Withstand voltage test tool for ceramic insulating plate

Abstract

The utility model relates to the technical field of test tools, in particular to a withstand voltage test tool for a ceramic insulating plate. In order to solve the problems that a thinnest insulating substrate is required to complete a relatively high withstand voltage test and the withstand voltage of most of areas needs to be measured as much as possible, the utility model provides the following technical scheme: the device comprises a negative electrode insulating block, and a positive electrode insulating block is arranged above the negative electrode insulating block; grooves are formed in the opposite sides of the negative insulation block and the positive insulation block, mounting grooves are further formed in the grooves, and sealing rings are mounted in the mounting grooves formed in the side faces of the negative insulation block and the positive insulation block. The negative conductive electrode is mounted in the negative insulation block; and a negative lead-out port is formed in the center of the negative insulation block. According to the utility model, a withstand voltage test can be carried out on a small-sized insulating substrate, the problem that the withstand voltage test is influenced by the increase of a creepage distance can be well solved by using the tool, and the tool is convenient to use and safer.

Description

Technical Field

[0001] The utility model relates to the technical field of testing tooling, in particular to a pressure-resistant testing tooling for a ceramic insulating plate. Background Art

[0002] Generally, when performing a withstand voltage test on a traditional insulating substrate, a small conductor is used, or one side is closely attached to the insulating substrate and connected to the negative pole of the withstand voltage tester, while the other side is closely attached to the insulating substrate and connected to the positive pole of the withstand voltage tester. This allows the withstand voltage test of the insulating substrate to be performed. However, this method can only roughly determine the withstand voltage value of the insulating substrate, and cannot completely or overwhelmingly measure the ultimate withstand voltage of the insulating substrate. This is because the higher the withstand voltage value to be measured, the higher the electrical gap and creepage distance between the positive and negative electrodes of the withstand voltage tester need to be. Insulating substrates often require high thermal conductivity and high withstand voltage. However, the thermal conductivity of an insulating substrate is inversely proportional to the thickness of the insulating substrate, while the withstand voltage of an insulating substrate is directly proportional to the thickness of the ceramic substrate. These two factors constitute a technical contradiction. Therefore, it is desirable to use the thinnest insulating substrate to complete a higher withstand voltage test, and it is necessary to measure the withstand voltage of the vast majority of the area as much as possible. In view of this, the present invention proposes a withstand voltage test fixture for a ceramic insulating board. Utility Model Content

[0003] The purpose of the utility model is to address the problem in the background technology that a high withstand voltage test needs to be completed with the thinnest insulating substrate and the withstand voltage of the vast majority of areas needs to be measured as much as possible, and to propose a withstand voltage test tool for ceramic insulating plates.

[0004] The technical solution of the utility model is as follows: a withstand voltage test tool for a ceramic insulating plate, comprising a negative insulating block, a positive insulating block is arranged above the negative insulating block, a groove is provided on the side opposite to the positive insulating block, a mounting groove is further provided in the groove, and a sealing ring is installed in the mounting groove provided on the side of the negative insulating block and the positive insulating block; a negative conductive electrode is installed in the negative insulating block, a negative lead-out port is provided at the center of the negative insulating block, the negative conductive electrode is arranged in the negative lead-out port, a negative conductive sponge is pasted in the groove on the side of the negative insulating block, and the negative conductive sponge is The negative conductive electrode fits tightly; the positive conductive electrode is installed in the positive insulating block, a positive lead-out port is opened at the center of the positive insulating block, the positive conductive electrode is arranged in the positive lead-out port, a positive conductive sponge is pasted in the groove on the side of the positive insulating block, and the positive conductive sponge fits tightly with the positive conductive electrode; an insulating substrate is arranged between the negative conductive sponge and the positive conductive sponge, and a withstand voltage test is performed on the insulating substrate after the negative conductive electrode and the positive conductive electrode are energized; a limiting mechanism is installed on both sides of the negative insulating block and the positive insulating block, and the limiting mechanism is used to limit the positive insulating block when it approaches or moves away from the negative insulating block.

[0005] Optionally, multiple groups of threaded holes are provided at the edge of the negative electrode insulating block, and multiple groups of stepped holes are provided at the edge of the positive electrode insulating block. Bolts are provided through the stepped holes, and one end of the bolt is threadedly connected to the threaded hole.

