Convenient-to-connect water injection anti-corrosion central pipe for petroleum machinery

Abstract

The invention discloses a convenient-to-connect water injection anti-corrosion center pipe for petroleum machinery, and relates to the technical field of pipelines, the convenient-to-connect water injection anti-corrosion center pipe comprises two water injection center pipes, a first fixing ring is fixed to the position, close to one end, of the outer surface of one water injection center pipe, and a plurality of mounting grooves are formed in the outer surface of the first fixing ring; when the water injection center pipes need to be connected, one ends of the two water injection center pipes are connected firstly, the outer surface of a second fixing ring is sleeved with a lantern ring, accordingly, a plurality of gaskets are inserted into a plurality of corresponding clamping grooves correspondingly, meanwhile, a plurality of connecting grooves rotate to the positions corresponding to a plurality of limiting grooves correspondingly, and the water injection center pipes are connected. The multiple movable blocks are embedded into the multiple limiting grooves through the movable rings correspondingly, then the round ball parts in the multiple limiting buckles are moved to the outer portions of the limiting holes, and tight fixed connection between the two water injection center pipes is completed.

Description

Technical Field

[0001] The invention relates to the technical field of pipelines, in particular to a water injection anti-corrosion central pipe which is convenient to connect for petroleum machinery. Background Art

[0002] The water injection anti-corrosion center pipe used for easy connection in petroleum machinery refers to a center pipe with anti-corrosion properties. It is used for water injection operations during oil extraction. This type of center pipe not only needs to withstand high pressure and corrosion, but also needs to have the characteristics of quick connection and disassembly to improve operating efficiency.

[0003] At present, the water injection anti-corrosion center pipe is mainly used for water injection operations when extracting oil from mines. In order to facilitate the connection between the water injection anti-corrosion center pipes, a threaded connection is often used to connect and fix the two water injection anti-corrosion center pipes. Due to the particularity of the pipeline layout in the well, the pipeline is easily subjected to uneven support and tension, which affects the sealing of the threaded connection, and then causes water leakage in the water injection anti-corrosion center pipe, thereby causing pollution in the oil mine.

[0004] Therefore, we propose a water-injected anti-corrosion central pipe for petroleum machinery that is easy to connect in order to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a water injection anti-corrosion center pipe for petroleum machinery that is easy to connect, so as to solve the problem that the threaded connection between two water injection anti-corrosion center pipes is easily loosened and has reduced sealing due to the influence of the external environment.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a water injection anti-corrosion center pipe that is easy to connect for petroleum machinery, comprising two water injection center pipes, wherein a first fixing ring is fixed on the outer surface of one of the water injection center pipes near one end, a plurality of mounting grooves are provided on the outer surface of the first fixing ring, and a plurality of inner walls of the mounting grooves are all provided with gaskets for waterproofing, and a second fixing ring is fixedly installed on the outer surface of the other water injection center pipe near one end, a plurality of clamping grooves are provided on the outer surface of the second fixing ring, a plurality of limit grooves are provided on the outer surface of the second fixing ring, and a limit groove is provided on the outer surface of the first fixing ring The positioning assembly includes a ring, a plurality of connecting grooves are provided on the outer surface of the ring near the center, and movable blocks are movably embedded inside the plurality of connecting grooves, a plurality of first dampers are provided on the inner walls on one side of the plurality of connecting grooves, and a first spring is provided on the outer surface of the plurality of first dampers, a mounting ring is fixedly installed on the outer surface of the ring near one side edge, a movable ring is slidably connected inside the mounting ring, a plurality of limiting buckles are fixed on the outer surface of the movable ring, a connecting block is rotatably connected to the outer surface of the ring near the other side edge, and a plurality of limiting holes are provided on the outer surface of the connecting block.

[0007] Preferably, the inner wall of the sleeve is rotatably connected to the inside of the first fixed ring, one end of each of the first dampers is fixedly connected to the outer surfaces of each of the movable blocks, and one end of each of the first springs is fixedly connected to the inner walls of each of the connecting grooves.

[0008] Preferably, the other ends of the plurality of first springs are respectively fixedly connected to the outer surfaces of the plurality of movable blocks, the outer surfaces of the plurality of movable blocks are respectively movably connected to the inner parts of the plurality of limit grooves, and the outer surface of the movable ring movably penetrates to the outside of the mounting ring.

