Drainage device for directly-buried steam pipeline

Abstract

The utility model discloses a direct burial steam pipeline drainage device which comprises an outer protective pipe, a steam core pipe, a drainage pipe, a water collecting tank, an outer protective pipe tee joint and a drainage outer protective pipe, the steam core pipe is arranged in the outer protective pipe, a drainage point of the steam core pipe is connected with the water collecting tank, the drainage pipe is arranged in the drainage outer protective pipe, and the water collecting tank is connected with the drainage pipe. The water collecting tank is provided with a large-pipe-diameter outer protection pipe tee joint, the water collecting tank is located in an inner cavity of the outer protection pipe tee joint, the drain pipe is connected with a drain valve assembly after going out of the ground, and water is drained to a trench through the drain valve assembly. The drainage device can ensure safe and reliable operation of the directly-buried steam pipeline, reduces the operation and maintenance cost of the pipeline, and solves the problem that the drainage device of the directly-buried steam pipeline in the prior art cannot eliminate the phenomenon that the drainage pipeline is damaged due to shear stress generated by large thermal displacement of the steam core pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of steam pipelines, in particular to a direct-buried steam pipeline drainage device. Background Art

[0002] Condensate will be generated along the steam pipeline, and a drain device will be installed at a low point in the steam pipeline. The drain pipe of the direct-buried steam pipeline is arranged underground. Whether the drain device can operate well is related to the safety of the operation of the direct-buried steam pipeline. The drain device in the prior art is installed near the pipe fixing bracket, and the thermal displacement is relatively small. However, depending on the layout of the pipeline, it is sometimes necessary to install a drain device at a position with a larger displacement. The drain device produces thermal displacement with the core pipe. When the thermal displacement is relatively large and is blocked by external forces, the weld between the drain pipe and the core pipe or other weak links are easy to tear and damage, affecting the safe operation of the direct-buried steam pipeline, and even causing safety hazards, increasing the cost of pipeline operation and maintenance. Utility Model Content

[0003] The utility model is to overcome the shortcomings of the above-mentioned prior art and provide a direct buried steam pipeline drain device. The utility model can ensure the safe and reliable operation of the direct buried steam pipeline, reduce the pipeline operation and maintenance costs, and solve the problem that the direct buried steam pipeline drain device of the prior art cannot eliminate the shear stress caused by the large thermal displacement of the steam core tube that damages the drain pipeline.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A direct-buried steam pipeline drainage device comprises an outer protective pipe, a steam core pipe, a drainage pipe, a water collecting tank, an outer protective pipe tee, and a drainage outer protective pipe. The steam core pipe is arranged inside the outer protective pipe, the steam core pipe drainage point is connected to the water collecting tank, the drainage outer protective pipe is arranged inside the drainage pipe, the water collecting tank is connected to the drainage pipe, a large-diameter outer protective pipe tee is arranged at the water collecting tank, the outer protective pipe tee is sealed and connected to the outer protective pipe, the water collecting tank is located in the inner cavity of the outer protective pipe tee, the drainage pipe is connected to a drainage valve assembly after coming out of the ground, and the drainage is discharged to a ditch through the drainage valve assembly.

[0006] The hydrophobic outer protective pipe is provided with a rain cover after it is raised above the ground.

[0007] The outer protective pipe tee is sealed and connected to the outer protective pipe through the outer protective pipe diameter change.

[0008] The drain pipe is provided with a drain valve assembly, and the drain valve assembly includes a drain valve group 1 and a drain valve group 2. The drain valve group 1 and the drain valve group 2 are arranged in parallel on the drain pipe.

[0009] The first steam trap group adopts a gate valve as a steam trap during steam startup.

[0010] The second steam trap group adopts an automatic steam trap for draining water, and a gate valve for maintenance and shutting off the automatic steam trap is respectively provided before and after the automatic steam trap.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model adopts a water collecting tank connected with a steam core pipe, and adopts a large-diameter outer protective pipe tee at the drainage point. The large-diameter outer protective pipe tee meets the installation space of the water collecting tank and the space requirements of the water collecting tank with the thermal displacement of the steam core pipe. The utility model can ensure the safe and reliable operation of the direct-buried steam pipeline, reduce the cost of pipeline operation and maintenance, and solve the problem that the direct-buried steam pipeline drainage device in the prior art cannot eliminate the shear stress caused by the large thermal displacement of the steam core pipe that damages the drainage pipeline.

[0013] The large-diameter outer protective pipe tee structure can solve the problem that the conventional direct-buried steam pipe drain device cannot eliminate the shear stress that damages the drain pipe due to the large thermal displacement of the steam core pipe, thereby reducing the pipeline operation and maintenance costs and ensuring the safe operation of the direct-buried steam pipe.

[0014] 2. The lower side opening of the water collection barrel leads the drain pipe to the ground to drain water reliably.

[0015] 3. The hydrophobic outer protective pipe 7 is provided with a rain cover after it is above the ground. The rain cover is 500mm above the ground to prevent rainwater from flowing back into the hydrophobic outer protective pipe, protect the pipeline insulation material, and reduce heat loss.

