A creep rupture test system capable of power-off protection and reconnection and a working method thereof

Abstract

The application discloses a creep endurance test system capable of power-off protection and reconnection and a working method thereof, and belongs to the technical field of test equipment. The system comprises a first lifting boom, a second lifting boom, a lever force adding mechanism and an electromagnetic unhooking device. The upper end of the first lifting boom is connected with the lever force adding mechanism, the electromagnetic unhooking device is respectively connected with the lower end of the first lifting boom and the upper end of the second lifting boom, and the lower end of the second lifting boom is connected with a weight. A weight tray is arranged below the weight and is connected with a lifting device. A force value sensing device is arranged on the lever force adding mechanism and is electrically connected with the lifting device. The electromagnetic unhooking device is respectively connected with a commercial power supply device and an uninterruptible power supply. The application can avoid the problem of abnormal fracture of a sample caused by excessive cooling shrinkage stress when a mechanical creep endurance test machine is powered off, and can reconnect and continue the test after power recovery, and has high automation degree.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of test equipment, and particularly relates to a creep rupture test system capable of power-off protection and reconnection and a working method thereof. BACKGROUND

[0002] In order to master the relevant mechanical properties of materials, people have designed various test machines for testing the mechanical properties of materials. At present, the test machines for measuring the mechanical properties of metal materials in creep rupture on the market mainly adopt a lever loading structure to provide tension to the sample, a heating furnace capable of setting temperature is additionally arranged outside the sample to heat the sample, after stretching for a certain time, the sample creeps until it breaks, and the relevant parameters of the material can be measured by the instrument. The basic structure of such a test machine is that the lever force loading mechanism is arranged at the top of the rack, the load is hung on the hanger at one end of the power arm of the lever, the sample is hung and clamped at one end of the resistance arm of the lever, a measuring instrument is connected to the sample, and a heating furnace capable of setting temperature is additionally arranged outside the sample. That is, the upper end of the sample is clamped and fixed (hung) at one end of the resistance arm of the lever, the lower end of the sample is clamped and connected to the transmission device, when the sample creeps and extends upward (the lower end of the sample is fixed by the transmission device and cannot displace), the lever tilts upward, and the load is hung at one end of the power arm of the lever.

[0003] The creep rupture test cycle is long, which is several tens of hours at the shortest and tens of thousands of hours at the longest. In order to ensure that the test machine is stable and continuous during the test process, a continuous power supply mode is generally provided in the creep rupture test room to ensure uninterrupted power supply of the equipment. However, in special cases, the uninterrupted power supply cannot meet the power-off needs, resulting in power-off of the test machine. After power-off, the sample may be abnormally broken due to excessive cooling shrinkage stress. Due to the time factor of the creep rupture test, the abnormal breakage of the sample with a test time of thousands or tens of thousands of hours will cause irreparable loss. In addition, the existing test system can protect the sample after power-off (CN113049380A-A method for protecting the sample from overload breakage during power-off of a creep rupture test machine), but manual recovery is still needed after the power recovery, which is low in efficiency and delays the test process. SUMMARY

[0004] In order to solve the above-mentioned existing problems, the purpose of the present application is to provide a creep rupture test system capable of power-off protection and reconnection and a working method thereof, which can avoid the problem of abnormal breakage of the sample due to excessive cooling shrinkage stress during power-off of the mechanical creep rupture test machine, and can reconnect and continue the test after power recovery, with high automation.

[0005] The present application is realized by the following technical solutions:

[0006] The application discloses a creep endurance test system capable of power-off protection and reconnection, which comprises a first lifting rod, a second lifting rod, a lever force adding mechanism, an electromagnetic unhooking device, a weight, a weight tray, a force value sensing device and a lifting device.

[0007] The upper end of the first lifting rod is connected with the lever force adding mechanism, the electromagnetic unhooking device is connected with the lower end of the first lifting rod and the upper end of the second lifting rod respectively, and the lower end of the second lifting rod is connected with the weight. The weight tray is arranged below the weight and is connected with the lifting device. The force value sensing device is arranged on the lever force adding mechanism and is electrically connected with the lifting device. The electromagnetic unhooking device is connected with a commercial power supply device and an uninterrupted power supply respectively.

[0008] Preferably, the force value sensing device is a patch type stress sensor.

[0009] Preferably, the upper end of the first lifting rod is fixedly connected with the lever force adding mechanism, and the lower end of the second lifting rod is fixedly connected with the weight.

[0010] Preferably, the horizontal width of the weight tray is greater than that of the weight.

