Crane beam track offset detection device based on rotating rod
By designing a crane beam track offset detection device based on a rotating rod, and using the measurement claws combined with the main ruler, the secondary ruler and the rotating rod for measurement, the problems of low measurement accuracy and high safety risks in the prior art are solved, and efficient, accurate and safe track offset detection is achieved.
Patent Information
- Application Number
- CN202421434864.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-21
AI Technical Summary
When detecting the deviation of the crane beam track, the measurement accuracy is low, and it is necessary to climb over the guardrail and enter the high altitude area. There is a safety risk, and the inspection cost and cycle are relatively high.
A crane beam track offset detection device based on a rotating rod is designed. The measurement is carried out through the measurement claws combined with the main ruler, the secondary ruler and the rotating rod, so as to reduce the cross-sectional size of the measuring device, and can pass through the gaps in the guardrail grid to prevent people from entering the driving operation area for measurement.
It improves the accuracy and efficiency of measurement, reduces operational safety risks, reduces detection costs and cycles, and adapts to different usage scenarios at the same time.
Smart Images
Figure CN222612784U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of civil engineering detection, in particular to a crane beam track deviation detection device based on a rotating rod. Background Art
[0002] The crane beam is a load-bearing structure that supports the operation of the bridge crane. The track laid on the upper flange of the crane beam enables the crane to run back and forth on the crane beam. During the design and installation process of the track on the crane beam, the center of the track and the center of the crane beam web below the track need to be on the same straight line. However, the track will be offset due to the influence of construction and installation deviations and the long-term influence of the large horizontal force of the bridge crane after it is put into use. The eccentricity of the track will cause the track to gnaw, driving vibration, and generate a large bending moment outside the plane of the crane beam, thereby causing fatigue cracking of the upper flange of the crane beam. Therefore, track offset is a key inspection item in track construction and installation, daily operation and maintenance inspections, and special inspections of crane beams.
[0003] At present, steel tape measures are mainly used to measure the offset value of the track center. When using steel tape measures, it is difficult to ensure the alignment of the starting end and the relative parallelism of the distance to be measured and the tape measure, which leads to human errors in the measurement. In addition, this method also requires climbing over the guardrails of the crane beam to enter the driving area and measure at a high altitude. Not only do personnel need to wear safety protection devices to prevent falling from heights, but track stops also need to be installed on the track to prevent accidents such as crushing and casualties caused by untimely evacuation of personnel when the vehicle passes.
[0004] The method of measuring with a steel tape measure is not only less accurate, but also requires more safety protection tools and safety assistance personnel. At the same time, due to the greater safety risks, the corresponding entry procedures and safety education processes are relatively cumbersome, and the inspection cost and inspection cycle will increase significantly. In addition, if there are pipelines or equipment placed within a certain height range below the guardrail, it will be impossible to pass any measuring tools through the gap in the guardrail. Even if there are some applicable measuring tools, personnel are still required to enter the driving area to perform measurement operations. Utility Model Content
[0005] In view of the problems existing in the prior art, the utility model provides a crane beam track deviation detection device based on a rotating rod.
[0006] The utility model provides a crane beam track deviation detection device based on a rotating rod, comprising: a main ruler and a secondary ruler, the main ruler and the secondary ruler are split structures; the main ruler has a scale for length measurement on its upper surface, one end of which is vertically fixedly mounted with a first measuring claw facing downward, the other end is rotatably connected to the rotating rod through a rotating hinge and is fixed in two mutually horizontal and vertical directions, the inner surface of the first measuring claw is flush with the zero scale line of the scale; the secondary ruler has a second measuring claw vertically fixedly mounted with one end facing downward, an auxiliary positioning plate is vertically fixedly mounted with the same end facing upward, the outer surface of the second measuring claw is flush with the outer surface of the auxiliary positioning plate, and both are perpendicular to the secondary ruler body.
[0007] According to a crane beam track deviation detection device based on a rotating rod of the utility model, the other end of the main scale is provided with a positioning groove connected to the rotating rod, and the positioning groove is provided with clamping grooves in the horizontal direction and the vertical direction of the main scale; one end of the rotating rod is provided with the rotating hinge, and the rotating hinge is provided with a positioning pin, and when the rotating rod and the main scale are rotated to be parallel and perpendicular to each other, the positioning pin is fixed to the clamping groove by a spring, so that the rotating rod and the main scale are fixed in the parallel and perpendicular directions respectively.
