Background
The quality of the pipe end groove of the pipeline pipe for oil and gas transmission directly influences the quality of a welding joint, and the quality of the welding joint is a key factor for determining construction and service safety. But the finished pipes are easy to be collided and impacted in the processes of storage, hoisting and transportation, and the use is influenced. In order to achieve protection of the pipe end, a pipe end protection cap is used. Patent CN201777518U discloses a "pipe end protective cap", which is installed inside the pipe end, and frictionally contacts with the inner diameter of the pipe through a snap ring, thus solving the problem of contact installation of the protective cap and the pipe end, and the contact is firm; the use of the line pipe end protective cap in this patent presents several problems: 1. the protective cap is designed by the inner diameter of the snap ring and the inner diameter of the pipe through friction, and the pipeline pipe is designed by matching the outer diameter of a standard specification with different wall thicknesses, so that the protective cap designed according to the inner diameter is inconvenient to use; the protective cap designed in the patent can only be used for the same inner diameter and the same wall thickness, and if the wall thickness of the pipe is increased, the groove is easy to expose after the pipe is capped, so that the protective cap cannot play a role in protection; 2. the design of the brim part of the hat can not be well attached to the shape of the groove, a large gap exists, and the groove can not be well protected.
Therefore, based on the problems, the protective cap can protect the finished pipes with multiple specifications, which have the same outer diameter and a certain range of wall thickness, widens the range of the use specifications, brings convenience for field operation, and has an important practical significance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the easily-detached impact-resistant pipe end protective cap which can protect finished pipes with a plurality of specifications, the diameters of which are the same as each other, and the wall thickness of which is in a certain range, broadens the range of the use specifications and brings convenience for field operation.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
an easily detachable impact-resistant pipe end protective cap comprises a cap body; the cap body comprises a first annular cap wall and a second annular cap wall, the second annular cap wall is positioned on the inner side of the first annular cap wall and is concentrically arranged with the first annular cap wall, one end of the second annular cap wall is fixedly connected with the same side end of the first annular cap wall through a first connecting plate, and the other end of the second annular cap wall is fixedly provided with a cap sealing plate, so that the longitudinal section of the cap body is of a concave structure;
a plurality of clamping rings are fixedly arranged on the inner wall of the first annular cap wall in an annular mode, and a plurality of anti-collision ribs are fixedly arranged between the inner wall of the first annular cap wall and the outer wall of the second annular cap wall.
Furthermore, the cap closing plate is provided with at least one air hole.
Furthermore, the angle between the installation angle of the anti-collision rib and the horizontal direction is 25-40 degrees.
Further, the anti-collision ribs are evenly distributed along the circumferential direction.
Furthermore, at least one clamping block is arranged on the outer wall of the second annular cap wall.
The invention has the advantages and positive effects that:
(1) the invention solves the problem of firm combination by the frictional contact of the snap ring and the outer surface of the pipe end, and the inner diameter of the protective cap is less than or equal to the inner diameter of the pipe body, so that the same protective cap can be used for protecting multi-specification finished pipes with the same outer diameter and a certain wall thickness range, the use range of the protective cap is widened, and the field operation is convenient;
(2) the anti-collision ribs are arranged at the contact position of the protective cap and the groove and are evenly distributed along the circumferential direction, so that the impact buffering is added to the contact position of the groove, and the groove can be better protected from being damaged due to accidental strong impact.
Detailed Description
First, it should be noted that the specific structures, features, advantages, etc. of the present invention will be specifically described below by way of example, but all the descriptions are for illustrative purposes only and should not be construed as limiting the present invention in any way. Furthermore, any single feature described or implicit in any embodiment or any single feature shown or implicit in any drawing may still be combined or subtracted between any of the features (or equivalents thereof) to obtain still further embodiments of the invention that may not be directly mentioned herein. In addition, for the sake of simplicity, the same or similar features may be indicated in only one place in the same drawing.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and furthermore, the terms "comprises" and "having", and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The present invention will be described in detail with reference to the accompanying drawings.
Example 1
FIG. 1(a) is a top plan view of a protective cap provided in an embodiment of the present invention; FIG. 1(b) is a cross-sectional structural view of a protective cap provided in an embodiment of the present invention; FIG. 1(c) is a bottom plan view of a protective cap provided in an embodiment of the present invention; as shown in the figures, the easy-to-detach impact-resistant pipe end protection cap provided by the embodiment includes a cap body 1; the cap body comprises a first annular cap wall 8 and a second annular cap wall 7, the second annular cap wall 7 is positioned on the inner side of the first annular cap wall 8 and is concentrically arranged with the first annular cap wall 8, one end of the second annular cap wall 7 is fixedly connected with the end of the first annular cap wall 8 on the same side through a first connecting plate, and the other end of the second annular cap wall 7 is fixedly provided with a cap sealing plate 6, so that the longitudinal section of the cap body 1 is of a concave structure;
the pipe end anti-collision cap is characterized in that a plurality of clamping rings 4 are fixedly arranged on the inner wall of the first annular cap wall 8 in an annular mode, a plurality of anti-collision ribs 5 are fixedly arranged between the inner wall of the first annular cap wall 8 and the outer wall of the second annular cap wall 7, the anti-collision ribs 5 are evenly distributed along the circumferential direction, the number of the anti-collision ribs can be adjusted according to the size of specifications, the angle control and the groove of the anti-collision ribs are attached, the angle between each anti-collision rib and the horizontal direction is 25-40 degrees, the groove part of the pipe end can be well protected through the design of the anti-collision ribs, and the pipe end is buffered when being strongly impacted, so that the pipe end is prevented from being damaged.
The cap closing plate 6 is provided with at least one air hole 3.
Specifically, the cap body 1 is designed according to the outer diameter of a finished product pipe, and is installed through the frictional contact of the snap ring 4 and the outer surface of the pipe end, so that firm combination is guaranteed, looseness is avoided, the protective cap is prevented from being damaged or loosened due to the effect of expansion with heat and contraction with cold, a sufficient distance is reserved between the first annular cap wall 8 and the second annular cap wall 7, the protective cap of the same specification can protect the specifications of the finished product pipe with the same outer diameter and multiple wall thickness ranges, the use range of the protective cap is expanded, the universality is improved, and the field operation is facilitated.
At least one clamping block 2 is arranged on the outer wall of the second annular cap wall 7, and a matched disassembling tool during disassembling is designed, as shown in fig. 2(a) and fig. 2(b), the clamping tool comprises a pull ring 9, a pull rod 10, an iron ring 11 and a clamping wing 12; two ends of the pull rod are respectively fixedly connected with the pull ring and the iron ring, and the clamping wings are arranged on the edge of the iron ring; in this embodiment, two clamping blocks 2 are provided, so as to increase the detaching force, the two clamping blocks 2 are symmetrically distributed, the total arc length of the two clamping blocks occupies half of the total arc length, the pull ring is held by hand, the clamping wings are aligned to the positions without the clamping blocks and extend in, then the pull ring is rotated by about 90 degrees, the clamping wings are aligned to the positions of the clamping blocks, and the protective cap can be detached by pulling outwards. The design of this protective cap fixture block and the collocation use of supporting instrument can effectively solve the dismantlement problem of protective cap, and the site operation is convenient, and is efficient.
The present invention has been described in detail with reference to the above examples, but the description is only for the preferred examples of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.