Engineering pipe performance measuring instrument

Abstract

The invention relates to the technical field of pipe detection, in particular to an engineering pipe performance measuring instrument which comprises a base and a ring stiffness testing machine installed in the middle of the upper end of the base, and the upper end of the base is further provided with a correction unit and a positioning unit located on the left side of the correction unit. When the V-shaped correcting plates abut against the outer side of the pipe, the reciprocating sets are arranged to drive the corresponding V-shaped correcting plates to move left and right in a reciprocating mode, the V-shaped correcting plates correct the position of the pipe to enable the pipe to be arranged in the middle, and then the central axis of the pipe is strictly parallel to a measuring rod of the inner diameter measuring instrument; according to the invention, a plurality of elastic positioning rods are arranged to position a plurality of detection positions of the pipe, and when the elastic positioning rods rotate to the upper limit position and are vertically arranged, the corresponding measurement positions of the pipe rotate to the upper limit position; therefore, each measurement position of the pipe can be accurately aligned with the pressure applying position of the ring stiffness testing machine, and the use quality of the qualified pipe after measurement is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe detection, and specifically to an engineering pipe performance measuring instrument. Background Art

[0002] Engineering pipes are widely used in fields such as municipal drainage, oil and gas transportation, and communication cable protection. As the core mechanical index of the pipe's resistance to radial deformation, the ring stiffness directly affects the stability and service life of the pipe when it bears external pressures such as soil load and ground traffic load after being buried.

[0003] Currently, the ring stiffness of pipes is often measured by a ring stiffness testing machine. During the measurement, the operator first marks multiple measurement positions on the pipe, then places the pipe on the ring stiffness testing machine and installs an inner diameter measuring instrument. The inner diameter measuring instrument continuously measures the inner diameter of the pipe through two measuring rods, and then applies pressure to the pipe through the testing machine to measure the pressure values borne by the inner diameter at different marked positions of the pipe under a certain deformation amount. Finally, the average ring stiffness of the pipe is calculated by integrating the data of multiple measurement points.

[0004] However, the above measurement process has the following problems: 1. When the operator places the pipe on the ring stiffness testing machine, the pipe may be skewed, that is, in a non-centered arrangement state, resulting in an angular deviation in the front-back direction between the measuring rod of the inner diameter measuring instrument and the central axis of the pipe, and then making the measurement of the inner diameter of the pipe by the inner diameter measuring instrument inaccurate, affecting the accuracy of the pipe ring stiffness measurement result; 2. During the measurement, the measurement positions of the pipe cannot be accurately positioned, so it is impossible to ensure that each measurement position of the pipe is precisely aligned with the position where the ring stiffness testing machine applies pressure, resulting in a decrease in the accuracy of the measurement data and requiring manual auxiliary adjustment. When each measurement position needs to be adjusted, the repetition rate of the measurement operation steps will increase, while the efficiency will decrease. Summary of the Invention

[0005] To solve the above technical problems, the present invention adopts the following technical solutions. An engineering pipe performance measuring instrument includes a base and a ring stiffness testing machine installed in the middle of the upper end of the base. A calibration unit and a positioning unit located on the left side of the calibration unit are also installed on the upper end of the base. The calibration unit includes two sliding seats slidably installed on the base before and after through a synchronizing member. The sliding seats are arranged symmetrically before and after. Two mounting plates arranged symmetrically left and right are installed on the upper ends of the sliding seats. A V-shaped calibration plate is installed on the mounting plates through a reciprocating group. A driving group is installed in the middle of the upper end of the sliding seat. The reciprocating group is used to drive the V-shaped calibration plate to reciprocate left and right to calibrate the pipe so that the pipe is centered. After the pipe is centered, the driving group drives the pipe to rotate. The positioning unit includes an adjusting group installed on the base. A fixing ring is installed on the adjusting group. The adjusting group is used to adjust the height of the fixing ring so that it is coaxial with the axis of the pipe. A plurality of circumferentially arranged and position-adjustable elastic positioning rods are installed on the fixing ring through a connecting group. The position of the elastic positioning rods is adjusted to accurately position the measuring position of the pipe. The elastic positioning rods correspond to the measuring positions one by one. The connecting group is used to drive a plurality of elastic positioning rods to abut against the inner wall of the pipe, so that the pipe drives the elastic positioning rods to rotate synchronously. When the upper elastic positioning rod is vertically arranged, its corresponding measuring position is accurately aligned with the pressurizing point of the ring stiffness testing machine.

[0006] Preferably, a square hole is opened on the upper side of the mounting plate. The reciprocating group includes a reciprocating slider slidably installed in the square hole. Both the left and right sides of the reciprocating slider are connected to the inner wall of the square hole through a plurality of connecting springs. An elastic abutting rod is slidably installed before and after at one end of the reciprocating slider close to the middle of the base. The end of the elastic abutting rod far from the middle of the base slidably penetrates through the reciprocating slider before and after. The end of the elastic abutting rod close to the middle of the base is hinged to the corresponding V-shaped calibration plate through a torsion spring shaft.

[0007] Preferably, a mating rod is fixedly installed at the lower part of the end of the elastic abutting rod far from the middle of the base. A mating seat is installed on the upper side of the sliding seat at a position corresponding to the mating rod. A waveform groove is opened on the mating seat, and the mating rod is slidably installed in the corresponding waveform groove.

[0008] Preferably, the driving group includes two symmetrically arranged mounting frames fixedly installed on one side of the upper end of the sliding seat close to the middle of the base. The upper ends of the mounting frames are inclined towards the middle of the base. A driving roller is rotatably installed at the common upper end of the opposite sides of the two mounting frames. The left side of the driving roller is connected to the output shaft of a first motor fixedly installed on the sliding seat.

