High pressure resistant sealed connector
Patent Information
- Application Number
- CN202611487291.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-23
- Publication Date
- 2026-10-27
AI Technical Summary
[0004]针对现有技术的不足，本发明提供了一种耐高压密封连接器，解决了现有外置皮囊式连接器易受井液侵蚀、杂质卡滞阻碍皮囊复位、整体径向尺寸过大难以适配井下环境的问题
[0041]本申请将弹性皮囊设于连接器内部，其内周壁与电缆之间填充的是绝缘脂，而外部高压井液仅通过电缆与插入孔的间隙流入第二壳体内推动支撑件，并不直接接触弹性皮囊，因此，弹性皮囊与外界井液完全隔离，避免了井液的化学腐蚀和固体颗粒冲刷，大幅延长了皮囊的使用寿命。此外，外界水流仅通过电缆与插入孔之间的间隙流入第二壳体，该间隙尺寸极小，能有效阻挡泥沙颗粒等杂质进入，避免了杂质卡滞在支撑件与第二壳体之间的风险，因此，弹性皮囊能够顺畅地轴向压缩和复位，确保压力补偿功能长期可靠。并且，本申请将活动皮囊组件的弹性皮囊布置在电缆的外侧且沿电缆的轴向方向伸缩，即弹性皮囊沿轴向折叠或伸展，相比于将弹性皮囊布置待补偿腔体的径向外侧，这种轴向布局极大地减小了连接器的径向尺寸，使其整体呈细长形，能够轻松适配井下狭小孔道的装配要求。
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Figure CN122992374A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of connector technology, and in particular to a high-pressure resistant sealed connector. Background Technology
[0002] Downhole measuring instruments are required to operate in ultra-high pressure environments for extended periods during oil exploration. These instruments primarily rely on high-pressure resistant sealed connectors to maintain a stable electrical connection with surface equipment. Downhole hydrostatic pressure is extremely high, and conventional sealing structures, which rely on static seals to block external pressure, are prone to deformation at the sealing interface under ultra-high pressure conditions. Intrusion of external high-pressure fluids can easily cause short circuits and failures in the instrument's internal circuitry.
[0003] Currently, in commonly used high-pressure resistant sealed connectors, the elastic bladder is mainly arranged on the radial outer side of the cavity to be compensated, and the outer shell has a through hole to allow external well fluid to flow in. Pressure compensation is achieved by directly squeezing the elastic bladder with external water pressure. This structure has the following shortcomings: First, the external well fluid is in direct contact with the elastic bladder, and the corrosion and scouring effects will shorten the bladder's service life; second, the well fluid contains impurities such as mud and sand particles, which enter the outer shell with the water flow and become stuck in the gap between the bladder and the outer shell, hindering the normal expansion and reset of the bladder; third, the radial distribution of the bladder results in an overall large radial dimension of the connector, which cannot meet the assembly requirements of the downhole environment for slender structures. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides a high-pressure resistant sealing connector, which solves the problems of existing external bladder connectors being susceptible to well fluid corrosion, impurities causing blockages that hinder bladder repositioning, and excessively large overall radial dimensions that make them difficult to adapt to downhole environments.
[0005] This invention is achieved through the following technical solution:
[0006] A high-pressure resistant sealed connector, comprising:
[0007] A conductive component, the conductive component including a housing and a conductive core disposed within the housing;
[0008] A first housing is connected to one end of the outer shell, and a cavity is provided inside the first housing, with the wiring terminal of the conductive core located inside the cavity;
[0009] A second housing is connected to the end of the first housing away from the outer shell, and the end of the second housing away from the first housing is provided with an insertion hole;
[0010] A cable extends into the second housing through the insertion hole, and a gap is formed between the outer peripheral wall of the cable and the inner peripheral wall of the insertion hole to allow external water to flow in. At least part of the cable core is located in the cavity and is electrically connected to the terminal of the conductive core.
[0011] A movable bladder assembly includes an elastic bladder and a support member connected to the elastic bladder. The elastic bladder is sleeved on the outside of the cable, and insulating grease is filled between the inner peripheral wall of the elastic bladder and the outer peripheral wall of the cable. The end of the elastic bladder away from the support member is sealed and connected between the first housing and the second housing. The support member is sealed and connected between the inner peripheral wall of the second housing and the outer peripheral wall of the cable and can slide along the axial direction of the cable.
