CN211011322U - Double-protection fire-proof device - Google Patents

Abstract

The utility model provides a double-protection fire protection device, which comprises a spile door, an actuating mechanism, a pressure monitoring component and a temperature monitoring component; the inserting plate door is controlled by the actuating mechanism and is used for opening or closing the blanking pipe; arranging the pressure monitoring part in the boiler; the temperature monitoring part is arranged on a feeding device at the inlet of the fuel into the boiler; and simultaneously transmitting the measured pressure signal and temperature signal to the actuating mechanism in real time to be used as control signals for controlling the inserting plate door. Through the utility model discloses no longer passive fire prevention, but can initiatively track the boiler behavior in real time, take fire prevention measure in advance according to the boiler abnormal conditions initiative to the problem of mechanical fire prevention mechanism inefficacy caused because fuel blocks up blanking pipe has been solved effectively.

Description

Double-protection fire-proof device

Technical Field

The utility model relates to a duplicate protection fire protection device.

Background

When the boiler normally operates, the interior of the boiler is in a micro negative pressure state, namely the pressure in the boiler is slightly less than the atmospheric pressure. Therefore, the flue gas in the furnace can not leak out of the furnace. However, when the fuel bearing part of the biomass grate-firing boiler vibrates, a transient positive pressure state occurs in the boiler. The smoke and even flame in the furnace can escape outwards under the positive pressure state, and particularly when the smoke and even flame escape outwards from a fuel inlet, the smoke and even flame can ignite a stokehold feeder, a blanking pipe in front of the feeder and even a feeding belt, so that serious production accidents and huge economic losses are caused. Reliable fire protection must be provided in the stokehole feeding system.

As shown in fig. 1, in the prior art, fuel falls from a drop tube into a stokehole feeder, which pushes the fuel into a boiler for combustion. The fuel flow is indicated by the arrow in the figure.

In the prior fire prevention technology, a mechanical anti-backfire device is arranged between a blanking pipe and a stokehole feeder. The disadvantages are that:

① the mechanical device has a large gap between the moving part and the static part, and has poor fire-proof tightness.

② is automatically fireproof by simple mechanical structure without adjustable ability and ability to track the running state of boiler in real time.

③ when the fuel is fully blocked in the blanking pipe, the action of the mechanical device moving part (such as a turning plate) is limited, and the mechanical device moving part can not automatically return to a closed state, so that the mechanical device cannot play a role of fire prevention, the reliability is poor, and the potential safety hazard is great.

Therefore, how to provide a dual protection fire protection device to solve the above difficulties is a problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a double-protection fire-proof device, aiming at the defects of the prior art, which comprises a spile door, an actuating mechanism, a pressure monitoring part and a temperature monitoring part; wherein the content of the first and second substances,

the inserting plate door is controlled by the actuating mechanism and is used for opening or closing the blanking pipe;

arranging the pressure monitoring part in the boiler;

the temperature monitoring part is arranged on a feeding device at the inlet of the fuel into the boiler;

and simultaneously transmitting the measured pressure signal and temperature signal to the actuating mechanism in real time to be used as control signals for controlling the inserting plate door.

Preferably, when a pressure value of positive pressure occurring in the boiler reaches a threshold value, the pressure value is measured by the pressure monitoring component, a pressure signal is transmitted to the actuating mechanism, and the actuating mechanism drives the inserting plate door to close a part of the blanking port.

Preferably, if the temperature monitoring part also detects that the temperature reaches the threshold value, the actuator drives the inserting plate door to completely close the blanking pipe under the control of the temperature signal.

Preferably, the pressure monitoring part is provided in plurality, and the temperature monitoring part is provided in plurality.

Preferably, the actuating mechanism is a pneumatic actuating mechanism, and the inserting plate door is a pneumatic inserting plate door.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model provides a duplicate protection firebreak device, no longer passive fire prevention, but can initiatively track boiler behavior in real time, take fire prevention measure in advance according to the boiler abnormal conditions initiative.

2. The utility model provides a duplicate protection firebreak device can close partly blanking passageway earlier according to pressure signal, according to temperature signal decide again whether totally closed to produce frequent action and maloperation.

