Upright jack welding detection tool

Abstract

The invention belongs to the technical field of jack detection, and relates to a stand column jack welding detection gauge which comprises a measuring tool body, one end of the measuring tool body is of a fixing structure, the other end of the measuring tool body is of a measuring structure, and the fixing structure comprises two positioning screws which can be erected on the cambered surface of a jack cylinder opening. The measuring structure comprises a guide rail fixedly connected with the measuring tool body, the guide rail is provided with scale marks, the guide rail is further sleeved with a slidable reading plate, the reading plate is provided with a guide rail hole matched with the guide rail, the bottom of the guide rail is further provided with a telescopic rod hole a synchronously extending with the guide rail, and the telescopic rod hole a is connected with the scale marks. And a telescopic rod which can be limited to stretch out and draw back is arranged in the telescopic rod hole a. The detection tool has the advantages of being convenient to adjust, accurate in measurement and capable of saving a large amount of detection time. The detection tool can be used for detecting all stand columns and jacks, and the universality of the detection tool is achieved. When a larger cylinder body is detected, one person can simply and conveniently operate, and the labor cost is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of jack detection, and in particular relates to a welding detection fixture for a column jack. Background Art

[0002] In the hydraulic system, column jacks are important supporting and transmission components and are widely used in mining machinery, construction machinery, lifting and transportation equipment and other fields. In the manufacturing process of column jacks, in order to ensure its reliable performance, the requirements for the quality of joint welding are very high. After the traditional column jack joints are welded, in order to confirm whether the joint welding distance and the straightness of the pipe seat, control valve seat, joint, and lifting ring meet the requirements, a tape measure and a straight ruler are usually used for inspection. However, the existing technology has the following defects:

[0003] Errors caused by manual operation: When using a straight ruler to measure distance, you need to stabilize it on the cylinder mouth of the jack by hand and then measure with a tape measure. During this process, since the straight ruler needs to be manually supported, the instability of the hand will cause deviations in the measurement results. In addition, when measuring the position of joints at a long distance, due to the lack of accurate reference points, the measurement value can only be estimated, which reduces the measurement accuracy.

[0004] Straightness detection is difficult: For various accessories welded on the cylinder body, such as pipe seats, control valve seats, joints, lifting rings, etc., their verticality with the cylinder bottom directly affects the normal use of the equipment. However, without special detection tools, the straightness detection of these parts becomes very complicated and difficult to complete accurately.

[0005] The operation is cumbersome and prone to errors: The existing detection methods are not only cumbersome, but also prone to detection errors due to human factors. Especially when facing a large cylinder, the inspector needs to operate with both hands in different positions or work together. Long-term work can easily make people feel tired, which in turn affects the detection efficiency. Moreover, when multiple people collaborate, it also increases quality risks.

[0006] Size issue: With the development of mechanical equipment, the size of modern column jack cylinders is getting larger and larger, which brings greater challenges to traditional manual inspection. Larger cylinders not only mean longer measurement distances, but also require higher accuracy in joint positions. Traditional measuring tools are unable to meet the high-precision measurement requirements in this case.

[0007] At present, the market is in urgent need of a new type of detection tool to overcome the above shortcomings, so as to quickly and accurately complete the detection of the welding distance of the column jack joint and the straightness of the seat, control valve seat, joint, lifting ring and other related parts. Summary of the invention

[0008] In view of the deficiencies in the prior art, the present invention provides a column jack welding detection fixture to solve the problems existing in the prior art.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a column jack welding inspection gauge, comprising a gauge body, one end of the gauge body is a fixed structure, and the other end is a measuring structure, the fixed structure comprises two positioning screws that can be erected on the arc surface of the jack cylinder port, the two positioning screws are respectively located on the left and right sides of the gauge body, the two positioning screws are connected to the gauge body for limited linear sliding through a limited sliding structure, and the two positioning screws slide synchronously relative to the gauge body, the measuring structure comprises a guide rail fixedly connected to the gauge body, the guide rail is provided with scale lines, the guide rail is also sleeved with a slidable reading plate, the reading plate is provided with a guide rail hole matching the guide rail, the bottom of the guide rail is also provided with a telescopic rod hole a extending synchronously with the guide rail, and the telescopic rod hole a is provided inside with a telescopic rod that can be limited and telescopic.

[0010] Furthermore, the limited sliding structure includes two rack blocks, the bottom of one end of the rack block is provided with teeth, and the other end of the rack block is provided with a positioning screw mounting threaded hole, and a positioning screw perpendicular to the plane of the rack block is installed in the positioning screw mounting threaded hole. The two rack blocks are respectively installed on the left and right sides of the measuring tool body through a fixed block, and a rotatable gear is installed in the fixed block at the position corresponding to the installation of the rack block. The toothed sides of the two rack blocks are arranged opposite to each other, and the gear is located in the middle of the two rack blocks, and the gear is meshed with the upper and lower rack blocks.

[0011] Furthermore, a gear mounting hole is provided on the fixing block at a position corresponding to the gear mounting position, a fixing screw a passes through the gear mounting hole and the shaft hole of the gear and is fixed to the inner wall of the measuring tool body, and a tightening screw mounting hole is provided on the fixing block near the gear mounting hole, and a tightening screw is installed in the tightening screw mounting hole.

[0012] Furthermore, a groove for installing a fixing block is provided at the lower part of the measuring tool body, and the fixing block includes a protruding block at the upper part. A bayonet adapted to the protruding block is provided in the groove of the measuring tool body, and the protruding block can be inserted into the bayonet.

[0013] Furthermore, a slider of matching shape is fixedly connected to the upper portion of the rear end of the reading plate, a slider mounting hole is provided on the upper portion of the reading plate, a reading plate mounting hole is provided on the slider corresponding to the slider mounting hole, and the reading plate and the slider are connected to the matching slider mounting hole and reading plate mounting hole by bolts b.

