CN114441114B - Cable sheath sealing performance detection device and method - Google Patents
Cable sheath sealing performance detection device and method Download PDFInfo
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- CN114441114B CN114441114B CN202210358215.5A CN202210358215A CN114441114B CN 114441114 B CN114441114 B CN 114441114B CN 202210358215 A CN202210358215 A CN 202210358215A CN 114441114 B CN114441114 B CN 114441114B
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- 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
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Abstract
The invention provides a device and a method for detecting the sealing performance of a cable sheath, and belongs to the technical field of cable detection equipment. The technical scheme is as follows: the cable protection cover comprises a sealing cover which can be sleeved on the outer side of a cable protection cover, annular air bags are respectively arranged at positions close to two ends in the sealing cover, the outer ring surface of each air bag is connected with the inner wall of the sealing cover in a sealing mode, and closed spaces can be formed among the air bags at the two ends, the sealing cover and the sleeved cable protection cover; the sealing cover is provided with a gas pipe and an exhaust pipe which are communicated with the closed space, the gas pipe is connected with the first air pump, the gas pipe and the exhaust pipe are both provided with valves, and the sealing cover is provided with a pressure detection device for detecting the air pressure in the closed space; and the air inlet pipes of all the air bags extend out of the sealing cover and are connected with the air pump II through a tee joint. The invention has the beneficial effects that: the sealing performance of the cable sheath can be detected.
Description
Technical Field
The invention relates to the technical field of cable detection equipment, in particular to a device and a method for detecting the sealing performance of a cable sheath.
Background
The cable sheath is generally formed by finely cutting a copper strip, an aluminum strip or a stainless steel strip, longitudinally wrapping and forming through a special die, continuously butting and longitudinally welding under the protection of inert gas, and then stretching and sizing (or embossing). The cable sheath formed by welding has a longitudinal weld seam in the longitudinal direction, and the butt joint of the copper belt, the aluminum belt or the stainless steel belt has an annular weld seam. In the actual welding process, the welding seam sometimes has the defects of pinholes and false welding, the defects can influence the sealing property of a cable sheath, the cable is easily oxidized, even a water inlet phenomenon is generated in the later use process, and potential safety hazards exist. Therefore, how to ensure the sealing performance of the cable sheath in the production process is crucial.
Disclosure of Invention
The invention aims to provide a device and a method for detecting the sealing performance of a cable sheath on a production line of the cable sheath.
The invention is realized by the following measures: a cable sheath sealing performance detection device comprises a sealing cover capable of being sleeved on the outer side of a cable sheath, annular air bags are respectively arranged at positions close to two ends in the sealing cover, the outer ring surface of each air bag is connected with the inner wall of the sealing cover in a sealing mode, and a closed space can be formed among the air bags at the two ends, the sealing cover and the sleeved cable sheath;
the sealing cover is provided with a gas pipe and an exhaust pipe which are communicated with the closed space, the gas pipe is connected with a first air pump, the gas pipe and the exhaust pipe are both provided with valves, and the sealing cover is provided with a pressure detection device for detecting the air pressure in the closed space;
and the air inlet pipe and the air outlet pipe are arranged on the air bag, valves are arranged on the air inlet pipe and the air outlet pipe, and all the air inlet pipes of the air bag extend out of the sealing cover and are connected with the air pump II through a tee joint.
Two ends of the sealing cover are respectively provided with at least two air bags.
The sealing cover is integrally formed. Before use, the cable sheath needs to be placed on the traveling path of the cable sheath in advance, and the starting end of the cable sheath firstly passes through the sealing cover and the air bag.
In addition, the sealed cowling can adopt two symmetrical structure concatenations to form, the gasbag is for the cyclic annular gasbag that has the breach just the gasbag aerifys the back, breach department can contact and form the cover and establish the ring body that plays the sealing effect between cable sheath and sealed cowling, two the symmetrical structure passes through the detachable connecting piece and connects, the connecting piece generally is the bolt. The two symmetrical structures are provided with annular grooves for placing the air bags; the two symmetrical structures can be formed by butt joint of the open ends of two rectangular box bodies or semicircular box bodies; two be provided with the sealing strip on the working face of symmetrical structure, two working faces all are provided with the recess, the sealing strip sets up in the recess. Therefore, the device does not need to be placed on the advancing path of the cable sheath in advance when measurement is carried out at the later stage, and the use is more flexible.
