CN107808797B

CN107808797B - Outdoor combined solid-sealed polar pole

Info

Publication number: CN107808797B
Application number: CN201710833130.7A
Authority: CN
Inventors: 胡光福; 沈忠威; 王世孝; 常秀文
Original assignee: NINGBO SHUNLI HIGH VOLTAGE SWITCHGEAR TECHNOLOGY CO LTD
Current assignee: Ningbo jianrun electromechanical Co.,Ltd.
Priority date: 2017-09-15
Filing date: 2017-09-15
Publication date: 2020-04-17
Anticipated expiration: 2037-09-15
Also published as: CN107808797A

Abstract

The invention relates to an outdoor combined type solid-sealed polar pole, which is designed for solving the technical problems of poor structural design and poor pouring production process of the existing like products. The wire inlet seat and the wire outlet seat of the outdoor combined type solid-sealed polar pole are respectively arranged at the top of the shell and are in a V shape; the main points are that the parts such as the wire inlet seat, the wire outlet seat and the like are fixed on a first mould, epoxy resin is injected on the mould, and a shell of the first layer of epoxy resin is formed by pouring; the prepared shell is fixed on a second die, silicon rubber is injected, and a silicon rubber layer of the shell outer diameter of epoxy resin is poured; the flexible connection, the insulating pull rod and the vacuum arc extinguish chamber are combined to form a circuit breaker, then the moving contact and the insulating screw rod are combined and assembled, and the moving contact is assembled to move linearly by shaking the insulating screw rod, so that the three-station switch is formed. The contact fingers are arranged in the wire inlet seat, the conductive seat and the grounding seat, the moving contact and the insulating lead screw form a moving conductive rod, and the insulating lead screw is connected with the moving contact in the wire inlet cavity.

Description

Outdoor combined solid-sealed polar pole

Technical Field

The invention relates to an outdoor solid-sealed polar pole of a high-voltage switch, which is an outdoor combined solid-sealed polar pole.

Background

The solid-sealed pole embeds the vacuum arc-extinguishing chamber and the related conductive parts of the circuit breaker into easily solidified solid insulating materials such as epoxy resin or thermoplastic materials to form the pole, so that the whole pole of the circuit breaker becomes an integral part, and the pouring in the production process is an important link in the production process. As disclosed in chinese patent document, application No. 201220490775.8, publication No. 2013.03.27, and utility model entitled "embedded pole for outdoor vacuum circuit breaker"; the solid-sealed polar pole comprises a shell, an upper wiring terminal and a lower wiring terminal, wherein an arc extinguish chamber, an insulating rod and a movable conducting rod are arranged in the shell, the movable conducting rod is connected with the insulating rod, a flexible connection is arranged on the movable conducting rod, a conducting block is fixed on the shell, the flexible connection is fixed on the conducting block through a bolt, and the lower wiring terminal is fixed on the conducting block; the flexible connection is connected with the lower wiring terminal through the conductive block, and the flexible connection can be well fixed on the conductive block, so that the conductivity of the product is ensured. However, the structural inlet and outlet lines of the similar products are positioned in the same chamber, so that the sealing effect is poor, and the similar products are difficult to be used in high-altitude areas; meanwhile, the casting production and the internal structure in the production process of the similar products need to be further improved, so that the internal sealing and the use in high-altitude areas can be ensured.

Disclosure of Invention

In order to overcome the defects, the invention aims to provide an outdoor combined type solid-sealed polar pole, which is designed aiming at the technical problems of poor structural design and poor pouring production process of the outdoor combined type solid-sealed polar pole in the existing domestic high-voltage switch industry and aims to realize the technical scheme.

An outdoor combined type solid-sealed polar pole is characterized in that a vacuum arc extinguish chamber, a grounding seat, an insulating pull rod, a flexible connection and a movable conducting rod are arranged in a shell of the outdoor combined type solid-sealed polar pole, and the shell is respectively provided with a wire inlet seat and a wire outlet seat; the structure design key points are that a wire inlet cavity and a wire outlet cavity are respectively arranged on two sides in the shell, the shells of the wire inlet cavity and the wire outlet cavity are respectively provided with a wire inlet seat and a wire outlet seat, the wire inlet seat and the wire outlet seat respectively extend out of the shell, a vacuum arc-extinguishing chamber is arranged in the wire outlet cavity of the shell, the vacuum arc-extinguishing chamber extends out of a sealing plate at the bottom of the shell through an insulating pull rod, the joint of the insulating pull rod and the vacuum arc-extinguishing chamber is connected with the inner wall of the wire outlet cavity through flexible connection, and the wire inlet; the inlet wire intracavity of casing is equipped with conductive seat and moving contact, the accent casing department in inlet wire chamber is equipped with the earthing bracket, conductive seat and the moving contact in the inlet wire intracavity stretch out the earthing bracket through insulating lead screw to and the closing plate of casing bottom, the seat of being qualified for the next round of competitions in the intracavity passes through CT and lead-out wire, PT and lead-out wire stretch out the casing, be equipped with in the inlet wire seat, conductive seat, the earthing bracket and touch the finger, the movable conducting rod is constituteed with insulating lead screw to above-mentioned moving contact and insulating lead screw, insulating lead screw is connected with the moving contact in the inlet wire. The lead-in cavity and the lead-out cavity of the shell are completely separated, the cavity in the shell is sealed through the sealing plate, and the lead-in seat, the lead-out seat CT and the lead-out wire, the capacitor and the lead-out wire, the PT and the lead-out wire, the insulating pull rod and the insulating lead screw are sealed and extend out of the shell.

