A high pressure mica tape heat elongation testing device

Abstract

The utility model relates to tensile testing device technical field, concretely is a kind of high pressure mica tape's heated elongation testing device, comprising: longitudinal frame, vertically set up liftable mounting plate on longitudinal frame, and setting up clamping assembly on mounting plate;Clamping assembly includes rotating cylinder that rotates and is installed on mounting plate, rotating cylinder is equidistantly provided with two sets of clamping pieces along its circumferential direction, two sets of clamping pieces are connected with the movement structure that is set on mounting plate, and movement structure can drive two sets of clamping pieces mutually close;Mounting plate is also provided with winding structure, and winding structure is connected with movement structure by driving element, and driving element can drive movement structure and winding structure to act successively, and when winding structure acts, two sets of clamping pieces can rotate along with rotating cylinder;Under the cooperation of movement structure and winding structure, the connection firmness between high pressure mica tape and mounting plate can be improved, and the possibility that high pressure mica tape and clamping roll appear to slip in testing process is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of tensile testing devices, specifically a device for testing the thermal elongation of high-pressure mica tape. Background Technology

[0002] High-voltage mica tape uses mica paper as its base material, reinforced with alkali-free glass cloth, polyester film, or other materials on both sides or one side, and bonded with epoxy resin or polyester resin. It features high-temperature resistance and excellent electrical properties, and is primarily used as a fire-resistant insulation material for the main insulation of high-voltage motor coils. High-voltage motors typically withstand high temperatures and pressures. Therefore, when using high-voltage mica tape as the fire-resistant material for the main insulation of high-voltage motor coils, a thermal tensile strength test is necessary.

[0003] Currently, the thermal elongation test of high-pressure mica tape can be performed using an electronic tensile testing machine with high-temperature testing capabilities. After the high-pressure mica tape to be tested is connected to the fixture on the tensile testing machine, the tensile testing machine is started to perform the thermal elongation test on the high-pressure mica tape.

[0004] Existing tensile testing machines typically use wedge clamps or double-sided tightening clamps to hold mica tape. When wedge clamps are in operation, they achieve clamping through the wedge effect, and the clamping force depends on the friction between the wedge structures. For mica tape with a smooth surface, slippage is prone to occur during clamping and stretching. Although some clamps are now equipped with clamping teeth, when clamping and stretching mica tape, the sharp tips of the clamping teeth generate concentrated stress perpendicular to the layers when pressure is applied, which can lead to interlaminar peeling or shear displacement. In this case, the test data will be invalid. Utility Model Content

[0005] The purpose of this invention is to provide a device for testing the thermal elongation of high-pressure mica tape, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A device for testing the thermal elongation of high-pressure mica tape includes: a longitudinal frame, on which a liftable mounting plate is provided, and on which a clamping assembly is provided;

[0008] The clamping assembly includes a rotating cylinder rotatably mounted on the mounting plate. Two sets of clamping members are equidistantly arranged along the circumference of the rotating cylinder. The two sets of clamping members are connected to a movable structure disposed on the mounting plate. The movable structure can drive the two sets of clamping members to move closer to each other.

[0009] The mounting plate is also provided with a winding structure, which is connected to the moving structure through a driving member. The driving member can drive the moving structure and the winding structure to move sequentially. When the winding structure moves, the two sets of clamping members can rotate with the rotating cylinder.

[0010] The high-pressure mica tape heat elongation testing device as described above: the clamping member includes an I-shaped member slidably disposed on the rotating cylinder, and the I-shaped member is provided with clamping rollers.

[0011] The heat-induced elongation testing device for high-pressure mica tape as described above: the moving structure includes a drive rod rotatably mounted on the mounting plate, a threaded rod coaxially disposed on the drive rod, a threaded sleeve threadedly connected to the threaded rod, a sleeve ring rotatably mounted on the threaded sleeve, and the sleeve ring being hinged to the I-shaped part through a hinge rod.

