Magnetic adsorption type anti-retraction thermal insulation layer thickness gauge

Abstract

The utility model relates to measuring instrument technical field, and disclose a kind of magnetic adsorption type anti-retraction insulation layer thickness gauge, including measuring fixed frame, I-shaped thickness gauge, degree instrument and anti-retraction limit structure, the bottom plate top of measuring fixed frame is equipped with electromagnet, the guiding column on frame body provides vertical moving passage for thickness gauge;Thickness gauge side is equipped with movable strip, and the other side is equipped with driving gear slot, two sides are equipped with limit slide groove and limit slide block of guiding column cooperation;Anti-retraction limit structure includes the driving gear that engages in driving gear slot, the limit pawl that is engaged with driving gear by torsion spring shaft stem, limit pawl engagement direction is opposite with thickness gauge retraction direction;Degree instrument is equipped with fixed strip, and movable strip cooperation realizes grating type reading.This application structure design is reasonable, convenient operation, and measurement precision is high, can adapt to multiple insulation layer detection scene, effectively satisfy the high-precision requirement of engineering acceptance.

Description

Technical Field

[0001] This utility model relates to the field of measuring instrument technology, specifically a magnetic adsorption type anti-retraction insulation layer thickness measuring needle. Background Technology

[0002] In building construction and insulation project acceptance, the thickness of the insulation layer is a key indicator affecting the insulation effect and structural stability. Therefore, it is necessary to use thickness measuring tools to measure the thickness of the insulation layer. Existing conventional insulation layer thickness gauges are usually used in conjunction with a test base plate. The measurement process is as follows: first, the insulation layer to be tested is placed stably on the test base plate. The operator holds the main body of the thickness gauge and manually ensures that the thickness gauge is in a vertical position. Then, the thickness gauge is manually moved so that the bottom of the thickness gauge touches the top of the insulation layer on the surface of the base plate. Finally, the value on the scale on one side of the thickness gauge is read to obtain the thickness data of the insulation layer. However, these traditional insulation layer thickness gauges lack an effective limiting and anti-retraction structure after being moved to the designated position. Affected by the elastic rebound of the insulation layer material or slight shaking during operation, the thickness gauge is prone to retraction and displacement, resulting in a deviation between the scale reading and the actual insulation layer thickness, which cannot meet the strict requirements for measurement accuracy in engineering testing. Utility Model Content

[0003] This invention provides a magnetic adsorption type anti-retraction insulation layer thickness measuring needle, which solves the problem mentioned in the background art that conventional insulation layer thickness measuring needles do not have an anti-retraction structure, and are prone to retraction and displacement due to the elastic rebound of the material and the shaking caused by manual operation during measurement, resulting in a large deviation between the reading and the actual thickness, which cannot meet the accuracy requirements of engineering testing.

[0004] This utility model provides the following technical solution: A magnetic adsorption type anti-retraction insulation layer thickness measuring needle includes a measuring frame, a thickness measuring needle, and a degree gauge located on the outer wall of the thickness measuring needle. The measuring frame includes a base plate and a frame body located on the base plate. The frame body is provided with a guide post. The guide post has a hollow structure with openings at both ends. An anti-retraction limiting structure is provided inside the guide post. An electromagnet is fixedly connected to the top of the base plate. The electromagnet is connected to an external power supply device through a wire.

[0005] Preferably, the thickness measuring needle is arranged in an I-shape, with the bottom of the thickness measuring needle extending through the guide post to directly above the electromagnet. A movable slat is provided on one outer wall of the thickness measuring needle, and a drive tooth groove is provided on the other outer wall of the thickness measuring needle. Limiting grooves are symmetrically opened on both outer walls of the thickness measuring needle, and a limiting slider is provided on the inner wall of the guide post located in the limiting groove.

[0006] Preferably, the anti-retraction limiting structure includes a drive gear located inside the guide post and meshing with one side of the drive tooth groove. A drive shaft is connected through the drive gear. One end of the drive gear is connected to the inner wall of the guide post through a bearing, and the other end extends through the guide post through a bearing to the outside of the guide post and is connected to a drive cap. The drive gear is provided with a limiting pawl on one side. The drive gear is connected to the inner wall of the guide post by a torsion spring shaft. A limiting groove is opened on the outer wall of the limiting pawl away from the drive gear. A limiting post is detachably connected in the limiting groove. One end of the limiting post is inserted into the inner wall of the guide post. A limiting post operation through groove is opened on the outer wall of the guide post.

[0007] Preferably, the diopters are slidably engaged with the top of the guide post outside the movable strip, the movable strip slides within the diopters following the guide post, and the diopters are provided with fixed strips that match the movable strips.

