Bridge steel template flatness detection device

Abstract

The invention relates to the technical field of flatness detection, in particular to a bridge steel formwork flatness detection device which comprises a roller conveyor, a light shield is fixedly arranged in the middle of the roller conveyor, an interference detection unit is arranged in the light shield, and a position correcting unit and a marking unit are arranged on the front side and the rear side of the light shield respectively. According to the bridge steel formwork flatness detection device, through the linear layout of the roller conveyor, the position correcting unit, the pneumatic jacking unit, the interference detection unit and the marking unit, continuous operation of formwork positioning, detection and marking is achieved, the manual intervention link is thoroughly eliminated, other consumables are not needed, the production efficiency is improved, and the production cost is reduced. The position correcting plates on the two sides can rapidly correct the posture of the template, alignment of the template and the reflection detection unit above the template is ensured, the template is separated from a roller way through pressure-equalizing jacking of the pneumatic array ejector pins, the conveying vibration influence is eliminated, and an unstressed reference plane is provided for interference detection.

Description

Technical Field

[0001] The present invention relates to the technical field of flatness detection, in particular to a bridge steel template flatness detection device. Background Art

[0002] Steel formwork is a material of a certain shape, size and performance made from steel ingots, billets or steel through pressure processing. Most steel processing is done through pressure processing, which causes the processed steel to undergo plastic deformation. Depending on the steel processing temperature, it can be divided into cold processing and hot processing. After processing, the cold-rolled steel plate may have different thicknesses at different positions on the same steel plate, resulting in defects in the steel plate and an uneven surface, which affects its use.

[0003] The surface flatness of existing steel formwork bodies is mainly detected by small-range laser displacement sensors, which have high precision and are not suitable for the overall flatness detection of large-area steel formworks. In addition, the detection efficiency is low and is not suitable for large-scale detection operations.

[0004] In response to the above problems, Chinese patent: CN202311852448.1 discloses a bridge steel formwork flatness detection device, which relates to the field of flatness detection technology, including a bracket, two groups of brackets are symmetrically arranged, horizontal rollers are provided on the bracket, and guide rollers are provided on the edges of the horizontal rollers. The steel formwork body is evenly placed on the bracket, a driving slide rail is provided in the bracket, a conveying mechanism is provided between the two groups of brackets, and the conveying mechanism is slidably installed between the driving slide rail. A detection mechanism is also provided on the bracket; the detection mechanism includes a spotlight and a reflective film arranged inside the detection cover, and the reflective film is pasted on the surface of the steel formwork body through an adhesive component, and the reflected light is captured in combination with the photoreceptor on the receiving plate. When the photoreceptor senses the light, it indicates that the flatness of the steel formwork body at this position is unqualified. The above structure can realize rapid detection of a large area of the steel formwork body, and at the same time, the uneven parts are marked in combination with the marking mechanism.

[0005] However, the above-mentioned existing technology also requires the use of a reflective film during detection, which is not only complicated to operate, but also requires the reflective film to be pasted to the surface of the steel template before each detection and removed after the detection. However, the reflective film is a disposable consumable, which increases the material cost, and the pasting / removal process is time-consuming, which increases the detection time.

[0006] To this end, we propose a bridge steel formwork flatness detection device. Summary of the Invention

[0007] In order to solve the above technical problems, an embodiment of the present application provides a bridge steel formwork flatness detection device, including a roller conveyor, a light shield is fixedly arranged in the middle of the roller conveyor, an interference detection unit is arranged in the light shield, and a positioning unit and a marking unit are respectively arranged on the front and rear sides of the light shield, and a pneumatic array ejector unit is arranged under the roller conveyor, and the pneumatic array ejector unit is arranged directly below the light shield.