[0012] The high-pressure mica tape heat elongation testing device as described above: the winding structure includes a rotating rod rotatably mounted on the mounting plate, a gear coaxially arranged on the rotating rod, and the gear meshing with toothed structures equidistantly arranged along the circumferential direction of the rotating cylinder.

[0013] The high-pressure mica tape thermal elongation testing device as described above: the driving component includes a second sleeve sleeved on the rotating rod and a first sleeve sleeved on the driving rod, the first sleeve and the second sleeve are fixedly connected, and a first protrusion and a second protrusion are respectively formed on the inner walls of the first sleeve and the second sleeve.

[0014] The high-pressure mica tape thermal elongation testing device described above: the first protrusion is slidably disposed in a composite groove opened on the outer wall of the drive rod, the composite groove including a first vertical groove and a threaded groove.

[0015] The high-pressure mica tape thermal elongation testing device described above: the second protrusion is slidably disposed in the fitting groove opened on the outer wall of the rotating rod, the fitting groove including a rotating groove and a second vertical groove.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] By setting up a driving component, the moving structure and the winding structure are driven to move sequentially. This allows the two sets of clamping rollers to first approach each other to clamp and fix the high-pressure mica tape. Then, the winding structure drives the rotating cylinder and the clamping rollers to rotate, winding the high-pressure mica tape onto the clamping rollers. With the dual fixation of clamping and winding, the stability and firmness of the connection between the high-pressure mica tape and the mounting plate can be improved, the connection strength between the high-pressure mica tape and the mounting plate can be enhanced, and the possibility of slippage or detachment between the high-pressure mica tape and the mounting plate during subsequent testing can be reduced, thereby improving the accuracy of the final test data. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a device for testing the thermal elongation of high-pressure mica tape.

[0019] Figure 2 This is a schematic diagram of the structure on the upper plate in the high-pressure mica tape thermal elongation testing device.

[0020] Figure 3 This is a schematic diagram of the structure on the mounting plate in the high-pressure mica tape thermal elongation testing device.

[0021] Figure 4 This is a schematic diagram of the clamping component in the high-pressure mica tape thermal elongation testing device.

[0022] Figure 5 This is a schematic diagram of the internal structure of the rotating cylinder in the high-pressure mica tape thermal elongation testing device.

[0023] Figure 6 This is a schematic diagram of the clamping component and the moving structure in the device for testing the thermal elongation of high-pressure mica tape.

[0024] Figure 7 This is a schematic diagram of the structure of the moving structure, winding structure, and driving component in the device for testing the thermal elongation of high-pressure mica tape.

[0025] Figure 8 This is a schematic diagram of the composite groove and interlocking groove in the high-pressure mica strip thermal elongation testing device.

[0026] Figure 9 This is a schematic diagram of the drive component in a high-pressure mica tape thermal elongation testing device.

[0027] In the diagram: 1. Longitudinal frame; 101. Upper moving plate; 2. Mounting plate; 201. Lifting plate; 3. Clamping roller; 4. Rotating cylinder; 401. Toothed structure; 402. Slide groove; 5. Threaded rod; 6. I-shaped part; 7. Electric telescopic rod; 8. Hinge rod; 9. Sleeve ring; 10. Drive rod; 1001. First vertical groove; 1002. Threaded groove; 11. Rotating rod; 1101. Rotating groove; 1102. Second vertical groove; 12. Gear; 13. Threaded sleeve; 14. Guide rod; 15. First sleeve; 1501. First protrusion; 16. Second sleeve; 1601. Second protrusion. Detailed Implementation

[0028] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0030] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented even without certain specific details. In some instances, methods, means, and elements well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0031] Please see Figures 1-9 In this embodiment of the invention, a device for testing the thermal elongation of high-pressure mica tape includes:

[0032] A longitudinal frame 1 is provided with a liftable mounting plate 2, and a clamping assembly is provided on the mounting plate 2;

[0033] Specifically, the aforementioned longitudinal frame 1 is mounted on the machine base, and the mounting plate 2 is fixedly connected to the upper moving plate 101 that is slidably mounted on the longitudinal frame 1. The upper moving plate 101 is controlled by the control system on the machine base (not shown in the figure) and can drive the mounting plate 2 to slide along the longitudinal direction of the longitudinal frame 1. In particular, the outer sides of the two sets of longitudinal frames 1 are covered with machine covers (not shown in the figure).

