CN113431977B

CN113431977B - Metal elbow joint

Info

Publication number: CN113431977B
Application number: CN202110877342.1A
Authority: CN
Inventors: 郑伟良; 郑康
Original assignee: Jiangsu Zhengtai Stainless Steel Industry Co ltd
Current assignee: Jiangsu Zhengtai Stainless Steel Industry Co ltd
Priority date: 2021-07-31
Filing date: 2021-07-31
Publication date: 2022-02-15
Anticipated expiration: 2041-07-31
Also published as: CN113431977A

Abstract

The invention discloses a metal elbow joint, belonging to the technical field of joints, the invention can utilize the characteristic that medium pressure on the bending part of an adapter pipe is larger by installing an inner expansion sealing ring on the bending part of the adapter pipe, not only can utilize a force dissipating ball and energy absorbing liquid to offset the medium pressure and absorb the stacked force dissipating balls to effectively disperse the medium pressure, reduce the impact of the medium and the bending part of the adapter pipe, can improve the service life of the adapter pipe, but also can generate compression deformation on the medium pressure, then utilizes the fluid property of the energy absorbing liquid to transfer, transfers to the inner expansion sealing ring at a threaded joint through a preset flow passage, and forces the inner expansion sealing ring to generate local expansion phenomenon, thereby efficiently sealing a connected pipeline, and the larger the medium pressure is, the better the sealing effect of the inner expansion sealing ring is, and the medium is difficult to generate leakage phenomenon, the mechanical strength and the sealing performance of the elbow joint can be effectively improved.

Description

Metal elbow joint

Technical Field

The invention relates to the technical field of joints, in particular to a metal elbow joint.

Background

The term hydraulic pressure refers to a part of a hydraulic system that connects a pipe or attaches a pipe to a hydraulic component, and is a generic term for a connector that can be attached and detached in a fluid passage.

The pipe joint is a connecting tool between a pipeline and a connecting point between an element and the pipeline, and can be disassembled and assembled. Plays an indispensable important role in the pipe fitting, which is one of the two main components of the hydraulic pipe. The pipe joint is used for straight line connection of instruments and the like, and the connection form is socket welding or threaded connection. The device is mainly used for low-pressure pipelines with small calibers, parts needing to be frequently assembled and disassembled or final adjustment of pipelines using threaded pipes. The structure form is preferably a metal surface contact sealing structure, and the gasket sealing structure form is usually used for general pipelines for conveying water, oil, air and the like and is made of malleable cast iron materials.

The frequently used elbow joint in the pipeline of metal pipeline, because the various working mediums transported in the pipeline are all under certain operating pressure, therefore the elbow also often all adopts metal to make. Such a metal elbow joint has a rigid structure and an extremely small amount of deformation, and therefore is widely used. Then the metal elbow joint among the prior art connects sealing performance relatively poor, the phenomenon of seepage appears easily, needs other measures to carry out the leak protection to the mechanical strength of joint is relatively poor, and life is lower, and the popularization degree of difficulty is big.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a metal elbow joint, which can utilize the characteristic that medium pressure on the bending part of an adapter pipe is larger by installing an inner expansion sealing ring on the bending part of the adapter pipe, not only can utilize a force dissipating ball and energy absorbing liquid to offset the medium pressure and absorb the stacked force dissipating balls to effectively disperse the medium pressure, reduce the impact of the medium on the bending part of the adapter pipe, can improve the service life of the adapter pipe, but also can generate compression deformation on the medium pressure, then utilizes the fluid property of the energy absorbing liquid to transfer, transfers to the inner expansion sealing ring at a screwed joint through a preset flow passage, forces the inner expansion sealing ring to generate local expansion phenomenon, thereby efficiently sealing the connected pipeline, and the larger the medium pressure is, the better the sealing effect of the inner expansion sealing ring is, the medium is less prone to leakage, and the mechanical strength and the sealing performance of the elbow joint can be effectively improved.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

