Coal yard fire preventing and extinguishing device capable of being backwashed

Abstract

The utility model discloses a coal yard fire preventing and extinguishing device capable of being backwashed, which comprises a mixing and stirring component, a backwash component and a backwash component, the mixing and stirring component comprises a stirring bin, the stirring bin is provided with a slurry outlet, and a slurry outlet control valve is arranged at the slurry outlet; the slurry spraying pump is provided with a slurry spraying inlet and a slurry spraying outlet, the slurry spraying inlet is connected with the slurry outlet control valve, and a backwash connector is arranged on a connecting pipeline between the slurry spraying inlet and the slurry outlet control valve; the backwash water supply assembly comprises a backwash water supply pipe, one end of the backwash water supply pipe is suitable for being communicated with a high-pressure water source, and the other end of the backwash water supply pipe is communicated with the backwash connector. According to the fire preventing and extinguishing device for the coal yard, the backwashing water supply assembly is adopted for conveying washing water to the stirring cavity from the downstream end pipeline of the slurry outlet in the reverse direction, so that the washing strength of the downstream end pipeline of the slurry outlet in the washing process is greatly improved, and residual slurry of the part of the pipeline is washed more cleanly; therefore, the blocking frequency of the part of pipeline is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fire prevention and extinguishing technology, and in particular to a coal yard fire prevention and extinguishing device capable of backwashing. Background Technology

[0002] Nowadays, in places where coal is stored, such as power plants, steel mills, and ports, coal is prone to spontaneous combustion due to oxidation, which can lead to adverse effects such as reduced calorific value, environmental pollution, and fires. To solve this problem, spraying equipment is generally used to form an oxygen barrier layer on the surface of the coal pile, which blocks the air leakage and oxygen supply channels, slows down the oxidation process of the coal, and thus plays a role in preventing and extinguishing fires in the coal pile.

[0003] When shotcrete equipment is used for fire prevention and extinguishing, it needs to undergo multiple rounds of mixing, slurry preparation, and spraying. Due to the viscous and easily solidified properties of the slurry, to prevent residual slurry from solidifying and clogging the pipes after spraying, the equipment is usually flushed promptly after spraying. In related technologies, during the flushing process of shotcrete equipment, the flushing force of the pipeline downstream of the slurry outlet is insufficient, resulting in incomplete removal of residual slurry and frequent blockages in this section of the pipeline. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a coal yard fire prevention and extinguishing device capable of backwashing. This device employs a backwashing water supply assembly to deliver flushing water from the downstream end of the slurry outlet pipe in the opposite direction towards the mixing chamber. This significantly increases the flushing force of the water flow on the downstream end of the slurry outlet pipe during the flushing process, resulting in cleaner removal of residual slurry from this section of the pipe and reducing the frequency of blockage in this section.

[0005] A coal yard fire prevention and extinguishing device capable of backwashing according to an embodiment of the present invention includes: a mixing assembly, the mixing assembly including a mixing chamber, the mixing chamber defining a mixing cavity, the mixing chamber having a water inlet, a material inlet and a slurry outlet communicating with the mixing cavity, and a slurry outlet having a slurry control valve for controlling the opening and closing of the slurry outlet; a slurry pump having a slurry inlet and a slurry outlet, the slurry outlet being adapted to connect to a spray gun or a grouting pipe, the slurry inlet being connected to the slurry control valve, and a backwashing interface being provided on the connecting pipeline between the slurry inlet and the slurry control valve; and a backwashing water supply assembly including a backwashing water supply pipe, one end of the backwashing water supply pipe being adapted to connect to a high-pressure water source, and the other end of the backwashing water supply pipe being connected to the backwashing interface.

[0006] According to the embodiments of the present invention, a coal yard fire prevention and extinguishing device capable of backwashing uses a backwashing water supply component to deliver flushing water from the downstream end pipeline of the slurry outlet in the opposite direction to the mixing chamber. This greatly enhances the flushing force of the water flow on the downstream end pipeline of the slurry outlet during the flushing process, and the residual slurry in this part of the pipeline is flushed more cleanly, thereby reducing the frequency of blockage in this part of the pipeline.

