A seamless steel pipe for high-pressure boilers

Abstract

This utility model discloses a seamless steel pipe for high-pressure boilers, belonging to the technical field of seamless steel pipes. It includes a seamless steel pipe with a pipe connection device located in the middle of its outer surface. The inner wall of the seamless steel pipe is coated with a galvanized layer, and the inner wall of the galvanized layer is coated with a ceramic coating. The outer surface of the seamless steel pipe has heat dissipation holes. This seamless steel pipe for high-pressure boilers simplifies the connection process by using a semi-circular fixed pipe and a semi-circular mating disc that cooperate with a mating convex shaft and an arc-shaped mating groove. Simply insert the mating convex shaft into the arc-shaped mating groove, and then tighten the two semi-circular fixed pipes with fixing screws. This greatly improves installation efficiency. Simultaneously, the double sealing design using a rubber sealing ring and a sealing rubber gasket effectively ensures the sealing of the connection points, reduces the risk of leakage, and improves the safety and stability of the seamless steel pipe.

Description

Technical Field

[0001] This utility model belongs to the field of seamless steel pipe technology, specifically a seamless steel pipe for high-pressure boilers. Background Technology

[0002] Seamless steel tubes for high-pressure boilers are a type of boiler tube, mainly used to manufacture superheater tubes, reheater tubes, steam pipes, and main steam pipes for high-pressure and ultra-high-pressure boilers. Due to the special nature of their operating environment, the performance requirements for the steel tubes are extremely stringent, requiring high strength, high resistance to oxidation and corrosion, and good stability. Currently, existing seamless steel tubes are generally connected and fixed using simple bolts. The installation process of existing seamless steel tubes is relatively complex and inconvenient, and it is difficult to guarantee the sealing and stability after connection, which can easily lead to safety hazards such as leakage. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a seamless steel pipe for high-pressure boilers, which solves the problems that the connection method is relatively complicated and inconvenient to operate during the installation of seamless steel pipes, and that it is difficult to guarantee the sealing and stability after connection, which can easily lead to safety hazards such as leakage.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a seamless steel pipe for high-pressure boilers, comprising a seamless steel pipe, a pipe connection device provided in the middle of the outer surface of the seamless steel pipe, a galvanized layer provided on the inner wall of the seamless steel pipe, a ceramic coating provided on the inner wall of the galvanized layer, heat dissipation holes provided on the outer surface of the seamless steel pipe, and a polyurethane insulation layer provided on the outer surface of the heat dissipation holes.

[0007] As a further embodiment of this utility model: the pipe connection device includes a semi-circular fixed pipe sleeved on the outer surface of a seamless steel pipe, a semi-circular mating plate fixedly installed on the inner side of the semi-circular fixed pipe, a connecting bracket fixedly installed on the outer surface of the semi-circular fixed pipe, a fixing screw running through the inside of the connecting bracket, a sealing rubber gasket fixedly installed on the inner wall of the semi-circular fixed pipe, a mating convex shaft fixedly installed on the left side of the semi-circular mating plate on the right side, and an arc-shaped mating groove opened on the left side of the semi-circular mating plate on the left side.

[0008] As a further embodiment of this utility model: the connecting bracket has a fixed threaded hole inside, which is adapted to the fixed screw.

[0009] As a further embodiment of this utility model: the mating convex shaft is inserted into the interior of the arc-shaped mating groove and slides inside the arc-shaped mating groove.

[0010] As a further embodiment of this utility model: the inner surface of the semi-circular mating disc is provided with a rubber sealing ring, and the two sets of rubber sealing rings fit together.

[0011] As a further aspect of this utility model, the dimensions of the seamless steel pipe are adapted to the dimensions of the semi-circular fixed pipe.

[0012] (III) Beneficial Effects

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The seamless steel pipe for this high-pressure boiler uses a semi-circular fixed pipe and a semi-circular mating plate that work together with the mating convex shaft and the arc-shaped mating groove. This makes the connection of the seamless steel pipe much simpler. Simply insert the mating convex shaft into the arc-shaped mating groove, and then tighten the two semi-circular fixed pipes with the fixing screws. This greatly improves the installation efficiency. At the same time, the double sealing design of the rubber sealing ring and the sealing rubber gasket effectively ensures the sealing of the connection, reduces the risk of leakage, and improves the safety and stability of the seamless steel pipe.

