Silencer for nitrogen production

Abstract

The utility model discloses a silencer for nitrogen production, which comprises a silencer shell, a partition plate is vertically arranged in the silencer shell, and an inner cavity of the silencer shell is equally divided into a left cavity body and a right cavity body by the partition plate; the exhaust pipe is inserted from the bottom of the left cavity of the silencer shell, the upper end of the exhaust pipe extends to the upper end of the left cavity of the silencer shell, and a damping disc is arranged at the top of the left cavity; the distance between the partition plate and the bottom of the silencer shell is a certain distance, so that the left cavity and the right cavity of the silencer shell are communicated. According to the exhaust pipe, the silencing effect can be enhanced, and the pipe orifice of the exhaust pipe is not directly blocked by the silencing material, so that the exhaust resistance is small.

Description

TECHNICAL FIELD

[0001] The utility model relates to a nitrogen production muffler belongs to the technical field of muffler. BACKGROUND

[0002] The nitrogen making machine uses clean compressed air as raw material, uses the principle of pressure swing adsorption, uses carbon molecular sieve as adsorbent, and selectively adsorbs gas molecules by using carbon molecular sieve full of micropores to obtain nitrogen. After the carbon molecular sieve adsorption of the adsorption tower of the nitrogen making machine reaches saturation, the oxygen molecules in the pores of the molecular sieve need to be discharged. After the nitrogen making work is finished, the adsorption tower discharges the remaining waste gas outside the tower, and the pressure of the carbon molecular sieve layer is reduced from 0.3-0.6 MPa to normal pressure through pressure equalization. The oxygen partial pressure in the pores of the carbon molecular sieve is greater than the external oxygen partial pressure, and the oxygen flows from the pores to the outside, thereby releasing the adsorbed oxygen molecules from the pores of the molecular sieve. However, the noise generated during the exhaust of the previous adsorption tower is large, which seriously affects the workshop environment.

[0003] The existing muffler based on the nitrogen making machine has the following problems during use:

[0004] First, the muffler is installed on the exhaust pipe, the gas pressure in the adsorption tank is high, the resistance of the muffler is large, and the muffler is easily blown off during exhaust;

[0005] Second, some sponges are installed in the muffler, and the sound reduction effect is poor.

[0006] In summary, the prior art has obvious inconvenience and defects in actual use, and needs to be improved. CONTENT OF THE UTILITY MODEL

[0007] The utility model provides a nitrogen production muffler in response to the deficiencies in the background art, which can enhance the sound reduction effect, and the pipe opening of the exhaust pipe is not directly plugged with sound reduction material, so the exhaust resistance is small.

[0008] To solve the above technical problems, the utility model adopts the following technical scheme:

[0009] A nitrogen production muffler comprises a muffler shell, a partition plate is vertically arranged in the muffler shell, and the partition plate divides the inner cavity of the muffler shell into left and right cavities;

[0010] An exhaust pipe is inserted into the bottom of the left cavity of the muffler shell, and the upper end of the exhaust pipe extends to the upper end of the left cavity of the muffler shell;

[0011] The partition plate is a distance away from the bottom of the muffler shell, so that the left cavity and the right cavity of the muffler shell are connected.

[0012] Further, the top of the muffler shell is provided with an opening, the opening is provided with a top cover, the top cover is fixed on the muffler shell through first bolts, and the damping disc is fixed on the lower surface of the top cover.

[0013] Further, the damping disc has a plurality of air holes arranged on the disc surface, the plurality of damping discs are installed on the mounting shaft in a top-down manner, and the compression springs are arranged between the damping discs.

[0014] Further, the gas outlet of the exhaust pipe extends upward to the lower side of the damping disc.

[0015] Further, the inside of the muffler shell is a cavity structure, glass wool is arranged in the cavity, and the inner wall of the muffler shell is attached with sound-absorbing cotton.

[0016] Further, the bottom of the left cavity of the muffler shell is provided with a sealing ring, and the exhaust pipe extends into the inside of the muffler shell after penetrating through the sealing ring.

[0017] Further, the sound-absorbing cylinder is vertically installed in the right cavity of the muffler shell, the airflow passage is coaxially arranged in the middle of the sound-absorbing cylinder, and a plurality of sound-absorbing holes are arranged on the side wall of the sound-absorbing cylinder.

[0018] Further, the sound-absorbing hole is formed by two through holes, the axis of the first through hole is perpendicular to the axis of the sound-absorbing cylinder, and the axis of the second through hole is arranged at an angle with the axis of the sound-absorbing cylinder.