[0014] Furthermore, a limit block is provided on the upper part of the inner end of the telescopic rod, a limit groove is provided in the telescopic rod hole a corresponding to the limit block, a stop block is provided at the position where the telescopic rod extends out of the telescopic rod hole a, a telescopic rod hole b matching the telescopic rod is provided on the stop block, the telescopic rod hole b is penetrated on the telescopic rod, and the stop block is fixed to the end of the telescopic rod hole a.

[0015] Furthermore, fixing holes are provided at both ends of the stopper, and the stopper and the telescopic rod hole a are positioned at the end of the telescopic rod hole a by bolts a passing through the fixing holes.

[0016] Furthermore, the top surface of the guide rail is a horizontal flat surface, and scale lines are provided on the two side surfaces in the middle. The two side surfaces on the guide rail corresponding to the scale lines are vertical flat surfaces, and the top of the guide rail is wider than the scale area in the middle. The two side surfaces on the upper part of the guide rail are arc surfaces that transition from the wide top surface to the narrow scale area, and the shape of the guide rail hole of the reading plate matches the outer contour of the guide rail.

[0017] Furthermore, the telescopic rod hole a at the lower end of the guide rail and the radial cross-section of the telescopic rod are in a triangular shape, with one corner of the triangle vertically located downward, forming a fixed-point vertical state at the lower part of the guide rail.

[0018] Furthermore, the radial cross-section of the limit block on the telescopic rod is triangular and smaller than the radial cross-section of the telescopic rod, and the limit block is shorter than the telescopic rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Easy adjustment: The positioning screw and the measuring tool body are connected by a limited linear sliding structure. The meshing action of the rack block and the gear realizes the synchronous sliding of the positioning screw. The distance between the positioning screws can be changed by adjusting the rack block to adapt to different sizes of columns and jack cylinders. The synchronous sliding design ensures that the measuring tool body is always in the center position, which is convenient for quick alignment of the workpiece without multiple adjustments.

[0021] 2. Accurate measurement: Through the precise meshing of the gear and the rack block, the positioning screw can slide synchronously, ensuring the parallelism of the measuring tool body. The use of the scale lines on the guide rail and the reading plate makes the reading more accurate and reduces human errors. The matching design of the number of teeth and the pitch can accurately control the moving distance of the positioning screw, further improving the measurement accuracy.

[0022] 3. Save inspection time: Users can complete the adjustment of the positioning screw in a short time, reducing preparation time. The synchronous sliding structure makes the measurement process faster and reduces the time for repeated measurements. The clear scale lines make the readings fast and accurate, without repeated calibration, saving inspection time.

[0023] 4. Strong versatility: The positioning screw can be quickly adjusted according to the different sizes of columns and jack cylinder ports, and is suitable for workpieces of various sizes. The design of the telescopic rod allows the measurement range to be extended when measuring the straightness of a larger cylinder, increasing the scope of application of the tool. The design of the tool takes into account the difference in curvature of different types of jacks, making the tool have good versatility.

[0024] 5. Easy operation: The positioning screw adjustment and reading plate movement can be completed by one person, reducing the need for multiple people to collaborate. The operation steps are simplified, and the user only needs to adjust the position of the positioning screw and read the value on the reading plate to complete the measurement. The synchronous sliding structure ensures that the measuring tool body is always in the center position, which is convenient for single-person operation.

[0025] 6. Save labor costs: When inspecting larger cylinders, one person can complete all operations, reducing the need for additional labor. No need for multiple people to collaborate, reducing labor costs, especially in large-scale production environments.

[0026] 7. Good stability: The precise fit between the inner diameter of the stopper and the outer diameter of the telescopic rod ensures that the telescopic rod will not shake when extended. The design of the stopper limits the range of movement of the telescopic rod and enhances the stability of the measuring tool. Precise processing ensures smooth sliding of the telescopic rod and prevents it from shaking during use.

[0027] 8. Extended measuring distance: When you need to measure the straightness of a larger cylinder, you can pull out the telescopic rod to extend the measuring range. The design of the telescopic rod hole a ensures that the telescopic rod can move smoothly while maintaining measurement accuracy. The limit design prevents the telescopic rod from completely leaving the guide rail, ensuring the reliability of the measurement.

[0028] 9. Improve measurement accuracy: The shape of the guide rail hole on the reading board matches the outer contour of the guide rail, ensuring that the reading board can move accurately along the guide rail without any offset or jamming due to sliding. Such a design not only ensures the smoothness of the reading board when sliding, but also facilitates users to read the measurement data. The reading board is connected to the guide rail through a slider. The design of the slider allows the reading board to slide freely on the guide rail. At the same time, it is fixed by bolt b to ensure that the reading board will not slide accidentally during the measurement process. The top surface of the guide rail is a horizontal flat surface, and scale lines are provided on the two side surfaces of the middle. Such a design ensures the smoothness of the reading board when sliding, and facilitates users to read the measurement data. The two side surfaces of the upper part of the guide rail are arc surfaces that transition from the wide top surface to the narrow scale area. Such a design is not only beautiful, but also practical, ensuring that the reading board does not deviate when sliding. The column jack welding inspection fixture of the present invention not only ensures that the reading board is both stable and shake-free when sliding along the guide rail, but also improves the measurement accuracy and the user's operating experience. At the same time, through precision processing technology and reasonable gap configuration, the matching degree between the reading plate and the guide rail is ensured, achieving the best sliding effect, thereby further improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 This is a front view of the column jack welding inspection fixture of the present invention;

[0031] Figure 2 The present invention Figure 1 A partial enlarged schematic diagram of

[0032] Figure 3 It is a right side view of the column jack welding inspection fixture of the present invention;

[0033] Figure 4 It is a left view of the column jack welding inspection fixture of the present invention;

[0034] Figure 5 It is a front view of the measuring tool body of the column jack welding detection inspection tool of the present invention;

[0035] Figure 6 It is a right view of the measuring tool body of the column jack welding detection inspection tool of the present invention;

[0036] Figure 7 It is a left view of the measuring tool body of the column jack welding detection inspection tool of the present invention;

[0037] Figure 8 It is a front view of the telescopic rod of the column jack welding inspection fixture of the present invention;

[0038] Fig. 9 It is a side view of the telescopic rod of the column jack welding detection fixture of the present invention;

[0039] Fig.10 It is a structural schematic diagram of a slider of a column jack welding inspection fixture of the present invention;

[0040] Fig.11 It is a structural schematic diagram of a reading plate of a column jack welding inspection fixture of the present invention;

[0041] Fig.12 It is a structural schematic diagram of the stopper of the column jack welding detection fixture of the present invention;

[0042] Fig.13 It is a front view of the fixing block of the column jack welding inspection fixture of the present invention;

[0043] Fig.14 It is a left view of the fixing block of the column jack welding inspection fixture of the present invention;

[0044] Fig.15 It is a front view of the rack block of the column jack welding inspection fixture of the present invention;

[0045] Fig.16 It is a left view of a rack block of a column jack welding detection fixture of the present invention.