The utility model provides a metal elbow, includes the switching pipe and installs in the screwed joint at switching pipe both ends, screwed joint the inner one side of keeping away from the switching pipe is inlayed and is connected with the internal expansion sealing washer, the inboard bend fixedly connected with shock ring of switching pipe, and shock ring hoop one side arch of keeping away from the switching inside pipe wall that shocks resistance, it has a plurality of evenly distributed's power ball to stack up in the shock ring, the intraductal runner that has many evenly distributed that has seted up of switching, the internal expansion sealing washer be close to shock ring one end peg graft have with runner assorted embedded pipe, and the runner is linked together with embedded pipe, the runner is close to shock ring one end opening part and inlays and be connected with the sepage hemisphere, a plurality of sepage holes have been seted up on the sepage hemisphere, it has energy-absorbing liquid all to fill in ring and the runner to shock ring.

Further, the ring of shocking resistance includes that outer pressure ring piece, a pair of tip ring piece and a pair of elasticity fill the ring, and is a pair of the tip ring piece is connected respectively in outer pressure ring piece both ends and with adapter tube inner wall fixed connection, elasticity fill ring fixed connection between adapter tube and tip ring piece, utilize the support limiting displacement of tip ring piece to outer pressure ring piece, force outer pressure ring piece can carry out stable deformation when receiving medium pressure, improve the extrusion effect to energy absorption liquid and suction ball on the one hand to can effectively disperse and absorb pressure, on the other hand can improve the life of outer pressure ring piece, the deformation of the injury nature is difficult for appearing.

Furthermore, the outer pressing ring piece and the end part ring piece are both made of elastic metal materials, the cross section of the outer pressing ring piece is arc-shaped, and the elastic filling ring is made of elastic rubber materials.

Further, scattered power ball becomes layer and a plurality of balanced bag including interior cavity ball, appearance, the appearance becomes the layer cladding in interior cavity ball surface, balanced bag evenly inlays in interior cavity ball and appearance and becomes between the layer, set up a plurality of through-holes that communicate with balanced bag on the interior cavity ball, receive the extrusion back at scattered power ball, the appearance becomes the layer and can carry out elastic deformation and satisfy the compression of outer pressure ring piece to after outer deformation layer part receives the extrusion, the balanced bag that corresponds also can compress, then remaining balanced bag is balanced the inflation to can effectively extrude the energy-absorbing liquid in the space between the scattered power ball, make the energy-absorbing liquid fully shift to expand in the interior inflation sealing washer, guarantee the sealed effect of interior inflation sealing washer.

Furthermore, interior hollow ball adopts hard material to make, the appearance becomes the layer and adopts elasticity hygroscopic material to make, and interior hollow ball has certain intensity to support, avoids appearing deformation damage, and the appearance becomes the layer and can absorb a certain amount of energy-absorbing liquid, even partial energy-absorbing liquid shifts to interior inflation sealing washer after, the appearance becomes the layer and still can absorb medium pressure.

Further, any one of gas, common liquid or energy absorption liquid is filled in the inner hollow ball and the balance bag.

Further, interior inflation sealing washer includes the seal ring body and a pair of protection piece ring, protection piece ring symmetric connection is in seal ring body both ends, and the seal ring body keeps unanimous with the inside and outside footpath of protection piece ring, and the protection piece ring plays the mechanical protection effect to the seal ring body on the one hand, avoids receiving external force to damage, and on the other hand can carry out the tip spacing to the inflation of seal ring body, forces its inflation to guarantee sealed effect in the direction of perpendicular pipeline.

Further, the annular gap is formed in the sealing ring body and communicated with the embedded pipe, the annular gap is closer to the inner surface of the sealing ring body, energy-absorbing liquid is transferred into the annular gap through the flow channel and the embedded pipe, the annular gap space is enlarged, the inner end face of the sealing ring body is fully expanded to seal the pipeline, the inner expansion sealing ring filled with the energy-absorbing liquid also has a good energy-absorbing effect, and the sealing ring is not prone to damage and deformation due to accidental stress.

