Noise reduction muffler, vacuum suction pump, and vacuum suction pump muffler installation method

Abstract

The present invention relates to a noise reduction muffler, the structure of which includes an outer cylinder, an inner cylinder, a fixed rod and a silicone sheet; the outer cylinder is a cylinder that passes through from top to bottom, the two ends of the inner cylinder are sealed, a plurality of diversion holes are opened on the cylinder wall of the inner cylinder, and the inner cylinder is sleeved in the outer cylinder, the fixed rod is connected in the inner cylinder, the axis of the fixed rod coincides with the axis of the inner cylinder, and a plurality of silicone sheets are vertically connected to the fixed rod. The diversion holes are circular and evenly distributed on the cylinder wall of the inner cylinder. The fixed rod passes through the inner cylinder, and lock nuts are respectively threadedly connected at both ends of the fixed rod. The present invention also discloses a vacuum suction pump and a method for reducing the noise of the vacuum suction pump, and a noise reduction muffler is installed on the exhaust pipe of the vacuum pump. The present invention has a simple structure and can reduce the noise rate by 85% without affecting the normal exhaust volume and suction pressure of the vacuum suction pump, and reduce the working noise of the vacuum pump to below the safe noise level of 30 decibels.

Description

Technical Field

[0001] The invention relates to a muffler, in particular to a noise reduction muffler, a vacuum suction pump and a method for installing the muffler of the vacuum suction pump. Background Art

[0002] At present, the vacuum suction device used in the production equipment of high-density polyethylene winding structure wall pipe has a large vacuum suction pump with high speed. During the operation of the suction process, the exhaust pipe will produce high-pressure exhaust, and the high-speed airflow ejected from the exhaust port will produce high-decibel noise by friction with the surrounding air. When the production line is in normal production, each vacuum suction pump starts and runs once every 8 minutes to 10 minutes on average, and each operation lasts for 30 seconds to 60 seconds. Therefore, when multiple production lines are produced at the same time, the production workshop will generate exhaust noise every 3 minutes to 4 minutes, and the noise generated can reach 70 to 110 decibels. The relevant requirements of my country's noise standards point out that a noise level of 30 to 40 decibels is a relatively quiet normal environment, and exceeding 50 decibels will affect sleep and rest. Due to insufficient rest, people cannot eliminate fatigue, and their normal physiological functions will be affected to a certain extent; noise above 70 decibels interferes with conversation, causing upset, lack of concentration, affecting work efficiency, and even accidents; long-term work or living in a noise environment above 90 decibels will seriously affect hearing and cause other diseases. Summary of the invention

[0003] The purpose of the present invention is to provide a noise reduction muffler, a vacuum suction pump and a vacuum suction pump muffler installation method to solve the problem of high noise of the existing vacuum suction pump.

[0004] The present invention is implemented as follows: a noise reduction muffler includes an outer cylinder, an inner cylinder, a fixing rod and a silicone sheet; the outer cylinder is a cylinder that passes through from top to bottom, the two ends of the inner cylinder are sealed, a plurality of diversion holes are opened on the cylinder wall of the inner cylinder, and the inner cylinder is sleeved in the outer cylinder, the fixing rod is connected to the inner cylinder, the axis of the fixing rod coincides with the axis of the inner cylinder, and a plurality of silicone sheets are vertically connected to the fixing rod.

[0005] The diverter holes are circular and evenly distributed on the wall of the inner cylinder; the diameter of the diverter holes is φ8mm, and the total area of ​​the openings on the inner cylinder is 4 to 5 times the flow area of ​​the outer cylinder.

[0006] The size of the silicone sheet increases from bottom to top along the arrangement direction, and the maximum diameter of the silicone sheet should be 4 mm smaller than the inner diameter of the inner cylinder.

[0007] The distance between two adjacent silica gel sheets is 10 mm.

[0008] The thickness of the silicone sheet is 3 mm.

[0009] The fixing rod passes through the inner cylinder, and lock nuts are respectively threadedly connected at both ends of the fixing rod.