The sealing cover is arranged on the rack through a lifting mechanism, and the lifting mechanism can do reciprocating linear motion on the rack along the advancing direction of the cable sheath.
The lifting mechanism comprises a sliding bottom plate and a stud rotatably arranged on the sliding bottom plate, guide rods are symmetrically arranged on the sliding bottom plate and positioned on two sides of the stud, a sleeve with internal threads is fixedly arranged on the outer wall of the sealing cover, the sleeve is arranged at the upper end of the stud through threaded connection, an ear plate is arranged on the side wall of the sealing cover, the two guide rods penetrate through the ear plate, and a hand wheel for driving the stud is arranged at the lower end of the stud;
the frame includes the base, the bilateral symmetry of base is provided with the spout, sliding bottom's both ends slide to be set up in the spout.
The rack also comprises support plates arranged below two ends of the base, a screw rod is rotatably arranged between the two support plates, the screw rod is connected with the sliding bottom plate through a driving assembly, and one end of the screw rod extends out of the support plates and is connected with a motor with a speed reducer;
the driving assembly comprises a nut formed by splicing two semicircular rings and external horizontal plates arranged on the side walls on the same side of the two semicircular rings, and springs are arranged on the non-adjacent end surfaces of the two external horizontal plates;
a long strip opening is formed in the side wall of the sliding chute, one end of the sliding bottom plate extends out of the long strip opening, a vertical plate is fixedly arranged below the extending end, a rectangular opening is formed in the vertical plate, the two external horizontal plates are slidably arranged in the rectangular opening and are arranged on the inner wall of the rectangular opening through the springs, and the two semicircular rings are spliced into the nut under the action of the two springs;
the vertical plate is provided with a limiting block on one side of the rectangular opening in a sliding mode, a limiting groove matched with the limiting block is formed in the adjacent end face of each external horizontal plate, and the limiting block stretches into the limiting groove to enable the two external horizontal plates and the two semicircular rings to be separated.
And ejector rods matched with the limiting blocks are arranged on the two supporting plates, one ejector rod on the supporting plate is used for ejecting the limiting blocks into the limiting grooves, and the other ejector rod on the supporting plate is used for ejecting the limiting blocks out of the limiting grooves.
The vertical plate is provided with a fixed plate, the fixed plate is provided with a slideway allowing the limiting block to slide, and the limiting block is arranged in the slideway. Be provided with on the slide and be used for fixing the spring catch of stopper, the stopper is located can pass through when in the slide the spring catch is fixed, keep away from on the slide the one end of spacing groove is provided with the baffle, the baffle can prevent the stopper roll-off the slide.
The limiting block and the limiting groove working surface are inclined surfaces.
The both ends of stopper all are provided with position sensor, position sensor is used for gathering and the adjacent backup pad between the distance, the valve all adopts the solenoid valve.
The pressure detection device can be a pressure gauge or a pressure sensor.
The working principle is as follows: placing the rack at a specified position, rotating the hand wheel, adjusting the position of the sealing cover, and installing the sealing cover on a cable sheath to be tested on the assembly line;
the limiting block is enabled to be close to the supporting plate and extend into the limiting groove at the initial position, and the two semicircular rings are in a separated state;
the air bag is inflated by the air pump II until a closed space can be formed among the air bag, the sealing cover and the sheathed cable sheath at the two ends; the first air pump quickly injects air with certain pressure into the sealing cover, and the air bag clamps the cable sheath at the moment, so that the sealing cover moves along with the cable sheath, and the pressure detection device measures the pressure in the sealing cover in real time;
when the limiting block is in contact with the ejector rod at one end, the air bag and the sealing cover begin to exhaust, the control of the exhaust valve can transmit signals to the controller through the position sensor, the control of the exhaust valve is realized through the controller, the ejector rod penetrates through the limiting groove to eject the limiting block out of the limiting groove, the two semicircular rings are in contact under the action of the spring to form a nut, the motor is started, the screw rod rotates, and the nut and the sliding bottom plate are driven to move back;
when the limiting block is contacted with the ejector rod at the other end, the ejector rod pushes the limiting block into the limiting groove, and the limiting block pushes the two external horizontal plates out, so that the two semicircular rings are separated and return to the initial state; at the moment, the air bag and the sealing cover are sequentially inflated, the air inlet valve and the air pump can be controlled by transmitting signals to the controller through the position sensor, and the air inlet valve and the air pump can be controlled by the controller.
