CN209727056U - Bend pipe ellipticity measuring device - Google Patents

Abstract

The utility model discloses a device for measuring the ellipticity of a curved pipe section, which comprises a base, a pipe fitting ellipticity measuring module and a pipe fitting positioning module. The pipe fitting ellipticity measurement module and the pipe fitting positioning module are installed on the base, the pipe fitting positioning module is equipped with an elbow, the pipe fitting ovality measurement module can rotate 360 degrees around the pipe fitting, and the scale on it The shaft can move up and down, thereby driving the infrared probe to move up and down, and the workpiece base on the pipe fitting positioning module can be rotated to adjust the section of the pipe bend on it to a horizontal position, so that the bend can be quickly measured The ellipticity of the section, the device of the utility model is modularized and has strong versatility.

Description

Measuring device for ellipticity of bent pipe section

technical field

The utility model relates to a measuring device for pipe fittings, in particular to a measuring device for the ellipticity of a curved pipe section.

Background technique

Metal pipe fittings are bent into shape by determining a reasonable fulcrum and stress point and applying a certain bending moment or bending force. During the bending and forming process of pipe fittings, the outer side of the bending deformation zone is subjected to tangential tensile stress, and the pipe wall is thinned, or even cracked; the inner side is subjected to tangential compressive stress, and the pipe wall is thickened, or even wrinkled; The inward compressive stress causes the section to flatten and distort, or even collapse. After unloading, due to the residual stress inside the elbow and the recovery of elastic deformation, springback occurs. It can be seen that problems such as cracking, wrinkling, section distortion and springback are prone to occur during the bending forming process of pipe fittings, which is a complex forming process with multiple forming defects.

When metal elbows are used in different fields, there are corresponding standards or requirements for their forming performance indicators, such as wall thickness reduction rate, wall thickness increase rate, wrinkle degree, ellipticity and springback accuracy. After each metal pipe fitting is bent and formed, the relevant forming performance indicators must be measured. Among them, shape forming performance indicators, such as wrinkle degree, ellipticity and springback accuracy, etc., can be measured with special equipment such as 3D global coordinate measuring instrument, but the cost is high, and special fixtures need to be designed. Manual positioning measurement can also be used, but the accuracy is not high and the efficiency is low.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides a device for measuring the ellipticity of a curved pipe section with high modularization degree, high measurement precision, simple operation, high modularization degree and high operation efficiency.

In order to achieve the above object, the technical scheme that the utility model adopts is as follows:

A device for measuring the ellipticity of a curved pipe section, comprising a base, a pipe ellipticity measurement module, and a pipe positioning module; the pipe ellipticity measurement device includes a rotating base, a scale shaft bracket, a scale shaft and an infrared probe; wherein the rotating base It is installed on the base through a thrust ball bearing, and the rotating base is fixedly connected with two scale shaft brackets through a connecting piece. Each scale shaft bracket is equipped with a scale shaft that can be adjusted up and down, and the adjustment direction and thrust The axis directions of the ball bearings are the same, and an infrared probe is installed on the upper end of the scale shaft; the pipe positioning module includes a support shaft, a workpiece base, an angle indicator for measuring the rotation angle of the workpiece base relative to the support shaft, and a clamping mechanism and a clamping mechanism; wherein the upper end of the support shaft and the workpiece base are fixedly connected by a clamping mechanism, and an angle indicator is installed on the clamping mechanism; the lower end of the support shaft passes through the center of the rotating base. After the hole, it is fixedly connected with the base, and the upper surface of the workpiece base is fixedly equipped with an elbow through a clamping mechanism.

The clamping mechanism includes a pressing block, a stopper, a lead screw and a rotary handle; the workpiece base includes a cylindrical block and a first rectangular block connected to the middle of the bottom surface of the cylindrical block; There is a second bolt hole with a keyway, and the upper surface of the cylindrical block of the workpiece base is provided with at least three rectangular chute evenly distributed along the circumferential direction, the pressure block is slidably installed in the rectangular chute and sleeved on On the bar, the block is fixed in the rectangular chute, the screw is also supported and installed on the block, and a rotating handle is installed at one end of the screw passing through the block;

The clamping mechanism includes round head bolts and a support shaft with a U-shaped groove at the upper end; the first rectangular block of the workpiece base is installed in the U-shaped groove of the support shaft; the two side walls of the U-shaped groove There are first pin holes with key slots; the round head bolts are sequentially inserted into the first pin holes with key slots on the side wall of the U-shaped slot, the second pin holes with key slots and the U-shaped slot on the first rectangular block of the workpiece base. After the first bolt hole with a keyway on the other side wall, it is fixedly connected by a nut, and the first rectangular block at the lower end of the workpiece base is fixedly connected with the round head bolt by a key.

