Double seal ring connection

Abstract

A double seal ring connector comprises: a first elastic seal ring; a second elastic seal ring partially embedded in the first elastic seal ring; characterized in that the double seal ring connector comprises a receiving part and an insertion part; the shape of the insertion part corresponds to the receiving part and is fitted into the receiving part; the insertion part comprises a joint, a connecting rod and a locking boss; the connecting rod extends in a radial direction, an axial direction or a circumferential direction; the joint is arranged at the end of the connecting rod and is mirror symmetric along its symmetry axis; the locking boss is arranged on both sides of the connecting rod and is spaced a distance from the connecting rod; the locking boss extends in the same direction as the connecting rod, and the length of the locking boss in the extension direction is less than 2 / 3 of the sum of the lengths of the joint and the connecting rod in the extension direction of the connecting rod.

Description

Technical Field

[0001] This application relates to a connector, specifically a connector for rotating or reciprocating components in mechanical equipment, which includes a double sealing ring structure. Background Technology

[0002] To improve the sealing performance of hydraulic and pneumatic systems, extend equipment life, and reduce energy consumption, seals are crucial components of pneumatic systems. Traditional single-type sealing rings are insufficient for complex operating conditions; therefore, integral sealing ring combination designs are adopted, combining different materials and structures to ensure system reliability. However, traditional combined sealing structures are prone to separation, especially under uneven pressure or severe compression, which may lead to seal failure. Meanwhile, while rotary oil seals offer good overall performance, their installation and disassembly are difficult, potentially damaging other equipment components and affecting equipment operating efficiency and quality.

[0003] To address these issues, anti-deformation hook-and-loop hydraulic-pneumatic combination seals and split-type oil seals have emerged. This technology consists of two sealing rings connected by an interlocking interface, featuring a counter-force anti-dislodgement structure. Split-type oil seals employ a design with a cutout at a point in the ring structure, allowing for easy installation and removal without interfering with other components. However, the presence of the cutout may reduce the device's sealing performance, operability, and reliability.

[0004] Existing double-ring split bearing protectors employ interlocking joints to improve the overall structural integrity of the bearing protector and ensure reliable operation. However, due to the straight cut of the inner ring and the thermal expansion and contraction characteristics of the elastic material, gaps may appear at the inner ring cut, leading to a decrease in sealing performance. Furthermore, the design of anti-deformation hook-and-loop connection combination seals used in hydraulic and pneumatic cylinders presents challenges such as difficulty in controlling the size of the interlocking joint and the impact of heat on the elastic material.

[0005] In conclusion, developing a stable, easy-to-install and disassemble, and highly airtight hydraulic-pneumatic combined sealing technology remains a challenge. It requires overcoming material properties and structural issues in the design to ensure reliable operation under various working conditions. Summary of the Invention

[0006] The purpose of this application is to solve one or more of the above-mentioned technical problems. Therefore, this application provides a double sealing ring connector that overcomes material properties and structural problems, ensuring reliable operation under various working conditions.

[0007] This application discloses a double-sealing ring connector, comprising: a first elastic sealing ring; and a second elastic sealing ring partially embedded in the first elastic sealing ring. The double-sealing ring connector includes a receiving portion and an insertion portion. The shape of the insertion portion corresponds to and fits into the receiving portion. The insertion portion includes a connector, a connecting rod, and a locking boss. The connecting rod extends in a radial, axial, or circumferential direction. The connector is disposed at the end of the connecting rod and is mirror-symmetrical along its axis of symmetry. The locking boss is disposed on both sides of the connecting rod and spaced a distance from it. The locking boss extends in the same direction as the connecting rod, and its length in the extending direction is less than 2 / 3 of the sum of the lengths of the connector and the connecting rod in the extending direction of the connecting rod.

[0008] According to an optional embodiment, the receiving portion is disposed on one of the first elastic sealing ring or the second elastic sealing ring, and the insertion portion is disposed on the other of the first elastic sealing ring or the second elastic sealing ring; or the first elastic sealing ring includes a first radial cut, the second elastic sealing ring includes a second radial cut that is offset from the first radial cut by more than 5 degrees in the circumferential direction, the receiving portion and the insertion portion are jointly disposed on the first elastic sealing ring and separated by the first radial cut, and another receiving portion and another insertion portion are jointly disposed on the second elastic sealing ring and separated by the second radial cut.