[0034] In use, first use two sets of clamping components to clamp both ends of the high-pressure mica belt, then close the machine cover to put the high-pressure mica belt in a sealed environment. Then, adjust the temperature inside the machine cover to the test temperature through the control system, and then drive the upper moving plate 101 to move through the control system to perform the heat elongation test on the high-pressure mica belt.

[0035] Specifically, please refer to Figures 1-9 The clamping assembly includes a rotating cylinder 4 rotatably mounted on the mounting plate 2. The rotating cylinder 4 has two sets of clamping members equidistantly arranged along its circumference. The two sets of clamping members are connected to a movable structure arranged on the mounting plate 2. The movable structure can drive the two sets of clamping members to move closer to each other.

[0036] The clamping member includes an I-shaped member 6 slidably disposed on the rotating cylinder 4, and a clamping roller 3 is disposed on the I-shaped member 6;

[0037] For details, please refer to Figure 3 , Figure 4 , Figure 5 The two sets of I-shaped parts 6 are slidably disposed in the two sets of sliding grooves 402 opened on the rotating cylinder 4. With the cooperation of the sliding grooves 402 and the I-shaped parts 6, the I-shaped parts 6 can only slide in the radial direction of the rotating cylinder 4.

[0038] Specifically, a rubber structure is provided on the outer wall of the clamping roller 3. The rubber structure can increase the friction between the subsequent clamping roller 3 and the high-pressure mica belt, so that the two sets of clamping rollers 3 can stably clamp the high-pressure mica belt and prevent the high-pressure mica belt from separating from the clamping roller 3 during the subsequent tensile test.

[0039] Further, please refer to Figure 3 , Figure 5 , Figure 6 The movable structure includes a drive rod 10 rotatably mounted on the mounting plate 2, a threaded rod 5 coaxially mounted on the drive rod 10, a threaded sleeve 13 threadedly connected to the threaded rod 5, a sleeve ring 9 rotatably mounted on the threaded sleeve 13, and the sleeve ring 9 hinged to the I-shaped part 6 through a hinge rod 8.

[0040] Specifically, the threaded rod 5 is coaxially arranged with the rotating cylinder 4, and the threaded sleeve 13 is slidably connected to the guide rod 14 arranged on the mounting plate 2. Under the restriction of the guide rod 14, when the threaded rod 5 rotates, it can only drive the threaded sleeve 13 to move up and down along the axial direction of the threaded rod 5.

[0041] Initially, the threaded sleeve 13 is close to the I-shaped part 6. At this time, under the connection of the fixed-length hinge rod 8, the two sets of I-shaped parts 6 drive the two sets of clamping rollers 3 to move away from each other, so that the two sets of clamping rollers 3 will gradually form a larger gap, so that the operator can place the high-pressure mica tape between the two sets of clamping rollers 3. After the high-pressure mica tape is placed between the two sets of clamping rollers 3, the threaded rod 5 is rotated, driving the threaded sleeve 13 to move the sleeve ring 9 away from the I-shaped part 6. During this process, the cooperation between the sleeve ring 9 and the hinge rod 8 can pull the two sets of I-shaped parts 6 closer to each other, so that the two sets of clamping rollers 3 can clamp the high-pressure mica tape, thereby completing the first fixation of the high-pressure mica tape to the mounting plate 2, so as to facilitate the subsequent tensile test.

