Alarm device for abnormal pressure of argon system

Abstract

The utility model discloses an argon system pressure abnormity alarm device which comprises an argon tank, a chlorine tank and an equipment body which are respectively connected with a stainless steel tee joint through pipelines. A first manual cut-off valve, an argon pressure sensor and a first voltage cut-off valve are sequentially arranged on a pipeline between the argon tank and the stainless steel tee joint, and a second manual cut-off valve and a second voltage cut-off valve are sequentially arranged between the chlorine tank and the stainless steel tee joint; the argon pressure sensor, the first voltage cut-off valve and the second voltage cut-off valve are respectively connected with a PLC (Programmable Logic Controller) through lines, the PLC is connected with a low-pressure alarm through a line, and a third manual cut-off valve is arranged on a pipeline between the equipment body and the stainless steel tee joint. According to the utility model, the pressure sensor is additionally arranged at the outlet of the argon tank, and the PLC is used for carrying out closing operation on various cut-off valves.

Description

Technical Field

[0001] The utility model relates to an alarm device, in particular to an argon system pressure abnormality alarm device, belonging to the technical field of electrical automation. Background Art

[0002] During the mixed use of argon and chlorine, if the pressure of argon is lower than that of chlorine, chlorine may flow back into the argon pipeline, resulting in corrosion of the argon pipeline seals and pipelines; leading to corrosion of other equipment, poisoning of personnel and other hazards; the following problems exist in the mixed use of argon and chlorine: ①. During the use of chlorine, personnel need to check and pay attention to the pressure changes in the argon tank at any time, because after the pressure is low, if the personnel do not find in time that the chlorine pressure is higher than the argon pressure, the chlorine will not flow back into the argon pipeline, resulting in corrosion of the argon pipeline seals and pipelines, leading to corrosion of other equipment, poisoning of personnel and other hazards; ②. Because regular inspections cause a waste of human resources, there are also great safety hazards in the process of inspecting chlorine, which may cause irreversible damage to the inspectors if they are not careful. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide an argon system pressure abnormality alarm device. By setting a pressure sensor, the change of argon pressure can be effectively detected and the gas supply can be automatically cut off to achieve mutual non-contamination and resource waste between gases, thereby ensuring safe and stable operation of the equipment.

[0004] The technical solution adopted by the utility model to solve the technical problem is:

[0005] An argon system pressure abnormality alarm device comprises an argon tank, a chlorine tank and an equipment body, wherein the argon tank, the chlorine tank and the equipment body are respectively connected to a stainless steel tee through pipelines, a first manual shut-off valve, an argon pressure sensor and a first voltage shut-off valve are arranged on the pipeline between the argon tank and the stainless steel tee from left to right, a second manual shut-off valve and a second voltage shut-off valve are arranged on the pipeline between the chlorine tank and the stainless steel tee from right to left, the argon pressure sensor, the first voltage shut-off valve and the second voltage shut-off valve are respectively connected to a PLC controller through lines, the PLC controller is connected to a low pressure alarm through lines, and a third manual shut-off valve is arranged on the pipeline between the equipment body and the stainless steel tee.

[0006] A first voltage relay is connected between the argon pressure sensor and the PLC controller through a line, a second voltage relay is connected between the first voltage cut-off valve and the PLC controller through a line, a fourth voltage relay is connected between the second voltage cut-off valve and the PLC controller through a line, and a third voltage relay is connected between the PLC controller and the low pressure alarm through a line.

[0007] A first stainless steel flange is arranged on the pipeline between the argon pressure sensor and the first voltage cut-off valve, and a second stainless steel flange is arranged on the pipeline between the first voltage cut-off valve and the stainless steel tee.

[0008] A third stainless steel flange is arranged on the pipeline between the stainless steel tee and the second voltage cut-off valve, and a fourth stainless steel flange is arranged on the pipeline between the second voltage cut-off valve and the second manual cut-off valve.

