Track circuit receiving coil and track circuit receiving kit

Abstract

The utility model discloses a track circuit receiving coil and a track circuit receiving suite, belongs to the technical field of track circuit detection, and aims to solve the problem that an existing track circuit receiving coil is large in size and weight and inconvenient to carry for a long distance, the track circuit receiving coil (1) comprises an upper shell (11) and a lower clamping jaw (12) which are connected up and down, a magnetic core (13) and a metal coil (14) are arranged in the upper shell (11), the magnetic core (13) is sleeved with the metal coil (14), the weight of the track circuit receiving coil (1) ranges from 1 kg to 3 kg, and therefore the track circuit receiving coil (1) can be connected with a rail head (61) of a steel rail (6) in a matched and inserted mode. According to the track circuit receiving coil, miniaturization and light weight of the coil are achieved through structural optimization, and linearity and accuracy of track circuit signal receiving are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of track circuit detection, specifically is a track circuit receiving coil, and is a track circuit receiving kit. BACKGROUND

[0002] The track circuit is the equipment for checking the track position occupied by the train and transmitting the ground-vehicle information in the train operation control system, and is the key component of the modern railway signal system. The existing track circuit receiving coil is installed in front of the first wheel pair of the train, and is used for realizing the information transmission between the train signal equipment and the ground signal equipment, and ensuring the safety and efficiency of the train operation. The working principle is that the track circuit current signal transmitted in the rail is received through electromagnetic induction to generate an induced voltage signal with the same frequency characteristics, the signal is transmitted to the train host through the coil transmission cable for demodulation and decoding, and the control vehicle information contained in the signal is extracted to control the train operation safely.

[0003] The existing track circuit receiving coil is suitable for the receiving of the track circuit by the vehicle-mounted signal equipment, and has the following problems when the track circuit is tested manually on the ground: 1. The contradiction between the installation precision and the engineering adaptability is prominent. According to the "Locomotive Signal Vehicle-mounted System Equipment" (TB / T 3287-2013), the distance between the bottom surface of the coil and the rail surface is 155mm±5mm, and the distance between the center of the bottom surface of the coil and the longitudinal center line of the rail surface is not more than 5mm. The strict installation requirement needs a special support to install it above the rail, and the installation and debugging takes a long time, which brings great inconvenience to the site operation and reduces the work efficiency. 2. The engineering application bottleneck brought by the dual-redundancy architecture. In order to meet the dual-redundancy requirement of the vehicle-mounted signal system, the coil adopts a dual-redundancy receiving mode, which makes the volume and weight of the coil larger, and the weight of a single coil reaches 12kg, and a pair of coils are needed for field testing, and the total carrying load reaches 24kg, which is not convenient for long-distance carrying, especially in tunnels, bridges and other special sections, which is easy to cause muscle strain of the operation personnel. 3. Electromagnetic interference problem. In the field test process, affected by the uneven distribution of ballast, the position limitation of sleeper and the longitudinal fluctuation of rail surface and other complex environments, the installation size of the coil has a certain deviation, which further affects the precision of the induced voltage generated by the coil. In addition, the coil keeps a certain distance from the rail surface, and the signal is easily affected by electromagnetic interference and air medium loss, which further leads to the decline of the accuracy and linearity of the coil. The above comprehensive factors make the error of the receiving coil reach 7.5%, which seriously restricts the accuracy of the track circuit parameter measurement. UTILITY MODEL CONTENTS

[0004] In order to solve the problems of large volume and weight of the existing track circuit receiving coil and inconvenient long-distance transportation, the utility model provides a track circuit receiving coil and a track circuit receiving set, the track circuit receiving coil realizes coil miniaturization and light weight through structure optimization, and the linearity and accuracy of track circuit signal receiving are significantly improved.

[0005] The technical scheme adopted by the embodiment of the utility model to solve the technical problems is:

[0006] A track circuit receiving coil, the track circuit receiving coil includes an upper shell and a lower clamping jaw connected in sequence, a magnetic core and a metal coil are arranged in the upper shell, the metal coil is sleeved on the outside of the magnetic core, the lower clamping jaw contains a left clamping jaw and a right clamping jaw arranged at intervals, the weight of the track circuit receiving coil is 1kg-3kg, when the track circuit receiving coil is inserted into the rail head of the steel rail, the right side surface of the left clamping jaw can abut against the left side surface of the rail head, the left side surface of the right clamping jaw can abut against the right side surface of the rail head, and the lower surface of the upper shell between the left clamping jaw and the right clamping jaw can abut against the upper side surface of the rail head.

