Destructive pressure test device for heater cylinder body

Abstract

The utility model discloses a destructive withstand voltage test device for a heater cylinder body, and the device can place a casually inspected heater cylinder body on a clamping and fixing assembly in a test protection box, so that the two conductive clamping and fixing assemblies respectively clamp and fix the two ends of the heater cylinder body. Then an LN wire on the heater cylinder body penetrates through a connecting cavity in a conductive plate of the short-circuit connecting piece, and a conductive bolt is screwed, so that the LN wire of the heater cylinder body is fixedly connected with the conductive plate, and the LN wire (a zero wire and a live wire) of the heater cylinder body is in short circuit; and connecting a conductive plate (namely an LN wire of the heater cylinder body) with a withstand voltage tester by using a connecting wire II, then performing a destructive withstand voltage test on the heater cylinder body by using the withstand voltage tester, and recording limit withstand voltage data, thereby obtaining the limit withstand voltage performance of the heater cylinder body. And the safety of the equipment under the accidental overvoltage condition can be better evaluated.

Description

Technical Field

[0001] This application relates to the technical field of withstand voltage tests, and particularly to a destructive withstand voltage test device for a heater barrel body. Background Art

[0002] Destructive withstand voltage tests are used to evaluate the withstand voltage capabilities of electrical equipment and insulating materials. To understand the performance of equipment under extreme conditions, a voltage exceeding the designed tolerance range of the equipment is usually applied until insulation breakdown occurs. In the plastic processing industry, the heating section of plastic forming equipment usually needs to be heated by heaters. For example, in an injection molding machine, a ring-shaped heater is used to heat the extrusion barrel to melt the plastic pellets inside. The ring-shaped heater of the injection molding machine generally uses heating methods such as electric heating wires, electromagnetic induction coils, and infrared heating, all of which require current to pass through and thus convert electrical energy into heat energy. Therefore, an insulating and heat-conducting material needs to be provided on the heater barrel body to avoid current leakage. However, in the quality inspection of existing ring-shaped heaters after production, a destructive withstand voltage test is usually not performed on the heater barrel body, so the ultimate withstand voltage performance of the heater barrel body cannot be known, and thus the safety of the equipment under accidental overvoltage conditions cannot be evaluated. Summary of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of this application is to provide a destructive withstand voltage test device for a heater barrel body to solve the problems raised in the above background art.

[0004] According to one aspect of this application, a destructive withstand voltage test device for a heater barrel body includes a test protection box, insulating support rods, clamping components, short-circuit connectors, and a withstand voltage tester. The top of the test protection box is an open structure and is hinged with a box cover. Two insulating support rods are symmetrically and fixedly arranged on the inner bottom surface of the test protection box. A clamping component is fixedly arranged on the top of each insulating support rod. The two clamping components are used to respectively clamp and fix both ends of the heater barrel body, and the clamping components are made of conductive materials. A short-circuit connector is fixedly arranged on one side wall of the test protection box. The short-circuit connector is connected to the LN line of the heater barrel body. The short-circuit connector and the clamping components are respectively connected to the withstand voltage tester through connecting wire one and connecting wire two. An experiment recorder is fixedly arranged on the upper part of the inner side wall of the test protection box. The camera of the experiment recorder is oriented towards the heater barrel body, and a protective cover is arranged outside the experiment recorder. The protective cover is fixedly connected to the inner side wall of the test protection box. The experiment recorder is electrically connected to a display. The display is integrally arranged on the withstand voltage tester.

[0005] Preferably, the clamping assembly includes a lower arc-shaped clamping plate, an upper arc-shaped clamping plate, a fastening bolt and a conductive connecting piece. The outer arc surface of the lower arc-shaped clamping plate is fixedly connected to the top end of the insulating support rod. An upper arc-shaped clamping plate is arranged above the lower arc-shaped clamping plate, and the inner arc surface of the upper arc-shaped clamping plate is arranged opposite to the inner arc surface of the lower arc-shaped clamping plate. Both ends of the upper arc-shaped clamping plate and both ends of the lower arc-shaped clamping plate are fixedly connected by fastening bolts. During the withstand voltage test, the end of the heater barrel is arranged between the upper arc-shaped clamping plate and the lower arc-shaped clamping plate. A conductive connecting piece is fixedly arranged at the top of the outer arc surface of the upper arc-shaped clamping plate. One end of the second connecting wire is electrically connected to the conductive connecting piece through an alligator clip head, and the other end of the second connecting wire is electrically connected to the withstand voltage tester through a round head pin.

