Combined type silencer for steam pipeline

Abstract

The combined type silencer for the steam pipeline belongs to the technical field of silencers and comprises an outer shell, an air inlet pipe is fixedly connected to the left portion of the outer shell, an exhaust pipe is fixedly connected to the right portion of the outer shell, the right end of a first silencing pipe is of an opening structure, and a second silencing pipe is connected to the first silencing pipe in a sealed and sliding mode. The right end of the second silencing pipe is of a closed structure, a plurality of evenly-distributed exhaust holes are formed in the left end of the second silencing pipe, the first silencing pipe is sleeved with a first spring, one end of the first spring is fixedly connected with the inner wall of the left portion of the outer shell, and the other end of the first spring is connected with the second silencing pipe. The inner wall of the outer shell is evenly and fixedly connected with a plurality of sets of silencing cotton mechanisms in the circumferential direction, and one end of each silencing cotton mechanism is fixedly connected with the outer wall of the second silencing pipe. And the flow speed reduction caused by the fact that the steam flow enters the silencer when the flow speed is normal is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of mufflers, in particular to a composite muffler for a steam pipeline. Background Art

[0002] The composite silencer for steam pipes is a silencer device used to eliminate the noise generated by steam when steam is transported in a steam pipe. The composite silencer is a composite sleeve silencer commonly used at present, that is, a second silencer pipe is provided in the outer shell of the silencer, and a first silencer pipe is provided in the second silencer pipe. When steam enters the first silencer pipe, the steam in the first silencer pipe enters the second silencer pipe. The right end of the second silencer pipe is a closed mechanism, so the steam in the second silencer pipe is turned back and comes out through the exhaust hole at the left end of the second silencer pipe into the outer shell of the silencer, contacts with the silencer cotton in the outer shell, further silences the sound, and then is discharged through the outer shell. The silencer cotton is generally attached to the inner wall of the outer shell (the silencer cotton is straight as a whole), but the steam discharge flow rate is unstable. Factors such as changes in boiler load will cause the steam discharge flow rate to be fast and slow. If the silencer cotton is The conventional setting of attaching to the inner wall of the outer shell, when the steam flow rate is accelerated, the noise of the steam also increases accordingly. This design will result in poor silencer effect of the silencer. Therefore, there is also an existing technology that changes the conventional design and adopts a V-shaped combined wave plate to install silencer cotton. After the steam enters the silencer, the steam can be blocked by the V-shaped silencer cotton, so that the steam flow rate in the outer shell is blocked and the flow rate is reduced. At the same time, the steam flow rushes back and forth to enhance the silencer effect. However, this design will cause a decrease in the steam flow rate for steam flow at normal speed, affecting the use of steam transport to the turbine. Therefore, the conventional internal attachment design of the existing technology cannot effectively silence the noise caused by the accelerated steam flow, and the V-shaped combination silencer cotton will cause the steam flow rate to slow down for steam flow at normal flow rate, which has the above defects that make it difficult to use. Summary of the Invention

[0003] In order to solve the technical problems mentioned in the above background technology, the present invention provides a composite muffler for a steam pipe, and the technical solution adopted is as follows:

[0004] The invention comprises an outer shell, an air intake pipe is fixedly connected to the left part of the outer shell, an exhaust pipe is fixedly connected to the right part of the outer shell, a first muffler is arranged in the outer shell, the first muffler is fixedly connected to the inner wall of the left part of the outer shell, the air intake pipe is communicated with the first muffler, the right end of the first muffler is an open structure, a second muffler is sealingly and slidingly connected to the first muffler, the right end of the second muffler is a closed structure, a number of evenly distributed exhaust holes are arranged on the left end of the second muffler, a first spring is sleeved on the outside of the first muffler, one end of the first spring is fixedly connected to the inner wall of the left part of the outer shell, and the other end is connected to the second muffler, a number of groups of muffler cotton mechanisms are evenly and fixedly connected to the inner wall of the outer shell along the circumferential direction, and one end of the muffler cotton mechanism is fixedly connected to the outer wall of the second muffler.