3. The utility model provides a duplicate protection firebreak device, its actuating mechanism is fast, and drive power is big, can react according to the condition fast.

To sum up, the utility model provides a duplicate protection firebreak device has solved present stokehold feed system firebreak device and can only prevent fires passively, can not predict in advance whether can the problem of conflagration risk takes place, has solved present stokehold feed system firebreak device and can cause the problem that mechanical fire prevention mechanism became invalid because fuel blocks up blanking pipe.

Drawings

Fig. 1 is a schematic diagram of the prior art.

Fig. 2 is a schematic view of the dual-protection fire protection device according to the present invention in an open state.

Fig. 3 is a schematic view of the dual-protection fire protection device provided by the present invention in a closed state.

The method comprises the following steps of 1-a board inserting door, 2-an actuating mechanism, 3-a pressure monitoring part, 4-a temperature monitoring part, 5-a blanking pipe and 6-feeding equipment.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

As shown in fig. 2 and 3, the utility model provides a double protection fire protection device, which is characterized in that the device comprises a spile door 1, an actuating mechanism 2, a pressure monitoring component 3 and a temperature monitoring component 4; the inserting plate door 1 is controlled by the actuating mechanism 2 and is used for opening or closing the blanking pipe 5; arranging the pressure monitoring part 3 in the boiler; said temperature monitoring means 4 are arranged on the feeding device 6 of the fuel entering the boiler inlet; and meanwhile, transmitting the measured pressure signal and temperature signal to the actuating mechanism 2 in real time to be used as control signals for controlling the inserting plate door 1.

Preferably, when the pressure value of the positive pressure occurring in the boiler reaches a threshold value, the pressure value is measured by the pressure monitoring part 3, a pressure signal is transmitted to the actuating mechanism 2, and the actuating mechanism 2 drives the inserting plate door 1 to close a part of the blanking port 5.

Preferably, if the temperature monitoring part 4 also detects that the temperature has reached the threshold value, the actuator 2 drives the gate 1 to close the down pipe 5 completely under the control of the temperature signal.

Preferably, the number of the pressure monitoring parts 3 is plural, and the number of the temperature monitoring parts 4 is plural.

Preferably, the actuator 2 is a pneumatic actuator, and the inserting plate door 1 is a pneumatic inserting plate door.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model provides a duplicate protection firebreak device, no longer passive fire prevention, but can initiatively track boiler behavior in real time, take fire prevention measure in advance according to the boiler abnormal conditions initiative.

2. The utility model provides a duplicate protection firebreak device can close partly blanking passageway earlier according to pressure signal, according to temperature signal decide again whether totally closed to produce frequent action and maloperation.

3. The utility model provides a duplicate protection firebreak device, its actuating mechanism is fast, and drive power is big, can react according to the condition fast.

To sum up, the utility model provides a duplicate protection firebreak device has solved present stokehold feed system firebreak device and can only prevent fires passively, can not predict in advance whether can the problem of conflagration risk takes place, has solved present stokehold feed system firebreak device and can cause the problem that mechanical fire prevention mechanism became invalid because fuel blocks up blanking pipe.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.

Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It will be apparent to those skilled in the art that various changes and modifications may be made to the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (3)

1. A double-protection fireproof device is characterized by comprising a plug board door, an actuating mechanism, a pressure monitoring component and a temperature monitoring component; wherein the content of the first and second substances,

the inserting plate door is controlled by the actuating mechanism and is used for opening or closing the blanking pipe;

arranging the pressure monitoring part in the boiler;

the temperature monitoring part is arranged on a feeding device at the inlet of the fuel into the boiler;

and simultaneously transmitting the measured pressure signal and temperature signal to the actuating mechanism in real time to be used as control signals for controlling the inserting plate door.

2. A double-protection fire protection device according to claim 1, wherein the number of the pressure monitoring parts is plural, and the number of the temperature monitoring parts is plural.

3. A dual protection fire-protection arrangement according to claim 1, wherein the actuator is a pneumatic actuator and the gate is a pneumatic gate.

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