A tee-shaped position gauge size measuring device and measuring method

Abstract

The application provides a tee-shaped position ruler size measuring device and a measuring method. First, second, third, fourth and fifth grating ruler measuring devices are installed on a measuring platform, and first, second, third, fourth and M-value vertical measuring claws are correspondingly and slidingly installed on the first, second, third, fourth and fifth grating ruler measuring devices. Two ends of a first measuring positioning auxiliary connecting rod are correspondingly and rotationally connected with one end of the first horizontal distance measuring claw and one end of the second horizontal distance measuring claw, and two ends of a second measuring positioning auxiliary connecting rod are correspondingly and rotationally connected with one end of the third horizontal distance measuring claw and one end of the fourth horizontal distance measuring claw.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipe materials and manufacturing technology, in particular to a tee shape and position size measuring device and a measuring method. BACKGROUND

[0002] The tee is an important pipe element for changing the conveying direction of long-distance oil and gas pipelines. Currently, the common tee forming methods in the oil and gas conveying field are hot pressing and cold extrusion. The blank is placed in a mold, and the blank is deformed by using an external press or an internal hydraulic method, so as to fit the mold to form a tee prototype. Then, the pipe end is shaped to achieve the target size. Since the deformation amount after pressing in the forming process is not controlled, and the tee slightly deforms during the subsequent heat treatment process, the final forming size of the tee deviates from the expected size, and the deviation amount is uncertain. In order to reduce the difficulty of assembling the tee and the straight pipe on the construction site and improve the assembly accuracy, it is necessary to measure the pipe opening size and overall shape and position deviation of the tee piece by piece before leaving the factory.

[0003] At present, the tee shape and position sizes specified in the domestic and foreign pipe product standards are: center to end face size (C, M) and angular deviation Q. The standard only gives a schematic diagram of the shape and position size, and there is no unified requirement for the measurement method of the shape and position size. Production enterprises usually use a convenient operation method for approximate measurement. The commonly used measurement method is as follows: the tee branch pipe opening is placed downward on a horizontal platform, the height of the main pipe opening is measured by using a right-angle ruler, the tee height M value is indirectly measured, the distance between the two main pipe ends is directly measured by using a steel tape, so as to obtain the tee half length C value, the right-angle ruler is closely attached to the main pipe end of the tee, and the distance between the ruler and the pipe end is measured to obtain the angular deviation Q1 and Q2 values (two pipe ends).

[0004] When the tee production quantity is large, the measurement efficiency of the above method cannot meet the actual demand. The manual measurement method by using a tape measure cannot guarantee the horizontal or vertical relationship of the measurement reference line, the measurement result has a large deviation, and when the tee tonnage is large, the repeated lifting and adjusting operation is extremely inconvenient. A professional measuring device is urgently needed to automatically measure the tee center to end face size (C, M) and angular deviation Q and other shape and position sizes, improve the size inspection efficiency, and avoid the measurement error of manual measurement. SUMMARY

[0005] The present application solves the technical problems of the prior art, and provides a tee shape and position size measuring device and a measuring method.

[0006] The technical scheme for solving the above technical problems is as follows: a tee shape position size measuring device, comprising: a measuring platform, a first grating ruler measuring device, a second grating ruler measuring device, a third grating ruler measuring device, a fourth grating ruler measuring device, a fifth grating ruler measuring device, a first horizontal distance measuring claw, a second horizontal distance measuring claw, a third horizontal distance measuring claw, a fourth horizontal distance measuring claw, an M value vertical measuring claw, a first measuring positioning auxiliary connecting rod, and a second measuring positioning auxiliary connecting rod, wherein the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device, and the fifth grating ruler measuring device are all installed on the measuring platform, the first horizontal distance measuring claw, the second horizontal distance measuring claw, the third horizontal distance measuring claw, the fourth horizontal distance measuring claw, and the M value vertical measuring claw are one-to-one correspondingly slidably installed on the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device, and the fifth grating ruler measuring device, and the two ends of the first measuring positioning auxiliary connecting rod are one-to-one correspondingly rotationally connected with one end of the first horizontal distance measuring claw and one end of the second horizontal distance measuring claw, and the two ends of the second measuring positioning auxiliary connecting rod are one-to-one correspondingly rotationally connected with one end of the third horizontal distance measuring claw and one end of the fourth horizontal distance measuring claw.

[0007] The beneficial effects of the technical scheme are as follows: according to the measurement characteristics of the tee shape position size, the movable measuring claw is arranged on the measuring platform, the measuring claw moves along the measurement path until it is attached to the tee to be measured, the movement distance of the measuring claw is read, the tee center to end face size (C, M) and angular offset Q and other position sizes are converted, the measurement of the tee shape position size is realized, the size inspection efficiency is improved, the manual measurement error is avoided, and the tee shape position size is suitable for large batch inspection. The measuring positioning auxiliary connecting rod connected with the measuring claw is used to measure the distance and the included angle of the two end faces of the tee, so that the tee main pipe placement angle can be not affected, and when the two measuring positioning auxiliary connecting rods are attached to the end faces of the tee main pipe, the distance and the included angle of the tee end faces can be obtained by calculating the included angle and the distance of the two measuring positioning auxiliary connecting rods.

[0008] Further, the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, and the fourth grating ruler measuring device are all installed on the top of the measuring platform through vertical direction fixed columns, the fifth grating ruler measuring device is installed on the bottom of the measuring platform, the measuring platform is a quadrilateral structure, and the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, and the fourth grating ruler measuring device are one-to-one correspondingly located at the four corner positions of the measuring platform.

[0009] The beneficial effects of the further technical solutions are that the vertical direction fixed column is convenient for installation and maintenance of the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device and the fourth grating ruler measuring device. The positions of the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device and the fifth grating ruler measuring device are designed, so that the three-way shape size can be measured.

[0010] Further, the first horizontal distance measuring claw, the second horizontal distance measuring claw, the third horizontal distance measuring claw, the fourth horizontal distance measuring claw and the M value vertical measuring claw are all embedded with grating rulers; and the M value vertical measuring claw is in an L-shaped structure.

[0011] The beneficial effects of the further technical solutions are that the grating rulers and the measuring claws are arranged on the traditional measuring platform, the measuring claw is moved to be attached to the surface of the measured three-way, and then the relative movement distance of the measuring claw is read by the grating ruler connected to the measuring claw, so that the shape and position size values of the three-way are further converted. The M value vertical measuring claw is in an L-shaped structure, so that the M value vertical measuring claw is attached to the shoulder of the three-way.

