Steel structure fireproof coating thickness measuring device and measuring method

Abstract

The invention discloses a device and a method for measuring the thickness of a fireproof coating of a steel structure. The measuring device comprises a scale ruler, a measuring head, a movable needle, a leveling block and a positioning structure, the measuring head is arranged outside the graduated ruler in a sliding mode, the leveling block is fixedly connected to the end portion of the graduated ruler, a penetrating hole communicated with an inner cavity of the graduated ruler is formed in the leveling block, the non-tip end of the movable needle is fixedly connected with the measuring head, and the tip end of the movable needle is arranged in the penetrating hole of the leveling block in a telescopic mode. When the measuring head is aligned with the 0 scale line of the scale ruler, the tip end of the movable needle is flush with the outer side surface of the leveling block; the positioning structure is fixedly connected with the leveling block so as to enable the leveling block to be tightly attached and fixed to the surface of the side, where the thickness of the fireproof coating is to be measured, of the steel structure. Mechanical errors and measurement interference are eliminated to a great extent through a positioning mechanism, the stability of the device is ensured by combining a spiral clamping assembly and a locking assembly, and the accuracy of measurement data is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a device and method for measuring the thickness of fire retardant coating for steel structures. Background Art

[0002] Steel structures are widely used in modern architecture due to their high strength, light weight, and excellent seismic resistance. The thickness of their fire-retardant coating directly affects their fire resistance, necessitating precise measurement. Existing thickness measuring devices, such as ultrasonic, magnetic, and eddy current devices, have significant drawbacks: large devices are difficult to carry during aerial operations, loose surface adhesion leads to errors, and calibration is cumbersome and prone to displacement, compromising measurement efficiency and accuracy. The present invention provides a device and method for measuring the thickness of fire-retardant coatings on steel structures to address these shortcomings. Summary of the Invention

[0003] In response to the above-mentioned problems, the present invention discloses a steel structure fire retardant coating thickness measuring device and a measuring method to overcome the problem that the existing steel structure fire retardant coating thickness measuring device is prone to deviation during measurement, resulting in large measurement errors.

[0004] In one aspect, the present invention provides a device for measuring the thickness of fire retardant coatings for steel structures, comprising a scale, a measuring head, a movable needle, a leveling block, and a positioning structure;

[0005] The measuring head is slidably arranged on the outside of the scale ruler, the leveling block is fixedly connected to the end of the scale ruler, the scale ruler is a hollow cylinder, the interior of the leveling block is provided with a through hole connected to the inner cavity of the scale ruler, the non-tip end of the movable needle is fixedly connected to the measuring head, the tip of the movable needle is retractably arranged in the through hole of the leveling block, and when the measuring head is aligned with the 0 scale line of the scale ruler, the tip of the movable needle is flush with the outer side surface of the leveling block;

[0006] The positioning structure is fixedly connected to the leveling block so as to fix the leveling block tightly on the side surface of the steel structure where the thickness of the fire retardant coating is to be measured.

[0007] In some embodiments, a slide groove communicating with the inner cavity of the scale ruler is provided on the bottom side of the scale ruler, a slider that can slide along the slide groove and extend into the inner cavity of the scale ruler is provided on the measuring head, and the non-tip end of the movable needle is fixedly connected to the slider.

[0008] In some embodiments, the positioning mechanism includes two connecting plates 1, the two connecting plates 1 are respectively fixed on both sides of the flat block, and the outer side of each connecting plate 1 is vertically connected to a connecting plate 2, and the two connecting plates 2 are respectively provided with a clamping assembly on one side opposite to the other.

[0009] The clamping assembly includes a splint, and a multi-stage telescopic slide rod and a threaded telescopic structure are connected between the splint and the second connecting plate. The threaded telescopic structure includes a threaded sleeve fixed on the splint and a stud rotatably connected to the second connecting plate. One end of the stud is threadedly connected to the threaded sleeve, and the other end of the stud is fixedly connected to a handle.

[0010] In some embodiments, the first connecting plate and the second connecting plate are both T-shaped plates;

[0011] The middle plate of the connecting plate 1 is fixed to the outer side of the flat block, the top plate of the connecting plate 1 is arranged parallel to the top plate of the connecting plate 2, and the length of the top plate of the connecting plate 1 is less than the length of the top plate of the connecting plate 2, the connecting plate 1 is connected to the connecting plate 2 through a spring telescopic rod, and a locking assembly is further provided between the connecting plate 2 and the connecting plate 1;

[0012] The locking assembly includes two rotating rods and two locking pins, the two locking pins are respectively threadedly connected to the outer sides of the two ends of the top plate of the connecting plate one, one end of the two rotating rods are respectively rotatably connected to the outer sides of the two ends of the top plate of the connecting plate two, and each of the rotating rods is provided with a strip hole, the rotating rod is sleeved on the locking pin through the strip hole, and the top plate of the connecting plate one, the two rotating rods and the top plate of the connecting plate two form a trapezoidal structure.

