Automatic load-removing intelligent thermal extension inspection device
By designing an automatic deload intelligent thermal extension inspection device, and using the sample clip and deload device to automatically release the sample, the problem of opening the test chamber door in traditional methods is solved, and the accuracy and safety of the test are improved.
Patent Information
- Application Number
- CN202420874909.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-04-25
AI Technical Summary
During the cable thermal extension test, the weight needs to be removed immediately when the duration expires, but traditional methods require opening the test chamber door, which may cause damage to the sample, burns in personnel, and a drop in the temperature in the test chamber, affecting the test results.
Design an automatic load-removing intelligent thermal extension inspection device. By setting up a sample clip and a load-removing device, the sample dumbbell sample is automatically released without opening the box door, so that the weight and dumbbell sample fall together. Hook to prevent the sample from falling to the bottom of the sample holder.
Automatic load removal is achieved, the risk of manual operation is avoided, the accuracy and safety of the test is ensured, and the impact of sample damage and temperature drop on the detection results are avoided.
Smart Images
Figure CN222505984U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of thermal extension test devices, and in particular relates to an automatic load-removing intelligent thermal extension testing device. Background Art
[0002] The test process of cable thermal extension requires the preparation of standard sample dumbbells and marking lines on the sample dumbbells, such as drawing a 20mm or 10mm vertical marking line, or two horizontal marking lines with an interval of 20mm or 10mm; the marking lines on the sample dumbbells should be clear and have a large color difference with the sample color. First, preheat the test box, then drop a weight of a certain weight on the lower end of the sample dumbbell, clamp the upper end of the sample dumbbell on the sample rack with a clip, and place the sample rack in the test box. After the test box meets the test temperature requirements, place the sample suspension in the test box, close the door, and start the test; when the set time expires, remove the weight, wait for the dumbbell to shrink thermally within the standard time, take the dumbbell out of the box and cool it naturally to room temperature. The test results are obtained by measuring the length change of the marking line on the sample dumbbell or the interval change of the two marking lines.
[0003] When the time expires, the weight needs to be written down immediately. The traditional process of removing the weight requires the staff to open the box door and use scissors to cut off the sample dumbbell piece from a position close to the weight. However, in the process of cutting, the sample dumbbell piece may be pulled and affect the test results. In addition, the higher temperature after opening the box door can easily cause burns to people. Opening the box door will also cause the temperature in the test box to drop, affecting the subsequent mark change test results. Utility Model Content
[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide an automatic unloading intelligent thermal extension testing device, which can release the sample dumbbell sample without opening the box door, so that the weight and the dumbbell sample fall together on the hook of the work station, and at the same time make the dumbbell sample in a free state to avoid the sample dumbbell sample falling to the bottom of the sample rack together with the sample.
[0005] The technical solution of the utility model is as follows:
[0006] An automatic unloading intelligent thermal extension testing device comprises a box body and a test chamber arranged in the box body, wherein a sample rack is arranged in the test chamber, and a weight is suspended at the end of a dumbbell sample through a tail clip;
[0007] The top of the sample rack is provided with a horizontal frame, on which a plurality of sample clamps are arranged, and a movable rod is vertically arranged on the upper part of the sample clamp, the upper end of the movable rod is the highest end of the sample clamp, and the movable rod can move up and down relative to the sample rack; the lower part of the sample clamp has a jaw that can clamp the dumbbell sample, the jaw is normally closed in a natural state, the jaw is controlled by the movable rod, and the jaw is opened when the movable rod moves downward;
[0008] A hanger is provided at the lower part of the sample rack, the hanger corresponds to the position of the tail clip, a plurality of hanging rods are provided on the hanger, the number of the hanging rods corresponds to the tail clips one by one, a hanging ring is fixed on one side of the tail clip, and the hanging rod is within the downward projection range of the hanging ring;
[0009] A load-removing device is provided on the box body, and the load-removing device includes a holding rod that can move up and down, the holding rod extends downward into the test chamber, and a pressing plate is fixed at the lower end of the holding rod; the pressing plate is provided corresponding to the movable rod;
[0010] The downward movement of the holding rod drives the pressing plate to move downward and press the movable rod downward, the jaws open, the dumbbell sample is released, and the hanging ring falls and is sleeved on the hanging rod.