[0007] In addition, the coal yard fire prevention and extinguishing device capable of backwashing according to the embodiments of this utility model may also have the following additional technical features:

[0008] According to one embodiment of the present invention, the backwash water supply assembly further includes a backwash water supply control valve, which is adapted to be disposed between one end of the backwash water supply pipe and the high-pressure water source.

[0009] According to one embodiment of the present invention, the backwash water supply control valve is an electrically controlled valve.

[0010] According to one embodiment of the present invention, the backwash water supply assembly further includes a timing device, which is electrically connected to the backwash water supply control valve to detect the opening time of the backwash water supply control valve and control the backwash water supply control valve to close according to the detected time.

[0011] According to one embodiment of the present invention, the backwash water supply assembly further includes a backwash flow metering device. The backwash water supply pipe includes a first backwash water supply section and a second backwash water supply section. The backwash flow metering device is connected between the first backwash water supply section and the second backwash water supply section. The end of the first backwash water supply section away from the backwash flow metering device is adapted to be connected to the high-pressure water source. The end of the second backwash water supply section away from the backwash flow metering device is connected to the backwash interface. The backwash flow metering device is electrically connected to the backwash water supply control valve.

[0012] According to one embodiment of the present invention, the connecting pipeline between the grouting inlet and the grouting control valve includes: a grouting pipe, one end of which is connected to the grouting control valve; a connecting joint, the connecting joint including a grouting pipe connecting end and a grouting inlet connecting end that are connected to each other, the grouting pipe connecting end being connected to the other end of the grouting pipe, the grouting inlet connecting end being connected to the grouting inlet, and the backwashing interface being provided on the side peripheral wall of the grouting inlet connecting end.

[0013] According to one embodiment of the present invention, the connecting joint further includes a slurry discharge port that is connected to both the slurry outlet pipe connection end and the slurry injection inlet connection end, and the slurry discharge port is provided with a slurry discharge control valve for controlling the opening and closing of the slurry discharge port.

[0014] According to one embodiment of the present invention, the coal yard fire prevention and extinguishing device further includes a stirring water supply assembly, which includes: a stirring water supply pipe, the stirring water supply pipe including a first stirring water supply section and a second stirring water supply section connected to each other; a flow metering device, the flow metering device being connected between the first stirring water supply section and the second stirring water supply section, the end of the first stirring water supply section away from the flow metering device being adapted to be connected to the high-pressure water source, and the end of the second stirring water supply section away from the flow metering device being connected to the water inlet; and a stirring water inlet control valve, the stirring water inlet control valve being disposed between the end of the second stirring water supply section away from the flow metering device and the water inlet, and the stirring water inlet control valve being electrically connected to the flow metering device.

[0015] According to one embodiment of the present invention, the coal yard fire prevention and extinguishing device further includes a water supply control valve and a main water supply pipe. The inlet end of the water supply control valve is adapted to be connected to the high-pressure water source, the outlet end of the water supply control valve is connected to one end of the main water supply pipe, and the other end of the main water supply pipe is connected to the backwash water supply control valve and the end of the first stirring water supply section away from the flow metering device.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a partial structural schematic diagram of a coal yard fire prevention and extinguishing device capable of backwashing, according to an embodiment of the present utility model.

[0019] Figure 2 yes Figure 1 A partial structural diagram of the structure shown.

[0020] 100 coal yard fire prevention and extinguishing devices;

[0021] Mixing assembly 10; mixing chamber 11; water inlet 111; material inlet 112; slurry outlet 113; slurry outlet control valve 1131;

[0022] Agitator water supply assembly 20; agitator water supply pipe 21; first agitator water supply section 211; second agitator water supply section 212; flow metering device 22; agitator water inlet control valve 23;

[0023] Backwash water supply assembly 30; backwash water supply pipe 31; backwash water supply control valve 32;

[0024] Shotcrete pump 40; Shotcrete inlet 41; Shotcrete outlet 42;

[0025] Connecting pipe 50; slurry outlet pipe 51; connecting joint 52; slurry outlet pipe connection end 521; slurry inlet connection end 522; backwashing interface 5221; slurry discharge port 523; slurry discharge control valve 5231;

[0026] Main water supply pipe 101; main water supply control valve 1011; main water supply tee pipe 102; slurry transmission pipe 103; shotcrete control valve 104. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] The following is for reference. Figures 1-2 Description of a coal yard fire prevention and extinguishing device 100 according to an embodiment of the present utility model.

