A remote automatic grading pneumatic control type gas emission device

Abstract

The present invention belongs to the technical field of coal mine ventilation. It relates to a remotely automatic hierarchical pneumatic control type gas emission device, which includes a gas emitter with both ends respectively connected to air ducts; a number of air discharge ports are provided on the side wall of the gas emitter, and a pneumatic opening and closing mechanism is provided on each air discharge port; the two ends of the gas emitter are respectively an air outlet and an air inlet, and the fresh air flow in the air duct is introduced into the gas emitter from the air inlet and is controlled by shunting through the air discharge ports, so as to control the air volume at the air outlet. The present invention has the function of hierarchical gas emission. The gas emitter is directly installed between two air ducts close to the gas gushing surface. The fresh air flow flows in from the upper air duct, flows out to the lower flexible air duct after passing through the gas emitter, and the air flow performs hierarchical air discharge through the air discharge ports on the gas emitter, so as to control the air volume entering the gas gushing surface, realize the hierarchical control and emission of the gushing gas, avoid gas overrun, and improve the safety of gas emission.

Description

Technical Field

[0001] The present invention belongs to the technical field of coal mine ventilation and relates to a remotely automatic hierarchical pneumatic control type gas emission device. Background Technique

[0002] Safe and efficient gas emission is a necessary means to ensure safe production in coal mines. The "Coal Mine Safety Regulations" stipulate that in case the local ventilator stops running due to reasons, before resuming ventilation, it is necessary to first check the gas. Only when the highest gas concentration in the stopped ventilation area does not exceed 1.0%, and the gas concentration in the air flow within 10 m near the local ventilator and its switch does not exceed 0.5%, can the local ventilator be manually started to resume normal ventilation. When the gas concentration in the stopped ventilation area exceeds 1.0% and the highest gas concentration does not exceed 3.0%, safety measures must be taken to control the air flow to discharge gas. When the methane concentration in the stopped ventilation area exceeds 3.0%, safety measures for gas emission must be formulated and reported to the chief engineer of the coal mine for approval. Moreover, during the gas emission process, the gas concentration at the mixing point of the discharged gas and the full-pressure air flow must not exceed 1.5%.

[0003] Traditional methods for controlling the air flow to discharge gas include tying the air duct, blocking the inlet of the local ventilator, disconnecting the air duct, connecting a three-way air duct, etc. Traditional methods for controlling the air flow to discharge gas require complex working procedures, a large number of operators, are time-consuming and laborious, and mainly rely on work experience during air flow regulation. Once the operation is improper, it is easy to cause "one-blow ventilation", that is, starting the local fan to discharge the gas in the entire roadway at one time without considering the gas concentration in the return air flow of the gas, which is likely to cause the gas concentration in the return air flow to exceed the limit and result in gas accidents.

[0004] With the application of the variable-frequency speed regulation device for local fans, some mines achieve safe gas emission by regulating the air supply volume of local fans through the variable-frequency device. Although the variable-frequency speed regulation device for local fans has achieved certain effects, the cost of new intelligent variable-frequency fans is relatively high, and the market application is less. At present, the local fans in coal mines are still mainly traditional industrial-frequency operation ordinary fans. How to achieve efficient and safe gas emission at low cost for traditional ordinary fans is an urgent problem to be solved at present. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to solve the problems of complex air flow control, time-consuming and laborious of traditional ordinary fans, and propose a remotely automatic hierarchical pneumatic control type gas emission device for the flow control transformation of traditional ordinary fans.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A remote automatic hierarchical pneumatic control type gas discharge device, including a gas discharger with both ends respectively connected to air ducts; a plurality of air discharge openings are provided on the side wall of the gas discharger, and a pneumatic opening and closing mechanism for controlling the opening and closing of each air discharge opening is provided on each air discharge opening;

[0008] Both ends of the gas discharger are respectively an air outlet and an air inlet. The fresh air flow in the air duct is introduced into the gas discharger from the air inlet, and is shunted and controlled through the air discharge openings, so as to control the air volume of the air outlet.

[0009] Furthermore, the pneumatic opening and closing mechanism includes a bracket, a cylinder, and a sealing plate; the sealing plate is arranged on the piston rod of the cylinder and is arranged opposite to the air discharge opening. Driven by the cylinder, the sealing plate is in sealing contact with or separated from the air discharge opening; the cylinder is fixedly arranged on the outer wall of the gas discharger through the bracket.

