High-voltage component structure of voltage divider

Abstract

The utility model relates to the technical field of voltage dividers, and provides a voltage divider high-voltage component structure, which comprises a high-voltage rod, a high-voltage joint, a waterproof joint, a resistance plate and a silica gel high-voltage wire. And a rubber sealing ring and an anti-bending nut are arranged between the high-pressure joint and the waterproof joint to form sealing. And the end part of the resistance plate is provided with a semicircular hole which is clamped with the cross-shaped clamping groove of the high-voltage connector, and is provided with a small hole for welding a high-voltage outgoing line. One end of the silica gel high-voltage wire is connected to the resistance plate small hole, and the other end passes through the high-voltage joint and the waterproof joint and is bonded with the high-voltage joint. And a cover plate is arranged at the tail end of the high-voltage rod and is bonded with the resistance plate and the high-voltage rod through sealing silica gel to realize sealing. According to the structure, through independent safety insulation design and sealing dustproof treatment, the sealing dustproof problem of a high-voltage part of a traditional voltage divider is solved, and the reliability and convenience of the voltage divider are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage dividers, in particular to a high-voltage component structure of a voltage divider. Background Art

[0002] The 2kV-20kV high-voltage divider commonly seen on the market needs to connect a voltage-dividing resistor to the high-voltage input circuit to reduce the voltage to a lower range, and then output a low-voltage signal after processing. The high-voltage part includes high-voltage wires and resistor plates, which need to be isolated from the surrounding low-voltage parts including the casing in accordance with relevant safety requirements to ensure a certain electrical clearance and creepage distance, thereby ensuring personal safety and avoiding damage to the instrument. This safe electrical clearance and creepage distance are closely related to the pollution level. In order to reduce pollution and avoid condensation, the high-voltage part of the voltage divider is generally designed to be sealed and dustproof.

[0003] The common structure at present is to seal and dustproof the voltage divider housing to isolate the voltage divider from the external environment. This mainly has the following problems:

[0004] First, the voltage divider shell is required to be integrated, with good rigidity and not easy to deform, which results in thick shell wall and heavy weight;

[0005] Second, it is necessary to seal multiple interfaces such as the power socket, power switch, grounding screw, high-voltage input hole and signal output socket, which is troublesome and prone to leaks;

[0006] Third, the cost of structural parts is high;

[0007] Fourth, the internal operating space is small, which is not conducive to assembly production. Utility Model Content

[0008] In order to solve the problems existing in the background technology, the utility model provides a high-voltage component structure of a voltage divider, which includes a high-voltage rod and a high-voltage connector, a waterproof connector, a resistor plate and a silicone high-voltage wire installed inside the high-voltage rod, wherein: the high-voltage connector is plugged into the waterproof connector, a rubber sealing ring is installed between the high-voltage connector and the waterproof connector, and an anti-bending nut is installed on the outside of the sealing ring; a cross groove is opened at the end of the high-voltage connector, and the resistor plate is connected to the cross groove.

[0009] The resistor plate is provided with a small hole, and a high-voltage lead-out wire is provided at one end of the silicone high-voltage wire, which is connected and welded to the small hole of the resistor plate; the other end of the silicone high-voltage wire passes through a high-voltage connector and a waterproof connector, and a cavity between the silicone high-voltage wire and the high-voltage connector is filled with potting silicone, so that the silicone high-voltage wire and the high-voltage connector are bonded together; a cover plate is provided at the end of the high-voltage rod, and a long hole is provided on the cover plate; the end of the resistor plate is inserted into the long hole, and sealing silicone is injected at the long hole, so that the cover plate, the resistor plate and the high-voltage rod are sealed and bonded.

[0010] In a preferred solution, the front and rear parts of the waterproof joint are respectively provided with an external thread part 1 for connecting the anti-bending nut and an external thread part 2 for connecting the high-voltage rod, and the external thread part 1 and the external thread part 2 are coated with silicone for preventing loosening.

[0011] In a preferred solution, the high-voltage rod is provided with chamfered edges, external threads and stepped necking, which are used to install the high-voltage rod on the structural member of the voltage divider.

[0012] In a preferred solution, a semicircular hole is provided at the end of the resistor plate for clamping with the cross clamping slot of the high-voltage connector.

