Exhaust device

Abstract

The present invention discloses a pumping and drainage device, which relates to the technical field of coal mine gas drainage. The pumping and drainage device includes a pumping and drainage assembly and a flushing assembly. The pumping and drainage assembly includes a pumping and drainage pump, a liquid storage tank and a pumping and drainage head. The pumping and drainage pump and the pumping and drainage head are both connected to the top of the liquid storage tank. The pumping and drainage pump can extract the air in the liquid storage tank and generate negative pressure to attract the coal water in the downward hole to the liquid storage tank through the pumping and drainage head. The flushing assembly includes a flushing pump and a switching mechanism connected to each other. The pumping and drainage head is connected to the top of the liquid storage tank through the switching mechanism. The switching mechanism can selectively connect the flushing pump with the liquid storage tank, connect the flushing pump with the pumping and drainage head, or connect the top of the liquid storage tank and the pumping and drainage head. The flushing pump can inject water into the liquid storage tank when connected to the liquid storage tank to flush the liquid storage tank, and the flushing pump can also supply water to the pumping and drainage head when connected to the pumping and drainage head to flush the pumping and drainage head. The pumping and drainage device can drain the accumulated water in the downward hole and has the characteristics of good pumping and drainage effect.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine gas drainage, and more particularly, to a drainage device. Background Art

[0002] Gas is an associated gas of coal. During underground mining, it will flow into the underground mining roadway. If the uncontrolled gas emission volume is too large, it may cause safety accidents such as suffocation of personnel and gas explosion, seriously threatening the lives of personnel and the operation of equipment. Gas is known as the "number one killer" of coal mine safety production. So far, the most important gas control measures at home and abroad are gas drainage, that is, by constructing drainage boreholes in the coal seam to actively control the gas emission volume of the coal seam.

[0003] With the improvement of the standards for coal mine gas control, the layout of drainage boreholes has become diversified, such as kilometer boreholes, comb-shaped boreholes, cross boreholes, etc. The drilling cost of drainage boreholes has also increased year by year. Among these boreholes, the problem that the drainage effect is poor due to the inability to drain the accumulated water in the downward drainage boreholes has always been one of the difficult problems in gas control, affecting gas drainage.

[0004] In view of this, it is particularly important to develop and design a drainage device that can solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a drainage device that can drain the accumulated water in the downward hole and has a good drainage effect.

[0006] The present invention provides a technical solution:

[0007] In a first aspect, an embodiment of the present invention provides a drainage device, including a drainage component and a flushing component; the drainage component includes a drainage pump, a liquid storage tank and a drainage head. The drainage pump and the drainage head are both connected to the top of the liquid storage tank. The drainage head is used to be placed at the bottom of the downward hole. The drainage pump can extract the air in the liquid storage tank and generate negative pressure to attract the coal water in the downward hole to the liquid storage tank through the drainage head. The flushing component includes a flushing pump and a switching mechanism connected to each other. The drainage head is connected to the top of the liquid storage tank through the switching mechanism. The switching mechanism can selectively connect the flushing pump to the liquid storage tank, connect the flushing pump to the drainage head, or connect the top of the liquid storage tank and the drainage head. The flushing pump can inject water into the liquid storage tank to flush the liquid storage tank when connected to the liquid storage tank, and can also supply water to the drainage head to flush the drainage head when connected to the drainage head.

[0008] In combination with the first aspect, in the first implementation manner of the first aspect, the pumping and draining assembly further includes a drain valve. A drain hole is formed at the bottom of the liquid storage tank. The drain valve is arranged at the drain hole and is used to drain the coal water in the liquid storage tank. The switching mechanism is connected to the drain hole, and the flushing pump flushes the liquid storage tank by injecting water into the drain hole.

[0009] In combination with the first aspect and its above-mentioned implementation manners, in the second implementation manner of the first aspect, the flushing pump is a pulse pump.

[0010] In combination with the first aspect and its above-mentioned implementation manners, in the third implementation manner of the first aspect, the switching mechanism includes a first switching valve and a second switching valve which are connected to each other. The first switching valve is respectively connected to the flushing pump and the liquid storage tank. The second switching valve is respectively connected to the top of the liquid storage tank and the pumping head to connect the pumping head and the top of the liquid storage tank. The first switching valve can connect the flushing pump and the liquid storage tank or connect to the second switching valve. The second switching valve can connect the pumping head and the top of the liquid storage tank or connect to the pumping head. When the first switching valve is connected to the second switching valve and the second switching valve is connected to the pumping head, the flushing pump and the pumping head are connected.