[0009] According to an optional embodiment, when the first elastic sealing ring and the second elastic sealing ring each include an insertion portion, the insertion portion provided on the first elastic sealing ring has a different shape from another insertion portion provided on the second elastic sealing ring, and the size of the latter is 35%-75% of that of the former.

[0010] According to an optional embodiment, the joint includes a smooth section and inclined sections disposed on both sides of the smooth section; the outer edge of the smooth section is a straight line or an arc, and its length is less than the length of the base of the connecting rod in the direction perpendicular to the extension direction of the connecting rod; the length of the inclined section is 30%-80% of the sum of the lengths of the joint and the connecting rod in the extension direction of the connecting rod; the angle between the inclined section and the connecting rod is an acute angle; in the direction perpendicular to the extension direction of the connecting rod, the maximum length of the joint is 130%-200% of the length of the base of the connecting rod.

[0011] According to optional embodiments, the cross-sectional shape of the joint includes semi-circular, elliptical, trapezoidal, anchor-shaped, or crescent-shaped.

[0012] According to an optional embodiment, the locking boss includes a protrusion extending toward the connecting rod; the angle between the extending direction of the locking boss and the extending direction of the connecting rod is 5°-35°, such that a spacer sleeve structure is formed between the portion of the receiving portion corresponding to the connecting rod and the portion corresponding to the locking boss.

[0013] According to an optional implementation, the connecting rod has a shape that tapers as it extends; the side of the connecting rod is curved.

[0014] According to an optional embodiment, the spacer sleeve structure has at least one elastically bent deformation portion with a radius of curvature of 1-4 mm, such that when the insertion portion is inserted into the receiving portion, the protrusion squeezes the spacer sleeve structure so that the spacer sleeve structure elastically deforms and abuts against the connecting rod and the joint.

[0015] According to an optional implementation, the spacing between the connector and the locking boss is 1 to 3 times the difference between the maximum length of the connector in the direction perpendicular to the extension of the connecting rod and the minimum length of the connecting rod in the direction perpendicular to the extension of the connecting rod.

[0016] According to an optional embodiment, the first elastic sealing ring and the second elastic sealing ring are made of rubber and plastic materials with the same or different hardness.

[0017] The double sealing ring connector according to this application has the following advantages:

[0018] The spacer sleeve structure formed between the portion of the receiving part corresponding to the connecting rod and the portion corresponding to the locking boss can improve the elastic expansion performance of the receiving part's connector, making it easier for the connector to pass through.

[0019] The locking boss can restore and enhance the elasticity of the spacer sleeve structure, allowing the spacer sleeve structure to maintain good elasticity for a long time.

[0020] The protruding part of the locking boss presses against the spacer sleeve structure, causing it to elastically deform and compensate for the interference fit formed by the fit gap between the spacer sleeve structure and the connecting rod. This improves the clamping effect of the receiving part on the joint and the connecting rod, thereby effectively enhancing the connection strength of the double sealing ring connector.

[0021] The protrusion of the locking boss provides a secondary locking of the connector. This prevents loosening at the interface of the receiving part.

[0022] Due to the above advantages, the double sealing ring connector according to this application can effectively avoid serious misalignment and dislocation between the seals due to compression during operation, improve sealing ability, and ensure the reliability of equipment operation. Attached Figure Description

[0023] A more complete understanding of the foregoing and other aspects of this application will be gained from the detailed description that follows, in conjunction with the accompanying drawings. It should be noted that the scale of the drawings may vary for clarity, but this will not affect the understanding of this application.

[0024] Figure 1 This is a cross-sectional view of the double sealing ring connector according to the first embodiment of this application.

[0025] Figure 2 This is a cross-sectional view of the double sealing ring connector according to the second embodiment of this application.

[0026] Figure 3 This is a cross-sectional view of the double sealing ring connector according to the third embodiment of this application.

[0027] Figure 4 This is a cross-sectional view of the double sealing ring connector according to the fourth embodiment of this application.

[0028] Figure 5 This is a cross-sectional view of the double sealing ring connector according to the fifth embodiment of this application.

[0029] Figure 6 This is a schematic diagram of a double sealing ring connector according to the sixth embodiment of this application.

[0030] Figure 7 yes Figure 6 A cross-sectional view of the double-sealing ring connector along line AA.

[0031] Figure 8 yes Figure 6 A side view of the double-sealing ring connector along direction B.

