High-efficiency thermal extension test device
The high-efficiency thermal stretching test device with electric control automates the replacement of axial slices of the cable outer sheath and the addition of weights, solving the safety risks and time waste caused by manual operation in the existing technology, and realizing efficient and safe thermal stretching test.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGSHU ENVIRONMENTAL TESTING EQUIP CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-19
AI Technical Summary
Existing cable thermal elongation testing equipment requires manual operation when changing the axial slice of the cable outer sheath or adding weights, which leads to safety risks and wasted time in high-temperature environments.
The high-efficiency thermal extension test device, consisting of a second electric telescopic rod, an electric heating tube, a temperature sensor, and a PLC controller, enables automatic replacement of axial slices of the cable outer sheath and rapid addition of weights through electric control, avoiding manual operation.
It enables automated operation in high-temperature environments, improves the efficiency and safety of replacing axial sections of the cable outer sheath, reduces the risk of personal injury, and saves testing time.
Smart Images
Figure CN224262922U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing equipment technology, specifically a high-efficiency thermal extension testing device. Background Technology
[0002] Cross-linked cable is short for cross-linked polyethylene insulated cable. Cross-linked cables typically refer to cables whose insulation layer uses cross-linked materials. Cross-linked cables are suitable for power transmission and distribution lines with AC voltages of 500kV and below. If cross-linked polyethylene insulation and sheathing are used, a thermal elongation test must be performed. The thermal elongation test is an important indicator for verifying the mechanical and physical properties of the cable insulation layer, and whether the thermal elongation test is qualified is a crucial indicator affecting the normal use of the cable.
[0003] In existing cable thermal elongation test chambers, the mounting device, which attaches the axial slice of the cable's outer sheath, is typically placed directly into the chamber by hand. When changing the axial slice or adding weights, the mounting device must be manually removed after opening the chamber door. Because the temperature inside the chamber is high, directly inserting hands could easily cause burns. It is necessary to wait for the temperature inside the chamber to drop before proceeding, which wastes testing time and endangers personal safety. Therefore, we propose a high-efficiency thermal elongation test device. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a high-efficiency thermal elongation test device that can easily replace the axial slice of the cable outer sheath during use, and can quickly add weights as needed without manual insertion, thus effectively solving the problems in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency thermal stretching test device, comprising a test chamber and a clamping assembly;
[0006] Test chamber: A second electric telescopic rod is installed on the upper left side inside the test chamber. A connecting frame is fixed on the telescopic arm of the second electric telescopic rod. An electric heating tube is installed on the right side inside the test chamber. A measuring ruler and a temperature sensor are installed on the rear side inside the test chamber. A weight-adding component is installed on the lower side inside the test chamber.
[0007] Clamping assembly: includes a fixed frame, an inclined moving block, a clamping plate, and a spring. The fixed frame is fixed to the upper side of the connecting frame. Two corresponding openings are opened on the left and right sides of the fixed frame. An inclined moving block is slidably connected inside the opening. Two corresponding clamping plates are arranged inside the fixed frame. The two clamping plates are respectively fixed to the sides of the two inclined moving blocks. A spring is sleeved on the side of the inclined moving block. One end of the spring is fixed to the side of the adjacent clamping plate, and the other end of the spring is fixed to the side inside the fixed frame. A hooking assembly is arranged between the two clamping plates. A pressing assembly is arranged on the side of the fixed frame. A moving assembly is installed on the upper side of the fixed frame. The moving assembly is connected to the pressing assembly. The clamping assembly is used to clamp the axial slice of the cable outer sheath.
[0008] Wherein: the input ends of the second electric telescopic rod and the electric heating tube are both electrically connected to the output end of an external PLC controller, and the temperature sensor is bidirectionally electrically connected to the external PLC controller.
[0009] Furthermore, the moving component includes a fixed frame, a threaded rod, and a motor. The fixed frame is fixed to the upper side of the fixed frame, and the motor is mounted on the upper side of the fixed frame. The threaded rod is fixed to the output shaft of the motor. The input end of the motor is electrically connected to the output end of an external PLC controller. The moving component drives the extrusion component to move.