[0046] In the figure:

[0047] 1. Measuring tool body, 1-1. Telescopic rod hole a, 1-2. Scale line, 1-3. Limiting groove, 1-4. Fixed block mounting threaded hole, 1-5. Stopper mounting hole, 1-6. Guide rail; 2. Fixed block, 2-1. Gear mounting hole, 2-2. Tightening screw mounting hole, 2-3. Raised block; 3. Fixing screw a; 4. Gear; 5. Positioning screw; 6. Block with rack, 6-1. Tooth, 6-2. Positioning screw mounting threaded hole; 7. Reading board, 7-1. Guide rail hole, 7-2. Slider mounting hole; 8. Telescopic rod, 8-1. Limiting block; 9. Slider, 9-1. Reading board mounting hole; 10. Stopper, 10-1. Telescopic rod hole b, 10-2. Fixed hole; 11. Bolt a; 12. Bolt b; 13. Tightening screw. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The present invention provides a column jack welding inspection tool, which is suitable for the inspection of columns and jacks produced in batches. Figure 1-Figure 16 As shown, it includes a measuring tool body 1, one end of the measuring tool body 1 is a fixed structure, and the other end is a measuring structure, the fixed structure includes two positioning screws 5 that can be mounted on the arc surface of the jack cylinder port, the two positioning screws 5 are kept flush, the two positioning screws 5 are respectively located on the left and right sides of the measuring tool body 1, the two positioning screws 5 are connected to the measuring tool body 1 by a limited linear sliding structure, and the two positioning screws 5 slide synchronously relative to the measuring tool body 1, the measuring structure includes a guide rail 1-6 fixedly connected to the measuring tool body 1, the guide rail 1-6 is provided with a scale line 1-2, the guide rail 1-6 is also sleeved with a slidable reading plate 7, the reading plate 7 is provided with a guide rail hole 7-1 matching the guide rail 1-6, the bottom of the guide rail 1-6 is also provided with a telescopic rod hole a1-1 extending synchronously with the guide rail 1-6, and the inside of the telescopic rod hole a1-1 is provided with a telescopic rod 8 that can be limited and telescopic.

[0050] The design of the measuring tool body and its structure of the present invention is the basis of the entire detection tool, which is divided into two parts: a fixed structure and a measuring structure. The fixed structure includes a positioning screw 5, which is used to be firmly placed on the arc surface of the jack cylinder mouth to ensure that the detection tool is correctly aligned with the workpiece. The measuring structure includes guide rails 1-6 and a reading plate 7, which are used to accurately locate and read the position data of joints and other components. The design of the telescopic rod 8 allows the tool to extend the measuring distance as needed.

[0051] The diameters of the columns of the jacks vary. For columns of different sizes, the curvature of the arc surface is inconsistent. By adjusting the distance between the two positioning screws 5, it is possible to adapt to different arc surfaces. When measurement is required, the column jack is turned upside down, the arc surface with the joint is facing upward, the two positioning screws 5 are separated by a certain distance, and then the positioning screws 5 are erected on the arc surface of the cylinder mouth of the column jack, so that the inner side of the measuring tool body 1 fits the cylinder mouth. By adjusting the distance between the two positioning screws 5, the height of the measuring tool body 1 relative to the column jack can be adjusted. It can also be adjusted by The parallelism of the positions of the two positioning screws 5 on the arc surface of the cylinder mouth can be adjusted to be parallel to the interface of the measuring tool body 1 and the column jack, and then the welding distance of the joint can be measured by moving the reading plate 7 to the joint position. The radial cross-section shape of the telescopic rod hole a1-1 and the telescopic rod 8 is a triangle. When measuring the straightness, since the bottom of the guide rail 1-6 is designed as a triangle, the straightness of the pipe seat, control valve seat, joint and lifting ring can be tested. If a larger cylinder body is encountered and the distance is not enough, the telescopic rod 8 can be pulled out to extend the distance for detection.

[0052] In a preferred embodiment, reference Figure 1-Figure 5 , Figure 15-16The limited sliding structure includes two rack blocks 6, one end of the rack block 6 is provided with a tooth 6-1 at the bottom, and the other end of the rack block 6 is provided with a positioning screw mounting threaded hole 6-2, and a positioning screw 5 perpendicular to the plane of the rack block 6 is correspondingly installed in the positioning screw mounting threaded hole 6-2. The installation must ensure that the two positioning screws 5 remain flush, that is, it must ensure that the two positioning screw mounting threaded holes 6-2 after installation are at the same height. Therefore, when opening the positioning screw mounting threaded holes 6-2 in the two rack blocks 6, it is necessary to pay attention to the height difference between the two holes. The two rack blocks 6 are respectively installed on the left and right sides of the measuring tool body 1 through a fixed block 2.

[0053] In the above embodiment, the limited sliding structure is composed of a rack block 6 and a gear 4. Through the meshing action of the gear and the rack, the synchronous sliding of the positioning screw 5 is achieved, thereby allowing the user to adjust the distance between the positioning screws 5 to adapt to columns of different sizes. This design simplifies the adjustment process, ensures that the center position of the detection tool is always maintained in the center of the measuring tool body 1, and helps to improve the accuracy of the measurement.

