Test tool used for heating wire finished product
By designing a test tool including a megohmmeter, a stent, an insulating plate and a conductive column, it automatically presses the end of the finished heater, and solves the problems of low operating efficiency and fatigue in the finished heater product test, achieving efficient and accurate testing.
Patent Information
- Application Number
- CN202521438816.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2035-07-10
AI Technical Summary
In the insulation resistance test of the heater wire, the operating efficiency is low and the operator's fatigue increases, making it difficult to maintain the relative position of the meter pen, the core wire and the insulating skin.
A test tool was designed, including a megohmmeter, a stent, an insulating plate and a conductive column. The conductive column and a spring structure were used to automatically press the end of the finished product, and the insulating plate and support rod were used to limit the placement status of the heating wire to simplify the operation process.
Improves testing efficiency, reduces operator fatigue, and ensures the accuracy of contact points and test accuracy.
Smart Images
Figure CN223217581U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a testing tool for a finished heating wire product, belonging to the field of tooling. Background Art
[0002] Testing finished heating wires is a key step in ensuring their safety, performance stability, and functional reliability. Insulation resistance testing is one of the test items for finished heating wires. A megohmmeter is one of the commonly used tools for testing the insulation resistance of finished heating wires. The megohmmeter measures the resistance between the core wire and the insulation layer of the heating wire. The resistance value should be ≥100MΩ (at room temperature). During the test, the tips of the two test leads need to be in contact with the core wire and the insulation respectively. At this time, the tester needs to use a pressure-holding method to keep the relative positions of the two test leads, the core wire, and the insulation unchanged. For thinner finished heating wires, more energy is required to maintain the relative positions of the test leads, the core wire, and the insulation. During a large number of tests, operating efficiency is reduced and operator fatigue is increased. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a testing tool for finished heating wires to solve the problems raised in the above-mentioned background technology. The present invention improves operating efficiency and helps reduce operator fatigue.
[0004] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical solutions: a testing tool for a finished heating wire, comprising a megohmmeter, two test leads connected to the megohmmeter by a cable, a support box plugged into the megohmmeter is provided on the lower side of the megohmmeter, and insulating plates for holding the finished heating wire are installed on two parallel side surfaces of the support box, and vertically arranged conductive posts for pressing the end of the finished heating wire are provided on the side of the upper surface of the two insulating plates close to the support box, the upper surface of the conductive posts is recessed downward to form a plug-in slot that matches the pen tip of the test lead, a support ear is installed on the outer surface of the conductive post close to the support box, a guide hole is opened on the upper surface of the support ear, a guide rod is inserted in the guide hole, the lower end of the guide rod is connected and fixed to the insulating plate, and a top plate is installed on the upper end of the guide rod, and a spring in a compressed state is provided between the top plate and the support ear, and the spring is sleeved on the guide rod.
[0005] Furthermore, the cross section of the guide rod is rectangular, and the cross section of the guide hole is rectangular.
[0006] Furthermore, the lower surface of the conductive column is recessed upward to form a semicircular groove for storing the finished heating wire, and the semicircular groove is arranged along the length direction of the insulating plate.
[0007] Furthermore, two supports are installed on the lower surfaces of the two insulating plates, the supports are L-shaped structures, and fixing holes are opened on the upper surfaces of the horizontal parts of the supports.
[0008] Furthermore, an L-shaped rod is installed on the outer surface of the upper end of the conductive column, a gripping handle is installed on the upper end of the L-shaped rod, and the outer surface of the gripping handle is wrapped with a rubber sleeve.
[0009] Furthermore, a connecting plate is installed between the two insulating plates. The connecting plate is a component supported by an insulating material. The connecting plate is arranged in an area between the insulating plates away from the supporting box.
[0010] Furthermore, a limiting column is installed in the middle of the upper surface of the connecting plate, and a plurality of supporting rods for arranging the finished heating wire in an "S" shape are evenly installed on one side of the upper surface of the insulating plate close to the connecting plate.