[0012] When the high-pressure resistant sealing connector is in a high-pressure environment, external water flows through the gap between the outer peripheral wall of the cable and the inner peripheral wall of the insertion hole into the second housing and pushes the support member to move towards the first housing. This, in turn, pushes the insulating grease between the inner peripheral wall of the elastic bladder and the outer peripheral wall of the cable to fill the cavity of the first housing and the internal gap of the cable.
[0013] Furthermore, the elastic bladder is integrally formed and connected to the support member through a vulcanization process;
[0014] The outer peripheral wall of the support member is recessed to form an external vulcanization groove, and the end of the elastic bladder near the support member is at least partially embedded in the external vulcanization groove; and / or,
[0015] The inner peripheral wall of the support member is recessed to form an inner vulcanization groove, and the end of the elastic bladder near the support member is at least partially embedded in the inner vulcanization groove.
[0016] Furthermore, the elastic bladder includes a corrugated telescopic portion, a first connecting portion connected to one end of the telescopic portion, and a second connecting portion connected to the other end of the telescopic portion.
[0017] The inner peripheral wall of the first connecting part is recessed to form a first sealing groove, and the outer peripheral wall of the first housing is protruding to form a first protrusion that is interference-fitted with the first sealing groove.
[0018] The second connecting portion is at least partially connected to the inner peripheral wall of the support member, and the inner peripheral wall of the second connecting portion protrudes to form a second protrusion, the second protrusion being interference-fitted with the outer peripheral wall of the cable.
[0019] Furthermore, the outer peripheral wall of the support member is recessed to form a receiving groove, and a first sealing ring is embedded in the receiving groove. The first sealing ring is in sealing fit with the inner peripheral wall of the second housing.
[0020] Furthermore, the cable comprises, from the outside in, an insulating outer sheath, a metal wire armor layer, an inner lining layer, and multiple conductors.
[0021] The internal gaps of the cable include the gap between the insulating outer sheath and the metal wire armor layer, the gap between the metal wire armor layer and the inner lining layer, and the gap between the multiple wire cores.
[0022] Furthermore, the inner peripheral wall of the first housing is recessed to form a first flow channel for the insulating grease to flow through;
[0023] The high-pressure resistant sealing connector also includes an isolation cylinder, which is disposed inside the first housing, and a second flow channel communicating with the first flow channel is formed between the outer peripheral wall of the isolation cylinder and the inner peripheral wall of the first housing.
[0024] The isolation cylinder has at least one through hole on its side wall, which is connected to the second flow channel and the cavity respectively.
[0025] Furthermore, the cable includes a stripped section of the metal wire armor layer exposed after the insulation sheath has been removed, the stripped section being housed within the insulating cylinder, thereby providing electrical insulation isolation between the metal wire armor layer and the first housing.
[0026] Furthermore, it also includes a conical sleeve assembly, which includes an outer cylinder and an inner conical sleeve disposed within the outer cylinder. The outer cylinder is disposed within the isolation cylinder and sleeved on the outside of the stripping section, and at least a portion of the metal wire armor layer is sandwiched between the inner conical sleeve and the outer cylinder.
[0027] Furthermore, it also includes a support cylinder, which is disposed inside the first housing, with one end of the support cylinder abutting against the end face of the outer shell and the other end abutting against the end face of the outer cylinder;
[0028] The outer cylinder has a first step on its outer peripheral wall, and the inner peripheral wall of the isolation cylinder has a second step. In the axial direction of the high-pressure resistant sealing connector, the first step abuts against the second step.
[0029] Furthermore, the outer peripheral wall of the isolation cylinder is provided with a third step, and the inner peripheral wall of the first shell is provided with a fourth step;
[0030] The high-pressure resistant sealing connector also includes a gasket. In the axial direction of the high-pressure resistant sealing connector, one side of the gasket abuts against the third step portion and the other side abuts against the fourth step portion, thereby increasing the contact area between the third step portion and the fourth step portion.
[0031] The gasket has a connecting groove for the flow of insulating grease.
[0032] Furthermore, it also includes a locking component. The first housing has a countersunk hole, and the isolation cylinder has a threaded hole that mates with the locking component. The locking component passes through the countersunk hole and is threadedly connected to the threaded hole.
[0033] The inner peripheral wall of the isolation cylinder is provided with a protruding key, the outer peripheral wall of the outer cylinder is provided with a first anti-rotation groove that mates with the protruding key, and the support cylinder is provided with a second anti-rotation groove that mates with the protruding key.
[0034] A second sealing ring is provided between the locking member and the inner peripheral wall of the countersunk hole.