[0013] The beneficial effects achieved by the utility model are:

[0014] The utility model separates the high-voltage input line and the resistor plate from the structure, and makes a high-voltage component together with the anti-bending joint, and independently performs safety insulation design and sealing and dustproof treatment, which not only effectively solves the problem of sealing and dustproofing of the high-voltage part of the voltage divider, ensures personal safety and avoids damage to the instrument, improves the reliability of the voltage divider, but also avoids the problems of poor portability and great processing difficulty caused by the bulky casing, and at the same time provides more favorable possibilities for the structural design of the voltage divider, and can realize that the front panel and the rear panel can be installed independently, greatly simplifying the internal assembly operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a half-section structural diagram of the utility model;

[0016] Figure 2 It is a cross-sectional structural diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the high-voltage connector, waterproof connector, anti-bending nut and resistor plate structure.

[0018] In the figure:

[0019] 1. Silicone high-voltage wire; 1-1. High-voltage lead-out wire; 2. Anti-bending nut; 3. Rubber sealing ring; 4. Waterproof connector; 4-1. External thread part one; 4-2. External thread part two; 5. High-voltage connector; 5-1. Cross groove; 6. Potting silicone; 7. High-voltage rod; 8. Resistor board; 8-1. Semicircular hole; 8-2. Small hole; 9. Cover plate; 9-1. Long hole; 10. Sealing silicone. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative, and the utility model is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0021] Reference Figure 1-Figure 3 The utility model separates the silicone high-voltage wire 1 and the resistor plate 8 carrying high-voltage signals from the structure, and makes them into high-voltage components together with other structural parts, and independently performs safety insulation design and sealing and dustproof treatment.

[0022] The utility model discloses a high-voltage component structure of a voltage divider, which comprises a high-voltage rod 7 and a high-voltage connector 5 installed inside the high-voltage rod 7, a waterproof connector 4, a resistor plate 8 and a silicone high-voltage line 1, wherein the high-voltage connector 5 is plugged into the waterproof connector 4, a rubber sealing ring 3 is installed between the high-voltage connector 5 and the waterproof connector 4, and an anti-bending nut 2 is installed outside the sealing ring.

[0023] A cross slot 5 - 1 is provided at the end of the high-voltage connector 5 , and the resistor plate 8 is connected to the cross slot 5 - 1 ; a semicircular hole 8 - 1 is provided at the end of the resistor plate 8 for clamping with the cross slot of the high-voltage connector 5 .

[0024] The resistor plate 8 is provided with a small hole 8-2, and a high-voltage lead-out wire 1-1 is provided at one end of the silicone high-voltage wire 1, and the high-voltage lead-out wire 1-1 is connected and welded to the small hole 8-2 of the resistor plate 8; the other end of the silicone high-voltage wire 1 passes through the high-voltage connector 5 and the waterproof connector 4, and the cavity between the silicone high-voltage wire 1 and the high-voltage connector 5 is filled with potting silicone 6, so that the silicone high-voltage wire 1 and the high-voltage connector 5 are bonded into one.

[0025] The end of the high-voltage rod 7 is provided with a cover plate 9, which is provided with a long hole 9-1; the end of the resistor plate 8 is inserted into the long hole 9-1, and the long hole 9-1 is filled with sealing silicone 10, so that the cover plate 9 is sealed and bonded with the resistor plate 8 and the high-voltage rod 7. The front and rear parts of the waterproof joint 4 are respectively provided with an external thread part 4-1 for connecting the anti-bending nut 2 and an external thread part 4-2 for connecting the high-voltage rod 7, and the external thread part 4-1 and the external thread part 4-2 are coated with silicone for preventing loosening.

[0026] In addition, the high-voltage rod 7 is provided with chamfered edges, external threads and stepped necking, which are used to mount the high-voltage rod 7 on the structural parts of the voltage divider.

[0027] The assembly process of a voltage divider high-voltage component structure of the utility model is as follows:

[0028] according to Figure 1-Figure 3At the position shown, the silicone high-voltage wire 1 is inserted into the hole of the high-voltage connector 5, and the potting silicone 6 is injected. After curing, the silicone high-voltage wire 1 and the high-voltage connector 5 are firmly bonded together.

[0029] Install the waterproof joint 4, apply silicone to the outer thread 4-1 to prevent loosening; install the rubber sealing ring 3, install the anti-bending nut 2 and tighten it to deform the rubber sealing ring 3, thereby achieving the purpose of sealing.

[0030] Insert the welding end of the resistor plate 8 into the cross slot 5 - 1 of the high-voltage connector 5 , and weld the high-voltage lead-out wire 1 - 1 of the silicone high-voltage wire 1 to the hole of the resistor plate 8 .

[0031] Insert the assembled assembly into the cavity of the high-voltage rod 7; after applying sealing silicone on the second external threaded portion 4-2 of the waterproof connector 4, install it on the high-voltage rod 7 and tighten it to prevent loosening and seal.

