CN113932998B - Device and method for testing sealing performance of cable intermediate connector - Google Patents
Device and method for testing sealing performance of cable intermediate connector Download PDFInfo
- Publication number
- CN113932998B CN113932998B CN202111294618.XA CN202111294618A CN113932998B CN 113932998 B CN113932998 B CN 113932998B CN 202111294618 A CN202111294618 A CN 202111294618A CN 113932998 B CN113932998 B CN 113932998B
- Authority
- CN
- China
- Prior art keywords
- sealing
- air
- cable intermediate
- pressure sensor
- intermediate joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 171
- 238000012360 testing method Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000011056 performance test Methods 0.000 claims abstract description 18
- 230000008859 change Effects 0.000 claims abstract description 13
- 238000000605 extraction Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims description 8
- 238000004146 energy storage Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000003566 sealing material Substances 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The application relates to a device and a method for testing sealing performance of a cable intermediate joint, wherein the device comprises a sealing structure and a testing device, and the sealing structure is provided with a sealing cavity for placing the cable intermediate joint; the test device comprises a control circuit board, a vacuum pump, an electromagnetic air valve and a digital pressure sensor module, wherein the control circuit board is used for controlling the vacuum pump to be inflated or exhausted, the electromagnetic air valve is turned off, the air pressure value detected by the digital pressure sensor module is collected, and the sealing performance test result of the cable intermediate joint is obtained according to the air pressure value analysis. After the vacuum pump is utilized for inflation or air extraction, the air pressure value detected by the digital pressure sensor module can reflect the air pressure change of the sealing cavity, so that the sealing performance of the cable intermediate joint is evaluated, and the testing reliability is high.
Description
Technical Field
The application relates to the technical field of distribution network cable intermediate connectors, in particular to a device and a method for testing sealing performance of a cable intermediate connector.
Background
With the continuous expansion of cities, the requirements for urban appearance are higher and higher, the erection of power lines in cities is gradually changed from the original overhead lines to underground cables, and the use of wires and cables reduces the use of urban spider-web-like wires, and meanwhile, the safety performance is improved. The cables often require two lengths of cable to be connected by way of a cable intermediate head when the cable is laid. The operation quality of the cable middle head is critical, and the key that whether the whole line can safely run can be influenced. Therefore, how to perform reliable sealing performance test on the cable intermediate connector is a problem to be solved.
Disclosure of Invention
In view of the above, it is necessary to provide a cable intermediate joint sealing performance test device and method with high test reliability.
The device comprises a sealing structure and a testing device, wherein the sealing structure is provided with a sealing cavity for placing the cable intermediate connector; the test device comprises a control circuit board, a vacuum pump, an electromagnetic air valve and a digital pressure sensor module, wherein an air inlet of the electromagnetic air valve is connected with the vacuum pump through an air pipe, an air outlet of the electromagnetic air valve is connected with an air inlet of the digital pressure sensor module through an air pipe, an air outlet of the digital pressure sensor module is communicated with the sealing cavity through an air pipe, and the control circuit board is connected with the vacuum pump, the electromagnetic air valve and the digital pressure sensor module through data lines;
And the control circuit board is used for controlling the vacuum pump to perform inflation or air extraction, then switching off the electromagnetic air valve, collecting the air pressure value detected by the digital pressure sensor module, and analyzing according to the air pressure value to obtain a sealing performance test result of the cable intermediate joint.
In one embodiment, the control circuit board controls the vacuum pump to perform inflation or air extraction, the electromagnetic air valve is turned off after the digital pressure sensor module detects that the air pressure reaches the corresponding air pressure threshold, the air pressure detected by the digital pressure sensor module in the air pressure maintaining time is recorded, and the cable intermediate joint sealing performance test result is obtained according to the recorded air pressure change condition in the air pressure maintaining time.
In one embodiment, the sealing structure comprises a structural body and an air nozzle, the structural body is provided with the sealing cavity, the air nozzle is arranged on the structural body and communicated with the sealing cavity, and the air nozzle is connected with the air outlet of the digital pressure sensor module through an air pipe.
In one embodiment, the structural body comprises a first structural body and a second structural body, one side of the first structural body is connected with one side of the second structural body, and sealing teeth are arranged on the other side of the first structural body and the other side of the second structural body.
