CN219083971U - Device for measuring inner diameter of rectangular steel pipe based on vertical direction - Google Patents

Abstract

The utility model discloses a device for measuring the inner diameter of a rectangular steel pipe based on an upright direction, and belongs to the technical field of steel pipe measurement. The device based on erect direction measurement rectangle steel pipe internal diameter that provides includes a first support, two second supports, four third supports, eight first screws, thirty-two second screws, four third screws, sixteen locating lever, sixteen measuring levers, two extension boards, a bottom plate, eight linear bearings, two first connective bars, two second connective bars, four screws and four nuts, can fix a position the internal surface of rectangle steel pipe fast, and then realize effectual measurement to can calculate the internal diameter of rectangle steel pipe, and have low in manufacturing cost, easy operation, measurement accuracy height's characteristics.

Description

Device for measuring inner diameter of rectangular steel pipe based on vertical direction

Technical Field

The utility model belongs to the technical field of steel pipe measurement, and particularly relates to a device for measuring the inner diameter of a rectangular steel pipe based on an upright direction.

Background

Currently, enterprises generally adopt a hot rolling perforation and continuous pipe rolling mode to produce steel pipes; compared with the sectional materials with other sections, the steel pipe has relatively high bending resistance and torsion resistance; compared with a round steel pipe, the rectangular steel pipe has relatively high stress area and stable structural performance, so that the rectangular steel pipe is widely applied to the fields of mechanical manufacturing and structural engineering. The external dimension of the rectangular steel pipe directly influences the usability and the processability of the rectangular steel pipe, so that a plurality of machining industries taking the rectangular steel pipe as a raw material have strict requirements on the inner diameter of the rectangular steel pipe, and a vernier caliper is generally adopted to measure the inner diameter of the rectangular steel pipe, and the device for specially measuring the inner diameter of the rectangular steel pipe is relatively few.

Patent document CN2705773Y discloses an inner diameter measuring device which mainly comprises a positioner, a positioning ball, a positioning column, a sliding sleeve, a measuring ball, a variable length measuring rod and a measuring meter, and the measuring reliability of the device is relatively poor.

Patent document CN103047912a discloses a digital display inside diameter detection micrometer, the device mainly comprises a fixed elbow measuring frame, a movable elbow measuring frame, an elbow positioning screw and a transmission device, two digital display inside diameter micrometers are combined in parallel, and the maximum value and the minimum value of the inside diameter of a steel pipe can be measured at the same time, but because the device does not have a positioning function, the measurement reliability of the device is relatively poor.

Patent document CN201335669Y discloses an inside diameter measuring device which is mainly composed of a scale frame, an anvil, a differential measuring head, a connecting bush, a fixing sleeve, an upper connecting rod and a lower connecting rod, and has relatively poor measuring reliability because the device does not have a positioning function.

Disclosure of Invention

The utility model provides a device for measuring the inner diameter of a rectangular steel pipe based on an upright direction, which comprises a first bracket, two second brackets, four third brackets, eight first screws, thirty-two second screws, four third screws, sixteen positioning rods, sixteen measuring rods, two support plates, a bottom plate, eight linear bearings, two first connecting rods, two second connecting rods, four screws and four nuts, wherein the first bracket is a hollow structure; wherein:

the first bracket is made of metal materials and is formed by connecting a first main body and a first auxiliary body, and the first auxiliary body is positioned on the upper end face 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, and the screw rod penetrates through the first through holes; the first auxiliary body is of a regular octagon symmetrical structure, a rectangular steel pipe is sleeved outside the first auxiliary body, a regular octagon second through hole is formed in the axis of the first auxiliary body, and the second through hole penetrates through the first main body at the same time;

the second bracket is made of metal materials and is formed by connecting two third main bodies, four third auxiliary bodies, one fourth auxiliary body and eight fifth auxiliary bodies, wherein the four third auxiliary bodies are respectively positioned on the upper end face and the lower end face of the two third main bodies, the fourth auxiliary body is positioned between the two third main bodies, and the eight fifth auxiliary bodies are respectively positioned on the four end faces of the four third auxiliary bodies which are oppositely arranged; the third main body, the third auxiliary body and the fourth auxiliary body are of cuboid symmetrical structures, a cylindrical fifth through hole is formed in the center of the third main body, and the linear bearing is arranged in the fifth through hole in a penetrating mode; four second screw holes are symmetrically formed in the periphery of the fifth through hole, and the second screws are screwed into the second screw holes; the fifth auxiliary body is of a cylindrical symmetrical structure, and fifty division scales are uniformly marked on the side surface of the fifth auxiliary body along the circumferential direction; a third screw hole is formed in the axis position of the fifth auxiliary body, the measuring rod is screwed into the third screw hole, and the third screw hole penetrates through the third auxiliary body at the same time;