[0035] Furthermore, the first housing is threadedly connected to the outer shell, and a third sealing ring is provided between the inner peripheral wall of the first housing and the outer peripheral wall of the outer shell; and / or,
[0036] The second housing is threadedly connected to the first housing; and / or,
[0037] A fourth sealing ring is provided between the outer peripheral wall of the conductive core and the inner peripheral wall of the outer shell.
[0038] Furthermore, the gap d between the outer peripheral wall of the cable and the inner peripheral wall of the insertion hole satisfies: 0 < d ≤ 2 mm.
[0039] Furthermore, the support member is ring-shaped.
[0040] Compared with the prior art, the advantages of this invention are:
[0041] This application places the elastic bladder inside the connector, with insulating grease filling the space between its inner circumference and the cable. External high-pressure well fluid flows into the second housing only through the gap between the cable and the insertion hole, pushing the support component without directly contacting the elastic bladder. Therefore, the elastic bladder is completely isolated from the external well fluid, avoiding chemical corrosion and solid particle erosion, significantly extending the bladder's service life. Furthermore, external water flows into the second housing only through the extremely small gap between the cable and the insertion hole, effectively preventing the entry of impurities such as mud and sand particles, avoiding the risk of impurities getting stuck between the support component and the second housing. Therefore, the elastic bladder can smoothly compress and return axially, ensuring long-term reliable pressure compensation. Moreover, this application positions the elastic bladder of the movable bladder assembly on the outside of the cable and allows it to extend and retract along the cable's axial direction. That is, the elastic bladder folds or extends axially. Compared to placing the elastic bladder radially outside the cavity to be compensated, this axial layout greatly reduces the connector's radial dimension, making it slender and easily adaptable to the assembly requirements of narrow downhole channels. Attached Figure Description
[0042] Figure 1 This is a cross-sectional view of a high-pressure resistant sealed connector.
[0043] Figure 2 for Figure 1 Enlarged view of section A in the middle;
[0044] Figure 3 for Figure 1 Enlarged view of section B;
[0045] Figure 4 A cross-sectional view of the active sac assembly;
[0046] Figure 5 This is a sectional view of the support component;
[0047] Figure 6 This is a schematic diagram of the isolation cylinder structure;
[0048] Figure 7 This is an exploded view of the tapered sleeve assembly;
[0049] Figure 8 This is a schematic diagram of the gasket structure;
[0050] Figure 9 This is a schematic diagram of the support cylinder structure;
[0051] Figure 10 This is a schematic diagram of the first shell structure;
[0052] Figure 11 This is a cross-sectional view of the first shell.
[0053] 1. Outer shell; 10. Third sealing ring; 11. Fourth sealing ring; 2. Conductive core; 20. Terminal; 100. First housing; 101. Cavity; 110. First bulge; 120. First flow channel; 130. Second flow channel; 140. Fourth step; 150. Countersunk hole; 200. Second housing; 210. Insertion hole; 300. Cable; 310. Insulating outer sheath; 320. Metal wire armor layer; 330. Inner lining layer; 340. Wire core; 350. Stripped section; 400. Movable bladder assembly; 410. Elastic bladder; 411. Telescopic part; 412. First connecting part; 4120. First sealing groove; 41 3. Second connecting part; 4130. Second convex bulge; 420. Support member; 421. Outer vulcanizing groove; 422. Inner vulcanizing groove; 423. Receiving groove; 430. First sealing ring; 500. Isolation cylinder; 510. Through hole; 520. Second step part; 530. Third step part; 540. Threaded hole; 550. Protruding key; 560. Flow expansion groove; 600. Tapered sleeve assembly; 610. Outer cylinder; 611. First anti-rotation groove; 612. First step part; 620. Inner tapered sleeve; 700. Support cylinder; 710. Second anti-rotation groove; 800. Gasket; 810. Connecting groove; 900. Locking member; 910. Second sealing ring. Detailed Implementation
[0054] The following detailed, non-limiting description of the invention's technical solutions, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.
