A thickness detection device suitable for railway waterproof and drainage board

Abstract

The application discloses a thickness detection device suitable for railway waterproof and drainage plates and relates to the technical field of thickness detection devices. The device comprises a fixing seat, a micrometer and a supporting seat, and the supporting seat is provided with a smoothing assembly. The smoothing assembly comprises a first threaded rod, a fixing plate, a plurality of positioning blocks, a second threaded rod, a connecting rod and a plurality of moving blocks. The first threaded rod is rotationally connected to the supporting seat, the fixing plate is threadedly connected to the first threaded rod, the plurality of positioning blocks are arranged on the fixing plate, the second threaded rod is rotationally connected to the fixing plate, the connecting rod is threadedly connected to the second threaded rod, and the plurality of moving blocks are arranged on the connecting rod. The positioning blocks and the supporting seat jointly fix the sample, the connecting rod drives the extruding block to move synchronously with the connecting rod through the moving blocks, the sample is smoothed in the moving process of the extruding block, the bending degree of the sample is reduced, and the accuracy of the sample detection result is improved.

Description

Technical Field

[0001] This invention relates to the field of thickness detection device technology, and in particular to a thickness detection device suitable for railway drainage boards. Background Technology

[0002] In railway engineering, drainage boards are a core material for subgrade waterproofing and drainage systems, and their thickness uniformity directly affects the durability and safety of the engineering structure. Currently, industry standards require strict thickness testing of drainage boards to ensure they meet design specifications. However, existing testing technologies have significant shortcomings in practical operation, mainly due to limitations in the physical properties of drainage boards and their manufacturing processes.

[0003] After production, drainage boards are typically stored and transported in roll form. The winding process leads to residual stress and plastic deformation within the material. When a sample is cut from the roll for testing, it is bent or locally warped due to residual stress. If a micrometer is used directly to measure the sample's thickness at this point, the contact point between the measuring probe and the sample surface is easily affected by curvature, leading to the following problems: Measurement accuracy distortion: Uneven pressure distribution between the curved sample surface and the probe, and local depressions or protrusions may be misjudged as thickness deviations; Poor repeatability: Multiple measurements at the same location may cause data fluctuations due to slight deformation of the sample, making it difficult to obtain stable results. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the background art, the present invention provides a thickness detection device suitable for railway drainage boards.

[0005] The technical solution of the present invention is: a thickness detection device suitable for railway waterproofing and drainage boards, comprising a fixed base, wherein the fixed base is provided with a dial indicator and a support base, and the support base is provided with a smoothing component for smoothing the workpiece; The smoothing assembly includes a first threaded rod, a fixed plate, several positioning blocks, a second threaded rod, a connecting rod, and several moving blocks. The first threaded rod is rotatably connected to the support base, and the support base is fixedly connected to a first guide rod. The fixed plate is threadedly connected to the first threaded rod, and the fixed plate is slidably connected to the first guide rod on the support base. Several positioning blocks are disposed on the fixed plate. The second threaded rod is rotatably connected to the fixed plate, and the fixed plate is fixedly connected to a second guide rod. The connecting rod is threadedly connected to the second threaded rod, and the connecting rod is slidably connected to the second guide rod on the fixed plate. Several moving blocks are disposed on the connecting rod.

[0006] Furthermore, the movable block is fixedly connected to a pressing block, and the pressing block has an arc-shaped surface on the side near the support base.

[0007] Furthermore, the extrusion block is made of an elastic, deformable material.

[0008] Furthermore, the connecting rod and the fixing plate are jointly provided with a connecting assembly, which includes a plurality of first fixing shells and a plurality of second fixing shells. The number of first fixing shells is the same as the number of positioning blocks, and the number of second fixing shells is the same as the number of moving blocks. Two adjacent first fixing shells are slidably connected, and the first fixing shells on both sides are fixed to the fixing plate. The positioning blocks are disposed in adjacent first fixing shells, and two adjacent second fixing shells are slidably connected. The second fixing shells on both sides are disposed on the connecting rod, and the moving blocks are disposed in adjacent second fixing shells.