[0029] refer to Figures 1-2 As shown, the coal yard fire prevention and extinguishing device 100 according to an embodiment of the present utility model includes: a mixing component 10 and a spray pump 40.

[0030] The mixing assembly 10 includes a mixing chamber 11 and a mixing element. The mixing chamber 11 defines a mixing cavity, and the mixing element is rotatably disposed in the mixing cavity. The mixing chamber 11 is provided with a water inlet 111, a material inlet 112 and a slurry outlet 113 communicating with the mixing cavity. A slurry outlet control valve 1131 is provided at the slurry outlet 113 for controlling the opening and closing of the slurry outlet 113.

[0031] The water inlet 111 is used to add water into the mixing chamber, the material inlet 112 is used to add materials into the mixing chamber, the agitator is used to agitate the materials for pulping, and the slurry outlet 113 is used to discharge the pulp from the mixing chamber. The slurry outlet control valve 1131 is used to control the opening and closing of the slurry outlet 113. During material addition and pulping, the slurry outlet control valve 1131 is in the closed state; when the pulping is completed and spraying is performed, the slurry outlet control valve 1131 can be opened so that the slurry in the mixing chamber can be discharged through the slurry outlet 113.

[0032] The shotcrete pump 40 has a shotcrete inlet 41 and a shotcrete outlet 42. The shotcrete inlet 41 is connected to a slurry control valve 1131, and the shotcrete outlet 42 is suitable for connecting a spray gun or a grouting pipe. That is, the shotcrete inlet 41 is connected to the slurry outlet 113 through the slurry control valve 1131. When the slurry control valve 1131 is open, the slurry in the mixing chamber can be conveyed towards the shotcrete inlet 41 through the slurry outlet 113. Then, driven by the shotcrete pump 40, the slurry is pumped from the shotcrete inlet 41 towards the shotcrete outlet 42, and then sprayed onto the surface of the coal pile through the spray gun or injected into the coal pile through the grouting pipe, thereby achieving fire prevention and extinguishing of the coal pile.

[0033] Understandably, when the coal yard fire prevention and extinguishing device 100 performs fire prevention and extinguishing work, it needs to undergo multiple rounds of mixing and slurry preparation and spraying. Due to the viscous and easily solidified characteristics of the slurry, in order to prevent the residual slurry in the equipment from solidifying and clogging the pipes after spraying, the equipment is usually flushed in time after spraying. However, in the existing technology, during the flushing operation, flushing water is added forward from the inlet 111 of the mixing chamber 11 into the mixing chamber. This is insufficient to flush the residual slurry in the downstream pipe of the slurry outlet 113 of the mixing chamber 11, resulting in incomplete flushing of the residual slurry and a high frequency of blockage in this part of the pipe.

[0034] To address the aforementioned issues, in one embodiment of this application, please refer to... Figure 2 A backwashing interface 5221 is provided on the connecting pipe 50 (downstream of the outlet 113) between the slurry inlet 41 and the slurry control valve 1131. The coal yard fire prevention and extinguishing device 100 also includes a backwashing water supply component 30, which includes a backwashing water supply pipe 31 and a backwashing water supply control valve 32. One end of the backwashing water supply pipe 31 is adapted to be connected to a high-pressure water source, and the other end of the backwashing water supply pipe 31 is connected to the backwashing interface 5221. The backwashing water supply control valve 32 is adapted to be located between the one end of the backwashing water supply pipe 31 and the high-pressure water source.

[0035] In other words, the high-pressure water source is connected to the backwash water supply pipe 31 via the backwash water supply control valve 32, which controls the connection between the high-pressure water source and the backwash water supply pipe 31. When the backwash water supply control valve 32 is open, the high-pressure water source can deliver flushing water to the backwash interface 5221 through the backwash water supply pipe 31; when the backwash water supply control valve 32 is closed, the flushing water supply stops. Of course, in some other embodiments of this application, the coal yard fire prevention and extinguishing device 100 may not include the aforementioned backwash water supply control valve 32, and the backwash water supply pipe 31 may be directly connected to the high-pressure water source.