[0010] The present invention also discloses a vacuum suction pump, comprising a vacuum pump, an exhaust pipe and a noise reduction muffler, wherein the noise reduction muffler comprises an outer cylinder, an inner cylinder, a fixed rod and a silicone sheet; the outer cylinder is a cylinder that passes through from top to bottom, the two ends of the inner cylinder are sealed, a plurality of diversion holes are opened on the cylinder wall of the inner cylinder, and the inner cylinder is sleeved in the outer cylinder, the fixed rod is connected to the inner cylinder, the axis of the fixed rod coincides with the axis of the inner cylinder, and a plurality of silicone sheets are vertically connected to the fixed rod.

[0011] It also includes an extended cylinder, which is installed at the end of the exhaust pipe. The extended cylinder and the exhaust pipe together form an outer cylinder of the noise reduction muffler.

[0012] The inner cylinder is divided into two parts, an upper part and an lower part, and the mating surfaces of the upper part and the lower part of the inner cylinder are flush with the mating surfaces of the exhaust pipe and the extension cylinder.

[0013] The present invention also provides a method for reducing the noise of a vacuum suction pump, comprising the following steps:

[0014] a. Provide a fixing rod and evenly arrange a number of silicone sheets along the fixing rod;

[0015] b. Set the upper and lower parts of the inner cylinder and connect them to the two ends of the fixed rod respectively. Align the upper and lower parts of the inner cylinder with each other and place the silicone sheet inside the inner cylinder. Screw the lock nuts at both ends of the fixed rod to fix the inner cylinder and the fixed rod together.

[0016] c. Place the lower half of the inner cylinder into the exhaust pipe port of the vacuum suction pump, and align the mating surfaces of the upper and lower halves of the inner cylinder with the top surface of the exhaust pipe;

[0017] d. Install the extension cylinder on the upper end of the exhaust pipe and use bolts to fasten the flange of the exhaust pipe and the flange of the extension cylinder.

[0018] The noise reduction silencer of the present invention divides the cavity into two parts, an inner part and an outer part, by arranging an inner cylinder in an outer cylinder. After the airflow enters the cavity, it is disturbed and diverted after passing through the diversion holes of the inner cavity. After the airflow enters the inner cylinder, the silicone sheet has a certain blocking effect on the airflow and absorbs the high-frequency rotation noise. The airflow reduces the frequency and intensity of the noise under the disturbance and adsorption of the multi-layer silicone sheet.

[0019] The vacuum suction pump of the present invention is provided with a noise reduction muffler at the end of the exhaust pipe, and the exhaust pipe wall is used as a part of the outer cylinder of the noise reduction muffler. The outer cylinder is formed by adding an extended cylinder, which facilitates the noise reduction modification of the vacuum pump.

[0020] The invention has a simple structure and can reduce the noise rate by 85% without affecting the normal exhaust volume and suction pressure of the vacuum suction pump, thereby reducing the working noise of the vacuum pump to below the safe noise level of 30 decibels. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the noise reduction muffler of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the vacuum suction pump of the present invention.

[0023] In the figure: 1. outer cylinder; 2. inner cylinder; 3. fixing rod; 4. silicone sheet; 5. lock nut; 6. diversion hole; 7. vacuum pump; 8. exhaust pipe; 9. extension cylinder. DETAILED DESCRIPTION

[0024] like Figure 1 As shown, the noise reduction muffler of the present invention comprises an outer cylinder 1, an inner cylinder 2, a fixing rod 3 and a silicone sheet 4.

[0025] like Figure 2 As shown, the vacuum suction pump of the present invention includes a vacuum pump 7, an exhaust pipe 8 and a noise reduction muffler. The noise reduction muffler includes an outer cylinder 1, an inner cylinder 2, a fixing rod 3 and a silicone sheet 4. It also includes an extension cylinder 9, which is installed at the end of the exhaust pipe 8. The extension cylinder 9 and the exhaust pipe 8 together constitute the outer cylinder 1 of the noise reduction muffler. During installation, the lower half of the inner cylinder 2 is directly placed into the port of the exhaust pipe 8, and the wall of the exhaust pipe 8 is used as the lower half of the outer cylinder 1. Then, the extension cylinder 9 is sleeved on the protruding part of the inner cylinder 2, and the extension cylinder 9 is used as the upper half of the outer cylinder 1. The inner cylinder 2 is divided into two parts, the upper and lower parts of the inner cylinder 2, and the mating surfaces of the upper and lower parts are flush with the mating surfaces of the exhaust pipe 8 and the extension cylinder 9. The flange of the inner cylinder 2 is flush with the flanges of the exhaust pipe 8 and the extension cylinder 9, and is fastened by bolts.

