Specially used for loading and unloading device of oil casing protective cap

Abstract

The present invention provides a device for loading and unloading oil casing protective caps, including a straightening and fixing mechanism and a rotating tensioning mechanism; the straightening and fixing mechanism includes a clamping half-shell, a straightening half-shell and a connecting rod, and the clamping half-shell and the straightening half-shell are fixedly connected by at least two connecting rods, so that a closed structure is formed between the clamping half-shell, the straightening half-shell and the connecting rod; the rotating tensioning mechanism includes a rotating rod, and a tensioning convex surface is formed at one end of the rotating rod; the rotating rod is connected to the connecting rod, and the loading and unloading device is sleeved on the protective cap, and the rotating rod is rotated, so that the distance between the tensioning convex surface and the clamping half-shell is reduced, and finally the rotating force of the rotating rod acts on the protective cap through the tensioning convex surface and the clamping half-shell, so that the installation or removal of the protective cap is realized. The loading and unloading device of the present invention has a simple structure and is very convenient to use, which greatly improves the work efficiency of installing or removing the protective cap and reduces the intensity of physical labor.

Description

Technical Field

[0001] The invention relates to the technical field of loading and unloading tools, in particular to a loading and unloading device dedicated to oil casing protection caps. Background Art

[0002] During the manufacturing, use and thread maintenance of oil casing, it is necessary to install and remove threaded protective caps many times. At present, the operation of installing protective caps generally adopts manual screwing, using chain pliers or pipe pliers to tighten, and the operation of removing protective caps generally adopts chain pliers or pipe pliers to loosen, and manually unscrew and remove protective caps. These operations generally have disadvantages and risks. For example, there is a risk of damage and failure of protective caps: chain pliers and pipe pliers are non-special tools for installing and removing protective caps. When using chain pliers, the degree to which the chain of the chain pliers tightens the protective cap is uncertain. If the degree of tightening is too large, the protective cap will be deformed. On the contrary, if the degree of tightening is not enough, the protective cap cannot be effectively tightened or loosened. The relative sliding of the chain and the protective cap will tear the surface of the protective cap. When using a pipe clamp, the pipe clamp clamps the edge of the protective cap through the dislocation force. At the same time, the anti-skid working surface of the pipe clamp will cause damage to the surface of the protective cap. The damaged protective cap affects the overall appearance quality of the product. When it is severely damaged, the paint on the steel sleeve of the protective cap will fall off, exposing the metal of the protective cap sleeve, which is prone to rust. The plastic part of the protective cap is easily damaged during the clamping process, which will seriously affect the use effect of the protective cap. In addition, chain pliers and pipe pliers are generally made of cast iron and are relatively bulky. During use, they need to be adjusted and locked many times to make the chain or pipe clamp clamping mouth in a suitable clamping position, which is time-consuming and inefficient. Chain pliers and pipe pliers can only be used for the tightening and loosening process of the protective cap. The screwing process of the protective cap and the unscrewing process of the protective cap are basically completed manually by hand, which is physically labor-intensive and inefficient.

[0003] In view of these problems, the present invention provides a device specially used for loading and unloading protective caps of oil casings, which can solve the problem of long time consumption and high labor intensity in loading and unloading protective caps. The method of use is simple, and can effectively reduce physical labor intensity and improve work efficiency. Summary of the invention

[0004] The invention provides a device for loading and unloading a protective cap of an oil casing, comprising a straightening and fixing mechanism and a rotating tensioning mechanism;

[0005] The straightening and fixing mechanism comprises a clamping half-tile, a straightening half-tile and a connecting rod, wherein the clamping half-tile and the straightening half-tile are fixedly connected by at least two connecting rods, so that a closed structure is formed between the clamping half-tile, the straightening half-tile and the connecting rod;

[0006] The rotary tensioning mechanism comprises a rotary rod, one end of which is formed with a tensioning convex surface;

[0007] The rotating rod is connected to the connecting rod, and the loading and unloading device is put on the protective cap. The rotating rod is rotated, and the distance between the tightening convex surface and the clamping half-wafer is reduced, and finally the rotating force of the rotating rod acts on the protective cap through the tightening convex surface and the clamping half-wafer, thereby realizing the installation or removal of the protective cap.

[0008] Furthermore, an elastic coating is fixedly provided on the surface of the tightening convex surface and the surface opposite to the clamping half-tile.