[0011] In combination with the first aspect and its above-mentioned implementation manners, in the fourth implementation manner of the first aspect, the pumping head includes a pumping pipe and a one-way water outlet nozzle. One end of the pumping pipe is a pumping end, and the other end is a flushing end. The pumping end is connected to the switching mechanism. The flushing end is used to be inserted into the coal slime at the bottom of the downward hole to make the pumping end upward. A pumping port is formed on the side of the pumping pipe close to the pumping end. The one-way water outlet nozzle is arranged at the flushing end and conducts unidirectionally along the direction from inside the pumping pipe to outside the pumping pipe.

[0012] In combination with the first aspect and its above-mentioned implementation manners, in the fifth implementation manner of the first aspect, the number of the one-way water outlet nozzles is multiple. The openings of the multiple one-way water outlet nozzles away from the flushing end are all arranged back to the pumping end, and adjacent one-way water outlet nozzles are arranged at an acute angle.

[0013] In combination with the first aspect and its above-mentioned implementation manners, in the sixth implementation manner of the first aspect, the pumping head further includes a one-way water inlet nozzle. The one-way water inlet nozzle is arranged at the pumping port and conducts unidirectionally along the direction from outside the pumping pipe to inside the pumping pipe.

[0014] Combined with the first aspect and its above implementation manners, in the seventh implementation manner of the first aspect, the pumping head further includes a pumping and draining housing, which is a columnar hollow housing. The pumping and draining pipe is arranged inside the pumping and draining housing and extends along the length direction of the pumping and draining housing. A plurality of filter holes communicating with the internal space of the pumping and draining housing are formed in the side surface of the pumping and draining housing, and the filter holes correspond to the one-way water inlet nozzles.

[0015] Combined with the first aspect and its above implementation manners, in the eighth implementation manner of the first aspect, the pumping and draining device further includes a control component, which includes a main controller, a high water level sensor and a low water level sensor. The high water level sensor and the low water level sensor are arranged in the liquid storage tank at a high and a low position respectively, and are used to detect the liquid level of the coal water in the liquid storage tank. The main controller is electrically connected to the flushing pump, the switching mechanism, the pumping and draining pump, the high water level sensor and the low water level sensor respectively. When the coal water in the liquid storage tank reaches the high water level sensor, the main controller can control the drain valve to open and the pumping and draining pump to close, and when the coal water reaches the low water level sensor, control the drain valve to close. When the coal water does not reach the position of the low water level sensor within a preset time after the drain valve is opened, the main controller can also control the switching mechanism to connect the flushing pump and the liquid storage tank and start the flushing pump to flush the liquid storage tank.

[0016] Combined with the first aspect and its above implementation manners, in the ninth implementation manner of the first aspect, the pumping and draining device further includes a control component, which includes a main controller and a pressure sensor electrically connected to the main controller. The main controller is electrically connected to the pumping and draining pump, the switching mechanism and the pumping and draining pump respectively. The pressure sensor is arranged at the top of the liquid storage tank and is used to detect the air pressure in the liquid storage tank and send out a low pressure signal when the air pressure is lower than a preset minimum pressure. When the pumping and draining pump pumps the coal water through the pumping head and the main controller receives the low pressure signal, the main controller can control the pumping and draining pump to stop working, control the switching mechanism to connect the flushing pump and the pumping head, and control the flushing pump to start to flush the pumping head.

[0017] Compared with the prior art, the beneficial effects of the pumping and draining device provided by the embodiment of the present invention compared with the prior art include:

[0018] The pumping and draining assembly includes a pumping and draining pump, a liquid storage tank, and a pumping and draining head. The pumping and draining pump and the pumping and draining head are both connected to the top of the liquid storage tank. The pumping and draining head is used to be placed at the bottom of the downward hole for pumping the coal water in the downward hole. The pumping and draining method of the pumping and draining assembly is as follows: The pumping and draining pump pumps the air in the liquid storage tank to reduce the air pressure inside the liquid storage tank, and the pumping and draining head attracts the coal water in the downward hole to the liquid storage tank to complete the pumping of the coal water in the downward hole, so as to keep less coal water in the downward hole and ensure the normal operation of the gas extraction pipe 950 of the coal mine gas extraction system. The flushing assembly includes a flushing pump and a switching mechanism connected to each other, and the pumping and draining head is connected to the top of the liquid storage tank through the switching mechanism. The switching mechanism can selectively connect the flushing pump to the liquid storage tank, connect the flushing pump to the pumping and draining head, or connect the top of the liquid storage tank and the pumping and draining connecting head. When the switching mechanism connects the top of the liquid storage tank and the pumping and draining head, the pumping and draining pump generates negative pressure in the liquid storage tank and pumps the coal water in the downward hole through the pumping and draining head; when the switching mechanism connects the flushing pump to the liquid storage tank, the flushing pump can inject water into the liquid storage tank to flush the liquid storage tank to avoid blockage of the liquid storage tank and ensure the effect of pumping coal water; when the switching mechanism connects the flushing pump to the pumping and draining head, the flushing pump can inject water into the pumping and draining head to flush the pumping and draining head to avoid blockage of the pumping and draining head and further ensure the effect of pumping coal water. In this way, the probability of blockage of the extraction-related pipelines is reduced by the negative pressure extraction method, and by setting the switching mechanism and the flushing pump, the liquid storage tank and the pumping and draining head are respectively connected to the flushing pump, and the flushing pump injects water into the liquid storage tank and the pumping and draining head for flushing, further reducing the blockage of the extraction-related pipelines and ensuring the pumping and draining effect.

