CN216791064U - Device for measuring wall thickness of steel pipe based on torsion - Google Patents

Abstract

The utility model discloses a device for measuring the wall thickness of a steel pipe based on a torsional mode, and belongs to the technical field of steel pipe measurement. The device based on torsional mode measures steel pipe wall thickness includes two first supports, two second supports, two third supports, a fourth support, sixteen measuring sticks, eight connecting rods, four baffles, eight first screws, eight second screws, eight wrong piece, sixteen hinges, four bulbs, four batteries, four springs, sixteen screw rods and sixteen nuts, can center the inner wall of steel pipe fast, and then can carry out effectual measurement to the wall thickness of steel pipe, and have low in manufacturing cost, easy operation and the high characteristics of measurement accuracy.

Description

Device for measuring wall thickness of steel pipe based on torsion

Technical Field

The utility model belongs to the technical field of steel pipe measurement, and particularly relates to a device for measuring the wall thickness of a steel pipe based on a torsional mode.

Background

At present, need measure its wall thickness in the production and processing field of steel pipe, traditional measuring device either based on vernier caliper formula, or based on spiral micrometering formula, although only need carry out once direct measurement and just can accomplish the thickness measurement task, these measuring device mostly lack the correlation function of centering steel pipe, consequently, traditional measuring device can not guarantee to measure along the radial of steel pipe, and the reliability of measuring is difficult to guarantee promptly.

Patent document CN102052885A discloses a pipe wall thickness measuring device, which mainly comprises a dial indicator, a measuring rocker arm, a base, a V-shaped support, a fixed measuring head, a measuring head of the dial indicator, a heavy hammer, a guide post and a slide block.

Patent document CN201378035Y discloses a portable high-precision measuring device for measuring the thickness of the inner wall of a seamless steel tube, which mainly comprises a bracket, a measuring tool, a measuring arm, an adjusting screw, a positioning nut and a measuring ball, but because the device has no axis positioning device, the reliability of the measurement is not good enough.

Patent document CN202814292U discloses a multifunctional wall thickness measuring instrument, which mainly comprises a ruler body, a fixed measuring jaw, a movable measuring jaw, an auxiliary measuring block, a movable vernier ruler frame, a fixed ruler frame, a fine adjustment device, a fastening screw, a limiting block and a guide block.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device for measuring the wall thickness of a steel pipe based on a torsional mode, which comprises: the device comprises two first supports, two second supports, two third supports, a fourth support, sixteen measuring rods, eight connecting rods, four baffles, eight first screws, eight second screws, eight screwing blocks, sixteen hinges, four bulbs, four batteries, four springs, sixteen screw rods and sixteen nuts; wherein:

the first bracket is formed by connecting a first main body and four first auxiliary bodies, and the four first auxiliary bodies are positioned on the upper end surface of the first main body; the first main body is of a cuboid symmetrical structure, four cylindrical first through holes are symmetrically formed in the first main body, the screw rod penetrates through the first through holes, and the nut is screwed at one end of the screw rod; the first auxiliary bodies are of cylindrical symmetrical structures, and fifty grid scales are uniformly marked on the side surface of each first auxiliary body along the circumferential direction; a first screw hole is formed in the axis position of each first auxiliary body, the measuring rod is screwed in the first screw hole, and the first screw hole also penetrates through the first main body;

the second bracket is formed by connecting two second main bodies and a second auxiliary body, the second main bodies and the second auxiliary body are both in rectangular symmetrical structures, and the second auxiliary body is positioned between the two second main bodies; each second main body is symmetrically provided with four cylindrical second through holes, and the screw rods penetrate through the second through holes;

the third support is formed by connecting a third main body and eight third auxiliary bodies, the third main body and the third auxiliary bodies are of rectangular symmetrical structures, and the eight third auxiliary bodies are divided into four groups and are simultaneously positioned on one end face of the third main body; a first through groove in a cuboid shape can be formed between the two third auxiliary bodies of each group, and the connecting rod penetrates through the first through groove; each third auxiliary body is provided with a cylindrical fourth through hole, and the hinge is arranged in the fourth through hole in a penetrating manner; the third main body is symmetrically provided with two cuboid fifth through holes, and the screwing block, the battery, the bulb and the spring penetrate through the fifth through holes; two groups of six cylindrical sixth through holes are symmetrically formed in the third main body, the first screw penetrates through the sixth through holes, and each sixth through hole is communicated with the corresponding fifth through hole; two second screw holes are respectively formed in the upper end face and the lower end face of the third main body, and second screws are screwed in the second screw holes;