[0011] Furthermore, the sample clamp includes a reset member for keeping the sample clamp in a normally closed state, a clamp fixing plate installed on the upper part of the sample holder, a left clamp arm and a right clamp arm whose upper ends are rotatably connected to the clamp fixing plate, and a connecting rod mechanism for driving the left clamp arm and the right clamp arm to open and close; a left clamp block is fixed at the lower end of the left clamp arm, and a right clamp block is fixed at the lower end of the right clamp arm, the left clamp block and the right clamp block form a jaw, and the left clamp block and the right clamp block are tightly attached to clamp the dumbbell sample when the left clamp arm and the right clamp arm are closed; a movable rod is vertically arranged on the connecting rod mechanism, and the upper end of the movable rod is the highest end of the sample clamp.
[0012] Furthermore, the connecting rod mechanism includes a middle connecting frame horizontally arranged between the left clamp arm and the right clamp arm and a connecting plate rotatably connected to the left and right ends of the middle connecting frame, the other end of the connecting plate is tilted downward and rotatably connected to the middle and lower part of the left clamp arm or the right clamp arm; the lower end of the movable rod is fixed in the center of the middle connecting frame.
[0013] Furthermore, a plurality of openings are provided on the top of the sample rack, and a slide bar block is provided in the opening, and the slide bar block is fixed on the clamp fixing plate; a slide bar hole is provided at the center of the slide bar block, and the movable rod slides through the slide bar hole.
[0014] Furthermore, a washer is fixed to the lower side of the clamp fixing plate, and the movable rod passes through the washer.
[0015] Furthermore, a rod head is fixed to the upper end of the movable rod, and the size of the rod head is larger than the diameter of the movable rod.
[0016] Furthermore, the reset member is a compression spring, and the compression spring is passed through the upper part of the movable rod.
[0017] Furthermore, the left clamp arm and the right clamp arm are arch-shaped, and the cross-sections of the left clamp block and the right clamp block are rectangular or concave.
[0018] Furthermore, the unloading device also includes a bracket installed on the top of the box, a motor installed on the top of the bracket, a screw rod and a guide rail vertically installed in the bracket, a slider installed in cooperation with the screw rod and the guide rail, and a rod fixing plate fixed on the slider, and the upper end of the holding rod passes through the box and is fixed on the rod fixing plate.
[0019] Furthermore, the outer cover of the load-removing device is provided with a protective cover.
[0020] Furthermore, six sample clamps are arranged on the horizontal frame, and the upper end of one of the scales is fixed on the horizontal frame and arranged in the center.
[0021] Compared with the prior art, the beneficial effects of the utility model are:
[0022] The utility model provides a sample clamp and a load-removing device. The load-removing device can trigger the sample clamp to change the state from being closed and clamping the dumbbell sample to an open state, release the dumbbell sample and the weight, and realize automatic load removal. There is no need to open the test chamber door, which avoids manual load removal, can ensure the simultaneous release of the dumbbell samples, and ensure the accuracy of the test. The wedge is provided with a hanging rack and a matching hanging ring on the tail clamp, so that when the dumbbell sample is released, it falls onto the hook of the work station together with the weight, so that the dumbbell sample is in a free state, so as to avoid the dumbbell sample falling to the bottom of the sample rack together with the sample. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.
[0024] Figure 2 It is a schematic diagram of the cooperation between the unloading device and the sample clamp according to an embodiment of the utility model.
[0025] Figure 3 The figure is a schematic diagram of the installation structure of the sample clamp according to the embodiment of the utility model.
[0026] Figure 4 This is a schematic front view of the installation of the sample clamp according to the embodiment of the utility model.
[0027] Figure 5The figure is a schematic structural diagram of a sample holder according to an embodiment of the utility model.
[0028] Figure 6 It is a schematic structural diagram of the sample clamp of the embodiment of the utility model when it is opened.
[0029] Figure 7 It is a schematic structural diagram of a load device according to an embodiment of the utility model.
