static contact assembly, and a densimeter is arranged at the left side of the outside of the shell.

[0009] Preferably, the moving contact assembly comprises a moving contact seat, a moving contact is slidably arranged in the inside of the moving contact seat, a guide sleeve is arranged on the contact seat and slidably matched with the moving contact, a contact finger is arranged on the surface of the moving contact, a rack is fixedly arranged on the moving contact, and a gear is arranged and engaged with the rack.

[0010] Preferably, the connector comprises a welding shell, a conversion conductor is arranged at the center of the inside of the welding shell, a connecting conductor is connected to the left side of the conversion conductor, a shielding cover is arranged on the outside of the connecting conductor, a second insulating basin is connected to the connecting conductor, an over-conductor is connected to the upper part of the conversion conductor, a static contact seat is connected to the over-conductor, a spring contact finger is arranged on the static contact seat, a welding conductor is connected to the lower part of the conversion conductor, a static contact seat is arranged on the outside of the welding conductor, a spring contact finger is arranged in the inside of the static contact seat, and a shielding cover is arranged on the right side of the conversion conductor.

[0011] Compared with the prior art, the utility model has the advantages of:

[0012] 1. The height is reduced, the gravity center is lowered, disassembly and transportation are not needed, primary and secondary installation of the main structure is completed in the factory, and the on-site installation and debugging workload is reduced.

[0013] 2. The on-site and factory test forms are consistent, test tooling does not need to be replaced, after the test is completed in the factory, the SF6 gas with micro positive pressure is transported to the site, after the site is connected with the transformer, the SF6 gas is directly supplemented.

[0014] 3. The three-position isolation grounding switch is adopted, the connection with the lightning arrester does not need to be disassembled and disconnected during on-site test, only the three-position isolation grounding switch needs to be operated to be switched, the on-site debugging workload is reduced, the three-position operating mechanism can realize manual operation and electric operation, and the electric operation can realize on-site and remote operation.

[0015] 4. The scale with recording and display is adopted, the gap adjustment is more convenient during on-site test, and the gap value can be observed at any time.

[0016] 5. The epoxy pouring basin structure is adopted to be connected with the transformer, the structure is simple, and the layout is compact.

[0017] 6. The secondary line of the three-position operating mechanism, the secondary lead of the current transformer, the lead of the lightning arrester, the density meter and the sensor lead of each gas chamber are connected to the control cabinet, and then connected to the main control room of the power station from the control cabinet, so as to realize local and remote control.

[0018] 7. The height is adjusted by bolts, and the horizontal bellows can offset the influence of manufacturing errors, foundation construction errors, foundation settlement, thermal expansion and cold contraction, facilitate the butt joint of the on-site neutral point equipment and the transformer, eliminate the stress of the hard connection of the shell and the hard connection of the conductor caused by deformation, and protect the safe operation of the equipment.

[0019] 8. The grounding of the grounding switch is connected with the shell, the shell is connected with the chassis, and the chassis is connected with the foundation embedded part and the power station ground net, so that the grounding switch is connected with the power station ground net; the discharge current of the ball gap is also flowed into the power station ground net through the method.

[0020] In summary, the design of the transformer protection neutral point equipment has many significant features and advantages. By lowering the height and the center of gravity, the integrated transportation and installation of the equipment is realized, and the on-site debugging workload is reduced. The factory test and the on-site test are consistent in form, no tooling needs to be replaced, and the work efficiency is improved. The three-position isolation grounding switch simplifies the on-site operation process and reduces the debugging workload. The scale with recording display makes the gap adjustment more convenient and accurate. The epoxy pouring basin structure is simple and compact in connection with the transformer. All the secondary lines and lead lines are connected to the control cabinet, and then connected to the main control room of the power station, so as to realize local and remote control. The application of bolt height adjustment and horizontal bellows effectively offsets various errors and deformation influences, and protects the safe operation of the equipment. Finally, the reliable connection of the grounding switch and the power station ground net ensures the safe flow of the ball gap discharge current into the ground net. These design features improve the safety, reliability and operation convenience of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure schematic view of the utility model;

[0022] Figure 2 It is a structure schematic view of the utility model;

[0023] Figure 3 It is a structure schematic view of the gap adjusting mechanism of the utility model;

[0024] Figure 4 It is a structure schematic view of the three-position switch of the utility model;

[0025] Figure 5 It is a structure schematic view of the moving contact of the utility model;

[0026] Figure 6 It is a structure schematic view of the connector of the utility model;

