A mine-use localized fire extinguishing inert gas fire extinguisher

Abstract

This invention provides a mine-use localized fire extinguishing inert gas fire extinguisher, relating to the field of phase change equipment technology for fire extinguishing materials. It includes a housing assembly, a feeding mechanism, an air intake and exhaust assembly, a heat exchange assembly, an external support component, a connecting support component, a drive motor, a material box assembly, and a support base. This invention connects the high-pressure fluid inlet of the ejector to the mine's compressed air system. Utilizing the jet principle, high-speed fluid from the compressed air system is introduced into the ejector. The fluid is mixed and accelerated through the low-pressure fluid inlet of the ejector, introducing air from the mine roadway. Therefore, the gas ejected by the ejector includes air from the mine's compressed air system and air from the mine roadway, serving as a heat source for phase change heat transfer. The gas ejected by the ejector is injected into the interior of the heat exchange tube. Since the heat exchange tube rotates continuously, heat exchange gas is introduced sequentially. After one rotation, the heat exchange tube passes through the ejector's outlet again, injecting new gas. The existing heat-exchanged gas flows out through the exhaust pipe.

Description

Technical Field

[0001] This invention relates to the field of phase change equipment technology for fire extinguishing materials, specifically to an inert gas fire extinguisher for localized fire prevention and extinguishing in mines. Background Technology

[0002] Currently, injecting inert gas into the goaf of coal mines is a common and efficient fire prevention and extinguishing technology. The principle of this method is to replace oxygen with inert gas, thereby slowing down the probability of fire occurrence and the speed of fire spread. Under normal conditions, inert gases such as carbon dioxide are difficult to store in large quantities and are generally stored in their solid form. Therefore, before injecting inert gas, it is necessary to sublimate the inert gas from solid to gaseous state. However, the sublimation process has a slow phase change rate under natural conditions and requires a long time. In the event of a fire, this cannot meet the needs of fire prevention and extinguishing. Currently, in existing technologies, dry ice is generally heated by electric heating to accelerate its sublimation phase change process. However, in coal mining, using electricity is very inconvenient, as it is difficult to find power sources anytime and anywhere. Moreover, coal mines generally use low-voltage power supply systems, which cannot meet the requirements of electric heating. However, the air temperature in coal mine tunnels is generally high, and mine compressed air systems are installed to deliver fresh air into the mine to ensure a safe and suitable working environment. Using mine compressed air systems and air in the mine can enhance and accelerate the sublimation phase change of solid inert gases. However, existing technologies lack a device for using mine compressed air systems to enhance and accelerate the sublimation phase change of solid inert gases. Summary of the Invention

[0003] The purpose of this invention is to provide a mine-use local fire extinguishing inert gas fire extinguisher to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A mine-use localized fire extinguishing inert gas fire extinguisher includes:

[0006] A housing assembly, comprising a hollow housing, wherein an inert gas outlet valve is installed on the housing and the inert gas outlet valve is connected to the interior of the housing;

[0007] The feeding mechanism includes a feeding pipe fixed to the side of the box, one end of which passes through the box and extends into the interior of the box, and the other end is fixed with a loading door.

[0008] An intake and exhaust assembly, comprising an ejector and an exhaust pipe, wherein the diffuser of the ejector extends into the interior of the housing, and one end of the exhaust pipe extends into the interior of the housing;

[0009] The heat exchange assembly is located inside the housing and includes multiple sets of heat exchange tubes arranged in a ring. The two ends of the heat exchange tubes are fixed to the ring-shaped sealing plates and the heat exchange tubes pass through the sealing plates. The sealing plates are slidably installed in the ring-shaped sealing seats. The outer side of the sealing seats is fixed to the inner side wall of the housing by mounting plates. The sealing plates and sealing seats at both ends of the heat exchange tubes are symmetrically arranged. The bottom of the sealing seats is provided with perforated ventilation holes. The two ventilation holes are respectively connected to the diffuser tube and the exhaust tube of the ejector. The centers of the two ventilation holes are on the same horizontal straight line along the extension direction of the heat exchange tubes.

[0010] An external support component includes a bearing that is rotatably fixed to the outside of one end of a heat exchange tube. A circular rotating plate is fixed to the outside of the bearing. An annular guide plate is fixed to the inner wall of the housing outside the rotating plate. A guide groove is provided on the inner side of the guide plate. The rotating plate is stuck inside the guide groove.