[0008] Preferably, the top of the electromagnet is a flat adsorption surface. In the initial calibration state, the bottom of the guide post is in close contact with the adsorption surface of the electromagnet, the degree meter displays the zero scale value simultaneously, and the adsorption force of the electromagnet is greater than the weight of the thickness measuring needle itself and the reverse force generated by the rebound of the insulation layer.

[0009] Preferably, the limiting pawl is always engaged with the tooth groove of the drive gear through the torsion spring shaft, and the engagement direction of the limiting pawl is consistent with the downward movement direction of the thickness measuring needle and opposite to the retraction direction of the thickness measuring needle.

[0010] This utility model has the following beneficial effects: 1. This application solves the core defects of traditional thickness gauges through a dual anti-retraction design. On the one hand, the electromagnet at the top of the base plate can generate a stable attraction force during initial calibration and measurement, ensuring that the bottom of the thickness gauge is in close contact with the attraction surface, avoiding retraction displacement caused by insufficient magnetism or external force shaking; on the other hand, in the anti-retraction limiting structure, the limiting pawl is always engaged with the drive gear through the torsion spring shaft, and the engagement direction is opposite to the retraction direction of the thickness gauge, which can effectively block the reverse force generated by the elastic rebound of the insulation layer and prevent the thickness gauge from shifting.

[0011] 2. The measuring instrument adopts a grating reading structure with a combination of moving and fixed gratings. Compared with traditional scale readings, it has higher measurement resolution and smaller error. Combined with the guiding cooperation formed by the limiting grooves on both sides of the thickness measuring needle and the limiting slider on the inner wall of the guide column, it ensures that the thickness measuring needle always moves in the vertical direction, further avoiding measurement deviation caused by tilting. Ultimately, it achieves accurate detection of the insulation layer thickness and meets the strict accuracy requirements of project acceptance.

[0012] 3. This application eliminates the need for operators to manually maintain the thickness gauge in a vertical position. The base plate and frame of the measuring fixture are integrated, and the guide column provides stable vertical guidance, reducing manpower burden and operational difficulty. During the initial calibration stage, the thickness gauge automatically zeros when the bottom of the thickness probe contacts the electromagnet's adsorption surface, eliminating the cumbersome zeroing steps of traditional tools. During measurement, simply rotating the drive cap to drive the drive gear will drive the thickness probe to move smoothly downwards. The entire operation is labor-saving and controllable, and fatigue is not easily generated even after long-term use, greatly improving measurement efficiency. It is especially suitable for batch insulation layer sample testing or rapid sampling inspection scenarios in on-site construction.

[0013] 4. This application integrates functions such as magnetic adsorption positioning, anti-retraction limiting, accurate reading, and stable guidance into one device. It can complete the entire measurement process without additional auxiliary tools. The device has a compact structure, moderate size, and is easy to carry and store, and has broad application prospects and promotional value. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the thickness measuring needle and measuring fixture structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the anti-retraction limiting structure of this utility model.

[0017] Figure 4 For the present utility model Figure 3 Enlarged view of area A in the middle.

[0018] In the diagram: 1. Measuring fixture; 11. Base plate; 111. Electromagnet; 12. Frame; 121. Limiting slider; 13. Guide post; 2. Thickness gauge; 21. Moving bar; 22. Drive tooth groove; 23. Limiting slide groove; 3. Diode; 4. Anti-retraction limiting structure; 41. Drive gear; 42. Drive shaft; 43. Drive cap; 44. Limiting claw; 45. Torsion spring shaft; 46. Limiting groove; 47. Limiting post. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 and Figure 2A magnetic adsorption-type anti-retraction insulation layer thickness gauge 2 includes a measuring frame 1, a thickness gauge 2, and a gloss meter 3 located on the outer wall of the thickness gauge 2. The measuring frame 1 includes a base plate 11 and a frame 12 located on the base plate 11. The integrated structure of the base plate 11 and the frame 12 eliminates the need for operators to manually maintain the device vertically, solving the measurement error problem caused by manual tilting of traditional thickness gauges, reducing labor intensity, and improving operational convenience. The frame 12 is equipped with guide posts 13, which have a hollow structure with open ends, facilitating the vertical movement of the thickness gauge 2 for thickness detection and providing a stable vertical movement channel for the thickness gauge 2. The thickness measuring needle 2 always moves vertically, further ensuring measurement accuracy. The guide column 13 is equipped with an anti-retraction limiting structure 4. An electromagnet 111 is fixedly connected to the top of the base plate 11. The top of the electromagnet 111 is a flat adsorption surface. The electromagnet 111 is connected to an external power supply through a wire. The adsorption force of the electromagnet 111 can be adjusted by the external power supply. The adsorption force is greater than the weight of the thickness measuring needle 2 itself and the reverse force generated by the rebound of the insulation layer. This can not only achieve tight contact of the thickness measuring needle 2 in the initial calibration stage, but also help fix the position of the thickness measuring needle 2 during the measurement process, forming the first line of defense against retraction and avoiding displacement deviation caused by insufficient magnetism or external force.

