A steel pipe pile for water conservancy project construction and modified coated anti-corrosion belt

Abstract

The present invention relates to the technical field of foundation piles, specifically a steel pipe pile for water conservancy project construction and a modified coated anti-corrosion belt, comprising a pipe body, the outer wall of the pipe body is coated with a petrolatum anti-corrosion paste for preventing the corrosion of the pipe body, the outer wall of the pipe body is wrapped with a spiral sealing buffer layer and a spiral sealing layer, the middle part of the spiral sealing layer is coupled with the spiral sealing buffer layer, and the top and bottom of the spiral sealing layer are spliced ​​in a circular ring shape. The gap in the middle of the spiral sealing buffer layer can be entered by rotation, and the spiral sealing layer can be filled with anti-corrosion liquid. In the process of filling with anti-corrosion liquid, the spiral sealing layer expands and presses against the spiral sealing buffer layer to achieve sealing of the inner outer wall of the pipe body. If the spiral sealing layer is damaged, the internal anti-corrosion liquid will flow out, and the sealing operation can still be achieved. The staff can observe the internal liquid level of the spiral sealing layer on the ground to determine whether the spiral sealing layer or the spiral sealing buffer layer placed underground is damaged.

Description

Technical Field

[0001] The invention relates to the technical field of foundation piles, in particular to a steel pipe pile for water conservancy project construction and a modified coated anti-corrosion belt. Background Art

[0002] Pile foundation is a deep foundation form, mainly composed of piles and pile caps (referred to as caps) connected to the top of the piles, or composed of single pile foundations connected to the column and the pile foundation. Steel pipe piles are composed of steel pipes, tongue and groove grooves, tongue and groove pins and other components. Among them, the left end of the diameter of the steel pipe is vertically connected to the tongue and groove groove. The cross section of the tongue and groove groove is a square frame with one side open, and the side is provided with reinforcing ribs; and the right end of the diameter of the steel pipe is vertically connected to the wall and the radial position. The groove section of the tongue and groove pin is I-shaped. In addition, steel pipe piles also include various types such as non-circular cross-sectional profiles, equal wall thickness, variable wall thickness, variable diameter and variable wall thickness along the length direction, symmetrical and asymmetrical cross-sections, such as square, rectangular, conical, trapezoidal, spiral pipes, etc. Steel pipe piles are prone to corrosion when buried underground for a long time, so they are anti-corrosive by coating with anti-corrosion tapes to increase the life of steel pipe piles.

[0003] Traditional coating anti-corrosion belts are mostly directly coated on the outer wall of the steel pipe pile, and then coated with a buffer layer, an anti-corrosion cover, etc. The steel pipe pile part will be buried underground. If the underground coating anti-corrosion belt is damaged, it cannot be discovered in time, which may cause the internal steel pipe pile to corrode quickly, and the coating anti-corrosion belt cannot be replaced even if it is damaged. For example, the authorized patent number CN207349693U discloses a marine bio-resistant steel pipe anti-corrosion winding belt, which is wrapped around the outer wall of the steel pipe to achieve corrosion protection, but it cannot be discovered and replaced in time when it is damaged. Summary of the invention

[0004] In response to the problems in the prior art, the present invention provides a steel pipe pile and a modified coated anti-corrosion belt for water conservancy project construction. If the spiral sealing layer is damaged, the internal anti-corrosion liquid will flow out and the sealing operation can still be achieved. The staff can observe the internal liquid level of the spiral sealing layer on the ground to determine whether the spiral sealing layer or the spiral sealing buffer layer placed underground is damaged. If the spiral sealing layer is missing, it can be determined by observing the liquid level of the spiral sealing layer on the ground, and the spiral sealing layer can be pulled out from the spiral sealing buffer layer to achieve replacement of the spiral sealing layer.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a steel pipe pile for water conservancy project construction, including a pipe body, the outer wall of the pipe body is coated with a petrolatum anti-corrosion paste for preventing corrosion of the pipe body, the outer wall of the pipe body is wrapped with a spiral sealing buffer layer and a spiral sealing layer, the middle part of the spiral sealing layer is coupled with the spiral sealing buffer layer, and the top and bottom of the spiral sealing layer are spliced ​​in a circular ring shape.

[0006] Specifically, the diameter of the tube body 2 is between 1700mm and 2000mm, and the wall thickness of the tube body 2 is between 10mm and 20mm; a guide cone is integrally formed at one end of the tube body, and the angle between the outer wall slope of the guide cone and the bottom near one end of the tube body is 60°, and the guide cone is smaller than the thickness of the tube body.

