Railway contact network positioning device and state monitoring method thereof

Abstract

The present invention belongs to the technical field of track devices, and relates to a railway contact network positioning device and a state monitoring method thereof, wherein the seat body of the positioning support is formed with two vertical arms that can match the right end side of the elastic limit positioning arm, and a vertical arm close to the inner side is provided with a frame, a cylinder, a connecting seat and a sensor unit to match the inner position of the end of the elastic limit positioning arm, and the other vertical arm matches the end. The upper part of the connecting seat is directly fixedly connected to the vertical arm, and a suspension rod is formed at the lower part, and a spring 2 is sleeved on the suspension rod. The connecting seat is connected to the frame through the suspension rod and the spring 2 to form a damping connection structure. The inner side of the end is sleeved in the cylinder and is limited to a height position that meets the use requirements by the frame. The sensor unit is arranged on the upper part of the frame and can detect the offset of the upper part of the spring 2. The present invention has the functions of suppressing the positioning device from being excessively lifted and ensuring current collection, stabilizing the oscillation of the contact line, suppressing the occurrence of offline accidents and improving early warning support.

Description

Technical Field

[0001] The invention relates to the technical field of trackside devices arranged along railway tracks, and in particular to a railway contact network positioning device and a state monitoring method thereof. Background Art

[0002] In the contact network system of electrified railways, the contact wire and the load-bearing cable will sag under the influence of their own weight, which can easily make the contact with the pantograph unstable and affect the current collection. Therefore, a wrist-arm type positioning device is usually used to support the contact wire and the load-bearing cable to keep them in a horizontal state to ensure that the locomotive can receive current stably. In the wrist-arm structure involved in the prior art, the wrist-arm positioning device is a split triangular support structure, and the part supporting the contact wire includes a horizontal wrist arm, an oblique wrist arm, and a horizontal positioning tube with one end configured on the oblique wrist arm. One end of the oblique wrist arm is connected with the middle part of the horizontal wrist arm, and the other end of the oblique wrist arm and the end of the horizontal wrist arm close to the other end are connected with a fixed support / bracket to form a triangular support structure. The other end of the horizontal positioning tube extends toward the side away from the oblique wrist arm, and a positioning support is fixedly connected to the middle part of the horizontal positioning tube, and an elastic limit positioning arm or a limit positioning arm / limit positioning seat is fixedly connected to the positioning support. The free end of the elastic limit positioning arm is extended toward the end where the horizontal positioning tube is connected to the oblique wrist arm, and a positioning wire clamp is fixedly arranged at the free end of the elastic limit positioning arm. The contact wire matches the positioning wire clamp to realize the support and positioning of the contact wire.

[0003] When the train is running, in order to ensure good contact between the contact wire and the pantograph, the pantograph will continue to apply an upward lifting force on the contact wire. As a result, there is inevitably a lifting force exerted by the pantograph on the contact wire, which will produce a counter-mechanical effect on the contact suspension mechanism of the railway contact network system, such as the wrist arm positioning device. When the pantograph passes through the positioning contact point, the height position of the suspension structure such as the positioning wire clamp on the positioning device and the free end of the elastic limit positioning arm will be raised accordingly, causing up and down fluctuations. The greater the lifting amount of the positioning device / the greater the fluctuation amplitude, the greater the possibility of a bow collision.

[0004] The lifting force of the pantograph is affected by factors such as the jump amplitude of the contact line, the characteristics of the contact suspension (positioning) device, the train running line conditions and the running speed. When the train runs at high speed, the height position of the pantograph will change rapidly and frequently, generating a large inertial force, and after combining with the superimposed aerodynamic force, the lifting force on the pantograph will be significantly increased, which can easily cause the arm positioning device / positioner to be over-lifted, causing a bow collision accident. Therefore, it is necessary to optimize and improve the positioning device of the contact line to better suppress the excessive lifting of the positioning device. In addition, when the train is running at high speed, the self-oscillation and jumping phenomenon generated by the contact line will cause the pantograph to be temporarily offline, causing the damage to the contact line and the pantograph slide plate to increase, and the degree of wear will deteriorate rapidly, affecting the stable and safe operation of the train. It is also urgent to optimize the railway contact line / contact network positioning device to suppress the self-oscillation degree of the contact line, as well as the jump amplitude and frequency, so as to effectively prevent the pantograph from being offline due to contact line turbulence. Summary of the invention

[0005] The purpose of the present invention is to provide a railway contact network positioning device and a state monitoring method thereof, which not only has the function of suppressing excessive lifting of the contact line and ensuring stable current collection of the pantograph, but also can stabilize the oscillation state of the contact line and effectively prevent offline accidents. It can also monitor the fixed state of the contact line in real time and provide early warning support.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a railway contact network positioning device, including a horizontal positioning tube, an elastic limit positioning arm, a positioning wire clamp arranged at the free end of the elastic limit positioning arm, a positioning support with an upper end connected to the horizontal positioning tube and a lower end connected to the end of the right end side of the elastic limit positioning arm, as well as a frame, a cylinder, a connecting seat and a sensor unit.

[0007] A hoop is formed on the upper part of the seat body of the positioning support, and the upper part of the positioning support is fixedly connected to the horizontal positioning tube through the hoop. The lower part of the seat body extends obliquely downward and is matched and connected with the end of the elastic limit positioning arm, so that the elastic limit positioning arm can be stably suspended to support and position the contact line.

[0008] The seat body of the positioning support is formed with a first vertical arm and a second vertical arm which are opposite to each other on the left and right sides. The second vertical arm is relatively located on the right side of the first vertical arm and the lower end of the second vertical arm extends downwards by a certain length relative to the lower end of the first vertical arm.

[0009] The frame includes a pair of front and rear facing vertical plates and a top plate connecting the upper ends of the two vertical plates, so that the frame is formed into a U shape as a whole, and the open end faces downward. At least one through hole portion with an axis in the vertical direction is formed on the top plate. A plurality of grooves arranged alternately in front and back are formed on the upper end surface of the top plate, and the grooves are extended and penetrated in the left and right directions.

[0010] The cylinder is placed between the opposite surfaces of the two vertical boards, and can selectively move up and down in the interval between the opposite surfaces of the two vertical boards and be fixed relative to the frame or the vertical boards. The end of the elastic limiting positioning arm passes through the cylinder cavity of the cylinder and is fixedly matched with the second vertical arm.

[0011] The connecting seat includes a plate part 1 and a plate part 2 which are opposite to each other in the upper and lower parts, and the plate part 1 is fixedly connected to the lower end surface of the first vertical arm. The lower end surface of the plate part 2 is formed with at least one suspension rod whose axis extends downward along the vertical direction, and a plurality of curved panels corresponding to and matching the grooves on the top plate. The lower convex curved surface of the curved panel can extend into the corresponding groove, and a vertical spacing is formed between the lowest end of the curved panel and the inner bottom surface of the groove. An elastic body can be arranged in the groove, and after the curved panel is extended into the groove, at least part of the arc surface of the lower end of the curved panel can contact the elastic body, so the upper end surface of the arranged elastic body is in a state of being retracted downward relative to the upper end of the groove.