[0036] By placing the backwashing interface 5221 on the connecting pipe 50 between the slurry inlet 41 and the slurry outlet control valve 1131, the backwashing water supply assembly 30 delivers backwashing water from the downstream end pipe of the slurry outlet 113 toward the mixing chamber. This greatly enhances the flushing force of the water flow on the downstream end pipe of the slurry outlet 113 during the flushing process, and the residual slurry in this part of the pipe is flushed more cleanly, thereby reducing the frequency of blockage in this part of the pipe.

[0037] The fire-fighting spraying construction site has high-pressure fire-fighting water. In this application, the "high-pressure water source" can be the high-pressure fire-fighting water source at the fire-fighting spraying construction site, which is convenient to obtain and improves the efficiency of fire-fighting spraying operations. Of course, this application is not limited to this; the "high-pressure water source" in this application can also be filtered high-pressure flushing water, etc.

[0038] It should be noted that the "high-pressure water source" (i.e., the "high-pressure water source" connected to the backwash water supply pipe 31) in this application can be the same as the "water source" (i.e., the "water source" connected to the mixing water supply assembly 20) described below for providing water required for mixing and slurry preparation, thereby facilitating water supply at the work site and eliminating the need to prepare two different water supply pipelines. Of course, this application is not limited to this, and in some other embodiments, the two can also be different.

[0039] According to the embodiment of the present invention, the coal yard fire prevention and extinguishing device 100 capable of backwashing uses a backwashing water supply component 30 to deliver flushing water in the reverse direction from the downstream end pipeline of the slurry outlet 113 into the mixing chamber. This greatly enhances the flushing force of the water flow on the downstream end pipeline of the slurry outlet 113 during the flushing process, and the residual slurry in this part of the pipeline is flushed more cleanly, thereby reducing the frequency of blockage in this part of the pipeline.

[0040] Optionally, the backwash water supply control valve 32 is an electrically controlled valve. The backwash water supply control valve 32 can be electrically connected to the control device of the coal yard fire prevention and extinguishing device 100. The control device automatically controls the opening and closing of the backwash water supply control valve 32, thereby making the coal yard fire prevention and extinguishing device 100 more intelligent.

[0041] In an optional embodiment of this application, the backwash water supply assembly 30 further includes a timing device (not shown in the figure). The timing device is electrically connected to the backwash water supply control valve 32 to detect the opening time of the backwash water supply control valve 32 and control the backwash water supply control valve 32 to close based on the detected time. Specifically, both the timing device and the backwash water supply control valve 32 are electrically connected to the control device of the coal yard fire prevention and extinguishing device 100. In this way, the timing device feeds back the detected opening duration of the backwash water supply control valve 32 to the control device, and the control device controls the backwash water supply control valve 32 to close based on the signal fed back by the timing device. For example, when the backwash water supply control valve 32 is open for a set duration (e.g., 60 seconds), the control device controls the backwash water supply control valve 32 to close, thereby realizing automatic timed water supply from the backwash water supply assembly 30 to the backwash interface 5221.

[0042] In another optional embodiment of this application, the backwash water supply assembly 30 further includes a backwash flow metering device (not shown). Optionally, the backwash flow metering device can be a flow meter. The backwash water supply pipe 31 includes a first backwash water supply section and a second backwash water supply section. The backwash flow metering device is connected between the first backwash water supply section and the second backwash water supply section. That is, the first backwash water supply section and the second backwash water supply section are connected through the backwash flow metering device. In this way, the backwash flow metering device can measure the flow rate of water passing through the backwash water supply pipe 31. The end of the first backwash water supply section away from the backwash flow metering device is adapted to be connected to a high-pressure water source. The end of the second backwash water supply section away from the backwash flow metering device is connected to the backwash interface 5221. The backwash flow metering device is electrically connected to the backwash water supply control valve 32. Specifically, the backwash flow metering device and the backwash water supply control valve 32 can both be electrically connected to the control device of the coal yard fire prevention and extinguishing device 100. The backwash flow metering device can detect the flow rate of water delivered through the backwash water supply pipe 31 toward the backwash interface 5221 and feed back the detected water flow signal to the control device. The control device controls the backwash water supply control valve 32 to close according to the flow signal fed back by the backwash flow metering device, thereby realizing the automatic quantitative water supply of the backwash water supply component 30 toward the backwash interface 5221.