[0012] Further, the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device and the fifth grating ruler measuring device are all installed with driving motors; and the driving motors of the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device and the fifth grating ruler measuring device are all connected with control devices.

[0013] The beneficial effects of the further technical solutions are that the driving motor is convenient for automatically pushing the measuring claw, so as to improve the automation. The control device is convenient for automatically controlling the opening and closing of the driving motor.

[0014] Further, the middle part of the measuring platform is provided with a placement area for placing the measured three-way, and the placement area is located on the movement tracks of the first measurement positioning auxiliary connecting rod, the second measurement positioning auxiliary connecting rod and the M value vertical measuring claw; the two ends of the first measurement positioning auxiliary connecting rod are respectively connected with one end of the first horizontal distance measuring claw and one end of the second horizontal distance measuring claw through hinges, and the two ends of the second measurement positioning auxiliary connecting rod are respectively connected with one end of the third horizontal distance measuring claw and one end of the fourth horizontal distance measuring claw through hinges.

[0015] The beneficial effects of the further technical scheme are that the placement area is located on the moving track of the first measurement positioning auxiliary connecting rod, the second measurement positioning auxiliary connecting rod and the M-value vertical measurement claw, which facilitates the first measurement positioning auxiliary connecting rod and the second measurement positioning auxiliary connecting rod to be attached to the end face of the tee joint, and facilitates the M-value vertical measurement claw to be attached to the shoulder of the tee joint. The measurement positioning auxiliary connecting rod is connected to the measurement claw through a hinge, which facilitates the measurement positioning auxiliary connecting rod to be adapted to abut against the tee joint, and improves the data accuracy.

[0016] Further, the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device and the fifth grating ruler measuring device are all connected with a data processing device.

[0017] The beneficial effects of the further technical scheme are that according to the measurement characteristics of the shape and position dimensions of the tee joint, the movable measurement claw is arranged on the measurement platform, and after the measurement device is started, the measurement claw moves along the measurement path until it is attached to the tee joint to be measured, the movement distance of the measurement claw is read by the grating ruler, and the shape and position dimensions such as the center-to-end face dimension (C, M) and the angular offset Q of the tee joint are calculated by using the data processing device, so that the automatic measurement of the shape and position dimensions of the tee joint is realized, the size inspection efficiency is improved, and the manual measurement error is avoided.

[0018] In addition, the present application also provides a tee joint shape and position dimension measurement method based on any one of the above-mentioned tee joint shape and position dimension measurement devices, which comprises the following steps: S1, placing the tee joint to be measured on the measurement platform; S2, moving the first measurement positioning auxiliary connecting rod and the second measurement positioning auxiliary connecting rod in the direction of the tee joint to be measured by the first horizontal distance measurement claw and the second horizontal distance measurement claw and the third horizontal distance measurement claw and the fourth horizontal distance measurement claw respectively until the first measurement positioning auxiliary connecting rod and the second measurement positioning auxiliary connecting rod are attached to the tee joint to be measured; S3, measuring the initial distance and the movement distance of the first horizontal distance measurement claw, the second horizontal distance measurement claw, the third horizontal distance measurement claw and the fourth horizontal distance measurement claw by the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device and the fourth grating ruler measuring device respectively; S4, calculating the tee joint half length and the tee joint angular offset of the tee joint to be measured according to the initial distance and the movement distance of the first horizontal distance measurement claw, the second horizontal distance measurement claw, the third horizontal distance measurement claw and the fourth horizontal distance measurement claw; S5, adjusting the initial position of the M-value vertical measurement claw to be the same as the contrast height of the measurement platform; S6, moving the M-value vertical measurement claw in the direction of the tee joint to be measured until the M-value vertical measurement claw is attached to the shoulder of the tee joint to be measured; S7, measuring the movement distance of the M-value vertical measurement claw by the fifth grating ruler measuring device; and S8, calculating the tee joint height of the tee joint to be measured according to the movement distance of the M-value vertical measurement claw.

[0019] The beneficial effects of the technical scheme of the present application are as follows: according to the measurement characteristics of the three-way shape size, the movable measurement claw is arranged on the measurement platform, the measurement claw moves along the measurement path until it is attached to the measured three-way, the moving distance of the measurement claw is read, and the shape size such as the center-to-end surface size (C, M) and the angular offset Q of the three-way is converted to realize the measurement of the three-way shape size, improve the size inspection efficiency, avoid the manual measurement error, and be suitable for the mass inspection of the three-way shape size. The measurement positioning auxiliary connecting rod connected with the measurement claw is used to measure the distance and the included angle of the two end surfaces of the three-way, so that the three-way main pipe placement angle can be not affected, and when the two measurement positioning auxiliary connecting rods are attached to the end surfaces of the three-way main pipe, the distance and the included angle of the three-way end surfaces can be obtained by calculating the included angle and the distance of the two measurement positioning auxiliary connecting rods.

[0020] Further, the step S1 comprises: placing the three-way branch pipe opening of the measured three-way downward on the measurement platform and placing the three-way branch pipe opening of the measured three-way horizontally on the measurement platform; the step S2 comprises: S21, driving the first horizontal distance measurement claw, the second horizontal distance measurement claw, the third horizontal distance measurement claw and the fourth horizontal distance measurement claw to move towards the measured three-way by the driving motors of the first grating ruler measurement device, the second grating ruler measurement device, the third grating ruler measurement device and the fourth grating ruler measurement device respectively; S22, driving the first measurement positioning auxiliary connecting rod and the second measurement positioning auxiliary connecting rod to move towards the measured three-way by the first horizontal distance measurement claw and the second horizontal distance measurement claw and the third horizontal distance measurement claw and the fourth horizontal distance measurement claw respectively; S23, until the first measurement positioning auxiliary connecting rod and the second measurement positioning auxiliary connecting rod are attached to the measured three-way; S24, the driving motors of the first grating ruler measurement device, the second grating ruler measurement device, the third grating ruler measurement device and the fourth grating ruler measurement device stop driving according to the resistance feedback; the step S6 comprises: S61, driving the M value vertical measurement claw to move towards the measured three-way by the driving motor of the fifth grating ruler measurement device; S62, until the M value vertical measurement claw is attached to the three-way shoulder of the measured three-way; S63, the driving motor of the fifth grating ruler measurement device stops driving according to the resistance feedback; after the step S4 and before the step S5, the first horizontal distance measurement claw, the second horizontal distance measurement claw, the third horizontal distance measurement claw and the fourth horizontal distance measurement claw are driven to reset to the initial position by the driving motors of the first grating ruler measurement device, the second grating ruler measurement device, the third grating ruler measurement device and the fourth grating ruler measurement device respectively; after the step S8, the M value vertical measurement claw is driven to reset to the initial position by the driving motor of the fifth grating ruler measurement device.

