CN217605488U - Device for measuring normal bonding performance of track plate and mortar layer - Google Patents
Device for measuring normal bonding performance of track plate and mortar layer Download PDFInfo
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- CN217605488U CN217605488U CN202123220073.6U CN202123220073U CN217605488U CN 217605488 U CN217605488 U CN 217605488U CN 202123220073 U CN202123220073 U CN 202123220073U CN 217605488 U CN217605488 U CN 217605488U
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Abstract
The utility model relates to a technical field of check out test set discloses a measuring device that is used for track board and mortar layer normal direction adhesive property, include with sample axial complex go up anchor clamps and lower anchor clamps, go up anchor clamps, lower anchor clamps adopt the same structure, all be provided with the cavity that holds the sample tip, two the cavity difference suit is at a tip of sample, its side and the tip clamping contact that corresponds, its bottom surface links to each other with the tip that corresponds, and the one side relative with the bottom surface all is provided with the portion of drawing that links to each other with power application mechanism, power application mechanism is used for applying opposite direction's axial pull-out force simultaneously to the portion of drawing of last anchor clamps and lower anchor clamps to test the normal direction adhesive property between the track board layer and the mortar layer of sample. The axial drawing force for testing is provided through clamping contact of the side face of the cavity and the end part of the sample and connection of the bottom face of the cavity and the end part of the sample, so that local damage before cracking of a joint in the drawing process is avoided, and the testing stability is improved.
Description
Technical Field
The utility model relates to a check out test set's technical field, concretely relates to a measuring device that is used for track board and mortar bed normal direction adhesive property.
Background
With the continuous improvement of the running speed of the high-speed railway in China, higher requirements are put forward on the stability and the safety of the track, and the CRTS II type ballastless track which is used in China in large quantity is easy to have a large-scale CA mortar crack separation phenomenon in the initial operation stage, so that the safe and stable operation of a train track system is greatly influenced, and further research is needed on the damage mechanism of the bonding surface of a track slab and a mortar layer.
The current drawing device for researching the interface bonding performance has the following problems in the using process: in the test process, the bonding strength between the scale model test sample of the high-speed railway track plate and the drawing machine is possibly insufficient to pull the test sample, the scale test sample of the cubic track plate cannot be drawn, the test sample slips in the drawing process, and the test sample is locally damaged at a non-interface before being pulled and cracked in the drawing process.
SUMMERY OF THE UTILITY MODEL
The utility model provides a measuring device for track board and mortar layer normal direction adhesion properties, the accessible is planted the muscle in advance in high-speed railway track board scale model sample, paint the structural adhesive, three kinds of modes of tight sample of clamp with the curb plate provide the drawing force to the track board scale model sample of side form, the supply mode of dispersion drawing force is in order to prevent that track board scale sample from taking place local destruction before drawing the fracture of in-process combination department, the drawing force is enough and the sample does not take place to slide drawing the in-process, measurable track board and mortar layer bonding surface are drawing normal direction stress state and the interface displacement of in-process, and simultaneously, whole device structure is all accomplished through assembling, and convenient for transportation, not fragile, the part is removable.
The utility model discloses the following technical scheme of accessible realizes:
the utility model provides a measuring device for be used for track board and mortar layer normal direction adhesive property, includes and goes up anchor clamps and lower anchor clamps with sample axial complex, go up anchor clamps, lower anchor clamps and adopt the same structure, all be provided with the cavity that holds the sample tip, two the cavity suit is respectively at an tip of sample, and its side presss from both sides tight contact with the tip that corresponds, and its bottom surface links to each other with the tip that corresponds, and the one side relative with the bottom surface all is provided with the portion of drawing that links to each other with power application mechanism, power application mechanism is used for the portion of drawing of anchor clamps and lower anchor clamps of making progress exerts opposite direction's axial pull-out force simultaneously to test the normal direction adhesive property between the track board layer and the mortar layer of sample.
Furthermore, the cavity adopts the cube structure, including the bottom plate slide on the bottom plate and be provided with the curb plate of two sets of relative settings, two curb plates of relative setting all through threaded rod, nut cooperation, realize with the tight contact of clamp of sample tip, clamp force when providing the test, whole or partial and tip adhesive connection of bottom plate.
