A sealing structure and water permeability test device

Abstract

The present invention discloses a sealing structure and a water permeability test device, which belongs to the field of cable testing technology. The sealing structure includes a fixed ring, a movable ring, an elastic sleeve and a flexible strip. The movable ring is rotatably connected to the fixed ring and is coaxially arranged with the fixed ring; the elastic sleeve is inserted into the fixed ring and the movable ring, and the elastic sleeve is used to be sleeved outside the cable; a plurality of flexible strips are arranged along the circumference of the fixed ring, and the fixed ring and the movable ring are both connected to the flexible strip. Rotating the movable ring can tighten the flexible strip, and make the periphery of the flexible strip squeeze the outer peripheral side wall of the elastic sleeve. The outer peripheral side wall of the elastic sleeve is squeezed by the flexible strip to form a seal between the inner peripheral side wall of the elastic sleeve and the periphery of the cable, that is, the inner peripheral side wall of the elastic sleeve fits the periphery of the cable. The sealing structure provided by the present invention is convenient for disassembly and assembly with the cable, and the sealing is stable and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of cable testing, and in particular to a sealing structure and a water permeability testing device. Background Art

[0002] In power transmission and communication networks, cables are key infrastructures, and their performance stability and reliability are crucial. The longitudinal water blocking performance of cables is one of the important indicators to measure their waterproof performance, which is of great significance to ensure the normal operation of cables in humid or underwater environments.

[0003] In the related art, the water permeability test device usually includes a tank body, and installation holes are provided on both sides of the tank body for the cables to pass through. In order to prevent the liquid in the tank body from flowing out between the installation holes and the cables, a clamp and a sealing ring are usually provided at the installation holes. The cable passes through the sealing ring and is pressed by the clamp to prevent leakage. However, if the clamp does not press the sealing ring evenly, leakage will occur, and the cable disassembly and assembly is very inconvenient. Summary of the invention

[0004] An object of the present invention is to provide a sealing structure that is convenient for assembly and disassembly with cables and has stable and reliable sealing.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A sealing structure is provided, comprising:

[0007] Fixed ring;

[0008] A movable ring, rotatably connected to the fixed ring and coaxially arranged with the fixed ring;

[0009] An elastic sleeve is inserted into the fixed ring and the movable ring, and is used to be sleeved outside the cable;

[0010] A plurality of flexible strips are arranged along the circumference of the fixed ring, and the fixed ring and the movable ring are both connected to the flexible strips;

[0011] Among them, rotating the movable ring can tighten the flexible strip and make the periphery of the flexible strip squeeze the outer peripheral side wall of the elastic sleeve. The outer peripheral side wall of the elastic sleeve is squeezed by the flexible strip to form a seal between the inner peripheral side wall of the elastic sleeve and the periphery of the cable.

[0012] Optionally, the movable ring is provided with one, the first end of the flexible strip is connected to the fixed ring, and the second end of the flexible strip is connected to the movable ring.

[0013] Optionally, a plurality of pulleys are provided at intervals along the circumferential direction on the first surface of the fixing ring, and the pulleys are provided in one-to-one correspondence with the flexible strips;

[0014] The movable ring comprises an outer movable ring and an inner movable ring, wherein the outer movable ring is sleeved outside the outer ring of the fixed ring, and the inner movable ring is inserted into the inner ring of the fixed ring, and a transmission assembly is arranged between the outer movable ring and the inner movable ring, and the rotation of one of the outer movable ring and the inner movable ring can drive the other to rotate in the opposite direction through the transmission assembly;

[0015] Wherein, the flexible strip is wound around the corresponding pulley, and the first end of the flexible strip is connected to the outer moving ring, and the second end of the flexible strip is connected to the inner moving ring.

[0016] Optionally, the first end of the flexible strip is connected to the first surface of the outer moving ring, and the second end of the flexible strip is connected to the first surface of the inner moving ring;

[0017] Wherein, the first surface of the outer moving ring protrudes from the first surface of the fixed ring, and the first surface of the fixed ring protrudes from the first surface of the inner moving ring.