[0013] In some embodiments, a connecting plate three is fixedly provided on the inner middle portion of the connecting plate two, and both ends of the spring telescopic rod are respectively vertically fixed on the connecting plate three and the middle plate of the connecting plate one.

[0014] In some embodiments, the device further includes an electric telescopic rod for pushing and pulling the measuring head, wherein the telescopic end of the electric telescopic rod is connected to the top of the measuring head, and the non-telescopic end of the electric telescopic rod is fixed to the end of the scale away from the leveling block.

[0015] In some embodiments, the device further comprises a liftable support rod, wherein the liftable support rod is located below an end of the scale ruler away from the leveling block, the top plate of the liftable support rod is provided with a U-shaped support plate, and the scale ruler is detachably connected to the U-shaped support plate.

[0016] In some embodiments, the liftable support rod is a multi-stage telescopic support rod, and upper and lower adjacent support rods in the multi-stage telescopic support rod are fixedly connected by means of a card bead and a card slot.

[0017] On the other hand, the present invention discloses a method for measuring the thickness of a fire retardant coating for a steel structure. Based on the above-mentioned device for measuring the thickness of a fire retardant coating for a steel structure, the method comprises the following steps:

[0018] Align the measuring head with the 0 scale line of the scale ruler;

[0019] Using a positioning structure, the flattening block is fixed tightly to the surface of one side of the steel structure where the thickness of the fire retardant coating is to be measured;

[0020] The measuring head is pushed so as to move toward the flat block until the movable needle penetrates the coating to the bottom, and the measurement data on the scale is obtained.

[0021] Compared with the prior art, the above invention has at least one of the following advantages or beneficial effects:

[0022] This invention discloses a device and method for measuring the thickness of fire-retardant coatings on steel structures. This device utilizes a positioning mechanism to largely eliminate mechanical errors and measurement interference. The combination of a screw clamp and locking assembly ensures device stability and improves measurement accuracy. The device supports both manual and electric measurement and features a retractable support rod for high-altitude operation, eliminating the need for additional climbing equipment. This reduces operational risks and expands applicable scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention and its features, configurations, and advantages will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not necessarily drawn to scale, emphasis being placed on illustrating the subject matter of the present invention.

[0024] Figure 1 This is a schematic diagram of an application angle of a device for measuring the thickness of fire retardant coatings for steel structures according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of another angle of application of the device for measuring the thickness of fire retardant coating for steel structures according to an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of the structure of a device for measuring the thickness of fire retardant coating for steel structures according to an embodiment of the present invention;

[0027] Figure 4 for Figure 1 A magnified schematic diagram of point A in the middle;

[0028] Among them, 1. ruler; 2. measuring head; 3. movable needle; 4. leveling block; 5. connecting plate 1; 6. spring telescopic rod; 7. connecting plate 2; 8. multi-stage telescopic slide rod; 9. stud; 10. handle; 11. splint; 12. threaded sleeve; 13. rotating rod; 14. strip hole; 15. locking pin; 16. electric telescopic rod; 17. liftable support rod; 18. card bead; 19. U-shaped support plate. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0030] like Figures 1 to 4 As shown, this embodiment discloses a device for measuring the thickness of fire retardant coating for steel structure. Specifically, the device includes a scale 1, a measuring head 2, a movable needle 3, a leveling block 4 and a positioning structure; the measuring head 2 is sleeved on the outside of the scale 1 and can slide along the length direction of the scale 1, the leveling block 4 is fixedly connected to the end of the scale 1, the scale 1 is a hollow cylinder, and the interior of the leveling block 4 is penetrated by a through hole connected to the inner cavity of the scale 1, the non-tip end of the movable needle 3 is fixedly connected to the measuring head 2, and the tip of the movable needle 3 is telescopically arranged in the through hole of the leveling block 4, and when the measuring head 2 is aligned with the 0 scale line of the scale 1, the tip of the movable needle 3 is flush with the outer side surface of the leveling block 4; the positioning structure is fixedly connected to the leveling block 4 for fixing the leveling block 4 tightly on the side surface of the steel structure whose fire retardant coating thickness is to be measured. A slide groove communicating with the inner cavity of the scale 1 is provided on the bottom side of the scale 1, and a slider that can slide along the slide groove and extend into the inner cavity of the scale 1 is provided on the measuring head 2. The non-tip end of the movable needle 3 is fixedly connected to the slider so that when the measuring head 2 drives the slider to slide along the length direction of the scale 1 toward the leveling block 4, the tip end of the movable needle 3 is driven to extend out of the leveling block 4 and move forward.