[0054] In a further preferred embodiment, reference Figure 1-Figure 5 , Figure 13-14 The lower part of the measuring tool body 1 is provided with a groove for installing a fixing block 2, and the fixing block 2 includes a protruding block 2-3 on the upper part. The groove of the measuring tool body 1 is provided with a bayonet adapted to the protruding block 2-3, and the protruding block 2-3 can be snapped into the bayonet.

[0055] In the above embodiment, the assembly of the measuring tool body and the fixed block is involved, and the bayonet design between the groove of the measuring tool body 1 and the protrusion block 2-3 of the fixed block 2 enables the fixed block 2 to be firmly mounted on the measuring tool body 1. This assembly method simplifies the assembly process and ensures the connection strength between the fixed block 2 and the measuring tool body 1.

[0056] In a further preferred embodiment, reference Figure 1-Figure 7 , Figure 13-14 A rotatable gear 4 is installed at the position corresponding to the installation position of the rack block 6 in the fixed block 2, and the two rack blocks 6 are arranged opposite to each other with the sides having the teeth 6-1. The gear 4 is located in the middle of the two rack blocks 6, and the gear 4 is meshed with the upper and lower rack blocks 6.

[0057] In a further preferred embodiment, reference Figure 1-Figure 7 , Figure 13-14A gear mounting hole 2-1 is provided on the fixing block 2 at a position corresponding to the mounting position of the gear 4, a fixing screw a3 passes through the gear mounting hole 2-1 and the axial hole of the gear 4 and is fixed to the inner wall of the measuring tool body 1, and a tightening screw mounting hole 2-2 is provided on the fixing block 2 near the gear mounting hole 2-1, and a tightening screw 13 is installed in the tightening screw mounting hole 2-2.

[0058] In the above embodiment, the gear 4 and the tightening screw 13 installed inside the fixing block 2 allow the user to lock the position of the positioning screw 5 while adjusting it, thereby preventing it from moving during the measurement process. This design ensures the position stability of the positioning screw 5 and further improves the measurement accuracy.

[0059] In the fixing structure of the present invention, by pulling any one of the rack blocks 6, the rack blocks 6 on both sides are displaced synchronously, and the measuring tool body 1 is always kept at the center position of the two rack blocks 6, that is, the measuring tool body 1 is always kept at the center position of the two positioning screws 5, which is convenient for maintaining balance during measurement and for adjusting the height and balance of the measuring tool body 1. The column diameters of the jacks are different. For columns of different sizes, the curvature of the arc surface is inconsistent. By adjusting the distance between the two positioning screws 5, different arc surfaces can be adapted. When measurement is required, the column jack is turned upside down and the arc surface with a joint is turned upside down. Pull the two rack blocks 6 upward, and the rack blocks 6 on both sides are displaced synchronously under the action of the gear 4, so that the positioning screws 5 on both sides are displaced synchronously, and the positioning screws 5 on both sides are separated by a certain distance, and then the positioning screws 5 are erected on the arc surface of the cylinder mouth of the column jack, so that the inner side of the measuring tool body 1 fits the cylinder mouth, and the height of the measuring tool body 1 relative to the column jack can be adjusted by adjusting the distance between the two positioning screws 5, and the parallelism can also be adjusted by adjusting the position of the two positioning screws 5 on the arc surface of the cylinder mouth, that is, it can be adjusted to be parallel to the interface of the measuring tool body 1 and the column jack.

[0060] In a preferred embodiment, reference Figure 1-Figure 6 , Figure 10-11 The measuring structure includes a guide rail 1-6 fixedly connected to the measuring tool body 1, and a scale line 1-2 is provided on the guide rail 1-6. A slidable reading plate 7 is also sleeved on the guide rail 1-6. A slider 9 of matching shape is fixedly connected to the upper part of the rear end of the reading plate 7. The reading plate 7 is convenient for sliding on the guide rail 1-6 through the slider 9. A slider mounting hole 7-2 is provided on the upper part of the reading plate 7. A reading plate mounting hole 9-1 is provided on the slider 9 corresponding to the slider mounting hole 7-2. The reading plate 7 and the slider 9 are connected to the matching slider mounting hole 7-2 and the reading plate mounting hole 9-1 by bolts b12.

[0061] In the above embodiment, the reading board 7 is connected to the guide rail 1-6 through the slider 9, so that the reading board 7 can slide freely on the guide rail 1-6. This design makes it easy for the user to move the reading board 7 to a specified position for reading, and at the same time, the fixing of the bolt b12 ensures that the reading board 7 will not slide accidentally during the measurement process.

[0062] In a preferred embodiment, reference Figure 1-Figure 6 , Figure 10-11 The reading plate 7 is provided with a guide rail hole 7-1 matching the guide rail 1-6, and the bottom of the guide rail 1-6 is also provided with a telescopic rod hole a1-1 extending synchronously with the guide rail 1-6, and the interior of the telescopic rod hole a1-1 is provided with a telescopic rod 8 that can be limited and telescopic.

[0063] In a preferred embodiment, reference Figure 1-Figure 6 , Figure 8-Figure 9 The upper inner end of the telescopic rod 8 is provided with a stopper 8-1, and a stopper slot 1-3 is provided in the telescopic rod hole a1-1 corresponding to the stopper 8-1. A stopper 10 is provided at the position where the telescopic rod 8 extends out of the telescopic rod hole a1-1. The stopper 10 is provided with a telescopic rod hole b10-1 matching the telescopic rod 8. The telescopic rod hole b10-1 is penetrated on the telescopic rod 8, and the stopper 10 is fixed to the end of the telescopic rod hole a1-1. The two ends of the stopper 10 are provided with fixing holes 10-2, and the stopper 10 and the telescopic rod hole a1-1 are positioned at the end of the telescopic rod hole a1-1 through bolts a11 passing through the fixing holes 10-2.

[0064] In the above embodiment, the stopper 8-1 on the telescopic rod 8 cooperates with the stopper groove 1-3 in the telescopic rod hole a1-1 to prevent the telescopic rod 8 from rotating or over-extending during use. The combination of the stopper 10 and the bolt a11 ensures the stability of the telescopic rod 8 in the extended state, so that the measuring distance can be extended as needed without affecting the measuring accuracy.