[0027] In the figure: 1 base frame, 2 control cabinet, 3 support, 4 adjusting bolt, 5 lightning rod, 6 support frame, 7 gap adjusting mechanism, 71 rod rotation and shaft seal, 72 mechanism box assembly, 73 stroke guide rail assembly, 74 spring contact assembly, 75 coupling, 76 dynamic side discharge ball head, 8 ball gap current transformer, 9 three-position switch, 91 housing, 92 static contact assembly, 93 ground static contact assembly, 94 moving contact assembly, 941 moving contact seat, 942 moving contact, 943 guide sleeve, 944 contact finger, 945 rack, 946 gear, 95 densitometer, 10 operating mechanism, 11 connector, 111 welded housing, 112 conversion conductor, 113 connecting conductor, 114 shielding cover, 115 second insulating basin, 116 excess conductor, 117 static contact seat, 118 spring contact finger, 119 welded conductor, 12 measurement current transformer, 13 bellows, 14 first insulating basin, 15 experimental transition housing. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] Please refer to Figures 1 to 6 A transformer protection neutral point device, including base frame 1, the upper end right side of base frame 1 is equipped with control cabinet 2, the upper end left side of base frame 1 is provided with support 3, support 3 is connected with lightning rod 5 by adjusting bolt 4, support frame 6 is arranged between control cabinet 2 and support 3, support frame 6 is fixedly connected on base frame 1, gap adjusting mechanism 7 is arranged on the upper portion of support frame 6, ball gap current transformer 8 is installed on the upper portion of gap adjusting mechanism 7, three-position switch 9 is fixedly connected on the upper portion of ball gap current transformer 8, operating mechanism 10 is arranged on the side of three-position switch 9, measurement current transformer 12 is fixedly connected on the other side of three-position switch 9 by connector 11, bellows 13 is connected on measurement current transformer 12, first insulating basin 14 is connected on bellows 13, experimental transition housing 15 is fixedly connected on the upper portion of connector 11.

[0030] Gap adjusting mechanism 7 includes rod rotation and shaft seal 71, mechanism box assembly 72 is fixedly connected on the upper portion of rod rotation and shaft seal 71, stroke guide rail assembly 73 is arranged in mechanism box assembly 72, spring contact assembly 74 is arranged on the bottom of rod rotation and shaft seal 71, coupling 75 is arranged on the inside of spring contact assembly 74, dynamic side discharge ball head 76 is arranged on the bottom of coupling 75.

[0031] The three-position switch 9 comprises a shell 91, a static contact assembly 92 is arranged at the left inside of the shell 91, a grounding static contact assembly 93 is arranged at the right inside of the shell 91, a dynamic contact assembly 94 is arranged between the static contact assembly 92 and the grounding static contact assembly 93, and a densimeter 95 is arranged at the left outside of the shell 91.

[0032] The dynamic contact assembly 94 comprises a dynamic contact seat 941, a dynamic contact 942 is slidably arranged in the dynamic contact seat 941, a guide sleeve 943 is arranged on the contact seat and slidably matched with the dynamic contact 942, a contact finger 944 is arranged on the surface of the dynamic contact 942, a rack 945 is fixedly arranged on the dynamic contact 942, and a gear 946 is arranged in meshing with the rack 945.

[0033] The connector 11 comprises a welding shell 111, a conversion conductor 112 is arranged at the center inside of the welding shell 111, a connecting conductor 113 is connected to the left of the conversion conductor 112, a shielding cover 114 is arranged outside the connecting conductor 113, a second insulating basin 115 is connected to the connecting conductor 113, an over-conduction conductor 116 is connected to the upper part of the conversion conductor 112, a static contact seat 117 is connected to the over-conduction conductor 116, spring contact fingers 118 are arranged on the static contact seat 117, a welding conductor 119 is connected to the lower part of the conversion conductor 112, the static contact seat 117 is arranged outside the welding conductor 119, the spring contact fingers 118 are arranged inside the static contact seat 117, and the shielding cover 114 is arranged at the right of the conversion conductor 112.

[0034] In the embodiment, the transformer protection neutral point device realizes high integration, simple operation and safety improvement. In the specific embodiment, the device comprises a base frame 1, a control and monitoring cabinet 2 is mounted on the right upper end of the base frame 1 and used for centrally controlling and monitoring electrical parameters of the device, a support 3 is arranged on the left of the base frame 1, the support 3 is connected with a lightning rod 5 through an adjusting bolt 4, and the position of the lightning rod 5 is adjusted flexibly. A support frame 6 is arranged between the control and monitoring cabinet 2 and the support 3, a gap adjusting mechanism 6 is arranged on the upper part of the support frame 6, a ball gap current transformer 8 is mounted on the upper part of the mechanism, and the current is switched and isolated through a three-position switch 9, wherein the three-position switch 9 is provided with an operating mechanism 10 and supports manual or electric operating mode, so that the on-site personnel can remotely or locally control. The measurement current transformer 12, the corrugated pipe 13, the first insulating basin 14 and the experimental transition shell 15 are carefully designed, which not only ensures the electrical performance but also simplifies the installation process. In particular, the scale with recording and display is adopted, so that the gap adjustment is more intuitive and accurate, and the application of the epoxy pouring basin structure simplifies the connection process with the transformer and enhances the structural stability. Finally, all secondary wires and lead wires are uniformly collected to the control and monitoring cabinet, and then connected to the main control room of the power station, so that comprehensive local and remote monitoring and management are realized. The transportation and installation efficiency is improved, and the reliability, safety and ease of use of the device are improved through a plurality of innovative measures.

