Multi-suction-port exhaust system with electromagnetic valve

Abstract

The invention discloses a multi-suction-port exhaust system with an electromagnetic valve. The multi-suction-port exhaust system comprises a dust hood, an exhaust fan, the electromagnetic valve, a rear flexible connector, an exhaust treatment device, a hard connector and a front flexible connector. By utilizing the tightness of the electromagnetic valve when the electromagnetic valve is closed, the problem that pollutants discharged by a working area where air exhaust is started are diffused to other working areas where air exhaust is not started due to the fact that the check valve used at present is not closed tightly is solved. Meanwhile, in the exhaust operation process, the electromagnetic valve is always in an open state, and the situation that a valve element needs to be jacked open through the impact force of exhaust air flow from beginning to end to achieve normal flowing of the exhaust air flow like an existing one-way valve is not needed; the device has an energy-saving effect. Moreover, the electromagnetic valve belongs to a quick-opening valve, so that the electromagnetic valve is convenient and flexible to operate in the opening or closing process.

Description

Technical Field

[0001] This invention belongs to the field of ventilation technology, specifically relating to a multi-inlet exhaust system with solenoid valves that allows multiple work areas to share a single exhaust system without affecting each other. Background Technology

[0002] In people's daily life and production processes, exhaust systems are usually installed in work areas that generate dust, smoke, and toxic and harmful gaseous pollutants to remove these pollutants in a timely manner, in order to protect the health of workers and ensure the safe operation of equipment and facilities.

[0003] In current exhaust systems, one-way valves installed after the exhaust fan to prevent backflow of exhaust air are mainly of the following types: suspended one-way valves, spring-loaded one-way valves, and fan-shaped one-way valves. During exhaust, the impact force of the flowing air is required to open these one-way valves. This necessitates a continuous consumption of the flowing air's energy, causing the exhaust fan to provide more energy to operate normally, resulting in energy waste. Furthermore, these one-way valves do not close tightly.

[0004] For multi-intake exhaust systems, if the one-way valves do not close tightly, pollutants emitted from work areas with activated exhaust can spread through the main exhaust duct to other work areas without activated exhaust. This causes environmental pollution in these non-activated work areas, affecting the health of workers and the safe operation of equipment.

[0005] To address the aforementioned issues, it is necessary to improve the existing exhaust system and propose a multi-inlet exhaust system with a solenoid valve. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a multi-inlet exhaust system with an electromagnetic valve. In this system, a rigid joint with high rigidity connects the electromagnetic valve and the exhaust fan, making them a rigid unit. Flexible joints connect this rigid unit to each exhaust branch pipe. This system prevents pollutants emitted from one work area from spreading to other work areas, while also offering convenient, flexible, and energy-saving operation.

[0007] To achieve the above objectives, the present invention adopts the following technical solution.

[0008] The multi-intake exhaust system with solenoid valves includes a dust hood, an exhaust fan, a solenoid valve, an exhaust treatment device, a rigid connector, and a flexible connector. The flexible connectors include a front flexible connector and a rear flexible connector. Each work area that generates dust, fumes, and toxic or harmful gaseous pollutants is equipped with an exhaust branch duct. When a work area is in operation, the exhaust fan in that branch duct starts, and the solenoid valve opens, allowing the generated pollutants to pass sequentially through the dust hood, front flexible connector, exhaust fan, rigid connector, solenoid valve, and rear flexible connector within the branch duct, before entering the main exhaust duct and being treated by the exhaust treatment device before being discharged.

[0009] The aforementioned dust collection hood creates a negative pressure zone inside the hood due to the suction of the exhaust fan. Dust, fumes, and toxic or harmful gaseous pollutants generated during work in the work area flow towards the dust collection hood under this negative pressure.

[0010] The dust hood collects these pollutants, which are then drawn in by the exhaust fan and sent to the exhaust treatment unit for processing before being discharged. This maintains a good working environment in the work area, ensuring the health of relevant personnel and the safe operation of equipment and facilities.

[0011] The solenoid valve operates as follows: When the coil is energized, the valve core is subjected to electromagnetic force, compressing the spring and separating the valve core from the valve seat, thus opening the flow channel within the valve. When the coil is de-energized, the valve core is no longer subjected to electromagnetic force, and under the force of the spring, it pushes against the valve seat, blocking the flow channel and closing the solenoid valve. The solenoid valve is a quick-opening valve; it opens when the coil is energized and closes when the coil is de-energized, making its operation simple.