The wire inlet seat and the wire outlet seat of the shell are respectively arranged at the top of the shell and are symmetrically bent outwards to form a V shape. The structure is convenient for the external connection of the wire inlet seat and the wire outlet seat, and the short circuit of the circuit is not easy to occur.

The outer diameter of the shell is wrapped by a silicon rubber layer, the outer diameter of the upper part of the base of the shell, and the silicon rubber layers of the outer diameters of the wire inlet seat and the wire outlet seat are corrugated silicon rubber layers. The above structure prevents the housing from colliding and reduces the collision force.

The insulating wire rod of closing plate stretches out the hole and is equipped with bearing and sealing washer, and the insulating pull rod of closing plate stretches out the hole and is equipped with clamp and sealing washer. The structure further ensures the sealing and normal work of the insulating screw rod and the insulating pull rod.

A cross-shaped connecting piece is arranged in the vacuum arc extinguish chamber, and two ends of the connecting piece are respectively connected with the wire inlet seat and the insulating pull rod. The structure is convenient for the assembly and the connection between the insulating pull rod and the vacuum arc extinguish chamber.

And the connecting piece between the vacuum arc extinguish chamber and the wire outlet seat is connected with the CT and the outgoing wire, and the PT and the outgoing wire. The arrangement of the CT, the lead-out wire, the PT and the lead-out wire during casing pouring is convenient.

The one end of insulating pull rod is the stock, the one end lock of stock and connector, and the connector external diameter of lock department is equipped with outer hexagonal, and the other end of connector is outer ripple chamber, is equipped with the changeover portion between outer ripple chamber and the outer hexagonal, is equipped with criss-cross sealing joint in the open-top in outer ripple chamber, and insulating pull rod passes through criss-cross sealing joint and is connected with the connecting piece in the vacuum arc extinguishing chamber. The structure is convenient for the assembly and the production of the insulating pull rod and the normal work of the insulating pull rod in the shell wire outlet cavity.

According to the structural characteristics, the manufacturing process of the pouring process of the solid-sealed polar pole specifically comprises the following steps: firstly, fixing a wire inlet seat, a wire outlet seat, a CT (current transformer), a lead-out wire, a vacuum arc extinguish chamber, a capacitor, a lead-out wire, a conductive seat, a PT (potential transformer), a lead-out wire, a grounding seat and a fixing threaded sleeve on a first die, then injecting epoxy resin on the die, and pouring to form a shell of epoxy resin of a first layer; fixing the prepared shell on a second mold, then injecting silicon rubber, and pouring a silicon rubber layer of the outer diameter of the shell of epoxy resin; then, the flexible connection, the insulating pull rod and the vacuum arc extinguish chamber are combined to form a circuit breaker, the moving contact and the insulating screw rod are combined and assembled, and the moving contact is assembled to move linearly by shaking the insulating screw rod to form a three-station switch; and finally, installing a sealing plate at the bottom of the shell, and fixing the sealing plate on a fixed threaded sleeve of the shell to completely seal the interior of the solid-sealed polar pole. Therefore, parts in the solid-sealed polar pole are assembled in the sealed shell in a working mode, and the internal working environment and the external environment are completely isolated in actual use, so that the solid-sealed polar pole is suitable for high-altitude areas.

The inner walls of the wire inlet cavities at the upper end and the lower end of the conductive seat form inner corrugated sections. The structure ensures that the moving contact moves in a buffering way at the upper end and the lower end of the inlet wire cavity of the shell.

The invention has reasonable structural design, convenient assembly and installation, good sealing effect and stable working state; the composite pole is mainly used as an outdoor combined type solid-sealed pole, particularly used in high-altitude areas, and used for improving the structure of similar products.

Drawings

FIG. 1 is a schematic view of the pre-cast structure of the present invention.

FIG. 2 is a sectional view of the first casting according to the present invention.

Fig. 3 is a schematic perspective view of fig. 2.