[0008] According to the utility model, a crane beam track deviation detection device based on a rotating rod is provided with a positioning groove connected to the main scale at one end of the rotating rod, and the positioning groove is provided with clamping grooves in the horizontal direction and the vertical direction of the rotating rod; the other end of the main scale is provided with the rotating hinge, and the rotating hinge is provided with a positioning pin. When the rotating rod and the main scale are rotated to be parallel and perpendicular to each other, the positioning pin is fixed to the clamping groove by a spring, so that the rotating rod and the main scale are fixed in the parallel and perpendicular directions respectively.
[0009] According to a crane beam track deviation detection device based on a rotating rod of the utility model, the length of the first measuring claw is greater than the length of the second measuring claw.
[0010] According to a crane beam track deviation detection device based on a rotating rod of the utility model, the main ruler and the auxiliary ruler are both square rods, the main ruler and the first measuring claw form an L-shaped structure, and the auxiliary ruler and the second measuring claw form an L-shaped structure.
[0011] According to a crane beam track deviation detection device based on a rotating rod of the utility model, the first measuring claw is a square rod with the same width as the main ruler, and the second measuring claw is a square rod with the same width as the secondary ruler.
[0012] According to the utility model of a crane beam track deviation detection device based on a rotating rod, a level is installed on the upper surface of the main ruler and / or the auxiliary ruler.
[0013] According to the crane beam track deviation detection device based on the rotating rod of the utility model, the main material of the main scale and the auxiliary scale includes aluminum alloy or stainless steel.
[0014] According to a crane beam track deviation detection device based on a rotating rod of the utility model, an outer surface of the other end of the rotating rod is paved with a hand-held insulating rubber sleeve.
[0015] According to a crane beam track deviation detection device based on a rotating rod of the utility model, the length range of the main ruler and the rotating rod includes 0.5 meters to 2 meters, the length range of the secondary ruler includes 1 meter to 3 meters, and the length range of the first measuring claw includes 100 millimeters to 500 millimeters.
[0016] The utility model provides a crane beam track deviation detection device based on a rotating rod. Through the main scale, the auxiliary scale and the rotating rod combined with two measuring claws for measurement, the cross-sectional dimensions of the measuring device can be miniaturized, which is conducive to passing through most of the gaps in the guardrail grid. Personnel do not need to enter the vehicle operation area for operation, and the structure is simple and easy to process. In addition, based on the first measuring claw and the second measuring claw perpendicular to the main body, it is conducive to simultaneously closely fitting with the track to be measured and the upper flange of the vehicle beam, thereby ensuring the accuracy of the measurement, and the measurement is efficient, convenient and safe. At the same time, based on the fixing of the rotating rod and the main ruler in the vertical and horizontal directions, it can flexibly cope with different usage scenarios such as passing through the crane beam guardrail and being unable to pass through the crane beam guardrail. In summary, the device avoids personnel climbing over the crane beam guardrail to enter the vehicle operation area for measurement, reduces the operational safety risk, improves the detection efficiency, and also ensures the accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a structural schematic diagram of a crane beam track deviation detection device based on a rotating rod provided by the utility model;
[0019] Figure 2 This is one of the application scenario schematic diagrams of the crane beam track deviation detection device based on the rotating rod provided by the utility model;
[0020] Figure 3 It is a schematic diagram of the main scale structure of the crane beam track deviation detection device based on the rotating rod provided by the utility model;
[0021] Figure 4 This is the second schematic diagram of the application scenario of the crane beam track deviation detection device based on the rotating rod provided by the utility model;
[0022] Figure 5 It is a schematic diagram of the connection of the rotating rod of the crane beam track deviation detection device based on the rotating rod provided by the utility model;
[0023] Figure 6 It is a schematic diagram of the rotary hinge structure of the crane beam track deviation detection device based on the rotary rod provided by the utility model;
[0024] Explanation of the accompanying drawings: 1. Crane beam; 2. Upper flange of crane beam; 3. Track; 4. Main scale; 5. Auxiliary scale; 6. Main scale measuring claw (first measuring claw); 7. Rotating rod; 8. Auxiliary scale measuring claw (second measuring claw); 9. Level; 10. Auxiliary positioning plate; 11. Scale surface; 12. Rotating hinge; 13. Positioning pin; 14; Spring; 15. Positioning slot. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] Regarding the problem of requiring personnel to enter the driving area for measurement operations, we considered using a customized large vernier caliper to measure the track deviation. Although personnel can operate outside the guardrail to avoid entering the driving area, the overall cross-section of the measuring ruler is large, which makes it difficult to carry during operation. The grid space on the guardrail may not support the normal passage of the measuring ruler. When encountering such a situation, it is inevitable that personnel need to enter the driving area for measurement operations. In addition, if there are pipelines or equipment within a certain height range below the guardrail, it will be impossible to pass any measuring tools through the gap in the guardrail.