[0012] Solenoid valves are designed to close tightly, preventing dust, smoke, and toxic or harmful gaseous pollutants generated in each work area from spreading to other work areas.

[0013] During the exhaust process, although the coil of the solenoid valve is energized, the current is very small, and the energy consumed is negligible. Furthermore, since the solenoid valve is always open, it does not require the impact force of the flowing gas to open it. Therefore, the solenoid valve does not consume the energy of the flowing gas to open the valve, thus achieving the effect of energy saving in the system.

[0014] The rigid joint, with its high rigidity, connects the solenoid valve and the exhaust fan into a rigid whole. During the operation of the exhaust system, the airflow delivered by the exhaust fan is fast and highly turbulent, possessing a strong scouring ability. Even after passing through the short rigid joint, this airflow still retains a strong scouring ability, preventing dust, smoke, and toxic or harmful gaseous pollutants from remaining or accumulating inside the solenoid valve, ensuring that the inside of the solenoid valve is always kept clean.

[0015] Because the inside of the solenoid valve is always kept clean, problems such as incomplete closure and jamming during its opening or closing are avoided, ensuring the convenience and flexibility of solenoid valve operation.

[0016] The flexible joint includes a front flexible joint and a rear flexible joint. The rigid joint connects the solenoid valve and the exhaust fan into a rigid whole, and the flexible joint connects this rigid whole into the exhaust branch pipe.

[0017] Flexible joints possess excellent flexibility, enabling them to absorb vibration. When the exhaust fan of a branch duct is running, they prevent the fan's vibration from being transmitted to the dust hood, main exhaust duct, other branch ducts, and other equipment. This avoids accidents such as pipe ruptures, breaks, and equipment damage caused by vibration transmitted from the exhaust fan, ensuring the safe operation of the entire exhaust system and extending its service life.

[0018] This exhaust system, due to the tight sealing performance of the solenoid valve when closed, prevents pollutants emitted from one work area from spreading to other work areas; the inside of the solenoid valve is always kept clean, preventing problems such as jamming and incomplete closure during operation; during operation, the solenoid valve is in the open state, eliminating the need for the impact force of the exhaust airflow to open the valve core as with current one-way valves, thus achieving energy-saving effects.

[0019] Other advantages, objectives and features of the present invention will be set forth in the following description. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the multi-inlet exhaust system with electromagnetic valves invented.

[0021] Figure 2 This is a partial structural diagram of the multi-inlet exhaust system with electromagnetic valves invented.

[0022] Explanation of reference numerals in the attached figures: 1-Dust hood; 2-Exhaust fan; 3-Solenoid valve; 4-Rear flexible connector; 5-Exhaust treatment device; 6-Exhaust main pipe; 7-Exhaust branch pipe; 8-Rigid connector; 9-Front flexible connector; 31-Solenoid valve inlet; 32-Valve body; 33-Spring; 34-Coil; 35-Solenoid valve outlet; 36-Valve seat; 37-Valve core; 38-Valve internal flow channel. Detailed Implementation

[0023] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These preferred embodiments are merely illustrative and not intended to limit the scope of protection of the invention.

[0024] See the example. Figure 1The multi-intake exhaust system with solenoid valves includes a dust hood 1, an exhaust fan 2, a solenoid valve 3, an exhaust treatment device 5, a rear flexible connector 4, a rigid connector 8, and a front flexible connector 9. The dust hood 1 collects dust, fumes, and toxic / harmful gaseous pollutants generated during work. Using the suction of the exhaust fan 2, these pollutants are transported through exhaust branch pipes 7 and the main exhaust pipe 6 to the exhaust treatment device 5 for treatment before being discharged. This maintains a good working environment in the work area, ensuring the health of relevant personnel and the safe operation of equipment and facilities.

[0025] Specifically, each work area is equipped with an exhaust branch pipe 7 to collect dust, smoke, and toxic and harmful gaseous pollutants generated during work. When a work area is in operation, the exhaust fan 2 of the exhaust branch pipe 7 is started, and the solenoid valve 3 is opened, allowing the generated pollutants to pass sequentially through the dust collection hood 1, the front flexible connector 9, the exhaust fan 2, the rigid connector 8, the solenoid valve 3, and the rear flexible connector 4 in the exhaust branch pipe 7, and then into the main exhaust pipe 6, where they are sent to the exhaust treatment device 5 for treatment before being discharged.

