CN216791072U - Device based on roll formula measurement steel pipe internal diameter - Google Patents
Device based on roll formula measurement steel pipe internal diameter Download PDFInfo
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- CN216791072U CN216791072U CN202123369789.2U CN202123369789U CN216791072U CN 216791072 U CN216791072 U CN 216791072U CN 202123369789 U CN202123369789 U CN 202123369789U CN 216791072 U CN216791072 U CN 216791072U
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Abstract
The utility model discloses a device for measuring the inner diameter of a steel pipe based on a rolling type, and belongs to the technical field of steel pipe measurement. The device based on roll formula measurement steel pipe internal diameter that provides includes two measuring sticks, eight connecting rods, two first supports, two second supports, two third supports, two movable support, eight first hinges, sixteen second hinges, sixteen wheels, eight screw rods and eight nuts, can carry out the centering to the inner wall of steel pipe fast, and then realize effectual measurement, thereby can calculate the internal diameter of steel pipe, and have low in manufacturing cost, easy operation and the high characteristics of measurement accuracy.
Description
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 steel pipe based on a rolling type.
Background
At present, most pipe-making enterprises usually adopt the processes of hot rolling perforation, continuous pipe rolling and tension reducing to produce seamless steel pipes, and are influenced by factors such as self gravity or rolling force, and the like, and the steel pipes are difficult to avoid the deformation problems such as similar bending or ellipse and the like along the axial direction, which directly influences the outline dimension precision of the steel pipes and further influences the processing performance of the steel pipes, so that many pipe-making enterprises have strict requirements on the inner diameter of the steel pipes, and the inner diameter of the steel pipes needs to be measured one by one; the conventional inner diameter measuring device cannot center the inner wall of the steel pipe, and only the largest chord in the steel pipe can be taken as the diameter by the lengthened measuring rod, so that the device is not perpendicular to the axis of the steel pipe during measurement, which is actually used for measuring the diameter of an ellipse in the steel pipe, and the largest chord can be found by measuring for many times, therefore, the measurement result of the devices is relatively unreliable.
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 length-variable measuring rod and a measuring meter, and the device has relatively poor measurement reliability because the device does not have a centering function.
Patent document CN103047912A discloses a digital display inside diameter measuring micrometer, which mainly comprises a fixed elbow measuring frame, a movable elbow measuring frame, an elbow positioning screw and a transmission device, wherein two digital display inside diameter micrometers are combined in parallel, and can simultaneously measure the maximum value and the minimum value of the inside diameter of a steel pipe.
Patent document CN201335669Y discloses an inner diameter measuring device, which mainly comprises a ruler frame, an anvil, a differential measuring head, a connecting bush, a fixed sleeve, an upper connecting rod and a lower connecting rod, and the measuring reliability of the device is relatively poor because the device does not have a centering function.
SUMMERY OF THE UTILITY MODEL
The utility model provides a device for measuring the inner diameter of a steel pipe based on a rolling type, which comprises: the device comprises two measuring rods, eight connecting rods, two first supports, two second supports, two third supports, two movable supports, eight first hinges, sixteen second hinges, sixteen wheels, eight screw rods and eight nuts;
the measuring rod is formed by connecting a scale section, a thread section and a contact section which are coaxial; the scale section is of a cylindrical symmetrical structure, four groups of scales are uniformly marked on the side face of the cylinder of the scale section, each group of scales consists of two adjacent rows of staggered scales on the left and right, the minimum division value of the two rows of staggered scales is 1mm, and the dislocation value is 0.5 mm; the thread section is a cylindrical symmetrical structure with threads on the side surface and is used for screwing the screw hole of the first support, 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 wall of the steel pipe;
the connecting rod is of a cuboid symmetrical structure; two ends of the connecting rod are respectively provided with a cylindrical second through hole, and the second hinge penetrates through the second through hole;
