Sulfur hexafluoride insulation ring main unit with test head

Abstract

The invention relates to the technical field of switch devices, in particular to a sulfur hexafluoride insulating ring main unit with a test head, which comprises a connecting cabinet fixedly connected to a cabinet body, the connector A is fixedly connected in the connecting cabinet; the mounting plate is fixedly connected in the cabinet body; the connector B is fixedly connected to the cabinet body; the mounting frame is fixedly connected to the mounting plate; the contact A is fixedly connected to the mounting frame; the test cabinet is fixedly connected to the cabinet body; the testing head is fixedly connected to the mounting plate; the contact B is fixedly connected to the mounting frame; the transverse frame is fixedly connected to the mounting plate; the tool apron is fixedly connected to the transverse frame; and the isolation knife is rotationally connected to the knife holder. According to the invention, the test cabinet is arranged inside, and the isolation knife is rotated to realize rapid switch-on and switch-off switching, so that the conventional test of the cable can be carried out without dismounting the cable head, the cable head does not need to be frequently plugged, the loss of related parts is reduced, and the stability of the whole power system is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of switch devices, and particularly to a sulfur hexafluoride insulated ring main unit with a test head. Background Art

[0002] As an important power distribution equipment in the power system, the sulfur hexafluoride ring main unit plays a crucial role in the process of power transmission and distribution. Therefore, its regular detection and maintenance work is of great significance for ensuring the safety and stability of the power system.

[0003] When regularly overhauling the sulfur hexafluoride ring main unit, it is necessary to disassemble the cable head for testing. Over time, such frequent operations will cause the joints of the cable head to gradually loosen, resulting in high wear of the components at the joints of the sulfur hexafluoride ring main unit, posing a potential threat to the normal operation of the sulfur hexafluoride ring main unit, and further affecting the stability of the entire power system. Summary of the Invention

[0004] In view of the technical defects mentioned in the above background art, the present invention provides a sulfur hexafluoride insulated ring main unit with a test head that does not require a cable head for testing.

[0005] A sulfur hexafluoride insulated ring main unit with a test head, comprising: a cabinet body;

[0006] A connection cabinet fixedly connected to the cabinet body;

[0007] A connector A fixedly connected inside the connection cabinet;

[0008] A mounting plate fixedly connected inside the cabinet body, the mounting plate partitioning an independent space inside the cabinet body, and the space is filled with sulfur hexafluoride;

[0009] A connector B fixedly connected to the cabinet body;

[0010] A mounting rack fixedly connected to the mounting plate;

[0011] A contact A fixedly connected to the mounting rack, the contact A being electrically connected to the connector B; a test cabinet fixedly connected to the cabinet body;

[0012] A test head fixedly connected to the mounting plate, the test head being electrically connected to the test cabinet; a contact B fixedly connected to the mounting rack, the contact B being electrically connected to the test head;

[0013] A cross rack fixedly connected to the mounting plate;

[0014] A knife seat fixedly connected to the cross rack, the knife seat being electrically connected to the connector A; an isolating knife rotatably connected to the knife seat, and the isolating knife rotates to be electrically connected to the contact A / the contact B.

[0015] More preferably, it further includes: a control cabinet fixedly connected to the cabinet body;

[0016] An installer fixedly installed in the control cabinet;

[0017] A rotating shaft A rotatably connected between the installer and the mounting bracket;

[0018] A C-shaped rotating frame rotatably connected to the rotating shaft A, and the end of the C-shaped rotating frame is rotatably connected to the isolating knife.

[0019] More preferably, it further includes: a rotating handle rotatably connected to the installer, and there are two rotating handles; an eccentric plate A fixedly connected to the rotating handle;

[0020] A V-shaped rotating plate fixedly connected to the rotating shaft A;

[0021] Connecting arms respectively slidably and rotatably connected between each eccentric plate A and the V-shaped rotating plate;

[0022] Eccentric plates B respectively fixedly connected to the two rotating handles;

[0023] A connecting column rotatably connected between the eccentric parts of the two eccentric plates B;

[0024] A spring A fixedly connected between the two eccentric plates B.