[0011] A connecting support member includes a first mounting plate, a first support frame fixed to the outer side of the first mounting plate, and the other end of the first support frame fixed to the heat exchange tube. The first support frame is located at the end away from the outer support member. A second mounting plate is provided on the inner side of the middle part of the heat exchange tube. A second support frame is fixed to the outer side of the second mounting plate, and the other end of the second support frame is fixed to the heat exchange tube. Both the first mounting plate and the second mounting plate are located on the center line of the annularly arranged heat exchange tubes.

[0012] A drive motor is fixed outside the housing, and the drive motor's shaft is coaxially connected to the first mounting plate.

[0013] Furthermore, a pressure gauge and a concentration sensor are also fixed on the chamber. Both the pressure gauge and the concentration sensor are connected to the interior of the chamber and are used to measure the internal gas pressure and the concentration of inert gas, respectively.

[0014] Furthermore, an air inlet box with an open end is fixed to the outer wall of the box body, the low-pressure fluid inlet of the ejector is connected to the interior of the air inlet box, and an exhaust valve is installed at one end of the exhaust pipe located outside the box body.

[0015] Furthermore, the sealing plate can rotate freely inside the sealing seat, and freely rotating balls are provided on the side of the sealing plate that is in contact with the sealing seat.

[0016] Furthermore, a material box assembly is provided inside the heat exchange tube. The material box assembly includes a hollow cylindrical material box. One end of the material box is open near the feed pipe, and the other end is sealed and fixed on the first support frame. The feed pipe extends into the interior of the material box. The second support frame passes through the material box. Hollow air holes are provided on the side of the material box. The outer side of the material box and the heat exchange tube are connected by a support rod.

[0017] Furthermore, the feed pipe is inclined upwards, and the loading gate is vertically positioned.

[0018] Furthermore, the exterior of the enclosure is wrapped with a layer of thermal insulation material, which is one of glass fiber, rock wool, polystyrene foam and polyurethane foam.

[0019] Furthermore, a support base is provided at the bottom of the box, and the box is fixed on the support base. The cross-section of the box is an annular structure.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] In use, this invention connects the high-pressure fluid inlet of the ejector to the mine's compressed air system. Utilizing the jet principle, the high-speed fluid flowing from the compressed air system is introduced into the ejector. The fluid is then mixed with and accelerated by the low-pressure fluid inlet of the ejector, introducing air into the mine roadway. Therefore, the gas ejected from the ejector includes air from both the mine's compressed air system and the mine roadway, serving as a heat source for phase change heat exchange. The gas ejected from the ejector is injected into the heat exchange tube. Since the heat exchange tube rotates continuously, heat exchange gases are introduced sequentially. After one rotation, new gas is injected again through the ejector's outlet. The existing heat-exchanged gas flows out through the exhaust pipe, and the phase-change inert gas is discharged through the inert gas outlet valve. In this invention, the heat exchange gas inside the heat exchange tube is discharged only after one rotation, ensuring full contact with the solid inert gas during rotation for heat exchange. This maximizes the efficiency of phase change utilization by utilizing the heat of the heat exchange gas. This invention fully utilizes the mine's air and compressed air system for heat exchange, making it highly suitable for use in mine fire prevention and extinguishing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the heat exchange component in this invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the box in this invention;

[0025] Figure 4 This is a schematic diagram of the connection structure between the heat exchange component and the external support in this invention;

[0026] Figure 5 This is a schematic diagram of the material box assembly in this invention;

[0027] Figure 6 This is an exploded structural diagram of the external support component in this invention;

[0028] Figure 7 This is a schematic diagram of the connection structure between the sealing seat and the sealing plate in this invention;

[0029] Figure 8 This is a schematic diagram of the connection structure between the heat exchange component and the material box component in this invention;