[0005] Furthermore, the silencer cotton mechanism includes a silencer cotton assembly and a ramp plate. One end of the silencer cotton assembly is fixedly connected to the inner wall of the outer shell, and the other end is rollingly connected to the ramp plate. The ramp plate is fixed on the outer wall of the second silencer pipe, and the slope of the ramp plate gradually decreases from left to right.

[0006] Furthermore, the silencer cotton mechanism is composed of several groups of silencer cotton components, and the silencer cotton components include a lifting rod, a sliding sleeve on the lifting rod is provided with a limit tube, the limit tube is fixed on the inner wall of the shell, and a group of roller plates are provided at the bottom of the lifting rod, and rollers are rotatably connected between the roller plates, and the rollers are arranged on the ramp plate for rolling. Silencers are hinged on both sides of the lifting rod.

[0007] Furthermore, the silencer includes a pair of hinged parts, with silencer cotton arranged between the hinged parts, the inner side of the silencer cotton wrapping the inner layer plate, a tube hole arranged inside the inner layer plate, both ends of the tube hole are closed structures, one end of the tube hole is fixedly connected to a fixing rod, the fixing rod is connected to one of the hinged parts, a stretching rod and a circular limiting plate are arranged in the tube hole, one end of the stretching rod is fixedly connected to the circular limiting plate, the other end of the stretching rod passes through the other end of the tube hole and extends to the outside of the tube hole, the other end of the stretching rod is connected to another hinged part, a second spring is arranged in the tube hole, the second spring is sleeved on the stretching rod, one end of the second spring is connected to the circular limiting plate, and the other end is connected to the inner wall of the end of the tube hole, a fixing plate is fixedly connected to the hinged part, and the fixing plate is fixedly connected to the inner wall of the outer shell.

[0008] Furthermore, the hinge part includes a group of hinge plates, which are fixedly connected to the fixed plate. A hinge shaft is rotatably connected between the hinge plates, and an axis plate is fixedly connected to the hinge shaft. One axis plate is connected to the fixed rod and the other axis plate is fixedly connected to the stretching rod.

[0009] Furthermore, the sound-absorbing cotton is made of a high-hardness polyester fiber material.

[0010] Furthermore, a group of hoops are provided on the sound-absorbing cotton.

[0011] The present invention has the following advantages: when the steam enters the silencer at a normal flow rate, the silencer cotton mechanism is horizontally arranged in the space, and the steam flow enters the outer shell and contacts the silencer cotton mechanism so that the noise in the steam flow is absorbed, thereby achieving silencer; when the steam flow velocity accelerates and the noise increases, the steam flow entering the second silencer pipe pushes the second silencer pipe to the right, the first spring stretches, and the second silencer pipe moves to the right, so that the second silencer pipe drives the silencer cotton mechanism to bend into a V shape, so that the steam flow repeatedly returns through the V-shaped silencer cotton mechanism, thereby increasing the counter-action of the airflow and canceling out the sound, reducing the flow velocity of the airflow, and achieving better silencer effect; and the amplitude of the V-shaped bending of the silencer cotton mechanism increases as the steam flow increases, and can make adaptive adjustments by itself, which not only avoids the poor sound effect of the silencer when the steam flow velocity increases, but also avoids the steam flow entering the silencer at a normal flow velocity and causing the flow velocity to decrease. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The internal structure of the present invention Figure 1 ;

[0013] Figure 2 This is an appearance diagram of the present invention;

[0014] Figure 3 The internal structure of the present invention Figure 2 ;

[0015] Figure 4 The internal structure of the present invention Figure 3 ;

[0016] Figure 5 This is a structural diagram of the sound-absorbing cotton mechanism of the present invention;

[0017] Figure 6 For the present invention Figure 5 Part of the internal structure diagram;

[0018] Figure 7 For the present invention Figure 6 Partial structural diagram;

[0019] Figure 8 For the present invention Figure 7 Internal structure diagram.