In one embodiment, the sealing structure further includes a sealing ring, where the first structure body and the second structure body are both in a semi-cylindrical structure, and the sealing ring is disposed at two opposite ends of the first structure body and the second structure body when the first structure body and the second structure body are closed by the sealing teeth; wherein, the sealing washer includes the first sealing part that matches with first structure and second structure, and the second sealing part that matches with the cable.
In one embodiment, the sealing structure further comprises a clamp for clamping after the first and second structures are closed by the sealing teeth.
In one embodiment, the digital pressure sensor module includes a pressure sensor and an ADC interface chip that connects the pressure sensor and the control circuit board.
In one embodiment, the test device further comprises a human interface panel and an energy storage device coupled to the control circuit board.
In one embodiment, the control circuit board comprises a controller, an interface circuit and a charge-discharge management circuit, wherein the controller is connected with the interface circuit and is connected with the energy storage device through the charge-discharge management circuit, and the interface circuit is connected with the vacuum pump, the electromagnetic air valve, the digital pressure sensor module and the man-machine interface panel through data lines.
The cable intermediate joint sealing performance testing method is realized based on the cable intermediate joint sealing performance testing device, and comprises the following steps:
After the vacuum pump is controlled to carry out inflation or air extraction, the electromagnetic air valve is turned off;
and acquiring the air pressure value detected by the digital pressure sensor module, and analyzing according to the air pressure value to obtain a cable intermediate joint sealing performance test result.
According to the cable intermediate joint sealing performance testing device and method, the cable intermediate joint is placed in the sealing cavity in the sealing structure, the control circuit board controls the vacuum pump to be inflated or exhausted, the vacuum pump is turned off, the air pressure value detected by the digital pressure sensor module is collected, and the cable intermediate joint sealing performance testing result is obtained according to the air pressure value analysis. After the vacuum pump is utilized for inflation or air extraction, the air pressure value detected by the digital pressure sensor module can reflect the air pressure change of the sealing cavity, so that the sealing performance of the cable intermediate joint is evaluated, and the testing reliability is high.
Drawings
FIG. 1 is a schematic diagram of a cable intermediate joint sealing performance testing device according to an embodiment;
FIG. 2 is a block diagram of a test device according to an embodiment;
FIG. 3 is a front view of a seal structure in one embodiment;
FIG. 4 is a side view of a seal structure in one embodiment;
FIG. 5 is a side view of a seal ring according to one embodiment;
FIG. 6 is a top view of a seal ring in an embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. In the following embodiments, "connected" is understood to mean "electrically connected", "communicatively connected", and the like, if the connected circuits, modules, units, and the like have electrical or data transferred therebetween.
As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Meanwhile, the term used in the present specification includes any and all combinations of the items listed in association.
In one embodiment, as shown in fig. 1 and 2, a cable intermediate joint sealing performance testing device is provided, including a sealing structure 110 and a testing device 120, where the sealing structure 110 is provided with a sealing cavity 112 for placing a cable intermediate joint 210. The test device 120 comprises a control circuit board 121, a vacuum pump 122, an electromagnetic air valve 123 and a digital pressure sensor module 124, wherein an air inlet of the electromagnetic air valve 123 is connected with the vacuum pump 122 through an air pipe, an air outlet of the electromagnetic air valve 123 is connected with an air inlet of the digital pressure sensor module 124 through an air pipe, an air outlet of the digital pressure sensor module 124 is communicated with the sealing cavity 112 of the sealing structure 110 through an air pipe, and the control circuit board 121 is connected with the vacuum pump 122, the electromagnetic air valve 123 and the digital pressure sensor module 124 through data lines. The control circuit board 121 is used for controlling the vacuum pump 122 to perform inflation or air extraction, then turning off the electromagnetic air valve 123, collecting the air pressure value detected by the digital pressure sensor module 124, and analyzing according to the air pressure value to obtain the sealing performance test result of the cable intermediate connector 210. Wherein the vacuum pump 122 may employ a micro air compression pump.
Specifically, when the cable intermediate connector 210 needs to be tested for sealing performance, a tester first places the cable intermediate connector 210 in the sealing cavity 112 of the sealing structure 110, and the cable 220 extends to the outside of the sealing structure 110, and a sealing ring or other sealing material may be disposed on the sealing structure 110 at the opening position from which the cable 220 extends to prevent air leakage. The electromagnetic air valve 123 is firstly opened by the control circuit board 121, the vacuum pump 122 is controlled to inflate so that the sealing cavity 112 forms positive pressure, the electromagnetic air valve 123 is closed, and the air pressure value detected by the digital pressure sensor module 124 is recorded. Then the control circuit board 121 opens the electromagnetic air valve 123, controls the vacuum pump 122 to pump air to enable the sealing cavity 112 to form negative pressure, closes the electromagnetic air valve 123, and records the air pressure value detected by the digital pressure sensor module 124.