[0010] Furthermore, it also includes an air circuit conversion box and a gas storage tank; there are multiple air discharge openings, which are distributed at intervals along the axial direction of the gas discharger; the pneumatic opening and closing mechanisms on each air discharge opening are respectively connected to the air circuit conversion box through pipelines, and the air circuit conversion box is communicated with the gas storage tank, and the air circuit is switched and controlled through the air circuit conversion box.

[0011] Furthermore, it also includes a wind speed sensor, and the wind speed sensor is arranged at one end of the gas discharger close to the air outlet.

[0012] Furthermore, a PLC controller is connected to the air circuit conversion box, the wind speed sensor is connected to the PLC controller, and the PLC controller controls the opening and closing of each air discharge opening through the air circuit conversion box according to the wind speed fed back by the wind speed sensor.

[0013] Furthermore, it also includes a gas concentration sensor, and the gas concentration sensor is arranged on the gas outburst surface in the roadway and is connected to the PLC controller; the PLC controller controls the opening and closing of each air discharge opening according to the gas concentration obtained by the gas concentration sensor.

[0014] Furthermore, a manual controller is also connected to the air circuit conversion box for manually controlling the opening and closing of each air discharge opening.

[0015] Furthermore, it also includes a ground monitor for displaying the operation status, and the ground monitor is connected to the PLC controller.

[0016] Furthermore, the air circuit conversion control box includes a box body and an electromagnetic valve arranged in the box body. The pneumatic opening and closing mechanisms are respectively communicated with the electromagnetic valve through pipelines and are communicated with the gas storage tank through the electromagnetic valve.

[0017] Furthermore, the cylinder is a locking cylinder.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention has the function of gas graded discharge. The gas discharger is directly installed between two sections of air ducts close to the gas gushing surface. Fresh air flows in from the upper section of the air duct and flows out to the lower flexible air duct after passing through the gas discharger. Since the gas discharger is provided with a vent, graded air discharge can be carried out, thereby controlling the air volume entering the gas gushing surface, and then realizing the graded control type discharge of the gushing gas, avoiding gas overrun, and improving the safety of gas discharge.

[0020] 2. The vent in the present invention is controlled by a pneumatic opening and closing mechanism, using the gas source as the power source, and remotely controlled by a solenoid valve and a PLC controller, ensuring the use safety of the device in a high-gas environment. At the same time, the operating state of the device can be viewed in real time through a ground monitor.

[0021] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. Brief Description of the Drawings

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, where:

[0023] Figure 1 is the overall schematic diagram of the remote automatic graded pneumatic control type gas discharge device in the present invention;

[0024] Figure 2 is the working logic flow chart of the PLC controller in the present invention.

[0025] Reference numerals: 1. Gas discharger; 2. Flexible air duct; 3. Bracket; 4. Cylinder; 5. Sealing plate; 6. Gas circuit conversion box; 7. Gas storage tank; 8. PLC controller; 9. Manual controller; 10. Ground monitor; 11. Wind speed sensor; 101. Air outlet; 102. Air inlet; 103. Vent. Detailed Embodiments

[0026] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0027] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams rather than actual pictures, and should not be construed as limitations on the present invention; in order to better illustrate the embodiments of the present invention, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] In the drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only for illustrative purposes and should not be construed as limitations on the present invention. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Please refer to Figure 1 , which is a remotely automatic hierarchical pneumatic control type gas discharge device, including a gas discharger 1 with both ends respectively connected to a flexible air duct 2; there are 4 air discharge openings 103 arranged at intervals along the axial direction of the gas discharger 1 on the side wall of the gas discharger 1, and a pneumatic opening and closing mechanism for controlling the opening and closing of each air discharge opening 103 is correspondingly arranged on each air discharge opening 103; among them, the two ends of the gas discharger 1 are respectively an air outlet 101 and an air inlet 102, and the fresh air flow in the air duct is introduced into the gas discharger 1 from the air inlet 102 and is controlled by shunting through the air discharge openings 103, so as to control the air volume of the air outlet 101.

[0030] The pneumatic opening and closing mechanism includes a bracket 3, a cylinder 4, and a sealing plate 5; the sealing plate 5 is fixedly installed on the piston rod of the cylinder 4 and is disposed opposite to the air release port 103. Driven by the cylinder 4, the sealing plate 5 makes sealing contact with or separates from the air release port 103; the cylinder 4 is fixedly installed on the outer wall of the gas discharger 1 through the bracket 3. The cylinder 4 in this embodiment is a locking cylinder 4. In the case of sudden power failure and sudden pressure relief of the air source, the position of the piston rod can be automatically locked, so that the cylinder 4 and the sealing plate 5 can continue to work in the original state.