[0020] Figures: 1. Outer shell, 2. Air intake pipe, 3. Exhaust pipe, 4. First silencer, 5. Second silencer, 6. Exhaust hole, 7. First spring, 8. Ramp plate, 9. Lifting rod, 10. Roller plate, 11. Roller, 12. Silencing cotton, 13. Inner plate, 14. Pipe hole, 15. Fixed rod, 16. Stretching rod, 17. Circular limit plate, 18. Second spring, 19. Fixed plate, 20. Hinge plate, 21. Hinge shaft, 22. Shaft plate, 23. Hoop, 24. Limiting pipe. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Please refer to Figure 1-7 The present invention provides a composite silencer for a steam pipe, comprising an outer shell 1, an air intake pipe 2 being fixedly connected to the left side of the outer shell 1, steam entering the silencer through the air intake pipe 2, an exhaust pipe 3 being fixedly connected to the right side of the outer shell 1, and steam being discharged through the exhaust pipe 3 after being silenced by the silencer, a first silencer 4 being arranged in the outer shell 1, the first silencer 4 being fixedly connected to the inner wall of the left side of the outer shell 1, the air intake pipe 2 being communicated with the first silencer 4, steam entering the first silencer 4 through the air intake pipe 2, the right end of the first silencer 4 being an open structure, a second silencer 5 being sealingly and slidingly connected to the first silencer 4, the steam flow in the first silencer 4 entering the second silencer 5, the right end of the second silencer 5 being a closed structure, a plurality of evenly distributed exhaust holes 6 being arranged at the left end of the second silencer 5, and the exhaust holes 6 in the second silencer 5 The steam flow returns and offsets the steam flow entering the first silencer 4, performing preliminary noise elimination, and is discharged into the outer shell 1 through the exhaust hole 6. A first spring 7 is sleeved on the outside of the first silencer 4, one end of the first spring 7 is fixedly connected to the inner wall of the left part of the outer shell 1, and the other end is connected to the second silencer 5. The first spring 7 is set to ensure that when the steam flow accelerates the second silencer 5 to move to the right on the first silencer 4, when the steam flow decreases, the second silencer 5 can be pulled back to its position under the tension of the rebound of the first spring 7. Several groups of silencer cotton mechanisms are evenly and fixedly connected to the inner wall of the outer shell 1 along the circumferential direction, one end of the silencer cotton mechanism is fixedly connected to the outer wall of the second silencer 5. When the steam flow velocity entering the muffler is normal, the silencer cotton mechanism is structurally arranged horizontally in the three-dimensional space.

[0023] The silencer cotton mechanism includes a silencer cotton assembly and a ramp plate 8. One end of the silencer cotton assembly is fixedly connected to the inner wall of the outer shell 1, and the other end is rollingly connected to the ramp plate 8. The ramp plate 8 is fixed on the outer wall of the second silencer pipe 5. The slope of the ramp plate 8 gradually decreases from left to right. When the second silencer pipe 5 moves to the right, the second silencer pipe 5 drives the ramp plate 8 to move to the right as well. The ramp plate 8 contacts the silencer cotton assembly, driving the silencer cotton assembly to gradually rise.

[0024] The silencer cotton mechanism is composed of several groups of silencer cotton components, which include a lifting rod 9. A sliding sleeve is provided on the lifting rod 9 with a limiting tube 24. The limiting tube 24 is fixed to the inner wall of the outer shell 1. The limiting tube 24 limits the lifting rod 9 so that the lifting rod 9 can only be lifted and lowered within the limiting tube 24. A group of roller plates 10 are provided at the bottom of the lifting rod 9. Rollers 11 are rotatably connected between the roller plates 10. The rollers 11 are rollingly set on the ramp plate 8. When the flow rate of the steam flow entering the muffler is normal, the rollers 11 contact the lowest point of the ramp plate 8. When the ramp plate 8 moves to the right, the rollers 11 roll on the ramp plate 8. The rollers 11 roll while driving the lifting rod 9 to gradually rise. Silencers are hinged on both sides of the lifting rod 9.