[0021] The beneficial effects of adopting the above-mentioned further technical solution are: by placing the tee branch outlet in a horizontal direction, the angular offset value in the other direction can be measured. The inclusion of a drive motor facilitates automatic pushing of the measuring claw, improving automation. Driving the measuring claw back to its initial position via the drive motor facilitates rapid subsequent tee inspection.

[0022] Further, in step S4, the half-length of the tee to be tested is calculated using the following formula: C = (D L -D1-D2) / 2×sin{arctan[D H / (|D4-D2|)]}, where C is the half-length of the tee, D L The initial longitudinal distance of the measuring claw is D1, the first horizontal distance is the distance the measuring claw moves, and D2 is the distance the measuring claw moves in the second horizontal distance. H The initial lateral distance of the measuring jaws is D4, which is the fourth horizontal distance the measuring jaws have moved. The tee angle offset of the tee to be measured is calculated using the following formula: Q = 2R × tan|arctan[D H / (|D4-D2|)]-arctan[D H / (|D1-D3|)]|, where Q is the tee angle offset, 2R is the tee outer diameter, and D H D4 is the initial lateral distance of the measuring claw, D2 is the moving distance of the fourth horizontal distance measuring claw, D1 is the moving distance of the first horizontal distance measuring claw, and D3 is the moving distance of the third horizontal distance measuring claw.

[0023] The beneficial effects of adopting the above-mentioned further technical solutions are: by designing calculation formulas, it is easier to calculate and measure the dimensions of the tee, reducing the difficulty of calculation and improving the accuracy of measurement results.

[0024] Further, in step S8, the height of the tee to be tested is calculated using the following formula: M = R + h, where M is the height of the tee, R is the radius of the tee, and h is the distance the measuring claw moves perpendicular to the value of M.

[0025] The beneficial effects of adopting the above-mentioned further technical solutions are: by designing calculation formulas, it is easier to calculate and measure the dimensions of the tee, reducing the difficulty of calculation and improving the accuracy of measurement results.

[0026] The advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] Fig. 1 This is a top view of the three-way form and position dimension measuring device provided in an embodiment of the present invention.

[0028] Fig. 2 A front view of the three-way shape position size measuring device provided by the embodiment of the present application.

[0029] Fig. 3 A side view of the three-way shape position size measuring device provided by the embodiment of the present application.

[0030] Fig. 4 A three-way half-length and three-way angle offset measuring process parameter marking schematic diagram provided by the embodiment of the present application.

[0031] Fig. 5 A three-way height measuring process parameter marking schematic diagram provided by the embodiment of the present application.

[0032] Fig. 6 A schematic flow chart of the three-way shape position size measuring method provided by the embodiment of the present application.

[0033] BRIEF DESCRIPTION OF DRAWINGS 1. First grating ruler measuring device; 2. Second grating ruler measuring device; 3. Third grating ruler measuring device; 4. Fourth grating ruler measuring device; 5. Fifth grating ruler measuring device; 6. First horizontal distance measuring claw; 7. Second horizontal distance measuring claw; 8. Third horizontal distance measuring claw; 9. Fourth horizontal distance measuring claw; 10. M value vertical measuring claw; 11. First measurement positioning auxiliary connecting rod; 12. Second measurement positioning auxiliary connecting rod; 13. Three-way to be measured; 14. Measurement platform. DETAILED DESCRIPTION

[0034] The principles and features of the present application are described below in conjunction with the accompanying drawings, and the examples are only used to explain the present application and not to limit the scope of the present application.

[0035] As Figs. 1-5As shown, the embodiment of the present application provides a tee shape location size measuring device, which comprises a measuring platform 14, a first grating ruler measuring device 1, a second grating ruler measuring device 2, a third grating ruler measuring device 3, a fourth grating ruler measuring device 4, a fifth grating ruler measuring device 5, a first horizontal distance measuring claw 6, a second horizontal distance measuring claw 7, a third horizontal distance measuring claw 8, a fourth horizontal distance measuring claw 9, an M value vertical measuring claw 10, a first measuring positioning auxiliary connecting rod 11, and a second measuring positioning auxiliary connecting rod 12. The first grating ruler measuring device 1, the second grating ruler measuring device 2, the third grating ruler measuring device 3, the fourth grating ruler measuring device 4, and the fifth grating ruler measuring device 5 are all installed on the measuring platform 14. The first horizontal distance measuring claw 6, the second horizontal distance measuring claw 7, the third horizontal distance measuring claw 8, the fourth horizontal distance measuring claw 9, and the M value vertical measuring claw 10 are correspondingly and slidingly installed on the first grating ruler measuring device 1, the second grating ruler measuring device 2, the third grating ruler measuring device 3, the fourth grating ruler measuring device 4, and the fifth grating ruler measuring device 5. The two ends of the first measuring positioning auxiliary connecting rod 11 are correspondingly and rotationally connected with one end of the first horizontal distance measuring claw 6 and one end of the second horizontal distance measuring claw 7. The two ends of the second measuring positioning auxiliary connecting rod 12 are correspondingly and rotationally connected with one end of the third horizontal distance measuring claw 8 and one end of the fourth horizontal distance measuring claw 9.

[0036] The beneficial effects of the technical scheme of the present application are as follows: according to the measurement characteristics of the tee shape location size, the movable measuring claw is arranged on the measuring platform, the measuring claw moves along the measuring path until it is attached to the tee to be measured, the moving distance of the measuring claw is read, and the center-to-end size (C, M) and the angular offset Q of the tee shape location size are calculated, so that the measurement of the tee shape location size is realized, the size inspection efficiency is improved, the manual measurement error is avoided, and the present application is suitable for large-batch inspection of the tee shape location size. The measuring positioning auxiliary connecting rod connected with the measuring claw is used to measure the distance and the included angle of the two end faces of the tee, so that the present application is not affected by the placement angle of the tee main pipe. When the two measuring positioning auxiliary connecting rods are attached to the end faces of the tee main pipe, the distance and the included angle of the end faces of the tee can be obtained by calculating the included angle and the distance of the two measuring positioning auxiliary connecting rods.