[0065] In a preferred embodiment, reference Figure 1-Figure 3 , Figure 5-Figure 6 , Figure 10-11 The top surface of the guide rail 1-6 is a horizontal flat surface, and scale lines 1-2 are provided on the two side surfaces in the middle. The two side surfaces of the guide rail 1-6 corresponding to the scale lines 1-2 are vertical flat surfaces, and the top of the guide rail 1-6 is wider than the scale area in the middle. The two side surfaces of the upper part of the guide rail 1-6 are arc surfaces that transition from the wide top surface to the narrow scale area. The shape of the guide rail hole 7-1 of the reading plate 7 matches the outer contour of the guide rail 1-6.

[0066] The special design of the guide rail 1-6 includes the flat surface at the top, the scale line 1-2 in the middle, and the curved transition on the side, which ensures the smoothness of the reading board 7 when sliding, and also facilitates the user to read the measurement data. The guide rail hole 7-1 on the reading board 7 matches the shape of the guide rail 1-6, so that the reading board 7 can move accurately along the guide rail 1-6.

[0067] In a preferred embodiment, reference Figure 3 , Figure 8-Figure 9 The radial cross-section shape of the telescopic rod hole a1-1 at the lower end of the guide rail 1-6 and the telescopic rod 8 is a triangle, one corner of the triangle is vertically located below, and a fixed-point vertical state is formed below the guide rail 1-6.

[0068] In the above embodiment, the telescopic rod hole a1-1 at the lower end of the guide rail 1-6 and the triangular cross-section design of the telescopic rod 8 enable the tool to provide a stable reference point when measuring straightness. This design helps to ensure that the tool can be placed vertically during straightness testing, thereby improving the reliability of the measurement results.

[0069] In a preferred embodiment, reference Figure 8-Figure 9 The radial cross section of the limit block 8 - 1 on the telescopic rod 8 is triangular and smaller than the radial cross section of the telescopic rod 8 , and the limit block 8 - 1 is shorter than the telescopic rod 8 .

[0070] In the above embodiment, the triangular cross-section design of the stopper 8-1 on the telescopic rod 8 is not only smaller than the cross-section of the telescopic rod 8, but also shorter than the telescopic rod 8. Such a design allows the stopper 8-1 to be restricted when moving in the telescopic rod hole a1-1, preventing the telescopic rod 8 from completely escaping from the guide rail 1-6, and also facilitates the user to adjust the extension length of the telescopic rod 8.

[0071] In order to further optimize the synchronous sliding function of the positioning screw 5 and the rack block 6 and enhance its practicality and accuracy, a scale is added to the rack of the rack block 6. This allows the user to more intuitively understand the current position of the positioning screw 5, thereby improving the accuracy during the adjustment process. In a specific implementation, a clearly visible scale line is added to the non-engaging side of the rack of the rack block 6, and the scale line is marked every millimeter or every half millimeter to facilitate fine-tuning.

[0072] In a further preferred embodiment, in order to ensure synchronous sliding of the positioning screw 5 and keep the measuring tool body 1 in the center position, it is necessary to configure the ratio of the number of teeth 6-1 on the rack block 6 and the number of teeth on the gear 4 to ensure that the displacement of the rack block 6 is equal. If the gear 4 rotates one circle, the rack block 6 should move the same distance synchronously. In practice, by ensuring that the number of teeth on the gear 4 matches the pitch of the rack block 6, the moving distance of the positioning screw 5 can be accurately controlled to ensure the parallelism of the measuring tool body 1. The specific implementation is as follows:

[0073] Number of teeth and pitch matching:

[0074] The number of teeth of the gear 4 is designed to be Z, and the pitch of the rack block 6 is P. For each rotation of the gear 4, the distance d moved by the rack block 6 should be Z × P. Therefore, by selecting appropriate Z and P, the moving distance of the positioning screw 5 can be accurately controlled.

[0075] Synchronous motion of gear 4 and rack block 6:

[0076] If the tooth pitch P of the rack block 6 is fixed, then the number of teeth Z of the gear 4 determines the displacement of the rack block 6 each time it rotates. For example, if the tooth pitch P is 1 mm and the number of teeth Z of the gear 4 is 20, the rack block 6 will move 20 mm each time the gear 4 rotates one circle. For more precise adjustment, a higher number of teeth Z can be selected, such as 100, so that the rack block 6 only moves 100 mm / 100 = 1 mm each time it rotates one circle.

[0077] Synchronous movement of positioning screw 5:

[0078] In order to ensure that the two positioning screws 5 move synchronously, the two rack blocks 6 must be driven by the same gear 4. The center of the gear 4 must be located on the center line of the gauge body 1 to ensure that the two positioning screws 5 move synchronously, so that the gauge body 1 remains in the center position.

[0079] Installation accuracy of gear 4:

[0080] It is necessary to ensure that the gear 4 is installed in the gear installation hole 2-1 on the fixed block 2, and the axis of the gear 4 must coincide with the center line of the measuring tool body 1. In practice, this is achieved by accurately machining the relevant holes on the fixed block 2 and the measuring tool body 1 to ensure that the gear 4 is not skewed after installation.

[0081] Manufacturing accuracy of rack block 6:

[0082] The manufacturing of the rack block 6 must ensure uniform distribution of the teeth 6-1 and a consistent pitch P, so as to ensure the meshing accuracy between the gear 4 and the rack block 6. The rack block 6 can be produced by precision machining techniques such as wire cutting or gear hobbing.

[0083] Regulation mechanism:

[0084] By adding scale lines on the rack block 6, the user can be more intuitively informed of the current position of the positioning screw 5, thereby improving the accuracy of the adjustment process. The scale lines can be marked per millimeter or per half millimeter to facilitate fine-tuning.

[0085] Through the above implementation, it is possible to ensure that the positioning screw 5 slides synchronously and keep the measuring tool body 1 at the center position, thereby improving the measurement accuracy and ensuring the parallelism of the measuring tool body 1.

