Protection device for improving reliability of vacuum pump system

Abstract

The utility model relates to a protection device for improving the reliability of a vacuum pump system. The protection device comprises a vacuum pump, a local control cabinet, a DCS control cabinet and an operator station, the local control cabinet is electrically connected with the DCS control cabinet; the DCS control cabinet is electrically connected with the operator station; a differential pressure transmitter and an inlet pneumatic butterfly valve are respectively arranged on two sides of a pipeline of the vacuum pump; the differential pressure transmitter and the inlet pneumatic butterfly valve are electrically connected with the local control cabinet; a front pressure transmitter and a rear pressure transmitter are arranged on the two sides of the inlet pneumatic butterfly valve respectively. The front pressure transmitter and the rear pressure transmitter are electrically connected with the DCS control cabinet; the operator station is a control computer. Compared with the prior art, the utility model has the advantages of high reliability, reduced failure rate of the vacuum pump system and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vacuum pump protection technical field especially is related to a kind of protection device for improving the reliability of vacuum pump system. BACKGROUND

[0002] In power generation equipment, the DCS picture can only see valve state feedback signal when vacuum pump system inlet butterfly valve is put into operation, and the valve cannot be operated. The valve operation is mainly controlled by the operation button of the local control cabinet, and the interlock is mainly realized by the local differential pressure switch. When the vacuum pump is started, the differential pressure before and after the inlet disc valve reaches 3KPa or more to automatically open the disc valve, and the vacuum pump is stopped. When the inlet disc valve is connected, if the vacuum pump does not work normally and the inlet disc valve is opened, the unit vacuum will leak and rapidly drop, and even the unit will be stopped, but the staff can only go to the scene to open and close the butterfly valve, which will lead to long emergency treatment time, so that the vacuum pump is damaged. UTILITY MODEL CONTENTS

[0003] The utility model aims at overcoming the defects of the prior art and providing a protection device for improving the reliability of vacuum pump system.

[0004] The utility model can achieve the purpose by the following technical scheme.

[0005] A protection device for improving the reliability of vacuum pump system, comprising a vacuum pump, a local control cabinet, a DCS control cabinet and an operator station, the local control cabinet is electrically connected with the DCS control cabinet, the DCS control cabinet is electrically connected with the operator station, the pipeline of the vacuum pump is provided with a differential pressure transmitter and an inlet pneumatic butterfly valve on both sides respectively, the differential pressure transmitter and the inlet pneumatic butterfly valve are electrically connected with the local control cabinet, the inlet pneumatic butterfly valve is provided with a front pressure transmitter and a rear pressure transmitter on both sides respectively, the front pressure transmitter and the rear pressure transmitter are electrically connected with the DCS control cabinet, and the operator station is a control computer.

[0006] Further, the inlet pneumatic butterfly valve is a double-coil two-position five-way ASCO solenoid valve.

[0007] Further, the local control cabinet is a control cabinet provided with local switch operation and remote control system.

[0008] Further, the differential pressure transmitter is a pressure threshold 3KPa transmitter.

[0009] Compared with the prior art, the utility model has the following advantages.

[0010] The utility model discloses a remote operation function is added to the inlet pneumatic disc valve, and the associated interlock logic is optimized, and the valve can be operated by remote command in the emergency, guarantees the safe and stable operation of system, improves the stability and reliability of vacuum pump system, and through the computer end of remote operator station, the parameter of system can be monitored remotely, realizes the trouble early warning, and effectively reduces the failure rate of vacuum pump system. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The utility model provides structural schematic diagram for providing.

[0012] Figure 2 The utility model provides inlet pneumatic butterfly valve interlocking logic diagram for providing.

[0013] The figure label shows:

[0014] 1, vacuum pump;2, on -the -spot control cabinet;3, DCS control cabinet;4, operator station;5, differential pressure transmitter;6, inlet pneumatic butterfly valve;7, front pressure transmitter;8, rear pressure transmitter. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be described clearly and completely below in conjunction with the drawings in the utility model embodiment, obviously, the described embodiment is a part of the embodiment of the utility model, instead of all the embodiment. The components of the utility model embodiment described and shown in the drawing here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiment in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0017] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0018] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, or is the orientation or position relation of the utility model product when using conventionally, just is for the convenience of describing the utility model and simplifying the description, and cannot indicate or imply that the indicated device or element must have a particular orientation, construct and operate, therefore cannot be understood as the limitation of the utility model.

[0019] It needs to explain that the term "first", "second" is only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the application, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0020] In addition, the terms "horizontal", "vertical" and other terms do not mean that the components must be absolutely horizontal or suspended, but can be slightly inclined. As "horizontal" only means that its direction is more horizontal relative to "vertical", not that the structure must be completely horizontal, but can be slightly inclined.

