Silencer of pneumatic diaphragm pump

Abstract

The utility model provides a pneumatic diaphragm pump silencer which comprises a connector, a shell and an end cover which are sequentially arranged from top to bottom, a tubular inner container is arranged in the shell, a connecting piece is arranged at the upper end of the shell, the shell is movably connected with the connector through the connecting piece, the shell is movably connected with the end cover, and the end cover is connected with the tubular inner container. A plurality of columnar supports and a plurality of transverse annular belts are arranged on the outer side face of the shell, a latticed structure is formed between the columnar supports and the transverse annular belts, and the silencer shell is formed by combining the columnar supports and the transverse annular belts, so that the gas passing area is increased, and the strength is sufficient; and meanwhile, the thick and strong columnar support is more convenient to hold by hand and convenient to mount or dismount on site.

Description

Technical Field

[0001] The utility model relates to the field of pneumatic diaphragm pumps, in particular to a silencer for pneumatic diaphragm pumps. Background Art

[0002] A pneumatic diaphragm pump is a new type of liquid material conveying device, which can replace the use of submersible pumps, sewage pumps, centrifugal pumps and other devices. The pump has the characteristics of small volume, light weight, convenient and flexible installation and use. Because it can transport liquids containing solid particles and has no explosion-proof problems, it is widely used in more and more industries such as petrochemical, coating, shipbuilding, water treatment, food, papermaking, mining, etc.

[0003] Since a pneumatic diaphragm pump relies on compressed air as a power source to drive the device. A pneumatic diaphragm pump is a reciprocating positive-displacement pump. The two side diaphragms are connected to both sides of the main shaft through the main shaft. Compressed air is filled into the back pressure chamber of one side diaphragm to push the diaphragm to move. When the diaphragm moves to the end point, the compressed air fills the back pressure chamber of the other side diaphragm through the air motor. At this time, the compressed air in the air chamber will be quickly discharged through the exhaust passage, otherwise it will affect the inflation of the back pressure chamber of the other side diaphragm. The exhaust occurs instantaneously, and the compressed air is discharged through the exhaust passage. At this time, the compressed air will absorb heat and at the same time emit a lot of noise. The working stroke of the main shaft is only dozens of millimeters, and the maximum number of reciprocations per minute can reach about one hundred and fifty times. Working in this environment for a long time will cause greater harm to the operator. Therefore, a silencer for eliminating noise must be installed to ensure that the environmental noise does not exceed the standard. At present, it is not convenient to replace the sound-absorbing material of the silencer. Summary of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides a silencer for a pneumatic diaphragm pump, which is convenient for replacing the sound-absorbing material.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A silencer for a pneumatic diaphragm pump includes a joint, a housing and an end cover arranged in sequence from top to bottom. A tubular inner liner is arranged in the housing. A connecting piece is arranged at the upper end of the housing. The housing is movably connected to the joint through the connecting piece. The housing is movably connected to the end cover. A plurality of columnar supports and a plurality of transverse belts are arranged on the outer side surface of the housing. A grid-like structure is formed between the plurality of columnar supports and the plurality of transverse belts.

[0007] As a further solution of the utility model, the connecting piece is movably connected to the joint by means of threaded cooperation. The housing is movably connected to the end cover by means of threaded cooperation. A hollow grid-like structure is formed between the plurality of columnar supports and the plurality of transverse belts.

[0008] As a further solution of the utility model, two sequentially connected tubular inner liners are arranged inside the shell, and the tubular inner liners are made of sound-absorbing materials.

[0009] As a further solution of the utility model, an accommodation space for accommodating the joint is arranged at the upper end of the connecting piece, and a limiting step is arranged at the lower end of the shell for snap-fitting and limiting with the end cover.

[0010] As a further solution of the utility model, the inner side of the lower end of the joint is arranged as a conical structure.

[0011] As a further solution of the utility model, several vertical reinforcing ribs are arranged at the lower end of the connecting piece.

