Device for measuring deflection of steel pipe based on single station

Abstract

The utility model discloses a device for measuring deflection of a steel pipe based on a single station, and belongs to the technical field of steel pipe measuring equipment. The device comprises two first supports, four second supports, two third supports, a fourth support, a bottom plate, two rotating shafts, three measuring rods, eight screws, four rolling bearings, four hinges, twenty-four screws and twenty-four nuts. The device can realize the purpose of accurately measuring the deflection of the single steel pipe which is horizontally arranged, and has the characteristics of low manufacturing cost, simplicity in operation and good use effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipe measuring equipment, and in particular relates to a device for measuring the deflection of a steel pipe based on a single station. Background Art

[0002] At present, steel pipes are usually produced by the process of hot rolling piercing + continuous pipe rolling + tension reducing. After tension reducing, the steel pipes need to be naturally cooled on a step-type cooling bed. Due to the combined effects of factors such as their own gravity, residual stress or uneven cooling, if the structural design of the step-type cooling bed is unreasonable, the steel pipe may have a certain deflection, which will directly affect the dimensional accuracy of the steel pipe and further affect the performance of the steel pipe. This requires measuring the deflection of each steel pipe so that the steel pipes whose deflections do not meet the accuracy requirements can be picked out and straightened. In view of this, some companies have successively developed measuring devices or measuring instruments for steel pipe deflection. Although the measurement accuracy of these measuring devices or measuring instruments is relatively high, they all have certain limitations to a greater or lesser extent. Some have relatively more work tasks and some have limited scope of use.

[0003] After searching, it was found that three literature patents are most relevant to the utility model technology, and the specific contents are described as follows:

[0004] Document CN 201510971843.0 discloses a pipe deflection measuring device and a measuring method, which mainly include a magnetic block, a clamping block, an infrared light source and a clamping ring assembly. The device evenly distributes an infrared emitting device on one end of the pipe to be measured, and installs a clamping ring assembly on the other end of the pipe to be measured. The deflection of the pipe to be measured is calculated according to the position of the infrared light source on the clamping ring, combined with the ring distance scale and angle scale marked on the clamping ring. Although the measurement accuracy of the device is relatively high, since the device needs to process a large amount of data, the device has relatively more work tasks.

[0005] Document CN 201721435144.5 discloses a formwork frame steel pipe compensating deflection measuring instrument, which mainly includes a measuring main scale, a handle, a support rod, a limit ring, a measuring window, a first measuring rod, a rotating ear, a second measuring rod, a main body, a connecting rod, a compression spring, a positioning block and a pointer. Although the device has the advantages of low manufacturing cost, simple operation and high measurement accuracy, it is not suitable for deflection measurement of longer steel pipes because it is operated by hand.

[0006] Document CN 201822115305.3 discloses a formwork frame steel pipe compensation deflection measuring instrument with an alarm function, which mainly includes a measuring main scale, a handle, a support rod, a limit ring, a measuring window, a measuring panel, a first measuring rod, a rotating ear, a second measuring rod, a main body, a connecting rod, a compression spring, a positioning block, a pointer, a photoelectric alarm, a power supply and a conductive plate. Although the device has the advantages of low manufacturing cost, simple operation and high measurement accuracy, it is not suitable for deflection measurement of longer steel pipes because it is operated by hand. Utility Model Content

[0007] In order to overcome one or more problems existing in the prior art, the utility model provides a device for measuring the deflection of a steel pipe based on a single station. The utility model is designed based on a symmetrical structure. The combined use of a base plate, a screw and a nut can realize both the relative setting of two first brackets and the relative setting of four second brackets; the use of screws can realize the linkage of the third bracket and the fourth bracket, and the use of the first bracket can realize the positioning and placement of the third bracket; the combined use of the second bracket and the rolling bearing can realize the directional rotation of the rotating shaft, and the combined use of the rotating shaft and the hinge can realize the positioning and swinging of the third bracket; the combined use of the three scale segments of the three measuring rods and the three fourth bosses of the fourth bracket can form three spiral micrometers, thereby achieving the purpose of accurately measuring the deflection of a single steel pipe. Therefore, the use effect of the device of the utility model is relatively good.

