Device for integrally measuring end face cutting inclination of steel pipe

Abstract

The utility model discloses a device for integrally measuring the end face cutting inclination of a steel pipe, and belongs to the technical field of steel pipe measuring equipment. The device comprises four first supports, a second support, a third support, a fourth support, two fifth supports, eight positioning rods, four measuring rods, a rotating shaft, thirty-two screws and two rolling bearings, and can accurately and stably position the inner surface of the steel pipe and measure the cutting inclination of the end face of the steel pipe. Therefore, the end face cutting inclination of the steel pipe can be effectively measured and calculated, and the device has the advantages of being low in manufacturing cost, easy to operate and good in using 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 inclination of the end face of a steel pipe based on an integral type. Background Art

[0002] At present, seamless steel pipes are usually produced by continuous pipe rolling. In order to improve sawing efficiency, multiple closely packed steel pipes are usually uniformly sawed to a fixed length. If the rotating plane of the circular saw or the sawing plane of the band saw is not perpendicular to the axis of the steel pipe, the pipe end will be cut obliquely. If the steel pipes for butt welding have pipe ends that are cut obliquely, on the one hand, the gap of the butt weld will be wedge-shaped, thereby increasing the difficulty of welding; on the other hand, the straightness of the pipeline will be reduced, thereby increasing the resistance to transportation. Therefore, pipeline welding construction units usually measure the inclination of the steel pipe ends one by one, so as to be able to promptly remove the steel pipes that do not meet the accuracy requirements; usually, manual measurement is performed with the use of a square ruler and a feeler gauge, but the reliability of this measurement method is relatively poor. In view of this, some companies have successively developed pipe end inclination measuring instruments or measuring devices, but these measuring instruments or measuring devices do not have the function of finding the pipe end inclination, which invisibly increases the workload of measurement.

[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] Patent document CN 200920106190.X discloses an automatic measuring instrument for the bevel of a steel pipe end, which mainly includes a measuring probe, a spring, a transmission slide rod, a pin, a bracket, a limit pin, a slider, a guide rail, a signal converter, a data cable and a PC terminal. The automation level and measurement accuracy of the patented device are relatively high, but because the patented device cannot quickly find the bevel of the steel pipe end, the bevel can only be determined by screening a large amount of data. Therefore, the workload of the patented device is relatively large.

[0005] Patent document CN 201120394616.3 discloses a device for measuring the bevel of a steel pipe end, which mainly includes a rotating shaft, a cantilever, a guide rail, a sliding rod, a scale, a slider, a spring, a lever arm, a measuring head, a bracket and a pulley. The measurement accuracy of the patented device is relatively high, but because the patented device cannot quickly find the bevel of the steel pipe end, the bevel can only be determined by screening a large amount of data. Therefore, the workload of the patented device is relatively large.

[0006] Patent document CN 201621041797.0 discloses a pipe end bevel measuring device, which mainly includes a control module, a track, a drive wheel, a base plate, a gearbox, a motor, a guide rail, a slider, a lead screw, a cross arm, a support arm, a proximity sensor, a distance sensor and a detection head. The automation level and measurement accuracy of the patented device are relatively high, but because the patented device cannot quickly find the bevel of the steel pipe end, the bevel can only be determined by screening a large amount of data. Therefore, the workload of the patented device is relatively large. 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 inclination of the end face of a steel pipe based on an integral type. The device of the utility model is designed with a symmetrical structure. The use of screws can realize the relative setting of the first bracket and the fifth bracket; the combined use of the first bracket and the positioning rod can realize the precise positioning of the steel pipe, and the combined use of the fifth bracket and the rolling bearing can realize the directional rotation of the rotating shaft; the combined use of the third bracket and the fourth bracket can realize the linkage of the second bracket and the shaft rotation, and the combined use of the second bracket and the measuring rod can realize both the function of finding the inclination of the pipe end and the function of measuring the inclination of the pipe end; the combined use of the eight first scale segments of the eight positioning rods and the eight first bosses of the four first brackets can form eight spiral micrometers, and the combined use of the four second scale segments of the four measuring rods and the four fifth bosses of the second bracket can form four spiral micrometers. 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 problem is as follows.