the third bracket is made of metal materials and is formed by connecting a fourth main body and a sixth auxiliary body, and the sixth auxiliary body is positioned on the right end face of the fourth main body; the fourth main body is of a cuboid symmetrical structure, a fourth screw hole is formed in one end face of the fourth main body, and the third screw is screwed into the fourth screw hole; a cylindrical sixth through hole is formed in the axis position of the fourth screw hole, and the second connecting rod is arranged in the sixth through hole in a penetrating mode; the upper end face and the lower end face of the fourth main body are respectively provided with a fifth screw hole, and the first screw is screwed into the fifth screw holes; the sixth auxiliary body is of a cylindrical symmetrical structure, a cylindrical groove is formed in the axis position of the sixth auxiliary body, and the first connecting rod penetrates through the groove;

the first screw is made of metal materials and is formed by connecting a second main body and a second auxiliary body which are coaxial, the second main body and the second auxiliary body are of cylindrical symmetrical structures, and the second auxiliary body is positioned on the lower end face of the second main body; the end part of the second auxiliary body is provided with threads for screwing the fifth screw hole of the third bracket; the upper end of the second main body is provided with a first cuboid through groove so as to facilitate screwing the first screw;

the second screw is made of metal materials and is formed by connecting a sixth main body and an eighth auxiliary body which are coaxial, the sixth main body and the eighth auxiliary body are of cylindrical symmetrical structures, and the eighth auxiliary body is positioned on the right end face of the sixth main body; the end part of the eighth auxiliary body is provided with threads for screwing the second screw hole of the second bracket; a cuboid second through groove is formed in the left end of the sixth main body so as to facilitate screwing of the second screw;

the third screw is made of metal materials and is formed by connecting a seventh main body and a ninth auxiliary body which are coaxial, the seventh main body and the ninth auxiliary body are of cylindrical symmetrical structures, and the ninth auxiliary body is positioned on the right end face of the seventh main body; the end part of the ninth auxiliary body is provided with threads for screwing the fourth screw hole of the third bracket;

the positioning rod is made of metal materials and is formed by connecting a first contact section, a first thread section and a second contact section which are coaxial; the first thread section is of a cylindrical symmetrical structure with threads on the side surface and is used for screwing the first screw hole of the support plate; the first contact section and the second contact section are of cylindrical symmetrical structures and are used for contacting the inner surface of the rectangular steel pipe;

the measuring rod is made of metal materials and is formed by connecting a third coaxial contact section, a second threaded section and a scale section; the third contact section is of a hemispherical symmetrical structure and is used for contacting the inner surface of the rectangular steel pipe; the second thread section is of a cylindrical symmetrical structure with threads arranged on the side surface and is used for screwing the third screw hole of the second bracket, and the pitch value of the threads is 0.5mm; 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 consists of two adjacent left and right staggered scales, the staggered value of the two staggered scales is 0.5mm, and the minimum division value of the staggered scales is 1mm;

the support plate is made of metal materials and is of a cuboid symmetrical structure, four cylindrical third through holes are symmetrically formed in the support plate, and the first screws penetrate through the third through holes; a fourth cuboid through hole is formed in the center of the support plate, and the second support is arranged in the fourth through hole in a penetrating mode; two first screw holes are respectively formed in the four end faces of the support plate, and the positioning rods are screwed into the first screw holes; the end surfaces of the support plates are respectively marked with a group of scales so as to be capable of calibrating the position of the second support;

the bottom plate is made of metal materials and is of a cuboid symmetrical structure, four cylindrical ninth through holes are symmetrically formed in the bottom plate, the screw rod penetrates through the ninth through holes, and the nut is screwed at the threaded end of the screw rod;

the linear bearing is made of metal materials and is formed by connecting a fifth main body and a seventh auxiliary body, and the seventh auxiliary body is positioned on the right end face of the fifth main body; the seventh auxiliary body is of a cylindrical symmetrical structure; a cylindrical seventh through hole is formed in the axis position of the seventh auxiliary body, the first connecting rod or the second connecting rod is penetrated in the seventh through hole, and the seventh through hole penetrates through the fifth main body at the same time; a retainer, balls and check rings are further arranged in the seventh auxiliary body, a plurality of balls are uniformly arranged in the retainer, and the check rings are arranged at two ends of the retainer; the fifth main body is of a cuboid symmetrical structure, four cylindrical eighth through holes are symmetrically formed in the fifth main body, and the second screws penetrate through the eighth through holes;

the first connecting rod is made of metal materials and is of a cylindrical symmetrical structure, the middle part of the first connecting rod is arranged in the seventh through hole of the linear bearing in a penetrating mode, and two ends of the first connecting rod are respectively arranged in the grooves of the third bracket in a penetrating mode;

the second connecting rod is made of metal materials and is of a cylindrical symmetrical structure, the middle part of the second connecting rod is arranged in the seventh through hole of the linear bearing in a penetrating mode, and two ends of the second connecting rod are respectively arranged in the sixth through hole of the third bracket in a penetrating mode;

the screw and the nut are standard components.

The device for measuring the inner diameter of the rectangular steel pipe based on the vertical direction, which is provided by the technical scheme, comprises a first bracket, two second brackets, four third brackets, eight first screws, thirty-two second screws, four third screws, sixteen positioning rods, sixteen measuring rods, two support plates, a bottom plate, eight linear bearings, two first connecting rods, two second connecting rods, four screws and four nuts, and is common in material and convenient to machine and shape, so that the manufacturing cost of the device is relatively low.

