Fatigue durability testing device for purline assembly

Abstract

The utility model discloses a fatigue durability testing device for a purline assembly, which comprises a power device, the power device comprises a clamp driven by an electric cylinder, the clamp is connected to a push rod of the electric cylinder, the clamp is matched with a purline on the purline assembly and is provided with a bayonet matched with the outline of the purline, and the purline assembly comprises a main beam and the purline. Wherein the purline is fixedly connected to the main beam through the purline mounting piece and the U-shaped bolt; the pressure sensor is arranged between the clamp and the push rod and used for detecting the value of pressing vibration force borne by the purline in the operation process; and the controller is in communication connection with the power device so as to drive the electric cylinder to drive the clamp to operate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building detection, and particularly relates to a fatigue durability testing device for purlin assemblies. BACKGROUND

[0002] In the past, purlin fatigue durability testing is generally carried out by using a pneumatic cylinder, which may result in unstable test force, too small upper limit of force, failure to meet the requirement of large force for purlins, inaccurate displacement control, easy damage to purlins, serious influence on test results, and low test efficiency.

[0003] Therefore, in view of the above technical problems, it is necessary to provide a fatigue durability testing device for purlin assemblies.

[0004] The information disclosed in this section of the background art is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. SUMMARY

[0005] The utility model aims at providing a fatigue durability testing device for purlin assemblies.

[0006] In order to achieve the above-mentioned purpose, the technical scheme provided by the utility model in one embodiment is as follows:

[0007] The fatigue durability testing device for purlin assemblies comprises

[0008] The power device comprises a clamp driven by an electric cylinder, the clamp is connected to a push rod of the electric cylinder, the clamp is matched with a purlin on the purlin assembly and has a bayonet fitting suitable for the profile of the purlin, wherein the purlin assembly comprises a main beam and a purlin, and the purlin is fixedly connected to the main beam through a purlin mounting and a U-shaped bolt;

[0009] The pressure sensor is arranged between the clamp and the push rod and is used for detecting the pressing vibration force value borne by the purlin during operation;

[0010] The controller is communicatively connected to the power device to drive the electric cylinder to drive the clamp to operate.

[0011] In one or more embodiments of the utility model.

[0012] In one or more embodiments of the utility model, the utility model further comprises a rack, the rack comprises a base, a support part arranged on the base, and an upper truss adjustably arranged on the upper end of the support part in the height direction of the support part, and the power device is connected to the upper truss.

[0013] In one or more embodiments of the utility model, the upper end of the support part is provided with an external thread structure, the connecting position of the upper truss and the support part is provided with a through hole in cooperation, the upper truss is fixed through two groups of nuts matched with the external thread structure, and each group of nuts is cooperatively limited on both sides of the upper truss through the external thread structure.

[0014] In one or more embodiments of the utility model, the base at least includes two base fixing blocks connected to the lower end of the support part correspondingly.

[0015] In one or more embodiments of the utility model, the base fixing block includes a counterbore with an internal thread, the lower end of the support part includes a fastening thread engaged with the internal thread, and the support part and the base fixing block are connected through the fastening thread and the counterbore.

[0016] In one or more embodiments of the utility model, the controller includes a control cabinet and a servo driver arranged on the control cabinet, and the servo driver is communicatively connected with the servo motor of the electric cylinder.

[0017] In one or more embodiments of the utility model, the lower end of the push rod is further formed with a buffer connecting structure, and the buffer connecting structure is provided between the lower end of the push rod and the pressure sensor to provide a buffer stroke consistent with the stroke direction of the push rod.

[0018] In one or more embodiments of the utility model, the buffer connecting structure includes an elastic rubber body, the elastic rubber body includes a first column, a second column and a protruding disc formed therebetween, the outer diameter of the protruding disc is greater than the maximum diameter of the first column and the second column, the first column is cooperatively nested in the first groove on the lower end surface of the push rod, and the second column is cooperatively nested in the second groove on the upper end surface of the sensor.

[0019] In one or more embodiments of the utility model, a plurality of through structures are uniformly formed in the elastic rubber body along the stroke direction of the push rod. Preferably, the through structures are arranged around the center line of the column. More preferably, the through structures are three-prism-shaped through holes around the center line of the column, and the inner diameter is not greater than 1 / 5 of the minimum outer diameter of the elastic rubber body.

