Total flue damper device
Through the gate device of the solenoid valve-driven cylinder and electric hoist combined with the limit switch, the problems of slow manual operation speed and safety hazards in the prior art are solved, and the rapid automatic control of the gate is realized, and production safety and operation convenience are improved.
Patent Information
- Application Number
- CN202422576397.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-24
AI Technical Summary
The existing main flue gate device requires manual operation, slow lifting speed, difficult operation, safety hazards, and cannot meet the production process needs.
The gate plate device with the cylinder driven by a solenoid valve is adopted, combined with the electric hoist and the limit switch, to achieve automatic control. The opening and closing of the gate is driven by the solenoid valve and the cylinder, and the counterweight is operated by the electric hoist or manual operation to ensure rapid response to emergencies.
It realizes rapid and automated operation of the gate plate, eliminates the safety hazards of manual operation, improves production safety and convenience of operation, and has a simple and reliable structure.
Smart Images
Figure CN223227876U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas treatment, in particular to a main flue damper device. Background Art
[0002] With the commissioning of the desulfurization and denitrification system, production safety risks have increased. It is necessary to install a shutoff gate on the path from the flue to the exhaust chimney to block airflow to the exhaust chimney and extract the flue gas for reuse. The existing manual gate lifting device requires two people to manually pull up the main flue gate. The manual lifting speed is slow and cannot meet the production process requirements. It is difficult for operators to operate and the operating environment is poor, posing a safety hazard. Utility Model Content
[0003] The utility model aims to provide a main flue damper device which does not require manual lifting of the damper and is simple to operate, safe and reliable.
[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions:
[0005] A main flue damper device includes a damper bracket, a damper, a damper bottom plate, and a control unit. The two sides of the damper are flat, and the damper bracket is adapted to the shape of the two sides of the damper. The damper bottom plate is provided with a bottom groove adapted to the damper. The damper can fall into the bottom groove when closed. The damper bottom plate is fixedly connected to the bottom of the flue. The damper bracket passes through the flue to above the ground. The upper crossbeam at the top of the damper bracket is provided with a cylinder. The cylinder rod of the cylinder is fixedly connected to the damper. The base of the cylinder is fixedly connected to the upper crossbeam. The cylinder is driven by an electromagnetic valve. Limit switch 1 and limit switch 2 are provided on both sides of the damper bracket from top to bottom. Limit switch 1 is used to detect the damper open position signal, and limit switch 2 is used to detect the damper closed position signal. The electromagnetic valve, limit switch 1, and limit switch 2 are respectively connected to the control unit.
[0006] The control unit includes a control loop and a PLC, and the control loop is connected to the PLC.
[0007] The control circuit includes an operation circuit and a status indication circuit connected in parallel. The input end of the operation circuit is connected to the output end of the circuit breaker, and the input end of the circuit breaker is connected to the AC power supply. The operation circuit includes a local operation circuit, a remote operation circuit, and a solenoid valve operation circuit. The local operation circuit and the remote operation circuit are connected, and the solenoid valve operation circuit and the status indication circuit are connected in parallel.
[0008] The local operating circuit includes the normally open contact 1 of the transfer switch SA, the normally open contact of the start button SB, the normally closed contact of the stop button SP, and the coil of the relay KA, which are connected in series. The normally open contact 1 of the relay KA is connected in parallel with the coil of the relay KA.
[0009] The remote operation circuit includes the normally open contact 2 of the transfer switch SA and the normally open contact K1 of the PLC connected in series, and the normally open contact 2 of the relay KA is connected in parallel with the normally open contact K1 of the PLC;
[0010] The normally open contact three of relay KA is connected in series with the solenoid valve.
[0011] The status indication circuit includes a fully open indication circuit and a fully closed indication circuit connected in parallel. The fully open indication circuit includes the normally open contact and the fully open indicator light of the limit switch 1 connected in series. The fully closed indication circuit includes the normally open contact and the fully closed indicator light of the limit switch 2 connected in series.
[0012] The PLC includes a CPU module, and the normally open contact K1 of the PLC is connected to the digital output port of the CPU module.
