Urban rail power supply fault detection device and use method thereof

Abstract

The present application discloses a device for detecting power supply faults of urban rail and a method for using the same. When the track needs to be detected, the detector is pushed along the guide groove and pushed onto the fixed seat. The first support rod and the second support rod will not be restricted by the detector, thereby realizing rotation. When the detector is pushed to the fixed seat position, it will also be pushed to the top head, which will drive the insertion rod away from the first mount and the second mount. The limit rod can be away from the extension rod, and the extension rod can be extended, so that the straight frame formed by the extension rod, the first support rod and the second support rod can be placed on the track, and then the detection head can be placed in the socket to contact the track. The staff can independently operate the detector for detection, which is convenient for the staff to use.

Description

Technical Field

[0001] The present application relates to the technical field of track detection devices, and in particular to an urban rail power supply fault detection device and a method for using the same. Background Art

[0002] Urban rail transit power supply fault troubleshooting According to the data, the common causes of urban rail transit power supply faults can be divided into two categories. One is short circuit faults, and the other is faults that occur under abnormal circumstances. Compared with the two, the former causes more serious harm. In order to ensure the smooth operation of the subway, it is necessary to focus on the inspection and troubleshooting of the power supply system, analyze the inducing factors of the fault, and establish a complete fault troubleshooting system based on the actual situation.

[0003] When a fault occurs in an urban rail, staff are required to carry power supply detection equipment to the track location for detection. During the detection, staff are required to overlap the detection head on the tracks on both sides, and then place the instrument on the laid crossbars. During the detection, staff are required to hold the instrument continuously and observe the instrument display while holding it. The entire detection process is extremely inconvenient. The instrument cannot be controlled during handheld detection, and the detection cannot be made more convenient. Summary of the invention

[0004] One of the objectives of the present application is to provide a city rail power supply fault detection device and a method of using the same.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a city rail power supply fault detection device, including a fixed seat, a detector, a first spring, a second spring and a third spring, wherein a first strut and a second strut are respectively provided at both ends of the fixed seat, and an extension rod is provided on the other end of the first strut and the second strut, and a guide groove is provided on the first strut and the second strut, and the guide groove extends to the fixed seat, and a guide wheel is slidably connected in the guide groove, and the guide wheel is slidably connected to the detector, and a limit rod is slidably connected to the moving direction of the detector, and an insertion rod is inserted into the overlapping position of the limit rods of the first strut and the second strut, and a head is provided on the input end of the insertion rod, and the head corresponds to the detector, and a socket is provided on the first strut and the second strut, and a corresponding socket is provided on the extension rod.

[0006] Preferably, the guide groove is arranged in an L-shape as a whole, the guide grooves on both sides of the fixed seat are close to each other, the guide grooves on the first strut and the second strut are away from each other, the guide groove spacing between the first strut and the second strut is larger than the guide groove spacing on the fixed seat, and grooves are provided on the first strut and the second strut.

[0007] Preferably, the first strut and the second strut are both provided with connecting heads, and the connecting heads on the first strut and the second strut are L-shaped as a whole. An extension rod is rotatably connected inside the connecting heads on the first strut and the second strut, and the extension rod is clamped in the grooves of the first strut and the second strut, and the width of the groove is the same as that of the extension rod.

[0008] Preferably, the extension rod is arranged along the length direction of the first strut and the second strut, the groove is opened along the length direction of the first strut and the second strut, the length of the groove is greater than the length of the extension rod, and a limiting rod is connected to one end position of the groove of the first strut and the second strut, and the limiting rods on the first strut and the second strut are arranged in an L shape as a whole.

[0009] Preferably, a second seat is provided on the limiting rod on the first support rod, a first seat is provided on the limiting rod of the second support rod, the first seat and the second seat are arranged in a trapezoidal shape as a whole, the first seat and the second seat are combined to form a rectangle, and the first spring is provided on the first seat and the second seat.

[0010] Preferably, one end of the first spring is detachably connected to the corresponding first mount and second mount, and the other end of the first spring is detachably connected to the first support rod and the second support rod.

[0011] Preferably, the fixing seat is provided with a side seat, the side seat of the fixing seat is rotatably connected with a connecting seat, and the connecting seat is respectively provided on the corresponding first support rod and the second support rod.

