Delayed automatic opening emergency ventilation device
By automatically activating the emergency ventilation device after a delay and using electrical control to drive mechanical actions, the risk of gas accidents caused by abnormal shutdown of local ventilation fans in coal mines has been resolved, and automated protection of ventilation safety has been achieved.
Patent Information
- Application Number
- CN202520676587.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-10
AI Technical Summary
In cases where local ventilation fans in coal mines stop abnormally, ventilation cannot be restored in a timely manner, leading to a high risk of gas accidents.
Design a time-delayed automatic emergency ventilation device that uses electrical control to drive mechanical actions. The device includes a power supply box, a dual-circuit time-delay control module, an AC contactor, a duct sensor, a solenoid valve, and a ventilation tee. It ensures that the side duct will automatically open under abnormal conditions to provide fresh airflow, dilute toxic and harmful gases, and prevent the gas concentration from rising.
To ensure ventilation safety under special circumstances, prevent gas accidents, ensure sensitive and reliable operation, and reduce the possibility of gas accidents.
Smart Images
Figure CN223952661U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a coal mine one pass three preventions facility technical field, concretely relates to a kind of delay automatic opening emergency ventilation device. BACKGROUND
[0002] With the change of coal mine production mode and the in-depth development of mechanization, automation, informatization and intelligentization, Xieqiao coal mine is also actively responding and steadily advancing. Nowadays, the local fan of Xieqiao coal mine has begun to be controlled from the ground, and the local fan realizes true unattended operation. Various switching experiments and controls are operated by ground control operators. The system is relatively reliable. The original local fan driver is transformed into a patrol maintenance personnel, and no longer limited to the range of 30 meters near the fan, saving a lot of human resources and realizing the reduction of personnel and the improvement of efficiency of this post.
[0003] However, if the on-site equipment fails, the front power trips, the centralized control system malfunctions, or personnel misoperate, it may cause the standby local fan to stop running at the same time. If the mechanical and electrical patrol personnel are far away at this time, or cannot arrive in time due to other reasons, it is very likely to cause long-time stop of the fan, and further cause a gas accident. UTILITY MODEL CONTENTS
[0004] The technical problem to be solved by the utility model is how to provide a ventilation device to provide stable protection for the ventilation safety of non-normal stop of the accident tunneling head.
[0005] To solve the above technical problems, the utility model provides the following technical scheme: a delay automatic opening emergency ventilation device, comprising a power box, a double-circuit delay control module, a plurality of AC contactors, a wind tube sensor, a solenoid valve and a ventilation tee; the output end of the power box is connected to the voltage end and the grounding end of the double-circuit delay control module, the normally closed contact of the plurality of AC contactors is connected to the double-circuit delay control module after being connected in series, and the normally closed node of the wind tube sensor is connected to the double-circuit delay control module; the voltage end and the output end COM of the double-circuit delay control module are connected, the NO terminal and the grounding end are respectively connected with the positive and negative terminals of the solenoid valve, and the air inlet end of the solenoid valve is connected with the compressed air pipe;
[0006] The ventilation tee comprises a main wind tube, a side wind tube, a valve and a cylinder, the cylinder is fixed on the side wind tube, the cylinder is connected with the solenoid valve pneumatic interface through the air pipe, the side wind tube and the main wind tube are connected in a "Y" type, the air inlet end of the side wind tube is welded on the main wind tube, the main wind tube is provided with a through hole in correspondence, the first connecting rod is welded on the valve, the air outlet end of the side wind tube is hinged with one end of the first connecting rod away from the main wind tube, the second connecting rod is welded on one end of the first connecting rod away from the main wind tube, and the other end of the second connecting rod is hinged with the piston rod of the cylinder.
[0007] The utility model discloses a mechanical part is driven by electrical part, can guarantee ventilation safety under abnormal condition, concretely is: under abnormal condition, all disconnects the alternating current contactor in the local fan switch of coal roadway excavation, and all closes the normally open contact, and simultaneously because there is no wind pressure in the wind cylinder, the normally open node of wind cylinder sensor closes, and after receiving the above-mentioned two kinds of signals of double circuit delay control module, the relay on the module passes through the normally open contact of delay output end and closes, drives solenoid valve action, and the air inlet end of solenoid valve can connect nearby pressure pipe, and the cylinder action when ventilating, and the second connecting rod is driven downwards by the cylinder piston rod, because the second connecting rod is welded with the first connecting rod, and the first connecting rod is hinged with the valve, and according to the lever principle, the valve of ventilation tee is in the stress state, i.e. is in the open state, and all wind pressure wind flows through the side wind cylinder and enters the roadway and the head, and provides fresh wind flow for staff, and blows away or dilutes the toxic and harmful gas, and restrains or slows down the rising of gas concentration, and guarantees ventilation safety, can avoid gas accident.