[0006] Optionally, the depth of the groove is half the thickness of the insulating substrate.

[0007] Optionally, insulating silicone is applied around the sealing ring.

[0008] Optionally, the highest point of the sealing ring installed on the negative electrode insulating block is 1 mm to 2 mm higher than the upper surface of the negative electrode conductive sponge, and the lowest point of the sealing ring installed on the positive electrode insulating block is 1 mm to 2 mm lower than the lower surface of the positive electrode conductive sponge.

[0009] Optionally, the limiting mechanism includes two groups of fixed blocks respectively fixedly connected to the two sides of the negative insulating block, multiple groups of limiting rods are fixedly connected to the top of the fixed blocks, the tops of the multiple groups of limiting rods are commonly fixedly connected to a top plate, and sliders are slidably connected to the multiple groups of limiting rods on the same side of the negative insulating block, and the two groups of sliders are respectively fixedly connected to the two sides of the positive insulating block.

[0010] Optionally, a group of the sliders are slidably connected with a positioning block, the positioning block is in contact with the limiting rod, the side of the slider is threadedly connected with a knob, and the knob is rotatably connected to the positioning block.

[0011] In summary, this application includes at least one of the following beneficial technical effects:

[0012] The utility model provides a negative conductive electrode, a negative conductive sponge, a positive conductive electrode, and a positive conductive sponge. When the positive insulating block is fixed on the negative insulating block by bolts, the sealing ring effectively isolates the creepage path between the positive and negative electrodes, thereby preventing the creepage distance from becoming longer as the voltage increases, and facilitating the withstand voltage test of a small insulating substrate.

[0013] Furthermore, by setting the limiting mechanism, when the positive insulating block is away from the negative insulating block, the positioning block can be pressed against the limiting rod by turning the knob, so that the positive insulating block is fixed at a high position, which facilitates the taking and placing operation of the insulating substrate. At the same time, the positive insulating block can be accurately positioned when installed on the negative insulating block, without the need for additional positioning operation, and the operation is simple.

[0014] In summary, the utility model can perform a withstand voltage test on a small insulating substrate. The use of this tool can effectively solve the problem of increased creepage distance affecting the withstand voltage test, and it is easy to use and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A schematic structural diagram of a dielectric withstand voltage test fixture for ceramic insulating plates is provided;

[0016] Figure 2 for Figure 1 Exploded diagram;

[0017] Figure 3 for Figure 2 A magnified schematic diagram of point A in the middle;

[0018] Figure 4 Schematic top view of the negative electrode insulating block;

[0019] Figure 5 Schematic diagram of the cross-sectional structure of the tooling.

[0020] Reference numerals:

[0021] 1. Negative electrode insulation block; 11. Negative electrode outlet; 12. Threaded hole;

[0022] 2. Positive electrode insulating block; 21. Positive electrode lead-out port; 22. Stepped hole; 121. Groove; 122. Mounting slot; 123. Bolt;

[0023] 3. Negative conductive electrode; 4. Negative conductive sponge; 5. Positive conductive electrode; 6. Positive conductive sponge; 7. Insulating substrate;

[0024] 8. Limiting mechanism; 81. Fixing block; 82. Limiting rod; 83. Top plate; 84. Slider; 85. Positioning block; 86. Knob;

[0025] 9. Sealing ring. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0027] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0028] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] like Figures 1 to 5 As shown, the present invention proposes a dielectric withstand test fixture for a ceramic insulating plate, comprising a negative insulating block 1, with a positive insulating block 2 disposed above the negative insulating block 1. A groove 121 is defined on the opposite side of the negative insulating block 1 and the positive insulating block 2. The depth of the groove 121 is half the thickness of the insulating substrate 7, enabling the positive insulating block 2 and the negative insulating block 1 to be bonded together and thereby clamp the insulating substrate 7. A mounting slot 122 is also defined within the groove 121 to facilitate securing the sealing ring 9. Eight groups of threaded holes 12 are provided at the edge of the negative insulating block 1, and eight groups of stepped holes 22 are provided at the edge of the positive insulating block 2. Bolts 123 are provided through the stepped holes 22, and one end of the bolt 123 is threadedly connected to the threaded hole 12, so that the positive insulating block 2 can be fixed to the side of the negative insulating block 1 through the bolt 123, and at the same time, the sealing ring 9 and the insulating substrate 7 can be tightly fitted together, thereby effectively isolating the creepage path between the positive and negative electrodes, so that the withstand voltage test will not be unable to be carried out due to the creepage of the positive and negative electrodes during higher withstand voltage tests.