[0012] Preferably, a second spring is sleeved on the insertion rod between the top and the fixing seat, one end of the second spring is detachably connected to the fixing seat, and the other end of the second spring is detachably connected to the top.

[0013] Preferably, a convex seat is provided on the detector, a cross bar is provided on the convex seat, a guide seat is slidably connected to the cross bar, the guide seats are located on both sides of the cross bar, and a third spring is sleeved on the cross bar between the guide seats.

[0014] To achieve the above objectives, another technical solution adopted by the present application is: a method for using a urban rail power supply fault detection device, comprising the following steps:

[0015] S1: Before performing power supply fault detection on the urban rail, the detectors on the first support rod and the second support rod are pushed to the guide groove position of the fixed seat. When the detector moves to the fixed seat position, the guide seat of the detector will be away from the guide groove of the first support rod and the second support rod, and the first support rod and the second support rod will not be restricted by the guide seat;

[0016] S2: Before the detector moves to the fixed seat position, it pushes the head on the fixed seat. After being pushed by the detector, the head drives the insertion rod away from the first seat and the second seat, so that the first seat and the second seat can be separated, and the limit rods on the first seat and the second seat will be away from the groove;

[0017] S3: When the limit rod is away from the groove, the extension rod in the groove will not be restricted by the limit rod, and the extension rod can rotate. The extension rod and the corresponding first support rod and second support rod will form a longer I-shaped frame, which will then be placed horizontally on the track. Finally, the detection head is inserted into the socket to contact the track for detection, and the staff can operate the instrument.

[0018] Compared with the prior art, the beneficial effects of this application are:

[0019] The present invention relates to a device for detecting power supply faults of urban rails and a method for using the same. When it is necessary to detect the power supply of urban rails, the detection device is first taken out, and then the detector is pushed, and the detector moves along the guide groove, and the detector is pushed from the guide groove on the first support rod and the second support rod into the guide groove of the fixed seat. When the detector moves into the guide groove of the fixed seat, the guide seat on the detector will be away from the first support rod and the second support rod, and the first support rod and the second support rod will not be restricted by the guide seat, and the first support rod and the second support rod can rotate. Before the detector moves to the fixed seat, it will push the top head on the fixed seat, and the top head will be away from the first mount and the second mount, and the first mount and the second mount will be separated from each other, and the extension rod on the first support rod and the second support rod can rotate. When the extension rod rotates, it will form a straight frame with the first support rod and the second support rod, and the first support rod, the second support rod and the extension rod can be placed on the track, and then the detection head can be inserted into the socket, and the detection head can contact the track, so that the staff does not need to hold the detection head, and can free their hands to operate the instrument.

[0020] The urban rail power supply fault detection device and its use method are provided with grooves on the first support rod and the second support rod, and the corresponding extension rod can be clamped in the groove, and the extension rod can be stored with the corresponding first support rod and the second support rod, so as to reduce the volume of the device and facilitate carrying and use. When in use, the detector will push the top head to move, and when the top head moves, it will drive the insertion rod away from the first seat and the second seat, and the first seat and the second seat will move under the drive of the corresponding first spring, and the limit rods on the first seat and the second seat will extend outward, so as not to block the extension rod, and the extension rod can be extended. When storing, the extension rod is reset, and then the limit rod is reset, and the extension rod is prevented from extending at will under the limit of the limit rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 .

[0022] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 .

[0023] Figure 3 It is a partial cross-sectional view of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the extension rod in the present invention.

[0025] Figure 5 It is a schematic diagram of the unfolding structure of the extension rod in the present invention.

[0026] Figure 6 It is a schematic diagram of the enlarged structure of area A in the present invention.

[0027] Figure 7 It is a schematic diagram of the enlarged structure of area B in the present invention.