Further, the internal piece of seal circle is inlayed and is connected with many evenly distributed's design silk, and design silk vertical distribution in the outside of annular seam, and the design silk can further improve the intensity of the seal circle body on the one hand, is difficult for appearing abnormal deformation, and on the other hand can restrict the inflation direction of annular seam, makes its abundant inboard inflation to improve sealed effect.

Furthermore, the energy-absorbing liquid is shear thickening liquid, is a nanoparticle solvent in a solid-liquid mixed state, can flow and transfer in a normal state, can be quickly hardened when impacted, disperses and absorbs the impact, and is restored to a liquid state after the impact disappears.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the scheme can not only utilize the scattered force balls and energy-absorbing liquid to offset the medium pressure and absorb the scattered force balls stacked in the scattered force balls to effectively disperse the medium pressure by mounting the inner expansion sealing ring at the bent part of the adapter tube and utilizing the characteristic that the bent part of the adapter tube is subjected to larger medium pressure, thereby reducing the impact of the medium and the bent part of the adapter tube, prolonging the service life of the adapter tube, simultaneously realizing the compression deformation of the medium pressure, then the fluid property of the energy-absorbing liquid is utilized for transferring, and the energy-absorbing liquid is transferred to an inner expansion sealing ring at the threaded joint through a preset flow passage to force the inner expansion sealing ring to have a local expansion phenomenon, thereby carry out high-efficient sealed to the pipeline of connecting, and medium pressure is big more, and the sealed effect of interior inflation sealing washer is better, and the medium is difficult to appear leaking the phenomenon on the contrary more, can effectively improve the mechanical strength and the leakproofness of elbow joint.

(2) The impact ring includes outer pressure ring piece, a pair of tip ring piece and a pair of elasticity packing ring, a pair of tip ring piece connect respectively in outer pressure ring piece both ends and with adapter tube inner wall fixed connection, elasticity packing ring fixed connection is between adapter tube and tip ring piece, utilize the support limiting displacement of tip ring piece to outer pressure ring piece, force outer pressure ring piece can carry out stable deformation when receiving medium pressure, improve the extrusion effect to can liquid and scattered power ball on the one hand, thereby can effectively disperse and absorb pressure, on the other hand can improve the life of outer pressure ring piece, the deformation of injury nature is difficult for appearing.

(3) Bulk force ball includes interior cavity ball, appearance change layer and a plurality of balanced bag, the cladding of appearance change layer is in interior cavity ball outer surface, balanced bag is evenly inlayed in interior cavity ball and appearance change between the layer, set up a plurality of through-holes that communicate with balanced bag on the interior cavity ball, receive the extrusion back at bulk force ball, the appearance changes the layer and can carry out elastic deformation and satisfy the compression of outer pressure ring piece, and receive the extrusion back in outer deformation layer part, corresponding balanced bag also can compress, then remaining balanced bag balances the inflation, thereby can effectively extrude the energy-absorbing liquid in the space between the bulk force ball, make energy-absorbing liquid expand in can fully shifting to interior inflation sealing washer, guarantee the sealed effect of interior inflation sealing washer.

(4) The inner expansion sealing ring comprises a sealing ring body and a pair of protection sheet rings, the protection sheet rings are symmetrically connected to two ends of the sealing ring body, the inner diameter and the outer diameter of the sealing ring body and the protection sheet rings are kept consistent, the protection sheet rings play a role in mechanical protection of the sealing ring body on one hand and avoid being damaged by external force, and on the other hand, end limiting can be carried out on expansion of the sealing ring body, so that the sealing effect is guaranteed by the expansion of the sealing ring body in the direction perpendicular to the pipeline.

(5) The annular seam has been seted up in the sealing washer body, and the annular seam is linked together with the embedded pipe, and the annular seam is nearer apart from the internal surface of sealing washer body, passes through the runner at energy-absorbing liquid, the embedded pipe shifts to in the annular seam for the annular seam space enlarges, makes the internal terminal surface of sealing washer fully expand and seals the pipeline, and the internal expanding sealing washer that is full of energy-absorbing liquid also can have good energy-absorbing effect, and difficult unexpected atress appears damaging the deformation.

