CN219934927U - Elbow ovality measuring device - Google Patents

Abstract

The utility model provides an ellipticity measuring device for an elbow, which comprises a base, a first positioning mechanism, a second positioning mechanism and a measuring mechanism; the first positioning mechanism is arranged on the base, two first positioning holes are formed in the first positioning mechanism at intervals along the horizontal direction, two straight pipe sections of the bent pipe to be tested are respectively arranged in the two first positioning holes, and the first positioning mechanism is used for enabling the circle centers of the two first positioning holes and the circle centers of the two straight pipe sections to be in a first horizontal plane; the second positioning mechanism is arranged on the base, a second positioning hole is formed in the second positioning mechanism, a bent pipe section of the bent pipe to be tested is arranged in the second positioning hole, and the second positioning mechanism is used for enabling the circle center of the second positioning hole and the circle center of the bent pipe section to be in a second horizontal plane; the measuring mechanism is arranged on the second positioning mechanism and is used for measuring ellipticity of a measuring section of the bent pipe section. The utility model solves the problem that the circle center of the measurement section of the bent pipe and the circle center of the ellipticity measurement equipment cannot be guaranteed to be the same in the prior art.

Description

Elbow ovality measuring device

Technical Field

The utility model relates to the technical field of bent pipe measuring devices, in particular to a bent pipe ellipticity measuring device.

Background

The metal pipe fitting is bent and formed, and a certain bending moment or bending force is applied to the metal pipe fitting to enable the metal pipe fitting to be bent and formed by determining reasonable supporting points and stress points; according to the standard of the bent pipe, the inner wall of the formed bent pipe cannot be provided with obvious crinkles, the outer wall is free from cracks, the ellipticity of the cross section of the bent pipe cannot exceed the requirements or standards of relevant countries and industries, when the ellipticity of the cross section of the bent pipe is measured, the maximum ellipticity of the cross section of the bent pipe is usually detected, and if the maximum ellipticity of the cross section of the bent pipe does not exceed the relevant regulations or requirements, the ellipticity index of the bent pipe is judged to be qualified;

the utility model patent No. 201911296630.7 discloses a metal bent pipe bending forming performance measuring device, and particularly discloses a bent pipe section ovality measuring module and a changeable angle clamping module, wherein the bent pipe section ovality measuring module and the changeable angle clamping module are arranged on a base. The method comprises the steps of installing a changeable angle clamping module and an elbow section ellipticity measuring module on a base, placing a pipe fitting on a pipe fitting positioning device, adjusting the elbow section ellipticity measuring module to measure after adjusting the elbow position to be accurately positioned, and obtaining the distortion degree of the elbow section and the ellipticity of any section through a computer screen connected with an ellipticity measuring instrument on the elbow section ellipticity measuring module. According to the measuring device, the ellipsometer is utilized to carry out circumferential rotation measurement along the measurement section of the bent pipe, the circle center of the measurement section of the bent pipe cannot be ensured to be identical with the circle center of the rotation of the ellipsometer, and further the situation that the measurement section of the bent pipe deviates to one side is caused, so that the situation that the measurement result is inaccurate is caused, and the measuring device is inconvenient to use.

Disclosure of Invention

The utility model mainly aims to provide the elbow ovality measuring device which can strengthen the accuracy of an elbow ovality calculation result and is convenient to use, so that the problem that the measurement result is inaccurate due to the fact that the circle center of the elbow measurement section is not guaranteed to be the same as the circle center of ovality measuring equipment in the prior art is at least solved.

In order to achieve the above purpose, the utility model provides an ellipticity measuring device for an elbow, which comprises a base, a first positioning mechanism, a second positioning mechanism and a measuring mechanism; the first positioning mechanism is arranged on the base, two first positioning holes are formed in the first positioning mechanism at intervals along the horizontal direction, the circle centers of the two first positioning holes are positioned on a first horizontal plane, two straight pipe sections of the bent pipe to be tested are respectively arranged in the two first positioning holes, and the first positioning mechanism is used for enabling the circle centers of the two first positioning holes and the circle centers of the two straight pipe sections to be positioned on the first horizontal plane; the second positioning mechanism is arranged on the base, a second positioning hole is formed in the second positioning mechanism, a bent pipe section of the bent pipe to be tested is arranged in the second positioning hole, and the second positioning mechanism is used for enabling the circle center of the second positioning hole and the circle center of the bent pipe section to be on a second horizontal plane; the measuring mechanism is arranged on the second positioning mechanism and is used for measuring ellipticity of a measuring section of the bent pipe section; when the first horizontal plane and the second horizontal plane are positioned on the same horizontal plane, the circle center of the second positioning hole coincides with the circle center of the measuring section of the bent pipe section, so that the measuring mechanism can obtain accurate ellipticity in measurement.

Further, the first positioning mechanism comprises a first screw, two first brackets, a first driving motor and two first positioning components; the first screw rod is rotatably arranged on the base along a first horizontal straight line direction, the first screw rod is mutually perpendicular to the second positioning hole, the center point of the first screw rod is coplanar with the center of the second positioning hole, and the first screw rod comprises two sections of first thread sections which are equal in length and opposite in screw direction; the two first brackets are arranged on the base in a relatively sliding manner along the first horizontal linear direction, the bottom ends of the two first brackets are respectively provided with a first threaded hole matched with the two first threaded sections and are respectively connected with the two first threaded sections through the first threaded holes; the two first positioning holes are correspondingly formed in the two first brackets; the first driving motor is arranged at one end of the first screw rod and is in driving connection with the first screw rod, and the first driving motor drives the two sections of first thread sections to rotate around different directions so as to drive the two first brackets to synchronously move away from or move close to each other along the axial direction of the first screw rod, so that the distance between the two first positioning holes is matched with the distance between the two straight pipe sections; the two first positioning components are correspondingly arranged on the two first brackets and are opposite to the two first positioning holes, and the first positioning components are used for clamping and positioning the straight pipe section so that the circle center of the first positioning holes and the circle center of the straight pipe section are positioned on a first horizontal plane.