[0009] Preferably, the water injection center pipe includes a steel pipe, an epoxy resin layer is arranged on the outer surface of the steel pipe, a polyurethane layer is arranged on the outer surface of the epoxy resin layer, a polyethylene anti-corrosion layer is arranged on the outer surface of the polyurethane layer, and an asphalt layer is arranged on the outer surface of the polyethylene anti-corrosion layer.

[0010] Preferably, grooves are opened inside the plurality of limiting holes, protection components are arranged inside the plurality of grooves, and the plurality of protection components include connecting pipes, and the two ends of the plurality of connecting pipes are respectively fixedly connected to the relative inner walls of the grooves.

[0011] Preferably, a movable rod is movably sleeved on the outer surfaces of the plurality of connecting pipes, an inclined block is fixed to the inner walls of the plurality of grooves, a second damper is arranged on the outer surfaces of the plurality of inclined blocks, and a second spring is arranged on the outer surfaces of the plurality of second dampers.

[0012] Preferably, a rotating tube is fixed at one end of each of the plurality of second dampers, one end of each of the plurality of second springs is fixedly connected to the outer surface of each of the plurality of inclined blocks, and the other end of each of the plurality of second springs is fixedly connected to the outer surface of each of the plurality of rotating tubes.

[0013] Preferably, the outer surfaces of the multiple movable rods are fixedly connected to two mounting plates, the multiple mounting plates form a group of two, a connecting shaft is fixed between the outer surfaces of each group of mounting plates, and the outer surfaces of the multiple connecting shafts are respectively rotatably connected to the inner parts of the multiple rotating tubes.

[0014] Preferably, a cleaning assembly is arranged inside one of the water injection center tubes, and the cleaning assembly includes a bent pipe, one end of the bent pipe is fixedly connected to the inner wall of one of the water injection center tubes, a load-bearing block is fixed to the other end of the bent pipe, and a driving motor is arranged on the outer surface of the load-bearing block.

[0015] Preferably, the output shaft of the driving motor is fixedly mounted with a supporting tube, a limiting rod is fixed at one end of the supporting tube, a cleaning plate for cleaning dirt on the inner wall of the pipe is fixed on the outer surface of one side of the limiting rod, and an ultrasonic detector is arranged on the outer surface of the other side of the limiting rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When it is necessary to connect the water injection center pipe, first connect one end of the two water injection center pipes so that the sleeve ring is sleeved on the outer surface of the second fixed ring, so that the multiple washers are respectively inserted into the corresponding multiple card slots, and at the same time, the multiple connecting slots are respectively rotated to the positions corresponding to the multiple limit slots, and the multiple movable blocks are respectively embedded into the multiple limit slots through the movable ring, and then the spherical parts in the multiple limit buckles are moved to the outside of the limit holes, thus completing the tight and fixed connection between the two water injection center pipes, and solving the problem that the threaded connection between the two water injection anti-corrosion center pipes in the prior art is easily affected by the external environment and loosens and reduces the sealing.

[0017] 2. After the multiple limit buckles are respectively embedded in the multiple limit holes, the multiple limit buckles are moved to the long grooves in the limit holes during the counterclockwise rotation of the connecting block. The multiple limit buckles cannot be moved out of the long grooves in the limit holes through the action of the multiple movable rods, thereby strengthening the connection between the limit holes and the limit buckles and further improving the sealing of the connection of the water injection anti-corrosion center pipe.

