Cable end socket cap testing device

Abstract

The utility model provides a cable end socket cap testing device, and relates to the field of cable production. The device comprises a test head and a shell, a plurality of steps are arranged on the test head, the outer diameters of the steps are gradually reduced from top to bottom, an opening is formed in the top of the shell, the test head penetrates into the inner side of the shell through the opening, a to-be-tested end socket cap is arranged on the steps in a sleeving mode, a one-way air nozzle is installed at the end of the end socket cap, and the one-way air nozzle is connected with the shell. A water body is arranged in the shell, and the end socket cap and the one-way air tap are immersed in the water body; the inner side of the test head is provided with a gas transmission channel, one end of the gas transmission channel is communicated with a gas source, the other end of the gas transmission channel is communicated with the inner side of the end socket cap, and the gas source is used for transmitting gas to the end socket cap. The end socket cap detection device has the effect of quickly detecting the end socket cap.

Description

Technical Field

[0001] The present application relates to the field of cable production, and in particular to a cable end cap testing device. Background Art

[0002] After the cable is produced and tested, end caps will be installed on both ends of the cable. The sealing effect of the end caps on the cable ends prevents water vapor from entering the interior of the cable, that is, the inner side of the cable sheath, during transportation and storage.

[0003] At present, the end cap is generally made of heat-shrinkable material, which can reliably seal the end of the cable after heating, and has the characteristics of simple operation and good sealing effect. However, the insulation layer of the cable inside the sheath will release methane and other gases for a long time due to the decomposition of the cross-linking agent. At this time, under the sealing effect of the end cap, the gas cannot be discharged to the outside, and as the gas continues to be discharged, the gas pressure in the sheath will continue to increase, causing the sheath to bulge.

[0004] In view of the above-mentioned actual usage, the inventor arranged a one-way air nozzle on the head cap, so that the gas in the sheath can be discharged outwardly through the one-way air nozzle, while the external water vapor cannot enter the inner side of the sheath through the one-way air nozzle. However, due to the lack of testing equipment for such head caps, it is impossible to determine whether the performance of the head cap meets the standards. There is still the problem of water vapor entering the sheath or the sheath bulging during use. Utility Model Content

[0005] In order to improve the problem of being unable to perform quality inspection on the cable end cap, the present application provides a cable end cap testing device.

[0006] The present application provides a cable cap testing device, which adopts the following technical solution:

[0007] A cable end cap testing device comprises a test head and a shell, wherein the test head is provided with a plurality of steps, the outer diameters of the plurality of steps gradually decrease from top to bottom, an opening is provided at the top of the shell, the test head is inserted into the inner side of the shell through the opening, the end cap to be tested is sleeved on the steps, a one-way gas nozzle is provided at the end of the end cap, water is contained in the shell, the end cap and the one-way gas nozzle are immersed in the water; a gas transmission channel is provided on the inner side of the test head, one end of the gas transmission channel is connected to a gas source, and the other end of the gas transmission channel is connected to the inner side of the end cap, and the gas source is used to transmit gas to the end cap.

[0008] By adopting the above technical solution, the head cap to be tested is placed on the corresponding step and fixed, and then the gas source transports gas to the head cap through the gas transmission channel. At this time, if bubbles are generated in the water body and the bubbles are only generated at the one-way gas nozzle, it means that the head cap test is qualified. If bubbles are generated at the outer wall of the head cap, it means that the head cap is damaged and the test fails.

[0009] Optionally, the step located at the top is clamped on the top of the shell.

[0010] By adopting the above technical solution, after the head cap is installed, the test head can be directly placed into the shell. With the clamping action of the step at the top, the test head can be mounted on the shell and the one-way air nozzle can be kept suspended in the air, ensuring that the water body can reliably submerge the head cap and the one-way air nozzle, thereby improving the accuracy of the test results.

[0011] Optionally, hot melt adhesive is provided on the inner side of the head cap, and the hot melt adhesive is used to bond the head cap and the step. The inner diameter of the head cap is smaller than the outer diameter of the corresponding step.

