Sealing anti-loose pressure ring

Abstract

This invention relates to a pipe connection fitting, particularly a sealing anti-loosening pressure ring, comprising an anti-loosening ring and a rubber ring. The anti-loosening ring has a notch between its two ends, and its inner wall is provided with anti-slip textures or teeth. The outer wall of the anti-loosening ring has a first conical surface. The rubber ring comprises an upper ring body and a lower ring body. The outer wall of the upper ring body has a second conical surface, the second conical surface and the first conical surface having the same inclination direction. The lower ring body is located at the small-diameter end of the first conical surface and is tightly fitted to the corresponding end face of the anti-loosening ring. By covering the anti-loosening ring with a rubber ring, the sealing fitting and the anti-loosening fitting in the pipe joint can be combined into one, helping to reduce the number of fittings fitted onto the pipe. Sealing and anti-loosening can be achieved simultaneously with a single tightening action, resulting in relatively high assembly efficiency. Furthermore, there is no mutual interference problem, and the sealing and tightening effects are relatively good.

Description

Technical Field

[0001] This invention relates to a pipe connection fitting, and more particularly to a sealing anti-dislodgement ring. Background Technology

[0002] Water pipe networks typically use connectors to connect different pipes. To prevent leaks, sealing fittings, such as sealing rings, are usually installed in the connectors. At the same time, to ensure the connection is secure, anti-loosening fittings, such as locking rings, are also installed in the connectors.

[0003] Chinese invention patent application CN112413251A discloses a pipe connector, including a connecting sleeve and a pressure sleeve fitted on the pipe to be connected. The connecting sleeve and the pressure sleeve form a connection fit that restricts their axial separation. A locking ring and / or an elastic sealing ring are fitted on the pipe to be connected at the connection between the pressure sleeve and the connecting sleeve. When the pressure sleeve and the connecting sleeve move closer to each other, the locking ring and the elastic sealing ring form a mutual axial compression fit and radial deformation. The end of the connecting sleeve away from the pressure sleeve is connected to a pipe connector or pipe component. While this pipe connector can achieve the sealing and anti-detachment functions required in water network pipelines, it requires the sequential installation of multiple accessories such as elastic sealing rings, locking rings, and compression sleeves on the pipe during assembly, which affects assembly efficiency. Furthermore, since both the elastic sealing ring and the locking ring rely on the compression sleeve for compression sealing or locking, during the locking process, the elastic sealing ring may not be fully compressed while the locking ring is already firmly attached to the pipe and cannot move, resulting in insufficient sealing and leakage. Alternatively, the elastic sealing ring may be compressed to its limit and cannot be further compressed, while the locking ring has not yet moved to a position sufficient to secure the pipe, resulting in insufficient anti-detachment force and easy loosening.

[0004] To overcome the above problems, Chinese utility model patent CN216643394U discloses a pipe anti-detachment connector. Based on the above structure, the locking of the seal and the locking ring is divided into two tightenings to avoid the locking actions of the two interfering with each other and affecting the overall assembly. However, since it requires two tightenings, the assembly efficiency is relatively low, which is not conducive to the rapid networking or repair of pipelines.

[0005] In view of this, the applicant has conducted in-depth research on the above-mentioned issues, which led to this case. Summary of the Invention

[0006] The purpose of this invention is to provide a sealing anti-loosening pressure ring with relatively high assembly efficiency and relatively good sealing and locking effects.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A sealing anti-detachment pressure ring includes an anti-detachment ring with a notch formed between its two ends. The inner sidewall of the anti-detachment ring is provided with anti-slip textures or anti-slip teeth. The outer sidewall of the anti-detachment ring has a first conical surface. The ring also includes a rubber ring, which includes an upper ring body covering the outer peripheral sidewall of the anti-detachment ring and a lower ring body integrally connected to one end of the upper ring body. The outer sidewall of the upper ring body has a second conical surface at a position corresponding to the first conical surface. The second conical surface and the first conical surface have the same inclination direction. The lower ring body is located at the small diameter end of the first conical surface and is tightly attached to the corresponding end face of the anti-detachment ring.

[0009] As an improvement of the present invention, the outer wall of the lower ring body has a third conical surface with the same inclination direction as the second conical surface.