[0028] In the figure: 1. first support rod; 2. second support rod; 3. detector; 4. fixing seat; 5. connector; 6. extension rod; 7. socket; 8. guide groove; 9. limit rod; 10. groove; 11. first mount; 12. first spring; 13. insertion rod; 14. second spring; 15. top head; 16. second mount; 17. convex seat; 18. cross bar; 19. third spring; 20. guide wheel; 21. side seat; 22. connecting seat. DETAILED DESCRIPTION

[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] like Figures 1 to 7As shown, the present invention provides a kind of urban rail power supply fault detection device, including a fixed seat 4, a detector 3, a first spring 12, a second spring 14 and a third spring 19, the two ends of the fixed seat 4 are respectively provided with a first strut 1 and a second strut 2, the other ends of the first strut 1 and the second strut 2 are provided with an extension rod 6, the first strut 1 and the second strut 2 are provided with a guide groove 8, the guide groove 8 extends to the fixed seat 4, the guide groove 8 is slidably connected to a guide wheel 20, the guide wheel 20 is slidably connected to the detector 3, the detector 3 is slidably connected to a limit rod 9 in the moving direction, the first strut 1 and the second strut 2 The limit rod 9 is inserted at the overlapping position of the limit rod 9, the input end of the rod 13 is provided with a head 15, the head 15 corresponds to the detector 3, the first strut 1 and the second strut 2 are provided with a socket 7, and the extension rod 6 is provided with a corresponding socket 7. When it is necessary to inspect the track, push the detector 3 along the guide groove 8 and push the detector 3 onto the fixed seat 4. The first support rod 1 and the second support rod 2 will not be restricted by the detector 3, thereby realizing rotation. When the detector 3 is pushed to the position of the fixed seat 4, it will also be pushed to the top head 15, and the top head 15 will drive the insertion rod 13 away from the first seat 11 and the second seat 16, and the limit rod 9 can be away from the extension rod 6, and the extension rod 6 can be extended, so that the I-shaped frame formed by the extension rod 6, the first support rod 1 and the second support rod 2 can be placed on the track, and then the detection head can be placed in the socket 7 to contact the track. The staff can independently operate the detector 3 for detection, which is convenient for the staff to use.

[0033] The guide groove 8 is L-shaped as a whole, the guide grooves 8 on both sides of the fixed seat 4 are close to each other, the guide grooves 8 on the first support rod 1 and the second support rod 2 are away from each other, the distance between the guide grooves 8 of the first support rod 1 and the second support rod 2 is greater than the distance between the guide grooves 8 on the fixed seat 4, and the first support rod 1 and the second support rod 2 are both provided with grooves 10. The setting of the guide groove 8 can realize the guidance of the detector 3, and the detector 3 can move along the guide groove 8 to the fixed seat 4.

[0034] The first support rod 1 and the second support rod 2 are both provided with a connector 5, which is L-shaped as a whole, and the connectors 5 on the first support rod 1 and the second support rod 2 are rotatably connected with an extension rod 6 in the connectors 5 on the first support rod 1 and the second support rod 2, and the extension rod 6 is clamped in the grooves 10 of the first support rod 1 and the second support rod 2, and the grooves 10 have the same width as the extension rod 6. The extension rod 6 can be stored by setting the grooves 10, so that the device is smaller and more convenient to carry.

[0035] During implementation, when it is necessary to detect the power supply of the urban rail, the detection device is first taken out, and then the detector 3 is pushed, and the detector 3 will move along the guide groove 8, and the detector 3 can be pushed from the guide groove 8 on the first support rod 1 and the second support rod 2 to the guide groove 8 of the fixed seat 4. When the detector 3 moves into the guide groove 8 of the fixed seat 4, the guide seat on the detector 3 will move away from the first support rod 1 and the second support rod 2, and the first support rod 1 and the second support rod 2 will not be restricted by the guide seat, and the first support rod 1 and the second support rod 2 can rotate. Before the detector 3 moves to the fixed seat 4, it will push The top head 15 on the movable fixing seat 4 will be away from the first mount 11 and the second mount 16, and the first mount 11 and the second mount 16 will be separated from each other, and the extension rod 6 on the first support rod 1 and the second support rod 2 can be rotated, and when the extension rod 6 rotates, it will form a straight frame with the first support rod 1 and the second support rod 2, and the first support rod 1, the second support rod 2 and the extension rod 6 can be placed on the track, and then the detection head can be inserted into the socket 7, the detection head can contact the track, and the staff does not need to hold the detection head, and can free their hands to operate the instrument.

