Comprehensive inspection tool for lower protective pipe size

Abstract

The present invention proposes a comprehensive inspection tool for the size of the lower protective pipe, comprising: a base, which is arranged horizontally; a clamp, which is installed on the base and is used to clamp the steel pipe of the lower protective pipe; a detection seat, which is installed on the base at a position opposite to the clamp, and a contour measurement groove is provided on the side of the detection seat close to the clamp, and the contour measurement groove is used to place the disc of the lower protective pipe; a first detection component, which is arranged on the detection seat, and a plurality of mounting holes are provided on the large circular end of the disc of the lower protective pipe. The present invention is novel in design and simple in operation. Through the arrangement of the clamp and the like, a clamp for clamping and fixing the lower protective pipe is provided on the base, and the clamp fixes the overall position of the lower protective pipe. At the same time, the clamping area on the clamp can clamp and fix the lower protective pipe evenly, ensuring that the lower protective pipe is not damaged during the inspection process; at the same time, a roller is provided in the clamping area, which further facilitates the rotation of the lower protective pipe and facilitates subsequent inspection.

Description

Technical Field

[0001] The present invention relates to the technical field of inspection tools, in particular to a comprehensive inspection tool for the size of a lower protective pipe. Background Art

[0002] Position tolerance is the range of positional variation allowed for an axis or center plane of a shape. This refers to the range of variation allowed for the actual position of an axis or center plane. It limits the amount by which the measured element's actual position can vary from its ideal position. Position tolerance, when assessing the accuracy of an element's actual position, is based on the ideal position given on the drawing. Generally, position tolerance includes point position, line position, and surface position.

[0003] Profile error is the primary indicator used to describe surface dimensional accuracy. It refers to the variation of the measured actual profile relative to the ideal profile. This can be done with or without a datum.

[0004] Circular runout is the difference between the maximum and minimum readings measured in a given direction by a fixed indicator when the actual element being measured rotates around the reference axis without axial movement.

[0005] The current lower protective pipe is generally composed of a steel pipe and a disc (usually the steel pipe is welded to the disc), wherein the disc has a large round end and a small round end arranged coaxially. The steel pipe is generally installed on the large round end of the disc. This process requires ensuring that the steel pipe and the large round end are welded coaxially. However, during the installation process of the steel pipe and the large round end of the disc, their relative positions may change. Figure 1-2 As shown, the lower guard tube 25 is composed of a steel tube 251 and a circular disk 252. The circular disk 252 has a mounting hole 253 and a large round end 2521 and a small round end 2522. Existing methods for testing position, profile, and circular runout are complex, and require numerous inspections of the welded lower guard tube, which takes a long time and results in low inspection efficiency. Furthermore, existing inspection fixtures can cause uneven clamping force when clamping the object to be inspected, which can easily damage the object and make it inconvenient to use. Summary of the Invention

[0006] Based on the technical problems existing in the background technology, the present invention proposes a comprehensive inspection tool for the size of the lower protective pipe, including:

[0007] a base, the base being arranged horizontally;

[0008] A clamp, which is installed on the base and is used to clamp the steel pipe of the lower protective pipe;

[0009] The detection seat is installed on the base at a position opposite to the fixture, and a contour measurement groove is provided on the side of the detection seat close to the fixture, and the contour measurement groove is used to place the disc for placing the protective tube;

[0010] A first detection component is arranged on the detection seat, and a plurality of mounting holes are provided on the large circular end of the disc of the lower protective tube, and the first detection component is used to detect the position of the plurality of mounting holes on the large circular end;

[0011] The second detection component, the third detection component, and the fourth detection component are all arranged on the detection seat. The second detection component is used to detect the contour of the large circular end of the disc, the third detection component is used to detect the outer circumferential position of the small circular end of the disc, and the fourth detection component is used to detect the end face circular runout of the large circular end of the disc away from the steel pipe.

[0012] Preferably, the clamp includes two fixed blocks, clamp block 1, clamp block 2, and a driving member. The two fixed blocks are relatively installed on the base, clamp block 1 and clamp block 2 are respectively slidably installed on the two fixed blocks, and a clamping area with adjustable size is formed between clamp block 1 and clamp block 2. The clamping area is used to clamp the steel pipe of the lower protective pipe, and the driving member is used to drive clamp block 1 and clamp block 2 to move closer to or away from each other.