[0019] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, provides detailed descriptions as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic structural diagram of the pumping and draining device provided by the embodiment of the present invention when pumping coal water.

[0022] Figure 2 It is a schematic structural diagram of the pumping and draining device provided by the embodiment of the present invention when flushing the liquid storage tank.

[0023] Figure 3 It is a schematic structural diagram of the pumping and draining device provided by the embodiment of the present invention when flushing the pumping and draining head.

[0024] Figure 4 For Figure 1 the enlarged schematic diagram of the structure at IV in

[0025] Figure 5 the schematic diagram of the structure of the suction head of the suction and drainage device provided by the embodiment of the present invention.

[0026] Icon: 10 - suction and drainage device; 111 - suction and drainage pump; 112 - liquid storage tank; 1121 - drain hole; 113 - connecting hose; 115 - suction head; 116 - drain valve; 1151 - suction and drainage pipe; 1152 - suction end; 1153 - suction port; 1155 - flushing end; 1156 - one-way water outlet nozzle; 1157 - one-way water inlet nozzle; 1158 - suction and drainage housing; 1159 - filter hole; 131 - flushing pump; 132 - first one-way valve; 133 - second one-way valve; 1351 - first switching valve; 1352 - second switching valve; 151 - main controller; 152 - high water level sensor; 153 - low water level sensor; 154 - pressure sensor; 17 - explosion-proof housing; 171 - first quick plug; 172 - second quick plug; 173 - third quick plug; 174 - fourth quick plug; 900 - downward hole; 910 - coal water; 920 - coal slime; 950 - gas drainage pipe. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0028] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. The orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the inventive product is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as a limitation on the present invention. Terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance. The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0029] It should also be noted that unless otherwise clearly specified and defined, terms such as "arranged" and "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings.

[0031] Embodiment:

[0032] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 which are schematic structural diagrams of the pumping and discharging device 10 provided by the embodiment of the present invention when pumping coal water 910. Figure 2 which is a schematic structural diagram of the pumping and discharging device 10 provided by the embodiment of the present invention when flushing the liquid storage tank 112. Figure 3 which is a schematic structural diagram of the pumping and discharging device 10 provided by the embodiment of the present invention when flushing the pumping head 115.

[0033] An embodiment of the present invention provides a drainage device 10, which can drain the accumulated water in the downward hole 900 and has the characteristic of good drainage effect. The drainage device 10 can be applied to drainage scenarios such as coal mine gas drainage systems.

[0034] The following will specifically introduce the structural composition, working principle and beneficial effects of the drainage device 10 provided by the embodiment of the present invention.

[0035] The drainage device 10 includes a drainage component (not labeled in the figure) and a flushing component (not labeled in the figure). The drainage component is used to drain the coal water 910 in the downward hole 900, and the flushing component is used to flush the relevant components of the drainage component to improve the drainage effect of the drainage component.

[0036] Among them, the drainage component includes a drainage pump 111, a liquid storage tank 112 and a drainage head 115. Both the drainage pump 111 and the drainage head 115 are connected to the top of the liquid storage tank 112. The drainage head 115 is used to be placed at the bottom of the downward hole 900 for extracting the coal water 910 in the downward hole 900. The drainage method of the drainage component is: the drainage pump 111 extracts the air in the liquid storage tank 112 to reduce the air pressure inside the liquid storage tank 112, and attracts the coal water 910 in the downward hole 900 to the liquid storage tank 112 through the drainage head 115 to complete the extraction of the coal water 910 in the downward hole 900, so as to keep the coal water 910 in the downward hole 900 less and ensure the normal operation of the gas extraction pipe 950 of the coal mine gas drainage system.