[0009] Preferably, two mounting holes are symmetrically arranged front and back in the middle of the upper side of the base, and two through holes are arranged left and right and communicate with the two mounting holes. A support group is installed in the middle of the upper side of the base. The support group includes a lifting seat slidably mounted up and down in the mounting hole. A support roller is rotatably mounted at the upper end of the lifting seat. Matching columns are fixedly installed on both the left and right sides of the lifting seat. Lifting plates are fixedly installed on the opposite sides of the two sliding seats at positions corresponding to the matching columns. The lifting plates are arranged in the corresponding through holes. The two lifting plates corresponding to the same through hole are staggered left and right. The ends of the upper sides of the lifting plates away from the corresponding sliding seats are all arranged as inclined surfaces, and the inclined surfaces of the lifting plates are in contact with the corresponding matching columns.

[0010] Preferably, the adjusting group includes two connecting plates fixedly installed on the base and symmetrically arranged front and back. Adjusting plates are slidably mounted up and down on the opposite sides of the two connecting plates. A fixed ring is fixedly installed between the opposite sides of the two adjusting plates. A plurality of jacks are evenly arranged up and down on the opposite sides of the two connecting plates. A locking pin is installed in the jack in a detachable manner. Locking holes for locking the position of the adjusting plate in cooperation with the locking pin are opened on the opposite sides of the two adjusting plates.

[0011] Preferably, the connecting group includes a rotating plate rotatably installed inside the fixed ring. An annular groove is opened on the right side of the rotating plate. A plurality of arc-shaped sliders arranged circumferentially are slidably installed in the annular groove. A square plate is fixedly installed on the right side of the arc-shaped slider. The right side of the square plate is radially slidably connected to its corresponding elastic positioning rod. A plurality of circular holes are evenly arranged circumferentially at positions corresponding to the annular groove on the left side of the rotating plate. A locking insertion rod is installed in the circular hole in a detachable manner. Matching holes are opened on the left sides of the arc-shaped sliders.

[0012] Preferably, the opposite sides of a plurality of elastic positioning rods slidably penetrate through the corresponding square plates and fixedly install two symmetrically arranged pressing columns. The opposite sides of a plurality of square plates are slidably installed with a dialing plate left and right through a connecting block. Two symmetrically arranged pressing plates are fixedly installed on the right side of the dialing plate. The right ends of the pressing plates are arranged as inclined surfaces on one side close to the central axis of the rotating plate, and the inclined surfaces of the pressing plates are in contact with the corresponding pressing columns. A pushing plate is jointly contacted on the left sides of a plurality of pressing plates. An electric push rod is connected between the left side of the pushing plate and the rotating plate.

[0013] Preferably, a positioning group is installed on the opposite sides of a plurality of square plates. The positioning group includes an L-shaped positioning rod slidably mounted left and right on the square plate through a top spring. A positioning hole is opened in the upper part of the right side of the fixed ring. When the horizontal section of the positioning rod is inserted into the positioning hole, its corresponding elastic positioning rod is vertically arranged, and the measuring position corresponding to the elastic positioning rod is located at the upper limit position.

[0014] Preferably, a plurality of evenly arranged rotating rods are rotatably installed on the V-shaped surface of the V-shaped correction plate close to the middle of the base.

[0015] The beneficial effects of the present invention are: 1. When the V-shaped correction plate is pressed against the outside of the pipe, the present invention drives the corresponding V-shaped correction plate to move back and forth left and right by setting a reciprocating group. The V-shaped correction plate corrects the position of the pipe so that it is arranged in the center, thereby making the central axis of the pipe and the measuring rod of the internal diameter measuring instrument strictly parallel, ensuring that the internal diameter measuring instrument accurately measures the inner diameter of the pipe, thereby ensuring the accuracy of the ring stiffness measurement results of the pipe, and providing a stable geometric reference for subsequent ring stiffness tests at multiple measurement positions.

[0016] 2. The present invention positions multiple measuring positions of the pipe by setting multiple elastic positioning rods, and enables the elastic positioning rods to rotate synchronously with the workpiece by setting a connection group. When the elastic positioning rods rotate to the upper limit position and are arranged vertically, the corresponding measuring position of the pipe rotates to the upper limit position, so that each measuring position of the pipe can be accurately aligned with the position where the ring stiffness testing machine applies pressure, ensuring the use quality of the pipe after qualified measurement. There is no need to repeat the position adjustment operation for each measuring position, which is conducive to improving measurement efficiency and achieving consistency and synchronization between measurement points.

[0017] 3. This invention utilizes a V-shaped correction plate in conjunction with a reciprocating assembly to automatically center the pipe. This, combined with an elastic positioning rod and a connecting assembly, controls the synchronous rotation of the measurement position. This creates a pipe inner diameter and ring stiffness measurement system that integrates automatic centering, multi-point positioning, and precise pressure alignment. This system significantly improves measurement efficiency and data accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a three-dimensional structural diagram of a part of the structure of the present invention.

[0021] Figure 3 It is a three-dimensional structural diagram of the slide seat, mounting plate, reciprocating group and V-shaped correction plate of the present invention.

[0022] Figure 4 It is a cross-sectional view of the base, synchronizer, lifting plate and support group of the present invention.

[0023] Figure 5 It is a three-dimensional structural diagram of the locking pin, fixing ring, rotating plate and locking rod of the present invention.

[0024] Figure 6 It is a three-dimensional structural diagram of the elastic positioning rod, the pressure plate, the extension spring and the alignment rod of the present invention.