[0009] Furthermore, a first adjusting component is provided inside the first fixed shell. The first adjusting component includes a first tension spring and a first fixing pin. The first fixed shell is slidably connected to the adjacent positioning block. The first tension spring is fixed between the adjacent first fixed shell and the adjacent positioning block to change the position of the adjacent positioning block. The first fixing pin is slidably connected to the adjacent first fixed shell and extends into the adjacent positioning block to limit its movement.

[0010] Furthermore, a second adjusting component is provided inside the second fixed shell. The second adjusting component includes a second tension spring and a second fixing pin. The second fixed shell is slidably connected to the adjacent movable block. The second tension spring is fixed between the adjacent second fixed shell and the adjacent movable block to change the position of the adjacent movable block. The second fixing pin is slidably connected to the adjacent second fixed shell and extends into the adjacent movable block to limit its movement.

[0011] Furthermore, a rotating rod is rotatably connected to the side of the connecting rod near the support base, and the second fixed shells on both sides are fixedly connected to the rotating rod. A limiting block is fixedly connected to the connecting rod, and the limiting block is slidably connected to the rotating rod. The limiting block is used to limit the rotation angle of the rotating rod.

[0012] Furthermore, a damping mechanism is provided between the connecting rod and the rotating rod.

[0013] Furthermore, the minimum distance between the extrusion block and the support base is less than the minimum distance between the adjacent positioning block and the support base, so that the extrusion block contacts the workpiece before the adjacent positioning block.

[0014] Furthermore, the support base is provided with an adjustment component for changing the contact area between the support base and the workpiece. The adjustment component includes a plurality of support blocks, all of which are slidably connected to the support base. A third tension spring is fixed between the support blocks and the support base. The support base is slidably connected with a third fixing pin in a number consistent with the number of support blocks. The third fixing pin extends into the adjacent support block and limits its movement.

[0015] Compared with the prior art, the present invention has the following beneficial effects: After the sample is fixed by the joint action of the positioning block and the support base, the extrusion block moves synchronously with the connecting rod through the transmission of the moving block. During the movement, the extrusion block smooths the sample, making the sample more horizontal and reducing the degree of bending of the sample, thereby improving the accuracy of the sample detection results.

[0016] By making adjacent first fixed shells slide against each other and adjacent second fixed shells slide against each other, all positioning blocks and all moving blocks gradually contact the sample from the center to both sides when they come into contact with the sample, thereby smoothing the sample and improving the flatness of the sample after smoothing.

[0017] By changing the number of positioning blocks and moving blocks that contact the sample, the contact surface between the sample and the two blocks is changed, avoiding contact between the positioning blocks and moving blocks and the sides of the sample. This prevents burrs or warped edges on the sides of the sample from being squeezed, which could cause the sample to curl or fold. This keeps the sample thickness stable and ensures the flatness of the sample, reducing errors that occur during the testing process. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the support base and the first threaded rod of the present invention; Figure 3 This is a three-dimensional structural diagram of the fixing plate and the first fixing shell of the present invention; Figure 4 This is a three-dimensional structural diagram of the first tension spring and the first fixing pin of the present invention; Figure 5 This is a three-dimensional structural cross-sectional view of the positioning block of the present invention; Figure 6 This is a three-dimensional structural cross-sectional view of the first fixing shell of the present invention; Figure 7 This is a three-dimensional structural diagram of the connecting rod and rotating rod of the present invention; Figure 8 This is a three-dimensional structural diagram of the rotating rod and the limiting block of the present invention; Figure 9 This is a three-dimensional structural cross-sectional view of the second fixing shell of the present invention; Figure 10 This is a three-dimensional structural cross-sectional view of the support block of the present invention; Figure 11 This is a three-dimensional structural diagram of the third tension spring and the third fixing pin of the present invention.

[0019] The component names and serial numbers in the diagram are as follows: 1. Fixed base, 2. Dial indicator, 3. Support base, 4. First threaded rod, 5. Fixed plate, 6. Positioning block, 7. Second threaded rod, 8. Connecting rod, 9. Moving block, 10. Pressing block, 11. First fixed shell, 12. Second fixed shell, 13. First tension spring, 16. First fixing pin, 18. Second tension spring, 21. Second fixing pin, 23. Rotating rod, 24. Limiting block, 25. Support block, 26. Third tension spring, 29. Third fixing pin. Detailed Implementation

[0020] The preferred technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Example 1 This embodiment discloses a thickness detection device suitable for railway drainage boards, used to detect the thickness of the drainage boards.

