Wire testing device and method

Abstract

The application discloses a wire test device and a test method, and aims at solving the technical problems that stress corrosion of the wire cannot be simulated and the test device has low test efficiency in the prior art. The wire test device is used for performance test of the wire under stress and corrosion medium, and comprises a frame, the frame having at least one containing space for containing a medium cylinder, the medium cylinder being used for containing at least corrosion medium; and a stretching device, the stretching device being arranged at one end of the frame and being used for stretching the wire along the length direction of the wire. When the wire test device is in a test state, the wire passes through the medium cylinder, one end of the wire is connected with the frame, and the other end of the wire is fixedly connected with the stretching device. The wire test device is used for performance test of the wire under stress and corrosion medium.

Description

Technical Field

[0001] This disclosure relates to the field of testing, and more particularly to a wire testing apparatus and testing method. Background Technology

[0002] Prestressed wire rods are widely used in bridges, tunnels, buildings, water conservancy, energy, and geotechnical engineering. One type of failure and fracture in prestressed wire rods—fracture under the combined action of stress and corrosive media—has not received sufficient attention.

[0003] Especially for metallic materials, stress corrosion cracking (SCC) can occur under stress and corrosive media. Furthermore, because SCC is a rapid and unpredictable fracture process, it poses a safety hazard to certain systems or equipment. Stress corrosion is a brittle fracture without warning; its formation mechanism involves the initial formation of cracks within the metal, followed by stress concentration, which accelerates crack propagation. In engineering projects, the consequences of stress corrosion can be catastrophic.

[0004] Current stress corrosion tests on prestressed wires cannot simulate actual stress corrosion conditions, and the test equipment is cumbersome to operate and has low testing efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a wire testing device and testing method to solve the technical problems of being unable to simulate stress corrosion of wires and low testing efficiency of the testing device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides a wire testing device for testing the performance of wires under stress and corrosive media. The wire testing device includes...

[0008] A frame having at least one receiving space for accommodating a medium cylinder for at least containing the corrosive medium;

[0009] A tensioning device is disposed at one end of the frame and is used to stretch the wire along the length direction of the wire.

[0010] When the wire testing device is in the testing state, the wire passes through the medium cylinder, and one end of the wire is connected to the frame, while the other end of the wire is fixedly connected to the tensioning device.

[0011] According to at least one embodiment of this disclosure, the tensioning device includes a lead screw and a fixing device for fixing the wire to the lead screw.

[0012] The stretching device further includes a drive mechanism that is poweredly connected to the lead screw, the drive mechanism driving the lead screw to stretch the wire along the length direction of the wire.

[0013] According to at least one embodiment of the present disclosure, the medium cylinder includes a cylinder body and sealing devices disposed at both ends of the cylinder body. Each sealing device includes a sealing plug and a knob having a cavity through which the sealing plug passes. The knob is detachably connected to the cylinder body, and the sealing plug has a through hole through which the wire passes.

[0014] According to at least one embodiment of the present disclosure, the medium cylinder further includes a temperature control device disposed on the cylinder body, the temperature control device being used to control the temperature of the corrosive medium inside the cylinder body.

[0015] According to at least one embodiment of the present disclosure, the medium cylinder is provided with a small hole for adding a corrosive medium and / or for setting a temperature sensor to monitor the temperature of the corrosive medium, the temperature sensor communicating with the temperature control device.

[0016] According to at least one embodiment of this disclosure, the cylinder is cylindrical, and the inner diameter of the cylinder is D.

[0017] The inner diameter of the cylinder satisfies Wherein, d is the nominal diameter of the wire, in mm.

[0018] According to at least one embodiment of the present disclosure, the wire testing device further includes a wire-blocking drum disposed on the outside of the frame, the wire-blocking drum being used to prevent the end of the wire from splashing off, the wire-blocking drum being disposed at the fixed connection position between the frame and the wire, and / or, the wire-blocking drum being disposed at the connection position between the frame and the lead screw.

[0019] According to at least one embodiment of the present disclosure, a baffle is provided in each of the accommodating spaces, the baffle being disposed on the frame, and each baffle dividing the corresponding accommodating space into a first accommodating space and a second accommodating space, wherein the first accommodating space is used to accommodate at least a portion of the stretching device, and the second accommodating space is used to accommodate the medium cylinder.