[0032] A cover plate 9 is installed at the other end of the high-voltage rod 7, and a sealing silicone rubber 10 is injected at the position shown in the figure. After curing, the cover plate 9 is bonded together with the resistor plate 8 and the high-voltage rod 7 to achieve the sealing purpose.

[0033] The silicone high-voltage wire 1 of the utility model is usually more than three meters long, and is bonded to the high-voltage connector 5 at the end by potting silicone 6. The bonding strength of the cured silicone 6 and the silicone high-voltage wire 1 is relatively high, which effectively prevents the high-voltage wire 1 from coming out of the high-voltage connector 5. The high-voltage connector 5 is made of insulating material, and its length is related to the working voltage. According to the provisions of IEC61010-1:2001 on creepage distance, when the working voltage is 10000V, the pollution level is 1, and the creepage distance is greater than 40mm. At this time, the length of the high-voltage connector 5 is greater than 45mm.

[0034] The high-voltage end of the resistor plate 8 should be clamped into the cross clamping groove 5 - 1 of the high-voltage connector 5 , so that the resistor plate 8 can rotate as the waterproof connector 4 is tightened.

[0035] The high-voltage end of the resistor plate 8 is provided with a semicircular hole 8-1, which is used to make space when welding the high-voltage lead wire 1-1, so that the high-voltage end of the resistor plate 8 can be smoothly inserted into the cross slot 5-1 of the high-voltage connector 5; the small hole 8-2 is used to weld the high-voltage lead wire 1-1.

[0036] The cover plate 9 is provided with a long hole 9-1; the cover plate 9 is inserted into the end of the high-voltage rod 7, and the end of the resistor plate 8 is inserted into the long hole 9-1, thereby determining the position of the resistor plate 8 in the high-voltage rod 7. The cover plate 9 is provided with a sealing silica gel 10, which mainly plays a sealing role.

[0037] The small hole 8-3 at the end of the resistor plate 8 is used to weld the connection wire to other detection circuits. The high-voltage rod 7 is provided with a chamfered edge 7-1, an external thread 7-2 and a stepped neck 7-3, which are used to install the high-voltage rod 7 on the structural member inside the voltage divider.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A voltage divider high voltage component structure, characterized in that: It comprises a high-voltage rod (7), a high-voltage connector (5) installed inside the high-voltage rod (7), a waterproof connector (4), a resistor plate (8) and a silicone high-voltage wire (1), wherein: The high-pressure joint (5) is inserted into the waterproof joint (4), a rubber sealing ring (3) is installed between the high-pressure joint (5) and the waterproof joint (4), and an anti-bending nut (2) is installed on the outer side of the sealing ring; A cross slot (5-1) is provided at the end of the high-voltage connector (5), and the resistor plate (8) is connected to the cross slot (5-1); The resistor plate (8) is provided with a small hole (8-2); one end of the silicone high-voltage wire (1) is provided with a high-voltage lead-out wire (1-1); the high-voltage lead-out wire (1-1) is connected and welded to the small hole (8-2) of the resistor plate (8); the other end of the silicone high-voltage wire (1) passes through a high-voltage connector (5) and a waterproof connector (4); a cavity between the silicone high-voltage wire (1) and the high-voltage connector (5) is filled with potting silicone (6), so that the silicone high-voltage wire (1) and the high-voltage connector (5) are bonded together; A cover plate (9) is arranged at the end of the high-voltage rod (7), and a long hole (9-1) is opened in the cover plate (9); the end of the resistor plate (8) is inserted into the long hole (9-1), and a sealing silica gel (10) is injected into the long hole (9-1), so that the cover plate (9) is sealed and bonded with the resistor plate (8) and the high-voltage rod (7).

2. The voltage divider high voltage component structure according to claim 1, characterized in that: The front and rear parts of the waterproof joint (4) are respectively provided with an external threaded portion (4-1) for connecting to the anti-bending nut (2) and an external threaded portion (4-2) for connecting to the high-voltage rod (7), and the external threaded portion (4-1) and the external threaded portion (4-2) are coated with silicone for preventing loosening.

3. The voltage divider high voltage component structure according to claim 1, characterized in that: The high-voltage rod (7) is provided with a chamfered edge, an external thread and a stepped neck, which are used to install the high-voltage rod (7) on a structural member of a voltage divider.

4. The voltage divider high voltage component structure according to claim 1, characterized in that: A semicircular hole (8-1) is provided at the end of the resistor plate (8) for clamping with the cross clamping slot of the high-voltage connector (5).

Images