[0021] The top of the electromagnet 111 is a flat adsorption surface. In the initial calibration state, the bottom of the guide post 13 is in close contact with the adsorption surface of the electromagnet 111. The degree meter 3 displays the zero scale value simultaneously, and the adsorption force of the electromagnet 111 is greater than the weight of the thickness measuring needle 2 and the reverse force generated by the rebound of the insulation layer.

[0022] Please see Figure 1 and Figure 3The thickness gauge 2 is arranged in an I-shape. This I-shape design ensures even force distribution and smooth, uninterrupted movement. Compared to traditional cylindrical thickness gauges, it offers greater structural stability and is less prone to bending or shifting. The bottom of the thickness gauge 2 extends through the guide post 13 to directly above the electromagnet 111. A moving slat 21 is provided on one outer wall of the thickness gauge 2, and a drive tooth groove 22 is provided on the other outer wall. The drive tooth groove 22 provides a precise transmission path for the movement of the thickness gauge 2, working in conjunction with the drive... The moving gear 41 achieves controllable downward movement, avoiding uneven force caused by manual direct pushing. Symmetrical limiting grooves 23 are formed on the outer walls of both sides of the thickness gauge 2. Correspondingly, a limiting slider 121 is provided on the inner wall of the guide post 13. The limiting slider 121 slides and engages within the limiting grooves 23. The sliding cooperation between the limiting grooves 23 and the limiting slider 121 forms a double guiding constraint, further restricting the movement direction of the thickness gauge 2, preventing horizontal deviation, ensuring the verticality of the measurement, reducing component wear, and extending the service life of the device. The measuring instrument 3 slides and engages on the top of the guide post 13 outside the moving strip 21. The moving strip 21 follows the guide post 13 and slides within the measuring instrument 3. The measuring instrument 3 has a fixed strip matching the moving strip 21, providing a structural basis for accurate readings. Compared to traditional scale readings, the measurement resolution is higher. As the moving strip 21 moves with the thickness gauge 2, it slides relative to the fixed strip within the measuring instrument 3 to achieve the reading. In the initial calibration state, the bottom of the thickness gauge 2 is in close contact with the adsorption surface of the electromagnet 111, and the degree meter 3 displays the zero scale value simultaneously (the working principle of the degree meter 3 is a conventional technology and will not be described here).

[0023] Please see Figure 2 - Figure 4 The anti-retraction limiting structure 4 includes a drive gear 41 located inside the guide post 13 and meshing with one side of the drive tooth groove 22. A drive shaft 42 is connected through the drive gear 41. One end of the drive gear 41 is connected to the inner wall of the guide post 13 through a bearing, and the other end extends through the guide post 13 through a bearing to the outside and is connected to a drive cap 43. The meshing transmission structure of the drive gear 41 and the drive tooth groove 22, together with the external drive cap 43, makes the downward movement speed of the thickness measuring needle 2 controllable and the force uniform, avoiding the problem of being too fast or too slow caused by traditional manual pushing, and improving the stability of the measurement process.

[0024] A limiting pawl 44 is provided on one side of the drive gear 41. The drive gear 41 is connected to the inner wall of the guide post 13 by a torsion spring shaft 45. The limiting pawl 44 driven by the torsion spring shaft 45 forms a second anti-retraction defense line. Its meshing direction with the drive gear 41 is precisely adapted to the movement requirements of the thickness measuring needle 2. When the thickness measuring needle 2 moves downward, there is no obstruction. When it retracts, the limiting pawl 44 engages and firmly locks the drive gear 41, preventing the thickness measuring needle 2 from moving. This solves the problem of elastic rebound of the insulation layer. To address measurement deviation issues caused by spring-induced movement, a limiting groove 46 is formed on the outer wall of the limiting pawl 44 on the side away from the drive gear 41, and an operating groove for the limiting post 47 is formed on the outer wall of the guide post 13. The limiting post 47 is detachably connected within the limiting groove 46, with one end of the limiting post 47 inserted into the inner wall of the guide post 13. The detachable limiting post 47 engages with the limiting groove 46, allowing the limiting post 47 to be pulled out according to actual measurement needs, thus resetting the thickness gauge 2 and improving the versatility of the device. The limiting pawl 44 is always engaged with the tooth groove of the drive gear 41 via a torsion spring shaft 45, and the engagement direction of the limiting pawl 44 is consistent with the downward movement direction of the thickness gauge 2 and opposite to the retraction direction of the thickness gauge 2.