the first support is formed by connecting a first main body and two first auxiliary bodies, and the two first auxiliary bodies are respectively positioned on the upper end face and the lower end face of the first main body; the first auxiliary body is of a cylindrical symmetrical structure, fifty grid scales are uniformly marked on the side face of the first auxiliary body along the circumferential direction, and the fifty grid scales are used for dividing one unit pitch into fifty equal parts; the axis position of the first auxiliary body is provided with a screw hole, the measuring rod is screwed in the screw hole, and the screw hole also penetrates through the first main body; the first main body is of a cuboid symmetrical structure, and the upper end face and the lower end face of the first main body are respectively provided with two groups of four cuboid first grooves for guiding the wheels; the first main body is symmetrically provided with four cylindrical first through holes, the screw rod penetrates through the first through holes, and one end of the screw rod is screwed with the nut; a group of scales are respectively marked on the left end face and the right end face of the first main body and used for marking the positions of the two movable supports;
the second bracket 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 second rectangular through groove can be formed between the two third auxiliary bodies of each group, and the connecting rod penetrates through the second through groove; each third auxiliary body is provided with a cylindrical fifth through hole, and the second hinge penetrates through the fifth through hole;
the third support is formed by connecting two fourth main bodies and a fourth auxiliary body, the fourth main bodies and the fourth auxiliary body are both rectangular symmetrical structures, and the fourth auxiliary body is positioned between the two fourth main bodies; each fourth main body is provided with two cylindrical sixth through holes, and the screw rod penetrates through the sixth through holes;
the movable support is formed by connecting a second main body and eight second auxiliary bodies, the second main body and the second auxiliary bodies are of rectangular symmetrical structures, and the eight second auxiliary bodies are divided into four groups and are respectively positioned on the left end face and the right end face of the second main body; a first rectangular through groove can be formed between the two second auxiliary bodies of each group, and the connecting rod penetrates through the first through groove; each second auxiliary body is provided with a cylindrical fourth through hole, and the second hinge penetrates through the fourth through hole; the upper end surface and the lower end surface of the second main body are respectively provided with four second grooves in a cuboid shape, and the wheels penetrate through the second grooves; the left side and the right side of each second groove are respectively provided with a cylindrical third through hole, and the first hinge penetrates through the third through hole;
the wheel, the first hinge, the second hinge, the screw and the nut are all standard parts.
The device for measuring the inner diameter of the steel pipe based on the rolling type is composed of two measuring rods, eight connecting rods, two first supports, two second supports, two third supports, two movable supports, eight first hinges, sixteen second hinges, sixteen wheels, eight screw rods and eight nuts.
When the device is used, the two measuring rods are firstly screwed to the zero scale position, then the device is arranged in the steel pipe in a penetrating way, the two movable support vehicles are drawn close along the first groove, so that the two second supports are contacted with the inner wall of the steel pipe, the two measuring rods are respectively screwed in, the two contact sections of the two measuring rods are contacted with the inner wall of the steel pipe, the screwed-in distances delta 1 and delta 2 of the two measuring rods are respectively read, and the far-end distance d between the two measuring rods at the zero scale position is measured0Therefore, the operation process of the device of the utility model is relatively simple.
The device is designed by adopting a symmetrical structure, and the movable bracket, the wheels and the first bracket are used together, so that the movable bracket can move according to a preset track; the combined use of the first support, the movable support, the connecting rod and the second support can realize that the second support positions the inner wall of the steel pipe; the two scale sections of the two measuring rods and the two first auxiliary bodies of the two first supports are jointly used to form two spiral micrometer gauges, so that the purpose of accurately measuring and calculating the inner diameter of the steel pipe is achieved, and therefore the measuring precision of the device is relatively high.
The device for measuring the inner diameter of the steel pipe based on the rolling type can quickly center the inner wall of the steel pipe so as to realize effective measurement, thereby being capable of calculating the inner diameter of the steel pipe and having the characteristics of low manufacturing cost, simple operation and high measurement precision.