[0019] Further, the top end of the sound-absorbing cylinder is fixed on the lower surface of the top cover through second bolts, the top cover is provided with a gas outlet, and the gas outlet is communicated with the upper opening of the airflow passage of the sound-absorbing cylinder.

[0020] The above technical scheme is adopted, and compared with the prior art, the following advantages are obtained:

[0021] 1. The airflow impacts the damping disc, the damping disc consumes the kinetic energy of the airflow by vibration, and plays a sound-absorbing role; the airflow flows downward from the upper end of the left cavity of the muffler shell, bypasses the baffle, enters the lower end of the sound-absorbing cylinder, and is further sound-absorbed after passing through the sound-absorbing cylinder, and then the airflow is discharged from the upper end, the airflow passing through the channel is lengthened, and the sound-absorbing effect is increased, and at the same time, the pipe opening of the exhaust pipe is not directly blocked by sound-absorbing material, and the resistance is small.

[0022] 2. In the sound-absorbing cylinder, the airflow can flow out from the second through hole, turn back and flow into the airflow passage in the middle of the sound-absorbing cylinder from the first through hole, the airflow turned back from the first through hole and the airflow in the middle airflow passage offset each other, and play a sound-absorbing role.

[0023] The utility model will be described in detail in combination with the drawings and examples. DRAWINGS

[0024] Figure 1 is a structural schematic view of the utility model;

[0025] Figure 2 is a half sectional view of the utility model;

[0026] Figure 3 is a structural schematic view of the muffler cylinder;

[0027] Figure 4 is a half sectional view of the muffler cylinder;

[0028] Figure 5 is Figure 4 the enlarged view of A in the middle.

[0029] in the drawing,

[0030] 1 - exhaust pipe, 2 - support leg, 3 - muffler shell, 4 - glass wool, 5 - sound-absorbing cotton, 6 - sealing ring, 7 - top cover, 8 - first bolt, 9 - damping disc, 10 - mounting shaft, 11 - compression spring, 12 - partition, 13 - second bolt, 14 - exhaust port, 15 - muffler cylinder, 16 - sound-absorbing hole, 1601 - first through hole, 1602 - second through hole. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation mode of the utility model will be explained by referring to the drawings.

[0032] As Figures 1-2 shown, the utility model provides a muffler for nitrogen production, including muffler shell 3, muffler shell 3 outside is equipped with support leg 2, the vertical partition 12 of being equipped with in muffler shell 3, the inner chamber of muffler shell 3 is divided into left and right two cavities by partition 12;

[0033] exhaust pipe 1 is inserted from the bottom of left cavity of muffler shell 3, and the upper end of exhaust pipe 1 extends to the upper end of left cavity of muffler shell 3, and the top of left cavity is provided with damping disc 9.

[0034] The partition 12 is a distance from the bottom of muffler shell 3, so that the left cavity and the right cavity of muffler shell 3 are communicated.

[0035] The top of muffler shell 3 is provided with an opening, the opening is provided with top cover 7, top cover 7 is fixed on muffler shell 3 by first bolt 8, and damping disc 9 is fixed on the lower surface of top cover 7.

[0036] The damping disc 9 has a plurality of air holes arranged on the disc surface, and the plurality of damping discs 9 are arranged on the mounting shaft 10 in a top-down manner, and the damping discs 9 are provided with compression springs 11.

[0037] The air outlet of the exhaust pipe 1 extends upwards to the lower side of the damping disc 9.

[0038] The inside of the muffler shell 3 is a cavity structure, and the cavity is filled with glass wool 4, and the inner wall of the muffler shell 3 is attached with sound-absorbing cotton 5.

[0039] The bottom of the left cavity of the muffler shell 3 is provided with a sealing ring 6, and the exhaust pipe 1 extends into the inside of the muffler shell 3 after passing through the sealing ring 6.

[0040] The sound-absorbing cylinder 15 is vertically arranged in the right cavity of the muffler shell 3, the middle of the sound-absorbing cylinder 15 is coaxially provided with an airflow passage, and a plurality of sound-absorbing holes 16 are arranged on the side wall of the sound-absorbing cylinder 15.

[0041] The sound-absorbing hole 16 is composed of two through holes, wherein the axis of the first through hole 1601 is perpendicular to the axis of the sound-absorbing cylinder 15, and the axis of the second through hole 1602 is arranged at an angle with the axis of the sound-absorbing cylinder 15, as shown in the figure. Figures 3-5 When the airflow flows from the bottom to the top of the airflow passage in the middle of the sound-absorbing cylinder 15, the airflow can flow out of the second through hole 1602, turn back and flow into the airflow passage in the middle of the sound-absorbing cylinder 15 from the first through hole 1601, and the airflow turned back from the first through hole 1601 and the airflow in the middle airflow passage are mutually offset, thereby achieving the sound-absorbing effect.