[0009] Furthermore, the minimum distance between the clamping half-tile and the tightening convex surface is 3-5 mm smaller than the wall thickness of the protective cap.

[0010] Furthermore, the outline formed by the clamping half-tile and the straightening half-tile is circular, and the diameter of the circle is larger than the outer diameter of the protective cap.

[0011] Furthermore, there are two connecting rods, which are arranged in parallel, and are respectively provided with an upper connecting hole and a lower connecting hole, and the upper connecting hole and the lower connecting hole are located on the connecting rod close to the clamping half-tile.

[0012] Furthermore, the surface of the tightening convex surface opposite to the clamping half-shell is an arc-shaped surface, and the curvature of the arc-shaped surface is 1 / 2 to 4 / 5 of the curvature of the inner arc of the protective cap.

[0013] Furthermore, an upper cap connection hole and a disassembly cap connection hole are also provided on the rotating rod, and the upper cap connection hole and the disassembly cap connection hole can be connected to the upper connection hole and the lower connection hole on the connecting rod respectively.

[0014] Furthermore, the length of the force arm of the rotating rod is 1.5 to 2 times the diameter of the protective cap.

[0015] Furthermore, a rotating handle is fixedly provided at the end of the rotating rod.

[0016] Furthermore, the arc lengths of the clamping half-tile and the straightening half-tile are 1 / 6 to 1 / 4 of the circumference of the entire circle.

[0017] The advantages and positive effects of the present invention are:

[0018] The loading and unloading device of the present invention has a simple structure and is very convenient to use. When in use, the straightening and fixing mechanism is sleeved on the outer protective cap, and the tightening convex surface of the rotary tightening mechanism is placed on the inner wall of the protective cap. By rotating and applying force, the clamping and rotating actions are solved at one time, so that the work efficiency of installing or removing the protective cap is greatly improved and the intensity of physical labor is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it should be understood that these drawings are designed only for explanation purposes and are not intended to limit the scope of the present invention. In addition, unless otherwise specified, these drawings are intended only to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.

[0020] Figure 1 It is a schematic diagram of the use of a device dedicated to the installation and removal of a protective cap of an oil casing according to an embodiment of the present invention;

[0021] Figure 2 It is a schematic top view of the structure of a straightening and fixing mechanism specially used for a device for loading and unloading a protective cap of an oil casing according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the main structure of the straightening and fixing mechanism used in the oil casing protection cap loading and unloading device according to an embodiment of the present invention;

[0023] Figure 4 It is a top view structural schematic diagram of a rotary tensioning mechanism specially used for a device for mounting and disassembling a protective cap of an oil casing according to an embodiment of the present invention;

[0024] Figure 5 It is a schematic diagram of the main structure of a rotary tensioning mechanism specially used in a device for installing and removing a protective cap of an oil casing according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the use of the dedicated oil casing protection cap mounting and dismounting device according to an embodiment of the present invention for mounting a protection cap;

[0026] Figure 7 The present invention is a schematic diagram of the use of a device for mounting and disassembling a protective cap of an oil casing according to an embodiment of the present invention for disassembling a protective cap. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the embodiment of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] like Figure 1-7As shown, the device for mounting and dismounting the protective cap of the oil casing of the present invention comprises a straightening and fixing mechanism 1 and a rotating tensioning mechanism 2;

[0030] The straightening and fixing mechanism 1 comprises a clamping half-tile 11, a straightening half-tile 12 and a connecting rod 13. The clamping half-tile 11 and the straightening half-tile 12 are fixedly connected by at least two connecting rods 13, so that a closed structure is formed between the clamping half-tile 11, the straightening half-tile 12 and the connecting rod 13.

[0031] The rotating tensioning mechanism 2 comprises a rotating rod 25, one end of which is formed with a tensioning convex surface 21;

[0032] The rotating rod 25 is connected to the connecting rod 13. The loading and unloading device is put on the protective cap. The rotating rod 25 is rotated, and the distance between the tightening convex surface 21 and the clamping half-wall 11 is reduced, and finally the rotating force of the rotating rod 25 acts on the protective cap to achieve the installation or removal of the protective cap.