[0007] The length of the track circuit receiving coil is 150mm-300mm, the width of the track circuit receiving coil is 30mm-80mm, the height of the track circuit receiving coil is 40mm-100mm, the upper shell and the magnetic core are both in the shape of a long strip, and the length direction of the upper shell and the length direction of the magnetic core both extend along the left-right direction.

[0008] The upper shell contains an upper cavity, the magnetic core and the metal coil are both located in the upper cavity, and the upper cavity is filled with polyurethane foaming material.

[0009] The material of the magnetic core is manganese-zinc ferrite, the weight of the magnetic core is 0.2kg-0.5kg, and the nonlinear deviation of the magnetic permeability of the magnetic core is within ±1%.

[0010] The distance between the lower end surface of the metal coil and the lower surface of the upper shell is 15mm-20mm, the weight of the metal coil is 0.05kg-0.2kg, and the wire diameter of the metal coil is 0.5mm-1mm.

[0011] An external plug is arranged on the front surface or the rear surface of the upper shell, the external plug contains a first output terminal and a second output terminal, and the two ends of the magnetic core are electrically connected with the first output terminal and the second output terminal respectively.

[0012] The external plug is an aviation plug, the external plug further contains a third output terminal, the third output terminal is connected with the upper shell, and the material of the upper shell and the lower clamping jaw is engineering plastic, such as nylon.

[0013] The utility model discloses a track circuit receiving kit, the track circuit receiving kit includes a terminal box, two output cables and two track circuit receiving coils, is provided with first input connector, second input connector, output connector and impedance range conversion knob on the terminal box, is provided with impedance matching circuit module in the terminal box, and the first track circuit receiving coil can be connected with the first input connector through the first output cable, and the second track circuit receiving coil can be connected with the second input connector through the second output cable, and the output connector can output the induced voltage after the processing of impedance matching circuit module, and the impedance range conversion knob can make the receiving frequency of track circuit receiving coil correspond with impedance matching circuit module.

[0014] The first input connector, the second input connector and the output connector are all aviation plugs, the first end of the first track circuit receiving coil and the first end of the second track circuit receiving coil are connected to the same end, the second end of the first track circuit receiving coil is electrically connected to the first test terminal of the output connector through the first output cable, the second end of the second track circuit receiving coil is electrically connected to the input end of the impedance matching circuit module through the second output cable, and the output end of the impedance matching circuit module is electrically connected to the second test terminal of the output connector.

[0015] The track circuit receiving kit further comprises a short circuit line, a track circuit code emitting device and a multimeter, the short circuit line can short circuit connect two rails, the track circuit code emitting device can emit currents of multiple frequencies to the two rails, and the two detection terminals of the multimeter can be connected to the first test terminal and the second test terminal one by one.

[0016] The utility model discloses a track circuit receiving kit, the track circuit receiving kit includes a terminal box, two output cables and two track circuit receiving coils, is provided with first input connector, second input connector, output connector and impedance range conversion knob on the terminal box, is provided with impedance matching circuit module in the terminal box, and the first track circuit receiving coil can be connected with the first input connector through the first output cable, and the second track circuit receiving coil can be connected with the second input connector through the second output cable, and the output connector can output the induced voltage after the processing of impedance matching circuit module, and the impedance range conversion knob can make the receiving frequency of track circuit receiving coil correspond with impedance matching circuit module.

[0017] The track circuit receiving coil realizes the miniaturization and light weight of the coil through structural optimization, and the linearity and accuracy of track circuit signal receiving are significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application serve to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model.

[0019] Figure 1 It is the three-dimensional schematic view of the track circuit receiving coil of the utility model.

[0020] Figure 2 It is the cross-sectional schematic view of the track circuit receiving coil of the utility model.

[0021] Figure 3 is a front perspective view of the terminal box.

[0022] Figure 4 is a rear view of the terminal box.

[0023] Figure 5 is a schematic view of the track circuit receiving kit after connection.

[0024] Figure 6 is a schematic view of the working state of the track circuit receiving kit.

[0025] Figure 7 is a schematic view of the steel rail.

