Local control device matched with pneumatic switch valve DCS remote control

Abstract

The utility model discloses a local control device matched with pneumatic switch valve DCS remote control, which comprises a field valve, a remote control room and a local remote control box, and a local control loop, a change-over switch for local / remote switching and an operation switch for valve opening and closing control are arranged in the local remote control box. The operation switch is connected with the DCS control system in parallel, the change-over switch carries out line switching between the local control loop and the DCS control system, the local remote control box is an explosion-proof junction box with an installation stand column, and the change-over switch and the operation switch are key switches with keys. According to the utility model, two kinds of change-over switches, namely the change-over switch and the operation switch, are integrated, so that the change-over switch can be conveniently matched with an electromagnetic valve circuit of a pneumatic switch valve, an on-site switch control function is added, misoperation of unauthorized personnel can be prevented, and on-site opening / closing operation of a plurality of valves can be realized.

Description

Technical Field

[0001] The utility model relates to the field of instruments and meters, and in particular to a local control device coordinated with a pneumatic switch valve DCS remote control. Background Art

[0002] At present, lithium batteries are widely used, and a large number of lithium projects are being built. Most of the original lithium projects have a low degree of automation and mainly rely on manual on-site operations. With the substantial improvement of the level of automation control, the valve switch operation is now mainly controlled by the control room. However, according to the owner's response, in many cases, during the lithium production process, the valve switch status needs to be adjusted in time. At this time, the valve can only be switched manually in an emergency. Some valves are large, and manual switching is inefficient and very laborious, especially when closing a valve group with multiple valves. The efficiency is even lower. Since the control room is far away, it is impossible to know the on-site situation immediately, and it is impossible to adjust the valve status at any time according to the changes in working conditions. Therefore, the owner urgently needs a device that can not only perform remote DCS control operations under the remote DCS control of the existing control room without changing the accident state of the valve, but also complete the valve switch control by manual on-site switching operations. Utility Model Content

[0003] The purpose of the utility model is to provide a local control device for cooperating with the DCS remote control of the pneumatic switch valve which solves the above-mentioned problem. While retaining the remote switch control valve function of the original upper system for the user, the valve can be switched on and off locally, so as to adjust the valve switch state in time during the lithium production process.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a local control device for cooperating with the DCS remote control of a pneumatic switch valve, comprising a local valve and a remote control room, wherein the remote control room supplies power to the local valve through a remote control circuit with a DCS control system, and further comprising a local remote control box, wherein the local remote control box is provided with a local control circuit, a switching switch for local / remote switching, and an operating switch for valve switch control, wherein the operating switch is connected to the local control circuit and is connected in parallel with the DCS control system, wherein the switching switch is connected to the remote control circuit to switch the circuits of the local control circuit and the DCS control system, wherein the local remote control box is an explosion-proof junction box with an installation column, and wherein the switching switch and the operating switch are both key switches with keys.

[0005] Preferably, the on-site valve is a valve group composed of a plurality of valves, and the operating switch is arranged in the explosion-proof junction box according to the number of valves.

[0006] Preferably, the switching switch and the operating switch are both arranged on the front side of the explosion-proof junction box, and a switch mark is correspondingly provided on the front side of the explosion-proof junction box.

[0007] Preferably, the installation column of the explosion-proof junction box is a hollow installation column, and is connected to the interior of the explosion-proof junction box.

[0008] Preferably, a base is provided at the bottom of the mounting column.

[0009] Compared with the prior art, the advantages of the utility model are:

[0010] (1) The utility model integrates two types of switching switches, namely a switching switch and an operating switch, which can be conveniently matched with the pneumatic switch valve solenoid valve circuit, thereby increasing the local switch control function.

[0011] (2) Both the transfer switch and the operating switch should be keyed to prevent unauthorized personnel from operating them incorrectly. Only operators with keys can operate them.

[0012] (3) It can realize the on-site opening / closing operation of multiple valves. During the project implementation, the same number of switches can be set according to the number of valves that need to be operated and the external dimensions of the explosion-proof junction box can be changed.

[0013] (4) The utility model does not change the accident state of the valve, does not increase the length of the on-site cable laying, and does not change the cable laying route. During the project implementation, the local remote control box can be installed on a path far away from the valve group or installed close to the valve group.

[0014] (5) When in remote operation state, the transfer switch should be put into the remote position and the operating switch should be put into the neutral position; when local manual operation is required, the authorized personnel will put the transfer switch into the local position and complete the valve opening and closing control by operating the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the device structure of the utility model;

[0016] Figure 2 It is the circuit wiring diagram between the utility model and the on-site valve and the remote control room;

[0017] Figure 3 This is a circuit schematic diagram of the utility model.

[0018] In the figure, 1. On-site valve; 2. On-site remote control box; 21. Explosion-proof junction box; 22. Switch; 23. Operating switch; 24. Mounting column; 25. Base; 26. Switch label; 3. Remote control room. DETAILED DESCRIPTION

[0019] The utility model will be further described below.