[0010] As an improvement of the present invention, at least one sealing ring is provided on the third conical surface.

[0011] As an improvement of the present invention, at least two sealing lips are provided on the inner sidewall of the lower ring body, arranged sequentially along the axial direction of the lower ring body, and the inner diameter of each sealing lip gradually decreases from the side relatively closer to the anti-detachment ring to the corresponding other side.

[0012] As an improvement of the present invention, each of the sealing lips is arranged to gradually tilt away from the anti-detachment ring from the side where it is connected to the lower ring body towards the corresponding other side.

[0013] As an improvement of the present invention, the end face of the anti-detachment ring facing the lower ring body is further abutted against a circular pressure plate, the circular pressure plate abutting against the end face of the lower ring body, or the circular pressure plate is embedded in the lower ring body.

[0014] As an improvement of the present invention, the anti-detachment ring is an integrated anti-detachment ring.

[0015] As an improvement of the present invention, the anti-detachment ring includes a plurality of anti-detachment blocks arranged in a ring shape. The inner sidewall of each anti-detachment block is provided with the anti-slip texture or the anti-slip teeth, and the outer sidewall of each anti-detachment block is provided with a first inclined guide surface. The first inclined guide surfaces together form the first conical surface. A movable groove is formed between two adjacent anti-detachment blocks, and the movable groove is filled with a rubber block integrally connected to the upper ring body.

[0016] As an improvement of the present invention, the movable groove is a V-shaped groove, a trapezoidal groove, or a square groove.

[0017] As an improvement of the present invention, the outer side wall of each of the anti-detachment blocks is also provided with a fourth inclined guide surface whose inclination direction is opposite to that of the corresponding first inclined guide surface. The third inclined guide surface is located on the side of the corresponding first inclined guide surface away from the lower ring body, and the fourth inclined guide surfaces together form a fourth conical surface.

[0018] As an improvement of the present invention, the outer side wall of the anti-detachment ring is further provided with a fourth conical surface whose inclination direction is opposite to that of the first conical surface, and the fourth conical surface is located on the side of the first conical surface away from the lower ring body.

[0019] As an improvement of the present invention, the anti-slip ring includes a plurality of annular plates stacked in sequence, and the inner sidewall of each annular plate is integrally connected with a plurality of anti-slip teeth that are arranged around the axis of the annular plate. The anti-slip teeth on two adjacent annular plates are arranged flush with each other or staggered with each other.

[0020] As an improvement of the present invention, the annular plate is a one-piece stamped plate.

[0021] As an improvement of the present invention, the annular plate includes a plurality of stamped sheets that are hinged in sequence.

[0022] As an improvement of the present invention, the annular plate includes stamped sheets arranged in sequence. One end of each stamped sheet is provided with a circular protrusion, and the other end is provided with an arc groove that mates with the circular protrusion. The circular protrusion is provided with a through hole. Each stamped sheet on each annular plate is arranged in a corresponding manner, and the circular protrusions of two adjacent stamped sheets are arranged in opposite directions.

[0023] As an improvement of the present invention, the same pin is inserted into each of the holes of each of the stamping sheets arranged correspondingly to each other and with the circular protrusions facing the same direction.

[0024] As an improvement of the present invention, each of the stamped pieces is embedded in the upper ring body.

[0025] By adopting the above technical solution, the present invention has the following beneficial effects:

[0026] 1. By wrapping the rubber ring around the anti-loosening ring, the sealing and anti-loosening components in the pipe joint can be combined into one, which helps to reduce the number of fittings on the pipe. Sealing and anti-loosening can be achieved simultaneously with only one tightening action, resulting in relatively high assembly efficiency. At the same time, since the anti-loosening ring is tightened at the same time as the rubber ring, there is no mutual interference problem, and the sealing and tightening effect is relatively good.

[0027] 2. By setting a sealing lip with a gradually changing inner diameter, it is not only easy to match with pipes of different diameters, making it applicable to a relatively wide range, but also helps to increase the sealing effect. In addition, it also has a certain degree of automatic centering capability.