[0012] The sensing unit includes an outer cylinder, an inner cylinder fixed at the upper end of the outer cylinder, and a plurality of sensor bodies fixed on the inner cylinder. The sensitive element parts of each sensor body are alternately distributed around the circumference and fixed on the inner circumference of the inner cylinder. At least the sensitive element parts are arranged on the inner circumference of the inner cylinder and on the left and right sides. The outer cylinder is fixed at the upper end of the through hole part 1.

[0013] The suspension rod is matched with the through hole part 1, and the lower end of the suspension rod passes through the inner cylinder and extends out from the lower end of the through hole part 1. The lower end of the suspension rod is fixed with a screw block, and the connecting seat is connected to the frame, so that the frame can be suspended directly below the connecting seat, and a vertical spacing is maintained between the top plate and the opposite surface of the plate part 2. Obviously, the vertical height of the curved plate is greater than the vertical spacing.

[0014] A second spring is mounted on the suspension rod, and the upper end of the second spring contacts the lower end surface of the second plate, and the lower end of the second spring contacts the inner bottom surface of the screw block. At the same time, a radial spacing is formed between the outer peripheral surface of the second spring and the sensitive element, and when the second spring is bent or disturbed, the outer peripheral wall of the second spring can exert a radial impact pressure on the sensitive element, causing the sensitive element to change in physical quantity, so that the sensor body can generate a sensing signal.

[0015] Optionally, the sensitive element portion includes an elastic arch plate and a strain body. The elastic arch plate is arranged along the axial direction of the inner cylinder. The convex curved surface of the elastic arch plate faces the axial center line side of the inner cylinder, and the strain body is fixed on the concave curved surface of the elastic arch plate. The sensor body is connected to the strain body. A radial spacing is formed between the outer peripheral surface of the so-called spring 2 and the sensitive element portion, that is, a radial spacing is formed between the outer wall surface of the spring 2 and the convex curved surface of the elastic arch plate.

[0016] In the above solution, the sensor used by the sensing unit is a strain sensor. In other specific embodiments, the sensor used can also be a grating sensor, a capacitive sensor or other types of sensors.

[0017] Optionally, a ring body is fixedly sleeved on the second spring, and a radial gap is formed between the outer peripheral surface of the ring body and the sensitive element portion. When the second spring is disturbed, the outer peripheral wall surface of the ring body can exert a radial impact force on the sensitive element portion.

[0018] Corresponding to the above optional scheme, a radial spacing is formed between the outer circumferential surface of the ring body and the convex curved surface of the elastic arch plate. Specifically, the radial spacing between the outer circumferential surface of the ring body and the top surface of the convex curved surface of the elastic arch plate can be within the range of 1mm to 5mm. When the spring two is disturbed and its upper part is offset relative to the axis center line, the outer wall of the ring body can apply a force on the convex curved surface of the elastic arch plate distributed on the left or right side, and can apply a force on the convex curved surface of the elastic arch plate distributed on the front side or the rear side. Preferably, a plurality of radial protrusions can be distributed alternately around the circumferential direction on the outer circumferential surface of the ring body, and each sensitive element part corresponds to at least one radial protrusion. When the spring two is disturbed, the radial protrusion can apply a force on the convex curved surface of the elastic arch plate. The radial protrusion is similar to a counterweight, which can cause the impact pressure caused to the sensitive element part when the spring two is disturbed to be more significant, and helps to cause the sensitive element part to have a relatively more significant / larger physical quantity change.

[0019] Optionally, it further comprises a sleeve portion, which comprises a screw body formed on the sleeve, and a screw barrel body, a nut body and a spring three which are configured in association.

[0020] A molded hole is formed on the second vertical arm, and the sleeve of the sleeve part extends into the molded hole, and the outer wall of the sleeve is in tangential contact with the front and rear inner walls of the molded hole or forms a front and rear gap relative to each other. A vertical spacing is maintained between the outer wall of the sleeve and the upper and lower inner wall surfaces of the molded hole, and the upper spacing is preferably larger than the lower spacing. The end portion is inserted into the axial cavity of the sleeve.

[0021] A through hole is formed on the bottom plate of the profile hole for the screw body to pass downward, and the inner diameter of the through hole is larger than the outer diameter of the screw body. An annular flange body is formed on the lower end surface of the second vertical arm and on the periphery of the lower port of the through hole on the bottom plate.

[0022] The screw barrel body is matched and arranged on a section of the screw body extending below the bottom plate, and the upper end of the screw barrel body can extend into the annular flange body. At least the outer diameter of the upper end of the screw barrel body is smaller than the inner diameter of the annular flange body.

[0023] The nut body is sleeved on the screw body and matched with the annular flange body through a thread structure. The screw barrel body is placed in the nut body. The spring three is sleeved on the screw body and the upper and lower ends of the spring three are in contact with the lower end surface of the screw barrel body and the inner bottom surface of the nut body respectively.

[0024] Optionally, an elastic sleeve is fixedly provided on the inner wall of the sleeve portion, and the outer circumferential surface of the end portion contacts the inner circumferential surface of the elastic sleeve.

[0025] An axial cylinder extending coaxially with the sleeve is formed on the bottom surface of the axial cavity of the sleeve of the sleeve portion. The axial cylinder is inserted into the hole cavity of the end portion so that the outer circumference of the axial cylinder contacts the inner circumference of the end portion, and a sealing ring is provided between the opposing surfaces of the two. A circumferential clearance groove is formed at the root of the axial cylinder. The clearance groove extends to a certain depth in the radial direction and the bottom surface of the groove is formed as an irregular curved surface, so that the axial cylinder has the ability to undergo elastic deformation at its root.

[0026] Optionally, a strip-shaped groove is formed on the inner side surface of the vertical plate, a strip-shaped groove is formed on the bottom surface of the strip-shaped groove, and a plurality of tooth grooves are formed on the left and right side walls of the strip-shaped groove and are distributed alternately in the vertical direction.

[0027] A columnar boss corresponding to and matching the strip-shaped recessed grooves on the two vertical plates is formed on the outer wall of the cylinder, and locking parts are respectively arranged on the columnar bosses.

[0028] A slot structure corresponding to the locking part is formed on the columnar boss, and the locking part can be selectively inserted into and removed from the strip groove toward one end side of the strip groove, and matched and separated from the tooth groove to selectively switch the cylinder between a state in which it can be lifted and moved relative to the frame and a state in which it is fixed relative to the frame.

[0029] Optionally, the slot structure formed on the cylindrical boss is specifically as follows: a strip-shaped countersunk hole is formed on the outer end surface of the cylindrical boss; a countersunk hole is formed on the inner wall of the barrel cavity at a position corresponding to the cylindrical boss; and a light column through hole is formed between the strip-shaped countersunk hole and the countersunk hole to connect the two. Correspondingly, the locking part is designed as follows.

[0030] The locking part comprises a column block 1, a column block 2, a spring 1 and a nut body.

[0031] The column block 1 is formed with a light column body 2 which can correspond to and match the light column through hole, and the outer diameter of the light column body 2 is smaller than the outer diameter of the column block 1. The column block 1 is formed with a threaded hole.