[0026] The present invention also provides a method for reducing the noise of a vacuum suction pump, that is, using the above-mentioned noise reduction muffler to reduce the noise of the vacuum suction pump, comprising the following steps:

[0027] a. Evenly thread several silicone sheets 4 onto the fixing rod 3.

[0028] b. Connect the upper and lower parts of the inner cylinder 2 to the two ends of the fixing rod 3, align the upper and lower parts of the inner cylinder 2, and screw the lock nuts 5 on the two ends of the fixing rod 3 to fix the inner cylinder 2 and the fixing rod 3 as a whole.

[0029] c. Place the lower half of the matched inner cylinder 2 into the port of the exhaust pipe 8 of the vacuum suction pump, and align the matching surfaces of the upper and lower halves of the inner cylinder 2 with the top surface of the exhaust pipe 8.

[0030] d. Install the extension cylinder 9 on the upper end of the exhaust pipe 8, and use bolts to fasten the flange of the exhaust pipe 8 and the flange of the extension cylinder 9.

[0031] like Figure 1 As shown, for the above-mentioned noise reduction muffler, its inner cylinder 2 is sleeved inside the outer cylinder 1, the outer cylinder 1 is a cylinder that passes through from top to bottom, and the inner cylinder 2 is also a cylinder, but the two ends of the inner cylinder 2 are sealed, and a number of diversion holes 6 are opened on the cylinder wall of the inner cylinder 2. The diversion holes 6 are circular and evenly distributed on the cylinder wall of the inner cylinder 2. The diameter of the diversion holes 6 is φ8mm, and it is ensured that the total area of ​​the openings on the inner cylinder 2 is 4 to 5 times the flow area of ​​the outer cylinder 1. The fixing rod 3 is connected to the inner cylinder 2, and the axis of the fixing rod 3 coincides with the axis of the inner cylinder 2. There are a number of silicone sheets 4 vertically connected to the fixing rod 3, and the silicone sheets 4 are evenly distributed on the fixing rod 3. The spacing between two adjacent silicone sheets 4 is 10mm, and the thickness of each silicone sheet 4 is 3mm, and the maximum diameter of the silicone sheet 4 should be 4mm smaller than the inner diameter of the inner cylinder 2. The noise reduction muffler designed by the present invention, with the synergistic effect of the aforementioned technical elements, significantly reduces the operating noise of the vacuum pump, thus solving the technical problems that are difficult to solve in the prior art.

[0032] The fixing rod 3 passes through the inner cylinder 2, and lock nuts 5 are respectively threadedly connected at both ends of the fixing rod 3, and the fixing rod 3 is fixed to the inner cylinder 2 by tightening the two lock nuts 5. The outer shape of the silicone sheet 4 can be circular, polygonal, plum blossom-shaped, etc. The sizes of the silicone sheets 4 can be the same, so that the silicone sheets 4 are distributed in a columnar shape on the fixing rod 3. The sizes of the silicone sheets 4 can also be changed in sequence according to the stacking direction, so that the silicone sheets 4 fixed on the fixing column are distributed in a cone or other shapes to target noises with different audio frequencies and airflow pressures. Preferably, for a vacuum suction pump, the arrangement shape of the silicone sheet 4 is a cone with a large top and a small bottom, and the size of the silicone sheet 4 gradually increases along the direction of the airflow.

[0033] The noise reduction muffler of the present invention divides the cavity into two parts, an inner part and an outer part, by arranging an inner cylinder 2 in an outer cylinder 1. After the airflow enters the cavity, it is disturbed and diverted after passing through the diversion hole 6 of the inner cavity. After the airflow enters the inner cylinder 2, the silicone sheet 4 has a certain blocking effect on the airflow and absorbs the high-frequency rotation noise. The airflow reduces the frequency and intensity of the noise under the disturbance and adsorption of the multi-layer silicone sheet 4.

[0034] The vacuum suction pump of the present invention is provided with a noise reduction muffler at the end of the exhaust pipe 8, and the wall of the exhaust pipe 8 is used as a part of the outer cylinder 1 of the noise reduction muffler. The outer cylinder 1 is formed into a complete one by adding an extended cylinder 9, which facilitates the noise reduction modification of the vacuum pump 7.