[0086] In a further preferred embodiment, for columns of different sizes, the curvature of the curved surface is inconsistent. In order to adapt to different curved surfaces, it is necessary to calculate the maximum adjustable spacing of the positioning screw 5. In practice, by measuring the maximum and minimum curvatures of the cylinder ports of different types of jacks, the maximum and minimum spacings of the positioning screw 5 are obtained. By adjusting the length of the rack block 6, it can be ensured that the positioning screw 5 can cover the required range.

[0087] In a further preferred embodiment, in order to ensure that the reading board 7 slides smoothly and without shaking along the guide rail 1-6, a gap is configured between the width of the guide rail 1-6 and the width of the guide rail hole 7-1 of the reading board 7 to reduce friction while ensuring that the reading board 7 does not deviate. In implementation, precision machining is used to ensure that the tolerances of the guide rail 1-6 and the guide rail hole 7-1 are within a reasonable range to achieve the best sliding effect. The specific implementation is as follows:

[0088] Gap configuration between guide rails 1-6 and reading plate 7:

[0089] The gap (G) between the width (W_g) of the guide rail 1-6 and the width (W_h) of the guide rail hole 7-1 of the reading board 7 should be set within a reasonable range. Generally speaking, the gap (G) should be between 0.05mm and 0.15mm, which can ensure that the reading board 7 slides smoothly on the guide rail 1-6 and effectively prevent it from shaking or deviating from the track during the sliding process.

[0090] Precision Machining:

[0091] In order to ensure that the tolerances of the guide rails 1-6 and the guide rail holes 7-1 on the reading plate 7 are within a reasonable range, these components can be manufactured by CNC machining of a numerical control machine tool. Ensure that the machining accuracy reaches ±0.02mm or higher to achieve the best sliding effect.

[0092] Special design of rails 1-6:

[0093] The top surface of the guide rail 1-6 is a horizontal flat surface, and the two side surfaces in the middle are provided with scale lines 1-2, and the top of the guide rail 1-6 is wider than the scale area in the middle. The two side surfaces of the upper part of the guide rail 1-6 are arc surfaces that transition from the wide top surface to the narrow scale area. Such a design not only ensures the smoothness of the reading board 7 when sliding, but also facilitates the user to read the measurement data.

[0094] Matching of reading board 7 and guide rails 1-6:

[0095] The shape of the guide rail hole 7-1 on the reading board 7 matches the outer contour of the guide rail 1-6. This means that the guide rail hole 7-1 of the reading board 7 must be completely consistent with the guide rail 1-6 in terms of width, height and arc transition, so as to ensure that the reading board 7 can move accurately along the guide rail 1-6 without any offset or jamming due to sliding.

[0096] Through the above measures, it can be ensured that the reading board 7 slides along the guide rails 1-6 smoothly and without shaking, thereby improving the measurement accuracy and the user's operating experience. At the same time, through precision processing technology and reasonable gap configuration, the matching degree between the reading board 7 and the guide rails 1-6 can be ensured to achieve the best sliding effect.

[0097] In a further preferred embodiment, in order to ensure that the telescopic action of the telescopic rod 8 is smooth and accurately positioned, it is necessary to configure the friction coefficient between the telescopic rod 8 and the guide rail 1-6. The stop block 8-1 on the telescopic rod 8 should be designed to be of appropriate size so that it can move smoothly in the telescopic rod hole a1-1 without loosening. This involves the tolerance design between the stop block 8-1 and the telescopic rod hole a1-1. The specific implementation details are as follows:

[0098] Friction coefficient configuration:

[0099] The friction coefficient between the telescopic rod 8 and the guide rail 16 needs to be moderate, neither too large to cause difficulty in telescoping, nor too small to cause the telescopic rod 8 to slide easily during use. Generally, the friction coefficient should be between 0.1 and 0.3 to ensure that the telescopic rod 8 can slide smoothly and remain stable in the desired position.

[0100] Design of the limit block 81:

[0101] The size design of the stopper 81 on the telescopic rod 8 is very important. The radial cross section of the stopper 81 is triangular and smaller than the radial cross section of the telescopic rod 8, and the stopper 81 is shorter than the telescopic rod 8. Such a design can ensure that the stopper 81 is restricted when moving in the telescopic rod hole a11, preventing the telescopic rod 8 from completely leaving the guide rail 16, and also facilitates the user to adjust the extension length of the telescopic rod 8.

[0102] Tolerance design:

[0103] The tolerance design between the telescopic rod 8 and the telescopic rod hole a11 is very critical. In order to ensure that the telescopic rod 8 is smooth and does not loosen during the telescopic process, the tolerance between the outer diameter of the telescopic rod 8 and the inner diameter of the telescopic rod hole a11 should be within a reasonable range. The tolerance range is H7 / g6, which means that the outer diameter of the telescopic rod 8 adopts the g6 tolerance grade, and the inner diameter of the telescopic rod hole a11 adopts the H7 tolerance grade. Such a tolerance grade can ensure the smooth sliding of the telescopic rod 8 and ensure its stability during use.

[0104] Surface treatment:

[0105] The surface treatment of the telescopic rod 8 may be chrome plating, oxidation or other surface hardening treatment techniques to improve wear resistance and reduce friction, which not only prolongs the service life of the telescopic rod 8 but also ensures that the telescopic rod 8 maintains smooth telescopic performance for a long time.

[0106] Material selection:

[0107] Selecting the right material is also an important factor to ensure smooth sliding of the telescopic rod 8. Usually, a material with high hardness and good wear resistance can be selected, such as stainless steel or heat-treated alloy steel. In addition, for the stop block 81, a material with slightly lower hardness can also be selected to facilitate its sliding in the telescopic rod hole a11.

[0108] Through the above measures, it can be ensured that the telescopic movement of the telescopic 8 is smooth and accurately positioned, thereby improving the overall performance and measurement accuracy of the detection tool. In addition, reasonable tolerance design and material selection can also extend the service life of the equipment and reduce maintenance costs.