[0025] More preferably, it further includes: a one-way operating handle.

[0026] More preferably, the one-way operating handle includes: a central shaft;

[0027] A rotating rod fixedly connected to the central shaft, and the rotating rod is perpendicular to the central shaft;

[0028] One-way bearings fixedly connected to the upper and lower ends of the central shaft;

[0029] An inner-angle rotating cylinder rotatably connected to the one-way bearing, and the inner-angle rotating cylinder cooperates with the rotating handle.

[0030] More preferably, it further includes: a circuit breaker cabinet fixedly connected to the cabinet body, and an installer is fixedly connected inside the circuit breaker cabinet;

[0031] A circuit breaker fixedly connected to the mounting plate, and the circuit breaker is electrically connected to the contact A;

[0032] A control end slidably connected to the circuit breaker;

[0033] A rotating shaft B rotatably connected to the installer;

[0034] An opening and breaking cam fixedly connected to the rotating shaft B, and the opening and breaking cam is connected to the control end.

[0035] More preferably, it further includes: a toothed shaft fixedly connected to the rotating shaft A;

[0036] The baffle A rotatably connected to the installer;

[0037] The toothed plate fixedly connected to the end of the baffle A, and the toothed plate meshes with the toothed shaft.

[0038] More preferably, it further includes: the top block fixedly connected to the rotating shaft B;

[0039] The moving plate slidably connected to the installer;

[0040] The baffle B fixedly connected to the moving plate;

[0041] The spring B fixedly connected between the installer and the moving plate.

[0042] The beneficial effects of the present invention:

[0043] When using the present invention, by internally arranging the test cabinet and realizing quick opening and closing switching by rotating the isolating knife, it is possible to perform routine tests on the cable without disassembling the cable head, so that it is not necessary to frequently plug and unplug the cable head, reducing the loss of related components of the present invention, and further ensuring the stability of the entire power system.

[0044] When using the present invention, by arranging two turning handles to respectively control the opening and closing of the isolating knife, it is possible to prevent repeated misoperations of the isolating knife and improve the use safety of the switch cabinet.

[0045] When using the present invention, in cooperation with the one-way operation handle, it is possible to directly avoid repeated misoperations during the operation of the turning handle, and further improve the reliability of the turning handle for controlling the rotation of the isolating knife.

[0046] When using the present invention, by arranging the baffle A and the baffle B, when using a certain mechanism / component of the present invention, it is possible to limit another mechanism / component to prevent the misuse of other mechanisms / components and improve the use safety of the present invention. Description of the Drawings

[0047] Figure 1 It is a schematic external view of the present invention.

[0048] Figure 2 It is a schematic internal structure view of the present invention.

[0049] Figure 3 It is a schematic internal structure view of the present invention from the rear view angle.

[0050] Figure 4 It is a schematic connection structure view of the conductive connection plate A, the connector B, the contact A and the sub-end A of the present invention.

[0051] Figure 5 It is a schematic connection structure view of the test cabinet, the test head, the contact B and the sub-end B of the present invention.

[0052] Figure 6 This is a schematic diagram of the connection structure of connector A, knife base, sub-terminal C and isolation knife of the present invention.

[0053] Figure 7 This is a schematic diagram of the positional structure of contact A, contact B, knife base and isolation knife of the present invention.

[0054] Figure 8 This is a schematic diagram of the positional structure when the isolation knife of the present invention is adjusted to contact contact A.

[0055] Figure 9 This is a schematic diagram of the positional structure when the isolation knife of the present invention is adjusted to contact contact B.

[0056] Figure 10 This is a schematic diagram of the connection structure of two rotating handles and rotating shaft A of the present invention.

[0057] Figure 11 This is a schematic diagram of the connection structure of the one-way handle in the present invention.