[0008] In some embodiments, the interference detection unit includes a monochromatic light source and a CCD camera fixedly arranged on the top inner side of the light shield, and fixed rods are fixedly arranged on the front and rear sides of the light shield, and the bottom end of one of the fixed rods is rotatably connected to an electric push rod. A glass plate is also provided in the light shield, and the glass plate is arranged in an inclined shape in the light shield, and the front and rear sides of the glass plate are rotatably connected to the end of the electric push rod and the bottom end of the fixed rod away from the electric push rod respectively.

[0009] In some embodiments, the monochromatic light source includes a substrate and a plurality of monochromatic light-emitting units, the plurality of monochromatic light-emitting units are distributed in an array on a supporting surface of the substrate, and the CCD camera is disposed in the middle of the substrate.

[0010] In some embodiments, the angle between the glass plate and the steel template is 0.8°-1.5°.

[0011] In some embodiments, the pneumatic array ejector unit includes a fixed frame fixedly arranged at the bottom of the roller conveyor, a plurality of ejector cylinders are arranged on the fixed frame, and ejectors are arranged at output ends of the ejector cylinders.

[0012] In some embodiments, the alignment unit includes two alignment cylinders fixedly arranged on both sides of the roller conveyor, the two alignment cylinders are symmetrically arranged relative to the roller conveyor, and the output ends of the two alignment cylinders are both provided with alignment plates, and the alignment plates are L-shaped.

[0013] In some embodiments, a plurality of rollers are rotatably provided on the surface of the alignment plate, and a guide plate is fixedly provided on a side of the alignment plate away from the conveying direction of the roller conveyor.

[0014] In some embodiments, the marking unit includes a track arranged above the roller conveyor, a slider is arranged in the track, the slider is driven by a screw transmission system, a support is fixedly arranged on the slider, a marking cylinder is arranged on the support, the output end of the marking cylinder passes through the support and two marking blocks are arranged at the end, the two marking blocks are made of sponge material and are soaked in pigment, and the pigments in the two marking blocks are different in color.

[0015] In some embodiments, a slide rail is provided at the output end of the marking cylinder, a switching block is slidingly provided in the slide rail, a switching cylinder is provided on one side of the slide rail, the output end of the switching cylinder is connected to the switching block, slots are provided on the switching block at the positions corresponding to the two marking blocks, vertical rods are slidingly provided in the two slots, the marking block is fixedly provided at the bottom end of the vertical rod, a magnetic plate 1 is provided at the top of the vertical rod, a magnetic plate 2 is provided in the middle of the slide rail, the magnetic plate 1 and the magnetic plate 2 repel each other, a reset spring is provided on the outside of the vertical rod, and the two ends of the reset spring are respectively connected to the magnetic plate 1 and the bottom of the slot.

[0016] In some embodiments, a rubber pad is fixedly provided on one side of the bottom of the glass plate at a position corresponding to an edge of the template.

[0017] The present invention has at least the following beneficial effects: 1. Through the linear layout of roller conveyor → positioning unit → pneumatic lifting → interference detection → marking unit, the continuous operation of template positioning, detection and marking is realized, completely eliminating the manual intervention link and no other consumables are required; 2. The alignment plates on both sides can quickly correct the template's posture to ensure its alignment with the reflective detection unit above. The pneumatic array ejector's pressure-equalizing lifts the template off the roller, eliminating the impact of conveying vibration and providing a stress-free reference plane for interference detection. 3. The electric push rod can adjust the angle of the glass plate, dynamically adapt to templates with different surface conditions, and generate interference fringes with clear boundaries in the wedge-shaped air film, thereby improving detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Another structural diagram; Figure 3 Schematic diagram of the structure of the interference detection unit of the present invention; Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram; Figure 5 This is a schematic structural diagram of the substrate of the present invention; Figure 6 Schematic diagram of the structure of the positive unit of the present invention; Figure 7 This is a schematic diagram of the structure of the pneumatic array ejector unit of the present invention; Figure 8 This is a schematic diagram of the track structure of the present invention; Figure 9 Schematic diagram of the structure of the marking unit of the present invention; Figure 10This is a schematic diagram of the cross-sectional structure of the slide rail of the present invention; Figure 11 This is a schematic diagram of the interference fringe structure of the template of the present invention; Figure 12 Schematic diagram of the unqualified interference fringe structure of the template of the present invention Figure 1 ; Figure 13 Schematic diagram of the unqualified interference fringe structure of the template of the present invention Figure 2 .