[0025] The silencer includes a pair of hinged parts, and a silencer cotton 12 is arranged between the hinged parts. The inner side of the silencer cotton 12 is wrapped with an inner layer plate 13. A pipe hole 14 is arranged inside the inner layer plate 13. Both ends of the pipe hole 14 are closed structures. One end of the pipe hole 14 is fixedly connected to a fixing rod 15, and the fixing rod 15 is connected to one of the hinged parts. A stretching rod 16 and a circular limiting plate 17 are arranged in the pipe hole 14. One end of the stretching rod 16 is fixedly connected to the circular limiting plate 17, and the other end of the stretching rod 16 passes through the other end of the pipe hole 14 and extends to the outside of the pipe hole 14. The other end of the stretching rod 16 is connected to another hinged part, and is connected to the corresponding hinged part through the fixing rod 15 and the stretching rod 16 respectively. The silencer cotton 12 and the inner plate 13 on both sides of the lifting rod 9 can rotate as the lifting rod 9 is lifted and lowered. A second spring 18 is provided in the tube hole 14, and the second spring 18 is sleeved on the stretching rod 16. One end of the second spring 18 is connected to the circular limit plate 17, and the other end is connected to the inner wall of the end of the tube hole 14. When the silencer cotton 12 and the inner support plate 13 rotate as the lifting rod 9 is lifted and lowered, the stretching rod 16 drives the circular limit plate 17 to pull outward or retract, and the second spring 18 stretches or rebounds. A fixed plate 19 is fixedly connected to the hinged part, and the fixed plate 19 is fixedly connected to the inner wall of the outer shell 1. The entire silencer cotton assembly is suspended and fixed in the outer shell 1 through the fixed plate 19.

[0026] The hinge part includes a group of hinge plates 20, which are fixedly connected to the fixed plate 19. A hinge shaft 21 is rotatably connected between the hinge plates 20. The hinge shaft 21 is rotatable on the hinge plate 20. An axis plate 22 is fixedly connected to the hinge shaft 21. The axis plate 22 rotates with the rotation of the hinge shaft 21. One of the axis plates 22 is connected to the fixed rod 15 and the other axis plate 22 is fixedly connected to the stretching rod 16. The fixed rod 15 and the stretching rod 16 rotate with the rotation of the axis plate 22.

[0027] The sound-absorbing cotton 12 is made of a high-hardness polyester fiber material, which has the advantages of being hard and durable, not easy to deform, and corrosion-resistant.

[0028] A set of hoops 23 are provided on the sound-absorbing cotton 12 , and the sound-absorbing cotton 12 is fixed to the inner layer plate 13 through the hoops 23 .

[0029] The working principle of the present invention is as follows: when the steam is at a normal speed, the steam enters the first silencer pipe 4 through the air inlet pipe 2, and then enters the second silencer pipe 5 through the first silencer pipe 4. The steam in the second silencer pipe 5 is turned back and discharged into the outer shell 1 through the exhaust hole 6. In this process, the steam enters the outer shell 1 and offsets the steam entering the first silencer pipe 4, thereby performing preliminary silencing of the noise in the steam. The steam entering the outer shell 1 contacts the silencer cotton 12 arranged horizontally in the three-dimensional space, and the silencer cotton 12 silences the noise in the steam. The silenced steam is then discharged through the exhaust pipe 3.

[0030] When the steam flow rate becomes faster and the air pressure becomes larger and reaches a certain level or above, the steam entering the second steam pipe 5 pushes the second muffler 5 to the right, and the second muffler 5 slides to the right on the first muffler 4. The first spring 7 is stretched, and the second muffler 5 drives the ramp plate 8 to move to the right. The roller 11 rolls in contact with the ramp plate 8. As the contact between the roller 11 and the ramp plate 8 gradually increases from low to high, the roller 11 drives the lifting rod 9 to gradually rise in the limiting tube 24. The lifting rod 9 drives the stretching rod 16, the muffler cotton 12, the inner plate 13, and the fixed rod 15 on both sides to rotate. Since the rotation of the two sides is in the opposite direction, the lifting rod 9 is rotated. The silencer cotton 12 on both sides is V-shaped, and all the silencer cotton 12 in each row form a continuous V-shaped wave. During this period, the fixed rod 15 and the stretching rod 16 and the corresponding shaft plates 22 and the hinge shaft 21 on the shaft plate 22 rotate on the hinge plate 20. The stretching rod 16 drives the circular limit plate 17 to stretch outward, and the second spring 18 is stretched. When the steam flow in the outer shell 1 contacts the V-shaped silencer cotton 12, it first flows around each piece of silencer cotton 12, and then returns to collide with the previous steam flow, thereby enhancing the silencer effect on the noise in the steam flow. At the same time, the airflow is reversed, increasing the steam stroke in the outer shell 1 and reducing the steam flow rate.