[0109] In a further preferred embodiment, in order to ensure that the telescopic rod 8 does not shake when extended, the matching tolerance between the inner diameter of the stopper 10 and the outer diameter of the telescopic rod 8 is configured to ensure that the telescopic rod 8 can be stably extended. In implementation, appropriate inner diameter of the stopper 10 and outer diameter of the telescopic rod 8 are selected, and bolts a11 are used to tighten to prevent loosening.

[0110] In a further preferred embodiment, in order to improve the measurement accuracy, the spacing between the scale lines 1-2 should be uniform and meet the measurement accuracy requirements. For example, in the case of requiring high-precision measurement, the spacing between the scale lines 1-2 may need to be refined to 0.5 mm or even smaller. In implementation, a high-precision scale line 1-2 processing technology is used, and it is ensured that each scale is calibrated.

[0111] Assembly process:

[0112] Place the two rack blocks 6 opposite to each other, place the gear 4 between the two rack blocks 6, ensure that the teeth of the gear 4 are engaged with the teeth 6-1 of the rack block 6, insert the raised block 2-3 on the fixed block 2 into the groove of the measuring tool body 1, put the rack block 6 and the gear 4 into the groove of the measuring tool body 1, and pass the fixing screw a3 through the hole 2-1 on the fixed block 2 and the axial hole of the gear 4 in sequence to fasten them to the measuring tool body 1. At this time, fix the reading plate 7 to the reading plate mounting hole 9-1 on the slider 9 by the bolt b12, and ensure that the slider 9 can drive the reading plate 7 to slide freely on the guide rail 1-6.

[0113] Insert the telescopic rod 8 into the telescopic rod hole a1 - 1 , pass the bolt a11 through the fixing hole 10 - 2 of the stopper 10 and fix the stopper 10 on the guide rail 1 - 6 .

[0114] How to use:

[0115] Before measurement, place the positioning screw 5 on the arc surface of the jack cylinder mouth, adjust the rack block 6 to ensure that the measuring tool body 1 is parallel to the joint on the cylinder body, and the bottom surface of the measuring structure on the measuring tool body 1 fits with the arc surface of the cylinder body, then fit the inner side of the measuring tool body 1 with the cylinder mouth to ensure surface contact, move the slider 9 to make the reading plate 7 rest on the joint to be measured, read the scale value of the reading plate 7 on the guide rail 1-6 to measure the joint distance.

[0116] For straightness detection, the triangular cross-section design at the bottom of the guide rail 1-6 can be used to test the straightness of components such as pipe seats, control valve seats, joints and lifting rings. If the measuring distance needs to be extended, the telescopic rod 8 can be pulled out to an appropriate length.

[0117] Through the above technical solution, it can be seen that the beneficial effects of the present invention include:

[0118] 1. Easy adjustment: The positioning screw and the measuring tool body are connected by a limited linear sliding structure. The meshing action of the rack block and the gear realizes the synchronous sliding of the positioning screw. The distance between the positioning screws can be changed by adjusting the rack block to adapt to different sizes of columns and jack cylinders. The synchronous sliding design ensures that the measuring tool body is always in the center position, which is convenient for quick alignment of the workpiece without multiple adjustments.

[0119] 2. Accurate measurement: Through the precise meshing of the gear and the rack block, the positioning screw can slide synchronously, ensuring the parallelism of the measuring tool body. The use of the scale lines on the guide rail and the reading plate makes the reading more accurate and reduces human errors. The matching design of the number of teeth and the pitch can accurately control the moving distance of the positioning screw, further improving the measurement accuracy.

[0120] 3. Save inspection time: Users can complete the adjustment of the positioning screw in a short time, reducing preparation time. The synchronous sliding structure makes the measurement process faster and reduces the time for repeated measurements. The clear scale lines make the readings fast and accurate, without repeated calibration, saving inspection time.

[0121] 4. Strong versatility: The positioning screw can be quickly adjusted according to the different sizes of columns and jack cylinder ports, and is suitable for workpieces of various sizes. The design of the telescopic rod allows the measurement range to be extended when measuring the straightness of a larger cylinder, increasing the scope of application of the tool. The design of the tool takes into account the difference in curvature of different types of jacks, making the tool have good versatility.

[0122] 5. Easy operation: The positioning screw adjustment and reading plate movement can be completed by one person, reducing the need for multiple people to collaborate. The operation steps are simplified, and the user only needs to adjust the position of the positioning screw and read the value on the reading plate to complete the measurement. The synchronous sliding structure ensures that the measuring tool body is always in the center position, which is convenient for single-person operation.

[0123] 6. Save labor costs: When inspecting larger cylinders, one person can complete all operations, reducing the need for additional labor. No need for multiple people to collaborate, reducing labor costs, especially in large-scale production environments.

[0124] 7. Good stability: The precise fit between the inner diameter of the stopper and the outer diameter of the telescopic rod ensures that the telescopic rod will not shake when extended. The design of the stopper limits the range of movement of the telescopic rod and enhances the stability of the measuring tool. Precise processing ensures smooth sliding of the telescopic rod and prevents it from shaking during use.

[0125] 8. Extended measuring distance: When you need to measure the straightness of a larger cylinder, you can pull out the telescopic rod to extend the measuring range. The design of the telescopic rod hole a ensures that the telescopic rod can move smoothly while maintaining measurement accuracy. The limit design prevents the telescopic rod from completely leaving the guide rail, ensuring the reliability of the measurement.

[0126] 9. Improve measurement accuracy: The shape of the guide rail hole on the reading board matches the outer contour of the guide rail, ensuring that the reading board can move accurately along the guide rail without any offset or jamming due to sliding. Such a design not only ensures the smoothness of the reading board when sliding, but also facilitates users to read the measurement data. The reading board is connected to the guide rail through a slider. The design of the slider allows the reading board to slide freely on the guide rail. At the same time, it is fixed by bolt b to ensure that the reading board will not slide accidentally during the measurement process. The top surface of the guide rail is a horizontal flat surface, and scale lines are provided on the two side surfaces of the middle. Such a design ensures the smoothness of the reading board when sliding, and facilitates users to read the measurement data. The two side surfaces of the upper part of the guide rail are arc surfaces that transition from the wide top surface to the narrow scale area. Such a design is not only beautiful, but also practical, ensuring that the reading board does not deviate when sliding. The column jack welding inspection fixture of the present invention not only ensures that the reading board is both stable and shake-free when sliding along the guide rail, but also improves the measurement accuracy and the user's operating experience. At the same time, through precision processing technology and reasonable gap configuration, the matching degree between the reading plate and the guide rail is ensured, achieving the best sliding effect, thereby further improving the measurement accuracy.