[0010] Furthermore, the extrusion assembly includes a U-shaped frame, a connecting frame, and an inclined extrusion block. The connecting frame is slidably connected to the side of the fixed frame. Two corresponding openings are opened on the left and right sides of the connecting frame. An inclined extrusion block is fixed inside the opening and fits against the inclined moving block. A U-shaped frame is fixed to the upper side of the connecting frame and is slidably connected inside the fixed frame. A threaded hole is opened on the upper side of the U-shaped frame, and a threaded rod is threaded into the threaded hole. The extrusion assembly is used to extrude the two inclined moving blocks.
[0011] Furthermore, the mounting assembly includes an axial slice of the cable outer sheath, a hook, a counterweight frame, a first weight, and a guide tube. The axial slice of the cable outer sheath is disposed between the two clamping plates. A connecting hole is provided on the lower side of the axial slice of the cable outer sheath. A hook is hung inside the connecting hole. A counterweight frame is fixed to the lower end of the hook. The first weight is sleeved on the surface of the counterweight frame. A guide tube is fixed to the upper side of the test chamber. The counterweight frame is located inside the guide tube and is connected to the weight-increasing assembly through the setting of the counterweight frame.
[0012] Furthermore, the weight-increasing component includes a fixed frame, a first electric telescopic rod, a compression block, a placement tube, second weights, and a first metal strip. The fixed frame is fixed to the lower side inside the test chamber. The first electric telescopic rod is installed on the left side of the fixed frame. A compression block is fixed to the telescopic arm of the first electric telescopic rod. An installation hole is opened on the right side of the fixed frame, and a guide tube is fixed inside the installation hole. A placement tube is fixed to the upper side of the fixed frame. A first metal strip is fixed inside the placement tube. Evenly distributed second weights are placed inside the placement tube, with the first metal strip located inside all the second weights on the upper side. A push-out port is opened at the lower end of the circumferential surface of the placement tube. The compression block corresponds to the push-out port. The input end of the first electric telescopic rod is electrically connected to the output end of an external PLC controller. The weight of the counterweight frame is increased by setting up the weight-increasing component.
[0013] Furthermore, a transparent baffle is hinged to the front side of the test chamber, and a second metal strip is fixed to the front side of the transparent baffle. A groove is opened on the front side of the test chamber, and a magnet is fixed inside the groove. The magnet is attracted to the second metal strip, and the test chamber is sealed by setting the transparent baffle.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This high-efficiency thermal stretching test device has the following advantages:
[0015] 1. By setting a second electric telescopic rod, the sealing cover can be removed when the axial slice of the cable outer sheath needs to be replaced. After the sealing cover is removed, the second electric telescopic rod is controlled to retract, causing the connecting frame to move upward. The upward movement of the connecting frame drives the fixed frame to move upward, thereby moving the axial slice of the cable outer sheath upward to the outside of the test chamber. Then, the moving component is controlled to separate the two inclined pressing blocks from the two inclined moving blocks. After separation, the two clamping plates will separate from the axial slice of the cable outer sheath under the action of two springs. After separation, it can be removed and then replaced.
[0016] 2. By setting up a weight-increasing component, the first electric telescopic rod can be activated as needed during the test to move the compression block to the right. The movement of the compression block to the right drives the second weight on the lower side to move to the right and connect with the counterweight frame. After connection, the gravity suffered by the axial slice of the cable outer sheath can be increased, thus avoiding the need for manual insertion. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the front structure of this utility model;
[0018] Figure 2 This is a front sectional view of the present invention;
[0019] Figure 3This is a schematic diagram of the structure of the mobile component of this utility model;
[0020] Figure 4 This is a schematic diagram of the structure of the hanging-up appliance component of this utility model;
[0021] Figure 5 This is a schematic diagram of the extrusion assembly structure of this utility model.