[0033] Specifically, the outline formed by the clamping half-tile 11 and the straightening half-tile 12 is circular, and the diameter of the circle is larger than the outer diameter of the protective cap, which can be considered to be 5-8 mm larger; and it can be considered that the arc length of the clamping half-tile 11 and the straightening half-tile 12 is 1 / 6 to 1 / 4 of the circumference of the whole circle. There are two connecting rods 13, and the two connecting rods 13 are arranged in parallel, and the two connecting rods 13 are respectively provided with an upper connecting hole 131 and a lower connecting hole 132, and the upper connecting hole 131 and the lower connecting hole 132 are located on the connecting rod 13 close to the clamping half-tile. It can be considered that the vertical length of the center of the hole from the inner wall of the clamping half-tile 11 is 2 / 3 to 9 / 10 of the radius of the circle corresponding to the clamping half-tile. This is because the tensioning convex surface is limited by the distance between the upper and lower connecting rods and can only swing between the upper and lower connecting rods; when in use, the rotating handle is rotated a certain angle degree, the center hole is within this position range, the spacing between the tightening convex surface and the clamping half-tile is larger, and the protective cap can be conveniently placed in the gap between the tightening convex surface and the clamping half-tile. It can be considered that: the surface of the tightening convex surface 21 opposite to the clamping half-tile 11 is an arc surface, and the curvature of the arc surface is 1 / 2 to 4 / 5 of the curvature of the inner arc of the protective cap. This arc curvature can make the arc middle of the tightening convex surface contact with the inner wall of the protective cap. If the arc curvature is greater than 1, the arc edge of the tightening convex surface contacts the inner wall of the protective cap. If the arc curvature radius is too small, the tightening convex surface is easy to cause damage to the protective cap;

[0034] In order to reduce the damage to the surface of the protective cap when installing or removing the protective cap, and to increase the friction force when installing or removing the protective cap, it can be considered that the tightening convex surface 21 and the surface opposite to the clamping half-wall 11 are fixedly provided with an elastic coating; the elastic coating here can be considered to be a rubber coating with a coating thickness of 1 to 2 mm; of course, other elastic coatings can also be used, and the coating thickness is considered as appropriate according to the coating material and the structure and composition of the protective cap;

[0035] It should be noted that, in order to enable the clamping half-walled shoe 11 and the tensioning convex surface 21 to better exert force on the protective cap, it can be considered that the clamping half-walled shoe 11 has a certain height compared to the connecting rod 13, such as Figure 3 The tightening convex surface 21 has a certain height compared to the rotating rod 25, such as Figure 5 As shown;

[0036] The rotating rod 25 is also provided with an upper cap connection hole 22 and a disassembly cap connection hole 23 , and the upper cap connection hole 22 and the disassembly cap connection hole 23 can be connected to the upper connection hole 131 and the lower connection hole 132 on the connecting rod 13 respectively through the pin bolt 3 .

[0037] In order to facilitate rotation, it can be considered that a rotating handle 24 is also fixedly provided at the end of the rotating rod 25; and the lever arm length of the rotating rod 25 is 1.5 to 2 times the diameter of the protective cap, which can make the device more portable; this is the requirement for a moderate lever arm. When the lever arm length is too long, the user's arm rotation radius is large and the operation is inconvenient; when the lever arm is too short, the user has to work hard.

[0038] In this embodiment, there are two connecting rods 13, which are symmetrically and parallelly installed between the clamping half tile 11 and the straightening half tile 12. The clamping half tile 11, the straightening half tile 12 and the connecting rods 13 can be fixedly connected by welding or other methods.

[0039] In order to enable the tightening convex surface 21 to exert a force on the protective cap, the minimum distance between the clamping half-shell 11 and the tightening convex surface 21 is 3-5 mm smaller than the wall thickness of the protective cap.

