Water-filled expansion device for expansion of alloy pipe

Abstract

The utility model discloses a water-filled expansion device for alloy pipe expansion in the technical field of alloy pipe expansion, which comprises a pipe body of an alloy pipe, a central rod is movably connected to the inner side of the pipe body, a connecting port is mounted at the top of the central rod, a sealing element is mounted on the inner side of the pipe body and close to the bottom, a pipe column is fixedly connected to the bottom of the central rod, and the connecting port is connected with the pipe column. The outer side of the pipe column is in threaded connection with an expansion piece, a connecting piece is installed between the expansion piece and the sealing piece, then the center rod drives the expansion piece to be inserted into the pipe body, and then the sealing piece is placed at the bottom of the inner side of the pipe body in advance to be clamped and fixed so that a sealing cavity can be formed between the expansion piece and the sealing piece. An external water pump is used for injecting water into the sealing cavity between the expansion piece and the sealing piece through the center rod for pressurization, so that the expansion piece extrudes the pipe body to expand and be tightly attached to the sleeve.

Description

Technical Field

[0001] This utility model relates to the field of alloy tube expansion, specifically to a water-filled expansion device for alloy tube expansion. Background Technology

[0002] The expansion tube technology utilizes the high strength, plasticity, and ductility of the treated alloy tube. An expansion core is prefabricated inside the tube, and the expansion core is driven by hydraulics / mechanicals to move inside the tube body 1 to expand the tube body 1. After the tube body 1 expands, its inner / outer diameter increases, and the annulus between the expansion tube body 1 and the sleeve is reduced. This squeezes the prefabricated sealing and suspension components on the expansion tube body 1, so that the expansion tube body 1 is sealed to the inner wall of the sleeve, thus completing the purpose of repairing / reinforcing the sleeve.

[0003] Currently, the stability of expansion tubes installed inside the casing is low, and the sealing performance of the expansion tubes is poor, which can easily cause the expansion tubes to not expand fully and fit tightly with the casing. Furthermore, the sealing structure inside the casing is inconvenient to remove later, affecting the convenience and practicality of repairing and reinforcing the casing. Therefore, there is a need to design a water-filled expansion device for alloy tube expansion to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a water-filled expansion device for alloy tube expansion, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water-filled expansion device for alloy tube expansion, comprising an alloy tube body, a central rod movably connected to the inner side of the tube body, a connection port installed at the top of the central rod, a sealing element installed on the inner side of the tube body near the bottom, a tube column fixedly connected to the bottom of the central rod, an expansion element screwed to the outer side of the tube column, and a connecting element installed between the expansion element and the sealing element.

[0006] Preferably, the expansion member includes a connecting portion screwed to the outside of the tubing column, an expansion ring fixedly connected to the outside of the connecting portion, a first sealing ring fitted on the outside of the connecting portion and at the bottom of the expansion ring, and a cleaning ring fixedly connected to the outside of the connecting portion and near the top.

[0007] Preferably, the sealing element includes a sealing ring placed inside the tube body and near the bottom, a second sealing ring is fitted on the outer side of the sealing element, a flow guide hole is provided at the bottom of the sealing ring, and a sealing ball is placed inside the sealing ring.

[0008] Preferably, the sealing element further includes four fixing grooves arranged circumferentially on the outer side of the sealing ring, an elastic frame is fixedly connected to the inner side of the fixing groove, a locking plate is fixedly connected to one side of the elastic frame, and four locking grooves arranged circumferentially are opened on the inner side of the tube near the bottom, and the locking plate is slidably connected to the fixing groove and does not detach.

[0009] Preferably, the connector includes four circumferentially arranged connecting blocks that are fixedly connected to the bottom of the connecting part, and the top of the sealing ring has a notch, and four locking baffles arranged in a principle are fixedly connected to the inside of the notch and near the top.

[0010] Preferably, a dust-proof ring is fitted on the outer side of the central rod and near the top.

[0011] Preferably, a plurality of circumferentially arranged sealing rings are fixedly connected to the outer side of the tube and near both sides.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The center rod is tubular. The top of the center rod can be connected to the pipe of the water pump through the connection port. The center rod is fixed to the expansion member through the pipe column. Then, the center rod drives the expansion member to be inserted into the pipe body. The sealing member is pre-placed at the bottom of the inner side of the pipe body and clamped to fix it, so that a sealing cavity is formed between the expansion member and the sealing member. The external water pump injects water into the sealing cavity between the expansion member and the sealing member through the center rod to increase the pressure, so that the expansion member squeezes the pipe body to expand and expand and fit tightly with the sleeve, improving the convenience and stability of reinforcing and repairing the sleeve.