When the measuring device is used, the rectangular steel pipe is vertically sleeved on the first bracket, the measuring rods are all screwed to the zero-scale positions, the two support plates are arranged in the positions of the rectangular steel pipe to be measured in a penetrating mode, and sixteen positioning rods are screwed; fixing a second bracket capable of moving left and right at a middle position along the first connecting rod, moving the second bracket back and forth along the second connecting rod to reach a position to be measured, and screwing the eight measuring rods; fixing a second bracket capable of moving forwards and backwards at a middle position along a second connecting rod, moving the second bracket left and right along the first connecting rod to reach a position to be measured, and screwing the eight measuring rods; therefore, the operation process of the device is relatively simple;

the device adopts a symmetrical structure for design, and the combined use of the first bracket and the bottom plate can realize the arrangement of the rectangular steel pipe along the vertical direction; the combined use of the support plate and the positioning rod can realize the accurate positioning of the rectangular steel pipe; the support plate, the third support, the first connecting rod, the second connecting rod and the linear bearing are used in a combined mode, and therefore the second support can move according to a preset track; the combined use of the scale sections of sixteen measuring rods and sixteen fifth auxiliary bodies of two second brackets can form sixteen spiral micrometers, so that the inner diameters of rectangular steel pipes at four different positions can be accurately calculated, and the measuring precision of the device is relatively high;

the device for measuring the inner diameter of the rectangular steel pipe based on the vertical direction can rapidly position the inner surface of the rectangular steel pipe, and further realize effective measurement, so that the inner diameter of the rectangular steel pipe can be calculated.

Drawings

FIG. 1 is a schematic diagram showing a front view structure of an apparatus for measuring an inner diameter of a rectangular steel pipe based on an erection direction of the present utility model;

FIG. 2 is a schematic top view of the apparatus for measuring the inner diameter of a rectangular steel pipe based on the erection direction of the present utility model;

FIG. 3 is a schematic front view of a part of the structure of the device for measuring the inner diameter of a rectangular steel pipe based on the erection direction of the present utility model;

FIG. 4 is a schematic left-hand view of the structure of a part of the apparatus for measuring the inner diameter of a rectangular steel pipe based on the erection direction of the present utility model;

FIG. 5 is a schematic illustration of the relative positions of a second bracket, linear bearing and second screw of the present utility model;

FIG. 6 is a schematic illustration of the relative positions of a second bracket, linear bearing, first connecting rod, second connecting rod, third bracket and third screw of the present utility model;

FIG. 7 is a schematic front view of a first bracket according to the present utility model;

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

FIG. 9 is a schematic left-hand view of a first screw of the present utility model;

FIG. 10 is a schematic top view of the positioning rod of the present utility model;

FIG. 11 is a schematic view of the front view of the support plate of the present utility model;

FIG. 12 is a schematic top view of a support plate according to the present utility model;

FIG. 13 is a schematic diagram showing the front view of the second bracket of the present utility model;

FIG. 14 is a schematic left-hand view of a second bracket of the present utility model;

FIG. 15 is a schematic cross-sectional view of a second bracket of the present utility model along the M-M plane;

FIG. 16 is a schematic top view of a second bracket of the present utility model;

FIG. 17 is a schematic front view of a third bracket according to the present utility model;

FIG. 18 is a right side view of the third bracket of the present utility model;

FIG. 19 is a schematic top view of a third bracket according to the present utility model;

FIG. 20 is a schematic diagram of a front view of a linear bearing of the present utility model;

FIG. 21 is a right side view of a linear bearing of the present utility model;

FIG. 22 is a schematic diagram of the front view of a second screw of the present utility model;

FIG. 23 is a schematic top view of the measuring stick of the present utility model;

FIG. 24 is a schematic left-hand structural view of a third screw of the present utility model;

FIG. 25 is a schematic top view of the base plate of the present utility model;

fig. 26 is a schematic diagram of the working principle of the device for measuring the inner diameter of a rectangular steel pipe based on the vertical direction of the present utility model.

Reference numerals illustrate: 1-a first bracket; 101-a first adjunct; 102-a first body; 103-a first via; 104-a second through hole; 2-a first screw; 201-a second adjunct; 202-a second body; 203-a first through slot; 3-positioning rods; 301-a first contact section; 302-a first thread segment; 303-a second contact section; 4-supporting plates; 401-a first screw hole; 402-a third via; 403-fourth through holes; 5-a second bracket; 501-a second screw hole; 502-fifth through holes; 503-a third adjunct; 504-fourth co-body; 505-a third body; 506-fifth consortium; 507-a third screw hole; 6-a third bracket; 601-a fourth screw hole; 602-sixth through hole; 603-a fourth body; 604-sixth adjunct; 605-groove; 606-a fifth screw hole; 7-a linear bearing; 701-seventh consortium; 702-a fifth body; 703-seventh through holes; 704-eighth through holes; 8-a second screw; 801-eighth adjunct; 802-a sixth body; 803-a second through slot; 9-measuring rod; 901-a third contact section; 902-a second thread segment; 903-graduation segment; 10-a third screw; 1001-ninth consortium; 1002-a seventh body; 11-a first connecting rod; 12-a second connecting rod; 13-a bottom plate; 1301-ninth through holes; 14-rectangular steel pipes; 15-a screw; 16-nut.

