Silencer for steam pipeline

Abstract

The utility model discloses a silencer for a steam pipeline, and particularly relates to the technical field of silencers, the silencer comprises a cylinder body, one end of the cylinder body penetrates through an air inlet pipe for introducing steam, a spiral fluid director is embedded in the air inlet pipe, a plurality of spiral fluid director channels are formed between the spiral fluid director and the air inlet pipe, and the spiral fluid director channels are communicated with the cylinder body. The end, extending into an inner cavity of the barrel, of the air inlet pipe communicates with a porous barrel, the center of the circular inner wall of the end, away from the air inlet pipe, of the porous barrel is fixedly connected with a fixing shaft, the fixing shaft is rotationally connected with a plurality of coaxial impellers, the other end of the barrel communicates with an exhaust pipe, and the diameter of the exhaust pipe is larger than that of the air inlet pipe. According to the silencer for the steam pipeline, the flow speed and the temperature of steam flowing at a high speed are both reduced, noise generated when the steam is exhausted from an exhaust pipe is reduced, and the health of operators and surrounding residents is protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of mufflers, and in particular relates to a muffler for a steam pipeline. Background Art

[0002] When the thermal power generating unit is installed or undergoes restorative maintenance, a large amount of steam will be discharged from the pipeline. When the steam is ejected from the pipeline at high speed, it impacts and shears the surrounding still air, causing violent gas disturbance near the nozzle and generating aerodynamic noise with a high sound level. This is extremely harsh, which not only has a certain impact on the daily life of the surrounding residents, but also the operators will suffer certain damage to their physical condition if they are in this working environment for a long time, and the high-speed flowing steam needs to be treated in a certain way.

[0003] Therefore need a kind of novel muffler for steam pipeline. Utility Model Content

[0004] In order to solve the above problems, the utility model discloses a muffler for a steam pipeline.

[0005] In order to achieve the above object, the technical solution of the utility model is as follows:

[0006] A silencer for a steam pipe comprises a cylinder, one end of which is penetrated by an air inlet pipe for letting in steam, a spiral deflector is embedded in the interior of the air inlet pipe, and a plurality of spiral deflector channels are formed between the spiral deflector and the air inlet pipe, one end of the air inlet pipe extending into the inner cavity of the cylinder is connected to a porous cylinder, a fixed shaft is fixedly connected to the center of the circular inner wall of one end of the porous cylinder away from the air inlet pipe, and a plurality of coaxial impellers are rotatably connected to the fixed shaft, the other end of the cylinder is connected to an exhaust pipe, and the diameter of the exhaust pipe is larger than that of the air inlet pipe, and a drain pipe is connected to the bottom of the cylinder.

[0007] As a preferred technical solution of the utility model, two spiral guide channels are formed between the spiral guide device and the air intake pipe.

[0008] As a preferred technical solution of the utility model, the diameter of the circular through holes on the annular wall of the porous cylinder gradually increases as it moves away from the air inlet pipe.

[0009] As a preferred technical solution of the utility model, the fixed shaft is provided with a plurality of annular grooves, and a bearing is sleeved in each annular groove, and the outer ring of each bearing is coaxially fixedly connected to the impeller.

[0010] As a preferred technical solution of the utility model, the diameters of the plurality of impellers gradually increase as they are away from the air inlet pipe.

[0011] As a preferred technical solution of the utility model, one end of the fixed shaft close to the air intake pipe is configured as a round head.

[0012] As a preferred technical solution of the utility model, a plurality of support columns are fixedly connected to the outer wall of the porous cylinder, and each support column is fixedly connected to the cylinder body.

[0013] As a preferred technical solution of the utility model, the cylinder includes: a support layer fixedly connected to the air inlet pipe, the exhaust pipe and the liquid discharge pipe, the outside of the support layer is wrapped with a sound-absorbing layer, and the support layer is lined with a flexible anti-collision layer.

[0014] The beneficial effects of the utility model are:

[0015] 1. During operation, after the high-speed steam enters the air inlet pipe, it flows in a spiral under the guidance of the spiral guide channel. After the spiral steam flows into the porous cylinder, it drives the impeller to rotate. The rotating impeller consumes the kinetic energy of the flowing steam and reduces the flow rate of the steam. Among them, since the diameters of several impellers gradually increase as they move away from the air inlet pipe, the steam ejected from the air inlet pipe will disperse and impact each impeller, so that each impeller rotates faster, which can fully consume the kinetic energy of the flowing steam. Thanks to the common consumption of multi-stage impellers, the flow rate of steam is reduced;

[0016] Second, as the steam expands and cools twice in the porous cylinder and in the interlayer between the cylinder and the porous cylinder, as well as the rotation and consumption of the impeller, the flow rate and temperature of the high-speed flowing steam are reduced, and the noise generated when discharged from the exhaust pipe is reduced, protecting the health of operators and surrounding residents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0018] Figure 2 It is an overall cross-sectional view of an embodiment of the utility model;

[0019] Figure 3 For the utility model embodiment Figure 2 The enlarged view of point A in the middle;

[0020] Figure 4 This is an exploded view of the fixed shaft, bearings and impeller according to an embodiment of the utility model.

