A cable sealing process external pressure test device

Abstract

The application relates to a cable sealing process external test device, which comprises a sample, a cable, a test barrel, a first flange, a second flange and a test medium, the two ends of the test barrel are respectively provided with the first flange and the second flange, a through hole is arranged on the first flange, a cavity is arranged on the second flange, the cavity is connected with the atmosphere, one end of the cable is exposed in the air through the through hole on the first flange, the other end of the cable is arranged in the cavity and exposed in the air through the cavity, the sample is wrapped at the entrance of the cavity, one part of the sample is connected with the cable, and the other part of the sample is connected with the outer wall of the cavity; the first flange is provided with a test medium inlet, and the test medium is filled into the test barrel through the inlet. Compared with the prior art, the application has the advantages of real-time observation of test results, high sensitivity, high reliability and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable sealing, in particular to a cable sealing process external pressure test device. BACKGROUND

[0002] The cable sealing layer is the first barrier to protect the insulated core from mechanical, moisture, humidity, chemicals, light and other damage, which can effectively protect the cable and thus realize the effective operation of the power grid. At present, the cable sealing process is constantly improving, and after each process improvement, sealing test is used to verify the effectiveness of the sealing process, so the sealing process test device becomes an important tool for testing the sealing process.

[0003] In the prior art, the conventional external pressure test method in the industry is to process the sample into a sealed cavity, then put the whole into water for pressurization, and then take out the sealed cavity to observe whether there is leakage. This method can only use water for detection, and the detection personnel cannot observe the sample in real time. If there is a small amount of leakage in the sealed cavity, it is extremely likely to be absorbed by the water-blocking layer material in the cable structure, resulting in that the small amount of leakage cannot be judged.

[0004] In addition, under the pressure of the test medium, i.e. water, the test sample will form an axial compression on the sample, which will affect the sealing structure and interfere with the judgment of the sealing performance, and it is impossible to test the test sample when the low structural strength material is used as the sample. SUMMARY

[0005] The purpose of the present application is to overcome the defects of the prior art and provide a cable sealing process external pressure test device which can observe the test results in real time, has high sensitivity and high reliability.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] A cable sealing process external pressure test device, the external pressure test device comprises a sample, a cable, a test barrel, a first flange, a second flange and a test medium; the two ends of the test barrel are respectively provided with the first flange and the second flange; the first flange is provided with a through hole, and the second flange is provided with a cavity which is connected to the atmosphere; one end of the cable is exposed to the air through the through hole of the first flange, and the other end is arranged in the cavity and exposed to the air through the cavity; the sample is wrapped around the entrance of the cavity, one part of the sample is connected with the cable, and the other part is connected with the outer wall of the cavity; the first flange is provided with a test medium inlet, and the test medium is filled into the test barrel through the inlet.

[0008] Preferably, the test medium is compressed air or water.

[0009] Preferably, the cable is fixed with the first sealing member at one end close to the first flange; the first sealing member is arranged in the through hole of the first flange.

[0010] More preferably, the external pressure testing device is provided with the first sealing ring at the joint of the first sealing member and the through hole of the first flange.

[0011] More preferably, the external pressure testing device is sealed by the sealing filling glue at the joint of the first sealing member and the through hole of the first flange.

[0012] More preferably, the cable is fixed with the second sealing member at one end close to the second flange; the second sealing member is arranged in the cavity.

[0013] More preferably, the first sealing member and the second sealing member are welded at the two ends of the cable respectively.

[0014] Preferably, the second flange is a "convex" flange, and the cavity is arranged in the protruding part of the second flange.

[0015] Preferably, the testing barrel is provided with the second sealing ring and the third sealing ring at the joint of the first flange and the second flange respectively.

[0016] Preferably, the testing barrel is connected with the first flange and the second flange by bolts respectively.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] I. Real-time observation of test results: The external pressure testing device in the present application uses a cavity to observe test results, and the test personnel can directly observe whether there are water droplets or air flow in the cavity in real time, so as to judge the sealing effect of the sample.

[0019] II. High detection sensitivity: The external pressure testing device in the present application uses a cavity to observe test results, compared with the traditional test method, the external pressure testing device in the present application can judge a small amount of leakage without disassembly; at the same time, compressed air can be used as a test medium to improve the detection sensitivity.

[0020] III. High reliability: The external pressure testing device in the present application exposes the two ends of the cable to the air, balances the stress of the cable in the axial direction, effectively avoids the interference of the axial force on the sample, and greatly improves the reliability of the test.