[0013] The air cylinder is connected to the air storage tank through a pipeline, the control unit and the electromagnetic valve are arranged in the operation box, and the air storage tank and the operation box are arranged on the ground.
[0014] The upper crossbeam is also equipped with an electric hoist, and the gate is connected to the electric hoist through a wire rope.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] 1. The upper beam is equipped with a cylinder, which is driven by the solenoid valve YV. When the desulfurization and denitrification system fails or there is insufficient suction in the flue or an emergency such as a power outage in the entire plant, the gate is opened and the cylinder drives the gate to move. The structure is simple, safe and reliable.
[0017] 2. The upper beam is equipped with an electric hoist. When the cylinder fails, the counterweight is lowered by the electric hoist to open the gate, or the counterweight is manually lifted by the electric hoist to close the gate, thereby improving production safety.
[0018] 3. The solenoid valve YV, full-open limit switch SQO, and full-close limit switch SQC are connected to the control unit respectively. On-site operators can check the gate operating status at any time through the full-open indicator HD2 and full-close indicator HD3 on the ground operation box, which simplifies maintenance and saves time and effort.
[0019] 4. The normally open contact 2 of the transfer switch SA and the normally open contact K1 of the PLC, the normally open contact 1 of the transfer switch SA, the normally open contact of the start button SB, the normally closed contact of the stop button SP, the coil of the relay KA, and the normally open contact 3 of the relay KA are connected in series with the solenoid valve YV, which makes it convenient for the operator to realize local and remote operation of switching the gate through the transfer switch SA. The structure is simple and easy to implement;
[0020] 5. The normally open contact 3 of SA, the normally open contact of the fault relay KT1, the full-open signal KA2, and the full-close signal KA3 are respectively connected to the digital input port of the CPU module, so that the operators in the control room can check the running status of the gate at any time. The normally open contact K1 of the PLC is connected to the digital output port of the CPU module. The operators in the control room can open / close the gate through the start / stop button on the HMI human-machine interaction screen, without having to manually lift the gate, eliminating safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 Schematic diagram of the main flue damper device structure.
[0022] Figure 2 Schematic diagram of the AA structure of the main flue damper device.
[0023] Figure 3 It is a schematic diagram of the electrical principle of the main flue damper device.
[0024] In the figure: 1-gate plate 2-gate plate bracket 3-gate bottom plate 4-flue 5-cylinder 6-electric hoist 7-upper beam 8-full open limit switch SQO 9-full close limit switch SQC 10-operating box 11-gas storage tank 12-wire rope 13-counterweight 14-awning 15-intermediate limit switch. DETAILED DESCRIPTION
[0025] The present invention will be described in detail below with reference to the accompanying drawings. However, it should be noted that the implementation of the present invention is not limited to the following embodiments.
[0026] The following examples are implemented under the premise of the technical solution of the present utility model, and provide detailed implementation methods and specific operating processes, but the scope of protection of the present utility model is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.
[0027] [Example 1]
[0028] See Figure 1 ,See Figure 2A control device for a main flue 4 damper 1 includes a damper bracket 2, a damper 1, a damper bottom plate 3, and a control unit. The two sides of the damper 1 are flat, and the damper bracket 2 is adapted to the shape of the two sides of the damper 1. The damper bottom plate 3 is provided with a bottom groove adapted to the damper 1. The damper 1 can fall into the bottom groove when closed. The damper bottom plate 3 is fixedly connected to the bottom of the flue 4. The damper bracket 2 passes through the flue 4 to the ground. The upper crossbeam 7 at the top of the damper bracket 2 is provided with a cylinder 5. The cylinder rod of the cylinder 5 is fixedly connected to the damper 1. The base of the cylinder 5 is fixedly connected to the damper 1. It is fixedly connected to the upper crossbeam 7, and the cylinder 5 is driven by the solenoid valve YV. The two sides of the gate bracket 2 are provided with a fully open limit switch SQO and a fully closed limit switch SQC from top to bottom. The fully open limit switch SQO is used to detect the gate 1 opening position signal; the cylinder 5 is connected to the gas tank 11 through a pipeline, the control unit and the solenoid valve YV are arranged in the operation box 10, and the gas tank 11 and the operation box 10 are arranged on the ground; the upper crossbeam 7 is also provided with an electric hoist 6, and the gate 1 is connected to the electric hoist 6 through a wire rope 12.