[0006] Preferably, the lower arc-shaped clamping plate, the upper arc-shaped clamping plate, the fastening bolt and the conductive connecting piece are all made of conductive materials.

[0007] Preferably, the short-circuit connecting piece includes an insulating fixing block, a conductive plate and a conductive bolt. The insulating fixing block is embedded through the side wall of the test protection box. A conductive plate is penetrated through the insulating fixing block. Both ends of the conductive plate are respectively located inside and outside the test protection box. The two sides of the end of the conductive plate located inside the test protection box are bent inward to form a wrapped structure to form a connecting cavity. And a conductive bolt is threadedly penetrated and connected to the conductive plate above the connecting cavity. The LN wire of the heater barrel passes through the connecting cavity, and the LN wire of the heater barrel is fixedly connected to the conductive plate through the conductive bolt. One end of the first connecting wire is electrically connected to the end of the conductive plate located outside the test protection box through an alligator clip head, and the other end of the first connecting wire is electrically connected to the withstand voltage tester through a round head pin.

[0008] Preferably, an opening notch is formed at the side of the top of the test protection box. When the second connecting wire is connected to the clamping assembly, the line segment of the second connecting wire can be placed in the opening notch, and then the box cover can be attached and connected to the test protection box.

[0009] Preferably, the test protection box, the box cover and the protective cover are all made of insulating transparent materials.

[0010] The advantages of this application compared with the prior art are as follows: A destructive voltage withstand test device for the heater barrel of this application can place the sampled heater barrel on the clamping component in the test protection box, so that the two conductive clamping components respectively clamp both ends of the heater barrel. Then, pass the LN wire on the heater barrel through the connection cavity on the conductive plate of the short-circuit connecting piece and tighten the conductive bolt, so that the LN wire of the heater barrel is fixedly connected to the conductive plate, so that the LN wire (neutral wire and live wire) of the heater barrel is short-circuited. Then, use the first connecting wire to connect the clamping component to the voltage withstand tester, and use the second connecting wire to connect the conductive plate (i.e., the LN wire of the heater barrel) to the voltage withstand tester. Then, use the voltage withstand tester to conduct a destructive voltage withstand test on the heater barrel and record the ultimate voltage withstand data, so as to know the ultimate voltage withstand performance of the heater barrel and better evaluate the safety of the equipment under accidental overvoltage conditions. In addition, the test recorder installed on the test protection box can record the changes of the heater barrel during the whole destructive voltage withstand test, so as to facilitate further analysis of its performance later. Brief Description of the Drawings

[0011] Figure 1 is a perspective view of a destructive voltage withstand test device for a heater barrel according to an embodiment of the present application.

[0012] Figure 2 is a perspective view of the test protection box and the clamping component of a destructive voltage withstand test device for a heater barrel according to an embodiment of the present application.

[0013] Figure 3 is a partial sectional perspective view of a destructive voltage withstand test device for a heater barrel according to an embodiment of the present application.

[0014] Figure 4 is Figure 3 a schematic enlarged view of the structure of part A in

[0015] Figure 5 is a side sectional view of a destructive voltage withstand test device for a heater barrel according to an embodiment of the present application.