Detailed Description

The following describes the utility model in detail by way of examples and figures, which are provided solely for the understanding of the utility model and are not intended to limit the utility model.

As shown in fig. 1 to 6, the device for measuring the inner diameter of the rectangular steel pipe based on the vertical direction provided by the utility model comprises a first bracket 1, two second brackets 5, four third brackets 6, eight first screws 2, thirty-two second screws 8, four third screws 10, sixteen positioning rods 3, sixteen measuring rods 9, two support plates 4, a bottom plate 13, eight linear bearings 7, two first connecting rods 11, two second connecting rods 12, four screw rods 15 and four nuts 16.

Referring to fig. 7 and 8, the first bracket 1 is formed by connecting a first main body 102 and a first auxiliary body 101, and the first auxiliary body 101 is located on the upper end surface of the first main body 102; the first main body 102 is of a rectangular symmetrical structure, four cylindrical first through holes 103 are symmetrically formed in the first main body 102, and the screw 15 is arranged in the first through holes 103 in a penetrating manner; the first auxiliary body 101 is of a regular octagon symmetrical structure, a rectangular steel pipe 14 is sleeved outside the first auxiliary body 101, a regular octagon second through hole 104 is formed in the axis position of the first auxiliary body 101, and the second through hole 104 penetrates through the first main body 102.

As shown in fig. 13 to 16, the second bracket 5 is formed by connecting two third main bodies 505, four third auxiliary bodies 503, one fourth auxiliary body 504 and eight fifth auxiliary bodies 506, the four third auxiliary bodies 503 are respectively located at the upper end face and the lower end face of the two third main bodies 505, the fourth auxiliary bodies 504 are located between the two third main bodies 505, and the eight fifth auxiliary bodies 506 are respectively located at the four end faces of the four third auxiliary bodies 503 which are oppositely arranged; the third main body 505, the third auxiliary body 503 and the fourth auxiliary body 504 are all in a cuboid symmetrical structure, a cylindrical fifth through hole 502 is formed in the center of the third main body 505, and the linear bearing 7 is arranged in the fifth through hole 502 in a penetrating manner; four second screw holes 501 are symmetrically formed around the fifth through hole 502, and the second screws 8 are screwed into the second screw holes 501; the fifth auxiliary body 506 is a cylindrical symmetrical structure, and fifty division scales are uniformly marked on the side surface of the fifth auxiliary body 506 along the circumferential direction; a third screw hole 507 is formed in the axis position of the fifth auxiliary body 506, the measuring rod 9 is screwed into the third screw hole 507, and the third screw hole 507 also penetrates through the third auxiliary body 503;

as shown in fig. 17 to 19, the third bracket 6 is formed by connecting a fourth main body 603 and a sixth auxiliary body 604, and the sixth auxiliary body 604 is located on the right end face of the fourth main body 603; the fourth main body 603 has a rectangular symmetrical structure, a fourth screw hole 601 is formed in one end surface of the fourth main body 603, and the third screw 10 is screwed into the fourth screw hole 601; a cylindrical sixth through hole 602 is formed at the axial position of the fourth screw hole 601, and the second connecting rod 12 is inserted into the sixth through hole 602; a fifth screw hole 606 is formed in the upper end face and the lower end face of the fourth main body 603, and the first screw 2 is screwed into the fifth screw hole 606; the sixth auxiliary body 604 is a cylindrical symmetrical structure, a cylindrical groove 605 is formed in the axis position of the sixth auxiliary body 604, and the first connecting rod 11 is inserted into the groove 605.

Referring to fig. 9, the first screw 2 is formed by coaxially connecting a second main body 202 and a second auxiliary body 201, wherein the second main body 202 and the second auxiliary body 201 are both in cylindrical symmetrical structures, and the second auxiliary body 201 is located at the lower end surface of the second main body 202; the end of the second auxiliary body 201 is provided with threads for screwing the fifth screw hole 606 of the third bracket 6; the upper end of the second main body 202 is provided with a first through groove 203 in a cuboid shape, so as to facilitate screwing the first screw 2.

Referring to fig. 22, the second screw 8 is formed by coaxially connecting a sixth main body 802 and an eighth auxiliary body 801, where the sixth main body 802 and the eighth auxiliary body 801 are both in a cylindrical symmetrical structure, and the eighth auxiliary body 801 is located on the right end face of the sixth main body 802; the end part of the eighth auxiliary body 801 is provided with threads for screwing the second screw hole 501 of the second bracket 5; a second rectangular through slot 803 is formed at the left end of the sixth main body 802, so as to facilitate screwing the second screw 8.

Referring to fig. 24, the third screw 10 is formed by coaxially connecting a seventh main body 1002 and a ninth auxiliary body 1001, wherein the seventh main body 1002 and the ninth auxiliary body 1001 are both in a cylindrical symmetrical structure, and the ninth auxiliary body 1001 is located at the right end face of the seventh main body 1002; the end of the ninth auxiliary body 1001 is provided with threads for screwing the fourth screw hole 601 of the third bracket 6.