[0011] Beneficial effects of the utility model:
[0012] 1. Pull the conductive column upward to create a gap between the conductive column and the insulating plate, then place the two ends of the finished heating wire under the two conductive columns respectively, and then lower the conductive column. Under the action of the spring's rebound force, the conductive column moves downward to press the end of the finished heating wire. The two conductive columns are in contact with the core wire and insulation skin of the finished heating wire respectively. The contact is completed after the test pen is inserted into the socket. The time consumption of a single test is shortened, the test efficiency is improved, the operator does not need to continue manual pressure, reduce energy input, and reduce work fatigue.
[0013] 2. Fold the longer heating wire finished product in half about the limiting column, and then make the heating wire finished product alternately bypass the multiple support rods on the insulating board, so that the heating wire finished product is arranged in an "S" shape. This is conducive to limiting the placement of the heating wire finished product and preventing the heating wire finished product from having multiple contact points. It is conducive to improving the accuracy of the resistance insulation value test of the heating wire finished product and is also conducive to the orderly placement of the heating wire. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:
[0015] Figure 1 This is a schematic structural diagram of a test fixture for a finished heating wire according to the present invention;
[0016] Figure 2 This is a schematic diagram of the assembly of an insulating plate, a conductive column, and a support box in a test tool for a finished heating wire according to the present invention;
[0017] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0018] Figure 4 This is a schematic diagram of the assembly of the lugs and conductive posts in a test fixture for a finished heating wire according to the present invention;
[0019] In the figure: 1-megohmmeter, 2-cable, 3-conductive column, 4-grip handle, 5-test lead, 6-insulating plate, 7-support, 8-fixing hole, 9-support rod, 10-finished heating wire, 11-connecting plate, 12-limiting column, 13-support box, 14-plug-in slot, 15-guide rod, 16-support ear, 17-spring, 18-top plate, 19-guide hole, 20-semicircular groove. DETAILED DESCRIPTION
[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.
[0021] See also Figure 1 and Figure 2 The utility model provides a technical solution: a testing tool for a finished heating wire, comprising a megohmmeter 1, two test leads 5 connected to the megohmmeter 1 via a cable 2, a holder 13 plugged into the megohmmeter 1 is provided on the lower side of the megohmmeter 1, and the megohmmeter 1 is placed in the holder 13 to limit the position of the megohmmeter 1.
[0022] See Figure 1 and Figure 2 Insulating plates 6 for supporting the finished heating wire 10 are installed on the two parallel sides of the support box 13. Two supports 7 are installed on the lower surface of the two insulating plates 6. The supports 7 are L-shaped structures. Fixing holes 8 are opened on the upper surface of the horizontal part of the supports 7. The fixing holes 8 are used to install the supports 7 at the desired position to complete the restriction of the position of the insulating plates 6, that is, the position of the support box 13 is restricted.
[0023] See Figures 1-4, the upper surface of the two insulating plates 6 is provided with a vertically arranged conductive column 3 for pressing the end of the heating wire finished product 10 on one side near the bracket 13. The upper surface of the conductive column 3 is recessed downward to form a plug-in slot 14 that matches the pen tip of the test pen 5. The outer surface of the conductive column 3 is provided with a lug 16 on the side near the bracket 13. The upper surface of the lug 16 is provided with a guide hole 19 with a rectangular cross section. A guide rod 15 with a rectangular cross section is inserted into the guide hole 19. The guide rod 15 cooperates with the guide hole 19 to limit the movement trajectory of the conductive column 3. A top plate 18 is installed on the upper end of the guide rod 15. A compression member is provided between the top plate 18 and the lug 16. The spring 17 is in a state, and the spring 17 is sleeved on the guide rod 15. The conductive column 3 is pulled upward to create a gap between the conductive column 3 and the insulating plate 6. Then the two ends of the heating wire product 10 are placed on the lower side of the two conductive columns 3 respectively, and then the conductive columns 3 are lowered. Under the action of the rebound force of the spring 17, the conductive columns 3 move downward to press the ends of the heating wire product 10. The two conductive columns 3 are respectively in contact with the core wire and the insulating skin in the heating wire product 10. The contact can be completed after the test lead 5 is inserted into the plug slot 14. The time consumption of a single test is shortened, the test efficiency is improved, the operator does not need to continue manual pressure, reduce energy input, and reduce work fatigue.
