Three-phase five-wire system electric switch machine simulation box

Abstract

The invention discloses a three-phase five-wire system electric switch machine simulation box, which belongs to the technical field of rail transit signal equipment, and adopts a high-power aluminum shell resistor to simulate a switch machine motor coil; three LED power indicator lamps are adopted to check the phase loss condition under the condition of three-phase current fault; a polarity holding relay is adopted to simulate the positioning and anti-position states of the switch machine; the time relay adopting power-on time delay is used for setting the action time of the simulation switch machine; a diode resistor circuit is adopted to simulate a rectifying circuit in an outdoor box of the switch machine; the AC-DC power supply module is used for supplying power to the time relay and the polarity holding relay. According to the invention, the control operation process of the switch machine, phase sequence inspection and definite and reverse position representation can be simulated, manual intervention is not needed, the efficiency of indoor turnout combination circuit wiring inspection is improved, the cost is reduced, and the operation is simple.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of rail transit signal equipment, and specifically relates to a three-phase five-wire electric switch machine simulation box. Background Art

[0002] Three-phase, five-wire AC electric switch machines are widely used on my country's rail transit lines. The S700K, ZDJ9, and ZYJ7 electro-hydraulic switch machines all utilize a three-phase, five-wire AC switch control circuit, encompassing both indoor switch assembly circuits and outdoor switch machine circuits, with essentially identical structures. Before a rail line opens, switches must be repeatedly, thoroughly, and completely tested to ensure they are foolproof. If a fault occurs in the indoor switch assembly circuit during routine maintenance, or if the indoor switch assembly is completed during construction but the outdoor switch machine is not yet in place, this can hinder testing of the indoor relay assembly circuit wiring, impacting the line's commissioning schedule.

[0003] To improve work efficiency, a number of indoor switch combination testing technologies and equipment have been proposed and implemented. Some of these testing methods and equipment rely on relay circuits, but their functionality is limited, and some require manual intervention, making the operation cumbersome. Others rely on embedded circuits, but achieving the same functionality requires complex hardware and software architectures, making implementation difficult and costly. Summary of the Invention

[0004] The technical solution of the present invention addresses the technical problem that the existing technical solutions are too simple, and provides a solution that is significantly different from the existing technology. It mainly provides a three-phase five-wire electric switch machine simulation box to solve the technical problems of the cumbersome functional operation process and complex software and hardware structure of the existing indoor turnout combination detection equipment raised in the above background technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A three-phase five-wire electric switch machine simulation box uses high-power aluminum-shell resistors to simulate the switch machine motor coils; uses three LED power indicator lights to check the phase loss in the event of a three-phase current fault; uses a polarity holding relay to simulate the switch machine's positioning and reverse states; uses a power-on delay time relay to set the simulated switch machine's action time; and uses a diode resistor circuit to simulate the rectifier circuit in the switch machine's outdoor box.

[0006] Furthermore, an AC to DC power supply module is used to power the time relay and the polarity holding relay. The power supply module converts AC 220V to DC 24V.

[0007] Furthermore, two time relays and two power supply modules are provided, and the time relays and the power supply modules are connected one to one; the two time relays respectively control the two coils of the polarity holding relay to be energized; one coil of the polarity holding relay is energized to indicate positioning, and the other coil is energized to indicate reverse position.

[0008] Furthermore, three high-power aluminum shell resistors are connected in parallel with three LED power indicator lights in a one-to-one correspondence, which can realize visual diagnosis of current path and three-phase loss diagnosis.

[0009] Furthermore, in the diode-resistor circuit, the diode and the resistor are connected in series, and the resistor is connected in parallel with an LED indicator light to provide real-time feedback on the conduction status of the diode. This eliminates the need to determine whether the fixed meter and reverse meter have faults through the fixed meter and reverse meter relay status or ATS, interlocking, and other interfaces, thereby realizing a dual-path indication circuit self-checking function.

[0010] Furthermore, in the diode-resistor circuit, the diode is 1N4007; the resistor is a 100 ohm wire-wound resistor with a power of 20W and a withstand voltage of 650V; the operating voltage of the LED indicator is 36V, the maximum withstand voltage is 690V, and the operating current range is less than or equal to 50mA.

