A guide rail straightening device

Abstract

A guide rail shaping and straightening equipment, comprising: a fixing mechanism, a bottom supporting mechanism, a pressing and straightening mechanism and a detection mechanism; both ends of the guide rail are clamped by a guide rail clamping device, then the guide rail is intermittently rotated by an intermittent motor, and the deformation of each end face of the guide rail is detected by the detection mechanism, the bottom supporting mechanism and the pressing and straightening mechanism, and the end face of the guide rail with deformation is straightened, the whole process replaces manual straightening, realizes automatic straightening, ensures that each end face of the guide rail can be straightened, and improves the straightening efficiency; the bottom supporting mechanism and the pressing and straightening mechanism share one motor, ensuring that the movement directions of the bottom supporting mechanism and the pressing and straightening mechanism are consistent when they act, and the position supported by the bottom supporting mechanism and the position pressed by the pressing and straightening mechanism are the same position of the guide rail, ensuring that the guide rail will not produce new deformation in the pressing and straightening process.

Description

Technical Field

[0001] This invention relates to the field of elevator guide rails, and in particular to a guide rail straightening and alignment device. Background Technology

[0002] Elevator guide rails are elevator components made of steel rails and connecting plates. They are divided into car guide rails and counterweight guide rails; and in terms of cross-sectional shape, they are divided into three types: T-shaped, L-shaped, and hollow. While serving a guiding function, the guide rails also bear the impact forces during car braking, elevator braking, and emergency braking of the safety brake. The magnitude of these forces is related to the elevator's load capacity and speed; therefore, the guide rails should be selected according to the elevator's speed and load capacity. The car guide rails are usually called the main rails, and the counterweight guide rails are called the auxiliary rails. Previously, elevator guide rails could only be straightened manually using a straightening machine operated by a single person.

[0003] To this end, Chinese invention patent application number 202321267980.2 discloses an elevator guide rail straightening device, including a housing, a straightening mechanism on the top surface of the housing, and the straightening mechanism including a mounting plate, a cylinder, a clamping plate, a lead screw, a drive motor, a movable plate, a concave plate, a displacement sensor, a hydraulic cylinder and a straightening pressure plate. The straightening mechanism is used in conjunction with the elevator guide rail body. The drive motor drives the output end to rotate the lead screw through a rotating rod, so that the movable plate moves along the lead screw through a slide bar on the bottom connecting plate, and simultaneously drives the movable plate to move. During the displacement process, the movable plate will drive the concave plate to move. During the movement of the concave plate, the displacement sensor will detect the elevator guide rail body. When the displacement of the elevator guide rail body is detected, the concave plate stops moving, and the hydraulic cylinder on one side of the concave plate, which is opposite to the offset position on the elevator guide rail body, will push the straightening pressure plate to squeeze the offset position of the elevator guide rail body.

[0004] However, research on the above invention revealed that the device can only straighten the vertical surface of the guide rail. When the back of the guide rail is deformed, the device cannot detect and straighten it in time.

[0005] Therefore, we need to invent a guide rail shaping and straightening device that can detect and straighten both the front and back sides of the guide rail. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a guide rail straightening and shaping device. The device clamps both ends of the guide rail using a guide rail clamping device, then uses an intermittent motor to drive the guide rail to rotate intermittently. A detection mechanism, a bottom support mechanism, and a pressing and straightening mechanism are employed to detect deformation at each end face of the guide rail and straighten any deformed end faces. This entire process replaces manual straightening, achieving automated straightening and ensuring that all end faces of the guide rail can be straightened, thus improving straightening efficiency. The bottom support mechanism and the pressing and straightening mechanism share a single motor, ensuring that their movement directions are consistent. Furthermore, the support position of the bottom support mechanism and the pressing position of the pressing and straightening mechanism are the same position on the guide rail, guaranteeing that no new deformation occurs during the pressing and straightening process.