[0020] According to at least one embodiment of the present disclosure, the wire testing apparatus further includes a force sensor, wherein the force sensor is disposed on the wire at a connection position with the frame, and / or, the force sensor is disposed on the lead screw at a connection position with the frame.

[0021] Compared with existing technologies, the wire testing apparatus provided by this invention is used for performance testing of wires under stress and corrosive media. The apparatus includes a frame with at least one receiving space for accommodating a media cylinder, which at least contains the corrosive media. In the testing state, the wire passes through the cylinder, with one end connected to the frame and the other end connected to a tensioning device, immersing the wire in the corrosive media within the cylinder. By connecting one end of the wire to the tensioning device, the device stretches the wire along its length, thereby immersing the wire in the corrosive media within the cylinder for tensile testing. This simulates the tensile stress of prestressed wires in complex real-world environments, enabling performance testing of prestressed wires under various complex working conditions and axial stress states.

[0022] The present invention also provides a test method for a wire testing device, which is used in the above-mentioned wire testing device, including applying sealant to the wire and the corresponding sealing plug and / or the corresponding knob position.

[0023] Compared with existing technologies, the wire testing device and method described in this invention have the following advantages:

[0024] The testing method of the wire testing device described in this invention has the same advantages as the wire testing device described above, and will not be repeated here. Attached Figure Description

[0025] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0026] Figure 1 This is a top view schematic diagram of the wire testing apparatus according to the present disclosure;

[0027] Figure 2 This is a front view schematic diagram of the wire testing apparatus according to an embodiment of the present disclosure;

[0028] Figure 3 This is a side view schematic diagram of the wire testing apparatus according to an embodiment of the present disclosure;

[0029] Figure 4 This is a schematic front view of the dielectric cylinder of the wire testing apparatus according to an embodiment of the present disclosure;

[0030] Figure 5 This is a side view of the dielectric cylinder of the wire testing apparatus according to an embodiment of the present disclosure;

[0031] Figure 6 This is a schematic diagram of the sealing plug of the wire testing apparatus according to an embodiment of the present disclosure, where a is the front view and b is the side view. Detailed Implementation

[0032] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0033] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Stress corrosion cracking (SCR) is a type of delayed fracture that occurs in materials under the combined action of stress and a corrosive medium. SCR is a rapid fracture process, and its unpredictability can lead to catastrophic consequences in engineering projects. Currently, it is difficult to obtain accurate performance parameters for SCR testing.

[0035] To address the aforementioned problems, embodiments of the present invention provide a wire testing device that can simulate actual corrosion under stress conditions, and is easy to operate, providing accurate and reliable test data.

[0036] Please see Figures 1-3 As shown, the wire testing device provided in this embodiment of the invention is used for performance testing of wires under stress and corrosive media. The wire testing device includes a frame 1, which has at least one receiving space for accommodating a medium cylinder 6, the medium cylinder 6 being used to at least contain a corrosive medium; a tensioning device 4, which is disposed at one end of the frame and is used to stretch the wire 8 along its length direction; when the wire testing device is in the testing state, the wire 8 passes through the medium cylinder 6, and one end of the wire 8 is connected to the frame 1, and the other end of the wire 8 is connected to the tensioning device 4.

[0037] One end of the wire 8 is fixedly connected to one end of the frame 1, and the other end of the wire 8 is fixedly connected to the other end of the frame 1 via a tensioning device 4 located on the other end of the frame. The medium cylinder 6 is disposed within the receiving space of the frame 1; therefore, the frame 1 not only serves to fix the wire 8 but also provides some protection, preventing the wire from injuring personnel or equipment if it breaks. The tensioning device 4 can move relative to the frame 1, thereby stretching the wire. By passing a portion of the wire 8 through the medium cylinder 6, the wire 8 is immersed in the corrosive medium, allowing for testing of the mechanical properties of the wire 8 under stress and in the corrosive medium. It is understood that the wire here includes not only monofilament wire but also stranded wire, barn wire, etc. Exemplarily, the wire can be steel wire, steel strand, or wire made of other metallic materials.