the fourth bracket is formed by connecting two sixth main bodies, eight sixth auxiliary bodies, two seventh auxiliary bodies, sixteen eighth auxiliary bodies and two ninth auxiliary bodies, wherein the sixth main bodies, the seventh auxiliary bodies, the eighth auxiliary bodies and the ninth auxiliary bodies are all rectangular symmetrical structures, the two seventh auxiliary bodies are positioned between the two sixth main bodies, the sixteen eighth auxiliary bodies are divided into eight groups and are respectively positioned on the left end surface and the right end surface of the two seventh auxiliary bodies, and the two ninth auxiliary bodies are positioned between the two seventh auxiliary bodies; a fourth through groove in a cuboid shape can be formed between the two eighth auxiliary bodies of each group, and the connecting rod penetrates through the fourth through groove; the sixth auxiliary bodies are of cylindrical symmetrical structures, and fifty grid scales are uniformly marked on the side surface of each sixth auxiliary body along the circumferential direction; a third screw hole is formed in the axis position of each sixth auxiliary body, and the measuring rod is screwed in the third screw hole; the third screw hole also penetrates through the sixth main body; each sixth main body is symmetrically provided with four cylindrical seventh through holes, and the screw rod penetrates through the seventh through hole; each eighth auxiliary body is provided with an eighth cylindrical through hole, and the hinge penetrates through the eighth through hole; the upper end face of each ninth auxiliary body is marked with a group of scales so as to determine the positions of the eight connecting rods;

the measuring rod is formed by connecting a scale section, a thread section and a contact section which are coaxial; the scale sections are of a cylindrical symmetrical structure, four groups of scales are uniformly marked on the side surface of the cylinder along the circumferential direction, each group of scales is composed of two adjacent staggered rows of scales on the left and right, the dislocation value of the two staggered rows of scales is 0.5mm, and the minimum cell value of the staggered scales is 1 mm; the thread section is a cylindrical symmetrical structure with threads on the side surface and is used for screwing the first screw hole or the third screw hole, and the thread pitch value of the threads of the thread section is 0.5 mm; the contact section is of a hemispheroid symmetrical structure and is used for contacting the inner surface and the outer surface of the steel pipe;

the connecting rod is of a cuboid symmetrical structure; a cylindrical ninth through hole is formed in each of two ends of the connecting rod, and the hinge penetrates through the ninth through hole;

the baffle is of a cuboid-shaped symmetrical structure, two cylindrical third through holes are symmetrically formed in the baffle, and the second screws penetrate through the third through holes;

the first screw is formed by connecting a fourth main body and a fourth auxiliary body which are coaxial, the fourth main body and the fourth auxiliary body are both in cylindrical symmetrical structures, and the fourth auxiliary body is positioned on the right end face of the fourth main body; the side surface of the fourth auxiliary body is provided with threads for screwing a fourth screw hole of the screwing block; a second rectangular through groove is formed in the left end of the fourth main body so that the first screw can be screwed conveniently;

the second screw is formed by connecting a fifth main body and a fifth auxiliary body which are coaxial, the fifth main body and the fifth auxiliary body are both cylindrical symmetrical structures, and the fifth auxiliary body is positioned on the lower end face of the fifth main body; the side surface of the fifth auxiliary body is provided with threads for screwing a second screw hole of the third bracket; a third rectangular through groove is formed in the upper end of the fifth main body, so that the second screw can be conveniently screwed;

the screwing block is of a cuboid symmetrical structure, a fourth screw hole is formed in the center of the screwing block, and the first screw is screwed in the fourth screw hole;

the bulb, the battery, the spring, the hinge, the screw and the nut are standard parts.

The device for measuring the wall thickness of the steel pipe based on the torsional mode comprises two first supports, two second supports, two third supports, a fourth support, sixteen measuring rods, eight connecting rods, four baffle plates, eight first screws, eight second screws, eight screwing blocks, sixteen hinges, four bulbs, four batteries, four springs, sixteen screw rods and sixteen nuts.

When the device is used, sixteen measuring rods are all screwed to the zero scale position, eight connecting rods are twisted in the negative direction along eight hinges arranged in an eighth through hole in a penetrating mode, one part of a fourth support is arranged in a steel pipe in a penetrating mode, eight connecting rods are twisted in the positive direction along the eight hinges arranged in the eighth through hole in a penetrating mode, eight first screws are simultaneously contacted with the inner wall of the steel pipe, a and d are screwed in the first screw holes of the two first supports respectively, b and c are screwed in the third screw holes of the fourth support respectively, and four contact sections of the four measuring rods are contacted with the inner wall and the outer wall of the steel pipe; the distance w between the first body and the sixth body, the radius r of the contact section, are measured by reading Δ a, Δ b, Δ c and Δ d, and therefore the operation of the device of the utility model is relatively simple.