[0035] As Figure 3 shown, gap adjusting mechanism 7 is designed with exquisite, through the pull rod rotation and shaft seal 71 to achieve precise adjustment. Upper fixed connection mechanism box assembly 72 inside the set has a stroke guide rail assembly 73, to ensure smooth movement. The bottom is equipped with spring contact assembly 74, which is internally provided with a coupling 75 at the upper end, and a dynamic side discharge ball head 76 at the bottom. The overall structure not only ensures the flexibility of operation, but also ensures the stability of electrical connection.

[0036] As Figure 4 and Figure 5 shown, three-position switch 9, the left side of the housing 91 is a static contact assembly 92, and the right side is a ground static contact assembly 93. The two are cleverly arranged with a dynamic contact assembly 94. The left side of the outside is also provided with a density meter 95 for convenient monitoring. Inside the dynamic contact assembly 94, the dynamic contact seat 941 is embedded with a dynamic contact 942. The design of the guide sleeve 943 on the dynamic contact 942 and the contact finger 944, as well as the internal rack 945 rotationally connected with the gear 946, together ensure the efficiency and stability of current conduction.

[0037] As Figure 6 shown, the connector 11 adopts a welded housing 111 as the main body, and a conversion conductor 112 is arranged at the center of the inside. The left side is connected with a connection conductor 113 wrapped by a shield cover 114, which is further connected with a second insulating basin 115. The upper part of the conversion conductor 112 is connected with a static contact seat 117 through an over-conductor 116, and the static contact seat 117 is provided with a spring contact finger 118 to ensure good contact. The lower part is connected with a welded conductor 119 which is also provided with a static contact seat 117 and a spring contact finger 118 outside. The right side is also provided with a shield cover 114, which covers the conversion conductor 112 and its surrounding area, providing stable and reliable electrical connection, effectively suppressing electromagnetic interference, and ensuring high quality of signal transmission.

[0038] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A transformer protection neutral point device comprising a base frame (1), characterized in that: The upper end right side of the chassis (1) is provided with a control cabinet (2), the upper end left side of the chassis (1) is provided with a support (3), the support (3) is connected with a lightning rod (5) through an adjusting bolt (4), a supporting frame (6) is arranged between the control cabinet (2) and the support (3), the supporting frame (6) is fixedly connected on the chassis (1), a gap adjusting mechanism (7) is arranged on the upper portion of the supporting frame (6), a ball gap current transformer (8) is arranged on the upper portion of the gap adjusting mechanism (7), a three-position switch (9) is fixedly connected on the upper portion of the ball gap current transformer (8), an operating mechanism (10) is arranged on one side of the three-position switch (9), a measuring current transformer (12) is fixedly connected on the other side of the three-position switch (9) through a connector (11), a corrugated pipe (13) is connected on the measuring current transformer (12), a first insulating basin (14) is connected on the corrugated pipe (13), and a test transition shell (15) is fixedly connected on the upper portion of the connector (11).

2. A transformer protection neutral device according to claim 1, characterized in that: The gap adjusting mechanism (7) comprises a pull rod rotation and shaft seal (71), the pull rod rotation and shaft seal (71) is fixedly connected with a mechanism box assembly (72) on the upper portion, a stroke guide rail assembly (73) is arranged in the mechanism box assembly (72), a spring contact assembly (74) is arranged on the bottom of the pull rod rotation and shaft seal (71), a shaft coupling (75) is arranged on the inside of the spring contact assembly (74), and a dynamic side discharge ball head (76) is arranged on the bottom of the shaft coupling (75).

3. A transformer protection neutral device according to claim 1, characterized in that: The three-position switch (9) comprises a shell (91), a static contact assembly (92) is arranged on the inside left side of the shell (91), a grounding static contact assembly (93) is arranged on the inside right side of the shell (91), a moving contact assembly (94) is arranged between the static contact assembly (92) and the grounding static contact assembly (93), and a densimeter (95) is arranged on the outside left side of the shell (91).

4. A transformer protection neutral device according to claim 3, characterized in that: The moving contact assembly (94) comprises a moving contact seat (941), a moving contact (942) is slidably arranged in the moving contact seat (941), a guide sleeve (943) is arranged on the contact seat and slidably matched with the moving contact (942), a contact finger (944) is arranged on the surface of the moving contact (942), a rack (945) is fixedly arranged on the moving contact (942), and the rack (945) is meshed with a gear (946).

5. The transformer protection neutral device of claim 1, wherein: The connector (11) comprises a welding shell (111), a conversion conductor (112) is arranged at the inside center of the welding shell (111), a connecting conductor (113) is connected to the left side of the conversion conductor (112), a shielding cover (114) is arranged outside the connecting conductor (113), a second insulating basin (115) is connected to the connecting conductor (113), an over-conductor (116) is connected to the upper part of the conversion conductor (112), a static contact seat (117) is connected to the over-conductor (116), spring contact fingers (118) are arranged on the static contact seat (117), a welding conductor (119) is connected to the lower part of the conversion conductor (112), a static contact seat (117) is arranged outside the welding conductor (119), spring contact fingers (118) are arranged inside the static contact seat (117), and a shielding cover (114) is arranged on the right side of the conversion conductor (112).

Images