[0013] Preferably, the driving member includes a first thrust rod, and support blocks installed on the base are provided at the outer sides of clamp block 1 and clamp block 2. One end of the first thrust rod is connected to clamp block 1 and the other end thereof movably passes through the support block outside clamp block 1. The end of clamp block 1 close to clamp block 2 is connected to a connecting rod and the connecting rod slides through clamp block 2. The end of the connecting rod away from clamp block 1 is hinged to a transmission block, the middle position of the transmission block is hinged to the support block outside clamp block 2, the top of the transmission block is hinged to a second thrust rod, and the end of the second thrust rod away from the transmission block is connected to clamp block 2.

[0014] Preferably, the clamp further comprises a plurality of rollers, and the plurality of rollers are evenly distributed on a side where the first clamping block and the second clamping block are close to each other.

[0015] Preferably, the first detection component includes a measuring pin, and a plurality of through holes are provided on the detection seat, and the plurality of through holes correspond one-to-one to the plurality of mounting holes and are coaxially arranged with the mounting holes. The measuring pin has a first working state and a second working state. When the measuring pin is in the first working state, one end thereof can pass through the through hole and the mounting hole in sequence; when the measuring pin is in the second working state, one end thereof passes through the through hole but cannot pass through the mounting hole.

[0016] Preferably, the number of the mounting holes and the through holes are both three, the three mounting holes are arranged on the large circular end of the disc, the three through holes are arranged on the detection seat, and the three through holes correspond one to one to the three mounting holes and are coaxially arranged.

[0017] Preferably, the second detection component includes a go / no-go gauge, the contour measuring groove is circular, the disc of the lower protective tube is coaxially arranged with the contour measuring groove, and an annular gap is left between the large circular end of the disc and the contour measuring groove, and the go / no-go gauge has a first working state and a second working state. When the go / no-go gauge is in the first working state, the go gauge of the go / no-go gauge can be inserted into the annular gap and can slide in the annular gap, and the no-go gauge of the go / no-go gauge cannot be inserted into the annular gap; when the go / no-go gauge is in the second working state, the go gauge of the go / no-go gauge cannot be inserted into the annular gap or the no-go gauge of the go / no-go gauge can be inserted into the annular gap.

[0018] Preferably, the third detection component includes a dial indicator 1 and a probe 1, and the dial indicator 1 and probe 1 are vertically installed on the detection seat from top to bottom, and one end of the probe 1 extends into the contour measurement groove. The probe 1 can move in the vertical direction, and the top end of the probe 1 is pressed and connected with the measuring head of the dial indicator 1, and the bottom end of the probe 1 is pressed and connected with the outer circumference of the small round end of the disk.

[0019] Preferably, the fourth detection component includes a dial indicator 2 and a probe 2. The middle part of the probe 2 is hingedly mounted on the detection seat and one end of the probe 2 extends into the contour measurement groove. The dial indicator 2 is mounted on the detection seat. One end of the probe 2 is pressed against the end face of the large circular end of the disc away from the end face of the steel pipe, and the other end of the probe 2 is pressed against the measuring head of the dial indicator 2.

[0020] Preferably, the driving member further comprises a quick clamp, which is movably mounted on a support block adjacent to the first clamping block and connected to the first thrust rod, and is used to drive the first thrust rod to move. Of course, the need to drive the movement of the first thrust rod is not limited to the quick clamp, and other components capable of driving the movement of the first thrust rod may also be provided, as long as the purpose of moving the first thrust rod is achieved.

[0021] Compared with the existing technology, the comprehensive inspection tool for the size of the lower protective pipe proposed by the present invention adopts the above technical solution and achieves the following technical effects:

[0022] 1. Through the setting of clamps, etc., a clamp for clamping and fixing the lower protective tube is provided on the base. The clamp fixes the overall position of the lower protective tube. At the same time, the clamping area on the clamp can clamp and fix the lower protective tube evenly, ensuring that the lower protective tube is not damaged during the inspection process; at the same time, a roller is provided in the clamping area to further facilitate the rotation of the lower protective tube and facilitate subsequent inspection;

