CN-117341139-B - Petroleum pipeline nut, forming device and manufacturing method

Abstract

The application discloses a petroleum pipeline nut, a forming device and a manufacturing method, and relates to the field of nut manufacturing, comprising a nut body, a forming device and a forming device, wherein the nut body is provided with an internal threaded hole, and the peripheral surface of the nut body is provided with a groove; the nut comprises a nut body, a support cylinder, a plastic shell and a plastic shell, wherein one side of the opening of the support cylinder is connected with the nut body, the support cylinder is provided with an accommodating cavity, the accommodating cavity is communicated with the internal threaded hole, the accommodating cavity is used for accommodating a protruding portion of a bolt matched with the nut body, the plastic shell wraps the outer walls of the support cylinder and the nut body, one side of the internal threaded hole, which is opposite to the support cylinder, is exposed, and a protrusion matched with the groove is arranged on the plastic shell so as to be fixedly connected with the nut body. By adopting the technical scheme, the purpose of providing the corrosion-resistant petroleum pipeline nut is achieved.

Inventors

• QIAN HUIXIANG

Assignees

• 宁波东鑫高强度螺帽有限公司

Dates

Publication Date

20260508

Application Date

20231008

Claims (5)

1. 1. A petroleum pipeline nut forming device, comprising: An inner die (4), wherein the inner die (4) is cylindrical and provided with a containing cavity (21) and is used for being installed on the end face of the nut body (1) so that the containing cavity (21) is communicated with an inner threaded hole (11) of the nut body (1); The outer die (5) is cylindrical, one end of the opening of the outer die (5) is hexagonal prism-shaped, the outer die (5) is used for wrapping the outer sides of the inner die (4) and the nut body (1), an injection molding cavity (51) is formed between the outer die (5) and the inner die (4) and the nut body (1), and the injection molding cavity (51) is used for accommodating injection molding colloid; The device further comprises a clamping device (6), wherein a gap between the outer die (5) and one end of the inner die (4) with an opening forms an injection molding opening (511), and the clamping device (6) is provided with a force application part which is used for extending into the inner die (4) from the inner threaded hole (11) to fix the inner die (4) in the outer die (5); The clamping device (6) comprises: an inflation tube (61), wherein one end of the inflation tube (61) is connected with an inflation device (62), and the inflation tube (61) is used for penetrating through the internal threaded hole (11); The air bag is communicated with the air charging pipe (61), can penetrate through the internal threaded hole (11) in an uninflated state, is fixedly connected with one end of the air charging pipe (61) far away from the air charging equipment (62), and is used for fixing the inner die (4) in the outer die (5) in an inflated state; Or the clamping device (6) comprises: the mounting plate (63) is provided with a plurality of guide grooves (631) by taking the geometric center as an array, and the mounting plate (63) can pass through the internal threaded hole (11); A drive motor (64), the drive motor (64) having a drive shaft slidably disposed through the mounting plate (63); The driving gear (65), one end of the driving gear (65) far away from the driving motor (64) is fixedly connected with the driving shaft, and the mounting disc (63) of the driving gear (65) is rotationally connected; The driven gear (66) is meshed with the driving gear (65), the driven gear (66) is concentrically and rotatably connected with the mounting disc (63), the driven gear (66) is provided with a plurality of limit sliding grooves (661) by taking a tooth center as a reference array, the center of the driven gear (66) is provided with a reference circle, and the extending direction of the limit sliding grooves (661) is consistent with the involute direction of the reference circle; The guide blocks (67) are provided with guide columns (671), the guide columns (671) are in sliding fit with the limit sliding grooves (661), and the guide blocks (67) are clamped in the guide grooves (631) and are in sliding fit with the guide grooves (631); The driving shaft rotates to drive the driving gear (65) and the driven gear (66) to rotate, so that each guide block (67) is driven to slide along the guide groove (631).
2. 2. The petroleum pipeline nut forming device according to claim 1, wherein the outer die (5) is provided with an injection molding opening (511), the injection molding opening (511) is used for injecting injection molding colloid into the injection molding cavity (51), and the injection molding opening (511) is arranged at one end of the outer die (5) for plugging.
3. 3. A petroleum pipeline nut forming apparatus according to claim 2, characterized in that the outer mould tool (5) further comprises a feed pipe (52), the feed pipe (52) being in communication with the injection port (511).
4. 4. The petroleum pipeline nut forming device according to claim 1, further comprising a water cooling device (7), wherein the water cooling device (7) is arranged on the outer wall of the outer die (5).
5. 5. A method for manufacturing a petroleum pipeline nut, characterized by using the petroleum pipeline nut molding device as defined in any one of claims 1 to 4, comprising the steps of: Slotting, namely arranging a groove (12) for fastening on the peripheral wall of the nut body (1); placing a die, namely placing an inner die (4) on the end face of the nut body (1), and fixing the nut body (1) and the inner die (4) in an outer die (5) to form an injection cavity (51); injection molding, namely injecting injection molding colloid into an injection molding cavity (51); and (5) taking down the outer die (5), forming a plastic shell (3) after the injection molding colloid is cooled, and taking down the outer die (5).