[0022] like Figure 1 As shown, the thickness detection device for railway waterproofing boards includes a fixed base 1, a dial indicator 2 and a support base 3. The dial indicator 2 is located above the support base 3, and the dial indicator 2 and the fixed base 1 are connected by an adjustable bracket (the bracket is an existing device, and the specific position of the dial indicator 2 can be changed by the bracket). The fixed base 1 is equipped with a rotating module for driving the support base 3 to rotate. The figure shows a bevel gear set and a connecting rod as an example. By controlling the rotating module, the relative position of the fixed base 1 and the support base 3 can be changed. The central axis of the probe of the dial indicator 2 coincides with the central axis of the support base 3. The support base 3 is used to place the sample cut from the waterproofing board (the sample is used as an example in this article). The support base 3 is equipped with a smoothing component for smoothing the workpiece. like Figures 1-9As shown, the smoothing component includes a first threaded rod 4, a fixed plate 5, several positioning blocks 6, a second threaded rod 7, a connecting rod 8, and several moving blocks 9. The first threaded rod 4 is rotatably connected to the rear side of the support base 3. A first guide rod is fixedly connected to the front side of the support base 3. The fixed plate 5 is threadedly connected to the first threaded rod 4. The fixed plate 5 is slidably connected to the first guide rod on the support base 3. The first guide rod on the support base 3 is used to guide and limit the fixed plate 5, preventing the fixed plate 5 from rotating synchronously with the first threaded rod 4. By rotating the first threaded rod 4, the fixed plate 5 can move up and down along the first guide rod. Several positioning blocks 6 are all set on the fixed plate 5. The specific number of positioning blocks 6 can be selected by the operator during actual use. In this embodiment, the positioning blocks 6 are directly fixed to the fixed plate 5, and two adjacent positioning blocks 6 are in contact. The lower side of the positioning block 6 is flush with the second threaded rod 7, which is rotatably connected to the rear part of the upper side of the fixing plate 5. The front part of the upper side of the fixing plate 5 is fixedly connected to the second guide rod. The connecting rod 8 is threadedly connected to the second threaded rod 7. The connecting rod 8 is slidably connected to the second guide rod on the fixing plate 5. The second guide rod on the fixing plate 5 is used to guide and limit the connecting rod 8 to prevent the connecting rod 8 from rotating around the second threaded rod 7. Rotating the second threaded rod 7 will allow the connecting rod 8 to move left and right along the second guide rod. Several moving blocks 9 are set on the connecting rod 8. The specific number of moving blocks 9 can be selected by the operator during actual use. The figure shows that the number of moving blocks 9 is the same as the number of positioning blocks 6. In actual use, they do not need to be the same. In this embodiment, several moving blocks 9 are fixedly connected to the connecting rod 8, and two adjacent moving blocks 9 are in contact with each other.

[0023] like Figure 7 and Figure 9 As shown, the moving block 9 is fixedly connected to the extrusion block 10. The extrusion block 10 has an arc-shaped surface on the side near the support base 3. The extrusion block 10 is made of an elastic deformable material. The extrusion block 10 transforms the original hard extrusion between the moving block 9 and the sample into a flexible extrusion between the extrusion block 10 and the sample, thereby reducing the deformation of the sample when it is extruded.

[0024] In this embodiment, the lower sides of all positioning blocks 6 are flush, and the lower sides of all pressing blocks 10 are flush.

[0025] The specific workflow of this embodiment is as follows: When this device is needed to test the thickness of a sample, first zero the pointer of the dial indicator 2, then lift the probe of the dial indicator 2, then place the sample on the support base 3 and adjust the position of the sample so that the test point of the sample is below the probe of the dial indicator 2. Then rotate the first threaded rod 4, and the first threaded rod 4 drives the fixed plate 5 to move downward along the first guide rod on the support base 3 through the external thread of the first threaded rod 4. The fixed plate 5 drives the positioning block 6 to move downward. At the same time, the fixed plate 5 drives the connecting rod 8 to move downward through the second guide rod and the second threaded rod 7. The connecting rod 8 drives the moving block 9 to move downward. The moving block 9 drives the adjacent extrusion block 10 to move synchronously.