[0032] Specifically, the above-mentioned test fixture includes a negative conductive electrode 3 installed in the negative insulating block 1, a negative electrode outlet 11 is provided at the center of the negative insulating block 1, and the negative conductive electrode 3 is arranged in the negative electrode outlet 11. A negative conductive sponge 4 is pasted and arranged in a groove 121 on the side of the negative insulating block 1. The negative conductive sponge 4 is tightly fitted with the negative conductive electrode 3, and the negative conductive sponge 4 is energized through the negative conductive electrode 3. A positive conductive electrode 5 is installed in the positive insulating block 2, a positive electrode outlet 21 is provided at the center of the positive insulating block 2, and the positive conductive electrode 5 is arranged in the positive electrode outlet 21. A positive conductive sponge 6 is pasted and arranged in a groove 121 on the side of the positive insulating block 2, and the positive conductive sponge 6 is tightly fitted with the positive conductive electrode 5. The positive conductive sponge 6 is energized through the positive conductive electrode 5. Sealing rings 9 are installed in the mounting grooves 122 provided on the sides of the negative insulating block 1 and the positive insulating block 2, and the sealing rings 9 are coated with insulating silicone around them to improve the insulation isolation effect. The highest point of the sealing ring 9 installed on the negative electrode insulating block 1 is 1 mm higher than the upper surface of the negative electrode conductive sponge 4, and the lowest point of the sealing ring 9 installed on the positive electrode insulating block 2 is 1 mm lower than the lower surface of the positive electrode conductive sponge 6, which can ensure that the sealing ring 9 is squeezed, thereby improving the electrical characteristics between the electrodes.

[0033] Furthermore, the test fixture further includes an insulating substrate 7 disposed between the negative conductive sponge 4 and the positive conductive sponge 6 , and a withstand voltage test is performed on the insulating substrate 7 after the negative conductive electrode 3 and the positive conductive electrode 5 are energized.

[0034] The limiting mechanism 8 is installed on both sides of the negative insulating block 1 and the positive insulating block 2. The limiting mechanism 8 is used to limit the positive insulating block 2 when it approaches or moves away from the negative insulating block 1. The limiting mechanism 8 includes two sets of fixed blocks 81 respectively fixedly connected to both sides of the negative insulating block 1. The position of the fixed blocks 81 is fixed. Two sets of limiting rods 82 are fixedly connected to the top of the fixed blocks 81. The tops of the two sets of limiting rods 82 are commonly fixedly connected to a top plate 83. The top plate 83 is used to prevent the slider 84 from detaching from the limiting rod 82. Sliders 84 are slidably connected to the two sets of limiting rods 82 on the same side of the negative insulating block 1. The two sets of sliders 84 are respectively fixedly connected to both sides of the positive insulating block 2. The positive insulating block 2 moves smoothly under the limiting action of the limiting rods 82 and the sliders 84. The positive insulating block 2 directly slides close to the negative insulating block 1 and is accurately positioned. A group of sliders 84 are slidably connected with a positioning block 85, and the positioning block 85 contacts the limit rod 82. The side of the slider 84 is threadedly connected with a knob 86, and the knob 86 is rotatably connected to the positioning block 85. When the knob 86 rotates, it drives the positioning block 85 to slide closer to or away from the limit rod 82, so as to fix the positive insulating block 2 at a high place away from the negative insulating block 1, so as to facilitate the taking and placing of the insulating substrate 7.

[0035] The operating principle of this embodiment is as follows: First, the positive insulating block 2 is moved to a higher position. Under the restraining action of the stop rods 82 and slider 84, the positive insulating block 2 moves smoothly away from the negative insulating block 1. When the slider 84 contacts the top plate 83, the knob 86 is rotated, causing the positioning block 85 to slide within the slider 84, simultaneously squeezing the stop rods 82. The positive insulating block 2 is now fixed between the multiple sets of stop rods 82. The insulating substrate 7 can now be placed in the groove 121 on the negative insulating block 1. The knob 86 is rotated to move the positioning block 85 away from the stop rods 82. This allows the positive insulating block 2 to approach the negative insulating block 1 under the restraining action of the stop rods 82 and slider 84. The positive insulating block 2 can then be secured to the top of the negative insulating block 1 using bolts 123, squeezing the two sets of sealing rings 9. At this point, power is applied to the negative and positive conductive electrodes 3 and 5, allowing the insulating substrate 7 to undergo a withstand voltage test.