[0040] For example, when the protective cap 4 is installed by using the loading and unloading device, the upper connection hole 131 on the straightening and fixing mechanism 1 is aligned with the upper cap connection hole 22 on the rotating and tightening mechanism 2, and the pin bolt 3 is inserted into the two holes to connect and fix them; the rotating handle 24 is rotated counterclockwise by a certain angle, such as Figure 7As shown, at this time, the gap between the tightening convex surface 21 and the clamping half-tile 11 increases, making the gap exceed the thickness of the wall thickness of the edge of the protective cap, and the device is put on the protective cap; hold the rotating handle 24 and apply a clockwise rotating force. As the gap between the tightening convex surface 21 and the clamping half-tile 11 continues to narrow, the clamping force of the tightening convex surface 21 and the clamping half-tile 11 on the inner and outer walls of the protective cap continues to increase; because the minimum gap between the tightening convex surface 21 and the clamping half-tile 11 is smaller than the wall thickness of the protective cap, when the clamping force increases to a certain extent, continue to rotate the rotating handle 24, the rotating force begins to act on the protective cap, and the rotating handle 24 is continuously rotated. The protective cap is gradually tightened. When the tightening degree of the protective cap reaches the maximum hand tightening force, the installation of the protective cap is completed; after the installation of the protective cap is completed, a counterclockwise rotating force is applied to the rotating handle 24, the gap between the tightening convex surface 21 and the clamping half-tile 11 begins to increase, and the device can be removed; when the loading and unloading device is used to remove the protective cap, the lower connecting member on the straightening fixing mechanism 1 The hole 132 is aligned with the cap removal connection hole 23 of the rotating tensioning mechanism 2, and the pin bolt 3 is passed through the two holes to connect and fix; the rotating handle 24 is rotated clockwise by a certain angle, at which time the gap between the tensioning convex surface 21 and the clamping half-tile 11 increases, so that the gap exceeds the thickness of the edge of the protective cap, and the device is put on the protective cap; holding the rotating handle 24, applying a counterclockwise rotation force, as the gap between the tensioning convex surface 21 and the clamping half-tile 11 continues to narrow, the clamping force of the tensioning convex surface 21 and the clamping half-tile 11 on the inner and outer walls of the protective cap continues to increase; since the minimum gap between the tensioning convex surface 21 and the clamping half-tile 11 is smaller than the wall thickness of the protective cap, when the clamping force increases to a certain extent, the rotating handle 24 is continued to be rotated, and the rotational force begins to act on the protective cap; the rotating handle 24 is continuously rotated, and the protective cap is gradually removed; after the protective cap is removed, a clockwise rotation force is applied to the rotating handle 24, and the gap between the tensioning convex surface 21 and the clamping half-tile 11 begins to increase, and the device can be removed.

[0041] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device specially used for loading and unloading protective caps of oil casing, characterized in that: It includes a straightening and fixing mechanism and a rotating and tightening mechanism; The straightening and fixing mechanism comprises a clamping half-tile, a straightening half-tile and a connecting rod, wherein the clamping half-tile and the straightening half-tile are fixedly connected by at least two connecting rods, so that a closed structure is formed between the clamping half-tile, the straightening half-tile and the connecting rod; The rotary tensioning mechanism comprises a rotary rod, one end of which is formed with a tensioning convex surface; The rotating rod is connected to the connecting rod, and the loading and unloading device is put on the protective cap. The rotating rod is rotated, and the distance between the tightening convex surface and the clamping half-wall is reduced, and finally the rotating force of the rotating rod acts on the protective cap through the tightening convex surface and the clamping half-wall, so as to realize the installation or removal of the protective cap; The minimum distance between the clamping half-shell and the tightening convex surface is 3 to 5 mm smaller than the wall thickness of the protective cap; The outline formed by the clamping half-tile and the straightening half-tile is circular, and the diameter of the circle is larger than the outer diameter of the protective cap; There are two connecting rods, which are arranged in parallel, and are respectively provided with an upper connecting hole and a lower connecting hole, and the upper connecting hole and the lower connecting hole are located on the connecting rod close to the clamping half-tile; The rotating rod is also provided with an upper cap connection hole and a disassembly cap connection hole, and the upper cap connection hole and the disassembly cap connection hole can be connected with the upper connection hole and the lower connection hole on the connecting rod respectively.

2. The device for loading and unloading the protective cap of the oil casing according to claim 1 is characterized in that: The tensioning convex surface and the surface opposite to the clamping half-walled shell are both fixedly provided with elastic coatings.

3. The device for loading and unloading protective caps for oil casing according to claim 1 is characterized in that: The surface of the tightening convex surface opposite to the clamping half-shell is an arc surface, and the curvature of the arc surface is 1 / 2 to 4 / 5 of the curvature of the inner arc of the protective cap.

4. The device for loading and unloading protective caps for oil casing according to claim 1 is characterized in that: The length of the force arm of the rotating rod is 1.5 to 2 times the diameter of the protective cap.

5. The device for loading and unloading protective caps for oil casing according to claim 1 is characterized in that: A rotating handle is also fixedly provided at the end of the rotating rod.

6. The device for mounting and dismounting protective caps for oil casing according to claim 1 is characterized in that: The arc lengths of the clamping half-tile and the straightening half-tile are 1 / 6 to 1 / 4 of the circumference of the entire circle.

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