Novel blowback action method for mining dust remover

Abstract

The invention discloses a back flushing action method of a novel mining dust remover, which comprises a base and a single-acting cylinder mounted on the inner side of the base, and further comprises a turntable seat arranged on the single-acting cylinder, a rotating shaft is arranged on the base, a one-way bearing is arranged on the rotating shaft, a supporting seat is arranged on the base, and a rotating shaft is arranged on the rotating shaft. A supporting bearing is arranged on the inner side of the supporting seat, a first sealing ring, a sealing ring and a second sealing ring are sequentially arranged on the rotating shaft, a plug is arranged on one side of the base, a plurality of connecting air holes are formed in the base, a pneumatic timer is arranged on the inner side of the base, and a timer air inlet is formed in the rear end of the pneumatic timer. According to the novel air hole distribution method for the mining dust remover, the pulse blowback operation of a filter bag or a filter element of the dust remover can be realized only by using compressed air as power and control without an electric control device. The method is used in cooperation with a mining dust remover, and the safety coefficient is higher in the underground high-gas environment.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine dust removal, in particular to a method for back-blowing action of a novel mine dust collector. Background Art

[0002] A large amount of dust is generated during underground coal mine operations, including coal dust, rock dust, etc. If miners are exposed to a high concentration of dust for a long time, these fine dust particles will enter the human lungs through breathing. For example, respirable dust with a particle size of less than 5 microns can penetrate into the alveoli and deposit, causing pneumoconiosis. Pneumoconiosis is a serious occupational disease. Miners with the disease may experience symptoms such as coughing, sputum, chest pain, and difficulty breathing, and the disease is irreversible. At the same time, the coal dust in coal mines is flammable. When the concentration of coal dust in the air reaches a certain range (generally the lower limit concentration is 30-50g / m 3 ) and encounter a fire source (such as electrical sparks underground, flames from blasting, etc.), an explosion may occur. Coal dust explosions can produce high temperatures (up to 2300-2500℃), high pressures (up to 735.5kPa) and shock waves, which can cause serious damage to the underground ventilation system, support structures, equipment and facilities, and can also cause a large number of casualties. Effective underground dust removal measures can control the coal dust concentration below the lower explosion limit, eliminate the hidden dangers of dust explosions, and ensure safe production underground.

[0003] In the existing technology, dry or wet dust collectors are usually used for dust removal in coal mines. The principle is to filter the dust on the outside through filter bags or filter elements, and shake it off through pulse blowing. However, in the complex working environment underground, the traditional method is to control the air source purge through an intrinsically safe two-way solenoid valve, or manually control the purge. Since the intrinsically safe two-way solenoid valve does not have instantaneous large flow accelerated blowing and the action is slow, the effect is not good. Therefore, an efficient and safe solution is needed. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art and solve the problems of the prior art, the present invention proposes a novel back-blowing method for a mining dust collector.

[0005] A novel method for back-blowing action of a mining dust collector comprises a base and a single-acting cylinder installed on the inner side of the base, and also comprises a turntable seat arranged on the single-acting cylinder, the base is provided with a rotating shaft, the bottom end of the rotating shaft is provided with a stop pin, the rotating shaft is provided with a one-way bearing, the base is provided with a support seat, the inner side of the support seat is provided with a support bearing, the rotating shaft is provided with a first sealing ring, a sealing ring and a second sealing ring in sequence, a plug is provided on one side of the base, an upper cavity is provided on the top of the base, an exhaust valve is provided at the end of the single-acting cylinder, a plurality of connecting air holes are opened on the base, a pneumatic timer is provided on the inner side of the base, a timer air inlet is provided at the rear end of the pneumatic timer, the timer air inlet is connected to the single-acting cylinder through a first connecting air pipe, a pneumatic pulse valve is provided on the inner side of the base, a second connecting air pipe is connected to the pneumatic pulse valve, and a pulse valve compressed air inlet is provided at the rear end of the pneumatic pulse valve.