[0023] 2. Through the arrangement of the first detection component and the second detection component, the first detection component (5) is used to detect whether the position of the plurality of mounting holes on the large circular end meets the requirements, the second detection component is used to detect whether the contour of the large circular end of the disc meets the requirements, the third detection component is used to detect whether the outer circumferential position of the small circular end of the disc meets the requirements, and the fourth detection component is used to detect whether the end face runout of the large circular end of the disc away from the steel pipe meets the requirements. The staff can perform the above four detections in no particular order. By using the four detection components, the detection is fast, the operation is simple, and the use is convenient, which greatly improves the efficiency and effect of the lower protective pipe detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the lower protective pipe from the first perspective;

[0025] Figure 2 This is a schematic diagram of the overall structure of the lower protective tube from a second perspective;

[0026] Figure 3 This is a schematic diagram of the overall structure of the present invention from a first perspective;

[0027] Figure 4 This is a schematic diagram of the overall structure of the present invention from a second viewing angle;

[0028] Figure 5 This is a schematic diagram of the overall structure of the present invention from a third viewing angle;

[0029] Figure 6 This is a schematic diagram of the overall structure of the present invention from a fourth viewing angle;

[0030] Figure 7 Schematic diagram of the overall structure of the clamp of the present invention;

[0031] Figure 8 It is a schematic diagram of the overall structure of the detection seat, the third detection component and the fourth detection component of the present invention.

[0032] In the figure: 1. Base, 2. Clamp, 3. Detection seat, 4. Contour measuring groove, 5. First detection component, 6. Second detection component, 7. Third detection component, 8. Fourth detection component, 9. Fixed block, 10. Clamping block 1, 11. Clamping block 2, 12. Support block, 13. First thrust rod, 14. Second thrust rod, 15. Transmission block, 16. Connecting rod, 17. Roller, 18. Through hole, 19. Annular gap, 20. Dial indicator 1, 21. Probe 1, 22. Dial indicator 2, 23. Probe 2, 24. Quick clamp, 25. Lower slide tube, 251. Steel pipe, 252. Disc, 2521. Large round end of disc, 2522. Small round end of disc, 253. Mounting hole. DETAILED DESCRIPTION

[0033] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] Reference Figure 1-2 , Figure 1 This is a schematic diagram of the overall structure of the lower protective pipe from the first perspective; Figure 2 The figure shows the overall structure of the lower protective tube from a second perspective. The lower protective tube 25 is composed of a steel tube 251 and a circular disc 252. The circular disc 252 is provided with a mounting hole 253 and has a large circular end 2521 and a small circular end 2522. Generally, the connection between the steel tube 251 and the circular disc 252 is welded, while the small circular end 2522 and the mounting hole 253 are formed during the subsequent machining of the circular disc 252. During these multiple machining steps, the position of the mounting hole 253, the profile of the large circular end 2521 of the circular disc, the outer circumferential position of the small circular end 2522 of the circular disc, and the end face runout of the large circular end 2521 away from the steel tube may vary. This inspection fixture can be used to clamp and secure the lower protective tube 25 and quickly perform multiple inspection steps on it, making it easy to use.

[0036] Reference Figure 3-8 The present invention proposes a comprehensive inspection tool for the size of the lower protective pipe, comprising:

[0037] Base 1, base 1 is arranged horizontally;

[0038] Clamp 2, which is installed on the base 1 and is used to clamp the steel pipe 251 of the lower protective pipe 25;

[0039] The detection base 3 is installed on the base 1 at a position opposite to the clamp 2, and a profile measurement groove 4 is provided on the side of the detection base 3 close to the clamp 2. When the clamp 2 clamps the steel pipe 251 of the lower protective tube 25, the disk 252 of the lower protective tube 25 is placed in the profile measurement groove 4, and the disk 252 and the profile measurement groove 4 are arranged coaxially;

[0040] The first detection component 5 is arranged on the detection seat 3. A plurality of mounting holes 253 are provided on the large circular end 2521 of the disc of the lower protective tube 25. The first detection component 5 is used to detect whether the position of the plurality of mounting holes 253 on the large circular end 2521 meets the requirements;

[0041] The second detection component 6, the third detection component 7, and the fourth detection component 8 are all arranged on the detection seat 3. The second detection component 6 is used to detect whether the contour of the large circular end 2521 of the disc meets the requirements, the third detection component 7 is used to detect whether the outer circumferential position of the small circular end 2522 of the disc meets the requirements, and the fourth detection component 8 is used to detect whether the end face circular runout of the large circular end 2521 of the disc away from the steel pipe 251 meets the requirements.

