Electric contact structure of arc extinguish chamber

Abstract

The utility model relates to the technical field of arc extinguish chambers, in particular to a structure of an electric contact of an arc extinguish chamber, which comprises a contact assembly used for contacting, an arc extinguish assembly used for arc extinguish and the arc extinguish chamber used for installing the contact assembly and the arc extinguish assembly, an installation cylinder is arranged in the arc extinguish chamber, a shielding cylinder is arranged in the installation cylinder, and the shielding cylinder is arranged in the shielding cylinder. Through grooves with the same size are formed in the corresponding positions of the two sides of the mounting cylinder and the shielding cylinder, by means of the shielding cylinder, when the movable contact and the static contact are separated, generated electric arcs are heated and compressed in the shielding cylinder, airflow is generated through the through grooves in the two sides of the shielding cylinder and the mounting cylinder and discharged at a high speed, and the arc blowing effect on the electric arcs is achieved. And the electric arc is blown into the arc extinguishing grid sheets through the through grooves, so that the arc extinguishing operation is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to arc-extinguishing chamber technical field, and specifically is a kind of arc-extinguishing chamber electric contact structure. BACKGROUND

[0002] The existing circuit breaker includes a moving contact and a stationary contact. For an air circuit breaker applied to a large-current circuit, an arc is generated at the moment when the moving contact and the stationary contact are disconnected. If the arc is not eliminated in time, an explosion or a fire may be caused.

[0003] According to the search, the utility model with publication number CN212461511U discloses an electric contact and a vacuum arc-extinguishing chamber, and relates to the technical field of high-voltage vacuum switches. The electric contact includes a static contact and a moving contact. Both the static contact and the moving contact include a contact seat, a main contact, and an auxiliary arc contact. A path groove is formed on the contact seat at a preset angle in the circumferential direction, and the path grooves on the contact seats of the static contact and the moving contact are in the same direction. The main contact is disc-shaped. The main contact and the auxiliary arc contact are arranged on the same side of the contact seat, and the auxiliary arc contact is located outside the main contact. When the main contacts of the static contact and the moving contact are closed, the auxiliary arc contacts of the static contact and the moving contact are gap-matched.

[0004] The electric contact provided by the above-mentioned electric contact and vacuum arc-extinguishing chamber can transfer the arc from the main contact to the auxiliary arc contact when the main contact is electrically separated, thereby reducing the ablation of the surface of the main contact, further improving the arc-ablation resistance of the vacuum arc-extinguishing chamber, ensuring the current-carrying capacity, and improving the electrical life. However, in the above-mentioned technology, the point contact of the device is in contact for a long time, and the arc-ablation resistance cannot achieve good arc-extinguishing effect. The arc-ablation may cause high temperature and reduce the service life of the main contact.

[0005] In view of the above, we provide an arc-extinguishing chamber electric contact structure. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide an arc-extinguishing chamber electric contact structure to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] An arc-extinguishing chamber electric contact structure includes:

[0009] A contact assembly for contact and an arc-extinguishing assembly for arc-extinguishing, and an arc-extinguishing chamber for mounting the contact assembly and the arc-extinguishing assembly;

[0010] The inside of the arc-extinguishing chamber is provided with a mounting cylinder, the inside of the mounting cylinder is provided with a shielding cylinder, and the mounting cylinder and the shielding cylinder are provided with through grooves of the same size at positions corresponding to both sides.

[0011] Preferably, the contact assembly comprises a static contact and a dynamic contact, the inside of the shielding cylinder is provided with the dynamic contact, and the bottom of the dynamic contact is provided with a dynamic contact point.

[0012] Preferably, the top of the dynamic contact is fixedly connected with a dynamic conducting rod, the outer side of the dynamic conducting rod is sleeved with a limiting spring, and the two ends of the limiting spring are fixedly connected with the mounting cylinder and the dynamic conducting rod.

[0013] Preferably, the bottom end of the dynamic contact is provided with two static contacts, the top end of the two static contacts is fixedly connected with a static contact point, the bottom end of the two static contacts is fixedly connected with the arc extinguishing chamber through bolts, and the static contact is in a shape of''.

[0014] Preferably, the arc extinguishing assembly comprises arc extinguishing fins, and the outside of the mounting cylinder is symmetrically provided with a plurality of mounting plates on the two sides, and the inside of the mounting plate is provided with the arc extinguishing fins.

[0015] The working principle and beneficial effects of the utility model are as follows:

[0016] The utility model discloses a double dynamic contact and double static contact are used to share arc energy, when the dynamic contact and the static contact are separated, the double dynamic contact and the double static contact installed on the double dynamic contact and the static contact realize contact and separation, arc energy is relatively reduced, the ablation effect on the double dynamic contact and the double static contact is reduced, and arc extinguishing operation is facilitated.

[0017] The utility model discloses a shielding cylinder is arranged, when the dynamic contact and the static contact are separated, the arc generated in the shielding cylinder is heated and compressed, passes through the through slot on the two sides of the shielding cylinder and the mounting cylinder and is discharged at high speed to achieve the blowing arc effect on the arc, and the arc is blown into the arc extinguishing fin through the through slot to realize arc extinguishing operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is internal structure schematic diagram of the utility model;

[0019] Figure 2 It is external structure schematic diagram of the utility model;

[0020] Figure 3 It is arc extinguishing fin structure schematic diagram of the utility model;

[0021] Figure 4 It is mounting cylinder external structure schematic diagram of the utility model;

[0022] Figure 5 It is mounting cylinder half cut structure schematic diagram of the utility model.