[0037] The flushing component includes a flushing pump 131 and a switching mechanism (not labeled in the figure) connected to each other. The drainage head 115 is connected to the top of the liquid storage tank 112 through the switching mechanism. The switching mechanism can selectively connect the flushing pump 131 with the liquid storage tank 112, connect the flushing pump 131 with the drainage head 115, or connect the top of the liquid storage tank 112 and the drainage head 115. When the switching mechanism connects the top of the liquid storage tank 112 and the drainage head 115, the drainage pump 111 generates negative pressure in the liquid storage tank 112 and extracts the coal water 910 in the downward hole 900 through the drainage head 115; when the switching mechanism connects the flushing pump 131 with the liquid storage tank 112, the flushing pump 131 can inject water into the liquid storage tank 112 to flush the liquid storage tank 112 to avoid blockage of the liquid storage tank 112 and ensure the effect of extracting coal water 910; when the switching mechanism connects the flushing pump 131 with the drainage head 115, the flushing pump 131 can inject water into the drainage head 115 to flush the drainage head 115 to avoid blockage of the drainage head 115 and further ensure the effect of extracting coal water 910.

[0038] In this way, the probability of blockage of the pipelines related to extraction is reduced by means of negative pressure extraction. Moreover, by setting up a switching mechanism and a flushing pump 131, the liquid storage tank 112 and the extraction head 115 are respectively connected to the flushing pump 131, and the flushing pump 131 injects water into the liquid storage tank 112 and the extraction head 115 for flushing, further reducing the blockage of the pipelines related to extraction to ensure the extraction effect.

[0039] Furthermore, the extraction assembly may further include a drain valve 116, and a drain hole 1121 may be provided at the bottom of the liquid storage tank 112. The drain valve 116 is arranged at the drain hole 1121 and is used to drain the coal water 910 in the liquid storage tank 112 when it is opened. The switching mechanism is connected to the drain hole 1121, and the flushing pump 131 flushes the liquid storage tank 112 by injecting water into the drain hole 1121 to ensure that the liquid storage tank 112 can normally drain the coal water 910.

[0040] It should be noted that in this embodiment, the flushing pump 131 is a pulse pump to generate pulsed pressure water through the flushing pump 131 to flush the extraction head 115 and the liquid storage tank 112, improving the flushing and dredging effect of the flushing pump 131. Of course, the flushing effect can also be adapted by adjusting the water injection pressure and pulse frequency of the flushing pump 131.

[0041] Please continue to refer to Figures 1 - 3 , the switching mechanism may include a first switching valve 1351 and a second switching valve 1352 which are connected to each other. Among them, the first switching valve 1351 is respectively connected to the flushing pump 131 and the drain hole 1121, and the second switching valve 1352 is respectively connected to the top of the liquid storage tank 112 and the extraction head 115 to connect the extraction head 115 and the top of the liquid storage tank 112.

[0042] The second switching valve 1352 can connect the extraction head 115 and the top of the liquid storage tank 112 to generate negative pressure in the liquid storage tank 112 when the extraction pump 111 is working, and extract the coal water 910 through the extraction head 115, as Figure 1 shown, and at the same time the first switching valve 1351 disconnects the flushing pump 131 and the second switching valve 1352.

[0043] The first switching valve 1351 can also connect the flushing pump 131 and the liquid storage tank 112 to facilitate the flushing pump 131 to flush the liquid storage tank 112, or the first switching valve 1351 is connected to the second switching valve 1352, as Figure 2 shown, and at the same time the second switching valve 1352 can disconnect the liquid storage tank 112 and the extraction head 115 to prevent the water for flushing the liquid storage tank 112 from flowing back to the downward hole 900 through the extraction head 115.

[0044] The second switching valve 1352 can also be connected to the pumping head 115. At the same time, the first switching valve 1351 is connected to the second switching valve 1352 to connect the flushing pump 131 and the pumping head 115, so as to facilitate the flushing pump 131 to flush the pumping head 115, as Figure 3 shown.

[0045] It should be noted that, in this embodiment, the first switching valve 1351 and the second switching valve 1352 are two series-connected two-position three-way valves. In other embodiments, the switching mechanism can also be other structures as long as it can achieve the above pipeline switching. This embodiment is not limited.

[0046] Please refer to Figure 4 and Figure 5 , Figure 4 which is Figure 1 the enlarged schematic diagram of the structure at IV in Figure 5 and is the schematic diagram of the structure of the pumping head 115 of the pumping device 10 provided by the embodiment of the present invention.

[0047] The pumping head 115 may include a pumping pipe 1151 and a one-way water outlet nozzle 1156. One end of the pumping pipe 1151 is a pumping end 1152, and the other end is a flushing end 1155. The pumping end 1152 is connected to the switching mechanism, and the flushing end 1155 is used to insert into the coal slime 920 at the bottom of the downward hole 900, so that the pumping end 1152 is upward. In other words, when placing the pumping head 115 at the bottom of the downward hole 900, the flushing end 1155 is inserted into the coal slime 920 at the bottom of the downward hole 900 by the potential energy of falling, avoiding the whole pumping head 115 contacting the coal slime 920, so as to reduce the probability of the pumping head 115 being blocked.