[0037] The grating ruler displacement sensor technology lays the foundation for the automatic measurement of three-way shape and position size. The measurement principle of the grating ruler is based on the interference phenomenon of the grating and the read head. When the object moves, the phase of the reflected laser received by the read head will change, thereby causing the movement of the interference fringes. By counting and calculating the interference fringes, the position and movement distance of the object can be determined. At present, the grating ruler is widely used in the displacement automatic measurement of high-end machine tools. The grating ruler has the advantages of high measurement accuracy (micron level) and fast response speed (millisecond level), and can be applied to the automatic and rapid measurement of three-way shape and position size.

[0038] In the traditional measurement platform, the grating ruler and the measuring claw are arranged. The measuring claw is moved to adhere to the surface of the three-way to be measured, and then the relative movement distance of the measuring claw is read by the grating ruler connected to the measuring claw, and the shape and position size values of the three-way are further converted.

[0039] The three-way shape and position size measuring device provided by the embodiment of the application can include: five groups of vertical fixed columns and grating ruler measuring devices (including driving motors); four horizontal distance measuring claws (embedded grating rulers) C1 (first horizontal distance measuring claw 6), C2 (second horizontal distance measuring claw 7), C3 (third horizontal distance measuring claw 8), and C4 (fourth horizontal distance measuring claw 9); M-value vertical measuring claw (embedded grating ruler) M1; measuring and positioning auxiliary connecting rods CA (first measuring and positioning auxiliary connecting rod 11) and CB (second measuring and positioning auxiliary connecting rod 12); three-way to be measured 13; measurement platform 14; and data processing device (computer).

[0040] As shown in Figs. 1-5 Further, the first grating ruler measuring device 1, the second grating ruler measuring device 2, the third grating ruler measuring device 3, and the fourth grating ruler measuring device 4 are all installed on the top of the measurement platform 14 through vertical fixed columns, and the fifth grating ruler measuring device 5 is installed on the bottom of the measurement platform 14. The measurement platform 14 has a quadrilateral structure, and the first grating ruler measuring device 1, the second grating ruler measuring device 2, the third grating ruler measuring device 3, and the fourth grating ruler measuring device 4 are located at the four corner positions of the measurement platform 14 one by one.

[0041] The beneficial effects of the above-mentioned further technical solutions are: the vertical fixed columns are provided to facilitate the installation and maintenance of the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, and the fourth grating ruler measuring device. The positions of the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device, and the fifth grating ruler measuring device are designed to facilitate the measurement of the three-way shape and position size.

[0042] As shown in Figs. 1-5As shown, further, the first horizontal distance measuring claw 6, the second horizontal distance measuring claw 7, the third horizontal distance measuring claw 8, the fourth horizontal distance measuring claw 9 and the M value vertical measuring claw 10 are all embedded with grating rulers; the M value vertical measuring claw 10 is an L-shaped structure.

[0043] The beneficial effect of the above further technical solution is that the grating ruler and the measuring claw are arranged on the traditional measuring platform, the measuring claw is moved to fit the surface of the three-way pipe to be measured, and then the relative movement distance of the measuring claw is read by the grating ruler connected to the measuring claw, and the shape and size values of the three-way pipe are further converted. The M value vertical measuring claw is an L-shaped structure, which facilitates the fitting of the M value vertical measuring claw with the shoulder of the three-way pipe.

[0044] The M value vertical measuring claw comprises a first rod body and a second rod body, the included angle between the first rod body and the second rod body is 90°, the first rod body is perpendicular to the second rod body, and one end of the first rod body is connected to one end of the second rod body.

[0045] As shown in the figure, Figs. 1-5 Further, the first grating ruler measuring device 1, the second grating ruler measuring device 2, the third grating ruler measuring device 3, the fourth grating ruler measuring device 4 and the fifth grating ruler measuring device 5 are all installed with driving motors; the driving motors of the first grating ruler measuring device 1, the second grating ruler measuring device 2, the third grating ruler measuring device 3, the fourth grating ruler measuring device 4 and the fifth grating ruler measuring device 5 are all connected with control devices.

[0046] The beneficial effect of the above further technical solution is that the driving motor is provided to facilitate automatic pushing of the measuring claw by the driving motor, thereby improving automation. The control device is provided to facilitate automatic control of the opening and closing of the driving motor.

[0047] As shown in the figure, Figs. 1-5 Further, the middle part of the measuring platform 14 is provided with a placement area for placing the three-way pipe 13 to be measured, and the placement area is located on the movement track of the first measurement positioning auxiliary connecting rod 11, the second measurement positioning auxiliary connecting rod 12 and the M value vertical measuring claw 10; the two ends of the first measurement positioning auxiliary connecting rod 11 are respectively connected with one end of the first horizontal distance measuring claw 6 and one end of the second horizontal distance measuring claw 7 through hinges, and the two ends of the second measurement positioning auxiliary connecting rod 12 are respectively connected with one end of the third horizontal distance measuring claw 8 and one end of the fourth horizontal distance measuring claw 9 through hinges.

[0048] The beneficial effect of the further technical scheme is that the placement area is located on the moving track of the first measurement positioning auxiliary connecting rod, the second measurement positioning auxiliary connecting rod and the M value vertical measurement claw, which facilitates the first measurement positioning auxiliary connecting rod and the second measurement positioning auxiliary connecting rod to be attached to the end face of the tee joint, and facilitates the M value vertical measurement claw to be attached to the shoulder of the tee joint. The measurement positioning auxiliary connecting rod is connected with the measurement claw through a hinge, which facilitates the measurement positioning auxiliary connecting rod to be adapted to abut against the tee joint, and improves the data accuracy.

[0049] As shown in Figs. 1-5 Further, the first grating ruler measuring device 1, the second grating ruler measuring device 2, the third grating ruler measuring device 3, the fourth grating ruler measuring device 4 and the fifth grating ruler measuring device 5 are all connected with a data processing device.

[0050] The beneficial effect of the further technical scheme is that according to the measurement characteristics of the tee joint form and position size, the movable measurement claw is arranged on the measurement platform, and after the measurement device is started, the measurement claw moves along the measurement path until it is attached to the tee joint to be measured. The movement distance of the measurement claw is read by the grating ruler, and the form and position size such as the center-to-end face size (C, M) and the angular offset Q of the tee joint is calculated by the data processing device, so that the automatic measurement of the tee joint form and position size is realized, the size inspection efficiency is improved, and the manual measurement error is avoided.