[0032] A light column body 1 that can be matched with the light column through hole is formed on the column block 2, and an external thread body 1 and a strip body are formed at both ends of the light column body 1. An external thread body 2 is formed on the end surface of the strip body, and a plurality of profile teeth that can be matched with the tooth groove are formed on the side wall of the strip body. The external thread body 1 matches the threaded hole, and the column block 1 and the column block 2 can be connected as a whole and formed into a cylinder, so that the two light columns can be matched at the light column through hole. The sum of the axial lengths of the two light columns (i.e., the axial length of the cylinder formed by connection) is greater than the axial length of the light column through hole.

[0033] The two ends of the spring 1 are respectively in contact with the inner bottom surface of the countersunk hole and the end surface of the column block 1. In the initial state, the spring 1 can push the column block 1 to cause the strip body on the column block 2 to be completely inserted into the strip countersunk hole.

[0034] The column block 1 is arranged in the countersunk hole and a set of springs is arranged on the light column 2. The free end of the external thread body 2 can pass out of the strip groove and match the nut body. Screwing the nut body can pull the column block 2 outward to drive the strip body to move into the strip groove and enable the profile teeth on the strip body to be inserted into the tooth grooves at the corresponding height position on the strip groove, so that the cylinder body is fixed at a certain height position relative to the vertical plate or the frame body. Screwing the nut body in the reverse direction will cause the strip body to retract into the strip countersunk hole under the elastic thrust of the spring 1, and then the cylinder body can move in the vertical direction relative to the vertical plate or the frame body.

[0035] The strip groove is in tangential contact with the peripheral surface of the cylindrical boss, and can guide the cylinder to move up and down relative to the frame in the vertical direction. The outer diameter of the second external thread body is not greater than the groove width of the strip groove, and preferably the outer diameter of the second external thread body is smaller than the groove width of the strip groove to reduce the resistance when the cylinder moves up and down relative to the vertical plate.

[0036] The present invention also relates to a railway contact network positioning device state monitoring method based on the above-mentioned railway contact network positioning device, comprising the following steps.

[0037] (I) When the second monitoring spring touches the sensitive element, the physical quantity change (magnitude) of the sensitive element is fed back to the sensor body to generate a real-time sensing signal;

[0038] Sensitive element parts are provided at least on the left and right sides of the spring 2. When the upper part of the spring 2 swings back and forth to the left or right, it can touch the sensitive element part on the left (such as on the elastic arch plate) and the sensitive element part on the right (such as on the elastic arch plate), so that the sensitive element parts (strain bodies) on both sides undergo physical quantity changes, which are fed back to the corresponding matching sensor bodies, respectively, and real-time sensing signals are generated, respectively.

[0039] (II) Analyze and process the sensor signal generated in real time, and convert it into a real-time frequency and / or real-time amplitude output signal.

[0040] (III) analyzing the vibration frequency and / or amplitude signal, and determining, based on the result, whether the lifting amount of the free end of the elastic limit positioning arm exceeds a preset range, and / or determining whether the self-oscillation condition and the jump amplitude of the contact line are within a preset range;

[0041] According to the amplitude signal, the up and down movement amplitude of the free end of the elastic limit positioning arm can be analyzed, and it can be determined whether the lifting amount of the free end of the elastic limit positioning arm exceeds the preset range. The so-called preset range here is determined through repeated tests, that is, the test measures and compares the corresponding relationship between the actual lifting amount of the free end of the elastic limit positioning arm and the amplitude formed by the sensor, and the lifting amount data is associated with the amplitude data to form corresponding and corroborative associated data.

[0042] According to the frequency and amplitude signals, the self-oscillation and jump amplitude of the contact line can be analyzed and judged, and it can be determined whether the self-oscillation intensity and jump amplitude of the contact line are within their respective preset ranges. Similarly, the preset range here is also determined through repeated experiments, that is, the test measures and compares the corresponding relationship between the jump amplitude of the contact line and the amplitude formed by the sensor, and associates the jump amplitude data with the amplitude data; the test measures and compares the self-oscillation frequency, the peaks and troughs of the oscillation of the contact line, and respectively corresponds to the frequency and amplitude formed by the sensor, and establishes an association between the comprehensive vibration data obtained by the sensor and the self-oscillation data of the contact line, forming associated data that can correspond and corroborate.

[0043] Optionally, in step (II), after analyzing and processing the sensing signal, the frequency and amplitude signals converted are both digital signals;

[0044] In step (III), a determination is made by comparing whether the digital signal exceeds the warning threshold or falls within the preset value interval.

[0045] The beneficial effects of the present invention are as follows: the railway contact network positioning device and its state monitoring method provided by the present invention, by setting a damping mechanism to support and fix the right end side of the elastic limit positioning arm, can effectively suppress the influence of the inertial force and superimposed aerodynamic force generated by the rapid and frequent changes in the height position of the pantograph on the height position and the fluctuation intensity of the contact line, can suppress the lifting amount of the wrist arm positioning device / locator as a whole, and the elastic limit positioning arm lamp component contained therein, can effectively offset and weaken the lifting force of the pantograph on the contact line, and the influence on the lifting amount of the positioning device, so that the lifting amount of the positioning device is kept in a small range, so that the situation of hitting the bow due to the excessive lifting amount of the positioning device of the contact line / net is effectively suppressed. At the same time, it can also effectively suppress the self-oscillation degree, jump amplitude and frequency of the contact line, and can effectively prevent the pantograph from going offline due to the turbulence of the contact line.

[0046] In addition, the associated structural system formed by the cylinder, frame and sleeve portion on the right side of the elastic limit positioning arm designed in the present invention can well limit the elastic limit positioning arm to a height position that conforms to / adapts to site conditions. The adjustable range of the height position is relatively large, and the reliability and stability of the fixed position can be ensured after the elastic limit positioning arm is fixed at any height position, which greatly facilitates construction and operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of the present invention.

[0048] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0049] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at point B in the middle.

[0050] Figure 4 It is a schematic diagram of the cross-sectional structure of the cylinder.

[0051] Figure 5 Schematic diagram of the cross-sectional structure of light column 2.

[0052] Figure 6 This is a schematic diagram of the left-view structure of light column 2.

[0053] Figure 7 This is a schematic diagram of the right view structure of light column 1.

[0054] Figure 8 Schematic diagram of the cross-sectional structure of light column 1.

[0055] Fig. 9 It is a structural diagram of the matching of the vertical plate of the frame and the cylinder.

[0056] Fig.10 It is a schematic diagram of the side structure of the cylinder.

[0057] Fig.11 It is a schematic diagram of the top view of the frame structure.

[0058] Fig.12 It is a schematic diagram of the cross-sectional structure of the suspension connection seat.

[0059] Fig.13 It is a schematic diagram of the structure of the suspension connection seat when viewed from above.

[0060] Fig.14 Schematic diagram of the cross-sectional structure of the sensor unit.

[0061] Fig.15 for Fig.14 Schematic diagram of the enlarged structure at point C in the middle.