[0018] 3. In order to increase the corrosion resistance of the water injection center pipe, first of all, the setting of the steel pipe improves the pressure resistance of the water injection center pipe. The setting of the epoxy resin layer, the polyurethane layer, the polyethylene anti-corrosion layer and the asphalt layer improves the corrosion resistance of the water injection center pipe. When there is a lot of dirt at the connection between the two water injection center pipes, start the drive motor to drive the cleaning plate to rotate along the connection between the two water injection center pipes to clean the inner walls of the two water injection center pipes, effectively preventing the connection between the two water injection center pipes from causing a lot of dirt to cause leakage of the water injection anti-corrosion center pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front perspective view of a water injection anti-corrosion central pipe conveniently connected for petroleum machinery of the present invention; Figure 2 It is a schematic diagram of the structure of the water injection center pipe part of a water injection anti-corrosion center pipe which is convenient to connect for petroleum machinery of the present invention; Figure 3 A side perspective view of a water injection anti-corrosion central pipe conveniently connected for petroleum machinery according to the present invention; Figure 4 It is a sectional perspective view of a water injection center pipe part structure of a water injection anti-corrosion center pipe convenient to connect for petroleum machinery of the present invention; Figure 5 A partially cutaway perspective view of a first fixing ring of a water injection anti-corrosion central pipe for petroleum machinery that is convenient to connect according to the present invention; Figure 6It is a partial three-dimensional diagram of a limiting assembly of a water injection anti-corrosion central pipe for petroleum machinery that is convenient to connect according to the present invention; Figure 7 It is a cutaway perspective view of a collar portion of a water injection anti-corrosion central pipe conveniently connected for petroleum machinery of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle; Fig. 9 It is a sectional perspective view of the structure of the mounting ring of a water injection anti-corrosion central pipe for petroleum machinery that is easy to connect according to the present invention; Fig.10 It is a cross-sectional perspective view of another angle of the structure of the collar portion of a water injection anti-corrosion central pipe for petroleum machinery that is convenient to connect according to the present invention; Fig.11 It is a cross-sectional perspective view of a connecting block part structure of a water injection anti-corrosion central pipe for petroleum machinery that is convenient to connect according to the present invention; Fig.12 For the present invention Fig.11 Enlarged view of point B in the middle; Fig.13 It is a perspective view of the partial structure of the protection component of a water injection anti-corrosion central pipe for petroleum machinery that is easy to connect according to the present invention; Fig.14 This is a partial stereoscopic view of a cleaning assembly of a water injection anti-corrosion central pipe that is easily connected for petroleum machinery according to the present invention.

[0020] In the figure: 1. Water injection center pipe; 101. Steel pipe; 102. Epoxy resin layer; 103. Polyurethane layer; 104. Polyethylene anticorrosion layer; 105. Asphalt layer; 2. First fixing ring; 3. Mounting groove; 4. Washer; 5. Second fixing ring; 6. Slot; 7. Limiting groove; 8. Limiting assembly; 801. Ring; 802. Connecting groove; 803. Movable block; 804. First damper; 805. First spring; 806. Mounting ring; 807. Movable ring; 808. Limiting buckle; 9. Connecting block ; 10. Limiting hole; 11. Groove; 12. Protection assembly; 1201. Connecting pipe; 1202. Movable rod; 1203. Inclined block; 1204. Second damper; 1205. Second spring; 1206. Rotating pipe; 1207. Mounting plate; 1208. Connecting shaft; 13. Cleaning assembly; 1301. Bend pipe; 1302. Load-bearing block; 1303. Driving motor; 1304. Load-bearing pipe; 1305. Limiting rod; 1306. Cleaning plate; 1307. Ultrasonic detector. DETAILED DESCRIPTION

[0021] 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 implementation regulations 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 creative work are within the scope of protection of the present invention.

[0022] First embodiment

[0023] See also Figure 1-14 The present invention provides a technical solution: a water injection anti-corrosion center pipe that is easy to connect for petroleum machinery, comprising two water injection center pipes 1, wherein a first fixing ring 2 is fixed on the outer surface of one of the water injection center pipes 1 near one end, a plurality of mounting grooves 3 are provided on the outer surface of the first fixing ring 2, and a plurality of inner walls of the mounting grooves 3 are all provided with gaskets 4 for waterproofing, a second fixing ring 5 is fixedly installed on the outer surface of the other water injection center pipe 1 near one end, a plurality of clamping grooves 6 are provided on the outer surface of the second fixing ring 5, a plurality of limiting grooves 7 are provided on the outer surface of the second fixing ring 5, a limiting component 8 is provided on the outer surface of the first fixing ring 2, and the limiting component 8 comprises a collar 801, a plurality of connecting grooves 802 are provided on the outer surface of the collar 801 near the center, a plurality of movable blocks 803 are movably embedded in the interior of the plurality of connecting grooves 802, a plurality of first dampers 804 are provided on the inner walls of one side of the plurality of connecting grooves 802, and the outer surfaces of the plurality of first dampers 804 A first spring 805 is arranged on each surface, a mounting ring 806 is fixedly installed on the outer surface of the ring 801 near one side edge, a movable ring 807 is slidably connected inside the mounting ring 806, a plurality of limit buckles 808 are fixed on the outer surface of the movable ring 807, a connecting block 9 is rotatably connected to the outer surface of the ring 801 near the other side edge, a plurality of limit holes 10 are provided on the outer surface of the connecting block 9, the inner wall of the ring 801 is rotatably connected to the inside of the first fixed ring 2, one end of the plurality of first dampers 804 is respectively fixedly connected to the outer surfaces of the plurality of movable blocks 803, one end of the plurality of first springs 805 is respectively fixedly connected to the inner walls of the plurality of connecting grooves 802, the other ends of the plurality of first springs 805 are respectively fixedly connected to the outer surfaces of the plurality of movable blocks 803, the outer surfaces of the plurality of movable blocks 803 are respectively movably connected to the inside of the plurality of limit grooves 7, and the outer surface of the movable ring 807 movably penetrates to the outside of the mounting ring 806.

