An ellipticity detection device for steel pipe processing

Abstract

The present invention discloses an ellipticity detection device for steel pipe processing in the technical field of steel pipe processing, which includes a centering unit, comprising a handle, a first limiting component in a circular ring structure arranged on one side of the top end of the handle, a second limiting component arranged on the other side of the top end of the handle and symmetric with the first limiting component, a transmission component rotatably sleeved between the first limiting component and the second limiting component, and three centering components distributed in a circular manner with the axis line between the first limiting component and the second limiting component as the center. By arranging three centering components that can simultaneously gather and clamp inward, the present invention can achieve the setting of three non-collinear support points on the outer diameter of the steel pipe, forming a stable triangular structure, enhancing the overall stability of the device. At the same time, the three support points can achieve the effect of three-point centering, which can more accurately determine the center position of the steel pipe, reduce measurement errors, and improve the accuracy of ellipticity measurement data.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe processing, and particularly relates to a device for detecting the ovality of steel pipe processing. Background Art

[0002] The measurement of the ovality of steel pipes is a key link in the quality control of steel pipes, and is widely used in the manufacturing process of steel pipes in fields such as petroleum, chemical industry, and electric power. When measuring the ovality of steel pipes, in order to ensure the accuracy and reliability of the measurement results, a centering operation is required. The purpose of the centering operation is to ensure that the axis of the steel pipe is aligned with the axis of the measuring device, so that the straight-line distance from the detection part of the measuring device to the steel pipe is the same, which is convenient for the subsequent measurement work.

[0003] In the prior art, a two-point centering method is mostly used for the centering operation. The traditional two-point centering measurement method has significant limitations in practical applications, especially for the measurement of steel pipes with high-precision requirements. The two-point centering method mainly relies on two relative points on the outer diameter of the steel pipe to determine the center. This method is simple in theory, but in actual operation, it is easily affected by factors such as processing accuracy and measurement environment, resulting in insufficient repeatability and accuracy of the measurement results. Based on this, we hereby propose a device for detecting the ovality of steel pipe processing to solve such problems. Summary of the Invention

[0004] In view of the significant limitations in practical applications of the two-point centering method used in the above-mentioned prior art, resulting in insufficient repeatability and accuracy of the measurement results, the present invention is proposed.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A device for detecting the ovality of steel pipe processing, comprising: a centering unit, including a grip, a first limiting component in a circular ring structure arranged on one side of the top of the grip, a second limiting component arranged on the other side of the top of the grip and in a symmetric position with the first limiting component, a transmission component rotatably sleeved between the first limiting component and the second limiting component, and three centering components distributed in a circular manner around the axis between the first limiting component and the second limiting component, and both ends of each centering component are respectively rotatably connected to the outside of the first limiting component and the inner ring of the transmission component;

[0006] A measurement unit, including a driven component rotatably sleeved on the outer end of the second limiting component, a digital display micrometer vertically inserted on the outside of the top of the driven component, and the end of the digital display micrometer is perpendicular to the center of the second limiting component, and a limit knob threadedly inserted on one side of the top of the driven component and with its inner end abutted against the side of the digital display micrometer.

[0007] The driving unit includes a fixing bracket with a C-shaped structure, and both sides of the upper and lower ends of the C-shaped structure of the fixing bracket are fixedly connected to the outer diameters of the first limiting component and the second limiting component respectively. There are two groups of driving components vertically inserted into the fixing bracket, and the two groups of driving components are respectively meshed with the outer diameters of the transmission component and the driven component. There is a driving assembly vertically arranged at the top end of the fixing bracket, and the lower end of the driving assembly is meshed and driven with the top ends of the two groups of driving components. There is also a conversion component with one end rotatably sleeved on the end of the driving assembly and the other end extending outward to the outside of the grip.

[0008] As a preferred solution of the steel pipe processing ovality detection device described in the present invention, wherein: the first limiting component includes a first sleeve ring with a circular ring structure, and one end of the transmission component is sleeved on the first sleeve ring. There is a first limiting ring fixedly sleeved on the outer end of the first sleeve ring, and the first limiting ring is fixedly connected to the top side of the grip. There are also three first connecting bolts equally spaced around the outside of the inner end of the first sleeve ring, and one end of the centering component is rotatably connected to the first connecting bolt.

[0009] As a preferred solution of the steel pipe processing ovality detection device described in the present invention, wherein: the second limiting component includes a second sleeve ring with a circular ring structure, two second limiting rings fixedly sleeved on both ends of the second sleeve ring, a limiting groove located between the two second limiting rings, and the driven component is sleeved on the limiting groove. There is also a third sleeve ring fixedly connected to the inner end of the second sleeve ring, and the other end of the transmission component is sleeved on the third sleeve ring.