[0058] Figure 12 This is a schematic diagram of the positional structure of the circuit breaker of the present invention.

[0059] Figure 13 This is a schematic diagram of the connection structure of the control end, rotating shaft B and opening and closing cam of the present invention.

[0060] Figure 14 This is a schematic diagram of the connection structure of baffle A of the present invention.

[0061] Figure 15 This is a schematic diagram of the connection structure of baffle B of the present invention.

[0062] The reference signs in the drawings are: 1, cabinet body; 2, control cabinet; 3, connection cabinet; 4, connector A; 5, cable head; 6, test cabinet; 7, circuit breaker cabinet; 8, mounting plate; 9, conductive connection plate A; 10, connector B; 11, mounting bracket; 12, contact A; 13, sub-terminal A; 14, conductive connection plate B; 15, test head; 16, conductive connection plate C; 17, contact B; 18, sub-terminal B; 19, conductive connection plate D; 20, cross frame; 21, knife base; 22, sub-terminal C; 23, isolation knife; 24, conductive connection wire; 25, installer; 26, rotating shaft A; 27, C-shaped rotating frame; 28, rotating handle; 29, eccentric plate A; 30, V-shaped rotating plate; 31, connecting arm; 32, eccentric plate B; 33, connecting column; 34, spring A; 35, central axis; 36, rotating rod; 37, one-way bearing; 38, inner corner rotating cylinder; 39, circuit breaker; 40, control end; 41, rotating shaft B; 42, opening and closing cam; 43, control board; 44, tooth shaft; 45, baffle A; 46, toothed plate; 47, top block; 48, moving plate; 49, baffle B; 50, spring B. Detailed implementation manners

[0063] It should be noted that, hereinafter, in combination with the accompanying drawings provided by the present invention and the markings in the accompanying drawings, corresponding to the technical solutions of the present invention, the technical solutions of the present invention will be described in detail and completely. However, the described content is necessarily only one of the embodiments presented by the technical solutions of the present invention, and cannot cover all the content of the present invention. Therefore, based on the embodiments cited in the present invention, any embodiments derived without substantial creation by those skilled in the art will fall within the protection scope of the present invention.

[0064] Embodiment: As shown in Figures 1 - 2 , it includes: a cabinet body 0; a control cabinet 2 fixedly installed on the front side of the cabinet body 1, and the control cabinet 2 is arranged in the middle of the cabinet body 1; a connection cabinet 3 fixedly installed at the bottom of the cabinet body 1; a connector A4 fixedly installed in the connection cabinet 3, and the connector A4 is used to connect a cable head 5; a test cabinet 6 fixedly installed on the front side of the cabinet body 1, and the test cabinet 6 is located at the upper part of the cabinet body 1; a circuit breaker cabinet 7 fixedly installed on the front side of the cabinet body 1, and the circuit breaker cabinet 7 is located in the middle of the upper part of the cabinet body 1; the control cabinet 2, the connection cabinet 3, the test cabinet 6, and the circuit breaker cabinet 7 are all provided with openable cabinet doors for convenient use of each functional cabinet.

[0065] As shown in Figure 3 , Figure 4 , Figure 7 , Figure 8 and Figure 9 , it further includes: a mounting plate 8 fixedly installed in the cabinet body 1, and the mounting plate 8 is located at the rear side of the control cabinet 2, the connection cabinet 3, the test cabinet 6, and the circuit breaker cabinet 7, separating an independent space in the rear part of the cabinet body 1, and the space is filled with sulfur hexafluoride to achieve insulation protection; a conductive connection plate A9 fixedly installed at the top inside the cabinet body 1, and the conductive connection plate A9 is located in the space; connectors B10 fixedly installed on both sides of the conductive connection plate A9, through the connectors B10, two ring main units can be connected to each other to form a ring main line, or the ring main unit can be directly connected to power distribution equipment; a mounting rack 11 fixedly installed on the back of the mounting plate 8; a contact A12 fixedly installed on the mounting rack 11, and a sub-end A13 for connection is arranged on the contact A12, and an arc suppression coil is arranged on the contact A12 to protect it; a conductive connection plate B14 fixedly installed between the conductive connection plate A9 and the contact A12, and the conductive connection plate B14 is electrically connected to the contact A12 and the connector B00.