The clamping mechanism also includes a rectangular fastener, and a side wall shaft groove is provided on the side wall surface of the U-shaped groove; a rectangular fastener is installed on the side wall shaft groove.

The angle indicator includes a display, a pointer resistor and a U-shaped resistor; the U-shaped resistor is bonded to the side wall of the U-shaped groove of the support shaft, and one end of the pointer resistor is fixed on the clamping On the round head bolt of the mechanism, the other end is in contact with the U-shaped resistor sheet, and the pointer-shaped resistor sheet and the U-shaped resistor sheet are respectively connected to the display through lines.

The connector includes a long shaft and a second rectangular block, the long shaft is fixedly connected to the rotating base through the through holes opened on both sides of the rotating base, and the two ends of the long shaft are respectively fixedly connected to the second rectangular block , the scale axis support is fixed on the second rectangular block.

The upper end surface of the workpiece base is marked with a baseline for the clamping of the elbow along the radial direction. It is aligned with the baseline on the base of the workpiece.

The infrared probe is also connected to the computer through bluetooth, and the measured data is transmitted to the computer in real time.

The scale shaft and the scale shaft bracket realize the circumferential positioning through the key.

The ring positioning of the scale shaft support and the second rectangular block is achieved through keys.

The beneficial effects of the utility model are as follows:

(1) The workpiece base can be rotated around the support shaft, and the rotation angle can be displayed by the rotation angle measuring device, so that the rotation angle of the workpiece base can be adjusted to make the bend pipes with different bending angles on it clamped. The section of the curved section is rotated to a horizontal position to facilitate the measurement of ellipticity at this section.

(2) The scale shaft can be pressed and positioned by tightening the set screw on the hollow cylinder. There are scales on the outer surface of the scale shaft to display the installation height of the infrared probe, and it is beneficial to ensure that the probes on both sides are at the same height. The ellipticity of the cross-section of the bent section of the bent pipe of different lengths is measured.

(3) The cooperation between the rotating base and the support shaft is a clearance fit, so it can rotate around the support shaft, thereby driving the infrared probes on both sides to rotate 360 degrees around the measured elbow, and then accurately measure the bending section The maximum and minimum diameters of the cross-sections are used to calculate the precise ovality.

(4) Thrust ball bearings are installed between the rotating base and the base, thereby reducing the frictional resistance of the rotating base during rotation.

(5) The utility model adopts a modular form, which is convenient to replace parts and has strong versatility.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the enlarged schematic view of the pipe fitting measuring device in Fig. 1;

Fig. 3 is an enlarged schematic diagram of the infrared probe in Fig. 2;

Figure 4 is an enlarged schematic view of the scale axis bracket in Figure 2;

Figure 5 is an enlarged schematic view of the scale axis in Figure 2;

Fig. 6 is an enlarged perspective view of the pipe positioning device in Fig. 1;

Fig. 7 is an enlarged schematic diagram of the installation relationship between the pipe positioning device and the angle indicator in Fig. 1;

Fig. 8 is an enlarged view of the upper surface of the cylindrical block of the workpiece base in Fig. 1;

An enlarged view of the connection relationship between the cylindrical block of the workpiece base and the first rectangular block in Fig. 1 in Fig. 9;

Fig. 10 is an enlarged schematic view of the block in Fig. 6;

Figure 11 is an enlarged schematic view of the leading screw in Figure 6;

Fig. 12 is an enlarged schematic view of the rotating handle in Fig. 6;

Figure 13 is an enlarged schematic view of the support shaft in Figure 6;

Fig. 14 is an enlarged schematic view of round head bolts in Fig. 6;

Fig. 15 is an enlarged schematic view of the rectangular fastener in Fig. 6;

Fig. 16 is an enlarged schematic view of the angle display instrument in Fig. 7;

Fig. 17 is an enlarged schematic view of the base in Fig. 1 .