[0012] By adopting the above technical solution, since the outer diameter of the end cap is smaller than the outer diameter of the corresponding step, the end cap can have an interference fit with the step, and can be more tightly fixed on the step after heat shrinkage. When the end cap is heated by a hot air gun, the hot melt adhesive inside the end cap will also melt, thereby further improving the fixing effect of the end cap on the step, preventing gas from leaking from the gap between the end cap and the test head, and thus ensuring the accuracy of the test results.

[0013] Optionally, a quick connector is provided on the top of the test head, an air pipe is provided on the outside of the test head, one end of the air pipe is plugged into the quick connector, and the other end of the air pipe is connected to the air source.

[0014] By adopting the above technical solution, the gas transmission channel is connected to the gas pipe through the quick connector, which improves the reliability of the gas pipe installation and ensures that the gas generated by the gas source can quickly enter the gas transmission channel.

[0015] Optionally, the gas source includes an air pump, a pressure reducing valve, a pressure gauge and a first valve connected in sequence. The gas generated by the air pump is transported to the trachea after being reduced in pressure by the pressure reducing valve. The pressure gauge is used to detect the pressure of the gas after being reduced in pressure by the pressure reducing valve. The first valve is used to control the delivery or cutting off of the gas.

[0016] By adopting the above technical solution, the pressure of the gas input into the end cap can be controlled, thereby simulating the release of gases such as methane in the cable, making the test process more reasonable and preventing the gas pressure from being too high and causing damage to the end cap.

[0017] Optionally, a second valve is further provided between the first valve and the trachea, one end of the second valve is connected to the trachea, and the other end is connected to the outside, and the opening and closing state of the first valve is opposite to the opening and closing state of the second valve.

[0018] By adopting the above technical scheme, when the first valve is in the open state and the second valve is in the closed state, the gas generated by the air pump can enter the air pipe and be discharged through the one-way air nozzle, so as to carry out the exhaust performance test; when the first valve is in the closed state and the second valve is in the open state, the gas generated by the air pump cannot enter the air pipe, and the head cap can be connected with the outside world through the second valve. After standing for a period of time, take out the head cap, wipe off the water on the surface of the head cap, and then cut open the head cap. If there is no water vapor on the inside of the head cap, the water vapor test is passed.

[0019] Optionally, an upper anchor rod is provided at the top of the test head, a lower anchor rod is provided at the bottom of the test head, and a cutting rope is provided on the outside of the test head, one end of the cutting rope is wound around the upper anchor rod, and the other end of the cutting rope is wound around the lower anchor rod; a groove is provided on the outer wall of the test head, the upper end of the groove is connected with the top of the test head, and the lower end of the groove extends downward along the outer walls of several of the steps and is connected with the bottom of the test head, and the cutting rope is buried in the groove.

[0020] By adopting the above technical solution, when the head cap is put on the step, the cutting rope is buried in the groove, which plays a role in closing the groove, and does not affect the fixation and sealing of the head cap on the step. Then, when the head cap needs to be cut, the cutting rope is taken out from the upper anchor rod and pulled in the direction away from the test head, so that the cutting rope can be moved out of the groove. In this process, the cutting effect on the head cap is completed.

[0021] Optionally, the outer diameter of the cutting rope is the same as the depth of the groove, and an overflow hole is provided on the outer wall of the shell, and the overflow hole is located above the head cap.

[0022] By adopting the above technical solution, when the hot melt adhesive melts, it can completely block the groove on the corresponding step to prevent the gas generated by the air pump from leaking from the groove, thereby improving the accuracy of the test results; when the test head is placed in the shell, water needs to overflow from the overflow hole, so that it can be directly determined that the head cap has been completely immersed in the water body; when the test starts, it can also be clearly seen through the overflow hole whether bubbles are generated, thereby assisting in judging the test results.