[0010] As a preferred solution of the steel pipe processing ovality detection device described in the present invention, wherein: the transmission component includes a sleeve with a circular ring structure, and the two sleeves are respectively sleeved on the first sleeve ring and the third sleeve ring. There is a transmission ring fixedly connected between the two sleeves, and multiple teeth meshing with the driving component are equally spaced around the outer diameter of the transmission ring. There are also three second connecting bolts equally spaced and fixedly connected to the inner diameter of one of the sleeves, and the other end of the centering component is rotatably connected to the second connecting bolt. The second connecting bolt and the first connecting bolt are not in the same vertical direction, and they are parallel to each other in the vertical direction.

[0011] As a preferred solution of the steel pipe processing ovality detection device described in the present invention, wherein: the centering component includes a first centering rod and a second centering rod with the same structure, and the outer ends of the first centering rod and the second centering rod are respectively rotatably connected to the first connecting bolt and the second connecting bolt. The first centering rod includes a rectangular sliding groove transversely opened inside, and the rectangular sliding groove is in a rectangular structure. There is a rectangular slider in a rectangular structure arranged inside one end of the first centering rod, and a socket is arranged at the other end of the first centering rod. The socket on the first centering rod is rotatably sleeved on the first connecting bolt.

[0012] As a preferred embodiment of the ovality detection device for steel pipe processing according to the present invention, wherein: the driven component includes a ring structure and a driven ring sleeved and rotatably connected to the second collar, and the driven ring is located in the limiting groove between two groups of second limiting rings. A plurality of groups of teeth meshing with the driving component are equally distributed on the outer diameter of the driven ring, and a socket is arranged on one side of the top of the driven ring. The digital micrometer is vertically inserted into the socket, and the limiting knob is horizontally threadedly inserted into the socket.

[0013] As a preferred embodiment of the ovality detection device for steel pipe processing according to the present invention, wherein: the digital micrometer includes a dial located directly above the socket, a probe vertically arranged below the dial, and the probe is inserted downward through the socket, and a limiting slot is vertically opened on the outer wall of the probe, and the limiting knob horizontally passes through the socket and extends into the limiting slot.

[0014] As a preferred embodiment of the ovality detection device for steel pipe processing according to the present invention, wherein: the driving component includes two rotating shafts vertically and rotatably connected in the fixed frame, two spiral racks respectively spirally wound around the two rotating shafts, and the two spiral racks are respectively meshed with the teeth on the outer diameters of the transmission ring and the driven ring, a positive bevel gear and an extension rod respectively arranged at the top of the two rotating shafts, and an inverted bevel gear fixedly arranged at the top of the extension rod.

[0015] As a preferred embodiment of the ovality detection device for steel pipe processing according to the present invention, wherein: the driving assembly includes a driving motor fixedly arranged vertically in the grip, a rectangular shaft arranged at the center of the driving motor and extending downward into the top of the fixed frame in a rectangular structure, and a shuttle-shaped gear vertically and slidably inserted on the rectangular shaft in a shuttle-shaped structure, and the upper and lower ends of the shuttle-shaped gear are respectively meshed and driven with the inverted bevel gear and the positive bevel gear.

[0016] As a preferred embodiment of the ovality detection device for steel pipe processing according to the present invention, wherein: the conversion component includes a connecting rod rotatably sleeved on one end of the shuttle-shaped gear, and the other end of the connecting rod extends outward to the outside of the grip, and a reinforcing block fixedly connected vertically to the outer end of the connecting rod, and one side of the reinforcing block abuts against the outer wall of the grip.

[0017] The beneficial effects of the present invention:

[0018] 1. By arranging three centering components on the centering unit that can simultaneously gather and clamp inward, three non-collinear support points can be set on the outer diameter of the steel pipe to form a stable triangular structure. The triangular support structure can enhance the overall stability of the device and reduce the influence of environmental factors on the measurement results.

[0019] 2. The three groups of centering components are synchronously contacted with the outer diameter of the steel pipe from three directions. By using the calculation method of the geometric center of a triangle and combining the position information of the support points, the central position of the steel pipe is accurately calculated, achieving the effect of three-point centering, which can more accurately determine the central position of the steel pipe and reduce the measurement errors caused by uneven stress and minor deformation.

[0020] 3. The digital display micrometer installed on the measuring unit rotates circumferentially along the outer wall of the steel pipe, and the measurement data at different positions on the circular ring of the same cross-section of the steel pipe can be directly obtained. Ensuring that the measurement points are in the same vertical direction helps to reduce the influence of factors such as pipeline deformation and inclination, thereby significantly improving the measurement accuracy. Moreover, the measurement length of the probe of the digital display micrometer can be adjusted to meet the requirements of measuring the ovality of steel pipes with different diameters and more usage needs. Brief Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Among them:

[0022] Figure 1 It is a schematic diagram of the overall structure of the steel pipe processing ovality detection device of the present invention.