[0030] In the figure, there are sample rack-1; unloading device-2, bracket-21, motor-22, rod fixing plate-23, holding rod-24, pressure plate-25, shield-3; sample clamp-4, left clamp block-41, right clamp block-42, left clamp arm-43, right clamp arm-44, middle connecting frame-45, connecting plate-46, movable rod-47, clamp fixing plate-48, slide rod block-49, reset part-50, rod head-51, washer-52; weight-5, ruler-6, cross frame-8, hanging rod-81, hanging ring-9, dumbbell sample-100. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] like Figures 1 to 7 As shown, an automatic unloading intelligent thermal extension test device comprises a box body, a test chamber arranged in the box body, wherein a sample rack 1 and a scale 6 are arranged in the test chamber; the scale 6 is preferably arranged in the middle of the sample rack 1;
[0033] The top of the sample rack 1 is provided with a horizontal frame, on which a plurality of sample clamps 4 are arranged, and the sample clamps 4 include a reset member 50 for keeping the sample clamps 4 in a normally closed state, a clamp fixing plate 48 installed on the upper part of the sample rack 1, a left clamp arm 43 and a right clamp arm 44 whose upper ends are rotatably connected to the clamp fixing plate 48, and a connecting rod mechanism for driving the left clamp arm 43 and the right clamp arm 44 to open and close; a left clamp block 41 is fixed at the lower end of the left clamp arm 43, and a right clamp block 42 is fixed at the lower end of the right clamp arm 44, and the left clamp block 41 and the right clamp block 42 are tightly attached to clamp the dumbbell sample 100 when the left clamp arm 43 and the right clamp arm 44 are closed; a movable rod 47 is vertically arranged on the connecting rod mechanism, and the upper end of the movable rod 47 is the highest end of the sample clamp 4, and the movable rod 47 can move up and down relative to the sample rack 1;
[0034] The end of the dumbbell sample 100 is suspended with a weight 5 through a tail clip. A hanger 8 is provided at the lower part of the sample rack 1. The hanger 8 corresponds to the position of the tail clip. A plurality of hanging rods 81 are provided on the hanger 8. The upper part of the hanging rod 81 is vertically upward, and the lowest point height of the hanging rod 81 is greater than the length of the dumbbell sample 100. The number of the hanging rods 81 corresponds to the tail clip one by one. A hanging ring 9 is fixed on one side of the tail clip, and the hanging rod 81 is within the range of the downward projection of the hanging ring 9. The hanger 8 is arranged on the side of the hanger 8 facing away from the test chamber door.
[0035] The box body is provided with a load-removing device 2, and the load-removing device 2 includes a holding rod 24 that can move up and down, and the holding rod 24 extends downward into the test chamber, and a pressing plate 25 is fixed to the lower end of the holding rod 24; the pressing plate 25 is arranged corresponding to the movable rod 47;
[0036] After the dumbbell sample 100 is installed, the hanging ring on the tail clamp is directly above the hanging rod; when the dumbbell sample 100 is pressed to remove the load by the unloading device, the dumbbell sample 100 is hung on the hanging rod together with the weight 5 and the tail clamp, so that the dumbbell sample is suspended in the air, so as to avoid the dumbbell sample 100 falling to the bottom of the test chamber together with the weight 5, and avoid the weight pressing the dumbbell sample to affect the thermal shrinkage; avoid the friction between the dumbbell sample 100 and the bottom surface of the test chamber caused by the dumbbell sample falling against the bottom metal to affect the thermal shrinkage; and because the bottom of the test chamber is close to the heating source of the equipment, the temperature here may be higher than the set temperature. After being released, the suspended dumbbell sample 100 no longer falls into the area with higher temperature at the bottom, which can avoid the dumbbell sample 100 from being affected by the high temperature here, so that the entire thermal extension test is within the specified test temperature range.
[0037] Further, such as Figures 2 to 6 As shown, the connecting rod mechanism includes a middle connecting frame 45 horizontally arranged between the left clamp arm 43 and the right clamp arm 44 and a connecting plate 46 rotatably connected to the left and right ends of the middle connecting frame 45, and the other end of the connecting plate 46 is tilted downward and rotatably connected to the middle and lower part of the left clamp arm 43 or the right clamp arm 44; the lower end of the movable rod 47 is fixed at the center of the middle connecting frame 45; the connecting rod mechanism has a simple structure and reliable operation, and when the middle connecting frame 45 is driven by the movable rod 47 to move downward, it can quickly and synchronously push and pull the left clamp arm 43 and the right clamp arm 44 to release the dumbbell specimen 100.
[0038] Further, such as Figures 2 to 4As shown, the top of the sample rack 1 is provided with a plurality of openings, and a slide block 49 is provided in the opening, and the slide block 49 is fixed on the clamp fixing plate 48; a slide hole is provided in the center of the slide block 49, and the movable rod 47 slides through the slide hole; the slide block 49 has a certain thickness, such as the slide block 49 can be similar to a plug type or a thick ring type, so as to realize the stable installation of the slide block 49 on the clamp fixing plate 48; at the same time, the slide hole also has a longer length, which can enable the movable rod 47 to move stably in the slide hole.
[0039] Further, such as Figure 6 As shown, a washer 52 is fixed to the lower side of the clamp fixing plate 48 , and the movable rod 47 passes through the washer 52 . The washer 52 serves as a safety to prevent the middle connecting frame 45 from accidentally directly hitting the sample rack 1 when resetting.
