Anti-backflow self-cleaning muffler protection device

Abstract

The utility model relates to industrial automatic control valve technical field, concretely relates to a backflow prevention self-cleaning silencer protection device, the utility model discloses a backflow prevention self-cleaning silencer protection device, including shell body, inner casing and double -layer sealing structure, inner casing is connected in the shell body, and the shell body is connected with valve body exhaust, and inner casing is equipped with exhaust, and the sintered net is installed to the exhaust, and the device body one end is installed with the protective cover, the utility model design double -layer sealing structure is sealed to first air inlet and second air inlet, avoids the gas etc. to pour back, installs the protective cover to the exhaust and protects the exhaust, avoids the exhaust to be exposed outside, and the protective cover forms self -cleaning space with the exhaust, utilizes the airflow impact protective cover, forms turbulent flow and washes the sintered net at self -cleaning space, solves the problem that the sintered net adheres impurity and can not clean.

Description

Technical Field

[0001] This utility model relates to the field of industrial automatic control valve technology, specifically to a backflow prevention self-cleaning silencer protection device. Background Technology

[0002] In industrial automation systems, silencers are typically installed at the valve body exhaust port to reduce exhaust noise and block impurities. However, existing silencers have the following drawbacks: 1. Insufficient backflow prevention: Traditional silencers lack redundant sealing design, allowing corrosive gases to easily flow back into the solenoid valve, intelligent valve positioner, cylinder, and other automated control equipment, causing corrosion, damage, and jamming of internal components, mechanical parts, and seals, resulting in the malfunction of critical automated control equipment such as valves and solenoid valves; 2. Lack of protection: The exposed exhaust port is susceptible to intrusion from foreign objects and corrosive substances in the external environment, making it prone to contamination. Furthermore, the sintered mesh at the exhaust port cannot be self-cleaned, leading to a large amount of impurities adhering to the sintered mesh and clogging the silencer, causing poor exhaust or complete failure to exhaust, thus impacting production. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a backflow prevention self-cleaning muffler protection device. It employs a double-valve core sealing structure to block the first and second air inlets, preventing gas backflow and reducing the possibility of equipment failure and damage. Simultaneously, a protective cover is installed at the exhaust port to protect it, preventing it from being exposed. Furthermore, the protective cover and the exhaust port form a self-cleaning space. Airflow impacts the protective cover, creating turbulent flow that washes away impurities adhering to the sintered mesh within this self-cleaning space, thus solving the problem of the sintered mesh being unable to self-clean due to attached impurities.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A backflow prevention self-cleaning muffler protection device includes a device body, characterized in that: the device body includes an outer shell and an inner shell, the inner shell is connected to the outer shell, the outer shell is connected to the exhaust port of a valve body, the outer shell is provided with a first air inlet, the inner shell is provided with a second air inlet, the first air inlet and the second air inlet are connected, a double-layer sealing structure is installed in the device body, the double-layer sealing structure is used to control the opening and closing of the first air inlet and the second air inlet, the inner shell is provided with an exhaust port, a sintered mesh is installed at the exhaust port, and a protective cover is installed at one end of the device body located at the exhaust port, forming a self-cleaning space between the protective cover and the exhaust port.

[0006] A dual-valve-core sealing structure is adopted to seal the first and second air inlets, preventing gas backflow and reducing the possibility of equipment failure and damage. At the same time, a protective cover is installed at the exhaust port to protect it from being exposed. The protective cover and the exhaust port form a self-cleaning space. The airflow impacts the protective cover, and turbulent flow is formed in the self-cleaning space to wash the sintered mesh, solving the problem of impurities adhering to the sintered mesh and being unable to self-clean.

[0007] Furthermore, the double-layer sealing structure includes a first valve core, a second valve core, and a first compression spring. The first valve core and the second valve core are connected by a first connecting rod. The first compression spring is sleeved on the first connecting rod, and its two ends are respectively connected to the first valve core and the first air inlet.

[0008] Furthermore, the double-layer sealing structure also includes a support member, which is installed inside the device body. The end of the support member is provided with an elastic connector, and the support member is connected to the first valve core through the elastic connector.

