Nitrogen fire-fighting device of scraper conveyor

Abstract

The nitrogen fire-fighting device of the scraper conveyor comprises a protective cover and a nitrogen cylinder which are arranged on the scraper conveyor in a covering mode, a feeding port and a discharging port are formed in the protective cover, a plurality of air inlets are formed in the upper portion of the protective cover, and air inlet covers are arranged on the air inlets through ventilation rings. A gas distribution pipe of a cross-shaped four-way pipe structure is arranged on the gas inlet cover, a plurality of gas distribution holes are formed in the gas distribution pipe, and the input end of the gas distribution pipe is connected with a nitrogen cylinder through a gas guide pipe with an electromagnetic valve. And breathable fiber cloth is distributed on the breathable ring. By adopting the cross-shaped four-way pipe structure, the nitrogen can be uniformly and quickly guided in by utilizing the plurality of gas distribution holes in the gas distribution pipe, the direct impact of the nitrogen on materials can be reduced by utilizing the ventilation ring, and meanwhile, the nitrogen can be uniformly and quickly guided in by utilizing the ventilation ring. Part of nitrogen with large impact pressure is reflected through the breathable fiber cloth on the breathable ring so as to reduce direct impact on materials, and the situation that airflow directly impacts the materials on conveying equipment, and consequently the materials are splashed is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of safe material transportation, and more specifically, to a nitrogen fire-fighting device for a scraper conveyor. Background Art

[0002] Scraper conveyors are used to transport bulk materials. The scrapers in the machine body are used to transport the materials entering the machine body from the feed port at the rear of the machine to the discharge port at the front of the machine. They are widely used in many fields such as electricity, metallurgy, and chemical industry. For materials with high temperature, low ignition point, and volatile flammable gas, the friction during transportation in the scraper conveyor will cause oxidation reaction with the air in the machine body, which may cause the risk of spontaneous combustion of the materials and require new fire-fighting equipment.

[0003] In view of the above problems, in the Chinese patent publication CN101913485B-gasification special airtight buried scraper conveyor, the problems existing in the screw conveyor in the prior art are overcome, and the airtight buried scraper conveying method is adopted. 2 and H 2 O online analyzer, control O 2 When the nitrogen content (<8%) and dew point exceed the standard, low-pressure nitrogen is added to the system, solving the efficiency and reliability problems in long-distance transportation.

[0004] However, the current low-pressure nitrogen supplementation can easily cause disturbance of the fly ash when no nitrogen is added, thus affecting its transmission.

[0005] Therefore, it is necessary to propose a nitrogen fire-fighting device for a scraper conveyor, which can effectively reduce the problem of material splashing in the equipment and incomplete air exhaust caused by the introduction of nitrogen. Utility Model Content

[0006] The utility model provides a nitrogen fire-fighting device for a scraper conveyor, so as to solve the problem that the existing nitrogen introduction easily causes disturbance and splashing of conveyed materials, affecting the transmission thereof.

[0007] According to one aspect of the utility model, a nitrogen fire-fighting device for a scraper conveyor is provided, comprising a protective cover and a nitrogen bottle arranged on the scraper conveyor, the protective cover being provided with a feed port and a discharge port, a plurality of air inlets being provided on the upper portion of the protective cover, an air inlet cover being provided on the air inlet via an air permeable ring, an air distribution pipe in a cross-shaped four-way pipe structure being provided on the air inlet cover, a plurality of air distribution holes being provided on the air distribution pipe, an input end of the air distribution pipe being connected to a nitrogen bottle via an air guide pipe with an electromagnetic valve; a breathable fiber cloth is provided on the air permeable ring.

[0008] Preferably, based on the above solution, the air distribution pipe is connected to the air guide pipe via a reducer, and the diameter of the reducer is truncated cone-shaped.

[0009] Preferably, based on the above solution, a solenoid valve is installed on the air guide pipe.

[0010] Preferably, based on the above solution, a thermocouple and a gas detector are installed on the protective cover.

[0011] Preferably, based on the above solution, the scraper conveyor is arranged horizontally.

[0012] Preferably, based on the above scheme, the scraper conveyor includes a driving wheel, a motor, a passive wheel and a chain, the driving wheel is drivingly connected to the motor, the driving wheel and the passive wheel are connected by a chain transmission, and a scraper is arranged on the chain.

[0013] Preferably, based on the above scheme, the air permeable ring is a dense-mesh fiber structure, and the circumferential openings of the air permeable ring are mounted on the air inlet of the protective cover through fasteners.

[0014] The utility model discloses a nitrogen fire-fighting device for a scraper conveyor. By adopting a cross-shaped four-way pipe structure and utilizing a plurality of air distribution holes on the air distribution pipe, nitrogen can be introduced evenly and quickly. A breathable ring can be utilized to reduce direct impact on materials. At the same time, part of the nitrogen with a large impact pressure is reflected through the breathable fiber cloth on the breathable ring to reduce direct impact on materials, thereby preventing airflow from directly impacting materials on the conveying equipment and causing splashing of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a nitrogen fire-fighting device for a scraper conveyor according to the utility model;

[0017] Figure 2 This is an installation diagram of the air intake hood of the utility model;

[0018] Figure 3 It is the shape diagram outside the breathable ring of the utility model;

[0019] Description of Figure Numbers:

[0020] Scraper conveyor 1, protective cover 2, feed port 21, discharge port 22, nitrogen bottle 3, air ring 4, breathable fiber cloth 41, air inlet cover 5, air distribution pipe 51, air distribution hole 52, solenoid valve 53, air guide pipe 54, reducer 55, thermocouple 6, gas detector 7. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0023] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0024] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0025] In the embodiments shown in the drawings, the directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the positions of the components changes, the directions also change accordingly.