[0028] 3. By setting a circular pressure plate, it helps to prevent water leakage from the lower ring of the rubber ring at the position corresponding to the notch due to lack of extrusion pressure, thus improving the sealing effect. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the sealing anti-dislodgement ring in Example 1;

[0030] Figure 2 This is a cross-sectional view of the sealing anti-loosening pressure ring in Example 1;

[0031] Figure 3 This is a schematic diagram of the sealing anti-loosening pressure ring in Example 2;

[0032] Figure 4 This is a cross-sectional view of the sealing anti-detachment pressure ring in Example 2, with the annular pressure plate omitted in the figure;

[0033] Figure 5 This is a schematic diagram of the sealing anti-loosening pressure ring in Example 3;

[0034] Figure 6 This is a cross-sectional view of the sealing anti-loosening pressure ring in Example 3;

[0035] Figure 7 This is a schematic diagram of the sealing anti-loosening pressure ring in Example 5;

[0036] Figure 8 This is a cross-sectional view of the sealing anti-loosening pressure ring in Example 5;

[0037] Figure 9 This is a schematic diagram of the sealing anti-dislodgement ring in Example 6;

[0038] Figure 10 This is a schematic diagram of the sealing anti-dislodgement ring in Example 8;

[0039] Figure 11 This is a cross-sectional view of the sealing anti-loosening pressure ring in Example 8;

[0040] Figure 12 This is an exploded structural diagram of the sealing anti-loosening pressure ring in Example 8.

[0041] The corresponding markings in the diagram are as follows:

[0042] 10-Anti-detachment ring; 11-Anti-slip teeth;

[0043] 12-Anti-detachment block; 13-Ring plate;

[0044] 14-Stamped sheet; 15-Circular protrusion;

[0045] 16-Circular groove; 17-Perforation;

[0046] 18 - Cage; 20 - Rubber ring;

[0047] 21-Upper ring body; 22-Lower ring body;

[0048] 23 - Rubber block; 30 - Circular pressure plate;

[0049] 31 - Second conical surface; 32 - Third conical surface;

[0050] 33-Sealing lip; 34-Fifth conical surface;

[0051] 35 - Sealing ring. Detailed Implementation

[0052] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0053] Example 1.

[0054] This embodiment provides a sealing anti-disengagement pressure ring, which is one of the accessories of the pipe connection joint. It is mainly used to achieve sealing and anti-disengagement between the pipe and the joint. The pipe connection joint that cooperates with it needs to have a valve body (also called a connecting sleeve) and a pressure cap. The valve body needs to have a socket countersunk hole for the sealing anti-disengagement pressure ring provided in this embodiment to pass through. The socket countersunk hole needs to have at least one first conical extrusion surface. The valve body and pressure cap are conventional pipe connection joint accessories and have been widely used in various pipe connection joints. For example, the joint body and pressure cap used in the anti-disengagement pipe joint disclosed in Chinese Utility Model Patent No. CN216715490U can be used as the valve body and pressure cap that cooperate with this embodiment, or the connecting sleeve and pressure sleeve used in the anti-disengagement connector of the pipe disclosed in Chinese Utility Model Patent No. CN216643394U can be used as the valve body and pressure cap that cooperate with this embodiment. Details will not be described here.

[0055] like Figure 1 and Figure 2As shown, the sealing anti-detachment pressure ring provided in this embodiment includes a metal anti-detachment ring 10 and a rubber ring 20. The anti-detachment ring 10 is an integral anti-detachment ring with a notch formed between its two ends, that is, the anti-detachment ring 10 is a C-shaped ring with an opening. The inner sidewall of the anti-detachment ring 10 is provided with anti-slip textures or anti-slip teeth 11. In this embodiment, the anti-detachment ring 10 is provided with anti-slip teeth 11 as an example for explanation. At the same time, the outer sidewall of the anti-detachment ring 10 has a first conical surface. The anti-detachment ring 10 with the above structure is a conventional anti-detachment ring. For example, the anti-detachment ring used in the anti-detachment pipe joint disclosed in Chinese Utility Model Patent No. CN216715490U can be used as the anti-detachment ring 10.