[0036] like Figures 1 to 7 As shown, the present invention provides a kind of urban rail power supply fault detection device, the extension rod 6 is arranged along the length direction of the first support rod 1 and the second support rod 2, the groove 10 is opened along the length direction of the first support rod 1 and the second support rod 2, the length of the groove 10 is greater than the length of the extension rod 6, and the first support rod 1 and the second support rod 2 are connected to the limit rod 9 at one end of the groove 10, and the limit rod 9 on the first support rod 1 and the second support rod 2 is arranged in an L shape as a whole. The limit rod 9 can limit the extension rod 6, and the extension rod 6 will not easily fall out of the groove 10.

[0037] As an optional solution, in the embodiment of the present invention, the limiting rod 9 on the first support rod 1 is provided with a second mount 16, the limiting rod 9 on the second support rod 2 is provided with a first mount 11, the first mount 11 and the second mount 16 are arranged in a trapezoidal shape as a whole, the first mount 11 and the second mount 16 are combined to form a rectangle, and the first spring 12 is arranged on the first mount 11 and the second mount 16. The first spring 12 can be provided to pull the first mount 11 and the second mount 16, and when the first mount 11 and the second mount 16 are pulled, the limiting rod 9 can be driven to move.

[0038] One end of the first spring 12 is detachably connected to the corresponding first mount 11 and second mount 16, and the other end of the first spring 12 is detachably connected to the first support rod 1 and second support rod 2. The insertion of the insertion rod 13 can be achieved by overlapping the first mount 11 and the second mount 16, thereby fixing the first mount 11 and the second mount 16 at the same time.

[0039] The fixing seat 4 is provided with a side seat 21, and the side seat 21 of the fixing seat 4 is rotatably connected with a connecting seat 22, which is respectively provided on the corresponding first support rod 1 and second support rod 2. The rotation of the first support rod 1 and the second support rod 2 can be realized by connecting the side seat 21 and the connecting seat 22.

[0040] The second spring 14 is sleeved on the insertion rod 13 between the top head 15 and the fixed seat 4, one end of the second spring 14 is detachably connected to the fixed seat 4, and the other end of the second spring 14 is detachably connected to the top head 15. The second spring 14 can pull the top head 15, and the top head 15 will move away from the fixed seat 4 when pushed, and will move closer to the fixed seat 4 when not pushed.

[0041] The detector 3 is provided with a convex seat 17, a cross bar 18 is provided on the convex seat 17, a guide seat is slidably connected to the cross bar 18, the guide seats are located on both sides of the cross bar 18, and a third spring 19 is sleeved on the cross bar 18 between the guide seats. The guide seat can be horizontally moved along the cross bar 18 by setting the cross bar 18, so that the fixed seat 4 can be adjusted simultaneously when it moves into the guide grooves 8 with different spacings.

[0042] During implementation, by opening a groove 10 on the first support rod 1 and the second support rod 2, the corresponding extension rod 6 can be clamped in the groove 10, and the extension rod 6 can be stored with the corresponding first support rod 1 and the second support rod 2, thereby reducing the size of the device and making it convenient to carry and use. When in use, the detector 3 will push the top head 15 to move, and the top head 15 will drive the insertion rod 13 away from the first seat 11 and the second seat 16 when it moves. The first seat 11 and the second seat 16 will move under the drive of the corresponding first spring 12, and the limit rod 9 on the first seat 11 and the second seat 16 will extend outward, so as not to block the extension rod 6, and the extension rod 6 can be extended. When storing, the extension rod 6 will be reset, and then the limit rod 9 will be reset. Under the limit of the limit rod 9, the extension rod 6 is also prevented from extending out at will.