[0007] Specifically, a sealing ring is fixedly connected to one end of the tube body close to the guide cone, and the height of the sealing ring is smaller than the height of the guide cone.

[0008] Specifically, the sealing ring is arranged in a frustum ring shape, the length of the bottom of one end of the sealing ring close to the tube body is smaller than the diameter of one end of the sealing ring away from the tube body, and the end of the sealing ring away from the tube body is provided with an arc surface.

[0009] Specifically, a sealing groove is formed at one end of the tube body away from the guide cone, and the sealing ring is arranged in cooperation with the sealing groove.

[0010] Specifically, the outer wall fixing sleeve of the spiral sealing buffer layer is provided with an outer anti-corrosion cover.

[0011] The present invention also provides a modified coated anti-corrosion belt, the spiral sealing layer includes a spiral belt, the spiral belt is hollow, and both ends of the spiral belt are provided with connecting parts, the connecting parts include a bottom connecting head and a connecting ring, the bottom connecting head and the connecting ring are respectively arranged at the circular annular ends of the top and bottom of the spiral belt, and the bottom connecting head and the connecting ring are arranged one by one.

[0012] Specifically, a conical interface is arranged at the bottom of the bottom connector, a built-in clearance cavity is arranged on the inner wall of the bottom connector, and a sealing sheet is arranged in the built-in clearance cavity.

[0013] Specifically, the inner wall of the built-in giving way cavity is fixedly connected to a guide rod, the sealing plate is slidably sleeved on the outer wall of the guide rod, the outer wall of the guide rod is provided with a sealing spring, one end of the sealing spring is fixedly connected to the top of the built-in giving way cavity, and the other end of the sealing spring is in contact with the sealing plate.

[0014] Specifically, a ejector pin is fixedly arranged in the middle of the connecting ring, and the ejector pin is arranged in cooperation with the sealing sheet.

[0015] Specifically, a yielding spiral groove is provided on the outer wall of the spiral sealing buffer layer on one side close to the spiral belt, and spiral protrusions are provided on the side walls of the spiral belt, and the spiral protrusions are placed in the yielding spiral groove.

[0016] Beneficial effects of the invention: Compared with the prior art, the steel pipe pile and modified coated anti-corrosion belt for water conservancy project construction described in the invention can enter the gap in the middle of the spiral sealing buffer layer through rotation, and the spiral sealing layer can be filled with anti-corrosion liquid. During the process of filling with anti-corrosion liquid, the spiral sealing layer expands and presses against the spiral sealing buffer layer to achieve sealing of the outer wall of the internal pipe body and achieve anti-corrosion. If the spiral sealing layer is damaged, the internal anti-corrosion liquid will flow out, and the sealing operation can still be achieved. The staff can observe the internal liquid level of the spiral sealing layer on the ground to determine whether the spiral sealing layer or the spiral sealing buffer layer placed underground is damaged. If the spiral sealing layer is missing, it can be judged by observing the liquid level of the spiral sealing layer on the ground, and the spiral sealing layer can be pulled out from the spiral sealing buffer layer to achieve replacement of the spiral sealing layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a diagram showing the connection between the spiral sealing buffer layer, the spiral sealing layer and the pipe body of the present invention;

[0020] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at A in the middle;

[0021] Figure 4 For the present invention Figure 1 Axis view of

[0022] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at B in the middle;

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of the spiral sealing buffer layer of the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the spiral sealing layer of the present invention;

[0025] Figure 8 is a cross-sectional view of the bottom connector of the present invention;

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of the sealing ring of the present invention.

[0027] In the figure: 1. External anti-corrosion cover;

[0028] 2. Tube body; 21. Sealing groove; 23. Guide cone; 24. Sealing ring; 241. Arc surface;

[0029] 3. Spiral sealing buffer layer; 31. Give way spiral groove;

[0030] 4. spiral sealing layer; 41. connecting ring; 42. ejector pin; 43. spiral belt; 44. spiral protrusion;

[0031] 6. Bottom connector; 61. Built-in clearance cavity; 62. Guide rod; 63. Sealing spring; 64. Sealing sheet; 65. Conical interface. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] like Figure 1-Figure 9 As shown, a steel pipe pile for water conservancy project construction of the present invention includes a pipe body 2, the outer wall of the pipe body 2 is coated with a petrolatum anti-corrosion paste for preventing the pipe body 2 from corroding, the outer wall of the pipe body 2 is wrapped with a spiral sealing buffer layer 3 and a spiral sealing layer 4, the middle part of the spiral sealing layer 4 is coupled with the spiral sealing buffer layer 3, and the top and bottom of the spiral sealing layer 4 are both in a circular ring shape.