Detailed ways

The utility model will be described in detail below according to the accompanying drawings and preferred embodiments, and the purpose and effect of the utility model will become clearer. The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in FIGS. 1-17 , a device for measuring the ellipticity of a curved pipe section in this embodiment includes a base 1 , a pipe ellipticity measurement module 2 and a pipe positioning module 3 . The pipe ellipticity measurement module 2 includes a rotating base 21 , a scale shaft bracket 24 , a scale shaft 25 and an infrared probe 26 ; wherein the base 1 includes a base 11 , a pin 12 and a thrust ball bearing 13 . The center of the base 11 is provided with a positioning device blind hole 111, and the side is provided with a first pin hole 112; the upper surface of the base 11 is concentrically equipped with a thrust ball bearing 13, and the rotating base 21 is concentrically installed on the On the thrust bearing 13, the rotating base 21 is fixedly connected with two scale shaft brackets 24 by a connector, each of the scale shaft brackets 24 is equipped with a scale shaft 25 that can be adjusted up and down, and the adjustment direction is consistent with the thrust ball. The axial directions of the bearings 13 are the same, and the upper end of the scale shaft 25 is equipped with an infrared probe 26; The through hole is fixedly connected with the rotating base 21 , and the two ends of the long axis 22 are respectively fixedly connected with the second rectangular block 23 , and the scale shaft support 24 is fixed on the second rectangular block 23 .

The outer surface of the scale shaft 25 is marked with a scale 251, the upper end of the scale shaft 25 is provided with a second blind hole 252 with a keyway, the cylinder at the lower end of the infrared probe 26 is provided with a keyway, and the infrared probe 26 is provided with a keyway. The keyway at the lower end is used to install the key into the second blind hole 252 with keyway of the scale shaft 25; the infrared probe 26 is also connected to the computer via bluetooth to transmit the measured data to the computer in real time. The inside of the scale shaft bracket 24 is provided with a through hole 241 with a keyway, the outside of the upper end of the scale shaft bracket 24 is provided with a third threaded hole 242, the outer surface of the scale shaft 25 is provided with a keyway, and the scale shaft 25 is provided with a keyway. The keyway on the outer surface of the shaft 25 is used for installing the key and then loaded into the through hole 241 with keyway of the scale shaft bracket 24, and the scale shaft 25 is pressed and positioned by screwing in the set screw at the third threaded hole 242. . The upper surface of the second rectangular block 23 is provided with a first keyway blind hole 232, and the outer surface of the scale shaft bracket 24 is provided with a keyway, and the keyway on the outer surface of the scale shaft bracket 24 is used for installing the key. Put it into the first blind hole 232 with key grooves of the second rectangular block 23 . The long side of the second rectangular block 23 is provided with two second long axis through holes 231, the short side is provided with a second threaded hole 233, and the two sides of the rotating base 21 are provided with first A long axis through hole 211, a first through hole 212 is arranged in the middle, and a first threaded hole 213 is arranged on both sides. The long axis 22 passes through the first long axis through hole 211 of the rotating base 21, and the long axis 22, the two ends are respectively loaded into the second long axis through holes 231 of the two second rectangular blocks 23, and set screws are screwed into the second threaded holes 233 and the first threaded holes 213 to the second rectangular block 23 in the long Compression positioning on the shaft 22 and compression positioning of the long axis 22 in the rotating base 21 . The infrared probe 26 can be connected with a computer via bluetooth, and the measured data can be transmitted to the computer in real time.

The pipe positioning module 3 includes a support shaft 31, a workpiece base 34, an angle indicator 39 for measuring the rotation angle of the workpiece base 34 relative to the support shaft 31, a clamping mechanism and a clamping mechanism; wherein the support shaft 31 The upper end and the workpiece base 34 are fixedly connected by a clamping mechanism, and an angle indicator 39 is installed on the clamping mechanism; the lower end of the support shaft 31 passes through the through hole in the center of the rotating base 21 and is fixed with the base 1 Connected, that is, the lower end of the support shaft 31 is inserted into the blind hole 111 of the positioning device of the base 11 through the first through hole 212 of the rotating base 21, and is connected to the first pin hole 112 of the base 11 and the second pin hole 112 of the support shaft 31. The pin 12 is inserted into the pin hole 311 for positioning. An elbow 4 is fixedly installed on the upper surface of the workpiece base (34) through a clamping mechanism.