[0008] The technical solution adopted by the utility model to solve its technical problems is as follows.

[0009] The device for measuring the deflection of a steel pipe based on a single station provided by the utility model comprises: two first brackets, four second brackets, two third brackets, a fourth bracket, a bottom plate, two rotating shafts, three measuring rods, eight screws, four rolling bearings, four hinges, twenty-four screw rods and twenty-four nuts;

[0010] The first bracket is composed of a first body and a first boss connected together, the first body and the first boss are both rectangular parallelepiped symmetrical structures, and the first boss is located on the upper end surface of the first body; the first body is symmetrically provided with four cylindrical first through holes, and the screw is passed through the first through holes;

[0011] The second bracket is composed of a second body and a second boss connected together, the second body and the second boss are both rectangular parallelepiped symmetrical structures, the second boss is located on the upper end surface of the second body; the second body is symmetrically provided with four cylindrical fourth through holes, the screw rod is passed through the fourth through holes; the rear end surface of the second boss is provided with a cylindrical groove, the rolling bearing is passed through the groove; the axis position of the groove is provided with a cylindrical fifth through hole, the bearing section of the rotating shaft is passed through the fifth through hole;

[0012] The third bracket is composed of a third body and a third boss connected together, the third body and the third boss are both rectangular parallelepiped symmetrical structures, the third boss is located on the left end surface of the third body; the third body is symmetrically provided with four first screw holes, the screws are screwed into the first screw holes; the left end of the third boss is provided with a seventh through hole in the shape of a regular octagon, the locking section of the rotating shaft is penetrated into the seventh through hole;

[0013] The fourth bracket is composed of a fourth body and six fourth bosses connected together. The fourth body is a rectangular parallelepiped symmetrical structure. The six fourth bosses are divided into two groups and are relatively located on the left and right end faces of the fourth body. The fourth body is symmetrically provided with two groups of eight cylindrical eighth through holes, and the screws are penetrated in the eighth through holes. The fourth boss is a cylindrical symmetrical structure. The side surface of the fourth boss is evenly marked with fifty grid scales along the circumferential direction. A second screw hole is provided at the axis position of the fourth boss. The measuring rod is screwed into the second screw hole, and the second screw hole also penetrates the fourth body.

[0014] The measuring rod is composed of three parts: a coaxial contact section, a threaded section and a scale section. The contact section is a hemispherical symmetrical structure; the threaded section is a cylindrical symmetrical structure with a thread on the side, which is used to screw into the second screw hole of the fourth bracket, and the pitch value of the thread is 0.5mm; the scale section is a cylindrical symmetrical structure, and the side of the cylinder is evenly marked with four groups of scales along the circumferential direction, each group of scales is composed of two adjacent upper and lower rows of staggered scales, the staggered value of the two rows of staggered scales is 0.5mm, and the minimum grid value of the staggered scales is 1mm.

[0015] The rotating shaft is composed of a coaxial clamping section and two bearing sections connected together, and the two bearing sections are respectively located at the front and rear end faces of the clamping section; the clamping section is a regular octagonal symmetrical structure, which is used to penetrate the seventh through hole of the third bracket; the clamping section is symmetrically provided with two cylindrical sixth through holes, and the hinge is penetrated in the sixth through hole; the bearing section is a cylindrical symmetrical structure, which is used to penetrate the rolling bearing;

[0016] In some embodiments, the base plate is a symmetrical rectangular structure, and the base plate is symmetrically provided with four groups of sixteen cylindrical second through holes, and the screw rods are passed through the second through holes; the base plate is also symmetrically provided with two groups of eight cylindrical third through holes, and the screw rods are passed through the third through holes.

[0017] In some embodiments, the nut is screwed onto the threaded end of the screw.

[0018] In some embodiments, the screw, the rolling bearing, the hinge, the threaded rod and the nut are all standard parts.