[0029] See Figure 3 The control circuit includes an operation circuit and a status indication circuit connected in parallel. The input end of the operation circuit is connected to the output end of the circuit breaker, and the input end of the circuit breaker is connected to the UPS AC220V power supply. The operation circuit includes a local operation circuit, a remote operation circuit, a solenoid valve YV operation circuit, and a fault circuit. The local operation circuit is connected to the remote operation circuit. The solenoid valve YV operation circuit, the status indication circuit, and the fault circuit are connected in parallel. The local operation circuit includes the normally open contact 1 of the transfer switch SA, the normally open contact of the start button SB, the normally closed contact of the stop button SP, and the coil of the relay KA connected in series. The normally open contact 1 of the relay KA is connected in parallel with the coil of the relay KA; the remote operation circuit includes the normally open contact 2 of the transfer switch SA and the normally closed contact of the stop button SP connected in series. The normally open contact K1 of the PLC and the normally open contact 2 of the relay KA are connected in parallel with the normally open contact K1 of the PLC; the normally open contact 3 of the relay KA is connected in series with the coil of the solenoid valve YV; the status indication circuit includes a fully open indication circuit and a fully closed indication circuit connected in parallel, the fully open indication circuit includes the normally open contact of the fully open limit switch SQO and the fully open indicator light HD2 connected in series, the coil of the relay KA2 is connected in parallel with the fully open indicator light HD2, the fully closed indication circuit includes the normally open contact of the fully closed limit switch SQC and the fully closed indicator light HD3 connected in series, the coil of the relay KA3 is connected in parallel with the fully closed indicator light HD3; the fault circuit includes the normally open contact 4 of KA1, the normally closed contact of the relay KA2, and the coil of the time relay KT1 connected in series.
[0030] The PLC includes a CPU module. The normally open contact K1 of the PLC is connected to the digital output port of the CPU module. The normally open contact three of the SA, the normally open contact of the fault relay KT1, the fully open signal KA2 (that is, the normally open contact of the relay KA2), and the fully closed signal KA3 (that is, the normally open contact of the relay KA3) are respectively connected to the digital input port of the CPU module.
[0031] Working process:
[0032] The gate opening is interlocked with the desulfurization and denitrification system: When the desulfurization and denitrification system is operating normally, the gate is normally closed. In the event of a malfunction in the desulfurization and denitrification system, insufficient flue suction reaching the interlock setpoint, or a plant-wide power outage, the interlock opens the gate. This opening is performed by a pneumatic cylinder, unhooking the counterweight 13 connected to the gate, which then drops and lifts the gate. The gate must open rapidly, taking no more than 5 seconds. Once the desulfurization and denitrification system resumes operation, the counterweight is manually lifted by an electric hoist on-site, closing the gate. The cylinder solenoid valve is always powered by a UPS located in the central control room, which is connected first. In the event of a plant-wide power outage or unexpected malfunction requiring emergency activation of the cylinder solenoid valve, the central control room provides a UPS activation signal, which activates the cylinder solenoid valve, unhooking the counterweight box and rapidly lifting the main flue gate. Regardless of the proximity switch position, emergency activation of the cylinder solenoid valve takes priority.