[0018] Optionally, the transmission assembly includes a plurality of gear sets spaced around the fixing ring, the gear set including a rotating shaft rotatably arranged on the fixing ring, and a first gear and a second gear fixed on the rotating shaft;

[0019] An inner ring side wall of the outer moving ring is provided with an inner gear ring, and the inner gear ring is meshed with the first gear;

[0020] An outer ring gear is provided on the outer ring side wall of the inner moving ring, and the outer ring gear is meshed with the second gear.

[0021] Optionally, a transmission ratio between the inner gear ring and the first gear is equal to a transmission ratio between the outer gear ring and the second gear.

[0022] Optionally, the sealing structure further includes:

[0023] A locking member, slidably connected to the fixing ring and sliding relative to the fixing ring between a first position and a second position;

[0024] an elastic member connected to the locking member, wherein the elastic member causes the locking member to have a tendency to slide from the second position to the first position;

[0025] In the first position, the locking member extends between two adjacent gear teeth of the outer gear ring;

[0026] In the second position, the locking member is separated from the outer gear ring.

[0027] Optionally, the locking member comprises a locking end, and the locking end comprises an inclined surface and an involute surface disposed opposite to each other;

[0028] In the first position, the locking end extends between two adjacent gear teeth of the outer gear ring, and the involute surface abuts against one of the two gear teeth to limit the inner moving ring from rotating in the opposite direction of tightening the flexible strip;

[0029] When the inner movable ring rotates in a direction to tighten the flexible strip, the other of the two gear teeth can push the inclined surface to make the locking element slide from the first position to the second position.

[0030] Optionally, the movable ring is connected to a driving assembly, and the driving assembly is used to drive the movable ring to rotate.

[0031] Optionally, the driving assembly comprises:

[0032] A driving gear, rotatably disposed on the fixing ring;

[0033] A driving member connected to the driving gear, the driving member being used to drive the driving gear to rotate;

[0034] The driven gear ring is arranged on the movable ring, and the driven gear ring is meshed with the driving gear.

[0035] Optionally, the flexible strip is configured as a flat structure, and a groove is provided on a side of the flexible strip facing the elastic sleeve.

[0036] Another object of the present invention is to provide a water permeability test device, comprising:

[0037] A tank body, wherein mounting holes are provided on two opposite sides of the tank body;

[0038] The two sealing structures described in any one of the above are arranged in one-to-one correspondence with the mounting holes, the sealing structure is arranged on the tank body, and the elastic sleeve of the sealing structure is connected to the corresponding mounting hole.

[0039] Beneficial effects: The sealing structure provided by the present invention allows the cable to be inserted into the elastic sleeve, and the movable ring is rotated to tighten the flexible strip, so that the circumference of the flexible strip is pressed against the outer peripheral wall of the elastic sleeve, and the elastic sleeve is squeezed by a plurality of flexible strips arranged along the circumference of the fixed ring, so that the inner peripheral side wall of the elastic sleeve can be evenly pressed against the cable and form a seal with the cable, which is stable and reliable, and convenient for cable installation and sealing. In addition, by reversing the movable ring, the elastic sleeve can be separated from the compression of the flexible strip, and the cable can be pulled out of the elastic sleeve, which is convenient for the detachment of the cable.

[0040] The water permeability test device provided by the present invention facilitates the disassembly and assembly of the cable by setting the sealing structure, and the seal between the sealing structure and the cable is stable and reliable, effectively preventing leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the sealing structure provided by the present invention;

[0042] Figure 2 is a partial cross-sectional view of the sealing structure provided by the present invention;

[0043] Figure 3 It is a schematic diagram of the partial structure of the sealing structure provided by the present invention at the locking member;

[0044] Figure 4 is a cross-sectional schematic diagram of the flexible strip provided by the present invention;

[0045] Figure 5 It is a structural schematic diagram of the water permeability test device provided by the present invention.

