阅读说明：本技术 一种管接头偏差辅助测量装置 (Pipe joint deviation auxiliary measuring device ) 是由 解胜飞 解伟 魏冬 于 2021-09-29 设计创作，主要内容包括：本发明涉及一种管接头偏差辅助测量装置,包括支座,支座中竖直滑动安装高度杆,支座与高度杆之间设有第一防转锁定机构,纵向标尺、转套、角度转盘通过轴套套设在高度杆上,转套、轴套、高度杆之间设有第一滑动锁定机构,高度杆上滑动安装角度标尺,高度杆与角度标尺之间设有第二防转锁定机构。本发明1、整体结构简单紧凑,占用空间小,制造组装维护方便；2、支座、卡脚采用对称V形槽结构进行基准对中找中,校准定位准确,加工操作便利；3、高度杆与支座、角度游标采用圆柱形加对称双V形滑槽和手动锥端螺钉锁定结构,对中性好,滑动平稳,定位准确。(The invention relates to a pipe joint deviation auxiliary measuring device which comprises a support, wherein a height rod is vertically and slidably mounted in the support, a first anti-rotation locking mechanism is arranged between the support and the height rod, a longitudinal scale, a rotating sleeve and an angle turntable are sleeved on the height rod through a shaft sleeve, the first anti-rotation locking mechanism is arranged among the rotating sleeve, the shaft sleeve and the height rod, the angle scale is slidably mounted on the height rod, and a second anti-rotation locking mechanism is arranged between the height rod and the angle scale. The invention 1 has simple and compact integral structure, small occupied space and convenient manufacture, assembly and maintenance; 2. the support and the clamping pin adopt a symmetrical V-shaped groove structure to perform reference centering and centering, the calibration and positioning are accurate, and the processing operation is convenient; 3. the height rod, the support and the angle vernier are in a cylindrical and symmetrical double-V-shaped sliding groove and manual taper end screw locking structure, centering performance is good, sliding is stable, and positioning is accurate.)

1. The auxiliary measuring device for the pipe joint deviation is characterized by comprising a support (1), a height rod (3) is vertically installed in the support (1) in a sliding mode, a first anti-rotation locking mechanism is arranged between the support (1) and the height rod (3), a longitudinal scale (4), a rotating sleeve (12) and an angle rotary table (5) are sleeved on the height rod (3) through a shaft sleeve (13), the first anti-rotation locking mechanism is arranged between the rotating sleeve (12), the shaft sleeve (13) and the height rod (3), an angle scale (6) is installed on the height rod (3) in a sliding mode, a second anti-rotation locking mechanism is arranged between the height rod (3) and the angle scale (6), clamping feet (18) and longitudinal cursors (19) are installed on the longitudinal scale (4) in a sliding mode, and the clamping feet (18) are arranged on two sides of the longitudinal cursors (19) in pairs; the clamp feet (18) are hinged with one end of the side connecting plate (17), the longitudinal vernier (19) is hinged with the middle part of the middle connecting plate (20), and the other ends of the side connecting plates (17) which are arranged in pairs are hinged with the two ends of the middle connecting plate (20); a second sliding locking mechanism is arranged between the longitudinal vernier (19) and the longitudinal scale (4); the height rod (3), the longitudinal scale (4) and the longitudinal vernier (19) are provided with length numerical value scribes, the angle turntable (5) is provided with angle numerical value scribes, and the angle scale (6) is provided with angle vernier numerical value scribes.

2. The auxiliary measuring device for the pipe joint deviation according to claim 1, wherein the shaft sleeve (13) is fixed with the longitudinal scale (4), the rotating sleeve (12) and the angle rotary table (5) through interference fit, the shaft sleeve (13) is in clearance fit with the height rod (3), the shaft sleeve (13) can slide and rotate on the height rod (3), and the longitudinal scale (4), the rotating sleeve (12) and the angle rotary table (5) are fixed into a whole through a third countersunk head screw 14 and a first countersunk head screw 7.

3. The auxiliary measuring device for the pipe joint deviation according to claim 1, wherein the lower part of the support (1) is provided with a longitudinal positioning part, the longitudinal positioning part is of an inverted symmetrical V-shaped structure, the center of the support (1) is provided with a height rod sliding hole, and the central axis of the circular hole is perpendicular to the longitudinal symmetrical center line of the longitudinal positioning part.

4. Auxiliary measuring device for pipe joint deviations according to claim 1, characterized in that the height bar (3) is provided with centering graduations (3-1) on its lower end, coinciding with the centre axis of the height bar (3), and on its outer side with a height numerical scale plane (3-3), the lowermost end being a 0-line reference.

5. The auxiliary measuring device for the pipe joint deviation according to claim 1, wherein the first anti-rotation locking mechanism comprises a first anti-rotation sliding groove, a first locking groove, a first anti-rotation screw (2) and a first locking screw (15), the two sides of the height rod (3) are respectively provided with the through-long first anti-rotation sliding groove and the first locking groove, the two sides of the support (1) are respectively provided with the first anti-rotation screw (2) and the first locking screw (15) in a threaded manner, and the tail part of the first anti-rotation screw (2) and the tail part of the first locking screw (15) are respectively positioned in the first anti-rotation sliding groove and the first locking groove; the first anti-rotation sliding groove and the tail part of the first anti-rotation screw (2) are in a matched V shape; the first locking groove and the tail part of the first locking screw (15) are in a matched V shape.