[0021] IV. Low limitation: The external pressure testing device in the present application can use water or compressed air as a test medium, and the limitation of the test is lower. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1A structure schematic diagram of the external pressure test device in the embodiment of the present application;

[0023] Figure 2 A structure schematic diagram when the sample leaks in the embodiment of the present application.

[0024] The labels in the figure show:

[0025] 1, sample, 2, cable, 3, test barrel, 4, first flange, 5, second flange, 6, first sealing element, 7, second sealing element, 8, first sealing ring, 9, second sealing ring, 10, third sealing ring, 401, test medium inlet, 501, cavity. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the protection scope of the present application.

[0027] Embodiment 1

[0028] An external pressure test device for cable sealing process, the structure is shown as Figure 1 including a sample 1, a cable 2, a test barrel 3, a first flange 4, a second flange 5, and a test medium.

[0029] The test barrel 3 is respectively provided with the first flange 4 and the second flange 5 at two ends, the first flange 4 is provided with a through hole, and the second flange 5 is provided with a cavity 501, which is connected to the atmosphere. One end of the cable 2 is exposed to the air through the through hole of the first flange 4, and the other end is arranged in the cavity 501 and exposed to the air through the cavity 501. Since both ends of the cable 2 are exposed to the air, they are only subjected to atmospheric pressure in the axial direction, so that force balance can be obtained in the axial direction, and the measurement accuracy problem caused by axial compression of the sample can be effectively avoided.

[0030] The sample 1 is wrapped at the inlet of the cavity 501, and one part of the sample 1 is connected with the cable 2, and the other part is connected with the outer wall of the cavity 501. The sample 1 in the embodiment is a sample manufactured by using the cable sealing process to be detected.

[0031] The first flange 4 is provided with a test medium inlet 401, and the test medium is filled into the test barrel 3 through the inlet.

[0032] The cable 2 is fixedly connected with the first sealing element 6 at one end close to the first flange 4, and the first sealing element 6 is arranged in the through hole of the first flange 4.

[0033] The outer pressure test device is provided with a first sealing ring 8 at the joint of the first sealing member 6 and the through hole of the first flange 4

[0034] The cable 2 is fixedly connected with the second sealing member 7 at one end close to the second flange 5, and the second sealing member 7 is arranged in the cavity 501.

[0035] The first sealing member 6 and the second sealing member 7 are respectively welded at two ends of the cable 2.

[0036] The second flange 5 is a "convex" flange, and the cavity 501 is arranged in the protruding part thereof.

[0037] The test barrel 3 is respectively provided with a second sealing ring 9 and a third sealing ring 10 at the joint of the first flange 4 and the second flange 5.

[0038] The test barrel 3 is connected with the first flange 4 and the second flange 5 by bolts respectively.

[0039] Embodiment 2

[0040] An outer pressure test device for cable sealing process, as shown in Figure 1 the structure comprises a sample 1, a cable 2, a test barrel 3, a first flange 4, a second flange 5 and a test medium.

[0041] The test barrel 3 is respectively provided with the first flange 4 and the second flange 5 at two ends thereof, the first flange 4 is provided with a through hole, the second flange 5 is provided with a cavity 501, the cavity 501 is connected to the atmosphere, one end of the cable 2 is exposed to the air through the through hole of the first flange 4, and the other end is arranged in the cavity 501 and exposed to the air through the cavity 501. Since both ends of the cable 2 are exposed to the air, they are only subjected to atmospheric pressure in the axial direction, so that force balance can be obtained in the axial direction, and the measurement accuracy problem caused by axial compression of the sample can be effectively avoided.

[0042] The sample 1 is wrapped around the entrance of the cavity 501, one part of the sample 1 is connected with the cable 2, and the other part is connected with the outer wall of the cavity 501. The sample 1 in this embodiment is a sample manufactured by using the cable sealing process to be detected.

[0043] The first flange 4 is provided with a test medium inlet 401, and the test medium is filled into the test barrel 3 through the inlet.

[0044] The cable 2 is fixedly connected with the first sealing member 6 at one end close to the first flange 4, and the first sealing member 6 is arranged in the through hole of the first flange 4.

[0045] The outer pressure testing device is provided with a sealing ring at the joint of the first sealing member 6 and the through hole of the first flange 4 for sealing. Since the sealing filling glue has a certain elasticity, even if the cable 2 receives a certain pressure in the axial direction, the cable 2 is slightly slid in the axial direction, and the sample 1 also has a certain elasticity, which can fully withstand this degree of pulling and has little effect on the sample 1.

