High-pressure union for petroleum manifold with long fatigue life

Abstract

The utility model relates to the technical field of high-pressure petroleum delivery manifolds, in particular to a high-pressure union for a long-fatigue-life petroleum manifold. Comprising a union female head, a union male head, a union nut, a plurality of pressure-bearing blocks, a sealing piece and a plug, the union nut is provided with a rectangular hole, the union female head is in butt joint with the union male head, the union female head is provided with threads, the union nut is movably connected with the union male head, the union male head is sleeved with the union nut, and the union nut is in threaded fit with the union female head. The plug is matched with the rectangular hole, the male union head is provided with an annular groove, the multiple pressure-bearing blocks are all matched with the annular groove, the female union head is further provided with a sealing groove, and the sealing piece is movably connected with the female union head and located in the sealing groove. And the sealing reliability is improved when the union male head and the union female head are assembled, and the service life is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum high pressure delivery pipe junction technical field especially relates to a high fatigue life high pressure by ren of petroleum pipe junction. BACKGROUND

[0002] By ren is a kind of used in petroleum drilling pipeline, fracturing truck and mining equipment to connect various pipe movable joint, also known as oil ren.

[0003] In prior art patent CN222392208U discloses a kind of high pressure by ren seal ring of spring skeleton, by ren nut is pressed by ren male head's transmission structure more by ren nut retainer (fan-shaped check ring), with by ren nut and by ren male head contact area is small when assembling, stress concentration is more, by ren overall strength is weak, leading to the short service life of this structure;In prior art patent CN221443594U discloses a kind of by ren of improved sealing structure, sealing groove of sealing assembly is more arranged in the outer ring of by ren male head close to by ren female head one end, sealing assembly is inconvenient to operate when installing and there is the risk of installation error, by ren male head and by ren female head when assembling, sealing assembly and by ren female head inner wall rub and slip in sealing groove, leading to unstable sealing performance;As described above, the fatigue strength of existing by ren nut and by ren overall durability are poor, the sealing performance of by ren male head and by ren female head is unstable, leading to lower service life. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of high fatigue life high pressure by ren of petroleum pipe junction, solve the fatigue strength of existing by ren nut and by ren overall durability are poor, the sealing performance of by ren male head and by ren female head is unstable, leading to lower service life Problem.

[0005] To achieve the above object, the utility model adopts a kind of high fatigue life high pressure by ren of petroleum pipe junction, including by ren female head, by ren male head, by ren nut, multiple pressure blocks, sealing element and plug, the by ren nut has rectangular hole, the by ren female head is butt joint with the by ren male head, the by ren female head has screw thread, the by ren nut is movably connected with the by ren male head, and is set on the outside of the by ren male head, and the by ren nut is threadedly matched with the by ren female head, the plug is compatible with the rectangular hole, the by ren male head has ring groove, multiple the pressure blocks are compatible with the ring groove, the by ren female head also has sealing groove, the sealing element is movably connected with the by ren female head and located in the sealing groove.

[0006] Among them, the high fatigue life high pressure by ren of petroleum pipe junction further includes multiple lugs, multiple the lugs are fixedly connected with the by ren nut, and are evenly distributed on the outer side wall of the by ren nut.

[0007] The high-pressure union further comprises a barb, the barb is fixedly connected with the union nut head and located in the sealing groove, and the barb is matched with the sealing element.

[0008] The high-pressure union for high fatigue life petroleum pipe junction of the utility model, in use, the sealing element is embedded in the sealing groove of the end face of the union nut head, the union nut is sleeved on the union head with the threaded end outward, the union head and the union nut head are connected in the center, the union nut and the union nut head are preliminarily fixed through the thread, when the union nut is screwed to a certain position, a plurality of pressure blocks are sequentially put into the rectangular hole of the union nut, the plurality of pressure blocks are uniformly distributed in the ring groove of the union head, the plug is installed in the rectangular hole to prevent foreign matters from falling in, the stress distribution is more uniform in work through the addition of the pressure blocks, in the above mode, the fatigue strength of the union nut and the overall durability of the union and the sealing reliability during the assembly of the union head and the union nut are improved, the service life is greatly prolonged, and the pressure blocks can be replaced without disassembling the overall structure, thereby saving maintenance time. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the drawings.

[0010] Fig. 1 It is the structure schematic diagram of the high-pressure union for high fatigue life petroleum pipe junction of the utility model.

[0011] Fig. 2 It is the structure schematic diagram of the high-pressure union for high fatigue life petroleum pipe junction of the utility model in the sealing state.

[0012] Fig. 3 It is the explosion schematic diagram of the high-pressure union for high fatigue life petroleum pipe junction of the utility model.

