Device for measuring thickness of fireproof coating on outer wall of building
By designing a device comprising a cylindrical shell, a test needle assembly, and a clamp, the test needle is driven by mechanical force to penetrate the fire-retardant coating, solving the problems of time-consuming, labor-intensive, and easily misaligned measurements in existing technologies, and achieving efficient and accurate measurement of fire-retardant coating thickness.
Patent Information
- Application Number
- CN202520154177.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-01-23
AI Technical Summary
In the existing technology, the method for measuring the thickness of fire-retardant coatings is time-consuming and laborious, and is prone to causing the measuring instrument to deviate, resulting in inaccurate test data.
A device comprising a cylindrical shell, a test probe assembly, and a clamp is designed. Utilizing the limiting effect of a first spring and the clamp, the test probe is driven by mechanical force to penetrate the fire-retardant coating. Combined with a disc pointer to read the thickness data, the accuracy of the measurement is ensured.
It enables efficient and accurate measurement of fire-retardant coating thickness, reduces errors caused by manual force, and ensures the accuracy of measurement data.
Smart Images
Figure CN223940161U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thickness measuring device technology, and in particular to a device for measuring the thickness of fireproof coating on the exterior wall of a building. Background Technology
[0002] In modern society, with the maturity of steel structure construction technology, combined with its advantages such as high material strength, lightweight components, rapid construction, high flexibility, and good seismic resistance, steel structures are widely used in large public facilities such as steel structure factories, high-speed railway stations, and stadiums. The biggest weakness of steel structure factories is their fire resistance. To improve protection, fire-retardant coatings are usually applied to the exterior walls of steel structure buildings. Therefore, it is necessary to measure the thickness of the fire-retardant coating to confirm whether the building meets fire safety requirements. Traditional methods for measuring fire-retardant coatings mainly rely on the measuring personnel leaning forward to penetrate the solidified fire-retardant coating with a probe. This is not only time-consuming and laborious, but also inefficient. Furthermore, the measuring instrument is prone to deviation during the exertion of force, leading to inaccurate test data. Utility Model Content
[0003] To overcome the shortcomings of existing thickness monitoring methods that rely on the human body leaning forward to exert force, which are not only time-consuming and laborious with low measurement efficiency, but also prone to causing the measuring instrument to deviate during the force exertion process, resulting in inaccurate test data, this utility model provides a device for measuring the thickness of fireproof coatings on the exterior walls of buildings.
[0004] This invention provides a device for measuring the thickness of fire-retardant coating on the exterior wall of a building, comprising a cylindrical shell, a test needle assembly, and a clamp. An elongated hole is formed along the length of the cylindrical shell. The test needle assembly is located within the cylindrical shell. From front to rear, the test needle assembly consists of a coaxial and fixedly connected fixed shaft, a hammer, and a test needle. A striking hammer and a first spring are sequentially threaded onto the fixed shaft near the hammer. A pull rod is fixedly connected to the striking hammer, extending through the elongated hole in the cylindrical shell. A circular pointer is fixedly connected to the test needle, which is positioned on the axis of the pointer. A measuring scale is also provided at the elongated hole in the cylindrical shell. A rear cover is detachably connected to the rear end of the cylindrical shell, and the rear cover has a through hole for avoiding the fixed shaft. The clamping device includes a frustum-shaped cylindrical shell and a pair of symmetrically arranged pawls. The large end of the frustum-shaped cylindrical shell is fixedly connected to the front end of the cylindrical shell, and their axes are collinear. Two mounting slots are symmetrically opened on the side wall of the frustum-shaped cylindrical shell. The mounting slots are arranged from the rear end to the front end of the frustum-shaped cylindrical shell. The two pawls are installed into the two mounting slots by a fixing pin, which is located in the middle of the pawls. A second spring is fixedly connected to the inner side of the rear end of the pawls. The axis of the second spring is perpendicular to the axis of the frustum-shaped cylindrical shell. The free end of the second spring is fixedly connected to the wall of the corresponding mounting slot. The test needle is provided with one-way ratchet along its length. When the test needle moves upward, the front end of the pawl limits the one-way ratchet on the test needle.
[0005] Before use, first place the small end of the frustum-shaped cylindrical shell, which is the front end of the entire device, against a horizontal plane. When the front end of the test needle is just at the horizontal plane, the pointer on the test needle's disc is exactly at the zero mark of the measuring scale. The test needle remains stationary under the limiting action of the clamp. During use, place the entire device in a horizontal position, and use the pull rod to move the striking hammer along the fixed axis to the rear end of the cylindrical shell. The first spring is compressed between the striking hammer and the rear cover. When the pull rod is released, the striking hammer moves forward along the fixed axis under the elastic force of the first spring. The impact force of the striking hammer acts directly on the load-bearing hammer, which drives the test needle and the fixed axis to move forward as a whole. The test needle passes through the two pawls of the clamp and penetrates into the fire-retardant coating. By reading the degree at the position of the disc pointer, the thickness of the fire-retardant coating can be determined. Under normal circumstances, repeat the measurement two or three times in a certain area of the building, and calculate the average value to obtain a relatively accurate fire-retardant coating thickness. After the test is completed, pressing the second spring at the rear end of the two pawls inward causes the pawls to rotate around the fixed pin. The front end of the pawl releases the test probe, allowing it to move backward and retract into the device. The limiting engagement between the pawls and the ratchet teeth on the test probe ensures the accuracy of the test probe's measurement data.
