CN218447701U

CN218447701U - Hidden vacuum arc-extinguishing chamber for conducting rod load switch

Info

Publication number: CN218447701U
Application number: CN202222926250.0U
Authority: CN
Inventors: 陈益飞
Original assignee: 777 Electric Technology Co ltd
Current assignee: 777 Electric Technology Co ltd
Priority date: 2022-11-03
Filing date: 2022-11-03
Publication date: 2023-02-03
Anticipated expiration: 2032-11-03

Abstract

The utility model discloses a hidden vacuum interrupter for conducting rod load switch, this hidden vacuum interrupter for conducting rod load switch include the casing, the inside shield cover that is equipped with of casing, be equipped with movable contact and stationary contact in the shield cover, movable contact one end and stationary contact one end contact, movable contact one end is equipped with moves the conducting rod, it is equipped with the anti-twist screw to move conducting rod one end, the terminal surface that moves the conducting rod sets up to flushing with the anti-twist screw terminal surface, the anti-twist screw sets up in the uide bushing, it is whole hidden inside the casing to move the conducting rod, it is equipped with the tray to move the conducting rod, the tray links together bellows shield cover, bellows, movable cover plate through the welding, it is equipped with the uide bushing to move the conducting rod, the uide bushing is installed in movable cover plate, movable cover plate installs in the casing draw-in groove, stationary contact one end is equipped with the stationary contact. The utility model has the advantages of the product is high-quality, the installation is convenient, the product is small.

Description

Hidden vacuum arc-extinguishing chamber for conducting rod load switch

Technical Field

The utility model belongs to the technical field of the vacuum interrupter, specifically be a hidden vacuum interrupter for conducting rod load switch.

Background

The vacuum arc extinguish chamber, also known as a vacuum switch tube, is a core component of a medium-high voltage power switch, has the main functions of rapidly extinguishing arc and inhibiting current after a medium-high voltage circuit is cut off a power supply through excellent vacuum insulativity in the tube, avoids accidents and accidents, is mainly applied to a power transmission and distribution control system of electric power, and is also applied to power distribution systems of metallurgy, mines, petroleum, chemical engineering, railways, broadcasting, communication, industrial high-frequency heating and the like. The vacuum arc-extinguishing chamber is divided into an arc-extinguishing chamber for a circuit breaker and an arc-extinguishing chamber for a load switch from the aspect of application, the arc-extinguishing chamber for the circuit breaker is mainly used for substations and power grid facilities in the power sector, and the arc-extinguishing chamber for the load switch is mainly used for end users of a power grid.

Disclosure of Invention

The utility model discloses an in order to overcome above-mentioned vacuum interrupter prior art weak point for the load switch, provide a high-quality, the convenient, the small product of installation of arc extinguishing ability.

In order to solve the problem, the utility model adopts the following technical proposal.

The hidden vacuum arc extinguish chamber for the conducting rod load switch comprises a shell, wherein a shielding cover is arranged inside the shell, a movable contact and a static contact are arranged in the shielding cover, one end of the movable contact is in contact with one end of the static contact, one end of the movable contact is provided with a movable conducting rod, one end of the movable conducting rod is provided with an anti-torsion screw, the end face of the movable conducting rod is flush with the end face of the anti-torsion screw, the anti-torsion screw is arranged on a guide sleeve, the movable conducting rod is integrally hidden inside the shell and provided with a tray, the tray connects a corrugated pipe shielding cover, a corrugated pipe and a movable cover plate together through welding, the movable conducting rod is provided with a guide sleeve, the guide sleeve is installed on the movable cover plate, the movable cover plate is installed on a clamping groove of the shell, one end of the static contact is provided with a static conducting rod, one ends of the static conducting rod and the movable conducting rod are both provided with a detachable structure, one end of the static conducting rod is provided with the anti-torsion screw, the static conducting rod is provided with a static cover plate, and the static cover plate is installed on the clamping groove of the shell.