[0021] Example 1

[0022] As Figure 1 shown, a protection device for improving the reliability of a vacuum pump system, comprising a vacuum pump 1, a local control cabinet 2, a DCS control cabinet 3 and an operator station 4; the local control cabinet 2 is electrically connected with the DCS control cabinet 3, and the local control cabinet 2 is provided with two modes of local switch operation and remote control system; the DCS control cabinet 3 is electrically connected with the operator station 4; the pipeline of the vacuum pump 1 is provided with a differential pressure transmitter 5 and an inlet pneumatic butterfly valve 6 on both sides respectively; the differential pressure transmitter 5 and the inlet pneumatic butterfly valve 6 are electrically connected with the local control cabinet 2; the inlet pneumatic butterfly valve 6 is provided with a front pressure transmitter 7 and a rear pressure transmitter 8 on both sides respectively; the front pressure transmitter 7 and the rear pressure transmitter 8 are electrically connected with the DCS control cabinet 3; the operator station 4 is a control computer; the inlet pneumatic butterfly valve 6 is a double-coil two-position five-way ASCO solenoid valve, which prevents the solenoid valve from failing due to long-time electrification and improves the reliability of the butterfly valve; the differential pressure transmitter 5 is a pressure threshold 3KPa transmitter, which sends a signal to the local control cabinet 2 when the threshold is reached.

[0023] As Figure 2 shown, the inlet pneumatic butterfly valve 6 of the vacuum pump 1 is connected as follows:

[0024] 1)Interlock logic: Condition 1: When the differential pressure transmitter 5 of the inlet pneumatic disc valve 6 of the vacuum pump 1 reaches the threshold 3KPa, the differential pressure transmitter 5 sends an inlet differential pressure signal of 1 to the local control cabinet 2, the local control cabinet 2 sends a signal to the DCS control cabinet 3, and the operator station 4 receives the signal;

[0025] Condition 2: When the pressure transmitter 8 behind the inlet pneumatic disc valve 6 is less than the pressure transmitter 7 in front of the inlet pneumatic disc valve 6 (i.e. the condenser vacuum) 2KPa, a pulse signal is sent to the DCS control cabinet 2 after a delay of 3 seconds, and the operator station 4 receives the signal. When one of the conditions 1 and 2 is met and the vacuum pump 1 is running, the operator station 4 sends a 5S pulse to the DCS control cabinet 3, the DCS control cabinet 3 sends a signal to the local control cabinet 2, and the local control cabinet 2 sends an opening valve signal to the inlet pneumatic disc valve 6, and the inlet pneumatic disc valve 6 is opened;

[0026] 2)Interlock logic: When the vacuum pump 1 is shut down, the operator station 4 sends a 5S pulse to the DCS control cabinet 3, the DCS control cabinet 3 sends a signal to the local control cabinet 2, the local control cabinet 2 sends a closing valve signal to the inlet pneumatic disc valve 6, and the inlet pneumatic disc valve 6 is closed;

[0027] 3)Allow opening logic: When the vacuum pump 1 is running, an opening permission signal is sent, and the inlet pneumatic disc valve 6 is allowed to open.

[0028] The local control cabinet 2 is provided with two modes of local switch operation and remote control system. In addition to remote control of the inlet pneumatic disc valve 6 by the operator at the operator station 4, the inlet pneumatic disc valve 6 can also be controlled locally by the local control cabinet 2 on site, which greatly shortens the emergency processing time, improves the reliability and stability of the vacuum pump system, and reduces the system failure rate.

[0029] The above describes a preferred embodiment of the utility model. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the utility model. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the utility model shall be within the protection scope defined by the claims.

Claims

1. A protection device for improving the reliability of a vacuum pump system, characterized in that, It comprises a vacuum pump (1), a local control cabinet (2), a DCS control cabinet (3) and an operator station (4); the local control cabinet (2) is electrically connected with the DCS control cabinet (3); the DCS control cabinet (3) is electrically connected with the operator station (4); the vacuum pump (1) is provided with a differential pressure transmitter (5) and an inlet pneumatic butterfly valve (6) on both sides of a pipeline; the differential pressure transmitter (5) and the inlet pneumatic butterfly valve (6) are electrically connected with the local control cabinet (2); the inlet pneumatic butterfly valve (6) is provided with a front pressure transmitter (7) and a rear pressure transmitter (8) on both sides; the front pressure transmitter (7) and the rear pressure transmitter (8) are electrically connected with the DCS control cabinet (3); and the operator station (4) is a control computer.

2. The protection device for improving reliability of a vacuum pump system according to claim 1, characterized in that, The inlet pneumatic butterfly valve (6) is a double-coil two-position five-way ASCO solenoid valve.

3. The protection device for improving reliability of a vacuum pump system according to claim 1, characterized in that, The local control cabinet (2) is a control cabinet provided with a local switch operation and a remote control system.

4. The protection device for improving reliability of a vacuum pump system according to claim 1, characterized in that, The differential pressure transmitter (5) is a transmitter with a pressure threshold of 3KPa.

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