[0021] List of Figure Symbols:

[0022] 1. Cylinder; 101. Support layer; 102. Flexible anti-collision layer; 103. Sound-absorbing layer;

[0023] 2. Inlet pipe; 3. Spiral deflector; 4. Porous cylinder; 5. Fixed shaft; 6. Bearing; 7. Impeller; 8. Exhaust pipe; 9. Drain pipe; 10. Support column. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. It should be understood that the following specific implementations are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0025] See also Figure 1-4 A muffler for a steam pipe comprises a cylinder 1, one end of which is penetrated by an air inlet pipe 2 for introducing steam. The air inlet pipe 2 is used to introduce discharged steam. A spiral guide 3 is inlaid inside the air inlet pipe 2, and a plurality of spiral guide channels are formed between the spiral guide 3 and the air inlet pipe 2. One end of the air inlet pipe 2 extending into the inner cavity of the cylinder 1 is connected to a porous cylinder 4. A fixed shaft 5 is fixedly connected to the center of the circular inner wall of the end of the porous cylinder 4 away from the air inlet pipe 2, and a plurality of coaxial impellers 7 are rotatably connected to the fixed shaft 5. After the steam enters the air inlet pipe 2, it flows in a spiral under the guidance of the spiral guide channel. After the spirally flowing steam flows into the porous cylinder 4, it is convenient to push the impeller 7 to rotate, and then the steam flows into the interlayer between the cylinder 1 and the porous cylinder 4 through the through hole of the porous cylinder 4. The rotating impeller 7 consumes the kinetic energy of the flowing steam, which is convenient for the deceleration of the flowing steam. The other end of the cylinder 1 is connected to an exhaust pipe 8, and the bottom of the cylinder 1 is connected to a drain pipe 9. The diameter of the exhaust pipe 8 is much larger than that of the intake pipe 2. As the steam expands and cools twice in the porous cylinder 4 and in the interlayer between the cylinder body 1 and the porous cylinder 4, the flow velocity of the steam decreases, and part of the steam condenses into liquid, wherein the gas flows out of the exhaust pipe 8 and the liquid flows out of the drain pipe 9.

[0026] In the drawings of the specification, the spiral deflector 3 is formed by twisting a single blade spirally, and two spiral deflector channels are formed between the spiral deflector 3 and the intake pipe 2. A spiral deflector 3 with multiple blades can also be provided to form multiple spiral deflector channels between the spiral deflector 3 and the intake pipe 2.

[0027] The diameter of the circular through hole on the annular wall of the porous cylinder 4 gradually increases as it moves away from the air inlet pipe 2. This facilitates the gradual discharge of the steam in the porous cylinder 4 to the interlayer between the cylinder body 1 and the porous cylinder 4. Initially, since the diameter of the circular through hole of the porous cylinder 4 is relatively small, most of the flowing steam drives the impeller 7 to rotate. When the steam flows to the other end of the porous cylinder 4, the remaining flowing steam is all discharged to the interlayer between the cylinder body 1 and the porous cylinder 4 through the circular through hole with a larger diameter.

[0028] One end of the fixed shaft 5 close to the air inlet pipe 2 is set as a round head. The round head is convenient for guiding the flowing steam to the impeller 7. The fixed shaft 5 is provided with a plurality of annular grooves, and a bearing 6 is sleeved in each annular groove, and the outer ring of each bearing 6 is coaxially fixedly connected to the impeller 7. The bearing 6 is used to improve the smoothness of the rotation of the impeller 7 and reduce the noise generated by the rotation. The diameters of the impellers 7 gradually increase as they move away from the air inlet pipe 2. Since the diameter of the impeller 7 is gradually increased, the steam ejected from the air inlet pipe 2 will disperse and impact each impeller 7, so that each impeller 7 rotates at a faster speed, avoiding that most of the ejected steam impacts a single impeller 7, causing damage to the blades of the impeller 7, while the remaining impellers 7 rotate at a lower speed and cannot consume the kinetic energy of the flowing steam.