[0024] In this embodiment, during the oil production process, when it is necessary to set up a water injection anti-corrosion central pipe in the mine, firstly, one end of the two water injection central pipes 1 are connected, so that the collar 801 is sleeved on the outer surface of the second fixed ring 5, so that the multiple washers 4 are respectively inserted into the corresponding multiple card slots 6 and squeezed, thereby realizing a tight connection between the two water injection central pipes 1 to prevent water leakage, wherein the washers 4 are made of polytetrafluoroethylene material, and have excellent waterproof performance and corrosion resistance, and have the advantages of high temperature resistance, corrosion resistance, wear resistance, low friction coefficient, etc., and can be used for a long time in various harsh environments, and then the collar 801 is rotated, so that the multiple connection grooves 802 are respectively rotated to the positions corresponding to the multiple limit grooves 7, so that the multiple movable blocks 803 are respectively corresponding to the multiple limit grooves 7, wherein the outer diameter of the movable block 803 corresponding to the limit groove 7 matches the inner diameter of the limit groove 7, and then the movable ring 807 is moved toward the direction of the connection block 9, wherein, as Fig. 9 As shown, the inner cross section of the mounting ring 806 matches the inner cross section of the movable ring 807, which is intended to limit the movable ring 807 and facilitate the movement of the movable ring 807, thereby moving the plurality of movable blocks 803 toward the inside of the sleeve ring 801. Figure 7 As shown, one side of the movable block 803 is sloped, and its purpose is to facilitate the movement of the movable ring 807, so that the multiple movable blocks 803 are respectively embedded in the multiple limiting grooves 7. At this time, the multiple first springs 805 are squeezed and shortened, and the movement of the multiple movable rings 807 drives the multiple limiting buckles 808 to move. When the multiple limiting buckles 808 move to the outer surface of the connecting block 9, the connecting block 9 is rotated, wherein, as shown in FIG. Fig.10 As shown, the connection between the connecting block 9 and the collar 801 is in a T shape, the purpose of which is to limit the connecting block 9 and facilitate the rotation of the connecting block 9. The connecting block 9 drives the multiple limiting holes 10 to rotate, wherein the maximum inner diameter of the limiting hole 10 matches the maximum outer diameter of the limiting buckle 808. When the maximum inner diameter of the limiting hole 10 rotates to a position corresponding to the maximum outer diameter of the limiting buckle 808, the multiple limiting buckles 808 continue to be moved toward the direction of the connecting block 9, so that the multiple limiting buckles 808 are respectively embedded in the multiple limiting holes 10. When the spherical part in the buckle 808 moves to the outside of the limiting hole 10, the connecting block 9 is rotated counterclockwise so that multiple limiting buckles 808 are embedded in the strip groove part in the limiting hole 10, thereby completing the fixation of the limiting buckle 808, thereby making the two water injection center pipes 1 fixedly connected. Through the support of multiple connecting parts and the heavy protection of multiple gaskets 4, the connection between the two water injection center pipes 1 is more stable and not easy to loosen, thereby solving the problem in the prior art that the threaded connection between the two water injection anti-corrosion center pipes is easily affected by the external environment and loosens, reducing the sealing.

