Phase modulation lightning protection device suitable for 50Hz phase-sensitive track circuit

Abstract

The invention relates to the technical field of lightning protection devices, and discloses a phase modulation lightning protection device suitable for a 50Hz phase-sensitive track circuit, which comprises an insulating base, two phase modulation compensation inductors are symmetrically mounted on one side of the top of the insulating base, and discharge resistors are mounted on one sides of the two phase modulation compensation inductors. Two groups of valve plates are symmetrically mounted on the other side of the top of the insulating base; by introducing track impedance to carry out phase testing, original capacitance compensation is changed into inductance compensation, so that the matching success rate of the phase modulation lightning protection device is greatly improved, the function that the phase modulation lightning protection device can be 100% matched with a 50Hz phase-sensitive track circuit is achieved, the function of solving the problem of track impedance is achieved, and the reliability of the phase modulation lightning protection device is improved. In this way, the problem that phase adjustment cannot completely meet track impedance is thoroughly solved, field debugging is 100% qualified, the integrity and one-time adjustment of a track circuit are effectively improved, and the construction workload is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of lightning arresters, in particular to a phase-modulating lightning arrester suitable for a 50 Hz phase-sensitive track circuit. Background Art

[0002] Phase-modulation lightning arrester is a device used to protect power system equipment from lightning strikes and overvoltage. It eliminates overvoltage and lightning strikes by adjusting the phase difference in the power system, thereby protecting the equipment from damage. Phase-modulation lightning arrester is mainly composed of phase-modulation inductor, capacitor and discharge resistor. When lightning strike or overvoltage occurs in the system, the phase-modulation inductor will form a resonant circuit in the system through the capacitor to consume the overvoltage and lightning strike. The discharge resistor is used to protect the capacitor from being broken down by overvoltage.

[0003] The functions of the phase-shifting lightning arrester include protecting transformers, circuit breakers, cables and other equipment from damage caused by overvoltage and lightning strikes, improving the stability and reliability of the power system, and the phase-shifting lightning arrester can also extend the service life of the equipment, reduce maintenance costs, and improve the economic benefits of the power system;

[0004] However, the existing phase-modulating lightning arrester is mainly used in 50Hz phase-sensitive track circuits to suppress surge current impact in 50Hz track circuits, and has matching circuit impedance to make the phase angle of the track voltage and the local voltage coincide (i.e., in-phase 0°±20°), so that the subsequent equipment can work smoothly. According to the circuit design, a fine-tuning capacitor is incorporated to change the phase angle. The phase-modulating lightning arrester is used to suppress surge current impact in the 50Hz track circuit, and has matching circuit impedance to make the phase angle of the track voltage match the local voltage (i.e. 0°±20° in phase) so that the subsequent equipment can work smoothly. According to the circuit design, a fine-tuning capacitor is incorporated to change the phase angle. We found that the original capacitor compensation of the phase-modulating lightning arrester will produce a mismatch with the 50Hz phase-sensitive track circuit. After actual measurement, it was found that there is a 15% probability of mismatch. Due to the large discreteness of the performance of ferromagnetic parts, the impedance of the isolation transformer produced by the same manufacturing process will have a large deviation, resulting in the phase adjustment of the phase-modulating lightning arrester cannot fully meet the track impedance problem, and the on-site debugging cannot be 100% qualified, which reduces the integrity of the track circuit and the success rate of one-time adjustment, and increases the workload of construction. Summary of the invention

[0005] The purpose of the present invention is to adapt the existing device to a phase-modulating lightning arrester for a 50Hz phase-sensitive track circuit. The advantage of the present invention is that the phase-modulating lightning arrester can be 100% matched with the 50Hz phase-sensitive track circuit, thereby satisfying the function of the track impedance problem.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a phase-modulating lightning arrester suitable for a 50Hz phase-sensitive track circuit, comprising an insulating base, two phase-modulating compensation inductors are symmetrically installed on one side of the top of the insulating base, a discharge resistor is installed on one side of the two phase-modulating compensation inductors, two groups of valve plates are symmetrically installed on the other side of the top of the insulating base, spark gaps are symmetrically installed on both sides of the two groups of valve plates, a capacitor is installed at the bottom of the valve plate, and a wiring terminal fixedly connected to the insulating base is provided at the bottom of the capacitor.

