Improved silencer for electromagnetic valve

Abstract

The utility model discloses an improved silencer for an electromagnetic valve, and particularly relates to the technical field of silencers, which comprises a shell, an air inlet part is mounted at the top of one end of the shell, a partition plate is arranged in the shell, a first silencing cavity is formed on one side of the partition plate, and a second silencing cavity is arranged on the other side of the partition plate. A first exhaust port is formed in the partition plate, a second exhaust port is formed in the top end of one side of the second silencing cavity and provided with a metal net, a drainage groove is formed in the bottom end of the second silencing cavity and connected with a drainage pipe, and the air inlet part comprises an air inlet pipe, an exhaust head and a fixing nut. The bottom end of the air inlet pipe is connected with an exhaust head, and the air inlet pipe is installed on the shell through a fixing nut. By means of the room type silencing principle and the special structural design, the airflow speed is reduced in three times, noise is effectively reduced, the arc-shaped plate can guide airflow and drain water, the metal net can prevent pollutants from entering, and the performance of the silencer is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the muffler technical field more specifically, the utility model relates to a kind of improved muffler for solenoid valve. BACKGROUND

[0002] In modern industrial system, solenoid valve as the key element in the field of automation control is widely used in various fluid control systems, such as pneumatic system, hydraulic system, etc. When solenoid valve works, its exhaust process will produce strong noise, which has caused many troubles in actual production scene.

[0003] From the production environment point of view, the number of solenoid valves in industrial workshop is large, and the exhaust noise produced by them is superimposed, which makes the overall noise level of the workshop rise sharply. Long-term exposure to high decibel noise environment, workers are prone to fatigue, lack of concentration and other problems, which not only reduces work efficiency, but also causes irreversible damage to workers' hearing system, increases the risk of occupational health. For example, in the automated production line of automobile manufacturing plant, a large number of solenoid valves work together, and the noise produced often exceeds the limit value specified in the occupational health standard, which seriously affects the physical and mental health of workers.

[0004] For the equipment itself, the exhaust noise is too high, which will interfere with the running accuracy of the surrounding precision instruments and equipment. For example, in semiconductor manufacturing workshop, the exhaust noise of solenoid valve may cause slight vibration of the equipment, which will affect the high-precision processes such as lithography and etching in the chip manufacturing process, resulting in the increase of product defective rate and the increase of production cost.

[0005] At present, although there are many solenoid valve muffler products on the market, they generally have performance defects. Some mufflers only rely on simple sound-absorbing materials to reduce noise, and the noise reduction effect is limited, which can not meet the requirements of noise control in harsh working environment. For example, in the noise-sensitive laboratory environment, these mufflers can not effectively suppress the exhaust noise of solenoid valve, which will interfere with the normal progress of experiment.

[0006] At the same time, the muffler also has shortcomings in dealing with condensate and pollutants. In some humid working environment, the moisture in the exhaust gas of solenoid valve is easy to condense into condensate and accumulate in the interior of muffler. This not only corrodes the internal structure of muffler and shortens its service life, but also may cause the muffling channel to be blocked, further reducing the muffling effect. Moreover, many mufflers do not have effective protective measures to prevent dust, oil stains and other pollutants in the working site from entering, so that the performance of muffler decreases sharply in a short time, frequent replacement of muffler increases maintenance cost and downtime, and affects the continuity of production.

[0007] Therefore, an improved muffler for solenoid valve is proposed. UTILITY MODEL CONTENT

[0008] In order to overcome the above-mentioned defects of the prior art, the utility model provides an improved muffler for solenoid valve to solve the problems raised in the above background art.

[0009] In order to achieve the above object, the utility model provides the following technical scheme: an improved muffler for solenoid valve, including the shell, the shell one end top is equipped with the air inlet part, is provided with the baffle in the shell, the baffle one side forms the first sound attenuation chamber, the baffle other side is provided with the second sound attenuation chamber, is equipped with the first exhaust port on the baffle, the second sound attenuation chamber chamber one side top is equipped with the second exhaust port, the second exhaust port is equipped with the metal net, the second sound attenuation chamber bottom is equipped with the drainage groove, the drainage groove is connected with the drain pipe.

