A high-voltage direct-current relay ceramic assembly explosion-proof test device

Abstract

The utility model relates to high -voltage direct current relay ceramic assembly explosion -proof test device, including the backing plate, sets up in the opening end of cover body, the backing plate, sets up in cover body on, hydraulic pump, connects backing plate, the chamber that the inside of cover body is connected after the hydraulic pump passes through backing plate, wherein, the backing plate contact kovale metal ring, the backing plate sets up kovale metal ring far from one side of cover body, the backing plate contact kovale metal ring, the backing plate sets up kovale metal ring close to one side of cover body, the sealing connection between backing plate and the backing plate. The utility model discloses through the chamber in the inside of cover body of backing plate seal. Again through the hydraulic pump gradually promotes the air pressure in the chamber, can test ceramic arc -extinguishing chamber's blast resistance. The test process only needs to fix the position of backing plate and the backing plate, and the efficiency of explosion -proof test is improved obviously in simple step.

Description

Technical Field

[0001] This utility model relates to the field of high voltage DC relay manufacturing technology, and in particular to a high voltage DC relay ceramic component explosion test device. Background Technology

[0002] The ceramic arc-extinguishing chamber of the high-voltage DC relay is filled with high-pressure hydrogen. As the relay is used, the temperature of the hydrogen will rise and its pressure will also rise.

[0003] Ceramic arc-extinguishing hoods need to possess high explosion resistance to contain high-pressure hydrogen gas and prevent the entire relay from exploding due to increased pressure. After production, ceramic arc-extinguishing hoods also require explosion resistance testing. The ceramic arc-extinguishing hood consists of the hood body and a brazed Kovar metal ring. The existing testing method involves welding an iron plate to the Kovar metal ring, which then blocks the opening of the ceramic arc-extinguishing hood to facilitate gas filling for explosion resistance testing. However, the welding connection is cumbersome, resulting in low testing efficiency. Furthermore, the welded iron plate cannot be reused, leading to high testing costs.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a charging and explosion test device for high voltage DC relay ceramic components, so as to simplify the charging and explosion test of ceramic arc extinguishing chambers.

[0006] The technical solution of this utility model is as follows: A high-voltage DC relay ceramic component charge-explosion test device, configured in conjunction with a ceramic arc-extinguishing shroud; the ceramic arc-extinguishing shroud includes a shroud body and a Kovar metal ring disposed at the opening end of the shroud body; the high-voltage DC relay ceramic component charge-explosion test device includes: A pad is provided at the opening end of the cover; A pressure plate is fitted onto the cover. A hydraulic pump is connected to the pad; the hydraulic pump passes through the pad and then connects to the internal chamber of the cover. The pad contacts the Kovar metal ring; the pad is located on the side of the Kovar metal ring away from the cover; the pressure plate contacts the Kovar metal ring; the pressure plate is located on the side of the Kovar metal ring closer to the cover; the pad and the pressure plate are sealed together.

[0007] A further technical solution is to provide a sealing ring between the pad and the pressure plate.

[0008] A further technical solution is that a first sealing groove is formed on the surface of the pad near the cover; the sealing ring is inserted into the first sealing groove; the sealing ring is close to the surface of the cover, protruding from the surface of the pad near the cover.

[0009] A further technical solution is that a second sealing groove is formed on the surface of the pressure plate near the pad; after the pressure plate and the pad are attached, the sealing ring is inserted into the second sealing groove.

[0010] A further technical solution is that a first connecting hole is opened on the pad and the pressure plate, aligned; a fastener is provided in the first connecting hole; the fastener passes through the pad and the pressure plate simultaneously along the first connecting hole to fix the pad and the pressure plate.

[0011] A further technical solution is to provide four of the first connection holes around the cover, on the pad and the pressure plate respectively.

[0012] A further technical solution is that a second connecting hole is opened on the pad; the hydraulic pump passes through the pad along the second connecting hole to connect to the chamber.

[0013] A further technical solution is that a connector is provided on the pad; the connector connects the hydraulic pump and the second connecting hole.

