CN212058349U

CN212058349U - Explosion-proof type underground flue

Info

Publication number: CN212058349U
Application number: CN202020731029.8U
Authority: CN
Inventors: 丁嘉奎; 黄亿万
Original assignee: Mianyang Tongxin Copper Industry Co ltd
Current assignee: Mianyang Tongxin Copper Industry Co ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2020-12-01
Anticipated expiration: 2030-05-07

Abstract

The utility model discloses an explosion-proof underground flue, which comprises a flue body, wherein the flue body comprises a first transverse section, a first vertical section, a second transverse section and a second vertical section which are connected in sequence, and a combustible gas detector, an infrared detector and a nitrogen release device are arranged on the first transverse section; the nitrogen release device comprises a nitrogen container and a nitrogen pipeline, an electromagnetic valve is arranged on the nitrogen pipeline, a nitrogen release port is arranged on the first transverse section, and the nitrogen pipeline is communicated with the nitrogen release port; an explosion venting pipeline and an explosion venting sheet are arranged on the first vertical section, and a one-way explosion-proof valve is arranged on the second transverse section; a control system is also arranged; the combustible gas of the underground flue can be detected, then the leaked combustible gas is inerted through nitrogen release, so that the possibility of explosion of the underground flue is reduced, finally, the explosion influence is reduced for the explosion condition through the explosion venting and explosion-proof device, the operation safety of the underground flue is ensured to the maximum extent, and the occurrence rate of explosion accidents is greatly reduced.

Description

Explosion-proof type underground flue

Technical Field

The utility model relates to a metal smelting equipment technical field especially relates to an explosion-proof type underground flue.

Background

In the waste copper recovery smelting equipment, an underground flue is often required to be arranged. Traditional underground flue is thoughtlessly built by the brick and is formed, and the bottom is straight, and the head is domes, directly links to each other with outside environmental protection dust collecting equipment, takes out from the stove because of having a large amount of high temperature flue gases in the smelting process, adopts underground flue can effectively resist the harm of high temperature to the flue, and underground flue entry rear end is provided with lets out the explosion mouth, and the tradition lets out the explosion mouth and adopts movable steel sheet form, and when inside when exploding, the movable explosion mouth of letting out is strikeed and is opened. Such underground flue is difficult to monitor and restrain the concentration of inside combustible gas such as carbon monoxide and natural gas, can lead to the combustible gas concentration to reach the flame that draws out after the explosion limit and ignite and explode, and the explosion vent sets up inside the workshop, can lead to injury accident to take place after the explosion, and the explosion shock wave passes through the flue and explodes and give environmental protection dust collecting equipment, also produces harm to environmental protection dust collecting equipment.

Disclosure of Invention

An object of the utility model is to provide an explosion-proof type underground flue to solve above-mentioned problem.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the flue body of the explosion-proof type underground flue comprises a first transverse section, a first vertical section, a second transverse section and a second vertical section which are sequentially connected, wherein a combustible gas detector, an infrared detector and a nitrogen release device are arranged on the first transverse section; the nitrogen release device comprises a nitrogen container and a nitrogen pipeline connected with the nitrogen container, an electromagnetic valve is arranged on the nitrogen pipeline, at least two nitrogen release ports are arranged on the first transverse section, and the other end of the nitrogen pipeline is communicated with the nitrogen release ports; the wind speed detector is positioned at the front ends of the combustible gas detector and the infrared detector; the first vertical section is provided with an explosion venting sheet, an explosion venting pipeline is arranged outside the explosion venting sheet, and the second transverse section is provided with a one-way explosion-proof valve and an air valve; the control system is electrically connected with the combustible gas detector, the infrared detector, the wind speed detector, the electromagnetic valve, the one-way explosion-proof valve and the air valve.

As a preferred technical scheme: the combustible gas detectors and the infrared detectors are arranged at the same position in groups, and two groups of the combustible gas detectors and the infrared detectors are arranged together and are respectively located at the positions, close to the left end and the right end, of the first transverse section.

As a further preferable technical scheme: the nitrogen gas release ports are three in number and are equidistantly arranged between the two groups of combustible gas detectors and the infrared detectors.

As a preferred technical scheme: the combustible gas detection device is connected with the infrared detection device, and the audible and visual alarm device gives an alarm when the detection index of the combustible detection device exceeds the standard or when the combustible detection device and the infrared detection device simultaneously exceed the limit.

As a preferred technical scheme: the nitrogen gas releasing device is characterized by further comprising an acousto-optic alarm device, and the acousto-optic alarm device is electrically connected with the nitrogen gas releasing device.

As a preferred technical scheme: the explosion venting pipeline is straight towards the air and is not provided with a corner. Thereby ensuring better explosion venting effect.