[0032] Figure 9 This is a side view of the double sealing ring connector according to the seventh embodiment of this application. Detailed Implementation

[0033] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] It should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0037] It should be noted that the terms "installation", "connection", and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components.

[0038] Figure 1 This is a cross-sectional view of a double-sealing ring connector according to the first embodiment of this application. Figures 1-9 In this diagram, the axial direction is represented by x, the radial direction by y, and the circumferential direction by z. For example... Figure 1 As shown, the double-sealing ring connector includes a first elastic sealing ring 1 and a second elastic sealing ring 2. The first elastic sealing ring 1 and the second elastic sealing ring 2 can be made of rubber-plastic materials with the same or different hardness. Rubber-plastic materials are synthetic materials that possess the properties of both rubber and plastics and are commonly used in a variety of applications. These materials are characterized by good elasticity, abrasion resistance, chemical resistance, and dimensional stability.

[0039] The first elastic sealing ring 1 includes a groove for receiving the O-ring 3. The second elastic sealing ring 2 is disposed inside the first elastic sealing ring 1 in the radial direction y and is partially embedded in the first elastic sealing ring 1 in the radial direction y. Furthermore, the first elastic sealing ring 1 also abuts against the second elastic sealing ring 2 in the axial direction x. The forces acting on the first elastic sealing ring 1 and the second elastic sealing ring 2 are generally opposite in the radial direction y, which requires the first elastic sealing ring 1 and the second elastic sealing ring 2 to resist such forces to prevent them from disengaging from each other in the radial direction y. To achieve a secure connection in the radial direction y, the double sealing ring connector according to the first embodiment of this application is provided with an interlocking nested structure.

[0040] See further Figure 1 The first elastic sealing ring 1 includes a receiving portion 10 disposed on its inner circumferential surface. The second elastic sealing ring 2 includes an insertion portion 20 disposed on its outer circumferential surface. The shape of the receiving portion 10 corresponds to the shape of the insertion portion 20. In other words, when the insertion portion 20 is inserted into the receiving portion 10, there is no gap between the receiving portion 10 and the insertion portion 20. This achieves a seal, preventing the passage of liquid or gas.

[0041] See further Figure 1 The insertion part 20 includes a connector 200, a connecting rod 201, and a locking boss 202. The connecting rod 201 extends outward from the outer peripheral surface of the second elastic sealing ring 2 in the radial direction y. The length of the connecting rod 201 in the axial direction y gradually decreases as the connecting rod 201 extends outward in the radial direction y. The side surface of the connecting rod 201 is curved. The connector 200 is disposed at the end of the connecting rod 201 and is mirror-symmetrical along its axis of symmetry. The locking boss 202 is disposed on both sides of the connecting rod 201 in the axial direction x, and is spaced a distance from the connecting rod 201 on each side. The locking boss 202 extends outward from the outer peripheral surface of the second elastic sealing ring 2 in the radial direction y, and its length in the radial direction y is less than 2 / 3 of the sum of the lengths of the connector 200 in the radial direction and the lengths of the connecting rod 201 in the radial direction.

[0042] See further Figure 1 The connector 200 includes a gentle section and inclined sections on either side of the gentle section on the radial side away from the connecting rod 201. The length of the gentle section in the axial direction x is less than the length of the base of the connecting rod 201 in the axial direction x. The length of the inclined sections in the axial direction x is 30%-80% of the sum of the length of the connector 200 in the radial direction y and the length of the connecting rod 201 in the radial direction y. The angle between the inclined sections and the connecting rod 201 is an acute angle. In the axial direction x, the maximum length of the connector 200 is 130%-200% of the length of the base of the connecting rod 201.

[0043] See further Figure 1 The locking boss 202 includes a protrusion extending toward the connecting rod 201. The protrusion forms an angle of 5°-35° with the axial direction x, forming a spacer sleeve structure 100 between the portion of the receiving portion 10 corresponding to the connecting rod 201 and the portion corresponding to the locking boss 202. The spacer sleeve structure 100 has at least one elastic bending deformation portion with a radius of curvature of 1-4 mm. The spacing distance between the connector 200 and the locking boss 202 is 1-3 times the difference between the maximum and minimum lengths of the connector 200 in the radial direction y. The spacer sleeve structure formed between the portion of the receiving portion corresponding to the connecting rod and the portion corresponding to the locking boss improves the elastic expansion performance of the receiving portion's insertion port, making it easier for the connector to pass through.

