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

Abstract

The invention relates to an arc quenching method for cutting off high power through a railway signal relay reinforcing contact. A railway signal relay outer cover (1), a fixing strip (2) and a contact unit (4) are included. 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). On the basis of an existing railway signal relay reinforcing contact, the flash barrier is removed, the arc extinguishing chamber is designed and manufactured aiming at an existing structure, the cut-off power of the reinforcing contact is improved to three times under the same circuit using condition, the universality is high, and the economic cost is low.

Description

[0001] The invention relates to an arc extinguishing method for strengthening contacts to cut off high power, in particular to an arc extinguishing method for strengthening contacts to cut off high power of a railway signal relay. Background Art

[0002] Railway signal relay is the core component of railway signal equipment. In railway signal automatic control and remote control system, it can be used to form logic circuit or as an actuator, among which the reliability of load cutting of contact unit is particularly important.

[0003] The existing method of cutting off high power with reinforced contacts is to use permanent magnets to blow arcs. Due to the limited internal space of the relay, the arc extinguishing effect that can be produced by this method has achieved the best effect. However, when using this method to cut off the high power load of the reinforced contacts, the arc extinguishing effect is very weak. In some extreme cases, the arc cannot be extinguished, resulting in the ablation of the reinforced contacts. Therefore, it is urgent to develop a suitable arc extinguishing method based on the existing reinforced contact structure of railway signal relays to meet the demand for cutting off the high power of the reinforced contacts. Summary of the invention

[0004] The object of the present invention is to provide a relay reinforced contact arc extinguishing device and method which can ensure the mechanical and electrical characteristics of the relay and the stability of the reinforced contact in reliably cutting off the high-power load.

[0005] In order to solve the above problems, the technical scheme of the present invention is: it relates to a method for extinguishing arcs of railway signal relays to strengthen contacts to cut off high power, including a railway signal relay cover, a fixing bar, a contact unit; permanent magnetic steel N, permanent magnetic steel S; the upper and lower positions of the contact unit where the permanent magnetic steel N and the permanent magnetic steel S are distributed, and is characterized in that: it includes an arc extinguishing chamber, the arc extinguishing chamber frames the contact unit, and the central horizontal plane of the arc extinguishing chamber is aligned with the permanent magnetic steel N and the permanent magnetic steel S The dividing lines formed overlap, and the arc extinguishing chamber includes an arc extinguishing space, an arc extinguishing partition, and an arc extinguishing grid. The arc extinguishing partition and the arc extinguishing grid are in the arc extinguishing space. When the relay reinforced contact unit disconnects a large current, the permanent magnet N or the permanent magnet S blows the arc generated by the contact disconnection to the outside of the contact under the action of the magnetic field force, so that the arc enters the arc extinguishing space; the arc extinguishing partition in the arc extinguishing space is used to isolate the arcs of the left and right groups of reinforced contacts; the arc extinguishing grid is used to divide the arcs of the reinforced contacts; the mechanical and electrical characteristics of the relay are guaranteed, and the reinforced contacts are guaranteed to reliably cut off the high-power load, so that the stability of the relay is enhanced.

[0006] The arc extinguishing chamber comprises a guide groove, and the guide groove of the arc extinguishing chamber is connected by inserting two fixing strips fixed on the inner side of the outer cover of the railway signal relay to form a guide groove.

[0007] The two fixing strips are bonded to the inner left and right surfaces of the outer cover with polyurethane adhesive so that the planes formed by the left and right surfaces coincide with and are parallel to the above-mentioned dividing line.

[0008] The arc-extinguishing chamber guide groove is coated with polyurethane adhesive, and the polyurethane adhesive is adhesively connected to the fixing strip that has been firmly pasted in the outer cover.

[0009] The arc extinguishing chamber is provided with an arc extinguishing partition, which is in the arc extinguishing space. The arc extinguishing partition can isolate the arc between the left and right groups of reinforced contacts to prevent arcing short circuit.

[0010] The arc extinguishing chamber is provided with an arc extinguishing grid, which is in the arc extinguishing space. The arc extinguishing grid can cut the arc of the reinforced contact and extinguish the arc quickly.

[0011] The arc extinguishing chamber comprises an arc extinguishing chamber exhaust hole, which is used to exhaust smoke generated by the electric arc, so that the pressure inside and outside the arc extinguishing chamber is balanced.