[0062] In the figure: 100 horizontal positioning tube; 200 elastic limit positioning arm, 201 end; 300 positioning wire clamp; 400 contact wire; 10 positioning support, 11 seat body, 12 clamping hoop, 13 first vertical arm, 14 second vertical arm, 141 bottom plate, 142 annular flange body; 20 frame, 21 vertical plate, 211 strip-shaped sinking groove, 212 strip-shaped groove, 213 tooth groove, 22 top plate, 221 through hole part 1, 222 groove, 23 arm plate 1, 24 arm plate 2; 30 cylinder, 31 cylinder cavity, 32 column boss, 321 sink hole, 322 light column through hole, 323 strip sink hole, 33 locking part, 331 column block 1, 332 column block 2, 333 spring 1, 3 34 nut body, 1 optical column one, 2 optical column two, 3 external threaded body one, 4 threaded hole, 5 strip body, 6 external threaded body two, 7 external prism body; 40 connecting seat, 41 plate part one, 42 plate part two, 43 suspension rod, 431 pin hole, 44 spring two, 45 screw block body, 451 through hole part two, 452 annular make way groove, 46 curved plate; 50 sensing unit, 51 sensor body, 511 strain body, 52 elastic arch plate, 53 inner cylinder, 54 outer cylinder; 60 sleeve part, 61 screw body, 62 screw cylinder body, 621 radial flange, 622 axial flange, 63 nut body, 64 spring three, 65 axial cylinder, 651 make way groove, 66 elastic sleeve. DETAILED DESCRIPTION

[0063] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0064] like Figures 1 to 15 A railway contact network positioning device shown includes a horizontal positioning tube 100, an elastic limit positioning arm 200, a positioning wire clamp 300, a positioning support 10, a frame 20, a cylinder 30, a connecting seat 40, a sensor unit 50 and a sleeve part 60.

[0065] The left end of the horizontal positioning tube 100 is fixed on the oblique arm (not shown in the figure), and the right end extends toward the side away from the oblique arm. A clamping part 12 is formed on the upper part of the seat body 11 of the positioning support 10, and the positioning support 10 is fixedly connected to the middle part of the horizontal positioning tube 100 (biased toward the side away from the oblique arm, that is, biased to the right side) through the clamping part 12. The seat body 11 extends downwardly and the lower part matches the end 201 of the right end of the elastic limit positioning arm 200. The positioning wire clamp 300 is arranged at the free end (left end) of the elastic limit positioning arm 200 and matches the contact line 400 to locate the spatial position of the contact network. Therefore, in the contact network / line positioning device, the positioning support 10 is supported and fixed by the horizontal positioning tube 100, and then the elastic limit positioning arm 200 is suspended and fixed by the positioning support 10, and finally the contact line 400 is positioned by the positioning wire clamp 300 arranged at the free end of the elastic limit positioning arm 200. The aforementioned technical contents are all within the scope of the prior art, so they will not be described in detail. When the contact wire 400 is lifted by the pantograph, the mechanical force acting on the contact wire 400 / contact network will be transmitted to the components on the contact network positioning device such as the positioning support 10 and the horizontal positioning tube 100 through the elastic limit positioning arm 200, and the contact network positioning device / contact network positioner can be lifted, resulting in a significant lift of the local part of the contact network positioning device.

[0066] like Figures 1 to 3 As shown, in the scheme of the present invention, the seat body 11 of the positioning support 10 is formed with a first vertical arm 13 and a second vertical arm 14 which are opposite to each other on the left and right. The second vertical arm 14 is relatively located on the right side of the first vertical arm 13 and the lower end of the second vertical arm 14 extends downwardly with a longer length relative to the lower end of the first vertical arm 13. The right end side of the elastic limit positioning arm 200 is matched with the two vertical arms (i.e., the first vertical arm 13 and the second vertical arm 14) respectively, and the right end side of the elastic limit positioning arm 200 is elastically fixed, and the mechanical force transmitted by the contact line 400 can be buffered and consumed by the damping energy absorption principle, so as to achieve the purpose of suppressing the excessive lifting of the elastic limit positioning arm 200, the positioning support 10 and other components, and the purpose of suppressing the self-oscillation intensity, jump amplitude and other conditions of the contact line 400, and effectively prevent the pantograph from going offline due to the strong turbulence of the contact line 400.

[0067] like Figure 1 to Figure 2 , Fig. 9 , Fig.11As shown, the frame 20 includes a pair of front and rear facing vertical plates 21 and a top plate 22 fixed to the upper ends of the two vertical plates 21, so that the frame 20 as a whole is formed into a U-shaped frame, and the open end of the U-shaped frame faces downward. The top plate 22 is formed with a through hole portion 221 with two axes along the vertical direction. The through hole portion 221 is a multi-step through hole, which can be a two-step through hole or a three-step through hole, and the inner diameter of each step is gradually reduced from top to bottom. Three grooves 222 arranged alternately in front and back are formed on the upper end surface of the top plate 22, and the grooves 222 extend through in the left-right direction. See Fig. 9 , arm plate 1 23 and arm plate 2 24 may be formed at the lower part of the vertical plate 21. After the assembly (between the cylinder 30 and the frame 20) is completed, the arm plate 1 23 and the arm plate 2 24 are connected by bolts, so that the lower ends of the two vertical plates 21 can be fixed as a whole, so that the frame 20 is formed into a rectangular frame. If the thickness of the two vertical plates 21 is increased and has good rigidity, the arm plate 1 23 and the arm plate 2 24 may not be provided in the specific implementation, so that the frame 20 is always a U-shaped frame structure.

[0068] like Figure 1 , Figure 8 As shown, the cylinder 30 is placed between the opposite surfaces of the two vertical plates 21, and the cylinder 30 can selectively move up and down between the two vertical plates 21 and be fixed at a certain height relative to the frame 20 (or relative to the vertical plates 21), so as to adjust and fix the height position of the elastic limit positioning arm 200 (or the positioning wire clamp 300). The end 201 of the elastic limit positioning arm 200 passes through the cylinder cavity 31 of the cylinder 30 and is fixedly matched with the second vertical arm 14.

[0069] The height position of the elastic limit positioning arm 200 can be adjusted and set, and the height position of the positioning wire clamp 300 can be better set according to the on-site conditions, so that it can better adapt to the height position of the contact line 400 in the installation site, so as to better control the magnitude of the interaction force between the pantograph and the contact line 400, and reduce the mechanical confrontation strength between the two to a reasonable range in advance, thereby creating better conditions for other technical features of the present invention to play a damping role, and ultimately better and more stably achieve the effect of suppressing the positioning device from being lifted, suppressing the oscillation intensity and jump amplitude of the contact line 400, and other adverse situations.

[0070] like Figures 1 to 10As shown, a strip-shaped groove 211 is formed on the inner side of the vertical plate 21, a strip-shaped groove 212 is formed on the inner bottom surface of the strip-shaped groove 211, and a plurality of tooth grooves 213 are formed on the left and right walls of the strip-shaped groove 212, and the tooth grooves 213 on the two walls are alternately distributed along the vertical direction, and the tooth grooves 213 on the two walls can be opposite to each other. A columnar boss 32 is formed on the outer wall of the cylinder 30 to match the strip-shaped grooves 211 on the two vertical plates 21. Locking parts 33 are respectively arranged on the two columnar bosses 32.

[0071] A strip-shaped counterbore 323 is formed on the outer end surface of the cylindrical boss 32. A counterbore 321 is formed on the inner wall of the barrel cavity 31 at a position corresponding to the cylindrical boss 32. A light column through hole 322 is formed between the strip-shaped counterbore 323 and the counterbore 321 to connect the two.