[0026] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0028] See also Figure 1 , and combined with Figure 2 and Figure 3As shown, a nitrogen fire-fighting device for a scraper conveyor of the utility model comprises a protective cover 2 and a nitrogen bottle 3 which are arranged on the scraper conveyor 1, and a feed port 21 and a discharge port 22 are arranged on the protective cover 2, wherein the feed port 21 is used to introduce materials to be transferred onto the scraper conveyor 1, and the discharge port 22 is used to discharge materials to be transferred onto the scraper conveyor 1.

[0029] Specifically, the upper part of the protective cover 2 is provided with a plurality of air inlets to realize the introduction of nitrogen, wherein the air inlet is equipped with an air inlet hood 5 through a breathable ring 4, and the air inlet hood 5 is equipped with an air distribution pipe 51 with a cross-shaped four-way pipe structure, and a plurality of air distribution holes 52 are provided on the air distribution pipe 51, the air distribution pipe 51 is connected to the nitrogen bottle 3 through an air guide pipe 54 with a solenoid valve 53, and a breathable fiber cloth 41 is distributed on the breathable ring 4.

[0030] During operation, the scraper conveyor 1 works, and the feed port 21 guides the material onto the scraper conveyor 1. Through the operation of the scraper conveyor 1, the material is driven to be transported to the discharge port 22 to realize its transportation; at the same time, the nitrogen bottle 3 connects the air guide pipe 54 through the solenoid valve 53, and the nitrogen is transported to the air distribution pipe 51, and is output into the air intake hood 5 through the air distribution holes 52 on the air distribution pipe 51. Part of the nitrogen directly passes through the breathable fiber cloth to reduce its impact force, while part of the nitrogen is reflected into the air intake hood 5 under the action of the breathable fiber cloth 41, and then gradually diffuses onto the breathable fiber cloth 41, and is gradually introduced into the protective cover 2 through the cloth holes on the breathable fiber cloth 41, thereby taking away excess heat, reducing the material temperature to prevent spontaneous combustion, and removing the air in the machine body to extinguish the spontaneously combusted material.

[0031] It should be noted that the gas distribution pipe 51 of the utility model is connected to the air guide pipe 54 through a reducer 55. The diameter of the reducer 55 is set in a truncated cone shape, which can reduce the impact force of the introduction of nitrogen. Preferably, a solenoid valve is also installed on the air guide pipe 54 to further safely control the opening and closing of the nitrogen.

[0032] Among them, the protective cover 2 is equipped with a thermocouple 6 and a gas detector 7, that is, the temperature inside the scraper conveyor 1 can be controlled by the thermocouple 6, and the combustible gas content in the protective cover 2 can be monitored by the gas detector 7, and the scraper conveyor 1 is arranged horizontally.

[0033] It should be noted that the scraper conveyor 1 includes a driving wheel, a motor, a driven wheel and a chain. The driving wheel is drivingly connected to the motor, the driving wheel and the driven wheel are connected via a chain transmission, and a scraper is provided on the chain.

[0034] Furthermore, the breathable ring 4 of the present invention is a dense-mesh fiber structure, and the circumferential openings of the breathable ring 4 are mounted on the air inlet of the protective cover 2 through fasteners.

[0035] The utility model discloses a nitrogen fire-fighting device for a scraper conveyor. By adopting a cross-shaped four-way pipe structure and utilizing a plurality of air distribution holes 52 on an air distribution pipe 51, nitrogen can be introduced evenly and quickly. By utilizing an air permeable ring 4, direct impact of nitrogen on materials can be reduced. At the same time, part of nitrogen with a large impact pressure is reflected through the air permeable fiber cloth 41 on the air permeable ring 4 to reduce direct impact on materials, thereby preventing airflow from directly impacting materials on the conveying equipment and causing splashing of materials.

[0036] Finally, the method of this application is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A nitrogen fire-fighting device for a scraper conveyor, characterized in that: It comprises a protective cover and a nitrogen bottle which are arranged on a scraper conveyor, wherein the protective cover is provided with a feed port and a discharge port, a plurality of air inlets are arranged on the upper part of the protective cover, an air inlet cover is arranged on the air inlet through a breathable ring, an air distribution pipe with a cross-shaped four-way pipe structure is arranged on the air inlet cover, a plurality of air distribution holes are arranged on the air distribution pipe, an input end of the air distribution pipe is connected to a nitrogen bottle through an air guide pipe with a solenoid valve; a breathable fiber cloth is arranged on the breathable ring.

2. A nitrogen fire fighting device for a scraper conveyor as claimed in claim 1, characterized in that: The air distribution pipe is connected with the air guide pipe through a reducer, and the diameter of the reducer is set in a truncated cone shape.

3. A nitrogen fire fighting device for a scraper conveyor as claimed in claim 1, characterized in that: A solenoid valve is arranged on the air guide pipe.

4. A nitrogen fire fighting device for a scraper conveyor as claimed in claim 1, characterized in that: The protective cover is equipped with a thermocouple and a gas detector.

5. A nitrogen fire fighting device for a scraper conveyor as claimed in claim 1, characterized in that: The scraper conveyor is arranged horizontally.

6. A nitrogen fire fighting device for a scraper conveyor as claimed in claim 1, characterized in that: The scraper conveyor comprises a driving wheel, a motor, a driven wheel and a chain. The driving wheel is drivingly connected to the motor. The driving wheel and the driven wheel are connected via a chain transmission, and a scraper is arranged on the chain.

7. A nitrogen fire fighting device for a scraper conveyor as claimed in claim 1, characterized in that: The air permeable ring is a dense fiber structure, and the circumferential openings of the air permeable ring are mounted on the air inlet of the protective cover through fasteners.

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