[0025] Workflow: Before measurement, connect the external power supply to the electromagnet 111, start the electromagnet 111 and adjust the attraction force; the operator rotates the drive cap 43, which drives the drive gear 41 to rotate. Through the meshing transmission between the drive gear 41 and the drive tooth groove 22, the thickness measuring needle 2 is driven to move vertically downward along the guide column 13 until the bottom of the thickness measuring needle 2 touches the top of the insulation layer. At this time, the bottom of the thickness measuring needle 2 is in close contact with the flat attraction surface of the electromagnet 111, and the measuring instrument 3 automatically displays the zero scale value, completing the initial calibration.

[0026] The insulation layer to be tested is then placed on top of the electromagnet 111. The operator rotates the drive cap 43, causing the drive gear 41 to rotate. Through the meshing transmission between the drive gear 41 and the drive tooth groove 22, the thickness measuring needle 2 is driven to move vertically downward along the guide post 13 until the bottom of the thickness measuring needle 2 abuts against the top of the insulation layer (at this point, the distance between the bottom of the thickness measuring needle 2 and the adsorption surface of the electromagnet 111 is the thickness of the insulation layer). During this process, the limiting claw 44, under the action of the torsion spring shaft 45, remains engaged with the drive gear 41, preventing the thickness measuring needle 2 from retracting due to the springback of the insulation layer; at the same time, the adsorption force of the electromagnet 111 helps to fix the position of the thickness measuring needle 2, forming double protection. Finally, the accurate thickness of the insulation layer can be obtained by reading the value through the thermometer 3.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A magnetic adsorption type anti-retraction insulation layer thickness measuring needle, comprising a measuring fixture (1), a thickness measuring needle (2), and a measuring instrument (3) located on the outer wall of the thickness measuring needle (2), characterized in that: The measuring fixture (1) includes a base plate (11) and a frame (12) located on the base plate (11). The frame (12) is provided with a guide column (13). The guide column (13) has a hollow structure with openings at both ends. The guide column (13) is provided with an anti-retraction limiting structure (4). An electromagnet (111) is fixedly connected to the top of the base plate (11). The electromagnet (111) is connected to an external power supply device through a wire.

2. The magnetic adsorption type anti-retraction insulation layer thickness measuring needle according to claim 1, characterized in that: The thickness measuring needle (2) is arranged in an I-shape. The bottom of the thickness measuring needle (2) extends through the guide post (13) to the top of the electromagnet (111). A moving strip (21) is provided on one side of the outer wall of the thickness measuring needle (2), and a driving tooth groove (22) is provided on the other side of the outer wall of the thickness measuring needle (2). Limiting grooves (23) are symmetrically opened on both sides of the outer wall of the thickness measuring needle (2). A limiting slider (121) is provided on the inner wall of the guide post (13) located in the limiting groove (23).

3. The magnetic adsorption type anti-retraction insulation layer thickness measuring needle according to claim 2, characterized in that: The anti-retraction limiting structure (4) includes a drive gear (41) located inside the guide post (13) and meshing with one side of the drive tooth groove (22). A drive shaft (42) is connected through the drive gear (41). One end of the drive gear (41) is connected to the inner wall of the guide post (13) through a bearing, and the other end extends through the guide post (13) through a bearing to the outside of it and is connected to a drive cap (43). The drive gear (41) is provided with a limiting pawl (44) on one side. The drive gear (41) is connected to the inner wall of the guide post (13) by a torsion spring shaft (45). A limiting groove (46) is opened on the outer wall of the limiting pawl (44) away from the drive gear (41). A limiting post (47) is detachably connected in the limiting groove (46). One end of the limiting post (47) is inserted into the inner wall of the guide post (13). An operating groove for the limiting post (47) is opened on the outer wall of the guide post (13).

4. The magnetic adsorption type anti-retraction insulation layer thickness measuring needle according to claim 2, characterized in that: The degree gauge (3) is slidably engaged with the top of the guide post (13) outside the movable strip (21). The movable strip (21) slides within the degree gauge (3) following the guide post (13). The degree gauge (3) is provided with a fixed strip that matches the movable strip (21).

5. The magnetic adsorption type anti-retraction insulation layer thickness measuring needle according to claim 1, characterized in that: The top of the electromagnet (111) is a flat adsorption surface. In the initial calibration state, the bottom of the guide post (13) is in close contact with the adsorption surface of the electromagnet (111). The degree meter (3) displays the zero scale value simultaneously. The adsorption force of the electromagnet (111) is greater than the weight of the thickness measuring needle (2) and the reverse force generated by the rebound of the insulation layer.

6. A magnetic adsorption type anti-retraction insulation layer thickness measuring needle according to claim 3, characterized in that: The limiting claw (44) is always engaged with the tooth groove of the drive gear (41) through the torsion spring shaft (45), and the engagement direction of the limiting claw (44) is consistent with the downward movement direction of the thickness measuring needle (2) and opposite to the retraction direction of the thickness measuring needle (2).

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