阅读说明：本技术 一种抽真空系统的控制机构 (Control mechanism of vacuum pumping system ) 是由 王立新 肖小万 于 2021-01-22 设计创作，主要内容包括：一种抽真空系统的控制机构,包括流量调节阀、多通电磁阀、第一管路、第二管路、第三管路,所述流量调节阀用于安装在抽真空系统的机头上,且流量调节阀的下游端与抽真空系统的机头进气口连通,所述第一管路的一端与多通电磁阀的A端口相连,另一端与流量调节阀的控制机构相连,所述第二管路的一端与多通电磁阀的B端口相连,另一端用于与抽真空系统的机头进气口相连,所述第三管路的一端与多通电磁阀的C端口相连,另一端用于与抽真空系统配套的油气分离罐的分离芯内空相连。本发明结构简单、运行成本低,可有效避免异物进入控制机构,保证配套的抽真空系统长时间正常作业。(The utility model provides a control mechanism of evacuation system, includes flow control valve, the solenoid valve that leads to more, first pipeline, second pipeline, third pipeline, flow control valve is used for installing on evacuation system's aircraft nose, and flow control valve's low reaches end and evacuation system's aircraft nose air inlet intercommunication, the one end of first pipeline links to each other with the A port of the solenoid valve that leads to more, and the other end links to each other with control mechanism of flow control valve, the one end of second pipeline links to each other with the B port of the solenoid valve that leads to more, and the other end is used for linking to each other with evacuation system's aircraft nose air inlet, the one end of third pipeline links to each other with the C port of the solenoid valve that leads to more, and the other end is used for linking to each other with the hollow. The invention has simple structure and low operation cost, can effectively prevent foreign matters from entering the control mechanism and ensures the long-time normal operation of the matched vacuum-pumping system.)

1. A control mechanism of a vacuum pumping system is characterized in that: comprises a flow regulating valve (5), a multi-way electromagnetic valve (6), a first pipeline (1), a second pipeline (2) and a third pipeline (3),

the flow regulating valve (5) is used for being arranged on the machine head of the vacuum-pumping system, the downstream end of the flow regulating valve (5) is communicated with the air inlet of the machine head of the vacuum-pumping system,

one end of the first pipeline (1) is connected with the A port of the multi-way electromagnetic valve (6), the other end is connected with the control mechanism of the flow regulating valve (5),

one end of the second pipeline (2) is connected with the port B of the multi-way electromagnetic valve (6), the other end is used for being connected with the air inlet of the machine head of the vacuum-pumping system,

one end of the third pipeline (3) is connected with the port C of the multi-way electromagnetic valve (6), and the other end of the third pipeline is connected with a separation core of an oil-gas separation tank matched with the vacuum-pumping system in a hollow mode.

2. The control mechanism of the vacuum pumping system according to claim 1, wherein: the flow regulating valve (5) is a pneumatic regulating valve.

3. The control mechanism of the vacuum pumping system according to claim 1, wherein: the multi-way electromagnetic valve (6) is a three-way electromagnetic valve.

4. The control mechanism of the vacuum pumping system according to claim 1, wherein: the flow control valve is characterized by further comprising a fourth pipeline (4), one end of the fourth pipeline (4) is connected with the second pipeline (2), the other end of the fourth pipeline is connected with the upstream end of the flow control valve (5), and a one-way valve (7) is arranged on the fourth pipeline (4).

Technical Field

The invention relates to the field of vacuum equipment, in particular to a control mechanism of a vacuum pumping system.

Background

The vacuum pumping system is widely applied to various industries and used for vacuumizing a vacuum pumping target source to form negative pressure.

As shown in CN201920639288.5, the machine head of the vacuum pumping system is connected with an air inlet through a normally closed air inlet valve, and the air inlet is used for pumping air to a target source to form negative pressure. And a control cylinder of the normally closed air inlet valve is connected with the atmospheric pressure through a normally open electromagnetic valve. When the normally open electromagnetic valve is closed, the air pressure in the control cylinder is reduced, a valve plate of the normally closed air inlet valve is separated from a valve seat of the normally closed air inlet valve, the air inlet is opened, the target source is connected with the machine head, and the air is pumped to the target source to form negative pressure; when the normally open electromagnetic valve is in an open state, the air pressure in the air cylinder is controlled to be atmospheric pressure, the valve plate of the normally closed air inlet valve is movably pressed on the valve seat of the normally closed air inlet valve, the air inlet is closed, and the connection between the target source and the machine head is disconnected.