[0030] Figure 9 This is a schematic diagram of the overall structure of the present invention. In the figure: box assembly 10, box 11, inert gas outlet valve 12, pressure gauge 13, concentration sensor 14, feeding mechanism 20, feeding pipe 21, loading door 22, inlet / outlet assembly 30, ejector 31, air inlet box 32, exhaust pipe 33, exhaust valve 34, heat exchange assembly 40, heat exchange pipe 41, sealing seat 42, sealing plate 43, mounting plate 44, ventilation hole 45, ball bearing 46, outer support 50, bearing 51, rotating plate 52, guide plate 53, guide groove 54, connecting support 60, first mounting plate 61, first support frame 62, second mounting plate 63, drive motor 70, material box assembly 80, material box 81, support rod 82, support base 90. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] Example:

[0034] Please see Figures 1 to 9 The present invention provides a technical solution:

[0035] A mine-use localized fire extinguishing inert gas fire extinguisher includes a housing assembly 10, a feeding mechanism 20, an air intake and exhaust assembly 30, a heat exchange assembly 40, an outer support 50, a connecting support 60, a drive motor 70, a material box assembly 80, and a support base 90, wherein:

[0036] The housing assembly 10 includes a hollow housing 11, on which an inert gas outlet valve 12 is installed. The inert gas outlet valve 12 is connected to the interior of the housing 11. The inert gas undergoing phase change inside the housing 11 flows out through the inert gas outlet valve 12 and is transported to the local fire prevention and extinguishing area through a dedicated pipeline to achieve the effect of fire prevention and extinguishing. The dedicated pipeline adopts a gas transmission pipe, which is a mining rubber hose or a steel pipe, and the outer wall of the gas transmission pipe is provided with heat insulation material.

[0037] Furthermore, a pressure gauge 13 and a concentration sensor 14 are also fixed on the housing 11. Both the pressure gauge 13 and the concentration sensor 14 are connected to the interior of the housing 11 and are used to measure the internal gas pressure and the concentration of inert gas in the housing 11, respectively. The pressure gauge 13 is an OHR-3051F2 pressure transmitter and the concentration sensor 14 is a YA-D300 concentration detector.

[0038] The feeding mechanism 20 includes a feeding pipe 21 fixed to the side of the box 11. One end of the feeding pipe 21 passes through the box 11 and extends into the interior of the box 11, and the other end is fixed with a loading door 22. The feeding pipe 21 is used to fill the interior of the box 11 with solid inert gas. The loading door 22 can be closed after filling to ensure the airtightness of the interior of the box 11.

[0039] Furthermore, the feed pipe 21 is inclined upwards, and the loading gate 22 is vertically arranged to facilitate filling.

[0040] The intake and exhaust assembly 30 includes an ejector 31 and an exhaust pipe 33. The diffuser of the ejector 31 extends into the interior of the housing 11, and one end of the exhaust pipe 33 extends into the interior of the housing 11. In this embodiment, when the ejector 31 is working, the high-pressure fluid inlet is connected to the compressed air system of the mine, and the high-speed fluid flowing in the compressed air system is introduced into the ejector 31 by using the jet principle. The low-pressure fluid inlet of the ejector 31 is connected to the mine roadway, and the air in the roadway is mixed and accelerated by the low-pressure fluid inlet.

[0041] Furthermore, an air inlet box 32 with an open end is fixed to the outer wall of the box body 11. The low-pressure fluid inlet of the ejector 31 is connected to the interior of the air inlet box 32. The air inlet box 32 is connected to the mine roadway, which facilitates the mixing of air into the roadway into the ejector 31. An exhaust valve 34 is installed at one end of the exhaust pipe 33 located outside the box body 11.

[0042] The heat exchange assembly 40 is disposed inside the housing 11 and includes multiple sets of heat exchange tubes 41 arranged in a ring. The two ends of the heat exchange tubes 41 are fixed to the annular sealing plate 43 and the heat exchange tubes 41 pass through the sealing plate 43. The sealing plate 43 is slidably installed in the annular sealing seat 42 and can rotate within the sealing seat 42, thereby driving the annularly distributed heat exchange tubes 41 to rotate. The outer side of the sealing seat 42 is fixed to the inner side wall of the housing 11 by the mounting plate 44. The sealing plates 43 and the sealing seats 42 at both ends of the heat exchange tubes 41 are symmetrically arranged. The bottom of the sealing seat 42 is provided with a hollowed-out ventilation hole 45. The two ventilation holes 45 are respectively connected to the diffuser tube and the exhaust pipe 33 of the ejector 31. The centers of the two ventilation holes 45 are on the same horizontal straight line along the extension direction of the heat exchange tubes 41.