[0025] Reference numerals: 1, base; 11, support group; 111, lifting seat; 112, support roller; 113, mating column; 12, mounting hole; 2, ring stiffness testing machine; 3, calibration unit; 31, sliding seat; 311, mating seat; 312, lifting plate; 32, synchronizing member; 33, mounting plate; 34, reciprocating group; 341, reciprocating slider; 342, connecting spring; 343, elastic abutting rod; 344, mating rod; 35, V-shaped calibration plate; 351, rotating rod; 36, driving group; 361, mounting frame; 362, driving roller; 363, motor I; 4, positioning unit; 41, adjusting group; 411, connecting plate; 412, adjusting plate; 413, locking pin; 42, fixing ring; 43, connecting group; 431, electric push rod; 432, rotating plate; 433, arc-shaped slider; 434, square plate; 435, annular groove; 436, locking insertion rod; 437, dialing plate; 438, pressing plate; 439, pushing plate; 44, elastic positioning rod; 441, pressing column; 45, alignment group; 451, extending spring; 452, alignment rod. Detailed implementation mode

[0026] The embodiments described below are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention. For those techniques or conditions not specified in the embodiments, they shall be carried out according to the techniques or conditions described in the literature in this field or according to the product specifications.

[0027] Refer to Figure 1 , an engineering pipe performance measuring instrument, including a base 1, a ring stiffness testing machine 2 and a calibration unit 3 installed on the upper end of the base 1, and a positioning unit 4 located on the left side of the calibration unit 3.

[0028] It should be noted that the ring stiffness testing machine 2 adopts the existing technology and includes a pressurizing part and an inner diameter measuring instrument. The pressurizing part applies a downward radially uniform pressure to the pipe through a loading plate to simulate the stress state of the pipe under landfill or external pressure. The loading process is usually a uniform and slow loading to ensure the accuracy of the measurement data. The inner diameter measuring instrument is located on the right side of the base 1. The inner diameter measuring instrument is attached to the inner wall of the pipe through two measuring rods to achieve real-time inner diameter measurement of the pipe, and then measure the load borne by the pipe under a certain deformation of the inner diameter, so as to measure the ring stiffness of the pipe.

[0029] The present invention is used to measure the ring stiffness of the pipe. Before measuring the ring stiffness of the pipe, the present invention can calibrate the pipe to make the central axis of the pipe and the measuring rods of the inner diameter measuring instrument strictly parallel, ensure the accurate measurement of the inner diameter of the pipe by the inner diameter measuring instrument, and thus ensure the accuracy of the measurement result of the ring stiffness of the pipe. At the same time, the present invention can also accurately position multiple measuring positions of the pipe, so that each measuring position of the pipe can be accurately aligned with the pressurizing points of the pressurizing part of the ring stiffness testing machine 2, ensuring the accuracy of the measurement result.

[0030] Specifically, first, the operator marks the measurement positions of the pipe, adjusts the positioning unit 4 according to the diameter size of the pipe, then tilts the pipe first and places its right end on the inner diameter measuring instrument, and then places the pipe on the base 1. Subsequently, the pipe is moved to the left so that its left end is placed on the positioning unit 4, and the positioning unit 4 is controlled to accurately position multiple measurement positions of the pipe. Then, the correction unit 3 is controlled to first correct the pipe left and right, making the central axis of the pipe strictly parallel to the measuring rod of the inner diameter measuring instrument. Then, the correction unit 3 is controlled to drive the pipe to rotate, and in cooperation with the positioning unit 4, the correction unit 3 drives a measurement position of the pipe to rotate to the upper limit position, so that the measurement position of the pipe is accurately aligned with the pressurizing point of the ring stiffness testing machine 2. Finally, the pressurizing part of the ring stiffness testing machine 2 is controlled to apply a downward pressure to the pipe to perform the ring stiffness measurement operation of the pipe.

[0031] After the ring stiffness measurement of a measurement position of the pipe is completed, the ring stiffness testing machine 2 is controlled to stop applying pressure to the pipe. The pipe elastically returns to its initial state under the action of its own material properties. Then, the correction unit 3 is controlled to drive the pipe to rotate, and in cooperation with the positioning unit 4, the correction unit 3 drives the next measurement position of the pipe to rotate to the upper limit position. Then, the ring stiffness testing machine 2 is started again to complete the ring stiffness measurement of multiple measurement positions of the pipe. Finally, the average ring stiffness of the pipe is calculated by integrating the data of multiple measurement points. After the ring stiffness measurement of the pipe is completed, the pipe is first removed from the positioning unit 4, and then removed from the inner diameter measuring instrument, so as to take out the measured pipe.

[0032] Refer to Figure 1 and Figure 2 As shown in, the correction unit 3 includes two symmetrically arranged sliding seats 31 that are slidably installed on the base 1 before and after through a synchronizing member 32. Two symmetrically arranged mounting plates 33 are installed at the upper ends of the sliding seats 31. A V-shaped correction plate 35 is installed on the mounting plates 33 through a reciprocating group 34. The reciprocating group 34 is used to drive the V-shaped correction plate 35 to reciprocate left and right to correct the pipe. A driving group 36 is installed in the middle of the upper ends of the sliding seats 31. After the V-shaped correction plate 35 corrects the pipe, the driving group 36 drives the pipe to rotate. A support group 11 is installed in the middle of the upper side of the base 1, and the support group 11 is located between the two sliding seats 31. A plurality of uniformly arranged rotating rods 351 are rotatably installed on the V-shaped surface of the V-shaped correction plate 35 close to the middle of the base 1.

[0033] It should be noted that the synchronizing member 32 includes a synchronizing screw and a second motor. The synchronizing screw is a screw with two screw-thread segments having opposite thread directions. The synchronizing screw is connected to the two sliding seats 31 by means of screw-thread engagement, and the synchronizing screw is rotatably connected to the base 1. The front end of the synchronizing screw is fixedly connected to the output shaft of the second motor fixedly installed on the base 1. By controlling the second motor to drive the synchronizing screw to rotate, the synchronizing screw drives the two sliding seats 31 to move synchronously in and out through screw-thread engagement.