Referring to fig. 10, the positioning rod 3 is formed by connecting a first contact section 301, a first thread section 302 and a second contact section 303 which are coaxial; the first thread section 302 is a cylindrical symmetrical structure with threads on the side surface, and is used for screwing the first screw hole 401 of the support plate 4; the first contact section 301 and the second contact section 303 are both in a cylindrical symmetrical structure, and are used for contacting the inner surface of the rectangular steel pipe 14.

Referring to fig. 23, the measuring rod 9 is formed by connecting a third contact section 901, a second thread section 902 and a scale section 903 which are coaxial; the third contact section 901 has a hemispherical symmetrical structure and is used for contacting the inner surface of the rectangular steel pipe 14; the second thread section 902 is a cylindrical symmetrical structure with threads on the side surface, and is used for screwing the third screw hole 507 of the second bracket 5, and the pitch value of the threads on the side surface of the second thread section 902 is 0.5mm; the scale section 903 is a cylindrical symmetrical structure, four groups of scales are uniformly marked on the side surface of the scale section 903 along the circumferential direction, each group of scales is composed of two adjacent left-right staggered scales, the dislocation value of the two staggered scales is 0.5mm, and the minimum division value of the staggered scales is 1mm.

Referring to fig. 11 and 12, the support plate 4 has a rectangular symmetrical structure, four cylindrical third through holes 402 are symmetrically formed in the support plate 4, and the first screws 2 are inserted into the third through holes 402; a fourth through hole 403 in a cuboid shape is formed in the center of the support plate 4, and the second bracket 5 is arranged in the fourth through hole 403 in a penetrating manner; two first screw holes 401 are respectively formed in the four end faces of the support plate 4, and the positioning rod 3 is screwed into the first screw holes 401; the end surfaces of the support plates 4 are respectively marked with a group of scales so as to be capable of calibrating the position of the second support 5.

Referring to fig. 25, the bottom plate 13 is of a rectangular symmetrical structure, four cylindrical ninth through holes 1301 are symmetrically formed in the bottom plate 13, the screw 15 is inserted into the ninth through holes 1301, and the nut 16 is screwed on the threaded end of the screw 15.

As shown in fig. 20 and 21, the linear bearing 7 is formed by connecting a fifth main body 702 and a seventh auxiliary body 701, and the seventh auxiliary body 701 is located on the right end face of the fifth main body 702; the seventh auxiliary body 701 has a cylindrical symmetrical structure; a cylindrical seventh through hole 703 is formed at the axial position of the seventh auxiliary body 701, the first connecting rod 11 or the second connecting rod 12 is inserted into the seventh through hole 703, and the seventh through hole 703 also penetrates through the fifth main body 702; a retainer, balls and check rings are further arranged in the seventh auxiliary body 701, a plurality of balls are uniformly arranged in the retainer, and the check rings are arranged at two ends of the retainer; the fifth main body 702 is a symmetrical structure in a cuboid shape, four eighth cylindrical through holes 704 are symmetrically formed in the fifth main body 702, and the second screws 8 are inserted into the eighth through holes 704.

Referring to fig. 3 and 6, the first connecting rod 11 has a cylindrical symmetrical structure, the middle portion of the first connecting rod 11 is inserted into the seventh through hole 703 of the linear bearing 7, and two ends of the first connecting rod 11 are respectively inserted into the grooves 605 of the third bracket 6.

As shown in fig. 4 and fig. 6, the second connecting rod 12 has a cylindrical symmetrical structure, the middle portion of the second connecting rod 12 is inserted into the seventh through hole 703 of the linear bearing 7, and two ends of the second connecting rod 12 are respectively inserted into the sixth through hole 602 of the third bracket 6.

The assembly process of the device for measuring the inner diameter of the rectangular steel pipe based on the vertical direction comprises the following steps:

as shown in fig. 1 to 25, first, the eight seventh auxiliary bodies 701 of the eight linear bearings 7 are inserted into the four fifth through holes 502 of the two second brackets 5, thirty-two eighth through holes 704 of the eight linear bearings 7 and sixteen second screw holes 501 of the two second brackets 5 are centered, and then thirty-two second screws 8 are inserted into the thirty-two eighth through holes 704 and screwed into sixteen second screw holes 501, so that the eight linear bearings 7 and the two second brackets 5 can be assembled;

then, arranging one second bracket 5 on the mounting platform, then respectively penetrating two first connecting rods 11 into four seventh through holes 703 of four linear bearings 7, then arranging four third brackets 6 on the mounting platform, and then respectively penetrating two ends of the two first connecting rods 11 into four grooves 605 of the four third brackets 6, so that the four linear bearings 7, the two first connecting rods 11 and the four third brackets 6 can be assembled;

then, arranging one support plate 4 on the four third brackets 6, centering the four third through holes 402 of the support plate 4 and the four fifth screw holes 606 on the four third brackets 6, and then threading the four first screws 2 through the four third through holes 402 and into the four fifth screw holes 606, so that one support plate 4 and the four third brackets 6 can be assembled;