[0006] Preferably, the first connecting air pipe and the second connecting air pipe are both made of stainless steel soft pipes, and the joints of the first connecting air pipe and the second connecting air pipe are both made of ferrule-type copper joints.

[0007] Preferably, a hole is opened on the side of the axial opening of the rotating shaft, and a hole is opened on the side of the sealing ring to communicate with the side hole of the rotating shaft.

[0008] Preferably, the first sealing ring, the plug, the sealing ring and the second sealing ring form a complete set of sealed double-layer structure to ensure the air tightness of the rotating shaft.

[0009] The present invention is beneficial in that:

[0010] The present invention provides a novel method for distributing air holes in a mine dust collector, which can realize pulse backwashing of a dust collector filter bag or filter element without an electric control device, using only compressed air as power and control. The method is used in conjunction with a mine dust collector, and has a higher safety factor in a high-gas environment underground. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 It is a structural schematic diagram of a rotating shaft in a method for back-blowing action of a novel mining dust collector of the present invention;

[0013] Figure 2The present invention is a schematic diagram of the structure of connecting air holes in a method for back-blowing action of a novel mining dust collector.

[0014] Notes on the accompanying drawings: 101, base; 102, single-acting cylinder; 103, turntable seat; 104, stop pin; 105, rotating shaft; 106, one-way bearing; 107, support seat; 108, support bearing; 109, first sealing ring; 110, plug; 111, sealing ring; 112, second sealing ring; 113, upper cavity; 114, exhaust valve; 115, connecting air hole; 116, pneumatic timer; 117, timer air inlet; 118, first connecting air pipe; 119, pneumatic pulse valve; 120, second connecting air pipe; 121, compressed air inlet of pulse valve. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1As shown, a novel method for back-blowing action of a mining dust collector comprises a base 101 and a single-acting cylinder 102 installed inside the base 101, and also comprises a turntable seat 103 arranged on the single-acting cylinder 102, a rotating shaft 105 is arranged on the base 101, a stop pin 104 is arranged at the bottom end of the rotating shaft 105, a one-way bearing 106 is arranged on the rotating shaft 105, a support seat 107 is arranged on the base 101, a support bearing 108 is arranged inside the support seat 107, and a rotating shaft 105 is arranged on the rotating shaft 105. A first sealing ring 109, a sealing ring 111 and a second sealing ring 112 are provided in sequence, a plug 110 is provided on one side of the base 101, a hole is provided on the side of the axial opening of the rotating shaft 105, a hole is provided on the side of the sealing ring 111 and communicates with the side hole of the rotating shaft 105, the first sealing ring 109, the plug 110, the sealing ring 111 and the second sealing ring 112 form a complete set of sealed double-layer structure to ensure the airtightness of the rotating shaft 105, an upper cavity 113 is provided on the top of the base 101, and a single cavity 113 is provided on the top of the base 101. An exhaust valve 114 is provided at the end of the acting cylinder 102, a plurality of connecting air holes 115 are provided at the base 101, and a pneumatic timer 116 is provided inside the base 101. The pneumatic timer 116 is a mechanical delayed pneumatic pulse operation, and the pulse frequency is set to be operated once every 3 to 30 seconds. A timer air inlet 117 is provided at the rear end of the pneumatic timer 116, and the timer air inlet 117 is connected to the single-acting cylinder 102 through a first connecting air pipe 118. A pneumatic pulse valve 119 is provided inside the base 101. The pneumatic pulse valve 119 is connected to a second connecting air pipe 120, and a pulse valve compressed air inlet 121 is provided at the rear end of the pneumatic pulse valve 119. The timer air inlet 117 and the pulse valve compressed air inlet 121 both need to be connected to the air source. The compressed air is the commonly used compressed air underground, and the required pressure is ≤0.6MPa. The first connecting air pipe 118 and the second connecting air pipe 120 both use stainless steel soft pipes, and the joints of the first connecting air pipe 118 and the second connecting air pipe 120 both use ferrule-type copper joints.