[0009] The device for measuring the inclination of the end face of a steel pipe provided by the utility model comprises four first brackets, one second bracket, one third bracket, one fourth bracket, two fifth brackets, eight positioning rods, four measuring rods, one rotating shaft, thirty-two screws and two rolling bearings;

[0010] The first bracket is composed of a first body and four first bosses connected together. The first body is a rectangular parallelepiped symmetrical structure. The four first bosses are arranged opposite to each other in pairs and are respectively located on the upper and lower end surfaces of the first body; the first body is symmetrically provided with two groups of eight cylindrical first through holes, and the screws are penetrated in the first through holes; the first boss is a cylindrical symmetrical structure, and the side surface of the first boss is evenly marked with fifty grid scales along the circumferential direction; a first screw hole is provided at the axis position of the first boss, and the positioning rod is screwed into the first screw hole, and the first screw hole also penetrates the first body;

[0011] The second bracket is composed of a second body, four second bosses, four third bosses, eight fourth bosses and eight fifth bosses. The second body, the second bosses and the third bosses are all rectangular parallelepiped symmetrical structures, and the fourth bosses and the fifth bosses are all cylindrical symmetrical structures. The four second bosses are respectively located on the upper, lower, front and rear end faces of the second body, the four third bosses are respectively located on the upper, lower, front and rear end faces of the four second bosses, the eight fourth bosses are divided into two groups and are relatively located on the left and right end faces of the second body, and the eight fifth bosses are arranged in pairs and are respectively located on the left and right eight end faces of the four third bosses; a regular octagonal second through hole is provided at the center of the second body, and the clamping section of the rotating shaft is penetrated in the second through hole; fifty grid scales are evenly marked on the side of the fifth boss along the circumferential direction; a second screw hole is provided at the axis position of the fifth boss, the measuring rod is screwed into the second screw hole, and the second screw hole also runs through the third boss;

[0012] The third bracket is composed of a coaxial third body and a sixth boss connected together, the third body and the sixth boss are both cylindrical symmetrical structures, and the sixth boss is located on the left end surface of the third body; a cylindrical first groove is provided on the right end surface of the third body, and the first groove is provided with a clamping section of the rotating shaft and the fourth boss of the second bracket; a third screw hole is provided at the axial position of the sixth boss, and the third threaded section of the rotating shaft is screwed into the third screw hole, and the third screw hole and the first groove are coaxially connected;

[0013] The fourth bracket is composed of a coaxial fourth body and a seventh boss connected together, the fourth body and the seventh boss are both cylindrical symmetrical structures, and the seventh boss is located on the right end face of the fourth body; the left end face of the fourth body is evenly provided with four cylindrical second grooves along the circumferential direction, and the fourth boss of the second bracket is penetrated in the second groove; a third through hole in the shape of a regular octagon is provided at the axial position of the seventh boss, and the locking section of the rotating shaft is penetrated in the third through hole, and the third through hole also runs through the fourth body;

[0014] The fifth bracket is composed of a fifth body, four eighth bosses and four ninth bosses connected together. The fifth body, the eighth boss and the ninth boss are all rectangular parallelepiped symmetrical structures. The four eighth bosses are respectively located on the upper, lower, front and rear end faces of the fifth body, and the four ninth bosses are respectively located on the upper, lower, front and rear end faces of the four eighth bosses; a cylindrical third groove is provided on the left end face of the fifth body, and the rolling bearing is penetrated in the third groove; a cylindrical fourth through hole is provided at the axial position of the third groove, and the first bearing section or the second bearing section of the rotating shaft is penetrated in the fourth through hole; four fourth screw holes are symmetrically provided on the ninth boss, and the screws are screwed in the fourth screw holes;

[0015] The positioning rod is composed of three parts: a coaxial first contact section, a first thread section and a first scale section. The first contact section is a truncated cone-shaped symmetrical structure, which is used to contact the inner surface of the steel pipe; the first thread section is a cylindrical symmetrical structure with a thread on the side, which is used to screw the first screw hole of the first bracket, and the pitch value of the thread is 0.5mm; the first 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 left and right columns of misaligned scales, the misalignment value of the two columns of misaligned scales is 0.5mm, and the minimum grid value of the misaligned scales is 1mm;

[0016] The measuring rod is composed of three parts: a coaxial second contact section, a second threaded section and a second scale section. The second contact section is a hemispherical symmetrical structure, used to contact the left end face of the steel pipe; the second threaded section is a cylindrical symmetrical structure with a thread on the side, used to screw into the second screw hole of the second bracket, and the pitch value of the thread is 0.5mm; the second 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 consists 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.

