Gas concentration monitoring ventilation system

Abstract

The utility model discloses a ventilation system for monitoring gas concentration. The ventilation system comprises an air inlet pipeline and an air outlet pipeline which are communicated with the inside and the outside of a roadway, and a plurality of ventilation systems which are arranged along the paths of the air inlet pipeline and the air outlet pipeline. According to the utility model, the separated second branch pipe is designed, the monitoring box is connected to the second branch pipe, the gas concentration monitoring instrument is arranged in the monitoring box, and because the second branch pipe is thin and negative pressure is formed at the connecting part of the second branch pipe and the first air pipe, gas in the first air pipe cannot enter the monitoring box; the detection result of the gas concentration monitoring instrument is influenced, the gas concentration information detected by the gas concentration monitoring instrument is reliable, the electric control throttling assembly is controlled according to the gas concentration information detected by the gas concentration monitoring instrument, more gas can be replaced at the position where the air exchange system is located, and the air exchange efficiency is improved. And the stable gas concentration is kept in the roadway.

Description

Technical Field

[0001] The utility model relates to the technical field of mine ventilation, in particular to a gas concentration monitoring ventilation system. Background Art

[0002] During the coal mining process, many tunnels will be built for the transportation of personnel and goods. The interior of the tunnel is relatively closed, so a ventilation system must be built to maintain the oxygen content in the air in the tunnel and reduce the concentration of gas.

[0003] Since local gas leakage is prone to occur at the mining face, causing the gas concentration inside the tunnel to exceed the safe range, it is necessary to install a gas concentration monitoring instrument in the tunnel. In the ventilation system inside the tunnel, multiple air exchange outlets are mostly connected in parallel in series or parallel. The gas concentration monitoring instrument installed on the ventilation duct cannot accurately monitor the gas concentration at a specific air exchange outlet. Therefore, it is necessary to develop a gas concentration monitoring ventilation system. Summary of the invention

[0004] In order to solve the above shortcomings and deficiencies of the prior art, the purpose of the utility model is to provide a gas concentration monitoring ventilation system.

[0005] The technical solution of the utility model is:

[0006] A gas concentration monitoring ventilation system, comprising:

[0007] Air inlet and outlet pipes connecting the inside and outside of the tunnel;

[0008] An air exchange system, wherein the air exchange system is provided with a plurality of air exchange systems along the paths of the air inlet duct and the air outlet duct;

[0009] The air exchange system comprises:

[0010] A first air duct, the first air duct is arranged in series in the air inlet pipeline, the first air duct has a thin pipe section and a thick pipe section, the gas inside the first air duct flows from the thin pipe section to the thick pipe section, the thick pipe section is provided with an air inlet assembly, a second branch pipe is provided on the transition surface between the thin pipe section and the thick pipe section, a monitoring box is fixedly installed on the second branch pipe, an air inlet is provided on the side of the monitoring box, and a gas concentration monitoring instrument is installed inside the monitoring box;

[0011] A second air duct, the second air duct is arranged in series on the air outlet duct, the second air duct is provided with an air outlet component, and the air outlet component has an electronically controlled throttling component for controlling the size of the air outlet cross section;

[0012] A controller is used to receive gas concentration data detected by a gas concentration monitoring instrument, and control the operation of the electronically controlled throttling component according to the received gas concentration data detected by the gas concentration monitoring instrument.

[0013] Preferably, it also includes: an external air exchange box constructed outside the tunnel, the external air exchange box has an air inlet box and an air outlet box, one end of the air inlet pipeline is connected to the external air exchange box, and one end of the air outlet pipeline is connected to the air outlet box.

[0014] Preferably, a first fan is installed on the air inlet duct and close to the external air exchange box, and a second fan is installed on the air outlet duct and close to the external air exchange box.

[0015] Preferably, the air inlet assembly comprises:

[0016] A third branch pipe, the top end of which is fixedly connected to the thick pipe section;

[0017] A filter box, wherein the interface of the filter box is fixedly installed with the third branch pipe, and an air inlet is arranged at the bottom of the filter box;

[0018] A suspension rod, the bottom end of which is fixedly connected to the filter box, and the top of which is fixedly connected to the top of the tunnel.

[0019] Preferably, a one-way valve is installed on the third branch pipe.

[0020] Preferably, the air outlet assembly includes:

[0021] An air outlet shell is provided with an air inlet on the side of the air outlet shell, and the top of the air outlet shell is connected to the second air duct through a first branch pipe, and an electric control throttling component is installed on the first branch pipe.

[0022] Preferably, the thin tube section and the thick tube section are integrally formed.