Drawings
FIG. 1 is a schematic structural diagram of a front view of a device for measuring the inner diameter of a steel pipe based on a rolling type, when a connecting rod is parallel to a first bracket, according to the utility model;
FIG. 2 is a left structural diagram of the device for measuring the inner diameter of the steel pipe based on the rolling type, when the connecting rod is parallel to the first bracket;
FIG. 3 is a schematic top view of the device for measuring the inner diameter of a steel pipe based on rolling type according to the present invention, wherein the connecting rod is parallel to the first support;
FIG. 4 is a schematic structural diagram of a front view of the device for measuring the inner diameter of the steel pipe based on the rolling type, when the connecting rod is perpendicular to the first bracket;
FIG. 5 is a left structural diagram of the device for measuring the inner diameter of a steel pipe based on a rolling type, when a connecting rod is vertical to a first bracket;
FIG. 6 is a schematic top view of the device for measuring the inner diameter of a steel pipe based on a rolling type, which is provided with a connecting rod and a first bracket vertically arranged;
FIG. 7 is a schematic view of the measuring rod of the present invention;
FIG. 8 is a left side view of the first bracket of the present invention;
FIG. 9 is a top view of the first bracket of the present invention;
FIG. 10 is a schematic top view of the connecting rod of the present invention;
FIG. 11 is a front view of the present invention with the mobile bracket and wheel assembled;
FIG. 12 is a left side elevational view of the present invention with the movable bracket and wheel assembled;
figure 13 is a schematic top view of the mobile bracket and wheel of the present invention assembled;
FIG. 14 is a front view of a second bracket of the present invention;
FIG. 15 is a left side view of a second bracket of the present invention;
FIG. 16 is a schematic top view of a second bracket of the present invention;
FIG. 17 is a front view of a third bracket of the present invention;
FIG. 18 is a schematic top view of a third bracket of the present invention;
FIG. 19 is a schematic structural diagram of the device for measuring the inner diameter of a steel pipe based on rolling of the present invention when positioning the steel pipe;
FIG. 20 is a schematic structural diagram of the device for measuring the inner diameter of a steel pipe based on rolling of the present invention;
fig. 21 is a schematic diagram of the working principle of the device for measuring the inner diameter of the steel pipe based on the rolling type.
Description of reference numerals: 1-a measuring rod; 101-scale section; 102-a threaded segment; 103-a contact section; 2-a first support; 201-a first appendage; 202-a first body; 203-a first via; 204 — a first groove; 205-screw holes; 3-a connecting rod; 301-a second via; 4-a movable support; 401-a second appendage; 402-a second body; 403-a first through slot; 404-a third via; 405-a second groove; 406-a fourth via; 5-a second bracket; 501-a second through groove; 502-a third body; 503-a third appendage; 504-fifth via; 6-a third stent; 601-a fourth body; 602-fourth appendage; 603-a sixth via; 7-a screw; 8-a nut; a 9-first hinge; b 9-second hinge; 10-wheels; 11-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 inner diameter of a steel pipe based on a rolling mode provided by the utility model comprises two measuring rods 1, eight connecting rods 3, two first brackets 2, two second brackets 5, two third brackets 6, two movable brackets 4, eight first hinges a9, sixteen second hinges b9, sixteen wheels 10, eight screws 7 and eight nuts 8, wherein all the components can be made of metal materials.
As shown in fig. 7 to 9, the measuring rod 1 is formed by connecting three coaxial portions, namely a scale section 101, a thread section 102 and a contact section 103; the scale section 101 is of a cylindrical symmetrical structure, four groups of scales are uniformly marked on the side face of the cylinder of the scale section 101, each group of scales is composed of two adjacent staggered scales in left and right rows, the minimum grid value of the two staggered scales is 1mm, and the dislocation value is 0.5 mm; the threaded section 102 is a cylindrical symmetrical structure with threads on the side surface and is used for screwing the screw hole 205 of the first bracket 2, and the thread pitch value of the threads of the threaded section 102 is 0.5 mm; the contact section 103 is a hemispheroid symmetrical structure and is used for contacting the inner wall of the steel pipe 11.
As shown in fig. 10, the connecting rod 3 has a rectangular symmetrical structure; two ends of the connecting rod 3 are respectively provided with a cylindrical second through hole 301, and the second hinge b9 penetrates through the second through hole 301.
As shown in fig. 8 and 9, the first bracket 2 is formed by connecting a first main body 202 and two first auxiliary bodies 201, and the two first auxiliary bodies 201 are respectively located on the upper and lower end surfaces of the first main body 202; the first auxiliary body 201 is a cylindrical symmetrical structure, and fifty dividing scales are uniformly marked on the side surface of the first auxiliary body 201 along the circumferential direction and used for dividing one unit pitch into fifty equal parts; a screw hole 205 is formed in the axial position of the first auxiliary body 201, the measuring rod 1 is screwed in the screw hole 205, and the screw hole 205 also penetrates through the first main body 202; the first main body 202 is a cuboid-shaped symmetrical structure, and two groups, four in total, of cuboid-shaped first grooves 204 are respectively formed in the upper end face and the lower end face of the first main body 202 and used for guiding the wheels 10; the first main body 202 is symmetrically provided with four cylindrical first through holes 203, the screw 7 penetrates through the first through holes 203, and one end of the screw 7 is screwed with the nut 8; the left end face and the right end face of the first main body 202 are respectively provided with a group of scales for calibrating the positions of the two movable supports 4.