[0023] In summary, this application has the following beneficial effects:

[0024] 1. Fix the end cap on the step of the test head by heat shrinking, and deliver gas to the end cap through the gas source after opening the first valve and closing the second valve. Then, judge whether the exhaust performance of the end cap is qualified by whether all the gas is discharged outward through the one-way gas nozzle. The end cap can be tested quickly and accurately.

[0025] 2. After opening the second valve and closing the first valve, the outside world and the head cap are connected. At this time, the air pressure inside the head cap is consistent with the outside world. After standing for a period of time, cut open the head cap and observe whether there is water vapor in the head cap to determine whether the water vapor-proof performance of the head cap is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic stereogram of the present application;

[0027] Figure 2 It is the reference diagram of the explosion state of the test head and the head cap;

[0028] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0029] Figure 4 It is a cross-sectional view of the internal structure of the shell and the test head;

[0030] In the figure: 1. test head; 11. step; 12. gas transmission channel; 13. quick connector; 14. upper anchor rod; 15. lower anchor rod; 16. groove; 2. shell; 20. overflow hole; 3. end cap; 30. one-way air nozzle; 4. air source; 41. air pipe; 42. air pump; 43. pressure reducing valve; 44. pressure gauge; 45. first valve; 46. second valve; 47. first three-way joint; 48. second three-way joint; 5. cutting rope. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] Figure 1 is a schematic three-dimensional diagram of the present application, Figure 2 This is a reference diagram of the explosion state of the test head and the head cap. Figure 1 and Figure 2A cable end cap test device includes a shell 2, a test head 1 and an air source 4. An overflow hole 20 is provided on the upper part of the outer wall of the shell 2. Before testing, water is injected into the shell 2 until water overflows from the overflow hole 20. An opening is provided on the top of the shell 2, and the test head 1 is passed through the opening to the inner side of the shell 2. A plurality of steps 11 are provided on the outer wall of the test head 1. The outer diameters of the plurality of steps 11 gradually decrease from top to bottom, and the outer diameter of the uppermost step 11 is larger than the inner diameter of the opening. In this way, the test head 1 can be mounted on the shell 2, and the lower part of the test head 1 can be in a suspended state.

[0033] See also Figure 2 , the end cap 3 to be tested is sleeved on a corresponding step 11 (cables of different sizes correspond to end caps 3 of different sizes, and end caps 3 of different sizes are installed on steps 11 of different outer diameters). The outer diameter of the corresponding step 11 can be 10mm~20mm smaller than the inner diameter of the end cap 3, so that the end cap 3 can be reliably sleeved on the step 11 and form an interference fit with the step 11. Furthermore, hot melt adhesive is provided on the inner side of the end cap 3. After the end cap 3 is sleeved on the step 11, a hot air gun is needed to be used to heat the part of the end cap 3 in contact with the step 11, so that the part can shrink and be reliably fixed on the step 11. At the same time, during the heating process, the hot melt adhesive will also melt, thereby improving the air tightness between the end cap 3 and the step 11.

[0034] Figure 3 yes Figure 2 The enlarged structural diagram at A in the middle, Figure 4 This is a cross-sectional view of the internal structure of the shell and test head. Figure 3 and Figure 4 A gas delivery channel 12 is provided on the inner side of the test head 1. The gas delivery channel 12 extends along the axial direction of the test head 1 and penetrates the test head 1. A quick connector 13 is provided on the top of the test head 1. An air pipe 41 is inserted into the quick connector 13. The quick connector 13 is connected to one end of the gas delivery channel 12. The internal space of the end cap 3 is connected to the other end of the gas delivery channel 12. The gas source 4 includes an air pump 42, a pressure reducing valve 43, a pressure gauge 44, a first valve 45, and a second valve 46. The first valve 45 and the pressure reducing valve 43 are connected by a first three-way connector 47. The pressure gauge 44 is arranged on a branch of the first three-way connector 47. The first valve 45 and the air pipe 41 are connected by a second three-way connector 48. The second valve 46 is arranged on a branch of the second three-way connector 48.