However, in the control mechanism for matching the vacuum pumping system, the normally closed air inlet valve is connected with the atmosphere through the normally open electromagnetic valve, and even if a filter is arranged, the risk that foreign matters such as dust and water vapor enter the normally closed air inlet valve still occurs, so that the service life of the vacuum pumping system is difficult to ensure.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a control mechanism of a vacuum-pumping system, which has a simple structure and low operation cost, can effectively prevent foreign matters from entering the control mechanism, and ensures long-time normal operation of the matched vacuum-pumping system.

The technical scheme of the invention is as follows: the utility model provides a control mechanism of evacuation system, includes flow control valve, the solenoid valve that leads to more, first pipeline, second pipeline, third pipeline, flow control valve is used for installing on evacuation system's aircraft nose, and flow control valve's low reaches end and evacuation system's aircraft nose air inlet intercommunication, the one end of first pipeline links to each other with the A port of the solenoid valve that leads to more, and the other end links to each other with control mechanism of flow control valve, the one end of second pipeline links to each other with the B port of the solenoid valve that leads to more, and the other end is used for linking to each other with evacuation system's aircraft nose air inlet, the one end of third pipeline links to each other with the C port of the solenoid valve that leads to more, and the other end is used for linking to each other with the hollow.

The flow regulating valve is a pneumatic regulating valve,

the multi-way electromagnetic valve is a three-way electromagnetic valve.

The flow control valve is characterized by further comprising a fourth pipeline, one end of the fourth pipeline is connected with the second pipeline, the other end of the fourth pipeline is connected with the upstream end of the flow control valve, and a one-way valve is arranged on the fourth pipeline.

Adopt above-mentioned technical scheme to have following beneficial effect:

1. the control mechanism of the vacuum pumping system comprises a flow regulating valve, a multi-way electromagnetic valve, a first pipeline, a second pipeline and a third pipeline. The flow control valve is used for being installed on a machine head of the vacuumizing system, the downstream end of the flow control valve is communicated with a machine head air inlet of the vacuumizing system, namely, the machine head of the vacuumizing system is used for being connected with a vacuumizing target source through the flow control valve, and the purpose of forming negative pressure for linear vacuumizing of the vacuumizing target source is achieved by controlling the opening degree (from zero to full opening) of the flow control valve. One end of the first pipeline is connected with the port A of the multi-way electromagnetic valve, the other end of the first pipeline is connected with the control mechanism of the flow regulating valve, and the purpose of controlling the opening degree of the flow regulating valve is achieved by utilizing the pressure difference of the control mechanism of the flow regulating valve controlled by the first pipeline. One end of the second pipeline is connected with a port B of the multi-way electromagnetic valve, the other end of the second pipeline is used for being connected with a machine head air inlet of the vacuumizing system, namely, the port B of the multi-way electromagnetic valve is communicated with the position of the machine head air inlet through the second pipeline and is in a negative pressure state. One end of the third pipeline is connected with a C port of the multi-way electromagnetic valve, the other end of the third pipeline is used for being connected with the inside of a separation core of the oil-gas separation tank matched with the vacuum-pumping system, namely, the C port of the multi-way electromagnetic valve is connected with the inside of the separation core of the oil-gas separation tank through the third pipeline, is in an atmospheric pressure state and does not have the risk of dust pollution. When the matched vacuumizing system is in a standby state and does not need to vacuumize a vacuumizing target source, controlling the communication of a port B and a port C of a multi-way electromagnetic valve to ensure that a machine head air inlet of the vacuumizing system is communicated with the inside of a separating core of an oil-gas separating tank, keeping the pressure of a control mechanism of a flow regulating valve unchanged and keeping a closed state, circulating air flow between the machine head of the vacuumizing system and the oil-gas separating tank, and ensuring that the load of the vacuumizing system is smaller; when the vacuumizing target source needs to be vacuumized to form negative pressure, the port A and the port B of the multi-way electromagnetic valve are controlled to be communicated, the port A and the port B have pressure difference, the control mechanism of the flow regulating valve forms driving force, the flow regulating valve is driven to be opened, the purpose that the vacuumizing system head is controlled to vacuumize the vacuumizing target source to form the negative pressure is achieved, the connecting opening degree between the port A and the port B of the multi-way electromagnetic valve can be controlled, the opening degree of the flow regulating valve is controlled, the purpose that the vacuum degree of the vacuumizing target source is linearly controlled is achieved, and the actual requirements of enterprises can be effectively met.