[0014] A further technical solution is to install a hydraulic gauge on the hydraulic pump.

[0015] The beneficial technical effects of this utility model are as follows: (1) The high-voltage DC relay ceramic component explosion test device of this utility model is equipped with a pad and a pressure plate. The pad and pressure plate are set on the opposite side of the Kovar metal ring and connected to fix the pad at the open end of the enclosure. The cavity inside the enclosure is sealed by the pad. At this time, the air pressure in the cavity is gradually increased by a hydraulic pump, and the explosion resistance performance of the ceramic arc-extinguishing chamber can be tested. This test process only requires fixing the position of the pad and pressure plate, and the steps are simple, which significantly improves the efficiency of the explosion test. Moreover, the pad and pressure plate can be connected by a detachable connection, which facilitates the reuse of the pad and pressure plate and reduces the test cost of the explosion test.

[0016] (2) Furthermore, a sealing ring is provided between the gasket and the pressure plate. The sealing ring fills the gap between the gasket and the pressure plate, ensuring the sealing performance between the gasket and the pressure plate.

[0017] (3) Further, a first sealing groove is provided on the pad and a second sealing groove is provided on the pressure plate to restrict the position of the sealing ring and prevent the sealing ring from moving and affecting the sealing performance between the pad and the pressure plate. Attached Figure Description

[0018] Figure 1 A schematic diagram of the explosion structure of a high-voltage DC relay ceramic component explosion test device according to an embodiment of the present disclosure is shown.

[0019] Figure 2 A side view of a high-voltage DC relay ceramic component explosion test apparatus according to an embodiment of the present disclosure is shown.

[0020] Figure 3 A cross-sectional view at point A is shown of a high-voltage DC relay ceramic component charging and explosion test apparatus according to an embodiment of the present disclosure.

[0021] Marked in the attached diagram: 1. Hydraulic pump; 11. Connector; 12. Hydraulic gauge; 2. Pad; 21. First sealing groove; 22. First connecting hole; 221. Fastener; 23. Second connecting hole; 3. Sealing ring; 4. Pressure plate; 41. Second sealing groove; 5. Ceramic arc extinguishing hood; 51. Chamber; 52. hood body; 521. Open end; 53. Kovar metal ring; 54. Conductor; 541. Conductive connection hole. Detailed Implementation

[0022] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0023] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Figure 1 A schematic diagram of the explosion structure of a high-voltage DC relay ceramic component explosion test device according to an embodiment of the present disclosure is shown. Figure 2 A side view of a high-voltage DC relay ceramic component explosion test apparatus according to an embodiment of the present disclosure is shown. Figure 3A cross-sectional view at point A is shown of a high-voltage DC relay ceramic assembly charging and explosion testing apparatus according to an embodiment of this disclosure. Please refer to... Figure 1 , Figure 2 and Figure 3 A high-voltage DC relay ceramic component charge-explosion test device is provided, which is used in conjunction with a ceramic arc-extinguishing chamber 5. The ceramic arc-extinguishing chamber 5 includes a chamber body 52 and a Kovar metal ring 53 disposed at the open end 521 of the chamber body 52. ​​The ceramic chamber body 52 has excellent insulation properties and high temperature resistance, making it suitable as an arc-extinguishing chamber. However, ceramics cannot be directly welded to metal parts such as housings and flanges to be fixed inside the relay. Therefore, the Kovar metal ring 53 is brazed onto the ceramic chamber body 52, and other metals are welded through the Kovar metal ring 53 to facilitate fixing the ceramic arc-extinguishing chamber 5 inside the relay. A conductive connection hole 541 is provided on the chamber body 52. ​​A copper conductor 54 is welded onto the conductive connection hole 541. The conductor 54 blocks the conductive connection hole 541. The high-voltage DC relay ceramic component charge-explosion test device includes a pad 2 disposed at the open end 521 of the chamber body 52. ​​A pressure plate 4 is sleeved on the chamber body 52. ​​A hydraulic pump 1 is connected to the pad 2. In some embodiments, the hydraulic pump 1 can be a commercially available Parker P1 series variable displacement piston pump. Hydraulic pump 1 passes through pad 2 and connects to the internal chamber 51 of the enclosure 52. Pad 2 contacts the Kovar metal ring 53. Pad 2 is positioned on the side of the Kovar metal ring 53 furthest from the enclosure 52. Pressure plate 4 contacts the Kovar metal ring 53. Pressure plate 4 is positioned on the side of the Kovar metal ring 53 closest to the enclosure 52. Pad 2 and pressure plate 4 are sealed together. Pad 2 seals the internal chamber 51 of the enclosure 52. By gradually increasing the air pressure inside chamber 51 using hydraulic pump 1, the explosion resistance of the ceramic arc-extinguishing chamber can be tested. This test process only requires fixing the positions of pad 2 and pressure plate 4, simplifying the process and significantly improving the efficiency of the explosion test. Furthermore, pad 2 and pressure plate 4 can be detachably connected, facilitating reuse of pad 2 and pressure plate 4 and reducing the test cost of the explosion test.