[0034] The calibration unit 3 is used for calibrating the pipe left and right; specifically, when the pipe is placed on the base 1, at this time the support group 11 does not support the pipe. Control the synchronizing member 32 to drive the two sliding seats 31 to move towards each other. The support group 11 starts to support the pipe first and slightly lifts the pipe upwards so that the pipe no longer contacts the base 1. After the pipe is lifted to the corresponding height, it remains at this height. The sliding seat 31 drives the V-shaped calibration plate 35 to move towards the pipe through the mounting plate 33 and the reciprocating group 34, so that the V-shaped surface of the V-shaped calibration plate 35 abuts against the outer side of the pipe. As the two sliding seats 31 continue to move, the reciprocating group 34 drives the corresponding V-shaped calibration plate 35 to reciprocate left and right, so that the V-shaped calibration plate 35 calibrates the pipe, thereby making the central axis of the pipe strictly parallel to the measuring rod of the inner diameter measuring instrument, ensuring the accurate measurement of the inner diameter of the pipe by the inner diameter measuring instrument, and thus ensuring the accuracy of the measurement result of the ring stiffness of the pipe.

[0035] Continue to control the synchronizing member 32 to drive the two sliding seats 31 to move towards each other, so that the sliding seats 31 drive the driving group 36 to abut against the outer side of the pipe. Then control the positioning unit 4 to contact the inner wall of the pipe and position each measuring position of the pipe. Then control the driving group 36 to drive the pipe to rotate, and cooperate with the positioning unit 4 to drive a measuring position of the pipe to rotate to the upper limit position. At this time, the support between the support group 11 and the pipe is rolling friction, and under the action of the rotating rod 351, the friction between the V-shaped calibration plate 35 and the pipe is also rolling friction, ensuring that the driving group 36 can drive the pipe to rotate.

[0036] When a measurement position of the pipe rotates to the upper limit position, first control the positioning unit 4 to no longer contact the pipe, and then control the synchronizing member 32 to drive the two sliding seats 31 to return to the initial position in the direction away from each other. The two sliding seats 31 first drive the driving group 36 to separate from the pipe. The V-shaped correction plate 35 still abuts against the outer side of the pipe under the action of the reciprocating group 34. Then the two sliding seats 31 drive the V-shaped correction plate 35 to separate from the pipe through the reciprocating group 34 and move away from the pipe to the initial position. Subsequently, the supporting group 11 drives the pipe supported thereon to move downward together. Finally, the pipe is stably placed on the base 1 again. And during this process, the loading plate of the ring stiffness testing machine 2 always abuts against the upper side of the pipe (but without applying pressure) and moves downward with the pipe. That is, through the cooperation of the loading plate and the supporting group 11, and the loading plate and the base 1, it is ensured that the pipe is continuously in a stable state, ensuring that the pipe is stably placed on the base 1 again with one of its measurement positions always in the upper limit position, thereby making this measurement position always aligned with the pressurizing point of the pressure plate. Subsequently, with the loading plate abutting against the upper side of the pipe, control the inner diameter measuring instrument of the ring stiffness testing machine 2 to continuously measure the inner diameter of the pipe, and control the pressurizing part of the ring stiffness testing machine 2 to apply a downward radially uniform pressure to the pipe through the loading plate. Since the pipe has been corrected and the loading plate always abuts against the upper side of the pipe and applies a uniform downward pressure to the pipe, during the process of the pipe being pressurized, the measurement position of the pipe at the upper limit position always aligns with the pressurizing point of the loading plate, and the central axis of the pipe and the measuring rod of the inner diameter measuring instrument are always strictly parallel. By measuring the load borne by the pipe at a certain deformation amount of the inner diameter, the ring stiffness of one measurement position of the pipe is measured. And at this time, both the driving group 36 and the V-shaped correction plate 35 are in the initial position and will not affect the measurement result.

[0037] After the ring stiffness of a measurement position on the pipe is measured, repeat the above steps to make the support group 11 support the pipe again, slightly lift the pipe upward, and during the lifting process of the pipe, control the loading plate of the ring stiffness testing machine 2 to always abut against the upper side of the pipe. The pipe is stably lifted upward so that the first measurement position is always at the upper limit position. Then, control the positioning unit 4 to contact the inner wall of the pipe again. Since the first measurement position is always at the upper limit position, when the positioning unit 4 contacts the inner wall of the pipe, the four measurement positions still maintain the previous positioning alignment state with the positioning unit 4. Then, control the synchronizing member 32 to make the V-shaped correction plate 35 abut tightly against the outer side of the pipe. After controlling the loading plate of the ring stiffness testing machine 2 to separate from the pipe, control the driving group 36 to cooperate with the positioning unit 4 to drive the second measurement position to rotate to the upper limit position. After the rotation ends, the loading plate moves downward to abut against the pipe, and then the synchronizing member 32 drives the V-shaped correction plate 35 and the driving group 36 to return to the initial position, and the pipe is placed on the base 1 again. Subsequently, control the ring stiffness testing machine 2 to measure the ring stiffness of the second measurement position. According to the above operation process, and so on, complete the detection of each measurement position of the pipe, and each measurement position of the pipe can be accurately aligned with the pressurizing point of the ring stiffness testing machine 2 to ensure the accuracy of the measurement results.