[0015] 2. The seamless steel pipe used in this high-pressure boiler can effectively prevent the inner wall of the seamless steel pipe from rusting by setting a galvanized layer, thereby improving the corrosion resistance of the steel pipe. The ceramic coating has good high temperature resistance and wear resistance. The heat dissipation holes can dissipate the heat generated by the seamless steel pipe during operation in a timely manner. The polyurethane insulation layer can insulate the seamless steel pipe on the basis of heat dissipation, thereby reducing heat loss. Attached Figure Description

[0016] Figure 1 , Figure 2 This is a schematic diagram of the structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the pipe connection device of this utility model;

[0018] In the diagram: 1. Seamless steel pipe; 2. Pipe connection device; 201. Semi-circular fixed pipe; 202. Semi-circular mating plate; 203. Connecting bracket; 204. Fixing screw; 205. Sealing rubber gasket; 206. Butt joint convex shaft; 207. Arc-shaped butt joint groove; 3. Galvanized layer; 4. Ceramic coating; 5. Heat dissipation holes; 6. Polyurethane insulation layer. Detailed Implementation

[0019] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0020] like Figure 1-3As shown, this utility model provides a technical solution: a seamless steel pipe for high-pressure boilers, including a seamless steel pipe 1, a pipe connection device 2 provided in the middle of the outer surface of the seamless steel pipe 1, a galvanized layer 3 provided on the inner wall of the seamless steel pipe 1, a ceramic coating 4 provided on the inner wall of the galvanized layer 3, heat dissipation holes 5 provided on the outer surface of the seamless steel pipe 1, and a polyurethane insulation layer 6 provided on the outer surface of the heat dissipation holes 5.

[0021] The pipe connection device 2 includes a semi-circular fixed pipe 201 sleeved on the outer surface of the seamless steel pipe 1. A semi-circular mating plate 202 is fixedly installed on the inner side of the semi-circular fixed pipe 201. A connecting bracket 203 is fixedly installed on the outer surface of the semi-circular fixed pipe 201. A fixing screw 204 is installed through the inside of the connecting bracket 203. A sealing rubber gasket 205 is fixedly installed on the inner wall of the semi-circular fixed pipe 201. A mating convex shaft 206 is fixedly installed on the left side of the semi-circular mating plate 202 on the right side. An arc-shaped mating groove 207 is opened on the left side of the semi-circular mating plate 202 on the left side.

[0022] Specifically, such as Figure 3 As shown, the connecting bracket 203 has a fixed threaded hole inside, which is adapted to the fixing screw 204. This threaded connection ensures that the fixing screw 204 can be firmly screwed into the connecting bracket 203 during installation, thereby tightly fixing the two semi-circular fixing tubes 201 together and enhancing the connection's strength. The mating cam 206 is inserted into the arc-shaped mating groove 207 and slides inside the arc-shaped mating groove 207. This design makes it easier to mate the two semi-circular mating discs 202 when installing the pipe connection device 2. At the same time, after mating, the cooperation between the mating cam 206 and the arc-shaped mating groove 207 can restrict the semi-circular... The relative movement of the connecting discs 202 further improves the stability of the connection. Rubber sealing rings are provided on the inner surface of the semi-circular connecting discs 202. The two sets of rubber sealing rings fit together. The setting of the rubber sealing rings can form a good sealing effect when the two semi-circular connecting discs 202 are connected, effectively preventing the medium from leaking from the connection part, and ensuring the sealing performance and safety of the seamless steel pipe during the operation of the high-pressure boiler. The size of the seamless steel pipe 1 is compatible with the size of the semi-circular fixed pipe 201. The appropriate size matching can ensure that the semi-circular fixed pipe 201 is tightly fitted on the seamless steel pipe 1, avoiding gaps, and ensuring the tightness and stability of the connection between the pipe connection device 2 and the seamless steel pipe 1.

[0023] The working principle of this utility model is as follows:

[0024] S1. When installing seamless steel pipes for high-pressure boilers, first align the parts of the two seamless steel pipes 1 that need to be connected, then put the two semi-circular fixed pipes 201 of the pipe connection device 2 onto the seamless steel pipe 1 from both sides, so that the mating cam 206 is aligned with the arc-shaped mating groove 207, and insert the mating cam 206 into the arc-shaped mating groove 207, push the two semi-circular fixed pipes 201 to rotate clockwise, so that the two semi-circular mating discs 202 fit tightly together, and at this time the two sets of rubber sealing rings fit together.