[0010] Preferably, the air inlet part includes an air inlet pipe, an exhaust head and a fixing nut, the bottom end of the air inlet pipe is connected with the exhaust head, and the air inlet pipe is installed on the shell through the fixing nut.

[0011] Preferably, the exhaust head is in a horn structure, and the horn mouth area at the bottom of the exhaust head is six times the cross-sectional area of the air inlet pipe.

[0012] Preferably, the area of the first exhaust port is twice the horn mouth area at the bottom of the exhaust head, and the area of the second exhaust port is twice the area of the first exhaust port.

[0013] Preferably, the first arc-shaped plate is arranged at the inner bottom end of the first sound attenuation chamber, and the second arc-shaped plate is arranged at the inner top end of the second sound attenuation chamber.

[0014] Preferably, the opening rate of the metal net reaches 85%.

[0015] The utility model discloses a technical effect and advantage:

[0016] 1. Adopting chamber type sound attenuation principle and sound insulation structure, the air flow velocity is sequentially reduced through the horn mouth of the air inlet part, the first exhaust port and the second exhaust port, so that the air flow velocity of the exhaust port is reduced to 1 / 24 of the original velocity for three times, according to the principle of gravitational energy, the sound energy is reduced to 1 / 576 of the original sound energy, and for every 1 / 2 reduction of the sound energy, the sound pressure level is reduced by 3dB, so that the exhaust noise intensity of the pneumatic solenoid valve can be effectively reduced to below the specified limit value.

[0017] 2. The first arc-shaped plate at the inner bottom end of the first sound attenuation chamber and the second arc-shaped plate at the inner top end of the second sound attenuation chamber can guide the air flow of the exhaust air and guide the air flow direction, and the second arc-shaped plate cooperates with the drainage groove and the drain pipe at the bottom to gather and timely discharge the condensed water generated by the exhaust air, so that the normal operation of the muffler is ensured.

[0018] 3. The metal mesh installed through the second exhaust port has an opening rate of 85%, which can effectively prevent pollutants from the work site from entering the muffler, ensuring the cleanliness of the muffler's interior and extending its service life. Attached Figure Description

[0019] Fig. 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Fig. 2 This is a schematic diagram of the internal structure of this utility model.

[0021] Fig. 3 This is a schematic diagram of the air intake section of this utility model.

[0022] The attached figures are labeled as follows: 1. Outer shell; 2. Air inlet; 201. Air inlet pipe; 202. Exhaust head; 203. Fixing nut; 3. Metal mesh; 4. Drain pipe; 5. First arc-shaped plate; 6. Partition plate; 7. First exhaust port; 8. Second arc-shaped plate; 9. Second exhaust port; 10. Drainage groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] As attached Figs. 1-3 An improved silencer for a solenoid valve is shown, comprising a housing 1. The housing 1 consists of, from the outside to the inside, a metal plate, a first damping layer, a first sound-absorbing layer, and a first perforated plate. An air inlet 2 is installed at the top of one end of the housing 1. A partition 6 is provided inside the housing 1. A first silencing cavity is formed on one side of the partition 6. Two second perforated plates are provided outside the partition 6. A second damping layer and a second sound-absorbing layer are provided between the two second perforated plates. A second silencing cavity is provided on the other side of the partition 6. A first exhaust port 7 is provided on the partition 6. A second exhaust port 9 is provided at the top of one side of the second silencing cavity. A metal mesh 3 is installed at the second exhaust port 9. A drainage groove 10 is provided at the bottom of the second silencing cavity. The drainage groove 10 is connected to a drain pipe 4.

[0025] In the embodiment, the exhaust end of the pneumatic electromagnetic valve is connected with the air inlet part of the muffler through a hose to realize the exhaust gas derelict muffling. Specifically, the gas enters the shell 1 from the air inlet part 2. Since the bottom of the air inlet part 2 is in a horn structure and the horn mouth at the bottom is six times the area of the air inlet end, the exhaust gas realizes the first reduction of the airflow speed when passing through the horn mouth, and the airflow speed is reduced to 1 / 6 of the original speed. Then, the exhaust gas enters the second muffling cavity from the first exhaust port 7 which has an area twice that of the horn mouth. In the process of passing through the first exhaust port 7, the airflow speed is reduced for the second time, and the speed is reduced to 1 / 12 of the original speed. Then, the exhaust gas is discharged from the second exhaust port 9 which has an area twice that of the first exhaust port 7. When the exhaust gas passes through the second exhaust port 9, the airflow speed is reduced for the third time, and the airflow speed is reduced to 1 / 24 of the original speed. In this way, the noise level is greatly reduced through complex sound reflection and reduction. The gas after the effective muffling treatment is filtered through the metal mesh installed at the second exhaust port 9 and then discharged.