[0007] The above technical solution is adopted: by introducing the track impedance for phase testing, the original capacitor compensation is changed to inductor compensation, which greatly improves the matching success rate of the phase-modulating lightning arrester, so that the phase-modulating lightning arrester can be 100% matched with the 50Hz phase-sensitive track circuit, thereby meeting the function of the track impedance problem. This completely solves the problem that the phase adjustment cannot fully meet the track impedance, makes the on-site debugging 100% qualified, effectively improves the integrity of the track circuit and one-time adjustment, and greatly reduces the construction workload.

[0008] The present invention is further configured such that a protective shell is installed on the top of the insulating base, and a hanging hole is opened on the top of the protective shell.

[0009] The above technical solution is adopted to facilitate the protection of the internal parts of the phase-modulating lightning arrester and to increase the service life of the phase-modulating lightning arrester.

[0010] The present invention is further configured such that both sides of the bottom of the protective shell are provided with mounting screw holes for use with the insulating base.

[0011] By adopting the above technical solution, it is convenient to fix the protective housing to the top of the insulating base using screws or rivets.

[0012] The present invention is further configured such that the structural appearance of the insulating base and the protective shell is an AX safety relay structure.

[0013] The above technical solution is adopted to facilitate the application of the phase-modulation lightning arrester to the Hz phase-sensitive track circuit.

[0014] The present invention is further configured such that the structural dimensions of the insulating base and the protective shell are 165 mm in length, 49 mm in width, and 157 mm in height.

[0015] By adopting the above technical solution, the structural size of the phase-modulating lightning arrester is reduced, making it easier to install the phase-modulating lightning arrester in a narrow place.

[0016] The present invention is further configured such that the phase-modulation compensation inductor, capacitor, discharge resistor, spark gap, valve plate, and wiring terminal all pass qualified detection and aging screening processing.

[0017] The above technical solution is adopted to ensure the normal functions of the internal parts of the phase-modulating lightning arrester and to increase the service life of the phase-modulating lightning arrester.

[0018] The present invention is further configured such that the protective shell is made of metal material, and the surface of the protective shell is coated with a flame retardant coating.

[0019] The above technical solution is adopted to improve the heat dissipation effect of the protective shell on the internal parts of the phase-modulating lightning arrester, while improving the flame retardant performance of the phase-modulating lightning arrester and providing fire protection for the internal parts.

[0020] The present invention is further configured such that the phase-modulation compensation inductor, capacitor, discharge resistor, spark gap, valve plate, and wiring terminals are all standard parts.

[0021] The above technical solution is adopted to facilitate the replacement of internal parts of different phase-modulating lightning arresters for normal use, thereby improving the applicability of the parts.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention introduces track impedance to perform phase testing so that the original capacitor compensation is changed to inductor compensation, which greatly improves the matching success rate of the phase-modulating lightning arrester and achieves the function of enabling the phase-modulating lightning arrester to 100% match the 50Hz phase-sensitive track circuit, thereby meeting the function of the track impedance problem. This completely solves the problem that the phase adjustment cannot fully meet the track impedance, makes the on-site debugging 100% qualified, effectively improves the integrity of the track circuit and the one-time adjustment, and greatly reduces the construction workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 The schematic diagram of the working circuit of the present invention is shown in FIG.