[0011] Preferably, the weight tray is provided with an anti-skid device.

[0012] Preferably, a damping buffer device is arranged between the weight tray and the lifting device.

[0013] Preferably, the lifting device is a hydraulic lifting device.

[0014] Preferably, the force value sensing device is connected with the lifting device through wireless communication.

[0015] The application further discloses a working method of the creep endurance test system capable of power-off protection and reconnection.

[0016] When the commercial power supply is interrupted, the electromagnetic unhooking device is powered by the uninterrupted power supply to normally maintain the preset loading force. When the commercial power supply is restored during the power supply period of the uninterrupted power supply, the test is normally conducted. When the commercial power supply is not restored and the uninterrupted power supply is powered off due to power consumption, the electromagnetic unhooking device is automatically unhooked, the lever force adding mechanism is kept in a free state, and the sample is not subjected to the load. When the commercial power supply is restored, the lifting device drives the weight tray to lift the weight upwards, the electromagnetic unhooking device is automatically attracted, the force value sensing device receives the force value signal and feeds back to the lifting device, the lifting device stops upward movement, and the weight tray is restored to the initial position, so that the sample is subjected to the load from the weight.

[0017] Preferably, the system records the time when the electromagnetic unhooking device is automatically unhooked and the time when the electromagnetic unhooking device is automatically attracted.

[0018] Compared with the prior art, the application has the following beneficial technical effects:

[0019] The application discloses a creep rupture test system capable of power-off protection and reconnection, an electromagnetic unhooking device is arranged between a first lifting rod and a second lifting rod, and the first lifting rod is connected with a lever force adding mechanism through the electromagnetic unhooking device; under the power-on state, the electromagnetic unhooking device can ensure that the lifting rod transmits the load to the lever force adding mechanism; when the uninterrupted power supply is powered off due to power consumption, the electromagnetic unhooking device is automatically unhooked, the lever force adding mechanism remains in a free state, and the sample is not subjected to the load; after the commercial power is restored, the weight tray automatically lifts the weight upwards, the electromagnetic unhooking device is automatically attracted, and after the force value sensing device at the top of the equipment receives the force value signal, the lifting device is fed back to stop upward movement and restore the weight tray to the initial position.

[0020] Further, the force value sensing device adopts a patch type stress sensor, and has high sensitivity and high precision.

[0021] Further, the upper end of the first lifting rod is fixedly connected with the lever force adding mechanism, and the lower end of the second lifting rod is fixedly connected with the weight, so that the system has sufficient rigidity to transmit the force and can be reset, and the pendulum movement is avoided to offset the weight.

[0022] Further, the horizontal width of the weight tray is greater than that of the weight, so that the weight tray can stably support the weight.

[0023] Further, the weight tray is provided with an anti-skid device to avoid the weight from sliding and falling.

[0024] Further, a damping buffer device is arranged between the weight tray and the lifting device to avoid the weight from impacting the lifting device and improve the service life.

[0025] Further, the lifting device adopts a hydraulic lifting device, and has stable structure and fast response speed.

[0026] Further, the force value sensing device is connected with the lifting device through wireless communication, and has fast response speed and avoids complicated wiring.

[0027] The working method of the creep rupture test system capable of power-off protection and reconnection can avoid the abnormal fracture problem of the sample caused by excessive cooling shrinkage stress of the sample when the mechanical creep rupture testing machine is powered off, can reconnect and continue the test after the power is restored, and has high automation degree.

[0028] Further, the system records the time when the electromagnetic unhooking device is automatically unhooked and the time when the electromagnetic unhooking device is automatically attracted, can count the total time of the creep rupture test, and guarantees the test precision. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the connection status of the creep endurance test system of the present invention, which is capable of power failure protection and reconnection, when the power supply is normal.

[0030] Figure 2 This is a schematic diagram of the connection status of the creep endurance test system of the present invention after a power outage, which is capable of power failure protection and reconnection.

[0031] In the diagram: 1-1 is the first lifting rod, 1-2 is the second lifting rod, 2 is the lever force-applying mechanism, 3 is the electromagnetic unhooking device, 4 is the weight, 5 is the weight tray, 6 is the force sensing device, and 7 is the lifting device. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. This description is intended to explain the invention and not to limit it.

[0033] The present invention provides a creep endurance test system capable of power failure protection and reconnection, comprising a first lifting rod 1-1, a second lifting rod 1-2, a lever force application mechanism 2, an electromagnetic unhooking device 3, a weight 4, a weight tray 5, a force sensing device 6, and a lifting device 7.