[0066] As shown in Figure 3 , Figure 5 , Figure 7 , Figure 8 and Figure 9As shown, it further includes: a test head 15 fixedly installed on the back of the mounting plate 8, the test head 15 passes through the mounting plate 8 and is electrically connected to the test cabinet 6; a conductive connection plate C16 fixedly installed on the test head 15; a contact B17 fixedly installed on the mounting frame 11, and a sub-end B18 for connection is provided on the contact B17; a conductive connection plate D19 fixedly installed between the conductive connection plate C16 and the contact B17, and the conductive connection plate D19 and the conductive connection plate C16 are electrically connected to the contact B17 and the test head 15.

[0067] Combined with Figure 3 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 As shown, it further includes: a cross frame 20 fixedly installed on the back side of the mounting plate 8; a tool holder 21 fixedly installed on the cross frame 20, and a sub-end C22 for connection is provided on the tool holder 21; an isolating knife 23 rotatably installed on the sub-end C22, and the isolating knife 23 rotates to be electrically connected to the sub-end A13 of the contact A12 or the sub-end B18 of the contact B17; a conductive wiring 24 fixedly installed between the connector A4 and the tool holder 21, the conductive wiring 24 is electrically connected to the tool holder 21 and the connector A4. After the cable head 5 is connected to the connector A4, it will conduct electricity to the tool holder 20, and through the rotation of the isolating knife 23, the final conduction is switched to the connector B10 / test head 15.

[0068] Combined with Figure 2 、 Figure 3 and Figure 10 As shown, it further includes: an installer 25 fixedly installed in the control cabinet 2; a rotating shaft A26 rotatably installed between the installer 25 and the mounting frame 11, the rotating shaft A26 passes through the mounting plate 8 and is rotatably connected to the mounting plate 8 using a bearing. An insulating section is provided on the rotating shaft A26 near the mounting plate 8 to prevent leakage of electricity into the control cabinet 2 and improve the operating safety of the ring main unit; a C rotating frame 27 rotatably installed on the rotating shaft A26, and the end of the C rotating frame 27 is rotatably installed with the isolating knife 23, so that the rotation of the rotating shaft A26 can control the rotation of the isolating knife 23.

[0069] Combined with Figure 10As shown, it further includes: a turning handle 28 rotatably mounted on the installer 25, with two turning handles 28 provided; an eccentric plate A29 fixedly mounted on the turning handle 28; a V-shaped turning plate 30 fixedly mounted on the front end of the rotating shaft A26; connecting arms 31 respectively slidably and rotatably mounted between the two eccentric plates A29 and the V-shaped turning plate 30, such that both turning handles 28 can control the rotation of the rotating shaft A26. One of the turning handles 28 is used to control the switching of the isolating knife 23 between the open state without any connection and the closed state connected to the contact A12, and the other turning handle 28 is used to control the switching of the isolating knife 23 between the open state and the grounded state connected to the contact B17; eccentric plates B32 respectively fixedly mounted on the two turning handles 28; a connecting column 33 rotatably mounted between the eccentric parts of the two eccentric plates B32, and the connecting column 33 is a telescopic rod structure; a spring A34 fixedly mounted between the two eccentric plates B32, and the spring A34 is sleeved on the connecting column 33, and the spring A34 will cause one eccentric plate B32 to rotate synchronously while causing the other eccentric plate B32 to rotate.