[0072] The locking portion 33 includes a column block 1 331 , a column block 2 332 , a spring 1 333 and a nut body 334 .

[0073] The column block 1 331 is formed with a light column 2 that can correspond to the light column through hole 322, and the outer diameter of the light column 2 is smaller than the outer diameter of the column block 1 331. The column block 1 331 is formed with a threaded hole 4 that passes through the axial direction thereof. To facilitate screwing the column block 1 331, an outer prism 7 is formed on the outer end surface of the column block 1 331.

[0074] The column block 2 332 is formed with a light column 1 that can be matched with the light column through hole 322, and the two ends of the light column 1 are respectively formed with an external thread body 3 and a strip body 5. An external thread body 2 6 is formed on the end surface of the strip body 5, and a plurality of profile teeth that can be matched with the tooth groove 213 are formed on the side wall of the strip body 5.

[0075] The external threaded body 1 3 matches the threaded hole 4, and can connect the column block 1 331 and the column block 2 332 into an integral block, and make the two light columns (i.e., light column 2 2 and light column 1 1) correspond to the light column through hole 322. The outer diameters of the two light columns are consistent with the inner diameter of the light column through hole 322. The sum of the axial lengths of the two light columns is greater than the axial length of the light column through hole 322. Therefore, in the initial state, there are two situations in which only the light column 1 or the light column 1 and part of the light column 2 2 correspond to the light column through hole 322; on the contrary, when the cylinder 30 can be fixed at a required height relative to the frame 20, there are two situations in which only the light column 2 2 or the light column 2 2 and part of the light column 1 1 correspond to the light column through hole 322. The matching relationship between the two light columns and the light column through hole 322 enables the integral block formed by connecting the column block 1 331 and the column block 2 332 to move linearly back and forth relative to the cylinder 30 along the radial direction (of the cylinder cavity 31 ).

[0076] The two ends of the spring 1 333 are in contact with the inner bottom surface of the counterbore 321 and the end surface of the column block 1 331 respectively. The column block 1 331 is arranged in the counterbore 321 and the spring 1 333 is sleeved on the light column 2 2. In the initial state, the spring 1 333 can push the column block 1 331 to pull the column block 2 332, so that the strip 5 on the column block 2 332 remains in a state of being fully inserted into the strip counterbore 323.

[0077] The free end of the external threaded body 2 6 can pass out of the strip groove 212 and match the nut body 334. Twisting the nut body 334 can pull the column block 2 332 outward to drive the strip body 5 to move into the strip groove 212 and insert the profile teeth into the tooth groove 213 at the corresponding height position, so that the cylinder 30 is fixed at a certain height position relative to the vertical plate 21 or relative to the frame 20. Twisting the nut body 334 in the reverse direction, under the elastic thrust of the spring 1 333, the strip body 5 can be retracted into the strip counterbore 323 to reset, and then the cylinder 30 can move in the vertical direction relative to the vertical plate 21 or relative to the frame 20. The plurality of teeth on each side wall surface of the strip body 5 are simultaneously inserted into the plurality of tooth grooves 213 in the corresponding height intervals, so as to ensure the stability and firmness of the cylinder body 30 after being fixed on the frame body 20 .

[0078] The strip-shaped groove 211 is in tangential contact with the circumference of the columnar boss 32, and can guide the cylinder 30 to move up and down in the vertical direction relative to the frame 20. The outer diameter of the external thread body 26 is not greater than the groove width of the strip-shaped groove 212, and preferably the outer diameter of the external thread body 26 is smaller than the groove width of the strip-shaped groove 212, so as to reduce the movement resistance of the cylinder 30 when it moves up and down relative to the vertical plate 21.

[0079] like Figure 1 to Figure 2 , Figure 12 to Figure 13 As shown, the connecting seat 40 includes a plate portion 1 41 and a plate portion 2 42 which are opposite to each other, and the plate portion 1 41 is fixedly connected to the lower end surface of the first vertical arm 13. The lower end surface of the plate portion 2 42 is formed with two suspension rods 43 whose axes extend downward along the vertical direction, and a plurality of curved panels 46 which are matched one by one with the grooves 222 on the top plate 22.

[0080] The lower convex curved surface / lower convex arc surface of the curved plate 46 extends into the corresponding groove 222. A vertical distance is formed between the lowest end of the curved plate 46 and the inner bottom surface of the groove 222 (in the embodiment without the elastic body mentioned below).

[0081] After an elastic body (not shown in the figure) is arranged in the groove 222, the curved plate 46 is inserted into the groove 222, and the lower arc surface of the curved plate 46 contacts the elastic body, which can be in a tangential contact state, or in a contact state where the curved surface of the curved plate 46 forms a certain degree of compression / extrusion on the elastic body. The hardness of the selected elastic body does not need to be too large, and it is better to be relatively soft, so that the elastic body can easily buffer and absorb kinetic energy through its own elastic deformation when the curved plate 46 moves, and it is not easy to produce strong mechanical resistance and cause strong vibration due to the hard contact between the curved surface of the curved plate 46.

[0082] The upper end surface of the elastic body is set to be in a state of being retracted downward relative to the upper end of the groove 222. Generally, the thickness of the lower part of the curved plate 46 (the dimension in the front-to-back direction) is 0mm to 2mm smaller than the width of the upper part of the groove 222 (the dimension in the front-to-back direction), preferably in the range of 0mm to 1mm. The curved plate 46 and the groove 222 can also be interference matched, and then the thickness of the lower part of the curved plate 46 is 0mm to 0.5mm larger than the width of the upper part of the groove 222.

[0083] By providing the curved panel 46, on the one hand, the connection stability between the connecting seat 40 and the frame 20 in the front-to-back relative position can be increased, so that the frame 20 is not easy to swing / shift significantly in the front-to-back direction relative to the connecting seat 40 or the positioning support 10, and has a certain buffering and energy absorption effect, becoming a damping part; on the other hand, the frame 20 can be better guided to swing in the left-right direction relative to the connecting seat 40 or the positioning support 10, and the matching relationship between the spring 244, the elastic body provided in the groove 222 and the curved panel 46 can be used to suppress the amplitude of the contact line 400 being lifted by the pantograph, thereby achieving a buffering energy absorption effect, and reducing the amount by which the positioning device of the contact line 400 is lifted, as well as the jumping amplitude of the contact line 400 itself, so that the height position of the positioning wire clamp 300 has an elastic buffer zone, so that the contact line 400 and the pantograph can form a soft contact point at this position.

[0084] like Figure 1 to Figure 2 , Figure 14 to Figure 15 As shown, the sensing unit 50 includes an outer cylinder 54, an inner cylinder 53 fixed at the upper end of the outer cylinder 54, and a plurality of sensor bodies 51 fixed on the inner cylinder 53. The (multiple) sensitive element parts on the plurality of sensor bodies 51 are alternately distributed around the circumference and fixed on the inner circumference of the inner cylinder 53. The outer cylinder 54 is fixed at the upper end of the through hole part 221.

[0085] The through hole part 221 and the suspension rod 43 are in a one-to-one matching relationship. After the lower end of the suspension rod 43 passes through the axial cavity of the inner cylinder 53, it extends out from the lower end of the through hole part 221, and a screw block 45 is fixedly matched at the lower end of the suspension rod 43, so that the connection seat 40 and the frame 20 are connected together, so that the frame 20 can be fixedly suspended directly below the connection seat 40.