[0023] Figure 2 It is a schematic plan view of the overall structure of the steel pipe processing ovality detection device of the present invention.

[0024] Figure 3 It is a schematic plan view of the internal structure of the steel pipe processing ovality detection device of the present invention.

[0025] Figure 4 It is a schematic plan view of the longitudinal sectional structure of the steel pipe processing ovality detection device of the present invention.

[0026] Figure 5 It is a partial structure schematic diagram of the centering unit of the steel pipe processing ovality detection device of the present invention.

[0027] Figure 6 It is a structure schematic diagram of the first limiting component and the second limiting component of the steel pipe processing ovality detection device of the present invention.

[0028] Figure 7 It is a structure schematic diagram of the transmission component of the steel pipe processing ovality detection device of the present invention.

[0029] Figure 8 It is a structure schematic diagram of the centering component of the steel pipe processing ovality detection device of the present invention.

[0030] Figure 9 This is a schematic diagram of the structural state of the transmission component and the centering component of the ovality detection device for steel pipe processing according to the present invention.

[0031] Figure 10 This is a schematic diagram of the structure of the measurement unit of the ovality detection device for steel pipe processing according to the present invention.

[0032] Figure 11 This is a schematic diagram of the structure of the drive unit of the ovality detection device for steel pipe processing according to the present invention.

[0033] Figure 12 This is a plan view of the installation position of the drive unit of the ovality detection device for steel pipe processing according to the present invention within the grip.

[0034] Reference numerals: 100, centering unit; 101, grip; 101a, slot; 101b, chuck; 102, first limiting member; 102a, first collar; 102b, first limiting ring; 102c, first connecting bolt; 103, second limiting member; 103a, second collar; 103b, second limiting ring; 103c, limiting groove; 103d, third collar; 104, transmission component; 104a, sleeve; 104b, transmission ring; 104c, second connecting bolt; 105, centering component; 105a, first centering rod; 105b, second centering rod; 105c, rectangular sliding groove; 105d, rectangular sliding block; 105e, socket; 200, measurement unit; 201, driven component; 201a, driven ring; 201b, socket; 202, digital micrometer; 202a, dial; 202b, probe; 202c, limiting card slot; 203, limiting knob; 300, drive unit; 301, fixing bracket; 302, drive component; 302a, rotating shaft; 302b, helical rack; 302c, extension rod; 302d, inverted bevel gear; 302e, straight bevel gear; 303, drive assembly; 303a, drive motor; 303b, rectangular shaft; 303c, shuttle-shaped gear; 304, conversion component; 304a, connecting rod; 304b, reinforcement block. Detailed Description of the Invention

[0035] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following detailed description of the specific embodiments of the present invention will be provided in conjunction with the accompanying drawings of the specification.

[0036] In the following description, many specific details are set forth to facilitate a thorough understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] Embodiment 1

[0038] Reference Figures 1 - 2 , which is the first embodiment of the present invention, includes an ovality detection device for steel pipe processing, comprising:

[0039] The centering unit 100 includes a grip 101, a first limiting member 102 in the form of a circular ring structure provided on one side of the top end of the grip 101, a second limiting member 103 provided on the other side of the top end of the grip 101 and in a symmetrical position with the first limiting member 102, a transmission member 104 rotatably sleeved between the first limiting member 102 and the second limiting member 103, and three groups of centering members 105 distributed in a circular manner around the axis between the first limiting member 102 and the second limiting member 103. Both ends of each group of centering members 105 are respectively rotatably connected to the outer side of the first limiting member 102 and the inner ring of the transmission member 104; the grip 101 is used to provide a grasping point during use. The first limiting member 102 and the second limiting member 103 are respectively fixedly connected to the grip 101. The circular first limiting member 102 and the second limiting member 103 can be edge-sleeved on the steel pipe with a circular tube structure. The transmission member 104 can rotate circumferentially with the first limiting member 102 and the second limiting member 103 as the rotation axes. The centering member 105 as a whole is a rectangular strip structure whose length can be changed;

[0040] The measuring unit 200 includes a driven member 201 rotatably sleeved on the outer end of the second limiting member 103, a digital display micrometer 202 vertically inserted on the outer side of the top end of the driven member 201, and the end of the digital display micrometer 202 is perpendicular to the center of the second limiting member 103, and a limiting knob 203 threadedly inserted on one side of the top end of the driven member 201 and with its inner end abutted against the side of the digital display micrometer 202; the driven member 201 can rotate circumferentially with the second limiting member 103 as the axis, and while rotating, the digital display micrometer 202 inserted on its side can move synchronously, so as to drive the digital display micrometer 202 to collect data by surrounding on the same circular cross-section;