[0043] Of course, this application is not limited to this. In some other embodiments, the backwash water supply control valve 32 can also be a manually controlled ball valve, which has a simple structure and low cost.

[0044] In one embodiment of this application, please refer to Figure 2The connecting pipe 50 between the shotcrete inlet 41 and the slurry control valve 1131 includes a slurry outlet pipe 51 and a connecting joint 52. One end of the slurry outlet pipe 51 is connected to the slurry control valve 1131. The connecting joint 52 includes a slurry outlet pipe connecting end 521 and a shotcrete inlet connecting end 522 that are connected to each other. The slurry outlet pipe connecting end 521 is connected to the other end of the slurry outlet pipe 51. The shotcrete inlet connecting end 522 is connected to the shotcrete inlet 41. The backwashing interface 5221 is located on the side wall of the shotcrete inlet connecting end 522. By setting the connecting joint 52, the connection between the slurry outlet pipe 51 and the slurry inlet 41 can be facilitated. At the same time, the backwashing interface 5221 is set on the side wall of the slurry inlet connection end 522. This allows the water to flow in the reverse direction through the backwashing water supply component 30 towards the mixing chamber through the backwashing interface 5221, so that the water flow can flow in the reverse direction through the entire connecting pipe 50 between the slurry inlet 41 and the slurry outlet control valve 1131. This allows the entire pipe section of the connecting pipe 50 to be fully flushed, thereby further reducing the frequency of blockage in the downstream pipe of the slurry outlet 113.

[0045] Optionally, please refer to Figure 2 The connecting joint 52 also includes a slurry discharge port 523 that is connected to both the slurry outlet pipe connection end 521 and the slurry inlet connection end 522. The slurry discharge port 523 is equipped with a slurry discharge control valve 5231. By providing the slurry discharge port 523, in the event of a malfunction of the slurry pump 40, the slurry in the mixing chamber and the slurry outlet pipe 51 can be discharged promptly by opening the slurry discharge control valve 5231, preventing the slurry from solidifying inside the equipment and facilitating maintenance. Optionally, the slurry discharge control valve 5231 can be a manually controlled ball valve, which is simple to operate and low in cost.

[0046] In one embodiment of this utility model, please refer to Figures 1-2 The coal yard fire prevention and extinguishing device 100 also includes a stirring water supply component 20, which is adapted to connect a water source and a water inlet 111 for quantitatively adding water into the stirring chamber. In other words, the stirring water supply component 20 is used to quantitatively deliver water from the water source into the stirring chamber.

[0047] Further, please refer to Figures 1-2The mixing water supply assembly 20 includes: a mixing water supply pipe 21, a flow metering device 22, and a mixing water inlet control valve 23. The mixing water supply pipe 21 includes a first mixing water supply section 211 and a second mixing water supply section 212 connected to each other. The flow metering device 22 is connected between the first mixing water supply section 211 and the second mixing water supply section 212. The end of the first mixing water supply section 211 furthest from the flow metering device 22 is adapted to connect to a water source. The end of the second mixing water supply section 212 furthest from the flow metering device 22 is connected to an inlet 111. The mixing water inlet control valve 23 is located between the second mixing water supply section 212 and the inlet 111; that is, the second mixing water supply section 212 is connected to the inlet 111 through the mixing water inlet control valve 23, and the mixing water inlet control valve 23 is electrically connected to the flow metering device 22. Optionally, the flow metering device 22 can be a flow meter.

[0048] When water is needed for pulping in the mixing chamber, the control device opens the mixing water inlet control valve 23. Water from the water source then flows sequentially through the first mixing water supply section 211, the flow metering device 22, the second mixing water supply section 212, and the mixing water inlet control valve 23 into the mixing chamber. During the water addition process, the flow metering device 22 measures the amount of water added to the mixing chamber. When the flow rate detected by the flow metering device 22 reaches the required amount, the control device closes the mixing water inlet control valve 23 based on the flow signal fed back from the flow metering device 22, thereby achieving a quantitative water addition into the mixing chamber.