[0025] S2. Next, pass the fixing screw 204 through the fixing threaded hole of the connecting bracket 203, and tighten the fixing screw 204 with a tool. As the fixing screw 204 is tightened, the two semi-circular fixing tubes 201 gradually approach and are tightly fixed on the seamless steel pipe 1, and the sealing rubber gasket 205 is also squeezed.

[0026] S3. During the operation of the seamless steel pipe, when the internal medium temperature is high, the heat is transferred to the outer surface through the seamless steel pipe 1. The heat dissipation holes 5 dissipate the heat to the surrounding environment. At the same time, the polyurethane insulation layer 6 can reduce heat loss and maintain the temperature stability of the medium inside the pipe. The galvanized layer 3 and the ceramic coating 4 continuously protect the inner wall of the seamless steel pipe 1, preventing it from being corroded and worn, and ensuring that the seamless steel pipe can operate stably for a long time.

[0027] In summary, the seamless steel pipe for high-pressure boilers, through the mutual cooperation of the semi-circular fixed pipe 201 and the semi-circular mating plate 202 with the mating convex shaft 206 and the arc-shaped mating groove 207, makes the connection operation of the seamless steel pipe simpler. It is only necessary to insert the mating convex shaft 206 into the arc-shaped mating groove 207, and then tighten the two semi-circular fixed pipes 201 with the fixing screw 204, which greatly improves the installation efficiency. At the same time, the double sealing design of the rubber sealing ring and the sealing rubber gasket 205 effectively ensures the sealing of the connection part, reduces the risk of leakage, and improves the safety and stability of the seamless steel pipe.

[0028] The seamless steel pipe used in this high-pressure boiler can effectively prevent the inner wall of the seamless steel pipe 1 from rusting by setting a galvanized layer 3, thereby improving the corrosion resistance of the steel pipe. The ceramic coating 4 has good high temperature resistance and wear resistance. By setting heat dissipation holes 5, the heat generated by the seamless steel pipe during operation can be dissipated in time. The polyurethane insulation layer 6 can insulate the seamless steel pipe on the basis of heat dissipation, thereby reducing heat loss.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A seamless steel pipe for high-pressure boilers, comprising a seamless steel pipe (1), characterized by: The seamless steel pipe (1) has a pipe connection device (2) in the middle of its outer surface, a galvanized layer (3) on its inner wall, a ceramic coating (4) on its inner wall, a heat dissipation hole (5) on its outer surface, and a polyurethane insulation layer (6) on its outer surface.

2. A high-pressure boiler seamless steel pipe according to claim 1, characterized in that: The pipe connection device (2) includes a semi-circular fixed pipe (201) sleeved on the outer surface of the seamless steel pipe (1), a semi-circular docking plate (202) fixedly installed on the inner side of the semi-circular fixed pipe (201), a connecting bracket (203) fixedly installed on the outer surface of the semi-circular fixed pipe (201), a fixing screw (204) passing through the inside of the connecting bracket (203), a sealing rubber gasket (205) fixedly installed on the inner wall of the semi-circular fixed pipe (201), a docking convex shaft (206) fixedly installed on the left side of the semi-circular docking plate (202) on the right side, and an arc-shaped docking groove (207) opened on the left side of the semi-circular docking plate (202) on the left side.

3. A high-pressure boiler seamless steel pipe according to claim 2, characterized in that: The connecting bracket (203) has a fixed threaded hole inside, which is adapted to the fixed screw (204).

4. A high-pressure boiler seamless steel pipe according to claim 2, characterized in that: The mating convex shaft (206) is inserted into the interior of the arc-shaped mating groove (207) and slides inside the arc-shaped mating groove (207).

5. A high-pressure boiler seamless steel pipe according to claim 2, characterized in that: The inner surface of the semi-circular mating plate (202) is provided with rubber sealing rings, and the two sets of rubber sealing rings fit together.

6. A high-pressure boiler seamless steel pipe according to claim 2, characterized in that: The dimensions of the seamless steel pipe (1) are adapted to the dimensions of the semi-circular fixed pipe (201).

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