In order to better achieve the purpose of the invention, the invention also provides a cable sheath sealing performance detection method of the cable sheath sealing performance detection device, which specifically comprises the following steps:
sleeving the sealing cover on the cable sheath, inflating the air bag through the air pump II to enable the air bag at two ends, the sealing cover and the sleeved cable sheath to form a closed space, and quickly inflating air with certain pressure into the sealing cover through the air pump I;
after the sealing cover travels a fixed distance along with the cable sheath, whether the section of the cable sheath has defects is judged according to the change of the internal pressure value of the sealing cover within a certain time. The internal pressure value of the sealing cover can be measured by a pressure gauge or a pressure sensor.
The value of the gas pressure rushing into the sealing cover in advance can be determined according to actual conditions, the value of the gas pressure rushing into the sealing cover in advance and the value of the pressure after a certain distance of travel can be preset after a plurality of actual measurement tests, the standard range value of the difference value between the two pressure values can be preset, if the difference value measured in the front and back exceeds the standard range value, the cable sheath has defects, and at the moment, the marking and the recording can be carried out manually.
In addition, a corresponding alarm can be designed according to the prior art, the standard range value is prestored in a storage unit of the controller, the controller is used for collecting the measured value of the pressure gauge or the pressure sensor, the measured value is compared with the standard range value after calculation, and when the measured value exceeds the marked range value, the controller is used for controlling the alarm to give an alarm. The collection of the pressure value and the calculation of the difference value can be realized by adopting the prior art, and are not described again.
Compared with the prior art, the invention has the beneficial effects that: the sealing performance of the cable sheath can be detected on a production line of the cable sheath; detecting the defects of the cable sheath through the air pressure difference values before and after the detection; because this device uses on the assembly line, through the clamp of gasbag, realize the sealed cowling can advance along with cable sheathing, through two the nut that semi-circular constitutes cooperates corresponding stopper and ejector pin, realizes the automatic re-setting of sealed cowling.
Drawings
FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic structural view of the sealing boot;
FIG. 4 is a schematic structural view of the telescoping mechanism and its associated parts;
FIG. 5 is a schematic structural view of a nut, a spring and a stopper;
FIG. 6 is a schematic view of a symmetrical structure;
FIG. 7 is a schematic view of a frame;
FIG. 8 is a schematic structural view of the sliding bottom plate and the vertical plate;
FIG. 9 is a schematic structural view of the sealing cap in an integral arrangement;
wherein the reference numbers are: 1. a cable jacket; 2. a sealing cover; 3. an air bag; 4. a lifting mechanism; 5. a frame; 6. a vertical plate; 7. a screw; 8. a semicircular ring; 9. a limiting block; 201. a pressure detection device; 202. an electromagnetic valve of the gas transmission pipe; 203. an ear plate; 204. an electromagnetic valve of the exhaust pipe; 205. a sleeve; 206. an annular groove; 207. a groove; 301. an air inlet pipe; 302. an air outlet pipe; 401. a sliding bottom plate; 402. a stud; 403. a guide bar; 404. a hand wheel; 405. a bearing seat; 501. a base; 502. a chute; 503. a strip opening; 504. a support plate; 505. a top rod; 601. a spring; 602. a fixing plate; 603. a slideway; 604. a rectangular opening; 701. a motor; 801. a horizontal plate is externally connected; 802. a limiting groove; 901. an inclined surface; 902. and a spring pin.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
The first embodiment is as follows:
referring to fig. 3 and 9, the present embodiment is a cable sheath sealing performance detection apparatus, including a sealing cover 2 that can be sleeved outside a cable sheath 1, annular airbags 3 are respectively disposed inside the sealing cover 2 near two ends, an outer annular surface of each airbag 3 is hermetically connected to an inner wall of the sealing cover 2, and a closed space can be formed between each airbag 3 at two ends, the sealing cover 2, and the sleeved cable sheath 1;
a gas pipe and an exhaust pipe which are communicated with the closed space are arranged on the sealing cover 2, the gas pipe is connected with the first air pump, valves are arranged on the gas pipe and the exhaust pipe, and a pressure detection device 201 for detecting the air pressure in the closed space is arranged on the sealing cover 2;
an air inlet pipe 301 and an air outlet pipe 302 are arranged on the air bag 3, valves are arranged on the air inlet pipe 301 and the air outlet pipe 302, and the air inlet pipes 301 of all the air bags 3 extend out of the sealing cover 2 and are connected with a second air pump through a tee joint.