[0051] According to the measurement characteristics of the tee joint form and position size, the movable measurement claw is arranged on the measurement platform, and after the measurement device (tee joint form and position size measuring device) is started, the measurement claw moves along the measurement path until it is attached to the tee joint to be measured. The movement distance of the measurement claw is read by the grating ruler, and the form and position size such as the center-to-end face size (C, M) and the angular offset Q of the tee joint is calculated by the computer software (data processing device), so that the automatic measurement of the tee joint form and position size is realized, the size inspection efficiency is improved, and the manual measurement error is avoided.

[0052] A as Figs. 1-3 The device (tee joint form and position size measuring device) provided by the embodiment of the application comprises the following measuring devices:

[0053] 1) measurement platform (horizontal);

[0054] 2) measurement claw movement track and base, the measurement claw can move along the track under the driving of a motor (driving motor); wherein the track and the base can be installed on a grating ruler measuring device, the driving motor is connected with the measurement claw, the measurement claw is slidingly installed on the track, and the track is installed on the base;

[0055] 3) control device: measurement claw movement control program, positioning and identification device;

[0056] 4) Measurement claws: three-way half-length and angle offset measurement claws (C1, C2), (C3, C4), C1 (first horizontal distance measurement claw 6) and C2 (second horizontal distance measurement claw 7) are connected by a hinged connecting rod CA (first measurement positioning auxiliary connecting rod 11), C3 (third horizontal distance measurement claw 8) and C4 (fourth horizontal distance measurement claw 9) are connected by a hinged connecting rod CB (second measurement positioning auxiliary connecting rod 12); three-way height M value measurement claw M1 (M value vertical measurement claw 10);

[0057] 5) Displacement measurement device: grating connected with measurement claw;

[0058] 6) Data processing device: computer.

[0059] As shown in Fig. 4 and Fig. 5 , the device (three-way shape size measurement device) can automatically measure according to the following scheme:

[0060] B The automatic measurement scheme of the device (three-way shape size measurement device) for three-way half-length C value is as follows:

[0061] 1) Place the three-way branch pipe to be measured with the opening downward on the measurement platform;

[0062] 2) Start the measurement device, and the measurement claws C1 (first horizontal distance measurement claw), C2 (second horizontal distance measurement claw), C3 (third horizontal distance measurement claw), and C4 (fourth horizontal distance measurement claw) are driven forward by the motor (driving motor), and after the measurement claw connecting rods CA (first measurement positioning auxiliary connecting rod 11) and CB (second measurement positioning auxiliary connecting rod 12) are attached to the end face of the three-way, the motor (driving motor) stops advancing according to the resistance feedback;

[0063] 3) The grating connected with the measurement claw measures the movement distance of the measurement claw (C1, C2), (C3, C4);

[0064] 4) Through the computer software (data processing device) combined with the initial distance and movement distance of the two side measurement claws C1 (first horizontal distance measurement claw 6), C2 (second horizontal distance measurement claw 7), C3 (third horizontal distance measurement claw 8), and C4 (fourth horizontal distance measurement claw 9), the final spacing of the measurement claw connecting rods CA (first measurement positioning auxiliary connecting rod 11) and CB (second measurement positioning auxiliary connecting rod 12) after the measurement claw stops moving is calculated, so as to obtain the total length L of the three-way, and the three-way half-length C can be calculated according to the formula three-way half-length C = L / 2;

[0065] 5) Measurement claw reset, the measurement claw is reset to the initial position under the drive of the motor;

[0066] C The automatic measurement scheme of the device for three-way angle offset Q value is as follows:

[0067] 1) The to-be-measured tee branch pipe port is placed downward on the measuring platform;

[0068] 2) The measuring claws C1, C2, C3 and C4 are driven forward by the motor, and the motor stops driving forward according to the resistance feedback after the to-be-measured claw connecting rods CA and CB are in contact with the tee end face;

[0069] 3) The movement distance of the measuring claws C1, C2, C3 and C4 is measured by the grating ruler connected with the measuring claws;

[0070] 4) The relative positions of C1, C2, C3 and C4 after the measuring claws stop moving are calculated by the computer software combined with the initial distance of the two measuring claws, the final included angle of the claw connecting rods CA and CB is calculated, and the angular offset is calculated combined with the tee diameter.

[0071] 5) The measuring claws are reset to the initial position under the driving of the motor;

[0072] D The tee height M value automatic measurement scheme of the device is as follows:

[0073] 1) The initial position of the measuring claw M1 (the M value vertical measuring claw 10) is the same as the height of the horizontal measuring platform (the measuring platform 14);

[0074] 2) The measuring claw M1 is driven forward by the motor, and the motor stops driving forward according to the resistance feedback after the measuring claw M1 is in contact with the tee shoulder;

[0075] 3) The movement distance of the measuring claw M1 is measured by the grating ruler connected with the measuring claw;

[0076] 4) The sum of the movement distance of the measuring claw M1 and the tee radius is the tee height (the tee radius data can be obtained in the independent tee pipe end parameter measurement process);

[0077] 5) The measuring claws are reset to the initial position under the driving of the motor;

[0078] E The fault tolerance principle of the device:

[0079] The device uses the claw connecting rods CA (the first measurement positioning auxiliary connecting rod 11) and CB (the second measurement positioning auxiliary connecting rod 12) connected with the measuring claws to measure the distance and the included angle of the two tee end faces, so that the tee main pipe placement angle can be not affected. When the connecting rods CA and CB are in contact with the tee main pipe end face, the distance and the included angle of the tee end face can be obtained by calculating the included angle and the distance of the connecting rods CA and CB.