[0019] The beneficial effects of the utility model are as follows:

[0020] 1) The device for measuring the deflection of a steel pipe based on a single station provided by the utility model includes two first brackets, four second brackets, two third brackets, a fourth bracket, a base plate, two rotating shafts, three measuring rods, eight screws, four rolling bearings, four hinges, twenty-four screws and twenty-four nuts. Since the material is common and easy to process and shape, the manufacturing cost of the device of the utility model is relatively low.

[0021] 2) When the device of the utility model is used, initially the two third brackets are both in a horizontal setting, the three measuring rods are all rotated to the zero scale position, the two third brackets are swung 90 degrees in the positive direction along the two rotating shafts so as to be in a vertical setting, the steel pipe is set in a position opposite to the two rotating shafts, the two third brackets are swung 90 degrees in the reverse direction along the two rotating shafts, and the two third bosses of the two third brackets are simultaneously set on the two first bosses of the two first brackets, the three measuring rods are screwed in respectively, and when the three contact sections respectively contact the outer surface of the steel pipe, the three measuring rods are stopped from being screwed in, and △A, △B and △C are read respectively, and the parameters are substituted into the formula for calculation. Therefore, the operation of the device of the utility model is relatively simple.

[0022] 3) The utility model is designed based on a symmetrical structure. The combined use of the base plate, the screw and the nut can realize both the relative setting of the two first brackets and the relative setting of the four second brackets; the use of the screws can realize the linkage of the third bracket and the fourth bracket, and the use of the first bracket can realize the positioning and placement of the third bracket; the combined use of the second bracket and the rolling bearing can realize the directional rotation of the rotating shaft, and the combined use of the rotating shaft and the hinge can realize the positioning and swinging of the third bracket; the combined use of the three scale segments of the three measuring rods and the three fourth bosses of the fourth bracket can form three spiral micrometers, thereby achieving the purpose of accurately measuring the deflection of a single steel pipe. Therefore, the use effect of the device of the utility model is relatively good.

[0023] The device for measuring the deflection of a steel pipe based on a single station provided by the utility model can achieve the purpose of accurately measuring the deflection of a single horizontally arranged steel pipe. The device of the utility model has the characteristics of low manufacturing cost, simple operation and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main structure of the device for measuring the deflection of a steel pipe based on a single station of the utility model when the third bracket is in an upright setting;

[0025] Figure 2 It is a left-side structural schematic diagram of the device for measuring the deflection of a steel pipe based on a single station of the utility model when the third bracket is in an upright setting;

[0026] Figure 3 It is a schematic diagram of the main structure of the device for measuring the deflection of a steel pipe based on a single station of the utility model when the third bracket is in a horizontal setting;

[0027] Figure 4 It is a left-side structural schematic diagram of the device for measuring the deflection of a steel pipe based on a single station of the utility model when the third bracket is in a horizontal arrangement;

[0028] Figure 5 It is a schematic diagram of the top view of the structure of the device for measuring the deflection of a steel pipe based on a single station of the utility model when the third bracket is in a horizontal arrangement;

[0029] Figure 6 It is a schematic diagram of the top view of the structure of the device for measuring the deflection of a steel pipe based on a single station of the utility model when the measuring rod is measuring;

[0030] Figure 7 This is a schematic diagram of the main structure of the first bracket of the device of the utility model;

[0031] Figure 8 It is a schematic diagram of the top view of the first bracket of the device of the utility model;

[0032] Fig. 9It is a top view structural schematic diagram of the bottom plate of the device of the utility model;

[0033] Fig.10 It is a schematic diagram of the main structure of the second bracket of the device of the utility model;

[0034] Fig.11 It is a schematic diagram of the top view of the second bracket of the device of the utility model;

[0035] Fig.12 It is a left-side structural schematic diagram of the rotating shaft of the device of the utility model;

[0036] Fig.13 This is a schematic diagram of the main structure of the third bracket of the device of the utility model;

[0037] Fig.14 It is a left-side structural schematic diagram of the third bracket of the device of the utility model;

[0038] Fig.15 It is a top view structural schematic diagram of the third bracket of the device of the utility model;

[0039] Fig.16 It is a schematic diagram of the top view of the measuring rod of the device of the utility model;