[0035] The opening and closing states of the first valve 45 and the second valve 46 are opposite, so that when the first valve 45 is in the open state and the second valve 46 is in the closed state, the gas generated by the air pump 42 can pass through the pressure reducing valve 43, the first three-way joint 47, the first valve 45, the second three-way joint 48, the air pipe 41, the quick connector 13 and the gas transmission channel 12 in sequence and enter the inner side of the end cap 3. When the first valve 45 is in the closed state and the second valve 46 is in the open state, the gas generated by the air pump 42 cannot enter the inner side of the end cap 3, and at this time, the internal space of the end cap 3 is in a state of communication with the outside through the second valve 46.

[0036] A one-way air nozzle 30 is provided at the bottom of the end cap 3, and the gas in the end cap 3 can be discharged outward through the one-way air nozzle 30, while the external gas cannot be discharged outward through the one-way air nozzle 30. When testing the exhaust performance of the end cap 3, the end cap 3 and the one-way air nozzle 30 are immersed in the water body of the shell 2, and then the second valve 46 is closed and the first valve 45 is opened. At this time, the gas generated by the air pump 42 will enter the end cap 3 after the pressure reduction effect of the pressure reducing valve 43. At this time, if a large number of bubbles are generated at the one-way air nozzle 30 and no bubbles are generated in other parts of the end cap 3, it means that the exhaust performance of the end cap 3 is qualified. The end cap 3 with qualified exhaust performance can reliably discharge the methane and other gases released in the cable sheath due to the decomposition of the cross-linking agent when in use, and prevent the cable sheath from bulging.

[0037] With the cooperation of the pressure gauge 44 and the pressure reducing valve 43, the pressure of the gas delivered to the inside of the head cap 3 can be controlled to prevent the head cap 3 from bursting due to excessive gas pressure. It can also simulate the actual usage scenario, making the test results more accurate.

[0038] When testing the water vapor resistance of the end cap 3, close the first valve 45 and open the second valve 46, so that the air pump 42 will not deliver gas to the end cap 3, and the end cap 3 will be in a state of communication with the outside world. After the end cap 3 is placed in the water body for a period of time, take the test head 1 out of the shell 2, wipe off the water stains on the surface of the end cap 3, and then cut the end cap 3. By observing whether there are water droplets on the inner side of the end cap 3, it is determined whether water vapor has entered the inner side of the end cap 3. If not, it means that the water vapor resistance of the end cap 3 is qualified.

[0039] A groove 16 is provided on the outer wall of the test head 1. The groove 16 extends along the outer wall of the plurality of steps 11. One end of the groove 16 is connected to the top of the test head 1, and the other end of the groove 16 is connected to the bottom of the test head 1. In this way, the grooves 16 are also arranged in a step shape. An upper anchor rod 14 is provided on the top of the test head 1, and a lower anchor rod 15 is provided on the bottom of the test head 1. A cutting rope 5 is provided in the groove 16. One end of the cutting rope 5 is wound around the upper anchor rod 14, and the other end of the cutting rope 5 is wound around the lower anchor rod 15. Before testing the head cap 3, the cutting rope 5 is pressed into the groove 16, and the outer diameter of the cutting rope 5 is the same as the depth of the groove 16, which enables the cutting rope 5 to cover the groove 16. Furthermore, when the hot melt adhesive on the inner wall of the head cap 3 melts, the hot melt adhesive with a certain fluidity will enter the groove 16 in contact with the head cap 3, thereby ensuring that the groove 16 can be completely closed, and the gas in the head cap 3 will not be discharged outward through the gap between the head cap 3 and the groove 16, thereby effectively improving the accuracy of the test results.