Fig. 4 is a schematic sectional structure view of the silicone rubber of fig. 3 after casting.

Fig. 5 is a schematic view of the fitting assembly structure of fig. 4.

Fig. 6 is a cross-sectional structural view after assembly of fig. 5.

Figure number and name: 1. the device comprises a wire inlet seat, a wire outlet seat, a vacuum arc-extinguishing chamber, a wire outlet seat, a capacitor, a wire outlet, a conductive seat, a wire outlet seat, a grounding seat, a fixed screw sleeve, a shell, an insulating pull rod, a movable contact, a movable.

Detailed Description

The construction and use of the invention will now be further described with reference to the accompanying drawings. As shown in fig. 1-6, a vacuum arc-extinguishing chamber 4, a grounding seat 8, an insulating pull rod 11, a flexible connection 15, a movable contact 12 and an insulating screw 13 are arranged in a casing 10 of the outdoor combined type solid-sealed pole, the casing is respectively provided with a wire inlet seat 1 and a wire outlet seat 2, and the wire inlet seat and the wire outlet seat are respectively arranged at the top of the casing and are symmetrically bent outwards to form a V shape. The outer diameter of the shell is wrapped by a silicon rubber layer, the outer diameter of the upper part of the base of the shell, and the silicon rubber layers of the outer diameters of the wire inlet seat and the wire outlet seat are corrugated silicon rubber layers. The two sides in the shell are respectively provided with a wire inlet cavity and a wire outlet cavity, the shells of the wire inlet cavity and the wire outlet cavity are respectively provided with a wire inlet seat and a wire outlet seat, and the wire inlet seat and the wire outlet seat respectively extend out of the shell. The wire outlet cavity of the shell is internally provided with a vacuum arc-extinguishing chamber, the vacuum arc-extinguishing chamber extends out of a sealing plate 14 at the bottom of the shell through an insulating pull rod, the joint of the insulating pull rod and the vacuum arc-extinguishing chamber is connected with the inner wall of the wire inlet cavity through a flexible connection, and a wire inlet seat in the wire inlet cavity extends out of the shell through a capacitor and a lead-out wire 5. The inlet wire intracavity of casing is equipped with conductive seat 6 and moving contact 12, and the accent casing department in inlet wire chamber is equipped with the earthing stand, and conductive seat and the moving contact in the inlet wire intracavity stretch out the earthing stand through insulating lead screw to and the closing plate of casing bottom, the insulating lead screw of closing plate stretches out the hole and is equipped with bearing and sealing washer, and the insulating pull rod of closing plate stretches out the hole and is equipped with clamp and sealing washer. The wire outlet seat in the wire outlet cavity extends out of the shell through the CT, the

lead wires

3 and 7, the contact fingers are arranged in the wire inlet seat, the conductive seat and the grounding seat, the insulating screw rod is connected with the movable contact in the wire inlet cavity, and the insulating screw rod is arranged opposite to the wire inlet seat in the shell.

Meanwhile, a cross-shaped connecting piece is arranged in the vacuum arc extinguish chamber, and two ends of the connecting piece are respectively connected with the wire inlet seat and the insulating pull rod; and a connecting piece between the vacuum arc extinguish chamber and the wire outlet seat is connected with the CT and the outgoing wire, and the PT and the outgoing wire. The one end of insulating pull rod is the stock, the one end lock of stock and connector, and the connector external diameter of lock department is equipped with outer hexagonal, and the other end of connector is outer ripple chamber, is equipped with the changeover portion between outer ripple chamber and the outer hexagonal, is equipped with criss-cross sealing joint in the open-top in outer ripple chamber, and insulating pull rod passes through criss-cross sealing joint and is connected with the connecting piece in the vacuum interrupter chamber.

The invention solves the difficulties of the prior art that: 1. electric field analysis and improvement during design; 2. and controlling a pouring process during manufacturing. The solid-sealed polar pole is characterized in that: the primary part is to fixedly seal the isolating switch, the grounding switch and the circuit breaker; the secondary part is to seal the measurement, protection and operation power supply and the primary part simultaneously; the environment range applicable to the fully sealed solid-sealed polar pole is wider and is irrelevant to the height of the sea level; after the full-sealed bird nest-making device is fully sealed, accidental short circuit faults caused by bird nest-making are avoided.