The device is designed based on a symmetrical structure, and the baffle, the third bracket and the second screw are used in a combined manner, so that two ends of a fifth through hole of the third bracket can be sealed; the first screw, the screwing block, the battery, the bulb and the spring are used together to form a working circuit; the two first screws and the steel pipe are used in a combined mode, and a switch can be formed; the third support, the connecting rod and the fourth support are used in a combined mode, so that the first screw can be used for centering the inner wall of the steel pipe; sixteen scale sections of sixteen measuring rods, eight first auxiliary bodies of the two first supports and eight sixth auxiliary bodies of the fourth support are combined for use, sixteen micrometer screw gauges can be formed, and accordingly the wall thickness of the steel pipe can be accurately measured.

The device for measuring the wall thickness of the steel pipe based on the torsion can quickly center the inner wall of the steel pipe, and further can effectively measure the wall thickness of the steel pipe.

Drawings

FIG. 1 is a schematic structural diagram of a front view of a device for measuring the wall thickness of a steel pipe based on torsion of the present invention;

FIG. 2 is a schematic left-side view of the device for measuring the wall thickness of a steel pipe based on torsion of the present invention;

FIG. 3 is a schematic top view of the device for measuring the wall thickness of a steel pipe based on torsion of the present invention;

FIG. 4 is a schematic structural view of the device for measuring the wall thickness of a steel pipe based on torsion according to the present invention in a front view when centering the steel pipe;

FIG. 5 is a schematic left-side view structural diagram of the device for measuring the wall thickness of a steel pipe based on torsion of the present invention when measuring the wall thickness of the steel pipe;

FIG. 6 is a schematic view of the assembly of the baffle, third bracket, splice block, battery, bulb, spring, first screw and second screw of the present invention;

FIG. 7 is a left side view of the first bracket of the present invention;

FIG. 8 is a schematic top view of a first bracket of the present invention;

FIG. 9 is a schematic view of the measuring rod of the present invention;

FIG. 10 is a front view of a second bracket of the present invention;

FIG. 11 is a schematic top view of a second bracket of the present invention;

FIG. 12 is a schematic top view of the baffle of the present invention;

FIG. 13 is a front view of a third bracket of the present invention;

FIG. 14 is a left side view of a third bracket of the present invention;

FIG. 15 is a schematic top view of a third bracket of the present invention;

FIG. 16 is a front view of a first screw of the present invention;

FIG. 17 is a front view of a second screw of the present invention;

FIG. 18 is a front view of a fourth bracket of the present invention;

FIG. 19 is a left side view of a fourth stent of the present invention;

FIG. 20 is a schematic top view of a fourth bracket of the present invention;

FIG. 21 is a cross-sectional view taken along plane M-M of a fourth stent of the present invention;

FIG. 22 is a left side view schematic of the twist block of the present invention;

FIG. 23 is a schematic top view of the connecting rod of the present invention;

FIG. 24 is a schematic diagram of the working circuit configuration of the device for measuring the wall thickness of a steel pipe based on torsion of the present invention;

FIG. 25 is a schematic view showing the operation principle of the device for measuring the wall thickness of a steel pipe by torsion according to the present invention.

Description of reference numerals: 1-a first scaffold; 101-a first appendage; 102-a first body; 103-a first via; 104-a first screw hole; 2-measuring rod; 201-scale section; 202-a threaded section; 203-a contact section; 3-a second scaffold; 301-a second body; 302-a second appendage; 303-a second via; 4-a baffle plate; 401-a third via; 5-a third support; 501-a first through groove; 502-a third body; 503-a third appendage; 504-fourth via; 505-a second screw hole; 506-a fifth via; 507-sixth through holes; 6-a first screw; 601-fourth appendage; 602-a fourth body; 603-a second through slot; 7-a second screw; 701-the fifth appendage; 702-a fifth body; 703-a third through slot; 8-a fourth scaffold; 801-sixth appendage; 802-a sixth body; 803-seventh appendage; 804-eighth appendage; 805-ninth appendage; 806-a fourth through slot; 807-third screw holes; 808-a seventh via; 809-an eighth via; 9-screwing the block; 901-a fourth screw hole; 10-a connecting rod; 1001-ninth via; 11-hinging; 12-a screw; 13-a nut; 14-a bulb; 15-a battery; 16-a spring; 17-steel pipe.

Detailed Description

The present invention will be described in detail below with reference to examples and drawings, which are provided for understanding the present invention and are not intended to limit the present invention.