[0034] The upper end of the first lifting rod 1-1 is connected to the lever force-applying mechanism 2. The electromagnetic unhooking device 3 is connected to the lower end of the first lifting rod 1-1 and the upper end of the second lifting rod 1-2. The lower end of the second lifting rod 1-2 is connected to the weight 4. The weight tray 5 is placed below the weight 4 and connected to the lifting device 7. The force sensing device 6 is located on the lever force-applying mechanism 2 and is electrically connected to the lifting device 7. The electromagnetic unhooking device 3 is connected to the mains power supply and the uninterruptible power supply.

[0035] The electromagnetic unhooking device 3 includes two electromagnets. The first lifting rod 1-1 and the second lifting rod 1-2 are respectively connected to one electromagnet. When the two electromagnets are energized, they generate magnetic attraction force to tightly connect the first lifting rod 1-1 and the second lifting rod 1-2. When the power is off, the magnetic attraction force disappears and the first lifting rod 1-1 and the second lifting rod 1-2 separate.

[0036] In a preferred embodiment of the present invention, the force sensing device 6 is a patch-type stress sensor.

[0037] In a preferred embodiment of the present invention, the upper end of the first lifting rod 1-1 is fixedly connected to the lever force-applying mechanism 2, and the lower end of the second lifting rod 1-2 is fixedly connected to the weight 4.

[0038] In a preferred embodiment of the present invention, the horizontal width of the weight tray 5 is greater than that of the weight 4.

[0039] In a preferred embodiment of the present application, the weight tray 5 is provided with anti-skid devices such as rubber pads, nylon pads and the like.

[0040] In a preferred embodiment of the present application, a damping buffer device is provided between the weight tray 5 and the lifting device 7.

[0041] In a preferred embodiment of the present application, the lifting device 7 is a hydraulic lifting device.

[0042] In a preferred embodiment of the present application, the force value sensing device 6 is connected with the lifting device 7 through wireless communication.

[0043] The working method of the creep rupture test system capable of power-off protection and reconnection comprises:

[0044] When the commercial power is off, the electromagnetic unhooking device 3 is powered by the uninterruptible power supply to normally maintain the preset loading force; during the power supply of the uninterruptible power supply, when the commercial power supply is restored, the test is normally carried out; when the commercial power supply is not restored and the power of the uninterruptible power supply is exhausted, the electromagnetic unhooking device 3 is automatically unhooked, the lever force adding mechanism 2 is kept in a free state, and the test sample is not subjected to the load; after the commercial power supply is restored, the lifting device 7 drives the weight tray 5 to upwardly lift the weight 4, the electromagnetic unhooking device 3 is automatically attracted, the force value sensing device 6 receives the force value signal and feeds back to the lifting device 7, the lifting device 7 stops upward movement, and the weight tray 5 is restored to the initial position, so that the test sample is subjected to the load from the weight 4.

[0045] In a preferred embodiment of the present application, the system records the time of automatic unhooking of the electromagnetic unhooking device 3 and the time of automatic attraction of the electromagnetic unhooking device 3, which is counted into the overall test time.

[0046] The present application will be further explained and described below in combination with a specific embodiment:

[0047] The boom in the conventional mechanical creep rupture test machine is replaced by the first boom 1-1 and the second boom 1-2, and the electromagnetic unhooking device 3 is installed between the two booms, and the power supply interface of the electromagnetic unhooking device 3 is connected with the output end of the uninterruptible power supply and the commercial power supply, wherein, in the power-on state, the electromagnetic unhooking device 3 can ensure that the first boom 1-1 and the second boom 1-2 transmit the load to the lever force adding mechanism 2, for reference Figure 1 .

[0048] When the commercial power is off, the electromagnetic unhooking device 3 is powered by the uninterruptible power supply to normally maintain the preset loading force. During the power supply of the uninterruptible power supply, when the commercial power supply is restored, the test is normally carried out; when the commercial power supply is not restored and the power of the uninterruptible power supply is exhausted, the electromagnetic unhooking device 3 is automatically unhooked, the lever force adding mechanism 2 is kept in a free state, and the test sample is not subjected to the load, for reference Figure 2 .

[0049] When the electromagnetic unhooking device 3 is unhooked by itself due to power failure, the lever force adding mechanism 2 remains in a free state, and the sample is not subjected to load, thereby avoiding overload fracture of the sample caused by cooling contraction of the sample due to temperature drop of the heating furnace. When the power is restored, the lifting device 7 automatically lifts the weight 4 upward with the weight tray 5, the electromagnetic unhooking device 3 is automatically attracted, and the force value sensing device 6 at the top of the equipment receives the force value signal, which is fed back to the lifting device 7 to stop upward movement and restore the weight tray 5 to the initial position.