[0023] In the drawing:

[0024] 1, arc chamber; 2, mounting cylinder; 3, mounting plate; 4, arc extinguishing grid; 5, through slot; 6, shielding cylinder; 7, moving conducting rod; 8, limiting spring; 9, moving contact; 10, moving contact point; 11, stationary contact; 12, stationary contact point; 13, bolt. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] As shown in Figures 1-5 , a structure of an arc chamber electric contact includes:

[0027] A contact assembly for contact and an arc extinguishing assembly for arc extinguishing and an arc chamber 1 for mounting the contact assembly and the arc extinguishing assembly;

[0028] The arc chamber 1 is internally provided with a mounting cylinder 2, the mounting cylinder 2 is internally provided with a shielding cylinder 6, and the mounting cylinder 2 is provided with through slots 5 of the same size corresponding to the positions on both sides of the shielding cylinder 6.

[0029] As shown in Figure 1 and Figure 2 , the contact assembly includes stationary contacts 11 and moving contacts 9, the inside of the shielding cylinder 6 is provided with the moving contacts 9, and the bottom of the moving contacts 9 is provided with moving contact points 10;

[0030] The top of the moving contacts 9 is fixedly connected with a moving conducting rod 7, the outside of the moving conducting rod 7 is sleeved with a limiting spring 8, and the two ends of the limiting spring 8 are fixedly connected with the mounting cylinder 2 and the moving conducting rod 7 respectively;

[0031] The bottom end of the moving contacts 9 is provided with two stationary contacts 11, the top end of the two stationary contacts 11 is fixedly connected with stationary contact points 12, and the bottom end of the two stationary contacts 11 is fixedly connected with the arc chamber 1 through a bolt 13, and the stationary contacts 11 are in the shape of “”.

[0032] In the embodiment, the double moving contact points 10 and the double stationary contact points 12 share the arc energy, so that when the moving contacts 9 and the stationary contacts 11 are separated, the arc energy is shared by the moving contact points 10 and the stationary contact points 12 on both sides, which is relatively reduced, thereby facilitating better arc extinguishing operation.

[0033] As shown in Figure 3 and Figure 5 , the arc extinguishing assembly includes arc extinguishing grid 4, and the outside of the mounting cylinder 2 is symmetrically provided with a plurality of mounting plates 3, and the inside of the mounting plate 3 is provided with the arc extinguishing grid 4.

[0034] When the moving contact 9 and the static contact 11 are separated in the embodiment, the electric arc generated is heated in the shielding cylinder 6 and is compressed to generate airflow to be discharged at high speed through the through slot 5 on both sides of the shielding cylinder 6 and the mounting cylinder 2, so that the blowing arc effect on the electric arc is achieved, and the electric arc is blown into the arc extinguishing grid 4 through the through slot 5, thereby realizing high-efficiency arc extinguishing operation.

[0035] In summary, the working principle is as follows:

[0036] For the structure of the arc chamber electric contact, first, the arc extinguishing grid 4 is arranged outside the through slot 5 through the mounting plate 3 arranged outside the mounting cylinder 2;

[0037] Secondly, when the moving conductive rod 7 pushes the moving contact 9 and the static contact 11 to contact, the moving conductive rod 7 pulls down the limiting spring 8, and when the moving contact 9 and the static contact 11 are separated, the limiting spring 8 drives the moving contact 10 and the static contact 12 to separate, and the moving contact 9 is quickly and stably separated;

[0038] Then, the electric arc energy is shared by the double moving contact 10 and the double static contact 12, so that when the moving contact 9 and the static contact 11 are separated, the electric arc energy is shared on the moving contact 10 and the static contact 12 on both sides, and the electric arc energy is relatively reduced;

[0039] Finally, after the moving contact 9 and the static contact 11 are separated, the electric arc generated is heated in the shielding cylinder 6 and is compressed to generate airflow to be discharged at high speed through the through slot 5 on both sides of the shielding cylinder 6 and the mounting cylinder 2, so that the blowing arc effect on the electric arc is achieved, and the electric arc is blown into the arc extinguishing grid 4 through the through slot 5, thereby realizing high-efficiency arc extinguishing operation.

[0040] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A structure of an electric contact of an arc extinguishing chamber, characterized by, Include: The contact assembly for contact and the arc extinguishing assembly for arc extinguishing and the arc extinguishing chamber (1) for installing the contact assembly and the arc extinguishing assembly; The inside of the arc extinguishing chamber (1) is provided with a mounting cylinder (2), the inside of the mounting cylinder (2) is provided with a shielding cylinder (6), the mounting cylinder (2) and the shielding cylinder (6) are provided with the same size through slot (5) on both sides.

2. An arc chute electrical contact structure as defined in claim 1, wherein: The contact assembly includes a static contact (11) and a moving contact (9), the inside of the shielding cylinder (6) is provided with a moving contact (9), the bottom of the moving contact (9) is provided with a moving contact (10).

3. An arc chute electrical contact structure according to claim 2, wherein: The top of the moving contact (9) is fixedly connected with a moving conducting rod (7), the outer side of the moving conducting rod (7) is sleeved with a limiting spring (8), the two ends of the limiting spring (8) are respectively fixedly connected with the mounting cylinder (2) and the moving conducting rod (7).

4. An arc chute electrical contact structure as defined in claim 2, wherein: The bottom of the moving contact (9) is provided with two static contacts (11), the top of the two static contacts (11) is fixedly connected with a static contact (12), the bottom of the two static contacts (11) is fixedly connected with the arc extinguishing chamber (1) through a bolt (13), and the static contact (11) is in the shape of " ".

5. The structure of an electric contact of an arc extinguishing chamber according to claim 1, characterized in that: The arc extinguishing assembly includes an arc extinguishing grid (4), the outside of the mounting cylinder (2) is symmetrically provided with a plurality of mounting plates (3), and the inside of the mounting plate (3) is provided with an arc extinguishing grid (4).

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