A frequency-selective grounding anti-interference device for an axle counting system

Abstract

The present invention provides a frequency-selective grounding and anti-interference device for an axle counting system, belonging to the technical field of axle counting equipment. The frequency-selective grounding and anti-interference device for an axle counting system comprises a foundation, a rail and an axle counting equipment. A plurality of first installation grooves are provided inside the foundation, and the foundation also comprises an interference suppressor, a fixing device and a connecting device. The present invention arranges the interference suppressor and the rail grounding. When the harmonic current of a train flows back to the rail and falls within the working frequency range of the axle counting equipment, the current enters the interference suppressor through the cable on the fixing device. By virtue of the characteristic of the interference suppressor passing through a specific frequency band, the harmonic current within the working frequency range of the axle counting equipment is discharged in advance through the ground wire, thereby reducing the interference of the interference current on the axle counting equipment, effectively avoiding the red light band phenomenon in the detection result of the axle counting equipment, and improving the detection accuracy of the axle counting equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of axle counting equipment, and in particular relates to a frequency-selective grounding anti-interference device for an axle counting system. Background Art

[0002] The axle counting system monitors and controls the occupancy status of the railway section by detecting the number of wheels, thereby improving transportation efficiency and ensuring driving safety. The axle counting system detects the number of wheels passing through through sensors installed on the rails, and transmits this information to the microcomputer system for processing. These sensors can be converted into electrical pulse signals, thereby achieving accurate counting of the number of wheels. The axle counting equipment is divided into two main parts: outdoor wheel sensors and indoor axle counting host.

[0003] The Chinese patent application number CN202311285245.9 discloses an electromagnetic interference filtering method, device and axle counter for an axle counter, which relates to the technical field of trackside equipment. The invention adds a signal filter to the side of the axle counter box on the trackside. Since there will be a transient current in the rail when electromagnetic interference occurs, the signal filter determines whether the voltage data collected by the axle counter magnetic head is caused by electromagnetic interference by collecting the time when the transient current occurs, and transmits the axle counter voltage data caused by electromagnetic interference to the axle counter indoor cabinet after filtering and processing, which effectively reduces the axle counter interference in the AC traction environment, improves the anti-interference ability of the axle counter in the AC traction environment of the urban railway, and thus improves the reliability of the signal system. However, when the train is over-powered and split, the current will be impacted, causing the train to generate a backflow harmonic current, and the harmonic current will still be large when it flows back to the rail. When the frequency of the harmonic current falls in the working frequency range of the axle counter, the magnetic field generated by the harmonic current on the rail will interfere with the operation of the axle counter and affect the accuracy of the axle counter detection.

[0004] Therefore, in order to solve the above problems, it is necessary to provide a frequency-selective grounding anti-interference device for an axle counting system. Summary of the invention

[0005] The purpose of the present invention is to provide a frequency-selective grounding anti-interference device for an axle counting system, aiming to solve the problem that when the harmonic current generated by the train during over-voltage phase separation flows back to the rail, the magnetic field generated by the harmonic current whose frequency falls within the working frequency range of the axle counting device will interfere with the operation of the axle counting device.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A frequency-selective grounding anti-interference device for an axle counting system, comprising a foundation, rails and an axle counting device, wherein a plurality of first installation grooves are provided inside the foundation, and further comprising:

[0008] An interference suppressor, which is arranged inside each of the first installation slots and is used to suppress harmonic currents generated by the train to prevent the harmonic currents from interfering with the axle counting device;

[0009] A connecting device, wherein the connecting device electrically connects two rails through a cable, and electrically connects one of the rails to the interference suppressor through the cable, and grounds the interference suppressor through the cable, so as to transfer the harmonic current on the rail to the ground;

[0010] A fixing device is arranged at the connection of each of the connecting devices, and the vibration generated by the rail can clamp and fix the connecting device.

[0011] Preferably, the fixing device includes a fixing part and a screw rod arranged on the fixing part, the outer wall of the screw rod is rotatably connected with a fixing sleeve, a receiving groove is opened inside the fixing part, an adjusting bin is fixedly connected with the inner bottom center of the receiving groove, a limiting ring is fixedly connected with the inner top of the receiving groove, the top of the adjusting bin is fixedly connected with one end of the screw rod, an extrusion part slidably connected with the receiving groove is arranged above the limiting ring, a through hole is opened at the top of the extrusion part, and the through hole is sleeved on the outer wall of the screw rod.