[0043] like Figure 1-7 As shown, a method for using a city rail power supply fault detection device comprises the following steps:

[0044] S1: Before performing power supply fault detection on the urban rail, the detector 3 on the first support rod 1 and the second support rod 2 is pushed to the guide groove 8 of the fixing seat 4. When the detector 3 moves to the fixing seat 4, the guide seat of the detector 3 will be away from the guide groove 8 of the first support rod 1 and the second support rod 2, and the first support rod 1 and the second support rod 2 will not be restricted by the guide seat;

[0045] S2: Before the detector 3 moves to the position of the fixing seat 4, it pushes the head 15 on the fixing seat 4. After being pushed by the detector 3, the head 15 drives the insertion rod 13 away from the first mounting seat 11 and the second mounting seat 16, so that the first mounting seat 11 and the second mounting seat 16 can be separated, and the limiting rods 9 on the first mounting seat 11 and the second mounting seat 16 will be away from the groove 10;

[0046] S3: When the limit rod 9 is away from the groove 10, the extension rod 6 in the groove 10 will not be restricted by the limit rod 9, and the extension rod 6 can rotate. The extension rod 6 and the corresponding first support rod 1 and second support rod 2 will form a longer I-shaped frame, which is then placed horizontally on the track. Finally, the detection head is inserted into the socket 7 to contact the track for detection, and the staff can operate the instrument.

[0047] The working principle of the present invention is as follows: when it is necessary to detect the power supply of the urban rail, the detection device is first taken out, and then the detector 3 is pushed, and the detector 3 will move along the guide groove 8, and the detector 3 is pushed from the guide groove 8 on the first support rod 1 and the second support rod 2 to the guide groove 8 of the fixed seat 4. When the detector 3 moves into the guide groove 8 of the fixed seat 4, the guide seat on the detector 3 will be away from the first support rod 1 and the second support rod 2, and the first support rod 1 and the second support rod 2 will not be restricted by the guide seat, and the first support rod 1 and the second support rod 2 can rotate, and the detector 3 moves to the fixed seat 4. The push head 15 on the fixed seat 4 will be pushed forward, and the push head 15 will move away from the first seat 11 and the second seat 16, and the first seat 11 and the second seat 16 will be separated from each other, and the extension rod 6 on the first support rod 1 and the second support rod 2 will be able to rotate, and when the extension rod 6 rotates, it will form a straight frame with the first support rod 1 and the second support rod 2, and the first support rod 1, the second support rod 2 and the extension rod 6 can be placed on the track, and then the detection head can be inserted into the socket 7, the detection head can contact the track, and the staff does not need to hold the detection head, and can free their hands to operate the instrument.

[0048] By providing a groove 10 on the first support rod 1 and the second support rod 2, the corresponding extension rod 6 can be clamped in the groove 10, and the extension rod 6 can be stored together with the corresponding first support rod 1 and the second support rod 2, thereby reducing the size of the device and making it convenient to carry and use. When in use, the detector 3 will push the top head 15 to move, and the top head 15 will drive the insertion rod 13 away from the first seat 11 and the second seat 16 when it moves. The first seat 11 and the second seat 16 will move under the drive of the corresponding first spring 12, and the limit rod 9 on the first seat 11 and the second seat 16 will extend outward, so as not to block the extension rod 6, and the extension rod 6 can be extended. When storing, the extension rod 6 will be reset, and then the limit rod 9 will be reset. Under the limit of the limit rod 9, the extension rod 6 is also prevented from extending out at will.

[0049] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A device for detecting a power supply fault of an urban rail transit, comprising a fixing seat (4), a detector (3), a first spring (12), a second spring (14) and a third spring (19), characterized in that: The two ends of the fixed seat (4) are respectively provided with a first support rod (1) and a second support rod (2), the other ends of the first support rod (1) and the second support rod (2) are provided with a stretching rod (6), the first support rod (1) and the second support rod (2) are provided with a guide groove (8), the guide groove (8) extends to the fixed seat (4), the guide groove (8) is slidably connected to a guide wheel (20), the guide wheel (20) is slidably connected to the detector (3), the detector (3) is slidably connected to a limit rod (9) in the moving direction, an insertion rod (13) is inserted into the overlapping position of the limit rods (9) of the first support rod (1) and the second support rod (2), a head (15) is provided on the input end of the insertion rod (13), the head (15) and the detector (3) correspond to each other, the first support rod (1) and the second support rod (2) are provided with a socket (7), the stretching rod (6) is provided with a A corresponding socket (7) is provided, the guide groove (8) is arranged in an L-shape as a whole, the guide grooves (8) on both sides of the fixed seat (4) are close to each other, the guide grooves (8) on the first support rod (1) and the second support rod (2) are separated from each other, the distance between the guide grooves (8) of the first support rod (1) and the second support rod (2) is greater than the distance between the guide grooves (8) on the fixed seat (4), the first support rod (1) and the second support rod (2) are both provided with grooves (10), the limiting rod (9) on the first support rod (1) is provided with a second seat (16), the limiting rod (9) on the second support rod (2) is provided with a first seat (11), the first seat (11) and the second seat (16) are arranged in a trapezoidal shape as a whole, the first seat (11) and the second seat (16) are combined into a rectangle, and the first seat (11) and the second seat (16) are provided with a first spring (12).