[0022] In the diagram: 1 Test chamber, 2 Clamping assembly, 21 Fixed frame, 22 Inclined moving block, 23 Clamping plate, 24 Spring, 3 Moving assembly, 31 Fixed frame, 32 Threaded rod, 33 Motor, 4 Extrusion assembly, 41 U-shaped frame, 42 Connecting frame, 43 Inclined extrusion block, 5 Hanging assembly, 51 Axial slice of cable outer sheath, 52 Hook, 53 Counterweight frame, 54 First weight, 55 Guide tube, 6 Weight-adding assembly, 61 Fixed frame, 62 First electric telescopic rod, 63 Extrusion block, 64 Placement tube, 65 Second weight, 66 First metal strip, 7 Transparent baffle, 8 Second metal strip, 9 Magnet, 10 Sealing cover, 11 Second electric telescopic rod, 12 Connecting frame, 13 Heating tube, 14 Temperature sensor, 15 Measuring ruler. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Please see Figure 1-5 This embodiment provides a technical solution: a high-efficiency thermal stretching test device, including a test chamber 1 and a clamping assembly 2;
[0025] Test chamber 1: A second electric telescopic rod 11 is installed on the upper left side inside. A connecting frame 12 is fixed on the telescopic arm of the second electric telescopic rod 11. An electric heating tube 13 is installed on the right side inside the test chamber 1. A measuring ruler 15 and a temperature sensor 14 are installed on the rear side inside the test chamber 1. A weight-increasing component 6 is installed on the lower side inside the test chamber 1. The weight-increasing component 6 includes a fixing frame 61, a first electric telescopic rod 62, a pressing block 63, a placement tube 64, a second weight 65, and a first metal strip 66. A fixing frame 61 is fixed on the lower side inside the test chamber 1. The first electric telescopic rod 62 is installed on the left side of the fixing frame 61. The extension of the first electric telescopic rod 62... An extrusion block 63 is fixed on the retractable arm. An installation hole is provided on the right side of the fixing frame 61. A guide tube 55 is fixed inside the installation hole. A placement tube 64 is fixed on the upper side of the fixing frame 61. A first metal strip 66 is fixed inside the placement tube 64. A second weight 65 is evenly distributed inside the placement tube 64. The first metal strip 66 is located inside all the second weights 65 on the upper side. A push port is provided at the lower end of the circumferential surface of the placement tube 64. The extrusion block 63 corresponds to the push port. The input end of the first electric telescopic rod 62 is electrically connected to the output end of an external PLC controller. The weight of the counterweight frame 53 is increased by setting the weight-increasing component 6.
[0026] Clamping assembly 2 includes a fixed frame 21, an inclined moving block 22, a clamping plate 23, and a spring 24. The fixed frame 21 is fixed to the upper side of the connecting frame 12. Two corresponding openings are formed on the left and right sides of the fixed frame 21. An inclined moving block 22 is slidably connected inside each opening. Two corresponding clamping plates 23 are disposed inside the fixed frame 21. The two clamping plates 23 are respectively fixed to the sides of the two inclined moving blocks 22. A spring 24 is sleeved on the side of each inclined moving block 22. One end of the spring 24 is fixed to the side of the adjacent clamping plate 23, and the other end of the spring 24 is fixed inside the fixed frame 21. On the side, a hanging assembly 5 is provided between the two clamping plates 23. An extrusion assembly 4 is provided on the side of the fixed frame 21. A moving assembly 3 is installed on the upper side of the fixed frame 21 and is connected to the extrusion assembly 4. The moving assembly 3 includes a fixed frame 31, a threaded rod 32, and a motor 33. The fixed frame 31 is fixed on the upper side of the fixed frame 21, and the motor 33 is installed on the upper side of the fixed frame 31. A threaded rod 32 is fixed on the output shaft of the motor 33. The input end of the motor 33 is electrically connected to the output end of an external PLC controller. The extrusion assembly 4 includes a U-shaped frame 41, a connecting frame 42, and an inclined extrusion block 43. A connecting frame 42 is slidably connected to the side of the fixed frame 21. Two corresponding openings are opened on the left and right sides of the connecting frame 42. An inclined pressing block 43 is fixed inside each opening, and the inclined pressing block 43 fits against the inclined moving block 22. A U-shaped frame 41 is fixed to the upper side of the connecting frame 42, and the U-shaped frame 41 is slidably connected inside the fixed frame 31. A threaded hole is opened on the upper side of the U-shaped frame 41, and a threaded rod 32 is threaded into the threaded hole. The two inclined moving blocks 22 are pressed by the pressing component 4. The hanging component 5 includes an axial slice 51 of the cable outer sheath, a hook 52, a counterweight frame 53, and a first weight. The test chamber 1 is equipped with a guide tube 55 and a cable outer sheath axial slice 51 between two clamping plates 23. The lower side of the cable outer sheath axial slice 51 is provided with a connecting hole. A hook 52 is hung inside the connecting hole. A counterweight frame 53 is fixed at the lower end of the hook 52. A first weight 54 is sleeved on the surface of the counterweight frame 53. A guide tube 55 is fixed on the upper side of the test chamber 1. The counterweight frame 53 is located inside the guide tube 55. The counterweight frame 53 is connected to the weight-increasing component 6. The moving component 3 drives the extrusion component 4 to move. The clamping component 2 clamps the cable outer sheath axial slice 51.