As shown in fig. 1 to 6, the device for measuring the wall thickness of a steel pipe based on a torsional mode provided by the utility model comprises two first supports 1, two second supports 3, two third supports 5, a fourth support 8, sixteen measuring rods 2, eight connecting rods 10, four baffles 4, eight first screws 6, eight second screws 7, eight screwing blocks 9, sixteen hinges 11, four bulbs 14, four batteries 15, four springs 16, sixteen screws 12 and sixteen nuts 13, wherein the baffles 4 and the third supports 5 are made of insulating materials, and the rest parts can be made of metal materials.

As shown in fig. 7 and 8, the first bracket 1 is formed by connecting a first main body 102 and four first auxiliary bodies 101, wherein the four first auxiliary bodies 101 are located on the upper end surface of the first main body 102; the first body 102 is a cuboid symmetrical structure, four cylindrical first through holes 103 are symmetrically formed in the first body 102, the screw 12 penetrates through the first through holes 103, and one end of the screw 12 can be screwed with the nut 13; the first auxiliary bodies 101 are of cylindrical symmetrical structures, and fifty grid scales are uniformly marked on the side surface of each first auxiliary body 101 along the circumferential direction; the axial line of each first auxiliary body 101 is provided with a first screw hole 104, the measuring rod 2 is screwed in the first screw hole 104, and the first screw hole 104 also penetrates through the first main body 102.

As shown in fig. 10 and 11, the second bracket 3 is formed by connecting two second main bodies 301 and a second auxiliary body 302, the second main bodies 301 and the second auxiliary body 302 are both of a rectangular parallelepiped symmetrical structure, and the second auxiliary body 302 is located between the two second main bodies 301; each second main body 301 is symmetrically provided with four cylindrical second through holes 303, and the screw 12 penetrates through the second through holes 303.

As shown in fig. 13 to 15, the third bracket 5 is formed by connecting a third main body 502 and eight third auxiliary bodies 503, the third main body 502 and the third auxiliary bodies 503 are both rectangular parallelepiped symmetrical structures, and the eight third auxiliary bodies 503 are divided into four groups and are located on one end face of the third main body 502; a first through groove 501 in a rectangular parallelepiped shape can be formed between the two third auxiliary bodies 503 of each group, and the connecting rod 10 is inserted into the first through groove 501; each third auxiliary body 503 is provided with a cylindrical fourth through hole 504, and the hinge 11 penetrates through the fourth through hole 504; the third body 502 is symmetrically provided with two cuboid-shaped fifth through holes 506, and the screwing block 9, the battery 15, the bulb 14 and the spring 16 are arranged in the fifth through holes 506 in a penetrating manner; two groups of six cylindrical sixth through holes 507 are symmetrically formed in the third main body 502, the first screws 6 penetrate through the sixth through holes 507, and each sixth through hole 507 is communicated with the corresponding fifth through hole 506; two second screw holes 505 are respectively formed in the upper and lower end surfaces of the third body 502, and the second screws 7 are screwed into the second screw holes 505.

As shown in fig. 18 to 21, the fourth bracket 8 is formed by connecting two sixth main bodies 802, eight sixth auxiliary bodies 801, two seventh auxiliary bodies 803, sixteen eighth auxiliary bodies 804 and two ninth auxiliary bodies 805, where the sixth main bodies 802, the seventh auxiliary bodies 803, the eighth auxiliary bodies 804 and the ninth auxiliary bodies 805 are each a rectangular parallelepiped symmetrical structure, two seventh auxiliary bodies 803 are located between the two sixth main bodies 802, the sixteen eighth auxiliary bodies 804 are divided into eight groups and located on the left and right end faces of the two seventh auxiliary bodies 803, respectively, and the two ninth auxiliary bodies 805 are located between the two seventh auxiliary bodies 803; a rectangular fourth through-slot 806 can be formed between the two eighth auxiliary bodies 804 of each group, and the connecting rod 10 is inserted into the fourth through-slot 806; the sixth auxiliary bodies 801 are cylindrical symmetrical structures, and fifty grid scales are uniformly marked on the side surface of each sixth auxiliary body 801 along the circumferential direction; a third screw hole 807 is formed in the axial position of each sixth auxiliary body 801, and the measuring rod 2 is screwed in the third screw hole 807; the third screw hole 807 also penetrates through the sixth body 802; each sixth main body 802 is symmetrically provided with four cylindrical seventh through holes 808, and the screw 12 penetrates through the seventh through holes 808; each eighth auxiliary body 804 is provided with an eighth cylindrical through hole 809, and the hinge 11 penetrates through the eighth through hole 809; the upper end face of each ninth auxiliary body 805 is marked with a group of scales so as to determine the positions of eight connecting rods 10.