[0031] The present invention is simple to operate, easy to use, and suitable for comprehensive promotion and application. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite muffler for a steam pipe, comprising an outer shell (1), an air intake pipe (2) fixedly connected to the left side of the outer shell (1), and an exhaust pipe (3) fixedly connected to the right side of the outer shell (1), characterized in that: A first muffler pipe (4) is provided in the outer shell (1), the first muffler pipe (4) is fixedly connected to the inner wall of the left part of the outer shell (1), the air intake pipe (2) is connected to the first muffler pipe (4), the right end of the first muffler pipe (4) is an open structure, a second muffler pipe (5) is sealed and slidably connected to the first muffler pipe (4), the right end of the second muffler pipe (5) is a closed structure, a plurality of evenly distributed exhaust holes (6) are provided at the left end of the second muffler pipe (5), a first spring (7) is sleeved on the outside of the first muffler pipe (4), one end of the first spring (7) is fixedly connected to the inner wall of the left part of the outer shell (1), and the other end is connected to the second muffler pipe (5), a plurality of groups of muffler cotton mechanisms are evenly fixedly connected to the inner wall of the outer shell (1) along the circumferential direction, and one end of the muffler cotton mechanism is fixedly connected to the outer wall of the second muffler pipe (5).

2. A composite muffler for a steam pipe according to claim 1, characterized in that: The muffler mechanism comprises a muffler assembly and a ramp plate (8), one end of the muffler assembly is fixedly connected to the inner wall of the outer shell (1), and the other end is rollingly connected to the ramp plate (8), the ramp plate (8) is fixed on the outer wall of the second muffler pipe (5), and the slope of the ramp plate (8) gradually decreases from left to right.

3. A composite muffler for a steam pipe according to claim 2, characterized in that: The muffler mechanism is composed of a plurality of muffler cotton components. The muffler cotton components include a lifting rod (9). A limiting tube (24) is provided on the sliding sleeve of the lifting rod (9). The limiting tube (24) is fixed on the inner wall of the outer shell (1). A group of roller plates (10) are provided at the bottom of the lifting rod (9). Rollers (11) are rotatably connected between the roller plates (10). The rollers (11) are rotatably arranged on the ramp plate (8). Mufflers are hinged on both sides of the lifting rod (9).

4. A composite muffler for a steam pipe according to claim 3, characterized in that: The muffler comprises a pair of hinged parts, a muffler cotton (12) is arranged between the hinged parts, the inner side of the muffler cotton (12) is wrapped with an inner plate (13), a tube hole (14) is arranged inside the inner plate (13), both ends of the tube hole (14) are closed structures, one end of the tube hole (14) is fixedly connected to a fixing rod (15), the fixing rod (15) is connected to one of the hinged parts, a stretching rod (16) and a circular limiting plate (17) are arranged in the tube hole (14), one end of the stretching rod (16) is fixedly connected to the circular limiting plate (17), The other end of the stretching rod (16) passes through the other end of the tube hole (14) and extends to the outside of the tube hole (14). The other end of the stretching rod (16) is connected to another hinged portion. A second spring (18) is provided in the tube hole (14). The second spring (18) is sleeved on the stretching rod (16). One end of the second spring (18) is connected to the circular limit plate (17), and the other end is connected to the inner wall of the end of the tube hole (14). A fixing plate (19) is fixedly connected to the hinged portion. The fixing plate (19) is fixedly connected to the inner wall of the outer shell (1).

5. A composite muffler for a steam pipe according to claim 4, characterized in that: The hinge portion includes a group of hinge plates (20), which are fixedly connected to the fixed plate (19). A hinge shaft (21) is rotatably connected between the hinge plates (20), and an axis plate (22) is fixedly connected to the hinge shaft (21). One axis plate (22) is connected to the fixed rod (15), and the other axis plate (22) is fixedly connected to the stretching rod (16).

6. A composite muffler for a steam pipe according to claim 4, characterized in that: The sound-absorbing cotton (12) is made of a polyester fiber material with high hardness.

7. A composite muffler for a steam pipe according to claim 4, characterized in that: A group of hoop rings (23) are provided on the sound-absorbing cotton (12).

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