Arc quenching device for reinforcing contact to cut off high power of railway signal relay

Abstract

The utility model relates to an arc quenching device for cutting off high power through a reinforced contact of a railway signal relay. The arc quenching device comprises a railway signal relay outer cover (1), a fixing strip (2) and a contact unit (4), permanent magnetic steel N (5) and permanent magnetic steel S (6); the permanent magnet steel N (5) and the permanent magnet steel S (6) are distributed at the upper position and the lower position of the contact unit (4), and the arc extinguishing device is characterized by comprising an arc extinguishing chamber (3), the contact unit (4) is framed by the arc extinguishing chamber (3), and the central horizontal plane of the arc extinguishing chamber (3) coincides with a parting line formed by the permanent magnet steel N (5) and the permanent magnet steel S (6). According to the utility model, the flash barrier is removed on the basis of the reinforcing contact of the existing railway signal relay, the arc extinguishing chamber is designed and manufactured aiming at the existing structure, the cut-off power of the reinforcing contact is improved to three times under the same circuit using condition, the main body structure of the railway signal relay is not changed, the universality is strong, and the economic cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of arc extinguishing devices of reinforced contact cut-off high power, in particular to a kind of arc extinguishing devices of reinforced contact cut-off high power of railway signal relay. BACKGROUND

[0002] Railway signal relay is the core device of railway signal equipment, in railway signal automatic control and remote control system, with it can constitute logic circuit or as executive element, wherein the reliability of the contact unit cut-off load is particularly important.

[0003] The existing reinforced contact cut-off high power mode is realized by adopting permanent magnet arc blowing method, due to the limited internal space of relay, the arc extinguishing effect generated by using this method has achieved the optimal effect, but the arc extinguishing effect is very weak when cutting off reinforced contact high power load using this method, and in individual extreme cases, it cannot extinguish arc, leading to ablation of reinforced contact. Therefore, it is urgent to develop a suitable arc extinguishing method based on the existing railway signal relay reinforced contact structure to meet the demand of cutting off reinforced contact high power. SUMMARY

[0004] The utility model aims at providing a kind of relay reinforced contact arc extinguishing device that can guarantee the mechanical characteristics and electrical characteristics of relay and the stability of guaranteeing reinforced contact reliable cut-off high power load.

[0005] In order to solve the above problems, the technical scheme of the utility model is: a kind of arc extinguishing device of reinforced contact cut-off high power of railway signal relay, including railway signal relay cover, fixed strip, contact unit;Permanent magnet N, permanent magnet S;Permanent magnet N and permanent magnet S are distributed in the upper and lower positions of contact unit, characterized by: including an arc extinguishing chamber, the arc extinguishing chamber frames contact unit, the center horizontal plane of arc extinguishing chamber coincides with the division line formed by permanent magnet N and permanent magnet S, the arc extinguishing chamber includes arc extinguishing space, arc extinguishing baffle, arc extinguishing grid, there are arc extinguishing baffle and arc extinguishing grid in arc extinguishing space, the arc extinguishing baffle in arc extinguishing space is used to isolate the arc of left and right two groups of reinforced contact;Arc extinguishing grid is used to divide the arc of reinforced contact.

[0006] The arc extinguishing chamber includes guide slot, and the guide slot of the arc extinguishing chamber is connected by being inserted into the two fixed strips fixed on the inner side of the railway signal relay cover.

[0007] The two fixed strips are bonded on the left and right sides of the inner side of the cover with polyurethane adhesive, so that the plane formed by the left and right sides coincides with the above-mentioned division line.

[0008] The guide slot of the arc extinguishing chamber is coated with polyurethane adhesive, and the polyurethane adhesive is glued to the fixed strip in the cover.

[0009] The arc extinguishing chamber comprises an arc extinguishing chamber exhaust hole for exhausting smoke generated by the electric arc to balance the pressure inside and outside the arc extinguishing chamber.