[0008] Preferably, the normally open contacts of the several alternating current contactors are connected in series, and two ends are connected to the input end COM and IN1 terminal of the double circuit delay control module.
[0009] Preferably, the normally open node of the wind cylinder sensor is connected to the input end COM and IN2 terminal of the double circuit delay control module.
[0010] Preferably, the NO terminal and the ground terminal of the double circuit delay control module are connected to the positive and negative terminals of the solenoid valve through cables respectively.
[0011] Preferably, the bifurcation angle θ of the side wind cylinder and the main wind cylinder ranges from 0° to 20°.
[0012] The bifurcation angle of the side wind cylinder and the main wind cylinder in the utility model is 0° to 20°, which has the advantages that: a small angle can make the airflow direction change more gently, reduce turbulence and vortex, and avoid airflow separation caused by right-angle or large-angle bifurcation; it can make the airflow distribution more uniform and reduce flow deviation; it can also reduce the frequency of airflow impact on the pipe wall to suppress noise, and the small-angle design can also make the tee structure more compact and have high space utilization.
[0013] Preferably, the pipe diameter of the side wind cylinder is less than or equal to the pipe diameter of the main wind cylinder.
[0014] The utility model makes the pipe diameter of the side wind cylinder less than or equal to the pipe diameter of the main wind cylinder, which has the advantages that: the stress concentration at the connection is small, the weld is less likely to crack, and the small-diameter branch is light in quality and less affected by airflow pulsation, having anti-vibration performance.
[0015] Preferably, a third connecting rod is welded on the side wall of the side wind cylinder, and the other end of the third connecting rod is hinged with the bottom of the cylinder.
[0016] Preferably, the welding point of the third connecting rod and the side wind cylinder is located directly below the hinged position of the first connecting rod and the air outlet end of the side wind cylinder.
[0017] The utility model discloses the welding point of third connecting rod and side wind cylinder is located directly below the hinged position of the first connecting rod and the air outlet end of side wind cylinder, can guarantee the stability of cylinder.
[0018] Preferably, the first connecting rod is welded along the diameter direction of the valve, and the end away from the main wind cylinder extends out of the hinged position of the valve and the air outlet end of the side wind cylinder.
[0019] The utility model discloses the first connecting rod is welded along the diameter direction of the valve more stable, and the end away from the main wind cylinder extends out of the hinged position of the valve and the air outlet end of the side wind cylinder can guarantee that the valve is in the closed state, and the sealing property of the side wind cylinder is good.
[0020] Preferably, the second connecting rod is welded at an obtuse angle with the first connecting rod.
[0021] In the utility model, when the cylinder acts, the cylinder piston rod can drive the second connecting rod, and the second connecting rod can drive the valve to open or close due to the lever effect after being welded at an obtuse angle with the first connecting rod, so that the force can be efficiently transmitted.
[0022] Compared with the prior art, the utility model has the advantages that in special circumstances, the electrical control wind power can be utilized to control the mechanical action, finally the purpose of guaranteeing ventilation safety and avoiding gas accidents can be realized, the operation is strong, the action is sensitive, and the safety is reliable. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 The electrical part in the utility model embodiment is provided.
[0024] Figure 2 The mechanical part in the utility model embodiment is provided. DETAILED DESCRIPTION
[0025] In order to enable the personnel in the technical field to better understand the utility model scheme, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the personnel in the field without making the creative labor should belong to the protection range of the utility model.
[0026] EMBODIMENT
[0027] The embodiment provides a kind of delay automatic opening emergency ventilation device, including electrical part and mechanical part.
[0028] As Figure 1As shown, the electrical part includes a power box, in this embodiment, a KDW12 / 660B intrinsically safe DC power box, a double-circuit delay control module, which is a prior art module composed of a single-chip microcomputer, a relay, a digital tube, a micro switch, several AC contactors, and a wind drum sensor and a solenoid valve. In this embodiment, there are four AC contactors, but in other embodiments, the number of AC contactors is not limited to four.
[0029] The power box can supply power to the double-circuit delay control module by a 12V DC power supply, and the AC power is supplied by a nearby 127V power supply. The battery in the power box can ensure DC output for more than 2 hours after the AC power is cut off. Four normally closed contacts on the four AC contactors in the switching switch of the coal roadway control fan are connected in series, and the two ends of the series connection are connected to the input end COM and the IN1 terminal of the double-circuit delay control module. The normally closed node of the wind drum sensor is connected to the input end COM and the IN2 terminal of the double-circuit delay control module. The voltage end of the double-circuit delay control module is connected to the output end COM terminal, and the NO terminal and the ground terminal of the control module are respectively connected to the positive and negative terminals of the solenoid valve.