[0025] Second embodiment

[0026] like Figure 1 and Figure 3-13 As shown, a water injection anti-corrosion center pipe for oil machinery that is easy to connect includes two water injection center pipes 1, wherein a first fixing ring 2 is fixed near one end of the outer surface of one of the water injection center pipes 1, a plurality of mounting grooves 3 are provided on the outer surface of the first fixing ring 2, and a plurality of inner walls of the mounting grooves 3 are provided with gaskets 4 for waterproofing, a second fixing ring 5 is fixed near one end of the outer surface of the other water injection center pipe 1, a plurality of clamping grooves 6 are provided on the outer surface of the second fixing ring 5, a plurality of limiting grooves 7 are provided on the outer surface of the second fixing ring 5, a limiting assembly 8 is provided on the outer surface of the first fixing ring 2, and the limiting assembly 8 includes a sleeve ring 801, a plurality of connection grooves 802 are provided near the center of the outer surface of the collar 801, and a movable block 803 is movably embedded in the interior of the plurality of connection grooves 802, a plurality of first dampers 804 are provided on the inner walls of one side of the plurality of connection grooves 802, and a first spring 805 is provided on the outer surface of the plurality of first dampers 804, a mounting ring 806 is fixedly installed near one edge of the outer surface of the collar 801, a movable ring 807 is slidably connected inside the mounting ring 806, and a plurality of limit buckles 808 are fixed on the outer surface of the movable ring 807, and a connection block is rotatably connected to the outer surface of the collar 801 near the other edge 9, the outer surface of the connecting block 9 is provided with a plurality of limiting holes 10, the interiors of the plurality of limiting holes 10 are provided with grooves 11, the interiors of the plurality of grooves 11 are provided with protective components 12, the plurality of protective components 12 include connecting pipes 1201, the two ends of the plurality of connecting pipes 1201 are respectively fixedly connected to the opposite inner walls of the grooves 11, the outer surfaces of the plurality of connecting pipes 1201 are movably sleeved with movable rods 1202, the inner walls of the plurality of grooves 11 are fixed with inclined blocks 1203, the outer surfaces of the plurality of inclined blocks 1203 are provided with second dampers 1204, and the outer surfaces of the plurality of second dampers 1204 are provided with second elastic Spring 1205, one end of each of the multiple second dampers 1204 is fixed with a rotating tube 1206, one end of each of the multiple second springs 1205 is fixedly connected to the outer surfaces of the multiple inclined blocks 1203, the other ends of the multiple second springs 1205 are fixedly connected to the outer surfaces of the multiple rotating tubes 1206, the outer surfaces of the multiple movable rods 1202 are fixedly connected to two mounting plates 1207, the multiple mounting plates 1207 are grouped in pairs, and connecting shafts 1208 are fixed between the outer surfaces of each group of mounting plates 1207, and the outer surfaces of the multiple connecting shafts 1208 are respectively rotatably connected to the inside of the multiple rotating tubes 1206.

[0027] In this embodiment, after the plurality of limit buckles 808 are respectively embedded in the plurality of limit holes 10, the plurality of limit buckles 808 are respectively moved to the long grooves in the limit holes 10 during the counterclockwise rotation of the connecting block 9. During the movement, the plurality of movable rods 1202 are squeezed and rotated clockwise downward, so that the plurality of second springs 1205 are stretched under the action of external force. When the outer surface of the limit buckle 808 is not in contact with the outer surface of the movable rod 1202, the plurality of second springs 1205 are shortened under the action of their own elastic force, driving the movable rod 1202 to reset. When the limit buckle 808 moves to the outer edge of the movable rod 1202 again, as shown in FIG. Fig.12 As shown, the movable rod 1202 is limited by the groove 11 so that it can only rotate counterclockwise to a position perpendicular to the groove 11, thereby making it impossible for multiple limiting buckles 808 to move out of the long groove in the limiting hole 10, thereby strengthening the connection between the limiting hole 10 and the limiting buckle 808, and then strengthening the connection between the multiple movable blocks 803 and the limiting groove 7, thereby further strengthening the connection between the two water injection center pipes 1, and further improving the sealing of the connection between the water injection anti-corrosion center pipe.

