Low-cost automatic temperature control turnout snow melting device

Abstract

The utility model provides a low-cost automatic temperature control turnout snow melting device which comprises an indoor control area, an in-situ power box, a rail temperature sensor and a heating strip, a control switch and an emergency switch are arranged in the indoor control area, and an alternating current contactor, a temperature control module and a temperature control module contact are arranged in the in-situ power box. The control switch is connected with a front contact of the temperature control module, a middle contact of the temperature control module is connected to a control coil contact of the AC contactor, and the emergency switch is connected to the control coil contact of the AC contactor. A power supply is connected to the input terminal through an in-situ power box lead-in port, the output end of the alternating current contactor is connected to the junction box, and a lead-out wire at one end of the heating strip is connected to the junction box to form a heating loop. And the rail temperature sensor is connected with the temperature control module through the junction box. According to the utility model, an automatic control mode and a manual emergency mode can be realized, intermittent cyclic heating is carried out, and the purposes of snow melting and deicing are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of urban rail transit automatic control, specifically is a low -cost automatic temperature control switch snow melting device. BACKGROUND

[0002] Switch is the important component of rail transit signal system. When freezing or snowing in winter, if the switch snow of open air section and elevated line is not cleaned in time or the ice is not removed completely, the tip of switch tongue and the basic rail will not be close or the conversion will be blocked, which will cause switch failure and have great influence on rail transit operation. The traditional manual snow removal and ice removal method is to clean the ice and snow of switch area in the interval by personnel at regular intervals, which has the disadvantages of low efficiency, high labor cost, high safety risk of live working and the like. The switch snow melting device can effectively solve the problems. At present, the switch snow melting devices on the market are generally designed for the application scene of long time and large snow in northern region. For the central city with low temperature of-8 to-2 DEG C, less snow days, short duration of low temperature and single snow amount of 2-10mm, the device has the defects of large investment, low use efficiency and poor economy. SUMMARY

[0003] In view of the above-mentioned deficiencies of the prior art, the utility model provides a low -cost automatic temperature control switch snow melting device, which can realize automatic control mode and manual emergency mode, intermittent cyclic heating, small power, low investment and automatic temperature control, and is more suitable for short time and low snow application scene.

[0004] The utility model provides a technical scheme: a low -cost automatic temperature control switch snow melting device, including indoor control area, present place power supply box, track temperature sensor and heating strip, be provided with control switch and emergency switch in the indoor control area, be provided with AC contactor, temperature control module and temperature control module contact point in the present place power supply box, control switch connects the front contact point of temperature control module, the middle contact point of temperature control module is connected to the control coil contact point of AC contactor, emergency switch is connected to the control coil contact point of AC contactor, and indoor control area 220ACV power supply is connected to input terminal through the present place power supply box introduction mouth, is used for the power supply of AC contactor, temperature control module contact point and temperature control module, three -phase four -wire system power supply is connected to input terminal row through the present place power supply box introduction mouth through cable, is used for the power supply of heating strip loop, the output end of AC contactor is connected to junction box, and the one end of heating strip leads out line is connected to junction box and constitutes heating loop, and track temperature sensor is connected with temperature control module through junction box.

[0005] Further, the input circuit breaker and the output circuit breaker are arranged in the local power supply box, one end of the input circuit breaker is connected with the three-phase four-wire power supply, the other end of the input circuit breaker is connected with the AC contactor, three output circuit breakers are arranged on the three output branch circuits of the local power supply box, one end of each output circuit breaker is connected with the AC contactor, and the other end of each output circuit breaker is connected with the junction box.

[0006] Further, the heating strip is flat in cross section and is installed on the inside rail waist of the base rail.

[0007] Further, the heating strip is fixed to the lower part of the inside rail waist of the base rail through an adjustable fixing clamp, the adjustable fixing clamp comprises a fixing plate and a clamp opening for clamping the heating strip, a plurality of fixing holes are arranged on the fixing plate in the vertical direction for adjusting the installation height, and the fixing plate is connected and fixed with the rail mounting hole through a screw rod.

[0008] Further, the rail temperature sensor comprises a fixing member and a temperature sensor, the temperature sensor is installed on the bottom of the base rail through the fixing member, and the temperature sensor is connected with the temperature control module through a three-core four-fluorine shielding wire through the junction box.