[0029] The cylinder body 1 includes: a support layer 101 fixedly connected to the air inlet pipe 2, the exhaust pipe 8 and the liquid discharge pipe 9, the outside of the support layer 101 is wrapped with a sound-absorbing layer 103, and the support layer 101 is lined with a flexible anti-collision layer 102. The support layer 101 is made of metal material. The flexible anti-collision layer 102 is made of high-temperature resistant rubber, and the flexible anti-collision layer 102 is used to reduce the noise generated by the droplets sprayed from the porous cylinder 4 hitting the cylinder body 1. The sound-absorbing layer 103 is made of a porous material such as plastic foam, and the sound-absorbing layer 103 is used to absorb the noise generated by the internal operation of the cylinder body 1.

[0030] A plurality of support columns 10 are fixedly connected to the outer wall of the porous cylinder 4, and each support column 10 is fixedly connected to the cylinder body 1. The support columns 10 are directly fixedly connected to the support layer 101 made of metal.

[0031] Working principle:

[0032] During operation, the air inlet pipe 2 is connected to the pipe for discharging steam. After the high-speed steam enters the air inlet pipe 2, it flows in a spiral under the guidance of the spiral guide channel. After the spirally flowing steam flows into the porous cylinder 4, it drives the impeller 7 to rotate. The rotating impeller 7 consumes the kinetic energy of the flowing steam and reduces the flow rate of the steam. Then, the steam flows into the interlayer between the cylinder body 1 and the porous cylinder 4 through the through holes of the porous cylinder 4. As the steam expands and cools twice in the porous cylinder 4 and in the interlayer between the cylinder body 1 and the porous cylinder 4, the flow rate of the steam is reduced, and part of the steam is condensed into liquid, wherein the gas flows out from the exhaust pipe 8, and the liquid flows out from the drain pipe 9.

[0033] Since the diameters of the impellers 7 gradually increase as they move away from the air inlet pipe 2, the steam ejected from the air inlet pipe 2 will disperse and impact the impellers 7, so that the rotation speed of each impeller 7 is relatively fast, which can fully consume the kinetic energy of the flowing steam. Under the consumption of the impellers 7 and the two expansion and cooling, the flow rate and temperature of the high-speed flowing steam are reduced, and the noise generated when discharged from the exhaust pipe 8 is greatly reduced.

[0034] It should be noted that the above content only illustrates the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model. These improvements and modifications all fall within the protection scope of the claims of the utility model.

Claims

1. A muffler for a steam pipeline, comprising a cylinder (1), characterized in that: One end of the cylinder (1) is penetrated by an air inlet pipe (2) for letting in steam, the interior of the air inlet pipe (2) is inlaid with a spiral guide device (3), and a plurality of spiral guide channels are formed between the spiral guide device (3) and the air inlet pipe (2), the end of the air inlet pipe (2) extending into the inner cavity of the cylinder (1) is connected to a porous cylinder (4), the center of the circular inner wall of the end of the porous cylinder (4) away from the air inlet pipe (2) is fixedly connected to a fixed shaft (5), and the fixed shaft (5) is rotatably connected to a plurality of coaxial impellers (7), the other end of the cylinder (1) is connected to an exhaust pipe (8), and the diameter of the exhaust pipe (8) is larger than that of the air inlet pipe (2), and the bottom of the cylinder (1) is connected to a drain pipe (9).

2. A muffler for a steam pipe according to claim 1, characterized in that: Two spiral flow guide channels are formed between the spiral flow guide (3) and the air intake pipe (2).

3. A muffler for a steam pipe according to claim 1, characterized in that: The diameter of the circular through holes on the annular wall of the porous cylinder (4) gradually increases as it moves away from the air inlet pipe (2).

4. A muffler for a steam pipe according to claim 1, characterized in that: The fixed shaft (5) is provided with a plurality of annular grooves, and a bearing (6) is sleeved in each annular groove. The outer ring of each bearing (6) is coaxially fixedly connected to the impeller (7).

5. A muffler for a steam pipe according to claim 4, characterized in that: The diameters of the plurality of impellers (7) gradually increase as they move away from the air inlet pipe (2).

6. A muffler for a steam pipe according to claim 4, characterized in that: One end of the fixed shaft (5) close to the air inlet pipe (2) is arranged as a round head.

7. A muffler for a steam pipe according to claim 1, characterized in that: A plurality of support columns (10) are fixedly connected to the outer wall of the porous cylinder (4), and each support column (10) is fixedly connected to the cylinder body (1).

8. A muffler for a steam pipe according to claim 1, characterized in that: The cylinder (1) comprises: a support layer (101) fixedly connected to an air inlet pipe (2), an exhaust pipe (8) and a liquid discharge pipe (9); the outside of the support layer (101) is wrapped with a sound-absorbing layer (103); and the inside of the support layer (101) is lined with a flexible anti-collision layer (102).

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