Silencer for fan of sand blasting machine

Abstract

The utility model discloses a silencer for a fan of a sand blasting machine, which relates to the field of silencer equipment and comprises a shell, a first air inlet pipe is fixedly connected to the bottom of the shell, a second air inlet pipe is fixedly connected to one end, far away from the shell, of the first air inlet pipe, and a first connecting plate is fixedly connected to one side, close to the second air inlet pipe, of the outer wall of the first air inlet pipe. And a second connecting plate is fixedly connected to the end, close to the first air inlet pipe, of the outer wall of the second air inlet pipe, multiple sets of first bolts are in threaded connection with the interiors of the first connecting plate and the second connecting plate, a filter screen is arranged in the first air inlet pipe, and a connecting block is fixedly connected to each of the two sides of the outer wall of the filter screen. Dust and other impurities in entering air are intercepted through the filter screen, the first connecting plate and the second connecting plate can be separated by taking out the first bolt, and therefore the filter screen can be conveniently taken out to be cleaned; the top cover and the shell are connected and fixed through second bolts, and the silencing plate is fixed by matching the top cover with the shell.

Description

Technical Field

[0001] The utility model relates to the field of muffler equipment, in particular to a muffler for a sandblasting machine fan. Background Art

[0002] Sandblasting machine belongs to the category of air conveying machinery. It uses compressed air to transport powdered particles (diameter 1-4mm) from one place to another in the pipeline. In the process of converting kinetic energy into potential energy, the high-speed moving sand particles scour the surface of the object to improve the surface quality of the object. At present, fans are common equipment in many fields. They are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and air induction of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selection of grains, wind tunnel wind source and inflation and propulsion of hovercraft, etc. However, since the fan relies on input mechanical energy to increase gas pressure and discharge gas, the fan will generate a lot of noise during operation. The fan muffler can significantly reduce the noise of the fan during operation.

[0003] After searching the existing Chinese patent: Muffler for sandblasting machine fan and sandblasting machine (Announcement No.: CN 218235615U) includes an outer cylinder, an inner cylinder arranged inside the outer cylinder, a connector for connecting the outer cylinder and the inner cylinder, an air inlet pipe connected to the air inlet of the outer cylinder and an air outlet pipe connected to the air outlet of the outer cylinder, a first muffler medium is arranged on the inner side wall of the outer cylinder, end caps are arranged at both ends of the inner cylinder along the axial direction, and an air flow channel is formed between the outer cylinder and the outer side wall of the inner cylinder. The muffler of the utility model adopts two muffler zones, high frequency and low frequency, which can widen the muffler frequency band to the maximum width and achieve a good muffler effect.

[0004] Although the above patent adopts two silencing zones, high frequency and low frequency, which can maximize the width of the silencing band and achieve a good silencing effect, the device fan cannot filter dust when it is blowing air, and the air will drive the dust into the muffler, so that the dust will adhere to the device and affect the silencing effect. Therefore, it is necessary to invent a muffler for the sandblasting machine fan to solve the above problem. Utility Model Content

[0005] The utility model aims to provide a muffler for a sandblasting machine fan, so as to solve the problem in the above-mentioned background technology that the fan of the device cannot filter dust when it is discharging air, and the air will drive the dust into the muffler together, so that the dust will adhere to the device and affect the muffler effect.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a silencer for a sandblasting machine fan, comprising a shell, a first air inlet pipe is fixedly connected to the bottom of the shell, a second air inlet pipe is fixedly connected to the end of the first air inlet pipe away from the shell, a first connecting plate is fixedly connected to the side of the outer wall of the first air inlet pipe close to the second air inlet pipe, a second connecting plate is fixedly connected to the end of the outer wall of the second air inlet pipe close to the first air inlet pipe, the first connecting plate and the second connecting plate are internally threadedly connected to multiple groups of first bolts, and the multiple groups of first bolts are rectangularly distributed inside the first connecting plate and the second connecting plate, a filter is arranged inside the first air inlet pipe, a connecting block is fixedly connected to each side of the outer wall of the filter, and two groups of grooves are provided at the intersection of two groups of connecting blocks with the first air inlet pipe.

[0007] Preferably, an end of the outer wall of the second air inlet duct away from the second connecting plate is fixedly connected to a third connecting plate.

[0008] Preferably, a sound-absorbing plate is provided inside the shell, and sound-absorbing rock wool is fixedly connected inside the sound-absorbing plate.

[0009] Preferably, the inner wall of the sound-absorbing plate is provided with a plurality of groups of through holes, and the plurality of groups of through holes are distributed in a ring shape on the inner wall of the sound-absorbing plate.

[0010] Preferably, a first flange is fixedly connected to the top end of the outer wall of the shell, and a top cover is fixedly connected to the top end of the shell.

[0011] Preferably, an air outlet duct is fixedly connected to the top of the top cover, and a second flange is fixedly connected to the outer wall of the top cover.