Further, two groups of side plates which are arranged oppositely are respectively defined as two first side plates and two second side plates, the two first side plates are connected with the front side and the rear side of the bottom plate in a sliding way, the two second side plates are connected with the left side and the right side of the bottom plate in a sliding way,
the bottom of the first side plate is provided with a plurality of inverted T-shaped chucks at intervals, two sides of the first side plate are provided with L-shaped avoiding openings, the L-shaped avoiding openings are used for providing a space for the second side plate to pass through, the inverted T-shaped chucks are matched with guide clamping grooves arranged at corresponding positions on the front side and the rear side of the bottom plate, the guide clamping grooves extend from the edge of the bottom plate to the central line, the vertical part of each inverted T-shaped chuck passes through the guide clamping grooves, the horizontal part of each inverted T-shaped chuck is clamped on the outer side of the bottom plate, the horizontal part of each inverted T-shaped chuck is provided with a first through hole for a threaded rod to pass through, the protruding part of each L-shaped avoiding opening is also provided with a second through hole for the threaded rod to pass through, and the two first threaded rods respectively pass through the first through holes of the two first side plates and are matched with nuts to realize front and rear clamping contact with a sample;
the bottom of the second side plate is provided with a through groove for the left side or the right side of the bottom plate to pass through, the top of the second side plate is matched with the L-shaped avoidance opening, the two sides of the second side plate are respectively provided with a third through hole and a fourth through hole for the threaded rod to pass through, and the two second threaded rods respectively pass through the third through holes and the fourth through holes of the two second side plates to be matched with nuts so as to realize the left-right clamping contact with the sample.
Furthermore, a cross plate is arranged on the bottom plate and is in adhesive connection with the end part of the sample, scale marks are arranged along four edges of the surface of the bottom plate, and an anti-skid layer in contact with the sample is arranged on the surface of the side plate.
Further, the track slab layer of sample and the connecting portion on mortar layer are provided with foil gage and artifical mark, the foil gage is used for detecting the displacement change between track slab layer and the mortar layer, artifical mark is used for providing image processing's accurate positioning mark.
The utility model discloses profitable technological effect lies in:
1. the device accessible is planted the muscle in advance in the sample, tight pressure, is paintd three kinds of modes of structural adhesive and is provided the die pull, and the die pull is sufficient, and dispersion die pull supply mode takes place local destruction in order to prevent track board scale sample before drawing the fracture of in-process junction, and the sample is drawing the difficult emergence of in-process and is slided, can select the service behavior of anchor clamps about according to concrete needs.
2. The whole device can be assembled and finished, parts are convenient to replace, and due to the fact that the drawing portion is connected with the bottom plate through the bolts, different drawing portions can be designed to adapt to different experimental machine clamps, and the applicability is wide.
3. The artificial target is continuously photographed through the pattern acquisition equipment, the interface displacement of the joint of the sample is calculated through an image displacement algorithm, and meanwhile, the interface displacement of the joint is visually reflected through the strain gauge, so that the phenomenon that displacement measurement is inaccurate due to the deformation of the drawing part in the drawing process can be avoided, and the positioning precision of the target positioning method based on composite positioning is enough.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is an exploded view of the overall structure of the present invention;
fig. 3 is an explosion schematic diagram of the upper clamp structure of the present invention;
fig. 4 is a schematic structural view of a first side plate of the present invention;
fig. 5 is a schematic structural view of a second side plate of the present invention;
the test piece testing device comprises a test piece 1, a test piece 2, an upper clamp 21, a bottom plate 211, a guide clamping groove 212, a drawing part 22, a first side plate 221, an inverted T-shaped clamping head 222, an L-shaped avoiding opening 23, a second side plate 231, a through groove 24, a first threaded rod 25, a second threaded rod 26, a cross plate 27, an L-shaped fixing piece 3, a lower clamp 4, a strain piece 5 and an artificial target.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided in connection with the accompanying drawings.
As shown in fig. 1-5, the utility model provides a measuring device for track board and mortar layer normal direction adhesive property, include with 1 axial complex of sample 2 and lower anchor clamps 3, should go up anchor clamps 2, lower anchor clamps 3 adopt the same structure, all be provided with the cavity that holds 1 tip of sample, these two cavities suit respectively at a tip of sample 1, its side presss from both sides tight contact with the tip that corresponds, its bottom surface links to each other with the tip that corresponds, the one side relative with the bottom surface all is provided with the portion of drawing that links to each other with power application mechanism, this power application mechanism is used for the portion of drawing of upwards anchor clamps 2 and lower anchor clamps 3 to exert opposite direction's axial pulling force simultaneously, thereby test sample 1's track board layer and mortar layer between the normal direction adhesive property. Therefore, the axial drawing force for testing is provided jointly through clamping contact of the side face of the cavity and the end part of the sample and connection of the bottom face of the cavity and the end part of the sample, meanwhile, the providing mode that the pre-planted bars are additionally arranged inside the sample to further disperse the drawing force is adopted, so that local damage before cracking of a joint in the drawing process is avoided, the testing stability is improved, and the application range of the testing device is enlarged.