[0056] The rubber ring 20 includes an upper ring body 21 covering the outer peripheral sidewall of the anti-detachment ring 10 and a lower ring body 22 integrally connected to one end of the upper ring body 21. The anti-detachment ring 10, the upper ring body 21, and the lower ring body 22 are arranged coaxially. It should be noted that the "upper" and "lower" in "upper ring body 21" and "lower ring body 22" do not refer to actual up and down positions, but are only used to distinguish the two ring bodies. In actual use, the upper ring body 21 may be located below the lower ring body 22, or the two ring bodies may be arranged side to side, depending on the actual application scenario. The upper ring body 21 may only cover the outer sidewall of the anti-detachment ring 21, or it may cover all the outer surfaces of the anti-detachment ring 21 except for the inner sidewall. When manufacturing the sealing anti-detachment pressure ring of this embodiment, the anti-detachment ring 10 is first processed, and then the rubber ring 20 covering the anti-detachment ring 10 is formed by injection molding using the anti-detachment ring 10 as an insert.

[0057] The outer wall of the upper ring 21 has a second conical surface 31 at a position corresponding to the first conical surface. The second conical surface and the first conical surface have the same inclination direction. Thus, during use, the force applied to the second conical surface 31 not only compresses the upper ring 21 to achieve a positional seal, but also pushes the anti-detachment ring to grip the pipe to prevent detachment. It should be noted that, in this embodiment, the same inclination direction of the conical surfaces means that the orientation of the small diameter end and the large diameter end of the conical surface are the same, and the opposite inclination direction of the conical surfaces means that the orientation of the small diameter end of one conical surface is the same as the orientation of the large diameter end of the other conical surface.

[0058] The lower ring 22 is located at the small-diameter end of the first conical surface and is tightly attached to the corresponding end face of the anti-detachment ring 10. Preferably, the outer wall of the lower ring 22 has a third conical surface 32 with the same inclination direction as the second conical surface 31. The major diameter of the third conical surface 32 is less than or equal to the minor diameter of the second conical surface, and at least one sealing ring 35 coaxially arranged with the lower ring 22 is provided on the third conical surface 32. It should be noted that the socket countersink of the valve body (which is not part of this embodiment and needs to be configured separately during use) that cooperates with the sealing anti-detachment pressure ring with the third conical surface 32 is preferably provided with a second conical extrusion surface that cooperates with the third conical surface 32. This allows radial pressure to be applied to the lower ring 22 through the cooperation of the second conical extrusion surface and the third conical surface 32 during use, thereby further improving the sealing effect. Of course, even if the socket countersink does not have a second conical extrusion surface, it will not affect normal use. Furthermore, at least two sealing lips 33 are arranged sequentially along the axial direction of the lower ring 22 on the inner wall of the lower ring 22. The inner diameter of each sealing lip 33 gradually decreases from the side relatively closer to the anti-detachment ring 10 to the opposite side, which ensures a good seal even if there is a relatively large error in the outer diameter of the pipe. In addition, each sealing lip 33 is arranged at an angle gradually away from the anti-detachment ring 10 from the side connected to the lower ring 22 to the opposite side, which helps to further improve the sealing effect.

[0059] Because the lower ring 22 lacks axial support at the notch position of the anti-detachment ring 10, leakage is likely to occur at the position corresponding to the notch when the water pressure is too high. Preferably, the end face of the anti-detachment ring 10 facing the lower ring 22 is also abutted by a circular pressure plate 30. The inner diameter of the circular pressure plate 30 is larger than the inner diameter of the anti-slip tooth 11 or larger than the inner diameter of the anti-detachment ring 10 to avoid affecting the pipeline installation. At the same time, the circular pressure plate 30 abuts against the end face of the lower ring 22, or the circular pressure plate 30 is embedded in the lower ring 22. In this embodiment, a trumpet-shaped countersunk hole is provided at the opening position of the inner hole of the lower ring 22 facing the anti-detachment ring 10, and the circular pressure plate 30 is located in the trumpet-shaped countersunk hole. This not only facilitates assembly, but also allows the axial pressure applied by the anti-detachment ring 10 to the circular pressure plate 30 to be partially decomposed into radial pressure by the trumpet-shaped countersunk hole, thereby improving the sealing effect.

[0060] In use, the pipe is inserted into the valve body (the valve body is not part of this embodiment), and the gland and the sealing anti-dislodgement pressure ring provided in this embodiment are fitted onto the pipe. By locking the gland and the valve body together, the gland presses the sealing anti-dislodgement pressure ring onto the valve body, so that the second conical surface 31 presses against the first conical extrusion surface. If the valve body has a second conical extrusion surface, the third conical surface 32 presses against the second conical extrusion surface at the same time, thereby achieving a sealing and anti-dislodgement fastening connection between the pipe and the valve body.