[0034] The spiral sealing buffer layer 3 and the spiral sealing layer 4 jointly form an anti-corrosion layer. The spiral sealing buffer layer 3 is a hard buffer material, which can achieve buffering and simultaneously achieve sealing and anti-corrosion with the spiral sealing layer 4. The spiral sealing layer 4 is a soft material and can enter the gap in the middle of the spiral sealing buffer layer 3 by rotation. The spiral sealing layer 4 can be filled with anti-corrosion liquid. During the process of filling with anti-corrosion liquid, the spiral sealing layer 4 expands and presses against the spiral sealing buffer layer 3 to achieve sealing of the outer wall of the internal pipe body 2 and achieve anti-corrosion. If the spiral sealing layer 4 is damaged, the internal anti-corrosion liquid will flow out and the sealing operation can still be achieved. The staff can observe the internal liquid level of the spiral sealing layer 4 on the ground to determine whether the spiral sealing layer 4 or the spiral sealing buffer layer 3 placed underground is damaged. If the spiral sealing layer 4 is missing, it can be judged by observing the liquid level of the spiral sealing layer 4 on the ground, and the spiral sealing layer 4 can be pulled out from the spiral sealing buffer layer 3 to achieve replacement of the spiral sealing layer 4.

[0035] The outer wall of the tube body 2 is further protected from corrosion by using petrolatum anti-corrosion paste.

[0036] Specifically, the diameter of the tube body 2 is between 1700 mm and 2000 mm, and the wall thickness of the tube body 2 is between 10 mm and 20 mm.

[0037] The diameter of the tube body 2 is between 1700 mm and 2000 mm and the wall thickness is between 10 mm and 20 mm, which can achieve sufficient supporting force.

[0038] A guide cone 23 is integrally formed at one end of the tube body 2 , and the angle between the outer wall slope of the guide cone 23 and the bottom of the end close to the tube body 2 is 60°. The guide cone 23 is smaller than the thickness of the tube body 2 .

[0039] The guide cone 23 has an included angle of 60°. When the two groups of tube bodies 2 are connected, the guide cone 23 can play a guiding role, which facilitates the two groups of tube bodies 2 to be connected more quickly and can prevent deviations. When designing, reducing the thickness of the guide cone 23 can save raw materials while ensuring rigidity and reduce resource waste during production.

[0040] Specifically, a sealing ring 24 is fixedly connected to one end of the tube body 2 close to the guide cone 23, and the height of the sealing ring 24 is smaller than the height of the guide cone 23;

[0041] The sealing ring 24 is arranged in a frustum ring shape, the length of the sealing ring 24 at one end close to the tube body 2 is smaller than the diameter of the sealing ring 24 at one end away from the tube body 2, and the sealing ring 24 at one end away from the tube body 2 is provided with an arc surface 241;

[0042] A sealing groove 21 is formed at one end of the tube body 2 away from the guide cone 23 , and the sealing ring 24 is arranged in cooperation with the sealing groove 21 .

[0043] When two tube bodies 2 are docked, the guide cone 23 of one tube body 2 is first plugged into the end of the other tube body 2. Guiding by the guide cone 23 can avoid the phenomenon of the sealing ring 24 deviating from the sealing groove 21 when connected. The bottom of the sealing ring 24 is provided with an arc surface 241 to facilitate the sealing ring 24 to enter the sealing groove 21, thereby achieving sealing at the connection between the two tube bodies 2. The sealing ring 24 and the sealing groove 21 have an interference fit, which can achieve sealing at the contact position.

[0044] Specifically, the outer wall of the spiral sealing buffer layer 3 is fixedly sleeved with an outer anti-corrosion cover 1 .

[0045] The surface of the external anti-corrosion cover 1 is sandblasted to remove oxides and dirt, thereby increasing the adhesion of the coating. The surface of the external anti-corrosion cover 1 is coated with an anti-corrosion coating, such as epoxy resin coating, polyurethane coating, etc., to increase the anti-corrosion effect.

[0046] The present invention also provides a modified coated anti-corrosion belt, wherein the spiral sealing layer 4 includes a spiral belt 43, the spiral belt 43 is hollow, and both ends of the spiral belt 43 are provided with connecting parts, the connecting parts include a bottom connecting head 6 and a connecting ring 41, the bottom connecting head 6 and the connecting ring 41 are respectively arranged at the circular annular ends of the top and bottom of the spiral belt 43, and the bottom connecting head 6 and the connecting ring 41 are arranged one by one.