[0040] Fig.17 It is a left-side structural schematic diagram of the fourth bracket of the device of the utility model;

[0041] Fig.18 It is a schematic diagram of the top view of the structure of the fourth bracket of the device of the utility model;

[0042] Fig.19 This is a schematic diagram of the main structure of the third bracket of the device of the utility model swinging forward;

[0043] Fig. 20 This is a schematic diagram of the main structure of the third bracket of the device of the utility model swinging in the opposite direction;

[0044] Fig.21 It is a schematic diagram of the working principle of the device for measuring the deflection of a steel pipe based on a single station of the utility model;

[0045] Fig. 22 The utility model is a schematic diagram of the trapezoidal structure of the device for measuring the deflection of a steel pipe based on a single station.

[0046] Explanation of reference numerals: 1-first bracket; 101-first body; 102-first boss; 103-first through hole; 2-bottom plate; 201-second through hole; 202-third through hole; 3-second bracket; 301-second body; 302-second boss; 303-fourth through hole; 304-groove; 305-fifth through hole; 4-rotating shaft; 401-positioning section; 402-bearing section; 403-sixth through hole; 5-second Three brackets; 501-third body; 502-third boss; 503-first screw hole; 504-seventh through hole; 6-measuring rod; 601-contact section; 602-threaded section; 603-scale section; 7-fourth bracket; 701-fourth body; 702-fourth boss; 703-eighth through hole; 704-second screw hole; 8-screw; 9-rolling bearing; 10-hinge; 11-screw; 12-nut; 13-steel pipe. DETAILED DESCRIPTION

[0047] The content of the utility model is described in detail below through examples and drawings. The examples are only used to understand the utility model, but are not intended to limit the content of the utility model.

[0048] Combination Figures 1 to 6 As shown, the utility model provides a device for measuring the deflection of a steel pipe based on a single station, which includes two first brackets 1, four second brackets 3, two third brackets 5, a fourth bracket 7, a base plate 2, two rotating shafts 4, three measuring rods 6, eight screws 8, four rolling bearings 9, four hinges 10, twenty-four screws 11 and twenty-four nuts 12; wherein, two of the first brackets 1 are relatively arranged on the base plate 2, and are connected by eight of the screws 11 and eight of the nuts 12; four of the second brackets 3 are relatively arranged on the base plate 2 in pairs, and are connected by sixteen of the screws 11 and sixteen of the nuts 12; four of the rolling shafts are inserted into four grooves 304 of the four second brackets 3 Bearing 9, four bearing sections 402 of two rotating shafts 4 are inserted into the four rolling bearings 9; the two locking sections 401 of the two rotating shafts 4 are respectively inserted into the two seventh through holes 504 of the two oppositely arranged third brackets 5, and are positioned by the four hinges 10; the fourth body 701 of the fourth bracket 7 is arranged outside the right end surface of the two third bodies 501 of the two third brackets 5, and is connected by the eight screws 8; three measuring rods 6 are screwed into the three second screw holes 704 of the fourth bracket 7, and when the two third brackets 5 are in a horizontal arrangement, the two third bosses 502 of the two third brackets 5 are just arranged on the two first bosses 102 of the two first brackets 1.

[0049] The assembly process of the device for measuring the deflection of a steel pipe based on a single station provided by the utility model

[0050] Combination Figures 1 to 18 As shown, firstly, the base plate 2 is arranged on the mounting platform, and then the two first brackets 1 are arranged on the base plate 2 at the same time, and the eight first through holes 103 of the two first brackets 1 are aligned with the eight third through holes 202 of the base plate 2, and then eight screw rods 11 are passed through the eight groups of aligned through holes, and then eight nuts 12 are screwed on the threaded ends of the eight screw rods 11, so that the two first brackets 1 and the base plate 2 can be assembled;

[0051] Then, the two locking sections 401 of the two rotating shafts 4 are respectively inserted into the two seventh through holes 504 of the two third brackets 5 arranged opposite to each other, and then the four hinges 10 are installed in the four sixth through holes 403 of the two rotating shafts 4. In this way, the two rotating shafts 4 and the two third brackets 5 can be assembled.

