Drop weight testing machine
By using an electromagnet to adsorb the drop hammer and the limiting mechanism to fix the pipe in the hammer test machine, the problems of steel cable rolling and pipe shaking in traditional equipment are solved, and the accuracy and stability of the detection data are improved.
Patent Information
- Application Number
- CN202420048669.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-09
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-01-09
AI Technical Summary
The drop hammer of the traditional hammer test machine is directly fixed to the steel cable, which is prone to affect the impact force due to the coiling of the steel cable, and the lack of a limiting mechanism causes the pipe to shake, affecting the accuracy of the measurement data.
The electromagnet is used to absorb the hammer and avoid the steel cable being coiled, and the pipe is fixed through the limiting mechanism to ensure its stability. The gravity sensor is used to record the impact of the hammer and improve the accuracy of the detection data.
It effectively avoids the phenomenon of steel cable rolling, ensures the stability of the pipe, and improves the accuracy and reliability of the inspection data.
Smart Images
Figure CN222259022U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipe testing, in particular to a drop weight testing machine. Background Art
[0002] The drop weight impact tester is a device widely used in the field of material mechanics testing. It is mainly used to measure the force and deformation that a material can withstand when it is impacted. It is suitable for the determination of the external impact resistance of various pipes (PVC-U water supply pipes, sewage pipes, low-pressure water supply pipes, low-pressure water delivery pipes, core foam pipes, double-wall corrugated pipes, PE water supply pipes) and plates, and is also suitable for hard plastic plates.
[0003] The drop weight of a traditional drop weight tester is directly fixed to a steel cable. When the steel cable is bent during falling, the impact force of the drop weight will be affected. Secondly, the traditional drop weight tester does not have a limiting mechanism, so the pipe is prone to shaking when placed on the test bench, thus affecting the accuracy of the measurement data. Utility Model Content
[0004] The purpose of the utility model is to provide a drop hammer testing machine, which has the advantages of avoiding the occurrence of steel cable curling by adsorbing the drop hammer through an electromagnet, and is provided with a limit mechanism to limit the pipe to avoid its shaking, thereby improving the accuracy of the detection data and solving the problems mentioned in the background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a drop hammer testing machine, including a base, a limit mechanism and a control box, a test bench is installed in the middle of the upper surface of the base, two limit mechanisms are symmetrically installed on the left and right sides of the test bench, four columns are installed in a rectangular array at the four corners of the upper surface of the base, a top plate is installed on the top of the four columns, two light rods are symmetrically installed in the middle of the lower surface of the top plate, telescopic rods are inserted into the two light rods, a winding drum is installed in the middle of the top of the top plate, a lifting motor is installed on the left side, the output shaft of the lifting motor is connected to the winding drum shaft through a flange, a steel wire is wound on the winding drum, an electromagnet is fixed to the other end of the steel wire, two fixed blocks are symmetrically installed on the left and right sides of the electromagnet, the two fixed blocks are slidably installed with the two light rods respectively, and a drop hammer is adsorbed on the bottom of the electromagnet.
[0006] Preferably, four footings are installed at the four corners of the bottom of the base in a rectangular array. By providing the four footings, the base can be stably supported.
[0007] Preferably, a square groove is provided on the upper surface of the test bench, gravity sensors are installed at the four corners of the bottom of the square groove, and a support plate is installed at the limit position, and the support plate is fixed on the four gravity sensors. By setting the gravity sensor, the data of the impact force of the falling hammer can be transmitted to the display screen of the control box.
[0008] Preferably, the limit mechanism is composed of a limit seat, a limit screw, a limit rod, a moving block and a knob. A rectangular groove is provided on the upper surface of the limit seat. A limit screw is rotatably installed in the rectangular groove. Two moving blocks are installed in the limit position. One end of the limit screw passes through the limit seat and a knob is installed. The two moving blocks are spirally connected to the limit screw. The limit rod is installed on the top of the two moving blocks. By setting the limit mechanism, the pipe fitting can be placed in the center of the test bench.