[0038] Refer to Figure 2 and Figure 3 , a square hole is formed in the upper side of the mounting plate 33. The reciprocating group 34 includes a reciprocating slider 341 slidably mounted left and right in the square hole. Both the left and right sides of the reciprocating slider 341 are connected to the inner wall of the square hole through a plurality of connecting springs 342. An elastic abutting rod 343 is slidably mounted front and back at one end of the reciprocating slider 341 close to the middle of the base 1, and the end of the elastic abutting rod 343 far from the middle of the base 1 slidably penetrates through the reciprocating slider 341 front and back. The end of the elastic abutting rod 343 close to the middle of the base 1 is hinged to the corresponding V-shaped correction plate 35 through a torsion spring shaft.

[0039] Refer to Figure 1 , Figure 2 and Figure 3 , a matching rod 344 is fixedly mounted on the lower part of the end of the elastic abutting rod 343 far from the middle of the base 1. A matching seat 311 is mounted on the upper side of the sliding seat 31 at a position corresponding to the matching rod 344. A waveform groove is formed in the matching seat 311, and the matching rod 344 is slidably mounted in the corresponding waveform groove.

[0040] The reciprocating group 34 is used to drive the V-shaped correction plate 35 to correct the pipe; specifically, when the V-shaped correction plate 35 moves to the corresponding position of the pipe, under the hinge action between it and the elastic abutting rod 343, the V-shaped surface of the V-shaped correction plate 35 can adaptively abut against the outer side of pipes with different diameters. When the V-shaped correction plate 35 abuts against the outer side of the pipe and the slide seat 31 continues to move towards the middle of the base 1, the V-shaped correction plate 35 drives the elastic abutting rod 343 to move away from the pipe relative to the reciprocating slider 341 under the obstruction of the pipe. The elastic abutting rod 343 drives the mating rod 344 to move away from the pipe relative to the mating seat 311, so that the mating rod 344 and the corrugated groove cooperate to drive the elastic abutting rod 343 to move left and right reciprocally. The elastic abutting rod 343 drives the reciprocating slider 341 to move left and right reciprocally, and the connecting spring 342 follows and deforms telescopically, enabling the V-shaped correction plate 35 to correct the pipe, so that the central axis of the pipe is strictly parallel to the measuring rod of the inner diameter measuring instrument, ensuring the accurate measurement of the inner diameter of the pipe by the inner diameter measuring instrument, and thus ensuring the accuracy of the measurement result of the pipe ring stiffness.

[0041] Refer to Figure 2 and Figure 3 As shown in FIGS. and, the driving group 36 includes two symmetrically arranged mounting brackets 361 fixedly installed on the upper end of the slide seat 31 near one side of the middle of the base 1, and the upper ends of the mounting brackets 361 are inclined towards the middle of the base 1. A driving roller 362 is rotatably installed at the common upper end of the opposite sides of the two mounting brackets 361, and the left side of the driving roller 362 is connected to the output shaft of the first motor 363 fixedly installed on the slide seat 31.

[0042] Refer to Figure 2 and Figure 4 As shown in FIGS. and, two symmetrically arranged mounting holes 12 are formed in the middle of the upper side of the base 1, and two through holes are further formed in the base 1, which are arranged left and right and communicate with the two mounting holes 12. The supporting group 11 includes a lifting seat 111 slidably installed up and down in the mounting hole 12. A supporting roller 112 is rotatably installed at the upper end of the lifting seat 111. Matching columns 113 are fixedly installed on both the left and right sides of the lifting seat 111. Lifting plates 312 are fixedly installed at the opposite sides of the two slide seats 31 and corresponding to the matching columns 113, and the lifting plates 312 are arranged in the corresponding through holes. The two lifting plates 312 corresponding to the same through hole are arranged staggered left and right. The end of the upper side of the lifting plate 312 far from the corresponding slide seat 31 is provided as an inclined surface, and the inclined surface of the lifting plate 312 is in contact with the corresponding matching column 113.

[0043] It should be noted that the output shaft of the first motor 363 is connected to the driving roller 362 through a transmission belt (not shown in the figure), and the transmission belt is arranged inside the left mounting bracket 361. Starting the first motor 363 drives the driving roller 362 to rotate through the transmission belt.

[0044] Refer to Figure 1 、 Figure 2、 Figure 3 and Figure 4 When the two slides 31 move toward each other, the slide 31 drives the lifting plate 312 to move synchronously, and the inclined surface of the lifting plate 312 and the matching column 113 cooperate to drive the corresponding lifting seat 111 to move upward in the mounting hole 12, and the lifting seat 111 drives the supporting roller 112 to support the pipe and slightly lift the pipe upward, and the two slides 31 drive the corresponding active roller 362 to move toward each other through the mounting bracket 361, so that the active roller 362 can be pressed against the outside of the pipe, and then the motor 1 363 is started to drive the active roller 362 to rotate. Under the action of the supporting roller 112 and the rotating rod 351, the two active rollers 362 drive the pipe to rotate, and cooperate with the positioning unit 4 to make the active roller 362 drive the measuring position of the pipe to rotate to the upper limit position, so that each measuring position of the pipe can be accurately aligned with the pressure point of the ring stiffness testing machine 2, ensuring the use quality of the pipe after qualified measurement.

[0045] See Figure 1 、 Figure 2 and Figure 6 The positioning unit 4 includes an adjustment group 41 installed on the base 1, and a fixing ring 42 is installed on the adjustment group 41. The adjustment group 41 is used to adjust the height of the fixing ring 42. A plurality of circumferentially arranged and position-adjustable elastic positioning rods 44 are installed on the fixing ring 42 through a connecting group 43. The measuring position of each pipe is accurately positioned by adjusting the position of the elastic positioning rod 44. The connecting group 43 is used to drive the plurality of elastic positioning rods 44 to press against the inner wall of the pipe, so that the pipe drives the elastic positioning rods 44 to rotate synchronously. When the upper elastic positioning rod 44 is arranged vertically, the measuring position of the corresponding pipe and the pressure point of the ring stiffness testing machine 2 are accurately aligned, and the plurality of square plates 434 are installed with alignment groups 45 on the back sides.