[0028] Third embodiment

[0029] like Figure 1-4 , Figure 6 and Fig.14 As shown, the water injection center pipe 1 includes a steel pipe 101, an epoxy resin layer 102 is arranged on the outer surface of the steel pipe 101, a polyurethane layer 103 is arranged on the outer surface of the epoxy resin layer 102, a polyethylene anti-corrosion layer 104 is arranged on the outer surface of the polyurethane layer 103, and an asphalt layer 105 is arranged on the outer surface of the polyethylene anti-corrosion layer 104. A cleaning component 13 is arranged inside one of the water injection center pipes 1, and the cleaning component 13 includes a bend pipe 1301, one end of the bend pipe 1301 is fixedly connected to the inner wall of one of the water injection center pipes 1, and a load-bearing block 1302 is fixed to the other end of the bend pipe 1301, a driving motor 1303 is arranged on the outer surface of the load-bearing block 1302, and a bearing pipe 1304 is fixedly installed on the output shaft of the driving motor 1303, and a limiting rod 1305 is fixed on one end of the bearing pipe 1304, and a cleaning plate 1306 for cleaning dirt on the inner wall of the pipeline is fixed on the outer surface of one side of the limiting rod 1305, and an ultrasonic detector 1307 is arranged on the outer surface of the other side of the limiting rod 1305.

[0030] In this embodiment, in order to increase the corrosion resistance of the water injection center pipe 1, first, the steel pipe 101 is arranged to improve the pressure resistance of the water injection center pipe 1, and the corrosion resistance of the water injection center pipe 1 is improved by the arrangement of the epoxy resin layer 102, the polyurethane layer 103, the polyethylene anti-corrosion layer 104 and the asphalt layer 105. Among them, the epoxy resin layer 102, the polyurethane layer 103, the polyethylene anti-corrosion layer 104 and the asphalt layer 105 have anti-corrosion properties. The reason is that epoxy resin has good chemical stability, and the ether bonds and benzene rings in its molecular structure enable it to resist the erosion of most chemical substances and is not prone to chemical reactions, thereby reducing the possibility of corrosion. The molecular structure of polyurethane is relatively tight, and its macromolecular segments are intertwined to form a relatively dense network structure, which can effectively block external corrosive substances. The molecular structure of polyethylene is regular and tight, its macromolecular chains are linear, the arrangement is relatively regular, and the intermolecular force is strong, making it difficult for corrosive substances to penetrate into the interior of the material, and asphalt has good waterproof properties. It can form a continuous and dense coating, effectively preventing the penetration of water, thereby reducing the possibility of corrosion caused by contact between water and the protected object. When there is a lot of dirt at the connection between the two water injection center pipes 1, it is easy to cause leakage at the connection between the two water injection center pipes 1. When the ultrasonic detector 1307 detects that there is a lot of dirt at the connection between the two water injection center pipes 1, the ultrasonic wave in the ultrasonic detector 1307 propagates in the medium, and its propagation speed, energy attenuation and other characteristics will be affected by the physical properties of the medium. When there is dirt in the pipeline, the dirt will change the acoustic impedance of ultrasonic propagation. The difference in acoustic impedance This will cause the ultrasonic wave to be reflected and refracted during the propagation process. By receiving and analyzing the reflected ultrasonic signal, the presence and approximate location of dirt in the pipeline can be determined, and then the drive motor 1303 is started to drive the support tube 1304 to rotate, and then drive the limit rod 1305 to rotate, so that the cleaning plate 1306 rotates, wherein the cleaning plate 1306 is in contact with the inner walls of the two water injection center tubes 1. The inner walls of the two water injection center tubes 1 are cleaned by the rotation of the cleaning plate 1306, effectively preventing the occurrence of more dirt at the connection between the two water injection center tubes 1, which may cause leakage of the water injection anti-corrosion center tube.