[0070] Combined with Figure 11 As shown, it further includes: a one-way operating handle for controlling the rotation of the turning handle 28, and the one-way operating handle includes: a central shaft 35; a rotating rod 36 fixedly mounted on the central shaft 35, and the rotating rod 36 is perpendicular to the central shaft 35; one-way bearings 37 fixedly mounted at the upper and lower ends of the central shaft 35; an inner corner rotating cylinder 38 rotatably mounted on the one-way bearings 37, and the inner corner rotating cylinder 38 cooperates with the turning handle 28.

[0071] Combined with Figure 3 and Figure 12 As shown, it further includes: a circuit breaker 39 fixedly mounted on the back side of the mounting plate 8, and the circuit breaker 39 is electrically connected to the contact A12; a control end 40 slidably mounted on the circuit breaker 39, and the control end 40 moves up and down to control the opening and closing of the circuit breaker 39; a rotating shaft B41 rotatably mounted on the installer 25, and the rotating shaft B41 passes through the mounting plate 8 and is rotatably connected to the mounting plate 8 using a bearing, and the rotating shaft B41 is an insulating shaft; an opening and breaking cam 42 fixedly mounted on the rotating shaft B41, and an arc-shaped track is provided on the opening and breaking cam 42, and the distances from the two ends of the track to the rotating shaft B41 are different, and the upper part of the control end 40 is slidably mounted in the arc-shaped track on the opening and breaking cam 42; a control plate 43 fixedly mounted on the front end of the rotating shaft B41, and the control plate 43 is used to control the rotation of the rotating shaft B41.

[0072] Combined with Figure 2 and Figure 14 As shown, it further includes: a toothed shaft 44 fixedly mounted on the front side of the rotating shaft A26; a baffle plate A45 rotatably mounted on the installer 25; a toothed plate 46 fixedly mounted on the end of the baffle plate A45, and the toothed plate 46 meshes with the toothed shaft 44. When one of the turning handles 28 is used to rotate the rotating shaft A26, it will control the baffle plate A45 to block in front of the other turning handle 28.

[0073] Combined with Figures 2 - 15 As shown, it further includes: a top block 47 fixedly installed at the front end of the rotating shaft B41; a moving plate 48 slidably installed on the installer 25; a baffle B49 fixedly installed at the bottom of the moving plate 48; a spring B50 fixedly installed between the installer 25 and the moving plate 48. When the rotating shaft B41 is controlled to enable the circuit breaker 39, the control baffle B49 will be blocked in front of the rotating handle 28.

[0074] Working principle:

[0075] 0. In the ring main unit, for the rotating handle 28 rotated by the one-way operating handle: First, insert the inner angle rotating cylinder 38 onto the rotating handle 28, and then rotate the rotating rod 36. When the rotation direction is reverse to the direction of the one-way bearing 37, the central shaft 35 cannot rotate relative to the inner angle rotating cylinder 38. Therefore, rotating the rotating rod 36 can control the rotation of the rotating handle 28; during this process, if the rotating rod 36 is rotated in the reverse direction due to an operation error, the direction at this time will be in the same direction as the rotation direction of the one-way bearing 37. Therefore, the central shaft 35 rotates relative to the inner angle rotating cylinder 38, causing the central shaft 35 to rotate idly, and the inner angle rotating cylinder 38 and the rotating handle 28 will not be driven to rotate in reverse together, so that the rotating handle 28 can rotate stably during the process of rotating in the same direction. Since the situation of the isolating switch 23 cannot be observed during operation, using the one-way operating handle can prevent rotation errors caused by mistakes, and further prevent it from affecting the judgment of controlling the rotation of the rotating handle 28.