Preferably, the fixed contact is provided with a fixed contact spiral groove, the fixed contact and the fixed conducting rod are integrally formed, the movable contact is provided with a movable contact spiral groove, and the movable contact and the movable conducting rod are integrally formed.

Preferably, the blind hole is formed in one end of the movable conducting rod, the blind hole is provided with a movable rod internal thread, the movable rod internal thread can be connected with the connecting device, the blind hole is formed in one end of the static conducting rod, the blind hole is provided with a static rod internal thread, and the static rod internal thread can be connected with the connecting device.

Preferably, quiet apron is equipped with quiet apron recess, prevent turning round the screw setting at quiet apron recess, the uide bushing is equipped with the uide bushing recess, prevent turning round the screw setting at the uide bushing recess, the uide bushing center is established to the through-hole, move conducting rod one end and pass the uide bushing through-hole.

Preferably, the bottom edge of the guide sleeve is provided with a protruding part, the movable cover plate is provided with a movable cover plate groove, the center of the movable cover plate is provided with a through hole, and the protruding part is installed in the movable cover plate groove.

Preferably, the center of the corrugated pipe is provided with a through hole, and the diameter of the through hole of the corrugated pipe is larger than that of the movable conducting rod.

Has the advantages that:

compared with the prior art, the beneficial effects of the utility model are that:

(1) The utility model discloses, through the structure of improvement movable contact and stationary contact, design contact surface is the helicla flute, belongs to one kind of horizontal magnetic field contact, compares in cylindrical contact on the market, and general breaking capacity is no longer than 7-8kA, and this design can improve the arc extinguishing ability, and the short circuit closes the electric current and can bear 20-25kA, and arc current divides constantly along the helicla flute and moves with high speed to avoid the serious melting on contact surface, can resume insulating strength rapidly after the electric current zero passage.

(2) The utility model discloses, move conducting rod and quiet conducting rod one end and all be equipped with the anti-torque screw, this design prevents when installation connecting device, because of the pipe wall is smooth, the unable fixed pipe wall of spanner or the slip that leads to in the installation after fixed leads to, make the inside gas leakage of vacuum interrupter that makes of messenger conducting rod and quiet conducting rod rotation, and simultaneously, this design all is equipped with the recess at uide bushing and quiet apron, prevents the stability of turning round when further strengthening the conducting rod installation, and simultaneously, it all is equipped with the internal thread to move conducting rod and quiet conducting rod, improves its installation convenience.

(3) The utility model discloses, move conducting rod integral erection inside the casing, compare in drawing of traditional vacuum interrupter for load switch and move conducting rod, this design greatly reduced whole area is applicable to the higher equipment of space requirement.

Drawings

Fig. 1 is a schematic structural view of a vacuum interrupter for a concealed conducting rod load switch according to the present invention;

fig. 2 is a schematic side view of the vacuum interrupter for the hidden conducting rod load switch according to the present invention;

fig. 3 is an enlarged schematic view of a planing surface detail a of the vacuum interrupter for the hidden conducting rod load switch of the present invention;

fig. 4 is an enlarged schematic view of a planing surface detail B of the vacuum interrupter for the hidden conducting rod load switch of the present invention;

fig. 5 is a schematic view illustrating an installation of a vacuum interrupter for a concealed conducting rod load switch according to the present invention;

the corresponding relationship between the reference numbers of the figures and the names of the components in the figures is as follows:

reference numerals: 1. a housing; 2. a guide sleeve; 3. a bellows; 4. a movable cover plate; 5. a bellows shield; 6. a movable conductive rod; 7. a shield case; 8. a static conductive rod; 9. a static cover plate; 10. a moving contact; 11. static contact; 12. anti-twist screws; 13. a connecting device;

1.1, a clamping groove;

21. a raised portion; 22. a guide sleeve groove;

41. a movable cover plate groove;

61. a tray; 62. moving rod internal threads;

81. a stationary bar internal thread;

91. a static cover plate groove;

101. a moving point spiral groove;

111. a dead point spiral groove.