[0011] Furthermore, the rated power of the high-power aluminum shell resistor is 500W.

[0012] Furthermore, the housing is made of a transparent insulating material, which ensures safe insulation, and the transparent device makes it easy to observe the state of the internal polarity retention relay.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention primarily includes a high-power aluminum-cased resistor, an LED power indicator, a polarity-maintaining relay, a time relay, and a diode-resistance circuit. Its simple hardware and software structure makes the simulation box compact, takes up little space, and is easy to carry. Furthermore, the present invention draws power directly from the X5 / X4 via two AC-to-DC power modules, unconstrained by the power supply in the working environment, making it convenient to carry and use.

[0014] (2) The present invention simulates the positioning and reverse states of the switch machine through the polarity holding relay. Compared with the traditional relay-based switch machine simulation box, it does not require manual knobs and human intervention, and the operation process is simple, which is conducive to improving the work efficiency of signal workers.

[0015] (3) This invention simulates the switch machine operation time by using the power-on delay function of a time relay. Compared with embedded switch machine simulation boxes, this method does not require programming to simulate the switch machine time, which simplifies the structure and helps reduce costs. In addition, this invention uses two sets of AC-DC power supply modules to directly draw power from X5 / X4, achieving dynamic power switching. This eliminates the need for a separate DC 24V battery, resulting in a streamlined structure and further reducing costs.

[0016] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the simulation box circuit of the three-phase AC electric switch machine in the present invention; Figure 2 It is the overall circuit of the indoor combination and simulation box in the present invention; Figure 3 This is a physical picture of the simulation box in the present invention; Figure 4 This is a physical picture of the simulation box used in the present invention. DETAILED DESCRIPTION

[0018] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly used by those skilled in the art to which the present invention pertains. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0020] Example: Please refer to the attached Figures 1-4 , a three-phase five-wire electric switch machine simulation box, comprising: High-power aluminum-shell resistor, used to simulate the switch motor coil; rated power is 500W; Three LED power indicators to check for phase loss in the event of a three-phase current fault; Polarity holding relay (DFJ), used to simulate the positioning and reverse states of the switch machine; The time relay for power-on delay is used to set the action time of the simulated switch machine; The diode-resistor circuit is used to simulate the rectifier circuit in the switch machine's outdoor box; The power module is used to supply power to the time relay and polarity holding relay.

[0021] The simulation box is equipped with a heat sink to prevent the resistor from overheating.

[0022] The simulation box is made of Yabuli board, which is insulated and safe, and the transparent device makes it easy to observe the status of the internal polarity holding relay.

[0023] Specific circuits such as Figure 1 As shown: Two 220V AC to 24V DC power modules are used to power the coils of time relays TA1 and TA2 and the polarity-holding relay DFJ. One power module's AC side is connected to X5, and the other's AC side is connected to X4. The other AC sides of both modules are connected to the common center point of high-power aluminum-encased resistors R2, R3, and R4. Time relays TA1 and TA2 use a power-on delay mode. Since the typical actuation time for electric point switches is 5-6 seconds, the delay time of the time delay relays is set to 6 seconds. A polarity-holding relay DFJ is used to indicate the position of the turnout. The normally closed switch of time relay TA1 is connected to terminal 3 of the polarity-holding relay DFJ, and the normally closed switch of time relay TA2 is connected to terminal 2 of the polarity-holding relay DFJ. Energizing coils 3 and 4 indicates a set position, while energizing coils 1 and 2 indicates a reverse position.

[0024] One end of the high-power aluminum-shell resistors R2, R3, and R4 are connected together to form a common center point connected to the power module. The other end of R2 is connected to X1, the other end of R3 is connected to X3 and X2 through a single-pole double-throw switch, and the other end of R4 is connected to X4 and X5 through a single-pole double-throw switch. Resistor R2 is connected in parallel with the LED power indicator L1, R3 is connected in parallel with the LED power indicator L2, and R4 is connected in parallel with the LED power indicator L3.