[0043] When the annular heat exchange tube 41 rotates, both ends of the heat exchange tube 41 pass through two vent holes 45 in sequence. At this time, the ejector 31 injects heat exchange gas into its interior. Then, as the heat exchange tube 41 rotates, the heat exchange tube 41 that just injected heat exchange gas rotates and its two ends disengage from the two vent holes 45. During rotation, the heat exchange tube 41 exchanges heat with the inert gas. After rotating one revolution, it realigns with the two vent holes 45. At this time, the ejector 31 injects heat exchange gas into its interior again, and the original gas is discharged through the exhaust pipe 33 under the push of the new gas.

[0044] The gas inside the heat exchange tube 41 is discharged only after one revolution. During the rotation, it fully contacts the solid inert gas to exchange heat, which can make the most efficient use of the heat of the heat exchange gas to carry out phase change. It can make full use of the air and compressed air system in the mine for heat exchange, making it very suitable for use in fire prevention and fire fighting in the mine.

[0045] Furthermore, the sealing plate 43 can rotate freely inside the sealing seat 42, and a freely rotatable ball 46 is provided in the side of the sealing plate 43 and the sealing seat 42 that are in contact with each other, so that the ball 46 facilitates the rotation between the sealing plate 43 and the sealing seat 42.

[0046] The external support member 50 includes a bearing 51 rotatably fixed to the outside of one end of the heat exchange tube 41. The bearing 51 can rotate freely inside the heat exchange tube 41. A circular rotating plate 52 is fixed to the outside of the bearing 51. An annular guide plate 53 is fixed on the inner wall of the housing 11 outside the rotating plate 52. A guide groove 54 is provided on the inner side of the guide plate 53. The rotating plate 52 is stuck inside the guide groove 54. When the heat exchange tube 41 rotates, the guide plate 53 rotates in the guide groove. At this time, the rotating plate 52 rotates around the bearing 51 to ensure that the heat exchange tube 41 rotates more smoothly and to support the heat exchange tube 41 from the outside.

[0047] The connecting support 60 includes a first mounting plate 61, a first support frame 62 fixed to the outside of the first mounting plate 61, and the other end of the first support frame 62 fixed to the heat exchange tube 41. The first support frame 62 is located at the end away from the outer support 50. A second mounting plate 63 is provided on the inner side of the middle of the heat exchange tube 41, and a second support frame 64 is fixed to the outside of the second mounting plate 63. The other end of the second support frame 64 is fixed to the heat exchange tube 41. The first mounting plate 61 and the second mounting plate 63 are both located on the center line of the annularly arranged heat exchange tubes 41. The first support frame 62 and the second support frame 64 provide support from the inside of the heat exchange tube 41. The connecting support 60 rotates as the heat exchange tube 41 rotates.

[0048] The drive motor 70 is fixed to the outside of the housing 11, and the shaft of the drive motor 70 is coaxially connected to the first mounting plate 61. When the drive motor 70 rotates, it drives the connecting support 60 to rotate, thereby driving the heat exchange tube 41 to rotate.

[0049] In this embodiment, a material box assembly 80 is provided on the inner side of the heat exchange tube 41. The material box assembly 80 includes a hollow cylindrical material box 81. The material box 81 is open at one end near the feed pipe 21, and the other end is sealed and fixed on the first support frame 62. The feed pipe 21 extends into the interior of the material box 81. The second support frame 64 passes through the material box 81. The side of the material box 81 is provided with hollowed-out air holes. The outer side of the material box 81 and the heat exchange tube 41 are connected by a support rod 82. The solid inert gas assembly is placed inside the material box 81. The material box 81 rotates with the rotation of the heat exchange tube 41.

[0050] The outer casing 11 is wrapped with a layer of heat-insulating material, which is one of glass fiber, rock wool, polystyrene foam and polyurethane foam. The heat-insulating material protects the casing 11 and prevents phase change from occurring when it is not required. A support base 90 is provided at the bottom of the casing 11, and the casing 11 is fixed on the support base 90. The cross-section of the casing 11 is a ring structure. The support base 90 is used to support the casing 11 for easy placement. The circular casing 11 effectively improves the compressive strength of the casing 11.