As shown in fig. 9, the measuring rod 2 is formed by connecting three coaxial portions, namely a scale section 201, a thread section 202 and a contact section 203; the scale section 201 is of a cylindrical symmetrical structure, four groups of scales are uniformly marked on the side surface of the cylinder along the circumferential direction, each group of scales is composed of two adjacent staggered scales on the left and right, the staggered value of the two staggered scales is 0.5mm, and the minimum grid value of the staggered scales is 1 mm; the threaded section 202 is a cylindrical symmetrical structure with threads on the side surface, and is used for screwing the first screw hole 104 or the third screw hole 807, and the thread pitch value of the threads of the threaded section 202 is 0.5 mm; the contact section 203 is a hemispheroid symmetrical structure and is used for contacting the inner surface and the outer surface of the steel pipe 17.

As shown in fig. 23, the connecting rod 10 has a rectangular parallelepiped symmetrical structure; two ends of the connecting rod 10 are respectively provided with a cylindrical ninth through hole 1001, and the hinge 11 is inserted into the ninth through hole 1001.

Referring to fig. 12, the baffle 4 has a rectangular symmetrical structure, two cylindrical third through holes 401 are symmetrically formed in the baffle 4, and the second screws 7 are inserted into the third through holes 401.

As shown in fig. 16, the first screw 6 is formed by coaxially connecting a fourth main body 602 and a fourth auxiliary body 601, where the fourth main body 602 and the fourth auxiliary body 601 are both cylindrical and symmetrical structures, and the fourth auxiliary body 601 is located on the right end face of the fourth main body 602; the side surface of the fourth auxiliary body 601 is provided with threads for screwing a fourth screw hole 901 of the screwing block 9; a second through slot 603 in a rectangular shape is formed at the left end of the fourth main body 602 to facilitate screwing the first screw 6.

As shown in fig. 17, the second screw 7 is formed by connecting a fifth main body 702 and a fifth auxiliary body 701, which are coaxial, wherein the fifth main body 702 and the fifth auxiliary body 701 are both cylindrical and symmetrical structures, and the fifth auxiliary body 701 is located on the lower end surface of the fifth main body 702; the side surface of the fifth auxiliary body 701 is provided with threads for screwing the second screw hole 505 of the third bracket 5; the upper end of the fifth body 702 is provided with a third through slot 703 in the shape of a rectangular parallelepiped for conveniently screwing the second screw 7.

As shown in fig. 22, the screwing block 9 is a rectangular symmetrical structure, a fourth screw hole 901 is formed in the center of the screwing block 9, and the first screw 6 is screwed into the fourth screw hole 901.

The utility model provides an assembly method of a device for measuring the wall thickness of a steel pipe based on a torsion mode, which comprises the following steps:

as shown in fig. 1 to 23, the two second brackets 3 are first respectively disposed on the two sixth main bodies 802 of the fourth bracket 8, then the eight second through holes 303 of the two second brackets 3 located at the inner side and the eight seventh through holes 808 of the fourth bracket 8 are aligned, then one screw 12 is respectively inserted into the through holes of the eight pairs, and then one nut 13 is respectively screwed onto the other ends of the eight screws 12, so that the two second brackets 3 and the fourth bracket 8 can be assembled;

then, the two first brackets 1 are respectively arranged on the two second brackets 3, then the eight first through holes 103 of the two first brackets 1 and the eight second through holes 303 of the two second brackets 3 which are positioned at the outer sides are aligned, then the screw rods 12 are respectively arranged in the through holes of the eight groups of aligned through holes in a penetrating manner, and then the nuts 13 are respectively screwed on the other ends of the eight screw rods 12, so that the two first brackets 1 and the two second brackets 3 can be assembled;

then, the two baffle plates 4 are respectively arranged on the lower end surfaces of the two third brackets 5, then four third through holes 401 of the two baffle plates 4 and four second screw holes 505 of the two third brackets 5 at the lower ends are aligned, and then four second screws 7 are threaded through the four third through holes 401 and screwed into the four second screw holes 505, so that the two baffle plates 4 and the two third brackets 5 can be assembled;

then, the eight screwing blocks 9, the four springs 16, the four bulbs 14 and the four batteries 15 are respectively arranged in the four fifth through holes 506 of the two third brackets 5 in a penetrating manner, then the other two baffle plates 4 are respectively arranged on the upper end surfaces of the two third brackets 5, then the four third through holes 401 of the two baffle plates 4 and the four second screw holes 505 at the upper ends of the two third brackets 5 are aligned, and then the other four second screws 7 are screwed into the four second screw holes 505 after penetrating through the four third through holes 401, so that the eight screwing blocks 9, the four springs 16, the four bulbs 14, the four batteries 15, the two third brackets 5 and the other two baffle plates 4 can be assembled;