[0026] The reference signs are explained as follows:

[0027] 1, track circuit receiving coil; 2, terminal box; 3, output cable; 4, short circuit line; 5, track circuit code generating device; 6, steel rail; 7, multimeter;

[0028] 11, upper shell; 12, lower clamping jaw; 13, magnetic core; 14, metal coil; 15, external plug; 16, plug-in groove;

[0029] 21, first input terminal; 22, second input terminal; 23, output terminal; 24, impedance gear shift knob; 25, impedance matching circuit module;

[0030] 61, rail head;

[0031] 111, lower surface; 112, upper cavity;

[0032] 121, left clamping jaw; 122, right clamping jaw;

[0033] 141, lower end face;

[0034] 151, first output terminal; 152, second output terminal; 153, third output terminal;

[0035] 231, first test terminal; 232, second test terminal; 233, third test terminal. DETAILED DESCRIPTION

[0036] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] For the convenience of understanding and description, absolute positional relationships are adopted in the following description of the present application, and without special instructions, the orientation word "upper" in the description represents Figure 2The orientation term "up" represents the upward direction in the figure Figure 2 The orientation term "left" represents the leftward direction in the figure Figure 2 The orientation term "right" represents the rightward direction in the figure Figure 2 The orientation term "front" represents the direction perpendicular to Figure 2 The orientation term "back" represents the direction perpendicular to Figure 2 The paper plane and points to the paper plane inside the direction. The utility model adopts the observation visual angle of the reader or the user to carry out the description, but the above-mentioned orientation term cannot be understood or explained as the limitation to the protection scope of the utility model. As for the size, angle and parameter of the middle part, the person skilled in the art can determine or replace according to the actual need or limited times test.

[0038] As shown in Figure 1 And Figure 2 The utility model discloses a track circuit receiving coil, the track circuit receiving coil 1 includes the upper shell 11 and the lower clamping jaw 12 that connect up and down, is provided with the magnetic core 13 and the metal coil 14 in the upper shell 11, the metal coil 14 is set up in the magnetic core 13 outside, the lower clamping jaw 12 contains left jaw 121 and right jaw 122 that are arranged at intervals left and right, the upper shell 11, left jaw 121 and right jaw 122 are connected and form the plug-in recess 16 of the open downward, the weight of the track circuit receiving coil 1 is 1kg~3kg, when the plug-in recess 16 of the track circuit receiving coil 1 is inserted in the rail head 61 of the steel rail 6, the right side surface of left jaw 121 can abut with the left side surface of the rail head 61, the left side surface of right jaw 122 can abut with the right side surface of the rail head 61, the lower surface 111 of the upper shell 11 between left jaw 121 and right jaw 122 can abut with the upside of the rail head 61, thereby realizing the track circuit receiving coil 1 and the rail head 61 matching plug-in of the steel rail 6.

[0039] The length of the track circuit receiving coil 1 can be 150mm~300mm, the width of the track circuit receiving coil 1 can be 30mm~80mm, the height of the track circuit receiving coil 1 can be 40mm~100mm. Specifically, the external dimensions of the track circuit receiving coil 1 are not more than 250mm*50mm*60mm, the weight is not more than 2kg, the volume is reduced by 6 times, the weight is reduced by 4 times, which is convenient for long-distance carrying on site, light weight, and meets the requirements of dustproof, waterproof and shockproof.

[0040] The track circuit receiving coil adopts clamping mechanism design, built-in impedance matching circuit, and provides a receiving coil suitable for track circuit on-site manual test, which solves the problems of large on-site test result error, complex installation and debugging, and inconvenience for long-distance carrying.

[0041] As shown in Figure 1 and Figure 2 , the upper shell 11 and the magnetic core 13 are both in long strip structure, the length direction of the upper shell 11 and the length direction of the magnetic core 13 both extend along the left-right direction, and the left and right clamping jaws 121 and 122 both extend along the up-down direction. The upper shell 11 contains an upper cavity 112, and the magnetic core 13 and the metal coil 14 are both located in the upper cavity 112, and the upper cavity 112 is filled with polyurethane foaming material.

[0042] The material of the magnetic core 13 is the existing manganese-zinc ferrite with good magnetic permeability linearity at 1000Hz-3000Hz, the weight of the magnetic core 13 is 0.2kg-0.5kg, and the non-linear deviation of the magnetic permeability of the magnetic core 13 is within ±1%. The magnetic core 13 can meet the linear relationship between the track circuit current signal and the receiving coil induced voltage at 1700Hz, 2000Hz, 2300Hz and 2600Hz, and ensures the stability of the measurement result. The distance D between the lower end surface 141 of the metal coil 14 and the lower surface 111 of the upper shell 11 is 15mm-20mm, the weight of the metal coil 14 is 0.05kg-0.2kg, and the wire diameter of the metal coil 14 is 0.5mm-1mm.