[0046] In the figure:

[0047] 100, fixing ring; 110, pulley; 120, bracket;

[0048] 200, movable ring; 201, outer movable ring; 202, inner movable ring; 210, inner gear ring; 220, outer gear ring; 221, gear teeth;

[0049] 300, elastic sleeve;

[0050] 400, flexible strip; 410, strip segment; 420, groove;

[0051] 500, gear set; 510, rotating shaft; 520, first gear; 530, second gear;

[0052] 600, driving assembly; 610, driving gear; 620, driving member; 621, connecting shaft; 630, driven gear ring;

[0053] 710, locking member; 711, locking end; 7111, inclined surface; 7112, involute surface; 720, elastic member;

[0054] 810, tank body; 820, sealing structure; 830, liquid injection pipe; 831, liquid inlet valve; 840, exhaust pipe; 841, exhaust valve; 850, water tank. DETAILED DESCRIPTION

[0055] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0056] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0058] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0059] Reference Figure 1 As shown, this embodiment provides a sealing structure, which includes a fixed ring 100 , a movable ring 200 , an elastic sleeve 300 and a flexible strip 400 .

[0060] Specifically, the movable ring 200 is rotatably connected to the fixed ring 100 and is coaxially arranged with the fixed ring 100; the elastic sleeve 300 is inserted into the fixed ring 100 and the movable ring 200, and the elastic sleeve 300 is used to be sleeved outside the cable; a plurality of flexible strips 400 are arranged along the circumference of the fixed ring 100, and the fixed ring 100 and the movable ring 200 are both connected to the flexible strips 400. Rotating the movable ring 200 can tighten the flexible strip 400, and make the circumference of the flexible strip 400 squeeze the outer peripheral side wall of the elastic sleeve 300, and the outer peripheral side wall of the elastic sleeve 300 is squeezed by the flexible strip 400, so that the inner peripheral side wall of the elastic sleeve 300 and the circumference of the cable are sealed, that is, the inner peripheral side wall of the elastic sleeve 300 fits the circumference of the cable.

[0061] In this embodiment, the cable is inserted into the elastic sleeve 300, and the movable ring 200 is rotated to tighten the flexible strip 400, so that the circumference of the flexible strip 400 squeezes the outer peripheral wall of the elastic sleeve 300, and the elastic sleeve 300 is squeezed by multiple flexible strips 400 arranged along the circumference of the fixed ring 100, so that the inner peripheral side wall of the elastic sleeve 300 is evenly pressed on the cable and forms a seal with the cable, which is stable and reliable, and convenient for cable installation and sealing. In addition, by reversing the movable ring 200, the elastic sleeve 300 can be separated from the compression of the flexible strip 400, and the cable can be pulled out of the elastic sleeve 300, which is convenient for the detachment of the cable.

[0062] In this embodiment, the elastic sleeve 300 can fit tightly to cables of different diameters under the compression of multiple flexible strips 400 arranged circumferentially along the fixing ring 100, that is, the sealing structure is suitable for cables of different sizes. Compared with the method of replacing sealing rings of different sizes to adapt to cables of different sizes in the prior art, it effectively reduces costs and has better versatility and flexibility.

[0063] Exemplarily, the fixed ring 100 and the movable ring 200 are coaxially arranged.

[0064] In some embodiments, the movable ring 200 is provided with a first end of the flexible strip 400 connected to the fixed ring 100, and a second end of the flexible strip 400 connected to the movable ring 200, which has a simple structure and facilitates the assembly of the sealing structure.

[0065] Exemplarily, the movable ring 200 is sleeved outside the outer ring of the fixed ring 100, or the movable ring 200 is inserted into the inner ring of the fixed ring 100, and the same end of the movable ring 200 and the fixed ring 100 is connected to the flexible strip 400 for easy assembly.