[0027] Combine the following Figure 1-Figure 6 The utility model is described in detail. The utility model is a crane beam track deviation detection device based on a rotating rod. Figure 1 Schematic diagram of the structure of the crane beam track deviation detection device based on the rotating rod provided by the utility model, such as Figure 1As shown, the crane beam track deviation detection device based on the rotating rod provided by the utility model comprises: a main ruler 4 and a secondary ruler 5, wherein the main ruler 4 and the secondary ruler 5 are split structures; a scale 11 for length measurement is provided on the upper surface of the main ruler 4, a first measuring claw 6 is vertically fixedly installed downward at one end, and the other end is rotatably connected to the rotating rod 7 through a rotating hinge 12 and fixed in two horizontal and vertical directions relative to each other, and the inner surface of the first measuring claw 6 is flush with the zero scale line of the scale 11; a second measuring claw 8 is vertically fixedly installed downward at one end of the secondary ruler 5, and an auxiliary positioning plate 10 is vertically fixedly installed upward at the same end, and the outer surface of the second measuring claw 8 is flush with the outer surface of the auxiliary positioning plate 10, and both are perpendicular to the main body of the secondary ruler 5.
[0028] For the convenience of description, the concept of up and down is added in the present invention. It should be noted that the up and down are relative concepts for the convenience of description in conjunction with the drawings, rather than limiting the structure, and the up and down can also be interchanged. In addition, the inner surface and outer surface of the measuring claw mentioned are relative to the user. When the user holds the other end of the main ruler 4 or the auxiliary ruler 5, the measuring claw facing the holding part is the inner surface, and the outer surface away from the holding part is the outer surface.
[0029] Since the top surface of the track 3 and the upper flange 2 of the crane beam are not at the same horizontal height, the first measuring claw 6 is designed to facilitate accurate fixing of the upper flange edge measurement start end during the measurement process. The length of the first measuring claw 6 can be set in the range of 100mm-500mm, and the first measuring claw 6 is firmly connected to the main scale 4. The second measuring claw 8 is used to locate the bottom edge position of the track 3. In order to facilitate positioning and reading the scale surface scale 11 of the main scale 4, the auxiliary positioning plate 10 is designed to be close to the bottom edge side of the track 3 with the second measuring claw 8 and on the same plane, and the auxiliary positioning plate 10 is firmly connected to the second measuring claw 8.
[0030] The device is used for detecting the track deviation of the crane beam 1. Direct measurement can be adopted. On-site personnel can measure the track deviation with the help of the device outside the guardrail, without the need for personnel to climb over the crane beam guardrail to enter the driving operation area for operation.