[0043] The track circuit receiving coil 1 adopts a miniaturized coil layout, uses a single coil, and optimizes the structural design. The following induction voltage signal output cable 3 and coil separation design is adopted, the cable length is greater than the rail spacing, and after the track circuit receiving coil 1 is clamped and fixed with the rail head 61 of the rail 6, the installation spacing and error of the traditional receiving coil can be eliminated. The contact type induction design is simple to install and reduces signal attenuation.

[0044] As shown in Figure 1 , Figure 2 and Figure 5 , an external plug 15 is arranged on the front surface or the rear surface of the upper shell 11, the external plug 15 contains a first output terminal 151 and a second output terminal 152, and the two ends of the magnetic core 13 are respectively electrically connected with the first output terminal 151 and the second output terminal 152.

[0045] Preferably, the external plug 15 is a 3-core aviation plug, and in particular, the external plug 15 is a 3-core aviation male plug. When in use, the 3-core aviation plug is connected, and the assembled design is convenient to carry. The external plug 15 also contains a third output terminal 153, the third output terminal 153 is connected with the upper shell 11, and the third output terminal 153 can also be called a ground terminal. The materials of the upper shell 11 and the lower clamping jaw 12 are both engineering plastics, such as nylon.

[0046] Next, a track circuit receiving kit is introduced, as shown in Figures 1 to 5As shown, the track circuit receiving kit comprises a junction box 2, two output cables 3 and two track circuit receiving coils 1, the junction box 2 is provided with a first input connector 21, a second input connector 22, an output connector 23 and an impedance range conversion knob 24, the junction box 2 is provided with an impedance matching circuit module 25, the first track circuit receiving coil 1 can be connected with the first input connector 21 through the first output cable 3, the second track circuit receiving coil 1 can be connected with the second input connector 22 through the second output cable 3, the first track circuit receiving coil 1 can send the received induced voltage to the junction box 2, the second track circuit receiving coil 1 can also send the received induced voltage to the junction box 2, the output connector 23 can output the induced voltage processed by the impedance matching circuit module 25, and the impedance range conversion knob 24 can make the receiving frequency of the track circuit receiving coil 1 correspond to the impedance matching circuit module 25.

[0047] The first input connector 21, the second input connector 22 and the output connector 23 are all aviation plugs, especially the first input connector 21, the second input connector 22 and the output connector 23 are all 3-core aviation male plugs. In use, the external plug 15 of the first track circuit receiving coil 1 is connected with the first input connector 21 of the junction box 2 through the first output cable 3, and the external plug 15 of the second track circuit receiving coil 1 is connected with the second input connector 22 of the junction box 2 through the second output cable 3.

[0048] Specifically, as shown in the figure, Figure 5 The first end of the first track circuit receiving coil 1 and the first end of the second track circuit receiving coil 1 are connected with the same end, the second end of the first track circuit receiving coil 1 is electrically connected with the first test terminal 231 of the output connector 23 through the first output cable 3, the second end of the second track circuit receiving coil 1 is electrically connected with the input end of the impedance matching circuit module 25 through the second output cable 3, the output end of the impedance matching circuit module 25 is electrically connected with the second test terminal 232 of the output connector 23, and the third output terminal 153 of the two track circuit receiving coils 1 are all electrically connected with the third test terminal 233 of the output connector 23.

[0049] The impedance matching circuit module 25 can adopt an existing impedance matching circuit, and the impedance matching circuit module 25 contains a potentiometer, which can adapt the coil output impedance by fine-tuning the resistance value of the potentiometer, so that the accuracy of the output induced voltage is controlled within 0.5%, which is improved by 15 times.

[0050] As shown in the figure, Figure 6 And Figure 7As shown, the track circuit receiving kit further comprises a short circuit line 4 capable of short-circuiting the two steel rails 6, a track circuit code emitting device 5 capable of emitting current signals of multiple frequencies to the two steel rails 6, for example, the track circuit code emitting device 5 is capable of emitting current signals of 1700Hz, 2000Hz, 2300Hz or 2600Hz to the two steel rails 6, and a multimeter 7. Two detection terminals of the multimeter 7 can be connected to the first test terminal 231 and the second test terminal 232 one by one, so as to test the induced voltage between the first test terminal 231 and the second test terminal 232.

[0051] The functions of the track circuit receiving coil and the components in the track circuit receiving kit are as follows:

[0052] 1. Track circuit module

[0053] The track circuit module contains the steel rails 6 and the short circuit line 4 connected in sequence, the two steel rails 6 are arranged left and right with a space, and both of them extend in the front and back direction. The module transmits track circuit current signals of 1700Hz, 2000Hz, 2300Hz and 2600Hz to the track circuit receiving coil 1 through the steel rails, for the track circuit receiving coil to receive inductively.