The control circuit board 121 may display or print the air pressure value recorded when the seal cavity 112 is at positive pressure and negative pressure, so that the tester can analyze whether the cable intermediate connector meets the standard according to the detected air pressure value. In addition, the control circuit board 121 may automatically analyze the air pressure change condition in the sealing cavity 112 according to the recorded air pressure value, and determine whether the sealing performance of the cable intermediate connector 210 meets the standard according to the air pressure change condition. For example, if an excessive decrease in the air pressure within the sealed cavity 112 is detected when the sealed cavity 112 forms a positive pressure, it may be considered that the cable middle joint 210 is not sealed up to the standard, and the air within the sealed cavity 112 leaks from the cable middle joint 210 to the cable 220 and is discharged to the outside of the sealing structure 110, thereby causing the decrease in the air pressure detected by the digital pressure sensor module 124; if an excessive increase in the air pressure within the sealed cavity 112 is detected when the sealed cavity 112 is at a negative pressure, it may also be considered that the cable intermediate joint 210 is not sealed, and that the air outside the sealing structure 110 enters the sealed cavity 112 from the cable intermediate joint 210 through the cable 220, resulting in an increase in the air pressure detected by the digital pressure sensor module 124.
Further, in one embodiment, the control circuit board 121 controls the vacuum pump 122 to perform inflation or evacuation, after detecting that the air pressure reaches the corresponding air pressure threshold value through the digital pressure sensor module 124, turns off the electromagnetic air valve 123, records the air pressure detected by the digital pressure sensor module 124 in the air pressure holding time, and obtains the cable intermediate joint sealing performance test result according to the recorded air pressure change condition in the air pressure holding time.
The tester may save parameters such as the air pressure threshold value, the air pressure holding time, and the alarm air pressure value in the control circuit board 121 in advance. It can be understood that the specific values of the air pressure threshold value, the air pressure holding time and the alarm air pressure value are not unique, and can be set according to actual conditions. Specifically, the air pressure threshold includes an inflation air pressure threshold and an air extraction air pressure threshold, the control circuit board 121 controls the vacuum pump 122 to inflate to reach the inflation air pressure threshold, and then turns off the electromagnetic air valve 123, and records the air pressure detected by the digital pressure sensor module 124 in the air pressure holding time. Then, the control circuit board 121 opens the electromagnetic air valve 123, controls the vacuum pump 122 to pump air to reach the pumping air pressure threshold value, and turns off the electromagnetic air valve 123 to record the air pressure detected by the digital pressure sensor module 124 in the air pressure maintaining time. Based on the air pressure values recorded under the positive pressure and the negative pressure, if the control circuit board 121 analyzes that the air pressure variation amount during the air pressure maintaining time is less than or equal to the alarm air pressure value, the sealing performance of the cable intermediate joint 210 can be considered to be qualified. Conversely, if the amount of change in air pressure during the air pressure retention time at positive or negative pressure is greater than the alarm air pressure value, the sealing performance of the cable intermediate joint 210 may be considered to be unacceptable.
The specific structure of the digital pressure sensor module 124 is not exclusive, and in one embodiment, the digital pressure sensor module includes a pressure sensor and an ADC (analog-to-Digital Conversion) interface chip, which connects the pressure sensor and the control circuit board 121. Specifically, the pressure sensor may be a high-precision piezoresistive pressure sensor, the ADC interface chip is connected to the control circuit board 121 through a connection flat cable, the connection cable provides power from the control circuit board 121 to power the digital pressure sensor module 124, and the data cable is a communication cable of the digital pressure sensor module 124 and an interface circuit on the control circuit board 121, and is responsible for data transmission of the digital pressure sensor module 124.