[0031] This product can be used in the following two situations:
[0032] 1. When the gap under the guardrail can pass through the detection device normally, such as Figure 2As shown, the specific operation process is: determine the position where the track deviation needs to be measured; enable the rotating rod 7 to rotate normally (optionally by pressing the positioning pins 13 on both sides of the rotating hinge 12), and when the rotating rod 7 is rotated to be horizontal with the main ruler 4 (as in the following embodiment, it can be optionally achieved by loosening the positioning pins 13 so that it falls into the positioning slot 15 with a horizontal angle of 0 degrees), lock the rotating rod 7 so that it cannot rotate; pass the end of the main ruler 4 with the first measuring claw 6 through the gap of the guardrail grid and extend out of the edge of the upper flange 2 of the crane beam; hook the first measuring claw 6 of the main ruler 4 on the edge of the upper flange 2 of the crane beam and fit the bottom surface of the main ruler 4 to the track surface; and insert the second measuring claw 8 of the auxiliary ruler 5. One end of the measuring claw 8 passes through the gap of the guardrail grid and presses the second measuring claw 8 against the bottom edge of the track; the main scale 4 and the auxiliary scale 5 are brought close together and kept in a horizontal state (as in the following embodiment, this can be achieved by adjusting the level 9 on the two scale surfaces); the reader reads the scale scale Lc on the main scale 4 according to the auxiliary positioning plate 10 on the upper end of the measuring claw of the auxiliary scale 5; the track offset value ΔL=Lc-(Le+L0) / 2 is calculated according to the width Le of the flange plate on the crane beam and the width L0 of the track bottom surface; when ΔL=0, it means that the track has no eccentricity, when ΔL is a negative value, it means that the track is offset in the direction of the vehicle, and when ΔL is a positive value, it means that the track is offset in the direction of the vehicle.
[0033] 2. When there are pipelines or equipment placed within a certain height range below the guardrail, it is impossible to pass the detection device through the gap of the guardrail. Figure 3 and Figure 4 As shown, the specific operation process is as follows: determine the position where the track deviation needs to be measured; rotate the rotating rod 7 to be perpendicular to the main scale 4 (as in the following embodiment, the positioning pins 13 on both sides of the rotating hinge 12 can be pressed until the rotating rod 7 can rotate normally; when the rotating rod 7 is rotated to be perpendicular to the main scale 4, release the positioning pins 13 so that they fall into the 90-degree positioning slots 15 to lock the rotating rod 7 and prevent it from rotating); move the main scale 4 over the guardrail as a whole, hold one end of the rotating rod 7, and adjust the measuring claws of the main scale 4 to extend out of the edge of the upper flange 2 of the crane beam. The first measuring claw 6 of the main ruler 4 is hooked on the edge of the upper flange 2 of the crane beam and the bottom surface of the main ruler 4 is fitted to the track surface; the secondary ruler 5 is passed over the guardrail and the tip of the second measuring claw 8 is pressed against the bottom edge of the track; the main ruler 4 and the secondary ruler 5 are brought close together and the main ruler 4 is adjusted (this can be achieved by the level 9 on the ruler surface) to keep it horizontal; the reading personnel reads the scale Lc on the main ruler 4 according to the intersection point of the secondary ruler 5 and the main ruler 4; according to the width Le of the upper flange plate of the crane beam and the length L of the measuring claw of the secondary ruler 5 d The track offset value ΔL is calculated by using the track bottom width L0 = Lc-L d -(Le+L0) / 2; when ΔL=0, it means the track has no eccentricity; when ΔL is a negative value, it means the track is offset in the direction of the vehicle; when ΔL is a positive value, it means the track is offset out of the direction of the vehicle.
[0034] The utility model of the crane beam track deviation detection device based on the rotating rod can realize the miniaturization of the cross-sectional dimensions of the measuring device by measuring through the main scale, the auxiliary scale and the rotating rod in combination with two measuring claws, so as to facilitate passing through most of the gaps in the guardrail grid, and personnel do not need to enter the driving operation area for operation, and the structure is simple and easy to process. In addition, based on the first measuring claw and the second measuring claw perpendicular to the main body, it is conducive to simultaneously closely fitting with the track to be measured and the upper flange of the vehicle beam, so as to ensure the accuracy of the measurement. The auxiliary positioning plate is used for reading, which can solve the problem of measurement difficulties and measurement errors caused by the measurement starting point and the end point not being in the same horizontal plane, improves the measurement accuracy, and has high measurement efficiency, convenience and safety. At the same time, based on the fixing of the rotating rod and the main scale in the vertical and horizontal directions, it can flexibly cope with different usage scenarios such as passing through the crane beam guardrail and not being able to pass through the crane beam guardrail. In summary, the device avoids personnel climbing over the crane beam guardrail to enter the driving operation area for measurement, reduces the operational safety risk, improves the detection efficiency, and also ensures the accuracy of the measurement.