[0025] Two sets of diodes (D1 and D2) and resistors (R5 and R6) are connected in series to replace the diodes in the rectifier circuit. Resistor R5 is connected in parallel with LED indicator L4, and resistor R6 is connected in parallel with LED indicator L5 to provide real-time feedback on the diode conduction status. D1 and D2 are 1N4007 resistors, and resistors R5 and R6 are 100-ohm wirewound resistors with a power rating of 20W and a withstand voltage of 650V. The LED signal indicators L4 and L5 operate at a voltage of 36V, with a maximum withstand voltage of 690V and an operating current range of 50mA or less, ensuring normal operation even under the instantaneous current surge of three-phase power connection.

[0026] Combine Figure 2 The working principle of the above three-phase five-wire electric switch machine simulation box is as follows: During the fixed operation, three-phase AC current flows through X1, X2, and X5. Phase A current flows through R2, phase B current flows through R3, and phase C current flows through R4, illuminating L1, L2, and L3. Simultaneously, current from X5 flows through power module U1, generating 24V DC. Time relay TA1 is energized, and after 6 seconds, TA1 is pulled in. TA1's normally open contacts 5 and 9 connect, and coils 3 and 4 of polarity-holding relay DFJ are energized and pulled in, disconnecting the three-phase circuit. The indoor BHJ and 1DQJ drop, and the fixed operation ends.

[0027] When the meter is set, when the BB turnout indicates the sinusoidal AC current 4+, 3- on the secondary side of the transformer II, the current path is: BB4→1DQJ13,11→X1→R2→R4—DFJ121,122→X4→DBJ1,4→2DQJ132,131→1DQJ21,23→R12,1→BB3, so that DBJ is excited and attracted, and diode D1 is cut off; When the BB turnout indicates the transformer's secondary side 4-, 3+, the current path is: BB3→R1,2→1DQJ23,21→2DQJ131,132→DBJ4,1→X4→DFJ122,121→R4→R2→X1→1DQJ11,13→BB4; the other diode conduction bypass is: BB—R1,2→1DQJ23,21→2DQJ131,132→1DQJF13,11→X2→DFJ131,132→D1→R5→R3→R2→X1→1DQJ11,13→BB4.

[0028] During reverse operation, three-phase AC current flows through X1, X3, and X4. Phase A current flows through R2, phase B current flows through R4, and phase C current flows through R3, illuminating L1, L2, and L3. Simultaneously, current from X4 flows through power module U2, generating 24V DC. Time relay TA2 is energized, and after 6 seconds, TA2 is pulled in. TA2's normally open contacts 5 and 9 connect, energizing coils 1 and 2 of polarity-holding relay DFJ, disconnecting the three-phase circuit. The indoor BHJ and 1DQJ drop, and reverse operation ends.

[0029] In reverse order, when the BB turnout indicates a sinusoidal AC current 4+, 3- on the secondary side of the transformer II, the current path is: BB4→1DQJ13,11→X1→R2→R4—DFJ121,123→X5→FBJ1,4→2DQJ133,131→1DQJ21,23→R12,1→BB3, so that FBJ is excited and attracted, and the other diode is turned on and bypassed as follows: BB4→1DQJ13,11→X1→R2→R3→R6→D2→DFJ143,141→X3→2DQJ123,121→1DQF21,23→2DQJ133,131→1DQJ21,23→R12,1→BB3; When the BB turnout indicates the transformer's secondary side 4-, 3+, the current path is: BB3→R1,2→1DQJ23,21→2DQJ131,133→FBJ4,1→X5→DFJ123,121→R4→R2→X1→1DQJ11,13→BB4, diode D2 is cut off.

[0030] From the above, it can be seen that the simulation box provided by the present invention has the function of controlling the switch machine by the combined circuit in the switch machine room and displaying the function, and the simulation box has the following advantages: (1) The simulation box has a relatively simple hardware and software structure and a small size.

[0031] (2) The polarity-maintaining relay simulates the switch machine's positioning and reverse status, replacing the traditional manual knob based on the relay switch machine simulation box. This eliminates the need for manual intervention and improves the work efficiency of signal workers.

[0032] (3) The switch machine operation time is simulated by the power-on delay function of the time relay, replacing the embedded switch machine simulation box programming simulation switch machine time, simplifying the structure and reducing costs.