Specifically, as shown in fig. 2 to 3, according to the combination mode of the actual track slab and the mortar layer, the sample 1 is made into a cubic structure, and correspondingly, the cavity also adopts a cubic structure, and includes a bottom plate 21, two sets of oppositely arranged side plates are slidably arranged on the bottom plate 21, and the two oppositely arranged side plates are matched through a threaded rod and a nut, so as to realize clamping contact with the end portion of the sample 1 and provide a clamping force during testing.
As shown in fig. 3, two sets of side plates which are arranged oppositely are respectively defined as two first side plates 22 and two second side plates 23, the two first side plates 22 are slidably connected with the front and back sides of the bottom plate 21, and the two second side plates 23 are slidably connected with the left and right sides of the bottom plate 21, as shown in fig. 4, a plurality of inverted T-shaped chucks 221 can be arranged at intervals at the bottom of the first side plate 22, and a connection part with the first side plate 22 forms a similar i-shaped structure, guide clamping grooves 211 are arranged at positions corresponding to the inverted T-shaped chucks 221 on the front and back sides of the bottom plate 21, the guide clamping grooves 211 extend from the edge of the bottom plate 21 to the center line, so that a neck part of the i-shaped structure, namely a vertical part of the inverted T-shaped chuck 221, passes through the guide clamping groove 211, so that the horizontal part thereof is clamped on the outer side of the bottom plate 21, thereby realizing the sliding connection between the first side plate 22 and the bottom plate 21, and simultaneously, in order to better match with the second side plate 23, two sides of the first side plate 22 are provided with L-shaped avoiding openings 222 for providing a space for the second side plate 23 to pass through which the second side plate 23, so that a first through hole is provided for the screw rod 22 to pass through which the first through hole of the first side plate, and a nut, and a first side plate 24 of the screw rod passes through which passes through the first side plate, and then, and a nut can pass through hole, and a first side plate 24, and a screw rod passes through the first side plate 24, and then the nut can pass through the first side plate 24, and then realize the first threaded rod, and the nut can pass through the nut, and a first threaded rod, and the nut can pass through the nut, and the nut can pass through the nut, and the threaded rod 1;
as shown in fig. 5, a through groove 231 for allowing the left side or the right side of the bottom plate 21 to pass through is arranged at the bottom of the second side plate 23, the top of the through groove is matched with the L-shaped avoiding opening 222, third through holes and fourth through holes for allowing threaded rods to pass through are respectively arranged at the two sides of the through groove 231, the through grooves 231 of the two side plates 23 are respectively sleeved at the left side and the right side of the bottom plate 21, the other parts of the through groove are matched with the L-shaped avoiding opening 222, then the through groove passes through the third through holes of the two second side plates 23 respectively by means of one second threaded rod 25, the other second threaded rod 25 passes through the fourth through holes of the two second side plates 23, and the end parts of the two threaded rods are matched with nuts to realize left-right clamping contact with the sample 1.
In order to increase the friction force, the surfaces of the first side plate 22 and the second side plate 23 are provided with anti-slip layers, such as rubber pads, which are in contact with the test sample 1. Meanwhile, scale marks are arranged along four edges of the surface of the bottom plate 21, so that clamping of the four side plates and the sample can be adjusted according to the scale marks, the sample is arranged at the center of the bottom plate 21 as far as possible, and front-back left-right deviation is avoided, so that axial drawing force can be uniformly applied to the sample, eccentric loading is prevented, and testing accuracy is improved.
Because the axial drawing force applied by the force applying mechanism is transmitted through the drawing part 212 connected with the bottom plate 21, all or part of the bottom plate 21 needs to be bonded with the end part of the sample 1, and structural glue can be coated at the joint of the bottom plate 21 and the sample 1 to ensure that the axial drawing force can be transmitted to the sample 1 as much as possible; when the parts are bonded, the cross plate 26 may be provided on the bottom plate 21, and the two are connected by a bolt, and the cross plate 26 is coated with a structural adhesive to realize the partial bonding with the end of the sample 1.