[0042] For the above-mentioned clamp 2, the clamp 2 includes two fixed blocks 9, a clamping block 10, a clamping block 2 11, and a driving member. The two fixed blocks 9 are relatively installed on the base 1, and the clamping block 10 and the clamping block 2 11 are respectively slidably installed on the two fixed blocks 9, and a clamping area with adjustable size is formed between the clamping block 10 and the clamping block 2 11. The clamping area is used to clamp the steel pipe 251 of the lower protective tube 25. The driving member is used to drive the clamping block 10 and the clamping block 2 11 to move closer to or away from each other. During detection, the driving member drives the clamping block 10 and the clamping block 2 11 to move closer to each other and clamp the steel pipe 251 in the clamping area.

[0043] In order to achieve the purpose of clamping the steel pipe 251 and protect the clamped steel pipe 251 to prevent it from being damaged due to uneven force, a driving member is provided, including a first thrust rod 13, and support blocks 12 installed on the base 1 are provided at the outer positions of clamp block 10 and clamp block 2 11. One end of the first thrust rod 13 is connected to clamp block 10 and the other end thereof can move through the support block 12 outside clamp block 10. The end of clamp block 10 close to clamp block 2 11 is connected to a connecting rod 16 and the connecting rod 16 slides through clamp block 2 10. The end of the connecting rod 16 away from clamp block 10 is hinged to a transmission block 15. The middle position of the transmission block 15 is hinged to the support block 12 outside clamp block 2 11. The top of the transmission block 15 is hinged to a second thrust rod 14, and the end of the second thrust rod 14 away from the transmission block 15 is connected to clamp block 2 11. The driving member stably drives the clamping blocks 10 and 11, ensuring a uniform clamping force between the clamping blocks 10 and 2 on the steel pipe 251. To further enhance the protection of the steel pipe 251, a buffer spring can be provided on the connecting rod 16. The elasticity of the buffer spring ensures a more uniform clamping force on the steel pipe 251.

[0044] To ensure that after clamping blocks 10 and 11 clamp the steel tube 251, the steel tube 251 can rotate rapidly within the clamping zone formed thereby, facilitating subsequent testing, multiple rollers 17 are added to the clamp 2. These rollers 17 are evenly distributed on the side where clamping blocks 10 and 11 are close to each other. Furthermore, to facilitate the rapid movement of the first thrust rod 13, a quick-action clamp 24 is movably mounted on clamping block 10 and connected to the first thrust rod 13. The quick-action clamp 24 is used to drive the movement of the first thrust rod 13.

[0045] Reference Figure 7, the specific working process: when the quick clamp 24 drives the first thrust rod 13 to move to the right, the first thrust rod 13 can drive the clamping block 10 to move to the right on the fixed block 9 on the left, and the rightward movement of the clamping block 10 can drive the connecting rod 16 to move to the right. The rightward movement of the connecting rod 16 will drive the transmission block 15 hinged thereto to rotate, and the transmission block 15 will rotate counterclockwise around the center of its part, that is, the bottom end of the transmission block 15 will rotate to the right on the trajectory circle formed by it, and the top end of the transmission block 15 will move to the left on the trajectory circle formed by it. The leftward movement of the top end of the transmission block 15 can drive the hinged The second push-pull rod 14 moves to the left, and the second thrust rod 14 will drive the clamp block 2 11 to move to the left on the fixed block 9 on the right; then, driven by the quick clamp 24, the clamp block 10 will move to the right, and the clamp block 2 11 will move to the left, that is, the clamping area formed between the clamp block 10 and the clamp block 2 11 gradually shrinks, and then the steel pipe 251 of the lower protective tube 25 is placed in the clamping area, and the disc 252 of the lower protective tube 25 is placed in the contour measuring groove 4. When the clamping area gradually shrinks to a certain extent, the steel pipe 251 will be clamped and fixed, that is, the lower protective tube 25 as a whole will be clamped and fixed, which is convenient for subsequent multi-pass detection processes.