In one embodiment, with continued reference to FIG. 2, the test device 120 further includes a human interface panel 125 and an energy storage device 126 coupled to the control circuit board 121. Specifically, the human-machine interface panel 125 includes a display screen and a driving circuit, and the driving circuit is connected to the display screen and connected to the control circuit board 121 through a flat cable. The display screen may be a touch display screen, and the tester may set parameters, such as an input air pressure threshold, an air pressure holding time, and an alarm air pressure value, through the touch display screen, and store the parameters in the control circuit board 121. After the control circuit board 121 records the air pressure values recorded under the positive pressure and the negative pressure, an air pressure monitoring chart can be generated according to the recorded air pressure values and sent to the touch display screen for display. In addition, the human interface panel 125 may further include buttons connected to the control circuit board 121, and the tester may also perform parameter setting through the buttons.
Further, in one embodiment, the human interface panel 125 may further include an alarm circuit connected to the control circuit board 121, and the alarm circuit may include an alarm lamp, a speaker, and the like. Taking a speaker as an example, when the air pressure variation in the air pressure maintaining time under the positive pressure or the negative pressure is greater than the alarm air pressure value, the control circuit board 121 can also control the speaker to send out an alarm sound so as to remind the testers that the sealing performance of the cable intermediate connector 210 tested at the time is not qualified. Further, the energy storage device 126 may specifically employ a battery for providing power to the control circuit board 121, the man-machine interface panel 125, and the digital pressure sensor module 124.
In one embodiment, the control circuit board 121 includes a controller, an interface circuit, and a charge and discharge management circuit, the controller is connected to the interface circuit, and is connected to the energy storage device 126 through the charge and discharge management circuit, and the interface circuit is connected to the vacuum pump 122, the electromagnetic air valve 123, the digital pressure sensor module 124, and the human interface panel 125 through data lines. Wherein, the controller can specifically adopt MCU (Micro Control Unit ).
It will be appreciated that the specific configuration of the seal 110 is not exclusive, and in one embodiment, as shown in fig. 3 and 4, the seal includes a structural body and an air tap 114, the structural body is provided with a seal cavity, the air tap 114 is provided on the structural body and is in communication with the seal cavity, and the air tap 114 is connected to an air outlet of the digital pressure sensor module 124 through an air pipe. In addition, an air drier can be arranged in the air nozzle 114 to prevent air with excessive humidity from entering the middle of the cable 220 under high pressure due to poor manufacture of the cable middle connector 210.
Specifically, the shape of the structural body is not limited to a cylindrical shape, and may be a rectangular parallelepiped shape or other shapes. In one embodiment, the structural body includes a first structural body 116 and a second structural body 118, one side of the first structural body 116 is connected with one side of the second structural body 118, and the other side of the first structural body 116 and the other side of the second structural body 118 are provided with sealing teeth 119. In this embodiment, the first structure 116 and the second structure 118 are both in a semi-cylindrical structure, and the other side of the first structure 116 and the other side of the second structure 118 are closed by the seal teeth 119 to form a cylindrical seal cavity 112 for placing the cable middle connector 210.
Further, in one embodiment, as shown in fig. 5 and 6, the sealing structure 110 further includes a sealing ring 117, where the first structure 116 and the second structure 118 are both in a semi-cylindrical structure, and the sealing ring 117 is disposed at opposite ends of the first structure 116 and the second structure 118 when the first structure 116 and the second structure 118 are closed by the sealing teeth 119; wherein the sealing ring 117 comprises a first sealing portion 1172 mated with the first structure 116 and the second structure 118, and a second sealing portion 1174 mated with the cable 220. The material of the seal ring 117 is not unique, and in this embodiment, the seal ring 117 is made of high elastic rubber.
Specifically, the first seal 1172 of the seal 117 is sized to fit the first structure 116 and the second structure 118, and the second seal 1174 of the seal 117 is sized to fit the cable 220. When the cable intermediate joint 210 needs to be tested, the second sealing parts 1174 of the sealing rings 117 are sleeved on the cables 220 at two ends of the cable intermediate joint 210, the cable intermediate joint 210 is placed in the sealing cavity 112, the first structural body 116 and the second structural body 118 are closed through the sealing teeth 119, and the first sealing parts 1172 of the sealing rings 117 are positioned at openings at two sides of the cavity, so that the sealing effect at two ends of the sealing cavity 112 is enhanced.
In addition, the sealing structure 110 may further include a clamp, where the clamp is used to clamp the first structure 116 and the second structure 118 after the sealing teeth 119 are closed, so as to further improve the sealing effect of the sealing structure 110, and facilitate testing of the cable intermediate connector 210.