6. The pipe joint deviation auxiliary measuring device according to claim 1, wherein the first sliding locking mechanism comprises a sliding locking screw (16), and a threaded hole is formed in the periphery of the rotating sleeve (12) for mounting the sliding locking screw (16) to penetrate through the shaft sleeve (13) to abut against the height rod (3).

7. The auxiliary pipe joint deviation measuring device as claimed in claim 1, wherein the longitudinal scale (4) is in a round head plate-shaped structure, the length value scale line is arranged on the plane of the longitudinal scale (4), and the clamping foot (18) and the longitudinal vernier (19) are slidably mounted on the longitudinal scale (4) through a dovetail groove structure.

8. The auxiliary measuring device for the pipe joint deviation according to claim 1, wherein the lower part of the clamping foot (18) is provided with a pipe joint excircle bayonet which is in a symmetrical V-shaped groove structure; a vernier dovetail groove is formed in the longitudinal vernier (19), a vernier second inlaid strip (29) is arranged on the side wall of the vernier dovetail groove, a reading window is formed in one side of the vernier dovetail groove, the lower edge of the window is a vernier numerical slope, a vernier numerical scale line is arranged on the vernier numerical slope, and the vernier numerical scale line is obliquely aligned with the length numerical scale line of the longitudinal scale (4); the clamping foot (18) and the longitudinal vernier (19) adopt a split structure; the second sliding locking mechanism is a sliding locking pin shaft screw (31), the longitudinal vernier (19) is in threaded connection with the sliding locking pin shaft screw (31), and the sliding locking pin shaft screw (31) is hinged to the middle of the middle connecting plate (20) and abuts against the longitudinal scale (4).

9. The auxiliary measuring device for the pipe joint deviation according to claim 5, characterized in that the second anti-rotation locking mechanism comprises a sliding sleeve (9), the sliding sleeve (9) is slidably mounted on the height rod (3), and the bottom of the sliding sleeve (9) is fixedly connected with the angle scale (6) through a second countersunk screw 11; a second anti-rotation screw (8) and a second locking screw (10) are respectively installed on two sides of the sliding sleeve (9) in a threaded mode, and the tail portion of the second anti-rotation screw (8) and the tail portion of the second locking screw (10) are respectively located in a first anti-rotation sliding groove and a first locking groove of the full length of the height rod (3); the tail part of the second anti-rotation screw (8) and the first anti-rotation sliding groove of the height rod (3) are in a matched V shape; the tail part of the second locking screw (10) and the first locking groove of the height rod (3) are in a matched V shape.

10. The auxiliary measuring device for pipe joint deviation according to claim 1, characterized in that the angle rotary table (5) adopts a round head plate-shaped structure, the edge of a plane great arc on the angle rotary table (5) is provided with an angle numerical scale line symmetrical to a 0-position reference line, and the 0-position reference line is vertical to the length center line of the longitudinal scale (4); the angle scale (6) is positioned above the angle turntable (5), the angle scale (6) adopts a round-head plate-shaped structure, and the radius of the edge of a large circular arc on the upper plane of the angle scale (6) is smaller than that of the edge of the large circular arc on the upper plane of the angle turntable (5); the edge of a large circular arc on the upper plane of the angle scale (6) is provided with a scale inclined plane (6-1), the scale inclined plane (6-1) is provided with an angle vernier value reticle which is symmetrical to the 0-position datum line, and the angle vernier value reticle is obliquely aligned to the angle numerical reticle of the angle turntable (5); the 0-position datum line of the angle vernier numerical reticle of the angle scale (6) is vertical to the longitudinal symmetrical center line of the lower longitudinal positioning part of the support (1).

Technical Field

The invention belongs to the technical field of measurement and relates to an auxiliary measuring device for pipe joint deviation.

Background

The boiler is widely applied to projects such as heat supply, gas supply, heat supply and the like as common pressure equipment, and the header and the boiler barrel are used as important components of the boiler and play roles in collecting, mixing and distributing working media and ensuring the uniform distribution and uniform heating of the working media, so that the efficiency of the boiler is better ensured and improved. The distribution and collection of the working medium are realized by the pipe joints welded on the header and the boiler barrel, and the communication of all the components is realized by the butt joint connecting pipes, the valves and the like among the pipe joints. When the pipe joint is butted, the inner surfaces are required to be aligned, the deviation of the outer edges meets the standard allowable maximum deviation requirement, and the deviation of the assembled pipe joint influences the butting quality of a pipeline valve connected with the pipe joint. Therefore, after the pipe joint is assembled and before the pipe joint leaves a factory, the deviation condition of the pipe joint deviating from the processing datum line is measured, checked and recorded, and the height deviation, the longitudinal gradient, the transverse gradient and the like of the pipe joint need to be measured and recorded, so that the installation quality of a pipeline and a valve connected with the pipe joint during construction site installation is effectively guaranteed. The header and the boiler barrel are cylindrical, the height of the pipe joint is generally not less than 50mm, the height deviation of the pipe joint is generally required to be not more than +/-1 to +/-4 mm according to different pipe joint types, the longitudinal inclination is not more than +/-1.5 mm, the transverse inclination is not more than +/-2.5 to 3mm or 1 degree, and the smaller one is measured and accepted according to different pipe joint types.

At present, the pipe joint deviation is measured through conventional detection tools such as a square, a straight steel ruler, a tape measure and a pull wire in a multi-azimuth and multi-angle combination mode, the marking measurement is read for many times, the use and the combination are inconvenient, the precision cannot be guaranteed, and the measurement error is large.

