Vacuum generator with external silencer structure

Abstract

The utility model discloses a vacuum generator with an external silencer structure, which comprises a silencing shell and a mounting seat arranged at the top of the silencing shell, and further comprises an air inlet pipe, an air outlet pipe, an inner noise reduction pipe, an outer noise reduction pipe and a silencing barrel, the mounting seat is arranged at one end of the silencing shell, the air outlet pipe is arranged at the other end of the silencing shell, the inner noise reduction pipe is arranged above the mounting seat in a threaded mode, the outer noise reduction pipe wraps the outer side of the inner noise reduction pipe, the silencing barrel is arranged on the periphery of the outer noise reduction pipe, and a threaded groove is formed in the top of the mounting seat. The double-layer noise reduction structure of the inner noise reduction pipe and the outer noise reduction pipe is adopted, noise generated when the vacuum generator works is effectively reduced, when the vacuum generator works, generated noise sound waves enter the outer noise reduction pipe, then the sound waves interact with the sound guide rod, and the sound waves are effectively dispersed and consumed in the transmission process; and the noise reduction performance of the product is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum generators, in particular to a vacuum generator with an external muffler structure. Background Art

[0002] A vacuum generator is a vacuum component that uses a positive pressure gas source to generate negative pressure, making it very easy and convenient to obtain negative pressure in places where compressed air is available, or in places where positive and negative pressures are required at the same time in a pneumatic system. Vacuum generators are widely used in the fields of machinery, electronics, packaging, printing, plastics and robots in industrial automation.

[0003] A Chinese patent (publication number CN208010553U) discloses a multi-stage vacuum generator with an external muffler, comprising a first shell, a second shell being clamped on the upper side of the first shell, a third shell being clamped on the upper side of the second shell, internal components being fixedly installed between the second shell and the third shell, an air inlet being provided on the upper surface of the third shell, an air outlet being provided on the upper surface of the third shell, the air inlet and the air outlet being arranged side by side, an external muffler being fixedly installed in the air inlet, and internal components comprising a side plate and a vacuum filter, an exhaust hole being fixedly connected on the surface of the side plate, and the side plate being clamped on one side of the inner wall of the second shell and the third shell. The utility model provides a muffler, a threaded port, an inner bushing, an outer bushing and a sealing ring, so that the threaded port of the muffler is threadedly connected to the air inlet. When compressed air enters the vacuum generator, the air will pass through the muffler to reduce the noise, thereby avoiding the problem of excessive noise when the vacuum generator is working.

[0004] However, when the multi-stage vacuum generator with an external silencer is in use, its silencer mechanism is relatively simple and cannot effectively guide and absorb the sound inside the product, thereby affecting the noise reduction effect of the vacuum generator to a certain extent. Utility Model Content

[0005] In response to the above problems, a vacuum generator with an external silencer structure is provided. By adopting a double-layer noise reduction structure of an inner noise reduction tube and an outer noise reduction tube, the noise generated by the vacuum generator during operation is effectively reduced. When the vacuum generator is working, the noise sound waves generated will enter the outer noise reduction tube. These sound waves then interact with the sound guide rod and are effectively dispersed and consumed during the propagation process, thereby enhancing the noise reduction performance of the product.

[0006] To solve the problems of the prior art, the utility model provides a vacuum generator with an external silencer structure, comprising a silencer shell and a mounting base arranged on the top of the silencer shell, the vacuum generator also includes an air inlet pipe, an air outlet pipe, an inner noise reduction pipe, an outer noise reduction pipe and a silencer cylinder, the air inlet pipe is arranged at one end of the silencer shell, the air outlet pipe is arranged at the other end of the silencer shell, the inner noise reduction pipe is threaded above the mounting base, the outer noise reduction pipe is wrapped around the outside of the inner noise reduction pipe, the silencer cylinder is arranged on the periphery of the outer noise reduction pipe, and a wire groove is provided on the top of the mounting base, and the shape of the wire groove matches the silencer cylinder.