[0026] As the multiple positioning blocks 6 move downwards, they gradually come into contact with the sample, and the pressing block 10 simultaneously comes into contact with the sample. The left side of the sample is clamped by the combined action of the positioning blocks 6 and the support base 3. Then, the first threaded rod 4 stops rotating, and the second threaded rod 7 rotates simultaneously. The connecting rod 8 on the second threaded rod 7 moves to the right along the second guide rod on the fixed plate 5 via the external thread transmission rod 8. During the movement, the connecting rod 8 drives several moving blocks 9 to move. The moving blocks 9 drive the adjacent pressing blocks 10 to move to the right simultaneously. The pressing blocks 10 together smooth the sample, making it more horizontal and reducing the degree of bending of the sample, thereby improving the accuracy of the sample test results. (During this process, the pressing block 10 is deformed by the joint pressing of the moving blocks 9 and the sample, thereby reducing the degree of deformation of the sample under the pressure, further improving the accuracy of the sample test results.)

[0027] After the connecting rod 8 moves the extrusion block 10 to the right and close to the right edge of the sample, stop rotating the second threaded rod 7. Then, release the probe of the dial indicator 2 and let it fall naturally to measure the thickness of the sample. After the measurement is completed, lift the probe of the dial indicator 2 again and rotate the second threaded rod 7 in the opposite direction. The second threaded rod 7 will then move the connecting rod 8 to the left relative to the fixed plate 5 to the initial position. Then, rotate the first threaded rod 4 in the opposite direction to reset the fixed plate 5 to the initial position. Then, change the position of the sample and continue to measure other positions of the sample according to the above operation until the measurement is completed.

[0028] During the process of measuring the thickness of the sample, the specific position of the dial gauge 2 can be adjusted by the bracket on the fixed base 1, thereby achieving the purpose of measuring the thickness of the sample at different positions (the bracket is an existing device, so its specific adjustment process will not be described in detail).

[0029] Example 2 This embodiment discloses a thickness detection device suitable for railway drainage boards, which is a further modification based on Embodiment 1.

[0030] like Figure 3 , Figure 6 and Figure 7 As shown, the connecting rod 8 and the fixing plate 5 are jointly provided with a connecting assembly, which includes a plurality of first fixing shells 11 and a plurality of second fixing shells 12. The number of first fixing shells 11 is the same as the number of positioning blocks 6, and the number of second fixing shells 12 is the same as the number of moving blocks 9. Adjacent first fixing shells 11 are slidably connected, and the connection state of adjacent first fixing shells 11 is shown in the figure. Figure 6 The first fixed shells 11 on both sides are fixed to the fixed plate 5. Initially, the first fixed shell 11 in the middle is located at the lowest side, and the height of all the first fixed shells 11 gradually increases from the middle to both sides. The positioning block 6 is set in the adjacent first fixed shell 11. In this embodiment, the positioning block 6 is fixed to the adjacent first fixed shell 11, and the two adjacent second fixed shells 12 are slidably connected. The connection state of the two adjacent second fixed shells 12 is referred to Figure 6 The connection state of two adjacent first fixed shells 11 is sufficient. The second fixed shells 12 on both sides are set on the connecting rod 8, and the moving block 9 is set in the adjacent second fixed shell 12. Initially, the second fixed shell 12 in the middle is located at the bottom, and the height of all the second fixed shells 12 gradually increases from the middle to both sides. In this embodiment, the second fixed shells 12 on both sides are directly fixed to the connecting rod 8, and the moving block 9 is fixed to the adjacent second fixed shell 12.

