Pneumatic valve with external solenoid

Abstract

This utility model relates to a pneumatic valve with an external solenoid valve, comprising a chamber pump body, a conveying pipe connected to the chamber pump body, a diaphragm, an upper cover, a solenoid valve, and a control system. The diaphragm is funnel-shaped, and the upper cover presses both ends of the diaphragm against the upper part of the chamber pump body via sealing gaskets, forming an air chamber. A spring is located at the center between the diaphragm and the bottom inner wall of the upper cover. The solenoid valve is a two-position four-way solenoid valve, located on the upper part of the upper cover. An air inlet is also provided on the upper cover. The first port of the two-position four-way solenoid valve is connected to the air inlet pipe, the second port is connected to the exhaust pipe, and the third port is connected to the air outlet pipe. The other end of the air outlet pipe is connected to the air inlet of the upper cover. The two-position four-way solenoid valve is electrically connected to the control system. Its advantages are: simple structure, flexible control, safety and reliability, short response time, and good sealing performance.

Description

Technical Field

[0001] This utility model belongs to the field of pneumatic valve technology, specifically relating to a pneumatic valve with an external solenoid valve. Background Technology

[0002] Currently, in industrial dust collection systems, silo pumps are crucial equipment for pneumatic dust conveying, used to transport dust collected by dust collectors to remote dust collection devices. The control pipeline of a silo pump typically uses a pilot-operated solenoid valve. This valve has a pilot port and an exhaust port. The pilot port is connected to the air inlet at the front of the valve, and the exhaust port is connected to the air outlet at the rear of the valve. When energized, the electromagnetic force opens the exhaust port, causing a rapid drop in pressure in the upper chamber, creating a pressure differential around the diaphragm. The pressure of the medium at the valve inlet pushes the diaphragm upward, opening the valve. When de-energized, the electromagnet's core resets, closing the exhaust port. Compressed air then rapidly creates a pressure differential around the diaphragm in the chamber through the pilot port, pushing the diaphragm downward and closing the valve. Compressed air then enters the silo pump, transporting the dust inside through the pipeline.

[0003] In daily use, it was found that low compressed air pressure can cause blockage in the ash conveying pipeline, leading to material backflow into the silo pump. In this case, the backflowing dust will enter the solenoid valve through its exhaust port, causing the solenoid valve to not close properly and the silo pump to malfunction. Simultaneously, the high-pressure air source can damage the diaphragm inside the solenoid valve, rendering it unusable and increasing spare parts costs. Therefore, a reliable valve that meets the requirements of on-site operation is needed. Utility Model Content

[0004] The purpose of this utility model patent is to provide a safe, reliable, low-failure-rate, and simple external solenoid valve pneumatic valve that can meet the needs of on-site dust conveying, save spare parts costs, and increase the economic benefits of enterprises.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pneumatic valve with an external solenoid valve includes a chamber pump body, an ash conveying pipe connected to the chamber pump body, a diaphragm, an upper end cover, a solenoid valve, and a control system. The diaphragm is funnel-shaped, and the upper end cover presses both ends of the diaphragm against the upper part of the chamber pump body via sealing gaskets to form an air chamber. Bolt holes are provided at the bottom of the diaphragm, and iron gaskets are provided at the top and bottom of the diaphragm, respectively, and are fixedly connected by bolts. A spring is provided at the center between the diaphragm and the bottom inner wall of the upper end cover, with the upper end of the spring fixedly connected to the bottom inner wall of the upper end cover and the lower end fixed to the iron gasket.

[0007] The solenoid valve is a two-position four-way solenoid valve, which is mounted on the upper part of the upper end cover by a fixed bracket. An air inlet is also opened on the upper end cover. The first interface of the two-position four-way solenoid valve is connected to the air inlet pipe, the second interface of the two-position four-way solenoid valve is connected to the exhaust pipe, and the third interface of the two-position four-way solenoid valve is connected to the air outlet pipe. The other end of the air outlet pipe is connected to the air inlet of the upper end cover. The two-position four-way solenoid valve is electrically connected to the control system.

[0008] As a further description of the above technical solution: the diaphragm is a diaphragm made of rubber.

[0009] As a further description of the above technical solution: a threaded opening is provided at the air inlet of the upper end cover, a connector nut is installed, and the other end of the air outlet pipe is threadedly connected to the air inlet of the upper end cover.

[0010] Compared with existing technologies, it has the following advantages:

[0011] This utility model, through the coordinated design of an external solenoid valve, diaphragm, and control system, not only enables precise pressure relief control according to a preset time, but also features a simple structure, flexible control, safety and reliability, short response time, and good sealing performance. It also has a one-way check function, which can prevent dust backflow, save spare parts costs, and increase the economic benefits of enterprises. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0013] 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.

