High-pressure-resistant assembly joint core tail

Abstract

The invention belongs to the technical field of hose assemblies, and particularly relates to a high-pressure-resistant assembly joint core tail. Comprising a core tail body, the core tail body comprises a connecting section and a connector section, a plurality of sealing grooves are formed in the outer arc side face of the connecting section of the core tail body in the axial direction, an O-shaped sealing ring and a memory alloy compensation ring are arranged in one sealing groove, and a glue injection hole is formed in the connector section of the core tail body. And a glue outlet hole is formed in each sealing groove, and a glue conveying hole channel formed in the side wall of the core tail body is connected between the glue injection hole and each glue outlet hole. The high-pressure-resistant assembly joint core tail has the advantages that the high-pressure-resistant assembly joint core tail has multiple sealing and anti-falling functions, and the sealing performance is stable.

Description

Technical Field

[0001] The present invention belongs to the technical field of hose assemblies, and particularly relates to a high-pressure resistant assembly joint core tail. Background Art

[0002] During the use of hydraulic hose assemblies under high pressure, liquid leakage, blasting, etc. occur at the joints, affecting the use and causing serious quality problems. In the prior art, the core tube uses a conventional core tail design. During the use of the assembly product, in a high-pressure working environment for a long time, the sealing performance of the core tail cannot meet the long-term high-pressure working conditions.

[0003] The invention patent with the patent number CN108223945A in the prior art discloses an air-conditioning hose assembly connection core, including a connection core body, a sealing ring, a pipe clamp, and an air-conditioning hose. The connection core body includes a limiting end, a connection end is arranged at the right end of the limiting end, two sealing ring grooves and two clamping grooves are arranged on the outer wall of the connection end, the structures of the two sealing ring grooves are the same, the structures of the two clamping grooves are the same, the two clamping grooves are on the left side of the two sealing ring grooves, and a through hole is transversely opened in the inner cavity of the connection core body. The present invention forms a sealing structure of an air-conditioning hose assembly by assembling and crimping four parts including a connection core body including a limiting end and a connection end, a sealing ring, an air-conditioning hose, and a pipe clamp. The new connection core structure achieves a higher sealing effect, improves the sealing performance of the air-conditioning hose assembly, reduces the leakage amount of the refrigerant, and reduces environmental pollution.

[0004] However, the structure of the connection core body of the above technology is relatively simple, and refrigerant leakage is still likely to occur in a high-pressure working environment for a long time, and the sealing performance of the core tail cannot meet the long-term high-pressure work.

[0005] Therefore, how to improve the sealing performance of the core tail under long-term high-pressure working conditions is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-pressure resistant assembly joint core tail, which has the advantage of maintaining stable sealing performance under long-term high-pressure working conditions through a multi-sealing and anti-disconnection structure design.

[0007] The technical solution of the present invention is as follows: A high-pressure resistant assembly joint core tail includes a core tail body. The core tail body includes a connection section and a joint section. A plurality of sealing grooves are axially formed on the outer arc side surface of the connection section of the core tail body. An O-ring seal and a shape memory alloy compensation ring are arranged in one of the sealing grooves. A glue injection hole is opened on the joint section of the core tail body, an out-glue hole is opened in each of the sealing grooves, and a glue delivery hole channel is arranged in the side wall of the core tail body and connects the glue injection hole and each out-glue hole.

[0008] One end of the connecting section of the core tail body, which is far away from the joint section, is formed with a sealing convex ring and an anti-backward convex ring. The cross-section of the anti-backward convex ring is a right triangle, and the outer diameter of the anti-backward convex ring is the same as the outer diameter of the sealing convex ring.

[0009] The cross-sectional profile of the sealing groove is an isosceles trapezoid structure.

[0010] At least three glue outlet holes are arranged in each of the sealing grooves. The three glue outlet holes are circumferentially and equally spaced along the axis of the core tail body in the corresponding sealing groove. The number of the glue injection holes is the same as the number of the glue outlet holes arranged in each sealing groove, and the glue injection holes are also circumferentially and equally spaced along the axis of the core tail body. Each glue injection hole in each orientation is connected to each glue outlet hole in the corresponding orientation by the same glue conveying hole channel.

[0011] The diameter of the glue outlet hole gradually increases from the direction close to the glue injection hole to the direction far away from the glue injection hole.

[0012] An inner tensile layer is arranged inside the core tail body, and the inner tensile layer is made of a glass fiber reinforced epoxy resin material.