[0019] In the figure: 1. Roller conveyor; 2. Light shield; 3. Interference detection unit; 31. Monochromatic light source; 311. Base plate; 312. Monochromatic light emitting unit; 32. CCD camera; 33. Fixed rod; 34. Electric push rod; 35. Glass plate; 4. Alignment unit; 41. Alignment cylinder; 42. Alignment plate; 43. Guide plate; 5. Marking unit; 51. Track; 52. Slider; 53. Support; 54. Marking cylinder; 55. Marking block; 56. Slide rail; 57. Switching block; 58. Switching cylinder; 59. Notch; 510. Vertical rod; 511. Magnetic plate 1; 512. Magnetic plate 2; 513. Return spring; 6. Pneumatic array ejector unit; 61. Fixed frame; 62. Ejector cylinder; 63. Ejector; 7. Rubber pad. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1-Figure 2The present invention provides a technical solution: a bridge steel formwork flatness detection device, including a roller conveyor 1, the roller conveyor 1 is used to move the formwork, which is a prior art, and the specific principle and structure are not repeated here. A light shield 2 is fixedly arranged in the middle of the roller conveyor 1, and its cover body adopts a double-layer steel plate sandwiched with light-absorbing cotton structure, and is coated with a black matte coating on the inside. Both sides of the light shield 2 are fixedly installed on the frame of the roller conveyor 1 by bolts, and the light shield 2 is provided with multiple light shielding curtains on both sides along the length direction of the roller conveyor 1. The light shielding curtains are provided in multiple numbers and are made of flexible material, and their surfaces are also coated with a black matte coating. The inside of the light shield 2 can be sealed by the cover body of the light shield 2 and the light shielding curtains to prevent external light sources from affecting the detection results, and the setting of the light shielding curtains will not affect the normal transportation of the formwork. An interference detection unit 3 is provided in the light shield 2. When the roller conveyor 1 sends the template into the light shield 2, the interference detection unit 3 can detect the flatness of the template surface. A positioning unit 4 and a marking unit 5 are respectively provided on the front and back sides of the light shield 2. The positioning unit 4 is located on the entrance side of the light shield 2. The purpose is to adjust the position of the template before the template enters the light shield 2 so that it can be located directly below the interference detection unit 3 after entering the light shield 2. A pneumatic array ejector unit 6 is provided under the roller conveyor 1, which is located in the roller gap of the roller conveyor 1. The pneumatic array ejector unit 6 is provided directly below the light shield 2. When the template enters the light shield 2, the pneumatic array ejector unit 6 lifts the template so that it is off the roller and close to the interference detection unit 3, and then detects the template.

[0022] In summary, during inspection, the template is transported by a roller conveyor, and then the position of the template is adjusted by the positioning unit 4. The template is then transported into the light shield 2, and the pneumatic array ejector unit 6 synchronously lifts the template off the roller surface. The interference detection unit 3 completes the flatness scan. After the inspection is completed, the pneumatic array ejector unit 6 lowers the template onto the roller conveyor, and the template is continued to be transported to the marking unit 5. The marking unit 5 sprays a mark at the defect position according to the inspection results.