Disclosure of Invention

The invention aims to provide a pipe joint deviation auxiliary measuring device which can quickly and directly measure the height of a pipe joint, accurately measure the offset distance and angle of the pipe end of the pipe joint, calculate the longitudinal gradient and the transverse gradient of the measured pipe joint, and provide assistance for the subsequent introduction of a logic operation chip and the structure increase of a liquid crystal display screen and the quick output and display of the pipe joint deviation. The invention has the advantages of compact integral structure, simple operation, high measurement precision, good practicability and convenient manufacture and maintenance.

According to the technical scheme provided by the invention: a pipe joint deviation auxiliary measuring device comprises a support, wherein a height rod is vertically and slidably mounted in the support, a first anti-rotation locking mechanism is arranged between the support and the height rod, a longitudinal scale, a rotating sleeve and an angle rotating disc are sleeved on the height rod through a shaft sleeve, the first anti-rotation locking mechanism is arranged between the rotating sleeve, the shaft sleeve and the height rod, the angle scale is slidably mounted on the height rod, a second anti-rotation locking mechanism is arranged between the height rod and the angle scale, clamping feet and a longitudinal vernier are slidably mounted on the longitudinal scale, and the clamping feet are arranged on two sides of the longitudinal vernier in pairs; the clamping pin is hinged with one end of the side connecting plate, the longitudinal vernier is hinged with the middle part of the middle connecting plate, and the other ends of the side connecting plates arranged in pairs are hinged with the two ends of the middle connecting plate; a second sliding locking mechanism is arranged between the longitudinal vernier and the longitudinal scale; the height rod, the longitudinal scale and the longitudinal vernier are provided with length numerical value graduations, the angle turntable is provided with angle numerical value graduations, and the angle scale is provided with angle vernier numerical value graduations.

As a further improvement of the invention, the shaft sleeve is fixed with the longitudinal scale, the rotating sleeve and the angle turntable through interference fit, the shaft sleeve is in clearance fit with the height rod, the shaft sleeve can slide and rotate on the height rod, and the longitudinal scale, the rotating sleeve and the angle turntable are fixed into a whole through a third countersunk head screw and a first countersunk head screw.

As a further improvement of the invention, the lower part of the support is provided with a longitudinal positioning part which is an inverted symmetrical V-shaped structure, the center of the support is provided with a height rod sliding hole, and the central axis of the circular hole is vertical to the longitudinal symmetrical center line of the longitudinal positioning part.

As a further improvement of the invention, the lower end of the height rod is provided with a centering scribed line which is coincident with the central axis of the height rod, the outer side of the height rod is provided with a height numerical scale plane, and the lowest end of the height rod is a 0 bit line reference.

As a further improvement of the invention, the first anti-rotation locking mechanism comprises a first anti-rotation sliding groove, a first locking groove, a first anti-rotation screw and a first locking screw, wherein both sides of the height rod are respectively provided with the through first anti-rotation sliding groove and the first locking groove, both sides of the support are respectively provided with the first anti-rotation screw and the first locking screw in a threaded manner, and the tail part of the first anti-rotation screw and the tail part of the first locking screw are respectively positioned in the first anti-rotation sliding groove and the first locking groove; the first anti-rotation sliding groove and the tail part of the first anti-rotation screw are in a matched V shape; the first locking groove and the tail part of the first locking screw are in matched V shapes.

As a further improvement of the invention, the first sliding locking mechanism comprises a sliding locking screw, and the sliding locking screw is arranged in a threaded hole on the periphery of the rotating sleeve and penetrates through the shaft sleeve to abut against the height rod.

As a further improvement of the invention, the longitudinal scale adopts a round head plate-shaped structure, the upper plane of the longitudinal scale is provided with a length numerical scale, and the longitudinal scale is provided with a clamping pin and a longitudinal vernier in a sliding way through a dovetail groove structure.

As a further improvement of the invention, the lower part of the clamping foot is provided with a pipe joint excircle bayonet which is a symmetrical V-shaped groove structure; a vernier dovetail groove is formed in the longitudinal vernier, a second inlaid strip is arranged on the side wall of the vernier dovetail groove, a reading window is formed in one side of the vernier dovetail groove, the lower edge of the window is a vernier value inclined plane, a vernier value scribed line is arranged on the vernier value inclined plane, and the vernier value scribed line is obliquely aligned with the length value scribed line of the longitudinal scale; the clamping pin and the longitudinal vernier adopt a split structure; the second sliding locking mechanism is a sliding locking pin shaft screw, the longitudinal vernier is in threaded connection with the sliding locking pin shaft screw, and the sliding locking pin shaft screw is hinged to the middle of the middle connecting plate and abuts against the longitudinal scale.

As a further improvement of the invention, the second anti-rotation locking mechanism comprises a sliding sleeve, the sliding sleeve is slidably mounted on the height rod, and the bottom of the sliding sleeve is fixedly connected with the angle scale through a second countersunk head screw; a second anti-rotation screw and a second locking screw are respectively installed on two sides of the sliding sleeve in a threaded mode, the tail portion of the second anti-rotation screw and the tail portion of the second locking screw are respectively located in a first anti-rotation sliding groove and a first locking groove of the full length of the height rod, and the tail portion of the second anti-rotation screw and the first anti-rotation sliding groove of the height rod are in a matched V shape; the tail part of the second locking screw and the first locking groove of the height rod are in a matched V shape.

