Strain measuring device for strain ring
By designing a strain ring strain measurement device including a measuring bracket and a strain measurement mechanism, the problems of inconvenience and error of strain ring measurement in the prior art are solved, and high-precision and repeatable strain ring measurement are achieved.
Patent Information
- Application Number
- CN202420707454.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-01-24
- Filing Date
- 2024-04-08
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-04-08
AI Technical Summary
The prior art lacks an effective strain ring measuring device, which leads to inconvenience in measuring, large errors, and small deformation of the strain ring is easily ignored.
A strain ring strain measurement device is designed, including a measuring bracket and a strain measurement mechanism. The strain measurement mechanism consists of a front support, a rear support, a movable roof plate, a fixed support, a movable support, a driving member, a driving member and a dial gauge. The movable roof plate is driven to move forward and backward through the driving member, and the strain ring is tested with a thrust or tension force, and the measured value is displayed through the dial gauge.
Strain ring strain measurement with novel structure, convenient measurement, high accuracy, small error and repeated measurement is achieved, and the problems of inconvenience and large error in the prior art are solved.
Smart Images
Figure CN222799915U_ABST
Abstract
Description
[0001] This application claims priority to Chinese Patent Application No. 2024100949299, filed on January 24, 2024, entitled STRAIN RING STRAIN MEASURING DEVICE. Technical Field
[0002] The utility model relates to the technical field of strain ring testing, in particular to a strain ring strain measuring device. Background Art
[0003] In the application of pile foundation engineering, the application scenarios and usage methods of pile foundation detection are very popular. The strain ring is mainly used to test and determine whether the vertical compressive bearing capacity of the pile foundation meets the design requirements. The strain ring needs to be measured before use to understand its strain characteristics. The existing technology lacks a measuring device for testing the strain ring, and the strain ring usually has a small deformation and is easily overlooked, which makes the measurement inconvenient and the measurement error large. Summary of the invention
[0004] The utility model aims to solve the deficiencies of the prior art and provide a strain ring strain measuring device which has novel structure, convenient measurement, high accuracy, small error and can measure repeatedly.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A strain ring strain measuring device, characterized in that: it includes a measuring bracket, the measuring bracket is provided with a strain measuring mechanism, the strain measuring mechanism includes a front support, a rear support, a movable top plate, a fixed support, a movable support, a driving component and a micrometer, the front end of the measuring bracket is provided with a front support, the rear end is provided with a rear support, a movable top plate is provided between the front support and the rear support, the movable top plate is connected to the measuring bracket in a front and rear sliding manner, the movable top plate is fixedly provided with a movable support at the upper end of the front part of the movable top plate, a table through hole is provided on the movable top plate, the lower end of the front support is fixed with the measuring bracket A fixed connection is provided on the front support, and the fixed pillar cooperates with the movable pillar. A driving component is provided on the rear support, and the driving component is connected to the rear support. The movable top plate is driven by the driving assembly. The head of the micrometer passes through the table perforation to expose the movable top plate. The micrometer is installed on the movable top plate. The telescopic probe of the micrometer abuts against the rear support to facilitate limiting the strain ring through the fixed pillar and the movable pillar. The driving component drives the movable top plate to move forward and backward to extrude or stretch the strain ring, and the measurement value of the extrusion or stretching is displayed by the micrometer.
[0007] The driving component of the utility model comprises a hand wheel and a screw rod, a threaded hole is provided at the rear end of the movable top plate, a hand wheel is provided at the rear side of the rear support, a rod through hole is provided on the rear support, a screw rod is provided at the front end of the hand wheel, the rear end of the screw rod is fixedly connected to the hand wheel, and the front end passes through the rod through hole, extends into the threaded hole and is threadedly connected to the movable top plate, so as to facilitate the screw rod to rotate by rotating the hand wheel, and then drive the movable top plate to move forward and backward, and apply thrust or tension to the strain ring for testing.
[0008] The utility model discloses a movable top plate with a moving block at the rear end, a movable top plate with a front end fixedly connected to the movable top plate, a threaded hole at the rear end, a screw rod of the hand wheel passes through the rod through-hole, extends into the threaded hole and is threadedly connected to the moving block, so that the screw rod of the hand wheel is connected through the moving block, and the connection is convenient.