[0006] Preferably, the outer diameters of the striking hammer, the load-bearing hammer, and the disc pointer are slightly smaller than the inner diameter of the cylindrical shell, while the outer diameters of the striking hammer, the load-bearing hammer, and the disc pointer are larger than the inner diameter of the large end of the frustum-shaped cylindrical shell. This arrangement ensures that the range of motion of the first spring, the striking hammer, the load-bearing hammer, and the disc pointer is limited to the interior of the cylindrical shell. The cylindrical shell provides a stable operating space for the test probe assembly, ensuring normal overall operation, and the structure is very reasonable.
[0007] The technical solution provided by this utility model has the following technical advantages compared with the prior art:
[0008] This invention, by setting a first spring, can effectively avoid errors caused by manual force during measurement posture and force application. The clamping device can ensure that the test probe will not rebound during the detection process, thus ensuring accurate measurement of coating thickness. Attached Figure Description
[0009] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.
[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0011] Figure 1 This is a schematic diagram of the overall structure of a device for measuring the thickness of fireproof coating on the exterior wall of a building, as described in a certain embodiment of the present invention.
[0012] Figure 2 This is a schematic diagram of the structure of the test probe assembly in a certain embodiment of the present invention;
[0013] Figure 3 This is a schematic diagram of the clamping device in a certain embodiment of the present invention;
[0014] Figure 4 This is an enlarged schematic diagram showing the combination of the disc pointer and the measuring scale in a certain embodiment of the present invention.
[0015] In the diagram: 1. Cylindrical outer shell; 2. Oblong hole; 3. Fixed shaft; 4. Forced hammer; 5. Test probe; 6. Striking hammer; 7. First spring; 8. Pull rod; 9. Circular pointer; 10. Measuring scale; 11. Back cover; 12. Through hole; 13. Frustum-shaped cylindrical outer shell; 14. Pawl; 15. Mounting groove; 16. Fixed pin; 17. Second spring. Detailed Implementation
[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.
[0017] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.
[0019] The following is in conjunction with the appendix Figures 1 to 4 The specific embodiments of this utility model will be described in detail below.
[0020] In one embodiment, such as Figure 1As shown, a device for measuring the thickness of fire-retardant coating on the exterior wall of a building is disclosed, comprising a cylindrical shell 1, a test needle assembly, and a clamping device. The cylindrical shell 1 has an elongated hole 2 along its length. The test needle assembly is located within the cylindrical shell 1. From front to rear, the test needle assembly is sequentially provided with a coaxial and fixedly connected fixed shaft 3, a hammer 4, and a test needle 5. A striking hammer 6 and a first spring 7 are sequentially inserted through the fixed shaft 3 near the hammer 4. A pull rod 8 is fixedly connected to the striking hammer 6, extending out of the elongated hole 2 of the cylindrical shell 1. A disc pointer 9 is fixedly connected to the test needle 5, and the test needle 5 is located on the axis of the disc pointer 9. A measuring scale 10 is also provided at the elongated hole 2 of the cylindrical shell 1. A rear cover 11 is detachably connected to the rear end of the cylindrical shell 1, and the rear cover 11 has a through hole 12 for avoiding the fixed shaft 3. The clamping device includes… The truncated cylindrical shell 13 and a pair of symmetrically arranged pawls 14 are provided. The large end of the truncated cylindrical shell 13 is fixedly connected to the front end of the cylindrical shell 1, and the axes of the two are collinear. Two mounting slots 15 are symmetrically opened on the side wall of the truncated cylindrical shell 13. The mounting slots 15 are arranged from the rear end to the front end of the truncated cylindrical shell 13. The two pawls 14 are installed into the two mounting slots 15 by fixing pins 16. The fixing pins 16 are located in the middle position of the pawls 14. A second spring 17 is fixedly connected to the inner rear end of the pawls 14. The axis of the second spring 17 is perpendicular to the axis of the truncated cylindrical shell 13. The free end of the second spring 17 is fixedly connected to the wall of the corresponding mounting slot 15. The test needle 5 is provided with one-way ratchet along its length. When the test needle 5 moves upward, the front end of the pawl 14 limits the one-way ratchet on the test needle 5.
