A relaxation testing machine with protective function
By setting up a protective cover, heating device and exhaust system on the relaxation test machine, and sliding reinforcement frame on the guide rod, the micro-deformation and lack of protection of the guide rod of the existing relaxation test machine are solved, and safer and more accurate experimental testing is achieved.
Patent Information
- Application Number
- CN202420775557.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-04-16
AI Technical Summary
The existing relaxation test machines have problems with micro-deformation of the guide rod and the inaccurate measurement data, and the lack of protective structures may cause harm to the experimenters.
A relaxation test machine with protective function was designed, using a protective cover to cover the test surface, a heating device and an exhaust system were set up to accommodate tests at different temperatures, and a reinforcement frame was slided on the guide rod to prevent micro-deformation.
The protective cover avoids the danger of the steel wire break splash to the experimenter, ensuring the safety of the experiment; the heating device and exhaust system expand the test temperature range, and the guide rod reinforcement frame improves the accuracy of the measurement data.
Smart Images
Figure CN222748425U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tensile stress relaxation testing machines, and in particular relates to a relaxation testing machine with a protective function. Background Art
[0002] In the construction industry, prestressed steel is a very important metal building material with a wide range of applications. The stress relaxation testing machine is a special device for stress relaxation testing of high-strength steel wire, PC steel rod, steel strand and other steel materials used in construction projects. It can perform tensile loading on steel at a certain temperature. As time goes by, the automatic load reduction mechanism removes part of the load to keep the deformation constant, measure the stress reduction value over time, and draw a relaxation curve.
[0003] The relaxation testing machines in the prior art have the following disadvantages when in use: 1. Since the guide rod on the testing machine is relatively long, the guide rod is prone to micro-deformation or micro-displacement during measurement, resulting in inaccurate measurement data and causing trouble for subsequent work; 2. Most testing machines do not have a protective structure on the surface. During the experiment, as metal materials such as steel wires and steel strands break, the broken ends are likely to splash around, which may cause certain physical injuries to the experimenters.
[0004] In view of this, we propose a new relaxation testing machine. Utility Model Content
[0005] The purpose of this utility model is to provide a relaxation testing machine with a protective function in view of the shortcomings of the prior art. The specific scheme is as follows:
[0006] A relaxation tester with a protective function comprises a frame, wherein the frame is provided with a fixing frame and a machine body for testing the stress relaxation of a steel strand, a plurality of guide rods are arranged in parallel between the fixing frame and the machine body, a plurality of reinforcing frames are slidably arranged on the plurality of guide rods, and the reinforcing frames are fixed together with the guide rods by positioning bolts; a protective cover is rotatably arranged on the frame, a notch for the machine body is arranged on the protective cover, a heating device is also arranged on the protective cover, the outlet of the heating device is connected with the air inlet of an exhaust pump, the air outlet of the exhaust pump is communicated with the exhaust pipe arranged in the protective cover through an air delivery pipe, the exhaust pipe is provided with a strip exhaust port extending along its axis, an exhaust port is arranged on the top of the protective cover, and the exhaust port is connected with the inlet of the heating device through a pipe joint; a fixing ear is arranged on the protective cover, a fixing bolt is threaded through the fixing ear, and a positioning screw hole corresponding to the fixing bolt is arranged on the frame; a temperature sensor is also arranged on the frame in the cover area of the protective cover; the machine body, the heating device and the temperature sensor are all electrically connected to a controller arranged on the protective cover.
[0007] Based on the above, a guide sleeve is slidably provided on the guide rod for the steel strands to pass through.
[0008] Based on the above, a handle is provided on the protective cover.
[0009] Based on the above, an observation window is provided on the protective cover, and the material of the observation window is hollow glass.
[0010] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the utility model has the following advantages:
[0011] 1. The slack testing machine with protective function provided by the utility model can shield the experimental table by setting a protective cover to avoid accidental injury to the operator caused by the breaking of the steel strands, thereby ensuring the safety of the experiment.
[0012] 2. In the utility model, a notch for the machine body is provided on the protective cover, and a heating device is also provided on the protective cover. The outlet of the heating device is connected to the air inlet of the exhaust pump. The air outlet of the exhaust pump is connected to the exhaust pipe arranged in the protective cover through an air supply pipe. The exhaust pipe is provided with a strip exhaust port extending along its axis. An exhaust port is provided on the top of the protective cover, and the exhaust port is connected to the inlet of the heating device through a pipe joint. This structural design facilitates the tensile stress test of the steel strands at different temperatures, thereby recording more experimental data and ensuring the practicability of the equipment and the accuracy of the experiment.
[0013] 3. In the utility model, a plurality of reinforcing frames are slidably provided on the guide rod, and the reinforcing frames are fixed to the guide rod by positioning bolts; this structural design can effectively prevent the guide rod from being slightly deformed during the experiment and affecting the accuracy of the experimental data. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0015] Figure 2 yes Figure 1 Schematic diagram of the structure at point A in the middle.