[0031] The use method and working principle of the device: During the oil production process, when it is necessary to set a water injection anti-corrosion central pipe in the mine, firstly connect one end of two water injection central pipes 1, so that the collar 801 is sleeved on the outer surface of the second fixed ring 5, so that the multiple washers 4 are respectively inserted into the corresponding multiple card slots 6 and squeezed, and then the collar 801 is rotated, so that the multiple connection grooves 802 are respectively rotated to the positions corresponding to the multiple limit grooves 7, so that the multiple movable blocks 803 correspond to the multiple limit grooves 7 respectively. Among them, the outer diameter of the movable block 803 corresponding to the limiting groove 7 matches the inner diameter of the limiting groove 7, and then the movable ring 807 is moved toward the direction of the connecting block 9. At this time, the multiple first springs 805 are squeezed and shortened, and the movement of the multiple movable rings 807 drives the multiple limiting buckles 808 to move. When the multiple limiting buckles 808 move to the outer surface of the connecting block 9, the connecting block 9 is rotated, and the connecting block 9 drives the multiple limiting holes 10 to rotate. When the maximum inner diameter of the limiting hole 10 rotates to the position corresponding to the maximum outer diameter of the limiting buckle 808, Continue to move the plurality of limit buckles 808 in the direction of the connecting block 9, so that the plurality of limit buckles 808 are respectively embedded in the plurality of limit holes 10. When the spherical part in the limit buckle 808 moves to the outside of the limit hole 10, rotate the connecting block 9 counterclockwise so that the plurality of limit buckles 808 are embedded in the strip groove part in the limit hole 10, thus completing the fixation of the limit buckle 808, thereby making the two water injection center pipes 1 fixedly connected. When the plurality of limit buckles 808 are respectively embedded in the plurality of limit holes 10, rotate the connecting block 9 counterclockwise. In the process of connecting the block 9, the plurality of limit buckles 808 are respectively moved to the long grooves in the limit holes 10. In the process of moving, the plurality of movable rods 1202 are squeezed and rotated clockwise downward, so that the plurality of second springs 1205 are stretched under the action of external force. When the outer surface of the limit buckle 808 is not in contact with the outer surface of the movable rod 1202, the plurality of second springs 1205 are shortened under the action of their own elastic force, driving the movable rod 1202 to reset. When the limit buckle 808 moves to the outer edge of the movable rod 1202 again, as shown in FIG. Fig.12As shown, the movable rod 1202 is limited by the groove 11, so that it can only rotate counterclockwise to a position perpendicular to the groove 11, thereby making it impossible for multiple limiting buckles 808 to move out of the long groove in the limiting hole 10, thereby reinforcing the connection between the limiting hole 10 and the limiting buckle 808, and then reinforcing the connection between the multiple movable blocks 803 and the limiting groove 7. In order to increase the corrosion resistance of the water injection center pipe 1, firstly, the steel pipe 101 is set to improve the pressure resistance of the water injection center pipe 1, and the epoxy resin layer 102, the polyurethane layer 103, the polyethylene anti-corrosion layer 104 and the asphalt are used. The setting of the green layer 105 improves the corrosion resistance of the water injection center tube 1. When there is a lot of dirt at the connection between the two water injection center tubes 1, it is easy to cause leakage at the connection between the two water injection center tubes 1. When the ultrasonic detector 1307 detects that there is a lot of dirt at the connection between the two water injection center tubes 1, the drive motor 1303 is started to drive the support tube 1304 to rotate, and then drive the limit rod 1305 to rotate, so that the cleaning plate 1306 rotates, wherein the cleaning plate 1306 is in contact with the inner walls of the two water injection center tubes 1.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water injection anti-corrosion center pipe for petroleum machinery that is easy to connect, comprising two water injection center pipes (1), wherein a first fixing ring (2) is fixed to the outer surface of one of the water injection center pipes (1) near one end, a plurality of mounting grooves (3) are provided on the outer surface of the first fixing ring (2), and a plurality of gaskets (4) for waterproofing are arranged on the inner walls of the plurality of mounting grooves (3); a second fixing ring (5) is fixed to the outer surface of the other water injection center pipe (1) near one end, and a plurality of slots (6) are provided on the outer surface of the second fixing ring (5); Features: The outer surface of the second fixing ring (5) is provided with a plurality of limiting grooves (7); the outer surface of the first fixing ring (2) is provided with a limiting assembly (8); the limiting assembly (8) comprises a collar (801); the outer surface of the collar (801) is provided with a plurality of connecting grooves (802) near the center; a plurality of connecting grooves (802) are each movably embedded with a movable block (803); a plurality of first dampers (804) are each provided on the inner wall of one side of the plurality of connecting grooves (802); a first spring (805) is each provided on the outer surface of the plurality of first dampers (804); a mounting ring (806) is fixedly mounted on the outer surface of the collar (801) near one side edge; a movable ring (807) is slidably connected to the inside of the mounting ring (806); a plurality of limiting buckles (808) are fixedly mounted on the outer surface of the movable ring (807); a connecting block (9) is rotatably connected to the outer surface of the collar (801) near the other side edge; a plurality of limiting holes (10) are disposed on the outer surface of the connecting block (9).