[0066] In some embodiments, reference Figure 1 and Figure 2As shown, the first surface of the fixed ring 100 is provided with a plurality of pulleys 110 at intervals along the circumferential direction, and the pulleys 110 are arranged one by one with the flexible strips 400; the movable ring 200 includes an outer movable ring 201 and an inner movable ring 202, the outer movable ring 201 is sleeved outside the outer ring of the fixed ring 100, and the inner movable ring 202 is inserted into the inner ring of the fixed ring 100, and a transmission assembly is provided between the outer movable ring 201 and the inner movable ring 202, and the rotation of one of the outer movable ring 201 and the inner movable ring 202 can drive the other to rotate in the opposite direction through the transmission assembly. Among them, the flexible strip 400 is wound around the corresponding pulley 110, and the first end of the flexible strip 400 is connected to the outer movable ring 201, and the second end of the flexible strip 400 is connected to the inner movable ring 202. It can be understood that the flexible strip 400 is divided into two strip segments 410 at the pulley 110, and the elastic sleeve 300 is located between the two strip segments 410, one of the two strip segments 410 is connected to the outer movable ring 201, and the other is connected to the inner movable ring 202. In this embodiment, under the transmission of the transmission assembly, the outer movable ring 201 and the inner movable ring 202 rotate in opposite directions, which can pull the two ends of the flexible strip 400, so that the two strip segments 410 respectively squeeze the elastic sleeve 300, that is, one flexible strip 400 can squeeze the two positions of the elastic sleeve 300, so that the seal between the elastic sleeve 300 and the cable is more stable and reliable. In addition, the flexible strip 400 can bypass the pulley 110 more smoothly during the tensioning process, which can reduce friction, effectively reduce the wear of the flexible strip 400, and extend its service life. It can also ensure that the flexible strip 400 is more stable and uniform when tightened, and improve the stability and reliability of the sealing effect.

[0067] It can be understood that the first surface and the second surface of the fixed ring 100 are two end surfaces opposite to each other along its own axis direction, and the first surface and the second surface of the movable ring 200 are two end surfaces opposite to each other along its own axis direction, and the first surface of the fixed ring 100 and the first surface of the movable ring 200 have the same orientation.

[0068] In a feasible implementation, the first end of the flexible strip 400 is connected to the first surface of the outer movable ring 201, and the second end of the flexible strip 400 is connected to the first surface of the inner movable ring 202. The first surface of the outer movable ring 201 protrudes from the first surface of the fixed ring 100, and the first surface of the fixed ring 100 protrudes from the first surface of the inner movable ring 202. In this embodiment, steps that are concave from the outside to the inside are formed between the first surface of the outer movable ring 201, the first surface of the fixed ring 100, and the first surface of the inner movable ring 202. When the flexible strips 400 are tightened, layers are formed between the flexible strips 400, that is, multiple flexible strips 400 arranged along the circumference of the fixed ring 100 are arranged in a spiral shape, which effectively prevents position interference between the flexible strips 400.

[0069] In a feasible implementation, the first end of the elastic sleeve 300 can be connected to the second surface of the fixed ring 100. When the movable ring 200 is provided with one, the second end of the elastic sleeve 300 passes through the inner ring of the fixed ring 100 or the inner ring of the movable ring 200. When the movable ring 200 includes an outer movable ring 201 and an inner movable ring 202, the second end of the elastic sleeve 300 passes through the inner ring of the inner movable ring 202. In this embodiment, the first end of the elastic sleeve 300 is turned outward and connected to the second surface of the fixed ring 100 to ensure that the elastic member 720 can be coaxially arranged with the fixed ring 100. Among them, the first end of the elastic sleeve 300 can be trumpet-shaped.

[0070] In this embodiment, refer to Figure 2 As shown, the transmission assembly includes a plurality of gear sets 500 arranged at intervals around the fixed ring 100, and the gear set 500 includes a rotating shaft 510 rotatably arranged on the fixed ring 100, and a first gear 520 and a second gear 530 fixed on the rotating shaft 510; an inner gear ring 210 is provided on the inner ring side wall of the outer moving ring 201, and the inner gear ring 210 is meshed with the first gear 520; an outer gear ring 220 is provided on the outer ring side wall of the inner moving ring 202, and the outer gear ring 220 is meshed with the second gear 530. In this embodiment, when the outer moving ring 201 is rotated, the first gear 520 and the second gear 530 can be driven to rotate in the same direction under the meshing transmission of the inner gear ring 210 and the first gear 520, and the inner moving ring 202 can be driven to rotate in the opposite direction of the outer moving ring 201 under the meshing transmission of the outer gear ring 220 and the second gear 530, and the structure is simple, and the transmission is stable and reliable.