[0009] Further, the fixing member comprises a hook lock and a fastening screw, the middle part of the hook lock is provided with a clamping groove for fixing the temperature sensor, the two ends of the hook lock are provided with hook openings for hooking the bottom of the rail, and the hooking force of the hook lock is controlled through the outside fastening screw.

[0010] Further, the junction box is composed of a shell and a wiring part, the shell is formed by hot pressing of SMC composite material, and the wiring part adopts six-column ceramic terminals to connect the external heating strip cable and the rail temperature sensor transmission line to the local power supply box.

[0011] The utility model discloses the beneficial effect:

[0012] (1) through the rail temperature sensor, the steel rail temperature is collected to start and close the system heating circuit and can realize automatic control mode and manual emergency mode.

[0013] (2) through the rail waist suspension type fixing device and installation mode, ensure that the heating component can be reliably placed between the switch rail and the base rail, and the device reliability and stability are improved.

[0014] (3) efficient use of the three-phase power supply and equipment redundant cable in the trackside interval, solve the power supply and control cable problem; the device structure is simple, has the characteristics such as small power, low investment and automatic temperature control, reduces the installation and maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the control principle block diagram of the utility model;

[0016] Figure 2 is the structure diagram of the heating strip pavement of the utility model;

[0017] Figure 3 is the sectional view of the heating strip pavement of the utility model;

[0018] Figure 4 is the schematic diagram of the installation of the heating strip and the basic rail of the utility model;

[0019] Figure 5 is the structure diagram of the adjustable fixed clamp of the utility model;

[0020] Figure 6 is the structure diagram of the rail temperature sensor of the utility model;

[0021] In the drawing: 1 - indoor control area, 2 - control switch, 3 - emergency switch, 4 - local power supply box, 5 - temperature control module, 6 - temperature control module contact, 7 - input circuit breaker, 8 - output circuit breaker, 9 - AC contactor, 10 - junction box, 11 - rail temperature sensor, 11-1 - fixing part, 11-2 - temperature sensor, 12 - heating strip, 13 - adjustable fixed clamp, 13-1 - fixed plate, 13-2 - bayonet, 13-3 - fixed hole, 14 - screw rod. DETAILED DESCRIPTION

[0022] The utility model will be further explained in connection with specific implementation, wherein, the drawing is only for example explanation, shows only the schematic diagram, and is not the real object drawing, can not be understood as the limitation of the utility model, in order to better explain the specific embodiment of the utility model, some components of the drawing will be omitted, enlarged or reduced, and does not represent the size of actual product, for the technical personnel in the art, some known structure and its explanation in the drawing can be omitted, it is understandable that all other specific embodiments obtained by the ordinary technical personnel in the art without making creative labor based on the specific embodiment in the utility model all belong to the scope of the utility model protection.

[0023] In the description of the utility model, it needs to explain, the term "front", "back", "up", "down" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a particular orientation, construct and operate in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the term "first", "second" is only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the utility model, it needs to explain, unless otherwise expressly provided and limited, the term "installation", "set with", "connection" and so on, should be broad understanding, for example "connection", can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] As Figures 1-6 The utility model discloses a low -cost automatic temperature control switch snow melting device, including indoor control area 1, local power supply box 4, track temperature sensor 11 and heating strip 12, be provided with control switch 2 and emergency switch 3 in indoor control area 1, be provided with alternating current contactor 9, temperature control module 5 and temperature control module contact 6 in local power supply box 4, control switch 2 connects the front contact of temperature control module 5, the middle contact of temperature control module 5 is connected to the control coil contact of alternating current contactor 9, and temperature control module 5 logic determines temperature control module contact 6 opening and closing, and control output opens and breaks, to realize automatic control mode further;Emergency switch 3 is directly connected to the control coil contact of alternating current contactor 9 of local power supply box 4, and control output opens and breaks, to realize manual emergency mode further. Indoor control area 220ACV power supply is connected to input terminal through local power supply box lead -in mouth, is used to power supply alternating current contactor 9, temperature control module contact 6 and temperature control module 5, three phase four wire system power supply is connected to input terminal row through cable and local power supply box lead -in mouth, is used to provide power supply for heating strip loop, and the output end of alternating current contactor 9 is connected to junction box 10, and one end of heating strip 12 leads out the wire and is connected to junction box 10 to constitute heating loop, and track temperature sensor 11 is connected with temperature control module 5 through junction box 10.