[0024] See Figure 3 and Figure 4 The lower surface of the conductive column 3 is recessed upward to form a semicircular groove 20 for storing the finished heating wire 10. The semicircular groove 20 is arranged along the length direction of the insulating plate 6. An L-shaped rod is installed on the outer surface of the upper end of the conductive column 3, and a gripping handle 4 is installed on the upper end of the L-shaped rod. The outer surface of the gripping handle 4 is wrapped with a rubber sleeve. The structure formed by the L-shaped rod and the gripping handle 4 works together to provide a gripping carrier for lifting the conductive column 3. The semicircular groove 20 increases the contact range between the conductive column 3 and the core wire and the insulating skin.
[0025] See Figure 1 and Figure 2 A connecting plate 11 is installed between the two insulating plates 6. The connecting plate 11 is a component supported by an insulating material. The connecting plate 11 is arranged in an area between the insulating plates 6 away from the supporting box 13. A limiting column 12 is installed in the middle position of the upper surface of the connecting plate 11. A plurality of support rods 9 for arranging the heating wire finished product 10 in an "S" shape are evenly installed on one side of the upper surface of the insulating plate 6 close to the connecting plate 11. The longer heating wire finished product 10 is folded in half about the limiting column 12, and then the heating wire finished product 10 is alternately passed around the plurality of support rods 9 on the insulating plate 6, so that the heating wire finished product 10 is arranged in an "S" shape, which is conducive to limiting the placement state of the heating wire finished product 10, preventing the heating wire finished product 10 from having multiple contact points, and is conducive to improving the accuracy of the resistance insulation value test of the heating wire finished product 10, and is also conducive to the orderly placement of the heating wires.
[0026] Although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. A test fixture for a finished heating wire, comprising a megohmmeter (1), characterized in that: The megohmmeter (1) is connected to two test leads (5) via a cable (2). A support box (13) plugged into the megohmmeter (1) is provided on the lower side of the megohmmeter (1). Insulation plates (6) for supporting the finished heating wire (10) are installed on two parallel sides of the support box (13). A vertically arranged conductive column (3) for pressing the end of the finished heating wire (10) is provided on one side of the upper surface of the two insulating plates (6) close to the support box (13). The upper surface of the conductive column (3) is concave downward to form a portion corresponding to the tip of the test lead (5). The conductive column (3) is provided with a supporting ear (16) on the side of the outer surface close to the support box (13), and a guide hole (19) is provided on the upper surface of the supporting ear (16). A guide rod (15) is inserted into the guide hole (19), and the lower end of the guide rod (15) is connected and fixed to the insulating plate (6). The upper end of the guide rod (15) is provided with a top plate (18), and a spring (17) in a compressed state is provided between the top plate (18) and the supporting ear (16), and the spring (17) is sleeved on the guide rod (15).
2. The testing tool for finished heating wire products according to claim 1, characterized in that: The cross section of the guide rod (15) is rectangular, and the cross section of the guide hole (19) is rectangular.
3. The testing tool for a finished heating wire according to claim 1, characterized in that: The lower surface of the conductive column (3) is recessed upward to form a semicircular groove (20) for storing the finished heating wire (10), and the semicircular groove (20) is arranged along the length direction of the insulating plate (6).
4. The testing tool for a finished heating wire according to claim 1, characterized in that: Two supports (7) are installed on the lower surfaces of the two insulating plates (6); the supports (7) are L-shaped structures, and fixing holes (8) are provided on the upper surfaces of the horizontal parts of the supports (7).
5. The testing tool for finished heating wire products according to claim 1, characterized in that: An L-shaped rod is mounted on the outer surface of the upper end of the conductive column (3), a gripping handle (4) is mounted on the upper end of the L-shaped rod, and the outer surface of the gripping handle (4) is wrapped with a rubber sleeve.
6. The testing tool for a finished heating wire according to claim 1, characterized in that: A connecting plate (11) is installed between the two insulating plates (6). The connecting plate (11) is a component supported by an insulating material. The connecting plate (11) is arranged in an area between the insulating plates (6) away from the support box (13).
7. The testing tool for a finished heating wire according to claim 6, characterized in that: A limiting column (12) is installed in the middle of the upper surface of the connecting plate (11), and a plurality of support rods (9) for arranging the heating wire product (10) in an "S" shape are evenly installed on one side of the upper surface of the insulating plate (6) close to the connecting plate (11).