[0007] A guide rail straightening and alignment device includes: a fixing mechanism, a bottom support mechanism, a pressing and straightening mechanism, and a detection mechanism;

[0008] The fixing mechanism includes two guide rail clamping devices, which are fixed to the ground. The distance between the two guide rail clamping devices is the length of one guide rail. The two guide rail clamping devices are connected by a rotating shaft. The bottom support mechanism, pressing and straightening mechanism, and detection mechanism are all located between the two guide rail clamping devices, and all three are fixed to the ground by brackets. When the guide rail is fixed to the two guide rail clamping devices, the bottom support mechanism is located directly below the guide rail, the pressing and straightening mechanism is located directly above the guide rail, and the detection mechanism is located in front of the guide rail. The bottom support mechanism and the pressing and straightening mechanism share a motor, and their movement directions and positions are the same.

[0009] Furthermore, the fixing mechanism includes: an intermittent motor, gears, a guide rail clamping device, a rotating shaft, a dual-axis motor, and a fixing bracket;

[0010] The fixing mechanism includes two guide rail clamping devices and two fixing brackets. The two fixing brackets are fixed to the ground. The intermittent motor is fixed to the right fixing bracket. The gears on the intermittent motor mesh with each other. The gears are fixed to a rotating shaft. The rotating shaft is rotatably mounted on the two fixing brackets. The dual-axis motor is fixed to the left guide rail clamping device. The two guide rail clamping devices are connected by a rotating shaft and a belt.

[0011] Furthermore, the guide rail clamping device includes: a circular plate, an upper clamping block, a lower clamping block, a fixed circular plate, a connecting frame, an annular slide groove bracket A, an annular slide groove bracket B, and a pulley;

[0012] The dual-axis motor is fixed on the connecting frame. One motor shaft of the dual-axis motor is fixed to one of the circular plates, and the other circular plate is rotatably mounted on the connecting frame. The circular plate is provided with two arc-shaped grooves, and an upper clamping block and a lower clamping block are slidably installed in the arc-shaped grooves. The rear sides of the upper clamping block and the lower clamping block are slidably mounted on a fixed circular plate. The fixed circular plate is fixed to the connecting frame. The connecting frame is slidably mounted in the annular grooves of annular groove bracket A and annular groove bracket B. Annular groove bracket A and annular groove bracket B are fixed to the ground. The rear side of the connecting frame is fixed to a pulley. The pulley is connected to a rotating shaft via a belt. The other motor shaft of the dual-axis motor is connected to the rotating shaft of the circular plate in another guide rail clamping device via a belt.

[0013] Furthermore, the bottom support mechanism includes: a lead screw A, a telescopic frame A, a telescopic rod A, a lead screw slider assembly A, a fixed plate, a telescopic plate, a spring, and a motor;

[0014] The lead screw A and the motor are fixed to the ground by a bracket. The motor shaft of the motor is fixed to the lead screw A. A telescopic frame A is fixed on the slider of the lead screw A. Two telescopic rods A are provided on both sides of the telescopic frame A. The telescopic rods A are fixed on the slider of the lead screw A. A lead screw slider assembly A is fixed to the top of the telescopic frame A and the telescopic rods A. Two fixed plates and one telescopic plate are fixed on the slider of the lead screw slider assembly A. The lower part of the telescopic plate is fixed to a spring. The other end of the spring is fixed to the slider of the lead screw slider assembly A.

[0015] Furthermore, the pressing and straightening mechanism includes: a lead screw B, a telescopic frame B, a telescopic rod B, and a pressing plate;

[0016] The lead screw B is connected to the lead screw A by a belt. The slider of the lead screw B is fixed with a telescopic frame B and two telescopic rods B. The other end of the telescopic frame B and the two telescopic rods B are fixed together with the pressing plate.

[0017] Furthermore, the detection mechanism includes: a rack and pinion moving mechanism, a lead screw and slider assembly B, an electric cylinder, and a monitoring instrument;

[0018] The rack and pinion moving mechanism is fixed to the ground by a bracket. A lead screw and slider assembly B is fixed to the end of the rack and pinion moving mechanism. An electric cylinder is fixed on the slider of the lead screw and slider assembly B. The telescopic end of the electric cylinder is fixed together with the monitoring instrument.