As a further improvement of the invention, the angle rotary table adopts a round head plate-shaped structure, the edge of a plane great arc on the angle rotary table is provided with angle numerical value scribed lines symmetrical to a 0-position reference line, and the 0-position reference line is vertical to the length central line of the longitudinal scale 4; the angle scale is positioned above the angle turntable and is of a round-head plate-shaped structure, and the radius of the edge of a plane large arc on the angle scale is smaller than that of the edge of the plane large arc on the angle turntable; the edge of a plane great arc on the angle scale is provided with a scale inclined plane, an angle vernier value scribed line symmetrical to a 0-position reference line is arranged on the scale inclined plane, and the angle vernier value scribed line is obliquely aligned with an angle numerical value scribed line of the angle turntable; the 0-position datum line of the angle vernier numerical reticle of the angle scale is perpendicular to the longitudinal symmetrical center line of the lower longitudinal positioning part of the support.

The positive progress effect of this application lies in:

1. the whole structure is simple and compact, the occupied space is small, and the manufacture, assembly and maintenance are convenient; 2. the support and the clamping pin adopt a symmetrical V-shaped groove structure to perform reference centering and centering, the calibration and positioning are accurate, and the processing operation is convenient; 3. the height rod, the support and the angle scale adopt a cylindrical and symmetrical double-V-shaped sliding groove and manual taper end screw locking structure, so that the centering performance is good, the sliding is stable, and the positioning is accurate; 4. the longitudinal scale, the angle rotary table and the rotary sleeve are installed into a whole and then rotationally slide with the height rod through the shaft sleeve adjusting gap, the structure is mature and simple, and the rotational sliding is stable; 5. the height rod is provided with a height numerical scale mark, the lowest end of the height rod is a 0 bit line reference, and a centering plane reticle is additionally arranged, so that centering is convenient; 6. the longitudinal scale is supported on the end surface of the pipe joint to measure the height, a manual screw is locked, the support is stable, and the measured height value is directly read; 7. the angle rotary table and the angle scale are provided with symmetrical angle numerical value reticle, and the manual screw locking structure is convenient for bidirectional deflection angle measurement and has high measurement precision; 8. the length axis of the longitudinal scale and the central axis of the angle turntable are vertically arranged, longitudinally adjacent pipe joints are avoided, the position of the support is conveniently arranged and positioned according to actual space and space, the practicability is good, and the adaptability is wide; 9. the longitudinal vernier and the clamping foot are slidably arranged on the longitudinal scale, a dovetail-shaped sliding groove structure is adopted, the gap is adjusted by the inlaid strip, the size is compact, the sliding is stable, and the adjustment is convenient; 10. the clamping pins are arranged in pairs, and after the longitudinal scale is stably supported on the pipe end, the double V-shaped grooves are in contact with the circumference of the pipe end, so that the centering is accurate; 11. the centering hinge structure composed of the side connecting plates, the middle connecting plate and the pin shaft screws is simple and mature in structure and convenient to manufacture; 12. the offset distance is measured by adopting a vernier numerical reticle and scale numerical reticle alignment measurement reading mode, and the manual screw locking is adopted, so that the structure is compact, the observation is convenient, and the measurement precision is high; 13. the structural design of measuring the height and the pipe end offset distance by a sliding mode and measuring the offset angle by a rotating mode greatly reserves the similar structures of the prior digital display vernier caliper and the digital display angle measuring tape, further optimizes the display output modes of height measurement, offset distance measurement and angle measurement for follow-up, derives the offset distance measurement and angle measurement values, expands and adds the structures of a logic operation module chip, a display screen, a printing port and the like of sine, cosine and the like, can be improved into a direct reading value display mode to display the joint deviation of the measured pipe or print and output the data record of the joint deviation of the measured pipe, and provides great possibility and support for follow-up automatic intelligent display and record of the joint deviation of the pipe; 14. the method is suitable for measuring the deviation of the pipe joint on a cylindrical workpiece connected with the pipe joint and also suitable for measuring the deviation of the pipe joint on a flat plate workpiece connected with the pipe joint.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view of the present invention.

Fig. 3 is a schematic structural view of the clip of the present invention.

FIG. 4 is a schematic view of the longitudinal cursor of the present invention.

Fig. 5 is a schematic view of the measuring operation principle of the present invention.

Detailed Description

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

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover such processes, methods, systems, articles, or apparatus that comprise a list of steps or elements, are not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such processes, methods, articles, or apparatus.

In fig. 1-5, the device comprises a support 1, a support first groove edge 1-1, a support second groove edge 1-2, a first anti-rotation screw 2, a height rod 3, a centering scale line 3-1, a semi-cone plane 3-2, a height numerical scale plane 3-3, a longitudinal scale 4, an angle rotary table 5, an angle scale 6, a scale inclined plane 6-1, a first countersunk screw 7, a second anti-rotation screw 8, a sliding sleeve 9, a second locking screw 10, a second countersunk screw 11, a rotating sleeve 12, a shaft sleeve 13, a third countersunk screw 14, a first locking screw 15, a sliding locking screw 16, a side connecting plate 17, a clamping foot 18, a longitudinal cursor 19, a middle connecting plate 20, a first pin shaft screw 21 and a nut 22; the clamping foot 18 comprises a cover plate 23, a first gib 24, a second pin shaft screw 25, a fourth countersunk head screw 26 and a foot body 27; the longitudinal vernier 19 comprises a batten 28, a second gib 29, a graduated cover plate 30, a sliding locking pin shaft screw 31, a fifth countersunk screw 32, a pipe joint 33, a pipe joint connecting workpiece 34, a pipe joint reference center 35, a pipe joint longitudinal reference line 35-1, a pipe joint transverse reference line 35-2, a measurement transverse offset reference line 36-1, a measurement reference offset center 36, a pipe joint pipe end center 37, a transverse inclination 38, a longitudinal inclination 39 and the like.