[0014] 2. The first sealing ring on the outer side of the expansion ring increases the sealing between the expansion ring and the pipe body. The central rod drives the expansion ring into the pipe body through the connecting part at the bottom of the pipe column. The outer side of the expansion ring has a protrusion, which is connected to the water pump through the connecting port. The water pump injects water into the cavity at the bottom of the expansion ring through the central rod to increase the pressure, so that the expansion ring moves upward and squeezes the pipe body at the same time. The cleaning ring on the outer side of the connecting part can scrape and clean the dirt in the pipe body. Due to the high plasticity and ductility of the pipe body, the expansion ring squeezes the pipe body to expand and fit tightly against the inner wall of the sleeve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a left-side sectional perspective view of the overall structure of this utility model;

[0017] Figure 3 The overall structure of this utility model Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 The overall structure of this utility model Figure 2 Enlarged view at point B in the middle;

[0019] Figure 5 The overall structure of this utility model Figure 2 Enlarged view at point C;

[0020] Figure 6 This is a schematic diagram of the sealing ring, connecting block, notch, and locking baffle in the overall structure of this utility model.

[0021] In the diagram: 1. Pipe body; 2. Central rod; 3. Connecting port; 4. Pipe column; 5. Connecting part; 6. Expansion ring; 7. First sealing ring; 8. Cleaning ring; 9. Sealing ring; 10. Second sealing ring; 11. Guide hole; 12. Sealing ball; 13. Fixing groove; 14. Elastic frame; 15. Locking plate; 16. Locking groove; 17. Connecting block; 18. Notch; 19. Locking baffle; 20. Dustproof ring; 21. Sealing rubber ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Please refer to Figure 1-6 As shown, this utility model provides a water-filled expansion device for expanding alloy tubes, including an alloy tube body 1, a central rod 2 movably connected to the inner side of the tube body 1, a connection port 3 installed at the top of the central rod 2, a sealing element installed on the inner side of the tube body 1 near the bottom, a tube column 4 fixedly connected to the bottom of the central rod 2, a dustproof ring 20 fitted on the outer side of the central rod 2 near the top, an expansion element screwed to the outer side of the tube column 4, a connecting element installed between the expansion element and the sealing element, and a plurality of circumferentially arranged sealing rings 21 fixedly connected to the outer side of the tube body 1 near both sides.

[0025] It should be added that the dustproof ring 20 can prevent foreign objects from falling into the pipe body 1 during well construction. The center rod 2 is tubular, and the top of the center rod 2 can be connected to the pipeline connected to the water injection pump through the connection port 3. The center rod 2 is screwed to the expansion member through the pipe string 4. Then, the center rod 2 drives the expansion member to be inserted into the pipe body 1. The sealing member is pre-placed on the bottom of the inner side of the pipe body 1 and clamped to form a sealing cavity between the expansion member and the sealing member. The external water pump injects water into the sealing cavity between the expansion member and the sealing member through the center rod 2 to increase the pressure, so that the expansion member squeezes the pipe body 1 to expand and expand and fit tightly with the casing. After the pipe body 1 expands and squeezes, multiple sealing rings 21 play the role of anchoring / sealing and fixing the pipe body 1, improving the convenience and stability of reinforcing and repairing the casing.

[0026] Specifically, the expansion component includes a connecting part 5 screwed to the outside of the tubing column 4, an expansion ring 6 fixedly connected to the outside of the connecting part 5, a first sealing ring 7 fitted to the outside of the connecting part 5 and at the bottom of the expansion ring 6, and a cleaning ring 8 fixedly connected to the outside of the connecting part 5 and near the top.

[0027] The tubing 4 and the connecting part 5 can be directly disassembled by screwing. In case of extreme jamming, the tubing 4 and the connecting part 5 are separated by rotating the tightly closed direction to disengage the expansion ring 6, and the tubing 4 is removed for further processing. The first sealing ring 7 on the outer side of the expansion ring 6 increases the sealing between the expansion ring 6 and the tube body 1. The central rod 2 drives the expansion ring 6 into the tube body 1 through the connecting part 5 at the bottom of the tubing 4. The outer side of the expansion ring 6 has a protrusion that is connected to the water pump through the connecting port 3. The water pump injects water into the cavity at the bottom of the expansion ring 6 through the central rod 2 to increase the pressure, so that the expansion ring 6 moves upward and squeezes the tube body 1. The cleaning ring 8 on the outer side of the connecting part 5 can scrape and clean the dirt inside the tube body 1, clean the foreign objects on the inner wall of the tube body 1, and prevent the expansion ring 6 from jamming. Because the tube body 1 has high plasticity and ductility, the expansion ring 6 squeezes the tube body 1 to expand and fit tightly against the inner wall of the sleeve.

[0028] More specifically, the sealing element includes a sealing ring 9 placed inside the tube body 1 near the bottom, a second sealing ring 10 fitted on the outer side of the sealing element, a guide hole 11 at the bottom of the sealing ring 9, a sealing ball 12 placed inside the sealing ring 9, and four fixing grooves 13 arranged circumferentially on the outer side of the sealing ring 9. An elastic frame 14 is fixedly connected to the inner side of the fixing grooves 13, and a locking plate 15 is fixedly connected to one side of the elastic frame 14. Four locking grooves 16 are arranged circumferentially on the inner side of the tube body 1 near the bottom. The locking plate 15 is slidably connected to the fixing grooves 13 and does not detach.