[0009] Furthermore, the first air inlet is provided with a first baffle block, the second air inlet is provided with a second baffle block, the first baffle block is provided with a first inclined portion corresponding to the first valve core, and the second baffle block is provided with a second inclined portion corresponding to the second valve core.

[0010] Furthermore, the protective cover is equipped with a guide channel to guide airflow, and a rubber ring is fixedly installed on the protective cover.

[0011] Furthermore, the protective cover is connected to the device body via threads, allowing for detachable installation.

[0012] Furthermore, the inner shell is provided with a pressure guide port, and a blockage alarm structure is installed in the pressure guide port. The blockage alarm structure is used to monitor whether the device body is blocked and issue a warning.

[0013] Furthermore, the blockage alarm structure includes a third valve core, a second compression spring, a second connecting rod, and an alarm color block. The third valve core abuts against the pressure guide port and is connected to the alarm color block via the second connecting rod. The second compression spring is sleeved on the second connecting rod, and a third baffle block is provided inside the pressure guide port. The two ends of the second compression spring are connected to the third valve core and the third baffle block, respectively, and the alarm color block abuts against the third baffle block.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention employs a dual-valve-core sealing structure to seal the first and second air inlets, preventing gas backflow and reducing the possibility of equipment malfunction and damage. Simultaneously, a protective cover is installed at the exhaust port to protect it, preventing it from being exposed. The protective cover and the exhaust port form a self-cleaning space. By utilizing airflow to impact the protective cover, turbulent flow is created in the self-cleaning space to wash away the sintered mesh, solving the problem of impurities adhering to the sintered mesh and preventing it from self-cleaning.

[0016] The inner shell of this utility model is provided with a pressure guide port, and a blockage alarm structure is installed in the pressure guide port. The blockage alarm structure is used to monitor whether the device body is blocked. The airflow is depressurized through the pressure guide port, and the airflow pushes the third valve core. The alarm color block determines whether the exhaust port is blocked, providing a visual blockage signal, replacing manual inspection, and making it easier to detect blockages. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a cross-sectional view of a backflow prevention self-cleaning muffler protection device according to the present invention;

[0019] Figure 2 This is a schematic diagram of the blockage alarm structure in this utility model.

[0020] In the diagram: 1-Device body; 2-Outer shell; 3-Inner shell; 4-First air inlet; 5-Second air inlet; 6-Exhaust port; 7-Sintered mesh; 8-Protective cover; 9-Self-cleaning space; 10-First valve core; 11-Second valve core; 12-First compression spring; 13-First connecting rod; 14-Support; 15-Elastic connector; 16-First baffle; 17-Second baffle; 18-First inclined part; 19-Second inclined part; 20-Guide groove; 21-Pressure guide port; 22-Blocking alarm structure; 23-Third valve core; 24-Second compression spring; 25-Second connecting rod; 26-Alarm color block; 27-Third baffle. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] like Figures 1 to 2As shown, this utility model discloses a backflow prevention self-cleaning muffler protection device, including a device body 1, a double-layer sealing structure, a blockage alarm structure 22, and a protective cover 8. The device body 1 includes an outer shell 2 and an inner shell 3. The inner shell 3 is connected inside the outer shell 2. The outer shell 2 is connected to the exhaust port of the valve body. The outer shell 2 has a first air inlet 4, and the inner shell 3 has a second air inlet 5. The first air inlet 4 and the second air inlet 5 are connected. The double-layer sealing structure is installed inside the device body 1 and is used to control the opening and closing of the first air inlet 4 and the second air inlet 5. The inner shell 3 has a pressure guide port 21, and the blockage alarm structure 22 is installed in the pressure guide port 21 to monitor whether the device body 1 is blocked. The inner shell 3 has an exhaust port 6, and a sintered mesh 7 is installed in the exhaust port 6. The protective cover 8 is installed at one end of the device body 1 located at the exhaust port 6, and a self-cleaning space 9 is formed between the protective cover 8 and the exhaust port 6.

[0023] Through the above-mentioned structural design, this silencer integrates intelligent monitoring, anti-backflow sealing, and self-cleaning structure. It is particularly suitable for exhaust ports of valve positioners and solenoid valves in high dust and highly corrosive working conditions, solving problems such as easy clogging, lack of status monitoring, insufficient external protection, and inconvenient maintenance of traditional silencers.