[0046] The cable 2 is fixed at one end close to the second flange 5 with the second sealing member 7, which is arranged in the cavity 501.

[0047] The first sealing member 6 and the second sealing member 7 are respectively welded at both ends of the cable 2.

[0048] The second flange 5 is a "convex" flange, and the cavity 501 is arranged in the protruding part thereof.

[0049] The test barrel 3 is respectively provided with the second sealing ring 9 and the third sealing ring 10 at the joint of the first flange 4 and the second flange 5.

[0050] The test barrel 3 is connected with the first flange 4 and the second flange 5 by bolts respectively.

[0051] Example 3

[0052] The structure is consistent with that of Example 1 or Example 2, the test medium is water, and the test medium is filled through the test medium inlet 401 arranged on the first flange 4. If the sample 1 leaks, as shown in Figure 2 the cavity 501 will have visible water droplets, so that the experimenter can easily judge whether the sample leaks.

[0053] Example 4

[0054] The structure is consistent with that of Example 1 or Example 2, the test medium is compressed air, and the test medium is filled through the test medium inlet 401 arranged on the first flange 4. If the sample 1 leaks, as shown in Figure 2 the cavity 501 will have air flow that can be felt by the human body, so that the experimenter can easily judge whether the sample leaks.

[0055] Further, or fill water in the cavity 501 of the testing device, there will be air bubbles overflowing in the cavity 501, and the trace leakage can be observed. Also, a device for detecting air flow can be used to detect whether there is air flow in the cavity 501, thereby improving the accuracy of the entire test.

[0056] Further, the test barrel 3 can also be sealed during the test, and a device for detecting air pressure or water pressure can be used to detect whether there is a pressure change in the test barrel 3, thereby improving the accuracy of the entire test.

[0057] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A cable seal process external pressure test apparatus, characterized by, The external pressure test device comprises a sample (1), a cable (2), a test barrel (3), a first flange (4), a second flange (5) and a test medium; the test barrel (3) is provided with the first flange (4) and the second flange (5) at two ends respectively; the first flange (4) is provided with a through hole, and the second flange (5) is provided with a cavity (501) connected to the atmosphere; one end of the cable (2) is exposed in the air through the through hole of the first flange (4), and the other end is arranged in the cavity (501) and exposed in the air through the cavity (501); the sample (1) is wrapped at the entrance of the cavity (501), and one part of the sample (1) is connected with the cable (2), and the other part is connected with the outer wall of the cavity (501); the first flange (4) is provided with a test medium inlet (401), and the test medium is filled into the test barrel (3) through the inlet; The second flange (5) is a "convex" flange, and the cavity (501) is arranged in the protruding part of the second flange (5) for directly observing the leakage of the test medium; The test medium is compressed air or water; When the test medium is water, the test medium is filled through the test medium inlet (401), if the sample (1) leaks, water droplets visible to the naked eye will appear in the cavity (501), so that the experimenter can easily judge whether the sample leaks or not; When the test medium is compressed air, the test medium is filled through the test medium inlet (401), if the sample (1) leaks, the airflow that can be felt by the human body will appear in the cavity (501), so that the experimenter can easily judge whether the sample leaks or not.

2. A cable seal process hydrostatic test apparatus according to claim 1, wherein, The cable (2) is fixedly connected with a first sealing member (6) at one end close to the first flange (4); the first sealing member (6) is arranged in the through hole of the first flange (4).

3. A cable seal process hydrostatic test apparatus according to claim 2, wherein, The external pressure test device is provided with a first sealing ring (8) at the connection between the first sealing member (6) and the through hole of the first flange (4).

4. A cable seal process hydrostatic test apparatus according to claim 2, wherein, The external pressure test device is sealed by the sealing ring at the connection between the first sealing member (6) and the through hole of the first flange (4).

5. A cable seal process hydrostatic test apparatus as defined in claim 2, wherein, The cable (2) is fixedly connected with a second sealing member (7) at one end close to the second flange (5); the second sealing member (7) is arranged in the cavity (501).

6. A process for testing the pressure resistance of a cable seal according to claim 5, characterized in that The first sealing member (6) and the second sealing member (7) are respectively welded at two ends of the cable (2).

7. A cable seal process hydrostatic test apparatus as defined in claim 1, wherein, The test barrel (3) is respectively provided with a second sealing ring (9) and a third sealing ring (10) at the connection between the first flange (4) and the second flange (5).

8. A cable seal process hydrostatic test apparatus as defined in claim 1, wherein, The test barrel (3) is connected with the first flange (4) and the second flange (5) by bolts respectively.

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