[0042] Furthermore, please refer to Figures 1-9 The mounting plate 2 is also provided with a winding structure. The winding structure is connected to the moving structure through a driving member. The driving member can drive the moving structure and the winding structure to move sequentially. When the winding structure moves, the two sets of clamping members can rotate with the rotating cylinder 4.

[0043] The winding structure includes a rotating rod 11 rotatably mounted on the mounting plate 2, and a gear 12 is coaxially arranged on the rotating rod 11. The gear 12 meshes with a toothed structure 401 that is equidistantly arranged along the circumferential direction of the rotating cylinder 4.

[0044] The driving component includes a second sleeve 16 sleeved on the rotating rod 11 and a first sleeve 15 sleeved on the driving rod 10. The first sleeve 15 is fixedly connected to the second sleeve 16, and a first protrusion 1501 and a second protrusion 1601 are respectively formed on the inner walls of the first sleeve 15 and the second sleeve 16.

[0045] Specifically, the mounting plate 2 is further provided with a support plate 201, on which an electric telescopic rod 7 is fixedly mounted. The telescopic end of the electric telescopic rod 7 is fixedly connected to the first sleeve 15. When the electric telescopic rod 7 is activated, it can push the first sleeve 15 and the second sleeve 16 to move along the axial direction of the rotating cylinder 4. During the movement of the first sleeve 15 and the second sleeve 16, the cooperation between the first protrusion 1501 and the second protrusion 1601 and the composite groove and the fitting groove can drive the drive rod 10 and the rotating rod 11 to move sequentially, so that the clamping roller 3 can first clamp the high-pressure mica tape and then wind the high-pressure mica tape, so that a stable connection is formed between the high-pressure mica tape and the mounting plate 2.

[0046] The first protrusion 1501 is slidably disposed in a composite groove opened on the outer wall of the drive rod 10, the composite groove including a first vertical groove 1001 and a threaded groove 1002;

[0047] The second protrusion 1601 is slidably disposed in a fitting groove opened on the outer wall of the rotating rod 11, the fitting groove including a rotating groove 1101 and a second vertical groove 1102;

[0048] In particular, please see Figure 8 The length of the first vertical groove 1001 is the same as the height of the rotating groove 1101, and the length of the second vertical groove 1102 is the same as the height of the second vertical groove 1102.

[0049] In the initial state, the telescopic end of the electric telescopic rod 7 is in an outward extension state. At this time, the first protrusion 1501 is located at the end of the stroke of the threaded groove 1002, the second protrusion 1601 is located at the end of the stroke of the second vertical groove 1102, and the threaded sleeve 13 is close to the I-shaped part 6.