[0029] As should be added, the sealing ring 9 is placed at the bottom of the inner side of the tube body 1. The locking plate 15 squeezes the elastic frame 14, causing the sealing ring 9 to continue to move upward. When the pressure is released, the elastic frame 14 can squeeze and push the locking plate 15. Then, the four locking plates 15 are inserted into the locking groove 16 to clamp and fix the sealing ring 9, increasing the stability of the sealing ring 9. The second sealing ring 10 on the outer side of the sealing ring 9 is tightly fitted with the inner side of the tube body 1. The sealing ball 12 is inserted into the guide hole 11 at the center of the sealing ring 9 through the central rod 2 to clamp and seal the sealing ring 9.

[0030] Furthermore, the connector includes four circumferentially arranged connecting blocks 17 that are fixedly connected to the bottom of the connecting part 5, and a notch 18 is provided at the top of the sealing ring 9. Four locking baffles 19 are fixedly connected to the inner side of the notch 18 and near the top.

[0031] The connecting block 17 has an L-shaped cross-section and the notch 18 is annular. After the sleeve expands and fits tightly against the inner wall of the sleeve, a rod-shaped tool with a magnet is inserted into the inner side of the central rod 2. Then, the magnetic strip block magnetically attracts the sealing ball 12 and moves upward to disengage from the guide hole 11. Then, the water between the sealing ring 9 and the expansion ring 6 is guided downward. Then, the central rod 2 drives the connecting block 17 to be inserted into the notch 18 through the connecting part 5. Then, the central rod 2 is rotated so that it drives the connecting block 17 to fit against the locking baffle 19. This allows the locking baffle 19 to drive the sealing ring 9 to move upward and disengage from the pipe body 1.

[0032] Working principle: First, the tube body 1 is placed inside the sleeve. Then, the sealing ball 12 is inserted into the guide hole 11 at the center of the sealing ring 9 through the central rod 2, so that the sealing ball 12 clamps and seals the sealing ring 9. At the same time, the second sealing ring 10 on the outside of the sealing ring 9 is tightly fitted to the inner wall of the sleeve. Next, an external water pump is used to inject water into the cavity at the bottom of the expansion ring 6 through the central rod 2 to increase the pressure. At this time, the water in the sealing cavity between the sealing ring 9 and the expansion ring 6 is continuously injected and pressurized to push the expansion ring 6 to move upward. At the same time, the expansion ring 6 squeezes the tube body 1. Then, the cleaning ring 8 on the outside of the connecting part 5 scrapes and cleans the dirt inside the tube body 1. Then, the multiple sealing rings 21 on the outside of the tube body 1 play the role of anchoring / sealing and fixing the tube body 1.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A water-filling expansion device for alloy pipe expansion, comprising a pipe body (1) of an alloy pipe, characterized by: The pipe body (1) is movably connected with a center rod (2), the top of the center rod (2) is provided with a connecting port (3), the inner side of the pipe body (1) and close to the bottom is provided with a sealing element, the bottom of the center rod (2) is fixedly connected with a pipe column (4), the outer side of the pipe column (4) is screwed with an expansion element, and the expansion element is connected with the sealing element.

2. The water-filling expansion device for alloy tube expansion according to claim 1, characterized by: The expansion element comprises a connecting portion (5) screwed with the outer side of the pipe column (4), the outer side of the connecting portion (5) is fixedly connected with an expansion ring (6), the outer side of the connecting portion (5) and close to the bottom of the expansion ring (6) is sleeved with a first sealing ring (7), and the outer side of the connecting portion (5) and close to the top is fixedly connected with a cleaning ring (8).

3. The water-filling expansion device for alloy tube expansion according to claim 2, characterized by: The sealing element comprises a sealing ring (9) placed on the inner side of the pipe body (1) and close to the bottom, the outer side of the sealing ring (9) is sleeved with a second sealing ring (10), the bottom of the sealing ring (9) is provided with a flow guide hole (11), and the inner side of the sealing ring (9) is placed with a sealing ball (12).

4. The water-filling expansion device for alloy tube expansion according to claim 3, characterized by: The sealing element further comprises four fixed grooves (13) arranged in a circle on the outer side of the sealing ring (9), the inner side of the fixed groove (13) is fixedly connected with an elastic frame (14), one side of the elastic frame (14) is fixedly connected with a lock plate (15), the inner side of the pipe body (1) and close to the bottom is provided with four lock grooves (16) arranged in a circle, and the lock plate (15) is slidably connected with the fixed groove (13) and does not come off.

5. The water-filling expansion device for alloy tube expansion according to claim 4, characterized by: The connecting element comprises four connecting blocks (17) arranged in a circle and fixedly connected with the bottom of the connecting portion (5), the top of the sealing ring (9) is provided with a notch (18), the inner side of the notch (18) and close to the top is fixedly connected with four lock baffle plates (19) arranged in a circle.

6. The water-filling expansion device for alloy tube expansion according to claim 1, characterized by: The outer side of the center rod (2) and close to the top is sleeved with a dustproof ring (20).

7. The water-filling expansion device for alloy tube expansion according to claim 1, characterized by: The outer side of the pipe body (1) and close to both sides is respectively fixedly connected with a plurality of sealing rubber rings (21) arranged in a circle.

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