[0048] And a pumping port 1153 is provided on the side of the pumping pipe 1151 close to the pumping end 1152 to pump the coal water 910 through the pumping port 1153 close to the pumping end 1152. The one-way water outlet nozzle 1156 is arranged at the flushing end 1155 and conducts unidirectionally along the direction from inside the pumping pipe 1151 to outside the pumping pipe 1151. In other words, when the pumping pump 111 is started and pumps the coal water 910 through the pumping head 115, the one-way water outlet nozzle 1156 is closed, and the coal slime 920 cannot enter the pumping pipe 1151 through the one-way water outlet nozzle 1156. When the flushing pump 131 flushes the pumping head 115, the pulsed pressure water can flow out through the one-way water outlet nozzle 1156. And because the flushing section is inserted into the coal slime 920, the pulsed pressure water can stir the coal water 910 and the coal slime 920 at the bottom of the downward hole 900. After dredging the pipeline, coal water 910 with a lower concentration is generated, so as to facilitate the coal water 910 to enter the pumping head 115, ensure the pumping effect, and enable the pumping device 10 to also pump a certain amount of coal slime 920.

[0049] Further, the number of the one-way water outlets 1156 can be multiple, and the openings of the multiple one-way water outlets 1156 away from the flushing end 1155 are all arranged facing away from the pumping end 1152, and adjacent one-way water outlets 1156 are arranged at an acute angle, or in other words, the multiple one-way water outlets 1156 are arranged radially, so as to facilitate the dispersion of the slime 920 below the flushing end 1155 and improve the effect of the pumping head 115 stirring the coal water 910 and slime 920 at the bottom of the downward hole 900.

[0050] Further, the pumping head 115 may further include a one-way water inlet 1157, which is arranged at the pumping port 1153 and conducts unidirectionally along the direction from the outside of the pumping pipe 1151 to the inside of the pumping pipe 1151. In other words, when the pumping pump 111 is started and the coal water 910 is pumped through the pumping head 115, the one-way water outlet 1156 is closed and the one-way water inlet 1157 is opened, so that the coal water 910 can enter the pumping pipe 1151 from the pumping port 1153. When the flushing pump 131 flushes the pumping head 115, the one-way water outlet 1156 is opened and the one-way water inlet 1157 is closed, and the pulsed pressure water can only flow out through the one-way water outlet 1156, so as to further ensure the effect of the pulsed pressure water stirring the coal water 910 and slime 920 at the bottom of the downward hole 900.

[0051] It should be noted that, in this embodiment, both the one-way water inlet 1157 and the one-way water outlet 1156 are one-way valves.

[0052] Further, the pumping head 115 may further include a pumping housing 1158, which is a columnar hollow housing, and the pumping pipe 1151 is arranged inside the pumping housing 1158 and extends along the length direction of the pumping housing 1158. A plurality of filter holes 1159 communicating with the internal space of the pumping housing 1158 are formed on the side surface of the pumping housing 1158, and the filter holes 1159 correspond to the one-way water inlet 1157, so as to filter impurities such as larger particles of slime 920 and reduce the probability of blockage of the pumping head 115.

[0053] Please continue to refer to Figures 1 - 3 , the pumping device 10 may further include a control component (not labeled in the figure), which includes a main controller 151, a high water level sensor 152 and a low water level sensor 153. The high water level sensor 152 and the low water level sensor 153 are arranged at a high and a low position in the liquid storage tank 112 and are used to detect the liquid level of the coal water 910 in the liquid storage tank 112. The main controller 151 is electrically connected to the flushing pump 131, the switching mechanism, the pumping pump 111, the high water level sensor 152 and the low water level sensor 153 respectively.

[0054] In specific work, the main controller 151 can control the switching mechanism to connect the liquid storage tank 112 and the pumping head 115, and control the pumping pump 111 to start to perform the work of pumping the coal water 910.

[0055] And when the coal water 910 in the liquid storage tank 112 reaches the high water level sensor 152, the main controller 151 can control the drain valve 116 to open and the pumping and drainage pump 111 to close, so as to discharge the coal water 910 through the drain valve 116, and control the drain valve 116 to close when the coal water 910 reaches the low water level sensor 153, and control the pumping and drainage pump 111 to start again after the drainage is completed, so as to pump the coal water 910 again.

[0056] And when the coal water 910 does not reach the position of the low water level sensor 153 within the preset time after the main controller 151 opens the drain valve 116, the main controller 151 can control the switching mechanism to connect the flushing pump 131 and the liquid storage tank 112, and open the flushing pump 131 to flush the liquid storage tank 112. In other words, the main controller 151 times the drainage of the liquid storage tank 112, and judges whether the liquid level of the coal water 910 reaches the position of the low water level sensor 153 within the preset time. When the liquid level of the coal water 910 does not reach the low water level sensor 153 within the preset time, it means that the drainage of the liquid storage tank 112 is blocked. The main controller 151 controls the switching structure to connect the liquid storage tank 112 and starts the flushing pump 131 to flush the liquid storage tank 112.