In the cable intermediate joint sealing performance testing device, after the vacuum pump 122 is utilized to inflate or exhaust air, the air pressure value detected by the digital pressure sensor module 124 can reflect the air pressure change of the sealing cavity 112, so as to evaluate the sealing performance of the cable intermediate joint 210, and the testing reliability is high.
In one embodiment, a method for testing the sealing performance of the cable intermediate joint is further provided, and the method is realized based on the device for testing the sealing performance of the cable intermediate joint, and comprises the following steps: after the vacuum pump is controlled to carry out inflation or air extraction, the electromagnetic air valve is turned off; and acquiring the air pressure value detected by the digital pressure sensor module, and analyzing according to the air pressure value to obtain a cable intermediate joint sealing performance test result. Further, after the vacuum pump is controlled to perform inflation or air extraction, the electromagnetic air valve is turned off after the digital pressure sensor module detects that the air pressure reaches the corresponding air pressure threshold, the air pressure detected by the digital pressure sensor module in the air pressure holding time is recorded, and a cable intermediate joint sealing performance test result is obtained according to the recorded air pressure change condition in the air pressure holding time.
According to the cable intermediate joint sealing performance testing method, after the vacuum pump is utilized to inflate or exhaust, the air pressure value detected by the digital pressure sensor module can reflect the air pressure change of the sealing cavity, so that the sealing performance of the cable intermediate joint is evaluated, and the testing reliability is high.
In order to facilitate a better understanding of the above-described cable intermediate joint sealing performance test apparatus and method, a detailed explanation will be given below with reference to specific embodiments.
As described in the background, it is often necessary to connect two lengths of cable together by way of a cable intermediate head when the cable is laid. The operation quality of the cable middle head is critical, and the key that whether the whole line can safely run can be influenced. In cable accidents counted by the electric industry, more than 90% are caused by the middle head of the cable. In the operation specification of the cable middle head, the waterproof effect of the middle head is ensured mainly aiming at the technological requirements of operation, such as the winding mode of waterproof adhesive tapes, the use of moisture-proof mud and the like. After the completion of the operation, it is difficult to find out the process and the actual sealing performance. In the conventional cable test method, an oscillatory wave test, a withstand voltage test, an insulation resistance test, and the like are adopted, but the tightness of the cable intermediate joint cannot be detected.
Therefore, the application designs the cable intermediate head sealing performance sample device, the sealing cavity and the test device are used for judging the sealing performance of the cable intermediate head after the operation is finished, and a digital visual test is carried out on the sealing performance of the cable intermediate head, if the sealing performance is found to be lower than an index value, an operator is required to dismantle the cable intermediate head for construction again, the whole cable is prevented from running with potential safety hazard, the safety risk is reduced, simultaneously, larger property loss is avoided, and the power supply reliability of a power grid is improved.
Specifically, the cable intermediate head sealing performance test device comprises a sealing cavity structure and a test device. The sealing cavity structure is provided with an air nozzle, the sealing cavity is inflated or deflated through a connecting air pipe, the whole sealing cavity structure is formed by two half hollow cylinders, the two half hollow cylinders are bonded together, the other side is separated, the middle head of the finished cable can be wrapped through the side of the opening, and then the opening side is tightly pressed and sealed through a clamp, so that a sealed cavity is formed around the middle head of the cable, and the sealing performance of the middle head of the cable is tested through the operation of adding air pressure or pumping negative pressure to the sealing cavity. Two sealing rings are arranged at two ends of the sealing cavity and made of high-elasticity rubber, so that the sealing effect at two ends of the sealing cavity is enhanced.
After the cable middle head is wrapped by the sealing cavity, the sealing joint is clamped by the rapid high-force clamp, so that the sealing effect is improved. An air drier is connected in front of the air inlet nozzle of the sealing cavity, so that air with overhigh humidity is prevented from entering the middle of the cable due to poor manufacture of a cable middle joint under high pressure.
The test device consists of a control circuit board, a vacuum pump, an electromagnetic air valve, a man-machine interface panel, a storage battery, a digital pressure sensor module, a shell and other unit circuits. The air outlet of the vacuum pump is connected with the air inlet of the electromagnetic air valve through an air pipe, the air outlet end of the electromagnetic air valve is connected with the air inlet of the air pressure sensor through an air pipe, and the air outlet of the digital pressure sensor is connected with the air inlet of the air receiving nozzle through an air pipe.