[0040] See also Figure 2 and Figure 3 After the test is completed and the end cap 3 needs to be cut, the cutting rope 5 is untied from the upper anchor rod 14 and pulled in a direction away from the test head 1, so that the cutting rope 5 can be moved out of the groove 16, and finally the two ends of the cutting rope 5 are changed from being distributed in the vertical direction to being distributed in the horizontal direction. In this process, the cutting rope 5 will cut the end cap 3, which is convenient for quickly judging whether there are water droplets on the inside of the end cap 3, thereby improving the efficiency of the water vapor resistance performance test. Furthermore, after the cutting rope 5 cuts the end cap 3, the solidified hot melt adhesive will also be cut off, which is convenient for removing the hot melt adhesive and facilitating the next set of tests.

[0041] This application is a destructive test, which is used to perform random inspections on the head caps 3 in the same batch. It can simulate actual usage conditions to quickly test the exhaust performance and water vapor release performance of the head caps 3. The operation is convenient and the test results are accurate.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cable cap testing device, characterized in that: The invention comprises a test head (1) and a shell (2), wherein the test head (1) is provided with a plurality of steps (11), the outer diameters of the plurality of steps (11) gradually decrease from top to bottom, the top of the shell (2) is provided with an opening, the test head (1) is inserted into the inner side of the shell (2) through the opening, a head cap (3) to be tested is sleeved on the step (11), a one-way air nozzle (30) is installed at the end of the head cap (3), a water body is filled in the shell (2), and the head cap (3) and the one-way air nozzle (30) are immersed in the water body; A gas delivery channel (12) is provided on the inner side of the test head (1), one end of the gas delivery channel (12) is connected to a gas source (4), and the other end of the gas delivery channel (12) is connected to the inner side of the end cap (3), and the gas source (4) is used to deliver gas to the end cap (3).

2. A cable end cap testing device according to claim 1, characterized in that: The step (11) located at the top is clamped on the top of the shell (2).

3. A cable end cap testing device according to claim 1, characterized in that: The inner side of the end cap (3) is provided with hot melt adhesive, and the hot melt adhesive is used to bond the end cap (3) and the step (11). The inner diameter of the end cap (3) is smaller than the outer diameter of the corresponding step (11).

4. A cable end cap testing device according to claim 3, characterized in that: A quick connector (13) is provided at the top of the test head (1), and an air pipe (41) is provided on the outside of the test head (1). One end of the air pipe (41) is plugged into the quick connector (13), and the other end of the air pipe (41) is connected to the air source (4).

5. A cable end cap testing device according to claim 4, characterized in that: The gas source (4) comprises an air pump (42), a pressure reducing valve (43), a barometer (44) and a first valve (45) which are connected in sequence. The gas generated by the air pump (42) is decompressed by the pressure reducing valve (43) and then transported to the air pipe (41). The barometer (44) is used to detect the pressure of the gas after the pressure is reduced by the pressure reducing valve (43). The first valve (45) is used to control the transport or cut-off of the gas.

6. A cable end cap testing device according to claim 5, characterized in that: A second valve (46) is further provided between the first valve (45) and the air pipe (41); one end of the second valve (46) is connected to the air pipe (41) and the other end is connected to the outside; the opening and closing state of the first valve (45) is opposite to the opening and closing state of the second valve (46).

7. A cable end cap testing device according to claim 5, characterized in that: An upper anchor rod (14) is provided at the top of the test head (1), a lower anchor rod (15) is provided at the bottom of the test head (1), a cutting rope (5) is provided on the outside of the test head (1), one end of the cutting rope (5) is wound around the upper anchor rod (14), and the other end of the cutting rope (5) is wound around the lower anchor rod (15); A groove (16) is provided on the outer wall of the test head (1), the upper end of the groove (16) is connected to the top of the test head (1), the lower end of the groove (16) extends downward along the outer walls of the plurality of steps (11) and is connected to the bottom of the test head (1), and the cutting rope (5) is buried in the groove (16).

8. A cable end cap testing device according to claim 7, characterized in that: The outer diameter of the cutting rope (5) is the same as the depth of the groove (16); an overflow hole (20) is provided on the outer wall of the shell (2); and the overflow hole (20) is located above the end cap (3).

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