[0046] The positioning unit 4 is used to accurately locate the measuring position of the pipe. Specifically, the adjustment group 41 is first controlled to adjust the height of the fixed ring 42 so that the central axis of the fixed ring 42 is aligned with the central axis of the pipe after being lifted by the support roller 112. The position of each elastic positioning rod 44 is adjusted according to the interval between multiple measuring positions of the pipe, and one of the elastic positioning rods 44 is placed in the upper limit position and arranged vertically. The elastic positioning rods 44 can locate the measuring position of pipes of different diameters, increasing the applicability of the measuring instrument. When the pipe is placed on the base 1, the multiple elastic positioning rods 44 and the measuring rods in the inner diameter measuring instrument are positioned inside the pipe by moving them left and right. During subsequent operations, the elastic positioning rods 44 and the measuring rods in the inner diameter measuring instrument are always located inside the pipe.

[0047] Then rotate the pipe so that one of the measuring positions of the pipe is at the upper limit position (which can be assisted by setting a scale line / indicator mark on the fixing ring 42). At this time, the elastic positioning rod 44 that is at the upper limit position and arranged vertically corresponds to the measuring position at the upper limit position, and since the interval between each elastic positioning rod 44 is consistent with the interval between multiple measuring positions of the pipe, the position of the elastic positioning rod 44 and the measuring position of the pipe are aligned one by one, and then control the connection group 43 to drive the multiple elastic positioning rods 44 to press against the inner wall of the pipe, and at this time, the multiple elastic positioning rods 44 and the multiple measuring positions of the pipe are still aligned one by one. When the elastic positioning rod 44 is pressed against the inside of the pipe, when the pipe rotates, it will drive the elastic positioning rod 44 to rotate synchronously. The alignment group 45 can position the corresponding elastic positioning rod 44 to ensure that the elastic positioning rod 44 can be rotated to the upper limit position. When the corresponding elastic positioning rod 44 is rotated to the upper limit position, it is arranged vertically and the measuring position of the corresponding pipe is rotated to the upper limit position, so that each measuring position of the pipe can be accurately aligned with the pressure point of the ring stiffness testing machine 2, ensuring the accuracy of the measurement results.

[0048] See Figure 1 、 Figure 2 and Figure 5 The adjustment group 41 includes two connecting plates 411 fixedly mounted on the base 1 and arranged symmetrically in front and back. Adjustment plates 412 are slidably mounted on the opposite sides of the two connecting plates 411. The fixing ring 42 is fixedly mounted between the opposite sides of the two adjustment plates 412. The two connecting plates 411 are provided with a plurality of jacks evenly arranged up and down on the opposite sides. Locking pins 413 are detachably mounted in the jacks. The locking pins 413 are threadedly engaged with the jacks. The two adjustment plates 412 are provided with locking holes that cooperate with the locking pins 413 on the opposite sides of the two adjustment plates.

[0049] The adjustment group 41 is used to adjust the height of the fixing ring 42; specifically, first screw the locking pin 413 to move it out of the locking hole and the insertion hole, and then the operator pushes the fixing ring 42 upward, and the fixing ring 42 drives the two adjustment plates 412 to move upward. When the height adjustment of the adjustment plate 412 is completed, screw the locking pin 413 to insert it into the corresponding insertion hole and locking hole at this time, so as to realize the height adjustment of the fixing ring 42 and the locking after adjustment, so that the central axis of the fixing ring 42 is aligned with the central axis of the pipe after being lifted by the support roller 112.

[0050] See Figure 1 、 Figure 2 、 Figure 5 and Figure 6, the connecting group 43 includes a rotating plate 432 rotatably mounted inside the fixed ring 42. An annular groove 435 is formed on the right side of the rotating plate 432. A plurality of circumferentially arranged arc-shaped sliders 433 are slidably mounted in the annular groove 435. A square plate 434 is fixedly mounted on the right side of the arc-shaped slider 433. The right side of the square plate 434 is radially slidably connected to its corresponding elastic positioning rod 44. A plurality of circular holes are formed on the left side of the rotating plate 432 at positions corresponding to the annular groove 435 and are arranged circumferentially and evenly. A locking plug 436 is detachably mounted in the circular hole. The locking plug 436 is threadedly connected to the circular hole. A mating hole is formed on the left side of the arc-shaped slider 433. The locking plug 436 is used to cooperate with the mating hole to lock the position of the arc-shaped slider 433.

[0051] Refer to Figure 6 , on the opposite sides of a plurality of the elastic positioning rods 44, they slidably penetrate through the corresponding square plates 434 and fixedly mount two symmetrically arranged pressing columns 441. On the opposite sides of a plurality of square plates 434, a dial plate 437 is slidably mounted left and right through a connecting block. Two symmetrically arranged pressing plates 438 are fixedly mounted on the right side of the dial plate 437. The right end of the pressing plate 438 is provided with an inclined surface on one side close to the central axis of the rotating plate 432, and the inclined surface of the pressing plate 438 is in contact with the corresponding pressing column 441. A plurality of pressing plates 438 are jointly in contact with a push plate 439 on the left side. An electric push rod 431 is connected between the left side of the push plate 439 and the rotating plate 432; wherein, the rotating plate 432 and the fixed ring 42 are connected by a bearing (not shown in the figure) to ensure that the rotating plate 432 can rotate smoothly.

[0052] Refer to Figure 2 and Figure 6 , the alignment group 45 includes an L-shaped alignment rod 452 slidably mounted left and right on the square plate 434 through a top extension spring 451. An alignment hole is formed in the upper right part of the fixed ring 42. When the horizontal section of the alignment rod 452 is inserted into the alignment hole, its corresponding elastic positioning rod 44 is vertically arranged, and the pipe measuring position corresponding to the elastic positioning rod 44 is located at the upper limit position.

