Industrial gas plant safety shutdown device

Abstract

The utility model provides industrial gas equipment safety shutdown device belongs to safety shutdown device technical field, including gas steam boiler, combustion chamber, combustion engine, gas pipe and shutdown valve, the inside lower portion of gas steam boiler is installed with combustion chamber, the left end of combustion chamber is provided with the combustion engine, the gas inlet end of combustion engine is installed with gas pipe, installs the shutdown valve on the gas pipe, the one end of combustion chamber is installed with flame detection probe close to combustion engine, the one end of combustion chamber is installed with gas detector far from combustion engine, the utility model discloses when shutting off after the shutdown valve, if shutting off is not thorough, gas detector detects that natural gas content is overproof, and controller controls alarm to alarm, reminds staff that the shutdown valve is not completely shut off, and it is convenient for staff to shut off the gas source and maintains or repairs the shutdown valve, guarantees safety.

Description

Technical Field

[0001] This utility model relates to the field of safety shutdown device technology, and in particular to a safety shutdown device for industrial gas equipment. Background Technology

[0002] Industrial gases (such as oxygen, nitrogen, argon, hydrogen, natural gas, and various specialty gases) are widely used in metallurgy, chemical industry, medical field, electronics, and many other fields. These gases typically possess dangerous properties such as flammability, explosiveness, toxicity, combustion-supporting properties, or high pressure. Therefore, the safety of equipment used in their production, storage, transportation, and use is of paramount importance. Safety shut-off devices, as core components ensuring the safety of industrial gas equipment, can quickly cut off the gas supply when dangerous conditions such as leaks, abnormal pressure, or flame extinguishing are detected. They serve as the last automated line of defense against fires, explosions, and poisoning accidents. Currently, existing industrial gas safety shut-off devices typically consist of three parts: sensors (such as pressure switches, flame detectors, and gas concentration sensors), logic controllers (such as PLCs and safety relays), and actuators (such as solenoid valves and pneumatic shut-off valves). Their basic working principle is: sensors monitor key parameters, logic controllers determine whether safety limits are exceeded, and drive actuators to perform actions to achieve shut-off. For example, gas-fired steam boilers require the use of shut-off devices. When the burner in the steam boiler goes out or the natural gas content in the exhaust gas exceeds the standard, the gas input must be shut off in time through the shut-off device to prevent gas leakage. Existing safety shutdown devices lack effective online monitoring and diagnostic equipment after shutdown, which makes it impossible to detect potential safety hazards in a timely manner. For example, if the shutdown is incomplete, gas leakage may occur, which can easily cause serious safety accidents. Therefore, we need to design a safety shutdown device for industrial gas equipment to solve the above problems. Utility Model Content

[0003] The purpose of this utility model is to solve the problems existing in the above-mentioned background technology, and to propose an industrial gas equipment safety shut-off device.

[0004] The technical problem to be solved by this utility model is to provide a safety shutdown device for industrial gas equipment to solve the problems of existing safety shutdown devices for industrial gas equipment.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: An industrial gas equipment safety shut-off device includes a gas-fired steam boiler, a combustion chamber, a burner, a gas pipe, and a shut-off valve. The combustion chamber is installed on the lower inner side of the gas-fired steam boiler. The burner is installed through the left end of the combustion chamber. A gas pipe is installed at the gas inlet end of the burner. A shut-off valve is installed on the gas pipe. A flame detection probe is installed at the end of the combustion chamber near the burner, and a gas detector is installed at the end of the combustion chamber away from the burner. The shut-off valve includes a shut-off motor and a controller. The shut-off motor is installed on the outer surface of the shut-off valve, the controller is fixedly installed on the upper surface of the shut-off valve, and a shut-off assembly is installed inside the shut-off valve.

[0006] Preferably, the controller is electrically connected to the flame detection probe, the gas detector, and the shut-off motor.

[0007] Preferably, the controller is equipped with a forward and reverse switch for shutting off the motor, and the controller is electrically connected to an alarm.

[0008] Preferably, the shut-off assembly includes a fixed ring, an annular groove, a guide rod, an anti-detachment block, a rubber disc, a connecting rod, and a turntable. Fixed rings are fixedly installed on both the left and right sides inside the shut-off valve. An annular groove is formed on the side of the fixed ring facing the center of the shut-off valve. Multiple guide rods are fixedly installed within the annular groove. An anti-detachment block is fixedly installed at the end of each guide rod away from the fixed ring. A rubber disc is threaded through the guide rod. Connecting rods are rotatably installed on the side of each rubber disc facing the center of the shut-off valve. The other end of each connecting rod is rotatably mounted on the turntable, which is installed at the output end of the shut-off motor.