[0023] Example 2: Please refer to Figure 3-Figure 5The present invention provides a technical solution: a bridge steel template flatness detection device, the interference detection unit 3 includes a monochromatic light source 31 and a CCD camera 32 fixedly arranged on the top of the inner side of the light shield 2, and fixed rods 33 are fixedly arranged on the front and rear sides of the light shield 2, and the bottom end of one of the fixed rods 33 is rotatably connected to an electric push rod 34. A glass plate 35 is also arranged in the light shield 2, and the glass plate 35 is arranged in an inclined shape in the light shield 2. The front and rear sides of the glass plate 35 are respectively rotatably connected to the end of the electric push rod 34 and the bottom end of the fixed rod 33 away from the electric push rod 34. The two fixed rods 33 constitute a support frame for supporting the glass plate 35, and the setting of the electric push rod 34 can realize the angle adjustment of the glass plate 35, so that the optical glass plate 35 is suspended in the internal space of the light shield 2 at a precisely controllable tilt angle. The electric push rod 34 is preferably used as the angle adjustment actuator. Compared with the pneumatic solution, it has micro-displacement control capability and compression-free hysteresis characteristics, which can achieve precise tilt angle repeatability. During the detection process, the monochromatic light source 31 emits a uniform and stable coherent light beam downward. After penetrating the glass plate 35, it undergoes multiple reflections in the wedge-shaped air film formed between the glass plate 35 and the steel template, generating an interference fringe pattern of alternating light and dark based on the physical principle of thin film interference. The spatial deformation characteristics of the fringe are captured in real time by the high-resolution CCD camera 32. Through the mapping relationship between the fringe distortion amount and the surface undulation, the precise quantitative analysis of the microscopic undulations on the surface of the steel template is finally achieved.

[0024] The monochromatic light source 31 includes a substrate 311 and multiple monochromatic light-emitting units 312. The multiple monochromatic light-emitting units 312 are distributed in an array on the supporting surface of the substrate 311. Each monochromatic light-emitting unit 312 emits parallel light for irradiation. The CCD camera 32 is set in the middle of the substrate 311, and the interference fringes can be fully observed through the CCD camera 32. The flatness of the template is analyzed by the changes in the interference fringes.

[0025] The angle between the glass plate 35 and the steel template is 0.8°-1.5°. When the coherent light beam of the monochromatic light source 31 penetrates the glass plate 35 and undergoes multiple reflections in this air layer, this inclination angle range can ensure the generation of an interference fringe pattern with moderate spacing and clear boundaries, thereby meeting the accuracy requirements in the field of template detection and ensuring that the contrast of the interference fringes maintains a reliable level.

[0026] Example 3: Please refer to Figure 7The present invention provides a technical solution: a device for detecting the flatness of a bridge steel formwork, wherein a pneumatic array ejector unit 6 comprises a fixing frame 61 fixedly arranged at the bottom of a roller conveyor 1, and a plurality of ejector cylinders 62 are arranged on the fixing frame 61, and an ejector pin 63 is arranged at the output end of the ejector cylinder 62. The plurality of ejector cylinders 62 are designed to be evenly spaced along the length direction of the roller conveyor 1, and the specific number thereof can be adjusted according to the size of the formwork. The ejector pin 63 is connected to the output end of the ejector cylinder 62 through a quick-change interface, which is convenient for disassembly and installation, and the top end of the ejector pin 63 can be nested with an isolation pad to play a role of buffering and isolation. When the ejector cylinder 62 drives the ejector pin 63 to rise, the ejector pin 63 lifts the steel formwork off the roller conveyor, and the plurality of ejector cylinders 62 are connected by a parallel air path to realize the synchronous lifting and lowering of the plurality of ejector pins 63.

[0027] Example 4: Please refer to Figure 6 The present invention provides a technical solution: a bridge steel formwork flatness detection device, the positioning unit 4 includes two positioning cylinders 41 respectively fixed on both sides of the roller conveyor 1, the two positioning cylinders 41 are symmetrically arranged relative to the roller conveyor 1, and the output ends of the two positioning cylinders 41 are each provided with a positioning plate 42, and the positioning plate 42 is L-shaped. When the formwork is conveyed to pass through the positioning unit 4, the positioning cylinder 41 starts to drive the positioning plate 42 to move, and the two positioning plates 42 squeeze and position the formwork.