then, one end of each of the eight connecting rods 10 is respectively inserted into the eight fourth through grooves 806 of the fourth bracket 8, then the eight ninth through holes 1001 of the eight connecting rods 10 are aligned with the sixteen eighth through holes 809 of the fourth bracket 8, and then one hinge 11 is respectively installed in each of the eight aligned through holes, so that one end of each of the eight connecting rods 10 and the fourth bracket 8 can be assembled;

then, the other ends of the eight connecting rods 10 are respectively inserted into the eight first through grooves 501 of the two third brackets 5, then the other eight ninth through holes 1001 of the eight connecting rods 10 are aligned with the sixteen fourth through holes 504 of the two third brackets 5, and then the hinges 11 are respectively installed in the through holes of the eight pairs, so that the other ends of the eight connecting rods 10 and the two third brackets 5 can be assembled;

then eight measuring rods 2 are screwed into eight first screw holes 104 of two first brackets 1, then eight other measuring rods 2 are screwed into eight third screw holes 807 of a fourth bracket 8, and finally eight first screws 6 are screwed into eight fourth screw holes 901 of eight screwing blocks 9 through eight sixth through holes 507, so that the whole device is assembled and can be put into use.

The utility model provides a device for measuring the wall thickness of a steel pipe based on a torsional mode, which has the working principle that:

setting a working circuit: the baffle 4 and the third bracket 5 are both made of insulating materials, the first screw 6 and the screwing block 9 are both made of metal materials, the battery 15 can be used as a power supply, the bulb 14 can be used as an electric appliance capable of emitting light, the screwing block 9 and the spring 16 can be used as connecting wires, and the combined use of the two first screws 6 and the steel pipe 17 can be used as a switch; when two first screws 6 penetrating through the same fifth through hole 506 simultaneously contact the steel tube 17, the working circuit can be switched on, and the light bulb 14 starts to emit light; when the two first screws 6 inserted into the same fifth through hole 506 leave the steel pipe 17, the two first screws 6 isolated from each other can cut off the working circuit, as shown in fig. 24.

As shown in fig. 25, for convenience of description, the four measuring rods 2 closest to the steel pipe 17 are not designated as a, b, c, and d, and the distance between the two first main bodies 102 of the two first brackets 1 and the two sixth main bodies 802 of the fourth bracket 8 is not designated as w; for convenience of measurement, the radius of the contact section 203 of the measuring rod 2 is not set to be r, and sixteen contact sections 203 of the measuring rod 2 located at the zero scale position just extend out completely, that is, the extending lengths of a, b, c and d are all r; according to the knowledge point that the symmetry axes of the inscribed rectangles of the circles are necessarily distributed along the radial direction, the device is designed by adopting a symmetrical structure, so that the arrangement of the a, the b, the c and the d along the radial direction of the steel pipe 17 can be ensured;

as shown in fig. 25, a, b, c, and d are provided along the radial direction of the steel pipe 17, and when the wall thickness of the steel pipe 17 is measured, a, d and the steel pipe 17 are in an circumscribed relation, b, c and the steel pipe 17 are in an inscribed relation, and the wall thickness measured by a and b is set so that the precession lengths of a, b, c, and d are not set to Δ a, Δ b, Δ c, and Δ d, respectively, but the wall thickness measured by b, and b is set to Δ a

Setting the wall thickness measured by c and d as

From this knowledge point that the distance between parallel planes is everywhere equal, the following two equations can be derived:

after finishing, the following two equations can be obtained:

as shown in fig. 25, the sixteen scale sections 201 of the sixteen measuring rods 2, the eight first auxiliary bodies 101 of the two first supports 1, and the eight sixth auxiliary bodies 801 of the fourth support 8 are used in combination to form sixteen spiral micrometers, and the measurement accuracy of the sixteen spiral micrometers can reach 0.01mm, and the reasoning process is as follows: since the thread pitch of the thread section 202 of the measuring rod 2 is 0.5mm, that is, the axial distance moved by the measuring rod 2 every time the measuring rod rotates one circle is 0.5mm, fifty division scales are uniformly marked on the side surfaces of the first auxiliary body 101 and the sixth auxiliary body 801 along the circumferential direction, and therefore, the axial distance moved by the measuring rod 2 within the first screw hole 104 and the third screw hole 807 is 0.01mm every time the measuring rod 2 rotates one division scale.