[0044] When the insertion part 20 is not inserted into the receiving part 10, the side of the portion of the receiving part 10 corresponding to the connecting rod 201 is flat. This allows the protrusion to press against the spacer sleeve structure 100 when the insertion part 20 is inserted into the receiving part 10, causing the spacer sleeve structure 100 to elastically deform and abut against the connecting rod 201 and the connector 200. The locking boss 202 can restore and enhance the elasticity of the spacer sleeve structure 100, allowing it to maintain good elasticity for a long time. The protrusion of the locking boss 202 presses against the spacer sleeve structure 100, causing it to elastically deform to compensate for the interference fit formed by the fit gap between the spacer sleeve structure 100 and the connecting rod 201. This improves the clamping effect of the receiving part 10 on the connector 200 and the connecting rod 201, thereby effectively enhancing the connection strength of the double sealing ring connector. The protrusion of the locking boss 202 can provide secondary locking of the connector 200. This prevents loosening at the interface of the receiving part 10.

[0045] Figure 2 This is a cross-sectional view of a double-sealing ring connector according to the second embodiment of this application. Compared with the first embodiment, in the double-sealing ring connector according to the second embodiment of this application, the first elastic sealing ring 1 does not abut against the second elastic sealing ring 2 in the axial direction x, but only in the radial direction y.

[0046] Figure 3 This is a cross-sectional view of a double-sealing ring connector according to a third embodiment of this application. Compared to the second embodiment, in the double-sealing ring connector according to the third embodiment of this application, the first elastic sealing ring 1 includes an insertion portion 20 provided on the inner circumferential surface of the first elastic sealing ring 1. The second elastic sealing ring 2 includes a receiving portion 10 provided on the outer circumferential surface of the second elastic sealing ring 2. In other words, the connecting rod 201 extends inward from the inner circumferential surface of the first elastic sealing ring 1 in the radial direction y. The connector 200 is provided at the end of the connecting rod 201 and is mirror-symmetrical along its axis of symmetry. The length of the connecting rod 201 in the axial direction y gradually decreases as the connecting rod 201 extends inward in the radial direction y. The locking boss 202 extends inward from the inner circumferential surface of the first elastic sealing ring 1 in the radial direction y.

[0047] Figure 4This is a cross-sectional view of a double-sealing ring connector according to the fourth embodiment of this application. Compared to the third embodiment, in the double-sealing ring connector according to the fourth embodiment of this application, the second elastic sealing ring 2 is disposed inside the first elastic sealing ring 1 along the axial direction x, and is partially embedded in the first elastic sealing ring 1 along the axial direction x. The force directions of the first elastic sealing ring 1 and the second elastic sealing ring 2 are generally opposite along the axial direction x, which requires the first elastic sealing ring 1 and the second elastic sealing ring 2 to resist such forces so as not to separate from each other along the axial direction x. In order to achieve a firm connection along the axial direction x, the double-sealing ring connector according to the fourth embodiment of this application is provided with an interlocking nested structure. In addition, the first elastic sealing ring 1 is provided with a stepped portion on the side away from the second elastic sealing ring 2 along the axial direction x, and a protruding ridge is provided on the stepped portion. Figure 4 As shown, the cross-sectional shape of connector 200 is crescent-shaped. It can be understood that the cross-sectional shape of connector 200 may also include semi-circular, elliptical, trapezoidal, and anchor-shaped shapes, etc.

[0048] Figure 5 This is a cross-sectional view of the double-sealing ring connector according to the fifth embodiment of this application. Compared with the fourth embodiment, in the fifth embodiment according to this application, the first elastic sealing ring 1 is provided with a plurality of protrusions on the side away from the second elastic sealing ring 2 in the axial direction x. The second elastic sealing ring 2 is also provided with a plurality of protrusions on the side away from the first elastic sealing ring 1 in the axial direction x.

[0049] Figure 6 This is a schematic diagram of a double-sealing ring connector according to the sixth embodiment of this application. Figure 6 As shown, the double-sealing ring connector includes a first elastic sealing ring 1 and a second elastic sealing ring 2. The first elastic sealing ring 1 and the second elastic sealing ring 2 are made of rubber and plastic materials with the same or different hardness. The second elastic sealing ring 2 is disposed inside the first elastic sealing ring 1 along the radial direction y.