[0026] In this embodiment, the dust hood 1 forms a negative pressure in its internal area under the suction action of the exhaust fan 2. Driven by this negative pressure, dust, smoke, and toxic and harmful gaseous pollutants generated during operation flow into the dust hood 1.

[0027] Since all pollutants flowed into the dust collection hood 1, the work area maintained a good working environment, ensuring the health of relevant staff and the safe operation of equipment and facilities.

[0028] In this embodiment, the solenoid valve 3 is a quick-opening valve; it opens when the coil 34 is energized and closes when the coil 34 is de-energized. Opening and closing the solenoid valve 3 is simple to operate.

[0029] During operation, when the coil 34 is energized, the valve core 37 is subjected to electromagnetic force, compressing the spring 33, separating the valve core 37 from the valve seat 36, unblocking the flow channel 38 inside the valve, and opening the solenoid valve 3; when the coil 34 is de-energized, the valve core 37 is no longer subjected to electromagnetic force, and under the force of the spring 33, the valve core 37 is pushed towards the valve seat 36, blocking the flow channel 38 inside the valve, and closing the solenoid valve 3.

[0030] Solenoid valve 3 has a tight shut-off function, preventing dust, smoke, and toxic or harmful gaseous pollutants generated when the exhaust ventilation is activated in the work area from spreading to other work areas where the exhaust ventilation is not activated through the main exhaust pipe 6. This maintains a good working environment in the work area, ensuring the health of relevant personnel and the safe operation of equipment and facilities.

[0031] During the exhaust process, solenoid valve 3 remains open, eliminating the need for the impact force of the flowing gas to open it. This eliminates the need to consume the energy of the flowing gas, thus achieving energy savings for the exhaust system.

[0032] In this embodiment, a rigid connector 8 with high rigidity is used to connect the solenoid valve 3 and the exhaust fan 2 into a rigid whole. The rigid connector 8 is 60 mm to 120 mm in length, and the airflow delivered by the exhaust fan 2 still has a strong scouring ability on the solenoid valve 3. This prevents dust, smoke, and toxic and harmful gaseous pollutants from staying or accumulating inside the solenoid valve 3, ensuring that the inside of the solenoid valve 3 is always in a clean state.

[0033] Because the inside is always kept clean, the operation of solenoid valve 3 is free from jamming and incomplete closure during opening or closing, ensuring the convenience and flexibility of operating solenoid valve 3.

[0034] In this embodiment, a rigid connector 8 connects the solenoid valve 3 and the exhaust fan 2 into a rigid whole, and then a flexible connector is used to connect this rigid whole to the exhaust branch pipe 7. The flexible connector includes a front flexible connector 9 and a rear flexible connector 4.

[0035] Flexible joints possess excellent flexibility, enabling them to absorb vibration. When the exhaust fan 2 of a branch duct 7 is running, they prevent the vibration generated by the exhaust fan 2 from being transmitted to the dust hood 1, the main exhaust duct 6, other branch ducts 7, and other equipment. This avoids accidents such as pipe breakage, pipe rupture, and equipment damage caused by vibration, ensuring the safe operation of the entire exhaust system.

[0036] In this embodiment, before work begins in a certain work area, the exhaust fan 2 is started first, followed by the opening of the solenoid valve 3. This prevents exhaust air from other areas from flowing back into this area and causing environmental pollution. When work in this area stops, the exhaust fan 2 removes all pollutants generated during the process, and then clean air is used to purge the area for 2 to 4 minutes before the solenoid valve 3 is closed and the exhaust fan 2 is stopped. This ensures that the solenoid valve 3 remains clean after it stops operating, thereby extending its service life.

[0037] This exhaust system utilizes the tight sealing performance of solenoid valve 3 when closed, solving the problem of pollutants emitted from the work area with exhaust activated spreading to other work areas without exhaust activated via the exhaust manifold 6 due to the incomplete sealing of currently used one-way valves. Simultaneously, during the operation of the exhaust system, solenoid valve 3 remains open at all times, unlike currently used one-way valves which require the impact force of the exhaust airflow to open the valve core 37 to achieve normal airflow; this exhaust system also offers energy-saving benefits.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should all be covered within the scope of the claims of the present invention.