[0040] Further, such as Figures 2 to 6 As shown, a rod head 51 is fixed to the upper end of the movable rod 47, and the size of the rod head 51 is larger than the diameter of the movable rod 47; the upper surface of the rod head 51 is generally flat, so as to facilitate the triggering of the pressure plate 25; the rod head 51 is detachably installed on the upper part of the movable rod 47, and the rod head 51 serves as the upper limit of the compression spring, which is convenient for replacement when the compression spring fails; the rod head 51 can be installed on the upper end of the movable rod 47 by means of threaded connection or snap connection.
[0041] Preferably, Figures 1 to 6 As shown, the reset member 50 is a compression spring, which is passed through the upper end of the movable rod 47. The compression spring provides a restoring force, so that in a natural state, the left clamp arm 43 and the right clamp arm 44 can stably clamp the dumbbell sample 100 with a weight 5 at the lower end after closing; when the operator installs the dumbbell sample 100, the sample rack 1 is outside the test chamber, and the operator presses down the movable rod 47 with one hand, and then takes the upper end of the dumbbell sample 100 with the other hand and puts it into the jaws formed by the left clamp arm 43 and the right clamp arm 44, and then releases the hand pressing the movable rod 47 to release the movable rod 47, and the movable rod 47 can be reset under the action of the compression spring, so that the left clamp arm 43 and the right clamp arm 44 clamp the dumbbell sample 100.
[0042] Specifically, Figures 2 to 6 As shown, the left clamp arm 43 and the right clamp arm 44 are arched, and the cross-sections of the left clamp block 41 and the right clamp block 42 are rectangular or concave; the size of the opposite surfaces of the left clamp block 41 and the right clamp block 42 should be larger than the width of the upper end of the dumbbell specimen 100.
[0043] Further, such as Figure 1 , Figure 2 and Figure 7As shown, the load-removing device 2 also includes a bracket 21 installed on the top of the box, a motor 22 installed on the top of the bracket 21, a screw and a guide rail vertically installed in the bracket 21, a slider installed in cooperation with the screw and the guide rail, and a rod fixing plate 23 fixed on the slider, and the upper end of the holding rod 24 passes through the box and is fixed on the rod fixing plate 23; the load-removing device 2 can be regarded as a holding rod 24 and a pressure plate 25 driven by a linear motion module driven by the motor 22; specifically, three threaded connecting holes are provided on the holding rod 24, and the holding rod 24 is connected to the rod fixing plate 23 through a threaded pair of screws; the outer cover of the load-removing device 2 is provided with a protective cover 3; the load-removing device 2 can also adopt other structures as long as it can drive the holding rod 24 to move up and down.
[0044] In one embodiment, Figures 1 to 4 As shown, six sample clamps 4 are arranged on the horizontal frame, the upper end of one of the scales 6 is fixed on the horizontal frame and arranged in the center, and another scale 6 can be arranged on the column of the sample rack 1.
[0045] The load-removing working process of the utility model is:
[0046] The holding rod 24 moves downward to apply pressure to the sample clamp 4 on the sample rack 1. After the jaws of the sample clamp 4 are opened, the dumbbell sample 100 falls under the gravity of the weight 5, and the hanging ring is hung on the hanging stem, thereby achieving the purpose of automatically unloading the tested sample; at the same time, the dumbbell sample is in a suspended state, thereby preventing the dumbbell sample 100 from falling to the bottom of the test chamber together with the weight 5; thereafter, the holding rod 24 automatically returns after reaching the specified position under the drive of the motor 22, and at the same time, the compression spring on the sample clamp 4 is reset to drive the jaws of the sample clamp 4 to close.
[0047] This new device is used to measure the elongation and deformation of the insulation and sheath of wires and cables under heat and load, so as to determine the thermal extension performance of the insulation and sheath materials of wires and cables. Like the usual cable thermal extension test chamber, the instrument also has major components such as industrial measurement cameras, heating and temperature control devices, and control panels, which can automatically complete the measurement of the elongation of the sample in a high temperature environment; the tensile deformation process of the sample can be directly observed through digital image acquisition equipment; the test chamber and the industrial camera working area have over-temperature protection functions, making the instrument safer and more reliable.