[0050] Figure 7 yes Figure 6 A cross-sectional view of the double-sealing ring connector along line AA. (See attached image.) Figure 7 As shown, the second elastic sealing ring 2 is partially embedded in the first elastic sealing ring 1.

[0051] Figure 8 yes Figure 6 A side view of the double-sealing ring connector along direction B. (See attached image.) Figure 8 As shown, the first elastic sealing ring 1 includes a first radial cutout 11 along the radial direction y and a first circumferential sealing portion 12 and a second circumferential sealing portion 13 disposed on both sides of the first radial cutout 11 along the circumferential direction z. The shapes of the first circumferential sealing portion 12 and the second circumferential sealing portion 13 are complementary and are embedded in each other.

[0052] return Figure 6 Similar to the first elastic sealing ring 1, the second elastic sealing ring 2 includes a second radial cutout 21 along the radial direction y and a third circumferential sealing portion 22 and a fourth circumferential sealing portion 23 disposed on both sides of the second radial cutout 21 along the circumferential direction z. The shapes of the third circumferential sealing portion 22 and the fourth circumferential sealing portion 23 are complementary and are embedded in each other.

[0053] See further Figure 8 The first circumferential sealing portion 12 includes a first circumferential connector 120, a first circumferential connecting rod 121, and a first circumferential locking boss 122. The first circumferential connecting rod 121 extends from the first circumferential sealing portion 12 toward the second circumferential sealing portion 13 along the circumferential direction z. The first circumferential connector 120 is disposed at the end of the first circumferential connecting rod 121 and is mirror-symmetrical along its axis of symmetry. The first circumferential locking boss 122 is disposed on both sides of the first circumferential connecting rod 121 along the axial direction x, and is spaced apart from the first circumferential connecting rod 121 on each side by a certain distance. The first circumferential locking boss 122 extends from the first circumferential sealing portion 12 toward the second circumferential sealing portion 13 along the circumferential direction z, and its length along the circumferential direction z is less than 2 / 3 of the sum of the lengths of the first circumferential connector 120 and the first circumferential connecting rod 121 along the circumferential direction z.

[0054] Figure 9 This is a side view of the double sealing ring connector according to the seventh embodiment of this application. Figure 9 As shown, the first circumferential sealing portion 12 includes a first circumferential connector 120 and a first circumferential connecting rod 121. The second circumferential sealing portion 13 includes a second circumferential locking boss 130. The first circumferential connecting rod 121 extends from the first circumferential sealing portion 12 toward the second circumferential sealing portion 13 along the circumferential direction z. The first circumferential connector 120 is disposed at the end of the first circumferential connecting rod 121 and is mirror-symmetrical about its axis of symmetry. The second circumferential locking boss 130 is disposed on both sides of the portion of the second circumferential sealing portion 13 corresponding to the first circumferential connecting rod 121 along the axial direction x. The second circumferential locking boss 130 extends from the second circumferential sealing portion 13 toward the first circumferential sealing portion 12 along the circumferential direction z, and its length along the circumferential direction z is less than 2 / 3 of the sum of the lengths of the first circumferential connector 120 and the first circumferential connecting rod 121 along the circumferential direction z.

[0055] exist Figures 6-9 In the double-sealing ring connector, the third circumferential sealing portion 22 and the fourth circumferential sealing portion 23 may have the same structure as the first circumferential sealing portion 12 and the second circumferential sealing portion 13, or they may have different structures. For example, in one case, the first circumferential sealing portion 12 and the second circumferential sealing portion 13 have the following structures: Figure 8 The structure shown has the third circumferential sealing portion 22 and the fourth circumferential sealing portion 23 having, as Figure 9The structure is shown. However, regardless of whether the structures of the third circumferential sealing portion 22 and the fourth circumferential sealing portion 23 are the same as those of the first circumferential sealing portion 12 and the second circumferential sealing portion 13, the dimensions of the third circumferential sealing portion 22 and the fourth circumferential sealing portion 23 are 35%-75% of the corresponding dimensions of the first circumferential sealing portion 12 and the second circumferential sealing portion 13. The first radial cut 11 and the second radial cut 21 are offset by more than 5 degrees circumferentially.

[0056] The foregoing description of the embodiments has been provided for illustrative and descriptive purposes. It is not intended to be exhaustive or to limit the embodiments to the described variations. Many modifications and variations will be apparent to those skilled in the art. These embodiments were chosen and described to best illustrate the principles and practical applications, enabling those skilled in the art to understand them from their various implementations and modifications suited to their intended use. Within the framework of these embodiments, the aforementioned components and features may be combined among different implementations.