[0031] In this embodiment, it further includes an air circuit conversion box 6, an air storage tank 7, a wind speed sensor 11, and a gas concentration sensor; the pneumatic opening and closing mechanisms on each air release port 103 are respectively connected to the air circuit conversion box 6 through pipelines. The air circuit conversion box 6 is communicated with the air storage tank 7, and the air circuit switching control is carried out through the air circuit conversion box 6. The wind speed sensor 11 is fixedly installed at one end of the gas discharger 1 close to the air outlet 101. An PLC controller 8 is connected to the air circuit conversion box 6, and the wind speed sensor 11 is connected to the PLC controller 8; the gas concentration sensor is installed at the gas outburst surface in the roadway and is connected to the PLC controller 8; the PLC controller 8 controls the opening and closing of each air release port 103 according to the gas concentration obtained by the gas concentration sensor and the wind speed feedback by the wind speed sensor 11.

[0032] Among them, the air circuit conversion control box includes a box body and an electromagnetic valve arranged in the box body. The pneumatic opening and closing mechanisms are respectively communicated with the electromagnetic valve through pipelines and are communicated with the air storage tank 7 through the electromagnetic valve. The electromagnetic valve is communicated with the PLC controller 8 and is controlled by it.

[0033] In this embodiment, a manual controller 9 is further connected to the air circuit conversion box 6 for manually controlling the opening and closing of each air release port 103. A ground monitor 10 is also connected to the PLC controller 8 for remotely displaying the operating state of the entire device.

[0034] As Figure 2 shown, the remote automatic grading pneumatic control type gas discharge device in this embodiment divides the air flow control into five gears, where a is the gas concentration at the gas detection point, and 1, 2, 3, and 4 are respectively the threshold points of the set 4 gas concentrations. The PLC controller 8 controls the opening and closing of the air release port 103 according to the comparison between a and the threshold points, and performs the control process according to Figure 2 to realize the graded discharge of the air volume according to the gas concentration.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A remote automatic grading pneumatic control type gas emission device, characterized in that: It includes a gas discharger with both ends respectively connected to the air ducts; a number of air discharge openings are provided on the side wall of the gas discharger, and each air discharge opening is provided with a pneumatic opening and closing mechanism for controlling the opening and closing of the air discharge opening; Both ends of the gas discharger are respectively an air outlet and an air inlet. The fresh air flow in the air duct is introduced into the gas discharger from the air inlet, and the air flow is controlled by shunting through the air discharge openings, so as to control the air volume of the air outlet; The pneumatic opening and closing mechanism includes a bracket, a cylinder, and a sealing plate; the sealing plate is arranged on the piston rod of the cylinder and is arranged opposite to the air discharge opening. Driven by the cylinder, the sealing plate is in sealing contact with or separated from the air discharge opening; the cylinder is fixedly arranged on the outer wall of the gas discharger through the bracket; The device further includes an air path conversion box, a gas storage tank, a wind speed sensor, and a gas concentration sensor; there are multiple air discharge openings, which are distributed at intervals along the axial direction of the gas discharger; the pneumatic opening and closing mechanisms on each air discharge opening are respectively connected to the air path conversion box through pipelines, and the air path conversion box is communicated with the gas storage tank, and the air path switching control is carried out through the air path conversion box; the wind speed sensor is arranged at one end of the gas discharger close to the air outlet; The air path conversion box is connected with a PLC controller. The wind speed sensor is connected with the PLC controller. The PLC controller controls the opening and closing of each air discharge opening through the air path conversion box according to the wind speed fed back by the wind speed sensor; the gas concentration sensor is arranged at the gas outburst surface in the roadway and is connected with the PLC controller; the PLC controller controls the opening and closing of each air discharge opening according to the gas concentration obtained by the gas concentration sensor; The air path conversion control box includes a box body and a solenoid valve arranged in the box body. The pneumatic opening and closing mechanisms are respectively communicated with the solenoid valve through pipelines and are communicated with the gas storage tank through the solenoid valve.

2. The remotely automatic hierarchical pneumatic control type gas drainage device according to claim 1, wherein: The air path conversion box is further connected with a manual controller for manually controlling the opening and closing of each air discharge opening.

3. The remotely automatic hierarchical pneumatic control type gas drainage device according to claim 1, wherein: It further includes a ground monitor for displaying the operation state, and the ground monitor is connected with the PLC controller.

4. The remotely automatic hierarchical pneumatic control type gas drainage device according to claim 1, wherein: The cylinder is a locking cylinder.

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