Further, the first positioning assembly comprises a positioning ring, a plurality of positioning sliding plates, a first gear ring and a second driving motor; the positioning ring is fixedly arranged on the side surface of the first bracket and opposite to the first positioning hole, and a plurality of first chute structures which are arranged at intervals along the circumferential direction of the positioning ring and extend along the radial direction of the positioning ring are arranged on the positioning ring; the positioning sliding plates are arranged in the first sliding groove structures in a one-to-one correspondence manner, a sliding column is arranged at the first end of each positioning sliding plate, and a clamping structure is arranged at the second end of each positioning sliding plate; the first gear ring is rotatably arranged on the side surface of the positioning ring, a plurality of driving sliding grooves are formed in the first gear ring at intervals along the circumferential direction of the first gear ring, and the driving sliding grooves are opposite to the sliding columns one by one and are matched with the sliding columns one by one; the second driving motor is arranged on the base and is vertically opposite to the first gear ring, and the second driving motor is used for driving the first gear ring to rotate; the first gear ring is matched with the nesting of the plurality of driving sliding grooves and the plurality of sliding columns to drive the plurality of positioning sliding plates to synchronously slide towards or away from the center of the positioning ring, and the straight pipe section is clamped and positioned through the clamping structure when the plurality of positioning sliding plates synchronously slide towards the center of the positioning ring so that the circle center of the first positioning hole and the circle center of the straight pipe section are positioned on a first horizontal plane.

Further, the driving sliding groove is formed in and penetrates through the thickness direction of the first gear ring, extends from the outer side of the first gear ring to the inner side of the first gear ring by a preset distance, and has a preset radian between the first end and the second end; when the first gear ring rotates, the sliding columns slide between the first ends and the second ends of the driving sliding grooves respectively to drive the positioning sliding plates to synchronously slide towards or away from the center of the positioning ring.

Further, an output shaft of the second driving motor is connected with the first gear ring through a gear transmission mechanism to drive the first gear ring to rotate.

Further, the second positioning mechanism comprises a second bracket and a second positioning assembly; the second bracket is arranged on the base, and the second positioning hole is formed in the second bracket; the second locating component is arranged on the side face of the second support and is used for enabling the circle center of the second locating hole and the circle center of the measuring section of the bent pipe section to be located on a second horizontal plane.

Further, the second positioning component comprises a positioning frame, a second screw rod, two clamping rods and a crank; the locating rack is arranged on the side surface of the second bracket; the second screw rod is rotatably arranged on the positioning frame along a second horizontal straight line, the center lines of the second screw rod and the second positioning hole are mutually perpendicular, the center point of the second screw rod is coplanar with the center of the second positioning hole, and the second screw rod comprises two sections of second thread sections which are equal in length and opposite in screw direction; the two clamping rods are arranged on the positioning frame in a relatively sliding manner along a second horizontal straight line, and are correspondingly provided with second threaded holes matched with the two second threaded sections and are respectively connected with the two second threaded sections through the second threaded holes; the crank is arranged at one end of the second screw rod and is used for driving the two sections of second thread sections to rotate around different directions so as to drive the two clamping rods to synchronously approach to each other or separate from each other along the axial direction of the second screw rod so as to clamp or loosen the measuring section of the bent pipe section; when the two clamping rods tightly clamp the measuring section of the bent pipe section, the circle center of the second positioning hole and the circle center of the measuring section of the bent pipe section are positioned on a second horizontal plane.

Further, a slide bar is arranged on the positioning frame, the clamping bar is of an L-shaped structure, and the clamping bar comprises a moving section and a positioning section; the moving section is slidably arranged on the sliding rod, and the second threaded hole is formed in the moving section and is connected with the second screw rod; the positioning section is vertically arranged at the top of the moving section, and extends a preset distance to the inside of the second positioning hole; the crank drives the two second thread sections to rotate around different directions so that the two moving sections synchronously approach or separate from each other along the axial direction of the second screw rod, and the two positioning sections correspondingly abut against or loosen the measuring section of the bent pipe section.

Further, the measuring mechanism comprises a swivel, a second gear ring, a third driving motor and an ellipticity measuring instrument; the swivel is rotatably arranged on the side surface of the second bracket and is opposite to the second positioning component; the second gear ring is fixedly arranged on the side surface of the swivel; the third driving motor is arranged on the base and is vertically opposite to the second gear ring, and the third driving motor is used for driving the second gear ring to rotate; the ellipticity measuring instrument is arranged on the inner wall of the swivel; wherein the second gear belt drives the swivel to rotate, and the measuring head of the ellipticity measuring instrument rotates along the circumferential direction of the measuring section of the curved pipe section to measure and obtain the ellipticity of the measuring section of the curved pipe section.