[0009] The driving component of the utility model includes a handwheel and a screw rod. The handwheel is provided on the rear side of the rear support, and a threaded through hole is provided on the rear support. A screw rod is fixedly provided at the front end of the handwheel. The screw rod passes through the rear support and abuts against the movable top plate. The screw rod is threadedly connected to the rear support so that when in use, the screw rod can be driven to rotate by rotating the handwheel to push the movable top plate forward and perform a thrust test on the strain ring.
[0010] The utility model discloses a movable top plate with a moving block at the rear end, wherein the front end of the moving block is fixedly connected to the movable top plate, and the rear end abuts against the front end of the screw rod, so as to push the movable top plate by pushing the moving block, thereby avoiding directly pushing the movable top plate to cause damage to the movable top plate.
[0011] The utility model provides a clamping block at the lower end of the movable top plate, a connecting through hole is provided in the middle of the clamping block, the upper end of the clamping block is fixedly connected to the movable top plate, the fixed shaft sleeve of the micrometer passes through the connecting through hole, the fixed shaft sleeve of the micrometer is fixedly connected to the clamping block, so that the fixed shaft sleeve of the micrometer is fixed on the movable top plate through the clamping block, and then the micrometer is fixedly connected to the movable top plate.
[0012] The upper end surface of the front support of the utility model is flush with the upper end surface of the movable top plate, so as to facilitate the placement of the strain ring, so that the strain ring can be kept horizontal during the measurement process.
[0013] The handwheel of the utility model is fixedly provided with a handwheel disk, the outer circumferential side surface of the handwheel disk is engraved with handwheel scale lines, the rear end surface of the handwheel disk is engraved with graduation marks, and the graduation marks are matched with the handwheel scale lines to ensure that the scales rotated by the handwheel are the same during each measurement through the graduation marks and the handwheel scale lines, thereby reducing measurement errors.
[0014] The utility model provides a handle fixed on the hand wheel disk, wherein a through hole is arranged in the middle of the handle, a long screw is inserted into the through hole, and the long screw passes through the handle and is fixedly connected with the hand wheel disk, so as to facilitate the hand wheel disk to rotate by rotating the handle.
[0015] The utility model discloses a measuring bracket with guide rails fixedly provided on the left and right sides, a movable top plate with slides on the left and right sides of the lower end, the slides are fixedly connected to the movable top plate, and the movable top plate is slidably connected to the measuring bracket via the slides and the guide rails, so as to facilitate the movable top plate to move forward and backward smoothly.
[0016] The utility model has the advantages of novel structure, convenient measurement, high accuracy, small error, and repeatable measurement due to the adoption of the above structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model.
[0018] Figure 2 This utility model Figure 1 sectional view of .
[0019] Figure 3 This utility model Figure 1 Bottom view of .
[0020] Figure 4 It is an enlarged schematic diagram of the movable top plate in the utility model.
[0021] Figure 5 It is an enlarged schematic diagram of the micrometer in the utility model.
[0022] Figure 6 It is an enlarged schematic diagram of an angle of the hand wheel in the utility model.
[0023] Figure 7 It is an enlarged schematic diagram of another angle of the hand wheel in the utility model.
[0024] Figure 8 It is a structural schematic diagram of the strain ring in the utility model.
[0025] Fig. 9 It is another structural schematic diagram of the utility model.
[0026] Figure numerals: measuring bracket 1, strain measuring mechanism 2, front support 3, rear support 4, movable top plate 5, fixed pillar 6, movable pillar 7, handwheel 8, micrometer 9, dial through hole 10, threaded hole 11, screw 12, dial head 13, telescopic probe 14, moving block 15, clamping block 16, fixed sleeve 17, handwheel disk 18, handwheel scale line 19, graduation mark 20, handle 21, long screw 22, guide rail 23, slide 24, strain ring 25, front fixing hole 26, rear fixing hole 27. DETAILED DESCRIPTION
[0027] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.