[0055] like Figures 1-3As shown, a high-pressure resistant sealed connector according to an embodiment of the present invention includes a conductive component, a first housing 100, a second housing 200, a cable 300, and a movable bladder assembly 400. The conductive component includes a housing 1 and a conductive core 2 disposed within the housing 1. The first housing 100 is connected to one end of the housing 1, and a cavity 101 is provided inside the first housing 100. The terminal 20 of the conductive core 2 is located within the cavity 101. The second housing 200 is connected to the end of the first housing 100 away from the housing 1, and an insertion hole 210 is provided at the end of the second housing 200 away from the first housing 100. The cable 300 extends into the second housing 200 through the insertion hole 210, and the outer peripheral wall of the cable 300 is flush with the inner peripheral wall of the insertion hole 210. A gap is formed between the walls to allow external water to flow in. The core 340 of the cable 300 is at least partially located in the cavity 101 and electrically connected to the terminal 20 of the conductive core 2. The movable bladder assembly 400 includes an elastic bladder 410 and a support member 420 connected to the elastic bladder 410. The elastic bladder 410 is sleeved on the outside of the cable 300, and insulating grease is filled between the inner peripheral wall of the elastic bladder 410 and the outer peripheral wall of the cable 300. The end of the elastic bladder 410 away from the support member 420 is sealed and connected between the first housing 100 and the second housing 200. The support member 420 is sealed and connected between the inner peripheral wall of the second housing 200 and the outer peripheral wall of the cable 300 and can slide along the axial direction of the cable 300. When the high-pressure resistant sealed connector is in a high-pressure environment, external water flows through the gap between the outer peripheral wall of the cable 300 and the inner peripheral wall of the insertion hole 210 into the second housing 200 and pushes the support member 420 towards the first housing 100. This, in turn, pushes the insulating grease between the inner peripheral wall of the elastic bladder 410 and the outer peripheral wall of the cable 300 to fill the cavity 101 of the first housing 100 and the internal gap of the cable 300. In this application, the elastic bladder 410 is located inside the connector, and the space between its inner peripheral wall and the cable 300 is filled with insulating grease. The external high-pressure well fluid only flows into the second housing 200 through the gap between the cable 300 and the insertion hole 210 to push the support member 420, and does not directly contact the elastic bladder 410. Therefore, the elastic bladder 410 is completely isolated from the external well fluid, avoiding chemical corrosion and solid particle erosion by the well fluid, and significantly extending the service life of the bladder. In addition, external water flows into the second housing 200 only through the gap between the cable 300 and the insertion hole 210. This gap is extremely small and can effectively block impurities such as mud and sand particles from entering, avoiding the risk of impurities getting stuck between the support 420 and the second housing 200. Therefore, the elastic bladder 410 can be smoothly axially compressed and reset, ensuring the long-term reliability of the pressure compensation function.Furthermore, in this application, the elastic bladder 410 of the movable bladder assembly 400 is arranged on the outside of the cable 300 and extends and retracts along the axial direction of the cable 300. That is, the elastic bladder 410 folds or extends axially. Compared with arranging the elastic bladder on the radial outside of the cavity to be compensated, this axial layout greatly reduces the radial dimension of the connector, making it slender and easy to adapt to the assembly requirements of narrow downhole channels.
[0056] The gap between the outer peripheral wall of the cable 300 and the inner peripheral wall of the insertion hole 210 is preferably a small gap. In this embodiment, reference... Figure 3 The gap d between the outer peripheral wall of the cable 300 and the inner peripheral wall of the insertion hole 210 satisfies: 0 < d ≤ 2 mm.
[0057] In this embodiment, silicone grease is used as the insulating grease. Before using the connector, silicone grease can be pre-filled into the cavity 101 of the first housing 100. However, due to the poor fluidity of silicone grease, some gaps will still remain in the cavity 101. At the same time, due to the immature cable manufacturing process, there are tiny gaps inside the cable 300. Therefore, when the connector enters a high-pressure environment, the external water flow pushes the support 420 towards the first housing 100, thereby squeezing the elastic bladder 410. This causes the silicone grease to gradually fill the residual gaps in the cavity 101 and the tiny gaps inside the cable 300 under the thrust, ensuring the pressure balance inside and outside the connector, thereby improving the connector's high-pressure resistance. Furthermore, because silicone grease has high viscosity and good insulating properties, it is not prone to leakage during the filling process and can stably adhere to the internal gaps of the cable 300 and the residual gaps in the cavity 101 for a long time, forming a stable and continuous insulating barrier. Of course, before using the connector, it is also possible to choose not to pre-fill the cavity 101 of the first housing 100 with silicone grease, but only fill the space between the inner peripheral wall of the elastic bladder 410 and the outer peripheral wall of the cable 300 with silicone grease. In this case, the requirements for the amount of silicone grease are higher, and it is necessary to ensure that the elastic bladder 410 has sufficient length to accommodate a sufficient amount of silicone grease, so as to fully fill the cavity 101 and the internal gap of the cable 300 under high pressure. When the connector is in a high-temperature environment, the silicone grease expands in volume, and the elastic bladder 410 can also stretch according to the pressure change to avoid the problem of pressure leakage caused by excessive internal pressure.