[0031] The above-mentioned positioning mechanism includes two connecting plates 5, which are respectively fixed on both sides of the flat block 4, and the outer side of each connecting plate 5 is vertically connected to a connecting plate 2 7, and a clamping assembly is provided on the opposite side of the two connecting plates 2 7; the clamping assembly includes a splint 11, and a multi-stage telescopic slide rod 8 and a threaded telescopic structure are connected between the splint 11 and the connecting plate 2 7, and the threaded telescopic structure includes a threaded sleeve 12 fixed on the splint 11 and a stud 9 rotatably connected to the connecting plate 2 7, one end of the stud 9 is threadedly connected in the threaded sleeve 12, and the other end of the stud 9 is fixedly connected to a handle 10, and the handle 10 is located on the side of the connecting plate 2 7 away from the splint 11. Specifically, the connecting plate 1 5 and the connecting plate 2 7 are both T-shaped plates; the middle plate of the connecting plate 1 5 is fixed to the outside of the flat block, the top plate of the connecting plate 1 5 is arranged parallel to the top plate of the connecting plate 2 7, and the center of the top plate of the connecting plate 1 5 corresponds to the center of the top plate of the connecting plate 2 7. The length of the top plate of the connecting plate 1 5 is smaller than the length of the top plate of the connecting plate 2 7. The connecting plate 1 5 is connected to the connecting plate 2 7 through a spring telescopic rod 6, and a locking assembly is also provided between the connecting plate 2 7 and the connecting plate 1 5. The locking assembly includes two rotating rods 13 and two locking pins 15. The two locking pins 15 are respectively threadedly connected to the outer sides of the two ends of the top plate of the connecting plate 1 5. One end of the two rotating rods 13 is respectively rotatably connected to the outer sides of the two ends of the top plate of the connecting plate 2 7. A strip hole 14 is opened on each rotating rod 13. Each rotating rod 13 is sleeved on the locking pin 15 through the strip hole 14 thereon. The top plate of the connecting plate 1 5, the two rotating rods 13 and the top plate of the connecting plate 2 7 form a trapezoidal structure. When the locking pin 15 is tightened, the position of the rotating rod 13 is fixed. When the locking pin 15 is loosened, the rotating rod 13 can be It can move through the strip hole 14; a connecting plate three is fixedly provided on the inner middle part of the connecting plate two 7, and the two ends of the spring telescopic rod 6 are respectively fixed vertically on the connecting plate three and the middle plate of the connecting plate one 5; when the flat block needs to be fixed tightly to the steel structure, the position of the locking pin 15 locking the rotating rod 13 can be adjusted according to the shape and size of the steel structure to flexibly adjust the distance between the clamping assembly and the flat block. For example, when the steel structure is a cross-shaped steel column or a circular steel column, the clamping assembly can be adjusted to a position capable of clamping the steel structure (for example, the middle position of the side) by adjusting the position of the locking pin 15 locking the rotating rod 13.

[0032] In this embodiment, the measuring device further includes an electric telescopic rod 16 for pushing and pulling the measuring head 2 and a liftable support rod 17 for supporting the scale 1. The telescopic end of the electric telescopic rod 16 is connected to the top of the measuring head 2, and the non-telescopic end of the electric telescopic rod 16 is fixed to the end of the scale 1 away from the leveling block. The liftable support rod 17 is located below the end of the scale 1 away from the leveling block. The top plate of the liftable support rod is provided with a U-shaped support plate 19, and the scale 1 is detachably connected to the U-shaped support plate 19. Preferably, the liftable support rod 17 is a multi-stage telescopic support rod, and the upper and lower adjacent support rods in the multi-stage telescopic support rod are fixedly connected by a card bead 18 and a card slot, similar to the umbrella pole of a folding umbrella, so that the height of the upgradeable support rod can be flexibly adjusted.

[0033] Example 2:

[0034] This embodiment discloses a method for measuring the thickness of a fire retardant coating on a steel structure. Based on the device for measuring the thickness of a fire retardant coating on a steel structure in the first embodiment, the method includes the following steps:

[0035] Align the measuring head with the 0 scale line on the scale and return the measuring head to zero.

[0036] Use the positioning structure to fix the leveling block tightly on the surface of one side of the steel structure where the thickness of the fire retardant coating is to be measured; specifically, first lift the above-mentioned liftable support rod to the measuring height, then place the leveling block close to the surface of the steel structure to be measured, then turn the handle to clamp the two clamps on both sides of the steel structure, and tighten the locking pin to lock the distance between the clamps and the leveling block.

[0037] Push the measuring head or start the electric telescopic rod to move the measuring head along the scale toward the flat block until the movable needle pierces the coating to the bottom, and obtain the measurement data on the scale. The measurement data is the thickness of the steel structure fire retardant coating.

[0038] Those skilled in the art should understand that they can implement variations by combining the prior art with the above embodiments, which will not be described in detail here. Such variations do not affect the essence of the present invention and will not be described in detail here.