[0025] Please refer to Figure 1 and Figure 3 A first connecting hole 22 is aligned on the pad 2 and the pressure plate 4. A fastener 221 is installed in the first connecting hole 22. The fastener 221 passes through both the pad 2 and the pressure plate 4 along the first connecting hole 22 to fix the pad 2 and the pressure plate 4. In some embodiments, the first connecting hole 22 can be a threaded hole, and the fastener 221 can be a bolt to thread the pad 2 and the pressure plate 4. The threaded connection structure is stable and reliable, ensuring that the pad 2 and the pressure plate 4 are pressed tightly together, and guaranteeing the sealing performance between the pad 2 and the pressure plate 4. Moreover, the threaded connection structure is simple, easy to assemble and disassemble, and low in cost, effectively improving the efficiency of the explosion test and controlling the cost of the explosion test.

[0026] Preferably, four of the first connecting holes 22 are respectively opened on the pad 2 and the pressure plate 4 around the cover 52. That is, the pad 2 and the pressure plate 4 are connected simultaneously by multiple fasteners 221. While distributing the load, the multiple fasteners 221 also connect the pad 2 and the pressure plate 4 at multiple points, ensuring a tighter fit between the connecting pieces of the pad 2 and the pressure plate 4, and ensuring the sealing performance between the pad 2 and the pressure plate 4.

[0027] Please refer to Figure 1 and Figure 3 A sealing ring 3 is provided between the gasket 2 and the pressure plate 4. The sealing ring 3 fills the gap between the gasket 2 and the pressure plate 4, ensuring the sealing performance between the gasket 2 and the pressure plate 4. In some embodiments, the sealing ring 3 can be made of fluororubber, which can withstand air pressure and high temperatures below 200°C. This is suitable for the working conditions of the ceramic arc extinguishing chamber 5.

[0028] Preferably, a first sealing groove 21 is formed on the surface of the pad 2 near the cover 52. The sealing ring 3 is inserted into the first sealing groove 21. The sealing ring 3 protrudes from the surface of the pad 2 near the cover 52. A second sealing groove 41 is formed on the surface of the pressure plate 4 near the pad 2. After the pressure plate 4 and the pad 2 are attached, the sealing ring 3 is inserted into the second sealing groove 41. The first sealing groove 21 and the second sealing groove 41 cooperate to restrict the position of the sealing ring 3, preventing the sealing ring 3 from moving and affecting the sealing performance between the pad 4 and the pressure plate 4.

[0029] Please refer to Figure 1 and Figure 3 A second connecting hole 23 is provided on the pad 2. The hydraulic pump 1 passes through the pad 2 along the second connecting hole 23 to connect to the chamber 51. A connector 11 is provided on the pad 2. The connector 11 connects both the hydraulic pump 1 and the second connecting hole 23. Taking the hydraulic pump 1 as a commercially available Parker P1 series variable displacement piston pump as an example, the second connecting hole 23 can be a threaded hole, and the connector 11 can be a commercially available SAE J514 standard connector 11.