As shown in fig. 1-2, the invention is a pipe joint deviation auxiliary measuring device, which comprises a support 1, a height rod 3 is vertically and slidably installed in the support 1, a first anti-rotation locking mechanism is arranged between the support 1 and the height rod 3, a longitudinal scale 4, a rotating sleeve 12 and an angle rotating disc 5 are sleeved on the height rod 3 through a shaft sleeve 13, the shaft sleeve 13 is fixed with the longitudinal scale 4, the rotating sleeve 12 and the angle rotating disc 5 through interference fit, the shaft sleeve 13 is in clearance fit with the height rod 3, the shaft sleeve 13 can slide and rotate on the height rod 3, the longitudinal scale 4, the rotating sleeve 12 and the angle rotating disc 5 are fixed into a whole through a third countersunk head screw 14 and a first countersunk screw 7, a first sliding locking mechanism is arranged between the rotating sleeve 12, the shaft sleeve 13 and the height rod 3, an angle scale 6 is slidably installed on the height rod 3, a second anti-rotation locking mechanism is arranged between the height rod 3 and the angle scale 6, the longitudinal scale 4 is slidably provided with clamping feet 18 and a longitudinal vernier 19, and the clamping feet 18 are arranged on two sides of the longitudinal vernier 19 in pairs; the clamping feet 18 are hinged with one end of the side connecting plate 17, the longitudinal vernier 19 is hinged with the middle part of the middle connecting plate 20 and can slide on the longitudinal scale 4, and the other ends of the side connecting plates 17 arranged in pairs are hinged with the two ends of the middle connecting plate 20; a second sliding locking mechanism is arranged between the longitudinal vernier 19 and the longitudinal scale 4. The height rod 3, the longitudinal scale 4 and the longitudinal vernier 19 are provided with length numerical value scribed lines, the angle rotary table 5 is provided with angle numerical value scribed lines, and the angle scale 6 is provided with angle vernier numerical value scribed lines, so that the height of the pipe joint can be quickly and directly measured, and the offset distance and the angle of the pipe end of the pipe joint can be accurately measured.

The lower part of the support 1 is provided with a longitudinal positioning part which is an inverted symmetrical V-shaped structure, the center of the support 1 is provided with a height rod sliding hole, and the central axis of the circular hole is vertical to the longitudinal symmetrical center line of the longitudinal positioning part; the height rod 3 is installed in the height rod sliding hole.

The lower end of the height rod 3 is of a semi-cone structure, a centering scribed line 3-1 is arranged in the center of a semi-cone plane 3-2 and is coincident with the central axis of the height rod 3, a height numerical scale plane 3-3 is arranged on the outer side of the height rod 3, and the lowest end of the height rod is a 0-bit line reference, so that alignment measurement is facilitated.

The first anti-rotation locking mechanism comprises a first anti-rotation sliding groove, a first locking groove, a first anti-rotation screw 2 and a first locking screw 15, the two sides of the height rod 3 are respectively provided with the first anti-rotation sliding groove and the first locking groove which are full of length, the two sides of the support 1 are respectively provided with the first anti-rotation screw 2 and the first locking screw 15 in a threaded manner, and the tail part of the first anti-rotation screw 2 and the tail part of the first locking screw 15 are respectively positioned in the first anti-rotation sliding groove and the first locking groove. First prevent changeing the V type that spout and first prevent changeing 2 afterbody of screw for the adaptation, first prevent changeing screw 2 and prevent that high pole 3 from rotating. First locking groove and first locking screw 15 afterbody are the V type of adaptation, when needing locking high pole 3 and support 1, screw up first locking screw 15, and first locking groove is withstood to 15 afterbody V faces of first locking screw, makes high pole 3 and support 1 locking.

In order to reduce the weight of the support 1 and facilitate the arrangement of the first anti-rotation screws 2 and the first locking screws 15, the upper part of the support 1 is provided with a weight-reducing boss, the first anti-rotation screws 2 and the first locking screws 15 are horizontally screwed on two sides of the weight-reducing boss, and the weight-reducing boss is small relative to other parts of the support 1.

The rotating sleeve 12 is of a concentric circle tubular structure, the axis of the rotating sleeve is coincident with the axis of the height rod 3, the lower end face of the rotating sleeve is fixedly provided with the longitudinal scale 4 through a third countersunk screw 14, the upper end face of the rotating sleeve is fixedly provided with the angle turntable 5 through a first countersunk screw 7, and the 0-position datum line of the angle turntable 5 is perpendicular to the length center line of the longitudinal scale 4; the inner hole of the rotary sleeve 12 has the same diameter with the longitudinal scale 4 and the round hole at the head part of the angle turntable 5 and is fixed with the outer circumference of the shaft sleeve 13 in an interference fit way.

The first sliding locking mechanism comprises a sliding locking screw 16, the sliding locking screw 16 is installed in a threaded hole formed in the periphery of the rotating sleeve 12 and penetrates through the shaft sleeve 13 to abut against the height rod 3, and the longitudinal scale 4, the shaft sleeve 13, the rotating sleeve 12 and the angle rotating disc 5 can be fixed on the height rod 3.