[0010] The two fixing strips are fixed to the arc extinguishing chamber by polyurethane glue.

[0011] The arc extinguishing chamber is installed in the railway signal relay cover at a position 49mm away from the inner surface dimension L1 of the railway signal relay cover and 68.5mm away from the right inner surface dimension L2 of the railway signal relay cover.

[0012] The arc extinguishing chamber improves the arc extinguishing plate to the arc extinguishing chamber without changing the technical conditions of the existing contact unit, improves the cutting power of the reinforced contact point, and does not change the main structure of the railway signal relay, is universal, and has low economic cost.

[0013] The utility model will be further described below in combination with the embodiments and the drawings. DRAWINGS

[0014] Figure 1 is the arc extinguishing chamber installation schematic view of the utility model;

[0015] Figure 2 is the arc extinguishing chamber and reinforced contact point installation structure sectional view of the utility model;

[0016] Figure 3 is the arc extinguishing chamber structure schematic view of the utility model;

[0017] Figure 3A is the A-A direction schematic view of Figure 3 ;

[0018] Figure 3B is the B-B direction schematic view of Figure 3A ;

[0019] Figure 3C is the exhaust hole 3-4 structure schematic view.

[0020] In the figure: 1, railway signal relay cover, 2, fixed strip, 3, arc extinguishing chamber, 4, reinforced contact unit, 5 permanent magnet N, 6, permanent magnet S, 3-1, arc extinguishing space, 3-2, arc extinguishing baffle, 3-3, arc extinguishing grid, 3-4, arc extinguishing chamber exhaust hole. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and device adopted by the utility model to achieve the predetermined purpose, the specific implementation, structural features and device of the utility model are described in detail below in combination with the drawings and embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 As shown, this utility model relates to an arc-extinguishing device for high-power interruption of railway signal relays with enhanced contacts. It includes a railway signal relay housing 1, a fixing strip 2, and contact units 4; permanent magnets N5 and S6; the contact units 4 are positioned vertically by the permanent magnets N5 and S6. The device is characterized by including an arc-extinguishing chamber 3, which frames the contact units 4. The center horizontal plane of the arc-extinguishing chamber 3 is aligned with the permanent magnets N5 and S6. The dividing lines overlap, and the arc-extinguishing chamber 3 includes an arc-extinguishing space 3-1, an arc-extinguishing partition 3-2, and an arc-extinguishing grid 3-3. The arc-extinguishing partition 3-2 and the arc-extinguishing grid 3-3 are located within the arc-extinguishing space 3-1. When the relay reinforced contact unit 4 interrupts a large current, the permanent magnet N5 or permanent magnet S6 blows the arc generated by the contact interruption to the outside of the contact under the action of the magnetic field force, so that the arc enters the arc-extinguishing space 3-1. The arc-extinguishing partition 3-2 in the arc-extinguishing space 3-1 is used to isolate the arcs of the left and right sets of reinforced contacts. The arc-extinguishing grid 3-3 is used to divide the arcs of the reinforced contacts. This ensures the mechanical and electrical characteristics of the relay, ensures that the reinforced contacts can reliably interrupt high-power loads, and enhances the stability of the relay.

[0023] like Figure 3 , Figure 3A , Figure 3B , Figure 3C As shown, the arc-extinguishing chamber 3 includes a guide groove, which is connected by two fixing strips 2 inserted and fixed inside the outer cover 1 of the railway signal relay.

[0024] Place the railway signal relay cover 1 horizontally, and glue the two fixing strips 2 to the inner left and right sides of the cover with polyurethane adhesive so that the plane formed by the left and right sides coincides with and is parallel to the above-mentioned dividing line.

[0025] The arc extinguishing chamber 3 guide groove is coated with polyurethane adhesive, which is then bonded to the already firmly attached fixing strip 2 inside the outer cover.