[0007] Preferably, a sound guide rod is distributed in a ring shape inside the outer noise reduction tube, one end of the sound guide rod is provided with a sound guide seat that fits the inner noise reduction tube, and the sound guide rod and the sound guide seat are connected by a first spring.

[0008] Preferably, a cavity is provided between the outer noise reduction pipe and the silencer tube, the interior of the cavity is filled with a silencer sponge ring, and a positioning ring plate in close contact with the silencer sponge ring is threadedly mounted on one end of the outer noise reduction pipe.

[0009] Preferably, a column is provided above the inner wall of the silencer, one end of the column is provided with a fixing seat, the fixing seat is used to fit tightly with the inner noise reduction pipe, and the column and the fixing seat are connected by a second spring.

[0010] Preferably, the outer side of the sound-absorbing shell is provided with a sound-absorbing cloth, which can effectively isolate external noise and further enhance the overall sound-absorbing effect.

[0011] Preferably, fixed bottom plates are symmetrically provided on both sides of the sound-absorbing shell, and adjacent surfaces of the two fixed bottom plates are bonded with sound-absorbing cotton.

[0012] Preferably, a positioning hole is provided on the inner wall of one of the two fixed base plates, and a positioning plate matching the positioning hole is provided on the inner wall of the other fixed base plate.

[0013] Preferably, two groups of mounting plates are symmetrically arranged on the top of the fixed base plate, each group of mounting plates is provided with two mounting plates, and every two mounting plates are connected by an auxiliary screw.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] By adopting a double-layer noise reduction structure of an inner noise reduction tube and an outer noise reduction tube, the noise generated by the vacuum generator during operation is effectively reduced. The various components of the vacuum generator, such as the inner noise reduction tube, the outer noise reduction tube and the silencer, are all modularly designed, which makes installation, disassembly and maintenance more convenient. At the same time, the modular design also improves the interchangeability of components and reduces maintenance costs. The sound guide rod distributed in an annular shape inside the outer noise reduction tube is a key part of the noise reduction structure. When the vacuum generator is working, the noise sound waves generated will enter the outer noise reduction tube. These sound waves then interact with the sound guide rod and are effectively dispersed and consumed during the propagation process. One end of the sound guide rod is provided with a sound guide seat that fits the inner noise reduction tube. This design ensures that the transmission of sound waves between the inner and outer noise reduction tubes is continuous and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the overall structure of a vacuum generator with an external silencer structure.

[0017] Figure 2 This is a schematic diagram of the explosion structure of a vacuum generator with an external silencer structure.

[0018] Figure 3 The present invention is a schematic diagram of the installation structure of the inner noise reduction pipe of a vacuum generator with an external silencer structure.

[0019] Figure 4 The present invention is a schematic diagram of the cross-sectional structure of an external noise reduction pipe of a vacuum generator with an external silencer structure.

[0020] Figure 5 The present invention is a schematic diagram of the installation structure of the silencer tube of a vacuum generator with an external silencer structure.

[0021] Figure 6 Schematic diagram of the structure at point A of a vacuum generator with an external silencer structure.

[0022] The numbers in the figure are: 1. Silencer shell; 2. Inlet pipe; 3. Exit pipe; 4. Mounting seat; 5. Internal noise reduction pipe; 6. External noise reduction pipe; 7. Silencer tube; 8. Silencer sponge ring; 9. Positioning ring plate; 10. Post; 11. Fixed seat; 12. Wire groove; 13. Sound insulation cloth; 14. Fixed bottom plate; 15. Sound-absorbing cotton; 16. Positioning hole; 17. Positioning plate; 18. Mounting plate; 19. Sound guide rod; 20. Sound guide seat. DETAILED DESCRIPTION

[0023] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Please refer to Figures 1 to 6A vacuum generator with an external silencer structure includes a silencer shell 1 and a mounting base 4 arranged on the top of the silencer shell 1. The vacuum generator also includes an air inlet pipe 2, an air outlet pipe 3, an inner noise reduction pipe 5, an outer noise reduction pipe 6 and a silencer cylinder 7. The air inlet pipe 2 is arranged at one end of the silencer shell 1, and the air outlet pipe 3 is arranged at the other end of the silencer shell 1. The inner noise reduction pipe 5 is threaded above the mounting base 4, and the outer noise reduction pipe 6 is wrapped around the outer side of the inner noise reduction pipe 5. The silencer cylinder 7 is arranged on the periphery of the outer noise reduction pipe 6. A wire groove 12 is provided on the top of the mounting base 4, and the shape of the wire groove 12 matches the silencer cylinder 7.