The utility model provides a device for measuring the wall thickness of a steel pipe based on a torsional mode, which comprises the following steps:

step 1: firstly, sixty measurement rods 2 are all screwed to a zero scale position, then eight connecting rods 10 are negatively twisted along eight hinges 11 penetrating through eight through holes 809 of the fourth support 8 so as to enable two third supports 5 to approach each other, then a part of the fourth support 8 is penetrated through the steel pipe 17, then eight connecting rods 10 are positively twisted along eight hinges 11 penetrating through eight through holes 809 of the fourth support 8 so as to enable two third supports 5 to be far away from each other, and when eight first screws 6 are all contacted with the inner wall of the steel pipe 17, the eight connecting rods 10 are stopped being twisted so as to center the steel pipe 17, as shown in fig. 4;

step 2: then, the a and the d are slowly screwed along the first screw holes 104 of the two first brackets 1, and then the b and the c are slowly screwed along the third screw holes 807 of the fourth bracket 8, so that the four contact sections 203 of the four measuring rods 2 are respectively contacted with the inner wall or the outer wall of the steel pipe 17; then Δ a, Δ b, Δ c and Δ d are read, respectively, and then the distance w between the first body 102 and the sixth body 802, the radius r of the contact section 203 of the measuring rod 2 are precisely measured, by the formula

The steel pipe 17 can be calculated

Location and

wall thickness of the site

And wall thickness

As shown in fig. 25.

Supplementary explanation: sixteen scale sections 201 of sixteen measuring rods 2, initial scales of eight first auxiliary bodies 101 of two first supports 1 and initial scales of eight sixth auxiliary bodies 801 of the fourth support 8 are kept in alignment, so that the effectiveness of measurement is guaranteed; for convenience of description of the twisting directions of the eight links 10, it is not possible to set the twisting direction in which the two third brackets 5 can be moved closer to each other to a negative direction and set the twisting direction in which the two third brackets 5 can be moved away from each other to a positive direction; the fact that four light bulbs 14 can emit light at the same time means that eight first screws 6 simultaneously contact the inner wall of the steel pipe 17, and at this time, eight connecting rods 10 on the left and right sides should display the same scale on the ninth auxiliary body 805 of the fourth bracket 8.

The embodiment shows that the device for measuring the wall thickness of the steel pipe based on the torsion mode can quickly center the inner wall of the steel pipe 17, and further can effectively measure the wall thickness of the steel pipe 17.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (1)

1. The utility model provides a device based on steel pipe wall thickness is measured to torsional mode which characterized in that, the device based on steel pipe wall thickness is measured to torsional mode includes: the device comprises two first supports (1), two second supports (3), two third supports (5), a fourth support (8), sixteen measuring rods (2), eight connecting rods (10), four baffles (4), eight first screws (6), eight second screws (7), eight screwing blocks (9), sixteen hinges (11), four bulbs (14), four batteries (15), four springs (16), sixteen screw rods (12) and sixteen nuts (13); wherein:

the first bracket (1) is formed by connecting a first main body (102) and four first auxiliary bodies (101), wherein the four first auxiliary bodies (101) are positioned on the upper end surface of the first main body (102); the first main body (102) is of a cuboid-shaped symmetrical structure, four cylindrical first through holes (103) are symmetrically formed in the first main body (102), the screw rod (12) penetrates through the first through holes (103), and one end of the screw rod (12) is screwed with the nut (13); the first auxiliary bodies (101) are of cylindrical symmetrical structures, and fifty grid scales are uniformly marked on the side surface of each first auxiliary body (101) along the circumferential direction; a first screw hole (104) is formed in the axis position of each first auxiliary body (101), the measuring rod (2) is screwed in the first screw hole (104), and the first screw hole (104) also penetrates through the first main body (102);

the second bracket (3) is formed by connecting two second main bodies (301) and a second auxiliary body (302), the second main bodies (301) and the second auxiliary body (302) are both in a cuboid-shaped symmetrical structure, and the second auxiliary body (302) is positioned between the two second main bodies (301); each second main body (301) is symmetrically provided with four cylindrical second through holes (303), and the screw (12) penetrates through the second through holes (303);

the third bracket (5) is formed by connecting a third main body (502) and eight third auxiliary bodies (503), the third main body (502) and the third auxiliary bodies (503) are both in a cuboid-shaped symmetrical structure, and the eight third auxiliary bodies (503) are divided into four groups and are simultaneously positioned on one end face of the third main body (502); a first through groove (501) in a rectangular shape can be formed between the two third auxiliary bodies (503) of each group, and the connecting rod is arranged in the first through groove (501) in a penetrating manner; each third auxiliary body (503) is provided with a cylindrical fourth through hole (504), and the hinge (11) penetrates through the fourth through hole (504); the third main body (502) is symmetrically provided with two cuboid fifth through holes (506), and the screwing block (9), the battery (15), the bulb (14) and the spring (16) penetrate through the fifth through holes (506); two groups of six cylindrical sixth through holes (507) are symmetrically formed in the third main body (502), the first screw (6) penetrates through the sixth through holes (507), and each sixth through hole (507) is communicated with the corresponding fifth through hole (506); two second screw holes (505) are respectively formed in the upper end face and the lower end face of the third main body (502), and the second screws (7) are screwed in the second screw holes (505);