[0012] As a further solution of the utility model, the shell is provided with 6 columnar supports and 2 transverse annular bands.

[0013] The utility model has the following beneficial effects:

[0014] The utility model is convenient for replacing the sound-absorbing material and assembling the muffler.

[0015] To more clearly illustrate the structural features and functions of the utility model, the following will combine the drawings with specific embodiments to elaborate on the utility model in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the outer shell structure of the utility model;

[0017] Figure 2 is an axial sectional view of the utility model;

[0018] Figure 3 is Figure 1 the axial sectional view of;

[0019] Figure 4 and Figure 5 are schematic diagrams of different surfaces of the end cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will further illustrate the utility model in combination with the drawings and relevant knowledge, and describe it clearly and completely. Obviously, the described applications are only part of the embodiments of the utility model, rather than all of the embodiments.

[0021] Refer to Figures 1 - 5As shown, the silencer of the pneumatic diaphragm pump of the present utility model includes a connector 1, a housing 2, and an end cap 3 arranged in sequence from top to bottom. A tubular inner liner 4 is provided inside the housing 2. A connecting member 5 is provided at the upper end of the housing 2. The housing 2 is movably connected to the connector through the connecting member 5, and the housing 2 is movably connected to the end cap 3. During use, a sound-absorbing material is placed into the tubular inner liner 4. It should be noted that in some cases, the tubular inner liner 4 is composed of a sound-absorbing material, which directly plays a role in noise reduction. It can also be composed of a perforated material, such as a mesh structure made of a polymer material. Then, the tubular sound-absorbing material is placed in the tubular inner liner 4. When replacement is needed, it can be directly replaced;

[0022] On the outer side of the housing 2, a number of columnar supports 6 and a number of transverse annular bands 7 are provided. A grid-like structure is formed between the number of columnar supports 6 and the number of transverse annular bands 7. Further preferably, a hollow grid-like structure is formed between the number of columnar supports and the number of transverse annular bands to facilitate the passage of gas. Refer to Figure 1 、 Figure 3 As shown, for the silencer housing, the combination of columnar supports and transverse annular bands not only increases the area for gas passage but also has sufficient strength. At the same time, the thick columnar supports are more convenient for holding by hand, facilitating on-site installation or disassembly. It should be noted that a grid-like structure is formed between the number of columnar supports 6 and the number of transverse annular bands 7, and this grid structure can be used for gas passage. In some embodiments, the end cap 3 is used as the gas outlet. Refer to Figure 4 、 Figure 5 As shown, a plurality of hole structures are provided at the lower end of the end cap 3 for gas outlet; in the present utility model, it is preferably adopted that a grid-like structure formed between a number of columnar supports 6 and a number of transverse annular bands 7 is used as the gas passage outlet.

[0023] In the present utility model, the housing 2 is movably connected to the connector through the connecting member 5, and the housing 2 is movably connected to the end cap 3, which can facilitate the installation and replacement of the sound-absorbing material.

[0024] In the present utility model, the connecting member 5 and the connector 1 are movably connected by a threaded fit, and the housing 2 and the end cap 3 are movably connected by a threaded fit. In some embodiments, they can also be movably connected by bolts or by a snap-fastening method. The threaded method of movable connection is preferably adopted; further preferably, the connector 1 is preferably connected to the pneumatic diaphragm pump by a threaded method.

[0025] In the present utility model, two sequentially connected tubular inner liners 4 are arranged inside the housing 2. The tubular inner liners 4 are made of sound-absorbing materials. By increasing the silencer (by increasing the length of the housing), preferably two tubular inner liners with a microporous structure made of sound-absorbing materials are adopted. When compressed air passes through the micropores, sound waves generate frictional and viscous resistance, thereby weakening the energy of the sound waves and achieving the purpose of noise reduction and silencing. The outer shell of the silencer is made by injection molding and has good corrosion resistance, and can be applied in various occasions. During the installation process, first place the tubular inner liner 4 inside the housing 2, and then rotate the end cap 3 to facilitate installation. Similarly, it is also convenient for replacement.