[0061] Example 2.

[0062] like Figure 3 and Figure 4 As shown, the difference between the sealing anti-detachment pressure ring provided in this embodiment and that in Embodiment 1 lies in the different structure of the anti-detachment ring 10. In this embodiment, the anti-detachment ring 10 includes multiple anti-detachment blocks 12 arranged in a ring. The inner sidewall of each anti-detachment block 12 is provided with anti-slip textures or anti-slip teeth 11, and the outer sidewall of each anti-detachment block 12 is provided with a first inclined guide surface. The first inclined guide surfaces together form a first conical surface. A movable groove is formed between two adjacent anti-detachment blocks 12. The movable groove can be a V-shaped groove, a trapezoidal groove, or a square groove. In this embodiment, a V-shaped groove is used as an example for explanation. The movable groove is filled with a rubber block 23 integrally connected to the upper ring body 21. During production, multiple anti-detachment blocks 12 arranged in a ring are placed into the injection mold as inserts. Through insert injection molding, the rubber covers each anti-detachment block 12 and fills each movable groove, realizing the integral connection between the rubber block 23 and the upper ring body 21.

[0063] It should be noted that in this embodiment, the side of each anti-detachment block 12 facing the central axis of the anti-detachment ring 10 is the inner side of each anti-detachment block 12, and the side of each anti-detachment block 12 facing away from the central axis of the anti-detachment ring 10 is the outer side of each anti-detachment block 12. That is, the inner and outer sides of the anti-detachment block 12 are defined in the same way as the inner and outer sides of the anti-detachment ring 10.

[0064] The anti-detachment ring 10 used in this embodiment has good deformation ability and good sealing and anti-detachment performance for pipes with relatively poor roundness (such as pipes with elliptical cross-section). Moreover, each anti-detachment block 12 does not need to be spliced ​​on site and does not need to change the on-site assembly method. At the same time, the presence of the rubber block 23 can also ensure good synergy between each anti-detachment block 12.

[0065] Example 3.

[0066] like Figure 5 and Figure 6 As shown, the difference between the sealing anti-detachment pressure ring embodiment two provided in this embodiment is that the movable groove in this embodiment is a square groove, and the outer wall of each anti-detachment block 12 is also provided with a fourth inclined guide surface whose inclination direction is opposite to the first inclined guide surface on the corresponding anti-detachment block 12. The fourth inclined guide surface is located on the side of the first inclined guide surface of the corresponding anti-detachment block 12 away from the lower ring body 22. The fourth inclined guide surfaces together form a fourth conical surface. Of course, the outer wall of the upper ring body 21 has a fifth conical surface 34 at the position corresponding to the fourth conical surface. In this way, when in use, the pressure cap can be pressed on the fifth conical surface 34 to apply radial pressure to the anti-detachment ring 10, thereby further improving the anti-detachment effect.

[0067] It should be noted that in this embodiment, the inner and outer sides of each anti-detachment block 12 are defined in the same way as in embodiment two.

[0068] Example 4.

[0069] refer to Figure 6 As shown, the difference between the sealing anti-detachment pressure ring provided in this embodiment and that in Embodiment 1 is that the outer wall of the anti-detachment ring 10 in this embodiment is also provided with a fourth conical surface whose inclination direction is opposite to that of the first conical surface. The fourth conical surface is located on the side of the first conical surface away from the lower ring body 21. Of course, the outer wall of the upper ring body 21 has a fifth conical surface 34 at a position corresponding to the fourth conical surface. In this way, during use, the pressure cap can be pressed against the fifth conical surface 34 to apply radial pressure to the anti-detachment ring 10, further improving the anti-detachment effect.

[0070] Example 5.