[0020] Compared with the prior art, the fatigue durability testing device of the purline assembly can accurately and effectively test the fatigue durability of the purline assembly, the electric cylinder and the speed reducer are driven by the servo drive, and the pressure sensor is added to accurately control the purline pressing vibration frequency, the purline displacement, the purline pressing vibration rate and the purline pressing vibration force value, which is flexible, controllable, convenient, accurate and efficient. Especially when the purline needs to be tested under a large force value, the electric cylinder and the speed reducer are added with the force value sensor to effectively ensure accurate control under a large force value, and the position of the force value sensor is moved to press and vibrate the purline at different points to meet the multi-directional pressing vibration test of the purline. The servo drive control cabinet can effectively adjust the purline pressing vibration frequency and the purline pressing vibration rate, and has higher flexibility, higher test efficiency, time saving and quality guarantee to meet the requirements of customers. The electronic display screen of the control cabinet can be used to observe the purline pressing vibration frequency, the purline displacement, the purline pressing vibration rate and the purline pressing vibration force value in real time, and timely follow-up and monitoring of the sample state change in each time period. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments described in the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0022] Figure 1 It is a structural schematic view of the fatigue durability testing device in an embodiment of the present application.

[0023] Figure 2 It is a structural schematic view of the fatigue durability testing device in an embodiment of the present application. Figure 1 It is a side view.

[0024] Among them: 1. Electric cylinder 2. Speed reducer 3. Servo driver 4. Pressure sensor 5. Control cabinet 6. Purline assembly 7. Clamps 8. Electric cylinder push rod 9. Base fixing block 10. Upper truss 11. Support part 12. Buffer connection structure DETAILED DESCRIPTION

[0025] In order to make the person skilled in the art better understand the technical scheme in the present application, the technical scheme in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creating any creative labor should belong to the scope of protection of the present application.

[0026] In the embodiments including but not limited to the following, the fatigue durability test device of the purlin assembly can be used to achieve the following purposes:

[0027] 1) Electric cylinder: power source, through energization operation, to realize purlin pressing vibration.

[0028] 2) Reducer: speed reduction and torque increase, increase torque to increase electric cylinder force value.

[0029] 3) Servo driver: control electric cylinder and reducer, accurately realize displacement control, force value control, speed control.

[0030] 4) Pressure sensor: control purlin pressing vibration force value.

[0031] 5) Control cabinet: set parameters such as displacement, force value, speed, cycle number, etc.

[0032] 6) Purlin assembly: purlin, purlin mounting, U-shaped bolt, main beam.

[0033] 7) Chuck: connected with force value sensor and clamping purlin.

[0034] 8) Electric cylinder push rod: push force value sensor to contact purlin, realize pressure and displacement requirements.

[0035] 9) Base fixing block: support the device by fixing the base fixing block.

[0036] 10) Limit adjusting nut: adjust the distance between the electric cylinder and the purlin.

[0037] 11) Support part: support the electric cylinder reducer.

[0038] As Figures 1-2 shown, the fatigue durability test device of the purlin assembly in an embodiment of the utility model includes

[0039] Power device, including clamp 7 driven by electric cylinder 1, clamp 7 is connected to push rod 8 of electric cylinder 1, clamp 7 matches purlin on purlin assembly 6 and has bayonet fitting with the profile of purlin, wherein purlin assembly 6 includes main beam and purlin, wherein purlin is fixedly connected to main beam by purlin mounting and U-shaped bolt.Electric cylinder 1 is also connected with reducer 2, and the output end of reducer 2 is drivingly connected with push rod 8, so that the driving motor of electric cylinder 1 increases the torsion after speed reduction, thereby improving the force application ability in the stroke direction of push rod 8.

[0040] The pressure sensor 4 is arranged between the clamp 7 and the push rod 8, and is used to detect the pressing vibration force value borne by the purlin during the operation. During the detection, the clamp 7 clamps the purlin on the purlin assembly 6 to be detected, and can be in abutment with the ground or the table through the main beam. The push rod 8 applies pressure to the clamp 7, so as to form the detection of the purlin assembly 6. The pressure sensor 4 collects and feeds back the detection state to the controller. After receiving the instruction input by the control cabinet 5, the controller controls the servo driver 3 to send a control signal to the power device to drive the electric cylinder 1 to drive the clamp 7 to operate, and the controller can have an operation interface / panel and a display interface.

[0041] In another embodiment, in order to fix the above-mentioned functional device, a rack for limiting the functional device is further included. The rack includes a base, a support part 11 arranged on the base, and an upper truss 10 arranged on the upper end of the support part 11 in the height direction of the support part 11 (which can be in a rod or column structure), and the power device is connected to the upper truss 10. Further, the upper end (here, the upper end does not only refer to the end, but can also refer to a part adjacent to the upper end) of the support part 11 is provided with an external thread structure, the connection position of the upper truss 10 and the support part 11 is provided with a through hole in a matched manner, and the upper truss 10 is fixed by two groups of nuts matched with the external thread structure. Each group of nuts is limited on both sides of the upper truss 10 by the matched external thread structure. By adjusting the position of the nuts, the limited position of the truss can be adjusted, so as to realize the height adjustment of the clamp 7, and meet the detection requirements of purlin assemblies 6 of different heights. At this time, since the truss is replaceable, different trusses can be used to meet the detection requirements of purlin assemblies 6 of different widths.