[0076] 2. Combined with Figure 10 , when controlling the rotation of the rotating handle 28: The rotating handle 28 on the right rotates clockwise, which will push down the connecting arm 31 through the eccentric plate A29 and rotate the V-shaped plate 30 counterclockwise, control the rotating shaft A26 to rotate counterclockwise, and control the isolating switch 23 to rotate to the open state; the rotating handle 28 on the right rotates counterclockwise, which will pull up the connecting arm 31 and rotate the V-shaped plate 30 clockwise, control the rotating shaft A26 to rotate clockwise, and control the isolating switch 23 to rotate from the open state to the closed state; the rotating handle 28 on the left rotates clockwise, which will pull the connecting arm 31 to the left through the eccentric plate A29 and rotate the V-shaped plate 30 clockwise, control the rotating shaft A26 to rotate clockwise, and control the isolating switch 23 to rotate to the open state; the rotating handle 28 on the left rotates counterclockwise, which will push the connecting arm 31 to the right and rotate the V-shaped plate 30 counterclockwise, control the rotating shaft A26 to rotate counterclockwise, and control the isolating switch 23 to rotate from the open state to the grounded state.

[0077] During the process of separately controlling the rotation of the two rotating handles 28, the rotation of one eccentric plate A29 will squeeze the spring A34 to deform, and the deformation of the spring A34 will squeeze the other eccentric plate A29 to rotate. Therefore, the spring A34 can quickly recover from the deformation, and further drive the actively rotating eccentric plate A29 to quickly rotate to the target position, thus realizing rapid opening and closing.

[0078] During the rotation of the handles 28, when one of the handles 28 rotates the rotating shaft A26, the cooperation between the gear shaft 44 and the gear plate 46 blocks the control baffle A45 in front of the other handle 28, so that it is not easy to confuse the two handles 28 when operating the handles 28, and it is not easy to confuse the rotation state of the isolation knife 23 controlled by the rotating shaft A26.

[0079] 4. Combination Figure 12 When the control panel 43 is used to rotate the rotating shaft B41, when the rotating shaft B41 and the breaking cam 42 rotate clockwise, the control end 40 will move up to open the circuit breaker 39; and when the rotating shaft B41 and the breaking cam 42 rotate counterclockwise, the control end 40 will move down to close the circuit breaker 39.

[0080] When the rotating shaft B41 rotates to control the circuit breaker 39 to close, the rotating top block 47 squeezes the movable plate 48 to move downward, the spring B50 is stretched, and the baffle B49 is moved to block the rotating handle 28. Conversely, the top block 47 is reversed, the spring B50 moves the movable plate 48 upward and the baffle B49 upward, and the baffle B49 is controlled to cancel the blocking of the rotating handle 28; the setting of the baffle B49 can prevent the control from using the rotating handle 28 when the circuit breaker 39 is closed, so as to prevent power conflicts.

[0081] When the ring main unit needs to be tested, the operating sequence of the ring main unit should be:

[0082] Turn the right handle 28 counterclockwise to control the shaft A26 to rotate clockwise and control the isolating knife 23 to close. After completion, turn the shaft B41 counterclockwise to close the circuit breaker 39. At this point, the ring main unit completes the closing action and can be tested. When the ring main unit needs to be continued to be used after the test is completed, rotate the shaft B41 clockwise to open the circuit breaker 39. Then, turn the right handle 28 clockwise to control the shaft A26 to rotate counterclockwise and control the isolating knife 23 to open. Finally, when the isolating knife 23 is open, turn the left handle 28 counterclockwise to make the shaft A26 rotate counterclockwise to ground the isolating knife 23.

[0083] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A sulfur hexafluoride insulated ring main unit with a test head, characterized in that: include: Cabinet (1); A connection cabinet (3) fixedly connected to the cabinet body (1); A connector A (4) fixedly connected to the connection cabinet (3) and used for connecting the cable head (5); A mounting plate (8) fixedly connected to the cabinet (1), the mounting plate (8) separating an independent space in the cabinet (1), the space being filled with sulfur hexafluoride for insulation protection; A connector B (10) fixedly connected to the cabinet (1) for connecting to a power distribution device / another ring main cabinet; A mounting frame (11) fixedly connected to the mounting plate (8); A contact A (12) fixedly connected to the mounting frame (11), the contact A (12) being electrically connected to the connector B (10); A test cabinet (6) fixedly connected to the cabinet body (1); A test head (15) fixedly connected to the mounting plate (8), the test head (15) being electrically connected to the test cabinet (6); A contact B (17) fixedly connected to the mounting frame (11), the contact B (17) being electrically connected to the test head (15); A cross frame (20) fixedly connected to the mounting plate (8); A knife holder (21) is fixedly connected to the horizontal frame (20), and the knife holder (21) is electrically connected to the connector A (4); an isolating knife (23) is rotatably connected to the knife holder (21), and the isolating knife (23) is rotated to be electrically connected to the contact A (12) / contact B (17).