The shaft sleeve 13 is of a concentric circle tubular structure and can be made of brass materials, and the axis of the shaft sleeve is coincident with the axis of the height rod 3; an inner hole of the shaft sleeve 13 is matched with the outer circumference of the height rod 3, the outer circumference of the shaft sleeve 13 is fixed with an inner hole of the rotating sleeve 12, the longitudinal scale 4 and a round hole at the head part of the angle rotating disc 5 which are integrally arranged in an interference fit manner, and the shaft sleeve 13, the longitudinal scale 4, the rotating sleeve 12 and the angle rotating disc can integrally slide up and down along the height rod 3 and rotate around the axis of the height rod 3; the shaft sleeve 13 can adjust the sliding and rotating clearance between the whole of the longitudinal scale 4, the rotating sleeve 12 and the angle rotating disc 5 and the height rod.

The longitudinal scale 4 adopts a round head plate-shaped structure, a round hole is formed at the round head end and is fixed with the outer circumference of the shaft sleeve 13 in an interference fit manner, and the axis of the round hole is coincident with the axis of the shaft sleeve 13; the upper plane of the longitudinal scale 4 is provided with a length numerical reticle, and the 0-position datum line passes through the center of the round-head-end round hole; the longitudinal scale 4 is provided with a clamping pin 18 and a longitudinal vernier 19 in a sliding way, the sliding contact part is provided with a dovetail sliding groove structure with a wide upper part and a narrow lower part, and the center of the clamping pin 18 and the longitudinal vernier 19 always moves along the length center line of the longitudinal scale 4 when the clamping pin 18 and the longitudinal vernier 19 slide.

The clamping feet 18 are arranged at two sides of the longitudinal vernier 19 in pairs, clamping foot dovetail grooves with wide upper parts and narrow lower parts are formed in the clamping feet 18, the lower parts of the clamping feet 18 are provided with pipe joint excircle bayonets which are of symmetrical V-shaped groove structures, and vertical symmetrical center lines are coincided; the first gib 24 of the clamping foot is arranged on the side wall of the dovetail groove of the clamping foot dovetail groove to adjust the gap between the clamping foot 18 and the longitudinal scale 4. The clamping pin 18 is hinged with one end of the side connecting plate 17 through a second pin shaft screw 25.

For the convenience of processing, as shown in fig. 3, the clip 18 is a separate structure and is connected by the leg body 27 and the cover plate 23 via a fourth countersunk screw 26. The center of the upper part of the cover plate 23 is provided with a screw hole which is provided with a side connecting plate 17 and a second pin shaft screw 25; when the clamping feet 18 arranged in pairs slide along the longitudinal scale 4, the axle center of the second pin shaft screw 25 always moves along the central line of the length 4 of the longitudinal scale.

A vernier dovetail groove with a wide upper part and a narrow lower part is formed in the longitudinal vernier 19, and a second panel 29 is arranged on the side wall of the vernier dovetail groove to adjust the gap between the longitudinal vernier 19 and the longitudinal scale 4. The longitudinal vernier 19 is in threaded connection with a sliding locking pin bolt 31, and the sliding locking pin bolt 31 is hinged to the middle part of the middle connecting plate 20 and abuts against the longitudinal scale 4. A reading window is formed in one side of the vernier dovetail groove, the lower edge of the window is a vernier value inclined plane, a vernier value scribed line is arranged on the vernier value inclined plane, a 0-bit datum line passes through the center of the sliding locking pin shaft screw 31, and the vernier value scribed line is obliquely aligned with the length value scribed line of the longitudinal scale 4, so that the corresponding length value of the center of the longitudinal vernier 19 can be conveniently read; when the longitudinal vernier 19 slides, the axis of the sliding locking pin bolt 31 always moves along the length center line of the longitudinal scale 4.

For the convenience of processing, as shown in fig. 4, the longitudinal cursor 19 is a split structure, and is connected by a scale cover plate 30 and a pressing bar 28 through a fifth countersunk head screw 32. The pressing strips 28 are arranged in pairs, the inner sides of the pressing strips are inclined planes, the pressing strips are installed on the lower portion of the scale cover plate 30 through fifth countersunk head screws 32 to form symmetrical grooves with wide upper portions and narrow lower portions, dovetail sliding groove structures are formed between the grooves and the longitudinal scale 4, the top of the scale cover plate 30 is protruded, a screw hole is formed in the center of the top protrusion, the middle connecting plate 20 and the sliding locking pin shaft screw 31 are installed, and the sliding locking pin shaft screw 31 can fasten the middle connecting plate 20 and the longitudinal scale 4; the scale cover plate 30 is provided with a reading window, the lower edge of the window is a vernier value inclined plane, a vernier value scribed line is arranged on the vernier value inclined plane, the 0-bit datum line passes through the center of the screw hole, and the vernier value scribed line is obliquely aligned with the length value scribed line of the longitudinal scale 4, so that the corresponding length value of the center of the longitudinal vernier 19 can be conveniently read; when the longitudinal vernier 19 slides, the axis of the sliding locking pin bolt 31 always moves along the length center line of the longitudinal scale 4.

The side connecting plates 17 are arranged in pairs, through holes are formed in the two ends of each side connecting plate, through holes are formed in the two ends and the center of each middle connecting plate 20, the two ends of each middle connecting plate 20 are connected with one end of each side connecting plate 17 arranged in pairs through first pin shaft screws 21 and nuts 22, and the center holes are installed on the longitudinal vernier 19 through sliding locking pin shaft screws 31; the other end of the side connecting plate 17 is arranged on the cover plate 23 of the clamping pin 18 by a second pin shaft screw 25; the middle connecting plate 20 can rotate around the center of the sliding locking pin bolt 31, and the side connecting plate 17 can rotate around the axis of the second pin bolt 25.