[0031] The specific workflow of this embodiment is as follows: As the fixing plate 5 moves downward, it drives several first fixing shells 11 downward, and the first fixing shells 11 drive adjacent positioning blocks 6 to move downward synchronously until the middle positioning block 6 moves downward to contact the upper side of the sample (i.e., the lowermost positioning block 6 moves downward to contact the upper side of the sample). At this point, the positioning block 6 is blocked by the sample and cannot move further downward (the middle first fixing shell 11 stops moving synchronously). Then, the fixing plate 5 drives the remaining positioning blocks 6 to continue moving downward, causing the positioning block 6 to move upward relative to the other positioning blocks 6. Even if the middle first fixing shell 11 slides relative to its two adjacent first fixing shells 11, when the two positioning blocks 6 adjacent to the middle positioning block 6 move downward to contact the upper side of the sample, these two positioning blocks 6 stop moving synchronously (the middle first fixing shell 11 stops moving synchronously). (The adjacent first fixed shells 11 of the positioning block 6 stop moving synchronously), so that as the fixing plate 5 continues to move downward, these two first fixed shells 11 move upward relative to the adjacent first fixed shells 11, until all the positioning blocks 6 have moved downward to contact the upper side of the sample (that is, when the positioning blocks 6 located on the front and rear sides of the fixing plate 5 have moved downward to contact the upper side of the sample), the fixing plate 5 moves downward to the limit position. At this time, the fixing plate 5 contacts all the first fixed shells 11, and the fixing plate 5 presses the positioning blocks 6 through the first fixed shells 11, and then stops rotating the first threaded rod 4 (the movement process of the remaining first fixed shells 11 can be referred to the above, and will not be described in detail again, and the movement process of all moving blocks 9 and all second fixed shells 12 can also refer to the movement process of positioning blocks 6 and first fixed shells 11 described above).

[0032] As the fixed plate 5 moves all the positioning blocks 6 downwards, all the positioning blocks 6, from the middle positioning block 6 to the positioning blocks 6 on both sides, come into contact with the sample in sequence. At the same time, as the connecting rod 8 moves all the moving blocks 9 and all the pressing blocks 10 downwards, all the pressing blocks 10, from the middle pressing block 10 to the pressing blocks 10 on both sides, come into contact with the sample in sequence. Thus, as all the positioning blocks 6 and all the pressing blocks 10 move, they work together to smooth the sample again (the smoothing direction is from the middle to the front and back sides), so that the deformation in the middle of the sample gradually changes to the sides, thereby providing the flatness of the sample after it is smoothed.

[0033] Example 3 This embodiment discloses a thickness detection device suitable for railway drainage boards, which is a further modification based on Embodiment 2.

[0034] like Figures 3-6As shown, a first adjusting component is provided inside the first fixed shell 11. The first adjusting component includes a first tension spring 13 and a first fixing pin 16. The first fixed shell 11 is slidably connected to the adjacent positioning block 6. The first tension spring 13 is fixed between the adjacent first fixed shell 11 and the adjacent positioning block 6. Initially, the first tension spring 13 is in a stretched state, which is used to drive the adjacent positioning block 6 to move upward. The first fixing pin 16 is slidably connected to the adjacent first fixed shell 11. The first fixing pin 16 is located on the left side of the first fixed shell 11. The first fixing pin 16 extends into the adjacent positioning block 6 and limits its movement.

[0035] like Figure 7 and Figure 9 As shown, a second adjusting assembly is provided inside the second fixed housing 12. The second adjusting assembly includes a second tension spring 18 and a second fixing pin 21. The second fixed housing 12 is slidably connected to the adjacent moving block 9. The second tension spring 18 is fixed between the adjacent second fixed housing 12 and the adjacent moving block 9. Initially, the second tension spring 18 is in a stretched state, which is used to drive the adjacent positioning block 6 to move upward. The second fixing pin 21 is slidably connected to the adjacent second fixed housing 12. The second fixing pin 21 is located on the right side of the second fixed housing 12. The second fixing pin 21 extends into the adjacent moving block 9 and limits its movement.