[0009] The positive beneficial effects of the utility model are:

[0010] 1. When the utility model is used, when the pressure in the argon gas storage tank is too low, the pressure sensor is triggered, and the pressure sensor is transmitted to the PLC through the relay. After being processed by the internal control system of the PLC, instructions are respectively issued to ① the relay, so that the alarm sounds to remind on-site personnel to stay away from the chlorine equipment; ②, the relay issues an instruction to make the automatic shut-off valve cut off the outlet of the chlorine tank, thereby stopping the supply of chlorine; ③, the relay issues an instruction to make the automatic shut-off valve cut off the outlet of the argon tank, thereby preventing chlorine from recoil into the argon tank; at the same time, after the electric shut-off valve is cut off, in order to increase safety, a manual shut-off valve can also be used for manual closing, which provides double insurance and increases the safety of the equipment.

[0011] 2. The utility model can effectively detect the change of argon pressure by setting a pressure sensor, reduce the intensity of the staff, and at the same time, can automatically cut off the gas supply to achieve mutual non-contamination between gases and non-waste of resources, thus ensuring the safe and stable development of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Among them: 1-argon gas tank, 2-chlorine gas tank, 3-first manual shut-off valve, 4-argon gas pressure sensor, 5-first voltage shut-off valve, 6-stainless steel tee, 7-second voltage shut-off valve, 8-second manual shut-off valve, 9-third manual shut-off valve, 10-equipment body, 11-first voltage relay, 12-second voltage relay, 13-PLC controller, 14-third voltage relay, 15-low pressure alarm, 16-fourth voltage relay, 171-first stainless steel flange, 172-second stainless steel flange, 173-third stainless steel flange, 174-fourth stainless steel flange. DETAILED DESCRIPTION

[0014] The utility model is further explained and illustrated below in conjunction with the accompanying drawings:

[0015] For example, see Figure 1 A device for alarming abnormal pressure of an argon gas system comprises an argon gas tank 1, a chlorine gas tank 2 and a device body 10. The argon gas tank 1, the chlorine gas tank 2 and the device body 10 are respectively connected to a stainless steel tee 6 through pipelines. A first manual shut-off valve 3, an argon gas pressure sensor 4 and a first voltage shut-off valve 5 are arranged on the pipeline between the argon gas tank 1 and the stainless steel tee 6 from left to right. A second manual shut-off valve 8 and a second voltage shut-off valve 7 are arranged on the pipeline between the chlorine gas tank 2 and the stainless steel tee 6 from right to left. The argon gas pressure sensor 4, the first voltage shut-off valve 5 and the second voltage shut-off valve 7 are respectively connected to a PLC controller 13 through lines. The PLC controller 13 is connected to a low pressure alarm 15 through lines. A third manual shut-off valve 9 is arranged on the pipeline between the device body 10 and the stainless steel tee 6.

[0016] A first voltage relay 11 is connected between the argon pressure sensor 4 and the PLC controller 13 via a line, a second voltage relay 12 is connected between the first voltage cut-off valve 5 and the PLC controller 13 via a line, a fourth voltage relay 16 is connected between the second voltage cut-off valve 7 and the PLC controller 13 via a line, and a third voltage relay 14 is connected between the PLC controller 13 and the low pressure alarm 15 via a line.

[0017] A first stainless steel flange 171 is provided on the pipeline between the argon pressure sensor 4 and the first voltage cut-off valve 5 , and a second stainless steel flange 172 is provided on the pipeline between the first voltage cut-off valve 5 and the stainless steel tee 6 .

[0018] A third stainless steel flange 173 is provided on the pipeline between the stainless steel tee 6 and the second voltage cut-off valve 7 , and a fourth stainless steel flange 174 is provided on the pipeline between the second voltage cut-off valve 7 and the second manual cut-off valve 8 .

[0019] In the above description, the functions of the first stainless steel flange, the second stainless steel flange, the third stainless steel flange and the fourth stainless steel flange are: to have a longer service life under the flushing of special gases.