2. The urban rail power supply fault detection device according to claim 1, characterized in that: The first support rod (1) and the second support rod (2) are both provided with a connecting head (5), and the connecting heads (5) on the first support rod (1) and the second support rod (2) are arranged in an L-shape as a whole. An extension rod (6) is rotatably connected inside the connecting heads (5) on the first support rod (1) and the second support rod (2), and the extension rod (6) is clamped in a groove (10) of the first support rod (1) and the second support rod (2), and the groove (10) has the same width as the extension rod (6).

3. The urban rail power supply fault detection device according to claim 2, characterized in that: The extension rod (6) is arranged along the length direction of the first support rod (1) and the second support rod (2); the groove (10) is opened along the length direction of the first support rod (1) and the second support rod (2); the length of the groove (10) is greater than the length of the extension rod (6); a limit rod (9) is connected to one end position of the groove (10) of the first support rod (1) and the second support rod (2); the limit rod (9) on the first support rod (1) and the second support rod (2) is arranged in an L shape as a whole.

4. The urban rail power supply fault detection device according to claim 1, characterized in that: One end of the first spring (12) is detachably connected to the corresponding first seat (11) and second seat (16), and the other end of the first spring (12) is detachably connected to the first support rod (1) and the second support rod (2).

5. The urban rail power supply fault detection device according to claim 1, characterized in that: The fixing seat (4) is provided with a side seat (21), and the side seat (21) of the fixing seat (4) is rotatably connected with a connecting seat (22), and the connecting seat (22) is respectively provided on the corresponding first support rod (1) and second support rod (2).

6. The urban rail power supply fault detection device according to claim 1, characterized in that: A second spring (14) is sleeved on the insertion rod (13) between the top head (15) and the fixing seat (4); one end of the second spring (14) is detachably connected to the fixing seat (4), and the other end of the second spring (14) is detachably connected to the top head (15).

7. The urban rail power supply fault detection device according to claim 1, characterized in that: The detector (3) is provided with a convex seat (17), the convex seat (17) is provided with a cross bar (18), the cross bar (18) is slidably connected with a guide seat, the guide seat is located on both sides of the cross bar (18), and a third spring (19) is sleeved on the cross bar (18) between the guide seats.

8. A method for using a city rail power supply fault detection device, applied to the detection device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: Before performing power supply fault detection on the urban rail, the detector (3) on the first support rod (1) and the second support rod (2) is pushed to the guide groove (8) position of the fixing seat (4). When the detector (3) moves to the fixing seat (4), the guide seat of the detector (3) will be away from the guide groove (8) of the first support rod (1) and the second support rod (2), and the first support rod (1) and the second support rod (2) will not be restricted by the guide seat; S2: Before the detector (3) moves to the position of the fixed seat (4), the push head (15) on the fixed seat (4) will be pushed. After being pushed by the detector (3), the push head (15) will drive the insertion rod (13) away from the first seat (11) and the second seat (16), so that the first seat (11) and the second seat (16) can be separated, and the limit rods (9) on the first seat (11) and the second seat (16) will be away from the groove (10); S3: When the limit rod (9) is away from the groove (10), the extension rod (6) in the groove (10) will not be restricted by the limit rod (9), and the extension rod (6) can rotate. The extension rod (6) and the corresponding first support rod (1) and second support rod (2) will form a longer straight frame, which is then placed horizontally on the track. Finally, the detection head is inserted into the socket (7) to contact the track for detection, and the staff can operate the instrument.

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