[0046] After the fixture 2 has clamped and fixed the lower protective tube 25 as a whole, the staff can use this inspection fixture to perform the following four inspection processes on the lower protective tube 25:

[0047] 1. Check the position of the multiple mounting holes 253 on the large round end 2521 of the lower protective tube: The first detection component 5 includes a measuring pin. The detection base 3 is provided with multiple through holes 18. The multiple through holes 18 are arranged one-to-one with the multiple mounting holes 253. The through holes 18 and the mounting holes 253 are arranged coaxially. During the detection, the staff will insert one end of the measuring pin from the back of the detection base 3 (refer to Figure 6 , with the side of the lower protective tube 25 having the steel pipe 251 as the front side) passing through the through hole 18, and then inserting the end into the mounting hole 253. If the end can be inserted into the mounting hole 253, it indicates that the position accuracy of the mounting hole 253 meets the requirements; if one end of the measuring pin passes through the through hole 18 but cannot be inserted into the mounting hole 253, then the position accuracy of the mounting hole 253 does not meet the requirements. The multiple mounting holes 253 on the multiple large circular ends 2521 are tested in sequence to detect whether the mounting holes 253 at specific locations meet the position accuracy. Preferably, three mounting holes 253 are opened on the large circular end 2521 of the disk, and accordingly, three through holes 18 are also set. The three mounting holes 253 are arranged in a circumferential array on the large circular end 2521 of the disk, and the three through holes 18 are arranged in a circumferential array on the detection base 3. The three through holes 18 are arranged in a one-to-one correspondence with the three mounting holes 253. The staff can use a single measuring pin to test the three mounting holes 253 in sequence.

[0048] 2. Detect the contour of the large circular end 2521 of the disc: The second detection component 6 includes a go / no-go gauge, the contour measuring groove 4 is circular, the disc 252 of the lower protective tube is coaxially arranged with the contour measuring groove 4, and an annular gap 19 is left between the large circular end 2521 of the disc and the contour measuring groove 4. During the detection, the staff first inserts the go / no-go gauge into the annular gap 19, and then refers to the Figure 6 , where the three mounting holes 253 divide the annular gap 19 into three arc-shaped areas. If the go gauge can be inserted into one of the arc-shaped areas (located in the upper position), then the go gauge is slid in the arc-shaped area and pulled out. Then, the stop gauge of the go and stop gauge is inserted into the annular gap 19. If the stop gauge cannot be inserted, it indicates that this arc-shaped area meets the requirements; then the staff can rotate the steel pipe 251, and then rotate the other arc-shaped area to the upper position, and then repeat the above operation, back and forth, insert and slide the go and stop gauge into the other two annular areas to detect whether the annular area is qualified or not. If the go gauge of the go and stop gauge can be inserted into the three annular areas in sequence, and the stop gauge of the go and stop gauge cannot be inserted into the three annular areas, it indicates that the contour of the large circular end 2521 of the disc meets the requirements; on the contrary, if the number of annular areas that the go gauge of the go and stop gauge can be inserted into is less than three, or the number of annular areas that the stop gauge of the go and stop gauge can be inserted into is greater than one, it indicates that the contour of the large circular end 2521 of the disc does not meet the requirements.

[0049] Generally, the annular area of ​​the annular gap 19 is set with a ring width of 10 mm, the go gauge diameter of the go / no-go gauge is 9.75 mm, and the no-go gauge diameter of the go / no-go gauge is 10.25 mm, that is, the go gauge with a diameter of 9.75 mm can be inserted into the annular area with a ring width of 10 mm and can slide therein, and the no-go gauge with a diameter of 10.25 mm cannot be inserted into the annular area with a ring width of 10 mm, which indicates that the contour of the large circular end 2521 of the disc meets the requirements, otherwise, it does not meet the requirements.

[0050] 3. Detecting the outer circumferential position of the small round end 2522 of the disc: The third detection assembly 7 includes a dial indicator 20 and a probe 21. The dial indicator 20 and the probe 21 are vertically installed on the detection base 3 from top to bottom, and one end of each probe extends into the contour measurement groove 4. The probe 21 can move in the vertical direction. The top end of the probe 21 is pressed and connected with the measuring head of the dial indicator 20, and the bottom end of the probe 21 is pressed and connected with the outer circumference of the small round end 2522 of the disc. During the inspection, the staff rotates the steel pipe 251, and the disc 252 will rotate in the contour measuring groove 3. The bottom end of the probe 21 is always pressed and connected with the outer circumference of the small round end 2522 of the disc. If the pointer of the dial indicator 20 has no swing amplitude or a small swing amplitude during the process of the steel pipe 251 driving the disc 252 to rotate, it indicates that the position of the outer circumference of the small round end 2522 of the disc meets the requirements; if the pointer of the dial indicator 20 swings a large amplitude during the process of the steel pipe 251 driving the disc 252 to rotate, it indicates that the position of the outer circumference of the small round end 2522 of the disc does not meet the requirements, that is, during the rotation of the disc 252, the outer circumference of the small round end 2522 of the disc drives the probe 21 to move up and down with a large amplitude. Since the top end of the probe 21 is pressed and connected with the measuring head of the dial indicator 20, the movement of the probe 21 is intuitively represented by the swing amplitude of the pointer of the dial indicator 20.