The manufacturing process of the outdoor combined type solid-sealed polar pole is as follows: 1. as shown in fig. 1, fixing the parts (outlet seat, inlet seat, CP and outlet, capacitor and outlet, vacuum interrupter, PT and outlet, conductive seat, grounding seat, fixing screw sleeve) on the mold, and injecting epoxy resin to mold into the shape shown in fig. 2 and 3; 2. as shown in fig. 2 and fig. 3, the post after being sealed is fixed on a mold, and then injected into a silicone rubber casting device to be sealed into the shape as shown in fig. 4, i.e. the housing as shown in fig. 5; 3. as shown in fig. 5, the flexible connection, the insulating pull rod and the vacuum arc-extinguishing chamber are combined to form a circuit breaker, and then the moving contact assembly is combined with the screw rod; then, the moving contact is assembled to move linearly by shaking the insulating screw rod to form a three-position switch; 4. and a sealing plate is arranged for assembly, as shown in fig. 6, so that the interior of the solid-sealed polar pole is completely sealed, the solid-sealed polar pole works in an assembly environment, and the solid-sealed polar pole is irrelevant to a working environment in actual use and is suitable for high-altitude areas.

Claims

1. An outdoor combined type solid-sealed polar pole is characterized in that a vacuum arc extinguish chamber (4), a grounding seat (8), an insulating pull rod (11), a flexible connection (15) and a movable conducting rod are arranged in a shell (10) of the outdoor combined type solid-sealed polar pole, and the shell is respectively provided with a wire inlet seat (1) and a wire outlet seat (2); the vacuum arc extinguishing chamber is characterized in that a wire inlet cavity and a wire outlet cavity are respectively arranged on two sides in a shell (10), the shells of the wire inlet cavity and the wire outlet cavity are respectively provided with a wire inlet seat (1) and a wire outlet seat (2), the wire inlet seat and the wire outlet seat respectively extend out of the shell, a vacuum arc extinguishing chamber (4) is arranged in the wire outlet cavity of the shell, the vacuum arc extinguishing chamber extends out of a sealing plate (14) at the bottom of the shell through an insulating pull rod (11), the joint of the insulating pull rod and the vacuum arc extinguishing chamber is connected with the inner wall of the wire outlet cavity through a flexible connection (15), and the wire inlet seat in the wire; a conductive seat (6) and a movable contact (12) are arranged in a wire inlet cavity of the shell, a grounding seat (8) is arranged at the cavity opening of the wire inlet cavity, the conductive seat and the movable contact in the wire inlet cavity extend out of the grounding seat through an insulating screw rod (13), and a sealing plate is arranged at the bottom of the shell; the wire inlet seat (1) and the wire outlet seat (2) of the shell (10) are respectively arranged at the top of the shell and symmetrically bent outwards to form a V shape; the inner walls of the wire inlet cavities at the upper end and the lower end of the conductive seat (6) form inner corrugated sections; the outer diameter of the shell (10) is wrapped by a silicon rubber layer, the outer diameter of the upper part of the base of the shell, and the silicon rubber layers of the outer diameters of the wire inlet seat (1) and the wire outlet seat (2) are corrugated silicon rubber layers; firstly, fixing a wire inlet seat (1), a wire outlet seat (2), a CT and outgoing wire (3), a vacuum arc-extinguishing chamber (4), a capacitor and outgoing wire (5), a conductive seat (6), a PT and outgoing wire (7), a grounding seat (8) and a fixed threaded sleeve (9) on a first die, then injecting epoxy resin on the die, and pouring to form a shell of epoxy resin of a first layer; fixing the prepared shell on a second mold, then injecting silicon rubber, and pouring a silicon rubber layer of the outer diameter of the shell of epoxy resin; then, the flexible connection (15), the insulating pull rod (11) and the vacuum arc-extinguishing chamber are combined to form a circuit breaker, the moving contact (12) and the insulating screw rod (13) are combined and assembled, and the moving contact is assembled to move linearly by shaking the insulating screw rod to form a three-station switch; finally, a sealing plate (14) is arranged at the bottom of the shell and fixed on a fixed threaded sleeve of the shell, so that the interior of the solid-sealed polar pole is completely sealed; a bearing and a sealing ring are arranged in a hole, extending out of an insulating screw rod (13) of the sealing plate (14), and a clamp and a sealing ring are arranged in a hole, extending out of an insulating pull rod (11) of the sealing plate; a cross-shaped connecting piece is arranged in the vacuum arc extinguish chamber (4), and two ends of the connecting piece are respectively connected with the wire inlet seat (1) and the insulating pull rod (11); the connecting piece between the vacuum arc extinguish chamber (4) and the wire outlet seat (2) is connected with the CT, the outgoing wire (3), the PT and the outgoing wire (7); the one end of insulating pull rod (11) is the stock, the stock with the one end lock of connector, the connector external diameter of lock department is equipped with outer hexagonal, the other end of connector is outer ripple chamber, is equipped with the changeover portion between outer ripple chamber and the outer hexagonal, is equipped with criss-cross sealing joint in the open-top in outer ripple chamber, the insulating pull rod passes through criss-cross sealing joint and is connected with the connecting piece in vacuum interrupter (4).