[0036] The specific workflow of this embodiment is as follows: Considering that the sample needs to be cut during preparation, and that the cut sample may have warped edges or burrs on the sides, when the positioning block 6 and the moving block 9 contact the side of the sample, they will squeeze the side of the sample. Especially when the moving block 9 moves to smooth the sample, it can cause the sample to curl or fold, increasing the thickness at the sample edge and creating a height difference between the middle and the sides of the sample, thus affecting the accuracy of the detection results. In this embodiment, this problem is solved by the following measures, mainly as follows: After placing the sample on the support 3, the number of positioning blocks 6 and moving blocks 9 in contact with the sample is adjusted according to the size of the sample. The following description takes the movement process of the foremost positioning block 6 as an example: Pull the first fixing pin 16 to the left, so that the first fixing pin 16 gradually moves out of the adjacent positioning block 6 (the first fixing pin 16 and the positioning block 6 gradually lose contact). After the first fixing pin 16 completely loses contact with the positioning block 6 (and the first fixing pin 16 is completely pulled out from the adjacent first fixing shell 11), the positioning block 6 can move upward along the adjacent first fixing shell 11 under the action of the adjacent first tension spring 13. Thus, when the fixing plate 5 moves downward to the limit position (that is, the position where the sample is fixed by several positioning blocks 6), the lower side of the foremost positioning block 6 is higher than the lower side of the other positioning blocks 6, so that the foremost positioning block 6 does not contact the sample, thereby avoiding contact between the positioning block 6 and the side of the sample, ensuring the flatness of the sample, and reducing the error that occurs during the detection process.

[0037] The specific moving process of the moving block 9 can be referred to the moving process of the positioning block 6 described above, thereby reducing the number of moving blocks 9 in contact with the sample, avoiding contact between the moving blocks 9 and the sides of the sample during the moving process, and ensuring the flatness of the sample.

[0038] After the test is completed, the fixing plate 5 and the connecting rod 8 are reset to their initial positions as described above. After both are reset to their initial positions, the foremost positioning block 6 is pulled down. During the downward movement of the positioning block 6, the first tension spring 13 is stretched. Then, when the positioning block 6 is reset to its initial position relative to the adjacent first fixing shell 11, the first fixing pin 16 is reinserted into the first fixing shell 11 and the positioning block 6. The first fixing pin 16 then limits the positioning block 6 again for subsequent use. The specific reset process of the moving block 9 will not be described in detail. Refer to the reset process of the positioning block 6.

[0039] Example 4 This embodiment discloses a thickness detection device suitable for railway drainage boards, which is a further modification based on Embodiment 3.

[0040] like Figure 7 and Figure 8 As shown, a rotating rod 23 is rotatably connected to the lower side of the connecting rod 8. Initially, the lower side of the rotating rod 23 is not parallel to the horizontal plane. The second fixed shells 12 on both sides are fixedly connected to the rotating rod 23. A limiting block 24 is fixedly connected to the right side of the connecting rod 8. The limiting block 24 is slidably connected to the rotating rod 23. The limiting block 24 is used to limit the angle of counterclockwise rotation of the rotating rod 23.

[0041] like Figure 7 and Figure 8 As shown, a damper is provided between the connecting rod 8 and the rotating rod 23, and the resistance to rotation between the two is greater than the sum of the weight of the rotating rod 23 and all its parts, so that the lower side of the rotating rod 23 cannot initially rotate to a position parallel to the horizontal plane due to the influence of its own weight and the weight of all its parts.

[0042] like Figure 1 , Figure 7 and Figure 8 As shown, the minimum distance between the extrusion block 10 and the support base 3 is less than the minimum distance between the adjacent positioning block 6 and the support base 3, so that the extrusion block 10 contacts the sample before the adjacent positioning block 6, and is thus driven to rotate by the extrusion of the sample.