At least two air bags 3 are respectively arranged at two ends of the sealing cover 2.
The sealing cover 2 is integrally formed. Before use, the cable sheath 1 needs to be placed on the traveling path of the cable sheath 1 in advance, and the starting end of the cable sheath 1 firstly passes through the sealing cover 2 and the air bag 3.
When the device is used, the device is sleeved at a position to be measured of a cable sheath, the air bag 3 is inflated by the air pump to enable the air bag 3 to be in close contact with the cable sheath, a closed space is formed among the air bag 3, the sealing cover 2 and the cable sheath, and gas with certain pressure is rapidly inflated into the closed space by the air pump; and judging whether the cable sheath has defects according to the change of the pressure value in a certain time.
The device can also be applied to a production line of the cable sheath, the device can be arranged at the tail end of the production line in the early production period, and the front end of the cable sheath passes through the device, so that the tightness of the cable sheath can be checked at intervals; specifically, the position of the sheath to be detected is selected, the air bag is clamped on the sheath to be detected in the mode and moves synchronously along the production advancing direction of the cable sheath, the pressure change in a certain time is observed, and after the detection is finished, the resetting preparation for the next section of spot inspection is realized through the moving mechanism.
Example two:
referring to fig. 3 and 6, the present embodiment is different from the first embodiment in the specific structure of the sealing cover 2 and the airbag 3,
sealing cover 2 except integrated into one piece, can also adopt two symmetrical structure concatenations to form, gasbag 3 then for the annular gasbag 3 that has the breach and the gasbag 3 back of aerifing, breach department can contact and form the cover and establish the ring body that plays the sealing effect between cable sheathing 1 and sealing cover 2, and two symmetrical structure pass through the detachable connecting piece to be connected, and the connecting piece generally is the bolt. Two symmetrical structures are provided with annular grooves 206 for placing the air bags 3; the two symmetrical structures can be formed by butting the open ends of two rectangular box bodies or semicircular box bodies; sealing strips are arranged on the working surfaces of the two symmetrical structures, grooves 207 are formed in the two working surfaces, and the sealing strips are arranged in the grooves 207. Therefore, the device is convenient to measure in the later period, the device does not need to be placed on the advancing path of the cable sheath 1 in advance, and the use is more flexible.
Example three:
on the basis of the first embodiment or the second embodiment, referring to fig. 1 to 9, in this embodiment, the sealing cap 2 is disposed on the frame 5 through the lifting mechanism 4, and the lifting mechanism 4 can perform reciprocating linear motion on the frame 5 along the traveling direction of the cable sheath 1.
The lifting mechanism 4 comprises a sliding bottom plate 401 and a stud 402 rotationally arranged on the sliding bottom plate 401, the stud 402 is rotationally arranged on the sliding bottom plate 401 through a bearing, the bearing is fixed through a bearing seat 405, guide rods 403 are symmetrically arranged on the sliding bottom plate 401 and positioned on two sides of the stud 402, a sleeve 205 with internal threads is fixedly arranged on the outer wall of the sealing cover 2, the sleeve 205 is arranged at the upper end of the stud 402 through threaded connection, an ear plate 203 is arranged on the side wall of the sealing cover 2, the two guide rods 403 both penetrate through the ear plate 203, and a hand wheel 404 for driving the stud 402 is arranged at the lower end of the stud 402; the height of the sealing cap 2 can be adjusted by the lifting mechanism 4 to adapt to production lines of different heights.
The frame 5 includes a base 501, sliding grooves 502 are symmetrically arranged on two sides of the base 501, and two ends of the sliding bottom plate 401 are slidably arranged in the sliding grooves 502.