(6) The internal setting silk that is connected with many evenly distributed of inlaying of sealing washer, and setting silk vertical distribution in the outside of annular gap, setting silk can further improve the intensity of the sealing washer body on the one hand, is difficult for appearing abnormal deformation, and on the other hand can restrict the inflation direction of annular gap, makes its abundant inboard inflation to improve sealed effect.

(7) The energy absorption liquid is shear thickening liquid, is a nano particle solvent in a solid-liquid mixed state, can flow and transfer in a normal state, can be quickly hardened when being impacted, disperses and absorbs the impact, and is restored to a liquid state after the impact disappears.

Drawings

FIG. 1 is an external view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of the impact ring of the present invention;

FIG. 4 is a schematic view of the structure at A in FIG. 3;

FIG. 5 is a cross-sectional view of a force dissipating ball of the present invention;

FIG. 6 is a schematic structural view of an inner expansion seal ring of the present invention;

FIG. 7 is a schematic structural view of the inner inflatable seal ring of the present invention before and after partial inflation;

fig. 8 is a schematic structural view of the impact resistant ring and the inner expansion seal ring before and after the change.

The reference numbers in the figures illustrate:

the sealing device comprises an adapter tube 1, a threaded joint 2, an inner expansion sealing ring 3, a sealing ring body 31, a protective sheet ring 32, a sizing wire 33, an impact resistant ring 4, an outer pressure ring 41, an end ring 42, an elastic filling ring 43, a flow channel 5, a force dispersing ball 6, a hollow ball 61, an outer shape changing layer 62, a balance bag 63, a liquid permeating hemisphere 7, an inner embedded tube 8 and an annular seam 9.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1-3, a metal elbow connector comprises an adapter tube 1 and screw thread connectors 2 installed at two ends of the adapter tube 1, wherein an inner expansion sealing ring 3 is embedded and connected at one side of the inner end of the screw thread connector 2 far from the adapter tube 1, an impact resistant ring 4 is fixedly connected at the inner side bending part of the adapter tube 1, the impact resistant ring 4 protrudes towards one side far from the inner wall of the adapter tube 1, a plurality of uniformly distributed force dispersing balls 6 are stacked in the impact resistant ring 4, a plurality of uniformly distributed flow passages 5 are arranged in the adapter tube 1, an embedded tube 8 matched with the flow passages 5 is inserted and connected at one end of the inner expansion sealing ring 3 close to the impact resistant ring 4, the flow passages 5 are communicated with the embedded tube 8, a liquid seepage hemisphere 7 is embedded and connected at an opening part at one end of the flow passage 5 close to the impact resistant ring 4, a plurality of liquid seepage holes are arranged on the liquid seepage hemisphere 7, the liquid seepage hemisphere 7 can prevent the deformed force dispersing balls 6 from completely sealing the flow passages 5, energy absorption liquid is filled in the impact resistant ring 4 and the flow passage 5.

Impact ring 4 includes outer pressure ring piece 41, a pair of tip ring piece 42 and a pair of elasticity packing ring 43, a pair of tip ring piece 42 connect respectively in outer pressure ring piece 41 both ends and with switching pipe 1 inner wall fixed connection, elasticity packing ring 43 fixed connection is between switching pipe 1 and tip ring piece 42, utilize tip ring piece 42 to the support limiting displacement of outer pressure ring piece 41, force outer pressure ring piece 41 can carry out stable deformation when receiving medium pressure, improve the extrusion effect to energy absorption liquid and scattered power ball 6 on the one hand, thereby can effectively disperse and absorb pressure, on the other hand can improve the life of outer pressure ring piece 41, the deformation of injury nature is difficult for appearing.

The outer pressure ring plate 41 and the end ring plate 42 are both made of elastic metal material, such as aluminum alloy material, the cross section of the outer pressure ring plate 41 is arc-shaped, and the elastic filling ring 43 is made of elastic rubber material.