[0021] Before use, first place the small end of the frustum-shaped cylindrical shell 13, which is the front end of the entire device, against a horizontal plane. When the front end of the test needle 5 is just at the horizontal plane, the disc pointer 9 on the test needle 5 is just at the zero mark of the measuring scale 10. The test needle 5 remains stationary under the limiting action of the clamp. During use, place the entire device in a horizontal position, and use the pull rod 8 to push the striking hammer 6 along the fixed shaft 3 towards the rear end of the cylindrical shell 1. The first spring 7 is compressed between the striking hammer 6 and the rear cover 11. When the pull rod 8 is released, the striking hammer 6 moves forward along the fixed shaft 3 under the elastic force of the first spring 7. The impact force of the striking hammer 6 acts directly on the load hammer 4, which drives the test needle 5 and the fixed shaft 3 to move forward as a whole. The test needle 5 passes through the two pawls 14 of the clamp and enters the fireproof coating. By reading the degree at the position of the disc pointer 9, the thickness of the fireproof coating can be determined. Typically, the fire-retardant coating thickness is obtained by repeating the measurement two to three times within a certain area of the building and calculating the average value. After the test is completed, the second spring 17 at the rear end of the two pawls 14 is pressed inward. The pawls 14 rotate around the fixed pin 16, and the front end of the pawls 14 releases the test needle 5, allowing the test needle 5 to move backward and retract into the device. The limiting engagement between the pawls 14 and the ratchet teeth on the test needle 5 ensures the accuracy of the measurement data.
[0022] Based on the above embodiments, in a preferred embodiment, the outer diameters of the striking hammer 6, the force-receiving hammer 4, and the disc pointer 9 are slightly smaller than the inner diameter of the cylindrical outer shell 1, while the outer diameters of the striking hammer 6, the force-receiving hammer 4, and the disc pointer 9 are larger than the inner diameter of the large end of the frustum-shaped cylindrical outer shell 13. This arrangement ensures that the range of motion of the first spring 7, the striking hammer 6, the force-receiving hammer 4, and the disc pointer 9 is limited to the interior of the cylindrical outer shell 1. The cylindrical outer shell 1 provides a stable operating space for the test probe assembly, ensuring normal overall operation, and the structure is very reasonable.
[0023] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.
Claims
1. A device for measuring the thickness of fire-retardant coating on the exterior wall of a building, characterized in that, The device includes a cylindrical outer shell (1), a test probe assembly, and a clamp. An elongated hole (2) is formed along the length of the cylindrical outer shell (1). The test probe assembly is located within the cylindrical outer shell (1). From front to rear, the test probe assembly is sequentially provided with a coaxial and fixedly connected fixed shaft (3), a hammer (4), and a test probe (5). A striking hammer (6) and a first spring (7) are sequentially threaded through the fixed shaft (3) near the hammer (4). A pull rod is fixedly connected to the striking hammer (6). 8), the pull rod (8) passes through the elongated hole (2) of the cylindrical shell (1), the test needle (5) is fixedly connected to the disc pointer (9), the test needle (5) is located on the axis of the disc pointer (9), and a measuring scale (10) is also provided at the elongated hole (2) of the cylindrical shell (1); the rear end of the cylindrical shell (1) is detachably connected to the rear cover (11), and the rear cover (11) has a through hole (12) for avoiding the fixed shaft (3); the clamping device includes a frustum-shaped cylindrical shell (1 3) and a pair of symmetrically arranged pawls (14), the large end of the frustum-shaped cylindrical shell (13) is fixedly connected to the front end of the cylindrical shell (1) and the axes of the two are collinear, two mounting slots (15) are symmetrically opened on the side wall of the frustum-shaped cylindrical shell (13), the mounting slots (15) are arranged in the direction from the rear end to the front end of the frustum-shaped cylindrical shell (13), the two pawls (14) are installed into the two mounting slots (15) respectively by fixing pins (16), the fixing pins (16) are located at The second spring (17) is fixedly connected to the inner side of the rear end of the pawl (14) at the middle position. The axis of the second spring (17) is perpendicular to the axis of the frustum-shaped cylindrical shell (13). The free end of the second spring (17) is fixedly connected to the wall of the corresponding mounting groove (15). The test needle (5) is provided with a one-way ratchet along its length. When the test needle (5) moves upward, the front end of the pawl (14) limits the one-way ratchet on the test needle (5).
2. The device for measuring the thickness of fire-retardant coating on the exterior wall of a building according to claim 1, characterized in that, The outer diameter of the striking hammer (6), the force hammer (4), and the disc pointer (9) is slightly smaller than the inner diameter of the cylindrical shell (1), and the outer diameter of the striking hammer (6), the force hammer (4), and the disc pointer (9) is larger than the inner diameter of the large end of the frustum-shaped cylindrical shell (13).