[0012] Preferably, the second flange and the first flange are internally threadedly connected with a plurality of groups of second bolts, and the plurality of groups of second bolts are distributed in an annular shape inside the second flange and the first flange.

[0013] Technical effects and advantages of the utility model:

[0014] 1. By setting a first air inlet pipe, a second air inlet pipe, a first connecting plate, a second connecting plate, a first bolt, a filter, a connecting block, and a groove, impurities such as dust in the incoming air can be intercepted and filtered through the filter, and then the groove cooperates with the connecting block to fix the position of the filter, and then the first bolt is removed to separate the first connecting plate from the second connecting plate, driving the first air inlet pipe to be separated from the second air inlet pipe, thereby facilitating the removal of the filter for cleaning. The advantage is that impurities such as dust in the incoming air can be intercepted through the filter, and the first bolt is removed to separate the first connecting plate from the second connecting plate, thereby facilitating the removal of the filter for cleaning.

[0015] 2. By setting the shell, the silencer plate, the silencer rock wool, the first flange, the top cover, the second flange and the second bolt, the silencer rock wool can be stuffed into the receiving groove inside the silencer plate, and then placed in the shell, covered with the top cover to fix it, and then the first flange and the second flange are connected and fixed by the second bolt, which drives the shell and the top cover to be connected and fixed. The advantage is that the top cover and the shell can be connected and fixed by the second bolt, and the silencer plate can be fixed by the top cover and the shell connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The utility model is a schematic diagram of the main structure of a silencer for a sandblasting machine fan.

[0018] Figure 2 The utility model is a schematic diagram of the structure of a muffler used for a sandblasting machine fan from a top view.

[0019] Figure 3 The utility model is a schematic diagram of the cutaway structure of a muffler for a sandblasting machine fan.

[0020] Figure 4 The utility model is a schematic diagram of the explosion structure of a silencer for a sandblasting machine fan.

[0021] In the figure: 1. shell; 2. first air inlet pipe; 3. second air inlet pipe; 4. first connecting plate; 5. second connecting plate; 6. first bolt; 7. filter; 8. connecting block; 9. groove; 10. third connecting plate; 11. silencer plate; 12. silencer rock wool; 13. through hole; 14. first flange; 15. top cover; 16. air outlet pipe; 17. second flange; 18. second bolt. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] The utility model provides Figure 1-4 A silencer for a sandblasting machine fan shown in the figure comprises a shell 1, wherein the shell 1 is used to cooperate with internal components to silence the flowing airflow; a first air inlet pipe 2 is fixedly connected to the bottom of the shell 1, wherein the first air inlet pipe 2 is used to cooperate with the second air inlet pipe 3 to deliver the airflow into the shell 1; the first air inlet pipe 2 is fixedly connected to the second air inlet pipe 3 at one end away from the shell 1, wherein the second air inlet pipe 3 is used to cooperate with the first air inlet pipe 2 to deliver the airflow into the shell 1; a first connecting plate 4 is fixedly connected to a side of the outer wall of the first air inlet pipe 2 close to the second air inlet pipe 3, wherein the first connecting plate 4 is provided to drive the first air inlet pipe 2; a second connecting plate 5 is fixedly connected to an end of the outer wall of the second air inlet pipe 3 close to the first air inlet pipe 2, wherein the second connecting plate 5 is provided to drive the second air inlet pipe 2. The air duct 3 is arranged; the internal threads of the first connecting plate 4 and the second connecting plate 5 are connected with multiple groups of first bolts 6, and the multiple groups of first bolts 6 are distributed in the first connecting plate 4 and the second connecting plate 5 in a rectangular shape, wherein the first bolts 6 are used to connect and fix the first connecting plate 4 and the second connecting plate 5, and drive the first air inlet duct 2 and the second air inlet duct 3 to be connected and fixed; the interior of the first air inlet duct 2 is provided with a filter 7, wherein the filter 7 is used to intercept dust and other impurities in the incoming air; each side of the outer wall of the filter 7 is fixedly connected with a connecting block 8, wherein the connecting block 8 is used to fix the position of the filter 7 in conjunction with the groove 9; two groups of grooves 9 are provided at the intersection of the two groups of connecting blocks 8 and the first air inlet duct 2, wherein the groove 9 is provided to accommodate the connecting block 8 internally.

[0024] A third connecting plate 10 is fixedly connected to one end of the outer wall of the second air inlet pipe 3 away from the second connecting plate 5, wherein the third connecting plate 10 is provided for connecting to the air outlet of the fan.

[0025] A silencer plate 11 is arranged inside the shell 1, wherein the silencer plate 11 is used to cooperate with the silencer rock wool 12 to reduce the noise generated by the airflow; the silencer rock wool 12 is fixedly connected to the inside of the silencer plate 11, wherein the silencer rock wool 12 is used to achieve the purpose of noise reduction and silencing through the friction and viscous resistance of the small holes when the noise drives the air molecules to vibrate.