[0033] (4) Two sets of AC 220V to DC 24V power modules (U1 / U2) are used to directly draw power from X5 / X4, achieving dynamic power switching (U1 for fixed operation and U2 for reverse operation). This eliminates the need for an additional DC 24V battery, resulting in a streamlined structure and reduced costs. Furthermore, the working power adapts to the three-phase line state, resolving the test interruption problem caused by power failure in traditional simulation boxes. It is not restricted by the power supply in the working environment and is easy to carry and use.

[0034] (5) Through the parallel design of L1 / L2 / L3 indicator lights and R2 / R3 / R4 resistors, the current path is visually diagnosed and the three-phase loss is diagnosed in real time. By adding LED indicator lights (L4 / L5) in the fixed meter / reverse meter circuit, the diode conduction status is fed back in real time, and there is no need to judge whether the fixed meter / reverse meter has a fault through the fixed meter / reverse meter relay status or ATS, interlocking and other interfaces, thus realizing the dual-path circuit self-check function.

[0035] (6) By reserving voltage and current collection points (voltage is collected from two terminal leads, and current is collected by passing the wire through the current transformer coil, so the collection flexibility and operability are very strong), wiring can be connected on the terminal to collect the voltage of X1X2, X1X3, X1X4, and X1X5, and the wires passing through R1, R2, and R3 can be passed through the current transformer to detect the three-phase current. Through logical calculation of the data, the action or indication of the voltage, current, and time alarm can be realized. It has functional scalability, and can flexibly collect voltage and current as needed, with strong operability.

[0036] (7) A rectifier circuit is simulated by connecting D1 / D2 (1N4007) and R5 / R6 (100Ω 20W) in series, and a surge protection mechanism is formed by combining with a 690V withstand voltage LED indicator (L4 / L5).

[0037] In summary, the present invention can simulate the switch machine control operation process, phase sequence inspection and reverse position indication without manual intervention, which can improve the efficiency of indoor turnout combination circuit wiring inspection, reduce costs and simplify operation.

[0038] The above description of the present invention is exemplified in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A three-phase five-wire electric switch machine simulation box, characterized by: A high-power aluminum-shell resistor is used to simulate the switch machine motor coil; three LED power indicator lights are used to check the phase loss in the event of a three-phase current fault; a polarity holding relay is used to simulate the switch machine's positioning and reverse states; a time relay with power-on delay is used to set the simulated switch machine's action time; a diode resistor circuit is used to simulate the rectifier circuit in the switch machine's outdoor box.

2. A three-phase five-wire electric switch machine simulation box according to claim 1, characterized in that: An AC to DC power supply module is used to power the time relay and polarity holding relay.

3. The three-phase five-wire electric switch machine simulation box according to claim 2, characterized in that: There are two time relays and two power supply modules, and the time relays and the power supply modules are connected one to one; the two time relays respectively control the two coils of the polarity holding relay to be energized; when one coil of the polarity holding relay is energized, it indicates positioning, and when the other coil is energized, it indicates reverse positioning.

4. The three-phase five-wire electric switch machine simulation box according to claim 1, characterized in that: Three high-power aluminum shell resistors are connected in parallel with three LED power indicator lights in a one-to-one correspondence.

5. The three-phase five-wire electric switch machine simulation box according to claim 1, characterized in that: In the diode-resistor circuit, the diode and the resistor are connected in series, and the resistor is connected in parallel with an LED indicator light for real-time feedback of the diode conduction state.

6. The three-phase five-wire electric switch machine simulation box according to claim 2, characterized in that: The power supply module converts AC 220V to DC 24V.

7. The three-phase five-wire electric switch machine simulation box according to claim 1, characterized in that: In the diode-resistor circuit, the diode is 1N4007; and / or the resistor is a 100 ohm wire-wound resistor with a power of 20W and a withstand voltage of 650V.

8. The three-phase five-wire electric switch machine simulation box according to claim 5, characterized in that: The operating voltage of the LED indicator light is 36V, the maximum withstand voltage is 690V, and the operating current range is less than or equal to 50mA.

9. The three-phase five-wire electric switch machine simulation box according to claim 1, characterized in that: The rated power of the high-power aluminum shell resistor is 500W.

10. The three-phase five-wire electric switch machine simulation box according to claim 1, characterized in that: The shell is made of transparent insulating material.

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