[0025] By adopting the double-layer noise reduction structure of the inner noise reduction tube 5 and the outer noise reduction tube 6, the noise generated by the vacuum generator during operation is effectively reduced. The various components of the vacuum generator, such as the inner noise reduction tube 5, the outer noise reduction tube 6 and the silencer 7, are all modularly designed, which makes installation, disassembly and maintenance more convenient. At the same time, the modular design also improves the interchangeability of components and reduces maintenance costs.

[0026] like Figure 3 and Figure 4 As shown, a sound guide rod 19 is distributed in a ring shape inside the outer noise reduction tube 6, and one end of the sound guide rod 19 is provided with a sound guide seat 20 that fits the inner noise reduction tube 5, and the sound guide rod 19 and the sound guide seat 20 are connected by a first spring.

[0027] The sound guide rod 19 distributed in a ring inside the outer noise reduction tube 6 is a key part of the noise reduction structure. When the vacuum generator is working, the noise sound waves generated will enter the outer noise reduction tube 6. These sound waves then interact with the sound guide rod 19 and are effectively dispersed and consumed during the propagation process. One end of the sound guide rod 19 is provided with a sound guide seat 20 that fits the inner noise reduction tube 5. This design ensures that the transmission of sound waves between the two pipes is continuous and efficient. When the sound waves propagate to the sound guide seat 20 through the sound guide rod 19, the sound waves will be further absorbed and consumed by the inner noise reduction tube 5 due to the close fit between the sound guide seat 20 and the inner noise reduction tube 5.

[0028] like Figure 3 and Figure 4 As shown, a cavity is provided between the outer noise reduction pipe 6 and the silencer tube 7, the interior of the cavity is filled with a silencer sponge ring 8, and a positioning ring plate 9 in close contact with the silencer sponge ring 8 is threadedly installed at one end of the outer noise reduction pipe 6.

[0029] When the vacuum generator is working, the noise sound waves generated will propagate into the cavity between the outer noise reduction tube 6 and the silencer tube 7. The cavity is filled with a silencer sponge ring 8. This silencer sponge material has excellent sound absorption and dissipation properties. At the same time, one end of the outer noise reduction tube 6 is threadedly installed with a positioning ring plate 9 that is in close contact with the silencer sponge ring 8. The positioning ring plate 9 fixes the silencer sponge ring 8 to prevent it from shifting or falling off during operation, and can further enhance the silencer effect.

[0030] like Figure 3 As shown, a column 10 is arranged above the inner wall of the silencer 7, and one end of the column 10 is equipped with a fixing seat 11, and the fixing seat 11 is used to fit tightly with the inner noise reduction pipe 5. The column 10 and the fixing seat 11 are connected by a second spring.

[0031] The column 10 and the fixing seat 11 are connected by the second spring. When the inner noise reduction tube 5 enters the outer noise reduction tube 6, the fixing seat 11 contacts the inner noise reduction tube 5 to limit the position, thereby improving the stability of the product during use.

[0032] like Figure 5 As shown, the outer side of the sound-absorbing shell 1 is provided with a sound-absorbing cloth 13, which can effectively isolate external noise and further improve the overall sound-absorbing effect.

[0033] like Figure 2 As shown, fixed bottom plates 14 are symmetrically provided on both sides of the muffler housing 1, and sound-absorbing cotton 15 is bonded to adjacent surfaces of the two fixed bottom plates 14.