The rack 5 further comprises support plates 504 arranged below two ends of the base 501, a screw 7 is rotatably arranged between the two support plates 504, the screw 7 is connected with the sliding bottom plate 401 through a driving assembly, and one end of the screw 7 extends out of the support plates 504 to be connected with a motor 701 with a speed reducer;
the driving assembly comprises a nut formed by splicing two semicircular rings 8 and external horizontal plates 801 arranged on the side walls of the two semicircular rings 8 on the same side, and springs 601 are arranged on the end faces of the two external horizontal plates 801 which are not adjacent;
a long strip opening 503 is formed in the side wall of the sliding groove 502, one end of the sliding bottom plate 401 extends out of the long strip opening 503, a vertical plate 6 is fixedly arranged below the extending end, a rectangular opening 604 is formed in the vertical plate 6, two external horizontal plates 801 are arranged in the rectangular opening 604 in a sliding mode and are arranged on the inner wall of the rectangular opening 604 through springs 601, and the two semicircular rings 8 are spliced into a nut under the action of the two springs 601;
a limiting block 9 is slidably arranged on one side of the vertical plate 6, which is located at the rectangular opening 604, a limiting groove 802 matched with the limiting block 9 is arranged on the adjacent end surfaces of the two external horizontal plates 801, and the limiting block 9 extends into the limiting groove 802 to separate the two external horizontal plates 801 from the two semicircular rings 8.
The two supporting plates 504 are respectively provided with a top rod 505 matched with the limiting block 9, the top rod 505 on one supporting plate 504 is used for ejecting the limiting block 9 into the limiting groove 802, and the top rod 505 on the other supporting plate 504 is used for ejecting the limiting block 9 out of the limiting groove 802.
A fixing plate 602 is arranged on the vertical plate 6, a slide 603 allowing the limiting block 9 to slide is arranged on the fixing plate 602, and the limiting block 9 is arranged in the slide 603. The slide 603 is provided with a spring pin 902 for fixing the limit block 9, the limit block 9 can be fixed by the spring pin 902 when being positioned in the slide 603, one end of the slide 603, which is far away from the limit groove 802, is provided with a baffle plate, and the baffle plate can prevent the limit block 9 from sliding out of the slide 603.
The working surfaces of the limiting block 9 and the limiting groove 802 are inclined surfaces 901.
Both ends of the limiting block 9 are provided with position sensors, the position sensors are used for collecting the distance between the limiting block and the adjacent supporting plate 504, and the valves are all electromagnetic valves. The figures only show the solenoid valve 202 of the gas pipe and the solenoid valve 204 of the gas exhaust pipe on the sealing cap 2.
The pressure detecting device 201 may be a pressure gauge or a pressure sensor.
The specific working principle at this time is as follows: placing a rack 5 at a designated position, rotating a hand wheel 404, adjusting the position of a sealing cover 2, and installing the sealing cover 2 on a cable sheath 1 to be tested on a production line;
in the initial position, the limit block 9 is ensured to be close to the support plate 504, the limit block 9 extends into the limit groove 802, and the two semicircular rings 8 are in a separated state;
the air bag 3 is inflated by the air pump II until a closed space can be formed among the air bags 3 at the two ends, the sealing cover 2 and the sleeved cable sheath 1; gas with certain pressure is rapidly injected into the sealing cover 2 through the first air pump, and the air bag 3 clamps the cable sheath 1 at the moment, so that the sealing cover 2 moves along with the cable sheath 1, and the pressure detection device 201 measures the pressure in the sealing cover 2 in real time;
when the limiting block 9 is contacted with the ejector rod 505 at one end, the air bag 3 and the sealing cover 2 start to exhaust, the control of the exhaust valve can transmit signals to the controller through the position sensor, the control of the exhaust valve is realized through the controller, the ejector rod 505 penetrates through the limiting groove 802 to eject the limiting block 9 out of the limiting groove 802, the two semicircular rings 8 are contacted under the action of the spring 601 to form a nut, the motor 701 is started, the screw 7 rotates, and the nut and the sliding bottom plate 401 are driven to move back;
when the limiting block 9 is contacted with the ejector rod 505 at the other end, the ejector rod 505 ejects the limiting block 9 into the limiting groove 802, the limiting block 9 ejects the two external horizontal plates 801, so that the two semicircular rings 8 are separated and return to the initial state; at the moment, the air bag 3 and the sealing cover 2 are sequentially inflated, the air inlet valve and the air pump can be controlled by transmitting signals to the controller through the position sensor, and the air inlet valve and the air pump can be controlled through the controller.