As a preferred technical scheme: and an air valve linked with the one-way explosion-proof valve is also arranged on the second transverse section. The purpose is to prevent the equipment damage caused by unstable internal pressure intensity of the environmental protection equipment due to the sudden reduction of the air suction volume of the environmental protection air draft device after the action of the one-way explosion-proof valve; after the explosion happens, when the one-way explosion-proof valve acts, the air valve acts simultaneously, and when the air valve acts, the one-way explosion-proof valve does not act.

Compared with the prior art, the utility model has the advantages of: the utility model discloses a set up combustible gas detection instrument, nitrogen gas release, let out and explode device and flame proof device etc. can survey the combustible gas of underground flue, thereby carry out the inertization through nitrogen gas release to the combustible gas who leaks and reduce the possibility of underground flue explosion, reduce the explosion influence through letting out to explode the flame proof device to the condition of exploding at last and handle, the operation safety of underground flue has been guaranteed to the at utmost, greatly reduces the incidence of explosion accident.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the explosion venting conduit of FIG. 1;

fig. 3 is a schematic diagram of a circuit connection according to an embodiment of the present invention.

In the figure: 11. a first transverse segment; 12. a first vertical section; 13. a second transverse segment; 14. a second vertical section; 15. a nitrogen gas release port; 2. a combustible gas detector; 3. an infrared detector; 4. a wind speed detector; 51. a nitrogen container; 52. a nitrogen gas pipeline; 53. an electromagnetic valve; 6. venting an explosion pipeline; 7. explosion venting sheets; 8. a one-way explosion-proof valve; 9. a control system; 10. an air valve.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example (b):

referring to fig. 1, the explosion-proof type underground flue comprises a flue body, wherein the flue body comprises a first transverse section 11, a first vertical section 12, a second transverse section 13 and a second vertical section 14 which are connected in sequence,

the first transverse section 11 is provided with a combustible gas detector 2, an infrared detector 3, a wind speed detector 4 and a nitrogen release device; the nitrogen release device comprises a nitrogen container 51 and a nitrogen pipeline 52 connected with the nitrogen container 51, an electromagnetic valve 53 is arranged on the nitrogen pipeline, three nitrogen release ports 15 are arranged on the first transverse section 11, and the other end of the nitrogen pipeline 52 is communicated with the nitrogen release ports 15;

referring to fig. 2, an explosion venting sheet 7 is arranged on the first vertical section 12, an explosion venting pipeline 6 is arranged outside the explosion venting sheet 7, and the explosion venting pipeline 6 is communicated with the first vertical section 12; the total area of the explosion venting sheet 7 is not less than the cross sectional area of the first vertical section 12, the explosion venting pipeline 6 is connected and installed with the first vertical section 12 by adopting a steel material and adopting a welding and flange connection mode, the explosion venting pipeline 6 is straight and directed to the air, no corner is required, and the length is not more than 3 m;

the second transverse section 13 is provided with a one-way explosion-proof valve 8; in the embodiment, an air valve 10 is additionally arranged at the rear end of the one-way explosion-proof valve 8 and is linked with the one-way explosion-proof valve 8, so that the problem that the equipment is damaged due to unstable internal pressure of the environment-friendly equipment caused by sudden reduction of air suction volume of the environment-friendly air draft device after the action of the one-way explosion-proof valve 8 is solved; after the air valve 10 is assumed, when the one-way explosion-proof valve 8 acts, the air valve 10 acts simultaneously, and when the air valve 10 acts, the one-way explosion-proof valve does not act;

the device is further provided with a control system 9, as shown in fig. 3, the control system 9 is electrically connected with the combustible gas detector 2, the infrared detector 3, the wind speed detector 4, the electromagnetic valve 53, the one-way explosion-proof valve 8 and the air valve 10.

In this embodiment, the combustible gas detectors 2 and the infrared detectors 3 are arranged at the same positions in groups, and two groups are provided in total and are respectively located at positions of the first transverse section 11 close to the left and right ends;

in the embodiment, the number of the nitrogen gas release ports 15 is three, the three nitrogen gas release ports 15 are equidistantly arranged between the two groups of the combustible gas detectors 2 and the infrared detectors 3, and the distance between every two adjacent nitrogen gas release ports 15 is 4 m;

in this embodiment, the device further comprises an audible and visual alarm device, and the audible and visual alarm device is electrically connected with the combustible gas detector 2 and the nitrogen gas release device.