The clamping mechanism includes a pressing block 35, a block 36, a lead screw 37 and a rotary handle 38; the workpiece base 34 includes a cylindrical block 40, a first rectangular block 41 connected to the middle of the bottom surface of the cylindrical block 40; The first rectangular block 41 is provided with a second bolt hole 344 with a keyway, and the upper surface of the cylindrical block 40 of the workpiece base 34 is provided with at least three rectangular slide grooves 341 uniformly distributed along the circumferential direction. The block 35 is slidably installed in the rectangular chute 341 and sleeved on the lead screw 37, the block 36 is fixed in the rectangular chute 341, the lead screw 37 is also supported and installed on the block 36, and the The end of the screw 37 passing through the block 36 is equipped with a rotary handle 38; the inner end of the rectangular chute 341 is provided with a blind hole 342, and the blind hole 342 is used for installing a rolling bearing. The rectangular chute The outer end of the bottom surface of 341 is provided with four fourth threaded holes 343, the fifth threaded hole 351 is provided on the described pressure block 35, and the second threaded hole 351 with a larger front section diameter and a smaller rear section diameter is provided on the described stopper 36. The through hole 361 is used to install the rolling bearing. The bottom of the block 36 is provided with four sixth threaded holes 362. The sixth threaded hole 362 on the block 36 is concentric with the fourth threaded hole 343 on the workpiece base 34. and secure by screwing in the screws here. One end of the lead screw 37 is provided with a keyway, the lead screw 37 passes through the fifth threaded hole 351 of the pressing block 35 and rolling bearings are respectively installed at both ends, and the end of the lead screw 37 without a keyway is loaded into the workpiece base In the blind hole 342 of 34, one end of the lead screw 37 with a keyway is loaded into the second through hole 361 of the stopper 36, and the third blind hole 381 with a keyway is opened on the described rotary handle 38. Leading screw 37 leading screw 37 has keyway one end to install key and packs into rotary handle 38 and is provided with the 3rd band keyway blind hole 381, realizes the linkage of rotary handle 38 and leading screw 37.

The clamping mechanism includes a round head bolt 33, a support shaft 31 with a U-shaped groove 312 at the upper end; wherein the support shaft 31 is cylindrical at the lower end, cuboid at the upper end, and has a second cylindrical shape at the lower end. The pin hole 311 has a U-shaped groove 312 on the upper cuboid, and the first rectangular block 41 of the workpiece base 34 is installed in the U-shaped groove 312 of the support shaft 31; the two side walls of the U-shaped groove 312 The first bolt hole 313 with keyway is provided on the top; the round head bolt 33 is sequentially inserted into the first bolt hole 313 with keyway on the side wall of the U-shaped groove 312, and the second keyway on the first rectangular block 41 of the workpiece base 34. After the bolt hole 344 and the first band keyway bolt hole 313 on the other side wall of the U-shaped groove 312, they are fixedly connected by nuts. There are keyways on the described round head bolts 33 for installing keys, so that the workpiece base 34 The first rectangular block 41 at the lower end is fixedly connected with the round head bolt 33 through a key, so as to realize the linkage between the round head bolt 33 and the workpiece base 34 . The clamping mechanism also includes a rectangular fastener 32, and a side wall shaft groove 314 is provided on the side wall surface of the U-shaped groove 312; a rectangular fastener 32 is installed on the side wall shaft groove 314 . The round head bolt 33 has a pointer type resistance sheet jack 331 on the side of the round head, and a first wiring hole 332 is provided on the end face; a bolt hole 321 is arranged on the described rectangular fastener 32, and the described rectangular fastening Part 32 is installed on the side wall shaft groove 314 of support shaft 31, the bolts are screwed into the bolt holes 321 of the rectangular fastener 32 and nuts are screwed on to double fix the workpiece base 34.