[0017] In some embodiments, the rotating shaft is composed of a coaxial first bearing segment, a sixth body, a second bearing segment, a locking segment and a third threaded segment. The first bearing segment, the sixth body, the second bearing segment and the third threaded segment are all cylindrical symmetrical structures. The diameters of the first bearing segment and the second bearing segment are equal, and both are smaller than the diameter of the sixth body, but not smaller than the diameter of the circumscribed circle of the locking segment; the locking segment is a regular octagonal symmetrical structure, which is used to penetrate the second through hole of the second bracket or the third through hole of the fourth bracket, and the diameter of the inscribed circle of the locking segment is not smaller than the diameter of the third threaded segment; the outer surface of the third threaded segment is provided with threads, which is used to screw into the third screw hole of the third bracket.

[0018] In some embodiments, the screw and the rolling bearing are both standard parts.

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

[0020] 1) The device of the utility model includes four first brackets, one second bracket, one third bracket, one fourth bracket, two fifth brackets, eight positioning rods, four measuring rods, one rotating shaft, thirty-two screws and two rolling bearings. 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 eight positioning rods and the four measuring rods are all rotated to the zero scale position, the four first brackets are inserted into the left port of the steel pipe, the eight positioning rods are respectively screwed out, and the eight first contact sections are respectively in contact with the inner surface of the steel pipe, ensuring that the screwing-out lengths of the eight positioning rods are equal; the four measuring rods are respectively screwed out, and the four second contact sections are respectively in contact with the left end face of the steel pipe, and △A, △B, △C and △E are read. According to the changing trend of |△B-△E|, the second bracket is rotated in a small angle clockwise or counterclockwise direction, and the end face cutting bevel is found based on the condition that △B=△E; the measured △A and △C at this time are read, the outer diameter D, inner diameter d or wall thickness T of the steel pipe are measured, and the above measured data are substituted into the formula for calculation. Therefore, the operation process of the device of the utility model is relatively simple.

[0022] 3) The device of the utility model is designed with a symmetrical structure. The use of screws can realize the relative setting of the first bracket and the fifth bracket; the combined use of the first bracket and the positioning rod can realize the precise positioning of the steel pipe, and the combined use of the fifth bracket and the rolling bearing can realize the directional rotation of the rotating shaft; the combined use of the third bracket and the fourth bracket can realize the linkage of the second bracket and the shaft rotation, and the combined use of the second bracket and the measuring rod can realize the function of finding the bevel of the pipe end and the function of measuring the bevel amount of the pipe end; the combined use of the eight first scale segments of the eight positioning rods and the eight first bosses of the four first brackets can form eight spiral micrometers, and the combined use of the four second scale segments of the four measuring rods and the four fifth bosses of the second brackets can form four spiral micrometers. Therefore, the use effect of the device of the utility model is relatively good.

[0023] The device for measuring the inclination of the end face of a steel pipe provided by the utility model can accurately and stably locate the inner surface of the steel pipe and quickly find the inclination of the end face of the pipe, thereby effectively measuring the inclination of the end face of the 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 This is a schematic diagram of the main structure of the device for measuring the inclination of the end face of a steel pipe based on an integrated type according to the present invention;

[0025] Figure 2 It is a right side structural schematic diagram of the device for measuring the inclination of the end face of a steel pipe based on the integral type of the utility model;

[0026] Figure 3 It is a left-side structural schematic diagram of the device for measuring the inclination of the end face of a steel pipe based on the integral type of the utility model when positioning the steel pipe;

[0027] Figure 4 It is a schematic cross-sectional structure diagram of the device for measuring the inclination of the end face of a steel pipe based on the integrated type according to the utility model along the MM plane;

[0028] Figure 5 This is a schematic diagram of the main structure of the first bracket of the utility model;

[0029] Figure 6 It is a schematic diagram of the top view of the structure of the first bracket of the utility model;

[0030] Figure 7 This is a schematic diagram of the main structure of the positioning rod of the utility model;

[0031] Figure 8 This is a schematic diagram of the main structure of the measuring rod of the utility model;

[0032] Fig. 9This is a schematic diagram of the main structure of the second bracket of the utility model;

[0033] Fig.10 It is a left-side structural schematic diagram of the second bracket of the utility model;