[0019] Because the present invention adopts the above-described technical solution, the present invention has the following advantages:

[0020] The guide rail is clamped at both ends by a guide rail clamping device, and then the guide rail is driven to rotate intermittently by an intermittent motor. After each 90-degree rotation, the intermittent motor stops rotating for a period of time. Then, the detection mechanism detects the deformation of the end face of the guide rail. When deformation is detected, the bottom support mechanism and the pressing and straightening mechanism straighten the end face of the guide rail. When no deformation is detected, the bottom support mechanism and the pressing and straightening mechanism do not operate, and the intermittent motor continues to drive the guide rail to rotate. The whole process replaces manual straightening, realizes automated straightening, ensures that all end faces of the guide rail can be straightened, and improves straightening efficiency.

[0021] The bottom support mechanism and the pressing and straightening mechanism share a motor, which ensures that the bottom support mechanism and the pressing and straightening mechanism move in the same direction when they are in motion. In addition, the support position of the bottom support mechanism and the pressing position of the pressing and straightening mechanism are the same position of the guide rail, which ensures that the guide rail will not be deformed during the pressing and straightening process. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2-3 This is a schematic diagram of the fixing mechanism of the present invention.

[0024] Figure 4-6 This is a schematic diagram of the guide rail clamping device of the present invention.

[0025] Figure 7-8 This is a schematic diagram of the bottom support mechanism of the present invention.

[0026] Figure 9 This is a schematic diagram of the pressing and straightening mechanism of the present invention.

[0027] Figure 10 This is a schematic diagram of the detection mechanism of the present invention.

[0028] Reference numerals: 1-Fixing mechanism; 2-Bottom support mechanism; 3-Pressing and straightening mechanism; 4-Detection mechanism; 101-Intermittent motor; 102-Gear; 103-Guide rail clamping device; 104-Rotating shaft; 105-Dual-axis motor; 106-Fixed bracket; 201-Lead screw A; 202-Telescopic frame A; 203-Telescopic rod A; 204-Lead screw slider assembly A; 205-Fixed plate; 206-Telescopic plate; 207-Spring; 208-Motor; 301-Lead screw B; 302-Telescopic frame B; 303-Telescopic rod B; 304-Pressing plate; 401-Rack and pinion moving mechanism; 402-Lead screw slider assembly B; 403-Electric cylinder; 404-Monitoring instrument; 1031-Circular plate; 1032-Upper clamping block; 1033-Lower clamping block; 1034-Fixed circular plate; 1035-Connecting frame; 1036-Annular slide groove bracket A; 1037-Annular slide groove bracket B; 1038-Pulley. Detailed Implementation

[0029] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Examples, such as Figure 1-10 As shown, a guide rail straightening and aligning device includes: a fixing mechanism 1, a bottom support mechanism 2, a pressing and straightening mechanism 3, and a detection mechanism 4;

[0031] The fixing mechanism 1 includes two guide rail clamping devices 103, which are fixed on the ground. The distance between the two guide rail clamping devices 103 is the length of one guide rail. The two guide rail clamping devices 103 are connected by a rotating shaft 104. The bottom support mechanism 2, the pressing and straightening mechanism 3, and the detection mechanism 4 are all set between the two guide rail clamping devices 103. The bottom support mechanism 2, the pressing and straightening mechanism 3, and the detection mechanism 4 are all fixed on the ground by brackets. When the guide rail is fixed to the two guide rail clamping devices 103, the bottom support mechanism 2 is located directly below the guide rail, the pressing and straightening mechanism 3 is located directly above the guide rail, and the detection mechanism 4 is located in front of the guide rail. The bottom support mechanism 2 and the pressing and straightening mechanism 3 share a motor 208, and the bottom support mechanism 2 and the pressing and straightening mechanism 3 move in the same direction.

[0032] First, the guide rail is manually placed into the fixing mechanism 1. Then, the guide rail clamping device 103 clamps both ends of the guide rail. Then, the intermittent motor 101 drives the guide rail to rotate intermittently. After rotating 90 degrees, the intermittent motor 101 stops rotating for a period of time. Then, the detection mechanism 4 detects the deformation of the end face of the guide rail. When deformation is detected, the bottom support mechanism 2 and the pressing and straightening mechanism 3 straighten the end face of the guide rail. When no deformation is detected, the bottom support mechanism 2 and the pressing and straightening mechanism 3 do not operate, and the intermittent motor 101 continues to drive the guide rail to rotate, and the end faces of the guide rail are detected in turn.