[0026] The inner wall of the muffler plate 11 is provided with a plurality of through holes 13 , which are distributed in a ring shape on the inner wall of the muffler plate 11 , wherein the through holes 13 are provided to allow noise sound waves to penetrate therein.

[0027] A first flange 14 is fixedly connected to the top of the outer wall of the shell 1, wherein the first flange 14 is used to drive the shell 1; a top cover 15 is fixedly connected to the top of the shell 1, wherein the top cover 15 is used to connect with the shell 1, thereby fixing the silencer 11.

[0028] An air outlet pipe 16 is fixedly connected to the top of the top cover 15 , wherein the air outlet pipe 16 is provided for exhausting air flow; a second flange 17 is fixedly connected to the outer wall of the top cover 15 , wherein the second flange 17 is provided for driving the top cover 15 .

[0029] The second flange 17 and the first flange 14 are internally threadedly connected with a plurality of groups of second bolts 18, which are distributed in a ring shape inside the second flange 17 and the first flange 14, wherein the second bolts 18 are used to connect and fix the first flange 14 and the second flange 17, thereby driving the top cover 15 to be connected and fixed to the housing 1.

[0030] Working principle: When using the silencer for the sandblasting machine fan, the user connects the second air inlet pipe 3 to the air outlet of the fan through the third connecting plate 10, and then inserts the silencer rock wool 12 into the receiving groove inside the silencer plate 11, and then places it in the shell 1, covers it with the top cover 15 to fix it, and then connects and fixes the first flange 14 and the second flange 17 with the second bolt 18, driving the shell 1 and the top cover 15 to be connected and fixed; then the position of the filter screen 7 can be fixed by the groove 9 and the connecting block 8, and then the airflow enters the first air inlet pipe 2 through the second air inlet pipe 3 After passing through the filter 7, the filter 7 intercepts and filters impurities such as dust in the incoming air, and then the airflow enters the shell 1, and the noise sound waves generated by the airflow diffuse toward the inside of the shell 1, so that the noise sound waves can diffuse into the silencer plate 11 through the through hole 13. When the noise drives the air molecules to vibrate, the silencer rock wool 12 in the silencer plate 11 achieves the purpose of noise reduction and silencing through the friction and viscous resistance of the small holes; thereafter, the user removes the first bolt 6 to separate the first connecting plate 4 from the second connecting plate 5, and drives the first air inlet pipe 2 to separate from the second air inlet pipe 3, thereby facilitating the removal and cleaning of the filter 7.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A muffler for a sandblasting machine fan, comprising a housing (1), characterized in that: The bottom of the shell (1) is fixedly connected to a first air inlet pipe (2); an end of the first air inlet pipe (2) away from the shell (1) is fixedly connected to a second air inlet pipe (3); a first connecting plate (4) is fixedly connected to a side of the outer wall of the first air inlet pipe (2) close to the second air inlet pipe (3); an end of the outer wall of the second air inlet pipe (3) close to the first air inlet pipe (2) is fixedly connected to a second connecting plate (5); the first connecting plate (4) and the second connecting plate (5) are internally threadedly connected to a plurality of groups of first bolts (6); the plurality of groups of first bolts (6) are rectangularly distributed inside the first connecting plate (4) and the second connecting plate (5); a filter screen (7) is arranged inside the first air inlet pipe (2); a connecting block (8) is fixedly connected to each side of the outer wall of the filter screen (7); two groups of grooves (9) are provided at the intersection of the two groups of connecting blocks (8) and the first air inlet pipe (2).

2. The muffler for a sandblasting machine fan according to claim 1, characterized in that: A third connecting plate (10) is fixedly connected to one end of the outer wall of the second air inlet pipe (3) away from the second connecting plate (5).

3. The muffler for a sandblasting machine fan according to claim 1, characterized in that: A sound-absorbing plate (11) is arranged inside the shell (1), and sound-absorbing rock wool (12) is fixedly connected inside the sound-absorbing plate (11).

4. The muffler for a sandblasting machine fan according to claim 3, characterized in that: The inner wall of the muffler plate (11) is provided with a plurality of groups of through holes (13), and the plurality of groups of through holes (13) are distributed in an annular shape on the inner wall of the muffler plate (11).

5. The muffler for a sandblasting machine fan according to claim 1, characterized in that: A first flange (14) is fixedly connected to the top end of the outer wall of the shell (1), and a top cover (15) is fixedly connected to the top end of the shell (1).

6. A muffler for a sandblasting machine fan according to claim 5, characterized in that: The top end of the top cover (15) is fixedly connected to an air outlet pipe (16), and the outer wall of the top cover (15) is fixedly connected to a second flange (17).

7. A muffler for a sandblasting machine fan according to claim 6, characterized in that: The second flange (17) and the first flange (14) are internally threadedly connected with a plurality of second bolts (18), and the plurality of second bolts (18) are distributed in an annular shape inside the second flange (17) and the first flange (14).

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