[0023] The beneficial effect of the utility model is as follows: compared with the prior art, the utility model, by designing a second branch pipe and connecting a monitoring box to the second branch pipe, a gas concentration monitoring instrument is installed inside the monitoring box. Since the second branch pipe is thinner and a negative pressure is formed at the portion where the second branch pipe is connected to the first air duct, the gas inside the first air duct will not enter the monitoring box and affect the detection result of the gas concentration monitoring instrument, so that the gas concentration information detected by the gas concentration monitoring instrument is more reliable, and the electronically controlled throttling component is controlled according to the gas concentration information detected by the gas concentration monitoring instrument, so that more gas can be replaced at the location of the air exchange system, thereby maintaining a stable gas concentration in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the utility model;

[0025] Figure 2 It is a three-dimensional schematic diagram of a certain air exchange outlet in the utility model;

[0026] Figure 3 It is a three-dimensional schematic diagram of a certain air exchange outlet in the utility model.

[0027] Legend:

[0028] 1. External air exchange box; 101. Air inlet box; 102. Air outlet box; 2. First fan; 3. Air inlet duct; 4. Second fan; 5. Air outlet duct; 6. Air exchange system; 601. First air duct; 601a. ​​Thick pipe section; 601b. Thin pipe section; 602. Second air duct; 603. First branch pipe; 604. Air outlet housing; 605. Electric throttling assembly; 606. Second branch pipe; 607. Monitoring box; 608. Gas concentration monitoring instrument; 609. Third branch pipe; 6010. Filter box; 6011. Suspension rod. DETAILED DESCRIPTION

[0029] The utility model is further introduced below in conjunction with the accompanying drawings and specific embodiments:

[0030] refer to Figures 1 to 3 A gas concentration monitoring ventilation system includes: an air inlet pipeline 3 and an air outlet pipeline 5 connecting the inside and outside of the tunnel, and multiple air exchange systems 6 installed along the path of the air inlet pipeline 3 and the air outlet pipeline 5. The air exchange system 6 is located inside the tunnel and is used to absorb part of the gas in the tunnel and fill it with fresh air to ensure the oxygen content inside the tunnel and reduce the gas concentration inside the tunnel.

[0031] Specifically, the air exchange system 6 includes: a first air duct 601, an air inlet component, a monitoring box 607, a gas concentration monitoring instrument 608, a second air duct 602, an air outlet component and a controller.

[0032] The first air duct 601 is arranged in series in the air inlet pipeline 3. The first air duct 601 has a thin tube section 601b and a thick tube section 601a. ​​The gas inside the first air duct 601 flows from the thin tube section 601b toward the thick tube section 601a. ​​During the flow, negative pressure is formed on the transition surface between the thin tube section 601b and the thick tube section 601a. ​​A second branch pipe 606 is arranged on the transition surface between the thin tube section 601b and the thick tube section 601a. ​​A monitoring box 607 is fixedly installed on the second branch pipe 606. An air inlet is arranged on the side of the monitoring box 607. The negative pressure formed above will make the gas inside the tunnel enter the monitoring box 607. A gas concentration monitoring instrument 608 is installed inside the monitoring box 607. The gas concentration monitoring instrument 608 is used to detect the gas entering the monitoring box 607. The gas concentration of the internal gas is controlled by a negative pressure at the connection portion between the second branch pipe 606 and the first air duct 601, thereby preventing the airflow inside the first air duct 601 from entering the monitoring box 607 and affecting the detection result of the gas concentration monitoring instrument 608. The thick pipe section 601a is provided with an air inlet assembly for extracting air inside the tunnel; the second air duct 602 is serially arranged on the air outlet pipeline 5, and the second air duct 602 is provided with an air outlet assembly, which has an electronically controlled throttling assembly 605 for controlling the size of the air outlet cross-section, and the controller is used to receive the gas concentration data detected by the gas concentration monitoring instrument 608, and control the operation of the electronically controlled throttling assembly 605 according to the received gas concentration data detected by the gas concentration monitoring instrument 608.

[0033] When the system is in operation, the amount of fresh air charged into the location is controlled according to the gas concentration data detected by the gas concentration monitoring instrument 608; for example, when the gas concentration is low, the controller controls the electric control throttling component 605 to be at the minimum opening (under this opening, the ventilation volume can be maintained so that the oxygen concentration at the location will not decrease); when the gas concentration is high, the controller controls the opening of the electric control throttling component 605 to gradually increase (the higher the gas concentration, the larger the opening), so that more fresh gas is charged into the location, thereby being able to dilute the gas concentration in the tunnel.

[0034] In one embodiment, it also includes: an external air exchange box 1 constructed outside the tunnel, the external air exchange box 1 has an air inlet box 101 and an air outlet box 102, one end of the air inlet duct 3 is connected to the external air exchange box 1, and one end of the air outlet duct 5 is connected to the air outlet box 102; a first fan 2 is installed on the air inlet duct 3 and close to the external air exchange box 1, and a second fan 4 is installed on the air outlet duct 5 and close to the external air exchange box 1.

[0035] When the first fan 2 is working, the gas inside the tunnel is extracted and discharged to the outside from the air inlet box 101. When the second fan 4 is working, the external gas enters the air outlet box 102, then enters the air outlet pipe 5, and is blown out in the tunnel.