[0049] In some embodiments of this application, please refer to Figures 1-2 The coal yard fire prevention and extinguishing device 100 also includes a main water supply control valve 1011 and a main water supply pipe 101. The inlet end of the main water supply control valve 1011 is suitable for connecting to a high-pressure water source, and the outlet end of the main water supply control valve 1011 is connected to one end of the main water supply pipe 101. The other end of the main water supply pipe 101 is connected to both the backwash water supply control valve 32 and the end of the first mixing water supply section 211 furthest from the flow metering device 22. That is, the other end of the main water supply pipe 101 is connected to the backwash water supply control valve 32, so that the backwash water supply control valve 32 and the water source are connected through the main water supply pipe 101; the other end of the main water supply pipe 101 is also connected to the end of the first mixing water supply section 211 furthest from the flow metering device 22, so that the water source and the first mixing water supply section 211 are also connected through the main water supply pipe 101. In other words, the water source can be split into two streams after passing through the main water supply pipe 101. One stream flows to the mixing water supply pipe 21, and the other stream flows to the backwash water supply pipe 31. In this way, the water source can simultaneously supply water to the mixing water supply pipe 21 and the backwash water supply pipe 31 through the main water supply pipe 101, thereby simplifying the overall pipeline connection of the coal yard fire prevention and extinguishing device 100, facilitating maintenance, and reducing costs.

[0050] When water needs to be supplied to the mixing water supply pipe 21 or the backwash water supply pipe 31, first connect the water source pipe (e.g., fire water pipe) to the inlet end of the main water supply control valve 1011, and then open the main water supply control valve 1011 to connect the water source and meet the water supply needs. When neither the mixing water supply pipe 21 nor the backwash water supply pipe 31 needs water supply, close the main water supply control valve 1011. After closing the main water supply control valve 1011, the connection between the water source pipe (e.g., fire water pipe) and the inlet end of the main water supply control valve 1011 can be disconnected, and the coal yard fire prevention and extinguishing device 100 can automatically move to perform spraying or grouting operations. Optionally, the main water supply control valve 1011 can be a manually controlled ball valve, which is simple in structure, easy to operate, and low in cost.

[0051] Optionally, please refer to Figure 2 The other end of the main water supply pipe 101 is connected to the backwash water supply control valve 32 and the end of the first stirring water supply section 211 away from the flow metering device 22 through the main water supply tee pipe 102, which can further simplify the connection between the pipelines.

[0052] Please see Figures 1-2 The coal yard fire prevention and extinguishing device 100 also includes a slurry transmission pipe 103. One end of the slurry transmission pipe 103 is connected to the slurry outlet 42, and the other end of the slurry transmission pipe 103 is adapted to be connected to a spray gun (not shown) or a grouting pipe (not shown). When the other end of the slurry transmission pipe 103 is connected to the spray gun, the slurry at the spray outlet 42 is transported to the spray gun through the slurry transmission pipe 103, and then sprayed onto the surface of the coal pile by the spray gun. When the other end of the slurry transmission pipe 103 is connected to the grouting pipe, the slurry at the spray outlet 42 is transported to the grouting pipe located at the coal pile through the slurry transmission pipe 103, thereby injecting the slurry into the interior of the coal pile.

[0053] Alternatively, please continue reading Figures 1-2 A grouting control valve 104 is provided at the end of the grouting transmission pipe 103 furthest from the grouting outlet 42. The grouting control valve 104 is suitable for connecting to a spray gun or grouting pipe. That is, the grouting transmission pipe 103 is connected to the spray gun or grouting pipe through the grouting control valve 104. In this way, the on / off connection between the grouting outlet 42 and the spray gun, or between the grouting outlet 42 and the grouting pipe, can be controlled by the grouting control valve 104. The grouting control valve 104 can be a manually controlled ball valve, which is simple in structure and low in cost. The shape of the nozzle of the spray gun can be arbitrarily selected according to actual needs, such as a jet nozzle or an umbrella nozzle.