Claims

1. A double-sealing ring connector, comprising: First elastic sealing ring (1); The second elastic sealing ring (2) is partially embedded in the first elastic sealing ring (1); Its features are, The double sealing ring connector includes a receiving portion (10) and an insertion portion (20); The shape of the insertion part (20) corresponds to that of the receiving part (10) and fits into the receiving part (10); The insertion part (20) includes a connector (200), a connecting rod (201), and a locking boss (202). The connecting rod (201) extends in the radial, axial or circumferential direction; The connector (200) is located at the end of the connecting rod (201) and is mirror-symmetrical along its axis of symmetry; The locking boss (202) is set on both sides of the connecting rod (201) and is spaced a distance from the connecting rod (201); The angle between the extending direction of the locking boss (202) and the extending direction of the connecting rod (201) is 5°-35°, so that a spacer sleeve structure (100) is formed between the portion of the receiving part (10) corresponding to the connecting rod (201) and the portion corresponding to the locking boss (202). The length of the locking boss (202) in the extension direction is less than 2 / 3 of the sum of the lengths of the connector (200) and the connecting rod (201) in the extension direction of the connecting rod (201); The locking boss (202) includes a protrusion extending toward the connecting rod (201); The spacer sleeve structure (100) has at least one elastic bending deformation portion with a radius of curvature of 1-4 mm, such that when the insertion portion (20) is inserted into the receiving portion (10), the protrusion squeezes the spacer sleeve structure (100) so that the spacer sleeve structure (100) elastically deforms to abut against the connecting rod (201) and the connector (200).

2. The double sealing ring connector according to claim 1, wherein, The receiving portion (10) is disposed on one of the first elastic sealing ring (1) or the second elastic sealing ring (2), and the insertion portion (20) is disposed on the other of the first elastic sealing ring (1) or the second elastic sealing ring (2); or The first elastic sealing ring (1) includes a first radial cut (11), and the second elastic sealing ring (2) includes a second radial cut (21) that is offset from the first radial cut (11) by more than 5 degrees in the circumferential direction. The receiving part (10) and the insertion part (20) are jointly disposed on the first elastic sealing ring (1) and separated by the first radial cut (11). Another receiving part (10) and another insertion part (20) are jointly disposed on the second elastic sealing ring (2) and separated by the second radial cut (21).

3. The double sealing ring connector according to claim 2, wherein, When the first elastic sealing ring (1) and the second elastic sealing ring (2) each include an insertion part (20), the insertion part (20) provided on the first elastic sealing ring (1) and another insertion part (20) provided on the second elastic sealing ring (2) have different shapes, and the size of the latter is 35%-75% of that of the former.

4. The double sealing ring connector according to any one of claims 1-3, wherein, The joint (200) includes a gentle section and inclined sections located on both sides of the gentle section; The outer edge of the gentle section is a straight line or an arc, and its length is less than the length of the base of the connecting rod (201) in the direction perpendicular to the extension direction of the connecting rod (201); The length of the inclined section is 30%-80% of the sum of the lengths of the joint (200) and the connecting rod (201) in the extension direction of the connecting rod (201); The angle between the inclined section and the connecting rod (201) is an acute angle; In a direction perpendicular to the extension direction of the connecting rod (201), the maximum length of the joint (200) is 130%-200% of the length of the base of the connecting rod (201).

5. The double sealing ring connector according to any one of claims 1-3, wherein, The cross-sectional shape of the joint (200) includes semi-circular, elliptical, trapezoidal, anchor-shaped or crescent-shaped.

6. The double sealing ring connector according to any one of claims 1-3, wherein, The connecting rod (201) has a shape that tapers as it extends; The side of the connecting rod (201) is curved.

7. The double sealing ring connector according to any one of claims 1-3, wherein, The spacing between the connector (200) and the locking boss (202) is 1 to 3 times the difference between the maximum length of the connector (200) in the direction perpendicular to the extension of the connecting rod (201) and the minimum length of the connecting rod (201) in the direction perpendicular to the extension of the connecting rod (201).

8. The double-sealing ring connector according to any one of claims 1-3, wherein, The first elastic sealing ring (1) and the second elastic sealing ring (2) are made of rubber and plastic materials with the same or different hardness.

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