[0036] In one embodiment, the air inlet assembly includes: a third branch pipe 609 , a filter box 6010 and a suspension rod 6011 .

[0037] The top of the third branch pipe 609 is fixedly connected to the thick pipe section 601a, the interface of the filter box 6010 is fixedly installed with the third branch pipe 609, the bottom of the filter box 6010 is provided with an air inlet, the bottom end of the suspension rod 6011 is fixedly connected to the filter box 6010, and the top of the suspension rod 6011 is fixedly connected to the top of the tunnel.

[0038] The filter box 6010 is fixed by the hanging rod 6011. The gas inside the tunnel enters the filter box 6010, is filtered, flows through the third branch pipe 609 and enters the air inlet pipeline 3, and then follows the air flow to be discharged from the air inlet box 101 to the outside of the tunnel.

[0039] In one embodiment, a one-way valve is installed on the third branch pipe 609 to prevent the gas in the air inlet pipeline 3 from flowing back through the third branch pipe 609 and entering the filter box 6010 .

[0040] In one embodiment, the air outlet component includes: an air outlet housing 604 and an electronically controlled throttling component 605 .

[0041] An air inlet is arranged on the side of the air outlet shell 604, and the top of the air outlet shell 604 is connected to the second air duct 602 through the first branch pipe 603, and an electric-controlled throttling component 605 is installed on the first branch pipe 603. The electric-controlled throttling component 605 can select a throttling valve suitable for pipeline installation or an electric-controlled gate valve.

[0042] In one embodiment, the thin tube segment 601b and the thick tube segment 601a are integrally formed, and a transitional cone portion is formed between the thin tube segment 601b and the thick tube segment 601a.

[0043] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A gas concentration monitoring ventilation system, comprising: An air inlet pipeline (3) and an air outlet pipeline (5) connecting the inside and outside of the tunnel; It is characterized by further comprising: an air exchange system (6), wherein a plurality of the air exchange systems (6) are arranged along the paths of the air inlet pipeline (3) and the air outlet pipeline (5); The ventilation system (6) comprises: A first air duct (601), the first air duct (601) being arranged in series in an air inlet pipeline (3), the first air duct (601) comprising a thin tube section (601b) and a thick tube section (601a), the gas inside the first air duct (601) flowing from the thin tube section (601b) toward the thick tube section (601a), the thick tube section (601a) being provided with an air inlet assembly, a second branch pipe (606) being provided on a transition surface between the thin tube section (601b) and the thick tube section (601a), a monitoring box (607) being fixedly mounted on the second branch pipe (606), an air inlet being provided on a side of the monitoring box (607), and a gas concentration monitoring instrument (608) being installed inside the monitoring box (607); A second air duct (602), the second air duct (602) being arranged in series on the air outlet pipeline (5), the second air duct (602) being provided with an air outlet component, the air outlet component having an electronically controlled throttling component (605) for controlling the size of the air outlet cross section; A controller is used to receive gas concentration data detected by a gas concentration monitoring instrument (608), and control the operation of the electronically controlled throttling component (605) according to the received gas concentration data detected by the gas concentration monitoring instrument (608).

2. The gas concentration monitoring ventilation system according to claim 1, characterized in that: Also includes: An external air exchange box (1) is constructed outside the tunnel, the external air exchange box (1) comprising an air inlet box (101) and an air outlet box (102), one end of the air inlet pipeline (3) is connected to the external air exchange box (1), and one end of the air outlet pipeline (5) is connected to the air outlet box (102).

3. The gas concentration monitoring ventilation system according to claim 2, characterized in that: A first fan (2) is installed on the air inlet pipeline (3) and close to the external air exchange box (1), and a second fan (4) is installed on the air outlet pipeline (5) and close to the external air exchange box (1).

4. The gas concentration monitoring ventilation system according to claim 1, characterized in that: The air inlet assembly comprises: A third branch pipe (609), the top end of which is fixedly connected to the thick pipe section (601a); A filter box (6010), wherein an interface of the filter box (6010) is fixedly mounted to the third branch pipe (609), and an air inlet is provided at the bottom of the filter box (6010); A suspension rod (6011), wherein the bottom end of the suspension rod (6011) is fixedly connected to the filter box (6010), and the top of the suspension rod (6011) is fixedly connected to the top of the tunnel.

5. The gas concentration monitoring ventilation system according to claim 4, characterized in that: A one-way valve is installed on the third branch pipe (609).

6. The gas concentration monitoring ventilation system according to claim 1, characterized in that: The air outlet component comprises: An air outlet shell (604), wherein an air inlet is arranged on the side of the air outlet shell (604), and the top of the air outlet shell (604) is connected to the second air duct (602) via a first branch pipe (603), and an electric-controlled throttling component (605) is installed on the first branch pipe (603).

7. The gas concentration monitoring ventilation system according to claim 1, characterized in that: The thin tube section (601b) and the thick tube section (601a) are integrally formed.

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