CN219412847U

CN219412847U - Muffler with non-return effect

Info

Publication number: CN219412847U
Application number: CN202320693533.7U
Authority: CN
Inventors: 李淑强; 黄建军
Original assignee: Liyuan Xiamen Technology Co ltd
Current assignee: Liyuan Xiamen Technology Co ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-07-25
Anticipated expiration: 2033-03-31

Abstract

The utility model provides a muffler with a non-return function, which comprises a muffler main body, a non-return part and a silencing part. The silencer main body is provided with an air flow pipeline, and an air inlet of the air flow pipeline forms an installation opening. The non-return part comprises an annular cover, a sealing piece, a limiting rod and a spring. The annular cover is arranged on the mounting opening, and the middle part of the annular cover is provided with an air inlet hole. The sealing piece area is larger than the air inlet hole, and a plurality of limiting guide holes are formed in the periphery of the sealing piece. The limiting rod and the spring are provided with a plurality of groups. One end of the limiting rod penetrates through the limiting guide hole, the sealing piece is movably mounted on the inner side face of the annular cover, and the other end of the limiting rod is provided with a limiting head. The spring is in a pre-tightening state and sleeved on the limiting rod, one end of the spring props against the limiting head, and the other end of the spring props against the sealing piece. The silencing component is arranged at one end of the airflow pipeline, which is close to the air outlet. The silencer provided by the utility model can prevent external air from flowing into the vacuum pump or the vacuum tank.

Description

Muffler with non-return effect

Technical Field

The utility model relates to a muffler with a non-return function.

Background

When the vacuum pump or the vacuum tank is exhausted, the exhaust nozzle thereof generates no small noise, and therefore, a muffler for the vacuum pump or the vacuum tank is commercially available. However, for devices with a large displacement, such as a vacuum pump or a vacuum tank, existing silencers still have problems, specifically as follows: 1. for some large workshops, a plurality of vacuum pump sets and vacuum tanks work in turn to provide uninterrupted vacuum treatment for equipment, the situation that the vacuum pump sets and the vacuum tanks are connected to the same exhaust pipe in parallel exists, and the vacuum pump or the vacuum tank in operation is easy to discharge air into the vacuum pump or the vacuum tank in a shutdown state, so that a check valve is required to be additionally arranged on a pipeline, the cost of the pipeline is increased, and the installation difficulty of the pipeline is also increased; 2. aiming at a vacuum pump or a vacuum tank with large exhaust capacity and high flow speed, the existing silencer obviously has the problem of poor silencing effect. It follows that the silencer for a vacuum pump or a vacuum tank has a structure to be improved.

Disclosure of Invention

The utility model provides a silencer structure with a non-return function for solving the technical problems.

A muffler with non-return function comprises a muffler main body, a non-return part and a silencing part, wherein,

the silencer main body is provided with an air flow pipeline, and an air inlet of the air flow pipeline forms an installation opening.

The non-return part comprises an annular cover, a sealing piece, a limiting rod and a spring. The annular cover is arranged on the mounting opening, and the middle part of the annular cover is provided with an air inlet hole. The sealing piece area is larger than the air inlet hole, and a plurality of limiting guide holes are formed in the periphery of the sealing piece. The limiting rod and the spring are provided with a plurality of groups. One end of the limiting rod penetrates through the limiting guide hole, the sealing piece is movably mounted on the inner side face of the annular cover, and the other end of the limiting rod is provided with a limiting head. The spring is in a pre-tightening state and sleeved on the limiting rod, one end of the spring props against the limiting head, and the other end of the spring props against the sealing piece.

The silencing component is arranged at one end of the airflow pipeline, which is close to the air outlet.

When the silencer is used, the air inlet of the silencer is abutted against the air outlet of the vacuum pump or the vacuum tank, and when the vacuum pump or the vacuum tank is exhausted, high-pressure and high-speed air overcomes the elasticity of the spring, pushes up the sealing piece, enters the silencer and is exhausted. When the air flow passes through the sealing plate, a part of kinetic energy is consumed by the air flow to maintain the compression state of the spring, and the air flow passes through the rear silencing component, so that the flow speed of the air is weakened again, and finally, the generated noise is relatively reduced when the air is discharged. When the vacuum pump or the vacuum tank is closed, the sealing piece resets, the air inlet of the silencer is closed again, and meanwhile, external air flow can be prevented from entering the vacuum pump or the vacuum tank through the silencer.

Preferably, the silencing component comprises an air outlet cylinder, a partition plate and a connecting pipe. And the bottom of the air outlet cylinder is provided with an air outlet hole. At least one of the partition plates is provided with an air outlet. The air outlet barrels and the partition plates are distributed in parallel at intervals and connected through connecting pipes, and air outlets between the adjacent air outlet barrels or the adjacent partition plates are staggered. One end of the connecting pipe is communicated with the air outlet hole of the air outlet cylinder or the partition board, and the other end of the connecting pipe is connected to the adjacent partition board. And the periphery of the connecting pipe is provided with air holes.