[0024] The double-layer sealing structure includes a first valve core 10, a second valve core 11, a first compression spring 12, a first connecting rod 13, and a support member 14. The first valve core 10 and the second valve core 11 are connected by the first connecting rod 13. The first compression spring 12 is sleeved on the first connecting rod 13, and its two ends are respectively connected to the first valve core 10 and the first air inlet 4. The support member 14 is installed inside the device body 1, and its end is provided with an elastic connector 15. The support member 14 is connected to the first valve core 10 through the elastic connector 15. The first valve core 10 seals the first air inlet 4, and the second valve core 11 seals the first air inlet 4. The valve core 11 blocks the second air inlet 5. When the valve body exhaust port is venting, the airflow pushes open the first valve core 10 and the second valve core 11, opening the first air inlet 4 and the second air inlet 5 to achieve exhaust. When the gas flows back, it impacts the first valve core 10 and the second valve core 11, closing the first air inlet 4 and the second air inlet 5 to prevent backflow. The double-layer sealing structure increases the reliability of the seal and reduces the possibility of equipment failure and damage. The support member 14 increases the stability of the first valve core 10, and the first valve core 10 is connected by the elastic connector 15, allowing the first valve core 10 to be pushed open.

[0025] A first baffle block 16 is fixedly installed at the first air inlet 4, and a second baffle block 17 is fixedly installed at the second air inlet 5. The first baffle block 16 and the first valve core 10 are respectively provided with matching first inclined portions 18, and the second baffle block 17 and the second valve core 11 are respectively provided with matching second inclined portions 19. By matching the first inclined portions 18 and the second inclined portions 19, the sealing effect between the first valve core 10 and the first air inlet 4, and between the second valve core 11 and the second air inlet 5 is increased.

[0026] Furthermore, in this invention, the inner surface of the muffler device body 1 and the valve core surface are coated with a graphene coating to reduce oil adhesion.

[0027] In this utility model, the protective cover 8 is connected to the device body 1 by a thread. Specifically, the outer shell 2 or the inner shell 3 may be provided with an external thread, and the protective cover 8 may be provided with an internal thread. The threaded connection is firm, reliable and easy to disassemble, reducing the use of unnecessary tools, and the protective position can be adjusted at any angle of 360° according to the protection needs.

[0028] A protective cover 8 is installed at the exhaust port 6 to protect the exhaust port 6 and prevent the exhaust port 6 from being exposed. At the same time, a self-cleaning space 9 is formed between the protective cover 8 and the exhaust port 6. The airflow impacts the protective cover 8, and turbulent flow is formed in the self-cleaning space 9 to wash the sintered mesh 7, which solves the problem of the sintered mesh 7 having no self-cleaning function due to the attachment of impurities, and realizes the self-cleaning of the muffler.

[0029] A guide channel 20 is provided on one side of the protective cover 8. After the airflow washes the sintering mesh 7, it self-cleans the dust, impurities and water droplets attached to the sintering mesh 7. Some water droplets fall onto the protective cover 8 and are guided and drained through the guide channel 20.

[0030] A rubber ring is fixedly installed on the side surface of the protective cover 8 near the exhaust port 6. The rubber ring protects the protective cover 8 and prevents damage when the airflow impacts the protective cover 8.

[0031] The blockage alarm structure 22 includes a third valve core 23, a second compression spring 24, a second connecting rod 25, and an alarm color block 26. The third valve core 23 abuts against the pressure guide port 21. The third valve core 23 is connected to the alarm color block 26 through the second connecting rod 25. The second compression spring 24 is sleeved on the second connecting rod 25. A third baffle block 27 is provided inside the pressure guide port 21. The two ends of the second compression spring 24 are respectively connected to the third valve core 23 and the third baffle block 27. The alarm color block 26 abuts against the third baffle block 27.