The angle display instrument 39 includes a display 391, a pointer type resistor 392 and a U-shaped resistor 393; the inside of the display 391 has a power supply and a conversion circuit, and the wall of the display 391 is provided with two second wiring holes 3911, the display 391 is fixed on the cuboid-shaped side of the upper end of the support shaft 31 by screws; one end of the U-shaped resistance sheet 393 is provided with a third wiring hole 3931; the U-shaped resistance sheet 393 is bonded to the support The U-shaped groove 312 side wall of the shaft 31, the small end of the pointer-type resistance piece 392 is interference-packed into the pointer-type resistance-piece jack 331 of the round head bolt 33 on the clamping mechanism, and the other end is connected with the U-type resistance piece 393 are in contact with each other, and the pointer-type resistance sheet 392 and the U-type resistance sheet 393 are respectively connected to the display 391 through lines. The two second connection holes 3911 of the display 391 are respectively connected with the third connection hole 3931 of the U-shaped resistance sheet 393 and the first connection hole 332 on the end face of the round head bolt 33, and can be connected through the pointer type resistance sheet 392 and the U-shaped resistance sheet 392. The different contact positions of the type resistor sheet 393 cause different resistances to cause changes in current, and then the electrical signal is regulated by the internal conversion circuit of the display 391 and displayed on the display to represent the change in the rotation angle of the workpiece base. The display 391 can be a product of SP5-RSS model of Shenlan Company, but it is not limited thereto.

The upper end surface of the workpiece base 34 is marked with a baseline 42 for the clamping of the elbow 4 along the radial direction. Carry out scribing, then align with the baseline on the workpiece base 34 and clamp.

During installation, the base 1 is first installed, the base 11 is horizontally fixed at a good position, and the thrust ball bearing 13 is concentrically placed on the base 11 .

Next, to install the pipe fitting measuring device 2, first pass the two long shafts 22 through the two first long shaft through holes 211 of the rotating base 21, and then screw the two set screws into the first two sides of the rotating base 21 respectively. In the threaded holes 213, insert the two second rectangular blocks 23 into the two ends of the two long axes 22 respectively through the two second long axis through holes 231 of the long sides, and then screw the two set screws into the threaded holes 213 respectively. In the second threaded holes 233 on the short sides of the two second rectangular blocks 23 . Then two flat keys are respectively installed in the key grooves of two scale shaft supports 24, and then two scale shaft supports 24 are respectively inserted in the first band keyway blind holes 232 of two second rectangular blocks 23, the flat keys on it The key is installed against the keyway, and then two set screws are screwed into the second threaded holes 242 of the two scale shaft brackets 24 respectively. Then two flat keys are installed in the keyways of two scale shafts 25 respectively, and then two scale shafts 25 are inserted respectively in the first band keyway through hole 241 of two scale shaft brackets 24, the flat key on it is opposite Install with keyway. Finally, two flat keys are respectively installed in the key grooves of the cylinder at the lower end of the infrared probe 26, and then the two infrared probes 26 are respectively inserted into the second blind hole 252 with key grooves on the scale shaft 25, with the flat keys on it facing the The keyway is installed, and then the rotating base 21 is concentrically placed on the thrust ball bearing 13.

Finally, to install the pipe fitting positioning device 3, first install the three rolling bearings into the three blind holes 342 of the workpiece base 34 with interference, and then pass the three lead screws 37 through the fifth threaded holes 351 of the three pressing blocks 35 respectively. , and then put them into the three rectangular chute 341 of the workpiece base 34 together, the end of the lead screw without the keyway is loaded into the rolling bearing in the blind hole 342 of the workpiece base 34, and then the three rolling bearings are respectively interference loaded In the second through hole 361 of the three stop blocks 36, then the three stop blocks 36 pass through the end of the three lead screws 37 with keyways through the rolling bearings thereon, and put them into three rectangular chute slots of the workpiece base 34 341, then screws are respectively screwed into the sixth threaded hole 362 on the block 36 and the fourth threaded hole 343 of the workpiece base 34 to fix the block 36, and then three flat keys are respectively installed on the three lead screws 37 In the keyway, then three rotary handles 38 are respectively loaded into the band keyway end of the three leading screws 37 through the third blind hole 381 with keyway on it, and the keyway on it is installed against the flat key. Then the rectangular fastener 32 is installed on the side wall shaft groove 314 of the support shaft 31, and then the first rectangular block 41 at the lower end of the workpiece base 34 is put into the U-shaped groove 312 of the support shaft 31, and the second belt on it The keyway bolt hole 344 is concentric with the first band keyway bolt hole 313 of the support shaft 31, then the flat key is installed in the keyway on the round head bolt 33, and then inserted into the first band keyway pin hole 313 of the support shaft 31 and the workpiece The base 34 is inserted into the second bolt hole 344 with a keyway, and a nut is screwed on the threaded end for fixing the workpiece base 34 . Then the bolt is inserted into the bolt hole 321 of the rectangular fastener 32, and the nut is screwed on to double fix the workpiece base 34, then the support shaft 31 passes through the first through hole 212 of the rotating base 21 and the center hole of the thrust ball bearing 13 Insert into the blind hole 111 of the positioning device on the base 11 , and insert the pin 12 into the first pin hole 112 of the base 1 and the second pin hole 311 of the support shaft 31 . Finally, the angle indicator 39 is installed, and the display 391 is fixed on the cuboid-shaped side at the upper end of the support shaft 31 by screws, and then the U-shaped resistance sheet 393 is fixed on the cuboid-shaped side at the upper end of the support shaft 31 by bonding, and then the The small end of the pointer resistance sheet 392 is interference packed into the pointer type resistance sheet jack 331 of the round head bolt 33 , and its other end is in contact with the U-shaped resistance sheet 393 .