[0034] Fig.11 This is a schematic diagram of the main structure of the third bracket of the utility model;

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

[0036] Fig.13 It is a right side structural schematic diagram of the third bracket of the utility model;

[0037] Fig.14 This is a schematic diagram of the main structure of the fourth bracket of the utility model;

[0038] Fig.15 It is a left-side structural schematic diagram of the fourth bracket of the utility model;

[0039] Fig.16 It is a right side structural schematic diagram of the fourth bracket of the utility model;

[0040] Fig.17 This is a schematic diagram of the main structure of the fifth bracket of the utility model;

[0041] Fig.18 It is a left-side structural schematic diagram of the fifth bracket of the utility model;

[0042] Fig.19 This is a schematic diagram of the main structure of the rotating shaft of the utility model;

[0043] Fig. 20 It is a left-side structural schematic diagram of the device for measuring the inclination of the end face of a steel pipe based on the integral type of the utility model when it is working;

[0044] Fig.21 It is a plane schematic diagram of the geometric relationship of the device for measuring the inclination of the end face of a steel pipe based on the integral type of the utility model;

[0045] Fig. 22 It is a schematic diagram of the partial front view structure of the device for measuring the inclination of the end face of a steel pipe based on the integrated type of the utility model when it is working;

[0046] Fig.23 It is a schematic diagram of a partial top view of the structure of the device for measuring the inclination of the end face of a steel pipe based on the integrated type of the utility model when it is working;

[0047] Fig.24 It is a schematic diagram of the three-dimensional structure of the standard sawing surface of the device for measuring the cutting inclination of the end face of a steel pipe based on the utility model.

[0048] Explanation of the reference numerals: 1-first bracket; 101-first body; 102-first boss; 103-first through hole; 104-first screw hole; 2-positioning rod; 201-first contact section; 202-first threaded section; 203-first scale section; 3-measuring rod; 301-second contact section; 302-second threaded section; 303-second scale section; 4-second bracket; 401-second body; 402-second boss; 403-third boss; 404-fourth boss; 405-second through hole; 406-fifth boss; 407-second screw hole; 5-third bracket; 501-third Main body; 502-sixth boss; 503-first groove; 504-third screw hole; 6-fourth bracket; 601-fourth main body; 602-seventh boss; 603-second groove; 604-third through hole; 7-fifth bracket; 701-fifth main body; 702-eighth boss; 703-ninth boss; 704-third groove; 705-fourth through hole; 706-fourth screw hole; 8-rotating shaft; 801-first bearing section; 802-sixth main body; 803-second bearing section; 804-locking section; 805-third threaded section; 9-screw; 10-rolling bearing; 11-steel pipe. DETAILED DESCRIPTION

[0049] 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.

[0050] Combination Figures 1 to 4As shown, the utility model provides a device for measuring the inclination of the end face of a steel pipe based on an integral type, which comprises four first brackets 1, a second bracket 4, a third bracket 5, a fourth bracket 6, two fifth brackets 7, eight positioning rods 2, four measuring rods 3, a rotating shaft 8, thirty-two screws 9 and two rolling bearings 10; wherein, two third grooves 704 of the two fifth brackets 7 arranged opposite to each other are provided with two rolling bearings 10, and the first bearing section 801 and the second bearing section 803 of the rotating shaft 8 are provided in the two rolling bearings 10 respectively; the second bracket 4 and the fourth bracket 6 are provided in the positioning section 804 of the rotating shaft 8 respectively, and the second bracket 4 The four fourth bosses 404 on the right side are inserted into the four second grooves 603 of the fourth bracket 6; the third threaded section 805 of the rotating shaft 8 is screwed with the third bracket 5, and the four fourth bosses 404 on the left side of the second bracket 4 are inserted into the first groove 503 of the third bracket 5; the four first bodies 101 of the four first brackets 1 are arranged outside the eight end surfaces of the eight ninth bosses 703 of the two fifth brackets 7, and are connected by the thirty-two screws 9; the eight positioning rods 2 are screwed into the eight first screw holes 104 of the four first brackets 1, and the four measuring rods 3 are screwed into the four second screw holes 407 of the second bracket 4.

[0051] The utility model provides an assembly process of an integral device for measuring the inclination of the end face of a steel pipe.