[0028] The surface of the alignment plate 42 is provided with a plurality of rollers for rotation, so that the position of the template can be adjusted without affecting the normal transportation of the template. The rollers convert the friction between the alignment plate 42 and the template into rolling friction, so that the template moves more smoothly. A guide plate 43 is fixedly provided on the side of the alignment plate 42 away from the conveying direction of the roller conveyor 1. The guide plate 43 is set at an angle. The guide plate 43 pre-corrects the template. When the edge of the template contacts the guide plate 43, it will move along the surface of the guide plate 43 until it is guided between the alignment plates 42.

[0029] Example 5: Please refer to Figures 8-10 The present invention provides a technical solution: a device for detecting the flatness of a bridge steel formwork, a marking unit 5 including a track 51 arranged above a roller conveyor 1, a slider 52 arranged in the track 51, the slider 52 being driven by a screw transmission system, a support 53 fixedly arranged on the slider 52, a marking cylinder 54 arranged on the support 53, an output end of the marking cylinder 54 passes through the support 53 and two marking blocks 55 are arranged at the end, the two marking blocks 55 are made of sponge material and are soaked in pigment, and the pigments in the two marking blocks 55 are different in color.

[0030] A slide rail 56 is provided at the output end of the marking cylinder 54, and a switching block 57 is slidably provided in the slide rail 56. A switching cylinder 58 is provided on one side of the slide rail 56, and the output end of the switching cylinder 58 is connected to the switching block 57. When the switching cylinder 58 extends or contracts, it can drive the switching block 57 to move in the slide rail 56. Slots 59 are provided on the switching block 57 at the positions corresponding to the two marking blocks 55. Vertical rods 510 are slidably provided in the two slots 59. The marking block 55 is fixedly provided at the bottom end of the vertical rod 510, and a magnetic plate 1 511 is provided at the top of the vertical rod 510. A magnetic plate 2 512 is provided in the middle of the slide rail 56. The magnetic plate 1 511 and the magnetic plate 2 512 repel each other. A return spring 513 is provided on the outside of the vertical rod 510, and the two ends of the return spring 513 are respectively connected to the magnetic plate 1 511 and the bottom of the slot 59; When the switching cylinder 58 drives the switching block 57 to move, the magnetic plate 1 511 at the corresponding position of the magnetic plate 2 512 is repelled and drives the vertical rod 510 to move, and the vertical rod 510 drives the marking block 55 at its bottom end to move downward. At this time, the two marking blocks 55 have a height difference. The marking block 55 at the bottom can mark the template, that is, the marking cylinder 54 drives the slide rail 56 to move downward and then drives the marking block 55 to move downward to mark the template. By switching the two marking blocks 55, the convex and concave marking of the template can be achieved.

[0031] A rubber pad 7 is fixedly provided on one side of the bottom of the glass plate 35 corresponding to the edge of the template. When the template is lifted, the contact position between the template edge and the glass plate 35 is separated by the rubber pad 7, preventing the steel template from damaging the glass plate 35.

[0032] In summary, after the template is conveyed into the light shield 2, the flatness of the template is detected by the interference detection unit 3, and the interference fringes are observed by the CCD camera 32. When the interference fringes are bent, it means that the surface of the template is uneven, and the direction of the bending of the interference fringes can also be used to determine whether the template is convex or concave at that location. If the interference fringes are flat, it means that the template is flat. Then, when the template is conveyed to the marking unit 5, qualified templates are directly conveyed, and unqualified templates are marked at the observed fringe deformation locations. The fringes are as follows: Figure 11-13 shown.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0034] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A bridge steel formwork flatness detection device, comprising a roller conveyor (1), characterized in that: A light shield (2) is fixedly provided in the middle of the roller conveyor (1), an interference detection unit (3) is provided in the light shield (2), a positioning unit (4) and a marking unit (5) are provided on the front and rear sides of the light shield (2), and a pneumatic array ejector unit (6) is provided below the roller conveyor (1), and the pneumatic array ejector unit (6) is provided directly below the light shield (2).