[0030] As shown in Figure 2 , the mechanical part is a ventilation tee, in this embodiment, an iron ventilation tee, which includes a valve 1, a cylinder 2, a side wind drum 3, and a main wind drum 4. In this embodiment, the diameter of the valve 1 is 500mm, and the thickness is 10mm. The cylinder diameter of the cylinder 2 is 100mm. The pipe diameter of the side wind drum 3 is 500mm, and the length is 1320mm. The side wall thickness is 5mm. In other embodiments, the above dimensions are not limited.
[0031] The side wind drum 3 and the main wind drum 4 are connected in a "Y" shape. The inlet end of the side wind drum 3 is welded to the main wind drum 4. The main wind drum 4 has a through hole corresponding to the welding position. The branching angle θ of the side wind drum 3 and the main wind drum 4 is in the range of 0°< θ < 20°, and in this embodiment, it is 15°. A small angle can make the airflow direction change more gently, reduce turbulence and vortex, and avoid airflow separation caused by a right angle or a large angle. It can also make the airflow distribution more uniform, reduce the flow deviation, and reduce the frequency of airflow impact on the pipe wall to suppress noise. In addition, a small angle design can also make the tee structure more compact and have a high space utilization rate. Moreover, the pipe diameter of the side wind drum 3 is less than or equal to the pipe diameter of the main wind drum 4. In this embodiment, the pipe diameter of the side wind drum 3 is less than the pipe diameter of the main wind drum 4. At this time, the stress concentration at the connection is smaller, and the welding seam is less likely to crack. In addition, the branch has a small mass and is less affected by airflow pulsation, so it has good anti-vibration performance.
[0032] As shown in Figure 2As shown, the first connecting rod 5 is welded on the valve 1, in this embodiment, the first connecting rod is welded along the diameter direction of the valve 1, and both ends thereof extend outwardly from the diameter of the valve 1, that is, the length of the first connecting rod 1 is slightly greater than the diameter of the valve 1 (or the pipe diameter of the side wind cylinder 3), in this embodiment, both ends of the first connecting rod 5 extend outwardly from the diameter of the valve 1 by 30 mm, and the end of the first connecting rod 5 away from the main wind cylinder 4 is hinged to the side wind cylinder 3 with a hinge diameter of 20 mm. In other embodiments, the above dimensions are not limited.
[0033] The second connecting rod 6 is also welded on the end of the first connecting rod 5 away from the main wind cylinder 4, in this embodiment, the length of the second connecting rod 6 is 165 mm, and the width thereof is 100 mm, the first connecting rod 5 and the second connecting rod 6 are welded at an obtuse angle, in this embodiment, the two are welded at an angle of 150°, and the other end of the second connecting rod 6 is hinged to the piston rod of the cylinder 2 with a hinge diameter of 20 mm. In other embodiments, the above dimensions are not limited.
[0034] The third connecting rod 7 is welded on the side wall of the side wind cylinder 3 away from the main wind cylinder 4, in this embodiment, the third connecting rod is welded perpendicularly and has a length of 93 mm, the third connecting rod 7 is hinged to the bottom of the cylinder 2 to achieve fixed installation of the cylinder 2, and the hinge center is 71 mm away from the side wall of the side wind cylinder 3. In other embodiments, the above dimensions are not limited.
[0035] The cylinder 2 is connected to the electromagnetic valve pneumatic interface through a gas pipe, and the air source comes from a compressed air pipe, enters the inlet end of the electromagnetic valve after passing through a filter and a compressed air storage device.
[0036] In this embodiment, the welding point of the third connecting rod 7 and the side wind cylinder 3 is located directly below the hinge position of the first connecting rod 5 and the outflow end of the side wind cylinder 3, which is beneficial to ensure the stability of the cylinder 2, in this embodiment, the welding point of the third connecting rod 7 and the side wind cylinder 3 is 540 mm away from the outflow end of the side wind cylinder 3. In other embodiments, the above dimensions are not limited.
[0037] The working principle of the utility model is as follows: the iron ventilation tee upper valve 1 is in the closed state during normal ventilation, after a stop wind fault occurs, namely in the abnormal condition, when the on-site fan stops running time is about to exceed the allowable range, the four AC contactors in the (coal roadway tunneling fan) switching switch of the utility model are all disconnected, four pairs of normally closed contacts are all closed and conducted, at the same time, because there is no wind pressure in the wind cylinder, the normally closed node of the wind cylinder sensor is closed, after the double loop delay control module receives the above two signals, the relay on the module is closed through the delay output end normally open contact, drives the electromagnetic valve to act, opens the air valve to supply air, the pneumatic cylinder acts, the cylinder piston rod drives the second connecting rod 6, because the second connecting rod 6 is welded with the first connecting rod 5, the valve at the side wind cylinder is opened in the stress state, namely in the open state, the full wind pressure air flows into the roadway and the head through the iron wind cylinder, restores part of the ventilation capacity, provides fresh air flow for the operating personnel, blows off or dilutes the toxic and harmful gas, inhibits or slows down the increase of gas concentration, and gains time for the inspection personnel to deal with the emergency on site.