[0030] Preferably, the hydraulic pump 1 is equipped with a hydraulic gauge 12, which can monitor the pressure inside the chamber 51 in real time. During the explosion test, the hydraulic pump 1 first continuously increases the pressure inside the chamber 51 until the ceramic arc-extinguishing shield 5 ruptures, at which point the air pressure inside the chamber 51 drops. During this process, the highest air pressure displayed by the pressure gauge is the ultimate pressure resistance value of the ceramic arc-extinguishing shield 5.

[0031] The specific workflow of this utility model is as follows: Connector 11 connects to the second connecting hole 23, connecting the hydraulic pump 1 and connector 11. Insert the sealing ring 3 into the first sealing groove 21, and move the pad 2 to the opening end 521 of the cover 52, so that the sealing ring 3 contacts the Kovar metal ring 53. Sleeve the pressure plate 4 onto the cover 52, ensuring it contacts both the pressure plate 4 and the pad 2. Then connect the pad 2 and the pressure plate 4 using fasteners 221. Place the entire ceramic arc-extinguishing cover 5 in water. Uniformly increase the pressure inside the chamber 51 using the hydraulic pump 1 until hydraulic oil appears in the water, at which point stop the hydraulic pump 1. The maximum pressure value recorded by the hydraulic gauge 12 during this process is the ultimate pressure resistance value of the ceramic arc-extinguishing cover 5. The explosion test of the ceramic arc-extinguishing cover 5 is completed.

[0032] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-voltage DC relay ceramic component charging and explosion testing device, configured in conjunction with a ceramic arc-extinguishing hood; the ceramic arc-extinguishing hood includes a hood body and a Kovar metal ring disposed at the open end of the hood body, characterized in that, The high-voltage DC relay ceramic component explosion test device includes: A pad is provided at the opening end of the cover; A pressure plate is fitted onto the cover. A hydraulic pump is connected to the pad; the hydraulic pump passes through the pad and then connects to the internal chamber of the cover. The pad contacts the Kovar metal ring; the pad is located on the side of the Kovar metal ring away from the cover; the pressure plate contacts the Kovar metal ring; the pressure plate is located on the side of the Kovar metal ring closer to the cover; the pad and the pressure plate are sealed together.

2. The high-voltage DC relay ceramic component charging and explosion test device as described in claim 1, characterized in that: A sealing ring is provided between the pad and the pressure plate.

3. The high-voltage DC relay ceramic component charging and explosion test device as described in claim 2, characterized in that: The pad has a first sealing groove on its surface near the cover; the sealing ring is inserted into the first sealing groove; the sealing ring is near the surface of the cover and protrudes from the pad near the surface of the cover.

4. The high-voltage DC relay ceramic component charging and explosion test device as described in claim 3, characterized in that: A second sealing groove is formed on the surface of the pressure plate near the pad; after the pressure plate and the pad are attached, the sealing ring is inserted into the second sealing groove.

5. The high-voltage DC relay ceramic component charging and explosion test device as described in claim 1, characterized in that: The pad and the pressure plate are aligned and have a first connecting hole; a fastener is provided in the first connecting hole; the fastener passes through both the pad and the pressure plate along the first connecting hole to fix the pad and the pressure plate.

6. The high-voltage DC relay ceramic component charging and explosion test device as described in claim 5, characterized in that: Four of the first connecting holes are respectively opened on the pad and the pressure plate around the cover.

7. The high-voltage DC relay ceramic component charging and explosion test device as described in claim 1, characterized in that: A second connection hole is provided on the pad; the hydraulic pump passes through the pad along the second connection hole to connect to the chamber.

8. The high-voltage DC relay ceramic component charging and explosion test device as described in claim 7, characterized in that: A connector is provided on the pad; the connector connects the hydraulic pump and the second connecting hole.

9. The high-voltage DC relay ceramic component charging and explosion test device as described in claim 1, characterized in that: A hydraulic gauge is installed on the hydraulic pump.

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