[0048] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An automatic load-removing intelligent thermal extension testing device, characterized in that: The invention comprises a box body and a test chamber arranged in the box body, wherein a sample rack (1) is arranged in the test chamber, and a weight (5) is suspended at the end of a dumbbell sample (100) through a tail clip, and is characterized in that: The sample rack (1) has a cross frame at the top, and a plurality of sample clamps (4) are arranged on the cross frame. A movable rod (47) is vertically arranged on the upper part of the sample clamp (4). The upper end of the movable rod (47) is the highest end of the sample clamp (4), and the movable rod (47) can move up and down relative to the sample rack (1). The lower part of the sample clamp (4) has a jaw that can clamp the dumbbell sample (100). The jaw is normally closed in a natural state, and the jaw is controlled by the movable rod (47). When the movable rod (47) moves downward, the jaw opens. A hanger (8) is provided at the lower part of the sample rack (1), the hanger (8) corresponds to the position of the tail clip, a plurality of hanger rods (81) are provided on the hanger (8), the number of the hanger rods (81) corresponds to the number of the tail clips, a hanger ring (9) is fixed on one side of the tail clip, and the hanger rods (81) are within the range of the downward projection of the hanger ring (9); A load-removing device (2) is provided on the box body, and the load-removing device (2) comprises a holding rod (24) that can move up and down, the holding rod (24) extends downward into the test chamber, and a pressing plate (25) is fixed to the lower end of the holding rod (24); the pressing plate (25) is provided corresponding to the movable rod (47); The holding rod (24) moves downward, driving the pressing plate (25) to move downward and press the movable rod (47), the jaws open, the dumbbell specimen (100) is released, and the hanging ring (9) falls and is sleeved on the hanging rod (81).
2. The automatic load-removing intelligent thermal extension testing device according to claim 1 is characterized in that: The sample clamp (4) comprises a reset member (50) for keeping the sample clamp (4) in a normally closed state, a clamp fixing plate (48) mounted on the upper part of the sample holder (1), a left clamp arm (43) and a right clamp arm (44) whose upper ends are rotatably connected to the clamp fixing plate (48), and a connecting rod mechanism for driving the left clamp arm (43) and the right clamp arm (44) to open and close; a left clamp block (41) is fixed at the lower end of the left clamp arm (43), a right clamp block (42) is fixed at the lower end of the right clamp arm (44), the left clamp block (41) and the right clamp block (42) form a jaw, and the left clamp block (41) and the right clamp block (42) are tightly attached to clamp the dumbbell sample (100) when the left clamp arm (43) and the right clamp arm (44) are closed; and a movable rod (47) is vertically arranged on the connecting rod mechanism, and the upper end of the movable rod (47) is the highest end of the sample clamp (4).
3. The automatic load-removing intelligent thermal extension testing device according to claim 2 is characterized in that: The connecting rod mechanism comprises a middle connecting frame (45) horizontally arranged between a left clamp arm (43) and a right clamp arm (44), and a connecting plate (46) rotatably connected to the left and right ends of the middle connecting frame (45), the other end of the connecting plate (46) being tilted downward and rotatably connected to the middle and lower part of the left clamp arm (43) or the right clamp arm (44); the lower end of the movable rod (47) is fixed to the center of the middle connecting frame (45).
4. The automatic load-removing intelligent thermal extension testing device according to claim 2 is characterized in that: The top of the sample rack (1) is provided with a plurality of openings, wherein a slide bar block (49) is provided in the opening, and the slide bar block (49) is fixed on the clamp fixing plate (48); a slide bar hole is provided at the center of the slide bar block (49), and the movable rod (47) slides through the slide bar hole.
5. The automatic load-removing intelligent thermal extension testing device according to claim 2, characterized in that: A washer (52) is fixed to the lower side of the clamp fixing plate (48), and the movable rod (47) passes through the washer (52).
6. The automatic load-removing intelligent thermal extension testing device according to claim 2, characterized in that: A rod head (51) is fixed to the upper end of the movable rod (47), and the size of the rod head (51) is larger than the diameter of the movable rod (47).
7. The automatic load-removing intelligent thermal extension testing device according to claim 2, characterized in that: The reset member (50) is a compression spring, and the compression spring is passed through the upper part of the movable rod (47).
8. The automatic load-removing intelligent thermal extension testing device according to claim 2, characterized in that: The left clamp arm (43) and the right clamp arm (44) are arch-shaped, and the cross-sections of the left clamp block (41) and the right clamp block (42) are rectangular or concave-shaped.
9. The automatic load-removing intelligent thermal extension testing device according to claim 1, characterized in that: The unloading device (2) further comprises a bracket (21) mounted on the top of the box body, a motor (22) mounted on the top of the bracket (21), a lead screw and a guide rail vertically mounted in the bracket (21), a slider mounted in cooperation with the lead screw and the guide rail, and a rod fixing plate (23) fixed to the slider, wherein the upper end of the holding rod (24) passes through the box body and is fixed to the rod fixing plate (23).
10. The automatic load-removing intelligent thermal extension testing device according to claim 1, characterized in that: The outer cover of the load-removing device (2) is provided with a protective cover (3).