During use, first tighten the set screw on the second rectangular block 23 to fix it on the long axis 22, then the infrared probe 26 is connected to the computer through bluetooth, and the computer will display the distance between the two probes. Then the elbow 4 drawn with the center line is vertically placed on the center position of the workpiece base 34, the center line on it is aligned with the base line 42 on the workpiece base 34, and the position of the three briquetting blocks 35 is adjusted by rotating the lead screw. Clamp and fix the elbow 4. Then two wire two ends are respectively inserted into the second wiring hole 411 of the display 41 and the third wiring hole 431 of the U-shaped resistor sheet 43 and the second wiring hole 411 of the display 41 and the first wiring hole on the end surface of the round head bolt 33 332, connect the display 41, the pointer type resistance sheet 42 and the U-shaped resistance sheet 43, then manually adjust the rotation angle of the workpiece base 34 through the bending angle of the elbow and assist the adjustment by the angle displayed by the display 41, so that The curved section section of the elbow is adjusted to a horizontal position, then the nuts of the round head bolts 33 are tightened, and the nuts of the bolts on the rectangular fastener 32 are tightened to fix the workpiece base. Finally, manually adjust the position of the long axis 22 so that the infrared probes 26 on both sides are roughly symmetrically distributed on the curved section of the elbow 4, then tighten the set screws on both sides of the rotating base 21 to fix the long axis 22, and then Manually adjust the scale shaft 25 to drive the infrared probe 26 on it to the position of the curved section of the elbow, tighten the set screw on the scale shaft bracket 24 to fix the scale shaft 25, and then rotate the measuring device 2 180 degrees to measure the position The maximum diameter d _max and d _min of the cross section, and the data is fed back to the computer, and the ellipticity is calculated by the following ellipticity definition formula.

The formula for defining ellipticity is:

Among them, e is the ellipticity; d _max is the maximum diameter of the cross-section circle; d _min is the minimum diameter of the cross-section circle; d is the original diameter of the cross-section circle before deformation.

The workpiece base of this embodiment can rotate angularly around the support shaft and display the angle of rotation through the rotation angle measuring device, so that the rotation angle of the workpiece base can be adjusted to make the bending of the bent pipes with different bending angles clamped on it The section section is rotated to a horizontal position to facilitate the measurement of ovality here. Second, the scale shaft of the utility model can be pressed and positioned by tightening the set screw on the hollow cylinder, and the outer surface of the scale shaft is provided with a scale for displaying the installation height of the infrared probe, and at the same time, it is beneficial to ensure that the probes on both sides have the same height Thereby, the ellipticity of the cross-section of the bent section of the bent pipe of different lengths can be measured. Thirdly, the cooperation between the rotating base of the utility model and the support shaft belongs to clearance fit, so it can rotate around the support shaft, thereby driving the infrared probes on both sides to rotate 180 degrees around the measured elbow, and then accurately measure The maximum and minimum diameter of the cross-section of the curved section is used to calculate the precise ovality. Fourthly, a thrust ball bearing is installed between the rotating base of the utility model and the base, thereby reducing the frictional resistance of the rotating base during rotation. Fifth, the utility model adopts a modular form, which is convenient to replace parts and has strong versatility.