[0035] The present invention has a simple structure and can reduce the noise rate by 85% without affecting the normal exhaust volume and suction pressure of the vacuum suction pump, thereby reducing the working noise of the vacuum pump 7 to below the safe noise level of 30 decibels.

Claims

1. A noise reduction muffler, It is characterized in that It includes an outer cylinder, an inner cylinder, a fixed rod and a silicone sheet; the outer cylinder is a cylinder that passes through from top to bottom, the two ends of the inner cylinder are sealed, a number of diversion holes are opened on the cylinder wall of the inner cylinder, and the inner cylinder is sleeved in the outer cylinder, the fixed rod is connected to the inner cylinder, the axis of the fixed rod coincides with the axis of the inner cylinder, and a number of silicone sheets are vertically connected to the fixed rod; the size of the silicone sheet increases from bottom to top along the arrangement direction, and the maximum diameter of the silicone sheet should be 4mm smaller than the inner diameter of the inner cylinder; the diversion holes are circular and evenly distributed on the cylinder wall of the inner cylinder; the diameter of the diversion holes is φ8mm, and the total area of ​​the holes on the inner cylinder is 4 to 5 times the flow area of ​​the outer cylinder; the spacing between two adjacent silicone sheets is 10mm; the thickness of the silicone sheet is 3mm.

2. The noise reduction muffler according to claim 1, It is characterized in that The fixing rod passes through the inner cylinder, and lock nuts are respectively threadedly connected at both ends of the fixing rod.

3. A vacuum suction pump, comprising a vacuum pump, an exhaust pipe and a noise reduction muffler, It is characterized in that The noise reduction silencer includes an outer cylinder, an inner cylinder, a fixing rod and a silicone sheet; the outer cylinder is a cylinder that passes through from top to bottom, the inner cylinder is sealed at both ends, a number of diversion holes are opened on the cylinder wall of the inner cylinder, and the inner cylinder is sleeved in the outer cylinder, the fixing rod is connected to the inner cylinder, the axis of the fixing rod coincides with the axis of the inner cylinder, and a number of silicone sheets are vertically connected to the fixing rod; the size of the silicone sheet increases from bottom to top along the arrangement direction, and the maximum diameter of the silicone sheet should be 4mm smaller than the inner diameter of the inner cylinder; the diversion holes are circular and evenly distributed on the cylinder wall of the inner cylinder; the diameter of the diversion holes is φ8mm, and the total area of ​​the openings on the inner cylinder is 4 to 5 times the flow area of ​​the outer cylinder; the spacing between two adjacent silicone sheets is 10mm; the thickness of the silicone sheet is 3mm.

4. The vacuum suction pump according to claim 3, It is characterized in that It also includes an extended cylinder, which is installed at the end of the exhaust pipe. The extended cylinder and the exhaust pipe together form an outer cylinder of the noise reduction muffler.

5. The vacuum suction pump according to claim 3, It is characterized in that The inner cylinder is divided into two parts, an upper part and an lower part, and the mating surfaces of the upper part and the lower part of the inner cylinder are flush with the mating surfaces of the exhaust pipe and the extension cylinder.

6. A method for reducing the noise of a vacuum suction pump, It is characterized in that The following steps are involved: a. A fixing rod is provided and a plurality of silicone sheets are evenly arranged along the fixing rod. The size of the silicone sheets increases from bottom to top along the arrangement direction, and the maximum diameter of the silicone sheets should be 4mm smaller than the inner diameter of the inner cylinder; b. Set the upper and lower parts of the inner cylinder and connect them to the two ends of the fixed rod respectively. Align the upper and lower parts of the inner cylinder with each other and place the silicone sheet inside the inner cylinder. Screw the lock nuts at both ends of the fixed rod to fix the inner cylinder and the fixed rod together. c. Place the lower half of the inner cylinder into the exhaust pipe port of the vacuum suction pump, and align the mating surfaces of the upper and lower halves of the inner cylinder with the top surface of the exhaust pipe; d. Install the extension cylinder on the upper end of the exhaust pipe and use bolts to fasten the flange of the exhaust pipe and the flange of the extension cylinder.

Images