[0042] The top end of the sound-absorbing cylinder 15 is fixed to the lower surface of the top cover 7 through the second bolt 13, and the top cover is provided with an air outlet 14, and the air outlet 14 is communicated with the upper opening of the airflow passage of the sound-absorbing cylinder 15.

[0043] The specific working principle of the utility model is as follows:

[0044] The exhaust pipe 1 is inserted from the bottom of the left cavity of the muffler shell 3, and the upper end of the exhaust pipe 1 extends to the upper end of the left cavity of the muffler shell 3, the top of the left cavity is provided with a plurality of damping discs 9, the airflow impacts the damping disc 9, the damping disc 9 vibrates to consume the kinetic energy of the airflow, thereby achieving the sound-absorbing effect; the airflow flows downwards from the upper end of the left cavity of the muffler shell 3, bypasses the baffle 12, enters the lower end of the sound-absorbing cylinder 15, and after further sound-absorbing by the sound-absorbing cylinder 15, the airflow is discharged from the upper end, the airflow flow channel is lengthened, and the sound-absorbing effect is increased, and at the same time, the pipe opening of the exhaust pipe 1 is not directly blocked by sound-absorbing material, and the resistance is small.

[0045] The above is an example of the best embodiment of the present application, wherein the parts not described in detail are common knowledge of those skilled in the art. The protection scope of the present application is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present application is also within the protection scope of the present application.

Claims

1. A muffler for nitrogen gas production, characterized by: The muffler shell (3) is vertically provided with a partition plate (12) which divides the inner cavity of the muffler shell (3) into left and right cavities. The exhaust pipe (1) is inserted from the bottom of the left cavity of the muffler shell (3), and the upper end of the exhaust pipe (1) extends to the upper end of the left cavity of the muffler shell (3), and the top of the left cavity is provided with a damping disc (9). The partition plate (12) is a distance away from the bottom of the muffler shell (3), so that the left and right cavities of the muffler shell (3) are connected.

2. The silencer for producing nitrogen as claimed in claim 1, wherein: The top of the muffler shell (3) is provided with an opening, and the opening is provided with a top cover (7), and the top cover (7) is fixed on the muffler shell (3) by a first bolt (8), and the damping disc (9) is fixed on the lower surface of the top cover (7).

3. The silencer for producing nitrogen as claimed in claim 1, wherein: The damping disc (9) has a plurality of air holes arranged on the disc surface, and the plurality of damping discs (9) are installed on the mounting shaft (10) in an up-down manner, and the damping discs (9) are provided with compression springs (11), and the upper end of the mounting shaft (10) is fixed on the top cover (7).

4. The silencer for producing nitrogen as claimed in claim 3, wherein: The exhaust port of the exhaust pipe (1) extends upward to the lower side of the damping disc (9).

5. The silencer for producing nitrogen as defined in claim 1, wherein: The inside of the muffler shell (3) is a hollow structure, and the hollow is filled with glass wool (4), and the inner wall of the muffler shell (3) is attached with sound-absorbing cotton (5).

6. The silencer for producing nitrogen as defined in claim 1, wherein: The bottom of the left cavity of the muffler shell (3) is provided with a sealing ring (6), and the exhaust pipe (1) extends into the inside of the muffler shell (3) after passing through the sealing ring (6).

7. The silencer for producing nitrogen as defined in claim 1, wherein: The right cavity of the muffler shell (3) is vertically provided with a sound-absorbing cylinder (15), and the middle of the sound-absorbing cylinder (15) is coaxially provided with an airflow passage, and the side wall of the sound-absorbing cylinder (15) is provided with a plurality of sound-absorbing holes (16).

8. The sound arrester for producing nitrogen as claimed in claim 7, wherein: The sound-absorbing hole (16) is composed of two through holes, and the axis of the first through hole (1601) is perpendicular to the axis of the sound-absorbing cylinder (15), and the axis of the second through hole (1602) is arranged at an angle with the axis of the sound-absorbing cylinder (15).

9. The sound arrester for producing nitrogen as claimed in claim 8, wherein: The top end of the sound-absorbing cylinder (15) is fixed on the lower surface of the top cover (7) by a second bolt (13), and the top cover is provided with an exhaust port (14), and the exhaust port (14) is communicated with the upper opening of the airflow passage of the sound-absorbing cylinder (15).

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