[0043] The specific workflow of this embodiment is as follows: As the fixed plate 5 moves downward synchronously with the other connected parts thereon (at this time, the specific number of positioning blocks 6 and moving blocks 9 in contact with the sample has been adjusted according to the specific shape of the sample; in the following text, the positioning blocks 6 and moving blocks 9 and the pressing block 10 still in the working position will be referred to as the positioning blocks 6, moving blocks 9 and pressing blocks 10 in use), when the middle pressing block 10 moves downward to contact the upper side of the sample, the middle positioning block 6 does not contact the upper side of the sample. When all the pressing blocks 10 in use move downward to contact the upper side of the sample, the fixed plate 5 does not contact the first fixed shell 11 in the middle (the positioning blocks 6 on both sides do not contact the upper side of the sample). As the fixed plate 5 continues to move downward, the sample presses the pressing block 10 in contact with it, causing the pressing block 10 to be subjected to pressing force, which drives the rotating rod 23 to rotate relative to the connecting rod 8. Figure 1 (Using the reference viewpoint, the rotation direction is counterclockwise) thereby increasing the included angle between the extrusion block 10 and the positioning block 6. When the fixing plate 5 contacts all the first fixing shells 11, the fixing plate 5 no longer moves downward. At this time, the rotating rod 23 cannot continue to rotate due to the limitation of the limiting block 24, that is, the rotation angle of the rotating rod 23 reaches the maximum, thereby causing all the moving blocks 9 to move in an inclined state, increasing the rightward force applied by the moving blocks 9 to the sample, so that the moving blocks 9 continuously apply a stable pulling force to the sample during the rightward movement, gradually adjusting the local tension distribution and improving the flatness of the sample.

[0044] After the fixed plate 5 stops moving downwards, move the connecting rod 8 to the right as described above. During this process, the tilted moving block 9 smooths the sample to increase the accuracy of the test results.

[0045] Example 5 This embodiment discloses a thickness detection device suitable for railway drainage boards, which is a further modification based on embodiment 4.

[0046] like Figure 1 , Figure 2 , Figure 10 and Figure 11As shown, the support base 3 is equipped with an adjustment component for changing the contact area between the support base 3 and the workpiece. The adjustment component includes several support blocks 25, all of which are slidably connected to the support base 3. The specific number of support blocks 25 can be selected by the operator during actual use. In the figure, the number of support blocks 25 is the same as the number of positioning blocks 6, but they do not need to be the same in actual use. A third tension spring 26 is fixed between the support block 25 and the support base 3. Initially, the third tension spring 26 is in a stretched state, which is used to drive the support block 25 to move downward. The support base 3 is slidably connected with a third fixing pin 29, which is the same number as the number of support blocks 25. The third fixing pin 29 extends into the adjacent support block 25 and limits its movement.

[0047] The specific workflow of this embodiment is as follows: When the sample is placed on the support base 3, the sample is on top of several support blocks 25. Then, the position of the support blocks 25 is changed according to the size of the sample, so that the support blocks 25 support the middle of the sample. Taking the front side of the sample as the cutting edge as an example: Pull the third fixing pin 29 on the front side to the left, so that the third fixing pin 29 on the front side gradually loses contact with the support block 25 on the front side. When the third fixing pin 29 on the front side no longer limits the support block 25, the support block 25 on the front side moves downward along the support seat 3 under the action of the third tension spring 26 on the front side, so that the support block 25 on the front side does not contact the front side edge of the sample. That is, it avoids the burrs and warped edges generated at the cutting edge of the front side of the sample from contacting the support block 25, thereby avoiding the sample tilting due to the support at the cutting edge of the front side of the sample, and further improving the flatness of the sample.

[0048] Then, following the above operation, adjust the specific number of positioning blocks 6 and moving blocks 9 used according to the specific shape of the sample, so that the front side of the sample is not subjected to any pressure, preventing the cut edge of the front side of the sample from being subjected to pressure and affecting the flatness of the sample, thereby ensuring the accuracy of the test results.

[0049] If both the front and back sides of the sample are cut edges, simply adjust the positions of the support blocks 25 on both sides as described above. After adjusting the positions of the support blocks 25, the thickness of the sample can be measured as described above.

[0050] After the sample is tested, all positioning blocks 6 and all moving blocks 9 are reset to their initial positions according to the above operation, so that other samples can be tested later. The specific reset process of support block 25 can be referred to the specific reset process of positioning block 6, and will not be described in detail here.

[0051] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and its improved concept, should be covered within the scope of protection of this application.