[0041] The driving unit 300 includes a fixing bracket 301 with a C-shaped structure. The two sides at the upper and lower ends of the C-shaped structure of the fixing bracket 301 are respectively fixedly connected to the outer diameters of the first limiting member 102 and the second limiting member 103. Two sets of driving members 302 inserted vertically into the fixing bracket 301, and the two sets of driving members 302 are respectively meshed with the outer diameters of the transmission member 104 and the driven member 201. A driving assembly 303 vertically arranged at the top of the fixing bracket 301, and the lower end of the driving assembly 303 is meshed and driven with the tops of the two sets of driving members 302. And a conversion member 304 with one end rotatably sleeved on the end of the driving assembly 303 and the other end extending outward to the outside of the grip 101; the driving assembly 303 can be used to provide the power for the two sets of driving members 302 to rotate, and the two rotating driving members 302 can respectively drive the transmission member 104 and the driven member 201 to rotate. The conversion member 304 can respectively provide the meshing transmission between the driving assembly 303 and the two sets of driving members 302 through upward or downward displacement. Therefore, the two sets of driving members 302 are not meshed with the driving assembly 303 at the same time.

[0042] During the use process, referring to Figure 2 , hold the grip 101 by hand to partially sleeve the first limiting member 102 and the second limiting member 103 on the steel pipe to be measured, keep the conversion member 304 in the lower position, and then start the driving assembly 303. The driving assembly 303 drives a set of driving members 302 meshed with the transmission member 104 to rotate through the conversion member 304. The rotating driving member 302 drives the transmission member 104 to rotate. The rotating transmission member 104 will synchronously drive the three centering members 105 to move. Since the first limiting member 102 remains stationary and the other ends of the centering members 105 are connected to the first limiting member 102, therefore, the three centering members 105 will make synchronous movements towards the inner wall of the steel pipe located in the second limiting member 103 and the first limiting member 102. Finally, the three centering members 105 will abut against the outer wall of the steel pipe and form a triangular support structure. At this time, the steel pipe is located on the axis Z between the first limiting member 102 and the second limiting member 103;

[0043] According to the diameter of the steel pipe, adjust the length of the digital micrometer 202 extending along the axis Z of the first limiting member 102 in the plugged state, so that the end of the digital micrometer 202 abuts against the outer wall of the steel pipe. After the adjustment, fix the position of the digital micrometer 202 through the limiting knob 203. Subsequently, switch the position of the conversion member 304, so that the driving assembly 303 stops driving the transmission member 104 to rotate, and instead drives the driving member 302 meshing with another set of driven members 201 to rotate, thereby driving the driven member 201 to drive the digital micrometer 202 to rotate around the axis Z as the center. During this process, the end of the digital micrometer 202 will always move along the outer wall of the steel pipe, thereby measuring the data of each point at this position, analyzing and recording the data, finding the maximum reading and the minimum reading, which respectively correspond to the maximum outer diameter and the minimum outer diameter of the steel pipe. Finally, use the calculation formula: (maximum outer diameter - minimum outer diameter) / nominal outer diameter × 100% to calculate the ovality of the steel pipe.

[0044] Embodiment 2

[0045] Refer to Figures 2 - 9 , which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: three groups of centering members 105 are used to set three non-collinear supporting contacts J on the outer diameter of the steel pipe to form a stable triangular support structure and simultaneously realize three-point centering operation, thereby more effectively determining the center position of the steel pipe and improving the measurement accuracy and repeatability.

[0046] Compared with Embodiment 1, further, the first limiting member 102 includes a first sleeve ring 102a in a ring structure, and one end of the transmission member 104 is sleeved on the first sleeve ring 102a. A first limiting ring 102b is fixedly sleeved on the outer end of the first sleeve ring 102a, and the first limiting ring 102b is fixedly connected to the top side of the grip 101. And three groups of first connecting bolts 102c are equally distributed around the outer side of the inner end of the first sleeve ring 102a, and one end of the centering member 105 is rotatably connected to the first connecting bolt 102c. The transmission member 104 sleeved on the first sleeve ring 102a is limited in the horizontal direction by the first limiting ring 102b and will not slide off the first sleeve ring 102a in the horizontal direction.

[0047] Among them, the second limiting component 103 includes a second sleeve ring 103a with an annular structure, two groups of second limiting rings 103b fixedly sleeved at both ends of the second sleeve ring 103a, a limiting groove 103c located between the two groups of second limiting rings 103b, and the driven component 201 is sleeved on the limiting groove 103c. In addition, a third sleeve ring 103d fixedly connected to the inner end of the second sleeve ring 103a, and the other end of the transmission component 104 is sleeved on the third sleeve ring 103d. The first sleeve ring 102a and the third sleeve ring 103d are respectively clamped on both sides of the transmission component 104, limiting the transmission component 104 in the horizontal direction between them, but not limiting it in the circumferential direction. The transmission component 104 can normally rotate circumferentially with the first sleeve ring 102a and the second limiting ring 103b as the axis. The driven component 201 located between the two groups of second limiting rings 103b is also limited in the horizontal direction and will not slide off in the horizontal direction. However, the driven component 201 can rotate circumferentially with the second sleeve ring 103a as the axis.