As shown in fig. 14 to 16, the second 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 second through slot 501 in a rectangular parallelepiped shape can be formed between the two third auxiliary bodies 503 of each group, and the connecting rod 3 is inserted into the second through slot 501; each of the third auxiliary bodies 503 is provided with a cylindrical fifth through hole 504, and the second hinge b9 penetrates through the fifth through hole 504.
As shown in fig. 17 and 18, the third bracket 6 is formed by connecting two fourth main bodies 601 and a fourth auxiliary body 602, the fourth main bodies 601 and the fourth auxiliary body 602 are both rectangular parallelepiped symmetrical structures, and the fourth auxiliary body 602 is located between the two fourth main bodies 601; each fourth body 601 is provided with two cylindrical sixth through holes 603, and the screw 7 penetrates through the sixth through holes 603.
As shown in fig. 11 to 13, the movable support 4 is formed by connecting a second main body 402 and eight second auxiliary bodies 401, the second main body 402 and the second auxiliary bodies 401 are both of a rectangular parallelepiped symmetric structure, and the eight second auxiliary bodies 401 are divided into four groups and are respectively located on the left end face and the right end face of the second main body 402; a first through groove 403 in a rectangular parallelepiped shape can be formed between the two second auxiliary bodies 401 of each group, and the connecting rod 3 is inserted into the first through groove 403; each second auxiliary body 401 is provided with a cylindrical fourth through hole 406, and the second hinge b9 penetrates through the fourth through hole 406; the upper and lower end surfaces of the second body 402 are respectively provided with four second grooves 405 in a rectangular shape, and the wheels 10 are inserted into the second grooves 405; the left side and the right side of each second groove 405 are both provided with a cylindrical third through hole 404, and the first hinge a9 penetrates through the third through hole 404.
The utility model provides an assembly process of a device for measuring the inner diameter of a steel pipe based on a rolling type, which comprises the following steps:
as shown in fig. 1 to 18, first, a wheel 10 is inserted into each of sixteen second grooves 405 of two movable brackets 4, so as to ensure that sixteen axle holes of the wheel 10 are aligned with eight third through holes 404 of the two movable brackets 4, and then a first hinge a9 is installed into each of eight aligned through holes, so that two movable brackets 4 and sixteen wheels 10 can be assembled into two movable bracket vehicles;
then, one first bracket 2 is arranged on the mounting table, then two third brackets 6 are arranged on the first main body 202 of the first bracket 2, four sixth through holes 603 with two third brackets 6 positioned at the bottom are aligned with four first through holes 203 of the first bracket 2, then one screw rod 7 is respectively arranged in each of the four aligned through holes, and then one nut 8 is screwed on the other end of each of the four screw rods 7, so that one first bracket 2 and two third brackets 6 can be assembled;
then two movable support carts are arranged on the first support 2, eight wheels 10 at the lower positions are ensured to be positioned in four first grooves 204 of the first support 2, then the other first support 2 is arranged on two third supports 6, four first through holes 203 of the first support 2 and four sixth through holes 603 at the positions of the two third supports 6 are ensured to be aligned, then one screw 7 is respectively arranged in the through holes in the four pairs, and then one nut 8 is respectively screwed at the other ends of the four screws 7, so that the other first support 2 and the two third supports 6 can be assembled;
then, one end of each of the eight connecting rods 3 is respectively inserted into the eight first through grooves 403 of the two movable brackets 4, then the eight second through holes 301 of the eight connecting rods 3 are aligned with the sixteen fourth through holes 406 of the two movable brackets 4, and then one second hinge b9 is respectively installed in each of the eight aligned through holes, so that one end of each of the eight connecting rods 3 and the two movable brackets 4 can be assembled;