[0020] In the above description, the manual shut-off valves used are all made of stainless steel.

[0021] In the above description, when in use, the argon pressure sensor sends a signal to the PLC through a 24V safety voltage to the relay after it falls below the set 0.4Mpar.

[0022] In the above description, the information processed by the PLC controller is given with a 24V safety voltage to: ① The fourth voltage relay transmits a signal to the 230V low voltage alarm; the 230V low voltage alarm has a louder sound and covers a larger area; ② The second voltage relay transmits a signal to the first voltage cut-off valve.

[0023] In the above description, when used, the argon gas tank and argon gas tank must comply with the national standard tank body.

[0024] Working principle:

[0025] When in use, when the pressure in the argon gas storage tank is too low, the pressure sensor is triggered, and the pressure sensor is transmitted to the PLC through the relay. After being processed by the PLC internal control system, instructions are respectively issued to ① the relay, so that the alarm sounds to remind on-site personnel to stay away from the chlorine equipment; ②, the relay issues an instruction to make the automatic shut-off valve cut off the chlorine tank outlet, thereby stopping the chlorine supply; ③, the relay issues an instruction to make the automatic shut-off valve cut off the argon tank outlet, so that chlorine will not recoil into the argon tank; at the same time, after the electric shut-off valve is cut off, in order to increase safety, a manual shut-off valve can also be used for manual closing, which provides double insurance and increases the safety of the equipment.

[0026] The utility model installs a pressure sensor at the outlet of the argon tank and uses a PLC controller to shut down various shut-off valves, which can effectively detect changes in argon pressure, reduce the intensity of staff, ensure that gases do not pollute or waste each other, and ensure the safe and stable development of the equipment.

Claims

1. An argon system pressure abnormality alarm device, comprising an argon gas tank (1), a chlorine gas tank (2) and a device body (10), characterized in that: The argon gas tank (1), the chlorine gas tank (2), and the equipment body (10) are respectively connected to the stainless steel tee (6) through pipelines. A first manual shut-off valve (3), an argon gas pressure sensor (4), and a first voltage shut-off valve (5) are arranged in sequence from left to right on the pipeline between the argon gas tank (1) and the stainless steel tee (6). A second manual shut-off valve (8) and a second voltage shut-off valve (7) are arranged in sequence from right to left on the pipeline between the chlorine gas tank (2) and the stainless steel tee (6). The argon gas pressure sensor (4), the first voltage shut-off valve (5), and the second voltage shut-off valve (7) are respectively connected to the PLC controller (13) through lines. The PLC controller (13) is connected to a low-pressure alarm (15) through lines. A third manual shut-off valve (9) is arranged on the pipeline between the equipment body (10) and the stainless steel tee (6).

2. The argon system pressure abnormality alarm device according to claim 1, characterized in that: A first voltage relay (11) is connected between the argon pressure sensor (4) and the PLC controller (13) via a line, a second voltage relay (12) is connected between the first voltage cut-off valve (5) and the PLC controller (13) via a line, a fourth voltage relay (16) is connected between the second voltage cut-off valve (7) and the PLC controller (13) via a line, and a third voltage relay (14) is connected between the PLC controller (13) and the low-pressure alarm (15) via a line.

3. The argon system pressure abnormality alarm device according to claim 1, characterized in that: A first stainless steel flange (171) is provided on the pipeline between the argon pressure sensor (4) and the first voltage cut-off valve (5), and a second stainless steel flange (172) is provided on the pipeline between the first voltage cut-off valve (5) and the stainless steel tee (6).

4. The argon system pressure abnormality alarm device according to claim 1, characterized in that: A third stainless steel flange (173) is provided on the pipeline between the stainless steel tee (6) and the second voltage cut-off valve (7), and a fourth stainless steel flange (174) is provided on the pipeline between the second voltage cut-off valve (7) and the second manual cut-off valve (8).

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