[0032] Specifically, when exhaust port 6 is blocked, the airflow will be pressurized through pressure guide port 21 to the third valve core 23. When the pressure exceeds the set limit pressure, such as 0.5 MPa, the air pressure pushes the third valve core 23, which compresses the second compression spring 24 and pushes the second connecting rod 25 to move outward. At the same time, it drives the alarm color block 26, so that the alarm color block 26 is exposed in the device body 1 to realize the alarm function. Whether the exhaust port 6 is blocked is determined by whether the alarm color block 26 is pushed out. Through the design of the blockage alarm structure 22, a visual blockage signal is provided for exhaust port 6, making it easier and more intuitive to detect blockage.

[0033] When the pressure inside the device body 1 decreases, the second compression spring 24 resets, forcing the second connecting rod 25, along with the alarm color block 26 and the third valve core 23, to reset and return to their original positions. The alarm color block 26 then retracts into the device body 1.

[0034] It is important to note that when the alarm color block 26 comes into contact with the third baffle block 27, a good seal must be ensured to prevent leakage and avoid pressure loss that could cause the alarm color block 26 to malfunction. At the same time, since the solenoid valve has a certain pressure under normal exhaust conditions, the second compression spring 24 needs to be compressed in its initial state so that it exerts an elastic force on the third valve core 23 to overcome the force under normal exhaust conditions and prevent the alarm color block 26 from being pushed out under normal force, which could lead to a false alarm.

[0035] The embodiments of this utility model are not limited thereto. Based on the above embodiments of this utility model, using conventional technical knowledge and common methods in the field, without departing from the basic technical idea of ​​this utility model and without conflict, the above preferred embodiments can be modified, replaced or combined in various other forms. All other embodiments obtained fall within the scope of protection of this utility model.

Claims

1. A backflow prevention self-cleaning muffler protection device, comprising a device body, characterized in that: The device body includes an outer shell and an inner shell, with the inner shell connected to the outer shell. The outer shell is connected to the exhaust port of the valve body. The outer shell has a first air inlet, and the inner shell has a second air inlet. The first air inlet and the second air inlet are in communication. A double-layer sealing structure is installed inside the device body to control the opening and closing of the first air inlet and the second air inlet. The inner shell has an exhaust port, and a sintered mesh is installed at the exhaust port. A protective cover is installed at one end of the device body located at the exhaust port, and a self-cleaning space is formed between the protective cover and the exhaust port.

2. The anti-backflow self-cleaning muffler protection device according to claim 1, characterized in that: The double-layer sealing structure includes a first valve core, a second valve core, and a first compression spring. The first valve core and the second valve core are connected by a first connecting rod. The first compression spring is sleeved on the first connecting rod, and its two ends are respectively connected to the first valve core and the first air inlet.

3. The anti-backflow self-cleaning muffler protection device according to claim 2, characterized in that: The double-layer sealing structure also includes a support member, which is installed in the device body. The end of the support member is provided with an elastic connector, and the support member is connected to the first valve core through the elastic connector.

4. The anti-backflow self-cleaning muffler protection device according to claim 2, characterized in that: The first air inlet is provided with a first baffle block, and the second air inlet is provided with a second baffle block. The first baffle block and the first valve core are provided with a first inclined portion, and the second baffle block and the second valve core are provided with a second inclined portion.

5. The anti-backflow self-cleaning muffler protection device according to claim 1, characterized in that: The protective cover is provided with a flow guide groove, which is used to guide airflow, and a rubber ring is fixedly installed on the protective cover.

6. The anti-backflow self-cleaning muffler protection device according to claim 1, characterized in that: The protective cover is connected to the device body by threads, allowing for detachable installation.

7. The anti-backflow self-cleaning muffler protection device according to claim 1, characterized in that: The inner housing is provided with a pressure guide port, and a blockage alarm structure is installed in the pressure guide port. The blockage alarm structure is used to monitor whether the device body is blocked and issue a warning.

8. The backflow prevention self-cleaning muffler protection device according to claim 7, characterized in that: The blockage alarm structure includes a third valve core, a second compression spring, a second connecting rod, and an alarm color block. The third valve core abuts against the pressure guide port and is connected to the alarm color block via the second connecting rod. The second compression spring is sleeved on the second connecting rod. A third flow-blocking block is provided inside the pressure guide port. The two ends of the second compression spring are respectively connected to the third valve core and the third flow-blocking block, and the alarm color block abuts against the third flow-blocking block.

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