In the utility model, the combustible gas detector 2, the infrared detector 3, the wind speed detector 4, the one-way explosion-proof valve 8, the control system 9 and the like are the prior art known by the technicians in the field, and the detection instruments and the control instruments can be purchased from the market;

the control system 9 of the utility model, namely the program control equipment for controlling the normal operation of the system, the time of the device from detecting the action does not exceed 0.2 s; preferably, the high-temperature-resistant combustible gas detector 2 and the infrared detector 3 are arranged at the same position, are arranged at the front section 4m of the first nitrogen release port 15 and the rear section 4m of the last nitrogen release port 15 on the left, and can detect combustible gas such as carbon monoxide, natural gas and the like at high temperature, and the high-temperature resistance temperature is 200 ℃; the infrared detector 3 detects the instantaneous temperature difference, the gas explosion temperature is 1700 ℃, and the temperature difference between the gas explosion temperature and the normal operation of the underground flue is about 1500 ℃; the wind speed detector 4 is positioned at the front end 0.3m of the combustible gas detector 2 and the infrared detector 3, and the wind speed detector 4 detects the real-time wind speed (generally about 2 m/s) of the flue; nitrogen release device: when the combustible gas detector 2 detects that the concentration of carbon monoxide in the underground flue reaches 60% of the explosion limit concentration, the preferable electromagnetic valve 53 automatically selects one or more nitrogen release ports 15 according to the wind speed to open so as to inject nitrogen into the underground flue and inert the inside of the flue; the unidirectional explosion-proof valve 8 preferably adopts electromagnetic interlocking, and when receiving an electromagnetic signal, the electromagnetically attracted unidirectional explosion-proof valve 8 automatically falls down after the brake is switched off, and the brake switches off a pipeline; when the explosion venting sheet 7 reaches a certain pressure, the explosion venting sheet is damaged, the pressure is released from the explosion venting sheet, and the explosion shock wave is released towards the safe direction along the direction of an explosion venting pipeline; the sound and light alarm device comprises a detection alarm and a release alarm, wherein the detection alarm is an alarm when the detected concentration exceeds the standard and the explosion occurs, and the release alarm is a working alarm when the release device releases nitrogen and a fault alarm when the nitrogen pressure is insufficient.

Through the above arrangement, the utility model discloses can realize:

1. combustible gas detection and inerting:

combustible gas (carbon monoxide and natural gas) is accumulated in an underground flue, the combustible gas detector 2 detects that the concentration of the combustible gas exceeds 10% LEL and starts alarming, the wind speed detector 4 detects the real-time detection wind speed, the nitrogen gas release port 15 is selected according to the flowing condition of the wind speed to open and continuously release nitrogen gas and open a nitrogen gas working alarm, the rear-end combustible gas detection alarm is checked and judged again, if the concentration reaches below a safety threshold value, the nitrogen gas is stopped to be released, and if the concentration continuously exceeds 60% of the lower explosion limit, the nitrogen gas is continuously released;

2. gas explosion detection and explosion suppression:

whether explosion occurs or not is judged in two modes of temperature difference sensing of the infrared detector 3 and the combustible gas detector 2, if the underground flue explodes, explosion propagation and explosion suppression are prevented, alarm is started, nitrogen is released, working alarm is started, the one-way explosion-proof valve 8 horizontally arranged at the rear part is closed, the rear end air compensation device interlocked with the one-way explosion-proof valve 8 is opened, shock waves are flushed out from the explosion venting sheet 7, and explosion venting is carried out towards the safety direction along the explosion venting port.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an explosion-proof type underground flue, includes the flue body, its characterized in that: the flue body comprises a first transverse section, a first vertical section, a second transverse section and a second vertical section which are sequentially connected, and a combustible gas detector, an infrared detector and a nitrogen release device are arranged on the first transverse section; the nitrogen release device comprises a nitrogen container and a nitrogen pipeline connected with the nitrogen container, an electromagnetic valve is arranged on the nitrogen pipeline, at least two nitrogen release ports are arranged on the first transverse section, and the other end of the nitrogen pipeline is communicated with the nitrogen release ports; the wind speed detector is positioned at the front ends of the combustible gas detector and the infrared detector; the first vertical section is provided with an explosion venting sheet, an explosion venting pipeline is arranged outside the explosion venting sheet, and the second transverse section is provided with a one-way explosion-proof valve and an air valve; the control system is electrically connected with the combustible gas detector, the infrared detector, the wind speed detector, the electromagnetic valve, the one-way explosion-proof valve and the air valve.

2. An explosion-proof underground flue according to claim 1, characterized in that: the combustible gas detectors and the infrared detectors are arranged at the same position in groups, and two groups of the combustible gas detectors and the infrared detectors are arranged together and are respectively located at the positions, close to the left end and the right end, of the first transverse section.

3. An explosion proof type underground flue according to claim 2, wherein: the nitrogen gas release ports are three in number and are equidistantly arranged between the two groups of combustible gas detectors and the infrared detectors.

4. An explosion-proof underground flue according to claim 1, characterized in that: the device also comprises an acousto-optic alarm device which is electrically connected with the combustible gas detector and the infrared detector.

5. An explosion-proof underground flue according to claim 1, characterized in that: the nitrogen gas releasing device is characterized by further comprising an acousto-optic alarm device, and the acousto-optic alarm device is electrically connected with the nitrogen gas releasing device.

6. An explosion-proof underground flue according to claim 1, characterized in that: the explosion venting pipeline is straight towards the air and is not provided with a corner.

7. An explosion-proof underground flue according to claim 1, characterized in that: and an air valve linked with the one-way explosion-proof valve is also arranged on the second transverse section.