Further, a second chute structure extending along a second horizontal straight line is formed on the base, and the second positioning mechanism further comprises a horizontal adjusting block, a third screw rod and an adjusting knob; the horizontal adjusting block is slidably arranged in the second chute structure, a third threaded hole is formed in one end of the horizontal adjusting block, and the second bracket is arranged at the top of the horizontal adjusting block and fixedly connected with the top of the horizontal adjusting block; the third screw rod is rotatably arranged on the base along a second horizontal straight line, and one end of the third screw rod extends into the second chute structure and is in threaded connection with the third threaded hole; the other end of the third screw extends to the outside of the base; the adjusting knob is arranged on a third screw rod outside the base, and the third screw rod is driven to rotate through the adjusting knob, so that the horizontal adjusting block drives the second bracket to conduct linear motion along the axial direction of the third screw rod so as to change the distance between the second bracket and the first positioning mechanism.

The utility model relates to an ellipticity measuring device for a bent pipe, which comprises a base, a first positioning mechanism, a second positioning mechanism and a measuring mechanism; the first positioning mechanism is arranged on the base, two first positioning holes are formed in the first positioning mechanism at intervals along the horizontal direction, the circle centers of the two first positioning holes are positioned on a first horizontal plane, two straight pipe sections of the bent pipe to be tested are respectively arranged in the two first positioning holes, and the first positioning mechanism is used for enabling the circle centers of the two first positioning holes and the circle centers of the two straight pipe sections to be positioned on the first horizontal plane; the second positioning mechanism is arranged on the base, a second positioning hole is formed in the second positioning mechanism, a bent pipe section of the bent pipe to be tested is arranged in the second positioning hole, and the second positioning mechanism is used for enabling the circle center of the second positioning hole and the circle center of the bent pipe section to be on a second horizontal plane; the measuring mechanism is arranged on the second positioning mechanism and is used for measuring ellipticity of a measuring section of the bent pipe section; when the first horizontal plane and the second horizontal plane are positioned on the same horizontal plane, the circle center of the second positioning hole coincides with the circle center of the measuring section of the bent pipe section, so that the measuring mechanism can obtain accurate ellipticity in measurement. The method can strengthen the accuracy of the calculation result of the ellipticity of the bent pipe, is convenient to use, and solves the problem that the inaccurate measurement result can occur because the circle center of the measurement section of the bent pipe cannot be ensured to be the same as the circle center of the ellipticity measurement equipment in the prior art.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is a right side isometric view of an alternative elbow ovality measurement device in accordance with an embodiment of the present utility model;

FIG. 2 is a left side isometric view of an alternative elbow ovality measurement device in accordance with an embodiment of the present utility model;

FIG. 3 is an exploded view of an alternative elbow ovality measurement device in accordance with an embodiment of the present utility model;

FIG. 4 is a schematic view of a first positioning mechanism of an alternative elbow ovality measurement device according to an embodiment of the present utility model;

FIG. 5 is an enlarged schematic view of FIG. 3 at A of an alternative elbow ovality measurement device in accordance with an embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of FIG. 3B of an alternative elbow ovality measurement device in accordance with an embodiment of the present utility model;

FIG. 7 is an enlarged schematic view of FIG. 4 at C of an alternative elbow ovality measurement device in accordance with an embodiment of the present utility model;

fig. 8 is an enlarged schematic view of fig. 4D of an alternative elbow ovality measurement device in accordance with an embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. a base; 20. a first positioning mechanism; 21. a first positioning hole; 22. a first screw; 23. a first bracket; 24. a first driving motor; 25. a first positioning assembly; 251. a positioning ring; 252. a first chute structure; 253. positioning a sliding plate; 254. a spool; 255. a clamping structure; 256. a first gear ring; 257. driving the chute; 258. a second driving motor; 30. a second positioning mechanism; 31. a second positioning hole; 32. a second bracket; 33. a second positioning assembly; 331. a positioning frame; 332. a second screw; 333. a clamping rod; 3331. a moving section; 3332. a positioning section; 334. a crank; 335. a slide bar; 34. a horizontal adjustment block; 35. a third screw; 36. an adjustment knob; 40. a measuring mechanism; 41. a swivel; 42. a second gear ring; 43. a third driving motor; 44. an ellipticity measuring instrument; 50. a second chute structure; 60. a straight pipe section; 70. a curved pipe section.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1 and 2, an ellipticity measuring device for bent pipes comprises a base 10, a first positioning mechanism 20, a second positioning mechanism 30 and a measuring mechanism 40; the first positioning mechanism 20 is arranged on the base 10, two first positioning holes 21 are formed in the first positioning mechanism 20 at intervals along the horizontal direction, the circle centers of the two first positioning holes 21 are located on a first horizontal plane, two straight pipe sections 60 of the bent pipe to be tested are respectively arranged in the two first positioning holes 21, and the first positioning mechanism 20 is used for enabling the circle centers of the two first positioning holes 21 and the circle centers of the two straight pipe sections 60 to be located on the first horizontal plane; the second positioning mechanism 30 is arranged on the base 10, a second positioning hole 31 is arranged on the second positioning mechanism 30, a bent pipe section 70 of the bent pipe to be measured is arranged in the second positioning hole 31, and the second positioning mechanism 30 is used for enabling the circle center of the second positioning hole 31 and the circle center of the bent pipe section 70 to be located on a second horizontal plane; the measuring mechanism 40 is arranged on the second positioning mechanism 30, and the measuring mechanism 40 is used for measuring ellipticity of a measuring section of the bent pipe section 70; when the first horizontal plane and the second horizontal plane are in the same horizontal plane, the center of the second positioning hole 31 coincides with the center of the measuring section of the curved pipe section 70, so that the measuring mechanism 40 can obtain accurate ellipticity. When the utility model is used, the base 10 is fixed on a working area, the two first positioning holes 21 on the first positioning mechanism 20 and the second positioning holes 31 on the second positioning mechanism 30 are adjusted, so that the two straight pipe sections 60 of the bent pipe to be measured are respectively arranged in the two first positioning holes 21, the bent pipe section 70 of the bent pipe to be measured is arranged in the second positioning holes 31, the first positioning mechanism 20 is adjusted to ensure that the circle centers of the two first positioning holes 21 and the circle centers of the two straight pipe sections 60 are positioned on a first horizontal plane, the second positioning mechanism 30 is adjusted to ensure that the circle centers of the second positioning holes 31 and the circle centers of the bent pipe sections 70 are positioned on a second horizontal plane, and when the operation is finished, the first horizontal plane and the second horizontal plane are positioned on the same horizontal plane even if the circle centers of the second positioning holes 31 are coincident with the circle centers of the measurement sections of the bent pipe sections 70.