[0014] like Figure 1As shown, this utility model discloses an external solenoid valve pneumatic valve, comprising a chamber pump body 1, an ash conveying pipe connected to the chamber pump body 1, a diaphragm 3, an upper end cover, a solenoid valve, and a control system. The diaphragm 3 is funnel-shaped, and the upper end cover presses both ends of the diaphragm against the upper part of the chamber pump body 1 via a sealing gasket 2, forming an air chamber. The diaphragm 3 is made of rubber, with bolt holes at its bottom. Iron gaskets 13 are respectively provided at the top and bottom of the diaphragm 3 and fixedly connected by bolts 14, thereby enhancing impact resistance. A spring 12 is provided at the center between the diaphragm and the bottom inner wall of the upper end cover 4, with its upper end fixedly connected to the bottom inner wall of the upper end cover 4 and its lower end fixed to the iron gasket 13.

[0015] The solenoid valve is a two-position four-way solenoid valve 8, which is mounted on the upper part of the upper end cover 4 via a fixed bracket 6. An air inlet 11 is also provided on the upper end cover 4. The first port of the two-position four-way solenoid valve 8 is connected to the air inlet pipe 9, the second port of the two-position four-way solenoid valve is connected to the exhaust pipe 10, and the third port of the two-position four-way solenoid valve is connected to the air outlet pipe 7. The other end of the air outlet pipe 7 is connected to the air inlet 11 of the upper end cover 4. The two-position four-way solenoid valve 8 is electrically connected to the control system.

[0016] As a further description of the above technical solution: the diaphragm 3 is a diaphragm made of rubber.

[0017] As a further description of the above technical solution: a threaded opening is provided at the air inlet 11 of the upper end cover 4, and a connector nut 5 is installed thereon. The other end of the air outlet pipe 7 is threadedly connected to the air inlet 11 of the upper end cover 4.

[0018] Working Principle: This utility model utilizes an external two-position four-way solenoid valve to achieve air intake and exhaust functions, thus realizing the opening and closing of a pneumatic valve. In use, the intake pipe contains compressed air, from which the air source is obtained. The exhaust port is connected to a thin flexible tube, the other end of which is directly exposed to the air, allowing exhaust gas to be directly discharged. When the two-position four-way solenoid valve is not energized, compressed air enters the cavity of the pneumatic valve through the solenoid valve's outlet. Under the combined action of the spring, a pressure difference is formed around the diaphragm, pushing the diaphragm downwards and closing the valve at its bottom. When energized, the solenoid valve's outlet closes, and the exhaust port opens. The gas in the pneumatic valve cavity is discharged through the solenoid valve's exhaust port, causing the pressure in the upper chamber to drop rapidly. This creates a pressure difference around the diaphragm, with the lower pressure above and higher pressure below. The fluid pressure at the pipe inlet pushes the diaphragm upwards, opening the valve. Because the exhaust port of the two-position four-way solenoid valve is separate from the pneumatic valve's outlet pipe, dust backflow is avoided, significantly improving safety and reliability. Meanwhile, the air pipe diameter of the two-position four-way solenoid valve is larger than that of the original pilot-operated solenoid valve's inlet and outlet channels, which can shorten the pneumatic valve's response time and improve work efficiency.

Claims

1. A pneumatic valve with an external solenoid valve, comprising a silo pump body, a conveying pipe connected to the silo pump body, a diaphragm, an upper end cover, a solenoid valve, and a control system, characterized in that, The diaphragm is funnel-shaped, and the upper end cover presses both ends of the diaphragm tightly against the upper part of the chamber pump body through a sealing gasket to form an air chamber; bolt holes are opened at the bottom of the diaphragm, and iron gaskets are provided at the top and bottom of the bottom of the diaphragm and are fixedly connected by bolts; a spring is provided at the center position between the diaphragm and the bottom inner wall of the upper end cover, the upper end of the spring is fixedly connected to the bottom inner wall of the upper end cover, and the lower end is fixed to the iron gasket; The solenoid valve is a two-position four-way solenoid valve, which is mounted on the upper part of the upper end cover by a fixed bracket. An air inlet is also opened on the upper end cover. The first interface of the two-position four-way solenoid valve is connected to the air inlet pipe, the second interface of the two-position four-way solenoid valve is connected to the exhaust pipe, and the third interface of the two-position four-way solenoid valve is connected to the air outlet pipe. The other end of the air outlet pipe is connected to the air inlet of the upper end cover. The two-position four-way solenoid valve is electrically connected to the control system.

2. The pneumatic valve with an external solenoid valve according to claim 1, characterized in that: The diaphragm is made of rubber.

3. The pneumatic valve with an external solenoid valve according to claim 1, characterized in that: A threaded opening is provided at the air inlet of the upper cover, and a connector nut is installed thereon. The other end of the air outlet pipe is threadedly connected to the air inlet of the upper cover.

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