[0026] The air inlet part 2 comprises an air inlet pipe 201, an exhaust head 202 and a fixing nut 203. The bottom end of the air inlet pipe 201 is connected with the exhaust head 202. The air inlet pipe 201 is installed on the shell 1 through the fixing nut 203.

[0027] The exhaust head 202 is in a horn structure, and the horn mouth area at the bottom of the exhaust head 202 is six times the cross-sectional area of the air inlet pipe 201.

[0028] The area of the first exhaust port 7 is twice the horn mouth area at the bottom of the exhaust head 202, and the area of the second exhaust port 9 is twice the area of the first exhaust port 7.

[0029] The first arc-shaped plate 5 is arranged at the inner bottom end of the first muffling cavity, and the second arc-shaped plate 8 is arranged at the inner top end of the second muffling cavity.

[0030] In the embodiment, the first arc-shaped plate 5 and the second arc-shaped plate 8 are respectively installed in the right-angle regions in the first muffling cavity and the second muffling cavity, so as to guide the flow direction of the exhaust gas and guide the airflow. The second arc-shaped plate 8 cooperates with the drain groove 10 at the bottom to gather the condensed water, and cooperates with the drain pipe to facilitate water drainage, so as to ensure that the condensed water of the exhaust gas can be discharged in time.

[0031] The opening rate of the metal mesh 3 is 85%, so as to prevent pollutants in the operation site from entering the muffler.

[0032] Specific principle: the air flow speed of the exhaust outlet is generally 30 m / s, and the air flow speed of the final gas discharge port of the muffler is 1.25 m / s, so as to reduce the noise level. The chamber type muffling principle is adopted, and the sound insulation structure is arranged, so that the air flow speed of the exhaust port is reduced to 1 / 24 of the original speed in three times. According to the gravity energy principle, the sound energy can be reduced to 1 / 576 of the original sound energy. When the sound energy is reduced by 1 / 2, the sound pressure level is reduced by 3 dB. The exhaust noise intensity of the pneumatic electromagnetic valve can be reduced to below the specified limit.

[0033] The above only describes preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An improved muffler for solenoid valve comprising a housing (1), characterized in that: The shell (1) one end top is equipped with air inlet part (2), the shell (1) is provided with baffle (6), the baffle (6) one side forms first sound attenuation chamber, the baffle (6) other side is provided with second sound attenuation chamber, the baffle (6) is equipped with first exhaust port (7), the second sound attenuation chamber chamber one side top is equipped with second exhaust port (9), the second exhaust port (9) is equipped with metal screen (3), the second sound attenuation chamber bottom is equipped with drainage groove (10), the drainage groove (10) is connected with drain pipe (4).

2. The muffler for a solenoid valve according to claim 1, characterized in that: The air inlet part (2) includes an air inlet pipe (201), an exhaust head (202) and a fixing nut (203), the bottom end of the air inlet pipe (201) is connected with the exhaust head (202), and the air inlet pipe (201) is installed on the shell (1) through the fixing nut (203).

3. The muffler for a solenoid valve according to claim 2, characterized in that: The exhaust head (202) is in a horn shape, and the area of the horn mouth at the bottom of the exhaust head (202) is six times the cross-sectional area of the air inlet pipe (201).

4. The muffler for a solenoid valve according to claim 3, wherein: The area of the first exhaust port (7) is twice the area of the horn mouth at the bottom of the exhaust head (202), and the area of the second exhaust port (9) is twice the area of the first exhaust port (7).

5. The muffler for a solenoid valve according to claim 4, wherein: The first sound attenuation chamber is provided with a first arc-shaped plate (5) at the bottom, and the second sound attenuation chamber is provided with a second arc-shaped plate (8) at the top.

6. The muffler for a solenoid valve according to claim 5, wherein: The opening rate of the metal screen (3) is 85%.

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