[0080] As Fig. 6In addition, the application also provides a three-way shape position size measurement method based on the three-way shape position size measurement device in any one of the above. The three-way shape position size measurement method comprises the following steps: S1, placing a three-way to be measured on a measurement platform; S2, moving first and second horizontal distance measurement claws and third and fourth horizontal distance measurement claws to the direction of the three-way to be measured by the first and second horizontal distance measurement claws and the third and fourth horizontal distance measurement claws, respectively, until the first and second measurement positioning auxiliary connecting rods are attached to the three-way to be measured; S3, measuring the initial distance and the moving distance of the first, second, third and fourth horizontal distance measurement claws by the first, second, third and fourth grating ruler measurement devices, respectively; S4, calculating the three-way half length and the three-way angle offset of the three-way to be measured according to the initial distance and the moving distance of the first, second, third and fourth horizontal distance measurement claws; S5, adjusting the initial position of the M-value vertical measurement claw to be the same as the contrast height of the measurement platform; S6, moving the M-value vertical measurement claw to the direction of the three-way to be measured until the M-value vertical measurement claw is attached to the three-way shoulder of the three-way to be measured; S7, measuring the moving distance of the M-value vertical measurement claw by the fifth grating ruler measurement device; and S8, calculating the three-way height of the three-way to be measured according to the moving distance of the M-value vertical measurement claw.

[0081] The beneficial effects of the technical scheme of the application are as follows: according to the measurement characteristics of the three-way shape position size, the movable measurement claws are arranged on the measurement platform, the measurement claws move along the measurement path until they are attached to the three-way to be measured, the moving distance of the measurement claws is read, the three-way center to end face size (C, M) and the angle offset Q and other shape position sizes are calculated, the measurement of the three-way shape position size is realized, the size inspection efficiency is improved, the manual measurement error is avoided, and the three-way shape position size is suitable for large batch inspection. The measurement positioning auxiliary connecting rods connected with the measurement claws are used to measure the distance and the included angle of the two end faces of the three-way, so that the three-way end face distance and the included angle can be obtained without being affected by the placement angle of the three-way main pipe.

[0082] By arranging a plurality of movable measurement claws on the measurement platform, the measurement claws are driven to move along a fixed direction to tightly adhere to the end face (point) of the three-way to be measured by the motor (driving motor), the moving distance of each measurement claw is obtained by the grating ruler, the relative distance of the measurement claw is calculated in combination with the relative position of the starting point of the measurement claw, and the shape position size data of the three-way is further calculated.

[0083] Further, the step S1 comprises: placing the tee branch pipe opening of the to-be-tested tee downward on the measuring platform and placing the tee branch pipe opening of the to-be-tested tee horizontally on the measuring platform; the step S2 comprises: S21, driving the first, second, third and fourth grating ruler measuring devices to drive the first, second, third and fourth horizontal distance measuring claws to move toward the to-be-tested tee respectively; S22, pushing the first and second measuring positioning auxiliary connecting rods to move toward the to-be-tested tee respectively by the first and second horizontal distance measuring claws and the third and fourth horizontal distance measuring claws; S23, until the first and second measuring positioning auxiliary connecting rods are in contact with the to-be-tested tee; S24, the driving motors of the first, second, third and fourth grating ruler measuring devices stop driving according to the resistance feedback; the step S6 comprises: S61, driving the M-value vertical measuring claw to move toward the to-be-tested tee by the driving motor of the fifth grating ruler measuring device; S62, until the M-value vertical measuring claw is in contact with the tee shoulder of the to-be-tested tee; S63, the driving motor of the fifth grating ruler measuring device stops driving according to the resistance feedback; the step S4 before the step S5 comprises: driving the first, second, third and fourth horizontal distance measuring claws to reset to the initial positions by the driving motors of the first, second, third and fourth grating ruler measuring devices respectively; the step S8 after the step S8 comprises: driving the M-value vertical measuring claw to reset to the initial position by the driving motor of the fifth grating ruler measuring device.

[0084] The beneficial effects of the above further technical solutions are: placing the tee branch pipe opening horizontally can measure the angle offset value in another direction. The driving motor is provided, which facilitates automatic pushing of the measuring claw by the driving motor and improves automation. Driving the measuring claw to reset to the initial position by the driving motor facilitates rapid detection of the tee subsequently.

[0085] Further, in the step S4, the tee half length of the to-be-tested tee is calculated by the following formula: C=(D L -D1-D2) / 2×sin{arctan[D H / (|D4-D2|)]}, wherein C is the tee half length, D L is the initial longitudinal distance of the measuring claw, D1 is the moving distance of the first horizontal distance measuring claw, D2 is the moving distance of the second horizontal distance measuring claw, D HD4 is the fourth horizontal distance measured by the moving distance of the measuring claw; the tee bend angle offset of the tee bend to be measured is calculated by the following formula: Q=2Rxtan|arctan[D H / (|D4-D2|)]-arctan[D H / (|D1-D3|)]|, wherein Q is the tee bend angle offset, 2R is the outer diameter of the tee bend, D H D4 is the fourth horizontal distance measured by the moving distance of the measuring claw, D2 is the second horizontal distance measured by the moving distance of the measuring claw, D1 is the first horizontal distance measured by the moving distance of the measuring claw, and D3 is the third horizontal distance measured by the moving distance of the measuring claw.

[0086] The beneficial effects of the above further technical solutions are that the calculation and measurement of the tee bend form and position size are facilitated, the calculation difficulty is reduced, and the accuracy of the measurement result is improved.

[0087] Further, in step S8, the tee bend height of the tee bend to be measured is calculated by the following formula: M=R+h, wherein M is the tee bend height, R is the tee bend radius, and h is the moving distance of the vertical measuring claw of the M value.

[0088] The beneficial effects of the above further technical solutions are that the calculation and measurement of the tee bend form and position size are facilitated, the calculation difficulty is reduced, and the accuracy of the measurement result is improved.

[0089] Fig. 4 D1 is the moving distance of the first horizontal distance measuring claw 6;

[0090] D2 is the moving distance of the second horizontal distance measuring claw 7;

[0091] D3 is the moving distance of the third horizontal distance measuring claw 8;

[0092] D4 is the moving distance of the first horizontal distance measuring claw 9;

[0093] D L is the initial longitudinal distance between the first grating ruler measuring device 1 and the third grating ruler measuring device 3 and between the second grating ruler measuring device 2 and the fourth grating ruler measuring device 4;

[0094] D H is the initial longitudinal distance between the first grating ruler measuring device 1 and the third grating ruler measuring device 3 and between the second grating ruler measuring device 2 and the fourth grating ruler measuring device 4;

[0095] L is the total length of the tee bend to be measured;

[0096] D is the distance between the first horizontal distance measuring claw 6 and the second horizontal distance measuring claw 7;

[0097] α is the included angle between the fourth horizontal distance measuring claw 9 and the second measuring positioning auxiliary connecting rod 12;

[0098] β is the included angle between the first horizontal distance measuring claw 6 and the first measuring positioning auxiliary connecting rod 11.