As an optimization scheme of the present utility model, as shown in fig. 1, 2 and 4, the first positioning mechanism 20 includes a first screw 22, two first brackets 23, a first driving motor 24 and two first positioning components 25; the first screw rod 22 is rotatably arranged on the base 10 along a first horizontal straight line direction, the first screw rod 22 and the second positioning hole 31 are mutually perpendicular, the center point of the first screw rod 22 is coplanar with the center of the second positioning hole 31, and the first screw rod 22 comprises two sections of first thread sections which are equal in length and opposite in spiral direction; the two first brackets 23 are arranged on the base 10 in a relatively sliding manner along the first horizontal linear direction, and the bottom ends of the two first brackets 23 are respectively provided with first threaded holes matched with the two first threaded sections and are respectively connected with the two first threaded sections through the first threaded holes; the two first positioning holes 21 are correspondingly formed on the two first brackets 23; the first driving motor 24 is arranged at one end of the first screw 22 and is in driving connection with the first screw 22, and the first driving motor 24 drives the two sections of first thread sections to rotate around different directions so as to drive the two first brackets 23 to synchronously move away from or move close to each other along the axial direction of the first screw 22, so that the distance between the two first positioning holes 21 is matched with the distance between the two straight pipe sections 60; the two first positioning assemblies 25 are correspondingly arranged on the two first brackets 23 and are opposite to the two first positioning holes 21, and the first positioning assemblies 25 are used for clamping and positioning the straight pipe section 60 so that the circle center of the first positioning holes 21 and the circle center of the straight pipe section 60 are located on a first horizontal plane. Preferably, the first positioning mechanism 20 further comprises a fixing frame, the first screw 22 is disposed between the top parts of two ends of the fixing frame, and two smooth moving rods arranged at intervals along the vertical direction are further disposed between the two ends of the fixing frame.

Preferably, the whole plate structure that has preset thickness of first support 23, the upper portion of first support 23 is the semicircle structure, the lower part of first support 23 is the cuboid structure, first locating hole 21 has been seted up to the upper portion semicircle department of first support 23, first support 23's lower cuboid along first screw rod 22 length direction seted up with first screw rod 22 assorted screw and rather than interconnect, first support 23's lower cuboid still has seted up two slide hole and rather than slidable connection with smooth movable rod assorted slide hole along first screw rod 22 length direction, smooth movable rod and slide hole cooperation can guarantee that first support 23 stably removes and can not rock.

Preferably, the first driving motor 24 may be used to drive the two first thread segments to rotate around different directions, or a grip may be mounted on one end of the first screw 22, and the rotation of the first screw 22 may be controlled by the rotation of the grip. When the handle is used to rotate and control the first screw 22 to rotate, preferably, a graduated scale is further arranged on the fixing frame, the graduated scale is higher than the first screw 22 and is parallel to the first screw 22, and the distance between the two first positioning holes 21 can be accurately controlled through the reading of the graduated scale.

As an optimization of the present utility model, as shown in fig. 4, 7 and 8, the first positioning assembly 25 includes a positioning ring 251, a plurality of positioning slide plates 253, a first gear ring 256 and a second driving motor 258; the positioning ring 251 is fixedly arranged on the side surface of the first bracket 23 and opposite to the first positioning hole 21, and a plurality of first chute structures 252 which are arranged at intervals along the circumferential direction of the positioning ring 251 and extend along the radial direction of the positioning ring 251 are arranged; the positioning sliding plates 253 are arranged in the first sliding groove structures 252 in a one-to-one correspondence manner, sliding columns 254 are arranged at first ends of the positioning sliding plates 253, and clamping structures 255 are arranged at second ends of the positioning sliding plates 253; the first gear ring 256 is rotatably disposed on a side surface of the positioning ring 251, and a plurality of driving sliding grooves 257 are formed in the first gear ring 256 and are arranged at intervals along the circumferential direction of the first gear ring, and the driving sliding grooves 257 are opposite to the sliding columns 254 one by one and are matched with each other; the second driving motor 258 is disposed on the base 10 and is opposite to the first gear ring 256 from top to bottom, and the second driving motor 258 is used for driving the first gear ring 256 to rotate; the first gear ring 256 is engaged with the plurality of driving sliding grooves 257 and the plurality of sliding columns 254 to drive the plurality of positioning sliding plates 253 to slide synchronously towards or away from the center of the positioning ring 251, and the plurality of positioning sliding plates 253 clamp and position the straight pipe section 60 through the clamping structure 255 when sliding synchronously towards the center of the positioning ring 251 so that the center of the first positioning hole 21 and the center of the straight pipe section 60 are located on a first horizontal plane. The driving sliding chute 257 is formed and penetrates through the first gear ring 256 in the thickness direction, the driving sliding chute 257 extends from the outer side of the first gear ring 256 to the inner side of the first gear ring 256 by a preset distance, and a preset radian is formed between the first end and the second end of the driving sliding chute 257; wherein, the sliding columns 254 are inserted into the first ends of the driving sliding grooves 257, and when the first gear ring 256 rotates, the sliding columns 254 slide between the first ends and the second ends of the driving sliding grooves 257 respectively to drive the positioning sliding plates 253 to slide towards or away from the center of the positioning ring 251 synchronously. Preferably, the first slide groove structure 252 should be a smooth structure with a suitable fit clearance between the first slide groove structure 252 and the positioning slide plate 253 so that the positioning slide plate 253 can be driven to slide within the first slide groove structure 252.