[0086] The screw block 45 is formed with a countersunk portion, and the lower end of the spring 2 44 contacts the inner bottom surface of the countersunk portion, and a through hole portion 2 451 is formed on the bottom surface of the countersunk portion. The lower end of the suspension rod 43 is formed with an external thread section that matches the through hole portion 2 451, so that the suspension rod 43 is fixedly connected to the screw block 45. By screwing the screw block 45 to adjust the matching height position of the external thread section at the lower part of the suspension rod 43, the initial compression state of the spring 2 44 can be regulated. An annular clearance groove 452 is formed on the end surface of the screw block 45 facing the top plate 22, and the annular clearance groove 452 can make the annular radial flange of the screw block 45 have elastic deformation ability to resist loosening caused by vibration, thereby ensuring the reliability of the connection. In addition, a pin hole 431 may be provided at the lower portion of the suspension rod 43 , and when the screw block 45 is matched and connected with the suspension rod 43 , a pin is inserted into the pin hole 431 to lock the screw block 45 in a fixed position on the suspension rod 43 .

[0087] The suspension rod 43 is provided with a second spring 44, and the upper end of the second spring 44 is in contact with the lower end surface of the second plate portion 42, and the lower end of the second spring 44 is in contact with the inner bottom surface of the screw block 45. A radial spacing is formed between the outer peripheral surface of the second spring 44 and the sensitive element portion, and when the second spring 44 is bent / disturbed, the outer peripheral wall surface of the second spring 44 can exert radial pressure on the sensitive element portion, so that the (corresponding) sensor body 51 generates a sensing signal.

[0088] The inner diameter of the second spring 44 is larger than the outer diameter of the suspension rod 43, and preferably the former is 3 to 5 times the latter. The outer diameter of the second spring 44 is preferably consistent with the minimum inner diameter of the lower part of the through hole part 1 221, so that the lower part of the second spring 44 can form a relatively tight fit with the top plate 22. In this way, there will be a large radial distance between the middle and upper part of the second spring 44 and the upper inner wall of the through hole part 1 221.

[0089] A ring body (not shown in the figure) can be arranged on the spring 2 44, and the ring body is placed in the middle and upper part of the spring 2 44, so that it corresponds to the sensitive element part of the sensor unit 50. At this time, there is a radial gap between the outer circumference of the ring body and the sensitive element part. When the frame 20 is subjected to the mechanical action of the elastic limiting positioning arm 200, and the spring 2 44 is vibrated, and the upper part is offset and bent, the outer circumference of the ring body can collide with the sensitive element part, and the sensor unit 50 generates a sensing signal. Compared with the situation when the ring body is not provided, but the outer circumference of the spring 2 44 is used to apply a force on the sensitive element part, the force condition of the sensitive element part can be more significant after the ring body is provided, and the sensitivity of the generated sensing signal is improved. Because when the outer wall of the second spring 44 exerts a force on the sensitive element part, a considerable part of the force will be consumed by the radial deformation of the second spring 44, weakening the effect of the force on the sensitive element part, causing the detection of the sensitive element part to be slow and insensitive. In order to further improve the sensitivity of the sensitive element part and enhance the significance of the sensing signal, a plurality of radial protrusions can be arranged on the outer wall of the ring body, and the radial protrusions are matched with the sensitive element part respectively. When a mechanical disturbance occurs on the upper part of the second spring 44, the radial protrusions can exert a force on the sensitive element part.

[0090] In the solution of the present invention, the second spring 44 is required to have a certain radial rigidity so that it will not be easily flattened when subjected to radial pressure. At the same time, the second spring 44 also needs to have a long axial extension length so that when subjected to the up and down disturbance of the frame 20, its cylindrical body can bend and buffer, and the upper part of the second spring 44 can be offset to the left or right, forward or backward to absorb energy, and exert a force on the sensitive element.

[0091] In order to achieve dustproof and waterproof purposes, a rubber sleeve made of elastic material is sleeved between the top plate 22 and the first vertical arm 13. The spring 2 44, the connecting seat 40, the sensor unit 50, etc. are sealed inside by the rubber sleeve and isolated from the outside. An elastic sealing ring can be set in the annular groove 452 to seal the opposite surface of the screw block 45 and the lower end surface of the top plate 22.

[0092] like Figure 14 to Figure 15As shown, the sensitive element part includes an elastic arch plate 52 and a strain body 511 fixed on the elastic arch plate 52. The sensor body 51 is connected to the strain body 511, and can generate a sensing signal when the strain body 511 is strained. The elastic arch plate 52 is arranged along the axial direction of the inner cylinder 53, and the elastic arch plate 52 is arched toward the side of the inner circumference away from the inner cylinder 53, that is, the convex curved surface of the elastic arch plate 52 faces the axial center line side of the inner cylinder 53. The strain body 511 is arranged on the concave curved surface of the elastic arch plate 52. The outer wall of the spring 244 can collide with the convex curved surface of the elastic arch plate 52, so that the elastic arch plate 52 is elastically deformed, and the strain body 511 is deformed to generate a strain signal. The sensor body 51 can detect the change of the strain signal and process it to form a corresponding sensing signal, such as a pressure signal and / or a vibration frequency, a vibration amplitude signal, etc.

[0093] like Figure 1 , Figure 3 As shown, the sleeve portion 60 includes a screw body 61 formed on its sleeve (or sleeve body), as well as a screw barrel body 62, a nut body 63, a spring 64 and an axial barrel body 65. Correspondingly, a mold hole is formed on the second vertical arm 14, so that the mold hole is through from left to right and has a long extension in the vertical direction (relative to the front and rear directions). The sleeve body extends into the mold hole and the outer wall of the sleeve body is in tangential contact with the front and rear inner walls of the mold hole or a front and rear gap is formed relatively. A vertical spacing is maintained between the outer wall of the sleeve body and the upper and lower inner wall surfaces of the mold hole.

[0094] The end 201 of the elastic limiting positioning arm 200 can be inserted into the sleeve body of the sleeve portion 60. An elastic sleeve 66 is fixedly provided on the inner wall of the sleeve body. The outer circumference of the end 201 contacts the inner circumference of the elastic sleeve 66.

[0095] The axial cylinder 65 is formed in the axial cavity of the sleeve body and extends coaxially with the sleeve body. The axial cylinder 65 is inserted into the hole of the end 201, so that the outer circumference of the axial cylinder 65 contacts the inner circumference of the end 201, and a sealing ring is provided between the opposite surfaces of the two. A circumferential clearance groove 651 can be formed at the root of the axial cylinder 65, and the clearance groove 651 has an extended depth in the radial direction, so that the axial cylinder 65 has an elastic deformation ability to bend relative to its axis.

[0096] By virtue of the elastic deformation capability of the elastic sleeve 66 and the axial cylinder 65, a soft connection / flexible connection / elastic connection can be established between the end 201 and the sleeve body, forming an elastic buffer connection relationship. Moreover, after the elastic sleeve 66 is arranged between the relative circumferences of the axial cylinder 65 and the sleeve body, an elastic buffer can be generated for the end 201 along the axial direction.