Preferably, the silencing component is installed in the air flow pipeline in an interference fit mode or is fixed at the air outlet position of the air flow pipeline through a screw, and the silencer is simple in installation structure and easy to disassemble and assemble.

Preferably, a sealing ring is arranged between the annular cover and the sealing piece, so that the sealing effect of the non-return part can be improved.

Preferably, in order to avoid that the sealing ring is easily blown off, the sealing ring is mounted on the inner side surface of the annular cover.

Preferably, the inner side surface of the annular cover is provided with an annular groove, the diameter of the annular groove is larger than that of a ring surrounded by the limiting rod, and when the sealing ring falls off, the sealing ring is clamped on the limiting rod to avoid being blown into the silencing pipe.

Preferably, the annular cover is mounted on the muffler body by threads or screws.

Preferably, the caliber of the mounting opening is larger than that of the air outlet of the silencer main body, so that sufficient mounting space is provided for the non-return part.

Preferably, the limit rods are ten, and the end parts of the limit rods are provided with threads. The annular cover is provided with screw holes corresponding to the limiting rods, so that the sealing piece is ensured not to deflect in direction, and is even in stress and not easy to damage.

From the above description of the utility model, the utility model has the following advantages:

1. the check valve is combined into the silencer, so that the installation of the butt check valve on the exhaust pipe is reduced, and the installation flow and the pipeline cost of the exhaust pipeline under the situation that a plurality of groups of vacuum pumps or vacuum tanks are used in parallel are simplified;

2. the non-return part is arranged in the silencer, so that the silencer not only has a non-return function, but also attenuates the energy of high-speed air flow in advance through the non-return part;

3. through setting up the sealing washer of amortization part the medial surface of annular lid, reducible its condition that drops, simultaneously, let the sealing washer be in the outer lane of gag lever post, even the sealing washer drops, also can block between annular lid and the sealing washer, avoid being blown into in leading to the muffler jam in the muffler.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model.

Wherein:

FIG. 1 is an isometric view of a muffler with backstop;

FIG. 2 is a second axial view of a muffler with backstop;

FIG. 3 is a front view of a muffler with backstop;

FIG. 4 is a top view of a muffler with backstop;

FIG. 5 is a bottom view of a muffler with backstop;

FIG. 6 is a cross-sectional view I of a muffler with backstop;

FIG. 7 is a second cross-sectional view of a muffler with backstop;

FIG. 8 is an enlarged partial view of a muffler with backstop;

the identifiers in fig. 1 to 8 are respectively: the muffler comprises a muffler body 1, a mounting port 11, a non-return part 2, an annular cover 21, a sealing piece 22, a limiting rod 23, a spring 24, a sealing ring 25, a muffler component 3, an air outlet tube 31, a partition plate 32 and a connecting pipe 33.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear and obvious, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 8, a muffler having a non-return effect includes a muffler body 1, a non-return part 2 and a sound deadening part 3, wherein,

the muffler body 1 is provided with an air flow pipe, and an air inlet of the air flow pipe forms a mounting port 11. In this embodiment, the caliber of the mounting opening 11 is larger than that of the air outlet of the muffler main body 1, so as to provide sufficient mounting space for the non-return part 2.

The non-return part 2 comprises an annular cover 21, a sealing piece 22, a limit rod 23 and a spring 24.

The annular cover 21 is installed on the installation opening 11, and an air inlet hole is formed in the middle of the annular cover. In this embodiment, the annular cover 21 is mounted to the muffler body 1 by screws, and in other embodiments, threaded interfacing may be employed.

The area of the sealing piece 22 is larger than that of the air inlet hole, and a plurality of limiting guide holes are formed in the periphery of the sealing piece.

The limit rod 23 and the spring 24 have a plurality of groups, and in this embodiment, ten groups are provided, so that the direction of the sealing piece 22 is ensured not to deviate, and the sealing piece is uniformly stressed and is not easy to damage. One end of the limiting rod 23 penetrates through the limiting guide hole, the sealing piece 22 is movably mounted on the inner side face of the annular cover 21, and a limiting head is arranged at the other end of the limiting rod. The spring 24 is in a pre-tightening state and sleeved on the limiting rod 23, one end of the spring props against the limiting head, and the other end of the spring props against the sealing piece 22.