[0071] Exemplarily, the outer dynamic ring 201 and the inner gear ring 210 may be integrally formed or separately provided, which is not limited in the present application.

[0072] Exemplarily, the inner dynamic ring 202 and the outer gear ring 220 may be integrally formed or separately provided, which is not limited in the present application.

[0073] In a feasible embodiment, the transmission ratio between the inner gear ring 210 and the first gear 520 is equal to the transmission ratio between the outer gear ring 220 and the second gear 530, so that the outer moving ring 201 and the inner moving ring 202 can rotate at the same angle, so that the flexible strip 400 can squeeze the elastic sleeve 300 more evenly, and the inner peripheral side wall of the elastic sleeve 300 can be more evenly pressed against the cable to ensure that a good seal is formed between the elastic sleeve 300 and the cable, avoiding the problem of sealing failure caused by unequal rotation angles of the outer moving ring 201 and the inner moving ring 202.

[0074] In this embodiment, the transmission assembly may also be a worm gear transmission structure or other transmission structure, which is not limited in this application.

[0075] In this embodiment, refer to Figure 1 and Figure 3 As shown, the sealing structure further includes a locking member 710 and an elastic member 720. The locking member 710 is slidably connected to the fixing ring 100 and slides between a first position and a second position relative to the fixing ring 100; the elastic member 720 is connected to the locking member 710, and the elastic member 720 enables the locking member 710 to have a tendency to slide from the second position to the first position. Among them, in the first position, the locking piece 710 extends between two adjacent gear teeth 221 of the outer gear ring 220. Under the action of the elastic piece 720, the locking piece 710 can limit the outer gear ring 220 to rotate in the opposite direction of the tightening flexible strip 400, effectively preventing the flexible strip 400 from loosening, and ensuring that the elastic sleeve 300 forms a stable and reliable seal with the periphery of the cable under the extrusion of the tightened flexible strip 400; in the second position, the locking piece 710 is separated from the outer gear ring 220, that is, the inner movable ring 202 can rotate in the opposite direction of the tightening flexible strip 400 to relax the flexible strip 400, so as to facilitate the cable to be pulled out of the elastic sleeve 300.

[0076] Specifically, a bracket 120 is disposed on the fixing ring 100 , the locking member 710 is slidably disposed on the bracket 120 , and the elastic member 720 is disposed between the locking member 710 and the bracket 120 .

[0077] Exemplarily, the elastic member 720 may be a spring, and the elastic member 720 may be sleeved on the locking member 710 .

[0078] In a feasible embodiment, the locking member 710 includes a locking end 711, and the locking end 711 includes an inclined surface 7111 and an involute surface 7112 disposed opposite to each other. In the first position, the locking end 711 extends between two adjacent gear teeth 221 of the outer gear ring 220, and the involute surface 7112 abuts against one of the two gear teeth 221 to limit the inner moving ring 202 from rotating in the opposite direction of the tensioned flexible strip 400, so as to ensure that the elastic sleeve 300 forms a stable and reliable seal with the peripheral portion of the cable under the extrusion of the tensioned flexible strip 400.

[0079] When the inner moving ring 202 rotates in the direction of tightening the flexible strip 400, the other of the two gear teeth 221 can push the inclined surface 7111, so that the locking member 710 slides from the first position to the second position. It can be understood that when the inner moving ring 202 rotates in the direction of tightening the flexible strip 400, the locking member 710 will not limit the rotation of the inner moving ring 202, which is convenient for the installation and sealing of the cable; when the cable needs to be detached, the locking member 710 can be kept in the second position, so that the inner moving ring 202 can rotate in the opposite direction of tightening the flexible strip 400, which is convenient for operation.

[0080] In this embodiment, refer to Figure 1 and Figure 3As shown, the movable ring 200 is connected to a driving assembly 600 , and the driving assembly 600 is used to drive the movable ring 200 to rotate, so as to facilitate the rotation of the movable ring 200 .