[0028] Example 1
[0029] A strain ring strain measuring device, characterized in that: it comprises a measuring bracket 1, on which a strain measuring mechanism 2 is arranged, and the strain measuring mechanism 2 comprises a front support 3, a rear support 4, a movable top plate 5, a fixed support 6, a movable support 7, a hand wheel 8, and a micrometer 9.
[0030] The front end of the measuring bracket 1 is provided with a front support 3, and the rear end is provided with a rear support 4. A movable top plate 5 is provided between the front support 3 and the rear support 4. The movable top plate 5 is connected to the measuring bracket 1 for sliding forward and backward. A movable pillar 7 is fixedly provided at the upper front end of the movable top plate 5. A surface through hole 10 is provided on the movable top plate 5. A threaded hole 11 is provided at the rear end of the movable top plate 5. The lower end of the front support 3 is fixedly connected to the measuring bracket 1. A fixed pillar 6 is fixedly provided on the front support 3. The fixed pillar 6 cooperates with the movable pillar 7. A hand wheel 8 is provided on the rear side of the rear support 4. The rod is perforated, and a screw rod 12 is fixedly arranged at the front end of the handwheel 8. The rear end of the screw rod 12 is fixedly connected to the handwheel 8. The screw rod 12 passes through the rod perforation, extends into the threaded hole 11 and is threadedly connected to the movable top plate 5. The head 13 of the micrometer 9 passes through the table perforation 10 to expose the movable top plate 5. The micrometer 9 is installed on the movable top plate 5. The telescopic probe 14 of the micrometer 9 abuts against the rear support 4, so that when in use, the strain ring is limited by the fixed pillar and the movable column, and the screw rod is driven to rotate by rotating the handwheel, thereby driving the movable top plate to move back and forth, and applying thrust or tension to the strain ring for testing.
[0031] The upper end surface of the front support 3 of the utility model is flush with the upper end surface of the movable top plate 5, so as to facilitate the placement of the strain ring so that the strain ring can remain horizontal during the measurement process.
[0032] The utility model discloses a movable top plate 5 with a moving block 15 at the rear end, the moving block 15 is fixedly connected to the movable top plate 5 at the front end, and a threaded hole 11 is provided at the rear end, the screw rod 12 of the hand wheel 8 passes through the rod through-hole, extends into the threaded hole 11 and is threadedly connected to the moving block 15, so that the screw rod of the hand wheel is connected through the moving block, and the connection is convenient.
[0033] The utility model provides a clamping block 16 at the lower end of the movable top plate 5, a connecting through hole is provided in the middle of the clamping block 16, the upper end of the clamping block 16 is fixedly connected to the movable top plate 5, the fixed shaft sleeve 17 of the micrometer 9 passes through the connecting through hole, the fixed shaft sleeve 17 of the micrometer 9 is fixedly connected to the clamping block 16, so that the fixed shaft sleeve of the micrometer is fixed on the movable top plate through the clamping block, and then the micrometer is fixedly connected to the movable top plate in a limit position.
[0034] A handwheel disc 18 is fixedly provided on the handwheel 8 of the utility model, and a handwheel scale line 19 is engraved on the outer circumferential side surface of the handwheel disc 18, and a graduation mark 20 is engraved on the rear end surface of the handwheel disc 18. The graduation mark 20 cooperates with the handwheel scale line 19 to ensure that the scale rotated by the handwheel is the same during each measurement through the graduation mark and the handwheel scale line, thereby reducing measurement errors.
[0035] A handle 21 is fixed on the hand wheel disc 18 of the utility model. A through hole is provided in the middle of the handle 21. A long screw 22 is passed through the through hole. The long screw 22 passes through the handle 21 and is fixedly connected to the hand wheel disc 18, so as to facilitate the rotation of the hand wheel disc by rotating the handle.
[0036] The measuring bracket 1 of the utility model is fixedly provided with guide rails 23 on the left and right sides, and the movable top plate 5 is provided with slides 24 on the left and right sides of the lower end. The slides 24 are fixedly connected to the movable top plate 5. The movable top plate 5 is slidably connected to the measuring bracket 1 via the slides 24 and the guide rails 23 to facilitate smooth forward and backward movement of the movable top plate.