[0038] The power box can ensure continuous power supply, namely before the abnormal condition occurs, the standby power source and the pressure air source are provided in advance, the emergency power source is reserved by using the power box, the ventilation safety can be ensured by cutting in at any time; the control module can control and set the delay time according to the technical regulation, the time is accurately controlled by installing the delay relay, and the misoperation is prevented; the pressure air storage device is provided, the mechanical action of the cylinder can be sufficiently powered, and the position is reliable; reliable operation can be ensured under the condition of power failure and pressure air stop, active control is realized, the ventilation deficiency hidden danger can be eliminated, and the accident expansion is prevented.
[0039] According to measurement, the local fan ventilation air volume of the solid coal roadway is 360-400 cubic meters per minute, the local fan air supply cannot be temporarily restored due to the fault, the full wind pressure air supply air volume is close to 100 cubic meters per minute after the utility model is automatically opened, and the air supply air volume can meet the needs of preventing the increase of gas concentration and normal breathing of workers within a certain time.
[0040] The utility model can accurately implement the delay automatic opening control under the emergency condition, the mechanical control opening and action are sensitive and reliable, the ventilation safety of the tunneling head is ensured when the abnormal stop wind accident occurs, the possibility of the gas accident of the head is greatly reduced, and the coal mine ventilation safety is ensured.
[0041] The above disclosed is only the preferred embodiment of the utility model, which cannot limit the right protection range of the utility model, therefore, the equivalent changes made according to the patent range of the utility model still belong to the range covered by the utility model.
Claims
1. A time-delayed automatic emergency ventilation device, characterized in that, The system includes a power supply box, a dual-circuit delay control module, several AC contactors, a duct sensor, a solenoid valve, and a ventilation tee. The output of the power supply box is connected to the voltage terminal and ground terminal of the dual-circuit delay control module. The normally closed contacts of the several AC contactors are connected in series and then connected to the dual-circuit delay control module. The normally closed contacts of the duct sensor are connected to the dual-circuit delay control module. The voltage terminal of the dual-circuit delay control module is connected to the COM output terminal, and the NO terminal and ground terminal are connected to the positive and negative terminals of the solenoid valve, respectively. The air inlet of the solenoid valve is connected to the compressed air pipeline. The ventilation tee includes a main air duct, a side air duct, a valve, and a cylinder. The cylinder is fixed on the side air duct and is connected to the pneumatic interface of the solenoid valve through an air pipe. The side air duct and the main air duct are connected in a "Y" shape. The air inlet end of the side air duct is welded to the main air duct. The main air duct has a corresponding through hole. The first connecting rod is welded to the valve. The air outlet end of the side air duct is hinged to the end of the first connecting rod away from the main air duct. The end of the first connecting rod away from the main air duct is welded to a second connecting rod. The other end of the second connecting rod is hinged to the piston rod of the cylinder.
2. The delayed automatic activation emergency ventilation device according to claim 1, characterized in that, The normally closed contacts of the several AC contactors are connected in series, and their two ends are connected to the input terminals COM and IN1 of the dual-circuit delay control module.
3. The delayed automatic activation emergency ventilation device according to claim 2, characterized in that, The normally closed node of the wind tunnel sensor is connected to the input terminals COM and IN2 of the dual-loop delay control module.
4. The delayed automatic activation emergency ventilation device according to claim 3, characterized in that, The NO terminal and ground terminal of the dual-loop delay control module are connected to the positive and negative terminals of the solenoid valve via cables, respectively.
5. The delayed automatic activation emergency ventilation device according to claim 1, characterized in that, The bifurcation angle θ between the side duct and the main duct is in the range of 0° < θ ≤ 20°.
6. The delayed automatic activation emergency ventilation device according to claim 5, characterized in that, The diameter of the side duct is less than or equal to the diameter of the main duct.
7. The delayed automatic activation emergency ventilation device according to claim 6, characterized in that, A third connecting rod is welded to the side wall of the side air duct, and the other end of the third connecting rod is hinged to the bottom of the cylinder.
8. The delayed automatic activation emergency ventilation device according to claim 7, characterized in that, The welding point between the third connecting rod and the side duct is located directly below the hinge point between the first connecting rod and the air outlet end of the side duct.
9. A time-delayed automatic emergency ventilation device according to claim 8, characterized in that, The first connecting rod is welded along the diameter of the valve, and the end away from the main air duct extends out of the valve and is hinged to the air outlet end of the side air duct.
10. A time-delayed automatic emergency ventilation device according to claim 9, characterized in that, The second connecting rod is welded to the first connecting rod at an obtuse angle.