[0026] In the figure: 1. Insulating base; 2. Phase compensation inductor; 3. Capacitor; 4. Discharge resistor; 5. Spark gap; 6. Valve plate; 7. Wiring terminal; 8. Mounting screw hole; 9. Protective shell; 10. Hanging hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1:

[0029] refer to Figure 1 , a phase-modulating lightning arrester suitable for 50Hz phase-sensitive track circuits, including an insulating base 1, two phase-modulating compensation inductors 2 are symmetrically installed on one side of the top of the insulating base 1, and a discharge resistor 4 is installed on one side of the two phase-modulating compensation inductors 2, and two groups of valve plates 6 are symmetrically installed on the other side of the top of the insulating base 1, and spark gaps 5 are symmetrically installed on both sides of the two groups of valve plates 6, and capacitors 3 are installed at the bottom of the valve plates 6, and a terminal 7 fixedly connected to the insulating base 1 is arranged at the bottom of the capacitor 3; by introducing the track impedance for phase testing, the original capacitor compensation is changed to inductance compensation, which greatly improves the matching success rate of the phase-modulating lightning arrester, so that the phase-modulating lightning arrester can be 100% matched with the 50Hz phase-sensitive track circuit, thereby meeting the function of the track impedance problem, which completely solves the problem that the phase adjustment cannot fully meet the track impedance, so that the on-site debugging can be 100% qualified, effectively improves the integrity and one-time adjustment of the track circuit, and greatly reduces the workload of construction.

[0030] refer to Figure 1 A protective shell 9 is installed on the top of the insulating base 1, and a hanging hole 10 is opened on the top of the protective shell 9 to facilitate the protection of the internal parts of the phase-modulating lightning arrester and improve the service life of the phase-modulating lightning arrester.

[0031] refer to Figure 1 Both sides of the bottom of the protective shell 9 are provided with mounting screw holes 8 for use with the insulating base 1, so that the protective shell 9 can be fixed to the top of the insulating base 1 using screws or rivets.

[0032] refer to Figure 1 The structural appearance of the insulating base 1 and the protective shell 9 is an AX safety relay structure, which is convenient for the phase-adjusting lightning arrester to be applied to a 50Hz phase-sensitive track circuit.

[0033] refer to Figure 1 The structural dimensions of the insulating base 1 and the protective shell 9 are 165 mm in length, 49 mm in width, and 157 mm in height, which reduces the structural size of the phase-modulating lightning arrester and facilitates the installation of the phase-modulating lightning arrester in a narrow place.

[0034] refer to Figure 1 The phase-modulation compensation inductor 2, capacitor 3, discharge resistor 4, spark gap 5, valve plate 6, and terminal 7 have all passed the qualified detection and aging screening process to ensure the normal function of the internal parts of the phase-modulation lightning arrester and improve the service life of the phase-modulation lightning arrester.

[0035] refer to Figure 1The protective shell 9 is made of metal material, and the surface of the protective shell 9 is coated with a flame retardant coating to improve the heat dissipation effect of the protective shell 9 on the internal parts of the phase-modulating lightning arrester, while improving the flame retardant performance of the phase-modulating lightning arrester and providing fire protection for the internal parts.

[0036] refer to Figure 1 The phase-modulation compensation inductor 2, capacitor 3, discharge resistor 4, spark gap 5, valve plate 6, and terminal 7 are all standard parts, which facilitates the normal use of internal parts of different phase-modulation lightning arresters and improves the applicability of the parts.

[0037] Embodiment 2:

[0038] refer to Figure 2 , suitable for phase-modulating lightning arresters for 50Hz phase-sensitive track circuits;

[0039] The phase-modulating lightning arrester adopts a phase-modulating lightning protection transformer, which makes it have a strong over-current impact protection capability;

[0040] When the input voltage of the track input terminal of the phase-modulation lightning arrester is 15V / 50Hz, the current should be 20mA±2mA;

[0041] The phase-modulating lightning arrester is a device installed at the AX-type safety relay socket position in the 50Hz track circuit standard combination.

[0042] At the same time, the phase-modulated lightning arrester should work reliably under the following environmental conditions:

[0043] 1. Ambient air temperature: -25℃~~+60℃;

[0044] 2. Relative humidity of surrounding air: not more than 90% (when the temperature is +25℃);

[0045] 3. Atmospheric pressure: 70.KPa (equivalent to an altitude of less than 3000m);

[0046] 4. Vibration frequency: 1Hz~35Hz, acceleration amplitude: 5m / s2(0.5g);

[0047] 5. There is no harmful gas that may cause corrosion or explosion around.