[0012] Preferably, a first limit rod is fixedly connected to the inner top of the adjusting chamber, a first piston plate is provided on the outer wall sealing sliding sleeve of the first limit rod, the outer wall of the first piston plate is slidably connected to the inner wall of the adjusting chamber, a movable box is fixedly connected to the bottom of the first piston plate, a plurality of equally spaced through grooves are provided on the outer side of the movable box, a movable part is provided inside the movable box, and a first elastic part is connected between the bottom of the movable part and the inner wall of the movable box.

[0013] Preferably, the inner wall at the top of the accommodating groove is provided with a plurality of evenly distributed first limit grooves, and the interior of each of the first limit grooves is slidably connected to a second limit rod fixedly connected to the extrusion piece, and a second elastic piece is connected between the bottom of the extrusion piece and the inner wall of the accommodating groove, and the second elastic piece is sleeved on the outer wall of the adjusting chamber.

[0014] Preferably, a plurality of evenly distributed first slide grooves are provided on the top of the regulating chamber, and each of the first slide grooves is sealed and slidably connected to a first connecting rod inside, the top end of each first connecting rod is fixedly connected to the bottom of the extrusion piece, and the bottom end of each first connecting rod is fixedly connected to the top of the first piston plate.

[0015] Preferably, the first piston plate divides the interior of the regulating chamber into a first chamber and a second chamber, the interior of the second chamber is filled with carbonated liquid, the second chamber is connected to the interior of the regulating chamber through a through groove, and a second limiting groove corresponding to the position of the movable part is provided at the bottom of the first limiting rod.

[0016] Preferably, the connecting device includes a connecting piece sleeved on the outer wall of each screw rod, each connecting piece is arranged between the corresponding fixing piece and the fixing sleeve, a second mounting groove is opened inside the connecting piece, and a movable plate is sealed and slidably connected inside the second mounting groove.

[0017] Preferably, the movable plate and the extrusion member are arranged opposite to each other, the movable plate is slidably mounted on the outer wall of the screw, a third elastic member is connected between the bottom of the movable plate and the inner wall of the second mounting groove, a connecting head is connected to one end of the connecting member, a connecting groove is provided inside the end of the connecting head away from the connecting member, and a second connecting rod is connected to the internal ball hinge of the connecting groove.

[0018] Preferably, a accommodating chamber is provided inside the connecting head, a second piston plate is slidably connected inside the accommodating chamber, a second sliding groove is provided on the side of the accommodating chamber close to the second connecting rod, a friction part fixedly connected to the second piston plate is sealingly and slidably connected inside the second sliding groove, and a fourth elastic part is connected between the side of the second piston plate away from the friction part and the inner wall of the accommodating chamber.

[0019] Preferably, the second piston plate divides the interior of the accommodating chamber into a third chamber and a fourth chamber, a guide groove is provided inside the connecting member, and the second mounting groove is connected to the fourth chamber through the guide groove.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention uses the setting of interference suppressor and rail grounding. When the train harmonic current flows back to the rail and falls within the working frequency range of the axle counter, the current enters the interference suppressor through the cable on the fixing device. The harmonic current within the working frequency range of the axle counter is discharged in advance through the ground wire by the characteristic of the interference suppressor passing a specific frequency band, further reducing the interference of the interference current on the axle counter, and effectively avoiding the red light band phenomenon in the detection result of the axle counter.

[0022] The present invention provides a fixing device. When a train approaches a fixing part, the vibration between the wheels of the train and the rails will be transmitted to the inside of the fixing part. The vibration causes one end of the first elastic part connected to the movable part to swing and stir the carbonated liquid in the second chamber, so that the carbonic acid in the carbonated liquid in the second chamber is decomposed, the pressure in the second chamber is increased, and the extrusion part is pushed to move, so that the extrusion part and the connecting part are in close contact. Thus, the connecting part is further fixed in advance through the cooperation between the extrusion part and the fixing sleeve. On the one hand, the vibration when the train passes by is prevented from causing secondary loosening of the already loosened connecting part. On the other hand, since the carbonated liquid in the second chamber needs a certain time to stabilize before the internal carbon dioxide can be dissolved back into the water, the already loosened connecting part can be clamped and fixed during this time period, so that the loosening of the connecting part can be prevented from affecting the transmission of the harmonic interference current.