[0127] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A column jack welding inspection fixture, characterized in that: The measuring tool comprises a measuring tool body (1), one end of the measuring tool body (1) is a fixed structure, and the other end is a measuring structure, the fixed structure comprises two positioning screws (5) which can be mounted on the arc surface of the jack cylinder port, the two positioning screws (5) are respectively located on the left and right sides of the measuring tool body (1), the two positioning screws (5) are connected to the measuring tool body (1) by a limited linear sliding structure, and the two positioning screws (5) slide synchronously relative to the measuring tool body (1), and the measuring structure comprises A guide rail (1-6) is fixedly connected to a measuring tool body (1), the guide rail (1-6) is provided with a scale mark (1-2), the guide rail (1-6) is also sleeved with a slidable reading plate (7), the reading plate (7) is provided with a guide rail hole (7-1) matching the guide rail (1-6), the bottom of the guide rail (1-6) is also provided with a telescopic rod hole a (1-1) extending synchronously with the guide rail (1-6), and the interior of the telescopic rod hole a (1-1) is provided with a telescopic rod (8) capable of limited telescopic extension.

2. A column jack welding inspection fixture according to claim 1, characterized in that: The limited sliding structure comprises two rack blocks (6), one end of the rack block (6) is provided with teeth (6-1) at the bottom, the other end of the rack block (6) is provided with a positioning screw mounting threaded hole (6-2), a positioning screw (5) perpendicular to the plane of the rack block (6) is correspondingly mounted in the positioning screw mounting threaded hole (6-2), the two rack blocks (6) are respectively mounted on the left and right sides of the measuring tool body (1) through a fixed block (2), a rotatable gear (4) is mounted in the fixed block (2) at the position corresponding to the mounting of the rack block (6), the two rack blocks (6) are arranged opposite to each other on one side with teeth (6-1), the gear (4) is located in the middle of the two rack blocks (6), and the gear (4) is meshed with the upper and lower rack blocks (6).

3. A column jack welding inspection fixture according to claim 2, characterized in that: A gear mounting hole (2-1) is provided on the fixing block (2) at a position corresponding to the mounting position of the gear (4); a fixing screw a (3) passes through the gear mounting hole (2-1) and the shaft hole of the gear (4) and is fixed to the inner wall of the measuring tool body (1); a tightening screw mounting hole (2-2) is provided on the fixing block (2) at a position close to the gear mounting hole (2-1); a tightening screw (13) is installed in the tightening screw mounting hole (2-2).

4. A column jack welding inspection fixture according to claim 3, characterized in that: The lower part of the measuring tool body (1) is provided with a groove for installing a fixing block (2); the fixing block (2) comprises a protruding block (2-3) at the upper part; a bayonet adapted to the protruding block (2-3) is provided in the groove of the measuring tool body (1); the protruding block (2-3) can be inserted into the bayonet.

5. The column jack welding inspection fixture according to claim 1, characterized in that: A slider (9) of matching shape is fixedly connected to the upper portion of the rear end of the reading plate (7); a slider mounting hole (7-2) is provided on the upper portion of the reading plate (7); a reading plate mounting hole (9-1) is provided on the slider (9) corresponding to the slider mounting hole (7-2); the reading plate (7) and the slider (9) are connected to the matching slider mounting hole (7-2) and the reading plate mounting hole (9-1) by bolts b (12).

6. The column jack welding inspection fixture according to claim 1, characterized in that: A limit block (8-1) is provided at the upper inner end of the telescopic rod (8); a limit groove (1-3) is provided in the telescopic rod hole a (1-1) corresponding to the limit block (8-1); a stop block (10) is sleeved at the position where the telescopic rod (8) extends out of the telescopic rod hole a (1-1); a telescopic rod hole b (10-1) matching the telescopic rod (8) is provided on the stop block (10); the telescopic rod hole b (10-1) is penetrated on the telescopic rod (8); and the stop block (10) is fixed to the end of the telescopic rod hole a (1-1).

7. A column jack welding inspection fixture according to claim 6, characterized in that: The stopper (10) is provided with fixing holes (10-2) at both ends, and the stopper (10) and the telescopic rod hole a (1-1) are positioned at the end of the telescopic rod hole a (1-1) by means of bolts a (11) passing through the fixing holes (10-2).

8. The column jack welding inspection fixture according to claim 1, characterized in that: The top surface of the guide rail (1-6) is a horizontal flat surface, and scale lines (1-2) are arranged on two side surfaces in the middle. The two side surfaces of the guide rail (1-6) corresponding to the scale lines (1-2) are vertical flat surfaces, and the top of the guide rail (1-6) is wider than the scale area in the middle. The two side surfaces of the upper part of the guide rail (1-6) are arc surfaces that transition from the wide top surface to the narrow scale area. The shape of the guide rail hole (7-1) of the reading plate (7) matches the outer contour of the guide rail (1-6).

9. The column jack welding inspection fixture according to claim 1, characterized in that: The telescopic rod hole a (1-1) at the lower end of the guide rail (1-6) and the radial cross-section of the telescopic rod (8) are triangular, one corner of the triangle is vertically located at the bottom, and the bottom of the guide rail (1-6) forms a fixed-point vertical state.

10. The column jack welding inspection fixture according to claim 6, characterized in that: The radial cross section of the limit block (8-1) on the telescopic rod (8) is triangular and smaller than the radial cross section of the telescopic rod (8), and the limit block (8-1) is shorter than the telescopic rod (8).

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