Referring to fig. 5, the dissipating ball 6 includes an inner hollow ball 61, an outer shape changing layer 62 and a plurality of balance bags 63, the outer surface of the inner hollow ball 61 is covered by the outer shape changing layer 62, the balance bags 63 are uniformly embedded between the inner hollow ball 61 and the outer shape changing layer 62, a plurality of through holes communicated with the balance bags 63 are formed in the inner hollow ball 61, after the dissipating ball 6 is extruded, the outer shape changing layer 62 can be elastically deformed to meet the compression of the outer pressure ring sheet 41, and after the outer shape changing layer 62 is locally extruded, the corresponding balance bags 63 can be compressed, and then the rest balance bags 63 are expanded in a balanced manner, so that the energy absorbing liquid in the gap between the dissipating ball 6 can be effectively extruded, the energy absorbing liquid can be sufficiently transferred into the inner expansion sealing ring 3 to be expanded, and the sealing effect of the inner expansion sealing ring 3 can be ensured.

Interior hollow ball 61 adopts hard material to make, and appearance becomes layer 62 and adopts elasticity hygroscopic material to make, and interior hollow ball 61 has certain intensity to support, avoids appearing deformation damage, and appearance becomes layer 62 and can absorb a certain amount of energy-absorbing liquid, even partial energy-absorbing liquid shifts to interior inflation sealing washer 3 after, appearance becomes layer 62 still can absorb medium pressure.

The inner hollow ball 61 and the balance bag 63 are filled with any one of gas, ordinary liquid or energy-absorbing liquid, theoretically, the effect of filling the energy-absorbing liquid is the best, and technicians can select the liquid by themselves in consideration of the cost.

Referring to fig. 6, the inner expansion sealing ring 3 includes a sealing ring body 31 and a pair of protection ring rings 32, the protection ring rings 32 are symmetrically connected to two ends of the sealing ring body 31, and the inner and outer diameters of the sealing ring body 31 and the protection ring rings 32 are kept consistent, the protection ring rings 32, on one hand, play a role in mechanical protection of the sealing ring body 31 to avoid damage from external force, and on the other hand, can perform end position limitation on expansion of the sealing ring body 31 to force it to expand in a direction perpendicular to a pipeline to ensure a sealing effect.

Referring to fig. 7, an annular gap 9 is formed in the seal ring body 31, the annular gap 9 is communicated with the embedded pipe 8, the annular gap 9 is close to the inner surface of the seal ring body 31, and energy-absorbing liquid is transferred into the annular gap 9 through the flow channel 5 and the embedded pipe 8, so that the space of the annular gap 9 is enlarged, the inner end surface of the seal ring body 31 is fully expanded to seal the pipeline, the inner expansion seal ring 3 filled with the energy-absorbing liquid also has a good energy-absorbing effect, and the seal ring is not prone to damage and deformation due to accidental stress.

Inlay in the seal ring body 31 and be connected with many evenly distributed's design silk 33, and design silk 33 vertical distribution in the outside of annular seam 9, design silk 33 on the one hand can further improve the intensity of seal ring body 31, is difficult for appearing abnormal deformation, and on the other hand can restrict the inflation direction of annular seam 9, makes its abundant inboard inflation to improve sealed effect.

The energy absorption liquid is shear thickening liquid, is a nano particle solvent in a solid-liquid mixed state, can flow and transfer in a normal state, can be quickly hardened when being impacted, disperses and absorbs the impact, and is restored to a liquid state after the impact disappears.

In consideration of cost, the energy absorption liquid can be directly replaced by common liquid, such as water, and the force dissipation ball 6 can be replaced by a common rubber ball, but the energy absorption effect is reduced.