[0023] The present invention provides a connecting device. When a train approaches a fixing part, vibration is transmitted to the inside of the fixing part, so that the carbonic acid in the carbonic acid liquid inside the second chamber is decomposed, the pressure inside the second chamber is increased, and the first piston plate is pushed to move in the direction of the screw inside the adjusting chamber, so that the extrusion member is in close contact with the corresponding movable plate, and the movable plate is squeezed to move inside the second mounting groove, and the gas inside the second mounting groove is squeezed into the fourth chamber. The pressure inside the fourth chamber increases, and the second piston plate is pushed to move inside the accommodating chamber, so that the friction member is freed from the restriction on the second connecting rod. The angle is adjusted by the movement of the second connecting rod inside the connecting groove, so that the hard pulling of the cable caused by the influence of the train speed can be prevented from directly causing bending damage to the connection between the cable and the connecting member, thereby improving the overall service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a structural distribution diagram of the cable of the present invention;

[0027] Figure 3 For the present invention Figure 2 A magnified view of the structure of the middle part A;

[0028] Figure 4 For the present invention Figure 2 A magnified view of the structure of the middle B section;

[0029] Figure 5 It is a structural schematic diagram of the interference suppressor of the present invention;

[0030] Figure 6 It is a schematic diagram of the overall structure of the fixing device of the present invention;

[0031] Figure 7 It is a schematic diagram of the internal structure of the fixing device of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the fixing member of the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure of the extrusion part of the present invention;

[0034] Fig.10 It is a structural schematic diagram of the movable box of the present invention;

[0035] Fig.11 It is a structural schematic diagram of the connection device of the present invention;

[0036] Fig.12 It is a schematic diagram of the internal structure of the second installation slot of the present invention;

[0037] Fig.13 For the present invention Fig.12 Enlarged view of the structure of section C.

[0038] In the figure: 1, foundation; 11, first mounting groove; 12, cable; 2, rail; 3, axle counting device; 4, interference suppressor; 5, fixing device; 51, fixing member; 52, screw; 53, fixing sleeve; 54, receiving groove; 55, adjusting chamber; 56, limiting ring; 57, extrusion member; 58, through hole; 59, first limiting rod; 510, first piston plate; 511, movable box; 512, through groove; 513, movable member; 514, first elastic member; 515, first limiting groove; 516, second limiting rod; 517, second Elastic member; 518, first slide groove; 519, first connecting rod; 520, first chamber; 521, second chamber; 522, second limiting groove; 6, connecting device; 61, connecting member; 62, second mounting groove; 63, movable plate; 64, third elastic member; 65, connecting head; 66, connecting groove; 67, second connecting rod; 68, accommodating chamber; 69, second piston plate; 610, second slide groove; 611, friction member; 612, fourth elastic member; 613, third chamber; 614, fourth chamber; 615, guide groove. DETAILED DESCRIPTION

[0039] 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.

[0040] Embodiment 1

[0041] When a train is over-energized and split, an impact current will occur, causing the train to generate a return harmonic current. When the harmonic current flows back to the rails, it is still large. When the frequency of the harmonic current falls within the operating frequency range of the axle counting device, the magnetic field generated by the harmonic current on the rails will interfere with the operation of the axle counting device.

[0042] See also Figures 1 to 4 The present invention provides the following technical solution: a frequency-selective grounding anti-interference device for an axle counting system, comprising a foundation 1, a rail 2 and an axle counting device 3, wherein a plurality of first installation grooves 11 are provided inside the foundation 1, and further comprising:

[0043] The interference suppressor 4 is arranged inside each first installation slot 11 and is used to suppress the interference of the harmonic current generated by the train on the axle counting device 3.

[0044] The fixing device 5 is arranged at the connection of each connecting device 6. The vibration generated by the rail 2 can clamp and fix the connecting device 6. The fixing device 5 includes a fixing piece 51 and a screw 52 arranged on the fixing piece 51. The outer wall of the screw 52 is rotatably connected with a fixing sleeve 53. The fixing sleeve 53 and the screw 52 are specifically threadedly connected.