[0013] 1-union nut head, 2-union head, 3-union nut, 4-pressure block, 5-sealing element, 6-plug, 7-rectangular hole, 8-ring groove, 9-lug, 10-barb, 11-thread, 12-sealing groove. DETAILED DESCRIPTION

[0014] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein like reference numerals refer to like elements or elements with similar functions throughout the figures. The embodiments described below are exemplary in nature, and are intended to be illustrative of the present application rather than to limit the present application. Brief Description of the Drawings

[0015] Referring to Figs. 1-3 The utility model provides a kind of high fatigue life petroleum manifold high pressure union: including union female head 1, union male head 2, union nut 3, multiple pressure blocks 4, sealing element 5 and plug 6, the union nut 3 has rectangular hole 7, the union female head 1 with the union male head 2 butt joint, the union female head 1 has thread 11, the union nut 3 with the union male head 2 movably connected, and it is set in the outside of the union male head 2, and the union nut 3 with the union female head 1 thread 11 cooperation, the plug 6 is compatible with the rectangular hole 7, the union male head 2 has ring groove 8, multiple the pressure block 4 is compatible with the ring groove 8, the union female head 1 also has sealing groove 12, the sealing element 5 with the union female head 1 movably connected, and located in the sealing groove 12.

[0016] In the embodiment, when using, the sealing element 5 is embedded in the sealing groove 12 of the end surface of the union female head 1, and then the union nut 3 is ringed on the union male head 2 with the thread 11 end facing outward, the union male head 2 and the union female head 1 are connected in center, and are preliminarily fixed by the thread 11 of the union nut 3 and the union female head 1. At this time, when the union nut 3 is screwed to a certain position, a plurality of pressure blocks 4 are sequentially placed from the rectangular hole 7 opened above the union nut 3, so that the plurality of pressure blocks 4 are uniformly distributed in the ring groove 8 of the union male head 2, and then the union nut 3 is completely screwed and fixed, and the plug 6 is installed in the rectangular hole 7 to prevent foreign matter from falling in. By adding the pressure blocks 4, the stress distribution is more uniform in work. In the above manner, the fatigue strength of the union nut 3 and the overall durability of the union, as well as the sealing reliability during assembly of the union male head 2 and the union female head 1, are improved, the service life is greatly prolonged, and the pressure blocks 4 can be replaced without disassembling the overall structure, thereby saving maintenance time.

[0017] Further, the high fatigue life petroleum manifold high pressure union further includes a plurality of lugs 9, and the plurality of lugs 9 are fixedly connected to the union nut 3 and are uniformly distributed on the outer side wall of the union nut 3.

[0018] In the embodiment, the lug 9 is symmetrically arranged at the center of the two end faces of the nut 3, and the stress of the outer ring of the nut 3 is uniformly distributed without affecting the screwing function, so that the service life of the nut 3 is improved.

[0019] Further, the high fatigue life high-pressure union nut further comprises an inverted hook 10, the inverted hook 10 is fixedly connected with the nut head 1 and located in the sealing groove 12, and the inverted hook 10 is matched with the sealing element 5.

[0020] In the embodiment, the inverted hook 10 is integrally formed with the nut head 1, the sealing element 5 is embedded in the sealing groove 12 of the nut head 1, and the sealing element 5 is fixed and stabilized by the inverted hook 10.

[0021] The above only discloses a preferred embodiment of the utility model, and of course cannot limit the scope of the utility model, and those skilled in the art can understand that all or part of the above-mentioned embodiments can be implemented, and equivalent changes made according to the utility model claims still belong to the scope of the utility model.

Claims

1. A high-pressure union for oil manifolds with high fatigue life, characterized in that, The device includes a union head, a union male head, a union nut, multiple pressure blocks, a seal, and a plug. The union nut has a rectangular hole, and the union head mates with the union male head. The union head has threads, and the union nut is movably connected to the union male head and fitted onto the outside of the union male head. The union nut and the union head are threaded together. The plug is adapted to the rectangular hole. The union male head has an annular groove, and the multiple pressure blocks are adapted to the annular groove. The union head also has a sealing groove, and the seal is movably connected to the union head and located within the sealing groove.

2. The high-pressure union for high fatigue life oil manifolds as described in claim 1, characterized in that, The high-pressure union for high fatigue life oil manifolds also includes multiple lugs, which are fixedly connected to the union nut and are evenly distributed on the outer side wall of the union nut.

3. The high-pressure union for high fatigue life oil manifolds as described in claim 1, characterized in that, The high-pressure union for high fatigue life oil manifolds also includes a barb, which is fixedly connected to the union head and located in the sealing groove. The barb is also adapted to the sealing element.

Images