[0052] like Figures 1 to 19 As shown, firstly, two rolling bearings 10 are installed in the two third grooves 704 of the two fifth brackets 7, and then the two fifth brackets 7 are arranged relative to each other, and then the first bearing segment 801 and the second bearing segment 803 of the rotating shaft 8 are respectively inserted into the two rolling bearings 10, so that the two fifth brackets 7, the two rolling bearings 10 and the rotating shaft 8 can be assembled;

[0053] Then, the four first bodies 101 of the four first brackets 1 are simultaneously arranged outside the eight end surfaces of the eight ninth bosses 703 of the two fifth brackets 7, and the thirty-two first through holes 103 of the four first brackets 1 and the thirty-two fourth screw holes 706 of the two fifth brackets 7 are aligned, and then the thirty-two screws 9 are passed through the thirty-two first through holes 103 and screwed into the thirty-two fourth screw holes 706, so that the four first brackets 1 and the two fifth brackets 7 can be assembled;

[0054] Then, the locking section 804 of the rotating shaft 8 is successively inserted into the third through hole 604 of the fourth bracket 6 and the second through hole 405 of the second bracket 4, and the four fourth bosses 404 of the second bracket 4 on the right side are simultaneously inserted into the four second grooves 603 of the fourth bracket 6, and then the third bracket 5 is screwed outside the third threaded section 805 of the rotating shaft 8. At this time, the four fourth bosses 404 of the second bracket 4 on the left side are simultaneously inserted into the first grooves 503 of the third bracket 5. In this way, the rotating shaft 8, the second bracket 4, the third bracket 5 and the fourth bracket 6 can be assembled;

[0055] Then the eight first threaded sections 202 of the eight positioning rods 2 are screwed into the eight first screw holes 104 of the four first brackets 1 respectively, and finally the four second threaded sections 302 of the four measuring rods 3 are screwed into the four second screw holes 407 of the second brackets 4 respectively. In this way, the whole device is assembled and can be put into use.

[0056] The working principle of the device for measuring the inclination of the end face of a steel pipe provided by the utility model is as follows:

[0057] like Fig. 20 and Fig.21 As shown, for the convenience of description, the two measuring rods 3 arranged at the top and bottom are respectively set as A and C, the two measuring rods 3 arranged at the front and rear are respectively set as E and B, the lengths of the screwing in of A, B, C and E are respectively set as △A, △B, △C and △E, that is, A, B, C and E are screwed in by the lengths of △A, △B, △C and △E respectively, then the four measuring rods 3 are all tangent to the left end face of the steel pipe 11, the four tangent points are respectively set as point A, point B, point C and point E, and point A, point B, point C and point E are all located on the mid-diameter circle of the steel pipe 11, connecting point A and point C to obtain line segment AC, connecting point B and point E to obtain line segment BE;

[0058] Since the cross section of a cylinder after beveling is an ellipse, the cross section of the median diameter circle of the steel pipe 11 after beveling is an ellipse. It is assumed that the steel pipe 11 is placed in a standard position, that is, point A is the starting tangent point, point C is the final tangent point, point B and point E are two mid-tangent points, and △B=△E; line segment BE corresponds to the minor axis of the ellipse, and B and E are used to find the end face bevel of the steel pipe 11; line segment AC corresponds to the major axis of the ellipse, and A and C are used to measure the end face bevel of the steel pipe 11; in order to simplify the calculation, the outer diameter of the steel pipe 11 is set to D, the inner diameter is set to d, the wall thickness is set to T, and the end face bevel of the steel pipe 11 is set to Q, Q=2×|△A-△C| / (D+d) or Q=|△A-△C| / (DT);

[0059] like Fig.24 As shown, based on the three-dimensional structural schematic diagram of the standard sawing surface, the axis of the steel pipe 11 is set as the x-axis, and the standard sawing surface should be a plane parallel to the y-axis and the z-axis. If the standard sawing surface is rotated only along the y-axis or only along the z-axis, a single-axis beveling will be generated, that is, each sawing surface will only generate one bevel; if the standard sawing surface is rotated along the y-axis and the z-axis at the same time, a double-axis beveling will be generated, that is, each sawing surface will generate two bevels. Since this situation almost never occurs, the utility model only involves single-axis beveling, that is, each end face of the steel pipe 11 has only one bevel; in this case, there are a total of three possible situations for the measurement data, which are discussed and explained below:

[0060] (1) If △B=△E, and △A=△C, this situation is the most ideal, indicating that the steel pipe 11 adopts a standard placement position, and also indicating that the end face of the steel pipe 11 does not have a bevel, that is, Q=0;

[0061] (2) If △B=△E, and △A≠△C, this situation is relatively inferior, indicating that the steel pipe 11 adopts a standard placement position, and also indicates that the end face of the steel pipe 11 is cut obliquely, Q=2×|△A-△C| / (D+d) or Q=|△A-△C| / (DT);

[0062] ⑶ If △B≠△E, and △A≠△C, this situation is relatively the worst, indicating that the steel pipe 11 adopts a non-standard placement position, and also indicates that the end face of the steel pipe 11 is cut obliquely; first, it is necessary to find the cut oblique surface of the end face; rotate the second bracket 4 in the clockwise direction by a smaller angle, if the difference of |△B-△E| becomes smaller, it means that the rotation direction is correct, and continue to rotate the second bracket 4 in the clockwise direction by a smaller angle until △B=△E; if the difference of |△B-△E| becomes larger, it means that the rotation direction is wrong, and the second bracket 4 should be rotated in the counterclockwise direction by a smaller angle until △B=△E; this becomes the situation described in ⑵, that is, the steel pipe 11 adopts a standard placement position, Q=2×|△A-△C| / (D+d) or Q=|△A-△C| / (DT);

[0063] like Figure 1As shown, the combined use of the eight first scale segments 203 of the eight positioning rods 2 and the eight first bosses 102 of the four first brackets 1 can form eight screw micrometers, and the measurement accuracy of the eight screw micrometers can reach 0.01mm; reasoning process: since the pitch value of the thread of the positioning rod 2 is 0.5mm, that is, every time the positioning rod 2 rotates one circle, the axial distance moved by the positioning rod 2 in the first screw hole 104 is 0.5mm, and since the side surface of the first boss 102 is evenly marked with fifty grid scales along the circumferential direction, therefore, every time the positioning rod 2 rotates one grid scale, the axial distance moved by the positioning rod 2 in the first screw hole 104 is 0.01mm.

[0064] like Fig. 22 and Fig.23 As shown, the combined use of the four second scale segments 303 of the four measuring rods 3 and the four fifth bosses 406 of the second bracket 4 can form four screw micrometers, and the measurement accuracy of the four screw micrometers can reach 0.01mm; reasoning process: since the pitch value of the thread of the measuring rod 3 is 0.5mm, that is, every time the measuring rod 3 rotates one circle, the axial distance moved by the measuring rod 3 in the second screw hole 407 is 0.5mm, and since the side surface of the fifth boss 406 is evenly marked with fifty grid scales along the circumferential direction, therefore, every time the measuring rod 3 rotates one grid scale, the axial distance moved by the measuring rod 3 in the second screw hole 407 is 0.01mm.

[0065] The use process of the device based on the integral type for measuring the inclination of the end face of a steel pipe provided by the utility model

[0066] Step 1: If Figure 3 and Figure 4 As shown, assuming that the eight positioning rods 2 and the four measuring rods 3 are initially rotated to the zero scale position, firstly, the four first brackets 1 of the device of the utility model are simultaneously inserted into the left port of the steel pipe 11, and then the eight positioning rods 2 are respectively screwed out, and the eight first contact sections 201 of the eight positioning rods 2 are respectively contacted with the inner surface of the steel pipe 11, ensuring that the screwing out lengths of the eight positioning rods 2 are equal, so that the axis of the rotating shaft 8 and the axis of the steel pipe 11 can be ensured to coincide, so as to accurately position the steel pipe 11;

[0067] Step 2: If Figure 3As shown, the four measuring rods 3 are respectively unscrewed, and the four second contact sections 301 of the four measuring rods 3 are respectively contacted with the left end face of the steel pipe 11, and then △A, △B, △C and △E are read, and then the second bracket 4 is rotated at a small angle in the clockwise direction. If the difference of |△B-△E| becomes smaller, the second bracket 4 is continued to be rotated at a small angle in the clockwise direction, and then the measurement is performed until △B=△E; if the difference of |△B-△E| becomes larger, the second bracket 4 should be rotated at a small angle in the counterclockwise direction until △B=△E, so that the bevel of the end face can be found;

[0068] Step 3: If Fig. 22 and Fig.23 As shown, when △B=△E, that is, the steel pipe 11 adopts the standard placement position, and then read the △A and △C measured at this time respectively, and then measure the outer diameter D of the steel pipe 11, the inner diameter d of the steel pipe 11 or the wall thickness T of the steel pipe 11 respectively, and then substitute the above measured data into the formula Q=2×|△A-△C| / (D+d) or Q=|△A-△C| / (DT), the end face cutting inclination Q of the steel pipe 11 can be calculated.