[0045] The connecting device 6 electrically connects the two rails 2 through the cable 12, and electrically connects one of the rails 2 to the interference suppressor 4 through the cable 12, and grounds the interference suppressor 4 through the cable 12, so as to transfer the harmonic current on the rail 2 to the ground. The connecting device 6 includes a connecting piece 61 sleeved on the outer wall of each screw rod 52, and each connecting piece 61 is arranged between the corresponding fixing piece 51 and the fixing sleeve 53, and the rotating fixing sleeve 53 is used to push the connecting piece 61 to contact and fix with the fixing piece 51.

[0046] like Figure 3 and Figure 4 As shown, the two second connecting rods 67 corresponding to the rails 2 above each first installation slot 11 are electrically connected via a cable 12 .

[0047] like Figure 3 and Figure 4 As shown, one of the second connecting rods 67 on each interference suppressor 4 is electrically connected to one of the second connecting rods 67 above the corresponding first mounting slot 11 through a cable 12, and the other second connecting rod 67 on each interference suppressor 4 can be connected to the ground through the cable 12 for grounding.

[0048] The first installation slot 11 is arranged within one to two meters before and after the axle counting device 3 , so as to ensure that the interference suppressor 4 can effectively suppress the return harmonic current generated by the train and avoid interference with the axle counting device 3 .

[0049] The axle counter device 3 is a wheel sensor. The internal circuit of the wheel sensor is composed of a high-frequency active oscillator and a corresponding series of auxiliary circuits. The output of the circuit is also a power supply, which is powered by an external DC constant current source. When the wheel approaches the sensor, the ferromagnetic medium damping internal components of the wheel change the working state of the circuit and increase the terminal voltage at the output end of the circuit. The interference suppressor 4 mainly involves the absorption and suppression of transient interference, and can reduce the interference current by increasing the impedance of the ground loop connection. The axle counter device 3 and the interference suppressor 4 are both existing technologies and will not be repeated here.

[0050] In actual use, the harmonic current generated by the train during over-phase separation (train over-phase separation means that when a train enters another power supply section from one power supply section during operation on an electrified railway, it needs to pass through an area without electricity. This area is called power separation). When the harmonic current flows back to the rail 2 and falls within the working frequency range of the axle counting device 3, the current is transmitted to the cable 12 through the nearby fixing device 5, and is transmitted to the interference suppressor 4 through the cable 12. Due to the characteristic of the interference suppressor 4 passing a specific frequency band, the harmonic current within the working frequency range of the axle counting device 3 is discharged in advance through the ground wire, effectively avoiding the red light band phenomenon in the detection result of the axle counting device 3.

[0051] The present invention grounds the interference suppressor 4 and the rail 2. When the harmonic current of the train flows back to the rail and falls within the working frequency range of the axle counting device 3, the current enters the interference suppressor 4 through the cable 12 on the fixing device 5. By virtue of the characteristic of the interference suppressor 4 passing through a specific frequency band, the harmonic current within the working frequency range of the axle counting device 3 is discharged in advance through the ground wire, which can effectively avoid the red light band phenomenon in the detection result of the axle counting device 3, further reduce the interference of the interference current on the axle counting device, and improve the accuracy of the detection result of the axle counting device 3.

[0052] Embodiment 2

[0053] On the basis of the above-mentioned embodiment, during the running of the train, the train is affected by factors such as the train's own weight, speed, and friction between the wheels and rails, which leads to interaction between the wheels and rails and produces certain vibrations. The vibrations can loosen the connection between the cable, the guide rail, and the interference suppressor, resulting in the inability to effectively guide the harmonic interference current to the interference suppressor and the ground, which will still cause interference to the axle counting equipment.

[0054] See also Figures 5 to 10A receiving groove 54 is provided inside the fixing member 51, and an adjusting bin 55 is fixedly connected to the center of the inner bottom of the receiving groove 54, and a limiting ring 56 is fixedly connected to the inner top of the receiving groove 54. The top of the adjusting bin 55 is fixedly connected to one end of the screw rod 52, and an extrusion member 57 slidably connected to the receiving groove 54 is provided above the limiting ring 56. A through hole 58 is provided at the center of the extrusion member 57, and the through hole 58 is sleeved on the outer wall of the screw rod 52.

[0055] In the initial state, under the elastic pulling action of the second elastic member 517 , the top of the extrusion member 57 is kept flush with the top of the fixing member 51 , and the bottom of the extrusion member 57 is in contact with the top of the limiting ring 56 .