[0071] like Figure 7 and Figure 8 As shown, the difference between the sealing anti-detachment pressure ring provided in this embodiment and that in Embodiment 1 or Embodiment 4 lies in the different structure of the anti-detachment ring 10. In this embodiment, the anti-detachment ring 10 includes multiple annular plates 13 stacked sequentially. The inner sidewall of each annular plate 13 is integrally connected with multiple anti-slip teeth 11 that are centered on the axis of the annular plate 13. In this way, the annular plate 13 can be obtained by sheet metal stamping, that is, the annular plate 13 is an integral stamping plate, which does not require casting and machining. Moreover, the thickness of the anti-detachment ring 10 can be selected for insert injection molding according to actual needs, which greatly reduces the production cost.

[0072] In addition, the anti-slip teeth 11 on the two adjacent annular plates 13 are staggered.

[0073] Example 6.

[0074] like Figure 9 As shown, the difference between the sealing anti-loosening pressure ring provided in this embodiment and that in embodiment five is that, in this embodiment, the anti-slip teeth 11 on two adjacent annular plates 13 are arranged flush with each other, that is, the number and position of the anti-slip teeth 11 on each annular plate 13 are the same. This helps to further reduce production costs.

[0075] Example 7.

[0076] The difference between the sealing anti-loosening pressure ring provided in this embodiment and that in Embodiment Six is ​​that, in this embodiment, the annular plate 13 (refer to...) Figure 6 As shown, it includes multiple stamped plates that are hinged in sequence. This way, only the stamped plates need to be prepared during production preparation, without the need to prepare annular plates 13 of different specifications according to different specifications of sealing anti-dislodgement rings. This helps to reduce raw material inventory and thus reduce production costs. At the same time, it also helps to further increase the deformation capacity of annular plates 13 to adapt to pipes that are deformed under external forces due to long-term use.

[0077] Example 8.

[0078] like Figures 10-12 As shown, the difference between the sealing anti-loosening pressure ring provided in this embodiment and that in embodiment six is ​​that, in this embodiment, the annular plate 13 includes stamped pieces 14 arranged in a ring. Unlike embodiment seven, two adjacent stamped pieces 14 in the same annular plate 13 can abut against each other, but there is no hinge or fixed connection.

[0079] One end of the stamping sheet 14 is provided with a circular protrusion 15, and the other end is provided with an arc groove 16 that mates with the circular protrusion. In two adjacent stamping sheets 14 of the same annular plate 13, the circular protrusion 15 of one stamping sheet 14 is inserted into the arc groove 16 of the other stamping sheet 14 to form a limiting structure. In addition, each circular protrusion is provided with a through hole 17.

[0080] In the same sealing anti-disengagement pressure ring, each stamped piece 14 on each annular plate 13 is arranged in a corresponding manner, and the stamped pieces 14 arranged in a corresponding manner are arranged in a straight line along the axial direction of the sealing anti-disengagement pressure ring; the circular protrusions 15 of two adjacent stamped pieces 14 are arranged in a corresponding manner and face opposite directions, which helps to improve the overall mechanical performance of the sealing anti-disengagement ring.

[0081] Preferably, in this embodiment, the same pin (not shown in the figure) is inserted into each of the through holes 17 of the correspondingly arranged circular protrusions 15 facing the same direction. This facilitates the positioning of the annular plate 13 in the injection mold during insert injection molding and also helps to prevent the corresponding stamping pieces 14 from misaligning. Of course, each pin is covered by the upper ring body 21. It should be noted that the pins are not necessary and can be omitted. In this case, during insert injection molding, the rubber material flows into the through holes 17 to form a rubber column integrally connected with the upper ring body 21.

[0082] Preferably, each stamped piece 14 is embedded in the upper ring body 21. Specifically, there is a gap between the corresponding stamped pieces 14. During the injection molding of the insert, the rubber material flows into the gap between the stamped pieces 14 to form a retainer 18 that is integrally connected with the upper ring body 21 (for easy distinction, the retainer 18 and the upper ring body 21 are separated in the attached figure). This helps to improve the connection between the anti-detachment ring and the rubber ring 20.

[0083] The present invention has been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the above embodiments. Those skilled in the art can make various modifications to the present invention based on the prior art, and these modifications all fall within the protection scope of the present invention.