[0038] In practical applications, the wire 8 to be tested is passed through one end of the frame 1, the medium cylinder 6 and the tensioning device 4 located at the other end of the frame in sequence, and the two ends of the wire are fixed. Corrosive medium is filled into the medium cylinder 6, the initial tension is applied to the wire, the position of the wire is adjusted, and the drive mechanism is turned on. When the corrosion time reaches the test cycle or the wire breaks, the test ends.

[0039] The wire testing device provided in this invention can test the time or tension of a wire immersed in a corrosive medium until it breaks under a constant or variable load tensile force. It can realistically simulate the tensile condition of real prestressed wire in a corrosive medium. The testing equipment has a simple structure and is not complicated to operate.

[0040] It is worth noting that the corrosive medium provided in the embodiments of the present invention can be adjusted according to the actual situation. For example, the corrosive medium can be selected as a 25% ammonium thiocyanate solution. In some embodiments, the specific corrosive medium is not limited here.

[0041] The tensioning device 4 includes a lead screw and a fixing device for fixing the wire 8 to the lead screw. The tensioning device 4 also includes a drive mechanism poweredly connected to the lead screw, which drives the lead screw to stretch the wire 8 along its length. Exemplarily, the lead screw is a ball screw, and the drive mechanism is fixedly mounted on a frame. It is understood that the drive mechanism can be a motor, an electric cylinder, or a hydraulic cylinder. The lead screw passes through a through hole in the frame. Optionally, a keyway is provided on the lead screw, and it is fixedly connected to the frame by a key to prevent rotation of the lead screw during tensioning. The fixing device for fixing the wire 8 to the lead screw is, exemplarily, a single-hole anchor. The lead screw has a through hole at its center for the wire 8 to pass through, and a single-hole anchor clamp is used to fix the steel strand in the through hole of the lead screw. It is understood that the connection between the wire 8 and the end of the frame can also be achieved by using a single-hole anchor to fix the wire 8 to the frame.

[0042] Please see Figures 4-6 The medium cylinder 6 of this embodiment includes a cylinder body and sealing devices disposed at both ends of the cylinder body. Each sealing device includes a sealing plug 64 and a knob 63 having a cavity through which the sealing plug 64 passes. The knob 63 is detachably connected to the cylinder body, and the sealing plug 64 has a through hole for the wire 8 to pass through. Considering that the cylinder body requires the wire 8 to pass through and that the cylinder body contains a corrosive medium, in order to prevent the corrosive medium from flowing out, a sealing plug 64 and a knob 63 are respectively provided at both ends of the cylinder body. The knob 63 is exemplaryly threaded to the end of the cylinder body, and the knob 63 has a cavity. The sealing plug 64 is disposed in the cavity of the knob 63, and the wire 8 passes through the through hole of the sealing plug 64.

[0043] In practical applications, the knobs 63 at both ends of the cylinder are turned off in advance to loosen the sealing plugs 64, allowing the wire 8 to pass smoothly through both ends of the cylinder. After the wire 8 is installed, the knobs 63 at both ends of the medium cylinder 6 are tightened to ensure that the sealing plugs 64 seal the medium cylinder 6. For example, at the contact point between the sealing plugs 64 and the wire 8, sealant is evenly applied to both the inside and outside of the wire 8 to prevent corrosive media from flowing out of the wire 8.

[0044] In some embodiments, the wire testing apparatus provided in this invention further includes a temperature control device 62 disposed on the cylinder, which controls the temperature of the corrosive medium inside the cylinder. The temperature control device 62 is disposed on the cylinder and connected to an external power source via an electrical wire. It can automatically adjust the temperature of the corrosive medium in the medium cylinder, thereby achieving a constant temperature experimental environment. The temperature control device 62 can heat up and cool down, enabling mechanical property testing of the wire under constant load and corrosive medium conditions at constant temperature, as well as mechanical property testing of the wire under constant load and corrosive medium conditions at varying temperatures. For example, it tests the time taken for a prestressed wire to break when immersed in a given constant temperature corrosive medium under constant tensile force. The wire testing apparatus of this invention can effectively simulate the tensile stress of wire in a complex real-world environment, enabling testing of the fracture time of prestressed wire under various complex working conditions and axial stress states.