[0026] In the present utility model, an accommodation space for accommodating the joint 1 is arranged at the upper end of the connector 5, and it is installed by means of thread fitting. A limiting step is arranged at the lower end of the housing 2 for engaging and limiting with the end cap 3, and it is also installed by means of thread fitting, which can achieve convenient installation and limiting.

[0027] In the present utility model, the inner side of the lower end of the joint 1 is arranged as a conical structure to facilitate the passage of gas.

[0028] In the present utility model, several vertical reinforcing ribs 8 are arranged at the lower end of the connector. The silencer housing is designed as a connector to connect the pneumatic diaphragm pump body and the silencer housing. Considering that the wall thickness of the connector is relatively thin, in order to increase the strength, reinforcing ribs are added inside it, which improves the strength of the connector.

[0029] In the present utility model, the housing is provided with 6 columnar supports and 2 transverse belts. Among them, the 6 columnar supports are evenly distributed on the side of the housing, and the 2 transverse belts and the 6 columnar supports form a grid structure. Columnar supports and transverse belts are arranged on the upper part of the housing, which can ensure sufficient strength without affecting ventilation. A silencer end cap is arranged at the bottom of the housing and is connected by screw fastening; it should be noted that the columnar supports can be vertical, inclined or spiral.

[0030] The present utility model can achieve convenient replacement of the sound-absorbing materials and convenient assembly of the silencer; and after installing the new silencer, the noise during the operation of the equipment is significantly reduced. At a distance of one meter from the equipment, the noise has dropped below 80 dB, fully meeting the requirements for its impact on the environment; during use, the two silencer inner liners are smoothly placed into the silencer housing, and then the end cap at the bottom is tightened on the silencer housing to complete the assembly. The connector and the joint are tightened with a wrench at the compressed air discharge port of the pneumatic diaphragm pump, and then the silencer housing assembly is tightened.

[0031] The technical principle of the present utility model has been described above in conjunction with specific embodiments, which are only the preferred embodiments of the present utility model. It should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art, all of which fall within the protection scope of the present utility model.

Claims

1. Pneumatic diaphragm pump silencer, characterized in that: It includes a joint, a shell and an end cover which are arranged in sequence from top to bottom, a tubular liner is arranged in the shell, a connecting piece is arranged at the upper end of the shell, the shell is movably connected to the joint through the connecting piece, the shell is movably connected to the end cover, and a plurality of columnar supports and a plurality of transverse ring belts are arranged on the outer side of the shell, wherein a grid structure is formed between the plurality of columnar supports and the plurality of transverse ring belts.

2. The pneumatic diaphragm pump silencer according to claim 1, characterized in that: The connecting piece and the joint are movably connected by means of threaded fitting, the shell and the end cover are movably connected by means of threaded fitting, and a hollow grid structure is formed between the plurality of columnar supports and the plurality of transverse ring belts.

3. The pneumatic diaphragm pump silencer according to claim 1, characterized in that: Two tubular inner shells connected in sequence are arranged in the shell, and the tubular inner shells are made of sound-absorbing material.

4. The pneumatic diaphragm pump silencer according to claim 1, characterized in that: The upper end of the connecting piece is provided with an accommodating space for accommodating the joint, and the lower end of the shell is provided with a limiting step for engaging with the end cover to limit the position.

5. The pneumatic diaphragm pump silencer according to claim 1, characterized in that: The inner side of the lower end of the joint is arranged as a conical structure.

6. The pneumatic diaphragm pump silencer according to claim 1, characterized in that: A plurality of vertical reinforcing ribs are arranged at the lower end of the connecting piece.

7. The pneumatic diaphragm pump silencer according to claim 1, characterized in that: The shell is provided with 6 columnar supports and 2 transverse ring belts.

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