[0013] One end of the joint section of the core tail body is formed with a connection port. An annular structural groove is formed in the connection port. The groove edge of the annular structural groove is formed with an inclined angle of 100°-110°. The end of the inner tensile layer extends to the annular structural groove. The maximum outer diameter of the annular structural groove is larger than the diameter of the connection port, and the diameter of the connection port is larger than the inner diameter of the core tail body.

[0014] A chamfer is arranged on the inner edge of the connection port at the end of the connecting section of the core tail body. The angle of the chamfer is 45°. One end of the inner tensile layer corresponding to the connection port is also provided with a 45° chamfer.

[0015] Convex teeth with a trapezoidal cross-section are formed between adjacent sealing grooves. A number of small top teeth are evenly distributed on the outer side surface of each convex tooth, and the small top teeth are in a conical structure.

[0016] The outer side of the end of the connecting section of the core tail body is in a frustum of a cone structure.

[0017] The beneficial effects of the present invention are as follows: By using the high-pressure-resistant assembly joint core tail of the present invention, when connecting with a hose, the hose is snapped onto the connecting section of the core tail body, and the O-ring seal provided in the sealing groove on the core tail body forms a seal between the core tail body and the hose. At the same time, when there is a seal leakage at the O-ring seal and the local pressure increases, the shape memory alloy compensation ring expands to compensate for the gap, ensuring that when leakage occurs after the hose assembly has been working for a long time, the gap can be automatically compensated to prevent leakage and extend the service life. At the same time, after the hose is sleeved on the core tail body, glue is injected into the glue injection hole. The glue is transmitted through the glue delivery hole channel to each glue outlet hole and discharged into the sealing groove to fill the sealing groove, forming a glue seal and playing an adhesive role at the same time, increasing the connection firmness between the hose and the core tail body. The double-sealing measures improve the sealing performance of the core tail under high-pressure working conditions for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic half-sectional view of the overall structure of a high-pressure-resistant assembly joint core tail provided by an embodiment of the present invention;

[0019] Figure 2 is Figure 1 an enlarged view of the structure of A in

[0020] Figure 3 is Figure 1 an enlarged view of the structure of B in

[0021] In the figure: 1 core tail body, 2 connecting section, 3 joint section, 4 sealing groove, 5 O-ring seal, 6 shape memory alloy compensation ring, 7 glue injection hole, 8 glue outlet hole, 9 glue delivery hole channel, 10 sealing protrusion ring, 11 anti-backward protrusion ring, 12 inner tensile layer, 13 annular structure groove, 14 convex tooth, 15 small top tooth. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following details the embodiments of the present application. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0023] The core of the present invention is to provide a high-pressure-resistant assembly joint core tail to improve the effective load of the high-pressure-resistant assembly joint core tail.

[0024] To enable those skilled in the art to better understand the technical solutions of the present invention, the following further details the present invention in conjunction with the drawings and embodiments.

[0025] Such as Figures 1-3As shown in the figure, a high-pressure-resistant assembly joint core tail includes a core tail body 1. The core tail body 1 includes a connecting section 2 and a joint section 3. Seven sealing grooves 4 are formed axially on the outer arc side surface of the connecting section 2 of the core tail body 1. An O-ring 5 and a shape memory alloy compensation ring 6 are arranged in one of the sealing grooves 4. The shape memory alloy compensation ring 6 is mainly made of nickel-titanium alloy. A glue injection hole 7 is formed on the joint section 3 of the core tail body 1. An out-glue hole 8 is formed in each sealing groove 4. A glue transmission hole channel 9 is arranged in the side wall of the core tail body 1 to connect the glue injection hole 7 and each out-glue hole 8. The glue used is a two-component epoxy resin glue.

[0026] The working process and principle of the above structure are as follows:

[0027] When connecting with a hose, the hose is clamped onto the connecting section 2 of the core tail body 1. The O-ring 5 arranged in the sealing groove 4 on the core tail body 1 forms a sealing effect between the core tail body 1 and the hose. At the same time, when there is a sealing leak at the O-ring 5 and the local pressure increases, the shape memory alloy compensation ring 6 compensates for the gap through its own expansion, ensuring that when the hose assembly leaks after long-term operation, it can automatically compensate for the gap, prevent leakage, and extend the service life. At the same time, after the hose is sleeved on the core tail body 1, glue is injected into the glue injection hole 7. The glue is transmitted through the glue transmission hole channel 9 to each out-glue hole 8 and discharged into the sealing groove 4 to fill the sealing groove 4, forming a glue seal and playing a bonding role at the same time, increasing the connection firmness between the hose and the core tail body 1. The double sealing measures improve the sealing performance of the core tail under long-term high-pressure working conditions.