[0052] Then, four rolling bearings 9 are installed in the four grooves 304 of the four second brackets 3, and then the four second brackets 3 are arranged opposite to each other in pairs, and then the four bearing sections 402 of the two rotating shafts 4 are inserted into the four rolling bearings 9, so that the four second brackets 3, the four rolling bearings 9 and the two rotating shafts 4 can be assembled;

[0053] Then, four second brackets 3 are simultaneously arranged on the bottom plate 2, and the sixteen fourth through holes 303 of the four second brackets 3 are aligned with the sixteen second through holes 201 of the bottom plate 2, and then sixteen screws 11 are passed through the sixteen aligned through holes, and then sixteen nuts 12 are screwed onto the threaded ends of the sixteen screws 11, so that the four second brackets 3 and the bottom plate 2 can be assembled;

[0054] Then, the two rotating shafts 4 are rotated simultaneously so as to simultaneously set the two third bosses 502 of the two third brackets 5 on the two first bosses 102 of the two first brackets 1, and then the fourth body 701 of the fourth bracket 7 is set outside the right end surfaces of the two third bodies 501 of the two third brackets 5, and the eight eighth through holes 703 of the fourth bracket 7 and the eight first screw holes 503 of the two third brackets 5 are aligned, and then the eight screws 8 are passed through the eight eighth through holes 703 and screwed into the eight first screw holes 503, so that the two third brackets 5 and the fourth bracket 7 can be assembled;

[0055] Finally, the three threaded sections 602 of the three measuring rods 6 are screwed into the three second screw holes 704 of the fourth bracket 7. In this way, the whole device is assembled and can be put into use.

[0056] Definition rules for the swing direction of the third bracket of the device for measuring the deflection of a steel pipe based on a single station provided by the utility model

[0057] Combination Figure 1 and Figure 3 As shown, based on the main structural diagram of the device of the utility model, for the convenience of description, the two rotating shafts 4 may be defined as point O, and point O is the swing axis of the two third brackets 5;

[0058] Combination Figure 3 As shown, it is assumed that the two third brackets 5 are initially in a horizontal arrangement, and after simplification, Fig.19 As shown, the two third brackets 5 simultaneously swing 90 degrees counterclockwise along point O, and the two third brackets 5 are both in an upright position. It may be appropriate to define this swinging direction of the third bracket 5 as a positive direction;

[0059] Combination Figure 1 As shown, it is assumed that the two third brackets 5 are initially in an upright position, and after simplification, Fig. 20 As shown, the two third brackets 5 simultaneously swing 90 degrees along point O in the clockwise direction, and the two third brackets 5 are both in a horizontal arrangement. It may be appropriate to define this swinging direction of the third brackets 5 as a reverse direction.

[0060] The working principle of the device for measuring the deflection of a steel pipe based on a single station provided by the utility model

[0061] Combination Figure 5 and Fig.21 As shown, for the convenience of description, the three measuring rods 6 located at the front end, rear end and middle end of the steel pipe 13 are defined as A, B and C respectively, the contact point positions of A, B and C at the zero scale position are defined as point A0, point B0 and point C0 respectively, and the contact point positions of A, B and C when tangent to the steel pipe 13 are defined as point A1, point B1 and point C1 respectively; the distances from A, B and C to the steel pipe 13 are defined as △A, △B and △C respectively, the distance from point A0 to point A1 is △A, the distance from point B0 to point B1 is △B, and the distance from point C0 to point C1 is △C; since the contact section 601 of the measuring rod 6 is a hemispherical symmetrical structure, as long as A, B and C are respectively screwed in by the distances of △A, △B and △C, then A, B and C all maintain a circular tangent relationship with the steel pipe 13;