[0054] 2. Receiving coil module

[0055] That is, the track circuit receiving coil 1, which can be matched and plugged with the rail head 61 of the steel rail 6, uses a manganese-zinc ferrite bar as the magnetic core 13 to inductively generate a voltage signal from the track circuit current signal in the steel rail 6.

[0056] 3. Output cable module

[0057] That is, the output cable 3, which connects the left and right track circuit receiving coils 1 with the junction box 2 through a 3-core aviation plug, so that the inductive voltage signal generated by the track circuit receiving coil 1 is transmitted to the junction box 2 for voltage adaptation.

[0058] 4. Junction box module

[0059] That is, the junction box 2, which connects the like terminals of the left and right track circuit receiving coils 1, and the other end is respectively output, adjusts the inductive voltage signals of 1700Hz, 2000Hz, 2300Hz and 2600Hz through an impedance matching circuit, so that the output inductive voltage error is controlled within 0.5%, and the corresponding frequency is selected for output through a knob switch.

[0060] 5. Multimeter module

[0061] That is, the two detection terminals of the multimeter 7 can be connected with the first test terminal 231 and the second test terminal 232 one by one, and the module can accurately display the induced voltage of the terminal box after fine adjustment to the operator.

[0062] As shown in Figure 6 The following introduces the field manual measurement operation steps of the track circuit receiving coil and the track circuit receiving kit as follows:

[0063] Step 1, taking the connection between the track circuit code emitting device 5 and the steel rail 6 as the starting point, arranging the short circuit line 4 of the steel rail 6 at 4m in front of the connection.

[0064] Step 2, installing two left and right track circuit receiving coils 1 on the rail head 61 of the steel rail 6 at 1.5m in the direction of the short circuit line 4 towards the track circuit code emitting device 5.

[0065] Step 3, connecting the two track circuit receiving coils 1 with the terminal box 2 using the output cable 3, connecting the output connector 23 of the terminal box 2 with the multimeter 7; that is, connecting the external connector 15 of the first track circuit receiving coil 1 with the first input connector 21 of the terminal box 2 through the first output cable 3, connecting the external connector 15 of the second track circuit receiving coil 1 with the second input connector 22 of the terminal box 2 through the second output cable 3, and the two detection terminals of the multimeter 7 can be connected with the first test terminal 231 and the second test terminal 232 one by one.

[0066] Step 4, connecting the multimeter 7 with the power supply and turning it on, and selecting the AC voltage test mode.

[0067] Step 5, rotating the impedance position conversion knob 24 on the terminal box according to the frequency of the track circuit at the current position, the impedance position conversion knob 24 corresponding to the same frequency as the frequency emitted by the track circuit code emitting device 5, and the impedance position conversion knob 24 corresponding to the frequency value of 1700Hz, 2000Hz, 2300Hz or 2600Hz;

[0068] Step 6, observing the frequency and voltage readings of the multimeter 7 and recording the readings of the multimeter 7 at this time;

[0069] Step 7, repeating the above steps 1 to 6 in turn to complete the test of the track circuit with four frequencies (i.e. 1700Hz, 2000Hz, 2300Hz and 2600Hz);

[0070] For example, the first time the track circuit code emitting device 5 is tested at a frequency of 1700 Hz, the reading of the multimeter 7 at this time; the second time the track circuit code emitting device 5 is tested at a frequency of 2000 Hz, the reading of the multimeter 7 at this time; the third time the track circuit code emitting device 5 is tested at a frequency of 2300 Hz, the reading of the multimeter 7 at this time; the fourth time the track circuit code emitting device 5 is tested at a frequency of 2600 Hz, the reading of the multimeter 7 at this time;

[0071] Step 8, after the test is completed, turn off the multimeter 7, disconnect the power supply, remove the two track circuit receiving coils from the steel rail 6, clean up the tools on site, and the on-site track circuit test work is completed.

[0072] The above is only a specific embodiment of the present application, which cannot limit the scope of the application. Therefore, the replacement of equivalent components or equivalent changes and modifications made within the scope of the present application should still fall within the scope of the present application. In addition, the technical features in the present application can be freely combined with each other, and the technical features can be freely combined with each other.