[0057] It can be understood that the above-mentioned main controller 151 can also be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), a voice processor, a video processor, etc.; it can also be a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The main controller 151 can also be any conventional processor, such as a PLC (Programmable Logic Controller, programmable logic controller), a single-chip microcomputer, etc. Of course, the main controller 151 can also be a relay contactor control system, which uses a combination of control electrical appliances such as switches, relays and buttons to receive signals and perform functions such as line switching, switching and regulation.

[0058] Furthermore, the control component may further include a pressure sensor 154 electrically connected to the main control. The pressure sensor 154 is disposed at the top of the liquid storage tank 112 and is used to detect the air pressure in the liquid storage tank 112 and issue a real-time low pressure signal when the air pressure is lower than the preset minimum pressure;

[0059] The main controller 151 can also control the drainage pump 111 to stop working when a low-pressure signal is received during the process of the drainage pump 111 extracting coal water 910 through the drainage head 115, control the switching mechanism to connect the flushing pump 131 and the drainage head 115, and control the flushing pump 131 to start to flush the drainage head 115; in other words, during the process of extracting the coal water 910 in the downward hole 900, if the air pressure in the liquid storage tank 112 is lower than the preset minimum pressure, it indicates that the drainage head 115 and related pipelines are blocked. The pressure sensor 154 will send a low-pressure signal. After receiving the low-pressure signal, the main controller 151 controls the drainage pump 111 to stop working, controls the switching structure to connect the flushing pump 131 and the drainage head 115, and controls the flushing pump 131 to start to flush the drainage head 115 and related pipelines to dredge the drainage head 115 and related pipelines.

[0060] In addition, it should be noted that the drainage device 10 may further include an explosion-proof housing 17. The drainage pump 111, the flushing pump 131, the switching mechanism, the liquid storage tank 112 and the main controller 151 are all arranged inside the explosion-proof housing 17. And outside the explosion-proof housing 17, there are also a first quick connector 171, a second quick connector 172, a third quick connector 173 and a fourth quick connector 174. Among them, the first quick connector 171 is connected to an external water source and communicates with the flushing pump 131. The second quick connector 172 is connected to the drain valve 116 to drain the coal water 910. The third quick connector 173 is connected to the drainage pump 111 to communicate with the external space. The fourth quick connector 174 is connected to the drainage head 115 through a connecting hose 113.

[0061] In addition, a first one-way valve 132 is also arranged between the water outlet of the flushing pump 131 and the first switching valve 1351. The flushing pump 131 is connected to the inlet of the first one-way valve 132. And a second one-way valve 133 is arranged between the first switching valve 1351 and the liquid storage tank 112. The first switching valve 1351 is connected to the inlet of the second one-way valve 133.

[0062] The working principle of the drainage device 10 provided by the embodiment of the present invention is:

[0063] In the initial state, as Figure 1 shown, the main controller 151 controls the drainage pump 111 to be in a stopped state, the flushing pump 131 to be in a stopped state, the first switching valve 1351 to be in a state of connecting the pulse pump and the liquid storage tank 112, the second switching valve 1352 to be in a state of connecting the liquid storage tank 112 and the drainage head 115, and the drain valve 116 to be in a closed state.

[0064] When the drainage device 10 performs an automatic drainage operation, as Figure 1As shown, the main controller 151 can control the extraction and drainage pump 111 to start after a 5-second delay. After the extraction and drainage pump 111 starts, the coal water 910 at the bottom of the downward hole 900 enters the extraction and drainage pipe 1151 and the connecting hose 113 between the extraction and drainage pipe 1151 and the second switching valve 1352 along the one-way water inlet nozzle 1157 of the extraction head 115, and enters the second switching valve 1352 along the connecting hose 113, and then enters the inlet at the top of the liquid storage tank 112 through the pipeline. The coal water 910 flows into the liquid storage tank 112;

[0065] When the coal water 910 enters the liquid storage tank 112 and the liquid level of the coal water 910 in the liquid storage tank 112 rises to trigger the high water level sensor 152, the extraction and drainage device 10 enters the drainage state. The main controller 151 controls the extraction and drainage pump 111 to close, the second switching valve 1352 to be in a state of disconnecting the liquid storage tank 112 and the extraction head 115, and can control the drainage valve 116 to open after a 5-second delay. When the liquid level of the coal water 910 in the liquid storage tank 112 drops to trigger the low water level sensor 153, the main controller 151 controls the drainage valve 116 to close, and can, after a 2-second delay, control the extraction and drainage pump 111 to start again and control the second switching valve 1352 to be in a state of connecting the liquid storage tank 112 and the extraction head 115 to perform the action of extracting the coal water 910 in the downward hole 900 again.