[0081] Specifically, the driving assembly 600 includes a driving gear 610, a driving member 620 and a driven ring gear 630. The driving gear 610 is rotatably arranged on the fixed ring 100; the driving member 620 is connected to the driving gear 610, and the driving member 620 is used to drive the driving gear 610 to rotate; the driven ring gear 630 is arranged on the movable ring 200, and the driven ring gear 630 is meshed with the driving gear 610. In this embodiment, the driving gear 610 is driven to rotate by the driving member 620, and the movable ring 200 is driven to rotate under the meshing transmission of the driving gear 610 and the driven ring gear 630, which is convenient for operation, and the structure of the driving assembly 600 is stable and reliable.

[0082] Specifically, the driven ring gear 630 may be disposed on the second surface of the outer dynamic ring 201 or the second surface of the inner dynamic ring 202 .

[0083] Exemplarily, the driving gear 610 and the driven gear ring 630 may be bevel gears, and the axial direction of the driving gear 610 and the axial direction of the fixing ring 100 are perpendicular to each other.

[0084] Exemplarily, the driving member 620 includes but is not limited to a hand-cranked wheel or a motor. Figure 2 As shown, the driving gear 610 can be rotatably disposed on the fixing ring 100 via a connecting shaft 621 of a hand-cranked wheel.

[0085] Exemplarily, the driving assembly 600 is disposed at an end of the fixing ring 100 away from the pulley 110 .

[0086] In this embodiment, the driving gear 610 and the driven ring gear 630 can be replaced by transmission structures such as a worm gear, a chain sprocket, a synchronous belt, etc., which is not limited in this application.

[0087] In this embodiment, refer to Figure 1 and Figure 4As shown, the flexible strip 400 can be set to a flat structure, for example, the cross-sectional shape of the flexible strip 400 is waist-shaped. When the flexible strip 400 is tightened, the force distribution of the flexible strip 400 on the elastic sleeve 300 is more uniform, the seal formed between the elastic sleeve 300 and the cable is more stable and reliable, and the elastic sleeve 300 is effectively prevented from having the problem of excessive stress concentration. Exemplarily, a groove 420 is provided on the side of the flexible strip 400 facing the elastic sleeve 300, which can increase the deformation ability of the flexible strip 400 when subjected to force, so as to more flexibly adapt to the deformation requirements, and improve the flexibility and service life of the flexible strip 400. In addition, the groove 420 can accommodate the deformation of part of the elastic sleeve 300 after being compressed. When a plurality of flexible strips 400 arranged along the circumference of the fixing ring 100 are arranged in a spiral shape, the flexible strip 400 still has space for deformation.

[0088] Exemplarily, the elastic sleeve 300 may be made of rubber.

[0089] In this embodiment, the movable ring 200 includes at least one outer movable ring 201 and at least one inner movable ring 202. When the movable ring 200 includes at least two outer movable rings 201 and at least two inner movable rings 202, all the outer movable rings 201, the fixed ring 100 and all the inner movable rings 202 are sequentially arranged. Among them, a first transmission assembly is provided between two adjacent outer movable rings 201, and a second transmission assembly is provided between two adjacent inner movable rings 202. In this embodiment, the rotation of one of the two adjacent outer movable rings 201 can drive the other to rotate in the opposite direction through the first transmission assembly; the rotation of one of the two adjacent inner movable rings 202 can drive the other to rotate in the opposite direction through the second transmission assembly. In addition, the outer movable ring 201 and the inner movable ring 202 adjacent to the fixed ring 100 rotate in opposite directions under the transmission of the transmission assembly.

[0090] Specifically, the first end of the flexible strip 400 is connected to the first surface of one of the outer moving rings 201, and the second end of the flexible strip 400 is connected to the first surface of one of the inner moving rings 202, and the outer moving ring 201 and the inner moving ring 202 connected to the flexible strip 400 rotate in opposite directions. In this embodiment, flexible strips 400 of different lengths are connected to corresponding outer moving rings 201 and inner moving rings 202 to improve applicability.

[0091] Exemplarily, the structures of the first transmission assembly and the second transmission assembly are the same or similar to the transmission assembly, and are not described in detail in this embodiment.