[0037] As attached Figure 8 The strain ring 25 is a prior art strain ring, the front portion of the strain ring 25 is provided with a front fixing hole 26, the rear portion is provided with a rear fixing hole 27, the front fixing hole 26 and the rear fixing hole 27 are provided between the strain area, the dial gauge 9 is a prior art dial gauge, the probe of the dial gauge 9 is telescopically connected to the fixed shaft sleeve 17 of the dial gauge 9, the fixed shaft sleeve 17 has a built-in spring, the telescopic probe 14 contracts after being squeezed, and can automatically return to its original position after no external force is applied, the above is a prior art, and will not be described in detail, as shown in the attached drawings. Figure 1 -Attached Figure 7 In this embodiment 1, a pulling force can be applied to the strain ring 25, and a pushing force can also be applied to the strain ring 25, which are described below respectively:
[0038] Steps to apply tension:
[0039] Step 1: Rotate the handle 21 to adjust the front and rear positions of the movable top plate 5 so that the distance between the movable support 7 and the fixed support 6 matches the distance between the front fixing hole 26 and the rear fixing hole 27 of the strain ring 25. Stop rotating the handle 21, place the strain ring 25 front and back, with the fixed support 6 passing through the front fixing hole 26 and the movable support 7 passing through the rear fixing hole 27. Figure 1 and attached Figure 2 ;
[0040] Step 2: Check the telescopic probe 14 of the micrometer 9 to ensure that the rear end of the telescopic probe 14 of the micrometer 9 is against the rear support 4, the telescopic probe 14 is in an extended and compressible state, rotate the handle 21, the screw 12 is threadedly connected to the moving block 15, the screw 12 rotates, drives the moving block 15 to move backward, the moving block 15 drives the movable top plate 5 to slide backward, the movable top plate 5 pulls the rear part of the strain ring 25 to move backward, the telescopic probe 14 of the micrometer 9 is squeezed to the rear support 4, the telescopic probe 14 shrinks backward into the fixed sleeve 17 of the micrometer 9, squeezes the spring in the fixed sleeve 17, and the gauge head 13 of the micrometer 9 shows the measured value. At this time, the strain ring 25 is tightened, and the value of the gauge head 13 of the micrometer 9 is cleared, and the rotation of the handle 21 is stopped. As the initial position of the test section, observe the handwheel scale 19 and the graduation mark 20 of the handwheel 8, and record the graduation mark 20 corresponding to the handwheel scale 19 at the beginning;
[0041] Step 3: Rotate the handle 21 to make the movable top plate 5 continue to move backward, rotate the handwheel 18, record the graduation mark 20 corresponding to the handwheel scale line 19 and the measured value displayed on the header 13 of the micrometer 9, continue to rotate the handwheel 8, record the graduation mark 20 corresponding to the handwheel scale line 19 and the measured value of the header 13 of the micrometer 9, and repeat this process. Within the range of the allowable stretching length of the strain ring 25, multiple sets of data are obtained. Each time the handwheel 18 is rotated, the handwheel scale line 19 that is rotated can be the same. In this way, the difference in the measured value of the header 13 when the same scale line is rotated can be quickly obtained, which is the displacement difference of the strain of the strain ring 25, so as to analyze the strain characteristics of the strain ring 25.