[0035] In some embodiments, the other end of the main scale 4 is provided with a positioning groove 15 connected to the rotating rod 7, and the positioning groove 15 is provided with a card slot in the horizontal direction and the vertical direction of the main scale 4; one end of the rotating rod 7 is provided with a rotating hinge 12, and the rotating hinge 12 is provided with a positioning pin 13. When the rotating rod 7 and the main scale 4 are rotated to be parallel and perpendicular to each other, the positioning pin 13 is fixed to the card slot by a spring, so that the rotating rod 7 and the main scale 4 are fixed in the parallel and perpendicular directions respectively.
[0036] like Figure 5 and Figure 6 As shown, a positioning groove connected to the rotating rod 7 is provided at one end of the main scale 4, and the positioning groove is provided with a card slot in the horizontal direction and the vertical direction of the main scale 4, which is used to lock the rotating rod 7 in the horizontal direction and the vertical direction with the main scale 4 for stable use. For details, please refer to the above embodiment.
[0037] In some embodiments, a positioning groove 15 connected to the main scale 4 is provided at one end of the rotating rod 7, and the positioning groove 15 is provided with a card slot in the horizontal direction and the vertical direction of the rotating rod 7; the other end of the main scale 4 is provided with a rotating hinge 12, and a positioning pin 13 is provided on the rotating hinge 12. When the rotating rod 7 and the main scale 4 are rotated to parallel and vertical directions, the positioning pin 13 is fixed to the card slot by a spring 14, thereby fixing the rotating rod 7 and the main scale 4 in the parallel and vertical directions respectively.
[0038] Specifically, the rotating hinge 12 can be set at the other end of the main scale, and the positioning groove 15 can be set on the rotating rod 7, that is, the two are interchanged. For details, please refer to the above embodiment and will not be repeated here.
[0039] In some embodiments, the length of the first measuring claw 6 is greater than the length of the second measuring claw 8. Since the top surface of the track 3 and the upper flange 2 of the crane beam 1 are not at the same horizontal height, the utility model adopts a design in which the length of the first measuring claw 6 is greater than the second measuring claw 8, ensuring that the edge measurement start end of the upper flange 2 is accurately fixed during the measurement process. Based on this, the length of the first measuring claw 6 is greater than the second measuring claw 8, which solves the problem of measurement difficulties and measurement errors caused by the measurement start and end points not being in the same horizontal plane, thereby improving the measurement accuracy.
[0040] In some embodiments, the main body of the main ruler 4 and the secondary ruler 5 are both square rods, the main body of the main ruler 4 and the first measuring claw 6 form an L-shaped structure, and the main body of the secondary ruler 5 and the second measuring claw 8 form an L-shaped structure. Among them, the square rod shape referred to in the utility model is a structure with a rectangular cross section, that is, the main body of the main ruler 4 is a structure with a rectangular cross section, and the first measuring claw 6 can also be a square rod-shaped structure, and the two are vertically combined together to be installed in an L shape. The secondary ruler 5 also adopts the same structure, and the main body and the second measuring claw 8 are vertically combined together to be installed in an L shape. Based on this structure, it is convenient for the user to hold one end of the main ruler 4 and the secondary ruler 5, and hook the part to be measured with the measuring claw at the other end to fix it, so as to combine the main ruler 4 and the secondary ruler 5 for measurement.
[0041] In some embodiments, the first measuring claw 6 is a square rod with the same width as the main ruler 4, and the second measuring claw 8 is a square rod with the same width as the secondary ruler 5. Considering that the main ruler 4 and the secondary ruler 5 need to pass through obstacles such as the guardrail of the crane beam 1, the widths of the main ruler 4 and the secondary ruler 5 are consistent with their respective measuring claws, thereby avoiding problems such as being blocked when passing through obstacles.
[0042] In some embodiments, a level 9 is installed on the upper surface of the main ruler 4 and / or the secondary ruler 5. The level 9 facilitates the inspection personnel to keep the main ruler 4 and the secondary ruler 5 horizontal and vertical during the measurement process, thereby ensuring the accuracy of the measurement. Specifically, the level 9 can be installed on the main ruler 4, installed on the secondary ruler 5, or installed on both the main ruler 4 and the secondary ruler 5.
[0043] In some embodiments, the main material of the main ruler 4 and the auxiliary ruler 5 includes aluminum alloy or stainless steel. In order to ensure the rigidity of the measuring device, the main body material is selected from aluminum alloy or stainless steel to avoid deformation and thus ensure the measurement accuracy. Of course, the first measuring claw 6, the second measuring claw 8 and the auxiliary positioning plate 10 can also be made of the same material.