[0016] Reference Numerals: 1. Test protection box; 2. Insulating support rod; 3. Clamping component; 31. Lower arc-shaped clamping plate; 32. Upper arc-shaped clamping plate; 33. Tightening bolt; 34. Conductive connecting piece; 4. Short-circuit connecting piece; 41. Insulating fixing block; 42. Conductive plate; 421. Connection cavity; 43. Conductive bolt; 5. Voltage withstand tester; 6. Box cover; 7. Heater barrel; 71. LN wire; 8. First connecting wire; 9. Second connecting wire; 10. Test recorder; 11. Protective cover; 12. Display; 13. Opening notch. Detailed Description of the Embodiment

[0017] To make the content of this application easier to be clearly understood, the following will, in conjunction with the accompanying drawings in the embodiments of this application, clearly and completely describe the technical solutions in the embodiments of this application. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. Figure 1

[0018] Such as Figures 1 to 5 ​As shown in the figure, a destructive pressure resistance test device for a heater barrel body includes a test protection box 1, insulating support rods 2, clamping assemblies 3, short-circuit connectors 4, and a pressure resistance tester 5. The top of the test protection box 1 is an open structure and is hinged with a box cover 6. Two insulating support rods 2 are symmetrically and fixedly arranged on the inner bottom surface of the test protection box 1. A clamping assembly 3 is fixedly arranged at the top of each insulating support rod 2. The two clamping assemblies 3 are used to clamp and fix the two ends of the heater barrel body 7 respectively. Specifically, the clamping assembly 3 includes a lower arc-shaped clamping plate 31, an upper arc-shaped clamping plate 32, a fastening bolt 33, and a conductive connection piece 34. The outer arc surface of the lower arc-shaped clamping plate 31 is fixedly connected to the top end of the insulating support rod 2. An upper arc-shaped clamping plate 32 is arranged above the lower arc-shaped clamping plate 31, and the inner arc surface of the upper arc-shaped clamping plate 32 is arranged opposite to the inner arc surface of the lower arc-shaped clamping plate 31. Both ends of the upper arc-shaped clamping plate 32 and both ends of the lower arc-shaped clamping plate 31 are fixedly connected through the fastening bolt 33. A conductive connection piece 34 is fixedly arranged at the top of the outer arc surface of each upper arc-shaped clamping plate 32. In addition, the lower arc-shaped clamping plate 31, the upper arc-shaped clamping plate 32, the fastening bolt 33, and the conductive connection piece 34 are all made of conductive materials, so that the entire clamping assembly 3 can conduct electricity. When installing the heater barrel body 7 during the pressure resistance test, the two ends of the heater barrel body 7 need to be respectively placed on the inner arc surfaces of the two lower arc-shaped clamping plates 31, and then the two upper arc-shaped clamping plates 32 are correspondingly placed at the two ends of the heater barrel body 7. Then, the fastening bolts 33 are respectively passed through the two ends of the upper arc-shaped clamping plate 32 and the lower arc-shaped clamping plate 31 and tightened with nuts, so that the upper arc-shaped clamping plate 32 and the lower arc-shaped clamping plate 31 clamp and fix the heater barrel body 7. One end of the connecting wire two 9 is connected to the conductive connection piece 34 through an alligator clip head, and the other end of the connecting wire two 9 is connected to the pressure resistance tester 5 through a round head pin, so that the insulating part of the heater barrel body 7 can be electrically connected to the pressure resistance tester 5 through the clamping assembly 3 and the connecting wire two 9;A short - circuit connector 4 is fixedly provided on one side wall of the test protection box 1. Specifically, the short - circuit connector 4 includes an insulating fixing block 41, a conductive plate 42, and a conductive bolt 43. The insulating fixing block 41 is embedded through the side wall of the test protection box 1. The conductive plate 42 is provided through the insulating fixing block 41. The two ends of the conductive plate 42 are respectively located inside and outside the test protection box 1. The two sides of the end of the conductive plate 42 located inside the test protection box 1 are bent inward into a wrapped - like structure to form a connection cavity 421. And a conductive bolt 43 is threadedly connected through the conductive plate 42 above the connection cavity 421. The LN wire 71 of the heater barrel 7 passes through the connection cavity 421, and the LN wire 71 of the heater barrel 7 is fixedly connected to the conductive plate 42 through the conductive bolt 43, thereby short - circuiting the LN wire 71 (neutral wire and live wire) of the heater barrel 7. One end of the first connecting wire 8 is connected to the end of the conductive plate 42 located outside the test protection box 1 through an alligator clip head, and the other end of the first connecting wire 8 is connected to the withstand voltage tester 5 through a round - head pin, so that the short - circuited LN wire 71 of the heater barrel 7 can be electrically connected to the withstand voltage tester 5 through the conductive plate 42 and the first connecting wire 8. An experimental recorder 10 is fixedly provided on the upper part of the inner side wall of the test protection box 1. The camera of the experimental recorder 10 is oriented towards the heater barrel 7. And a protective cover 11 is provided outside the experimental recorder 10. The protective cover 11 can protect the safety of the experimental recorder 10 during the destructive withstand voltage test. The protective cover 11 is fixedly connected to the inner side wall of the test protection box 1. The experimental recorder 10 is electrically connected to the display 12. The display 12 is integrally provided on the withstand voltage tester 5, so that the destructive withstand voltage test of the heater barrel 7 recorded by the experimental recorder 10 can be displayed and stored on the display 12 for further analysis of the withstand voltage performance of the heater barrel 7 in the future. In addition, an opening notch 13 is provided at the side of the top of the test protection box 1. When the second connecting wire 9 is connected to the clamping assembly 3, the line segment of the second connecting wire 9 can be placed in the opening notch 13, so that the box cover 6 can be fitted and connected to the test protection box 1. In addition, the test protection box 1, the box cover 6, and the protective cover 11 are all made of insulating transparent materials, so as to observe the changes of the heater barrel 7 during the destructive withstand voltage test.;