[0056] A first limiting rod 59 is fixedly connected to the inner top of the regulating chamber 55, and a first piston plate 510 is provided on the outer wall of the first limiting rod 59 in a sealing sliding sleeve. The outer wall of the first piston plate 510 is slidably connected to the inner wall of the regulating chamber 55, and a movable box 511 is fixedly connected to the bottom of the first piston plate 510. A plurality of equally spaced through grooves 512 are provided on the outer side of the movable box 511. A movable part 513 is provided inside the movable box 511. A first elastic part 514 is connected between the bottom of the movable part 513 and the inner wall of the movable box 511. The movable part 513 is hemispherically arranged, and the position of the movable part 513 corresponds to the position of the first limiting rod 59.

[0057] In the initial state, the bottom of the movable box 511 contacts the bottom inner wall of the adjustment chamber 55 , and there is a large space between the movable member 513 and the bottom of the first limiting rod 59 .

[0058] The inner wall at the top of the accommodating groove 54 is provided with a plurality of evenly distributed first limiting grooves 515, and each first limiting groove 515 is slidably connected to a second limiting rod 516 fixedly connected to the extrusion piece 57, and a second elastic piece 517 is connected between the bottom of the extrusion piece 57 and the inner wall of the accommodating groove 54. The second elastic piece 517 is sleeved on the outer wall of the adjusting chamber 55, so as to limit the distance that the extrusion piece 57 moves away from the adjusting chamber 55 through the first limiting groove 515.

[0059] A plurality of evenly distributed first slide grooves 518 are provided on the top of the regulating chamber 55, and each first slide groove 518 is sealed and slidably connected to a first connecting rod 519 inside, and the top end of each first connecting rod 519 is fixedly connected to the bottom of the extrusion member 57, and the bottom end of each first connecting rod 519 is fixedly connected to the top of the first piston plate 510.

[0060] The first piston plate 510 divides the interior of the regulating chamber 55 into a first chamber 520 and a second chamber 521. The second chamber 521 is filled with carbonated liquid. The second chamber 521 is connected to the interior of the regulating chamber 55 through the through groove 512. A second limiting groove 522 corresponding to the position of the movable part 513 is provided at the bottom of the first limiting rod 59.

[0061] Carbonated liquid refers to water dissolved with carbon dioxide, also known as carbonated water. When shaken, the carbonic acid will decompose into carbon dioxide and water, which can increase the pressure in a sealed space. This is existing technology and will not be elaborated on here.

[0062] It should be noted that rotating the fixing sleeve 53 can push the connecting member 61 to contact the fixing member 51 for clamping and fixing. After long-term use, the fixing sleeve 53 will be affected by the vibration between the train and the rail 2, causing the fixing of the fixing sleeve 53 to the connecting member 61 to become loose, affecting use. In actual use, when the train is traveling and is about to approach the fixing member 51, the vibration between the wheels of the train and the rail 2 will be transmitted to the inside of the fixing member 51. Since one end of the first elastic member 514 is fixed and the other end is movable, when the vibration is transmitted to the first elastic member 514 inside the fixing member 51, the vibration causes the first elastic member 514 to be connected to one end of the movable member 513 to swing and stir the carbonated liquid inside the second chamber 521, so that the carbonic acid in the carbonated liquid inside the second chamber 521 is decomposed, and the pressure inside the second chamber 521 is increased, which can push the first piston plate 510 to move in the direction of the screw 52 inside the regulating chamber 55, and drive the extrusion member 57 to move synchronously through the first connecting rod 519, and The second elastic member 517 is stretched so that the extrusion member 57 is in close contact with the connecting member 61, and the other side of the connecting member 61 is in close contact with the fixing sleeve 53. The fixing sleeve 53 can be laterally limited by the thread on the screw rod 52. Thus, the connecting member 61 is further fixed in advance through the cooperation between the extrusion member 57 and the fixing sleeve 53. On the one hand, the vibration caused by the passing of the train is prevented from causing secondary loosening of the already loose connecting member 61. On the other hand, the carbonated liquid inside the second chamber 521 needs a certain amount of time to stabilize before the carbon dioxide inside can be dissolved back into the water. During this period of time, the already loose connecting member 61 can be kept clamped and fixed, which can prevent the loosening of the connecting member 61 from affecting the transmission of the harmonic interference current.