Example four:
the present embodiment is a method for detecting the sealing performance of a cable sheath according to the device for detecting the sealing performance of a cable sheath in the first embodiment, the second embodiment and the third embodiment, and referring to fig. 1 to 9, the method specifically includes: sleeving the sealing cover 2 on the cable sheath 1, inflating the air bags 3 through the air pump II to enable the air bags 3 at two ends, the sealing cover 2 and the sleeved cable sheath 1 to form a closed space, and quickly filling air with a certain pressure into the sealing cover 2 through the air pump I;
after the sealing cover 2 travels a fixed distance along with the cable sheath 1, whether the section of the cable sheath 1 has defects is judged according to the change of the pressure value in the sealing cover 2 within a certain time. The pressure value inside the sealed housing 2 can be measured by a pressure gauge or a pressure sensor.
Example five:
on the basis of the fourth embodiment, referring to fig. 1 to 9, the present embodiment specifically includes: the value of the gas pressure rushing into the sealing cover 2 in advance can be determined according to actual conditions, the value of the gas pressure rushing into the sealing cover 2 in advance and the value of the pressure after a certain distance of travel can be preset after a plurality of actual measurement tests, the standard range value of the difference value between the two pressure values can be preset, if the difference value measured in the front and back exceeds the standard range value, the cable sheath 1 has defects, and at the moment, the marking and the recording can be carried out manually.
In addition, a corresponding alarm can be designed according to the prior art, the standard range value is prestored in a storage unit of the controller, the controller is used for collecting the measured value of the pressure gauge or the pressure sensor, the measured value is compared with the standard range value after calculation, and when the measured value exceeds the marked range value, the controller is used for controlling the alarm to give an alarm. The collection of the pressure value and the calculation of the difference value can be realized by adopting the prior art, and are not described again.
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "disposed" are to be construed broadly, e.g. as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical features of the present invention which are not described in the above embodiments may be implemented by or using the prior art, and are not described herein again, of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions which may be made by those skilled in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.
Claims (6)
1. The device for detecting the sealing performance of the cable sheath is characterized by comprising a sealing cover (2) which can be sleeved on the outer side of a cable sheath (1) to be detected on a production line, wherein annular air bags (3) are respectively arranged at positions close to two ends in the sealing cover (2), the outer ring surface of each air bag (3) is hermetically connected with the inner wall of the sealing cover (2), and a closed space can be formed among the air bags (3) at the two ends, the sealing cover (2) and the sleeved cable sheath (1);
the sealing cover (2) is provided with a gas pipe and an exhaust pipe which are communicated with the closed space, the gas pipe is connected with a first air pump, valves are arranged on the gas pipe and the exhaust pipe, and the sealing cover (2) is provided with a pressure detection device (201) for detecting the air pressure in the closed space;
an air inlet pipe (301) and an air outlet pipe (302) are arranged on each air bag (3), valves are arranged on the air inlet pipe (301) and the air outlet pipe (302), and the air inlet pipes of all the air bags (3) extend out of the sealing cover (2) and are connected with a second air pump through a tee joint;
the sealing cover (2) is arranged on a rack (5) through a lifting mechanism (4), the lifting mechanism (4) can do reciprocating linear motion on the rack (5) along the advancing direction of the cable sheath (1), and the sealing cover (2) moves along with the cable sheath (1);
the lifting mechanism (4) comprises a sliding bottom plate (401) and a stud (402) rotatably arranged on the sliding bottom plate (401), guide rods (403) are symmetrically arranged on the sliding bottom plate (401) and positioned on two sides of the stud (402), a sleeve (205) with internal threads is fixedly arranged on the outer wall of the sealing cover (2), the sleeve (205) is arranged at the upper end of the stud (402) in a threaded connection mode, an ear plate (203) is arranged on the side wall of the sealing cover (2), the two guide rods (403) penetrate through the ear plate (203), and a hand wheel (404) for driving the stud (402) is arranged at the lower end of the stud (402);