Claims

1. A track circuit receiver coil, characterized in that The track circuit receiving coil (1) includes an upper shell (11) and a lower clamping jaw (12) connected in sequence, the upper shell (11) is internally provided with a magnetic core (13) and a metal coil (14), the metal coil (14) is sleeved outside the magnetic core (13), the lower clamping jaw (12) contains a left clamping jaw (121) and a right clamping jaw (122) arranged at intervals, the weight of the track circuit receiving coil (1) is 1-3 kg, when the track circuit receiving coil (1) is inserted into the rail head (61) of the steel rail (6), the right side surface of the left clamping jaw (121) can abut against the left side surface of the rail head (61), the left side surface of the right clamping jaw (122) can abut against the right side surface of the rail head (61), and the lower surface (111) of the upper shell (11) between the left clamping jaw (121) and the right clamping jaw (122) can abut against the upper side surface of the rail head (61).

2. The track circuit receiver coil according to claim 1, characterized in that The length of the track circuit receiving coil (1) is 150-300 mm, the width of the track circuit receiving coil (1) is 30-80 mm, the height of the track circuit receiving coil (1) is 40-100 mm, the upper shell (11) and the magnetic core (13) are both in a long strip structure, and the length direction of the upper shell (11) and the length direction of the magnetic core (13) both extend along the left-right direction.

3. The track circuit receiver coil according to claim 1, characterized in that, The upper shell (11) contains an upper cavity (112), and the magnetic core (13) and the metal coil (14) are both located in the upper cavity (112), and the upper cavity (112) is filled with polyurethane foaming material.

4. The track circuit receiver coil according to claim 1, characterized in that, The material of the magnetic core (13) is manganese-zinc ferrite, the weight of the magnetic core (13) is 0.2-0.5 kg, and the nonlinear deviation of the magnetic permeability of the magnetic core (13) is within ±1%.

5. The track circuit receiver coil according to claim 1, characterized in that, The distance between the lower end surface (141) of the metal coil (14) and the lower surface (111) of the upper shell (11) is 15-20 mm, the weight of the metal coil (14) is 0.05-0.2 kg, and the wire diameter of the metal coil (14) is 0.5-1 mm.

6. The track circuit receiver coil according to claim 1, characterized in that An external plug (15) is arranged on the front surface or the rear surface of the upper shell (11), the external plug (15) contains a first output terminal (151) and a second output terminal (152), and the two ends of the magnetic core (13) are electrically connected with the first output terminal (151) and the second output terminal (152) respectively.

7. The track circuit receiver coil according to claim 6, characterized in that The external plug (15) is an aviation plug, the external plug (15) further contains a third output terminal (153), the third output terminal (153) is connected with the upper shell (11), and the materials of the upper shell (11) and the lower clamping jaw (12) are both engineering plastics.

8. A rail circuit receiving kit, characterized in that The track circuit receiving kit comprises a junction box (2), two output cables (3) and two track circuit receiving coils (1) according to claim 1, the junction box (2) is provided with a first input connector (21), a second input connector (22), an output connector (23) and an impedance range conversion knob (24), the junction box (2) is provided with an impedance matching circuit module (25) inside, the first track circuit receiving coil (1) can be connected with the first input connector (21) through the first output cable (3), the second track circuit receiving coil (1) can be connected with the second input connector (22) through the second output cable (3), the output connector (23) can output the induced voltage processed by the impedance matching circuit module (25), and the impedance range conversion knob (24) can make the receiving frequency of the track circuit receiving coil (1) correspond to the impedance matching circuit module (25).

9. The rail circuit receiving kit according to claim 8, characterized in that, The first input connector (21), the second input connector (22) and the output connector (23) are all aviation connectors, the first end of the first track circuit receiving coil (1) and the first end of the second track circuit receiving coil (1) are connected with the same end, the second end of the first track circuit receiving coil (1) is electrically connected with the first test terminal (231) of the output connector (23) through the first output cable (3), the second end of the second track circuit receiving coil (1) is electrically connected with the input end of the impedance matching circuit module (25) through the second output cable (3), and the output end of the impedance matching circuit module (25) is electrically connected with the second test terminal (232) of the output connector (23).

10. The rail circuit receiving kit of claim 8, wherein, The track circuit receiving kit further comprises a short circuit line (4), track circuit code emitting equipment (5) and a multimeter (7), the short circuit line (4) can short circuit the two rails (6), the track circuit code emitting equipment (5) can emit currents with multiple frequencies to the two rails (6), and the two detection terminals of the multimeter (7) can be connected with the first test terminal (231) and the second test terminal (232) one by one.

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