Detailed Description

In the prior art, as shown in fig. 1-5, the utility model provides a hidden vacuum interrupter for conducting rod load switch through setting up to the helicla flute to sound contact, realizes improving arc extinguishing ability, moves conducting rod one end and installs the screw of preventing turning round, moves conducting rod integral erection inside the casing, prevents turning round the screw and install in the recess, moves conducting rod one end and is equipped with the internal screw thread design, realizes installing convenient and small purpose to it damages the function of inside gas leakage to have the installation to prevent incidentally, it is right below the utility model discloses do further description.

Examples

A hidden vacuum arc extinguish chamber for a conducting rod load switch comprises a shell 1.1, wherein the shell 1.1 is made of ceramic, a shielding cover 7 is arranged inside the shell 1.1, a movable contact 10 and a fixed contact 11 are arranged in the shielding cover 7, one end of the movable contact 10 is in contact with one end of the fixed contact 11, a movable contact spiral groove 101 is formed in the surface of the movable contact 10, the movable contact 10 and a movable conducting rod 6 are integrally formed, a corrugated pipe 3, a corrugated pipe shielding cover 5, a movable cover plate 4 and the movable conducting rod 6 are connected in a welding mode, the corrugated pipe 3 is made of stainless steel, the corrugated pipe shielding cover 5 can be made of stainless steel or oxygen-free copper, and the hidden vacuum arc extinguish chamber mainly has the function of absorbing a large amount of metal steam and liquid drop splashing generated by the contact in an arc burning process and absorbing a part of electric arc energy.

The guide sleeve 2 is made of insulating materials, mainly plays a role in guiding, ensures that the movable conducting rod 6 does linear motion along the axis of the vacuum arc extinguish chamber in the opening and closing motion process, and simultaneously can prevent the current of a conducting loop from being shunted to the corrugated pipe 3 to influence the service life of the vacuum arc extinguish chamber. Be equipped with the uide bushing recess 22 that corresponds anti-twist screw 12 on the uide bushing 2, anti-twist screw 12 and the laminating of uide bushing recess 22, anti-twist screw 12 can be connected with moving conducting rod 6 and quiet conducting rod 8, it all is equipped with the internal thread to move conducting rod 6 and quiet conducting rod 8, connecting device 13 accessible makes it to be connected with moving pole internal thread 62 and quiet pole internal thread 81, the installation convenience is improved, because it is whole to move conducting rod 6 to hide in the casing, the operating device that the optional volume is littleer connects, overall space is saved.

The initial state of the contact of the vacuum arc-extinguishing chamber is closed, when an abnormal condition occurs in the circuit, the operating mechanism receives an instruction, pulls the movable conducting rod 6 of the vacuum arc-extinguishing chamber for the load switch, the movable conducting rod 6 is connected with the connecting device 13 through the internal thread 82, the movable contact 10 at one end of the movable conducting rod is separated from the fixed contact 11, at the moment of separating the movable contact and the fixed contact, the current shrinks to a certain point or a plurality of points just separated from the contact, the specific characteristics are that the resistance between the electrodes is increased violently and the temperature is increased rapidly until the evaporation of electrode metal occurs, and simultaneously, an extremely high electric field height is formed, so that violent field emission and gap breakdown are caused, at the moment, vacuum electric arcs are generated, the vacuum arcs are not maintained by the ionization of gas molecules between the electrodes, but are maintained by metal steam formed by the evaporation of contact materials, the movable contact 10 and the fixed contact 11 both adopt spiral grooves, arc current is conducted through the spiral grooves, so that the serious melting of the contact surfaces of the contacts is avoided, the corrugated pipe shielding cover 5 blocks a large amount of metal steam and liquid drops generated in the arc burning process, the inner wall of the insulating shell is polluted, energy of the insulating shell is absorbed, the energy of a condensed part of the corrugated pipe, the electric arc is generated, the electric arc current is changed into a safe electric conductor 3, and the leakage of the corrugated pipe is prevented from being burned metal conductors after the leakage is changed into a leakage, and the leakage of the electric arc, and the metal conductor is prevented from being burned metal leakage for a long time, and the leakage of the corrugated pipe, and the leakage of the electric arc is prevented from being broken contact.