[0034] The sound-absorbing cotton 15 is bonded to the fixing bottom plate 14 so that the sound-absorbing cotton 15 is in contact with the air inlet pipe 2 and the air outlet pipe 3, so that the sound is pre-processed to ensure the sound-absorbing quality of the product.

[0035] like Figure 1 and Figure 2 As shown, a positioning hole 16 is formed on the inner wall of one of the two fixed base plates 14 , and a positioning plate 17 matching the positioning hole 16 is formed on the inner wall of the other fixed base plate 14 .

[0036] When two fixed base plates 14 need to be connected, the positioning plate 17 of one fixed base plate 14 will be inserted into the positioning hole 16 of the other fixed base plate 14. This insertion connection method ensures accurate alignment between the two and avoids misalignment or offset.

[0037] like Figure 2 As shown, two groups of mounting plates 18 are symmetrically arranged on the top of the fixed base plate 14 , each group of the mounting plates 18 is provided with two, and every two mounting plates 18 are connected by an auxiliary screw.

[0038] When the two fixed base plates 14 are close to each other, the two mounting plates 18 are positioned by auxiliary screws, so that users can easily disassemble and assemble the product.

[0039] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A vacuum generator with an external silencer structure, comprising a silencer housing (1) and a mounting seat (4) arranged on the top of the silencer housing (1), characterized in that: The vacuum generator also includes an air inlet pipe (2), an air outlet pipe (3), an inner noise reduction pipe (5), an outer noise reduction pipe (6) and a silencer (7); the air inlet pipe (2) is arranged at one end of the silencer housing (1); the air outlet pipe (3) is arranged at the other end of the silencer housing (1); the inner noise reduction pipe (5) is threadedly mounted above the mounting seat (4); the outer noise reduction pipe (6) is wrapped around the outer side of the inner noise reduction pipe (5); the silencer (7) is arranged on the periphery of the outer noise reduction pipe (6); a wire groove (12) is provided on the top of the mounting seat (4); and the shape of the wire groove (12) matches that of the silencer (7).

2. The vacuum generator with an external muffler structure according to claim 1, characterized in that: A sound guide rod (19) is distributed in an annular shape inside the outer noise reduction tube (6), one end of the sound guide rod (19) is provided with a sound guide seat (20) that fits the inner noise reduction tube (5), and the sound guide rod (19) and the sound guide seat (20) are connected via a first spring.

3. The vacuum generator with an external muffler structure according to claim 1, characterized in that: A cavity is provided between the outer noise reduction pipe (6) and the silencer tube (7), the interior of the cavity is filled with a silencer sponge ring (8), and a positioning ring plate (9) in close contact with the silencer sponge ring (8) is threadedly mounted on one end of the outer noise reduction pipe (6).

4. The vacuum generator with an external muffler structure according to claim 3, characterized in that: A column (10) is arranged above the inner wall of the silencer (7), one end of the column (10) is provided with a fixing seat (11), the fixing seat (11) is used to fit tightly with the inner noise reduction pipe (5), and the column (10) and the fixing seat (11) are connected via a second spring.

5. The vacuum generator with an external muffler structure according to claim 1, characterized in that: The outer side of the sound-absorbing housing (1) is provided with a sound-insulating cloth (13).

6. The vacuum generator with an external muffler structure according to claim 5, characterized in that: Fixed bottom plates (14) are symmetrically provided on both sides of the muffler housing (1), and adjacent surfaces of the two fixed bottom plates (14) are both bonded with sound-absorbing cotton (15).

7. The vacuum generator with an external muffler structure according to claim 6, characterized in that: A positioning hole (16) is provided on the inner wall of one of the two fixed base plates (14), and a positioning plate (17) matching the positioning hole (16) is provided on the inner wall of the other fixed base plate (14).

8. The vacuum generator with an external muffler structure according to claim 7, characterized in that: Two groups of mounting plates (18) are symmetrically arranged on the top of the fixed base plate (14), each group of mounting plates (18) is provided with two, and every two mounting plates (18) are connected by an auxiliary screw rod.

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