[0097] A through hole for the screw body 61 to pass downward is formed on the bottom plate 141 of the profile hole on the second vertical arm 14, and the inner diameter of the through hole is larger than the outer diameter of the screw body 61. An annular flange body 142 is formed on the lower end surface of the second vertical arm 14 and at the periphery of the lower end of the through hole on the bottom plate 141.

[0098] The screw barrel body 62 is matched with the section of the screw body 61 extending below the bottom plate 141, and the upper end of the screw barrel body 62 can extend into the annular flange body 142. The nut body 63 is sleeved on the screw body 61 and matches the annular flange body 142 through a threaded structure. The screw barrel body 62 is placed in the nut body 63. The spring three 64 is sleeved on the screw body 61, and the upper and lower ends of the spring three 64 are in contact with the lower end surface of the screw barrel body 62 and the inner bottom surface of the nut body 63 respectively.

[0099] By adjusting the height position of the screw barrel body 62 on the screw body 61, the height position of the end 201 relative to the profile hole of the second vertical arm 14 can be limited, so that the end 201 of the elastic limit positioning arm 200 can be kept in a state of basically horizontal extension. By adjusting the matching position between the nut body 63 and the annular flange body 142, the initial compression state of the spring three 64 can be adjusted, the size of the initial resistance elastic force can be set, and the downward movement stroke of the screw body 61 or the end 201 can be limited, so as to limit the upward displacement position of the free end of the elastic limit positioning arm 200, and the occurrence of excessive lifting can be flexibly suppressed without generating excessive reaction force on the positioning support 10. Preferably, an annular countersunk hole can be set at the lower end of the through hole on the bottom plate 141, and an elastic washer or spring body can be set in the annular countersunk hole, so that the screw body 61 or the end 201 can have an elastic buffer space in both the upper and lower directions.

[0100] In order to facilitate the adjustment of the position of the screw barrel body 62 on the screw body 61, a radial flange 621 is formed at the lower end of the screw barrel body 62, and an axial flange 622 is formed at the lower end of the screw barrel body 62. The free end of the axial flange 622 extends downward and passes through the nut body 63. The spring three 64 is sleeved on the axial flange 622, so that the upper end of the spring three 64 contacts the lower end surface of the radial flange 621. At least the outer diameter of the upper end of the screw barrel body 62 is smaller than the inner diameter of the annular flange body 142.

[0101] By establishing an elastic connection between the first vertical arm 13 and the frame 20 by means of the connecting seat 40, and establishing an elastic connection between the second vertical arm 14 and the end 201 by means of the sleeve portion 60, two elastic connection positions / damping positions are formed between the elastic limit positioning arm 200 and the positioning support 10. When the contact line 400 lifts, the free end of the elastic limit positioning arm 200 will lift upward, and the two elastic connection support positions on the right side can generate damping resistance, buffering to disperse and consume the lifting force, and can effectively suppress the upward movement of the free end of the elastic limit positioning arm 200, so that the situation of collision caused by excessive lifting of the positioning device of the contact line 400 is effectively suppressed. The elastic positioning support position formed by the sleeve portion 60 can constrain the swing of the free end of the end portion 201 in space, thereby effectively suppressing the swing amplitude and intensity of the free end of the elastic limiting positioning arm 200 in space, and can effectively suppress the self-oscillation degree, jump amplitude and frequency of the contact line 400, thereby preventing offline phenomenon from occurring.

[0102] In summary, the damping mechanism provided in the present invention can effectively offset the lifting force of the pantograph on the contact line 400, and the influence on the lifting amount of the positioning device, so that the height of the positioning device can be kept in a small range, so that the situation of hitting the pantograph due to excessive lifting of the positioning device of the contact line 400 / net can be effectively suppressed. At the same time, the self-oscillation degree, jump amplitude and frequency of the contact line 400 can also be effectively suppressed, and the phenomenon of the pantograph being offline due to the turbulence of the contact line 400 can be effectively prevented.

[0103] The present invention also reduces the "hard points" on the contact line 400, and alleviates the degree of wear on the contact line 400 at the positioning device, the positioning wire clamp 300, etc., which helps to extend the service life of the contact line 400. "Hard points" are mass concentration points on the contact line 400, such as at the positioning device / positioner, the positioning wire clamp 300 / contact wire clamp and the wire fork, etc., because of the poor elasticity in the vertical direction, the pressure on the contact line 400 suddenly surges when passing through such positions. Even if the train is running at a lower speed, it will go offline at the "hard points", and the local wear at the "hard points" will increase, which can shorten the life of the contact line 400. The contact network positioning device provided by the present invention can reduce the self-oscillation degree and jump amplitude of the contact line 400 and reduce "hard points".

[0104] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A railway contact network positioning device, comprising a horizontal positioning tube (100), an elastic limiting positioning arm (200), a positioning wire clamp (300) and a positioning support (10); the upper part of a seat body (11) of the positioning support (10) is fixedly matched with the horizontal positioning tube (100), and the lower part is matched with the end (201) of the elastic limiting positioning arm (200); the characteristics are: It also includes a frame (20), a cylinder (30), a connecting seat (40) and a sensor unit (50); a first vertical arm (13) and a second vertical arm (14) are formed on the seat body (11) and are opposite to each other on the left and right, and the lower end of the second vertical arm (14) extends downward relative to the lower end of the first vertical arm (13); The frame (20) comprises a pair of front and rear facing vertical plates (21) and a top plate (22) connecting the upper ends of the two vertical plates (21); the top plate (22) is formed with at least one through hole portion (221) whose axis is along the vertical direction; a plurality of grooves (222) arranged alternately in the front and rear directions are formed on the upper end surface of the top plate (22), and the grooves (222) extend in the left-right direction; The cylinder (30) is placed between the vertical plates (21) and can be selectively moved up and down between the vertical plates (21) and fixed relative to the frame (20); the end (201) passes through the cylinder cavity (31) of the cylinder (30) and is fixedly matched with the second vertical arm (14); The connecting seat (40) comprises a plate portion 1 (41) and a plate portion 2 (42) which are opposed to each other in the upper and lower directions, and the plate portion 1 (41) is fixed to the lower end surface of the first vertical arm (13); at least one suspension rod (43) and a curved plate (46) which matches the groove (222) on the top plate (22) in a one-to-one correspondence are formed on the lower end surface of the plate portion 2 (42); the lower portion of the curved surface of the curved plate (46) extends into the groove (222) and there is a gap between the curved surface and the inner bottom surface of the groove (222); The sensing unit (50) comprises an outer cylinder (54), an inner cylinder (53) fixed to the upper end of the outer cylinder (54), and a plurality of sensor bodies (51) fixed to the inner cylinder (53); the sensitive element parts of the sensor bodies (51) are alternately distributed around the circumference and fixed to the inner circumferential surface of the inner cylinder (53); the outer cylinder (54) is fixed to the upper end of the through hole part (221); The suspension rod (43) matches with the through hole portion 1 (221), so that the lower end of the suspension rod (43) passes through the inner cylinder (53) and extends from the lower end of the through hole portion 1 (221), matches with the screw block body (45), and connects the connecting seat (40) with the frame body (20); a spring 2 (44) is sleeved on the suspension rod (43), and the upper and lower ends of the spring 2 (44) are respectively in contact with the lower end surface of the plate portion 2 (42) and the inner bottom surface of the screw block body (45); a radial spacing is formed between the outer peripheral surface of the spring 2 (44) and the sensitive element portion, and the outer peripheral wall surface of the spring 2 (44) can exert a force on the sensitive element portion.