[0092] Reference Figures 1 to 5As shown, this embodiment also provides a water permeability test device, which includes a tank body 810 and the two sealing structures 820 mentioned above. Among them, mounting holes are provided on opposite sides of the tank body 810, and the sealing structures 820 are arranged one by one corresponding to the mounting holes. The sealing structure 820 is arranged on the tank body 810, and the elastic sleeve 300 of the sealing structure 820 is connected to the corresponding mounting hole. Among them, the fixing ring 100 of the sealing structure 820 is connected to the tank body 810. Exemplarily, during the water permeability test of the cable, there is a height difference between the liquid level in the tank body 810 and the cable, which generates water pressure on the cable, thereby testing the longitudinal water blocking performance of the cable. In this embodiment, the setting of the sealing structure 820 facilitates the disassembly and assembly of the cable, and the sealing between the sealing structure 820 and the cable is stable and reliable, which effectively prevents leakage.

[0093] Exemplarily, the second surface of the fixing ring 100 of the sealing structure 820 faces the tank body 810. In this embodiment, the first end of the elastic sleeve 300 is connected to the second surface of the fixing ring 100, and the fixing ring 100 can press the elastic sleeve 300 onto the tank body 810 to form a seal between the first end of the elastic sleeve 300 and the end of the mounting hole.

[0094] Specifically, the water permeability test device further includes a liquid injection pipe 830 and an exhaust pipe 840 connected to the top of the tank body 810, the liquid injection pipe 830 is provided with a liquid inlet valve 831, and the exhaust pipe 840 is provided with an exhaust valve 841. In this embodiment, after the cable is installed and sealed, the liquid inlet valve 831 and the exhaust valve 841 are opened, the liquid is injected into the tank body 810 through the liquid injection pipe 830, and the gas in the tank body 810 is discharged through the exhaust pipe 840, which is convenient for operation.

[0095] More specifically, a water tank 850 is provided above the tank body 810 , and the water tank 850 is connected to the exhaust pipe 840 . When the liquid inlet valve 831 and the exhaust valve 841 are opened, the liquid in the water tank 850 will flow into the tank body 810 through the liquid injection pipe 830 .

[0096] In this embodiment, the method of using the water permeability test device specifically includes the following steps: first, pass the cable through the two mounting holes and the two elastic sleeves 300; then, control the drive assembly 600 to drive the movable ring 200 to rotate, so that the elastic sleeve 300 forms a seal with the periphery of the cable under the squeezing of the flexible strip 400; finally, open the liquid inlet valve 831 and the exhaust valve 841 to inject the liquid in the water tank 850 into the tank body 810.

[0097] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A sealing structure, characterized in that: include: Fixing ring (100); A movable ring (200) is rotatably connected to the fixed ring (100) and is coaxially arranged with the fixed ring (100); An elastic sleeve (300) is inserted into the fixed ring (100) and the movable ring (200), and the elastic sleeve (300) is used to be sleeved outside the cable; A plurality of flexible strips (400) are arranged along the circumference of the fixed ring (100), and both the fixed ring (100) and the movable ring (200) are connected to the flexible strips (400); The first surface of the fixed ring (100) is provided with a plurality of pulleys (110) at intervals along the circumferential direction, the pulleys (110) are arranged in one-to-one correspondence with the flexible strips (400), the movable ring (200) comprises an outer movable ring (201) and an inner movable ring (202), the flexible strips (400) are wound around the corresponding pulleys (110), and the first end of the flexible strips (400) is connected to the outer movable ring (201), and the second end of the flexible strips (400) is connected to the inner movable ring (202); Rotating the movable ring (200) can tighten the flexible strip (400) and cause the periphery of the flexible strip (400) to press against the outer peripheral side wall of the elastic sleeve (300); the outer peripheral side wall of the elastic sleeve (300) is pressed by the flexible strip (400) so that a seal is formed between the inner peripheral side wall of the elastic sleeve (300) and the periphery of the cable.