then, the other ends of the eight connecting rods 3 are respectively inserted into the eight second through grooves 501 of the two second brackets 5, then the other eight second through holes 301 of the eight connecting rods 3 are aligned with the sixteen fifth through holes 504 of the two second brackets 5, then one second hinge b9 is respectively installed in the eight aligned through holes, and then the two measuring rods 1 are respectively screwed into the two screw holes 205 of the two first brackets 2, 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 steel pipe based on a rolling type, which comprises the following steps:
as shown in fig. 1 to 6, when eight of the links 3 and two of the first brackets 2 are maintained in a parallel relationship, the apparatus is in a contracted state; when the eight connecting rods 3 and the two first brackets 2 are kept in a vertical relation, the device is in an extending state; because the device is designed by adopting a symmetrical structure, the two second supports 5 can form a rectangular frame, and when four horizontal edges of the rectangular frame simultaneously contact the inner wall of the steel pipe 11, the radial direction of the two measuring rods 1 along the steel pipe 11 can be ensured;
as shown in fig. 21, during measurement, both the two contact sections 103 of the two measuring rods 1 and the inner wall of the steel pipe 11 are in contact with each other, that is, both the two contact sections 103 of the two measuring rods 1 and the inner wall of the steel pipe 11 are in circular inscribed state, at this time, the distance of the upward screwing of the measuring rod 1 positioned at the upper position is Δ 1, the distance of the downward screwing of the measuring rod 1 positioned at the lower position is Δ 2, and the distance of the distal end between the two measuring rods 1 at the zero scale position is d0The inner diameter d of the steel pipe 11x＝d0+△1+△2；
As shown in fig. 21, the combined use of the scale section 101 of the measuring rod 1 and the first auxiliary body 201 of the first support 2 can form a micrometer screw with a measuring accuracy of 0.01mm, and the reasoning process is as follows: since the thread pitch of the thread section 102 is 0.5mm and fifty division scales are uniformly marked on the side surface of the first auxiliary body 201 along the circumferential direction, the axial distance of the movement of the measuring rod 1 in the screw hole 205 is 0.01mm when the measuring rod 1 rotates one division scale.
The utility model provides a device for measuring the inner diameter of a steel pipe based on a rolling type, which comprises the following steps:
step 1: firstly, rotating the two measuring rods 1 to a zero scale position, vertically penetrating the device into the port of the steel pipe 11, then simultaneously and oppositely pushing the two movable support vehicles at a constant speed along the eight first grooves 204 of the two first supports 2, and in the process that the two movable support vehicles approach each other, when the two third main bodies 502 simultaneously contact the inner wall of the steel pipe 11, the two second supports 5 inevitably center the steel pipe 11, as shown in fig. 19;
and 2, step: then, screwing in the two measuring rods 1 respectively, stopping screwing in the two measuring rods 1 when the two contact sections 103 of the two measuring rods 1 are both in contact with the inner wall of the steel pipe 11, enabling the two contact sections 103 to be in a circle inscribing state with the inner wall of the steel pipe 11, reading a distance delta 1 that the measuring rod 1 at the upper position is screwed upwards and a distance delta 2 that the measuring rod 1 at the lower position is screwed downwards respectively, and substituting the distance delta 1 and the distance delta 2 into the formula to calculate, as shown in fig. 20;
supplementary explanation: the device for measuring the inner diameter of the steel pipe based on the rolling type is designed by adopting a symmetrical structure, and scales of two movable bracket vehicles corresponding to two first main bodies 202 of two first brackets 2 are observed so as to ensure that the two movable bracket vehicles have the same retraction amount or the same extension amount; accurately measuring the distance d between the two measuring rods 1 at the zero scale position in advance0(ii) a The initial scales of the two measuring rods 1 and the two first auxiliary bodies 201 of the two first brackets 2 are kept in alignment, so that the effectiveness of measurement is ensured.
The embodiment shows that the inner wall of the steel pipe can be centered quickly by adopting the device for measuring the inner diameter of the steel pipe based on the rolling type, so that effective measurement can be realized, and the inner diameter of the steel pipe can be calculated.