[0009] Preferably, the control box is installed outside the right column of the front side, and the control box is electrically connected to the electromagnet and the lifting motor, and is connected to the gravity sensor signal transmission. By setting the control box, it is convenient to carry out the overall control of the drop hammer test.
[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0011] When the utility model is used, the pipe is placed on the support plate between the two limit rods of the two limit mechanisms, and the two knobs are turned to move the two groups of limit rods toward the middle to limit the pipe. Then the lifting motor is started through the control box, and the lifting motor drives the winding drum to rotate to reel the steel wire and drives the drop hammer to rise. It stops when it rises to a certain height, and then the electromagnet is powered off. The drop hammer falls straight down to hit the pipe. The impact force during the hitting is transmitted to the display screen of the control box by the gravity sensor, thereby achieving the situation that the steel wire is prevented from being rolled up by the electromagnet attracting the drop hammer. A limit mechanism is provided to limit the pipe to prevent it from shaking, thereby improving the accuracy of the detection data. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the structure of the utility model;
[0013] Figure 2 It is a schematic diagram of the limiting mechanism of the utility model.
[0014] In the figure: 1. base; 2. test bench; 3. square groove; 4. support plate; 5. gravity sensor; 6. foot; 7. column; 8. drop weight; 9. fixed block; 10. electromagnet; 11. telescopic rod; 12. light rod; 13. top plate; 14. lifting motor; 15. take-up drum; 16. steel wire; 17. control box; 18. limit seat; 19. rectangular groove; 20. limit screw; 21. limit rod; 22. moving block; 23. knob. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0016] See also Figure 1 to Figure 2 The utility model provides a technical solution for a drop hammer tester: a drop hammer tester, comprising a base 1, a limit mechanism and a control box 17, four feet 6 are installed in a rectangular array at the four corners of the bottom end of the base 1, a test bench 2 is installed in the middle of the upper surface of the base 1, a square groove 3 is opened on the upper surface of the test bench 2, gravity sensors 5 are installed at the four corners of the bottom of the square groove 3, and a support plate 4 is installed at the limit, and the support plate 4 is fixed on the four gravity sensors 5, and two limit mechanisms are symmetrically installed on the left and right sides of the test bench 2, and the limit mechanism is composed of a limit seat 18, a limit screw rod 20, a limit rod 21, a moving block 22 and a knob 23, and the limit seat 18 A rectangular groove 19 is provided on the upper surface, in which a limit screw 20 is rotatably installed, and two moving blocks 22 are installed for limiting. One end of the limit screw 20 passes through the limit seat 18 and is installed with a knob 23. The two moving blocks 22 are spirally connected with the limit screw 20, and a limit rod 21 is installed on the top of the two moving blocks 22. When in use, the pipe is placed on the support plate 4 between the two limit rods 21 of the two limit mechanisms, and the two knobs 23 are rotated. The rotation of the two knobs 23 drives the two limit screws 20 to rotate, and the rotation of the two limit screws 20 drives the two groups of limit rods 21 to move toward the middle to limit the pipe to prevent the pipe from shaking.
[0017] Four columns 7 are installed in a rectangular array at the four corners of the upper surface of the base 1, a top plate 13 is installed on the top of the four columns 7, two light rods 12 are symmetrically installed in the middle of the lower surface of the top plate 13, and a telescopic rod 11 is inserted and installed inside the two light rods 12. A winding drum 15 is installed in the middle of the top of the top plate 13, and a lifting motor 14 is installed on the left side. The output shaft of the lifting motor 14 is connected to the rotating shaft of the winding drum 15 through a flange. A steel wire 16 is wound on the winding drum 15, and an electromagnet 10 is fixed to the other end of the steel wire 16. The electromagnet 1 0 Two fixed blocks 9 are symmetrically installed on the left and right sides, and the two fixed blocks 9 are slidably installed with the two polished rods 12 respectively. A drop hammer 8 is adsorbed on the bottom of the electromagnet 10; the lifting motor 14 is started through the control box 17, and the lifting motor 14 drives the reel 15 to rotate to reel the steel wire 16 and drives the drop hammer 8 to rise, and stops when it rises to a certain height, and then the electromagnet 10 is powered off, and the drop hammer 8 falls straight down to hit the pipe, and the impact force during the hitting is transmitted to the display screen of the control box 17 by the gravity sensor 5. The control box 17 is installed on the outside of the right column 7 on the front side, and the control box 17 is electrically connected to the electromagnet 10 and the lifting motor 14, and is connected to the gravity sensor 5 for signal transmission.