then the other second bracket 5 is horizontally rotated by 90 degrees and is arranged on the mounting platform, the assembled support plate 4 and the four third brackets 6 are turned up and down and are arranged on the second bracket 5, then the four sixth through holes 602 of the four third brackets 6 and the four seventh through holes 703 of the other four linear bearings 7 are centered, then one second connecting rod 12 is respectively penetrated in the two groups of centered through holes, then one third screw 10 is respectively screwed in the four fourth screw holes 601 of the four third brackets 6, and thus the other four linear bearings 7, the two second connecting rods 12 and the four third brackets 6 can be assembled;

then, arranging the other support plate 4 above the four third brackets 6, centering the four third through holes 402 of the support plate 4 and the four fifth screw holes 606 on the upper positions of the four third brackets 6, and then threading the other four first screws 2 through the four third through holes 402 and into the four fifth screw holes 606, so that the other support plate 4 and the four third brackets 6 can be assembled;

then the bottom plate 13 is arranged on the mounting platform, then the first bracket 1 is arranged on the bottom plate 13, the four first through holes 103 of the first bracket 1 and the four ninth through holes 1301 of the bottom plate 13 are centered, then the screw rods 15 are respectively penetrated in the four sets of centered through holes, and then the nuts 16 are respectively screwed on the threaded ends of the four screw rods 15, so that the first bracket 1 and the bottom plate 13 can be assembled;

then sixteen measuring rods 9 are screwed into sixteen third screw holes 507 of the two second brackets 5 respectively, and finally sixteen positioning rods 3 are screwed into sixteen first screw holes 401 of the two support plates 4 respectively, so that the whole device is assembled and can be put into use.

The utility model provides a working principle of a device for measuring the inner diameter of a rectangular steel pipe based on the vertical direction:

as shown in fig. 26, for convenience of description, the two measuring rods 9 disposed front and back are respectively designated as a and b, the two measuring rods 9 disposed left and right are respectively designated as c and d, the distal distance between the two third auxiliary bodies 503 disposed front and back of the second bracket 5 is designated as v, the distal distance between the two third auxiliary bodies 503 disposed left and right of the second bracket 5 is designated as w, and the radius of the third contact section 901 of the measuring rod 9 is designated as r, then sixteen third contact sections 901 of sixteen measuring rods 9 disposed at zero scale positions just extend out of eight third auxiliary bodies 503 of two second brackets 5, that is, the lengths of extension of a, b, c and d are all r;

as shown in fig. 26, sixteen measuring rods 9 are in tangential relation with the rectangular steel pipe 14 when the inner diameter of the rectangular steel pipe 14 is measured; the lengths of the a, b, c, and d precesses are defined as Δa, Δb, Δc, and Δd, respectively, and the inner diameters of the rectangular steel pipes 14 measured by the a and b are defined as

Setting the inner diameter of the rectangular steel pipe 14 measured by the c and d to +.>

From this knowledge of the distances between parallel planes being equal everywhere, the following two equations can be derived: />

After finishing, the following two equations are obtained: />

As shown in fig. 2 and 26, the combined use of sixteen scale segments 903 of sixteen measuring rods 9 and sixteen fifth auxiliary bodies 506 of two second brackets 5 can form sixteen spiral micrometers, the measurement precision of sixteen spiral micrometers can reach 0.01mm, and the reasoning process is as follows: since the pitch value of the thread of the measuring rod 9 is 0.5mm, that is, the axial distance moved by the measuring rod 9 per rotation is 0.5mm, and since fifty division scales are uniformly marked on the side surface of the fifth auxiliary body 506 along the circumferential direction, the axial distance moved by the measuring rod 9 within the third screw hole 507 is 0.01mm per rotation of the measuring rod 9.

The device for measuring the inner diameter of the rectangular steel pipe based on the vertical direction comprises the following use process:

step 1: as shown in fig. 1 and 2, the rectangular steel tube 14 is firstly erected and sleeved outside the first auxiliary body 101 of the first bracket 1, then sixteen measuring rods 9 are all screwed to the zero-scale position, then two support plates 4 after assembly are arranged in the positions of the rectangular steel tube 14 to be measured in a penetrating manner, then sixteen positioning rods 3 are screwed respectively, sixteen first contact sections 301 of the sixteen positioning rods 3 are respectively contacted with the inner surface of the rectangular steel tube 14, so that the rectangular steel tube 14 is accurately positioned;

step 2: as shown in fig. 3, the second bracket 5 capable of moving left and right is fixed at a middle position along the two first connecting rods 11, then the second bracket 5 is moved back and forth along the two second connecting rods 12 to reach the position to be measured of the rectangular steel tube 14, then eight measuring rods 9 positioned at the left side and the right side are screwed in respectively, and eight third contact sections 901 of the eight measuring rods 9 are contacted with the inner surface of the rectangular steel tube 14 respectively, and at the moment, the eight measuring rods 9 are in tangential relation with the rectangular steel tube 14;