Claims

1. A thickness detection device suitable for railway drainage boards, characterized in that, It includes a fixed base (1), the fixed base (1) is provided with a dial indicator (2) and a support base (3), and the support base (3) is provided with a smoothing component for smoothing the workpiece; The smoothing component includes a first threaded rod (4), a fixed plate (5), several positioning blocks (6), a second threaded rod (7), a connecting rod (8), and several moving blocks (9). The first threaded rod (4) is rotatably connected to the support base (3). The support base (3) is fixedly connected to a first guide rod. The fixed plate (5) is threadedly connected to the first threaded rod (4). The fixed plate (5) is slidably connected to the first guide rod on the support base (3). Several positioning blocks (6) are all disposed on the fixed plate (5). The second threaded rod (7) is rotatably connected to the fixed plate (5). The fixed plate (5) is fixedly connected to a second guide rod. The connecting rod (8) is threadedly connected to the second threaded rod (7). The connecting rod (8) is slidably connected to the second guide rod on the fixed plate (5). Several moving blocks (9) are all disposed on the connecting rod (8). The connecting rod (8) and the fixing plate (5) are provided with a connecting assembly. The connecting assembly includes a plurality of first fixing shells (11) and a plurality of second fixing shells (12). The number of first fixing shells (11) is the same as the number of positioning blocks (6), and the number of second fixing shells (12) is the same as the number of moving blocks (9). Two adjacent first fixing shells (11) are slidably connected. The first fixing shells (11) on both sides are fixed to the fixing plate (5). The positioning blocks (6) are disposed in adjacent first fixing shells (11). Two adjacent second fixing shells (12) are slidably connected. The second fixing shells (12) on both sides are disposed on the connecting rod (8), and the moving blocks (9) are disposed in adjacent second fixing shells (12).

2. The thickness detection device for railway drainage boards according to claim 1, characterized in that, The movable block (9) is fixedly connected to the pressing block (10), and the pressing block (10) has an arc-shaped surface on the side near the support base (3).

3. The thickness detection device for railway drainage boards according to claim 2, characterized in that, The extrusion block (10) is made of an elastic deformable material.

4. The thickness detection device for railway drainage boards according to claim 3, characterized in that, The first fixed shell (11) is provided with a first adjustment component, which includes a first tension spring (13) and a first fixing pin (16). The first fixed shell (11) is slidably connected to the adjacent positioning block (6). The first tension spring (13) is fixed between the adjacent first fixed shell (11) and the adjacent positioning block (6) to change the position of the adjacent positioning block (6). The first fixing pin (16) is slidably connected to the adjacent first fixed shell (11) and extends into the adjacent positioning block (6) to limit its position.

5. The thickness detection device for railway drainage boards according to claim 4, characterized in that, The second fixed shell (12) is provided with a second adjustment component, which includes a second tension spring (18) and a second fixing pin (21). The second fixed shell (12) is slidably connected to the adjacent moving block (9). The second tension spring (18) is fixed between the adjacent second fixed shell (12) and the adjacent moving block (9) to change the position of the adjacent moving block (9). The second fixing pin (21) is slidably connected to the adjacent second fixed shell (12) and extends into the adjacent moving block (9) to limit its movement.

6. The thickness detection device for railway drainage boards according to claim 5, characterized in that, The connecting rod (8) is rotatably connected to a rotating rod (23) on the side near the support base (3). The second fixed shells (12) on both sides are fixed to the rotating rod (23). The connecting rod (8) is fixed to a limiting block (24). The limiting block (24) is slidably connected to the rotating rod (23). The limiting block (24) is used to limit the rotation angle of the rotating rod (23).

7. A thickness detection device for railway drainage boards according to claim 6, characterized in that, Damping is provided between the connecting rod (8) and the rotating rod (23).

8. A thickness detection device for railway drainage boards according to claim 7, characterized in that, The minimum distance between the extrusion block (10) and the support base (3) is less than the minimum distance between the adjacent positioning block (6) and the support base (3), so that the extrusion block (10) contacts the workpiece before the adjacent positioning block (6).

9. A thickness detection device for railway drainage boards according to claim 8, characterized in that, The support base (3) is provided with an adjustment component for changing the contact area between the support base (3) and the workpiece. The adjustment component includes a plurality of support blocks (25), all of which are slidably connected to the support base (3). A third tension spring (26) is fixed between the support block (25) and the support base (3). The support base (3) is slidably connected with a third fixing pin (29) in the same number as the number of support blocks (25). The third fixing pin (29) extends into the adjacent support block (25) and limits its movement.

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