Claims (9)

1. a kind of bend pipe ellipticity measuring device, which is characterized in that including pedestal (1), pipe fitting ellipticity measurement module (2) With pipe fitting locating module (3)；The pipe fitting ellipticity measurement module (2) includes rotating base (21), scale bracing strut (24), carves Spend axis (25) and infrared probe (26)；Wherein the rotating base (21) is mounted on pedestal (1) by thrust ball bearing (13), It is connected on the rotating base (21) by connector and two scale bracing struts (24), each scale bracing strut (24) be equipped on can up and down adjustment scale axis (25), described scale axis (25) upper end is equipped with infrared probe (26)；Institute Stating pipe fitting locating module (3) includes support shaft (31), workpiece pedestal (34), for measuring workpiece pedestal (34) relative to support shaft (31) angle indicator (39), clamp system and the clamping device of rotation angle；Wherein support shaft (31) upper end with It is connected between workpiece pedestal (34) by clamp system, angle indicator (39) is installed on the clamp system；Described Support shaft (31) lower end is connected after the through-hole at rotating base (21) center with pedestal (1), the workpiece pedestal (34) Upper surface is fixedly installed with bend pipe (4) by clamping device.

2. a kind of bend pipe ellipticity measuring device according to claim 1, which is characterized in that the clamping device packet Include briquetting (35), block (36), lead screw (37) and rotating handle (38)；The workpiece pedestal (34) includes cylindrical block (40), the first rectangular block (41) being connected with cylindrical block (40) bottom surface centre；It is offered on first rectangular block (41) Second band keyway pin hole (344), cylindrical block (40) upper surface of the workpiece pedestal (34) is at least provided with three along circle The equally distributed rectangle sliding slot (341) of circumferential direction, the briquetting (35) are slidably mounted in rectangle sliding slot (341) and are socketed in On lead screw (37), the block (36) is fixed in rectangle sliding slot (341), and the lead screw (37) also supports and is mounted on block (36) on, and the lead screw (37) is equipped with rotating handle (38) across the one end of block (36)；

The clamp system includes the support shaft (31) of ball screw nut (33), upper end with U-type groove (312)；The support The first rectangular block (41) of workpiece pedestal (34) is installed in the U-type groove (312) of axis (31)；The two sides of the U-type groove (312) First band key slot bolt hole (313) is offered on wall surface；The ball screw nut (33) is sequentially inserted into U-type groove (312) side wall First band key slot bolt hole (313), workpiece pedestal (34) the first rectangular block (41) on second band keyway pin hole (344) and Behind the first band key slot bolt hole (313) of U-type groove (312) another side wall, it is connected by nut.

3. a kind of bend pipe ellipticity measuring device according to claim 2, which is characterized in that the clamp system Further include rectangular fastener (32), side wall axial trough (314) are also provided in the side wall surface of the U-type groove (312)；The side Rectangular fastener (32) are installed on wall axial trough (314).

4. a kind of bend pipe ellipticity measuring device according to claim 1, which is characterized in that the angle is shown Instrument (39) includes display (391), pointer type resistor disc (392) and U-shaped resistor disc (393)；The U-shaped resistor disc (393) It is bonded in U-type groove (312) side wall of support shaft (31), described pointer type resistor disc (392) one end is fixed on clamp system On ball screw nut (33), the other end is in contact with U-shaped resistor disc (393), the pointer type resistor disc (392) and U-shaped resistance Piece (393) is connected with display (391) by route respectively.

5. a kind of bend pipe ellipticity measuring device according to claim 1, which is characterized in that the connector includes Long axis (22) and the second rectangular block (23), the long axis (22) pass through the through-hole that rotating base (21) two sides open up and rotation bottom Seat (21) is connected, and described long axis (22) both ends are connected with the second rectangular block (23) respectively, the scale bracing strut (24) It is fixed on the second rectangular block (23).

6. a kind of bend pipe ellipticity measuring device according to claim 1, which is characterized in that the workpiece pedestal (34) baseline (42) of bend pipe (4) clamping is radially portrayed in upper surface.

7. a kind of bend pipe ellipticity measuring device according to claim 1, which is characterized in that the infrared probe (26) also it is connected by bluetooth with computer.

8. a kind of bend pipe ellipticity measuring device according to claim 1, which is characterized in that the scale axis (25) circumferential positioning is realized by key with scale bracing strut (24).

9. a kind of bend pipe ellipticity measuring device according to claim 5, which is characterized in that the scale axis branch The circumferential positioning that frame (24) and the second rectangular block (23) are realized by key.