In this embodiment, a sealing ring 25 is provided between the annular cover 21 and the sealing piece 22, so that the sealing effect of the non-return member 2 can be improved. Preferably, in order to avoid that the sealing ring 25 is easily blown off, the sealing ring 25 is mounted on an inner side surface of the annular cover 21. In another embodiment, the inner side surface of the annular cover 21 is provided with an annular groove, the diameter of the annular groove is larger than the diameter of a ring surrounded by the limiting rod 23, and when the sealing ring 25 falls off, the sealing ring is clamped on the limiting rod 23 to avoid being blown into the silencing pipe.

The silencing part 3 is arranged at one end of the airflow pipeline close to the air outlet.

In one embodiment, the silencing component 3 includes an air outlet tube 31, a partition 32, and a connecting tube 33. The bottom of the air outlet tube 31 is provided with an air outlet hole. At least one of the partition plates 32 is provided with an air outlet. The air outlet cylinders 31 and the partition plates 32 are arranged in parallel at intervals and connected through connecting pipes 33, and air outlets between the adjacent air outlet cylinders 31 or the adjacent air outlet cylinders 32 are staggered. One end of the connecting pipe 33 is connected to the air outlet hole of the air outlet tube 31 or the partition plate 32, and the other end is connected to the adjacent partition plate 32. The connecting pipe 33 has air holes at the periphery thereof. Preferably, the silencing component 3 is installed in the air flow pipeline in an interference fit mode, or is fixed at the air outlet position of the air flow pipeline through a screw, and the silencer is simple in installation structure and easy to disassemble and assemble.

When the silencer is used, the air inlet of the silencer is connected with the air outlet of the vacuum pump or the vacuum tank in a butt joint mode, and when the vacuum pump or the vacuum tank is exhausted, high-pressure and high-speed air overcomes the elasticity of the spring 24, pushes up the sealing piece 22, enters the silencer and is exhausted. When the air flow passes through the sealing plate 22, a part of kinetic energy is consumed by the air flow to maintain the compressed state of the spring 24, and the air flow speed is weakened again after passing through the rear silencing part 3, and finally, the generated noise is relatively reduced when the air flow is discharged. When the vacuum pump or the vacuum tank is closed, the sealing plate 22 is reset to close the air inlet of the silencer again, and meanwhile, external air flow can be prevented from entering the vacuum pump or the vacuum tank through the silencer.

While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the above embodiments, but is capable of being modified or applied directly to other applications without modification, as long as various insubstantial modifications of the method concept and technical solution of the utility model are adopted, all within the scope of the utility model.

Claims

1. A muffler with a non-return function is characterized by comprising a muffler main body, a non-return part and a silencing part;

the silencer main body is provided with an air flow pipeline, and an air inlet of the air flow pipeline forms a mounting port;

the non-return part comprises an annular cover, a sealing piece, a limiting rod and a spring; the annular cover is arranged on the mounting opening, and the middle part of the annular cover is provided with an air inlet hole; the sealing piece is larger than the air inlet hole in area, and a plurality of limiting guide holes are formed in the periphery of the sealing piece; the limiting rod and the spring are provided with a plurality of groups; one end of the limiting rod penetrates through the limiting guide hole, the sealing piece is movably mounted on the inner side surface of the annular cover, and the other end of the limiting rod is provided with a limiting head; the spring is in a pre-tightening state and sleeved on the limiting rod, one end of the spring props against the limiting head, and the other end of the spring props against the sealing piece;

2. The muffler with non-return according to claim 1, wherein the silencing member includes an air outlet tube, a partition plate, and a connection tube; the bottom of the air outlet cylinder is provided with an air outlet hole; at least one of the partition plates is provided with an air outlet; the air outlet cylinders and the partition plates are distributed in parallel at intervals and connected through connecting pipes, and air outlets between the adjacent air outlet cylinders or the adjacent partition plates are staggered; one end of the connecting pipe is communicated with the air outlet hole of the air outlet cylinder or the partition board, and the other end of the connecting pipe is connected to the adjacent partition board; and the periphery of the connecting pipe is provided with air holes.

3. A muffler with a non-return function according to claim 1, wherein the sound deadening member is installed in the air flow duct by interference fit or is fixed at the air outlet position of the air flow duct by a screw.

4. A muffler with backstop according to claim 1, wherein a sealing ring is provided between the annular cover and the sealing plate.

5. The muffler with backstop of claim 4, wherein the sealing ring is mounted on the inner side of the annular cover.

6. The muffler with backstop effect according to claim 5, wherein the inner side surface of the annular cover is provided with an annular groove, and the diameter of the annular groove is larger than the circle enclosed by the limit lever.

7. A muffler with backstop according to claim 1, wherein said annular cover is mounted to said muffler body by threads or screws.

8. The muffler with backstop effect according to claim 1, wherein the mounting opening is larger in caliber than the air outlet of the muffler body.

9. The muffler with the backstop effect according to claim 1, wherein the limit rods are ten, and the end parts of the limit rods are provided with threads; the annular cover is provided with screw holes corresponding to the limiting rods.