[0033] In one optional embodiment of the present invention, such as Figure 2-3 As shown, the fixing mechanism 1 includes: an intermittent motor 101, a gear 102, a guide rail clamping device 103, a rotating shaft 104, a dual-axis motor 105, and a fixing bracket 106;

[0034] The fixing mechanism 1 includes two guide rail clamping devices 103 and two fixing brackets 106. The two fixing brackets 106 are fixed on the ground. The intermittent motor 101 is fixed on the right fixing bracket 106. The gear on the intermittent motor 101 meshes with the gear 102. The gear 102 is fixed on the rotating shaft 104. The rotating shaft 104 is rotatably mounted on the two fixing brackets 106. The dual-axis motor 105 is fixed on the left guide rail clamping device 103. The two guide rail clamping devices 103 are connected to each other through the rotating shaft 104 and the belt.

[0035] After the guide rail is placed into the two guide rail clamping devices 103, the dual-axis motor 105 rotates, driving the upper clamping block 1032 and the lower clamping block 1033 in the two guide rail clamping devices 103 to clamp the guide rail. After clamping, the intermittent motor 101 starts, driving the gear 102 to rotate, thereby driving the rotating shaft 104 to rotate, thereby driving the connecting frame 1035 in the two guide rail clamping devices 103 to rotate, thereby driving the guide rail to rotate. When the guide rail rotates 90 degrees, the intermittent motor 101 stops rotating for a period of time, and then starts rotating again.

[0036] In one optional embodiment of the present invention, such as Figure 4-6 As shown, the guide rail clamping device 103 includes: a circular plate 1031, an upper clamping block 1032, a lower clamping block 1033, a fixed circular plate 1034, a connecting frame 1035, an annular slide groove bracket A1036, an annular slide groove bracket B1037, and a pulley 1038.

[0037] A dual-axis motor 105 is fixed to a connecting frame 1035. One motor shaft of the dual-axis motor 105 is fixed to one of the circular plates 1031, and the other circular plate 1031 is rotatably mounted on the connecting frame 1035. Two arc-shaped grooves are provided on the circular plate 1031, and an upper clamping block 1032 and a lower clamping block 1033 are slidably installed within these grooves. The rear sides of the upper clamping block 1032 and the lower clamping block 1033 are slidably mounted on a fixed circular plate 1034, which is fixed to the connecting frame 1035. The connecting frame 1035 is slidably installed in the annular grooves of the annular groove brackets A1036 and B1037. The annular groove brackets A1036 and B1037 are fixed on the ground. The rear side of the connecting frame 1035 is fixed to the pulley 1038. The pulley 1038 is connected to the rotating shaft 104 via a belt. The other motor shaft of the dual-axis motor 105 is connected to the rotating shaft of the circular plate 1031 in another guide rail clamping device 103 via a belt.

[0038] The guide rail is manually placed in a specific position. To fix the two ends of the guide rail, the dual-axis motor 105 rotates, driving the circular plate 1031 to rotate. This causes the circular plate 1031 to drive the upper clamping block 1032 and the lower clamping block 1033 to close, thus clamping the guide rail. The intermittent motor 101 drives the pulley 1038 to rotate, which in turn drives the connecting frame 1035 to rotate, which in turn drives the guide rail to rotate. This facilitates the detection of whether different surfaces of the guide rail are deformed.

[0039] In one optional embodiment of the present invention, such as Figure 7-8 As shown, the bottom support mechanism 2 includes: a lead screw A201, a telescopic frame A202, a telescopic rod A203, a lead screw slider assembly A204, a fixed plate 205, a telescopic plate 206, a spring 207, and a motor 208.

[0040] The lead screw A201 and the motor 208 are fixed to the ground by a bracket. The motor shaft of the motor 208 is fixed to the lead screw A201. A telescopic frame A202 is fixed on the slider of the lead screw A201. Two telescopic rods A203 are provided on both sides of the telescopic frame A202. The telescopic rods A203 are fixed on the slider of the lead screw A201. A lead screw slider assembly A204 is fixed on the top of the telescopic frame A202 and the telescopic rods A203. Two fixing plates 205 and a telescopic plate 206 are fixed on the slider of the lead screw slider assembly A204. The lower part of the telescopic plate 206 is fixed to a spring 207. The other end of the spring 207 is fixed to the slider of the lead screw slider assembly A204.