The drawing part 212 is disposed at the center of the bottom plate 21, and may be integrated with the bottom plate 21 or may be connected to the bottom plate 21 in an assembling manner, such as a threaded connection, for facilitating disassembly and maintenance.
In order to detect the displacement of a joint of a sample, a strain gauge 4 and an artificial target 5 are arranged at a connecting part of a track slab layer and a mortar layer of the sample 1, the strain gauge 4 is used for detecting the displacement change between the track slab layer and the mortar layer, and the artificial target 5 is used for providing an accurate positioning mark for image processing, so that the displacement detection is realized by adopting an image processing method.
In addition, in order to further stabilize the positions of the first side plate 22 and the second side plate 23 on the bottom plate 21, a plurality of long waist holes are arranged at corresponding positions of the bottom plate 21 and are symmetrically distributed, after the positions of the first side plate 22 and the second side plate 23 on the bottom plate 21 are determined, the positions of the first side plate 22 and the second side plate 23 are reinforced by the aid of the L-shaped fixing piece 27, the bolts and the long waist holes in a matched mode, namely one side of the L-shaped fixing piece 27 abuts against the first side plate 22 and the second side plate 23, the other side of the L-shaped fixing piece 27 abuts against the bottom plate 21, and then the L-shaped fixing piece 27, the long waist holes and the long waist holes are fixed together by means of bolts penetrating through the L-shaped fixing piece 27, the long waist holes and the long waist holes in a matched mode.
Utilize the utility model discloses a when testing arrangement tests, concrete process is as follows:
step 1: the sample 1 is placed on the ground, the cross plate 26 is placed on the bottom plate 21, and the position of the cross plate 26 is fixed by a bolt.
Step 2: a proper amount of structural adhesive is coated on the cross plate 26, then the base plate 21 coated with the structural adhesive is covered on the sample 1, and the position of the sample 1 on the base plate 21 is adjusted, so that the sample 1 is prevented from being eccentrically loaded at the geometric center of the base plate 21.
And step 3: the inverted T-shaped chucks 221 of the two first side plates 22 are inserted into the guide clamping grooves 211 on the front side and the rear side of the bottom plate 21, the through grooves of the two second side plates 23 are inserted into the left side and the right side of the bottom plate 21, and the positions of the first side plates 22 and the second side plates 23 are adjusted through the scale marks on the bottom plate 21 so as to ensure that the cube sample cannot deviate from the geometric center of the bottom plate 21 when the first threaded rod 24 and the second threaded rod 25 are screwed.
And 4, step 4: the first threaded rod 24 and the second threaded rod 25 respectively penetrate through the through holes at the corresponding positions of the two first side plates 22 and the two second side plates 23, and the nuts are screwed by a wrench to provide tightening pressure, so that the four side plates tightly clamp the sample 1.
And 5: after the adjustment to the proper position, the L-shaped fixing sheet 27 is used to fix the position of the first side plate 22 and the second side plate 23.
It should be noted that: because the structural adhesive needs about 15 minutes for solidification, the position of the sample on the bottom plate cannot be adjusted because the structural adhesive is solidified in the operation process.
Step 6: because the device is symmetrical up and down, the assembled parts are placed upside down, and the other side is operated in the same way.
And 7: the assembled jig and sample are lifted and loaded into the drawing section 212 at the center of the base plate 21.
And 8: and starting a force applying mechanism such as a universal testing machine, adjusting the universal testing machine chuck to a proper height, loosening the universal testing machine chuck, inserting the drawing part 212 at the lower end into the universal testing machine chuck, screwing the chuck to clamp the drawing part 212, aligning the drawing part 212 drawn at the upper end, and then inserting the drawing part 212 drawn at the upper end into the universal testing machine chuck for clamping.
And step 9: the strain gauge 4 was attached to the joint of the sample 1, and the specific attachment position is shown in fig. 1.
Step 10: after the strain gauge 4 is pasted, the strain gauge is connected with a data acquisition instrument, the strain gauge can be lightly pressed by hand to observe whether the strain gauge works normally, then the artificial targets 5 are symmetrically pasted on the upper side and the lower side of the joint of the sample 1 respectively, and the pasting positions are shown in figure 1.
Step 11: the image acquisition equipment is fixed by the support at a distance of 1.5m from the universal testing machine, the position of the support is not required to be moved in the image acquisition process, and the height of the support ensures that the image acquisition equipment can acquire a complete target image.