[0053] Refer to Figure 1 、 Figure 2 、 Figure 5 and Figure 6, the connection group 43 is used to drive a plurality of elastic positioning rods 44 to abut against the inner wall of the pipe, and the alignment group 45 is used to ensure that the corresponding elastic positioning rods 44 are vertically arranged; specifically, initially, the push plate 439 is at the right extreme position, making the pressure plate 438 at the right extreme position. At this time, the inclined surface of the pressure plate 438 and the corresponding pressure column 441 cooperate to make the elastic positioning rod 44 in a compressed state. First, screw the locking plug 436 out of the round hole, and then, according to the interval angle between multiple measurement positions of the pipe, manually move the arc-shaped slider 433 to slide in the annular groove 435 to adjust its position, and move one of the arc-shaped sliders 433 to slide in the annular groove 435 to the upper extreme position. Then, screw the locking plug 436 into the corresponding round hole and locking hole to lock the position of the arc-shaped slider 433; the arc-shaped slider 433 drives each elastic positioning rod 44 to move through the square plate 434, so that the interval between each elastic positioning rod 44 corresponds to the interval between multiple measurement positions of the pipe, and one of the elastic positioning rods 44 is vertically arranged and located at the upper extreme position.

[0054] Before controlling the driving roller 362 to drive the pipe to rotate, control the electric push rod 431 to drive the push plate 439 to move leftward to the left extreme position. A plurality of elastic positioning rods 44 move away from each other under their own elastic action. The elastic positioning rod 44 drives the dial 437 to move leftward through the cooperation of the corresponding pressure column 441 and the inclined surface of the pressure plate 438. The dial 437 is always in contact with the push plate 439. Finally, a plurality of elastic positioning rods 44 abut against the inner side of the pipe. At this time, the vertically arranged elastic positioning rod 44 corresponds to the measurement position at the upper extreme position, and the remaining elastic positioning rods 44 are aligned with the remaining measurement positions of the pipe one by one. During the subsequent process of changing the measurement position, when the pipe rotates, the pipe finally drives the rotating plate 432 to rotate through a plurality of elastic positioning rods 44 and the square plate 434. The square plate 434 drives the alignment rod 452 to rotate. Before the alignment rod 452 corresponds to the alignment hole, its end face rotates along the side surface of the fixed ring 42 and the top extension spring 451 is in a compressed state.

[0055] When the horizontal section of the alignment rod 452 rotates to the position corresponding to the alignment hole, the horizontal section of the alignment rod 452 is inserted into the alignment hole. At this time, the corresponding elastic positioning rod 44 is vertically arranged, and the pipe measuring position corresponding to the elastic positioning rod 44 is located at the upper limit position. Then, control the driving roller 362 to stop driving the pipe to rotate, so that each measuring position of the pipe can be accurately aligned with the pressurizing point of the ring stiffness testing machine 2. When performing the ring stiffness test on the pipe, control the electric push rod 431 to drive the push plate 439 to move to the right extreme position. The push plate 439 drives the dial plate 437 to move to the right. The dial plate 437 drives a plurality of elastic positioning rods 44 to move towards each other through the cooperation of the inclined surface of the corresponding pressing plate 438 and the pressing column 441, so that the elastic positioning rods 44 are separated from the inner side wall of the pipe by a certain distance. And at this time, the horizontal section of the alignment rod 452 located at the upper limit position is inserted into the alignment hole, so that the rotating plate 432 is always stationary relative to the fixed ring 42. The distance between the elastic positioning rod 44 and the inner side wall of the pipe is greater than the distance of the up and down movement of the pipe. Therefore, although the elastic positioning rod 44 is always located inside the pipe, it will not affect the up and down movement of the pipe nor the ring stiffness measurement of the pipe.

[0056] When the measurement of one measuring position of the pipe is completed and the pipe needs to be rotated, since the loading plate of the ring stiffness testing machine 2 always abuts against the upper side of the pipe during the process of the pipe being lifted by the supporting roller 112, the pipe is stably lifted upwards, so that the first measuring position is always at the upper limit position. When the plurality of elastic positioning rods 44 are again pressed tightly against the inner side of the pipe, each measuring point still corresponds exactly to each elastic positioning rod 44 one by one. Then, the alignment rod 452 inserted into the alignment hole is removed from the alignment hole, and the loading plate of the ring stiffness testing machine 2 is separated from the pipe, so that the driving roller 362 drives the pipe to rotate, and thus the other measuring positions of the pipe can be rotated to the upper limit position in sequence.

[0057] In addition, it should be understood that although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0058] In the embodiments of the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0059] In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, the terms "arranged", "connected", "installed" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, an integral connection or a sliding connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0060] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A performance measuring instrument for engineering pipes, comprising a base and a ring stiffness testing machine installed in the middle of the upper end thereof, characterized in that, The upper end of the base is also provided with a calibration unit and a positioning unit located on the left side of the calibration unit; The calibration unit includes two sliding seats that are slidably mounted on the base before and after through a synchronizing member. The sliding seats are arranged symmetrically before and after. Two mounting plates that are arranged symmetrically left and right are mounted on the upper ends of the sliding seats. A V-shaped calibration plate is mounted on the mounting plates through a reciprocating group. A driving group is mounted in the middle of the upper ends of the sliding seats. The reciprocating group is used to drive the V-shaped calibration plate to reciprocate left and right to calibrate the pipe so that the pipe is arranged in the center. After the pipe is arranged in the center, the driving group drives the pipe to rotate; The positioning unit includes an adjusting group mounted on the base. A fixing ring is mounted on the adjusting group. The adjusting group is used to adjust the height of the fixing ring so that it is coaxial with the axis of the pipe. A plurality of circumferentially arranged and position-adjustable elastic positioning rods are mounted on the fixing ring through a connecting group. The position of the elastic positioning rods is adjusted to accurately position the measurement position of the pipe. The elastic positioning rods correspond to the measurement positions one by one. The connecting group is used to drive the plurality of elastic positioning rods to abut against the inner wall of the pipe, so that the pipe drives the elastic positioning rods to rotate synchronously. When the upper elastic positioning rod is arranged vertically, its corresponding measurement position is accurately aligned with the pressurizing point of the ring stiffness testing machine.