Referring to fig. 7-8, the invention can utilize the characteristic that the bending part of the adapter tube 1 is subjected to a large medium pressure by installing the inner expansion seal ring 3, not only can utilize the force dissipating balls 6 and the energy absorbing liquid to offset the medium pressure and absorb the stacked force dissipating balls 6 to effectively disperse the medium pressure, reduce the impact between the medium and the bending part of the adapter tube 1, can improve the service life of the adapter tube 1, but also can generate compression deformation at the medium pressure, then utilizes the fluid property of the energy absorbing liquid to transfer, transfers to the inner expansion seal ring 3 at the screwed joint 2 through the preset flow channel 5, forces the inner expansion seal ring 3 to generate a local expansion phenomenon, thereby efficiently sealing the connected pipelines, and the larger the medium pressure is, the better the sealing effect of the inner expansion seal ring 3 is, and the medium is less prone to leakage, the mechanical strength and the sealing performance of the elbow joint can be effectively improved.

The above are merely preferred embodiments of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a metal elbow connector, includes adapter tube (1) and installs in screwed joint (2) at adapter tube (1) both ends, its characterized in that: the inner end of the threaded connector (2) is far away from one side of the adapter tube (1) and is embedded and connected with an inner expansion sealing ring (3), an impact resistant ring (4) is fixedly connected to the inner side bending part of the adapter tube (1), the impact resistant ring (4) protrudes towards one side far away from the inner wall of the adapter tube (1), a plurality of uniformly distributed force dissipating balls (6) are stacked in the impact resistant ring (4), a plurality of uniformly distributed flow passages (5) are formed in the adapter tube (1), one end, close to the impact resistant ring (4), of the inner expansion sealing ring (3) is spliced with an embedded tube (8) matched with the flow passage (5), the flow passage (5) is communicated with the embedded tube (8), one end, close to the impact resistant ring (4), of the flow passage (5) is embedded with an opening connected with a liquid seepage hemisphere (7), a plurality of liquid seepage holes are formed in the liquid seepage hemisphere (7), and energy absorbing liquid is filled in the impact resistant ring (4) and the flow passage (5), the free-ranging ball (6) comprises an inner hollow ball (61), an appearance changing layer (62) and a plurality of balance bags (63), wherein the appearance changing layer (62) is coated on the outer surface of the inner hollow ball (61), the balance bags (63) are uniformly embedded between the inner hollow ball (61) and the appearance changing layer (62), a plurality of through holes communicated with the balance bags (63) are formed in the inner hollow ball (61), the inner hollow ball (61) is made of hard materials, and the appearance changing layer (62) is made of elastic moisture absorption materials.

2. The metal elbow connector as defined in claim 1, wherein: the shock-resistant ring (4) comprises an outer pressure ring piece (41), a pair of end ring pieces (42) and a pair of elastic filling rings (43), the end ring pieces (42) are connected to two ends of the outer pressure ring piece (41) respectively and fixedly connected with the inner wall of the adapter tube (1), and the elastic filling rings (43) are fixedly connected between the adapter tube (1) and the end ring pieces (42).

3. The metal elbow connector as defined in claim 2, wherein: the outer pressing ring piece (41) and the end part ring piece (42) are both made of elastic metal materials, the cross section of the outer pressing ring piece (41) is arc-shaped, and the elastic filling ring (43) is made of elastic rubber materials.

4. The metal elbow connector as defined in claim 1, wherein: the inner hollow ball (61) and the balance bag (63) are filled with any one of gas, common liquid or energy-absorbing liquid.

5. The metal elbow connector as defined in claim 1, wherein: the inner expansion sealing ring (3) comprises a sealing ring body (31) and a pair of protection sheet rings (32), the protection sheet rings (32) are symmetrically connected to two ends of the sealing ring body (31), and the inner diameter and the outer diameter of the sealing ring body (31) and the protection sheet rings (32) are kept consistent.

6. The metal elbow connector as defined in claim 5 wherein: annular gap (9) is arranged in the sealing ring body (31), the annular gap (9) is communicated with the embedded pipe (8), and the annular gap (9) is close to the inner surface of the sealing ring body (31).

7. The metal elbow connector as defined in claim 6 wherein: the seal ring is characterized in that a plurality of sizing wires (33) which are uniformly distributed are embedded in the seal ring body (31), and the sizing wires (33) are vertically distributed on the outer side of the annular gap (9).

8. The metal elbow connector as defined in claim 1, wherein: the energy absorbing liquid is a shear thickening liquid.