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 roll formula measurement steel pipe internal diameter which characterized in that, the device based on roll formula measurement steel pipe internal diameter includes: the device comprises two measuring rods (1), eight connecting rods (3), two first supports (2), two second supports (5), two third supports (6), two movable supports (4), eight first hinges (a9), sixteen second hinges (b9), sixteen wheels (10), eight screw rods (7) and eight nuts (8);
the measuring rod (1) is formed by connecting a scale section (101), a thread section (102) and a contact section (103) which are coaxial; the scale section (101) is of a cylindrical symmetrical structure, four groups of scales are uniformly marked on the side face of the cylinder of the scale section (101), each group of scales is composed of two adjacent rows of staggered scales on the left and right, the minimum lattice value of the two rows of staggered scales is 1mm, and the dislocation value is 0.5 mm; the threaded section (102) is of a cylindrical symmetrical structure with threads on the side surface and is used for screwing the threaded hole (205) of the first bracket (2), and the thread pitch value of the threads of the threaded section (102) is 0.5 mm; the contact section (103) is of a hemispheroid symmetrical structure and is used for contacting the inner wall of the steel pipe;
the connecting rod (3) is of a cuboid symmetrical structure; two ends of the connecting rod (3) are respectively provided with a cylindrical second through hole (301), and the second hinge (b9) penetrates through the second through hole (301);
the first bracket (2) is formed by connecting a first main body (202) and two first auxiliary bodies (201), wherein the two first auxiliary bodies (201) are respectively positioned on the upper end surface and the lower end surface of the first main body (202); the first auxiliary body (201) is of a cylindrical symmetrical structure, and fifty dividing scales are uniformly marked on the side surface of the first auxiliary body (201) along the circumferential direction and used for dividing one unit pitch into fifty equal parts; a screw hole (205) is formed in the axis position of the first auxiliary body (201), the measuring rod (1) is screwed in the screw hole (205), and the screw hole (205) also penetrates through the first main body (202); the first main body (202) is of a cuboid-shaped symmetrical structure, and two groups of four cuboid-shaped first grooves (204) are respectively formed in the upper end face and the lower end face of the first main body (202) and used for guiding the wheels (10); the first main body (202) is symmetrically provided with four cylindrical first through holes (203), the screw (7) penetrates through the first through holes (203), and one end of the screw (7) is screwed with the nut (8); a group of scales are respectively marked on the left end face and the right end face of the first main body (202) and used for marking the positions of the two movable supports (4);
the second 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 second rectangular through groove (501) can be formed between the two third auxiliary bodies (503) of each group, and the connecting rod (3) penetrates through the second through groove (501); each third auxiliary body (503) is provided with a cylindrical fifth through hole (504), and the second hinge (b9) penetrates through the fifth through hole (504);
the third bracket (6) is formed by connecting two fourth main bodies (601) and a fourth auxiliary body (602), the fourth main bodies (601) and the fourth auxiliary body (602) are both rectangular symmetrical structures, and the fourth auxiliary body (602) is positioned between the two fourth main bodies (601); each fourth main body (601) is provided with two cylindrical sixth through holes (603), and the screw (7) penetrates through the sixth through holes (603);
the movable support (4) is formed by connecting a second main body (402) and eight second auxiliary bodies (401), the second main body (402) and the second auxiliary bodies (401) are of rectangular symmetrical structures, and the eight second auxiliary bodies (401) are divided into four groups and are respectively positioned on the left end face and the right end face of the second main body (402); a first through groove (403) in a rectangular parallelepiped shape can be formed between the two second auxiliary bodies (401) of each group, and the connecting rod (3) is arranged in the first through groove (403) in a penetrating manner; each second auxiliary body (401) is provided with a cylindrical fourth through hole (406), and the second hinge (b9) penetrates through the fourth through hole (406); the upper end face and the lower end face of the second main body (402) are respectively provided with four second rectangular grooves (405), and the wheels (10) penetrate through the second grooves (405); the left side and the right side of each second groove (405) are respectively provided with a cylindrical third through hole (404), and the first hinge (a9) penetrates through the third through hole (404);
the wheel (10), the first hinge (a9), the second hinge (b9), the screw (7) and the nut (8) are all standard pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123369789.2U CN216791072U (en) | 2021-12-29 | 2021-12-29 | Device based on roll formula measurement steel pipe internal diameter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123369789.2U CN216791072U (en) | 2021-12-29 | 2021-12-29 | Device based on roll formula measurement steel pipe internal diameter |
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| CN216791072U true CN216791072U (en) | 2022-06-21 |
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| CN202123369789.2U Active CN216791072U (en) | 2021-12-29 | 2021-12-29 | Device based on roll formula measurement steel pipe internal diameter |
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- 2021-12-29 CN CN202123369789.2U patent/CN216791072U/en active Active
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