[0054] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A coal yard fire prevention and extinguishing device capable of backwashing, characterized in that, include: A mixing assembly, comprising a mixing chamber, wherein a mixing cavity is defined within the mixing chamber, the mixing chamber is provided with a water inlet, a material inlet and a slurry outlet communicating with the mixing cavity, and a slurry outlet is provided at the slurry outlet for controlling the opening and closing of the slurry outlet; A shotcrete pump, wherein the shotcrete pump has a shotcrete inlet and a shotcrete outlet, the shotcrete outlet is adapted to be connected to a spray gun or a grouting pipe, the shotcrete inlet is connected to the grout outlet control valve, and a backwashing interface is provided on the connecting pipeline between the shotcrete inlet and the grout outlet control valve. A backwash water supply assembly, comprising a backwash water supply pipe, one end of which is adapted to be connected to a high-pressure water source, and the other end of which is connected to the backwash interface.

2. The coal yard fire prevention and extinguishing device capable of backwashing according to claim 1, characterized in that, The backwash water supply assembly further includes a backwash water supply control valve, which is adapted to be located between one end of the backwash water supply pipe and the high-pressure water source.

3. The coal yard fire prevention and extinguishing device capable of backwashing according to claim 2, characterized in that, The backwash water supply control valve is an electrically controlled valve.

4. The coal yard fire prevention and extinguishing device capable of backwashing according to claim 3, characterized in that, The backwash water supply assembly also includes a timing device electrically connected to the backwash water supply control valve to detect the opening time of the backwash water supply control valve and control the backwash water supply control valve to close based on the detected time.

5. The coal yard fire prevention and extinguishing device capable of backwashing according to claim 3, characterized in that, The backwash water supply assembly further includes a backwash flow metering device. The backwash water supply pipe includes a first backwash water supply section and a second backwash water supply section. The backwash flow metering device is connected between the first backwash water supply section and the second backwash water supply section. The end of the first backwash water supply section away from the backwash flow metering device is adapted to be connected to the high-pressure water source. The end of the second backwash water supply section away from the backwash flow metering device is connected to the backwash interface. The backwash flow metering device is electrically connected to the backwash water supply control valve.

6. The coal yard fire prevention and extinguishing device capable of backwashing according to claim 1, characterized in that, The connecting pipeline between the shotcrete inlet and the slurry outlet control valve includes: A slurry outlet pipe, one end of which is connected to the slurry outlet control valve; The connecting joint includes a slurry outlet pipe connecting end and a slurry inlet connecting end that are connected to each other. The slurry outlet pipe connecting end is connected to the other end of the slurry outlet pipe, and the slurry inlet connecting end is connected to the slurry inlet. The backwashing interface is located on the side wall of the slurry inlet connecting end.

7. The coal yard fire prevention and extinguishing device capable of backwashing according to claim 6, characterized in that, The connection joint also includes a slurry discharge port that is connected to both the slurry outlet pipe connection end and the slurry inlet connection end, and the slurry discharge port is provided with a slurry discharge control valve for controlling the opening and closing of the slurry discharge port.

8. The coal yard fire prevention and extinguishing device capable of backwashing according to claim 2, characterized in that, It also includes a stirring water supply assembly, which comprises: A stirring water supply pipe, wherein the stirring water supply pipe includes a first stirring water supply section and a second stirring water supply section connected to each other; A flow metering device is connected between the first stirring water supply section and the second stirring water supply section. The end of the first stirring water supply section away from the flow metering device is adapted to be connected to the high-pressure water source, and the end of the second stirring water supply section away from the flow metering device is connected to the water inlet. A stirring water inlet control valve is provided between the end of the second stirring water supply section away from the flow metering device and the water inlet, and the stirring water inlet control valve is electrically connected to the flow metering device.

9. The coal yard fire prevention and extinguishing device capable of backwashing according to claim 8, characterized in that, It also includes a water supply control valve and a main water supply pipe. The inlet end of the water supply control valve is adapted to be connected to the high-pressure water source. The outlet end of the water supply control valve is connected to one end of the main water supply pipe. The other end of the main water supply pipe is connected to the backwash water supply control valve and the end of the first stirring water supply section that is away from the flow metering device.

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