[0099] A three-way semi-long C value automatic measurement ( Fig. 4 ):

[0100] Fig. 5 Fig. 6 R is the three-way radius;

[0101] O is the three-way origin;

[0102] M is the three-way height;

[0103] h is the moving distance of the M value vertical measuring claw 10.

[0104] 1) Place the three-way branch pipe to be measured downward on the measuring platform;

[0105] 2) Start the measuring device (three-way form position size measuring device), and the measuring claws C1 (first horizontal distance measuring claw 6), C2 (second horizontal distance measuring claw 7), C3 (third horizontal distance measuring claw 8), and C4 (fourth horizontal distance measuring claw 9) are driven forward along the horizontal rail under the motor, and after the measuring claw connecting rods CA (first measuring positioning auxiliary connecting rod 11) and CB (second measuring positioning auxiliary connecting rod 12) are attached to the three-way end face, the motor stops advancing according to the resistance feedback;

[0106] 3) At this time, the moving distances D1, D2, D3, and D4 of the measuring claws C1, C2, C3, and C4 can be read from the grating ruler;

[0107] 4) The moving distances D1, D2, D3, and D4 of the measuring claws C1, C2, C3, and C4 are transmitted to the data processing equipment (computer), and combined with the initial longitudinal distance D L and the transverse distance D H , the following can be obtained:

[0108] The distance D of the measuring claws C1 and C3 is D L -D1-D2;

[0109] Since there may be an included angle between the three-way placement and the measuring connecting rod, it can be known from geometric analysis that the included angle is equal to the included angle α and β of the measuring claw and the measuring connecting rod, and when the three-way C value is measured, it is approximately considered that the end faces of the two main pipes of the three-way are parallel, and therefore the following can be obtained:

[0110] α=β=arctan[D H / (|D4-D2|)].

[0111] Further use of trigonometric function relationship can get three-way half length C (center to end face distance)

[0112] C = L / 2 = D / 2 x sin a = D / 2 x sin {arctan [D H / (|D4-D2|)]}

[0113] = (D L -D1-D2) / 2 x sin {arctan [D H / (|D4-D2|)]}.

[0114] The above calculation process can be automatically calculated by a computer program, and finally the measurement result of the to-be-measured parameter C is directly output.

[0115] 5) The measuring claw is reset, and the measuring claw is reset to the initial position under the driving of the motor;

[0116] B The automatic measurement scheme of the three-way angle offset Q value of the device is as follows:

[0117] 1) Place the to-be-measured three-way branch pipe opening downward on the measuring platform;

[0118] 2) Start the measuring device, and the measuring claws C1, C2, C3 and C4 are pushed forward under the driving of the motor, and the motor stops advancing according to the resistance feedback after the to-be-measured claw connecting rods CA and CB are in contact with the end face of the three-way pipe;

[0119] 3) At this time, the moving distances D1, D2, D3 and D4 of the measuring claws C1, C2, C3 and C4 can be read from the grating ruler;

[0120] 4) The moving distances D1, D2, D3 and D4 of the measuring claws C1, C2, C3 and C4 are transmitted to the data processing equipment (computer), and combined with the initial longitudinal distance D L , the transverse distance D H of the measuring claw and the outer diameter 2R of the three-way pipe, the following can be obtained:

[0121] a = arctan [D H / (|D4-D2|)].

[0122] b = arctan [D H / (|D1-D3|)].

[0123] Angle offset Q = 2R x tan |a-b|

[0124] = 2R x tan |arctan [D H / (|D4-D2|)] - arctan [D H / (|D1-D3|)]|.

[0125] The above calculation process can be automatically calculated by a computer program, and finally directly output the measurement result of the to-be-measured parameter Q.

[0126] 5) Place the tee branch pipe opening horizontally, or rotate the measurement claw base by 90 degrees, so that the two measurement claws C1 and C2 on the same side are arranged in the vertical direction, and C3 and C4 are arranged in the vertical direction; repeat steps 2-4 to measure the angular deviation value in another direction.

[0127] 6) Reset the measurement claw, and reset the measurement claw to the initial position under the drive of the motor;

[0128] C The automatic measurement scheme of the tee height M value of the device is as follows:

[0129] 1) Place the to-be-measured tee branch pipe opening downward on the measurement platform, and the initial position of the measurement claw M1 (the M value vertical measurement claw 10) is the same as the height of the horizontal measurement platform;

[0130] 2) Start the measurement device, and the measurement claw M1 is driven upward by the motor, and the motor stops advancing according to the resistance feedback after the to-be-measured claw M1 is attached to the tee shoulder;

[0131] 3) The grating ruler connected with the measurement claw measures the movement distance h of the measurement claw M1;

[0132] 4) The sum of the movement distance h of the measurement claw M1 and the tee radius R is the tee height (the tee radius data can be obtained in the independent tee pipe end parameter measurement process);

[0133] M = R + h,

[0134] The above calculation process can be automatically calculated by a computer program, and finally directly output the measurement result of the to-be-measured parameter C;

[0135] 5) Reset the measurement claw, and reset the measurement claw to the initial position under the drive of the motor.

[0136] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A three-way gage dimension measuring device, characterized by, The utility model relates to a kind of measurement platform, first grating ruler measuring device, second grating ruler measuring device, third grating ruler measuring device, fourth grating ruler measuring device, fifth grating ruler measuring device, first horizontal distance measuring claw, second horizontal distance measuring claw, third horizontal distance measuring claw, fourth horizontal distance measuring claw, M value vertical measuring claw, first measurement positioning auxiliary connecting rod, second measurement positioning auxiliary connecting rod, the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device and the fifth grating ruler measuring device are installed on the measurement platform, the first horizontal distance measuring claw, the second horizontal distance measuring claw, the third horizontal distance measuring claw, the fourth horizontal distance measuring claw and the M value vertical measuring claw are slidably installed on the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device and the fifth grating ruler measuring device, the first measurement positioning auxiliary connecting rod both ends are rotatably connected with the first horizontal distance measuring claw one end and the second horizontal distance measuring claw one end, and the second measurement positioning auxiliary connecting rod both ends are rotatably connected with the third horizontal distance measuring claw one end and the fourth horizontal distance measuring claw one end. The first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device and the fourth grating ruler measuring device are installed on the top of the measurement platform through vertical fixed column, the fifth grating ruler measuring device is installed on the bottom of the measurement platform, the measurement platform is quadrilateral structure, and the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device and the fourth grating ruler measuring device are located at the four corner positions of the measurement platform.