[0050] The electromagnetic unhooking device 3 is normally connected when the power is normally supplied, so that the test machine can ensure that the load is transmitted to the lever force adding mechanism 2 through the first hoist 1-1 and the second hoist 1-2. When power failure occurs, the electromagnetic unhooking device 3 is automatically unhooked, so that the lever force adding mechanism 2 is in a free state and is not subjected to force. When the power is restored, the lifting device 7 automatically lifts the weight 4 upward with the weight tray 5, the electromagnetic unhooking device 3 is automatically attracted, and the force value sensing device 6 at the top of the equipment receives the force value signal, which is fed back to the lifting device 7 to stop upward movement and restore the weight tray 5 to the initial position.

[0051] When the power is restored, the mechanical creep and durability test machine can automatically restore the temperature and load the test force without any manual processing. When the first hoist 1-1 and the second hoist 1-2 are unhooked by themselves due to power failure, the lever force adding mechanism 2 remains in a free state, thereby avoiding overload fracture of the sample caused by cooling contraction of the sample due to temperature drop of the heating furnace.

[0052] The above only describes the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical range disclosed by the present application, or equivalent structures or equivalent process conversions, or direct or indirect application in other related technical fields, should be covered in the protection scope of the present application.

Claims

1. A working method of a creep endurance test system capable of power failure protection and reconnection, comprising a first lifting rod (1-1), a second lifting rod (1-2), a lever force application mechanism (2), an electromagnetic unhooking device (3), a weight (4), a weight tray (5), a force sensing device (6), and a lifting device (7). The upper end of the first lifting rod (1-1) is connected to the lever force-applying mechanism (2), the electromagnetic unhooking device (3) is connected to the lower end of the first lifting rod (1-1) and the upper end of the second lifting rod (1-2) respectively, and the lower end of the second lifting rod (1-2) is connected to the weight (4); the weight tray (5) is set below the weight (4) and connected to the lifting device (7); the force value sensing device (6) is set on the lever force-applying mechanism (2) and electrically connected to the lifting device (7); the electromagnetic unhooking device (3) is connected to the mains power supply device and the uninterruptible power supply respectively; the force value sensing device (6) is a patch stress sensor; the upper end of the first lifting rod (1-1) is fixedly connected to the lever force-applying mechanism (2), and the lower end of the second lifting rod (1-2) is fixedly connected to the weight (4); A method for operating a creep endurance testing system capable of power failure protection and reconnection includes: When the mains power fails, the electromagnetic unhooking device (3) is powered by an uninterruptible power supply to maintain the preset loading force. During the power supply period, when the mains power supply is restored, the test proceeds normally; when the mains power is not restored and the power supply is depleted, the electromagnetic unhooking device (3) automatically unhooks, the lever force mechanism (2) remains in a free state, and the sample is not subjected to load; when the mains power supply is restored, the lifting device (7) drives the weight tray (5) to lift the weight (4) upward, the electromagnetic unhooking device (3) automatically engages, the force value sensing device (6) receives the force value signal and feeds it back to the lifting device (7), the lifting device (7) stops moving upward and restores the weight tray (5) to the initial position, so that the sample is subjected to the load from the weight (4).

2. The working method of the creep endurance test system capable of power failure protection and reconnection according to claim 1, characterized in that, The horizontal width of the weight tray (5) is greater than that of the weight (4).

3. The working method of the creep endurance test system capable of power failure protection and reconnection according to claim 1, characterized in that, The surface of the weight tray (5) is equipped with an anti-slip device.

4. The working method of the creep endurance test system capable of power failure protection and reconnection according to claim 1, characterized in that, A damping buffer device is provided between the weight tray (5) and the lifting device (7).

5. The working method of the creep endurance test system capable of power failure protection and reconnection according to claim 1, characterized in that, The lifting device (7) is a hydraulic lifting device.

6. The working method of the creep endurance test system capable of power failure protection and reconnection according to claim 1, characterized in that, The force sensing device (6) is connected to the lifting device (7) via wireless communication.

7. The operating method of the creep endurance test system capable of power failure protection and reconnection according to claim 1, characterized in that, The system records the time when the electromagnetic unhooking device (3) automatically unhooks and the time when the electromagnetic unhooking device (3) automatically engages.

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