[0012] The two fixing strips and the arc extinguishing chamber are fixed to each other by respectively bonding them with polyurethane glue.

[0013] The position where the arc extinguishing chamber is installed in the outer cover of the railway signal relay is: the dimension L1 from the upper inner surface of the outer cover of the railway signal relay is 49 mm, and the dimension L2 from the right inner surface of the outer cover of the railway signal relay is 68.5 mm.

[0014] The advantages of the present invention are: based on the existing railway signal relay reinforced contacts, the arc isolation plate is improved into an arc extinguishing chamber, the cutting power of the reinforced contacts is improved without changing the technical conditions of the existing contact units, and the main structure of the railway signal relay is not changed, the present invention has strong universality and low economic cost.

[0015] The present invention will be further described below in conjunction with the embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the installation of the arc extinguishing chamber of the present invention; Figure 2 It is a cross-sectional view of the arc extinguishing chamber and the reinforced contact installation structure of the present invention; Figure 3 It is a schematic diagram of the arc extinguishing chamber structure of the present invention; Figure 3A yes Figure 3 Schematic diagram of AA direction; Figure 3B yes Figure 3A Schematic diagram of BB direction; Figure 3C It is a schematic diagram of the structure of the exhaust hole 3-4.

[0017] In the figure: 1. Railway signal relay cover, 2. Fixing bar, 3. Arc extinguishing chamber, 4. Strengthening contact unit, 5. Permanent magnet N, 6. Permanent magnet S, 3-1. Arc extinguishing space, 3-2. Arc extinguishing partition, 3-3. Arc extinguishing grid, 3-4. Arc extinguishing chamber exhaust hole. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and methods adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and methods of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention relates to an arc extinguishing method for strengthening the contact of a railway signal relay to cut off high power, comprising a railway signal relay outer cover 1, a fixing bar 2, a contact unit 4; a permanent magnetic steel N5, a permanent magnetic steel S6; the contact unit 4 is distributed at the upper and lower positions of the permanent magnetic steel N5 and the permanent magnetic steel S6, and is characterized in that: an arc extinguishing chamber 3 is included, the arc extinguishing chamber 3 frames the contact unit 4, and the central horizontal plane of the arc extinguishing chamber 3 is aligned with the permanent magnetic steel N5 and the permanent magnetic steel S6. The dividing lines are overlapped, 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 in the arc extinguishing space 3-1. When the relay reinforced contact unit 4 breaks the large current, the permanent magnet N5 or the permanent magnet S6 blows the arc generated by the contact breaking 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 groups of reinforced contacts; the arc extinguishing grid 3-3 is used to divide the arcs of the reinforced contacts; the mechanical and electrical characteristics of the relay are guaranteed, the reinforced contacts are guaranteed to reliably cut off the high-power load, and the stability of the relay is enhanced.

[0020] like Figure 3 , Figure 3A , Figure 3B , Figure 3C As shown, the arc extinguishing chamber 3 includes a guide groove, and the guide groove of the arc extinguishing chamber 3 is connected by inserting two fixing strips 2 fixed on the inner side of the outer cover 1 of the railway signal relay to form a guide groove.

[0021] The railway signal relay cover 1 is placed horizontally, and two fixing strips 2 are bonded to the inner left and right surfaces of the cover with polyurethane adhesive so that the plane formed by the left and right surfaces coincides with and is parallel to the above-mentioned dividing line.

[0022] The guide groove of the arc extinguishing chamber 3 is coated with polyurethane adhesive, and the polyurethane adhesive is adhesively connected to the fixing strip 2 that has been firmly pasted in the outer cover.

[0023] The arc extinguishing chamber 3 has an arc extinguishing clapboard 3-2, which is in the arc extinguishing space 3-1. The arc extinguishing clapboard 3-2 can isolate the arc between the left and right groups of reinforced contacts to prevent arcing short circuit.

[0024] The arc extinguishing chamber 3 has an arc extinguishing grid 3-3, and the arc extinguishing grid 3-3 is in the arc extinguishing space 3-1. The arc extinguishing grid 3-3 can cut the arc of the reinforced contact and extinguish the arc quickly.

[0025] The arc extinguishing chamber 3 includes an arc extinguishing chamber exhaust hole 3-4, and the arc extinguishing chamber exhaust hole 3-4 is used to exhaust smoke generated by the arc, so that the pressure inside and outside the arc extinguishing chamber 3 is balanced.