[0048] Among them, the transmission component 104 includes a sleeve 104a with an annular structure, and two groups of sleeves 104a are respectively sleeved on the first sleeve ring 102a and the third sleeve ring 103d. A transmission ring 104b fixedly connected between the two groups of sleeves 104a, and a plurality of teeth meshing with the driving component 302 are equally distributed and arranged around the outer diameter of the transmission ring 104b. In addition, three groups of second connecting bolts 104c are equally distributed and fixedly connected to the inner diameter of one of the sleeves 104a, and the other end of the centering component 105 is rotatably connected to the second connecting bolt 104c. The second connecting bolt 104c and the first connecting bolt 102c are not in the same vertical direction, and they are parallel to each other in the vertical direction. The transmission component 104 is rotatably connected between the first limiting component 102 and the second limiting component 103 through the sleeves 104a on both sides. Due to the meshing of the transmission ring 104b and the limiting knob 203, the limiting knob 203 can drive the transmission ring 104b to drive the whole transmission component 104 to rotate circumferentially.

[0049] Among them, the centering component 105 includes a first centering rod 105a and a second centering rod 105b with the same structure. The outer ends of the first centering rod 105a and the second centering rod 105b are respectively rotatably connected to the first connecting bolt 102c and the second connecting bolt 104c. The first centering rod 105a includes a rectangular sliding groove 105c transversely opened inside, and the rectangular sliding groove 105c has a rectangular structure. A rectangular slider 105d with a rectangular structure is arranged inside one end of the first centering rod 105a, and a socket 105e is arranged at the other end of the first centering rod 105a. The socket 105e on the first centering rod 105a is rotatably sleeved on the first connecting bolt 102c. Because the first centering rod 105a and the second centering rod 105b have the same structure, the second centering rod 105b is also provided with corresponding rectangular sliding groove 105c, rectangular slider 105d and socket 105e.

[0050] Furthermore, the first centering rod 105a and the second centering rod 105b are arranged in parallel in the vertical direction, so they are staggeredly distributed. Therefore, when they rotate circumferentially on the same vertical plane synchronously, they do not interfere with each other in the vertical direction. The first centering rod 105a and the second centering rod 105b extend into the rectangular sliding grooves 105c of each other through the rectangular sliders 105d provided at their inner ends. Since both the rectangular sliding grooves 105c and the rectangular sliders 105d are rectangular structures, the first centering rod 105a and the second centering rod 105b can only slide on the side surfaces of each other in a translational manner, so that their side surfaces are always in the same plane. Thus, when clamping the steel pipe, there is always a contact point J in contact with the outer wall.

[0051] During use, combined with Figure 2 and Figure 9 , when the transmission component 104 rotates, it will drive the corresponding second centering rod 105b to move through the second connecting bolt 104c. Since the other end of the first centering rod 105a is connected to the first connecting bolt 102c, the second centering rod 105b will translate and slide while fitting on the surface of the first centering rod 105a, and rotate through the rotational connection between its outer end and the second connecting bolt 104c, so as to adapt to the changes brought about by the rotation of the transmission component 104. Due to the continuous rotation of the transmission component 104, the overall length of the centering component 105 will also continuously increase. The way of length increase will make the distance between the side of the centering component 105 and the axis Z continuously shorten. The three centering components 105 move synchronously following the transmission component 104. Therefore, the side surfaces of the three centering components 105 continuously approach the axis Z and shorten the space between them. At this time, the steel pipe is horizontally inserted into the space between the three centering components 105. Above, it will be pushed by the three centering components 105 from three directions and gradually pushed to coincide with the axis Z. At this time, the way the three centering components 105 push the steel pipe achieves the function of three-point centering. Through the three-point centering method, the center position of the steel pipe can be determined more accurately;

[0052] Furthermore, three contact points J are formed at the positions where the three centering components 105 contact the outer wall of the steel pipe. The three contact points J can apply pressure to the steel pipe from three directions, and the distances between the three contact points J are equal, so that the stress points are more uniform, reducing the measurement error caused by uneven stress and minor deformation;

[0053] At the same time, the three contact points J are not collinear. Cooperating with the three centering components 105 to form a triangular support structure, three non-collinear support points can be set on the outer diameter of the steel pipe to form a stable triangular structure. The triangular support structure can enhance the overall stability of the device and reduce the influence of environmental factors on the measurement results.

[0054] The remaining structure is the same as that of Embodiment 1.