[0041] The motor 208 rotates, driving the slider on the lead screw A201 to move, thereby moving the fixed plate 205 and the telescopic plate 206 to the position where the guide rail needs to be straightened. Then, the lead screw and slider assembly A204 makes fine adjustments to the fixed plate 205 and the telescopic plate 206. Then, the telescopic frame A202 drives the lead screw and slider assembly A204 up and down, which in turn drives the fixed plate 205 and the telescopic plate 206 up and down, so that the telescopic plate 206 fits against the lower end face of the guide rail. During the process of pressing down to straighten the guide rail, the spring 207 under the telescopic plate 206 can buffer the pressure and provide support to the bottom of the guide rail, preventing the guide rail from being directly pressed and deformed. When the guide rail is pressed down to straighten, because steel has a certain degree of toughness, the guide rail will have a certain range of return after being pressed down. Therefore, the spring 207 can keep the telescopic plate 206 in contact with the guide rail.

[0042] In one optional embodiment of the present invention, such as Figure 9 As shown, the pressing and straightening mechanism 3 includes: a lead screw B301, a telescopic frame B302, a telescopic rod B303, and a pressing plate 304;

[0043] The lead screw B301 is connected to the lead screw A201 by a belt. The slider of the lead screw B301 is fixed with a telescopic frame B302 and two telescopic rods B303. The other end of the telescopic frame B302 and the two telescopic rods B303 are fixed together with the pressing plate 304.

[0044] When the motor 208 rotates, it drives the lead screw A201 to rotate, which in turn drives the lead screw B301 to rotate. This causes the lead screw B301 to move the pressing plate 304 to the position where the guide rail needs to be straightened. Then, the telescopic frame B302 drives the pressing plate 304 to move downward, thereby pressing the pressing plate 304 down on the deformed part of the guide rail to straighten the guide rail.

[0045] In one optional embodiment of the present invention, such as Figure 10 As shown, the detection mechanism 4 includes: a rack and pinion moving mechanism 401, a lead screw and slider assembly B402, an electric cylinder 403, and a monitoring instrument 404;

[0046] The rack and pinion moving mechanism 401 is fixed to the ground by a bracket. The end of the rack and pinion moving mechanism 401 is fixed with a screw and slider assembly B402. An electric cylinder 403 is fixed on the slider of the screw and slider assembly B402. The telescopic end of the electric cylinder 403 is fixed together with the monitoring instrument 404.

[0047] First, the rack and pinion moving mechanism 401 moves the monitor 404 above the guide rail. Then, the electric cylinder 403 moves the monitor 404 down, so that the monitor 404 fits against the side of the guide rail that needs to be inspected. The lead screw and slider assembly B402 moves the electric cylinder 403 and the monitor 404, so that the monitor 404 can inspect the guide rail.

[0048] It should be noted that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in during use. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

Claims

1. A guide rail shaping and straightening device, characterized in that, include: Fixing mechanism (1), bottom support mechanism (2), pressing and straightening mechanism (3) and testing mechanism (4); The fixing mechanism (1) includes two guide rail clamping devices (103), which are fixed on the ground. The distance between the two guide rail clamping devices (103) is the length of one guide rail. The two guide rail clamping devices (103) are connected by a rotating shaft (104). The bottom support mechanism (2), the pressing and straightening mechanism (3), and the detection mechanism (4) are all located between the two guide rail clamping devices (103). The bottom support mechanism (2) and the pressing and straightening mechanism (3) are also located between the two guide rail clamping devices (103). Both the structure (3) and the detection mechanism (4) are fixed on the ground with brackets. When the guide rail is fixed to the two guide rail clamping devices (103), the bottom support mechanism (2) is located directly below the guide rail, the pressing and straightening mechanism (3) is located directly above the guide rail, and the detection mechanism (4) is located in front of the guide rail. The bottom support mechanism (2) and the pressing and straightening mechanism (3) share a motor (208). The bottom support mechanism (2) and the pressing and straightening mechanism (3) have the same direction of movement and position. The fixing mechanism (1) includes: an intermittent motor (101), a gear (102), a guide rail clamping device (103), a rotating shaft (104), a dual-axis motor (105), and a fixing bracket (106); the fixing mechanism (1) includes two guide rail clamping devices (103) and two fixing brackets (106), the two fixing brackets (106) are fixed on the ground, the intermittent motor (101) is fixed on the right fixing bracket (106), the gear on the intermittent motor (101) meshes with the gear (102), the gear (102) is fixed on the rotating shaft (104), the rotating shaft (104) is rotatably mounted on the two fixing brackets (106), the dual-axis motor (105) is fixed on the left guide rail clamping device (103), and the two guide rail clamping devices (103) are connected to each other by the rotating shaft (104) and a belt.