[0009] Preferably, the diameter of the rubber disc is the same as the diameter of the annular groove, and the diameter of the rubber disc is larger than the diameter of the central through hole of the fixing ring.

[0010] Preferably, when the rubber disc is embedded in the annular groove, the rubber disc and the annular groove are in an airtight connection.

[0011] Preferably, the rubber disc is completely detached from the annular groove when it is attached to the anti-detachment block.

[0012] Preferably, the connecting rod is rotatably positioned away from the center of the turntable, and when the turntable rotates, it can simultaneously drive the two rubber discs to embed into and dislodge from the annular groove.

[0013] Preferably, an inverted U-shaped pipe is provided through the gas pipe, and an ignition valve is installed on the inverted U-shaped pipe.

[0014] Preferably, the two penetration points of the inverted U-shaped pipe and the gas pipe are located on both sides of the shut-off valve.

[0015] Compared with the prior art, this utility model has at least the following beneficial effects:

[0016] In the above scheme, by setting up relevant shut-off valves, flame detection probes, gas detectors, and controllers, when the gas-fired steam boiler is working normally, the flame detection probe detects the flame of the burner burning normally, and the gas detector detects the natural gas content at the end of the combustion chamber. At this time, the shut-off valve is in the open state. When the flame detection probe detects that the burner is extinguished or the combustion is abnormal, and the gas detector detects that the natural gas content at the end of the combustion chamber exceeds the standard, the controller controls the shut-off valve to close, so as to stop the gas supply to the gas pipe in time and prevent gas leakage.

[0017] In the above solution, an alarm is installed. When the shut-off valve is closed but not completely closed, the gas detector detects that the natural gas content exceeds the standard. The controller then activates the alarm to remind the staff that the shut-off valve is not completely closed. This facilitates the staff in shutting off the gas source and maintaining or repairing the shut-off valve, ensuring safety.

[0018] In the above scheme, by setting up a shut-off component, when the burner is burning normally, the rubber disc detaches from the annular groove on the fixed ring and adheres to the anti-detachment block. At this time, the rubber disc will not obstruct the central through hole of the fixed ring, and the shut-off valve is in the open state, facilitating the normal supply of gas. When combustion is abnormal and shut-off is required, the controller controls the shut-off motor to drive the turntable to rotate counterclockwise. The turntable drives the two rubber discs to move in opposite directions along the guide rod through two connecting rods. The two rubber discs are simultaneously embedded in the annular grooves on the fixed rings on both sides inside the shut-off valve, achieving a dual shut-off effect, better sealing effect, and increased safety.

[0019] In the above scheme, by setting up an inverted U-shaped tube and an ignition valve, when the burner needs to be re-ignited, the ignition valve is opened, and the gas enters the burner through the inverted U-shaped tube, bypassing the shut-off valve, to facilitate normal combustion of the burner. When the flame detection probe and the gas detector in the combustion chamber detect that the flame combustion is normal and the natural gas content is normal, respectively, the shut-off valve is opened to supply natural gas to the burner, and then the ignition valve is closed. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0021] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model; Figure 2 This is a top view of the cross-sectional structure of this utility model; Figure 3 This is a three-dimensional structural diagram of the shut-off valve of this utility model; Figure 4 This is a schematic cross-sectional view of the shut-off valve of this utility model. Figure 1 ; Figure 5 This is a schematic cross-sectional view of the shut-off valve of this utility model. Figure 2 .

[0022] [Figure Labels] 1. Gas-fired steam boiler; 101. Combustion chamber; 2. Burner; 3. Gas pipe; 4. Shut-off valve; 5. Inverted U-shaped pipe; 6. Ignition valve; 7. Flame detection probe; 8. Gas detector; 9. Shut-off motor; 10. Controller; 1001. Alarm; 11. Fixing ring; 1101. Annular groove; 1102. Guide rod; 1103. Anti-detachment block; 1104. Rubber disc; 1105. Connecting rod; 1106. Turntable.