2. The sulfur hexafluoride insulated ring main unit with a test head according to claim 1, characterized in that: Also includes: A control cabinet (2) fixedly connected to the cabinet body (1); A mounter (25) fixedly mounted in the control cabinet (2); Rotating a rotating shaft A (26) connected between the mounter (25) and the mounting frame (11); A C rotating frame (27) is rotatably connected to the rotating shaft A (26), and an end of the C rotating frame (27) is rotatably connected to the isolation knife (23).

3. The sulfur hexafluoride insulated ring main unit with a test head according to claim 2, characterized in that: Also includes: Rotating a rotating handle (28) connected to the mounting device (25), wherein two rotating handles (28) are provided; An eccentric plate A (29) fixedly connected to the rotating handle (28); A V-shaped rotating plate (30) fixedly connected to the rotating shaft A (26); Connecting arms (31) respectively slidably and rotatably connected between the eccentric plates A (29) and the V-rotation plates (30); Eccentric plates B (32) respectively fixedly connected to the two rotating handles (28); A connecting post (33) rotatably connected between the eccentric portions of the two eccentric plates B (32); A spring A (34) is fixedly connected between two eccentric plates B (32).

4. The sulfur hexafluoride insulated ring main unit with a test head according to claim 3, characterized in that: Also includes: A one-way operating handle for controlling the rotation of a rotating handle (28).

5. The sulfur hexafluoride insulated ring main unit with a test head according to claim 4, characterized in that: The one-way operating handle comprises: a central axis (35); A rotating rod (36) fixedly connected to the central axis (35), wherein the rotating rod (36) is perpendicular to the central axis (35); One-way bearings (37) fixedly connected to the upper and lower ends of the central shaft (35); The inner angle rotating cylinder (38) connected to the one-way bearing (37) is rotatably engaged with the rotating handle (28).

6. The sulfur hexafluoride insulated ring main unit with a test head according to claim 5, characterized in that: Also includes: A circuit breaker cabinet (7) fixedly connected to the cabinet body (1), wherein an installer (25) is fixedly connected inside the circuit breaker cabinet (7); A circuit breaker (39) fixedly connected to the mounting plate (8), the circuit breaker (39) being electrically connected to the contact A (12); A control terminal (40) slidably connected to the circuit breaker (39) for controlling the opening and closing of the circuit breaker (39); Rotating a rotating shaft B (41) connected to the mounter (25); A disconnecting cam (42) is fixedly connected to the rotating shaft B (41), and the disconnecting cam (42) is connected to the control end (40). The disconnecting cam (42) rotates to enable the control end (40) to open and close the circuit breaker (39).

7. The sulfur hexafluoride insulated ring main unit with a test head according to claim 6, characterized in that: Also includes: A gear shaft (44) fixedly connected to the rotating shaft A (26); Rotating a baffle A (45) connected to the mounter (25) for shielding the rotating handle (28); A tooth plate (46) is fixedly connected to the end of the baffle A (45), and the tooth plate (46) is meshed with the gear shaft (44).

8. The sulfur hexafluoride insulated ring main unit with a test head according to claim 7, characterized in that: Also includes: A top block (47) fixedly connected to the rotating shaft B (41); A movable plate (48) slidably connected to the mounter (25); A baffle plate B (49) fixedly connected to the movable plate (48) and used for shielding the rotating handle (28); A spring B (50) is fixedly connected between the mounter (25) and the moving plate (48).

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