Prestress heat insulation oil pipe end connecting structure

Abstract

The utility model discloses a prestress heat insulation oil pipe end connecting structure which comprises an inner pipe and an outer pipe, the inner pipe and the outer pipe are coaxially arranged, the inner pipe is sleeved with the outer pipe, and the two ends of the inner pipe and the two ends of the outer pipe are provided with a pair of connecting ends. The utility model relates to the technical field of heat insulation oil pipes, in particular to a prestress heat insulation oil pipe end connecting structure, an inner pipe and an outer pipe are coaxially arranged, a pair of matched connecting ends are arranged at the two ends of the inner pipe and the two ends of the outer pipe, and the connecting ends of the inner pipe and the outer pipe are matched with each other. The threaded sleeve in the pair of connecting ends is of an annular cavity structure, the threaded sleeve and the threaded plug can be correspondingly connected, an insertion groove of an annular structure is formed in the threaded sleeve, a prefabricated heat insulation plate is fixed through a rod piece, and the heat insulation plate is of an annular structure and arranged in the insertion groove of the threaded sleeve. The heat preservation effect on the connecting position of the heat insulation oil pipe is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat-insulated oil pipes, in particular to a prestressed heat-insulated oil pipe end connection structure. Background Art

[0002] In modern oil and gas production processes, prestressed insulated oil pipes are pipe sections that constitute the oil production pipeline. Prestressed insulated oil pipes mainly play a role in insulation by filling insulation materials between the inner and outer pipes and performing vacuuming, thereby avoiding heat loss and resulting in reduced oil production efficiency.

[0003] Prestressed insulated oil pipes are mainly multi-section connected structures. At present, the ends of prestressed insulated oil pipes are mainly connected with matching threaded socket structures. However, this method does not provide insulation space at the ends of the oil pipes. Therefore, during use, part of the heat of the insulated oil pipes will be dissipated from the ends, resulting in a decrease in the insulation efficiency of the insulated oil pipes. In view of this, in-depth research on the above issues has led to the creation of this case. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a prestressed heat-insulated oil pipe end connection structure, which solves the problems of the prior art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a prestressed insulated oil pipe end connection structure, comprising an inner pipe and an outer pipe, the inner pipe and the outer pipe being coaxially arranged, the outer pipe being sleeved outside the inner pipe, and a pair of connecting ends being provided at both ends of the inner pipe and the outer pipe;

[0006] The connecting end at one end is a threaded plug, and the connecting end at the other end is a threaded sleeve, and the threaded sleeve has an internal thread structure that matches the threaded plug;

[0007] The threaded sleeve is connected to the ends of the inner tube and the outer tube through a transition block. A slot is provided on the threaded sleeve. The slot is arranged on the threaded sleeve, and one end of the slot passes through the threaded sleeve. The head end of the slot is connected to a socket groove.

[0008] The slot is provided with a plurality of jacks in a ring array, a heat insulation plate is inserted in the slot, the heat insulation plate is a ring structure, a plurality of connecting holes are opened on the heat insulation plate, a plurality of connecting holes are inserted into a plurality of connecting bolts and threadedly connected to a plurality of jacks.

[0009] Preferably, the transition block is a plate with a partially conical structure, the diameter of one end of the transition block is the same as the diameter of the outer tube, and the diameter of the other end of the transition block is the same as the diameter of the threaded sleeve.

[0010] Preferably, a closed ring is provided on one side of the outer tube located on the threaded plug, and the closed ring matches the outer diameter of the threaded sleeve.

[0011] Preferably, the transition block diameter matches the diameter of the closing ring. Beneficial effects

[0012] The utility model provides a prestressed insulated oil pipe end connection structure. It has the following beneficial effects: the prestressed insulated oil pipe end connection structure adopts a coaxial arrangement of an inner pipe and an outer pipe, with a pair of matching connecting ends provided at both ends of the inner pipe and the outer pipe. The threaded sleeves in the pair of connecting ends adopt an annular cavity structure, the threaded sleeves and the threaded plugs can be connected accordingly, the threaded sleeves are provided with an annular slot, a prefabricated insulation board is fixed by a rod, and the insulation board adopts an annular structure and is arranged in the slot of the threaded sleeve, thereby providing heat insulation for the connection position of the insulated oil pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional structural schematic diagram of a prestressed heat-insulated oil pipe end connection structure described in the present invention.