[0019] Working principle: Before the test, both ends of the heater barrel 7 are respectively installed on two clamping assemblies 3, and the LN wire 71 of the heater barrel 7 is connected to the connection cavity 421 of the conductive plate 42 to short it. Then, one end of the second connecting wire 9 is connected to the conductive connecting piece 34 on the clamping assembly 3 at one end of the heater barrel 7 through an alligator clip, and the other end of the second connecting wire 9 is connected to the withstand voltage tester 5 through a round head pin, so that the insulated part at one end of the heater barrel 7 can be electrically connected to the withstand voltage tester 5 through the clamping assembly 3 and the second connecting wire 9. Then, one end of the first connecting wire 8 is connected to the end of the conductive plate 42 located outside the test protection box 1 through an alligator clip, and the other end of the first connecting wire 8 is connected to the withstand voltage tester 5 through a round head pin, so that the LN wire 71 after the heater barrel 7 is shorted can be electrically connected to the withstand voltage tester 5 through the conductive plate 42 and the first connecting wire 8; in the destructive withstand voltage test, the withstand voltage tester 5 is a high-voltage tester, and the withstand voltage tester 5 is used to gradually increase the voltage until the insulation of the heater barrel 7 breaks down, and the voltage value at which the breakdown occurs is recorded; then, the alligator clip at one end of the second connecting wire 9 is connected to the conductive connecting piece 34 on the clamping assembly 3 at the other end of the heater barrel 7, and the withstand voltage tester 5 is used again to gradually increase the voltage until the insulation of the heater barrel 7 breaks down, and the voltage value at which the breakdown occurs is recorded, so as to know the ultimate withstand voltage performance of the heater barrel 7 and better evaluate the safety of the equipment under accidental overvoltage conditions; in addition, the test recorder 10 installed on the test protection box 1 can record the changes of the heater barrel 7 during the whole destructive withstand voltage test process for subsequent further analysis of its performance.

[0020] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and are not intended to limit them. Although the embodiments of the present application have been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that without departing from the spirit and scope defined by the claims of the present application, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features.