Claims

1. A seal anti-loosening pressure ring, comprising an anti-loosening ring, a notch is formed between the head and tail of the anti-loosening ring, an anti-skid pattern or anti-skid tooth is arranged on the inner side wall of the anti-loosening ring, and the outer side wall of the anti-loosening ring has a first tapered surface, characterized in that, The rubber ring comprises an upper ring body wrapped on the outer circumferential wall of the anti-off ring and a lower ring body integrally connected to one end of the upper ring body, the outer wall of the upper ring body has a second tapered surface at a position corresponding to the first tapered surface, the second tapered surface and the first tapered surface have the same inclination direction, the lower ring body is located at the small-diameter end of the first tapered surface and abuts against the corresponding end surface of the anti-off ring, the upper ring body is wrapped on the outer wall of the anti-off ring only or all the outer surfaces of the anti-off ring except the inner wall, the lower ring body has no axial support at the notch position of the anti-off ring, and the end surface of the anti-off ring towards the lower ring body further abuts against a circular ring-shaped pressing plate which abuts against the end surface of the lower ring body or is embedded in the lower ring body.

2. The sealant anti-backout washer of claim 1, wherein, The outer wall of the lower ring body has a third tapered surface with the same inclination direction as the second tapered surface.

3. The sealant anti-backout washer of claim 2, wherein, At least one sealing ring is arranged on the third tapered surface.

4. The sealant anti-backout washer of claim 1 wherein, The inner wall of the lower ring body is provided with at least two sealing lips arranged in sequence along the axis direction of the lower ring body, and the inner diameter of each sealing lip gradually decreases from one side close to the anti-off ring to the other side.

5. The sealant anti-backout washer of claim 4 wherein, Each sealing lip is arranged to incline away from the anti-off ring from one side connected to the lower ring body to the other side.

6. The sealant anti-back-off pressure circle according to any one of claims 1-5, wherein, The anti-off ring is an integral anti-off ring.

7. The sealant anti-back-off pressure circle according to any one of claims 1-5, wherein, The anti-off ring comprises a plurality of annular anti-off blocks arranged in sequence, the inner wall of each anti-off block is provided with the anti-slip pattern or the anti-slip teeth, the outer wall of each anti-off block is provided with a first inclined guide surface, the first inclined guide surfaces collectively form the first tapered surface, an active groove is formed between two adjacent anti-off blocks, and the active groove is filled with a rubber block integrally connected with the upper ring body.

8. The sealant anti-backout washer of claim 7 wherein, The active groove is a V-shaped groove, a trapezoidal groove or a square groove.

9. The sealant anti-backout washer of claim 7 wherein, The outer wall of each anti-off block is further provided with a fourth inclined guide surface with an inclination direction opposite to the corresponding first inclined guide surface, the fourth inclined guide surface is located on the side of the corresponding first inclined guide surface away from the lower ring body, and the fourth inclined guide surfaces collectively form a fourth tapered surface.

10. The sealant anti-backout washer of claim 1 wherein, The outer wall of the anti-off ring is further provided with a fourth tapered surface with an inclination direction opposite to the first tapered surface, and the fourth tapered surface is located on the side of the first tapered surface away from the lower ring body.

11. The sealant anti-back-off pressure circle according to any one of claims 1-5 and 10, wherein, The anti-off ring comprises a plurality of annular plates stacked in sequence, and the inner wall of each annular plate is integrally connected with a plurality of anti-slip teeth arranged around the axis of the annular plate, and the anti-slip teeth on two adjacent annular plates are arranged in flush or staggered.

12. The sealant anti-backout washer of claim 11, wherein, The annular plate is an integral stamping plate.

13. The sealant anti-backout washer of claim 11 wherein, The annular plate comprises a plurality of stamping pieces hingedly connected in sequence.

14. The sealant anti-backout washer of claim 11 wherein, The annular plate comprises stamping pieces arranged in sequence, one end of each stamping piece is provided with a circular protrusion, the other end is provided with a circular arc groove matched with the circular protrusion, a through hole is formed in the circular protrusion, each stamping piece on each annular plate is arranged one by one, and the circular protrusions of two adjacent stamping pieces arranged in correspondence with each other face in opposite directions.

15. The sealant anti-backout washer of claim 14, wherein, The same pin is inserted into each of the perforations of each of the punching pieces which are arranged correspondingly and the round protrusions of which face the same direction.

16. The sealant anti-backout washer of claim 14, wherein, Each of the punching pieces is embedded in the upper ring body.

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