[0044] In some embodiments, the outer surface of the other end of the rotating rod 7 is covered with a hand-held insulating rubber sleeve. The other end of the rotating rod 7 refers to the end that is different from the end connected to the main ruler 4, which is the handheld end for measurement. The insulating rubber sleeve is provided at the other end of the rotating rod 7, that is, the operator's hand-held range, to avoid the risk of high-voltage electric shock that may be encountered during the measurement process, and to ensure the safety of the measurement personnel.
[0045] In some embodiments, the length range of the main ruler 4 and the rotating rod 7 includes 0.5 meters to 2 meters, and the length range of the secondary ruler 5 includes 1 meter to 3 meters.
[0046] In some embodiments, the length of the first measuring claw 6 ranges from 100 mm to 500 mm.
[0047] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Those of ordinary skill in the art may understand and implement the present invention without creative effort.
[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A crane beam track deviation detection device based on a rotating rod, characterized in that: include: A main ruler and a secondary ruler, wherein the main ruler and the secondary ruler are separate structures; The main ruler has a scale for length measurement on its upper surface, a first measuring claw is fixedly mounted vertically downward at one end, and the other end is rotatably connected to the rotating rod through a rotating hinge and fixed in two mutually horizontal and vertical directions, and the inner surface of the first measuring claw is flush with the zero scale line of the scale; The secondary ruler has a second measuring claw fixedly mounted vertically downward at one end, and an auxiliary positioning plate fixedly mounted vertically upward at the same end. The outer surface of the second measuring claw is flush with the outer surface of the auxiliary positioning plate, and both are perpendicular to the secondary ruler body.
2. The crane beam track deviation detection device based on a rotating rod according to claim 1 is characterized in that: The other end of the main scale is provided with a positioning groove connected to the rotating rod, and the positioning groove is provided with a clamping groove in the horizontal direction and the vertical direction of the main scale; The rotating hinge is provided at one end of the rotating rod, and a positioning pin is provided on the rotating hinge. When the rotating rod and the main scale are rotated to be parallel and perpendicular to each other, the positioning pin is fixed to the slot through a spring, thereby fixing the rotating rod and the main scale in the parallel and perpendicular directions respectively.
3. The crane beam track deviation detection device based on a rotating rod according to claim 1, characterized in that: One end of the rotating rod is provided with a positioning groove connected to the main ruler, and the positioning groove is provided with a clamping groove in the horizontal direction and the vertical direction of the rotating rod; The other end of the main scale is provided with the rotating hinge, and the rotating hinge is provided with a positioning pin. When the rotating rod and the main scale are rotated to be parallel and perpendicular to each other, the positioning pin is fixed to the slot through a spring, thereby fixing the rotating rod and the main scale in the parallel and perpendicular directions respectively.
4. The crane beam track deviation detection device according to claim 1, characterized in that: The length of the first measuring jaw is greater than the length of the second measuring jaw.
5. The crane beam track deviation detection device according to claim 1, characterized in that: The main body of the main ruler and the auxiliary ruler are both square rods. The main body of the main ruler and the first measuring claw form an L-shaped structure, and the auxiliary ruler main body and the second measuring claw form an L-shaped structure.
6. The crane beam track deviation detection device according to claim 5, characterized in that: The first measuring jaw is a square rod with the same width as the main ruler, and the second measuring jaw is a square rod with the same width as the secondary ruler.
7. The crane beam track deviation detection device according to claim 1, characterized in that: A level is installed on the upper surface of the main ruler and / or the auxiliary ruler.
8. The crane beam track deviation detection device according to claim 1, characterized in that: The main material of the main ruler and the auxiliary ruler includes aluminum alloy or stainless steel.
9. The crane beam track deviation detection device according to claim 1, characterized in that: The outer surface of the other end of the rotating rod is covered with a hand-held insulating rubber sleeve.
10. The crane beam track deviation detection device according to claim 1, characterized in that: The length range of the main ruler and the rotating rod includes 0.5 meters to 2 meters, the length range of the secondary ruler includes 1 meter to 3 meters, and the length range of the first measuring claw includes 100 millimeters to 500 millimeters.