[0062] Combination Fig.21As shown, connect point A0 and point B0, point C0 is the midpoint of line segment A0B0; connect point A1 and point B1, the distance between point C1 and point A1 and point B1 is equal; connect point A0 and point A1, connect point B0 and point B1, connect point C0 and point C1. Since △A is not necessarily equal to △B, but line segment A0A1 is parallel to line segment B0B1, it is not difficult to prove that quadrilateral A0A1B1B0 is a trapezoid, line segments A0A1 and B0B1 are the two bases, line segments A0B0 and line segment A1B1 are two waistlines, the average value of the two bottom sides (△A+△B) / 2 is the length of the median line, and the deflection of the steel pipe 13 is defined as Y, Y=△C-(△A+△B) / 2; if Y>0, it means that point C1 is outside the trapezoid, that is, point C1 is on the right side of line segment A1B1; if Y=0, it means that point C1 is above line segment A1B1, and the steel pipe 13 is straight at this time; if Y<0, it means that point C1 is inside the trapezoid, that is, point C1 is on the left side of line segment A1B1;

[0063] Combination Figure 5 As shown, the three scale segments 603 of the three measuring rods 6 and the three fourth bosses 702 of the fourth bracket 7 can be used together to form three screw micrometers, and the measurement accuracy of the three screw micrometers can reach 0.01mm. Reasoning process: Since the pitch value of the thread of the measuring rod 6 is 0.5mm, that is, the axial distance moved by the measuring rod 6 in the second screw hole 704 is 0.5mm for each rotation of the measuring rod 6. Since fifty grid scales are evenly marked on the side surface of the fourth boss 702 along the circumferential direction, the axial distance moved by the measuring rod 6 in the second screw hole 704 is 0.01mm for each rotation of the measuring rod 6 by one grid scale.

[0064] The utility model provides a method for using a device for measuring steel pipe deflection based on a single station

[0065] Assuming that the two third brackets 5 are initially in a horizontal setting, firstly, the three measuring rods 6 are rotated to the zero scale position, and then the two third brackets 5 are simultaneously swung 90 degrees in the positive direction along the two rotating shafts 4, so that the two third brackets 5 are in an upright setting, and then the steel pipe 13 is set at a position facing the two rotating shafts 4, as shown in FIG. Figure 1 and Figure 2 Then the two third brackets 5 are swung 90 degrees in the opposite direction along the two rotating shafts 4 at the same time, and the two third bosses 502 of the two third brackets 5 are simultaneously arranged on the two first bosses 102 of the two first brackets 1, as shown. Figures 3 to 5Then, the three measuring rods 6 are screwed in respectively, and when the three contact sections 601 of the three measuring rods 6 respectively contact the outer surface of the steel pipe 13, the screwing in of the three measuring rods 6 is stopped; then, the screwing in distances △A, △B and △C of the three measuring rods 6 are read respectively, as shown in FIG. Figure 5 and Figure 6 Then, the measured parameters are substituted into the formula Y = △C-(△A+△B) / 2, and the deflection Y of the steel pipe 13 can be calculated, such as Fig.21 and Fig. 22 shown.

[0066] Supplementary explanation: The device for measuring the deflection of a steel pipe based on a single station provided by the utility model is designed with a symmetrical structure. First, according to the outer diameter specification of the steel pipe, the setting height of the steel pipe and the fixed length of the steel pipe, multiple specifications of the device of the utility model should be designed and manufactured to match it.

[0067] It can be seen from the embodiments that the device for measuring the deflection of a steel pipe based on a single station provided by the utility model can achieve the purpose of accurately measuring the deflection of a single horizontally arranged steel pipe. The device of the utility model has the characteristics of low manufacturing cost, simple operation and good use effect.

[0068] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is 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 make equivalent replacements for some of the technical features therein.