[0066] Among them, when the liquid level of the coal water 910 in the liquid storage tank 112 triggers the high water level sensor 152 and the drainage valve 116 is opened to drain the coal water 910, if the liquid level of the coal water 910 in the liquid storage tank 112 does not trigger the low water level sensor 153 within the preset time, it means that the drainage-related pipeline of the liquid storage tank 112 is blocked, and the extraction and drainage device 10 is in the state of flushing the liquid storage tank 112. As Figure 2 shown, the main controller 151 can control the drainage valve 116 to close and the flushing pump 131 to start. The pulsed pressure water generated by the flushing pump 131 enters the first switching valve 1351 through the first one-way valve 132 and is pressed out through the first switching valve 1351. The pulsed pressure water enters the slag discharge hole of the liquid storage tank 112 through the pipeline and enters the liquid storage tank 112 from the bottom of the liquid storage tank 112 through the second one-way valve 133 to stir the coal water 910 in the liquid storage tank 112 to dredge the blockage. And when the liquid level of the coal water 910 rises to the height of the water level sensor, the extraction and drainage device 10 enters the drainage state again to drain the coal water 910.

[0067] When the extraction and drainage device 10 is performing automatic extraction and drainage operations, when the pressure of the pressure sensor 154 is lower than the preset minimum pressure, it means that the extraction head 115 and the related pipelines are blocked, and the extraction and drainage device 10 is in the state of flushing the extraction head 115. As Figure 3As shown in the figure, the main controller 151 controls the drainage pump 111 to close, the first switching valve 1351 to be in a state of communicating with the second switching valve 1352, and the second switching valve 1352 to be in a state of communicating the first switching valve 1351 and the second switching valve 1352. After a delay of 5 s, it can control the flushing pump 131 to start. The pulsed pressure water enters the first switching valve 1351 through the first one-way valve 132, enters the second switching valve 1352 through the pipeline of the first switching valve 1351, is pressed out through the second switching valve 1352, and then passes through the connecting hose 113 to the drainage head 115 and is ejected from the one-way water outlet nozzle 1156 to stir the coal water 910 at the bottom of the hole. After the pipeline is dredged, the automatic drainage operation can be continued.

[0068] In addition, when the liquid storage tank 112 is blocked or the drainage head 115 is blocked, the main controller 151 controls the working state of the flushing pump 131, increases the pressure of the pulsed pressure water to more than 1.25 times the pressure in the above flushing process, and increases the pulse frequency of the flushing pump 131 to more than 1.25 times the pulse frequency during operation in the above flushing process to improve the flushing intensity.

[0069] In summary:

[0070] The embodiment of the present invention provides a drainage device 10, which can drain the accumulated water in the downward hole 900 and has the characteristics of good drainage effect.

[0071] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the features in the above embodiments can be combined with each other without conflict, and the present invention can also have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. And the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference numerals in the claims should not be regarded as limiting the corresponding claims.

Claims

1. An exhaust device, characterized in that, It includes an exhaust component and a flushing component; The exhaust component includes an exhaust pump (111), a liquid storage tank (112) and an exhaust head (115). The exhaust pump (111) and the exhaust head (115) are both connected to the top of the liquid storage tank (112). The exhaust head (115) is used to be placed at the bottom of the downward hole (900). The exhaust pump (111) can extract the air in the liquid storage tank (112) and generate negative pressure to attract the coal water (910) in the downward hole (900) to the liquid storage tank (112) through the exhaust head (115); The flushing component includes a flushing pump (131) and a switching mechanism connected to each other. The exhaust head (115) is connected to the top of the liquid storage tank (112) through the switching mechanism. The switching mechanism can selectively connect the flushing pump (131) to the liquid storage tank (112), connect the flushing pump (131) to the exhaust head (115), or connect the top of the liquid storage tank (112) and the exhaust head (115). The flushing pump (131) can inject water into the liquid storage tank (112) when connected to the liquid storage tank (112) to flush the liquid storage tank (112). The flushing pump (131) can also supply water to the exhaust head (115) when connected to the exhaust head (115) to flush the exhaust head (115); The switching mechanism includes a first switching valve (1351) and a second switching valve (1352) connected to each other. The first switching valve (1351) is respectively connected to the flushing pump (131) and the liquid storage tank (112). The second switching valve (1352) is respectively connected to the top of the liquid storage tank (112) and the exhaust head (115) to connect the exhaust head (115) and the top of the liquid storage tank (112).