[0047] The spiral belt 43 and the spiral sealing buffer layer 3 are arranged in cooperation to achieve sealing and anti-corrosion. At the same time, by injecting anti-corrosion liquid into the spiral belt 43, the spiral belt 43 can be expanded to press against the spiral sealing buffer layer 3 to increase the sealing performance. By observing the liquid level in the spiral belt 43 placed on the ground, it is helpful to timely find out whether the spiral belt 43 is damaged. By rotating the top spiral belt 43, the spiral belt 43 can be taken out for replacement;

[0048] The bottom connector 6 can move to the bottom synchronously when the spiral belt 43 rotates to the bottom, and dock with the connecting ring 41 set on the top of another group of spiral belts 43. After the bottom connector 6 is docked with the other group of connecting rings 41, the antiseptic liquid in the two groups of spiral belts 43 can be communicated with each other, so that it can be realized whether multiple groups of spiral belts 43 are leaking by only looking at the liquid level of the top group of spiral belts 43.

[0049] Specifically, a conical interface 65 is provided at the bottom of the bottom connector 6 , a built-in clearance cavity 61 is provided on the inner wall of the bottom connector 6 , and a sealing sheet 64 is provided in the built-in clearance cavity 61 .

[0050] When the bottom connector 6 is not connected, it is sealed by the sealing sheet 64 to prevent leakage of the internal anti-corrosion liquid. Before the tube body 2 is installed, the anti-corrosion liquid does not need to be injected into the spiral belt 43, which can reduce the overall transportation weight and facilitate the transportation of the tube body 2. The anti-corrosion liquid can be injected after the installation of the tube body 2 is completed. This is convenient and quick, and the sealing can also be increased by the injection of the anti-corrosion liquid.

[0051] Specifically, the inner wall of the built-in give way cavity 61 is fixedly connected to a guide rod 62, the sealing sheet 64 is slidably sleeved on the outer wall of the guide rod 62, the outer wall of the guide rod 62 is provided with a sealing spring 63, one end of the sealing spring 63 is fixedly connected to the top of the built-in give way cavity 61, and the other end of the sealing spring 63 is in contact with the sealing sheet 64.

[0052] When the bottom connector 6 is not connected, the sealing spring 63 can press the sealing sheet 64 tightly, thereby sealing the bottom of the bottom connector 6 to prevent leakage of the preservative liquid. The sealing sheet 64 is made of a hard material, and the movement trajectory of the sealing sheet 64 can be limited by the guide rod 62.

[0053] Specifically, a ejector pin 42 is fixedly disposed in the middle of the connecting ring 41 , and the ejector pin 42 is matched with the sealing sheet 64 .

[0054] When the bottom connector 6 is connected to another set of connecting rings 41, the bottom connector 6 rotates to the middle of the connecting rings 41, and moves downward during the rotation. Figure 3As shown, grooves are provided on both sides of the connecting ring 41 , and after the bottom connecting head 6 rotates to the inside of the corresponding connecting ring 41 , the ejector pin 42 will slowly lift up the sealing sheet 64 , thereby achieving the connection between the two sets of spiral belts 43 .

[0055] Specifically, a yielding spiral groove 31 is formed on the outer wall of the spiral sealing buffer layer 3 on the side close to the spiral belt 43 , and spiral protrusions 44 are disposed on the side walls of the spiral belt 43 . The spiral protrusions 44 are placed in the yielding spiral groove 31 .

[0056] During the rotation process, the spiral belt 43 can drive the spiral protrusions 44 set on both sides to move along the give-way spiral groove 31, and the give-way spiral groove 31 plays a guiding role. At the same time, when the spiral belt 43 is injected with preservative liquid, the spiral protrusions 44 on both sides will expand and press against the inner wall of the give-way spiral groove 31, thereby achieving better sealing.

[0057] Working principle: the spiral sealing layer 4 can be filled with antiseptic liquid. During the filling process, the spiral sealing layer 4 expands and presses against the spiral sealing buffer layer 3. The spiral sealing layer 4 is made of transparent material, which can realize the observation of the liquid level. The outer antiseptic cover 1 placed outside the spiral belt 43 is correspondingly provided with an observation port for observing the liquid level inside the spiral belt 43. A group of spiral belts 43 at the top of the group are placed on the top position on the ground to be exposed to the outside. When replacement is needed, it is only necessary to rotate the top spiral belt 43 to take it out. The spiral belt 43 can be rotated and pulled out by external force.

[0058] The bottom connector 6 can move to the bottom synchronously when the spiral belt 43 rotates to the bottom, and dock with the connecting ring 41 set on the top of another group of spiral belts 43. When the bottom connector 6 is docked with the other group of connecting rings 41, the antiseptic liquid in the two groups of spiral belts 43 can be communicated with each other, so that it can be realized whether multiple groups of spiral belts 43 are leaking by only looking at the liquid level of the top group of spiral belts 43; after docking, it is in a locked state. During subsequent maintenance and replacement, when the top spiral belt 43 is driven to rotate by an external machine, it can drive other spiral belts 43 to rotate and be taken out together.