Claims

1. A device for measuring the deflection of a steel pipe based on a single station, characterized in that: The device for measuring the deflection of a steel pipe based on a single station comprises: two first brackets (1), four second brackets (3), two third brackets (5), a fourth bracket (7), a base plate (2), two rotating shafts (4), three measuring rods (6), eight screws (8), four rolling bearings (9), four hinges (10), twenty-four screw rods (11) and twenty-four nuts (12), wherein: The first bracket (1) is composed of a first body (101) and a first boss (102) connected together; the first body (101) and the first boss (102) are both rectangular parallelepiped symmetrical structures; the first boss (102) is located on the upper end surface of the first body (101); the first body (101) is symmetrically provided with four cylindrical first through holes (103); the screw rod (11) is passed through the first through hole (103); The second bracket (3) is composed of a second body (301) and a second boss (302) connected together, the second body (301) and the second boss (302) are both rectangular parallelepiped symmetrical structures, and the second boss (302) is located on the upper end surface of the second body (301); the second body (301) is symmetrically provided with four cylindrical fourth through holes (303), and the screw (11) is passed through the fourth through holes (303); the rear end surface of the second boss (302) is provided with a cylindrical groove (304), and the rolling bearing (9) is passed through the groove (304); the axial position of the groove (304) is provided with a cylindrical fifth through hole (305), and the bearing section (402) of the rotating shaft (4) is passed through the fifth through hole (305); The third bracket (5) is composed of a third body (501) and a third boss (502) connected together. The third body (501) and the third boss (502) are both rectangular parallelepiped symmetrical structures. The third boss (502) is located on the left end surface of the third body (501); the third body (501) is symmetrically provided with four first screw holes (503), and the screws (8) are screwed into the first screw holes (503); the left end of the third boss (502) is provided with a seventh through hole (504) in the shape of a regular octagon, and the locking section (401) of the rotating shaft (4) is penetrated into the seventh through hole (504); The fourth bracket (7) is composed of a fourth body (701) and six fourth bosses (702) connected together. The fourth body (701) is a rectangular parallelepiped symmetrical structure. The six fourth bosses (702) are divided into two groups and are relatively located on the left and right end faces of the fourth body (701). The fourth body (701) is symmetrically provided with two groups of eight cylindrical eighth through holes (703) in total. The screws (8) are penetrated in the eighth through holes (703). The fourth boss (702) is a cylindrical symmetrical structure. The side surface of the fourth boss (702) is evenly marked with fifty grid scales along the circumferential direction. A second screw hole (704) is provided at the axis position of the fourth boss (702). The measuring rod (6) is screwed into the second screw hole (704). The second screw hole (704) also penetrates the fourth body (701). The measuring rod (6) is composed of three parts connected together, namely, a coaxial contact section (601), a threaded section (602) and a scale section (603); the contact section (601) is a hemispherical symmetrical structure; the threaded section (602) is a cylindrical symmetrical structure with a threaded side surface, used for screwing the second screw hole (704) of the fourth bracket (7), and the pitch value of the threaded section is 0.5 mm; the scale section (603) is a cylindrical symmetrical structure, and the side surface of the cylinder is evenly marked with four groups of scales along the circumferential direction, each group of scales is composed of two adjacent upper and lower rows of misaligned scales, the misalignment value of the two rows of misaligned scales is 0.5 mm, and the minimum grid value of the misaligned scales is 1 mm; The rotating shaft (4) is composed of a coaxial locking section (401) and two bearing sections (402) connected together, and the two bearing sections (402) are respectively located at the front and rear end surfaces of the locking section (401); the locking section (401) is a symmetrical structure in the shape of a regular octagonal prism, and is used to penetrate the seventh through hole (504) of the third bracket (5); the locking section (401) is symmetrically provided with two cylindrical sixth through holes (403), and the hinge (10) is penetrated in the sixth through hole (403); the bearing section (402) is a symmetrical structure in the shape of a cylinder, and is used to penetrate the rolling bearing (9).

2. The device for measuring steel pipe deflection based on a single station according to claim 1 is characterized in that: The bottom plate (2) is a symmetrical rectangular parallelepiped structure. The bottom plate (2) is symmetrically provided with four groups of sixteen cylindrical second through holes (201) in total, and the screw rods (11) are inserted into the second through holes (201). The bottom plate (2) is also symmetrically provided with two groups of eight cylindrical third through holes (202) in total, and the screw rods (11) are inserted into the third through holes (202).

3. The device for measuring steel pipe deflection based on a single station according to claim 1 is characterized in that: The threaded end of the screw rod (11) is screwed with the nut (12).

4. The device for measuring steel pipe deflection based on a single station according to claim 1 is characterized in that: The screw (8), the rolling bearing (9), the hinge (10), the screw rod (11) and the nut (12) are all standard parts.

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