[0018] All motors of the utility model are designed with small servo motors - model 14HS2408. This model of motor is only used as a reference for personnel in the relevant technical field. Personnel in the relevant technical field can select motors with the same parameters and functions for installation, debugging and use according to actual production needs. This utility model will not elaborate on this.
[0019] When the utility model is used, the pipe is placed on the support plate 4 between the two limit rods 21 of the two limit mechanisms, and the two knobs 23 are turned. The rotation of the two knobs 23 drives the two limit screws 20 to rotate. The rotation of the two limit screws 20 drives the two groups of limit rods 21 to move toward the middle to limit the pipe. Then, the lifting motor 14 is started through the control box 17. The lifting motor 14 drives the winding drum 15 to rotate to wind up the steel wire 16 and drive the drop hammer 8 to rise. It stops when it rises to a certain height, and then the electromagnet 10 is powered off. The drop hammer 8 falls straight down to hit the pipe. The impact force during the hitting is transmitted to the display screen of the control box 17 by the gravity sensor 5.
[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A drop weight testing machine, comprising a base (1), a limit mechanism and a control box (17), characterized in that: A test bench (2) is installed in the middle of the upper surface of the base (1), and two limit mechanisms are symmetrically installed on the left and right sides of the test bench (2). Four columns (7) are installed in a rectangular array at the four corners of the upper surface of the base (1), and a top plate (13) is installed on the top of the four columns (7). Two light rods (12) are symmetrically installed in the middle of the lower surface of the top plate (13), and telescopic rods (11) are inserted and installed inside the two light rods (12). A winding drum (15) is installed in the middle of the top of the top plate (13), and a lifting motor (14) is installed on the left side. The output shaft of the lifting motor (14) is connected to the rotating shaft of the winding drum (15) through a flange. A steel wire (16) is wound on the winding drum (15), and an electromagnet (10) is fixed to the other end of the steel wire (16). Two fixed blocks (9) are symmetrically installed on the left and right sides of the electromagnet (10), and the two fixed blocks (9) are respectively slidably installed with the two light rods (12), and a drop hammer (8) is adsorbed on the bottom of the electromagnet (10).
2. A drop weight testing machine according to claim 1, characterized in that: Four footings (6) are installed in a rectangular array at the four corners of the bottom end of the base (1).
3. A drop weight testing machine according to claim 1, characterized in that: The upper surface of the test bench (2) is provided with a square groove (3), the four corners of the bottom of the square groove (3) are provided with gravity sensors (5), and a support plate (4) is provided for limiting the position, and the support plate (4) is fixed on the four gravity sensors (5).
4. A drop weight testing machine according to claim 1, characterized in that: The limiting mechanism is composed of a limiting seat (18), a limiting screw rod (20), a limiting rod (21), a moving block (22) and a knob (23); a rectangular groove (19) is provided on the upper surface of the limiting seat (18); a limiting screw rod (20) is rotatably installed in the rectangular groove (19); two moving blocks (22) are installed in the limiting position; one end of the limiting screw rod (20) passes through the limiting seat (18) and is installed with a knob (23); the two moving blocks (22) are spirally connected to the limiting screw rod (20); and the limiting rod (21) is installed on the top of the two moving blocks (22).
5. A drop weight testing machine according to claim 1, characterized in that: The control box (17) is installed at the outer side of the front right column (7). The control box (17) is electrically connected to the electromagnet (10) and the lifting motor (14), and is connected to the gravity sensor (5) for signal transmission.