[0026] Local power supply box 4 is also provided with input circuit breaker 7 and output circuit breaker 8, one end of input circuit breaker 7 is connected with three phase four wire system power supply, the other end of input circuit breaker 7 is connected with alternating current contactor 9, three output circuit breakers 8 are respectively arranged on three output branch circuits of local power supply box 4, one end is connected with alternating current contactor 9, and the other end is connected with junction box 10.

[0027] The on-site power supply box has three output branch circuits which are connected to the junction box 10 through outlets, respectively providing power supply for three groups of switch heating strips. The three-phase four-wire power supply is the system power supply, located in the track section, and is used to provide power supply for the heating strip circuit. In the case of winter, the night sky window is manually closed, and the power supply is provided. In normal state (spring, summer and autumn), it is disconnected, and in winter, it is closed.

[0028] 220ACV power supply is the system control power supply, located in the signal machine room, used to power the AC contactor control coil and temperature control module in the on-site power supply box of the snow melting device system. In rainy and snowy weather operation, close control switch 2, remotely start the snow melting system, realize automatic temperature control heating of the rail, control switch 2 is normally open, and is closed when used; in the case of automatic temperature control function failure and other special circumstances, open control switch 2, close emergency switch 3, start the snow melting system, realize manual control heating of the rail, emergency switch 3 is normally open, and is closed in emergency.

[0029] The heating strip 12 is flat in cross section, installed inside the basic rail, and the contact surface between the heating strip 12 and the rail is a plane. The heating strip has different lengths, and the maximum heating power can reach 2600W. The installation position of the electric heating element is shown in Figure 4 The heating strip 12 is fixed to the lower part of the rail waist inside the basic rail through an adjustable fixing clamp 13, the adjustable fixing clamp 13 is made of an integrated forged cold end clamp and a stainless steel clamp, has three height adjustable holes, and adopts a screw rod to connect and fix the heating strip 12 to the rail waist. Specifically, as shown in Figure 5 The adjustable fixing clamp 13 includes a fixing plate 13-1 and a clamp hole 13-2 for clamping the heating strip, a plurality of fixing holes 13-3 are arranged on the fixing plate 13-1 in the vertical direction, and the fixing plate 13-1 is connected and fixed with the rail mounting hole through a screw rod 14.

[0030] As shown in Figure 6 The rail temperature sensor 11 includes a fixing member 11-1 and a temperature sensor 11-2, the temperature sensor 11-2 is installed at the bottom of the basic rail through the fixing member 11-1, and the temperature sensor 11-2 is connected with the temperature control module 5 through a three-core four-fluorine shielding wire through the junction box 10. The core part of the temperature sensor is made of thermistor material, the temperature sensing element can sense the temperature change of the rail, and convert it into a voltage signal, which is sent to the temperature control module. The measurement range is-70 to 300℃, and the accuracy level is ±0.8℃. The sensor protection shell is made of high-temperature resistant and corrosion resistant material to ensure the stability and durability of the sensor. The fixing member 11-1 includes a hook lock and a fastening screw, the middle part of the hook lock is provided with a clamping groove for fixing the temperature sensor, and the two ends of the hook lock are respectively provided with hook openings for hooking the bottom of the rail. One side of the hook opening is movably connected with the hook lock, and the hooking force of the hook lock is controlled by the fastening screw outside to ensure stability.

[0031] The terminal box 10 is composed of a shell and a terminal part, the shell is hot-pressed by SMC composite material, and the terminal part is connected with the external heating strip cable and the track temperature sensor transmission line to the local power supply box 4 by six-column ceramic terminals.

[0032] The working process of the utility model is as follows:

[0033] Power on the equipment: close the input circuit breaker of the local power supply box and the output circuit breaker of the three output branch circuits, close the indoor control switch, and power on the temperature control module and the front contact point of the temperature controller. Manually operate the temperature control module and set the upper and lower limit values of the temperature.