[0069] Supplementary explanation: The device provided by the utility model for measuring the inclination of the end face of a steel pipe based on an integral type is designed with a symmetrical structure. According to the outer diameter specification D and the wall thickness specification T of the steel pipe 11, multiple specifications of the device of the utility model should be designed and manufactured to match it; the zero scale position refers to the position when the initial scale lines of the first scale segment 203 of the positioning rod 2 and the first boss 102 of the first bracket 1 are aligned, and the initial scale lines of the second scale segment 303 of the measuring rod 3 and the fifth boss 406 of the second bracket 4 are aligned; the smaller angle means that after the second bracket 4 is rotated by this angle, the value of (△B-△E) can still change within a monotonic range. It is assumed that △B>△E before the rotation, and the second bracket 4 can still ensure △B>△E after rotating by this angle; since the first contact segment 201 of the positioning rod 2 is a truncated cone-shaped symmetrical structure, this can ensure that the eight positioning rods 2 and the steel pipe 11 maintain stable four-point contact.

[0070] It can be seen from the embodiments that the device for measuring the inclination of the end face of a steel pipe based on an integrated method provided by the utility model can not only accurately and stably locate the inner surface of the steel pipe, but also quickly find the inclination of the pipe end, thereby effectively measuring the inclination of the end face of the steel pipe. The device of the utility model has the characteristics of low manufacturing cost, simple operation and good use effect.