[0036] The above specific embodiment is only an optional embodiment of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above embodiment, those skilled in the art can make various alternative improvements and combinations to the above specific embodiment.

Claims

1. A pressure test tool for ceramic insulating boards, characterized in that: include: A negative electrode insulating block (1), a positive electrode insulating block (2) is arranged above the negative electrode insulating block (1), a groove (121) is provided on a side of the negative electrode insulating block (1) opposite to the positive electrode insulating block (2), a mounting groove (122) is further provided in the groove (121), and a sealing ring (9) is installed in the mounting groove (122) provided on the side of the negative electrode insulating block (1) and the positive electrode insulating block (2); A negative conductive electrode (3) is installed in the negative insulating block (1), a negative electrode outlet (11) is provided at the center of the negative insulating block (1), the negative conductive electrode (3) is arranged in the negative electrode outlet (11), a negative conductive sponge (4) is pasted in a groove (121) on the side of the negative insulating block (1), and the negative conductive sponge (4) is tightly fitted to the negative conductive electrode (3); A positive electrode (5) is installed in the positive insulating block (2), a positive electrode outlet (21) is provided at the center of the positive insulating block (2), the positive electrode (5) is arranged in the positive electrode outlet (21), a positive conductive sponge (6) is pasted in a groove (121) on the side of the positive insulating block (2), and the positive conductive sponge (6) is tightly fitted with the positive electrode (5); An insulating substrate (7) is disposed between the negative conductive sponge (4) and the positive conductive sponge (6), wherein a withstand voltage test is performed on the insulating substrate (7) after the negative conductive electrode (3) and the positive conductive electrode (5) are energized; A limiting mechanism (8) is installed on both sides of the negative insulating block (1) and the positive insulating block (2), and the limiting mechanism (8) is used to limit the positive insulating block (2) when it approaches or moves away from the negative insulating block (1).

2. The withstand voltage test fixture for ceramic insulating boards according to claim 1, characterized in that: The edge of the negative electrode insulating block (1) is provided with a plurality of threaded holes (12), and the edge of the positive electrode insulating block (2) is provided with a plurality of stepped holes (22). Bolts (123) are provided through the stepped holes (22), and one end of the bolt (123) is threadedly connected to the threaded hole (12).

3. The withstand voltage test fixture for ceramic insulating boards according to claim 1, characterized in that: The depth of the groove (121) is half the thickness of the insulating substrate (7).

4. The withstand voltage test fixture for ceramic insulating boards according to claim 1, characterized in that: The sealing ring (9) is coated with insulating silica gel around its periphery.

5. The withstand voltage test fixture for ceramic insulating boards according to claim 1, characterized in that: The highest point of the surface of the sealing ring (9) installed on the negative electrode insulating block (1) is 1 mm to 2 mm higher than the upper surface of the negative electrode conductive sponge (4), and the lowest point of the surface of the sealing ring (9) installed on the positive electrode insulating block (2) is 1 mm to 2 mm lower than the lower surface of the positive electrode conductive sponge (6).

6. The withstand voltage test fixture for ceramic insulating boards according to claim 1, characterized in that: The limiting mechanism (8) comprises two groups of fixed blocks (81) respectively fixedly connected to both sides of the negative electrode insulating block (1); the tops of the fixed blocks (81) are fixedly connected to multiple groups of limiting rods (82); the tops of the multiple groups of limiting rods (82) are commonly fixedly connected to a top plate (83); the multiple groups of limiting rods (82) on the same side of the negative electrode insulating block (1) are slidably connected to sliders (84); the two groups of sliders (84) are respectively fixedly connected to both sides of the positive electrode insulating block (2).

7. The withstand voltage test fixture for ceramic insulating boards according to claim 6, characterized in that: A group of the sliders (84) are slidably connected with a positioning block (85), the positioning block (85) contacts the limiting rod (82), and the side of the slider (84) is threadedly connected with a knob (86), and the knob (86) is rotatably connected to the positioning block (85).

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