[0042] After the tensile test of the strain ring 25 is completed, the hand wheel 18 can also be rotated in the reverse direction to measure the return displacement of the strain ring 25, and the steps are as follows:
[0043] Step 1: Rotate the handle 21 to adjust the front and rear positions of the movable top plate 5 so that the distance between the movable support 7 and the fixed support 6 matches the distance between the front fixing hole 26 and the rear fixing hole 27 of the strain ring 25. Stop rotating the handle 21, place the strain ring 25 front and back, with the fixed support 6 passing through the front fixing hole 26 and the movable support 7 passing through the rear fixing hole 27. Figure 1 and attached Figure 2 ;
[0044] Step 2: Check the telescopic probe 14 of the micrometer 9, ensure that the rear end of the telescopic probe 14 of the micrometer 9 is against the rear support 4, and the telescopic probe 14 is in a compressed and extendable state, rotate the handle 21, the screw 12 rotates, and drives the moving block 15 to move forward, and the moving block 15 drives the movable top plate 5 to slide forward, and the movable top plate 5 pushes the rear part of the strain ring 25 to move forward, and the micrometer 9 moves forward with the movable top plate 5, and the probe of the micrometer 9 is away from the rear support 4, and extends backward under the action of the spring rebound force, and the head 13 of the micrometer 9 displays the measured value. At this time, the strain ring 25 is squeezed, and the value of the head 13 of the micrometer 9 is cleared, and the rotation of the handle 21 is stopped. As the initial position of the test section, observe the handwheel scale 19 and the graduation mark 20 of the handwheel 8, and record the graduation mark 20 corresponding to the handwheel scale 19 at the beginning;
[0045] The third step: rotate the handle 21 to make the movable top plate 5 continue to move forward, move the support 7 forward to squeeze the strain ring 25, rotate the handwheel disk 18, record the graduation mark 20 corresponding to the handwheel scale line 19 and the measured value displayed on the header 13 of the micrometer 9, continue to rotate the handwheel 8, record the graduation mark 20 corresponding to the handwheel scale line 19 and the measured value of the header 13 of the micrometer 9, and repeat this process. Within the range of the allowable contraction length of the strain ring 25, multiple groups of data are measured. Each time the handwheel disk 18 is rotated, the handwheel scale line 19 turned can be the same. In this way, the difference in the measured value of the header 13 when the same scale line is turned can be quickly obtained, which is the displacement difference of the strain of the strain ring 25, so as to analyze the strain characteristics of the strain ring 25.
[0046] Example 2
[0047] A strain ring strain measuring device, characterized in that: it comprises a measuring bracket 1, the measuring bracket 1 is provided with a strain measuring mechanism 2, the strain measuring mechanism 2 comprises a front support 3, a rear support 4, a movable top plate 5, a fixed support 6, a movable support 7, a hand wheel 8, and a micrometer 9, the front end of the measuring bracket 1 is provided with a front support 3, the rear end is provided with a rear support 4, a movable top plate 5 is provided between the front support 3 and the rear support 4, the movable top plate 5 is connected to the measuring bracket 1 in a front-to-back sliding manner, the movable top plate 5 is fixedly provided with a movable support 7 at the upper front end, and a surface perforation 10 is provided on the movable top plate 5, The lower end of the front support 3 is fixedly connected to the measuring bracket 1, and a fixed pillar 6 is fixedly provided on the front support 3, and the fixed pillar 6 cooperates with the movable pillar 7. A handwheel 8 is provided on the rear side of the rear support 4, and a threaded through hole is provided on the rear support 4. A screw rod 12 is fixedly provided at the front end of the handwheel 8, and the screw rod 12 passes through the rear support 4 and abuts against the movable top plate 5. The screw rod 12 is threadedly connected to the rear support 4, and the head 13 of the micrometer 9 passes through the table through hole 10 to expose the movable top plate 5. The micrometer 9 is installed on the movable top plate 5, and the telescopic probe 14 of the micrometer 9 abuts against the rear support 4, so that when in use, the strain ring is limited by the fixed pillar and the movable column, and the screw rod is driven to rotate by rotating the handwheel to push the movable top plate forward to perform a thrust test on the strain ring.
[0048] The upper end surface of the front support 3 of the utility model is flush with the upper end surface of the movable top plate 5, so as to facilitate the placement of the strain ring so that the strain ring can remain horizontal during the measurement process.
[0049] The movable top plate 5 of the utility model is provided with a moving block 15 at the rear end, the front end of the moving block 15 is fixedly connected to the movable top plate 5, and the rear end abuts against the front end of the screw rod 12, so as to push the movable top plate by pushing the moving block, thereby avoiding directly pushing the movable top plate to cause damage to the movable top plate 5.