2. The exhaust device according to claim 1, wherein The exhaust component further includes a drain valve (116). A drain hole (1121) is opened at the bottom of the liquid storage tank (112). The drain valve (116) is arranged at the drain hole (1121) and is used to discharge the coal water (910) in the liquid storage tank (112); The switching mechanism is connected to the drain hole (1121). The flushing pump (131) flushes the liquid storage tank (112) by injecting water into the drain hole (1121).

3. The exhaust device according to claim 1, characterized in that, The flushing pump (131) is a pulse pump.

4. The exhaust device according to claim 1, wherein The first switching valve (1351) can connect the flushing pump (131) and the liquid storage tank (112) or connect to the second switching valve (1352); the second switching valve (1352) can connect the exhaust head (115) and the top of the liquid storage tank (112) or connect to the exhaust head (115); so as to connect the flushing pump (131) and the exhaust head (115) when the first switching valve (1351) is connected to the second switching valve (1352) and the second switching valve (1352) is connected to the exhaust head (115).

5. The exhaust device according to any one of claims 1-4, characterized in that, The pumping head (115) includes a pumping pipe (1151) and a one-way water outlet nozzle (1156). One end of the pumping pipe (1151) is a pumping end (1152), and the other end is a flushing end (1155). The pumping end (1152) is connected to the switching mechanism, and the flushing end (1155) is used to insert into the coal slime (920) at the bottom of the downward hole (900) to make the pumping end (1152) upward. A pumping port (1153) is formed on the side surface of the pumping pipe (1151) near the pumping end (1152). The one-way water outlet nozzle (1156) is arranged at the flushing end (1155) and is unidirectionally conductive along the direction from the inside of the pumping pipe (1151) to the outside of the pumping pipe (1151).

6. The exhaust device according to claim 5, wherein The number of the one-way water outlet nozzles (1156) is multiple. The openings of the multiple one-way water outlet nozzles (1156) away from the flushing end (1155) are all arranged facing away from the pumping end (1152), and adjacent one-way water outlet nozzles (1156) are arranged at an acute angle.

7. The exhaust device according to claim 5, characterized in that, The pumping head (115) further includes a one-way water inlet nozzle (1157). The one-way water inlet nozzle (1157) is arranged at the pumping port (1153) and is unidirectionally conductive along the direction from the outside of the pumping pipe (1151) to the inside of the pumping pipe (1151).

8. The exhaust device according to claim 7, characterized in that, The pumping head (115) further includes a pumping housing (1158). The pumping housing (1158) is a columnar hollow housing. The pumping pipe (1151) is arranged inside the pumping housing (1158) and extends along the length direction of the pumping housing (1158). A plurality of filter holes (1159) communicating with the internal space of the pumping housing (1158) are formed on the side surface of the pumping housing (1158), and the filter holes (1159) correspond to the one-way water inlet nozzle (1157).

9. The exhaust device according to claim 2, wherein The pumping device (10) further includes a control component. The control component includes a main controller (151), a high water level sensor (152) and a low water level sensor (153). The high water level sensor (152) and the low water level sensor (153) are arranged at a high and a low position in the liquid storage tank (112) and are used to detect the liquid level of the coal water (910) in the liquid storage tank (112). The main controller (151) is electrically connected to the flushing pump (131), the switching mechanism, the pumping pump (111), the high water level sensor (152) and the low water level sensor (153) respectively. When the coal water (910) in the liquid storage tank (112) reaches the high water level sensor (152), the main controller (151) can control the drain valve (116) to open and the pumping pump (111) to close, and when the coal water (910) reaches the low water level sensor (153), control the drain valve (116) to close. The main controller (151) is also capable of controlling the switching mechanism to connect the flushing pump (131) and the liquid storage tank (112) and turning on the flushing pump (131) to flush the liquid storage tank (112) when the coal water (910) does not reach the position of the low water level sensor (153) within a preset time after the drain valve (116) is opened.

10. The exhaust device according to any one of claims 1-4, characterized in that, The pumping and discharging device (10) further includes a control component, and the control component includes a main controller (151) and a pressure sensor (154) electrically connected to the main controller. The main controller (151) is electrically connected to the pumping and discharging pump (111), the switching mechanism, and the pumping and discharging pump (111) respectively. The pressure sensor (154) is disposed at the top of the liquid storage tank (112) and is used for detecting the air pressure in the liquid storage tank (112) and sending out a low pressure signal when the air pressure is lower than a preset minimum pressure. When the pumping and discharging pump (111) extracts the coal water (910) through the pumping and discharging head (115) and the main controller (151) receives the low pressure signal, the main controller (151) is capable of controlling the pumping and discharging pump (111) to stop working, controlling the switching mechanism to connect the flushing pump (131) and the pumping and discharging head (115), and controlling the flushing pump (131) to start to flush the pumping and discharging head (115).

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