[0042] In another embodiment, the base includes at least two base fixing blocks 9 connected to the lower end of the support part 11 correspondingly. The base fixing block 9 includes a counterbore with an internal thread, and the lower end of the support part 11 includes a fastening thread engaged with the internal thread. The support part 11 and the base fixing block 9 are connected through the fastening thread and the counterbore. The flexibly arranged base fixing block 9 meets the detection requirements of purlin assemblies 6 of different sizes.

[0043] In another embodiment, the lower end of the push rod 8 further forms a buffer connection structure 12 between the lower end of the push rod 8 and the pressure sensor 4 to provide a buffer stroke consistent with the stroke direction of the push rod 8. Through the buffer connection structure, a certain buffer can be provided for the push rod 8 during the detection of the downward pressing and especially the vibration process at a certain frequency, so as to avoid the rigid collision between the push rod 8 and the sensor at a high frequency, prolong the service life of the equipment, and be beneficial to noise reduction.

[0044] In yet another embodiment, the buffering connecting structure 12 comprises an elastic rubber body, which comprises a first column, a second column and a protruding disc formed between the two, the outer diameter of the protruding disc is greater than the maximum diameter of the first column and the second column, the first column is fittedly nested in the first groove of the lower end surface of the push rod 8, and the second column is fittedly nested in the second groove of the upper end surface of the sensor. Further, a plurality of through structures are uniformly formed in the elastic rubber body along the stroke direction of the push rod 8. Preferably, the through structures are arranged around the center line of the column. More preferably, the through structures are prismatic through holes arranged around the center line of the column, and the inner diameter of the prismatic through holes is not greater than 1 / 5 of the minimum outer diameter of the elastic rubber body, so as to provide a certain degree of deformation while limiting excessive deformation, thereby maintaining the response accuracy of the sensor force measurement.

[0045] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the claims. Any reference numerals in the claims should not be considered as limiting the claims to which they relate.

[0046] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A fatigue endurance testing apparatus for a purlin assembly, characterized by, The utility model relates to a purlin assembly fixing device, including Power device, it includes by electric jar drive clamp, the clamp is connected to the push rod of electric jar, the clamp matches purlin on purlin assembly it has with the contour of purlin adapts to bayonet, wherein purlin assembly includes main beam and purlin, and wherein purlin is fixedly connected to main beam through purlin mounting and U bolt; Pressure sensor, it is arranged between the clamp and push rod, is used for detecting the press vibration force value that purlin bears in the process of operation; Controller, communication connection power device to drive electric jar to drive clamp to operate.

2. The apparatus for fatigue endurance testing of a purlin assembly of claim 1, wherein, The electric jar is also connected with a speed reducer, and the output end of the speed reducer drives the push rod.

3. The fatigue endurance testing device for a purlin assembly according to claim 1 or 2, characterized in that, It also includes a rack, the rack includes a base, a support part arranged on the base, and an upper truss adjustably arranged on the upper end of the support part in the height direction of the support part, and the power device is connected and arranged to the upper truss.

4. The apparatus for fatigue endurance testing of purlin assemblies of claim 3, wherein, The upper end of the support part is provided with an external thread structure, the upper truss is provided with a through hole in cooperation with the connection position of the support part, and the upper truss is fixed by two groups of nuts matched with the external thread structure. Each group of nuts is limited on both sides of the upper truss by the external thread structure.

5. The apparatus for fatigue endurance testing of purlin assemblies of claim 3, wherein, The base includes at least two base fixing blocks connected to the lower end of the support part correspondingly.

6. The apparatus for fatigue endurance testing of a purlin assembly of claim 5, wherein, The base fixing block includes a counterbore with an internal thread, and the lower end of the support part includes a fastening thread engaged with the internal thread, and the support part and the base fixing block are connected by the fastening thread and the counterbore.

7. The apparatus for fatigue endurance testing of a purlin assembly of claim 1, wherein, The controller includes a control cabinet and a servo driver arranged on the control cabinet, and the servo driver is communicatively connected to the servo motor of the electric jar.

8. The apparatus for fatigue endurance testing of a purlin assembly of claim 1, wherein, The lower end of the push rod is also formed with a buffer connection structure, which is provided between the lower end of the push rod and the pressure sensor to provide a buffer stroke consistent with the stroke direction of the push rod.

9. The purlin assembly fatigue endurance testing apparatus of claim 8, wherein, The buffer connection structure includes an elastic rubber body, the elastic rubber body includes a first column, a second column, and a protruding disc formed between the two, the outer diameter of the protruding disc is greater than the maximum diameter of the first column and the second column, the first column is nested in the first groove on the lower end surface of the push rod, and the second column is nested in the second groove on the upper end surface of the sensor.

10. The purlin assembly fatigue endurance testing apparatus of claim 9, wherein, A plurality of through structures are uniformly formed in the elastic rubber body along the stroke direction of the push rod.

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