[0017] Working principle: When using, first set the action parameters of the pneumatic timer 116, set the pulse frequency of the parameters to act once every 3 to 30 seconds, and then connect the air source to the timer air inlet 117 and the pulse valve compressed air inlet 121; when the air source is connected, the pneumatic timer 116 starts to act, and ventilates once at a certain interval according to the set pulse frequency; when the pneumatic timer 116 is in the ventilated state, the air source pushes the single-acting cylinder 102 to move through the first connecting air pipe 118, and the single-acting cylinder 102 pushes out the cylinder rod, pushing the turntable seat 103 Movement, the turntable seat 103 is connected to the rotating shaft 105 through the one-way bearing 106, this direction is the stopping direction, the rotating shaft 105 moves with it, and the side hole of the rotating shaft 105 rotates to connect with the next connecting air hole 115. The current connecting air hole 115 is blocked by the sealing ring 111, the current pneumatic pulse valve 119 stops working, and the next pneumatic pulse valve 119 starts exhausting action; when the pneumatic timer 116 is in the pulse period of gas cut-off, the single-acting cylinder 102 retracts the cylinder rod by self-force, and at this time drives the turntable seat 102 to retract. Since the one-way bearing 106 is in the non-stop direction at this time, the rotating shaft 105 remains in place. The cylinder retraction process is completed, waiting for the next time the pneumatic timer 116 is in the ventilation state and extends again. The whole process is completed automatically, purely mechanical action, without manual intervention, just turn off the gas source after all operations are completed. When it is necessary to operate again, turn on the gas source. At the same time, there is no power supply access in this process, which is of great help for underground operations, and there is no need to consider power supply issues.

[0018] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0019] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A new method for back-blowing of a new type of dust collector for mining, characterized in that: The invention comprises a base (101) and a single-acting cylinder (102) installed on the inner side of the base (101), and also comprises a turntable seat (103) arranged on the single-acting cylinder (102); a rotating shaft (105) is arranged on the base (101); a stop pin (104) is arranged at the bottom end of the rotating shaft (105); a one-way bearing (106) is arranged on the rotating shaft (105); a supporting seat (107) is arranged on the base (101); a supporting bearing (108) is arranged on the inner side of the supporting seat (107); a first sealing ring (109), a sealing ring (111) and a second sealing ring (112) are arranged on the rotating shaft (105) in sequence; a plug (110) is arranged on one side of the base (101); An upper cavity (113) is provided on the top of the base (101), an exhaust valve (114) is provided at the end of the single-acting cylinder (102), a plurality of connecting air holes (115) are provided on the base (101), a pneumatic timer (116) is provided on the inner side of the base (101), a timer air inlet (117) is provided at the rear end of the pneumatic timer (116), the timer air inlet (117) is connected to the single-acting cylinder (102) via a first connecting air pipe (118), a pneumatic pulse valve (119) is provided on the inner side of the base (101), a second connecting air pipe (120) is connected to the pneumatic pulse valve (119), and a pulse valve compressed air inlet (121) is provided at the rear end of the pneumatic pulse valve (119).

2. The method for back-blowing of a novel dust collector for mining according to claim 1 is characterized in that: The first connecting air pipe (118) and the second connecting air pipe (120) are both made of stainless steel soft pipes, and the joints of the first connecting air pipe (118) and the second connecting air pipe (120) are both made of ferrule-type copper joints.

3. The method for back-blowing of a novel dust collector for mining according to claim 2 is characterized in that: A hole is formed on the side of the axial opening of the rotating shaft (105), and a hole is formed on the side of the sealing ring (111) and communicates with the side hole of the rotating shaft (105).

4. The method for back-blowing of a novel dust collector for mining according to claim 3 is characterized in that: The first sealing ring (109), the plug (110), the sealing ring (111) and the second sealing ring (112) form a complete set of sealing double-layer structure to ensure the air tightness of the rotating shaft (105).

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