[0028] As Figure 1 shown, in another embodiment of the present invention, a sealing protrusion ring 10 and an anti-backward protrusion ring 11 are formed at one end of the connecting section 2 of the core tail body 1 away from the joint section 3. The cross-section of the anti-backward protrusion ring 11 is a right triangle, and the outer diameter of the anti-backward protrusion ring 11 is the same as the outer diameter of the sealing protrusion ring 10.

[0029] The setting of the sealing protrusion ring 10 plays a mechanical hard-sealing effect through its hard structure. Since its outer diameter is larger than the outer diameter of the core tail body 1, it is convenient to closely fit with the hose to form a hard seal. The setting of the anti-backward protrusion ring 11 is mainly to prevent the hose from slipping backward. Through the setting of the structure of the anti-backward protrusion ring 11, it can play an anti-locking and locking role, increasing the friction force.

[0030] As Figure 1 shown, in another embodiment of the present invention, the cross-sectional profile of the sealing groove 4 is an isosceles trapezoid structure.

[0031] With this setting, the contact area between the sealing groove 4 and the glue is increased, expanding the sealing and bonding capabilities.

[0032] As Figure 1 shown, in another embodiment of the present invention, at least three glue outlet holes 8 are provided in each sealing groove 4. The three glue outlet holes 8 are circumferentially and equally spaced along the axis of the core tail body 1 in the corresponding sealing groove 4. The number of glue injection holes 7 is the same as the number of glue outlet holes 8 provided in each sealing groove 4, and the glue injection holes 7 are also circumferentially and equally spaced along the axis of the core tail body 1. A same glue conveying channel 9 is connected between the glue injection holes 7 in each orientation and each glue outlet hole 8 corresponding to that orientation.

[0033] The circumferential distribution of the glue outlet holes 8 and the glue injection holes 7 facilitates injecting glue into the sealing groove 4 synchronously from different orientations, with higher glue injection efficiency and more sufficient glue injection, preventing omission and voids and ensuring the overall sealing performance.

[0034] As Figure 1 shown, in another embodiment of the present invention, the diameter of the glue outlet hole 8 gradually increases from the direction close to the glue injection hole 7 to the direction far from the glue injection hole 7.

[0035] The diameter of the glue outlet hole 8 gradually increases from near to far, mainly facilitating the uniform diffusion of the glue liquid, preventing local solidification and blockage or uneven distribution of the glue liquid.

[0036] As Figure 1 shown, in another embodiment of the present invention, an inner tensile layer 12 is provided inside the core tail body 1. The inner tensile layer 12 is made of a glass fiber reinforced epoxy resin material. Glass fiber axial reinforcement members usually exist in the form of unidirectional or multi-axial (such as ±45°, 0° / +45° / -45°) woven fabrics, and achieve high-strength support in a specific direction through the directional arrangement of fibers; using glass fiber reinforced epoxy resin is corrosion-resistant and has a long service life.

[0037] The setting of the inner tensile layer 12 helps to improve the overall strength of the core tail body 1, and at the same time can improve the corrosion resistance of the inner wall of the core tail body 1 and extend its service life.

[0038] As Figure 1 shown, in another embodiment of the present invention, a connection port is formed at the end of the joint section 3 of the core tail body 1. An annular structural groove 13 is formed inside the connection port. The groove edge of the annular structural groove 13 has an inclination angle of 100° - 110°. The end of the inner tensile layer 12 extends to the annular structural groove 13. The maximum outer diameter of the annular structural groove 13 is greater than the diameter of the connection port, and the diameter of the connection port is greater than the inner diameter of the core tail body 1.

[0039] The provision of the annular structure groove 13, through the setting of the inclination angle of its groove edge, enables a certain temporary storage cavity to be retained when the connection port is connected to the external interface, allowing the annular structure groove 13 to play a role in temporarily storing liquid, thereby ensuring the continuity of liquid supply and significantly improving the performance of the joint. At the same time, the inclined groove edge is convenient for close fitting with the external interface, improving its sealing performance.

[0040] As Figure 1 shown, in another embodiment of the present invention, a chamfer is provided on the inner edge of the end connection port of the connection section 2 of the core tail body 1, and the angle of the chamfer is 45°. A 45° chamfer is also provided at one end of the inner tensile layer 12 corresponding to the connection port.