[0016] 4. The outer protective pipe tee is sealed and connected to the outer protective pipe through the outer protective pipe reducer to ensure the tightness of the outer protective pipe seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0019] In the figure, the outer protective pipe 1, the steam core pipe 2, the drain pipe 3, the water collecting tank 4, the outer protective pipe tee 5, the outer protective pipe reducer 6, the drain outer protective pipe 7, the rain cover 8, and the ground 9. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] like Figure 1As shown, a direct-buried steam pipe drain device comprises an outer protective pipe 1, a steam core pipe 2, a drain pipe 3, a water collecting tank 4, an outer protective pipe tee 5, and a drain outer protective pipe 7. The outer protective pipe 1 is provided with a steam core pipe 2, the steam core pipe 2 is connected to the water collecting tank 4 at a drain point, the drain outer protective pipe 7 is provided with a drain pipe 3, the water collecting tank 4 is connected to the drain pipe 3, a large-diameter outer protective pipe tee 5 is provided at the water collecting tank 4, the outer protective pipe tee 5 is sealed and connected to the outer protective pipe 1 to ensure the tightness of the outer protective pipe, the water collecting tank 4 is located in the inner cavity of the outer protective pipe tee 5, and the drain pipe 3 is connected to the drain valve assembly after it comes out of the ground 9, and the water is drained to the ditch through the drain valve assembly.

[0022] The hydrophobic outer protective pipe 7 is provided with a rain cover 8 after it is above the ground 9. The rain cover 8 is 500mm above the ground to prevent rainwater from flowing back into the hydrophobic outer protective pipe, protect the pipeline insulation material, and reduce heat loss.

[0023] The outer protective pipe tee 5 is sealed and connected to the outer protective pipe 1 through the outer protective pipe reducer 6 to ensure the tightness of the outer protective pipe.

[0024] The drain pipe 3 is provided with a drain valve assembly, and the drain valve assembly includes a drain valve group 1 d and a drain valve group 2 d1. The drain valve group 1 d and the drain valve group 2 d1 are arranged in parallel on the drain pipe 3.

[0025] The steam trap group 1 uses a gate valve as a steam trap when starting. When the steam trap group 1 uses a gate valve as a steam trap when starting, the steam trap group 2 is closed. After the steam runs continuously, the steam trap group d is closed and the steam trap group d1 is opened.

[0026] The steam trap group 1 uses a gate valve as a steam trap when starting. The steam trap group 1 uses a gate valve as a steam trap when starting. At this time, the steam trap group 2 is closed. After the steam runs continuously, the steam trap group d is closed and the steam trap group d1 is opened.

[0027] The second d1 of the steam trap group adopts an automatic steam trap to drain water. A gate valve is respectively provided before and after the automatic steam trap to be used for maintenance and shutting off the automatic steam trap.

[0028] The utility model adopts a water collecting tank 4 connected with a steam core pipe 2, and adopts a large-diameter outer protective pipe tee 5 at the drainage point, which satisfies the installation space of the water collecting tank 4 and the space requirement of the water collecting tank 4 with the thermal displacement of the steam core pipe. The side opening at the lower part of the water collecting barrel leads the drainage pipe 3 to the ground for drainage.

[0029] The large-diameter outer protective pipe tee structure can solve the problem that the conventional direct-buried steam pipe drain device cannot eliminate the shear stress that damages the drain pipe due to the large thermal displacement of the steam core pipe, thereby reducing the pipeline operation and maintenance costs and ensuring the safe operation of the direct-buried steam pipe.

[0030] In the description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the purpose of describing the present invention rather than requiring the present invention to be constructed or operated in a specific position, and therefore cannot be understood as a limitation on the present invention. The terms "connected" and "connected" in the present invention should be understood in a broad sense, for example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] The above is a preferred embodiment of the present invention, and the description of the specific embodiment is only used to better understand the concept of the present invention. For ordinary technicians in this technical field, several improvements or equivalent substitutions can be made according to the principle of the present invention, and these improvements or equivalent substitutions are also considered to fall within the protection scope of the present invention.

Claims

1. A direct buried steam pipe drainage device, comprising an outer protective pipe, a steam core pipe, and a drainage pipe, characterized in that: It also includes a water collecting tank, an outer protective pipe tee, and a drain outer protective pipe. A steam core pipe is arranged inside the outer protective pipe. The steam core pipe drain point is connected to the water collecting tank. A drain pipe is arranged inside the drain outer protective pipe. The water collecting tank is connected to the drain pipe. A large-diameter outer protective pipe tee is arranged at the water collecting tank. The outer protective pipe tee is sealed and connected to the outer protective pipe. The water collecting tank is located in the inner cavity of the outer protective pipe tee. The drain pipe is connected to a drain valve assembly after it comes out of the ground. The drain is discharged to the ditch through the drain valve assembly.

2. A direct buried steam pipe drain device as claimed in claim 1, characterized in that: The hydrophobic outer protective pipe is provided with a rain cover after it is raised above the ground.

3. A direct buried steam pipe drain device as claimed in claim 1, characterized in that: The outer protective pipe tee is sealed and connected to the outer protective pipe through the outer protective pipe diameter change.

4. A direct buried steam pipe drain device as claimed in claim 1, characterized in that: The drain pipe is provided with a drain valve assembly, and the drain valve assembly includes a drain valve group 1 and a drain valve group 2. The drain valve group 1 and the drain valve group 2 are arranged in parallel on the drain pipe.

5. A direct buried steam pipe drain device as claimed in claim 4, characterized in that: The first steam trap group adopts a gate valve as a steam trap during steam startup.

6. A direct buried steam pipe drain device as claimed in claim 4, characterized in that: The second steam trap group adopts an automatic steam trap for draining water, and a gate valve for maintenance and shutting off the automatic steam trap is respectively provided before and after the automatic steam trap.

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