[0033] The utility model has an upper crossbeam with a cylinder, which is driven by a solenoid valve YV. When the desulfurization and denitrification system fails to operate or there is insufficient suction in the flue or there is a power outage in the entire plant, the gate is opened and the cylinder drives the gate to move. The structure is simple, safe and reliable. The upper crossbeam is provided with an electric hoist. When the cylinder fails, the counterweight is lowered by the electric hoist to open the gate or the counterweight is manually lifted by the electric hoist to close the gate, thereby improving production safety. The solenoid valve YV, the full-open limit switch SQO, and the full-close limit switch SQC are respectively connected to the control unit. The on-site operator can check the operating status of the gate at any time through the full-open indicator HD2 and the full-close indicator HD3 on the ground operation box. The maintenance is simple, time-saving and labor-saving. The normally open contact 2 of the transfer switch SA and the normally open contact K1 of the PLC, the transfer switch SA The normally open contact 1 of the start button SB, the normally closed contact of the stop button SP, the coil of the relay KA, and the normally open contact 3 of the relay KA are connected in series with the solenoid valve YV, which makes it convenient for the operator to realize local operation and remote operation of switching the gate through the conversion switch SA. The structure is simple and easy to implement; the normally open contact 3 of SA, the normally open contact of the fault relay KT1, the full-open signal KA2, and the full-close signal KA3 are respectively connected to the digital input port of the CPU module, so that the operator in the control room can check the operating status of the gate at any time, and the normally open contact K1 of the PLC is connected to the digital output port of the CPU module. The operator in the control room can realize the opening / closing operation of the gate through the start / stop button on the HMI human-machine interaction screen, without the need to manually lift the gate, eliminating safety hazards.
Claims
1. A main flue damper device, characterized in that: It includes a gate bracket, a gate, a gate bottom plate, and a control unit. The two sides of the gate are flat, and the gate bracket is adapted to the shape of the two sides of the gate. The gate bottom plate is provided with a bottom groove adapted to the gate, and the gate can fall into the bottom groove when closed. The gate bottom plate is fixedly connected to the bottom of the flue, and the gate bracket passes through the flue to above the ground. The upper crossbeam at the top of the gate bracket is provided with a cylinder, the cylinder rod of the cylinder is fixedly connected to the gate, and the base of the cylinder is fixedly connected to the upper crossbeam. The cylinder is driven by an electromagnetic valve, and limit switch 1 and limit switch 2 are provided on both sides of the gate bracket from top to bottom. Limit switch 1 is used to detect the gate open position signal, and limit switch 2 is used to detect the gate closed position signal. The electromagnetic valve, limit switch 1 and limit switch 2 are respectively connected to the control unit.
2. A main flue damper device according to claim 1, characterized in that: The control unit includes a control loop and a PLC, and the control loop is connected to the PLC.
3. A main flue damper device according to claim 2, characterized in that: The control circuit includes an operation circuit and a status indication circuit connected in parallel. The input end of the operation circuit is connected to the output end of the circuit breaker, and the input end of the circuit breaker is connected to the AC power supply. The operation circuit includes a local operation circuit, a remote operation circuit, and a solenoid valve operation circuit. The local operation circuit and the remote operation circuit are connected, and the solenoid valve operation circuit and the status indication circuit are connected in parallel.
4. A main flue damper device according to claim 3, characterized in that: The local operating circuit includes the normally open contact 1 of the transfer switch SA, the normally open contact of the start button SB, the normally closed contact of the stop button SP, and the coil of the relay KA, which are connected in series. The normally open contact 1 of the relay KA is connected in parallel with the coil of the relay KA. The remote operation circuit includes the normally open contact 2 of the transfer switch SA and the normally open contact K1 of the PLC connected in series, and the normally open contact 2 of the relay KA is connected in parallel with the normally open contact K1 of the PLC; The normally open contact three of relay KA is connected in series with the solenoid valve.
5. A main flue damper device according to claim 3, characterized in that: The status indication circuit includes a fully open indication circuit and a fully closed indication circuit connected in parallel. The fully open indication circuit includes the normally open contact and the fully open indicator light of the limit switch 1 connected in series. The fully closed indication circuit includes the normally open contact and the fully closed indicator light of the limit switch 2 connected in series.
6. A main flue damper device according to claim 4, characterized in that: The PLC includes a CPU module, and the normally open contact K1 of the PLC is connected to the digital output port of the CPU module.
7. The main flue damper device according to claim 1, characterized in that: The air cylinder is connected to the gas storage tank through a pipeline, the control unit and the electromagnetic valve are arranged in the operation box, and the gas storage tank and the operation box are arranged on the ground.
8. The main flue damper device according to claim 1, characterized in that: The upper crossbeam is also provided with an electric hoist, and the gate plate is connected to the electric hoist through a steel wire rope.