[0058] In this embodiment, the cable 300 is an armored cable, which includes, from the outside in, an insulating outer sheath 310, a metal wire armor layer 320, an inner lining layer 330, and multiple wire cores 340. The internal gaps of the cable 300 include the gap between the insulating outer sheath 310 and the metal wire armor layer 320, the gap between the metal wire armor layer 320 and the inner lining layer 330, and the gaps between the multiple wire cores 340.
[0059] like Figure 1As shown, the first housing 100 is threadedly connected to the outer shell 1, and a third sealing ring 10 is provided between the inner peripheral wall of the first housing 100 and the outer peripheral wall of the outer shell 1. The second housing 200 is threadedly connected to the first housing 100. Furthermore, a fourth sealing ring 11 is provided between the outer peripheral wall of the conductive core 2 and the inner peripheral wall of the outer shell 1. By providing the third sealing ring 10 and the fourth sealing ring 11, good sealing performance is ensured on the side of the cavity 101 near the conductive core 2 and at the connection between the first housing 100 and the outer shell 1, thereby improving the overall sealing reliability of the connector under high-pressure environments.
[0060] In this embodiment, the support member 420 is ring-shaped, and the elastic bladder 410 is integrally formed and connected to the support member 420 through a vulcanization process. The elastic bladder 410 is made of rubber, and the support member 420 is made of metal.
[0061] Further reference Figure 5 The outer peripheral wall of the support member 420 has an inner vulcanizing groove 421, and the end of the elastic bladder 410 near the support member 420 is at least partially embedded in the outer vulcanizing groove 421. The inner peripheral wall of the support member 420 has an inner vulcanizing groove 422, and the end of the elastic bladder 410 near the support member 420 is at least partially embedded in the inner vulcanizing groove 422. Specifically, the outer vulcanizing groove 421 is an annular groove surrounding the outer peripheral wall of the support member 420, and the inner vulcanizing groove 422 is an annular groove surrounding the inner peripheral wall. During the vulcanization process, the molten rubber not only covers the end face of the support member 420 but also flows into and fills these annular grooves. After cooling, this greatly increases the contact area and mechanical interlocking force between the elastic bladder 410 and the support member 420, preventing the elastic bladder 410 from detaching from the support member 420 and improving reliability. Both the outer vulcanizing tank 421 and the inner vulcanizing tank 422 have a dovetail groove structure in cross-section, meaning the width of the groove opening is smaller than the width of the groove bottom. This structure allows the rubber to form a hook-shaped embedded part after vulcanization and cooling, further enhancing the connection reliability between the elastic bladder 410 and the support member 420.
[0062] For details, please refer to Figure 4 The elastic bladder 410 includes a corrugated telescopic portion 411, a first connecting portion 412 connected to one end of the telescopic portion 411, and a second connecting portion 413 connected to the other end of the telescopic portion 411. (See reference) Figure 2 and Figure 4 The inner peripheral wall of the first connecting portion 412 is recessed to form a first sealing groove 4120, and the outer peripheral wall of the first housing 100 is protruding to form a first protrusion 110 that is interference-fitted with the first sealing groove 4120. (Reference) Figure 3 and Figure 4The second connecting portion 413 is at least partially connected to the inner peripheral wall of the support member 420, and the inner peripheral wall of the second connecting portion 413 protrudes to form a second protrusion 4130, which is interference-fitted with the outer peripheral wall of the cable 300. Furthermore, refer to... Figure 3 and Figure 5 The outer peripheral wall of the support member 420 has a recessed receiving groove 423, and a first sealing ring 430 is embedded in the receiving groove 423. The first sealing ring 430 is sealed and fitted with the inner peripheral wall of the second housing 200. Through the above structure, multiple sealing fits are formed between the elastic bladder 410, the support member 420, the first housing 100, the second housing 200, and the cable 300.
[0063] like Figure 2 and Figure 11 As shown, the inner peripheral wall of the first housing 100 is recessed to form a first flow channel 120 for the flow of insulating grease. Furthermore, the high-voltage resistant sealing connector also includes an isolation cylinder 500, which is disposed within the first housing 100. A second flow channel 130, communicating with the first flow channel 120, is formed between the outer peripheral wall of the isolation cylinder 500 and the inner peripheral wall of the first housing 100. At least one through hole 510 is provided on the side wall of the isolation cylinder 500, communicating with both the second flow channel 130 and the cavity 101. When the high-voltage resistant sealing connector is in a high-pressure environment, a pressure difference is formed between the cavity 101 within the first housing 100 and the external environment. Under the action of this pressure difference, the support member 420 slides axially, causing the telescopic portion 411 of the elastic bladder 410 to contract. This allows the insulating grease contained within the elastic bladder 410 to sequentially flow into the cavity 101 through the first flow channel 120, the second flow channel 130, and the through hole 510. Simultaneously, the insulating grease also permeates and fills the tiny gaps inside the cable 300.