[0014] Figure 2 This is a schematic cross-sectional view of a prestressed heat-insulated oil pipe end connection structure described in the present invention.

[0015] Figure 3 This is a schematic diagram of the blasting structure of a prestressed insulated oil pipe end connection structure described in the utility model.

[0016] In the figure: 1. Inner tube; 2. Outer tube; 3. Threaded plug; 4. Threaded sleeve; 5. Transition block; 6. Slot; 7. Socket groove; 8. Socket; 9. Insulation board; 10. Connecting hole; 11. Connecting bolt; 12. Closing ring; 13. Insulation layer. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-3 The present invention provides an implementation scheme: the current prestressed insulated oil pipes are mainly connected at both ends by a matching threaded socket structure. However, this method does not provide insulation space at the end of the oil pipe. Therefore, during use, part of the heat of the insulated oil pipe will be dissipated from the end, resulting in a decrease in the insulation efficiency of the insulated oil pipe.

[0019] In response to the above problems, the present application discloses a prestressed insulated oil pipe end connection structure, comprising an inner pipe 1 and an outer pipe 2, which are coaxially arranged. The outer pipe 2 is sleeved outside the inner pipe 1, and the space between the inner pipe 1 and the outer pipe 2 serves as an installation space for installing thermal insulation material. A pair of connecting ends are provided at both ends of the inner pipe 1 and the outer pipe 2, and the ends of the inner pipe 1 and the outer pipe 2 are fixed by the pair of connecting ends respectively. The pair of connecting ends, the inner pipe 1 and the outer pipe 2 together constitute the main body of the insulated oil pipe;

[0020] According to the instruction manual Figure 1-3 It can be seen that the connection end at one end is a threaded plug 3, and the connection end at the other end is a threaded sleeve 4. The threaded sleeve 4 has an internal thread structure that matches the threaded plug 3. When connecting adjacent insulated oil pipes, the threaded plug 3 and the threaded sleeve 4 are threadedly connected to achieve the function of connecting the insulated oil pipes.

[0021] Then the threaded sleeve 4 is connected to the ends of the inner tube 1 and the outer tube 2 through a transition block 5, and the ends of the inner tube 1 and the outer tube 2 can be connected and fixed by the transition block 5, and then the transition block 5 and the threaded sleeve 4 are integrally formed, and a slot 6 is provided on the threaded sleeve 4, and the slot 6 is annularly arranged on the threaded sleeve 4, and one end of the slot 6 passes through the threaded sleeve 4, and the head end of the slot 6 is connected to a socket groove 7, and the groove body composed of the socket groove 7 and the slot 6 wraps the inner layer of the threaded sleeve 4, which plays a role in connecting with the threaded joint, and the inner layer of the slot 6 is used for installing and wrapping the insulation material, which plays a role in heat preservation of the connection position of the heat-insulating oil pipe;

[0022] According to the instruction manual Figure 1-3 It can be seen that the slot 6 is provided with a plurality of jacks 8 in a ring array, and a heat insulation plate 9 is inserted into the slot 6. The heat insulation plate 9 is a ring structure, and a plurality of connecting holes 10 are opened on the heat insulation plate 9. A plurality of connecting bolts 11 are inserted into the plurality of connecting holes 10;

[0023] The insulation board 9 is made of gel insulation material and is prefabricated. Before the insulation oil pipe is connected, the insulation board 9 is inserted into the slot 6. An annular vacuum groove is provided on the insulation board 9 to enhance the insulation effect. Then, several connecting holes 10 on the insulation board 9 are threadedly connected with several jacks 8 to fix the insulation board 9.