[0026] The arc extinguishing chamber 3 has an arc extinguishing partition 3-2, which is located within the arc extinguishing space 3-1. The arc extinguishing partition 3-2 can isolate the electric arc between the left and right sets of reinforcing contacts, preventing short circuits caused by flying arcs.

[0027] The arc extinguishing chamber 3 has an arc extinguishing grid 3-3, which is located within the arc extinguishing space 3-1. The arc extinguishing grid 3-3 can cut the arc at the reinforcing contact and extinguish the arc quickly.

[0028] The arc-extinguishing chamber 3 includes an arc-extinguishing chamber exhaust port 3-4, which is used to discharge the smoke generated by the electric arc, so that the pressure inside and outside the arc-extinguishing chamber 3 is balanced.

[0029] The two fixing strips 2 and the arc extinguishing chamber 3 are both fixed by bonding them with polyurethane adhesive.

[0030] The arc-extinguishing chamber 3 is installed inside the railway signal relay housing at the following positions: 49 mm from the inner surface L1 of the railway signal relay housing 1 and 68.5 mm from the right inner surface L2 of the railway signal relay housing 1.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of implementation of the present utility model. Any changes, substitutions or improvements made to the structure and features described in the claims of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-power arc-extinguishing device for railway signal relays with enhanced contact interruption, comprising a railway signal relay housing (1), a fixing strip (2), and contact units (4); permanent magnet N (5) and permanent magnet S (6); the contact units (4) with permanent magnet N (5) and permanent magnet S (6) distributed vertically, characterized in that: The arc extinguishing chamber (3) frames the contact unit (4), the center horizontal plane of the arc extinguishing chamber (3) coincides with the split line formed by the permanent magnet N (5) and the permanent magnet S (6), the arc extinguishing chamber (3) comprises an arc extinguishing space (3-1), an arc extinguishing partition (3-2) and an arc extinguishing grid (3-3), the arc extinguishing partition (3-2) and the arc extinguishing grid (3-3) are arranged in the arc extinguishing space (3-1), the arc extinguishing partition (3-2) in the arc extinguishing space (3-1) is used for isolating the arcs of the left and right two groups of reinforced contacts; the arc extinguishing grid (3-3) is used for splitting the arcs of the reinforced contacts.

2. The arc extinguishing device for railway signal relay reinforced contact cutting high power according to claim 1, characterized in that: The arc extinguishing chamber (3) comprises a guide groove, and the guide groove of the arc extinguishing chamber (3) is formed by two fixed strips (2) inserted and fixed on the inner side of the railway signal relay cover (1).

3. The arc extinguishing device for railway signal relay reinforced contact cutting high power according to claim 2, characterized in that: The two fixed strips (2) are bonded on the inner side of the left and right sides of the cover by using polyurethane adhesive, so that the planes formed by the left and right sides coincide with the parallel split line.

4. The arc extinguishing device for railway signal relay reinforced contact cutting high power according to claim 1, characterized in that: The guide groove of the arc extinguishing chamber (3) is coated with polyurethane adhesive, and the polyurethane adhesive is bonded and connected with the fixed strip (2) which has been firmly pasted in the cover.

5. The arc extinguishing device for railway signal relay reinforced contact cutting high power according to claim 1, characterized in that: The arc extinguishing chamber (3) comprises an arc extinguishing chamber exhaust hole (3-4), which is used for discharging smoke generated by the arc, so that the pressure inside and outside the arc extinguishing chamber (3) is balanced.

6. The arc extinguishing device for railway signal relay reinforced contact cutting high power according to claim 2, characterized in that: The two fixed strips (2) and the arc extinguishing chamber (3) are bonded by using polyurethane adhesive.

7. The arc extinguishing device for railway signal relay reinforced contact cutting high power according to claim 1, characterized in that: The arc extinguishing chamber (3) is installed in the railway signal relay cover (1) at a position with a distance of 49mm from the inner side dimension L1 of the railway signal relay cover (1) and a distance of 68.5mm from the inner side dimension L2 of the right side of the railway signal relay cover (1).

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