2. The water injection anti-corrosion central pipe for petroleum machinery that is easy to connect according to claim 1 is characterized by: The inner wall of the sleeve ring (801) is rotatably connected to the inside of the first fixed ring (2), one end of each of the first dampers (804) is fixedly connected to the outer surfaces of the movable blocks (803), and one end of each of the first springs (805) is fixedly connected to the inner walls of the connection grooves (802).

3. The water injection anti-corrosion central pipe for petroleum machinery that is easy to connect according to claim 2 is characterized by: The other ends of the plurality of first springs (805) are respectively fixedly connected to the outer surfaces of the plurality of movable blocks (803), the outer surfaces of the plurality of movable blocks (803) are respectively movably connected to the inside of the plurality of limit grooves (7), and the outer surface of the movable ring (807) movably penetrates to the outside of the mounting ring (806).

4. The water injection anti-corrosion central pipe for petroleum machinery that is easy to connect according to claim 3 is characterized by: The water injection center pipe (1) comprises a steel pipe (101), an epoxy resin layer (102) is arranged on the outer surface of the steel pipe (101), a polyurethane layer (103) is arranged on the outer surface of the epoxy resin layer (102), a polyethylene anti-corrosion layer (104) is arranged on the outer surface of the polyurethane layer (103), and an asphalt layer (105) is arranged on the outer surface of the polyethylene anti-corrosion layer (104).

5. The water injection anti-corrosion central pipe for petroleum machinery that is easy to connect according to claim 4 is characterized by: A groove (11) is provided inside each of the plurality of limiting holes (10), a protection component (12) is provided inside each of the plurality of grooves (11), and each of the plurality of protection components (12) comprises a connecting pipe (1201), and both ends of the plurality of connecting pipes (1201) are respectively fixedly connected to the opposite inner walls of the groove (11).

6. The water injection anti-corrosion central pipe for petroleum machinery that is easy to connect according to claim 5, characterized in that: The outer surfaces of the plurality of connecting tubes (1201) are movably sleeved with movable rods (1202), the inner walls of the plurality of grooves (11) are fixed with inclined blocks (1203), the outer surfaces of the plurality of inclined blocks (1203) are provided with second dampers (1204), and the outer surfaces of the plurality of second dampers (1204) are provided with second springs (1205).

7. The water injection anti-corrosion central pipe for petroleum machinery that is easy to connect according to claim 6 is characterized by: A rotating tube (1206) is fixed to one end of each of the plurality of second dampers (1204), one end of each of the plurality of second springs (1205) is fixedly connected to the outer surface of each of the plurality of inclined blocks (1203), and the other end of each of the plurality of second springs (1205) is fixedly connected to the outer surface of each of the plurality of rotating tubes (1206).

8. The water injection anti-corrosion central pipe for petroleum machinery that is easy to connect according to claim 7, characterized in that: The outer surfaces of the plurality of movable rods (1202) are fixedly connected to two mounting plates (1207), and the plurality of mounting plates (1207) are grouped in pairs. A connecting shaft (1208) is fixed between the outer surfaces of each group of mounting plates (1207), and the outer surfaces of the plurality of connecting shafts (1208) are respectively rotatably connected to the inside of the plurality of rotating tubes (1206).

9. The water injection anti-corrosion central pipe for petroleum machinery that is easy to connect according to claim 8, characterized in that: A cleaning assembly (13) is arranged inside one of the water injection center pipes (1), and the cleaning assembly (13) comprises a curved pipe (1301), one end of the curved pipe (1301) is fixedly connected to the inner wall of one of the water injection center pipes (1), and a bearing block (1302) is fixed to the other end of the curved pipe (1301), and a driving motor (1303) is arranged on the outer surface of the bearing block (1302).

10. The water injection anti-corrosion central pipe for petroleum machinery that is easy to connect according to claim 9, characterized in that: The output shaft of the driving motor (1303) is fixedly mounted with a supporting tube (1304); a limiting rod (1305) is fixed at one end of the supporting tube (1304); a cleaning plate (1306) for cleaning dirt on the inner wall of the pipeline is fixed on the outer surface of one side of the limiting rod (1305); and an ultrasonic detector (1307) is arranged on the outer surface of the other side of the limiting rod (1305).

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