the fourth bracket (8) is formed by connecting two sixth main bodies (802), eight sixth auxiliary bodies (801), two seventh auxiliary bodies (803), sixteen eighth auxiliary bodies (804) and two ninth auxiliary bodies (805), wherein the sixth main bodies (802), the seventh auxiliary bodies (803), the eighth auxiliary bodies (804) and the ninth auxiliary bodies (805) are all rectangular symmetrical structures, the two seventh auxiliary bodies (803) are located between the two sixth main bodies (802), the sixteen eighth auxiliary bodies (804) are divided into eight groups and are respectively located on the left end face and the right end face of the two seventh auxiliary bodies (803), and the two ninth auxiliary bodies (805) are located between the two seventh auxiliary bodies (803); a fourth through groove (806) in a cuboid shape can be formed between the two eighth auxiliary bodies (804) of each group, and the connecting rod (10) penetrates through the fourth through groove (806); the sixth auxiliary bodies (801) are of cylindrical symmetrical structures, and fifty grid scales are uniformly marked on the side surface of each sixth auxiliary body (801) along the circumferential direction; a third screw hole (807) is formed in the axis position of each sixth auxiliary body (801), and the measuring rod (2) is screwed in the third screw hole (807); the third screw hole (807) also penetrates through the sixth body (802); each sixth main body (802) is symmetrically provided with four cylindrical seventh through holes (808), and the screw rod (12) penetrates through the seventh through hole (808); each eighth auxiliary body (804) is provided with a cylindrical eighth through hole (809), and the hinge (11) penetrates through the eighth through hole (809); the upper end surface of each ninth auxiliary body (805) is marked with a group of scales so as to determine the positions of eight connecting rods (10);

the measuring rod (2) is formed by connecting a scale section (201), a thread section (202) and a contact section (203) which are coaxial; the scale section (201) is of a cylindrical symmetrical structure, four groups of scales are uniformly marked on the side surface of the cylinder along the circumferential direction, each group of scales is composed of two adjacent rows of staggered scales on the left and right, the staggered value of the two rows of staggered scales is 0.5mm, and the minimum grid value of the staggered scales is 1 mm; the threaded section (202) is a cylindrical symmetrical structure with threads on the side surface and is used for screwing the first screw hole (104) or the third screw hole (807), and the thread pitch value of the threads of the threaded section (202) is 0.5 mm; the contact section (203) is of a hemispheroid symmetrical structure and is used for contacting the inner surface and the outer surface of the steel pipe;

the connecting rod (10) is of a cuboid symmetrical structure; a cylindrical ninth through hole (1001) is respectively formed in each of two ends of the connecting rod (10), and the hinge (11) penetrates through the ninth through hole (1001);

the baffle (4) is of a cuboid symmetrical structure, two cylindrical third through holes (401) are symmetrically formed in the baffle (4), and the second screws (7) penetrate through the third through holes (401);

the first screw (6) is formed by connecting a fourth main body (602) and a fourth auxiliary body (601) which are coaxial, the fourth main body (602) and the fourth auxiliary body (601) are both in a cylindrical symmetrical structure, and the fourth auxiliary body (601) is positioned on the right end face of the fourth main body (602); the side surface of the fourth auxiliary body (601) is provided with threads for screwing a fourth screw hole (901) of the screwing block (9); a second rectangular through groove (603) is formed in the left end of the fourth main body (602) so that the first screw (6) can be screwed conveniently;

the second screw (7) is formed by connecting a fifth main body (702) and a fifth auxiliary body (701) which are coaxial, the fifth main body (702) and the fifth auxiliary body (701) are both in a cylindrical symmetrical structure, and the fifth auxiliary body (701) is positioned on the lower end face of the fifth main body (702); the side surface of the fifth auxiliary body (701) is provided with threads for screwing a second screw hole (505) of the third bracket (5); a third rectangular through groove (703) is formed in the upper end of the fifth main body (702) to facilitate screwing of the second screw (7);

the screwing block (9) is of a cuboid symmetrical structure, a fourth screw hole (901) is formed in the center of the screwing block (9), and the first screw (6) is screwed in the fourth screw hole (901);

the bulb (14), the battery (15), the spring (16), the hinge (11), the screw (12) and the nut (13) are all standard parts.

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