[0064] like Figure 11 As shown, the first flow channel 120 extends axially along the first housing 100, and one end of the first flow channel 120 communicates with the second flow channel 130, while the other end of the first flow channel 120 communicates with the inner side of the telescopic portion 411. Further reference... Figure 10 The first flow channel 120 is provided in multiple ways, and the multiple first flow channels 120 are arranged at intervals along the circumference of the first housing 100.
[0065] Further reference Figure 6 The outer peripheral wall of the isolation cylinder 500 is recessed to form a flow-expanding groove 560, which is used to further increase the cross-sectional area of the second flow channel 130 to increase the flow rate of insulating grease, thereby improving the efficiency of replenishing insulating grease into the cavity 101. The flow-expanding groove 560 extends along the axial direction of the isolation cylinder 500.
[0066] like Figure 2As shown, the cable 300 includes a stripped section 350 of the metal wire armor layer 320 exposed after the insulation sheath 310 is stripped off. The stripped section 350 is housed in the insulating cylinder 500, thereby providing electrical insulation isolation between the metal wire armor layer 320 and the first housing 100.
[0067] In some preferred embodiments, reference Figure 2 and Figure 7 The high-pressure resistant sealed connector also includes a tapered sleeve assembly 600, which includes an outer cylinder 610 and an inner tapered sleeve 620 disposed within the outer cylinder 610. The outer cylinder 610 is disposed within the isolation cylinder 500 and sleeved on the outside of the stripped section 350. At least a portion of the metal wire armor layer 320 is sandwiched between the inner tapered sleeve 620 and the outer cylinder 610. The inner tapered sleeve 620 cooperates with the outer cylinder 610 to clamp and fix the metal wire armor layer 320, thereby improving the tensile strength of the cable 300.
[0068] In some preferred embodiments, reference Figure 2 The high-pressure resistant sealed connector also includes a support cylinder 700, which is disposed inside the first housing 100. One end of the support cylinder 700 abuts against the end face of the outer housing 1, and the other end abuts against the end face of the outer cylinder 610. The outer peripheral wall of the outer cylinder 610 is provided with a first step portion 612, and the inner peripheral wall of the isolation cylinder 500 is provided with a second step portion 520. In the axial direction of the high-pressure resistant sealed connector, the first step portion 612 abuts against the second step portion 520. The support cylinder 700 and the second step portion 520 of the isolation cylinder 500 work together to restrict the axial displacement of the outer cylinder 610 from both sides, preventing the tapered sleeve assembly 600 from axially moving.
[0069] like Figure 2 As shown, the outer peripheral wall of the isolation cylinder 500 is provided with a third step portion 530, and the inner peripheral wall of the first housing 100 is provided with a fourth step portion 140. The high-pressure resistant sealing connector also includes a gasket 800. In the axial direction of the high-pressure resistant sealing connector, one side of the gasket 800 abuts against the third step portion 530, and the other side abuts against the fourth step portion 140, thereby increasing the contact area between the third step portion 530 and the fourth step portion 140. When the cable 300 is subjected to tensile force, the tapered sleeve assembly 600 transmits the tensile force to the isolation cylinder 500 through the outer cylinder 610, and then acts on the gasket 800 through the third step portion 530, and finally transmits it to the fourth step portion 140 of the first housing 100. By setting the gasket 800, the spatial overlap area between the third step portion 530 and the fourth step portion 140 can be effectively increased, avoiding stress concentration caused by insufficient contact area, preventing shear failure of the isolation cylinder 500 due to excessive local stress, thereby improving the overall tensile load-bearing capacity and structural reliability of the high-pressure resistant sealing connector.
[0070] In addition, in order not to affect the normal flow of insulating grease, refer to Figure 8The gasket 800 is provided with a connecting groove 810, which is used to allow insulating grease to flow.
[0071] In some preferred embodiments, the high-pressure resistant sealing connector further includes a locking member 900. The first housing 100 has a countersunk hole 150, and the isolation cylinder 500 has a threaded hole 540 that mates with the locking member 900. The locking member 900 passes through the countersunk hole 150 and is threadedly connected to the threaded hole 540. By providing the locking member 900, the isolation cylinder 500 and the first housing 100 can be reliably locked in both the axial and circumferential directions.