The man-machine interface panel consists of a display screen and a driving circuit and is connected with the control circuit board through a flat cable. Parameters such as inflation pressure, air pressure holding time, alarm air pressure value and the like can be set and adjusted through buttons on the interface panel, the sealing performance of the cable middle head can be automatically judged through setting the parameters, and if the reduction amount exceeds the set threshold value after the air pressure is held for a certain time, the test device gives out alarm.
The digital pressure sensor module comprises a high-precision sub-resistance pressure sensor and an ADC interface IC (INTEGRATED CIRCUIT ), the module is connected with a control circuit board through a connecting flat cable, a connecting cable provides power for the module from the control circuit board, and a data cable is an interface circuit communication line on the module and the control circuit board and is responsible for data transmission of the digital pressure sensor module.
The storage battery provides power for the control circuit board, the man-machine interface panel and the digital pressure sensor, and the storage battery adopts a rechargeable battery which can be repeatedly used after being charged through a charger. The control circuit board consists of a control MCU, an interface circuit and a charge and discharge management circuit, and is arranged together through the printed circuit board.
The testing process of the cable intermediate head sealing performance testing device is as follows:
1. The test device is connected with the air nozzle on the sealing cavity structure through the air pipe, and the air pipe connector adopts a standard quick connector, so that the connection can be completed quickly.
2. And (3) turning on a power switch of the test device, starting the test device, and setting test parameters such as inflation pressure, air pressure holding time, air pressure alarm threshold value and the like through a human-computer interface panel.
3. After the above arrangement is completed, the sealed chamber is inflated (positive pressure test). When the air pressure reaches a set value, the controller controls the electromagnetic air valve to switch off the air pipe to stop inflation. The digital air pressure sensor monitors the air pressure in the sealed cavity.
4. After the positive pressure test is completed, the negative pressure test is carried out, related parameters are set, then the vacuum pump is started to exhaust, the air in the sealing cavity is exhausted, the negative pressure is formed in the sealing cavity, the air pump is stopped after the air pressure reaches a set value, the electromagnetic air valve is closed, the air pressure value in the sealing cavity is detected, and an audible and visual alarm prompt tone is emitted when the air pressure value is higher than the set value.
Before the middle joint of the cable is manufactured, the sealing rings are sleeved on two sections of wires which are not connected, and before the sealing cavity is folded in half, the sealing rings are placed at the openings at the two sides of the cavity, so that the sealing effect at the two ends of the cavity is enhanced. After the test is completed, the cavity is removed, and the sealing ring is cut off and taken off from the cable.
After the operation of the cable intermediate head is finished, digital test evaluation is carried out on the operation effect, namely the sealing performance, of the cable intermediate head, whether the cable intermediate head connector can meet the safety level requirement is checked through direct digital indexes, and the cable intermediate head which does not reach the standard is reworked and reinstalled through the test, so that the safety risk of the cable intermediate head can be reduced, and meanwhile, the property loss is reduced.
The cable middle head sealing performance test device has the following beneficial effects:
1. The test can be performed on the constructed cable middle head at the operation site rapidly, the test result is displayed digitally, and whether the construction process of the cable middle head is qualified or not is simply and intuitively reflected.
2. The portable structure, sealed cavity and test device are disconnect-type, conveniently go out to carry, couple together through the trachea when using. The test device is internally provided with the miniature air compression pump and is powered by the storage battery, compressed air enters the sealing cavity, and the test device is light and convenient, and does not need an external air compressor as an inflator pump.