[0027] The input ends of the second electric telescopic rod 11 and the electric heating tube 13 are both electrically connected to the output end of the external PLC controller, and the temperature sensor 14 is bidirectionally electrically connected to the external PLC controller.
[0028] Wherein: a transparent baffle 7 is hinged to the front side inside the test chamber 1, a second metal strip 8 is fixed to the front side of the transparent baffle 7, a groove is opened on the front side of the test chamber 1, a magnet 9 is fixed inside the groove, the magnet 9 is attracted together with the second metal strip 8, and the test chamber 1 is sealed by setting the transparent baffle 7.
[0029] The working principle of the high-efficiency thermal extension testing device provided by this utility model is as follows: During use, the motor 33 can be started to rotate the threaded rod 32. The rotation of the threaded rod 32 drives the U-shaped frame 41 to move downwards, which in turn drives the connecting frame 42 to move downwards. The downward movement of the connecting frame 42 drives the two inclined extrusion blocks 43 to press down on the two inclined moving blocks 22. After pressing, the two clamping plates 23 move to fix the axial slice 51 of the cable outer sheath. After fixing, the heating tube 13 is started to increase the temperature inside the test chamber 1. At this time, the temperature sensor 14 detects the temperature inside the test chamber 1. When the temperature inside the test chamber 1 is too high, the external PLC controller automatically controls the heating tube 13 to turn off. This avoids the temperature inside the test chamber 1 from becoming too high. During the thermal extension test, the first electric telescopic rod 62 can be started to move the extrusion block 63 to the right. The rightward movement of the extrusion block 63... The second weight 65 on the lower side moves to the right and connects with the counterweight frame 53. After connection, the gravity on the axial slice 51 of the cable outer sheath can be increased. At this time, the extension efficiency of the axial slice 51 of the cable outer sheath can be known by observing the extension degree of the axial slice 51 of the cable outer sheath. When it is necessary to replace the axial slice 51 of the cable outer sheath, the sealing cover 10 can be removed. After the sealing cover 10 is removed, the second electric telescopic rod 11 is controlled to retract, causing the connecting frame 12 to move upward. The upward movement of the connecting frame 12 drives the fixed frame 21 to move upward, thereby moving the axial slice 51 of the cable outer sheath upward to the outside of the test chamber 1. Then, the motor 33 is controlled to rotate, causing the two inclined pressing blocks 43 to separate from the two inclined moving blocks 22. After separation, the two clamping plates 23 will separate from the axial slice 51 of the cable outer sheath under the action of the two springs 24. After separation, it can be removed and then replaced.
[0030] It is worth noting that the external PLC controller disclosed in the above embodiments is specifically a Siemens S7-200. The first electric telescopic rod 62, the second electric telescopic rod 11, the motor 33, the heating element 13, and the temperature sensor 14 can be freely configured according to the actual application scenario. The external PLC controller controls the operation of the first electric telescopic rod 62, the second electric telescopic rod 11, the motor 33, and the heating element 13 using methods commonly used in the prior art.