step 3: as shown in fig. 4, the second support 5 capable of moving back and forth is fixed at a middle position along the two second connecting rods 12, then the second support 5 is moved left and right along the two first connecting rods 11 to reach the position to be measured of the rectangular steel tube 14, then eight measuring rods 9 positioned on the front side and the rear side are screwed in respectively, and eight third contact sections 901 of the eight measuring rods 9 are contacted with the inner surface of the rectangular steel tube 14 respectively, and at this time, the eight measuring rods 9 are in tangential relation with the rectangular steel tube 14;

step 4: as shown in fig. 26, the precession distances Δa, Δb, Δc, and Δd of the a, b, c, and d are then read, and then the distal distance v between the two third subsidiary bodies 503 disposed one after the other and the distal distance w between the two third subsidiary bodies 503 disposed one after the other are measured while the radius r of the third contact section 901 is measured, by the formula

The rectangular steel pipe 14 can be calculatedCorresponding inner diameters +.A at said a and said b, said c and said d>

And->

Supplementary explanation: the device for measuring the inner diameter of the rectangular steel pipe based on the vertical direction is designed by adopting a symmetrical structure, sixteen scale sections 903 of sixteen measuring rods 9 and sixteen initial scales of sixteen fifth auxiliary bodies 506 of two second brackets 5 are in an aligned relationship, so that the measurement effectiveness is ensured; since the first contact section 301 and the second contact section 303 of the positioning rod 3 are both cylindrical structures, sixteen positioning rods 3 and the rectangular steel pipes 14 can be ensured to keep stable surface contact.

According to the embodiment, the device for measuring the inner diameter of the rectangular steel pipe based on the vertical direction can be used for rapidly positioning the inner surface of the rectangular steel pipe, so that effective measurement is realized, the inner diameter of the rectangular steel pipe can be calculated, and the device has the characteristics of low manufacturing cost, simplicity in operation and high measurement precision.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or that equivalents may be substituted for part of the technical features thereof.

Claims (1)

1. The device for measuring the inner diameter of the rectangular steel pipe based on the vertical direction is characterized by comprising: the device comprises a first bracket (1), two second brackets (5), four third brackets (6), eight first screws (2), thirty-two second screws (8), four third screws (10), sixteen positioning rods (3), sixteen measuring rods (9), two support plates (4), a bottom plate (13), eight linear bearings (7), two first connecting rods (11), two second connecting rods (12), four screws (15) and four nuts (16); wherein:

the first bracket (1) is formed by connecting a first main body (102) and a first auxiliary body (101), and the first auxiliary body (101) is positioned on the upper end surface of the first main body (102); the first main body (102) is of a cuboid symmetrical structure, four cylindrical first through holes (103) are symmetrically formed in the first main body (102), and the screw (15) is arranged in the first through holes (103) in a penetrating mode; the first auxiliary body (101) is of a regular octagon symmetrical structure, a rectangular steel pipe is sleeved outside the first auxiliary body (101), a regular octagon second through hole (104) is formed in the axis position of the first auxiliary body (101), and the second through hole (104) penetrates through the first main body (102) at the same time;

the second bracket (5) is formed by connecting two third main bodies (505), four third auxiliary bodies (503), one fourth auxiliary body (504) and eight fifth auxiliary bodies (506), the four third auxiliary bodies (503) are respectively positioned on the upper end face and the lower end face of the two third main bodies (505), the fourth auxiliary bodies (504) are positioned between the two third main bodies (505), and the eight fifth auxiliary bodies (506) are respectively positioned on the four end faces of the four third auxiliary bodies (503) which are oppositely arranged; the third main body (505), the third auxiliary body (503) and the fourth auxiliary body (504) are all of cuboid symmetrical structures, a cylindrical fifth through hole (502) is formed in the center of the third main body (505), and the linear bearing (7) is arranged in the fifth through hole (502) in a penetrating mode; four second screw holes (501) are symmetrically formed in the periphery of the fifth through hole (502), and the second screws (8) are screwed into the second screw holes (501); the fifth auxiliary body (506) is of a cylindrical symmetrical structure, and fifty division scales are uniformly marked on the side surface of the fifth auxiliary body (506) along the circumferential direction; a third screw hole (507) is formed in the axis position of the fifth auxiliary body (506), the measuring rod (9) is screwed in the third screw hole (507), and the third screw hole (507) penetrates through the third auxiliary body (503) at the same time;

the third bracket (6) is formed by connecting a fourth main body (603) and a sixth auxiliary body (604), and the sixth auxiliary body (604) is positioned on the right end face of the fourth main body (603); the fourth main body (603) is of a cuboid symmetrical structure, a fourth screw hole (601) is formed in one end face of the fourth main body (603), and the third screw (10) is screwed into the fourth screw hole (601); a cylindrical sixth through hole (602) is formed in the axis position of the fourth screw hole (601), and the second connecting rod (12) is arranged in the sixth through hole (602) in a penetrating manner; a fifth screw hole (606) is formed in the upper end face and the lower end face of the fourth main body (603), and the first screw (2) is screwed in the fifth screw hole (606); the sixth auxiliary body (604) is of a cylindrical symmetrical structure, a cylindrical groove (605) is formed in the axis position of the sixth auxiliary body (604), and the first connecting rod (11) is arranged in the groove (605) in a penetrating mode;