the rack (5) comprises a base (501), sliding grooves (502) are symmetrically formed in two sides of the base (501), and two ends of the sliding bottom plate (401) are arranged in the sliding grooves (502) in a sliding mode;
the rack (5) further comprises support plates (504) arranged below two ends of the base (501), a screw rod (7) is rotatably arranged between the two support plates (504), the screw rod (7) is connected with the sliding bottom plate (401) through a driving assembly, and one end of the screw rod (7) extends out of the support plates (504) and is connected with a motor (701) with a speed reducer;
the driving assembly comprises a nut formed by splicing two semicircular rings (8) and external horizontal plates (801) arranged on the side walls of the two semicircular rings (8) on the same side, and springs (601) are arranged on the end faces of the two external horizontal plates (801) which are not adjacent;
a long opening (503) is formed in the side wall of the sliding groove (502), one end of the sliding bottom plate (401) extends out of the long opening (503), a vertical plate (6) is fixedly arranged below the extending end, a rectangular opening (604) is formed in the vertical plate (6), two external horizontal plates (801) are arranged in the rectangular opening (604) in a sliding mode and are arranged on the inner wall of the rectangular opening (604) through the springs (601), and the two semicircular rings (8) are spliced into the nut under the action of the two springs (601);
a limiting block (9) is arranged on the vertical plate (6) in a sliding manner and positioned on one side of the rectangular opening (604), a limiting groove (802) matched with the limiting block (9) is arranged on the adjacent end surface of the two external horizontal plates (801), and the limiting block (9) extends into the limiting groove (802) to separate the two external horizontal plates (801) from the two semicircular rings (8);
and ejector rods (505) matched with the limiting blocks (9) are arranged on the two supporting plates (504), one ejector rod (505) on one supporting plate (504) is used for ejecting the limiting blocks (9) into the limiting grooves (802), and the other ejector rod (505) on the supporting plate (504) is used for ejecting the limiting blocks (9) out of the limiting grooves (802).
2. The cable sheath sealability detection apparatus of claim 1, wherein at least two air bags (3) are provided at both ends of the sealing cover (2).
3. The cable sheath sealability detection apparatus of claim 1, wherein the sealing cover (2) is integrally formed.
4. The device for detecting the sealing performance of the cable sheath according to claim 1, wherein a fixing plate (602) is arranged on the vertical plate (6), a slide way (603) allowing the limiting block (9) to slide is arranged on the fixing plate (602), and the limiting block (9) is arranged in the slide way (603).
5. The device for detecting the sealing performance of the cable sheath according to claim 1, wherein position sensors are arranged at two ends of the limiting block (9) and used for acquiring the distance between the limiting block and an adjacent supporting plate (504), and electromagnetic valves are adopted for the valves.
6. A cable sheath sealing performance detection method of the cable sheath sealing performance detection apparatus according to any one of claims 1 to 5, characterized by specifically comprising:
sleeving the sealing cover (2) on the cable sheath (1), inflating the air bag (3) through the air pump II to enable the air bag (3) at two ends, the sealing cover (2) and the sleeved cable sheath (1) to form a closed space, and quickly filling gas with a certain pressure into the sealing cover (2) through the air pump I;
after the sealing cover (2) travels a fixed distance along with the cable sheath (1), whether the cable sheath at the section has defects is judged according to the change of the pressure value in the sealing cover (2) within a certain time.
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| CN117006247B (en) * | 2023-09-28 | 2023-12-19 | 江苏亨通高压海缆有限公司 | Cable corrugated aluminum sheath air tightness test device and preparation method thereof |
| CN118130010B (en) * | 2024-05-08 | 2024-07-12 | 四川川钨硬质合金有限公司 | Sealing performance detection device for sealing ring |
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Denomination of invention: A device and method for detecting the sealing performance of cable sheaths Effective date of registration: 20230907 Granted publication date: 20220621 Pledgee: Qi quotient bank Limited by Share Ltd. Weihai Wendeng branch Pledgor: SHANDONG KUNYU CABLE Co.,Ltd. Registration number: Y2023980055706 |