[0055] Embodiment 3

[0056] Referring to Figure 2 and Figure 10 , which is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that by rotating circumferentially along the outer wall of the steel pipe to be measured, the measurement data at different positions on the circular ring of the same cross-section of the steel pipe can be directly obtained, ensuring the accuracy of the measurement data.

[0057] Compared with Embodiment 2, further, the driven component 201 includes a circular ring structure and a driven ring 201a sleeved and rotatably connected to the second collar 103a, and the driven ring 201a is located in the limiting groove 103c between two groups of second limiting rings 103b. A plurality of groups of teeth meshing with the driving component 302 are equally distributed on the outer diameter of the driven ring 201a, and a socket 201b is arranged on one side of the top end of the driven ring 201a. The digital micrometer 202 is vertically inserted into the socket 201b, and the limit knob 203 is horizontally threadedly inserted into the socket 201b. Through the meshing of the driving component 302 and the driven ring 201a, the driving component 302 can drive the driven ring 201a to rotate around the second collar 103a as the axis.

[0058] Among them, the digital micrometer 202 includes a dial 202a located directly above the socket 201b, a probe 202b vertically arranged below the dial 202a, and the probe 202b is inserted downward through the socket 201b. A limiting groove 202c is vertically opened on the outer wall of the probe 202b, and the limit knob 203 horizontally passes through the socket 201b and extends into the limiting groove 202c. The probe 202b is slidably inserted into the socket 201b and can perform vertical telescopic displacement. The limit knob 203 extending into the limiting groove 202c can limit and fix the probe 202b by abutting.

[0059] During use, according to the diameter of the steel pipe to be measured, the extended length of the probe 202b is adjusted so that the end of the probe 202b abuts against the outer wall of the steel pipe, and then the limit knob 203 is rotated to extend it into the limit slot 202c, and the probe 202b is firmly limited so that it cannot be separated from the socket 201b. It can be seen that the measuring length of the probe 202b can be adjusted according to the diameter of the steel pipe to be measured, so that the device can meet the requirements of the ovality measurement of steel pipes with different diameters. Since the centering unit 100 has fixedly limited the device on the steel pipe, the driving component 302 drives the driven component 201 to rotate as a whole. The rotating driven component 201 can drive the digital micrometer 202 to rotate in a circle along the outer wall of the steel pipe as a whole, and the motion trajectory of the digital micrometer 202 is in the same cross-section ring, thereby achieving the acquisition of measurement data at different positions on the same vertical cross-section of the steel pipe in a circular manner, which helps to reduce the influence of factors such as pipeline deformation and inclination, thereby significantly improving the measurement accuracy and ensuring the accuracy of the measurement data.

[0060] Example 4

[0061] Reference Figures 11 - 12 , which is the fourth embodiment of the present invention. This embodiment is different from the third embodiment in that by switching the position state of the conversion component 304, a single drive motor 303a is implemented to drive the centering unit 100 to perform automatic centering clamping and the measuring unit 200 to surround the steel pipe for data collection and measurement.

[0062] Compared with Example 3, further, the driving component 302 includes two groups of rotating shafts 302a connected to the fixed frame 301 in a vertical direction, two groups of spiral racks 302b spirally wound on the two groups of rotating shafts 302a, and the two groups of spiral racks 302b are respectively meshed with teeth on the outer diameter of the transmission ring 104b and the driven ring 201a, the positive bevel gears 302e and the extension rod 302c are respectively arranged on the top of the two groups of rotating shafts 302a, and the inverted bevel gear 302d fixedly arranged on the top of the extension rod 302c, the spiral structure of the spiral racks 302b is meshed with the teeth on the outer side of the sleeve 104a and the driven ring 201a, which can form a worm gear structure, and the worm gear has a self-locking performance, that is, when the worm does not rotate, the gear cannot rotate. Therefore, after the centering unit 100 clamps the device as a whole on the steel pipe, the driving component 302 is stopped to ensure that the device is firmly held on the steel pipe.

[0063] Further, the driving component 302 installed with the positive bevel gear 302e meshes with the transmission ring 104b, and the driving component 302 installed with the reverse bevel gear 302d meshes with the driven ring 201a. The positive bevel gear 302e has a structure that is thinner at the top and thicker at the bottom, and meshes and transmits power with the lower part of the shuttle-shaped gear 303c. The reverse bevel gear 302d has a structure that is thinner at the bottom and thicker at the top, and can mesh and transmit power with the top of the shuttle-shaped gear 303c. At the same time, there is a height difference between the positive bevel gear 302e and the reverse bevel gear 302d.

[0064] Among them, the driving assembly 303 includes a driving motor 303a fixedly arranged vertically in the grip 101, a rectangular shaft 303b arranged at the axial center of the driving motor 303a and extending downward into the top end of the fixing frame 301 in a rectangular structure, and a shuttle-shaped gear 303c vertically and slidably inserted on the rectangular shaft 303b in a shuttle shape. The upper and lower ends of the shuttle-shaped gear 303c respectively mesh and transmit power with the reverse bevel gear 302d and the positive bevel gear 302e. The rectangular shaft 303b with a rectangular structure is circumferentially limited with the shuttle-shaped gear 303c and can rotate circumferentially following the rectangular shaft 303b. The shuttle-shaped gear 303c can slide vertically along the rectangular shaft 303b. The top end of the shuttle-shaped gear 303c with a shuttle shape matches and meshes with the reverse bevel gear 302d, and the lower end matches and meshes with the positive bevel gear 302e.

[0065] Further, a slot 101a is formed on the side surface of the grip 101. One end of the conversion component 304 passes through the slot 101a and extends to the outside. A clamping block 101b is horizontally arranged at the middle position of the slot 101a, and one side of the clamping block 101b is fixedly connected to the grip 101.

[0066] Among them, the conversion component 304 includes a connecting rod 304a rotatably sleeved on one end of the shuttle-shaped gear 303c, and the other end of the connecting rod 304a extends outward to the outside of the grip 101, and a reinforcing block 304b fixedly connected vertically to the outer end of the connecting rod 304a. One side of the reinforcing block 304b abuts against the outer wall of the grip 101. The connecting rod 304a and the shuttle-shaped gear 303c are vertically limited to each other and can drive the shuttle-shaped gear 303c to slide vertically. At the same time, the reinforcing block 304b can apply a horizontal force between the whole conversion component 304 and the grip 101, so as to keep the conversion component 304 in a horizontally arranged state.

[0067] During use, the conversion component 304 is toggled downward so that the connecting rod 304a is clamped below the clamping block 101b. At this time, the end of the spindle gear 303c abuts and meshes with the positive bevel gear 302e. Rotating the drive motor 303a can drive the corresponding drive component 302 of the positive bevel gear 302e to rotate, thereby driving the transmission component 104 to perform a rotational action; conversely, toggling the conversion component 304 upward disconnects the engagement between the positive bevel gear 302e and the lower end of the spindle gear 303c, while the top of the spindle gear 303c abuts and meshes with the inverted bevel gear 302d, which can drive the corresponding drive component 302 to drive the driven component 201 to rotate; as can be seen from the above, by simply adjusting the position of the conversion component 304, the centering unit 100 and the measuring unit 200 can be respectively driven to perform three-point centering and circumferential measurement operations, making the operation of the device more convenient and simple, and significantly improving work efficiency.

[0068] The remaining structures are the same as those of Embodiment 3.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An ellipticity detection device for steel pipe processing, characterized in that: It includes a centering unit (100), which includes a grip (101), a first limiting component (102) in a circular ring structure arranged on one side of the top end of the grip (101), a second limiting component (103) arranged on the other side of the top end of the grip (101) and in a symmetric position with the first limiting component (102), a transmission component (104) rotatably sleeved between the first limiting component (102) and the second limiting component (103), and three groups of centering components (105) distributed in a circular manner with the axis line between the first limiting component (102) and the second limiting component (103) as the center of the circle. And both ends of each group of centering components (105) are respectively rotatably connected to the outside of the first limiting component (102) and the inner ring of the transmission component (104). A measuring unit (200), which includes a driven component (201) rotatably sleeved on the outer end of the second limiting component (103), a digital display micrometer (202) vertically inserted into the outside of the top end of the driven component (201), and the end of the digital display micrometer (202) is perpendicular to the center of the second limiting component (103), and a limiting knob (203) threadedly inserted into one side of the top end of the driven component (201) and with its inner end abutted against the side of the digital display micrometer (202). A driving unit (300), which includes a fixing frame (301) in a C-shaped structure, and both sides of the upper and lower ends of the C-shaped structure of the fixing frame (301) are respectively fixedly connected to the outer diameters of the first limiting component (102) and the second limiting component (103), two groups of driving components (302) vertically inserted into the fixing frame (301), and the two groups of driving components (302) are respectively meshed with the outer diameters of the transmission component (104) and the driven component (201), a driving assembly (303) vertically arranged at the top end of the fixing frame (301), and the lower end of the driving assembly (303) is meshed and driven with the top end of the driving component (302), and a conversion component (304) with one end rotatably sleeved on the end of the driving assembly (303) and the other end extending out of the grip (101) to the outside.

2. The steel pipe processing ovality detection device according to claim 1, characterized in that: The first limiting component (102) includes a first sleeve ring (102a) in a circular ring structure, and one end of the transmission component (104) is sleeved on the first sleeve ring (102a), a first limiting ring (102b) fixedly sleeved on the outer end of the first sleeve ring (102a), and the first limiting ring (102b) is fixedly connected to the side surface of the top end of the grip (101), and three groups of first connecting bolts (102c) equally distributed and surrounded on the outside of the inner end of the first sleeve ring (102a), and one end of the centering component (105) is rotatably connected to the first connecting bolt (102c).