[0063] It is further explained that the carbonated liquid inside the second chamber 521 needs a certain amount of time to stabilize before the carbon dioxide inside can be dissolved back into the water. When the first piston plate 510 moves toward the screw 52 inside the regulating chamber 55, it can drive the movable box 511 to move synchronously, so that the movable part 513 can enter the inside of the second limiting groove 522, and can squeeze the first elastic part 514 to limit the swing of the movable part 513, so as to ensure that the carbonated liquid inside the second chamber 521 remains stable. Since the train speed is relatively fast, the train can quickly pass through the fixing device 5 during the time when the carbonated liquid inside the second chamber 521 remains stable. At this time, when the harmonic current generated by the train falls within the working frequency range of the axle counting device 3, the cooperation of the extrusion piece 57 and the fixing sleeve 53 can prevent the connecting piece 61 from loosening, thereby reducing the influence on the transmission of the harmonic interference current. When the train does not generate harmonic current or the harmonic current does not fall within the working frequency range of the axle counting device 3, the cooperation of the extrusion piece 57 and the fixing sleeve 53 can prevent the vibration of the train from passing through and causing secondary loosening of the already loose connecting piece 61.

[0064] According to the present invention, by setting the fixing device 5, when the train approaches the fixing part 51, the vibration between the wheels of the train and the rails 2 will be transmitted to the inside of the fixing part 51, and the vibration causes the first elastic member 514 to swing and stir the carbonated liquid inside the second chamber 521 at one end connected to the movable member 513, so that the carbonic acid in the carbonated liquid inside the second chamber 521 is decomposed, the pressure inside the second chamber 521 is enhanced, and the extrusion member 57 is pushed to move, so that the extrusion member 57 is in close contact with the connecting member 61, thereby further fixing the connecting member 61 in advance through the cooperation between the extrusion member 57 and the fixing sleeve 53, on the one hand, preventing the vibration when the train passes by from causing secondary loosening of the already loose connecting member 61, and on the other hand, because the carbonated liquid inside the second chamber 521 needs a certain time to stabilize before the carbon dioxide inside can be dissolved back into the water, the already loose connecting member 61 can be clamped and fixed during this period of time, which can prevent the loosening of the connecting member 61 from affecting the transmission of harmonic interference current.

[0065] Embodiment 3

[0066] Based on the above embodiment, a high-speed train causes the air flow speed to increase, resulting in a decrease in pressure. The speed of the train causes the cable to be pulled, causing the cable to bend and be damaged at the connection with the connector when it is pulled hard, thus affecting its service life.

[0067] See also Fig.10 - Fig.13A second mounting groove 62 is provided inside the connecting member 61, and a movable plate 63 is sealed and slidably connected inside the second mounting groove 62. The movable plate 63 is arranged opposite to the extrusion member 57, and the movable plate 63 is slidably sleeved on the outer wall of the screw rod 52. A third elastic member 64 is connected between the bottom of the movable plate 63 and the inner wall of the second mounting groove 62. A connecting head 65 is connected to one end of the connecting member 61, and a connecting groove 66 is provided inside the end of the connecting head 65 away from the connecting member 61, and a second connecting rod 67 is ball-hinged inside the connecting groove 66.

[0068] A accommodating chamber 68 is provided inside the connecting head 65, and a second piston plate 69 is slidably connected inside the accommodating chamber 68. A second sliding groove 610 is provided on the side of the accommodating chamber 68 close to the second connecting rod 67. A friction member 611 fixedly connected to the second piston plate 69 is sealingly and slidably connected inside the second sliding groove 610. A fourth elastic member 612 is connected between the side of the second piston plate 69 away from the friction member 611 and the inner wall of the accommodating chamber 68. The second piston plate 69 divides the interior of the accommodating chamber 68 into a third chamber 613 and a fourth chamber 614. A guide groove 615 is provided inside the connection between the connecting member 61 and the connecting head 65, and the second mounting groove 62 is connected to the fourth chamber 614 through the guide groove 615.

[0069] like Fig.10 As shown, in the initial state, the fourth elastic member 612 is compressed to a certain extent, and the elastic force of the fourth elastic member 612 can be used to squeeze the friction member 611, so that the friction member 611 contacts the second connecting rod 67, thereby limiting the movement of the second connecting rod 67 in the connecting groove 66. The purpose is to avoid shaking of the connecting member 61 when installing the connecting member 61, which affects the connection of the connecting member 61 on the screw rod 52 and improves the installation efficiency.