3. The middle head of the cable inspected by the test equipment is safer and more reliable, and compared with the prior visual inspection method which depends on experience and process specification in operation, the accuracy of judgment is higher and more reasonable.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. The cable intermediate joint sealing performance testing device is characterized by comprising a sealing structure and a testing device, wherein the sealing structure is provided with a sealing cavity for placing the cable intermediate joint, a cable extends to the outside of the sealing structure, and sealing materials are arranged at the position of an opening where the cable extends out of the sealing structure; the test device comprises a control circuit board, a vacuum pump, an electromagnetic air valve and a digital pressure sensor module, wherein an air inlet of the electromagnetic air valve is connected with the vacuum pump through an air pipe, an air outlet of the electromagnetic air valve is connected with an air inlet of the digital pressure sensor module through an air pipe, an air outlet of the digital pressure sensor module is communicated with the sealing cavity through an air pipe, and the control circuit board is connected with the vacuum pump, the electromagnetic air valve and the digital pressure sensor module through data lines;
The control circuit board is used for controlling the vacuum pump to inflate or deflate the sealing cavity, then switching off the electromagnetic air valve, collecting the air pressure value detected by the digital pressure sensor module, analyzing the air pressure change condition in the sealing cavity, and analyzing and obtaining the sealing performance test result of the cable intermediate connector according to the air pressure change condition;
The sealing structure comprises a structure body; the structure body comprises a first structure body and a second structure body, one side of the first structure body is connected with one side of the second structure body, and sealing teeth are arranged on the other side of the first structure body and the other side of the second structure body;
the sealing structure further comprises sealing rings, wherein the first structural body and the second structural body are of semi-cylindrical structures, and the sealing rings are arranged at two opposite ends of the first structural body and the second structural body when the first structural body and the second structural body are closed through sealing teeth; wherein the sealing ring comprises a first sealing part matched with the first structural body and the second structural body and a second sealing part matched with the cable;
When the cable intermediate joint is tested, the second sealing parts are sleeved on the cables at the two ends of the cable intermediate joint, after the cable intermediate joint is placed in the sealing cavity, the first structural body and the second structural body are closed through the sealing teeth, and the first sealing parts are positioned at the openings at the two sides of the cavity, so that the sealing effect at the two ends of the sealing cavity is enhanced.
2. The device for testing the sealing performance of the cable intermediate joint according to claim 1, wherein the control circuit board is used for controlling the vacuum pump to perform inflation or air suction, the electromagnetic air valve is turned off after the digital pressure sensor module is used for detecting that the air pressure reaches the corresponding air pressure threshold value, the air pressure detected by the digital pressure sensor module in the set air pressure keeping time is recorded, and the cable intermediate joint sealing performance testing result is obtained according to the recorded air pressure change condition in the air pressure keeping time.
3. The cable intermediate head sealing performance testing device according to claim 1, wherein the sealing structure further comprises an air nozzle, the air nozzle is arranged on the structural body and communicated with the sealing cavity, and the air nozzle is connected with an air outlet of the digital pressure sensor module through an air pipe.
4. The cable intermediate joint sealing performance testing device according to claim 1, wherein the vacuum pump is a micro air compression pump.
5. The cable intermediate joint sealing performance testing device of claim 1, wherein the sealing structure further comprises a clamp for clamping after the first and second structures are closed by the sealing teeth.
6. The cable intermediate joint sealing performance testing device according to any one of claims 1-5, wherein the digital pressure sensor module comprises a pressure sensor and an ADC interface chip, the ADC interface chip connecting the pressure sensor and the control circuit board.
7. The cable intermediate joint sealing performance test apparatus of any one of claims 1-5, wherein the test apparatus further comprises a human interface panel and an energy storage device coupled to the control circuit board.
8. The cable intermediate joint sealing performance test device of claim 7, wherein the human interface panel includes an alarm circuit connected to the control circuit board.
9. The cable intermediate head sealing performance test device according to claim 7, wherein the control circuit board comprises a controller, an interface circuit and a charge-discharge management circuit, the controller is connected with the interface circuit and is connected with the energy storage device through the charge-discharge management circuit, and the interface circuit is connected with the vacuum pump, the electromagnetic air valve, the digital pressure sensor module and the man-machine interface panel through data wires.