Preferably, the clamping structure 255 is an arc structure extending from two sides of one end of the positioning sliding plate 253, and the curvature of the arc structure of the clamping structure 255 is the same as that of the first positioning hole 21.

Preferably, a preset arc is formed between the first end and the second end of the driving sliding chute 257, and the driving sliding chute 257 gradually gathers from the outer side of the first gear ring 256 to the inner side of the first gear ring 256 to have a self-locking effect, so that when the positioning sliding plates 253 slide towards the center of the positioning ring 251 synchronously, the positioning sliding plates 253 slide out of the first sliding chute structure 252 away from the center of the positioning ring 251.

As an optimized solution of the present utility model, as shown in fig. 7, the output shaft of the second driving motor 258 is connected to the first gear ring 256 through a gear transmission mechanism to drive the first gear ring 256 to rotate. Preferably, the second driving motor 258 is disposed at a lower portion of the first bracket 23; the first end of the first transmission rod is arranged on the second driving motor 258; the first gear is rotatably arranged at the second end of the first transmission rod, and the first gear is mutually abutted with the bottom of the first gear ring; the second driving motor 258 drives the first driving rod to rotate the first gear, and the first gear is meshed with the first gear ring to rotate the first gear ring 256.

As an optimization scheme of the present utility model, as shown in fig. 3, the second positioning mechanism 30 includes a second bracket 32 and a second positioning assembly 33; the second bracket 32 is arranged on the base 10, and the second positioning hole 31 is formed on the second bracket 32; the second positioning assembly 33 is disposed on a side of the second bracket 32, and the second positioning assembly 33 is configured to enable a center of the second positioning hole 31 and a center of the measuring section of the curved pipe section 70 to be located on a second horizontal plane. Preferably, the second bracket 32 is integrally of a plate structure with a preset thickness, the upper part of the second bracket 32 is of a semicircular structure, the lower part of the second bracket 32 is of a cuboid structure, and the semicircular part of the upper part of the second bracket 32 is provided with a second positioning hole 31.

As an optimization scheme of the present utility model, as shown in fig. 3 and 5, the second positioning assembly 33 includes a positioning frame 331, a second screw 332, two clamping rods 333, and a crank 334; the positioning frame 331 is disposed on a side surface of the second bracket 32; the second screw rod 332 is rotatably installed on the positioning frame 331 along a second horizontal straight line, the second screw rod 332 is perpendicular to the central line of the second positioning hole 31, the central point of the second screw rod 332 is coplanar with the center of the second positioning hole 31, and the second screw rod 332 comprises two sections of second thread sections with equal length and opposite spiral directions; the two clamping rods 333 are relatively slidably arranged on the positioning frame 331 along a second horizontal straight line, and the two clamping rods 333 are correspondingly provided with second threaded holes matched with the two second threaded sections and are respectively connected with the two second threaded sections through the second threaded holes; the crank 334 is arranged at one end of the second screw 332, and the crank 334 is used for driving the two second thread sections to rotate around different directions so as to drive the two clamping rods 333 to synchronously approach to each other or separate from each other along the axial direction of the second screw 332 so as to clamp or unclamp the measuring section of the bent pipe section 70; when the two clamping rods 333 tightly clamp the measuring section of the curved pipe section 70, the center of the second positioning hole 31 and the center of the measuring section of the curved pipe section 70 are located on the second horizontal plane. Preferably, the crank 334 may be used to drive the two second threaded sections to rotate in different directions, or the drive motor may be used to control the two second threaded sections to rotate in different directions.

As an optimization scheme of the utility model, as shown in fig. 3 and 5, a slide bar 335 is arranged on a positioning frame 331, a clamping bar 333 is in an L-shaped structure, and the clamping bar 333 comprises a moving section 3331 and a positioning section 3332; the moving section 3331 is slidably mounted on the slide rod 335, and a second threaded hole is formed in the moving section 3331 and is connected with the second screw 332; the positioning section 3332 is vertically arranged at the top of the moving section 3331, and the positioning section 3332 extends a preset distance into the second positioning hole 31; the crank 334 drives the two second threaded sections to rotate around different directions so that the two moving sections 3331 synchronously approach or separate from each other along the axial direction of the second screw 332, and the two positioning sections 3332 correspondingly abut or loosen the measuring section of the bent pipe section 70. Preferably, the positioning section 3332 extends a predetermined distance into the second positioning hole 31, one end of the positioning section 3332 extending into the second positioning hole 31 is provided with a positioning head, the positioning head is perpendicular to the positioning section 3332, and the two positioning heads correspondingly abut against or loosen the measuring section of the bend section 70.