[0070] like Fig.12 As shown, the friction member 611 is arranged in a wave shape on one side close to the second connecting rod 67 , the purpose of which is to enhance the surface roughness to increase the friction force between the friction member 611 and the second connecting rod 67 , thereby preventing the second connecting rod 67 from moving.

[0071] It should be noted that when the train is running and is about to approach the fixed part 51, the vibration will be transmitted to the inside of the fixed part 51, which can make the first elastic member 514 connected to one end of the movable member 513 to swing and stir the carbonated liquid in the second chamber 521, so that the carbonic acid in the carbonated liquid in the second chamber 521 is decomposed, and the pressure inside the second chamber 521 is enhanced, which can push the first piston plate 510 to move in the direction of the screw 52 inside the regulating chamber 55, and drive the extrusion member 57 to move synchronously through the first connecting rod 519, so that the extrusion member 57 is in close contact with the corresponding movable plate 63, and squeezes the movable plate 63 to move inside the second mounting groove 62, squeezing the third elastic member 6 4. The movement of the movable plate 63 can squeeze the gas inside the second installation groove 62 into the fourth chamber 614 through the guide groove 615. The pressure inside the fourth chamber 614 increases, pushing the second piston plate 69 to move inside the accommodating chamber 68, squeezing the fourth elastic member 612, and driving the friction member 611 to move in the second slide groove 610 in the direction away from the second connecting rod 67, so that the friction member 611 is freed from the restriction on the second connecting rod 67. Therefore, the second connecting rod 67 moves inside the connecting groove 66 to adjust the angle, thereby preventing the cable 12 from being directly bent and damaged at the connection between the cable 12 and the connecting member 61 due to the hard pulling caused by the influence of the train speed, thereby improving the overall service life.

[0072] When the friction member 611 moves to the extreme position inside the second slide groove 610 in the direction away from the second connecting rod 67, the end of the friction member 611 close to the second connecting rod 67 is still inside the second slide groove 610, preventing the gas inside the fourth chamber 614 from flowing to the outside through the second slide groove 610.

[0073] Furthermore, when installing the connecting member 61 , the staff can change the angle of the connecting member 61 by pressing the movable plate 63 to facilitate installation.

[0074] The present invention is provided with the connection device 6. When the train approaches the fixing part 51, the vibration will be transmitted to the inside of the fixing part 51, so that the carbonic acid in the carbonic acid liquid inside the second chamber 521 is decomposed, the pressure inside the second chamber 521 is enhanced, and the first piston plate 510 is pushed to move in the direction of the screw 52 inside the adjusting chamber 55, so that the extrusion member 57 is in close contact with the corresponding movable plate 63, and the movable plate 63 is squeezed to move inside the second mounting groove 62, and the gas inside the second mounting groove 62 is squeezed into the fourth chamber 614. The pressure inside the fourth chamber 614 increases, and the second piston plate 69 is pushed to move inside the accommodating chamber 68, so that the friction member 611 is freed from the restriction on the second connecting rod 67. Thus, the angle is adjusted by the movement of the second connecting rod 67 inside the connecting groove 66, so as to prevent the cable 12 from being directly bent and damaged at the connection between the cable 12 and the connecting member 61 due to the hard pulling caused by the influence of the train speed, thereby improving the overall service life.