10. A method for testing the sealing performance of a cable intermediate joint, which is realized based on the device for testing the sealing performance of the cable intermediate joint according to any one of claims 1 to 9, and comprises the following steps:
After the vacuum pump is controlled to carry out inflation or air extraction, the electromagnetic air valve is turned off;
and acquiring the air pressure value detected by the digital pressure sensor module, and analyzing according to the air pressure value to obtain a cable intermediate joint sealing performance test result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294618.XA CN113932998B (en) | 2021-11-03 | 2021-11-03 | Device and method for testing sealing performance of cable intermediate connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294618.XA CN113932998B (en) | 2021-11-03 | 2021-11-03 | Device and method for testing sealing performance of cable intermediate connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113932998A CN113932998A (en) | 2022-01-14 |
| CN113932998B true CN113932998B (en) | 2024-05-24 |
Family
ID=79285411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111294618.XA Active CN113932998B (en) | 2021-11-03 | 2021-11-03 | Device and method for testing sealing performance of cable intermediate connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113932998B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116164913B (en) * | 2023-04-24 | 2023-08-04 | 日照市计量科学研究院 | Air tightness testing device for cable connector |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2713341A1 (en) * | 1993-12-03 | 1995-06-09 | Equip Telecomm Ind Cie Fse | Gas-tightness testing appts. for cable splices |
| EP2413123A1 (en) * | 2010-07-31 | 2012-02-01 | F.E. Schulte Strathaus GmbH & Co. Kg | Leak testing device and method |
| CN105606319A (en) * | 2016-03-29 | 2016-05-25 | 三峡大学 | Test device and method for detecting sealing performance of waterproof strip of power cable |
| CN108663177A (en) * | 2018-07-10 | 2018-10-16 | 中国信息通信研究院 | A kind of connector box method for conducting leak test and device |
| CN108828368A (en) * | 2016-06-06 | 2018-11-16 | 丽水市信裕机械制造有限公司 | Seepage of water experimental rig at power cable connector |
| CN112197919A (en) * | 2020-09-02 | 2021-01-08 | 国网福建省电力有限公司 | Cable joint leakproofness detection device |
| CN112462204A (en) * | 2020-10-19 | 2021-03-09 | 深圳供电局有限公司 | Cable middle head partial discharge detection device and online monitoring system |
-
2021
- 2021-11-03 CN CN202111294618.XA patent/CN113932998B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2713341A1 (en) * | 1993-12-03 | 1995-06-09 | Equip Telecomm Ind Cie Fse | Gas-tightness testing appts. for cable splices |
| EP2413123A1 (en) * | 2010-07-31 | 2012-02-01 | F.E. Schulte Strathaus GmbH & Co. Kg | Leak testing device and method |
| CN105606319A (en) * | 2016-03-29 | 2016-05-25 | 三峡大学 | Test device and method for detecting sealing performance of waterproof strip of power cable |
| CN108828368A (en) * | 2016-06-06 | 2018-11-16 | 丽水市信裕机械制造有限公司 | Seepage of water experimental rig at power cable connector |
| CN108663177A (en) * | 2018-07-10 | 2018-10-16 | 中国信息通信研究院 | A kind of connector box method for conducting leak test and device |
| CN112197919A (en) * | 2020-09-02 | 2021-01-08 | 国网福建省电力有限公司 | Cable joint leakproofness detection device |
| CN112462204A (en) * | 2020-10-19 | 2021-03-09 | 深圳供电局有限公司 | Cable middle head partial discharge detection device and online monitoring system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113932998A (en) | 2022-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203785851U (en) | Lithium ion battery automation leakage detection equipment | |
| CN113932998B (en) | Device and method for testing sealing performance of cable intermediate connector | |
| CN105352677A (en) | Sealing testing apparatus of power battery pack | |
| CN113607354A (en) | Battery pack air tightness detection method and detection system | |
| KR20030003603A (en) | Apparatus of a global Assessment of Cables Insulation and Method for globally Assessmenting as the same | |
| CN105823607A (en) | Airtightness detection apparatus of power supply module | |
| CN208226139U (en) | Electrical vehicle charging connection device | |
| CN211425793U (en) | Transformer conservator sealing detection device | |
| CN109708974A (en) | A kind of gas receiver Withstand test device | |
| CN211377369U (en) | Intelligent power distribution station sulfur hexafluoride detection device | |
| CN205427045U (en) | Resistance detection appearance on section of thick bamboo bullet | |
| CN208984671U (en) | Finished product testing device is used in electronic product production | |
| CN207081528U (en) | A kind of detection device for the detection of cavity product hermeticity | |
| CN211651983U (en) | Motor gas tightness detection device | |
| CN208968772U (en) | Airtight detection structure of connector | |
| CN207395988U (en) | A kind of four-way air-leakage detector | |
| CN207148284U (en) | Miniature SF6Trace gas collection device | |
| CN207343185U (en) | Rechargeable glue injection machine | |
| CN110702341A (en) | Transformer conservator sealing detection device | |
| CN206725144U (en) | Battery formation pressure tester | |
| CN208749524U (en) | One kind is electronic to vacuumize controller | |
| CN104458165A (en) | Insulating glove sealing performance detecting method | |
| CN210487749U (en) | Portable environment monitoring instrument | |
| CN218865410U (en) | Air tightness detection jig and air tightness detection system | |
| CN209358536U (en) | Portable gas is as with communication line tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |