A phase-changing withstand voltage test device for three-phase common-compartment products

Abstract

The present invention discloses a phase-changing withstand voltage test device for three-phase co-compartment products, including a first insulator, the top of the first insulator is fixedly connected to a shell, the top of the shell is fixedly connected to a second insulator, the top of the second insulator is fixedly connected to an access end, and the bottom of the access end is fixedly connected to an upper contact seat and two joint spring heads. The invention completes the connection and docking of a single phase column, and at this time, the static contacts on the other two phase columns just contact with the two joint spring heads to achieve grounding. The three phase columns can repeat the above process and switch, and ensure that the other two non-test phase columns always remain grounded without disassembly and cutting, keeping the entire closed air chamber closed, and without repeated filling and deflation, thereby achieving the advantages of not needing to charge and discharge sulfur hexafluoride gas multiple times, flexible and efficient switching, and keeping the non-test phase grounded, improving the safety and accuracy of the test, and being economical, stable and safe.

Description

Technical Field

[0001] The present invention relates to the field of high voltage electrical technology, and more specifically to a phase-changing voltage withstand test device for a three-phase common-compartment product. Background Art

[0002] GIL products are tested on a single phase basis, while three-phase common box products are tested by manually disassembling the conductors for phase change. For the testing of three-phase common box products, there is currently a conversion mechanism for testing three-phase common box GIL equipment, which is used to test the electrical performance of the voltage transformer. In its structure, the three-phase conductor is vertically fixed on the first insulator, and the starting end of the direct connection conductor is fixed to the second insulator. The two are connected by an S-type connecting conductor, which is connected in a detachable manner. The S-type connecting conductor can be rotated by the center of the shell to connect different phase sequences.

[0003] In addition, there is currently a technology for a common-box busbar conversion device that can realize the phase change of the three-phase conductors in a three-phase common compartment; there is also a technology for using telescopic conductors for testing.

[0004] Existing testing technology has limitations for testing GIL products. It is inconvenient and outdated to manually disassemble the conductor for phase change, and the test requires multiple charging and discharging of sulfur hexafluoride gas, which is costly. At the same time, its cumbersome operation leads to low test efficiency. In addition, the other two phases cannot be grounded during the test, and safety and test parameters cannot be guaranteed. With the development of the power grid, the number of three-phase co-box GILs arranged in the form of cable outlets is increasing, and their economy, efficiency, and safety need to be addressed. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a phase-changing voltage withstand test device for three-phase co-warehouse products to solve the background technical problems.

[0006] To achieve the above object, the present invention adopts the following technical solution:

[0007] A phase-changing withstand voltage test device for a three-phase common warehouse product, comprising a first insulator, wherein the top of the first insulator is fixedly connected to a shell, the top of the shell is fixedly connected to a second insulator, the top of the second insulator is fixedly connected to an access end, the bottom of the access end is fixedly connected to an upper contact seat and two joint spring heads, the first insulator is rotatably connected to a rotating seat, three phase columns are plugged into the rotating seat, a static contact is fixedly installed on the top of the phase column, the static contact is in contact with the upper contact seat and the joint spring head, the second insulator is fixedly connected to an arc contact seat, the bottom of the phase column is fixedly connected to an L-shaped contact, the horizontal end of the L-shaped contact is plugged into the outside of the rotating seat and in contact with the arc contact seat, a cover is detachably installed on the right side of the shell, a driving mechanism is installed on the cover, the driving mechanism is connected and matched with the three phase columns, two charging and discharging joints are fixedly connected to the left side of the shell, a humidity control mechanism is installed between the charging and discharging joint located below and the first insulator, and a humidity sensor is fixedly installed inside the shell.

[0008] The humidity control mechanism includes an air pump, a first three-way branch pipe, a humidifying box, a drying box, a second three-way branch pipe and two solenoid valves. The air pump is fixedly installed on the left side of the shell and its input end extends to the inside of the shell. The output end of the air pump is fixedly connected to the first three-way branch pipe, and the other two ends of the first three-way branch pipe are respectively connected and fixed to the humidifying box and the drying box. The bottom of the humidifying box is fixedly connected to the first insulator, one side of the drying box is fixedly connected to the outside of the shell, the top of the humidifying box and the drying box are connected and fixed to the two ends of the second three-way branch pipe, and the other end of the second three-way branch pipe is connected and fixed to the charging and discharging joint located below.

[0009] As a further description of the above technical solution: the driving mechanism includes a rotating rod, a gear, a gear ring and a turntable, one end of the rotating rod passes through the interior of the cover and is rotatably connected thereto, one end of the rotating rod is fixedly connected to the gear, the gear ring is sleeved and fixedly connected to the outside of the turntable, and the inside of the turntable is fixedly connected to three phase columns.

[0010] As a further description of the above technical solution: the upper contact seat includes a sliding column, a spring and a seat block, the top end of the sliding column penetrates into the interior of the access end and is slidably connected thereto, the bottom end of the sliding column is fixedly connected to the seat block, the spring is sleeved on the outside of the sliding column, the top end of the spring is fixedly connected to the access end, the bottom end of the spring is fixedly connected to the seat block, and the bottom of the seat block is in engagement contact with the static contact.

[0011] As a further description of the above technical solution: a reinforcing column is fixedly connected to the interior of the rotating seat, and the top end of the reinforcing column is plugged and fixed to the top of the turntable.

[0012] As a further description of the above technical solution: an arc-shaped groove is provided inside the arc-shaped contact seat, and the horizontal end of the L-shaped contact is in sliding contact with the inside of the arc-shaped groove.

[0013] As a further description of the above technical solution: two inwardly concave spring sheets are fixedly connected inside the arc-shaped groove, and grooves matching with the inwardly concave spring sheets are formed at the top and the bottom of the L-shaped contact.

[0014] As a further description of the above technical solution: the outer side of the shell is detachably connected with a charging and discharging joint.

[0015] As a further description of the above technical solution: the top of the static contact is provided with an arc-shaped protrusion, and the bottom of the seat block is provided with an inner concave surface matching with the arc-shaped protrusion.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] This solution forms a closed air chamber through the first insulator shell, the second insulator and the cover, and can achieve adjustment without damaging the closed air chamber environment by using a driving mechanism, and has the advantages of convenient and flexible operation.

[0018] This solution synchronously adjusts the three phase columns through a driving mechanism, so that when one of the three phase columns is connected to the upper contact seat for testing, the other two phase columns are guaranteed to always be in contact with the connector spring head and remain grounded, thereby improving the test safety and parameter accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front cross-sectional structural schematic diagram of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0021] Figure 3 It is a partial three-dimensional structural schematic diagram of the present invention;

[0022] Figure 4 It is a schematic diagram of the top view structure of the present invention;

[0023] Figure 5 It is a partial three-dimensional structural schematic diagram of the present invention;

[0024] Figure 6 It is a partial side structural schematic diagram of the present invention.

[0025] Description of the numbers in the figure:

[0026] 1. First insulator; 2. Shell; 3. Second insulator; 4. Access terminal; 5. Upper contact seat; 51. Sliding column; 52. Spring; 53. Seat block; 531. Inner concave surface; 6. Rotating seat; 61. Reinforcement column; 7. Phase column; 8. Static contact; 81. Arc-shaped protrusion; 9. Joint spring piece head; 10. Arc-shaped contact seat; 101. Arc-shaped groove; 1011. Inner concave spring piece; 11. L-shaped contact; 111. Groove; 12. Cover; 13. Driving mechanism; 131. Rotating rod; 132. Gear; 133. Gear ring; 134. Turntable; 14. Charge and discharge joint; 15. Humidity control mechanism; 151. Vacuum pump; 152. First three-way branch pipe; 153. Humidifier box; 154. Drying box; 155. Second three-way branch pipe; 156. Solenoid valve; 16. Humidity sensor. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] See also Figure 1-6 In the present invention, a phase-changing withstand voltage test device for a three-phase common warehouse product includes a first insulator 1, a housing 2 is fixedly connected to the top of the first insulator 1, a second insulator 3 is fixedly connected to the top of the housing 2, an access terminal 4 is fixedly connected to the top of the second insulator 3, an upper contact seat 5 and two joint spring heads 9 are fixedly connected to the bottom of the access terminal 4, a rotating seat 6 is rotatably connected to the first insulator 1, three phase columns 7 are plugged into the rotating seat 6, a static contact 8 is fixedly installed on the top of the phase column 7, the static contact 8 is in contact with the upper contact seat 5 and the joint spring head 9, and the second insulator An arc-shaped contact seat 10 is fixedly connected to the insulator 3, an L-shaped contact 11 is fixedly connected to the bottom of the phase column 7, the horizontal end of the L-shaped contact 11 is inserted into the outside of the rotating seat 6 and contacts and cooperates with the arc-shaped contact seat 10, a cover 12 is detachably installed on the right side of the shell 2, a driving mechanism 13 is installed on the cover 12, and the driving mechanism 13 is connected and cooperated with the three phase columns 7, two charging and discharging joints 14 are fixedly connected to the left side of the shell 2, a humidity control mechanism 15 is installed between the charging and discharging joint 14 located below and the first insulator 1, and a humidity sensor 16 is fixedly installed inside the shell 2.

[0029] The humidity control mechanism 15 includes an air pump 151, a first three-way branch pipe 152, a humidifying box 153, a drying box 154, a second three-way branch pipe 155 and two solenoid valves 156. The air pump 151 is fixedly installed on the left side of the shell 2 and the input end extends to the inside of the shell 2. The output end of the air pump 151 is fixedly connected to the first three-way branch pipe 152, and the other two ends of the first three-way branch pipe 152 are respectively connected and fixed to the humidifying box 153 and the drying box 154. The bottom of the humidifying box 153 is fixedly connected to the first insulator 1, and one side of the drying box 154 is fixedly connected to the outside of the shell 2. The tops of the humidifying box 153 and the drying box 154 are connected and fixed to the two ends of the second three-way branch pipe 155, and the other end of the second three-way branch pipe 155 is connected and fixed to the charging and discharging joint 14 located below.

[0030] In the present invention, a closed air chamber is formed by the first insulator 1 shell 2, the second insulator 3 and the cover 12. When in use, the driving mechanism 13 is used to drive the three phase columns 7 and the rotating seat 6 to rotate, and the static contact 8 on the top of one of the phase columns 7 is rotated to contact the upper contact seat 5, and the upper contact seat 5 is squeezed to move upward, so that the static contact 8 is completely engaged with the upper contact seat 5. At this time, the rotating seat 6 at the bottom rotates synchronously, so that the L-shaped contact 11 connected to the phase column 7 where the static contact 8 is located is also rotated to the internal contact connection of the arc-shaped contact seat 10. At this time, the connection and docking of a single phase column 7 is completed, and at this time, the static contacts 8 on the other two phase columns 7 are just in contact with the two connector spring heads 9 to achieve grounding. The three phase columns 7 can repeat the above process for switching, and ensure that the other two non-test phase columns 7 are always grounded without disassembly and cutting, keeping the entire closed air chamber closed without repeated filling and deflation.

[0031] Before the test begins, the detection value of the humidity sensor 16 can be read through the external control terminal, and sulfur hexafluoride gas is flushed into the entire humidity control mechanism 15, the air is emptied, and distilled water is flushed into the humidification box 153 and a certain amount of space is reserved to detect the humidity of the sulfur hexafluoride gas inside the shell 2. In order to make the test more realistic, the vacuum pump 151 can be started to extract the sulfur hexafluoride gas inside the shell 2, and according to needs, the two solenoid valves 156 can be controlled respectively to allow the sulfur hexafluoride gas to enter different paths. When it is necessary to humidify the sulfur hexafluoride gas in accordance with the actual air humidity, this When the solenoid valve 156 of the path where the humidifying box 153 is located is opened, the sulfur hexafluoride gas is humidified by distilled water, and the humidity sensor 16 detects the humidity value in real time until the required humidity is reached and the circulation is stopped. Similarly, the solenoid valve 156 of the path where the drying box 154 is located can be opened to dry and dehumidify the sulfur hexafluoride gas. The drying box 154 uses a high-adsorption activated carbon filter to achieve water vapor adsorption to meet different humidity requirements, and realizes flexible adjustment of the humidity of the test environment inside the shell 2. The test is more in line with the actual use environment, and is conducive to testing more extreme data, and the test is more comprehensive.

[0032] The device thus has the advantages of not needing to charge and discharge sulfur hexafluoride gas multiple times, flexible and efficient switching, keeping the non-test phase grounded, improving test safety and accuracy, good economy, stability and safety, convenient and flexible regulation of the test environment humidity, and more comprehensive testing. It solves the problems in the prior art that sulfur hexafluoride gas needs to be charged and discharged multiple times during testing, which is costly; at the same time, its cumbersome operation leads to low test efficiency; and when conducting the test, the other two phases cannot be grounded, safety and test parameters cannot be guaranteed, and the operation is inflexible.

[0033] See also Figure 1 , wherein: the driving mechanism 13 includes a rotating rod 131, a gear 132, a gear ring 133 and a turntable 134, one end of the rotating rod 131 penetrates into the interior of the cover 12 and is rotatably connected thereto, one end of the rotating rod 131 is fixedly connected to the gear 132, the gear ring 133 is sleeved and fixedly connected to the outer side of the turntable 134, and the interior of the turntable 134 is fixedly connected to the three phase columns 7.

[0034] In the present invention, the rotating rod 131 drives the gear 132 to rotate, thereby driving the gear ring 133 to rotate, thereby driving the turntable 134 to rotate, thereby driving the three phase columns 7 and the rotating seat 6 to rotate synchronously, and realizing flexible switching of the phase column 7 to connect with the upper contact seat 5 and the arc contact seat 10. The operation is convenient and flexible, and there is no need to disassemble and charge and discharge the gas.

[0035] See also Figure 2, wherein: the upper contact seat 5 includes a sliding column 51, a spring 52 and a seat block 53, the top end of the sliding column 51 penetrates into the interior of the access end 4 and is slidably connected thereto, the bottom end of the sliding column 51 is fixedly connected to the seat block 53, the spring 52 is sleeved on the outside of the sliding column 51, the top end of the spring 52 is fixedly connected to the access end 4, the bottom end of the spring 52 is fixedly connected to the seat block 53, and the bottom of the seat block 53 is engaged with the static contact 8.

[0036] In the present invention, when the phase column 7 moves, the static contact 8 is driven to move synchronously to contact and squeeze the seat block 53 upward to compress the spring 52 to drive the sliding column 51 to slide upward, so that the static contact 8 can move to be completely aligned with the seat block 53 and maintain stable docking, thereby improving the test stability.

[0037] See also Figure 1 , wherein: a reinforcing column 61 is fixedly connected inside the rotating seat 6 , and the top end of the reinforcing column 61 is plugged and fixed to the top of the rotating disk 134 .

[0038] In the present invention, the connection between the rotating disk 134 and the phase column 7 is reinforced by the reinforcing column 61, so that the stability during the rotation and switching is better.

[0039] See also Figure 4 and Figure 5 , wherein: an arc-shaped groove 101 is opened inside the arc-shaped contact seat 10, and the horizontal end of the L-shaped contact 11 is in sliding contact with the inside of the arc-shaped groove 101.

[0040] In the present invention, the arc groove 101 allows the horizontal end of the L-shaped contact 11 to smoothly slide into the arc groove 101 when rotating outside the rotating seat 6, and can also smoothly detach with the rotation during switching, so the structure is reasonable and efficient.

[0041] See also Figure 4 , Figure 5 and Figure 6 , wherein: two concave spring pieces 1011 are fixedly connected inside the arc-shaped groove 101 , and grooves 111 matching with the concave spring pieces 1011 are formed at the top and bottom of the L-shaped contact 11 .

[0042] In the present invention, the groove 111 cooperates with the concave spring piece 1011 , so that when the L-shaped contact 11 rotates to the inside of the arc groove 101 , the two concave spring pieces 1011 are respectively pressed and contacted to the inside of the two grooves 111 , thereby improving the contact stability.

[0043] See also Figure 1 , wherein: the outer side of the shell 2 is detachably connected with a charging and discharging joint 14.

[0044] In the present invention, the detachable gas charging and discharging connector 14 can be installed to facilitate the injection of sulfur hexafluoride gas at the beginning of the test, and it is also convenient to recover the gas after the test to reduce costs, which is convenient and flexible.

[0045] See also Figure 2 , wherein: an arc-shaped protrusion 81 is provided on the top of the stationary contact 8 , and an inner concave surface 531 matching with the arc-shaped protrusion 81 is provided on the bottom of the seat block 53 .

[0046] In the present invention, by cooperating with the inner concave surface 531, when the static contact 8 and the seat block 53 are completely docked, a docking collision sound will be generated, which is convenient for judgment and ensures the stability of the connection. The arc curve also reduces the resistance of the device when adjusting.

[0047] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A phase-changing withstand voltage test device for a three-phase common-compartment product, comprising a first insulator (1), characterized in that: The top of the first insulator (1) is fixedly connected to a housing (2), the top of the housing (2) is fixedly connected to a second insulator (3), the top of the second insulator (3) is fixedly connected to an access end (4), the bottom of the access end (4) is fixedly connected to an upper contact seat (5) and two joint spring heads (9), the first insulator (1) is rotatably connected to a rotating seat (6), three phase columns (7) are plugged into the rotating seat (6), a static contact (8) is fixedly mounted on the top of the phase column (7), the static contact (8) is in contact with and cooperates with the upper contact seat (5) and the joint spring head (9), the second insulator (3) is fixedly connected to an arc-shaped contact seat (1 0), an L-shaped contact (11) is fixedly connected to the bottom of the phase column (7), the horizontal end of the L-shaped contact (11) is plugged into the outside of the rotating seat (6) and contacts and cooperates with the arc-shaped contact seat (10), a cover (12) is detachably installed on the right side of the shell (2), a driving mechanism (13) is installed on the cover (12), and the driving mechanism (13) is connected and cooperates with the three phase columns (7), two charging and discharging joints (14) are fixedly connected to the left side of the shell (2), a humidity control mechanism (15) is installed between the charging and discharging joint (14) located at the bottom and the first insulator (1), and a humidity sensor (16) is fixedly installed inside the shell (2); The humidity control mechanism (15) comprises an air extraction pump (151), a first three-way branch pipe (152), a humidifying box (153), a drying box (154), a second three-way branch pipe (155) and two solenoid valves (156); the air extraction pump (151) is fixedly mounted on the left side of the housing (2) and its input end extends into the interior of the housing (2); the output end of the air extraction pump (151) is fixedly connected to the first three-way branch pipe (152); the other two ends of the first three-way branch pipe (152) are connected to the second three-way branch pipe (155). The ends are respectively connected and fixed to a humidifying box (153) and a drying box (154); the bottom of the humidifying box (153) is fixedly connected to the first insulator (1); one side of the drying box (154) is fixedly connected to the outside of the shell (2); the tops of the humidifying box (153) and the drying box (154) are connected and fixed to the two ends of a second three-way branch pipe (155); the other end of the second three-way branch pipe (155) is connected and fixed to a gas charging and discharging joint (14) located below.

2. According to claim 1, a phase-change withstand voltage test device for three-phase co-storage products is characterized by: The driving mechanism (13) comprises a rotating rod (131), a gear (132), a gear ring (133) and a rotating disk (134); one end of the rotating rod (131) penetrates into the interior of the cover (12) and is rotatably connected thereto; one end of the rotating rod (131) is fixedly connected to the gear (132); the gear ring (133) is sleeved and fixedly connected to the outside of the rotating disk (134); and the interior of the rotating disk (134) is fixedly connected to three phase columns (7).

3. According to claim 1, a phase-change withstand voltage test device for three-phase co-storage products is characterized by: The upper contact seat (5) comprises a sliding column (51), a spring (52) and a seat block (53); the top end of the sliding column (51) penetrates into the interior of the access end (4) and is slidably connected thereto; the bottom end of the sliding column (51) is fixedly connected to the seat block (53); the spring (52) is sleeved on the outside of the sliding column (51); the top end of the spring (52) is fixedly connected to the access end (4); the bottom end of the spring (52) is fixedly connected to the seat block (53); and the bottom of the seat block (53) is in engagement contact with the stationary contact (8).

4. The phase-change withstand voltage test device for three-phase co-storage products according to claim 2 is characterized in that: A reinforcing column (61) is fixedly connected inside the rotating seat (6), and the top end of the reinforcing column (61) is plugged and fixed to the top of the rotating disk (134).

5. The phase-change withstand voltage test device for three-phase co-storage products according to claim 1 is characterized in that: An arc-shaped groove (101) is provided inside the arc-shaped contact seat (10), and a horizontal end of the L-shaped contact (11) is in sliding contact with the inside of the arc-shaped groove (101).

6. The phase-change withstand voltage test device for three-phase co-storage products according to claim 5, characterized in that: Two inwardly concave spring sheets (1011) are fixedly connected inside the arc-shaped groove (101), and grooves (111) matching with the inwardly concave spring sheets (1011) are provided at the top and the bottom of the L-shaped contact (11).

7. The phase-change withstand voltage test device for three-phase co-compartment products according to claim 3 is characterized in that: The top of the stationary contact (8) is provided with an arc-shaped protrusion (81), and the bottom of the seat block (53) is provided with an inner concave surface (531) that matches the arc-shaped protrusion (81).

Images