As an optimization of the present utility model, as shown in fig. 3 and 6, the measuring mechanism 40 includes a swivel 41, a second gear ring 42, a third driving motor 43, and an ellipticity measuring instrument 44; the swivel 41 is rotatably installed at a side of the second bracket 32 and opposite to the second positioning assembly 33; the second gear ring 42 is fixedly arranged on the side surface of the swivel 41; the third driving motor 43 is disposed on the base 10 and vertically opposite to the second gear ring 42, and the third driving motor 43 is used for driving the second gear ring 42 to rotate; an ellipticity measuring instrument 44 is provided on the inner wall of the swivel 41; wherein the second gear ring 42 rotates the swivel 41, and the measuring head of the ellipticity measuring instrument 44 rotates along the circumferential direction of the measuring section of the curved pipe section 70 to measure the ellipticity of the measuring section of the curved pipe section 70. Preferably, the swivel 41 has a fixed surface and a rotating surface, the fixed surface of the swivel 41 abuts against the side surface of the second bracket 32, and the rotating surface of the swivel 41 abuts against the second gear ring 42.

As an optimization scheme of the utility model, as shown in fig. 3, a second chute structure 50 extending along a second horizontal straight line is provided on the base 10, and the second positioning mechanism 30 further includes a horizontal adjusting block 34, a third screw 35 and an adjusting knob 36; the horizontal adjusting block 34 is slidably arranged in the second chute structure 50, a third threaded hole is formed in one end of the horizontal adjusting block 34, and the second bracket 32 is arranged at the top of the horizontal adjusting block 34 and fixedly connected with the horizontal adjusting block; the third screw rod 35 is rotatably arranged on the base 10 along a second horizontal straight line, and one end of the third screw rod 35 extends into the second chute structure 50 and is in threaded connection with the third threaded hole; the other end of the third screw 35 extends to the outside of the base 10; the adjusting knob 36 is arranged on the third screw rod 35 outside the base 10, the adjusting knob 36 drives the third screw rod 35 to rotate, the horizontal adjusting block 34 drives the second bracket 32 to perform linear motion along the axial direction of the third screw rod 35 so as to change the distance between the second bracket 32 and the first positioning mechanism 20, the horizontal adjusting block 34 drives the second bracket 32 to approach the first positioning mechanism 20 along the axial direction of the third screw rod 35, and the arc radian formed between the two first positioning holes 21 and the second positioning holes 31 is smaller than the bent pipe section of the bent pipe to be tested so as to facilitate the two straight pipe sections 60 of the bent pipe to be tested to be respectively arranged in the two first positioning holes 21 and the bent pipe section 70 of the bent pipe to be tested to be arranged in the second positioning holes 31.

When the utility model is used, the base 10 is fixed on a working area, the first driving motor 24 drives the two sections of first thread sections to rotate around different directions so as to drive the two first brackets 23 to synchronously move away from or close to each other along the axial direction of the first screw 22, so that the distance between the two first positioning holes 21 is matched with the distance between the two straight pipe sections 60, one straight pipe section 60 of the bent pipe to be tested is firstly arranged in one first positioning hole 21, the third screw 35 is driven to rotate through the adjusting knob 36, the horizontal adjusting block 34 drives the second bracket 32 to move close to the first positioning mechanism 20 along the axial direction of the third screw 35, so that the bent pipe section 70 of the bent pipe to be tested is conveniently arranged in the second positioning hole 31, the other straight pipe section 60 of the bent pipe to be tested is arranged in the other first positioning hole 21, the second bracket 32 is further away from the first positioning mechanism 20 along the axial direction of the third screw 35 to reach a preset position, the bent pipe section 70 of the bent pipe to be measured is positioned through the second positioning mechanism 30, the crank 334 drives the two second threaded sections to rotate around different directions so as to enable the two moving sections 3331 to synchronously approach each other along the axial direction of the second screw 332, the two positioning sections 3332 correspondingly abut against the measuring section of the bent pipe section 70, when the two positioning sections 3332 tightly clamp the measuring section of the bent pipe section 70, the circle center of the second positioning hole 31 and the circle center of the measuring section of the bent pipe section 70 are positioned on a second horizontal plane, the two straight pipe sections 60 are positioned through the first positioning component 25, the second driving motor 258 drives the first gear ring 256 to rotate, the first gear ring 256 drives the plurality of positioning sliding plates 253 to synchronously slide towards the center of the positioning ring 251 through the nesting cooperation of the plurality of driving sliding grooves 257 and the plurality of sliding columns 254, the plurality of positioning sliding plates 253 synchronously slide toward the center of the positioning ring 251 to clamp and position the straight pipe section 60 by the clamping structure 255 such that the center of the first positioning hole 21 and the center of the straight pipe section 60 are on the first horizontal plane, and when the above operation is completed, the first horizontal plane and the second horizontal plane will be on the same horizontal plane even if the center of the second positioning hole 31 coincides with the center of the measuring section of the curved pipe section 70, the third driving motor 43 drives the second gear ring 42 to rotate, the second gear ring 42 drives the rotating ring 41 to rotate, and the measuring head of the ellipticity gauge 44 rotates along the circumferential direction of the measuring section of the curved pipe section 70 to measure and obtain the maximum outer diameter and the minimum outer diameter of the measuring section of the curved pipe section 70, and the ellipticity of the measuring section of the curved pipe section 70 is measured according to the formula of "ellipticity= (maximum outer diameter-minimum outer diameter)/nominal outer diameter x 100%". The method can strengthen the accuracy of the calculation result of the ellipticity of the bent pipe, is convenient to use, and solves the problem that the circle center of the measurement section of the bent pipe cannot be ensured to be the same as the circle center of the ellipticity measuring equipment in the prior art.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. An elbow ovality measuring device, comprising:

a base (10);

the device comprises a base (10), a first positioning mechanism (20) and a second positioning mechanism (20), wherein the first positioning mechanism (20) is arranged on the base (10), two first positioning holes (21) are formed in the first positioning mechanism along the horizontal direction at intervals, the circle centers of the two first positioning holes (21) are located on a first horizontal plane, two straight pipe sections (60) of a bent pipe to be tested are respectively arranged in the two first positioning holes (21), and the first positioning mechanism (20) is used for enabling the circle centers of the two first positioning holes (21) and the circle centers of the two straight pipe sections (60) to be located on the first horizontal plane;

the second positioning mechanism (30), the second positioning mechanism (30) is arranged on the base (10), a second positioning hole (31) is formed in the second positioning mechanism (30), a bent pipe section (70) of the bent pipe to be tested is arranged in the second positioning hole (31), and the second positioning mechanism (30) is used for enabling the circle center of the second positioning hole (31) and the circle center of the bent pipe section (70) to be on a second horizontal plane;

a measuring mechanism (40), the measuring mechanism (40) being arranged on the second positioning mechanism (30), the measuring mechanism (40) being used for measuring the ellipticity of a measuring section of the curved pipe section (70);

when the first horizontal plane and the second horizontal plane are in the same horizontal plane, the circle center of the second positioning hole (31) coincides with the circle center of the measuring section of the bent pipe section (70) so that the measuring mechanism (40) can obtain accurate ellipticity in measurement.

2. The elbow ovality measurement device according to claim 1, wherein said first positioning mechanism (20) comprises:

the first screw (22) is rotatably arranged on the base (10) along a first horizontal straight line direction, the first screw (22) and the second positioning hole (31) are mutually perpendicular, the center point of the first screw (22) and the center of the second positioning hole (31) are coplanar, and the first screw (22) comprises two sections of first thread sections which are equal in length and opposite in spiral direction;

the two first brackets (23) are arranged on the base (10) in a relatively sliding manner along the first horizontal straight line direction, and first threaded holes matched with the two sections of the first thread sections are respectively formed in the bottom ends of the two first brackets (23) and are respectively connected with the two sections of the first thread sections through the first threaded holes; the two first positioning holes (21) are correspondingly formed in the two first brackets (23);

the first driving motor (24) is arranged at one end of the first screw rod (22) and is in driving connection with the first screw rod (22), the first driving motor (24) drives two sections of first thread sections to rotate around different directions so as to drive two first brackets (23) to synchronously move away from each other or move close to each other along the axial direction of the first screw rod (22) so that the distance between two first positioning holes (21) is matched with the distance between two straight pipe sections (60);

the two first positioning assemblies (25), two first positioning assemblies (25) are correspondingly arranged on the two first supports (23) and are opposite to the two first positioning holes (21), and the first positioning assemblies (25) are used for clamping and positioning the straight pipe sections (60) so that the circle centers of the first positioning holes (21) and the circle centers of the straight pipe sections (60) are located on the first horizontal plane.

3. The elbow ovality measurement device according to claim 2, characterized in that said first positioning assembly (25) comprises:

the positioning ring (251), the positioning ring (251) is fixedly arranged on the side surface of the first bracket (23) and is opposite to the first positioning hole (21), and a plurality of first chute structures (252) which are arranged at intervals along the circumferential direction of the positioning ring (251) and extend along the radial direction of the positioning ring;

the positioning sliding plates (253) are arranged in the first sliding groove structures (252) in a one-to-one correspondence manner, sliding columns (254) are arranged at the first ends of the positioning sliding plates (253), and clamping structures (255) are arranged at the second ends of the positioning sliding plates (253);

the first gear ring (256), the first gear ring (256) is rotatably arranged on the side surface of the positioning ring (251), a plurality of driving sliding grooves (257) are formed in the first gear ring (256) at intervals along the circumferential direction of the first gear ring, and the driving sliding grooves (257) are opposite to the sliding columns (254) one by one and are matched with one another;

a second driving motor (258), wherein the second driving motor (258) is arranged on the base (10) and is opposite to the first gear ring (256) up and down, and the second driving motor (258) is used for driving the first gear ring (256) to rotate;

the first gear ring (256) is matched with the driving sliding grooves (257) and the sliding columns (254) in a nesting mode to drive the positioning sliding plates (253) to synchronously slide towards or away from the center of the positioning ring (251), and the straight pipe section (60) is clamped and positioned through the clamping structure (255) when the positioning sliding plates (253) synchronously slide towards the center of the positioning ring (251) so that the circle center of the first positioning hole (21) and the circle center of the straight pipe section (60) are located on a first horizontal plane.