[0041] The provision of the chamfer at the connection port of the connection section 2 facilitates the easier diffusion of the liquid flowing out of the connection port and prevents excessive pressure impact. The structural setting of the inner tensile layer 12 facilitates cooperation with the chamfer of the core tail body 1.

[0042] As Figures 1-3 shown, in another embodiment of the present invention, a convex tooth 14 with a trapezoidal cross-section is formed between adjacent sealing grooves 4. Two rows of small top teeth 15 are evenly distributed on the outer side surface of each convex tooth 14, and the small top teeth 15 are in a conical structure.

[0043] The convex tooth 14 is automatically formed due to the provision of the sealing groove 4. The small top teeth 15 provided on the convex tooth 14 increase the friction force of the convex tooth 14 on the hose, preventing the hose from slipping. At the same time, the small gap left between the small top teeth 15 and the hose also facilitates the filling of glue, increasing the sealing contact area.

[0044] As Figure 1 shown, in another embodiment of the present invention, the outer side of the end of the connection section 2 of the core tail body 1 is in a frustum-shaped structure.

[0045] The structural setting of the frustum-shaped connection section 2 of the core tail body 1 facilitates the more easily alignment and sleeving of the hose.

Claims

1. A high-pressure resistant assembly joint core tail, characterized in that: It includes a core tail body, and the core tail body includes a connecting section and a joint section. A plurality of sealing grooves are formed axially on the outer arc side surface of the connecting section of the core tail body. An O-ring seal and a shape memory alloy compensating ring are arranged in one of the sealing grooves. A glue injection hole is formed on the joint section of the core tail body. An out-glue hole is formed in each of the sealing grooves. A glue conveying hole channel is formed in the side wall of the core tail body and connects the glue injection hole and each out-glue hole.

2. The high-pressure resistant assembly joint core tail according to claim 1, characterized in that: A sealing protrusion ring and an anti-backward protrusion ring are formed at one end of the connecting section of the core tail body away from the joint section. The cross-section of the anti-backward protrusion ring is a right triangle, and the outer diameter of the anti-backward protrusion ring is the same as the outer diameter of the sealing protrusion ring.

3. The high-pressure resistant assembly joint core tail according to claim 1, characterized in that: The cross-sectional profile of the sealing groove is an isosceles trapezoid structure.

4. A high-pressure resistant assembly joint core tail as described in claim 1, characterized in that: At least three out-glue holes are arranged in each of the sealing grooves. The three out-glue holes are circumferentially and equally spaced along the axis of the core tail body in the corresponding sealing groove. The number of the glue injection holes is the same as the number of the out-glue holes arranged in each sealing groove, and the glue injection holes are also circumferentially and equally spaced along the axis of the core tail body. The glue injection hole in each direction is connected to each out-glue hole in the corresponding direction by the same glue conveying hole channel.

5. The high-pressure resistant assembly joint core tail according to claim 1, characterized in that: The diameter of the out-glue hole gradually increases from the direction close to the glue injection hole to the direction away from the glue injection hole.

6. The high-pressure resistant assembly joint core tail according to claim 1, characterized in that: An inner tensile layer is arranged inside the core tail body, and the inner tensile layer is made of a glass fiber reinforced epoxy resin material.

7. A high-pressure resistant assembly joint core tail as described in claim 6, characterized in that: A connection port is formed at the end of the joint section of the core tail body. An annular structure groove is formed in the connection port. The groove edge of the annular structure groove has an inclination angle of 100° - 110°. The end of the inner tensile layer extends to the annular structure groove. The maximum outer diameter of the annular structure groove is larger than the diameter of the connection port, and the diameter of the connection port is larger than the inner diameter of the core tail body.

8. A high-pressure resistant assembly joint core tail as described in claim 6, characterized in that: A chamfer is arranged on the inner edge of the connection port at the end of the connecting section of the core tail body, and the angle of the chamfer is 45°. A 45° chamfer is also arranged at one end of the inner tensile layer corresponding to the connection port.

9. The high-pressure resistant assembly joint core tail according to claim 1, wherein: Convex teeth with a trapezoidal cross-section are formed between adjacent sealing grooves. A plurality of small top teeth are evenly distributed on the outer side surface of each convex tooth, and the small top teeth are in a conical structure.

10. A high-pressure resistant assembly joint core tail as described in claim 1, characterized in that: The outer side at the end of the connecting section of the core tail body is in a frustum-shaped structure.

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