[0051] 4. Detect the circular runout of the end face of the large circular end 2521 of the disc away from the steel pipe 251: The fourth detection component 8 includes a dial indicator 22 and a probe 23. The middle position of the probe 23 is hingedly mounted on the detection seat 3 and one end of the probe 2 extends into the contour measuring groove 4. The dial indicator 22 is mounted on the detection seat 3. One end of the probe 23 is pressed and connected to the end face of the large circular end 2521 of the disc away from the steel pipe 251, and the other end of the probe 23 is pressed and connected to the measuring head of the dial indicator 22. Referring to 3, the probe 23 can rotate horizontally. During the inspection, the staff rotates the steel pipe 251, and the rotation of the steel pipe 251 drives the disc 252 to rotate, and then the large circular end 2521 of the disc will rotate away from the end face of the steel pipe 251. If the pointer of the dial indicator 22 has no swing amplitude or a small swing amplitude during the rotation of the large circular end 2521 of the disc away from the end face of the steel pipe, it indicates that the circular runout of the large circular end 2521 of the disc away from the end face of the steel pipe 251 meets the requirements; if the large circular end 2521 of the disc rotates away from the end face of the steel pipe During the process, if the pointer of dial indicator 22 swings with a large amplitude, it indicates that the large circular end 2521 of the disc is away from the end face circular runout of the steel pipe 251 and does not meet the requirements, that is, during the rotation of the disc 252, the end face drives the probe 23 to rotate with a large amplitude, that is, the probe 23 will rotate with its central hinge position as the center of the circle, and the probe 23 and the end face are pressed against and rotated with a large amplitude, which will then be transmitted to the measuring head of dial indicator 22. The swing amplitude of the pointer of dial indicator 22 corresponds to its rotation amplitude, which intuitively represents the rotation amplitude of probe 23.

[0052] It should be noted that there is no specific inspection order requirement for the above four inspections of the lower protective pipe 25, and the staff can conduct them according to the actual situation.

[0053] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. The comprehensive inspection tool for the size of the lower protective tube is characterized by: include: A base (1), wherein the base (1) is arranged horizontally; A clamp (2), the clamp (2) being mounted on the base (1), and the clamp (2) being used to clamp the steel pipe of the lower protective pipe; A detection seat (3), the detection seat (3) being mounted on the base (1) at a position opposite to the fixture (2), and a profile measuring groove (4) is provided on a side of the detection seat (3) close to the fixture (2), the profile measuring groove (4) being used to place a disc for placing the protective tube; A first detection component (5), the first detection component (5) is arranged on the detection seat (3), a plurality of mounting holes are provided on the large circular end of the disc of the lower protective tube, and the first detection component (5) is used to detect the position of the plurality of mounting holes on the large circular end; A second detection assembly (6), a third detection assembly (7), and a fourth detection assembly (8), wherein the second detection assembly (6), the third detection assembly (7), and the fourth detection assembly (8) are all arranged on the detection seat (3), the second detection assembly (6) is used to detect the contour of the large circular end of the disk, the third detection assembly (7) is used to detect the outer circumferential position of the small circular end of the disk, and the fourth detection assembly (8) is used to detect the end face circular runout of the large circular end of the disk away from the steel pipe; The clamp (2) comprises two fixed blocks (9), a clamping block 1 (10), a clamping block 2 (11), and a driving member. The two fixed blocks (9) are relatively mounted on the base (1). The clamping block 1 (10) and the clamping block 2 (11) are slidably mounted on the two fixed blocks (9), and a clamping area with adjustable size is formed between the clamping block 1 (10) and the clamping block 2 (11). The clamping area is used to clamp the steel pipe of the lower protective pipe. The driving member is used to drive the clamping block 1 (10) and the clamping block 2 (11) to move closer to or away from each other. The driving member includes a first thrust rod (13), and support blocks (12) mounted on the base (1) are provided at the outer positions of the clamping block 1 (10) and the clamping block 2 (11). One end of the first thrust rod (13) is connected to the clamping block 1 (10), and the other end thereof movably passes through the support block (12) outside the clamping block 1 (10). The end of the clamping block 1 (10) close to the clamping block 2 (11) is connected to a connecting rod (16), and the connecting rod (16) slides through the clamping block 2 (10). The end of the connecting rod (16) away from the clamping block 1 (10) is hinged to a transmission block (15). The middle position of the transmission block (15) is hinged to the support block (12) outside the clamping block 2 (11). The top end of the transmission block (15) is hinged to a second thrust rod (14), and the end of the second thrust rod (14) away from the transmission block (15) is connected to the clamping block 2 (11). The lower protective tube (25) is composed of a steel tube (251) and a circular disc (252). The circular disc (252) is provided with a mounting hole (253), and the circular disc (252) has a large circular end (2521) and a small circular end (2522).