2. The sealing structure according to claim 1, characterized in that: The movable ring (200) is provided with a first end of the flexible strip (400) connected to the fixed ring (100), and a second end of the flexible strip (400) connected to the movable ring (200).

3. The sealing structure according to claim 1, characterized in that: The outer moving ring (201) is sleeved outside the outer ring of the fixed ring (100), and the inner moving ring (202) is inserted into the inner ring of the fixed ring (100). A transmission component is provided between the outer moving ring (201) and the inner moving ring (202), and the rotation of one of the outer moving ring (201) and the inner moving ring (202) can drive the other to rotate in the opposite direction through the transmission component.

4. The sealing structure according to claim 3, characterized in that: The first end of the flexible strip (400) is connected to the first surface of the outer moving ring (201), and the second end of the flexible strip (400) is connected to the first surface of the inner moving ring (202); Wherein, the first surface of the outer moving ring (201) protrudes from the first surface of the fixing ring (100), and the first surface of the fixing ring (100) protrudes from the first surface of the inner moving ring (202).

5. The sealing structure according to claim 3, characterized in that: The transmission assembly comprises a plurality of gear sets (500) arranged at intervals around the fixing ring (100), the gear set (500) comprising a rotating shaft (510) rotatably arranged on the fixing ring (100), and a first gear (520) and a second gear (530) fixed on the rotating shaft (510); An inner ring side wall of the outer moving ring (201) is provided with an inner gear ring (210), and the inner gear ring (210) is meshed with the first gear (520); An outer ring gear (220) is provided on the outer ring side wall of the inner moving ring (202), and the outer ring gear (220) is meshed with the second gear (530).

6. The sealing structure according to claim 5, characterized in that: The transmission ratio between the inner gear ring (210) and the first gear (520) is equal to the transmission ratio between the outer gear ring (220) and the second gear (530).

7. The sealing structure according to claim 5, characterized in that: Also includes: A locking member (710) is slidably connected to the fixing ring (100) and slides relative to the fixing ring (100) between a first position and a second position; an elastic member (720) connected to the locking member (710), the elastic member (720) causing the locking member (710) to have a tendency to slide from the second position to the first position; In the first position, the locking member (710) extends between two adjacent gear teeth (221) of the outer gear ring (220); In the second position, the locking member (710) is separated from the outer gear ring (220).

8. The sealing structure according to claim 7, characterized in that: The locking member (710) comprises a locking end (711), and the locking end (711) comprises an inclined surface (7111) and an involute surface (7112) disposed opposite to each other; In the first position, the locking end (711) extends between two adjacent gear teeth (221) of the outer gear ring (220), and the involute surface (7112) abuts against one of the two gear teeth (221) to limit the inner moving ring (202) from rotating in the opposite direction of tightening the flexible strip (400); When the inner movable ring (202) rotates in a direction to tighten the flexible strip (400), the other of the two gear teeth (221) can push against the inclined surface (7111) to allow the locking member (710) to slide from the first position to the second position.

9. The sealing structure according to claim 1, characterized in that: The movable ring (200) is connected to a driving assembly (600), and the driving assembly (600) is used to drive the movable ring (200) to rotate.

10. The sealing structure according to claim 9, characterized in that: The driving assembly (600) comprises: A driving gear (610) rotatably mounted on the fixing ring (100); A driving member (620) connected to the driving gear (610), the driving member (620) being used to drive the driving gear (610) to rotate; The driven gear ring (630) is arranged on the movable ring (200), and the driven gear ring (630) is meshed with the driving gear (610).

11. The sealing structure according to claim 1, characterized in that: The flexible strip (400) is configured as a flat structure, and a groove (420) is provided on a side of the flexible strip (400) facing the elastic sleeve (300).

12. A water permeability test device, characterized in that: include: A tank body (810), wherein mounting holes are provided on two opposite sides of the tank body (810); Two sealing structures (820) according to any one of claims 1 to 11 are arranged in one-to-one correspondence with the mounting holes, the sealing structures (820) are arranged on the tank body (810), and the elastic sleeves (300) of the sealing structures (820) are arranged in communication with the corresponding mounting holes.

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