Claims

1. A destructive withstand voltage test device for a heater barrel, comprising a test protection box (1), an insulating support rod (2), a clamping assembly (3), a short-circuit connector (4) and a withstand voltage tester (5), characterized in that: The top of the test protection box (1) is an open structure and is hingedly provided with a box cover (6). Two insulating support rods (2) are symmetrically fixedly provided on the bottom surface of the interior of the test protection box (1). A clamping assembly (3) is fixedly provided on the top of each insulating support rod (2). The two clamping assemblies (3) are used to clamp and fix the two ends of the heater barrel (7) respectively, and the clamping assemblies (3) are made of conductive material. A short-circuit connector (4) is fixedly provided on one side wall of the test protection box (1). The short-circuit connector (4) is connected to the LN line (71) of the heater barrel (7). The short-circuit connector (4) and The clamping assembly (3) is connected to the withstand voltage tester (5) through a connecting wire 1 (8) and a connecting wire 2 (9), respectively; a test recorder (10) is fixedly provided on the upper part of the inner wall of the test protection box (1); a camera of the test recorder (10) is arranged toward the heater barrel (7); and a protective cover (11) is arranged on the outer side of the test recorder (10); the protective cover (11) is fixedly connected to the inner wall of the test protection box (1); the test recorder (10) is electrically connected to a display (12), and the display (12) is integrated on the withstand voltage tester (5).

2. A destructive pressure test device for a heater barrel according to claim 1, characterized in that: The clamping assembly (3) comprises a lower arc-shaped clamping plate (31), an upper arc-shaped clamping plate (32), a fastening bolt (33) and a conductive connecting plate (34); the outer arc surface of the lower arc-shaped clamping plate (31) is fixedly connected to the top of the insulating support rod (2); an upper arc-shaped clamping plate (32) is arranged above the lower arc-shaped clamping plate (31); the inner arc surface of the upper arc-shaped clamping plate (32) is arranged opposite to the inner arc surface of the lower arc-shaped clamping plate (31); the two ends of the upper arc-shaped clamping plate (32) are connected to the lower arc-shaped clamping plate (31); 1) are fixedly connected at both ends by fastening bolts (33). During the pressure test, the end of the heater barrel (7) is arranged between the upper arc clamping plate (32) and the lower arc clamping plate (31). A conductive connecting piece (34) is fixedly provided on the top of the outer arc surface of the upper arc clamping plate (32). One end of the connecting wire (9) is connected to the conductive connecting piece (34) through an alligator clip, and the other end of the connecting wire (9) is connected to the pressure tester (5) through a round head pin.

3. A destructive pressure test device for a heater barrel according to claim 2, characterized in that: The lower arc-shaped clamping plate (31), the upper arc-shaped clamping plate (32), the fastening bolts (33) and the conductive connecting plate (34) are all made of conductive materials.

4. A destructive pressure test device for a heater barrel according to claim 1, characterized in that: The short-circuit connector (4) comprises an insulating fixing block (41), a conductive plate (42) and a conductive bolt (43); the insulating fixing block (41) is embedded in the side wall of the test protection box (1); the insulating fixing block (41) is provided with a conductive plate (42); the two ends of the conductive plate (42) are respectively located on the inner side and the outer side of the test protection box (1); the two sides of the end of the conductive plate (42) located on the inner side of the test protection box (1) are bent inwardly into a wrapping structure to form a connecting cavity (421), and the conductive plate (42) is located above the connecting cavity (421). A conductive bolt (43) is threadedly passed through the conductive plate (42), the LN wire (71) of the heater barrel (7) passes through the connecting cavity (421), and the LN wire (71) of the heater barrel (7) is fixedly connected to the conductive plate (42) through the conductive bolt (43), one end of the connecting wire (8) is connected to the end of the conductive plate (42) located outside the test protection box (1) through an alligator clip, and the other end of the connecting wire (8) is connected to the voltage withstand tester (5) through a round head pin.

5. A destructive pressure test device for a heater barrel according to claim 1, characterized in that: The top side of the test protection box (1) is provided with an opening notch (13). When the second connecting wire (9) is connected to the clamping assembly (3), the line segment of the second connecting wire (9) can be placed in the opening notch (13), and then the box cover (6) can be closely connected to the test protection box (1).

6. A destructive pressure test device for a heater barrel according to claim 1, characterized in that: The test protection box (1), the box cover (6) and the protection cover (11) are all made of insulating transparent materials.

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