the first screw (2) is formed by connecting a second main body (202) and a second auxiliary body (201) which are coaxial, the second main body (202) and the second auxiliary body (201) are of cylindrical symmetrical structures, and the second auxiliary body (201) is positioned on the lower end face of the second main body (202); the end part of the second auxiliary body (201) is provided with threads for screwing a fifth screw hole (606) of the third bracket (6); the upper end of the second main body (202) is provided with a first cuboid through groove (203) so as to facilitate screwing the first screw (2);

the second screw (8) is formed by connecting a sixth main body (802) and an eighth auxiliary body (801) which are coaxial, the sixth main body (802) and the eighth auxiliary body (801) are both in cylindrical symmetrical structures, and the eighth auxiliary body (801) is positioned on the right end face of the sixth main body (802); the end part of the eighth auxiliary body (801) is provided with threads for screwing the second screw hole (501) of the second bracket (5); a cuboid second through groove (803) is formed in the left end of the sixth main body (802) so as to facilitate screwing of the second screw (8);

the third screw (10) is formed by connecting a seventh main body (1002) and a ninth auxiliary body (1001) which are coaxial, the seventh main body (1002) and the ninth auxiliary body (1001) are both in cylindrical symmetrical structures, and the ninth auxiliary body (1001) is positioned on the right end face of the seventh main body (1002); the end part of the ninth auxiliary body (1001) is provided with threads for screwing a fourth screw hole (601) of the third bracket (6);

the positioning rod (3) is formed by connecting a first contact section (301), a first thread section (302) and a second contact section (303) which are coaxial; the first thread section (302) is of a cylindrical symmetrical structure with threads on the side surface and is used for screwing the first screw hole (401) of the support plate (4); the first contact section (301) and the second contact section (303) are of cylindrical symmetrical structures and are used for contacting the inner surface of the rectangular steel pipe;

the measuring rod (9) is formed by connecting a third coaxial contact section (901), a second threaded section (902) and a scale section (903); the third contact section (901) is of a hemispherical symmetrical structure and is used for contacting the inner surface of the rectangular steel pipe; the second thread section (902) is of a cylindrical symmetrical structure with threads arranged on the side surface, and is used for screwing the third screw hole (507) of the second bracket (5), and the pitch value of the threads arranged on the side surface of the second thread section (902) is 0.5mm; the scale sections (903) are of cylindrical symmetrical structures, four groups of scales are uniformly marked on the side surfaces of the scale sections (903) along the circumferential direction, each group of scales consists of two adjacent left and right staggered scales, the staggered value of the two staggered scales is 0.5mm, and the minimum division value of the staggered scales is 1mm;

the support plate (4) is of a cuboid symmetrical structure, four cylindrical third through holes (402) are symmetrically formed in the support plate (4), and the first screws (2) penetrate through the third through holes (402); a cuboid fourth through hole (403) is formed in the center of the support plate (4), and the second support (5) is arranged in the fourth through hole (403) in a penetrating mode; two first screw holes (401) are respectively formed in the four end faces of the support plate (4), and the positioning rod (3) is screwed in the first screw holes (401); the end surfaces of the support plates (4) are respectively marked with a group of scales so as to be capable of calibrating the position of the second support (5);

the bottom plate (13) is of a cuboid symmetrical structure, four cylindrical ninth through holes (1301) are symmetrically formed in the bottom plate (13), the screw (15) is arranged in the ninth through holes (1301) in a penetrating mode, and the nut (16) is screwed at the threaded end of the screw (15);

the linear bearing (7) is formed by connecting a fifth main body (702) and a seventh auxiliary body (701), and the seventh auxiliary body (701) is positioned on the right end surface of the fifth main body (702); the seventh auxiliary body (701) is of a cylindrical symmetrical structure; a cylindrical seventh through hole (703) is formed in the axis position of the seventh auxiliary body (701), the first connecting rod (11) or the second connecting rod (12) is inserted into the seventh through hole (703), and the seventh through hole (703) also penetrates through the fifth main body (702); a retainer, balls and check rings are further arranged in the seventh auxiliary body (701), a plurality of balls are uniformly arranged in the retainer, and the check rings are arranged at two ends of the retainer; the fifth main body (702) is of a cuboid symmetrical structure, four cylindrical eighth through holes (704) are symmetrically formed in the fifth main body (702), and the second screws (8) are arranged in the eighth through holes (704) in a penetrating mode;

the first connecting rod (11) is of a cylindrical symmetrical structure, the middle part of the first connecting rod (11) is penetrated into a seventh through hole (703) of the linear bearing (7), and two ends of the first connecting rod (11) are respectively penetrated into grooves (605) of the third bracket (6);

the second connecting rod (12) is of a cylindrical symmetrical structure, the middle part of the second connecting rod (12) is penetrated into a seventh through hole (703) of the linear bearing (7), and two ends of the second connecting rod (12) are respectively penetrated into a sixth through hole (602) of the third bracket (6);

the screw (15) and the nut (16) are standard components.

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