[0050] The utility model provides a clamping block 16 at the lower end of the movable top plate 5, a connecting through hole is provided in the middle of the clamping block 16, the upper end of the clamping block 16 is fixedly connected to the movable top plate 5, the fixed shaft sleeve 17 of the micrometer 9 passes through the connecting through hole, the fixed shaft sleeve 17 of the micrometer 9 is fixedly connected to the clamping block 16, so that the fixed shaft sleeve of the micrometer is fixed on the movable top plate through the clamping block, and then the micrometer is fixedly connected to the movable top plate in a limit position.
[0051] A handwheel disc 18 is fixedly provided on the handwheel 8 of the utility model, and a handwheel scale line 19 is engraved on the outer circumferential side surface of the handwheel disc 18, and a graduation mark 20 is engraved on the rear end surface of the handwheel disc 18. The graduation mark 20 matches the handwheel scale line 19, and the graduation mark matches the handwheel scale line, so that it is convenient to know the distance moved by the movable top plate after the handwheel is rotated through the graduation mark and the handwheel scale line.
[0052] A handle 21 is fixed on the hand wheel disc 18 of the utility model, and a through hole is provided in the middle of the handle 21. The long screw 22 passes through the handle 21 and is fixedly connected to the hand wheel disc 18, so as to facilitate the rotation of the hand wheel disc by rotating the handle.
[0053] The measuring bracket 1 of the utility model is fixedly provided with guide rails 23 on the left and right sides, and the movable top plate 5 is provided with slides 24 on the left and right sides of the lower end. The slides 24 are fixedly connected to the movable top plate 5. The movable top plate 5 is slidably connected to the measuring bracket 1 via the slides 24 and the guide rails 23 to facilitate smooth forward and backward movement of the movable top plate.
[0054] The difference between Example 2 and Example 1 is that the connection relationship between the screw rod 12 of the hand wheel 8 and the rear support 4 and the moving block 15, and the connection relationship of other components is the same as that of Example 1. In Example 2, the screw rod 12 of the hand wheel 8 is threadedly connected to the rear support 4, and the screw rod 12 abuts against the rear support 4. In this way, only the moving block 15 can be pushed forward, so only the thrust test can be performed on the strain ring 25. The strain ring 25 is as shown in the attached Figure 8 The structure of the present invention is that the front part of the strain ring 25 is provided with a front fixing hole 26, and the rear part is provided with a rear fixing hole 27. The front fixing hole 26 and the rear fixing hole 27 are between the strain area. The dial gauge 9 is the dial gauge 9 in the prior art. The probe of the dial gauge 9 is telescopically connected to the fixed shaft sleeve 17 of the dial gauge 9. The fixed shaft sleeve 17 has a built-in spring. The probe shrinks after being squeezed and can automatically return to its original position when there is no external force. Fig. 9 In Example 2, the strain ring 25 can be subjected to a thrust test, and the steps are as follows:
[0055] Step 1: Rotate the handle 21 to move the front end of the screw rod 12 away from the movable top plate 5, manually move the movable top plate 5 to a suitable position, place the strain ring 25 front and back, pass the fixed support 6 through the front fixing hole 26, and the movable support 7 through the rear fixing hole 27, as shown in the attached Fig. 9 , rotate the handle 21 so that the screw rod 12 passes through the rear support 4, and the front end of the screw rod 12 abuts against the rear end of the moving block 15;
[0056] Step 2: Check the telescopic probe 14 of the micrometer 9 to ensure that the rear end of the telescopic probe 14 of the micrometer 9 is against the rear support 4, and the telescopic probe 14 is in a compressed and extendable state. Rotate the handle 21, and the screw 12 rotates. Because the rear support 4 is fixed, the screw 12 extends forward, pushing the moving block 15 and then pushing the movable top plate 5 forward. The movable top plate 5 pushes the rear part of the strain ring 25 to move forward. The micrometer 9 moves forward with the movable top plate 5. The probe of the micrometer 9 is away from the rear support 4 and extends backward under the action of the spring rebound force. The head 13 of the micrometer 9 displays the measured value. At this time, the strain ring 25 begins to be squeezed, and the measured value of the head 13 of the micrometer 9 is cleared. Stop rotating the handle 21 as the initial position of the test section, observe the handwheel scale 19 and the graduation mark 20 of the handwheel 8, and record the graduation mark 20 corresponding to the handwheel scale 19 at the beginning.