[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A high-efficiency thermal stretching test apparatus, characterized in that: Includes a test chamber (1) and a clamping assembly (2); Test chamber (1): A second electric telescopic rod (11) is installed on the upper left side inside the test chamber (1). A connecting frame (12) is fixed on the telescopic arm of the second electric telescopic rod (11). An electric heating tube (13) is installed on the right side inside the test chamber (1). A measuring ruler (15) and a temperature sensor (14) are installed on the rear side inside the test chamber (1). A weight-adding component (6) is installed on the lower side inside the test chamber (1). Clamping assembly (2): includes a fixed frame (21), an inclined moving block (22), a clamping plate (23), and a spring (24). The fixed frame (21) is fixed on the upper side of the connecting frame (12). Two corresponding openings are opened on the left and right sides of the fixed frame (21). The inclined moving block (22) is slidably connected inside the opening. Two corresponding clamping plates (23) are provided inside the fixed frame (21). The two clamping plates (23) are respectively fixed on the sides of the two inclined moving blocks (22). A spring (24) is sleeved on the side of the inclined moving block (22). One end of the spring (24) is fixed on the side of the adjacent clamping plate (23), and the other end of the spring (24) is fixed on the side inside the fixed frame (21). A hanging assembly (5) is provided between the two clamping plates (23). A pressing assembly (4) is provided on the side of the fixed frame (21). A moving assembly (3) is installed on the upper side of the fixed frame (21). The moving assembly (3) is connected to the pressing assembly (4). Wherein: the input ends of the second electric telescopic rod (11) and the electric heating tube (13) are both electrically connected to the output end of the external PLC controller, and the temperature sensor (14) is bidirectionally electrically connected to the external PLC controller.
2. The high-efficiency thermal stretching test apparatus according to claim 1, characterized in that: The moving component (3) includes a fixed frame (31), a threaded rod (32) and a motor (33). The fixed frame (31) is fixed on the upper side of the fixed frame (21), and the motor (33) is mounted on the upper side of the fixed frame (31). The threaded rod (32) is fixed on the output shaft of the motor (33), and the input end of the motor (33) is electrically connected to the output end of an external PLC controller.
3. The high-efficiency thermal stretching test apparatus according to claim 2, characterized in that: The extrusion assembly (4) includes a U-shaped frame (41), a connecting frame (42), and an inclined extrusion block (43). The connecting frame (42) is slidably connected to the side of the fixed frame (21). The connecting frame (42) has two corresponding openings on its left and right sides. An inclined extrusion block (43) is fixed inside the opening. The inclined extrusion block (43) is in contact with the inclined moving block (22). The U-shaped frame (41) is fixed to the upper side of the connecting frame (42). The U-shaped frame (41) is slidably connected to the inside of the fixed frame (31). A threaded hole is opened on the upper side of the U-shaped frame (41). The threaded rod (32) is threadedly connected to the inside of the threaded hole.
4. The high-efficiency thermal stretching test apparatus according to claim 1, characterized in that: The mounting assembly (5) includes an axial slice of the cable outer sheath (51), a hook (52), a counterweight frame (53), a first weight (54), and a guide tube (55). The axial slice of the cable outer sheath (51) is provided between the two clamping plates (23). A connecting hole is provided on the lower side of the axial slice of the cable outer sheath (51). The hook (52) is hung inside the connecting hole. The lower end of the hook (52) is fixed with the counterweight frame (53). The first weight (54) is sleeved on the surface of the counterweight frame (53). The guide tube (55) is fixed on the upper side of the test chamber (1). The counterweight frame (53) is located inside the guide tube (55).
5. The high-efficiency thermal stretching test apparatus according to claim 4, characterized in that: The weight-adding component (6) includes a fixing frame (61), a first electric telescopic rod (62), a compression block (63), a placement tube (64), a second weight (65), and a first metal strip (66). The fixing frame (61) is fixed to the lower side inside the test chamber (1). The first electric telescopic rod (62) is installed on the left side of the fixing frame (61). The compression block (63) is fixed on the telescopic arm of the first electric telescopic rod (62). An installation hole is opened on the right side of the fixing frame (61). The guide tube (55) is fixed inside the installation hole. The upper side of the fixed frame (61) is fixed with a placement tube (64), the inside of the placement tube (64) is fixed with a first metal strip (66), the inside of the placement tube (64) is filled with evenly distributed second weights (65), the first metal strip (66) is located inside all the second weights (65) on the upper side, the lower end of the circumferential surface of the placement tube (64) is provided with a push port, the extrusion block (63) corresponds to the push port, and the input end of the first electric telescopic rod (62) is electrically connected to the output end of an external PLC controller.
6. The high-efficiency thermal stretching test apparatus according to claim 1, characterized in that: A transparent baffle (7) is hinged to the front side inside the test chamber (1). A second metal strip (8) is fixed to the front side of the transparent baffle (7). A groove is opened on the front side of the test chamber (1). A magnet (9) is fixed inside the groove. The magnet (9) is attracted to the second metal strip (8).