2. The vacuum pumping system is characterized by further comprising a fourth pipeline, one end of the fourth pipeline is connected with the second pipeline, the other end of the fourth pipeline is connected with the upstream end of the flow regulating valve, a one-way valve is arranged on the fourth pipeline, when the multi-way electromagnetic valve breaks down, the machine head of the vacuum pumping system is overloaded and exceeds a threshold value, the one-way valve is opened, the machine head of the vacuum pumping system directly vacuumizes the vacuum pumping target source through the fourth pipeline to form negative pressure, the machine head of the vacuum pumping system is prevented from being overloaded, and normal operation of the machine head of the vacuum pumping system can be effectively guaranteed.

The following further description is made with reference to the accompanying drawings and detailed description.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the present invention in conjunction with a vacuum pumping system.

In the attached drawings, 1 is a first pipeline, 2 is a second pipeline, 3 is a third pipeline, 4 is a fourth pipeline, 5 is a flow regulating valve, 6 is a multi-way electromagnetic valve, and 7 is a one-way valve.

Detailed Description

Referring to fig. 1 and 2, an embodiment of a control mechanism of a vacuum pumping system is shown. The control mechanism of the vacuum pumping system comprises a flow regulating valve 5, a multi-way electromagnetic valve 6, a first pipeline 1, a second pipeline 2 and a third pipeline 3, wherein the flow regulating valve 5 is a pneumatic regulating valve, and the multi-way electromagnetic valve is a three-way electromagnetic valve. The flow control valve 5 is used for being installed on a machine head of the vacuum-pumping system, and a downstream end of the flow control valve 5 is communicated with a machine head air inlet of the vacuum-pumping system, obviously, an upstream end of the flow control valve is used for being connected with a vacuum-pumping target source, generally, an air inlet filter is required to be arranged at an upstream end of the flow control valve, so that foreign matters of the vacuum-pumping target source are prevented from being sucked into the machine head of the vacuum-pumping system, and normal operation of the vacuum-pumping system is guaranteed. One end of the first pipeline 1 is connected with an A port of the multi-way electromagnetic valve 6, and the other end of the first pipeline is connected with a control mechanism of the flow regulating valve 5. One end of the second pipeline 2 is connected with a port B of the multi-way electromagnetic valve 6, and the other end of the second pipeline is used for being connected with a machine head air inlet of the vacuum-pumping system. One end of the third pipeline 3 is connected with the port C of the multi-way electromagnetic valve 6, and the other end of the third pipeline is connected with the inner space of the separating core of the oil-gas separating tank matched with the vacuum-pumping system. In order to ensure safety, a fourth pipeline 4 is further arranged, one end of the fourth pipeline 4 is connected with the second pipeline 2, the other end of the fourth pipeline 4 is connected with the upstream end of the flow regulating valve 5, and a one-way valve 7 is arranged on the fourth pipeline 4.

The working principle of the invention is that a vacuum pumping system is connected with a vacuum pumping target source through an air inlet filter, an oil-gas mixture sprayed out of the oil-gas screw vacuum pump enters an inner cavity of an oil-gas separation tank through an air duct and is subjected to oil-gas separation, gas in the oil-gas separation tank is partially discharged through an exhaust port of the oil-gas separation tank, partial gas returns to the oil-gas screw vacuum pump through a third pipeline and a second pipeline, mixed oil is collected to the bottom of the oil-gas separation tank, the sprayed oil enters the oil-gas separation tank through an oil guide pipe of an oil way system and is collected to the bottom of the oil-gas separation tank, and the oil returns to the oil-gas screw vacuum pump through a return pipe of the oil way system to form circulation. When the vacuumizing target source needs to be vacuumized to form negative pressure, the port A is controlled to be communicated with the port B through the three-way electromagnetic valve, the communication degree of the port A and the port B is controlled according to actual requirements, pressure difference exists between the port A and the port B, the control mechanism of the flow regulating valve forms driving force to drive the flow regulating valve to be opened, the opening degree of the flow regulating valve is related to the communication degree of the port A and the port B, the purpose that the upstream end of the flow regulating valve is communicated with the vacuumizing machine head is achieved, the vacuumizing target source is vacuumized to form negative pressure, the purpose that the vacuum degree of the vacuumizing target source is controlled by wire control can be achieved, and the actual requirements of enterprises can be effectively. When the multi-way electromagnetic valve breaks down, the oil injection screw type vacuum pump is overloaded and exceeds a threshold value, the check valve is opened, the oil injection screw type vacuum pump directly vacuumizes the vacuumizing target source through the fourth pipeline to form negative pressure, the phenomenon that the oil injection screw type vacuum pump is overloaded is avoided, and the normal operation of the vacuumizing system can be effectively guaranteed.