2. The guide rail shaping and straightening equipment according to claim 1, characterized in that, The guide rail clamping device (103) includes: a circular plate (1031), an upper clamping block (1032), a lower clamping block (1033), a fixed circular plate (1034), a connecting frame (1035), an annular slide groove bracket A (1036), an annular slide groove bracket B (1037), and a pulley (1038). The dual-axis motor (105) is fixed on the connecting frame (1035). One motor shaft of the dual-axis motor (105) is fixed to one of the circular plates (1031), and the other circular plate (1031) is rotatably mounted on the connecting frame (1035). The circular plate (1031) is provided with two arc-shaped grooves, and an upper clamping block (1032) and a lower clamping block (1033) are slidably installed in the arc-shaped grooves. The rear sides of the upper clamping block (1032) and the lower clamping block (1033) are slidably mounted on a fixed circular plate (1034). The fixed circular plate (1034) is fixed to the connecting frame (1035). The connecting frame (1035) is slidably installed in the annular grooves of the annular groove bracket A (1036) and the annular groove bracket B (1037). The annular groove bracket A (1036) and the annular groove bracket B (1037) are fixed on the ground. The rear side of the connecting frame (1035) is fixed together with the pulley (1038). The pulley (1038) is connected to the rotating shaft (104) through the belt. The other motor shaft of the dual-axis motor (105) is connected to the rotating shaft of the circular plate (1031) in another guide rail clamping device (103) through the belt.

3. The guide rail shaping and straightening equipment according to claim 1, characterized in that, The bottom support mechanism (2) includes: a lead screw A (201), a telescopic frame A (202), a telescopic rod A (203), a lead screw slider assembly A (204), a fixed plate (205), a telescopic plate (206), a spring (207), and a motor (208). The lead screw A (201) and the motor (208) are fixed to the ground by a bracket. The motor shaft of the motor (208) is fixed to the lead screw A (201). A telescopic frame A (202) is fixed on the slider of the lead screw A (201). Two telescopic rods A (203) are provided on both sides of the telescopic frame A (202). The telescopic rods A (203) are fixed on the slider of the lead screw A (201). A lead screw slider assembly A (204) is fixed on the top of the telescopic frame A (202) and the telescopic rods A (203). Two fixing plates (205) and a telescopic plate (206) are fixed on the slider of the lead screw slider assembly A (204). The lower part of the telescopic plate (206) is fixed to a spring (207). The other end of the spring (207) is fixed together with the slider of the lead screw slider assembly A (204).

4. The guide rail shaping and straightening equipment according to any one of claims 1-3, characterized in that, The pressing and straightening mechanism (3) includes: lead screw B (301), telescopic frame B (302), telescopic rod B (303) and pressing plate (304). The lead screw B (301) is connected to the lead screw A (201) by a belt. The slider of the lead screw B (301) is fixed with a telescopic frame B (302) and two telescopic rods B (303). The other end of the telescopic frame B (302) and the two telescopic rods B (303) is fixed together with the pressing plate (304).

5. The guide rail shaping and straightening equipment according to claim 4, characterized in that, The detection mechanism (4) includes: rack and pinion moving mechanism (401), lead screw and slider group B (402), electric cylinder (403) and monitoring instrument (404). The rack and pinion moving mechanism (401) is fixed to the ground by a bracket. A screw and slider assembly B (402) is fixed to the end of the rack and pinion moving mechanism (401). An electric cylinder (403) is fixed on the slider of the screw and slider assembly B (402). The telescopic end of the electric cylinder (403) is fixed together with the monitoring instrument (404).

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