[0039] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-mentioned disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A device for measuring the thickness of fire retardant coating for steel structures, characterized in that: It includes a scale, a measuring head, a movable needle, a leveling block and a positioning structure; The measuring head is slidably arranged on the outside of the scale ruler, the leveling block is fixedly connected to the end of the scale ruler, the scale ruler is a hollow cylinder, the interior of the leveling block is provided with a through hole connected to the inner cavity of the scale ruler, the non-tip end of the movable needle is fixedly connected to the measuring head, the tip of the movable needle is retractably arranged in the through hole of the leveling block, and when the measuring head is aligned with the 0 scale line of the scale ruler, the tip of the movable needle is flush with the outer side surface of the leveling block; The positioning structure is fixedly connected to the leveling block so as to fix the leveling block tightly on the side surface of the steel structure where the thickness of the fire retardant coating is to be measured.

2. The device for measuring the thickness of fire retardant coating for steel structure according to claim 1, characterized in that: A slide groove communicating with the inner cavity of the scale is provided on the bottom side of the scale, and a slider that can slide along the slide groove and extend into the inner cavity of the scale is provided on the measuring head, and the non-tip end of the movable needle is fixedly connected to the slider.

3. The device for measuring the thickness of fire retardant coating for steel structure according to claim 1, characterized in that: The positioning mechanism includes two connecting plates 1, the two connecting plates 1 are respectively fixed on both sides of the flat block, and the outer side of each connecting plate 1 is vertically connected to a connecting plate 2, and the two connecting plates 2 are respectively provided with a clamping assembly on one side opposite to each other; The clamping assembly includes a splint, and a multi-stage telescopic slide rod and a threaded telescopic structure are connected between the splint and the second connecting plate. The threaded telescopic structure includes a threaded sleeve fixed on the splint and a stud rotatably connected to the second connecting plate. One end of the stud is threadedly connected to the threaded sleeve, and the other end of the stud is fixedly connected to a handle.

4. The device for measuring the thickness of fire retardant coating for steel structure according to claim 3, characterized in that: The first connecting plate and the second connecting plate are both T-shaped plates; The middle plate of the connecting plate 1 is fixed to the outer side of the flat block, the top plate of the connecting plate 1 is arranged parallel to the top plate of the connecting plate 2, and the length of the top plate of the connecting plate 1 is less than the length of the top plate of the connecting plate 2, the connecting plate 1 is connected to the connecting plate 2 through a spring telescopic rod, and a locking assembly is further provided between the connecting plate 2 and the connecting plate 1; The locking assembly includes two rotating rods and two locking pins, the two locking pins are respectively threadedly connected to the outer sides of the two ends of the top plate of the connecting plate one, one end of the two rotating rods are respectively rotatably connected to the outer sides of the two ends of the top plate of the connecting plate two, and each of the rotating rods is provided with a strip hole, the rotating rod is sleeved on the locking pin through the strip hole, and the top plate of the connecting plate one, the two rotating rods and the top plate of the connecting plate two form a trapezoidal structure.

5. The device for measuring the thickness of fire retardant coating for steel structure according to claim 4, characterized in that: A connecting plate three is fixedly provided on the inner middle part of the connecting plate two, and two ends of the spring telescopic rod are respectively vertically fixed on the connecting plate three and the middle plate of the connecting plate one.

6. The device for measuring the thickness of fire retardant coating for steel structure according to claim 1, characterized in that: The device also includes an electric telescopic rod for pushing and pulling the measuring head, wherein the telescopic end of the electric telescopic rod is connected to the top of the measuring head, and the non-telescopic end of the electric telescopic rod is fixed to the end of the scale away from the leveling block.

7. The device for measuring thickness of fire retardant coating for steel structure according to claim 1, characterized in that: The device also includes a liftable support rod, which is located below the end of the scale ruler away from the leveling block. The top plate of the liftable support rod is provided with a U-shaped support plate, and the scale ruler is detachably connected to the U-shaped support plate.

8. The device for measuring thickness of fire retardant coating for steel structure according to claim 7, characterized in that: The liftable support rod is a multi-stage telescopic support rod, and the upper and lower adjacent support rods in the multi-stage telescopic support rod are fixedly connected by clamping beads and clamping grooves.

9. A method for measuring the thickness of fire retardant coating on steel structure, characterized in that: Based on the steel structure fire retardant coating thickness measuring device according to any one of claims 1 to 8, the measuring method comprises the following steps: Align the measuring head with the 0 scale line of the scale ruler; Using a positioning structure, the flattening block is fixed tightly to the surface of one side of the steel structure where the thickness of the fire retardant coating is to be measured; The measuring head is pushed so as to move toward the flat block until the movable needle penetrates the coating to the bottom, and the measurement data on the scale is obtained.

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