[0057] The third step: rotate the handle 21 to make the movable top plate 5 continue to move forward, move the support 7 forward to squeeze the strain ring 25, rotate the handwheel disk 18, record the graduation mark 20 corresponding to the handwheel scale line 19 and the measured value displayed on the header 13 of the micrometer 9, continue to rotate the handwheel 8, record the graduation mark 20 corresponding to the handwheel scale line 19 and the measured value of the header 13 of the micrometer 9, and repeat this process. Within the range of the allowable contraction length of the strain ring 25, multiple sets of data are measured to understand the strain characteristics of the strain ring 25. The handwheel scale line 19 rotated each time the handwheel disk 18 is rotated can be the same. In this way, it can be quickly concluded that the difference in the measured value of the header 13 when the same scale line is rotated is the displacement difference of the strain of the strain ring 25, so as to analyze the strain characteristics of the strain ring 25.
[0058] Embodiment 1 of the utility model can perform tension test or thrust test on the strain ring 25, and embodiment 2 can perform thrust test on the strain ring 25, which can be set according to the needs. In addition, in the tension test or thrust test, the strain ring 25 can be connected to other equipment for testing, such as connecting to an oscilloscope or a voltage conversion circuit, and the connection method adopts the existing technology. The strain ring 25 is used as a sensor, which can output a voltage value or force value proportional to the strain, so as to facilitate further and better research on the strain characteristics of the strain ring 25. When measuring, the installation setting can be selected according to the needs. The utility model has a simple structure and is easy to operate. The head 13 of the micrometer 9 is limited and fixed on the movable top plate 5, which is the same as the deformation direction of the strain ring 25, so as to realize the accurate measurement of the deformation displacement of the strain ring 25. The handwheel scale 19 and the graduation mark 20 are set on the handwheel disk 18 in the utility model, which can help the measurer understand the number of turns of the handwheel 8 and avoid errors caused by different numbers of turns of the handwheel 8. In addition, the utility model can measure repeatedly, which greatly reduces the cost of strain measurement of the strain ring 25.
[0059] The utility model has the advantages of novel structure, convenient measurement, high accuracy, small error, and repeatable measurement due to the adoption of the above structure.
Claims
1. A strain ring strain measuring device, characterized in that: The invention comprises a measuring bracket, on which a strain measuring mechanism is arranged, and the strain measuring mechanism comprises a front support, a rear support, a movable top plate, a fixed support, a movable support, a driving component and a micrometer. The front end of the measuring bracket is provided with a front support, and the rear end is provided with a rear support. A movable top plate is arranged between the front support and the rear support, and the movable top plate is connected to the measuring bracket for front and rear sliding. A movable support is fixedly arranged at the upper end of the front part of the movable top plate, and a table through hole is arranged on the movable top plate. The lower end of the front support is fixedly connected to the measuring bracket, a fixed support is fixedly arranged on the front support, and the fixed support cooperates with the movable support. A driving component is arranged on the rear support, and the driving component is connected to the rear support. The movable top plate is driven by a driving assembly, and the head of the micrometer passes through the table through hole to expose the movable top plate. The micrometer is mounted on the movable top plate, and the telescopic probe of the micrometer is against the rear support. A front fixing hole is arranged at the front of the strain ring, and a rear fixing hole is arranged at the rear. The fixed support passes through the front fixing hole, and the movable support (7) passes through the rear fixing hole. The driving component includes a handwheel and a screw rod. The rear end of the movable top plate is provided with a threaded hole, and the rear side of the rear support is provided with a handwheel. The rear support is provided with a rod through hole. The front end of the handwheel is fixed with a screw rod, and the rear end of the screw rod is fixedly connected to the handwheel. The screw rod passes through the rod through hole, extends into the threaded hole and is threadedly connected to the movable top plate. The handwheel is fixedly provided with a handwheel disk, and the outer circular side surface of the handwheel disk is engraved with handwheel scale lines, and the rear end surface of the handwheel disk is engraved with a graduation mark, and the graduation mark matches the handwheel scale line.