Description

Petroleum pipeline nut, forming device and manufacturing method Technical Field The application relates to the field of nut manufacturing, in particular to a petroleum pipeline nut, a forming device and a manufacturing method. Background At present, with the increasing demand for petroleum resources, various petroleum transportation pipeline projects are increasing. Many petroleum pipelines can adopt underground construction, so that the transportation of petroleum resources is very convenient. However, the underground environment is complex, so that corrosion is easy to occur. Not only the pipeline equipment but also the parts of the connecting pipeline therein are corroded. The occurrence of corrosion can seriously affect the safety of pipeline use, and must be highly valued. When petroleum pipelines are constructed, a plastic protective sleeve is usually sleeved on the nut by the prior art for protecting the nut and the bolt. The plastic protective sleeve is generally corrosion resistant, and is sleeved on the nut after the nut is matched with the bolt. The bottom of the protective sleeve is generally hexagonal, and the top of the protective sleeve is semicircular or semi-elliptical which can accommodate bolts. But in actual installation, the protective sleeve is easy to fall off. In addition, each type of nut corresponds to a different protective sleeve. When the nut is installed, the protective sleeves are also required to be corresponding to the nuts one by one, and time is wasted. For this reason, there is an urgent need to produce a nut for petroleum pipelines that is corrosion resistant. Disclosure of Invention The application aims to provide a petroleum pipeline nut, a forming device and a manufacturing method. First aspect The application provides a petroleum pipeline nut, which comprises: The nut comprises a nut body, wherein the nut body is provided with an internal threaded hole, and the peripheral surface of the nut body is provided with a groove; The support cylinder is connected with the nut body at one side of the opening of the support cylinder, the support cylinder is provided with a containing cavity, the containing cavity is communicated with the internal threaded hole, and the containing cavity is used for containing a protruding part of a bolt matched with the nut body; The plastic shell wraps the outer wall of the supporting cylinder and the outer wall of the nut body, one side of the internal threaded hole, which is opposite to the supporting cylinder, is exposed, and the plastic shell is provided with a protrusion matched with the groove so as to be fixedly connected with the nut body. Through adopting above-mentioned technical scheme, wherein the support section of thick bamboo is shaping injection mold's inlayer, is connected with the plastic casing after moulding plastics, and the accommodation chamber of seting up can cover the bulge after bolt and nut body cooperation. The design of the supporting cylinder protects the threaded connection part of the bolt and the nut body, prevents oily substances and alkaline substances from corroding threads, and further prevents the joint of the nut body and the bolt from being rotten. The plastic shell is formed by pouring and cooling injection molding colloid, and is covered on the nut body after being molded. During injection molding, injection molding colloid also flows into the groove of the nut body. The plastic shell is formed by the plastic body in the groove, and the connection between the plastic shell and the nut body can be reinforced by matching the plastic shell with the groove of the nut body, so that the plastic shell is prevented from falling off. The plastic shell serves to protect the nut and bolt projections while being corrosion resistant compared to the nut. The plastic shell and the supporting cylinder cover the outer side of the nut, and then the corrosion-resistant petroleum pipeline nut is provided. Optionally, an annular groove is formed in one side, facing the supporting cylinder, of the nut body, the annular groove is coaxial with the internal threaded hole, and the supporting cylinder is clamped in the annular groove. By adopting the technical scheme, the support cylinder and the nut body do not need to be integrally produced. The support cylinder and the annular groove are matched in a clamping manner, and the support cylinders with different cylinder depths can be replaced to be matched with any nut body, so that the universality of the product is stronger. In addition, the annular groove can also play the effect of positioning the supporting cylinder, so that the supporting cylinder is positioned on the same axis relative to the internal threaded hole of the nut body, and the effect of conveniently producing the nut by injection molding is further realized. Second aspect The application provides a petroleum pipeline nut forming device, which comprises: the inner die is cylindrical and provided with a contai