2. The bridge steel formwork flatness detection device according to claim 1, characterized in that: The interference detection unit (3) comprises a monochromatic light source (31) and a CCD camera (32) fixedly arranged at the top of the inner side of the light shield (2); fixed rods (33) are fixedly arranged on both the front and rear sides of the light shield (2); the bottom end of one of the fixed rods (33) is rotatably connected to an electric push rod (34); a glass plate (35) is further arranged in the light shield (2); the glass plate (35) is arranged in an inclined shape in the light shield (2); the front and rear sides of the glass plate (35) are rotatably connected to the end of the electric push rod (34) and the bottom end of the fixed rod (33) away from the electric push rod (34), respectively.

3. The bridge steel formwork flatness detection device according to claim 2, characterized in that: The monochromatic light source (31) comprises a substrate (311) and a plurality of monochromatic light-emitting units (312), wherein the plurality of monochromatic light-emitting units (312) are distributed in an array on a supporting surface of the substrate (311), and the CCD camera (32) is arranged in the middle of the substrate (311).

4. The bridge steel formwork flatness detection device according to claim 2, characterized in that: The angle between the glass plate (35) and the steel template is 0.8°-1.5°.

5. The bridge steel formwork flatness detection device according to claim 1, characterized in that: The pneumatic array ejector unit (6) comprises a fixed frame (61) fixedly arranged at the bottom of the roller conveyor (1), a plurality of ejector cylinders (62) are arranged on the fixed frame (61), and ejector pins (63) are arranged at the output ends of the ejector cylinders (62).

6. The bridge steel formwork flatness detection device according to claim 1, characterized in that: The alignment unit (4) comprises two alignment cylinders (41) respectively fixedly arranged on both sides of the roller conveyor (1), the two alignment cylinders (41) are symmetrically arranged relative to the roller conveyor (1), and the output ends of the two alignment cylinders (41) are both provided with an alignment plate (42), and the alignment plate (42) is L-shaped.

7. The bridge steel formwork flatness detection device according to claim 6, characterized in that: A plurality of rollers are rotatably provided on the surface of the alignment plate (42), and a guide plate (43) is fixedly provided on the side of the alignment plate (42) away from the conveying direction of the roller conveyor (1).

8. The bridge steel formwork flatness detection device according to claim 1, characterized in that: The marking unit (5) comprises a track (51) arranged above the roller conveyor (1), a slider (52) is arranged in the track (51), the slider (52) is driven by a screw transmission system, a support (53) is fixedly arranged on the slider (52), a marking cylinder (54) is arranged on the support (53), the output end of the marking cylinder (54) passes through the support (53) and two marking blocks (55) are arranged at the end, the two marking blocks (55) are made of sponge material and are soaked in pigment, and the pigments in the two marking blocks (55) are different in color.

9. The bridge steel formwork flatness detection device according to claim 8, characterized in that: The output end of the marking cylinder (54) is provided with a slide rail (56), a switching block (57) is slidably provided in the slide rail (56), a switching cylinder (58) is provided on one side of the slide rail (56), the output end of the switching cylinder (58) is connected to the switching block (57), a slot (59) is provided on the switching block (57) at the position corresponding to the two marking blocks (55), and vertical rods (510) are slidably provided in the two slots (59), the marking block (55) is fixedly provided at the bottom end of the vertical rod (510), a magnetic plate 1 (511) is provided at the top end of the vertical rod (510), a magnetic plate 2 (512) is provided in the middle of the slide rail (56), the magnetic plate 1 (511) and the magnetic plate 2 (512) repel each other, and a return spring (513) is provided on the outside of the vertical rod (510), and the two ends of the return spring (513) are respectively connected to the magnetic plate 1 (511) and the bottom of the slot (59).

10. The bridge steel formwork flatness detection device according to claim 2, characterized in that: A rubber pad (7) is fixedly provided on one side of the bottom of the glass plate (35) at a position corresponding to the edge of the template.

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