2. The comprehensive inspection tool for the size of the lower protective pipe according to claim 1 is characterized in that: The clamp (2) further comprises a plurality of rollers (17), and the plurality of rollers (17) are evenly distributed on a side where the clamping block 1 (10) and the clamping block 2 (11) are close to each other.

3. The comprehensive inspection tool for the size of the lower protective pipe according to claim 2 is characterized in that: The first detection assembly (5) includes a measuring pin. The detection seat (3) is provided with a plurality of through holes (18). The plurality of through holes (18) correspond to the plurality of mounting holes one by one and are coaxially arranged with the mounting holes. The measuring pin has a first working state and a second working state. When the measuring pin is in the first working state, one end thereof can pass through the through hole (18) and the mounting hole in sequence; when the measuring pin is in the second working state, one end thereof passes through the through hole (18) but cannot pass through the mounting hole.

4. The comprehensive inspection tool for the size of the lower protective pipe according to claim 3 is characterized in that: The number of the mounting holes and the through holes (18) is three, the three mounting holes are arranged on the large circular end of the disc, the three through holes (18) are arranged on the detection seat (3), and the three through holes (18) correspond to the three mounting holes one by one and are coaxially arranged.

5. The comprehensive inspection tool for the size of the lower protective pipe according to claim 4 is characterized in that: The second detection component (6) includes a go / no-go gauge, the contour measuring groove (4) is circular, the disc of the lower protective tube is coaxially arranged with the contour measuring groove (4), and an annular gap (19) is left between the large circular end of the disc and the contour measuring groove (4), and the go / no-go gauge has a first working state and a second working state. When the go / no-go gauge is in the first working state, the go / no-go gauge of the go / no-go gauge can be inserted into the annular gap (19) and can slide in the annular gap (19), and the stop gauge of the go / no-go gauge cannot be inserted into the annular gap (19); when the go / no-go gauge is in the second working state, the go / no-go gauge of the go / no-go gauge cannot be inserted into the annular gap (19) or the stop gauge of the go / no-go gauge can be inserted into the annular gap (19).

6. The comprehensive inspection tool for the size of the lower protective pipe according to claim 5, characterized in that: The third detection component (7) includes a dial indicator (20) and a probe (21). The dial indicator (20) and the probe (21) are vertically installed on the detection base (3) from top to bottom, and one end of the probe (21) extends into the contour measurement groove (4). The probe (21) can move in the vertical direction. The top end of the probe (21) is pressed and connected with the measuring head of the dial indicator (20), and the bottom end of the probe (21) is pressed and connected with the outer circumference of the small round end of the disk.

7. The comprehensive inspection tool for the size of the lower protective pipe according to claim 6, characterized in that: The fourth detection assembly (8) includes a second dial indicator (22) and a second probe (23). The middle portion of the second probe (23) is hingedly mounted on the detection seat (3) and one end thereof extends into the contour measurement groove (4). The second dial indicator (22) is mounted on the detection seat (3). One end of the second probe (23) is pressed against the end face of the large circular end of the disc away from the end face of the steel pipe, and the other end of the second probe (23) is pressed against the measuring head of the second dial indicator (22).

8. The comprehensive inspection tool for the size of the lower protective pipe according to claim 7, characterized in that: The driving member further includes a quick clamp (24), which is movably mounted on a support block (12) near the clamp block 1 (10) and connected to the first thrust rod (13). The quick clamp (24) is used to drive the first thrust rod (13) to move.

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