Step 12: after the method is prepared, a universal testing machine can be started to provide normal tension, the displacement of the combination part of the sample 1 in the drawing process is detected, the target is initially positioned by a DDIS method based on one-way nearest neighbor matching, the calculation difficulty in the positioning of the target can be obviously reduced, the accurate positioning of the coordinates of the target is realized by using a circle fitting algorithm, then the position change of the sample bonding surface in the current image and the sample bonding surface in the initial time acquisition image is compared to obtain the interface displacement, the target can be a red circular pattern sprayed on or a red circular patch, and finally the interlayer normal stress state of the sample when the sample is damaged by pulling is observed through a strain gauge and a data acquisition instrument.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these embodiments are merely illustrative and that various changes and modifications may be made therein without departing from the principles and spirit of the invention, and therefore the scope of the invention is defined by the appended claims.
Claims (4)
1. A measuring device for normal bonding performance of a track plate and a mortar layer is characterized in that: include with sample axial complex anchor clamps and lower anchor clamps, go up anchor clamps, lower anchor clamps adopt the same structure, all are provided with the cavity that holds the sample tip, two the cavity suit is respectively at an tip of sample, its side and the tip clamping contact that corresponds, and its bottom surface links to each other with the tip that corresponds, and the one side relative with the bottom surface all is provided with the portion of drawing that links to each other with power application mechanism, power application mechanism is used for the axial pull-out force of opposite direction is applyed simultaneously to the portion of drawing of anchor clamps and lower anchor clamps that makes progress to test the normal direction adhesive property between the track slab layer and the mortar layer of sample.
2. The measuring device for the normal bonding performance of the track plate and the mortar layer according to claim 1, wherein: the cavity adopts the square body structure, including the bottom plate slide on the bottom plate and be provided with the curb plate of two sets of relative settings, two curb plates of relative setting all through threaded rod, nut cooperation, realize with the tight contact of clamp of sample tip, the clamp force when providing the test, whole or part and the tip bonding connection of bottom plate.
3. The measuring device for the normal bonding performance of the track plate and the mortar layer according to claim 2, wherein: two groups of oppositely arranged side plates are respectively defined as two first side plates and two second side plates, the two first side plates are connected with the front side and the rear side of the bottom plate in a sliding way, the two second side plates are connected with the left side and the right side of the bottom plate in a sliding way,
the bottom of the first side plate is provided with a plurality of inverted T-shaped chucks at intervals, two sides of the first side plate are provided with L-shaped avoiding openings, the L-shaped avoiding openings are used for providing a space for the second side plate to pass through, the inverted T-shaped chucks are matched with guide clamping grooves arranged at corresponding positions on the front side and the rear side of the bottom plate, the guide clamping grooves extend from the edge of the bottom plate to the central line, the vertical part of each inverted T-shaped chuck passes through the guide clamping grooves, the horizontal part of each inverted T-shaped chuck is clamped on the outer side of the bottom plate, the horizontal part of each inverted T-shaped chuck is provided with a first through hole for a threaded rod to pass through, the protruding part of each L-shaped avoiding opening is also provided with a second through hole for the threaded rod to pass through, and the two first threaded rods respectively pass through the first through holes of the two first side plates and are matched with nuts to realize front and rear clamping contact with a sample;
the bottom of the second side plate is provided with a through groove for the left side or the right side of the bottom plate to pass through, the top of the second side plate is matched with the L-shaped avoidance opening, the two sides of the second side plate are respectively provided with a third through hole and a fourth through hole for the threaded rod to pass through, and the two second threaded rods respectively pass through the third through holes and the fourth through holes of the two second side plates to be matched with nuts so as to realize the left-right clamping contact with the sample.
4. The measuring device for the normal bonding property of the track plate and the mortar layer according to claim 2, wherein: the bottom plate is provided with a cross plate, the cross plate is connected with the end part of the sample in an adhesion mode, scale marks are arranged on four edges of the surface of the bottom plate, and the surface of the side plate is provided with an anti-skid layer which is in contact with the sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123220073.6U CN217605488U (en) | 2021-12-21 | 2021-12-21 | Device for measuring normal bonding performance of track plate and mortar layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123220073.6U CN217605488U (en) | 2021-12-21 | 2021-12-21 | Device for measuring normal bonding performance of track plate and mortar layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217605488U true CN217605488U (en) | 2022-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123220073.6U Active CN217605488U (en) | 2021-12-21 | 2021-12-21 | Device for measuring normal bonding performance of track plate and mortar layer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217605488U (en) |
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2021
- 2021-12-21 CN CN202123220073.6U patent/CN217605488U/en active Active
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