2. The railway contact network positioning device according to claim 1, characterized in that: The sensitive element portion comprises an elastic arch plate (52) and a strain body (511); the elastic arch plate (52) extends along the axial direction of the inner cylinder (53), and its convex curved surface faces the axial center line side of the inner cylinder (53); the strain body (511) is fixedly arranged on the concave curved surface of the elastic arch plate (52); and the sensor body (51) is connected to the strain body (511).

3. The railway contact network positioning device according to claim 1 or 2, characterized in that: A ring body is fixedly sleeved on the second spring (44), and a radial gap is formed between the outer peripheral surface of the ring body and the sensitive element part, so that the outer peripheral wall surface of the ring body can exert a force on the sensitive element part.

4. The railway contact network positioning device according to claim 1 or 2, characterized in that: It also includes a sleeve portion (60) having a screw body (61) formed on the sleeve and containing a screw barrel body (62), a nut body (63) and a spring three (64); A molded hole is formed on the second vertical arm (14), and the sleeve of the sleeve portion (60) extends into the molded hole, and the outer wall of the sleeve is in tangential contact with the front and rear inner walls of the molded hole or a gap is formed relative to each other, so that a vertical spacing is maintained between the outer wall of the sleeve and the upper and lower inner wall surfaces of the molded hole; the end portion (201) is inserted into the sleeve; a through hole for the screw body (61) to pass downward is formed on the bottom plate (141) of the molded hole, and the inner diameter of the through hole is larger than the outer diameter of the screw body (61); an annular flange body (142) is formed on the lower end surface of the second vertical arm (14) and on the periphery of the lower end of the through hole on the bottom plate (141); The screw barrel body (62) is matched with a section of the screw body (61) extending below the bottom plate (141), and the upper end of the screw barrel body (62) can extend into the annular flange body (142), so that at least the outer diameter of the upper end of the screw barrel body (62) is smaller than the inner diameter of the annular flange body (142); the nut body (63) is sleeved on the screw body (61) and matched with the annular flange body (142) through a thread structure; the screw barrel body (62) is placed in the nut body (63); the spring three (64) is sleeved on the screw body (61), and the upper and lower ends of the spring three (64) are respectively in contact with the lower end surface of the screw barrel body (62) and the inner bottom surface of the nut body (63).

5. The railway contact network positioning device according to claim 4, characterized in that: An elastic sleeve (66) is fixedly provided on the inner wall of the sleeve, and the outer peripheral surface of the end portion (201) contacts the inner peripheral surface of the elastic sleeve (66); An axial cylinder (65) extending coaxially therewith is formed on the bottom surface of the axial cavity of the sleeve; the axial cylinder (65) is inserted into the hole cavity of the end portion (201) so that the outer circumferential surface of the axial cylinder (65) contacts the inner circumferential surface of the end portion (201); a clearance groove (651) is formed at the root of the axial cylinder (65) so that the axial cylinder (65) can be elastically deformed at its root.

6. The railway contact network positioning device according to claim 1 or 2, characterized in that: An elastic body is arranged in the groove (222), and the curved plate (46) is extended into the groove (222) to contact the elastic body.

7. The railway contact network positioning device according to claim 1 or 2, characterized in that: A strip-shaped sink groove (211) is formed on the inner side surface of the vertical plate (21), a strip-shaped groove (212) is formed on the bottom surface of the strip-shaped sink groove (211), and a plurality of tooth grooves (213) are formed on the left and right wall surfaces of the strip-shaped groove (212), and the tooth grooves (213) are distributed alternately in the vertical direction; A columnar boss (32) is formed on the outer wall of the cylinder (30) and corresponds to and matches the strip-shaped recessed grooves (211) on the two vertical plates (21); a locking portion (33) is disposed on each of the columnar bosses (32); A slot structure corresponding to and matching the locking portion (33) is formed on the columnar boss (32), and the locking portion (33) can be selectively inserted into and removed from the strip groove (212) at one end thereof, and can be matched with and separated from the tooth groove (213), so as to selectively switch the barrel (30) between a state in which it can move relative to the frame (20) and a state in which it is fixed relative to the frame (20).

8. The railway contact network positioning device according to claim 7, characterized in that: A strip-shaped countersunk hole (323) is formed on the outer end surface of the columnar boss (32); a countersunk hole (321) is formed on the inner wall of the cylindrical cavity (31) at a position corresponding to the columnar boss (32); and a light column through hole (322) is formed between the strip-shaped countersunk hole (323) and the countersunk hole (321); The locking portion (33) comprises a column block 1 (331), a column block 2 (332), a spring 1 (333) and a nut body (334); A light column body 2 (2) that can correspond to and match the light column through hole (322) is formed on the column block 1 (331), and the outer diameter of the light column body 2 (2) is smaller than the outer diameter of the column block 1 (331); a threaded hole (4) is formed on the column block 1 (331); A light column body (1) that can be matched with the light column through hole (322) is formed on the second column block (332), and an external thread body (3) and a strip body (5) are respectively formed at both ends of the light column body (1); an external thread body (2) (6) is formed on the end surface of the strip body (5), and a plurality of teeth that can be matched with the tooth grooves (213) are formed on the side wall of the strip body (5); The external threaded body (3) matches the threaded hole (4), and the column block (331) and the column block (332) are connected as a whole, and the two light columns are matched at the light column through hole (322); the sum of the axial lengths of the two light columns is greater than the axial length of the light column through hole (322); the column block (331) is arranged in the countersunk hole (321) and the spring (333) is sleeved on the light column (2); the two ends of the spring (333) are in contact with the inner bottom surface of the countersunk hole (321) and the end surface of the column block (331), so that the strip body (5) can be completely inserted into the strip countersunk hole (323); The free end of the second external threaded body (6) can be extended out of the strip groove (212) and matched with the nut body (334); by adjusting the matching position of the nut body (334) and the second external threaded body (6), the second column block (332) can be pulled to move the strip body (5) into the strip groove (212) and insert the profile teeth into the tooth groove (213).

9. A method for monitoring the state of a railway contact network positioning device based on the railway contact network positioning device according to claim 1 or 2, characterized in that: The steps include: (I) detecting that the second spring (44) touches the sensitive element portion, causing a physical quantity change in the sensitive element portion, which is fed back to the sensor body (51) to generate a real-time sensing signal; (II) analyzing and processing the real-time sensor signal and converting it into a real-time frequency and / or real-time amplitude output signal; (III) analyzing the vibration frequency and / or amplitude signal, and determining, based on the analysis result, whether the amount by which the free end of the elastic limit positioning arm (200) is lifted exceeds a preset range, and / or determining whether the self-oscillation intensity and jump amplitude of the contact line (400) are within a preset range.

10. The method for monitoring the state of a railway contact network positioning device according to claim 9, characterized in that: In step (II), after analyzing and processing the sensor signal, the frequency and amplitude signals formed are converted into digital signals; In step (III), a determination is made by comparing whether the digital signal exceeds the warning threshold or falls within the preset value interval.

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