[0024] As a preferred solution, further, the transition block 5 is a plate with a partially conical structure, the diameter of one end of the transition block 5 is the same as the diameter of the outer tube 2, and the diameter of the other end of the transition block 5 is the same as the diameter of the threaded sleeve 4, which serves to enhance the connection stability between the connecting end and the inner tube 1 and the outer tube 2.

[0025] As a preferred solution, further, a closed ring 12 is provided on one side of the outer tube 2 located on the threaded plug 3. The closed ring 12 matches the outer diameter of the threaded sleeve 4. The closed ring 12 receives the end of the corresponding threaded sleeve 4, thereby blocking the socket groove 7.

[0026] As a preferred solution, further, a heat-insulating layer 13 is filled between the inner tube 1 and the outer tube 2. The heat-insulating layer 13 is made of gel and has an excellent heat-insulating effect.

[0027] As a preferred solution, further, the diameter of the transition block 5 matches the diameter of the closed ring 12 .

[0028] From the above, it can be seen that the prestressed insulated oil pipe end connection structure adopts a coaxial arrangement of the inner pipe 1 and the outer pipe 2, and a pair of matching connecting ends are provided at both ends of the inner pipe 1 and the outer pipe 2. The threaded sleeve 4 in the pair of connecting ends adopts an annular cavity structure, and the threaded sleeve 4 and the threaded plug 3 can be connected correspondingly. A slot 6 with an annular structure is provided on the threaded sleeve 4, and a prefabricated insulation board 9 is fixed by a rod. The insulation board 9 adopts an annular structure and is arranged in the slot 6 of the threaded sleeve 4, which plays a role in heat preservation of the connection position of the insulated oil pipe.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prestressed heat-insulated oil pipe end connection structure, comprising an inner pipe (1) and an outer pipe (2), wherein the inner pipe (1) and the outer pipe (2) are coaxially arranged, and the outer pipe (2) is sleeved outside the inner pipe (1), characterized in that: A pair of connecting ends are provided at both ends of the inner tube (1) and the outer tube (2); The connecting end at one end is a threaded plug (3), and the connecting end at the other end is a threaded sleeve (4), wherein the threaded sleeve (4) has an internal thread structure matching the threaded plug (3); The threaded sleeve (4) is connected to the ends of the inner tube (1) and the outer tube (2) via a transition block (5); a slot (6) is provided on the threaded sleeve (4); the slot (6) is arranged around the threaded sleeve (4), and one end of the slot (6) passes through the threaded sleeve (4); the head end of the slot (6) is connected to a socket groove (7); The slot (6) is provided with a plurality of jacks (8) in a ring array, a heat insulation plate (9) is inserted into the slot (6), the heat insulation plate (9) is a ring structure, a plurality of connection holes (10) are opened on the heat insulation plate (9), and a plurality of connection bolts (11) are inserted into the plurality of connection holes (10) and are threadedly connected to the plurality of jacks (8).

2. A prestressed heat-insulated oil pipe end connection structure according to claim 1, characterized in that: The transition block (5) is a plate with a partially conical structure. The diameter of one end of the transition block (5) is the same as the diameter of the outer tube (2), and the diameter of the other end of the transition block (5) is the same as the diameter of the threaded sleeve (4).

3. A prestressed heat-insulated oil pipe end connection structure according to claim 2, characterized in that: The outer tube (2) is provided with a closed ring (12) on one side of the threaded plug (3), and the closed ring (12) matches the outer diameter of the threaded sleeve (4).

4. A prestressed heat-insulated oil pipe end connection structure according to claim 3, characterized in that: A thermal insulation layer (13) is filled between the inner tube (1) and the outer tube (2), and the thermal insulation layer (13) is an annular plate made of gel material.

5. A prestressed heat-insulated oil pipe end connection structure according to claim 4, characterized in that: The diameter of the transition piece (5) matches the diameter of the closing ring (12).

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