The above description is for further details of the present invention, and it is not assumed that the embodiments of the present invention are limited to these descriptions, and it is obvious to those skilled in the art that the present invention can be implemented by a plurality of simple deductions or replacements without departing from the concept of the present invention, and all should be considered as belonging to the protection scope defined by the claims submitted by the present invention.

Claims

1. The hidden vacuum arc extinguish chamber for the conducting rod load switch is characterized by comprising a shell (1), wherein a shielding cover (7) is arranged inside the shell (1), a movable contact (10) and a fixed contact (11) are arranged in the shielding cover (7), one end of the movable contact (10) is in contact with one end of the fixed contact (11), one end of the movable contact (10) is provided with a movable conducting rod (6), one end of the movable conducting rod (6) is provided with a torsion-proof screw (12), the end face of the movable conducting rod (6) is arranged to be flush with the end face of the torsion-proof screw (12), the torsion-proof screw (12) is arranged on a guide sleeve (2), the movable conducting rod (6) is integrally hidden inside the shell (1), the movable conducting rod (6) is provided with a tray (61), the tray (61) connects a corrugated pipe shielding cover (5), a corrugated pipe (3) and the movable cover plate (4) together by welding, the movable conducting rod (6) is provided with a guide sleeve (2), the guide sleeve (2) is arranged on the movable cover plate (4), the movable cover plate (4) is arranged on the shell (1), one end of the movable conducting rod (8) is arranged on the movable conducting rod (8), and one end of the static conducting rod (8) is arranged on the movable conducting rod, the static conducting rod (8) is provided with a static cover plate (9), and the static cover plate (9) is installed on the shell clamping groove (1.1).

2. The concealed conducting rod vacuum interrupter for a load switch according to claim 1, wherein: the movable contact is characterized in that the fixed contact (11) is provided with a fixed contact spiral groove (111), the fixed contact (11) and the fixed conducting rod (8) are integrally formed, the movable contact (10) is provided with a movable contact spiral groove (101), and the movable contact (10) and the movable conducting rod (6) are integrally formed.

3. The concealed conducting rod load switch vacuum interrupter according to claim 2, wherein: move conducting rod (6) one end and be equipped with the blind hole, the blind hole is equipped with moves pole internal thread (62), move pole internal thread (62) and can link to each other with connecting device (13), quiet conducting rod (8) one end is equipped with the blind hole, the blind hole is equipped with quiet pole internal thread (81), quiet pole internal thread (81) can link to each other with connecting device (13).

4. The concealed conducting rod load switch vacuum interrupter according to claim 1, wherein: quiet apron (9) are equipped with quiet apron recess (91), prevent turning round screw (12) and set up at quiet apron recess (91), uide bushing (2) are equipped with uide bushing recess (22), prevent turning round screw (12) and set up at uide bushing recess (22), the through-hole is established at uide bushing (2) center, move conducting rod (6) one end and pass uide bushing (2) through-hole.

5. The concealed conducting rod load switch vacuum interrupter according to claim 4, wherein: the edge of the bottom of the guide sleeve (2) is provided with a protruding part (21), the movable cover plate (4) is provided with a movable cover plate groove (41), the center of the movable cover plate (4) is provided with a through hole, and the protruding part (21) is installed in the movable cover plate groove (41).

6. The concealed conducting rod load switch vacuum interrupter according to claim 1, wherein: the center of the corrugated pipe (3) is provided with a through hole, and the diameter of the through hole of the corrugated pipe (3) is larger than that of the movable conducting rod (6).