[0075] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A frequency-selective grounding anti-interference device for an axle counting system, comprising a foundation (1), a rail (2) and an axle counting device (3), wherein a plurality of first installation grooves (11) are provided inside the foundation (1), and the device is characterized in that: Also includes: An interference suppressor (4), the interference suppressor (4) being arranged inside each of the first mounting slots (11) and being used to suppress harmonic currents generated by the train and prevent the harmonic currents from interfering with the axle counting device (3); A connecting device (6), wherein the connecting device (6) electrically connects the two rails (2) via a cable (12), and electrically connects one of the rails (2) to the interference suppressor (4) via the cable (12), and grounds the interference suppressor (4) via the cable (12), so as to transfer the harmonic current on the rail (2) to the ground; A fixing device (5), the fixing device (5) being arranged at the connection point of each of the connecting devices (6), and the vibration generated by the rail (2) can clamp and fix the connecting device (6); The fixing device (5) comprises a fixing member (51) and a screw rod (52) arranged on the fixing member (51); the outer wall of the screw rod (52) is rotatably connected to a fixing sleeve (53); a receiving groove (54) is provided inside the fixing member (51); an adjusting chamber (55) is fixedly connected to the center of the inner bottom of the receiving groove (54); a limiting ring (56) is fixedly connected to the inner top of the receiving groove (54); the top of the adjusting chamber (55) is fixedly connected to one end of the screw rod (52); an extrusion member (57) slidably connected to the receiving groove (54) is provided above the limiting ring (56); a through hole (58) is provided at the top of the extrusion member (57); and the through hole (58) is sleeved on the outer wall of the screw rod (52); A first limiting rod (59) is fixedly connected to the top of the inner side of the regulating chamber (55); a first piston plate (510) is provided in a sealing sliding sleeve on the outer wall of the first limiting rod (59); the outer wall of the first piston plate (510) is slidably connected to the inner wall of the regulating chamber (55); a movable box (511) is fixedly connected to the bottom of the first piston plate (510); a plurality of through grooves (512) distributed at equal intervals are provided on the outer side of the movable box (511); a movable part (513) is provided inside the movable box (511); a first elastic part (514) is connected between the bottom of the movable part (513) and the inner wall of the movable box (511); The inner wall at the top of the containing groove (54) is provided with a plurality of evenly distributed first limiting grooves (515), the interior of each of the first limiting grooves (515) is slidably connected to a second limiting rod (516) fixedly connected to the extrusion member (57), a second elastic member (517) is connected between the bottom of the extrusion member (57) and the inner wall of the containing groove (54), and the second elastic member (517) is sleeved on the outer wall of the regulating chamber (55); The top of the regulating chamber (55) is provided with a plurality of evenly distributed first slide grooves (518), the interior of each of the first slide grooves (518) is sealed and slidably connected to a first connecting rod (519), the top end of each of the first connecting rods (519) is fixedly connected to the bottom of the extrusion member (57), and the bottom end of each of the first connecting rods (519) is fixedly connected to the top of the first piston plate (510); The first piston plate (510) divides the interior of the regulating chamber (55) into a first chamber (520) and a second chamber (521); the interior of the second chamber (521) is filled with carbonated liquid; the second chamber (521) is connected to the interior of the regulating chamber (55) via a through groove (512); and a second limiting groove (522) corresponding to the position of the movable part (513) is formed at the bottom of the first limiting rod (59).

2. The frequency-selective grounding anti-interference device for an axle counting system according to claim 1, characterized in that: The connecting device (6) comprises a connecting piece (61) sleeved on the outer wall of each screw rod (52), each connecting piece (61) is arranged between the corresponding fixing piece (51) and the fixing sleeve (53), a second mounting groove (62) is provided inside the connecting piece (61), and a movable plate (63) is sealingly and slidably connected inside the second mounting groove (62).

3. The frequency-selective grounding anti-interference device for an axle counting system according to claim 2, characterized in that: The movable plate (63) and the extrusion member (57) are arranged opposite to each other. The movable plate (63) is slidably mounted on the outer wall of the screw rod (52). A third elastic member (64) is connected between the bottom of the movable plate (63) and the inner wall of the second mounting groove (62). A connecting head (65) is connected to one end of the connecting member (61). A connecting groove (66) is formed inside the end of the connecting head (65) away from the connecting member (61). A second connecting rod (67) is ball-hinged inside the connecting groove (66).

4. The frequency-selective grounding anti-interference device for an axle counting system according to claim 3, characterized in that: The connecting head (65) is provided with a receiving chamber (68) inside, and a second piston plate (69) is slidably connected inside the receiving chamber (68). A second sliding groove (610) is provided on a side of the receiving chamber (68) close to the second connecting rod (67). A friction member (611) fixedly connected to the second piston plate (69) is sealingly and slidably connected inside the second sliding groove (610). A fourth elastic member (612) is connected between a side of the second piston plate (69) away from the friction member (611) and an inner wall of the receiving chamber (68).

5. The frequency-selective grounding anti-interference device for an axle counting system according to claim 4, characterized in that: The second piston plate (69) divides the interior of the accommodating chamber (68) into a third chamber (613) and a fourth chamber (614); a guide groove (615) is provided inside the connecting member (61); and the second mounting groove (62) is connected to the fourth chamber (614) via the guide groove (615).

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