[0071] 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 inclination of the end face of a steel pipe based on an integral method, characterized in that: The device for measuring the inclination of the end face of a steel pipe based on an integrated method comprises: four first brackets (1), a second bracket (4), a third bracket (5), a fourth bracket (6), two fifth brackets (7), eight positioning rods (2), four measuring rods (3), a rotating shaft (8), thirty-two screws (9) and two rolling bearings (10), wherein: The first bracket (1) is composed of a first body (101) and four first bosses (102) connected together. The first body (101) is a symmetrical rectangular parallelepiped structure. The four first bosses (102) are arranged opposite to each other in pairs and are respectively located on the upper and lower end surfaces of the first body (101). The first body (101) is symmetrically provided with two groups of eight cylindrical first through holes (103) in total. The screws (9) are passed through the first through holes (103). The first boss (102) is a symmetrical cylindrical structure. The side surface of the first boss (102) is evenly marked with fifty grid scales along the circumferential direction. A first screw hole (104) is provided at the axial position of the first boss (102). The positioning rod (2) is screwed into the first screw hole (104). The first screw hole (104) also passes through the first body (101). The second bracket (4) is composed of a second body (401), four second bosses (402), four third bosses (403), eight fourth bosses (404) and eight fifth bosses (406), the second body (401), the second bosses (402) and the third bosses (403) are all rectangular parallelepiped symmetrical structures, the fourth bosses (404) and the fifth bosses (406) are all cylindrical symmetrical structures, the four second bosses (402) are respectively located on the upper, lower, front and rear end surfaces of the second body (401), the four third bosses (403) are respectively located on the upper, lower, front and rear end surfaces of the four second bosses (402), and the eight fourth bosses (404) are divided into two groups. , the eight fifth bosses (406) are arranged opposite to each other in pairs and are respectively located on the eight left and right end surfaces of the four third bosses (403); a second through hole (405) in the shape of a regular octagon is provided at the center of the second body (401), and a locking section (804) of the rotating shaft (8) is penetrated in the second through hole (405); fifty grid scales are evenly marked on the side surface of the fifth boss (406) along the circumferential direction; a second screw hole (407) is provided at the axial position of the fifth boss (406), and the measuring rod (3) is screwed into the second screw hole (407), and the second screw hole (407) also penetrates the third boss (403); The third bracket (5) is composed of a coaxial third body (501) and a sixth boss (502), the third body (501) and the sixth boss (502) are both cylindrical symmetrical structures, and the sixth boss (502) is located on the left end surface of the third body (501); the right end surface of the third body (501) is provided with a first cylindrical groove (503), and the first groove (503) is provided with a locking section (804) of the rotating shaft (8) and a fourth boss (404) of the second bracket (4); a third screw hole (504) is provided at the axial position of the sixth boss (502), and the third threaded section (805) of the rotating shaft (8) is screwed into the third screw hole (504), and the third screw hole (504) and the first groove (503) are coaxially connected; The fourth bracket (6) is composed of a fourth body (601) and a seventh boss (602) connected coaxially, the fourth body (601) and the seventh boss (602) are both cylindrical symmetrical structures, and the seventh boss (602) is located on the right end surface of the fourth body (601); the left end surface of the fourth body (601) is evenly provided with four cylindrical second grooves (603) along the circumferential direction, and the fourth boss (404) of the second bracket (4) is penetrated in the second groove (603); a third through hole (604) in the shape of a regular octagon is provided at the axial position of the seventh boss (602), and the locking section (804) of the rotating shaft (8) is penetrated in the third through hole (604), and the third through hole (604) also runs through the fourth body (601); The fifth bracket (7) is composed of a fifth body (701), four eighth bosses (702) and four ninth bosses (703) connected together. The fifth body (701), the eighth boss (702) and the ninth boss (703) are all rectangular parallelepiped symmetrical structures. The four eighth bosses (702) are respectively located on the upper, lower, front and rear end surfaces of the fifth body (701), and the four ninth bosses (703) are respectively located on the upper, lower, front and rear end surfaces of the four eighth bosses (702); the fifth body ( A cylindrical third groove (704) is provided on the left end surface of the first boss (701), and the rolling bearing (10) is inserted into the third groove (704); a cylindrical fourth through hole (705) is provided at the axial position of the third groove (704), and the first bearing section (801) or the second bearing section (803) of the rotating shaft (8) is inserted into the fourth through hole (705); four fourth screw holes (706) are symmetrically provided on the ninth boss (703), and the screws (9) are screwed into the fourth screw holes (706); The positioning rod (2) is composed of three parts connected by a coaxial first contact section (201), a first thread section (202) and a first scale section (203). The first contact section (201) is a truncated cone-shaped symmetrical structure, used to contact the inner surface of the steel pipe; the first thread section (202) is a cylindrical symmetrical structure with a thread on the side, used to screw into the first screw hole (104) of the first bracket (1), and the pitch value of the thread is 0.5mm; the first scale section (203) 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 left and right columns of offset scales, the offset value of the two columns of offset scales is 0.5mm, and the minimum grid value of the offset scale is 1mm; The measuring rod (3) is composed of three parts connected by a coaxial second contact section (301), a second threaded section (302) and a second scale section (303). The second contact section (301) is a hemispherical symmetrical structure, used to contact the left end face of the steel pipe; the second threaded section (302) is a cylindrical symmetrical structure with a thread on the side, used to screw into the second screw hole (407) of the second bracket (4), and the pitch value of the thread is 0.5mm; the second scale section (303) 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 consists of two adjacent upper and lower rows of offset scales, the offset value of the two rows of offset scales is 0.5mm, and the minimum grid value of the offset scale is 1mm.

2. The device for measuring the inclination of the end face of a steel pipe based on an integrated method according to claim 1 is characterized in that: The rotating shaft (8) is composed of a coaxial first bearing section (801), a sixth body (802), a second bearing section (803), a locking section (804) and a third threaded section (805); the first bearing section (801), the sixth body (802), the second bearing section (803) and the third threaded section (805) are all cylindrical symmetrical structures; the diameters of the first bearing section (801) and the second bearing section (803) are equal and smaller than the diameter of the sixth body (80 2), but not less than the diameter of the circumscribed circle of the locking section (804); the locking section (804) is a symmetrical structure in the shape of a regular octagon, and is used to penetrate the second through hole (405) of the second bracket (4) or the third through hole (604) of the fourth bracket (6); the diameter of the inscribed circle of the locking section (804) is not less than the diameter of the third threaded section (805); the outer surface of the third threaded section (805) is provided with threads, and is used to screw into the third screw hole (504) of the third bracket (5).

3. The device for measuring the inclination of the end face of a steel pipe based on an integrated method according to claim 1, characterized in that: The screw (9) and the rolling bearing (10) are both standard parts.

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