2. A three-way angular size measuring device according to claim 1, characterized in that The first horizontal distance measuring claw, the second horizontal distance measuring claw, the third horizontal distance measuring claw, the fourth horizontal distance measuring claw and the M value vertical measuring claw are embedded with grating ruler, and the M value vertical measuring claw is L-shaped structure.

3. A three-way angular size measuring device according to claim 1, characterized in that Driving motor is installed in the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device and the fifth grating ruler measuring device, and the driving motor of the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device and the fifth grating ruler measuring device is connected with control equipment.

4. The three-way angular and dimensional measuring device of claim 1, wherein, ​ 5. A three-way angular size measuring device according to claim 1, characterized in that, The middle part of the measuring platform is provided with a placement area for placing the three-way pipe to be measured, and the placement area is located on the movement track of the first measuring positioning auxiliary connecting rod, the second measuring positioning auxiliary connecting rod and the M-value vertical measuring claw; the two ends of the first measuring positioning auxiliary connecting rod are respectively connected with one end of the first horizontal distance measuring claw and one end of the second horizontal distance measuring claw through hinges, and the two ends of the second measuring positioning auxiliary connecting rod are respectively connected with one end of the third horizontal distance measuring claw and one end of the fourth horizontal distance measuring claw through hinges.

6. A three-way angular size measuring device according to claim 1, characterized in that The first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device, the fourth grating ruler measuring device and the fifth grating ruler measuring device are all connected with data processing devices.

7. A three-way gage dimensioning method, characterized by, The three-way shape position size measuring device and the three-way shape position size measuring method according to any one of the above claims 1 to 6 include: S1, placing the three-way pipe to be measured on the measuring platform; S2, pushing the first measuring positioning auxiliary connecting rod and the second measuring positioning auxiliary connecting rod to move towards the three-way pipe to be measured through the first horizontal distance measuring claw and the second horizontal distance measuring claw and the third horizontal distance measuring claw and the fourth horizontal distance measuring claw respectively, until the first measuring positioning auxiliary connecting rod and the second measuring positioning auxiliary connecting rod are attached to the three-way pipe to be measured; S3, measuring the initial distance and the moving distance of the first horizontal distance measuring claw, the second horizontal distance measuring claw, the third horizontal distance measuring claw and the fourth horizontal distance measuring claw through the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device and the fourth grating ruler measuring device respectively; S4, calculating the three-way half length and the three-way angle offset of the three-way pipe to be measured according to the initial distance and the moving distance of the first horizontal distance measuring claw, the second horizontal distance measuring claw, the third horizontal distance measuring claw and the fourth horizontal distance measuring claw; S5, adjusting the initial position of the M-value vertical measuring claw to be the same as the contrast height of the measuring platform; S6, pushing the M-value vertical measuring claw to move towards the three-way pipe to be measured, until the M-value vertical measuring claw is attached to the three-way shoulder of the three-way pipe to be measured; S7, measuring the moving distance of the M-value vertical measuring claw through the fifth grating ruler measuring device; S8, calculating the three-way height of the three-way pipe to be measured according to the moving distance of the M-value vertical measuring claw.

8. A three-way form dimensioning method according to claim 7, wherein, Step S1 includes placing the three-way branch pipe opening of the three-way pipe to be measured downward on the measuring platform and placing the three-way branch pipe opening of the three-way pipe to be measured horizontally on the measuring platform; Step S2 includes: S21, driving the first horizontal distance measuring claw, the second horizontal distance measuring claw, the third horizontal distance measuring claw and the fourth horizontal distance measuring claw to move towards the three-way pipe to be measured through the driving motors of the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device and the fourth grating ruler measuring device respectively; S22, pushing the first measuring positioning auxiliary connecting rod and the second measuring positioning auxiliary connecting rod to move towards the three-way pipe to be measured through the first horizontal distance measuring claw and the second horizontal distance measuring claw and the third horizontal distance measuring claw and the fourth horizontal distance measuring claw respectively; S23, until the first measurement positioning auxiliary connecting rod and the second measurement positioning auxiliary connecting rod are attached to the three-way pipe to be measured; S24, the driving motor of the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device and the fourth grating ruler measuring device stop driving according to the resistance feedback; Step S6 includes: S61, the driving motor of the fifth grating ruler measuring device pushes the M-value vertical measuring claw to move towards the three-way pipe to be measured; S62, until the M-value vertical measuring claw is attached to the three-way shoulder of the three-way pipe to be measured; S63, the driving motor of the fifth grating ruler measuring device stops driving according to the resistance feedback; Before step S5 after step S4 includes: the driving motor of the first grating ruler measuring device, the second grating ruler measuring device, the third grating ruler measuring device and the fourth grating ruler measuring device respectively drives the first horizontal distance measuring claw, the second horizontal distance measuring claw, the third horizontal distance measuring claw and the fourth horizontal distance measuring claw to reset to the initial position; After step S8 includes: the driving motor of the fifth grating ruler measuring device drives the M-value vertical measuring claw to reset to the initial position.

9. A three-way form dimensioning method according to claim 7, wherein, In step S4, the three-way half length of the three-way pipe to be measured is calculated by the following formula: C = (D L - D1 - D2) / 2 x sin{arctan[D H / (|D4 - D2|)], wherein C is a three-way half length, D L To measure the initial longitudinal distance of the jaws, D1 is the first horizontal distance measured by the movement of the jaws, D2 is the second horizontal distance measured by the movement of the jaws, D H To measure the initial lateral distance of the jaws, D4 is the fourth horizontal distance measured by the movement of the jaws; The three-way angle offset of the three-way pipe to be measured is calculated by the following formula: Q = 2R x tan |arctan [D H / (|D4-D2|)] - arctan [D H / (|D1-D3|)]|, wherein Q is a tee offset, 2R is a tee outside diameter, D H D4 is a fourth horizontal distance measured by the paw, D2 is a second horizontal distance measured by the paw, D1 is a first horizontal distance measured by the paw, and D3 is a third horizontal distance measured by the paw.

10. A three-way form dimension measurement method according to claim 7, wherein, In step S8, the three-way height of the three-way pipe to be measured is calculated by the following formula: M = R + h, Wherein, M is the three-way height, R is the three-way radius, and h is the moving distance of the M-value vertical measuring claw.

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