4. The elbow ovality measuring device of claim 3,

the driving sliding groove (257) is formed in and penetrates through the first gear ring (256) in the thickness direction, the driving sliding groove (257) extends from the outer side of the first gear ring (256) to the inner side of the first gear ring (256) for a preset distance, and a preset radian is arranged between the first end and the second end of the driving sliding groove (257);

wherein, the sliding columns (254) are inserted into the first ends of the driving sliding grooves (257), when the first gear ring (256) rotates, the sliding columns (254) slide between the first ends and the second ends of the driving sliding grooves (257) respectively so as to drive the positioning sliding plates (253) to synchronously slide towards or away from the center of the positioning ring (251).

5. A bent-tube ovality measuring device according to claim 3, characterized in that the output shaft of the second drive motor (258) is connected with the first gear ring (256) by means of a gear transmission for driving the first gear ring (256) in rotation.

6. The elbow ovality measurement device according to claim 1, wherein said second positioning mechanism (30) comprises:

the second support (32), the said second support (32) is set up on the said base (10), the said second locating hole (31) opens on the said second support (32);

the second positioning assembly (33), the second positioning assembly (33) set up in the side of second support (32), second positioning assembly (33) are used for making the centre of a circle of second locating hole (31) with the centre of a circle of the measuring section of curved tube section (70) is in on the second horizontal plane.

7. The elbow ovality measurement device according to claim 6, wherein said second positioning assembly (33) comprises:

the positioning frame (331) is arranged on the side surface of the second bracket (32);

the second screw rod (332) is rotatably arranged on the positioning frame (331) along a second horizontal straight line, the second screw rod (332) is perpendicular to the central line of the second positioning hole (31), the central point of the second screw rod (332) is coplanar with the central point of the second positioning hole (31), and the second screw rod (332) comprises two sections of second thread sections with equal length and opposite spiral directions;

the two clamping rods (333) are arranged on the locating frame (331) in a relatively sliding manner along the second horizontal straight line, and the two clamping rods (333) are correspondingly provided with second threaded holes matched with the two sections of the second threaded sections and are respectively connected with the two sections of the second threaded sections through the second threaded holes;

the crank (334) is arranged at one end of the second screw (332), and the crank (334) is used for driving the two sections of the second thread sections to rotate around different directions so as to drive the two clamping rods (333) to synchronously approach to each other or separate from each other along the axial direction of the second screw (332) so as to clamp or unclamp the measuring section of the bent pipe section (70);

when the two clamping rods (333) tightly clamp the measuring section of the bent pipe section (70), the circle center of the second positioning hole (31) and the circle center of the measuring section of the bent pipe section (70) are positioned on a second horizontal plane.

8. The elbow ovality measuring device according to claim 7, wherein a sliding rod (335) is provided on the positioning frame (331), the clamping rod (333) is of an "L" type structure, and the clamping rod (333) comprises:

a moving section (3331), wherein the moving section (3331) is slidably mounted on the slide rod (335), and the second threaded hole is formed in the moving section (3331) and is connected with a second screw (332);

the positioning section (3332), the positioning section (3332) is vertically arranged at the top of the moving section (3331), and the positioning section (3332) extends a preset distance to the inside of the second positioning hole (31);

the crank (334) drives two sections of the second threaded sections to rotate around different directions so that the two moving sections (3331) synchronously approach or separate from each other along the axial direction of the second screw (332), and the two positioning sections (3332) correspondingly abut against or loosen the measuring section of the bent pipe section (70).

9. The elbow ovality measurement device according to claim 6, wherein said measurement mechanism (40) comprises:

a swivel (41), the swivel (41) being rotatably mounted to a side of the second bracket (32) and opposite the second positioning assembly (33);

a second gear ring (42), wherein the second gear ring (42) is fixedly arranged on the side surface of the swivel (41);

a third driving motor (43), wherein the third driving motor (43) is arranged on the base (10) and is opposite to the second gear ring (42) up and down, and the third driving motor (43) is used for driving the second gear ring (42) to rotate;

an ellipticity measuring instrument (44), the ellipticity measuring instrument (44) being arranged on the inner wall of the swivel (41);

the second gear ring (42) drives the swivel (41) to rotate, and the measuring head of the ellipticity measuring instrument (44) rotates along the circumferential direction of the measuring section of the bent pipe section (70) so as to measure and obtain the ellipticity of the measuring section of the bent pipe section (70).

10. The elbow ovality measuring device according to claim 6, wherein said base (10) is provided with a second chute structure (50) extending along a second horizontal straight line, and wherein said second positioning mechanism (30) further comprises:

the horizontal adjusting block (34), the horizontal adjusting block (34) is slidably arranged in the second chute structure (50), a third threaded hole is formed in one end of the horizontal adjusting block (34), and the second bracket (32) is arranged at the top of the horizontal adjusting block (34) and fixedly connected with the top of the horizontal adjusting block;

a third screw rod (35), wherein the third screw rod (35) is rotatably arranged on the base (10) along the second horizontal straight line, and one end of the third screw rod (35) extends into the second chute structure (50) and is in threaded connection with the third threaded hole; the other end of the third screw rod (35) extends to the outside of the base (10);

the adjusting knob (36) is arranged on the third screw rod (35) outside the base (10), the third screw rod (35) is driven to rotate through the adjusting knob (36), so that the horizontal adjusting block (34) drives the second bracket (32) to perform linear motion along the axial direction of the third screw rod (35) so as to change the distance between the second bracket (32) and the first positioning mechanism (20).