[0045] In some embodiments, the medium cylinder provided in this invention is further provided with a small hole 61. The small hole 61 is used to add the corrosive medium into the cylinder, or it is used to house a temperature sensor to monitor the temperature of the corrosive medium. The real-time temperature monitored by the temperature sensor is sent to a temperature control device 62, which then corrects the temperature of the corrosive medium to ensure the accuracy of the test environment. Exemplarily, the small hole 61 is also used to allow the corrosive medium in the medium cylinder 6 to flow out after the test is completed.

[0046] In some embodiments, the cylinder is cylindrical with an inner diameter of D, and the inner diameter of the cylinder satisfies... Where d is the nominal diameter of the wire, in mm. The cylindrical shape of the cylinder and the inner diameter of the cylinder satisfy the above conditions, ensuring that the portion of the wire 8 within the cylinder is completely submerged in the corrosive medium, and that even if the cylinder deflects, the wire 8 will not leak out of the corrosive medium. The length of the medium cylinder 6 should be greater than 300 mm. In some embodiments, the length of the medium cylinder 6 is not specifically limited and is set according to experimental needs. Simultaneously, the material used to make the medium cylinder should have corrosion resistance, effectively resisting the erosion of corrosive media at high or low temperatures. For example, the liquid level of the corrosive medium should be at least 3 / 4 of the inner diameter of the cylinder, ensuring that the corrosive medium completely submerges the wire 8.

[0047] In some optional embodiments, the wire testing apparatus further includes a wire-blocking bucket 2, which is disposed on the outer side of the frame 1. The wire-blocking bucket 2 is used to prevent the ends of the wire 8 from splashing out. When the wire 8 is subjected to a tensile test, if the wire 8 breaks, its two ends located on the outer side of the frame 1 may jump out. The wire-blocking bucket 2 is used to block the jump-out wire 8, providing a certain degree of protection and improving the safety of the test. There can be multiple wire-blocking buckets 2. For example, they can be set at corresponding positions at the end of the frame 1 that is fixedly connected to the wire 8, and the ends of the wire 8 that are fixedly connected to the lead screw are also covered by the wire-blocking bucket 2, so that even if the ends of the wire 8 splash out, they will fall into the wire-blocking bucket 2.

[0048] In some embodiments, the frame 1 provided in this invention has a receiving space in which a baffle is provided in each receiving space. The baffle is disposed on the frame 1, and each baffle divides the corresponding receiving space into a first receiving space and a second receiving space. The first receiving space is used to accommodate at least a portion of the stretching device 4, and the second receiving space is used to accommodate the medium cylinder 6. That is, the baffle separates the medium cylinder 6 and the stretching device 4, forming two independent spaces. For example, placing a baffle at 3 / 4 of the length of the receiving space can effectively prevent leaked corrosive media from eroding the stretching device. Optionally, a hole is also provided at the bottom of the second receiving space for draining waste liquid.

[0049] Understandably, frame 1 can have multiple separate, parallel storage spaces, each capable of independent testing. These multiple independent testing environments can simultaneously conduct tensile stress tests on prestressed wires of different specifications. For example, tensile stress tests on small-diameter and large-diameter prestressed wires can be performed simultaneously. Therefore, testing efficiency can be significantly improved.

[0050] In some embodiments, the wire testing device further includes a force sensor 5, which is disposed on the outside of the frame. Exemplarily, the force sensor 5 is disposed on the wire 8 at its connection point with the frame 1, or on the lead screw at its connection point with the frame 1. Exemplarily, force sensors 5 are disposed at both ends of the wire at the connection points between the frame and the wire, for real-time force value feedback. The wire testing device of this embodiment can accurately determine the tensile properties of wire media, improving the success rate and accuracy of tensile property tests on prestressed wire media.

[0051] This invention also provides a test method for a wire testing device, which includes applying sealant to the wire and the corresponding sealing plug and / or corresponding knob position.

[0052] The testing method of the wire testing device described in this invention has the same advantages as the wire testing device described above, and will not be repeated here.

[0053] Specifically, the wire testing device and testing method provided in this embodiment of the invention include:

[0054] Step S1: Select a suitable single-hole anchor, test environment, sealing plug 64 and medium cylinder 6 according to the specifications of the prestressed wire 8.