[0072] Further reference Figure 6 , Figure 7 and Figure 9 The inner circumferential wall of the isolation cylinder 500 is provided with a protruding key 550, the outer circumferential wall of the outer cylinder 610 is provided with a first anti-rotation groove 611 that mates with the protruding key 550, and the support cylinder 700 is provided with a second anti-rotation groove 710 that mates with the protruding key 550. The protruding key 550 is embedded in the first anti-rotation groove 611 and the second anti-rotation groove 710, which can restrict the outer cylinder 610 and the support cylinder 700 from circumferentially rotating relative to the isolation cylinder 500.
[0073] Further reference Figure 2 , Figure 10 and Figure 11 A second sealing ring 910 is provided between the locking member 900 and the inner peripheral wall of the countersunk hole 150. The second sealing ring 910 is used to seal the gap between the locking member 900 and the first housing 100, preventing external media from seeping into the connector through the countersunk hole 150, thereby further improving the sealing performance of the high-pressure resistant sealed connector.
[0074] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.
Claims
1. A high-pressure resistant sealed connector, characterized in that, include: A conductive component, the conductive component including a housing (1) and a conductive core (2) disposed within the housing (1); A first housing (100) is connected to one end of the outer shell (1), and a cavity (101) is provided inside the first housing (100), and the terminal (20) of the conductive core (2) is located inside the cavity (101); The second housing (200) is connected to the end of the first housing (100) away from the outer shell (1), and the end of the second housing (200) away from the first housing (100) is provided with an insertion hole (210). A cable (300) extends into the second housing (200) through the insertion hole (210), and a gap is formed between the outer peripheral wall of the cable (300) and the inner peripheral wall of the insertion hole (210). The core (340) of the cable (300) is at least partially located in the cavity (101) and electrically connected to the terminal (20) of the conductive core (2). A movable bladder assembly (400) includes an elastic bladder (410) and a support member (420) connected to the elastic bladder (410). The elastic bladder (410) is sleeved on the outside of the cable (300), and the inner peripheral wall of the elastic bladder (410) and the outer peripheral wall of the cable (300) are filled with insulating grease. One end of the elastic bladder (410) away from the support member (420) is sealed between the first housing (100) and the second housing (200). The support member (420) is sealed between the inner peripheral wall of the second housing (200) and the outer peripheral wall of the cable (300) and can slide along the axial direction of the cable (300). When the high-pressure resistant sealed connector is in a high-pressure environment, external water flows through the gap between the outer peripheral wall of the cable (300) and the inner peripheral wall of the insertion hole (210) into the second housing (200) and pushes the support (420) to move towards the first housing (100), thereby pushing the insulating grease between the inner peripheral wall of the elastic bladder (410) and the outer peripheral wall of the cable (300) to fill the cavity (101) of the first housing (100) and the internal gap of the cable (300).
2. The high-pressure resistant sealed connector according to claim 1, characterized in that, The elastic bladder (410) is integrally formed by vulcanization and connected to the support member (420); The outer peripheral wall of the support member (420) is recessed to form an outer vulcanization groove (421), and the elastic bladder (410) at least partially embeds itself in the outer vulcanization groove (421) at one end near the support member (420); and / or, The inner peripheral wall of the support member (420) is recessed to form an inner vulcanization groove (422), and the elastic bladder (410) is at least partially embedded in the inner vulcanization groove (422) at one end near the support member (420).
3. The high-pressure resistant sealed connector according to claim 1, characterized in that, The elastic bladder (410) includes a corrugated telescopic portion (411), a first connecting portion (412) connected to one end of the telescopic portion (411), and a second connecting portion (413) connected to the other end of the telescopic portion (411). The inner peripheral wall of the first connecting part (412) is recessed to form a first sealing groove (4120), and the outer peripheral wall of the first housing (100) is protruding to form a first protrusion (110) that is interference-fitted with the first sealing groove (4120). The second connecting portion (413) is at least partially connected to the inner peripheral wall of the support member (420), and the inner peripheral wall of the second connecting portion (413) protrudes to form a second protrusion (4130), which is interference-fitted with the outer peripheral wall of the cable (300).
4. The high-pressure resistant sealed connector according to claim 1, characterized in that, The outer peripheral wall of the support member (420) is recessed to form a receiving groove (423), and a first sealing ring (430) is embedded in the receiving groove (423). The first sealing ring (430) is sealed to the inner peripheral wall of the second housing (200).