[0020] A local control device that cooperates with the DCS remote control of the pneumatic switch valve, see Figures 1 to 3 , including a field valve 1 and a remote control room 3, the remote control room 3 supplies power to the field valve 1 through a remote control circuit with a DCS control system, and also includes a local remote control box 2, the local remote control box 2 is provided with a local control circuit and a switch 22 for local / remote switching and an operating switch 23 for valve switch control, the operating switch 23 is connected to the local control circuit and is connected in parallel with the DCS control system, the switch 22 is connected to the remote control circuit, and the circuit switching between the local control circuit and the DCS control system is performed, the local remote control box 2 is an explosion-proof junction box 21 with a mounting column 24, and the switch 22 and the operating switch 23 are both key switches with keys. The utility model integrates a switch 22 and an operating switch 23, and can be conveniently matched with the pneumatic switch valve solenoid valve circuit, and increases the local switch control function, and the switch 22 and the operating switch 23 are both switches with keys, which can prevent unauthorized personnel from misoperating, and only operators with keys can operate. The utility model does not change the accident state of the valve, does not increase the length of the cable laid on site, and does not change the cable laying route. During project implementation, the solution can be installed on a path far away from the valve group or installed close to the valve group.

[0021] When switching between local and remote lines: when in remote operation state, the switching switch 22 should be put into the remote position and the operating switch 23 should be put into the neutral position; when local manual operation is required, the authorized personnel will put the switching switch 22 into the local position and complete the switch control of the valve by operating the switch 23.

[0022] The field valve 1 is a valve group composed of a plurality of valves. The operating switch 23 is arranged in the explosion-proof junction box 21 according to the number of valves, so as to realize the on-site opening / closing operation of a plurality of valves. When the project is implemented, the same number of switches can be arranged and the external dimensions of the explosion-proof junction box 21 can be changed according to the number of valves to be operated as required.

[0023] The switching switch 22 and the operating switch 23 are both arranged on the front of the explosion-proof junction box 21 to facilitate switch operation. A switch mark 26 is correspondingly arranged on the front of the explosion-proof junction box 21. The switch mark 26 can clearly identify the corresponding switch function and the corresponding gear adjustment.

[0024] The mounting column 24 of the explosion-proof junction box 21 is a hollow mounting column 24, and is connected to the inside of the explosion-proof junction box 21. The cable of the remote control loop is pre-buried in the underground cable pipe. After fixing the mounting column 24, the pre-buried cable can pass through the hollow mounting column 24 and upward into the explosion-proof junction box 21 for wiring. After wiring, it is passed back downward into the cable pipe to connect to the on-site valve 1, so that internal wiring can be realized, and the cables can be avoided from being exposed to the outside, and the cables can be prevented from being damaged by outsiders, causing misoperation of the valve. A base 25 is provided at the bottom of the mounting column 24, and the explosion-proof junction box 21 can be stably installed through the base 25.

[0025] For the wiring diagram of the on-site valve 1, remote control room 3 and local remote control box 2, see Figure 2 , when switching gears:

[0026] Operation switch 23: When it is set to "on", 1.2 is connected, 3.4 is blocked; when it is set to "off", 3.4 is connected, 1.2 is blocked; when it is set to "neutral", 1.2.3.4 are all blocked.

[0027] Switch 22: When it is set to the "remote" position, 1.2 is connected and 3.4 is blocked; when it is set to the "local" position, 3.4 is connected and 1.2 is blocked.

[0028] The above is a detailed introduction to a local control device and process for cooperating with a pneumatic switch valve DCS remote control provided by the utility model. In this article, specific examples are used to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model; at the same time, for a general technician in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope, and changes and improvements to the utility model will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A local control device for DCS remote control of a pneumatic switch valve, comprising a local valve and a remote control room, wherein the remote control room supplies power to the local valve through a remote control loop with a DCS control system, characterized in that: It also includes a local remote control box, which is provided with a local control circuit, a switching switch for local / remote switching, and an operating switch for valve switch control. The operating switch is connected to the local control circuit and is connected in parallel with the DCS control system. The switching switch is connected to the remote control circuit to switch the circuits of the local control circuit and the DCS control system. The local remote control box is an explosion-proof junction box with a mounting column, and the switching switch and the operating switch are both key switches with keys.

2. According to claim 1, a local control device for cooperating with a pneumatic switch valve DCS remote control is characterized in that: The on-site valve is a valve group composed of a plurality of valves, and the operating switch is arranged in the explosion-proof junction box according to the number of valves.

3. According to claim 2, a local control device for cooperating with a pneumatic switch valve DCS remote control is characterized in that: The switching switch and the operating switch are both arranged on the front side of the explosion-proof junction box, and the front side of the explosion-proof junction box is correspondingly provided with a switch mark.

4. According to claim 2, a local control device for cooperating with a pneumatic switch valve DCS remote control is characterized in that: The installation column of the explosion-proof junction box is a hollow installation column and is connected to the inside of the explosion-proof junction box.

5. According to claim 4, a local control device for cooperating with DCS remote control of pneumatic switch valve is characterized in that: A base is provided at the bottom of the mounting column.

Images