[0055] Step S2: Determine the length of the prestressed wire 8 based on the length of the prestressed wire testing device and the length of the clamping device, and determine the position for applying sealant to the prestressed wire 8 based on the location of the medium cylinder 6 and the length of the medium cylinder 6.

[0056] Step S3: Disassemble the prestressed wire 8, apply sealant evenly to the inner and outer sides of the corresponding position of the prestressed wire, and then twist the wire 8 together again.

[0057] Step S4: Pass the prestressed wire 8 sequentially through one end of the frame 1, the medium cylinder 6, and the other end of the frame 1. Before inserting the prestressed wire 8 into the medium cylinder 6, loosen the knobs 63 at both ends of the medium cylinder 6 and loosen the sealing plugs 64 to ensure that the prestressed wire 8 passes smoothly through the medium cylinder 6. After the prestressed wire 8 is installed, tighten the knobs 63 at both ends of the medium cylinder 6, and install single-hole anchors at both ends of the wire 8. Adjust the clamps to make them basically flush.

[0058] Step S5: Start the equipment and software, apply preload (approximately 2kN), and adjust the single-hole anchors at both ends to align the prestressed wire 8. Apply sealant to the wire at knob 63 on the medium cylinder 6 and let it stand for a period of time.

[0059] Step S6: Inject the corrosive medium into the medium cylinder 6. Stop injecting when the height of the corrosive medium reaches 3 / 4 of the height of the medium cylinder 6. At this time, the corrosive medium completely submerges the prestressed wire.

[0060] Step S7: Set the relevant parameters for prestressed wire medium tensile testing and activate the temperature sensor. The prestressed wire medium tensile device 4 automatically loads, heats, or cools the wire. When the force and temperature reach the test start conditions, the prestressed wire medium tensile performance test automatically begins. The test data and results are observed and recorded.

[0061] The following describes the dielectric tensile properties of wires tested using the wire testing device, based on several specific embodiments.

[0062] Example 1

[0063] (1) Select a standard prestressed steel strand sample made of seven steel wires with a nominal diameter of 15.2 mm and a tensile strength of 1860 MPa. Select a suitable single-hole anchor, test environment, sealing plug and medium cylinder according to the specifications of the prestressed steel strand.

[0064] (2) The length of the prestressed steel strand is determined to be 1700mm based on the length of the prestressed wire medium tensioning device and the length of the clamping device. The position of the prestressed steel strand to apply sealant is determined to be 500mm and 900mm away from one end of the steel strand based on the location of the medium cylinder and the length of the medium cylinder.

[0065] (3) Disassemble the prestressed steel strands, apply sealant evenly to the inner and outer sides at 500mm and 900mm from one end of the steel strands, and then twist the steel strands together again.

[0066] (4) Pass the prestressed steel strands sequentially through one end of the main unit's frame, the medium cylinder, and the other end of the main unit's frame. Before inserting the prestressed steel strands into the medium cylinder, loosen the knobs at both ends of the medium cylinder and loosen the sealing plugs to ensure that the prestressed steel strands pass smoothly through the medium cylinder. After the prestressed steel strands are installed, tighten the knobs at both ends of the medium cylinder, install single-hole anchors at both ends of the steel strands, and adjust the clamps to make the clamps basically flush.

[0067] (5) Start the equipment and software, apply pre-tightening force, and adjust the single-hole anchors at both ends to center the prestressed steel strands. Apply sealant to the steel strands at the knob of the medium cylinder and let it stand for a period of time.

[0068] (6) Select a 25% ammonium thiocyanate solution as the medium solution. Inject the ammonium thiocyanate solution into the medium cylinder. Stop injecting when the ammonium thiocyanate solution reaches 3 / 4 of the height of the medium cylinder. At this time, the solution completely submerges the prestressed steel strand.

[0069] (7) Set the relevant parameters for the tensile testing of the prestressed steel strand medium—the experimental force value is 80%. ( The average of the nominal maximum force of the two specimens was used. The experimental temperature was 50℃, and the test length L0 was 400mm (the portion immersed in the solution). The temperature sensor was activated, and the prestressed wire medium tensile test was automatically loaded and heated through the automatic control software of the prestressed wire medium tensile test device. When the force and temperature reached the test start conditions, the prestressed wire medium tensile test was automatically started. The test data and results were observed and recorded. The test results showed that the specimen fractured after 18.5 hours of testing, and the fracture occurred within the test length L0.