3. The steel pipe processing ovality detection device according to claim 1, characterized in that: The second limiting component (103) includes a second collar (103a) with an annular structure, two groups of second limiting rings (103b) fixedly sleeved at both ends of the second collar (103a), a limiting groove (103c) located between the two groups of second limiting rings (103b), and the driven component (201) is sleeved on the limiting groove (103c), and a third collar (103d) fixedly connected to the inner end of the second collar (103a), and the other end of the transmission component (104) is sleeved on the third collar (103d).

4. The steel pipe processing roundness detection device according to claim 1, characterized in that: The transmission component (104) includes a sleeve (104a) with an annular structure, and the two groups of sleeves (104a) are respectively sleeved on the first collar (102a) and the third collar (103d), a transmission ring (104b) fixedly connected between the two groups of sleeves (104a), and multiple groups of teeth meshing with the driving component (302) are evenly arranged around the outer diameter of the transmission ring (104b), and three groups of second connecting bolts (104c) are equally divided and fixedly connected to the inner diameter of one of the sleeves (104a), and the other end of the centering component (105) is rotatably connected to the second connecting bolt (104c), and the second connecting bolt (104c) and the first connecting bolt (102c) are not in the same vertical direction, and they are parallel to each other in the vertical direction.

5. The steel pipe processing ovality detection device according to claim 1, characterized in that: The centering component (105) includes a first centering rod (105a) and a second centering rod (105b) with the same structure, and the outer ends of the first centering rod (105a) and the second centering rod (105b) are respectively rotatably connected to the first connecting bolt (102c) and the second connecting bolt (104c). The first centering rod (105a) includes a rectangular sliding groove (105c) transversely opened inside, and the rectangular sliding groove (105c) has a rectangular structure, a rectangular slider (105d) arranged in the rectangular structure on the inner side of one end of the first centering rod (105a), and a socket (105e) arranged at the other end of the first centering rod (105a), and the socket (105e) on the first centering rod (105a) is rotatably sleeved on the first connecting bolt (102c).

6. The steel pipe processing ovality detection device according to claim 1, characterized in that: The driven component (201) includes a driven ring (201a) with an annular structure and sleeved and rotatably connected to the second collar (103a), and the driven ring (201a) is located in the limiting groove (103c) between the two groups of second limiting rings (103b). Multiple groups of teeth meshing with the driving component (302) are evenly arranged on the outer diameter of the driven ring (201a), and a socket (201b) is arranged on one side of the top of the driven ring (201a), and a digital micrometer (202) is vertically inserted into the socket (201b), and a limit knob (203) is horizontally threadedly inserted into the socket (201b).

7. The steel pipe processing ovality detection device according to claim 1, wherein: The digital micrometer (202) includes a dial (202a) located directly above the socket (201b), a probe (202b) vertically arranged below the dial (202a), and the probe (202b) is inserted downward through the socket (201b), and a limit card slot (202c) vertically opened on the outer wall of the probe (202b), and the limit knob (203) horizontally passes through the socket (201b) and extends into the limit card slot (202c).

8. The steel pipe processing roundness detection device according to claim 1, characterized in that: The driving component (302) includes two groups of rotating shafts (302a) vertically rotatably connected within the fixing frame (301), two groups of spiral racks (302b) respectively spirally wound around the two groups of rotating shafts (302a), and the two groups of spiral racks (302b) are respectively meshed with the teeth on the outer diameters of the transmission ring (104b) and the driven ring (201a), a positive bevel gear (302e) and an extension rod (302c) respectively arranged at the tops of the two groups of rotating shafts (302a), and an inverted bevel gear (302d) fixedly arranged at the top of the extension rod (302c).

9. The steel pipe processing ovality detection device according to claim 1, characterized in that: The driving assembly (303) includes a driving motor (303a) vertically fixedly arranged within the grip (101), a rectangular shaft (303b) arranged at the axial center position of the driving motor (303a) and extending downward into the top of the fixing frame (301) and having a rectangular structure, and a shuttle-shaped gear (303c) vertically slidably inserted on the rectangular shaft (303b) and having a shuttle-shaped structure, and the upper and lower ends of the shuttle-shaped gear (303c) are respectively meshed and driven with the inverted bevel gear (302d) and the positive bevel gear (302e).

10. The steel pipe processing ovality detection device according to claim 9, characterized in that: The conversion component (304) includes a connecting rod (304a) with one end rotatably sleeved on the shuttle-shaped gear (303c), and the other end of the connecting rod (304a) extends outward to the outside of the grip (101), and a reinforcing block (304b) vertically fixedly connected to the outer end of the connecting rod (304a), and one side of the reinforcing block (304b) abuts against the outer wall of the grip (101).

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