Claims

1. A multi-inlet exhaust system with a solenoid valve, comprising a dust hood (1), an exhaust fan (2), a solenoid valve (3), a rear flexible connector (4), an exhaust treatment device (5), a rigid connector (8), and a front flexible connector (9); characterized in that: By utilizing the tightness of the solenoid valve (3) when closed, the problem of pollutants emitted from the work area that has started exhaust ventilation being diffused to other work areas that have not started exhaust ventilation through the exhaust manifold (6) is solved because the current one-way valve is not tight when closed. At the same time, the solenoid valve (3) is always open during the operation of the exhaust system, unlike the current one-way valve, which requires the impact force of the exhaust airflow to open the valve core (37) from beginning to end in order to achieve normal flow of exhaust airflow.

2. The multi-inlet exhaust system with a solenoid valve according to claim 1, characterized in that: The solenoid valve (3) is a quick-opening valve. When the coil (34) is energized, the valve core (37) is subjected to electromagnetic force, compressing the spring (33), separating the valve core (37) from the valve seat (36), and the flow channel (38) inside the valve is unobstructed, so the solenoid valve (3) opens. When the coil (34) is de-energized, the valve core (37) is no longer subjected to electromagnetic force. Under the force of the spring (33), the valve core (37) is pushed towards the valve seat (36), blocking the flow channel (38) inside the valve, and the solenoid valve (3) closes. The opening or closing of the solenoid valve (3) is simple to operate.

3. The multi-inlet exhaust system with a solenoid valve according to claim 1, characterized in that: The solenoid valve (3) has a tight shut-off function, which can prevent dust, smoke and toxic and harmful gas pollutants generated when the exhaust ventilation is activated from spreading to other work areas that have not activated the exhaust ventilation through the exhaust main pipe (6); it maintains a good working environment in the work area and ensures the health of relevant personnel and the safe operation of equipment and facilities.

4. A multi-inlet exhaust system with a solenoid valve according to claim 1, characterized in that: During the exhaust process, the solenoid valve (3) is always in the open state, and it does not need to be opened by the impact force of the flowing gas; therefore, it does not need to consume this part of the energy of the flowing gas, thus achieving the energy-saving effect of the exhaust system.

5. A multi-inlet exhaust system with a solenoid valve according to claim 1, characterized in that: A rigid connector (8) with high rigidity is used to connect the solenoid valve (3) and the exhaust fan (2) into a rigid whole; the length of the rigid connector (8) is 60 mm to 120 mm, and the airflow sent out by the exhaust fan (2) still has a strong scouring ability on the solenoid valve (3); it can prevent dust, smoke, and toxic and harmful gas pollutants from staying or depositing inside the solenoid valve (3), and ensure that the inside of the solenoid valve (3) is always clean.

6. A multi-inlet exhaust system with a solenoid valve according to claim 4, characterized in that: Since the inside is always kept clean, the operation of the solenoid valve (3) is not blocked or not tightly closed during the opening or closing process, thus ensuring the convenience and flexibility of the operation of the solenoid valve (3).

7. A multi-inlet exhaust system with a solenoid valve according to claim 1, characterized in that: The rigid joint (8) connects the solenoid valve (3) and the exhaust fan 2 into a rigid whole, and then the flexible joint connects this rigid whole to the exhaust branch pipe (7); when the exhaust fan (2) of a certain exhaust branch pipe (7) is running, the flexible joint has excellent flexibility and can absorb vibration; it can prevent the vibration generated by the exhaust fan (2) from being transmitted to the dust hood (1), the exhaust main pipe (6), other exhaust branch pipes (7) and other equipment.

8. A multi-inlet exhaust system with a solenoid valve according to claim 1, characterized in that: Before starting work in a certain work area, start the exhaust fan (2) and then open the solenoid valve (3) to prevent exhaust air from other areas from flowing back into this area and causing environmental pollution. When the work area stops working, after the exhaust fan (2) has removed all pollutants, clean air is used to blow clean air for 2 to 4 minutes before closing the solenoid valve (3) and stopping the exhaust fan (2). Ensure that the solenoid valve (3) is also in a clean state after it stops running, so as to extend the service life of the solenoid valve (3).

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