[0034] Automatic control mode: the track temperature sensor collects the temperature of the steel rail and transmits the temperature information to the temperature control module for logical judgment of the opening and closing of the contact point. When the monitored temperature is lower than the set lower limit value, the temperature control module contact is closed, the coil of the AC contactor is powered on, the movable contact is closed, the circuit is connected, the heating circuit is formed, and the heating strip quickly melts the ice and snow in the form of heat radiation and heat conduction. When the temperature reaches the set upper limit value, the temperature control module contact is disconnected, the coil of the AC contactor is powered off, the movable contact is disconnected, the heating circuit is cut off, and the heating strip stops working. In this way, the steel rail is intermittently heated, the ice and snow on the steel rail are melted, and precise temperature zone control is realized.

[0035] Manual emergency mode: when the temperature monitoring system fails, the control switch is opened, the indoor control area emergency switch is closed, the coil of the AC contactor is powered on, the movable contact is closed, the circuit is connected, the heating circuit is formed, the heating strip quickly melts the ice and snow in the form of heat radiation and heat conduction, and the uninterrupted heating function is realized.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A low-cost, self-regulating, snow-melting device for switches, characterized in that, The utility model relates to a kind of electric heating rail temperature control device, including indoor control area (1), local power supply box (4), track temperature sensor (11) and heating strip (12), control switch (2) and emergency switch (3) are provided in the indoor control area (1), AC contactor (9), temperature control module (5) and temperature control module contact (6) are provided in the local power supply box (4), control switch (2) is connected with the front contact of temperature control module (5), the middle contact of temperature control module (5) is connected to the control coil contact of AC contactor (9), emergency switch (3) is connected to the control coil contact of AC contactor (9), indoor control area 220ACV power supply is connected to input terminal through local power supply box lead-in, for AC contactor (9), temperature control module contact (6) and temperature control module (5) power supply, three-phase four-wire system power supply is connected to input terminal row through cable via local power supply box lead-in, for heating strip loop power supply, the output end of AC contactor (9) is connected to junction box (10), one end of heating strip (12) is connected to junction box (10) and constitutes heating loop, track temperature sensor (11) is connected with temperature control module (5) via junction box (10).

2. A low cost, automatically temperature controlled, switch de-icing device according to claim 1, characterized in that The local power supply box (4) is further provided with input circuit breaker (7) and output circuit breaker (8), one end of the input circuit breaker (7) is connected with the three-phase four-wire system power supply, the other end of the input circuit breaker (7) is connected with the AC contactor (9), the three output circuit breakers (8) are respectively arranged on the three output branch circuits of the local power supply box (4), one end is connected with the AC contactor (9), and the other end is connected with the junction box (10).

3. A low cost, automatically temperature controlled, switch de-icing device according to claim 1, characterized in that, The heating strip (12) is flat in cross section and is installed on the inside rail waist of the base rail.

4. A low cost, self-regulating, temperature controlled, switch de-icing device according to claim 1, wherein, The heating strip (12) is fixed to the lower part of the inside rail waist of the base rail by an adjustable fixing clamp (13), the adjustable fixing clamp (13) includes a fixing plate (13-1) and a bayonet (13-2) for clamping the heating strip, a plurality of fixing holes (13-3) are arranged on the fixing plate (13-1) in the vertical direction, and the fixing plate (13-1) is connected and fixed with the rail mounting hole by a screw rod (14).

5. A low cost, self-regulating, temperature controlled, switch de-icing device according to claim 1, wherein, The track temperature sensor (11) includes a fixing member (11-1) and a temperature sensor (11-2), the temperature sensor (11-2) is installed at the bottom of the base rail by the fixing member (11-1), and the temperature sensor (11-2) is connected with the temperature control module (5) through the junction box (10) by a three-core four-fluorine shielding wire.

6. A low cost, automatically temperature controlled, switch de-icing device according to claim 5, characterized in that The fixing member (11-1) includes a hook lock and a fastening screw, a clamping groove for fixing the temperature sensor is arranged in the middle of the hook lock, hook openings for hooking the bottom of the rail are arranged at both ends of the hook lock, and the hooking force of the hook lock is controlled by the outside fastening screw.

7. A low cost, self-regulating, temperature controlled, switch de-icing device according to claim 1, wherein, The junction box (10) is composed of a shell and a wiring part, the shell is formed by SMC composite material hot pressing, and the wiring part adopts six-column ceramic terminals to connect the external heating strip cable and the track temperature sensor transmission line to the local power supply box (4).

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