2. The performance measuring instrument for engineering pipes according to claim 1, characterized in that, A square hole is opened on the upper side of the mounting plate. The reciprocating group includes a reciprocating slider that is slidably mounted in the square hole. Both the left and right sides of the reciprocating slider are connected to the inner wall of the square hole through a plurality of connecting springs. An elastic abutting rod is slidably mounted before and after at one end of the reciprocating slider close to the middle of the base. The end of the elastic abutting rod away from the middle of the base slidably penetrates through the reciprocating slider before and after. One end of the elastic abutting rod close to the middle of the base is hinged to the corresponding V-shaped calibration plate through a torsion spring shaft.

3. The performance measuring instrument for engineering pipes according to claim 2, wherein A mating rod is fixedly mounted on the lower part of the end of the elastic abutting rod away from the middle of the base. A mating seat is mounted on the upper side of the sliding seat and at a position corresponding to the mating rod. A corrugated groove is opened on the mating seat, and the mating rod is slidably mounted in the corresponding corrugated groove.

4. An engineering pipe material performance measuring instrument according to claim 1, characterized in that, The driving group includes two mounting frames that are arranged symmetrically left and right and fixedly mounted on the upper end of the sliding seat close to one side of the middle of the base. The upper ends of the mounting frames are inclined towards the direction close to the middle of the base. A driving roller is rotatably mounted on the common upper end of the opposite sides of the two mounting frames. The left side of the driving roller is connected to the output shaft of a first motor fixedly mounted on the sliding seat.

5. The performance measuring instrument for engineering pipes according to claim 1, characterized in that, Two mounting holes that are arranged symmetrically before and after are opened in the middle of the upper side of the base, and two through holes that are arranged left and right and communicate with the two mounting holes. A supporting group is mounted in the middle of the upper side of the base. The supporting group includes a lifting seat that is slidably mounted up and down in the mounting hole. A supporting roller is rotatably mounted on the upper end of the lifting seat. A mating column is fixedly mounted on both the left and right sides of the lifting seat. Lifting plates are fixedly mounted on the opposite sides of the two sliding seats and at positions corresponding to the mating columns. The lifting plates are arranged in the corresponding through holes. The two lifting plates corresponding to the same through hole are arranged staggered left and right. The upper ends of the lifting plates away from the corresponding sliding seats are all provided with inclined surfaces, and the inclined surfaces of the lifting plates are in contact with the corresponding mating columns.

6. The performance measuring instrument for engineering pipes according to claim 1, characterized in that, The adjustment group includes two connecting plates arranged symmetrically front and back and fixedly installed on the base. Adjusting plates are slidably installed up and down on the opposite sides of the two connecting plates. A fixing ring is fixedly installed between the opposite sides of the two adjusting plates. A plurality of jacks are evenly arranged up and down on the opposite sides of the two connecting plates. Locking pins are installed in the jacks in a detachable manner. Locking holes that cooperate with the locking pins to lock the positions of the adjusting plates are provided on the opposite sides of the two adjusting plates.

7. The performance measuring instrument for engineering pipes according to claim 1, characterized in that, The connection group includes a rotating plate rotatably installed inside the fixing ring. An annular groove is provided on the right side of the rotating plate. A plurality of arc-shaped sliders arranged circumferentially are slidably installed in the annular groove. A square plate is fixedly installed on the right side of the arc-shaped slider. The right side of the square plate is radially slidably connected to its corresponding elastic positioning rod. A plurality of circular holes are evenly arranged circumferentially at the position corresponding to the annular groove on the left side of the rotating plate. Locking insertion rods are installed in the circular holes in a detachable manner. Matching holes are provided on the left sides of the arc-shaped sliders.

8. The performance measuring instrument for engineering pipes according to claim 7, characterized in that, The opposite sides of a plurality of elastic positioning rods slidably penetrate through the corresponding square plates and fixedly install two symmetrically arranged pressing columns. The opposite sides of a plurality of square plates are slidably installed left and right with a dial plate through a connecting block. Two symmetrically arranged pressing plates are fixedly installed on the right side of the dial plate. One side of the right end of the pressing plate close to the central axis of the rotating plate is set as an inclined surface, and the inclined surface of the pressing plate is in contact with the corresponding pressing column. A push plate is jointly arranged in contact with the left sides of a plurality of pressing plates. An electric push rod is connected between the left side of the push plate and the rotating plate.

9. An engineering pipe material performance measuring instrument according to claim 8, characterized in that, Alignment groups are installed on the opposite sides of a plurality of square plates. The alignment group includes an L-shaped alignment rod slidably installed left and right on the square plate through a top extension spring. An alignment hole is provided in the upper part on the right side of the fixing ring. When the horizontal section of the alignment rod is inserted into the alignment hole, its corresponding elastic positioning rod is vertically arranged, and the measuring position corresponding to the elastic positioning rod is located at the upper limit position.

10. The performance measuring instrument for engineering pipes according to claim 1, wherein, A plurality of evenly arranged rotating rods are rotatably installed on the V-shaped surface of the V-shaped correction plate close to the middle part of the base.

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