[0023] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0024] 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.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] like Figures 1-5As shown, an embodiment of this utility model provides a safety shut-off device for industrial gas equipment, including a gas-fired steam boiler 1, a combustion chamber 101, a burner 2, a gas pipe 3, and a shut-off valve 4. The combustion chamber 101 is installed on the lower inner side of the gas-fired steam boiler 1. The burner 2 is installed through the left end of the combustion chamber 101. The gas pipe 3 is installed at the gas inlet end of the burner 2. The shut-off valve 4 is installed on the gas pipe 3. A flame detection probe 7 is installed at the end of the combustion chamber 101 near the burner 2, and a gas detector 8 is installed at the end of the combustion chamber 101 away from the burner 2. The shut-off valve 4 includes a shut-off motor 9 and a controller 10. The shut-off motor 9 is installed on the outer surface of the shut-off valve 4, the controller 10 is fixedly installed on the upper surface of the shut-off valve 4, and a shut-off assembly is installed inside the shut-off valve 4.

[0027] In this embodiment, the controller 10 is electrically connected to the flame detection probe 7, the gas detector 8, and the shut-off motor 9.

[0028] In this embodiment, the controller 10 is equipped with a forward and reverse switch for shutting off the motor 9, and the controller 10 is electrically connected to an alarm 1001.

[0029] By configuring the shut-off valve 4, flame detection probe 7, gas detector 8, and controller 10, when the gas-fired steam boiler 1 is operating normally, the flame detection probe 7 detects the flame of the burner 2 burning normally, and the gas detector 8 detects the natural gas content at the tail end of the combustion chamber 101. At this time, the shut-off valve 4 is in the open state. When the flame detection probe 7 detects that the burner 2 is extinguished or the combustion is abnormal, and the gas detector 8 detects that the natural gas content at the tail end of the combustion chamber 101 exceeds the standard, the controller 10 controls the shut-off valve 4 to close, so as to stop the gas pipe 3 from supplying natural gas and prevent gas leakage.

[0030] With the alarm 1001 installed, when the shut-off valve 4 is not completely shut off, the gas detector 8 detects that the natural gas content exceeds the standard, and the controller 10 controls the alarm 1001 to sound an alarm, reminding the staff that the shut-off valve 4 is not completely shut off. This facilitates the staff to shut off the gas source and maintain or repair the shut-off valve 4, ensuring safety.

[0031] In this embodiment, the shut-off assembly includes a fixed ring 11, an annular groove 1101, a guide rod 1102, an anti-detachment block 1103, a rubber disc 1104, a connecting rod 1105, and a turntable 1106. Fixed rings 11 are fixedly installed on both the left and right sides inside the shut-off valve 4. An annular groove 1101 is opened on the side of the fixed ring 11 facing the center of the shut-off valve 4. Multiple guide rods 1102 are fixedly installed in the annular groove 1101. An anti-detachment block 1103 is fixedly installed on the end of the guide rod 1102 away from the fixed ring 11. A rubber disc 1104 is installed through the guide rod 1102. A connecting rod 1105 is rotatably installed on the side of the two rubber discs 1104 facing the center of the shut-off valve 4. The other end of the connecting rod 1105 is rotatably installed on the turntable 1106. The turntable 1106 is installed at the output end of the shut-off motor 9.

[0032] In this embodiment, the diameter of the rubber disc 1104 is the same as the diameter of the annular groove 1101, and the diameter of the rubber disc 1104 is larger than the diameter of the central through hole of the fixing ring 11.

[0033] In this embodiment, when the rubber disc 1104 is embedded in the annular groove 1101, the rubber disc 1104 and the annular groove 1101 are in an airtight connection.

[0034] In this embodiment, the rubber disc 1104 is completely detached from the annular groove 1101 when it is attached to the anti-detachment block 1103.

[0035] In this embodiment, the connecting rod 1105 is rotatably positioned on the turntable 1106 away from the center, and when the turntable 1106 rotates, it can simultaneously drive the two rubber discs 1104 to be inserted into the annular groove 1101 and to be dislodged from the annular groove 1101.

[0036] By setting up a shut-off component, when the burner 2 is burning normally, the rubber disc 1104 disengages from the annular groove 1101 on the fixing ring 11, and the rubber disc 1104 adheres to the anti-disengagement block 1103. At this time, the rubber disc 1104 will not obstruct the central through hole of the fixing ring 11, and the shut-off valve 4 is in the open state, facilitating the normal supply of gas. When combustion is abnormal and shut-off is required, the controller 10 controls the shut-off motor 9 to drive the turntable 1106 to rotate counterclockwise. The turntable 1106 drives the two rubber discs 1104 to move in opposite directions along the guide rod 1102 through two connecting rods 1105. The two rubber discs 1104 are simultaneously embedded in the annular grooves 1101 on the fixing ring 11 on both sides of the shut-off valve 4, achieving a double shut-off effect, better sealing effect, and increased safety.

[0037] In this embodiment, an inverted U-shaped pipe 5 is installed through the gas pipe 3, and an ignition valve 6 is installed on the inverted U-shaped pipe 5.