[0016] In the figure: 1. Frame; 2. Protective cover; 2-1. Observation window; 2-2. Notch; 3. Machine body; 4. Fixing frame; 5. Guide rod; 6. Reinforcement frame; 7. Positioning bolt; 8. Guide sleeve; 9. Heating device; 10. Exhaust pump; 11. Air pipe; 12. Exhaust pipe; 13. Exhaust port; 14. Handle; 15. Fixing ear; 16. Fixing bolt; 17. Positioning screw hole; 18. Temperature sensor; 19. Controller; 20. Support frame; 21. Steel strand. DETAILED DESCRIPTION
[0017] The technical solution of the utility model is further described in detail below through specific implementation methods. Example
[0018] like Figure 1-2 As shown, the utility model provides a relaxation testing machine with a protective function, including a frame 1, on which a fixing frame 4 and a body 3 for stress relaxation testing of a steel strand 21 are provided, a plurality of guide rods 5 are arranged in parallel between the fixing frame 4 and the body 3, a plurality of reinforcing frames 6 are slidably arranged on the plurality of guide rods 5, and the reinforcing frames 6 are fixed together with the guide rods 5 by positioning bolts 7; a protective cover 2 is rotatably provided on the frame 1, a notch 2-2 for the body 3 is provided on the protective cover 2, a heating device 9 is also provided on the protective cover 2, the outlet of the heating device 9 is connected to the air inlet of an exhaust pump 10, and the air outlet of the exhaust pump 10 is connected to the air inlet of the exhaust pump 10 by a positioning bolt 7; The air supply pipe 11 is communicated with the exhaust pipe 12 arranged in the protective cover 2, and the exhaust pipe 12 is provided with a strip exhaust port 13 extending along its axis. The top of the protective cover 2 is provided with an exhaust port, and the exhaust port is connected to the inlet of the heating device 9 through a pipe joint; the protective cover 2 is provided with a fixing ear 15, and the fixing ear 15 is threaded with a fixing bolt 16, and the frame 1 is provided with a positioning screw hole 17 corresponding to the fixing bolt 16; the frame 1 is also provided with a temperature sensor 18 in the cover area of the protective cover 2; the body 3, the heating device 9 and the temperature sensor 18 are all electrically connected to the controller 19 arranged on the protective cover 2.
[0019] In order to facilitate the installation of the steel strands 21 , a guide sleeve 8 is slidably provided on the guide rod 5 for the steel strands 21 to pass through.
[0020] In order to facilitate the reversal of the protective cover 2 , a handle 14 is provided on the protective cover 2 .
[0021] During the experiment, in order to facilitate observation inside the protective cover 2, an observation window 2-1 is provided on the protective cover 2, and the material of the observation window 2-1 is hollow glass.
[0022] It should be noted that, when the protective cover 2 is opened, in order to facilitate the limiting support thereof, a support frame 20 for the protective cover is provided on the frame 1 .
[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.
Claims
1. A relaxation testing machine with a protective function, characterized in that: The invention comprises a frame (1), wherein a fixing frame (4) for testing the stress relaxation of a steel strand (21) and a machine body (3) are provided on the frame (1), a plurality of guide rods (5) are provided in parallel between the fixing frame (4) and the machine body (3), a plurality of reinforcing frames (6) are slidably provided on the plurality of guide rods (5), and the reinforcing frames (6) are fixed together with the guide rods (5) by positioning bolts (7); a protective cover (2) is rotatably provided on the frame (1), a notch (2-2) for the machine body (3) is provided on the protective cover (2), a heating device (9) is further provided on the protective cover (2), an outlet of the heating device (9) is connected to an air inlet of an exhaust pump (10), and an air outlet of the exhaust pump (10) is connected to a gas supply pipe (11) and a heating device (9) is provided on the protective cover (2). The protective cover (2) is connected to an exhaust pipe (12), the exhaust pipe (12) is provided with a strip exhaust port (13) extending along its axis, the top of the protective cover (2) is provided with an exhaust port, and the exhaust port is connected to the inlet of the heating device (9) through a pipe joint; the protective cover (2) is provided with a fixing ear (15), and a fixing bolt (16) is screwed through the fixing ear (15), and the frame (1) is provided with a positioning screw hole (17) corresponding to the fixing bolt (16); the frame (1) is also provided with a temperature sensor (18) in the cover area of the protective cover (2); the machine body (3), the heating device (9) and the temperature sensor (18) are all electrically connected to a controller (19) arranged on the protective cover (2).
2. The relaxation testing machine with protective function according to claim 1, characterized in that: The guide rod (5) is also slidably provided with a guide sleeve (8) for the steel strand (21) to pass through.
3. The relaxation testing machine with protective function according to claim 1, characterized in that: The protective cover (2) is provided with a handle (14).
4. The relaxation testing machine with protective function according to claim 1, characterized in that: An observation window (2-1) is provided on the protective cover (2), and the material of the observation window (2-1) is hollow glass.