The axes of the height rod 3, the second pin shaft screw 25 and the sliding locking pin shaft screw 31 are always positioned on the length centerline of the longitudinal scale 4.

The angle rotary table 5 adopts a round head platy structure, a round hole is formed at the small round head end, the axis of the round hole is coincident with the axis of the height rod 3, and the round hole is fixed with the outer circumference of the shaft sleeve 13 in an interference fit manner; an angle numerical value reticle is arranged on the arc edge of the upper plane of the angle rotary table 5, and the 0-position datum line passes through the center of the round end round hole and is perpendicular to the length central line of the coaxially installed longitudinal scale 4.

A second sliding locking mechanism is arranged between the longitudinal vernier 19 and the longitudinal scale 4, and the second sliding locking mechanism is a sliding locking pin bolt 31.

The second prevents changeing locking mechanical system and includes sliding sleeve 9, and sliding sleeve 9 removes to be installed at high pole 3, and sliding sleeve 9 bottom is through 11 fixed connection angle scales 6 of second countersunk screw, and 9 both sides of sliding sleeve are threaded mounting second respectively and are prevented changeing screw 8, second locking screw 10, and the second prevents changeing 8 afterbody of screw, second locking screw 10 afterbody and is located high pole 3 first of full length respectively and prevents changeing spout, first locking groove. The second prevents that 8 afterbody of changeing the screw and the first V type that prevents changeing the spout for the adaptation of high pole 3, and the second prevents changeing screw 8 and prevents that angle scale 6, sliding sleeve 9 from rotating. The tail of the second locking screw 10 and the first locking groove of the height rod 3 are matched in a V shape, when the angle scale 6 and the height rod 3 need to be locked, the second locking screw 10 is screwed, and the V surface at the tail of the second locking screw 10 props against the first locking groove of the height rod 3, so that the angle scale 6, the sliding sleeve 9 and the height rod 3 are fixed.

The sliding sleeve 9 adopts a concentric circle tubular structure, and the axis of the sliding sleeve is coincident with the axis of the height rod 3; the lower end face is provided with a fastening angle cursor 6 by a second countersunk head screw 11.

The angle scale 6 is located 5 tops of angle carousel, and angle scale 6 adopts button head platelike structure, and little round head end is opened has the round hole, and the coincidence of round hole axis and high pole axis is unanimous, and the round hole internal diameter is unanimous with sliding sleeve 9 hole. The radius of the edge of the large circular arc on the upper plane of the angle scale 6 is smaller than that of the edge of the large circular arc on the upper plane of the angle turntable 5; in order to enable the angle measurement to be more accurate, a scale inclined plane 6-1 is arranged at the edge of a large plane circular arc on an angle scale 6, an angle vernier value scale line symmetrical to a 0-position reference line of an angle vernier is arranged on the scale inclined plane 6-1, and the angle vernier value scale line is obliquely aligned with an angle numerical value scale line of a lower angle turntable 5; the 0-position datum line of the angle scale 6 passes through the center of the round end round hole and is vertical to the longitudinal symmetrical center line of the longitudinal positioning part at the lower part of the support 1; after the periphery of the rotating sleeve 13 is locked by the sliding locking screw 16, the relative positions of the angle vernier 6 and the angle rotary table 5 are also locked in sequence, and the deflection angle value of the longitudinal scale 4 slightly rotated around the height rod 3 can be accurately measured and read by checking the numerical reticle of the angle vernier 6.

The working process of the invention is as follows:

before use, the measurement device is determined to be qualified after being manufactured, parts of the checking device are completely and accurately installed, numerical value scribed lines are clear, and the centering scribed line 3-1 at the lower end of the height rod 3 is vertical to the longitudinal symmetrical center line of the symmetrical V-shaped structure at the lower part of the support 1 and is consistent with the vertical symmetrical center line of the V-shaped structure; when the angle rotary table 5 is aligned with the scale inclined plane 6-1 of the angle scale 6 and the scale 0 line, the length axis of the longitudinal scale 4 is vertical to the scale 0 line; the lower surface of the longitudinal scale 4 is straight; the height rod 3, the clamping feet 18 and the longitudinal vernier 19 slide stably, the bottom connecting line of the V-shaped groove at the lower part of the foot body 27 of the clamping feet 18 is positioned on the length central line of the longitudinal scale 4, the distance between the axle centers of the second pin shaft screws 25 on the paired clamping feet 18 and the axle centers of the sliding locking pin shaft screws 31 on the longitudinal vernier 19 is the same, and the axle centers of the height rod 3, the second pin shaft screws 25 and the sliding locking pin shaft screws 31 are always positioned on the length central line of the longitudinal scale 4.

As shown in figure 5, when in use, a pipe joint transverse reference line 35-2 of a pipe joint 33 to be measured is shifted towards one side of the pipe joint 33 along a pipe joint longitudinal reference line 35-1 by a certain distance value S to a measurement reference shift center 36 on one side of the pipe joint 33, so as to ensure that a support 1 effectively avoids the detected pipe joint 33, adjacent pipe joints or accessories and fillet welds thereof when placed, position marks of a measurement transverse shift reference line 36-1 on one side of the pipe joint 33 and the measurement reference shift center 36 are scribed on the outer circumference of a workpiece 34 connected with the pipe joint, the measurement transverse shift reference line 36-1 is perpendicular to the pipe joint longitudinal reference line 35-1, and the intersection point is 36.