[0050] When fixing the high-pressure mica tape to the mounting plate 2, first place the high-pressure mica tape between the two sets of clamping rollers 3, and then start the electric telescopic rod 7; immediately, the electric telescopic rod 7 retracts backward to pull the first sleeve 15 and the second sleeve 16. During this process, the first protrusion 1501 cooperates with the threaded groove 1002, which can drive the threaded rod 5 to rotate, so that the threaded sleeve 13 drives the connecting ring 9 to gradually move away from the I-shaped part 6, thereby clamping the high-pressure mica tape with the two sets of clamping rollers 3; during this process, the second protrusion 1501... The first protrusion 1601 slides along the second vertical groove 1102, maintaining the state of the rotating rod 11 and the rotating cylinder 4. When the first protrusion 1501 engages with the first vertical groove 1001, the second protrusion 1601 moves to engage with the rotating groove 1101. At this point, the two sets of clamping rollers 3 complete the clamping action on the high-pressure mica strip. Immediately afterwards, as the electric telescopic rod 7 continues to retract, the first protrusion 1501 slides within the first vertical groove 1001, allowing the two sets of clamping rollers 3 to maintain a fixed position on the high-pressure mica strip. In the clamping state, during this process, the second protrusion 1601 cooperates with the rotating groove 1101 to drive the rotating rod 11 to rotate continuously in the same direction. Then, the gear 12 and the tooth structure 401 enter the meshing transmission state, which can drive the rotating cylinder 4 and the clamping roller 3 to rotate, winding the high-pressure mica tape onto the two sets of clamping rollers 3. Until the electric telescopic rod 7 moves to the end of its stroke, the electric telescopic rod 7 automatically stops. At this time, the first protrusion 1501 moves to the end of the stroke of the first vertical groove 1001, and the second protrusion 1601 moves to the end of the stroke of the rotating groove 1101. The high-pressure mica tape is wound around the clamping roller 3 multiple times. During the subsequent upward movement of the upper plate 101, the high-pressure mica tape is tensioned. At this time, the connection between the high-pressure mica tape wound on the clamping roller 3 and the clamping roller 3 is tighter, thereby improving the connection stability and firmness between the high-pressure mica tape and the mounting plate 2, thereby reducing the possibility of slippage or displacement of the high-pressure mica tape and the mounting plate 2 during the test, and improving the accuracy of the final test data.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for testing the thermal elongation of high-pressure mica tape, comprising a longitudinal frame (1), wherein a liftable mounting plate (2) is provided on the longitudinal frame (1), and a clamping assembly is provided on the mounting plate (2); characterized in that: The clamping assembly includes a rotating cylinder (4) rotatably mounted on the mounting plate (2). The rotating cylinder (4) is provided with two sets of clamping members at equal intervals along its circumference. The two sets of clamping members are connected to a movable structure provided on the mounting plate (2). The movable structure can drive the two sets of clamping members to move closer to each other. The mounting plate (2) is also provided with a winding structure. The winding structure is connected to the moving structure through a driving member. The driving member can drive the moving structure and the winding structure to move sequentially. When the winding structure moves, the two sets of clamping members can rotate with the rotating cylinder (4).

2. The device for testing the thermal elongation of high-pressure mica tape according to claim 1, characterized in that, The clamping component includes an I-shaped component (6) that is slidably disposed on the rotating cylinder (4), and a clamping roller (3) is disposed on the I-shaped component (6).

3. The device for testing the thermal elongation of high-pressure mica tape according to claim 2, characterized in that, The movable structure includes a drive rod (10) rotatably mounted on the mounting plate (2), a threaded rod (5) coaxially mounted on the drive rod (10), a threaded sleeve (13) threadedly connected to the threaded rod (5), a sleeve ring (9) rotatably mounted on the threaded sleeve (13), and the sleeve ring (9) hinged to the I-shaped part (6) through a hinge rod (8).

4. The device for testing the thermal elongation of high-pressure mica tape according to claim 3, characterized in that, The winding structure includes a rotating rod (11) rotatably mounted on the mounting plate (2), and a gear (12) is coaxially arranged on the rotating rod (11). The gear (12) meshes with toothed structures (401) equidistantly arranged along the circumferential direction of the rotating cylinder (4).

5. The device for testing the thermal elongation of high-pressure mica tape according to claim 4, characterized in that, The driving component includes a second sleeve (16) sleeved on the rotating rod (11) and a first sleeve (15) sleeved on the driving rod (10). The first sleeve (15) is fixedly connected to the second sleeve (16), and a first protrusion (1501) and a second protrusion (1601) are respectively formed on the inner walls of the first sleeve (15) and the second sleeve (16).

6. The device for testing the thermal elongation of high-pressure mica tape according to claim 5, characterized in that, The first protrusion (1501) is slidably disposed in a composite groove opened on the outer wall of the drive rod (10), the composite groove including a first vertical groove (1001) and a threaded groove (1002).

7. The device for testing the thermal elongation of high-pressure mica tape according to claim 5, characterized in that, The second protrusion (1601) is slidably disposed in the fitting groove opened on the outer wall of the rotating rod (11), the fitting groove including a rotating groove (1101) and a second vertical groove (1102).

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