2. A strain ring strain measuring device according to claim 1, characterized in that: A moving block is provided at the rear end of the movable top plate, the front end of the moving block is fixedly connected to the movable top plate, and a threaded hole is provided at the rear end. The screw rod of the hand wheel passes through the rod through-hole, extends into the threaded hole and is threadedly connected to the moving block.
3. A strain ring strain measuring device according to claim 1 or 2, characterized in that: A clamping block is provided at the lower end of the movable top plate, a connecting through hole is provided in the middle of the clamping block, the upper end of the clamping block is fixedly connected to the movable top plate, the fixed shaft sleeve of the micrometer passes through the connecting through hole, and the fixed shaft sleeve of the micrometer is fixedly connected to the clamping block.
4. A strain ring strain measuring device according to claim 1 or 2, characterized in that: The upper end surface of the front support is flush with the upper end surface of the movable top plate.
5. A strain ring strain measuring device according to claim 1 or 2, characterized in that: A handle is fixed on the hand wheel disc, a through hole is arranged in the middle of the handle, a long screw is passed through the through hole, and the long screw passes through the handle and is fixedly connected to the hand wheel disc.
6. A strain ring strain measurement device, characterized in that: The invention comprises a measuring bracket, on which a strain measuring mechanism is arranged, and the strain measuring mechanism comprises a front support, a rear support, a movable top plate, a fixed support, a movable support, a driving component and a micrometer. The front end of the measuring bracket is provided with a front support, and the rear end is provided with a rear support. A movable top plate is arranged between the front support and the rear support, and the movable top plate is connected to the measuring bracket for front and rear sliding. A movable support is fixedly arranged at the upper end of the front part of the movable top plate, and a table through hole is arranged on the movable top plate. The lower end of the front support is fixedly connected to the measuring bracket, a fixed support is fixedly arranged on the front support, and the fixed support cooperates with the movable support. A driving component is arranged on the rear support, and the driving component is connected to the rear support. The movable top plate is driven by a driving assembly, and the head of the micrometer passes through the table through hole to expose the movable top plate. The micrometer is mounted on the movable top plate, and the telescopic probe of the micrometer is against the rear support. A front fixing hole is arranged at the front of the strain ring, and a rear fixing hole is arranged at the rear. The fixed pillar passes through the front fixing hole, and the movable pillar passes through the rear fixing hole. The driving component includes a handwheel and a screw rod. A handwheel is provided on the rear side of the rear support, and a threaded through hole is provided on the rear support. A screw rod is fixedly provided at the front end of the handwheel, and the screw rod passes through the rear support and abuts against the movable top plate. The screw rod is threadedly connected to the rear support, and a handwheel disk is fixedly provided on the handwheel. The outer circular side surface of the handwheel disk is engraved with handwheel scale lines, and the rear end surface of the handwheel disk is engraved with a graduation mark, and the graduation mark matches the handwheel scale line.
7. The strain ring strain measuring device according to claim 6, characterized in that: A moving block is arranged at the rear end of the movable top plate, the front end of the moving block is fixedly connected to the movable top plate, and the rear end abuts against the front end of the screw rod.
8. A strain ring strain measuring device according to claim 6 or 7, characterized in that: A clamping block is provided at the lower end of the movable top plate, a connecting through hole is provided in the middle of the clamping block, the upper end of the clamping block is fixedly connected to the movable top plate, the fixed shaft sleeve of the micrometer passes through the connecting through hole, and the fixed shaft sleeve of the micrometer is fixedly connected to the clamping block.
9. A strain ring strain measuring device according to claim 6 or 7, characterized in that: The upper end surface of the front support is flush with the upper end surface of the movable top plate.
10. A strain ring strain measuring device according to claim 6 or 7, characterized in that: A handle is fixed on the hand wheel disc, a through hole is arranged in the middle of the handle, a long screw is passed through the through hole, and the long screw passes through the handle and is fixedly connected to the hand wheel disc.