[0026] The two fixing strips 2 and the arc extinguishing chamber 3 are fixed to each other by respectively bonding them with polyurethane glue.

[0027] The arc extinguishing chamber 3 is installed in the railway signal relay housing at a position where the distance from the inner surface dimension L1 on the railway signal relay housing 1 is 49 mm, and the distance from the right inner surface dimension L2 on the railway signal relay housing 1 is 68.5 mm.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any changes, substitutions or improvements made to the structures and features described in the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for extinguishing arcs by strengthening the contact of a railway signal relay to cut off high power, comprising a railway signal relay housing (1), a fixing bar (2), a contact unit (4); a permanent magnetic steel N (5), a permanent magnetic steel S (6); and upper and lower positions of the contact unit (4) where the permanent magnetic steel N (5) and the permanent magnetic steel S (6) are distributed, wherein: The arc extinguishing chamber (3) includes an arc extinguishing chamber (3) which frames a contact unit (4). The central horizontal plane of the arc extinguishing chamber (3) is aligned with a permanent magnetic steel N (5) and a permanent magnetic steel S (6). The dividing lines formed 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 in the arc extinguishing space (3-1). When the relay reinforced contact unit (4) disconnects a large current, the permanent magnetic steel N (5) or the permanent magnetic steel S (6) blows the arc generated by the contact disconnection 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 groups of reinforced contacts; the arc extinguishing grid (3-3) is used to divide the arcs of the reinforced contacts; the mechanical characteristics and electrical characteristics of the relay are ensured, and the reinforced contacts are ensured to reliably disconnect the high-power load, so that the stability of the relay is enhanced.

2. The method for arc extinguishing of a railway signal relay with enhanced contacts to cut off 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 connected to the guide groove by inserting two fixing strips (2) fixed on the inner side of the railway signal relay cover (1).

3. The arc extinguishing method for strengthening the contact of a railway signal relay to cut off high power according to claim 2, characterized in that: The two fixing strips (2) are bonded to the left and right inner surfaces of the outer cover with polyurethane adhesive so that the planes formed by the left and right surfaces coincide with and are parallel to the above-mentioned dividing line.

4. The method for arc extinguishing of a railway signal relay with enhanced contacts to cut off high power according to claim 1, characterized in that: The arc extinguishing chamber (3) guide groove is coated with polyurethane adhesive, and the polyurethane adhesive is adhesively connected to the fixing strip (2) that has been firmly attached to the outer cover.

5. The arc extinguishing method for strengthening the contact of a railway signal relay to cut off high power according to claim 1, characterized in that: The arc extinguishing chamber (3) has an arc extinguishing partition (3-2), which is located in the arc extinguishing space (3-1). The arc extinguishing partition (3-2) can isolate the arc between the left and right groups of reinforced contacts to prevent arcing and short circuit.

6. The arc extinguishing method for strengthening the contact of a railway signal relay to cut off high power according to claim 1, characterized in that: The arc extinguishing chamber (3) comprises an arc extinguishing grid (3-3), the arc extinguishing grid (3-3) is in the arc extinguishing space (3-1), and the arc extinguishing grid (3-3) can cut the arc of the reinforced contact and quickly extinguish the arc.

7. The arc extinguishing method for strengthening the contact of a railway signal relay to cut off high power according to claim 1, characterized in that: The arc extinguishing chamber (3) comprises an arc extinguishing chamber exhaust hole (3-4), and the arc extinguishing chamber exhaust hole (3-4) is used to exhaust smoke generated by the electric arc, so that the pressure inside and outside the arc extinguishing chamber (3) is balanced.

8. The method for arc extinguishing of a railway signal relay with enhanced contacts to cut off high power according to claim 2, characterized in that: The two fixing strips (2) and the arc extinguishing chamber (3) are fixed to each other by respectively bonding them with polyurethane glue.

9. The arc extinguishing method for strengthening the contact of a railway signal relay to cut off high power according to claim 1, characterized in that: The arc extinguishing chamber (3) is installed in the railway signal relay housing at a position where the distance from the inner surface dimension L1 on the railway signal relay housing (1) is 49 mm, and the distance from the right inner surface dimension L2 on the railway signal relay housing (1) is 68.5 mm.

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