[0038] In this embodiment, the two penetration points of the inverted U-shaped pipe 5 and the gas pipe 3 are located on both sides of the shut-off valve 4.

[0039] With the inverted U-shaped tube 5 and ignition valve 6 installed, when the burner 2 needs to be re-ignited, the ignition valve 6 is opened, and the gas flows from the inverted U-shaped tube 5 around the shut-off valve 4 into the burner 2, facilitating normal combustion of the burner 2. When the flame detection probe 7 and the gas detector 8 in the combustion chamber 101 detect that the flame combustion is normal and the natural gas content is normal, respectively, the shut-off valve 4 is opened to supply natural gas to the burner 2, and then the ignition valve 6 is closed.

[0040] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A safety shut-off device for industrial gas equipment, characterized in that, The system includes a gas-fired steam boiler (1), a combustion chamber (101), a burner (2), a gas pipe (3), and a shut-off valve (4). The combustion chamber (101) is installed on the lower inner side of the gas-fired steam boiler (1). The burner (2) is installed through the left end of the combustion chamber (101). The gas pipe (3) is installed at the air inlet end of the burner (2). The shut-off valve (4) is installed on the gas pipe (3). A flame detection probe (7) is installed at the end of the combustion chamber (101) near the burner (2). A gas detector (8) is installed at the end of the combustion chamber (101) away from the burner (2). The shut-off valve (4) includes a shut-off motor (9) and a controller (10). The shut-off motor (9) is installed on the outer surface of the shut-off valve (4), and the controller (10) is fixedly installed on the upper surface of the shut-off valve (4). A shut-off assembly is installed inside the shut-off valve (4).

2. The industrial gas equipment safety shut-off device according to claim 1, characterized in that: The controller (10) is electrically connected to the flame detection probe (7), the gas detector (8), and the shut-off motor (9).

3. The industrial gas equipment safety shut-off device according to claim 2, characterized in that: The controller (10) is equipped with a forward and reverse switch for disconnecting the motor (9), and the controller (10) is electrically connected to an alarm (1001).

4. The industrial gas equipment safety shut-off device according to claim 3, characterized in that: The shut-off assembly includes a fixing ring (11), an annular groove (1101), a guide rod (1102), an anti-detachment block (1103), a rubber disc (1104), a connecting rod (1105), and a turntable (1106). Fixing rings (11) are fixedly installed on both the left and right sides inside the shut-off valve (4). An annular groove (1101) is opened on the side of the fixing ring (11) facing the center of the shut-off valve (4). Multiple guide rods (1102, 1103, 1104, 1105, 1106) are fixedly installed within the annular groove (1105). 2) An anti-detachment block (1103) is fixedly installed at one end of the guide rod (1102) away from the fixed ring (11). A rubber disc (1104) is installed through the guide rod (1102). A connecting rod (1105) is rotatably installed on one side of the two rubber discs (1104) facing the center of the shut-off valve (4). The other end of the connecting rod (1105) is rotatably installed on the turntable (1106). The turntable (1106) is installed at the output end of the shut-off motor (9).

5. The industrial gas equipment safety shut-off device according to claim 4, characterized in that: The diameter of the rubber disc (1104) is the same as that of the annular groove (1101), and the diameter of the rubber disc (1104) is larger than the diameter of the central through hole of the fixing ring (11).

6. The industrial gas equipment safety shut-off device according to claim 5, characterized in that: When the rubber disc (1104) is embedded in the annular groove (1101), the rubber disc (1104) and the annular groove (1101) are in an airtight connection.

7. The industrial gas equipment safety shut-off device according to claim 6, characterized in that: When the rubber disc (1104) is attached to the anti-detachment block (1103), it completely detaches from the annular groove (1101).

8. The industrial gas equipment safety shut-off device according to claim 7, characterized in that: The connecting rod (1105) is rotatably positioned away from the center of the turntable (1106), and when the turntable (1106) rotates, it can simultaneously drive the two rubber discs (1104) to be embedded in the annular groove (1101) and to be dislodged from the annular groove (1101).

9. The industrial gas equipment safety shut-off device according to claim 1, characterized in that: An inverted U-shaped pipe (5) is installed through the gas pipe (3), and an ignition valve (6) is installed on the inverted U-shaped pipe (5).

10. The industrial gas equipment safety shut-off device according to claim 9, characterized in that: The two penetration points of the inverted U-shaped pipe (5) and the gas pipe (3) are located on both sides of the shut-off valve (4).

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