[0048] Among them reference Figure 2 :

[0049] 72 and 82 as well as 51 and 61 are phase adjustment terminals;

[0050] 71 is track 1 input +, 81 is track 1 input -;

[0051] 73 is track 1 input 1+, 83 is track 1 input 1-;

[0052] 52 is track 1 input 2+, 62 is track 1 input 2-;

[0053] 53 is track 2 input +, 63 is track 2 input -;

[0054] 32 is track 2 input 1+, 42 is track 2 input 1-;

[0055] 31 is track 2 input 2+, 41 is track 2 input 2-;

[0056] In summary, by introducing the track impedance for phase testing, the original capacitor compensation is changed to inductor compensation, which greatly improves the matching success rate of the phase-modulating lightning arrester, so that the phase-modulating lightning arrester can be 100% matched with the 50Hz phase-sensitive track circuit, thereby satisfying the track impedance problem. This completely solves the problem that the phase adjustment cannot fully meet the track impedance, and makes the on-site debugging 100% qualified, effectively improving the integrity and one-time adjustment of the track circuit, and greatly reducing the construction workload; the phase-modulating lightning arrester has a certain function of adjusting the phase shift of the track signal, ensuring the reliability of the final execution of the 50Hz track circuit, and has the function of overvoltage protection and automatic recovery. It is the core component in the 5OHz track circuit.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A phase-modulating lightning arrester suitable for a 50 Hz phase-sensitive track circuit, comprising an insulating base (1), characterized in that: Two phase-adjusting compensation inductors (2) are symmetrically mounted on one side of the top of the insulating base (1), and a discharge resistor (4) is mounted on one side of each of the two phase-adjusting compensation inductors (2). Two groups of valve plates (6) are symmetrically mounted on the other side of the top of the insulating base (1), and spark gaps (5) are symmetrically mounted on both sides of the two groups of valve plates (6). A capacitor (3) is mounted on the bottom of the valve plates (6), and a wiring terminal (7) fixedly connected to the insulating base (1) is provided at the bottom of the capacitor (3).

2. The phase-modulating lightning arrester suitable for 50Hz phase-sensitive track circuit according to claim 1 is characterized in that: A protective shell (9) is installed on the top of the insulating base (1), and a hanging hole (10) is opened on the top of the protective shell (9).

3. The phase-modulating lightning arrester suitable for 50Hz phase-sensitive track circuit according to claim 2 is characterized in that: Both sides of the bottom of the protective shell (9) are provided with mounting screw holes (8) for use with the insulating base (1).

4. The phase-modulating lightning arrester suitable for 50Hz phase-sensitive track circuit according to claim 2 is characterized in that: The structural appearance of the insulating base (1) and the protective shell (9) is an AX safety relay structure.

5. The phase-modulating lightning arrester suitable for 50Hz phase-sensitive track circuit according to claim 2 is characterized in that: The structural dimensions of the insulating base (1) and the protective shell (9) are 165 mm in length, 49 mm in width and 157 mm in height.

6. The phase-modulating lightning arrester suitable for 50Hz phase-sensitive track circuit according to claim 1 is characterized in that: The phase-modulation compensation inductor (2), capacitor (3), discharge resistor (4), spark gap (5), valve plate (6), and wiring terminal (7) have all passed the qualified detection and aging screening process.

7. The phase-modulating lightning arrester suitable for 50Hz phase-sensitive track circuit according to claim 2 is characterized in that: The protective shell (9) is made of metal material, and the surface of the protective shell (9) is coated with a flame retardant coating.

8. The phase-modulating lightning arrester suitable for 50Hz phase-sensitive track circuit according to claim 1 is characterized in that: The phase-modulation compensation inductor (2), capacitor (3), discharge resistor (4), spark gap (5), valve plate (6), and wiring terminal (7) are all standard parts.

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