[0070] Example 2

[0071] The difference between this embodiment and Embodiment 1 is that the experimental temperature is 4℃, and the test results show that the sample fractured after 12.4 hours of testing, and the fracture occurred within the test length L0.

[0072] Example 3

[0073] The difference between this embodiment and Embodiment 1 is that the specimen is a low-relaxation spiral ribbed steel wire with a nominal diameter of 10 mm and a tensile strength of 1570 MPa. Test results show that the specimen fractured after 12.2 hours of testing, and the fracture occurred within the test length L0.

[0074] Example 4

[0075] The difference between this embodiment and Embodiment 1 is that the nominal diameter of the sample is 10 mm, and the tensile strength is 1570 MPa. The sample is a low-relaxation spiral ribbed steel wire. The experimental temperature is 4℃. The test results show that the sample broke after 13.7 h of the experiment. The breakage occurred within the test length L0.

[0076] As can be seen from the above embodiments, the wire testing device of the present invention can realistically simulate the tensile stress of prestressed wires in complex environments, and realize the testing of the fracture time of prestressed wires under various complex working conditions and axial stress states. Furthermore, the device is controlled by an automated operating system, making it simple to operate, highly responsive, and reliable.

[0077] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A wire testing device, characterized in that, The wire testing apparatus is used for performance testing of the wire under stress and corrosive media, and includes: A frame having at least one receiving space for accommodating a medium cylinder for at least containing the corrosive medium; A tensioning device is disposed at one end of the frame and is used to stretch the wire along the length direction of the wire. When the wire testing device is in the testing state, the wire passes through the medium cylinder, the wire is immersed in the corrosive medium, one end of the wire is connected to the frame, and the other end of the wire is fixedly connected to the tensile device. The tensioning device includes a lead screw and a fixing device for fixing the wire to the lead screw, wherein the fixing device is a single-hole anchor. The stretching device further includes a drive mechanism that is poweredly connected to the lead screw, the drive mechanism driving the lead screw to stretch the wire along the length direction of the wire; The medium cylinder is a cylindrical body with an inner diameter of D, and the inner diameter of the cylinder satisfies the following conditions: Wherein, d is the nominal diameter of the wire, in mm; The medium cylinder is provided with a small hole, which is used for adding corrosive medium and / or for setting a temperature sensor to monitor the temperature of the corrosive medium; The wire testing device also includes a wire-blocking drum disposed outside the frame, which is used to prevent the end of the wire from splashing off.

2. The wire testing device according to claim 1, characterized in that, The medium cylinder includes a cylinder body and sealing devices disposed at both ends of the cylinder body. Each sealing device includes a sealing plug and a knob having a cavity through which the sealing plug passes. The knob is detachably connected to the cylinder body. The sealing plug has a through hole through which the wire passes.

3. The wire testing device according to claim 2, characterized in that, The medium cylinder also includes a temperature control device disposed in the cylinder body, the temperature control device being used to control the temperature of the corrosive medium inside the cylinder body.

4. The wire testing device according to claim 3, characterized in that, The temperature sensor communicates with the temperature control device.

5. The wire testing device according to claim 1, characterized in that, The wire-blocking drum is installed at the connection point between the frame and the wire.

6. The wire testing apparatus according to claim 1, characterized in that, The lead screw is provided at the connection point between the frame and the lead screw.

7. The wire testing apparatus according to claim 1, characterized in that, Each of the accommodating spaces is provided with a baffle on the frame, and each baffle divides the corresponding accommodating space into a first accommodating space and a second accommodating space, wherein the first accommodating space is used to accommodate at least a portion of the stretching device, and the second accommodating space is used to accommodate the medium cylinder.

8. The wire testing apparatus according to claim 1, characterized in that, The wire testing device further includes a force sensor, which is installed on the wire at the connection position with the frame, and / or, on the lead screw at the connection position with the frame.

9. A testing method for a wire testing device, characterized in that, The wire testing apparatus according to any one of claims 1-8 includes applying sealant to the wire and the corresponding sealing plug and / or the corresponding knob position.

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