5. The high-pressure resistant sealed connector according to claim 1, characterized in that, The cable (300) includes, from the outside to the inside, an insulating outer sheath (310), a metal wire armor layer (320), an inner lining layer (330), and multiple wire cores (340). The internal gaps of the cable (300) include the gap between the insulating outer sheath (310) and the wire armor layer (320), the gap between the wire armor layer (320) and the inner lining layer (330), and the gap between the multiple wire cores (340).
6. The high-pressure resistant sealed connector according to claim 5, characterized in that, The inner peripheral wall of the first housing (100) is recessed to form a first flow channel (120) for the insulating grease to flow through. The high-pressure resistant sealing connector also includes an isolation cylinder (500), which is disposed inside the first housing (100), and a second flow channel (130) communicating with the first flow channel (120) is formed between the outer peripheral wall of the isolation cylinder (500) and the inner peripheral wall of the first housing (100). The isolation cylinder (500) has at least one through hole (510) on its side wall, and the through hole (510) is connected to the second flow channel (130) and the cavity (101) respectively.
7. The high-pressure resistant sealed connector according to claim 6, characterized in that, The cable (300) includes a stripped section (350) of the wire armor layer (320) exposed by stripping the insulation sheath (310), the stripped section (350) being housed within the insulating cylinder (500) to provide electrical insulation isolation between the wire armor layer (320) and the first housing (100).
8. The high-pressure resistant sealed connector according to claim 7, characterized in that, It also includes a conical sleeve assembly (600), which includes an outer cylinder (610) and an inner conical sleeve (620) disposed within the outer cylinder (610). The outer cylinder (610) is disposed within the isolation cylinder (500) and sleeved on the outside of the stripping section (350). At least a portion of the wire armor layer (320) is sandwiched between the inner conical sleeve (620) and the outer cylinder (610).
9. The high-pressure resistant sealed connector according to claim 8, characterized in that, It also includes a support cylinder (700), which is disposed inside the first housing (100). One end of the support cylinder (700) abuts against the end face of the outer shell (1), and the other end abuts against the end face of the outer cylinder (610). The outer cylinder (610) has a first step (612) on its outer peripheral wall and the inner peripheral wall of the isolation cylinder (500) has a second step (520). In the axial direction of the high-pressure resistant sealing connector, the first step (612) abuts against the second step (520).
10. The high-pressure resistant sealed connector according to claim 9, characterized in that, The outer peripheral wall of the isolation cylinder (500) is provided with a third step (530), and the inner peripheral wall of the first shell (100) is provided with a fourth step (140). The high-pressure resistant sealing connector also includes a gasket (800). In the axial direction of the high-pressure resistant sealing connector, one side of the gasket (800) abuts against the third step portion (530), and the other side abuts against the fourth step portion (140), which is used to increase the contact area between the third step portion (530) and the fourth step portion (140). The gasket (800) is provided with a connecting groove (810) for the flow of the insulating grease.
11. The high-pressure resistant sealed connector according to claim 10, characterized in that, It also includes a locking member (900), the first housing (100) is provided with a countersunk hole (150), the isolation cylinder (500) is provided with a threaded hole (540) that mates with the locking member (900), the locking member (900) passes through the countersunk hole (150) and is threadedly connected to the threaded hole (540); The inner peripheral wall of the isolation cylinder (500) is provided with a protruding key (550), the outer peripheral wall of the outer cylinder (610) is provided with a first anti-rotation groove (611) that cooperates with the protruding key (550), and the support cylinder (700) is provided with a second anti-rotation groove (710) that cooperates with the protruding key (550). A second sealing ring (910) is provided between the locking member (900) and the inner peripheral wall of the countersunk hole (150).
12. The high-pressure resistant sealed connector according to claim 1, characterized in that, The first housing (100) is threadedly connected to the outer shell (1), and a third sealing ring (10) is provided between the inner peripheral wall of the first housing (100) and the outer peripheral wall of the outer shell (1); and / or, The second housing (200) is threadedly connected to the first housing (100); and / or, A fourth sealing ring (11) is provided between the outer peripheral wall of the conductive core (2) and the inner peripheral wall of the outer shell (1).
13. The high-pressure resistant sealed connector according to claim 1, characterized in that, The gap d between the outer peripheral wall of the cable (300) and the inner peripheral wall of the insertion hole (210) satisfies: 0 < d ≤ 2 mm.
14. The high-pressure resistant sealed connector according to claim 1, characterized in that, The support member (420) is ring-shaped.