[0059] When the bottom connector 6 is not connected, the sealing spring 63 can press the sealing sheet 64 tightly, thereby sealing the bottom of the bottom connector 6 to prevent leakage of the preservative liquid. The sealing sheet 64 is made of a hard material, and the movement trajectory of the sealing sheet 64 can be limited by the guide rod 62.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A steel pipe pile for water conservancy project construction, characterized in that: The invention comprises a tube body (2), the outer wall of the tube body (2) is coated with a petrolatum anti-corrosion paste for preventing the tube body (2) from corroding, the outer wall of the tube body (2) is wrapped with a spiral sealing buffer layer (3) and a spiral sealing layer (4), The middle part of the spiral sealing layer (4) is coupled with the spiral sealing buffer layer (3), and the top and bottom of the spiral sealing layer (4) are spliced ​​to form a circular ring.

2. The steel pipe pile for water conservancy project construction according to claim 1, characterized in that: The diameter of the tube body (2) is between 1700 mm and 2000 mm, and the wall thickness of the tube body (2) is between 10 mm and 20 mm; A guide cone (23) is integrally formed at one end of the tube body (2), the angle between the outer wall slope of the guide cone (23) and the bottom of the end close to the tube body (2) is 60°, and the guide cone (23) is smaller than the thickness of the tube body (2).

3. A steel pipe pile for water conservancy project construction according to claim 2, characterized in that: A sealing ring (24) is fixedly connected to one end of the tube body (2) close to the guide cone (23); the height of the sealing ring (24) is smaller than the height of the guide cone (23).

4. The steel pipe pile for water conservancy project construction according to claim 3, characterized in that: The sealing ring (24) is arranged in a frustum ring shape, the length of the end of the sealing ring (24) close to the tube body (2) is smaller than the diameter of the end of the sealing ring (24) away from the tube body (2), and the end of the sealing ring (24) away from the tube body (2) is provided with an arc surface (241).

5. The steel pipe pile for water conservancy project construction according to claim 4, characterized in that: A sealing groove (21) is provided at one end of the tube body (2) away from the guide cone (23), and the sealing ring (24) is arranged in cooperation with the sealing groove (21).

6. The steel pipe pile for water conservancy project construction according to claim 1, characterized in that: The outer wall of the spiral sealing buffer layer (3) is fixedly sleeved with an outer anti-corrosion cover (1).

7. A modified coated anti-corrosion belt, suitable for the steel pipe pile for water conservancy project construction according to any one of claims 1 to 6, characterized in that: The spiral sealing layer (4) comprises a spiral belt (43), the spiral belt (43) is hollow, and both ends of the spiral belt (43) are provided with connecting pieces, the connecting pieces comprising a bottom connecting head (6) and a connecting ring (41), the bottom connecting head (6) and the connecting ring (41) are respectively arranged at the circular annular ends at the top and bottom of the spiral belt (43), and the bottom connecting head (6) and the connecting ring (41) are arranged in a one-to-one correspondence.

8. The modified coated anti-corrosion belt according to claim 7, characterized in that: The bottom of the bottom connector (6) is provided with a conical interface (65), the inner wall of the bottom connector (6) is provided with a built-in clearance cavity (61), and a sealing sheet (64) is provided in the built-in clearance cavity (61).

9. A modified coated anti-corrosion belt according to claim 8, characterized in that: The inner wall of the built-in clearance cavity (61) is fixedly connected to a guide rod (62), the sealing sheet (64) is slidably sleeved on the outer wall of the guide rod (62), the outer wall of the guide rod (62) is provided with a sealing spring (63), one end of the sealing spring (63) is fixedly connected to the top of the built-in clearance cavity (61), and the other end of the sealing spring (63) is in contact with the sealing sheet (64).

10. The modified coated anti-corrosion belt according to claim 8, characterized in that: A ejector pin (42) is fixedly disposed in the middle of the connecting ring (41), and the ejector pin (42) is arranged in cooperation with the sealing sheet (64).

11. The modified coated anti-corrosion belt according to claim 7, characterized in that: The outer wall of the spiral sealing buffer layer (3) on the side close to the spiral band (43) is provided with a giving way spiral groove (31), and the side walls of the spiral band (43) are provided with spiral protrusions (44), and the spiral protrusions (44) are placed in the giving way spiral groove (31).

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