After the height rod 3 is lifted until the lowest end of the height rod does not expose out of the through hole in the middle of the support 3, the height rod 3 and the support 1 are locked by a first locking screw 15 temporarily, and abrasion of the 0-position reference at the lowest end of the height rod 3 is avoided; after the longitudinal scale 4 and the angle scale 6 are lifted to the lower plane of the longitudinal scale 4 and are higher than the height of the detected pipe joint 33, the device is placed beside the pipe joint to be detected, the inverted V-shaped groove at the lower part of the support 1 spans the longitudinal reference line 35-1 of the pipe joint, the first groove edge 1-1 and the second groove edge 1-2 of the support are parallel to the longitudinal reference line 35-1 of the pipe joint and are in stable contact with the outer circumference of a workpiece 34 connected with the pipe joint, and the distances from the first groove edge 1-1 of the support and the second groove edge 1-2 of the support to the longitudinal reference line 35-1 of the pipe joint are equal; and loosening the first locking screw 15, extending the lower scale line end of the height rod 3 out of the through hole of the support 1, contacting the centering scale line 3-1 with the center position of the offset center 36 of the measurement reference marked in alignment, keeping the distances between the first groove edge 1-1 of the support and the second groove edge 1-2 of the support to the longitudinal reference line 35-1 of the pipe joint equal, and then screwing the first locking screw 15 to lock the height rod 3 in the through hole of the support 1.

Moving the positions of the clamping feet 18 at the two sides of the longitudinal scale 4, checking that the outer bayonet of the pipe joint of the foot body 27 for keeping the clamping feet 18 is larger than the outer circumference of the pipe end of the pipe joint 33, moving the longitudinal scale 4 downwards to the lower plane of the longitudinal scale 4 to be in stable contact with and support on the top end surface of the measured pipe joint 33, moving the clamping feet 18 at the two sides to ensure that one side of the outer bayonet of the pipe joint of the foot body 27 of the clamping feet 18 is in contact with the outer circumference of the pipe end of the pipe joint 33, slightly rotating the longitudinal scale 4 in the direction of reducing the gap between the other side of the outer bayonet of the pipe joint of the foot body 27 of the clamping feet 18 and the outer circumference of the pipe end of the pipe joint 33, adjusting the clamping feet 18 at the two sides to slide, searching for the stable contact of the two sides of the outer bayonet of the pipe joint of the foot body 27 of the clamping feet 18 at the two sides with the outer circumference of the pipe joint 33, tightening the sliding locking pin shaft screw 31 to lock the position of the longitudinal vernier 19 on the longitudinal scale 4, tightening the sliding locking screw 16 to lock the deflection and the height position of the height rod 3, tightening the second locking screw 10 locks the position of the angle scale 6 on the height bar 3, during which it should be checked that the abutment 1 and the height bar 3 are guaranteed to smoothly contact the outer circumference of the piece 34 to which the pipe joint is connected, the position of the piece 34 to which the pipe joint is connected remaining unchanged.

Reading the numerical reticle value on the height rod 3 corresponding to the lower plane of the longitudinal scale 4, namely the measured height of the measured pipe joint; reading the numerical value of the scribed line of the longitudinal cursor 19 aligned with the scribed line of the longitudinal scale 4, namely the measured offset distance of the center 37 of the pipe end of the measured pipe joint, and recording as L; reading the numerical value of the scribed line of the scale inclined surface 6-1 of the angle scale 6 aligned with the scribed line of the angle turntable 5, namely the measured deflection angle of the center 37 of the pipe end of the measured pipe joint, and recording as theta; substituting the values of L and theta into a calculation formula: longitudinal inclination 39= | L × cos θ -S |; the lateral inclination 38= L sin θ, i.e. the measured longitudinal inclination 39 and the lateral inclination 38 of the measured pipe end center 37 of the pipe joint can be calculated.

As a further improvement of the invention, the lower plane of the circular hole at the head part of the longitudinal scale 4 is aligned with the scribed part of the height rod 3, the lower plane of the circular hole at the head part of the longitudinal scale 4 is aligned with the scribed part of the longitudinal scale 4, the scribed part of the longitudinal cursor 19 is aligned with the scribed part of the longitudinal scale 4, the scribed part of the angle scale 6 is aligned with the scribed part of the angle rotating disc 5 according to the similar digital display vernier caliper and the digital display angle scale, the upper angle scale 6 of the device is provided with an LCD screen, an integrated chip module which has the logic operation function of satisfying the longitudinal gradient 39= | L × cos θ -S |, the transverse gradient 38= L × sin θ, a data output port and other expansion functional parts, S, L and θ numerical values are led into the integrated chip module, so that the manual calculation recording step can be skipped, the display on the LCD screen or the printing record can be directly led out, and the function of further more intelligently displaying and recording the pipe joint deviation can be satisfied.

The device has simple and compact integral structure, simple operation, high measurement precision, good practicability and convenient manufacture and maintenance, can be well suitable for the pipe joint deviation measurement of products such as boilers, containers and the like, not only can be suitable for the pipe joint deviation measurement on a cylindrical workpiece connected with the pipe joint, but also can be suitable for the pipe joint deviation measurement on a flat plate workpiece connected with the pipe joint, thereby not only avoiding the defects of inconvenient combination operation and poor precision of the original numerous conventional detection measuring tools, but also continuing the advantages of the detection method of the existing length vernier caliper and angle measuring tape, greatly facilitating the direct reading of the pipe joint height deviation measurement, and improving the deviation measurement precision of the longitudinal inclination 39 and the transverse inclination 38 of the pipe joint.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.