[0051] The principle of use of this invention is as follows: The entire device is placed in the area where fire prevention and extinguishing are required. Solid inert gas is pre-loaded into the device through the loading door 22. According to the coal mine working shift system, enough inert gas is loaded for each shift. Then the loading door 22 is sealed. During heat exchange, the drive motor 70 drives the connecting support 60 to rotate, thereby driving the heat exchange tube 41 to rotate.

[0052] When the ejector 31 is working, the high-pressure fluid inlet is connected to the compressed air system of the mine, and the high-speed fluid in the compressed air system is introduced into the ejector 31 by using the jet principle. The low-pressure fluid inlet of the ejector 31 is connected to the mine roadway, and the air in the roadway is mixed and accelerated by the low-pressure fluid inlet.

[0053] When the annular heat exchange tube 41 rotates, both ends of the heat exchange tube 41 pass through two vent holes 45 in sequence. At this time, the ejector 31 injects heat exchange gas into its interior. Then, as the heat exchange tube 41 rotates, the heat exchange tube 41 that just injected heat exchange gas rotates and its two ends disengage from the two vent holes 45. During rotation, the heat exchange tube 41 exchanges heat with the inert gas. After rotating one revolution, it realigns with the two vent holes 45. At this time, the ejector 31 injects heat exchange gas into its interior again, and the original gas is discharged through the exhaust pipe 33 under the push of the new gas.

[0054] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A mine-use localized fire extinguishing inert gas fire extinguisher, characterized in that, include: Box assembly (10), the box assembly (10) includes a hollow box (11), an inert gas outlet valve (12) is installed on the box (11), the inert gas outlet valve (12) is connected to the interior of the box (11); Feeding mechanism (20), the feeding mechanism (20) includes a feeding pipe (21) fixed on the side of the box (11), one end of the feeding pipe (21) passes through the box (11) and extends into the interior of the box (11), and the other end is fixed with a loading door (22). An intake and exhaust assembly (30) includes an ejector (31) and an exhaust pipe (33), wherein the diffuser of the ejector (31) extends into the interior of the housing (11) and one end of the exhaust pipe (33) extends into the interior of the housing (11); The heat exchange assembly (40) is located inside the housing (11) and includes multiple sets of heat exchange tubes (41) arranged in a ring. The two ends of the heat exchange tubes (41) are fixed on the ring-shaped sealing plate (43) and the heat exchange tubes (41) penetrate the sealing plate (43). The sealing plate (43) is slidably installed in the ring-shaped sealing seat (42). The outer side of the sealing seat (42) is fixed to the inner side wall of the housing (11) by the mounting plate (44). The sealing plates (43) and sealing seats (42) at both ends of the heat exchange tubes (41) are symmetrically arranged. The bottom of the sealing seat (42) is provided with a hollowed-out ventilation hole (45). The two ventilation holes (45) are respectively connected to the diffuser tube and the exhaust pipe (33) of the ejector (31). The centers of the two ventilation holes (45) are on the same horizontal straight line along the extension direction of the heat exchange tubes (41). An external support member (50) includes a bearing (51) that is rotatably fixed to the outside of one end of a heat exchange tube (41). A circular rotating plate (52) is fixed to the outside of the bearing (51). An annular guide plate (53) is fixed to the inner wall of the housing (11) outside the rotating plate (52). A guide groove (54) is provided on the inner side of the guide plate (53). The rotating plate (52) is stuck inside the guide groove (54). A connecting support (60) is provided, comprising a first mounting plate (61), a first support frame (62) is fixed on the outside of the first mounting plate (61), the other end of the first support frame (62) is fixed on the heat exchange tube (41), the first support frame (62) is located at one end away from the outer support (50), a second mounting plate (63) is provided on the inner side of the middle part of the heat exchange tube (41), a second support frame (64) is fixed on the outside of the second mounting plate (63), the other end of the second support frame (64) is fixed on the heat exchange tube (41), and the first mounting plate (61) and the second mounting plate (63) are both located on the center line of the annularly arranged heat exchange tubes (41); A drive motor (70) is fixed to the outside of the housing (11), and the shaft of the drive motor (70) is coaxially connected to the first mounting plate (61). The heat exchange tube (41) is provided with a material box assembly (80) inside. The material box assembly (80) includes a hollow cylindrical material box (81). The material box (81) is open at one end near the feed pipe (21) and sealed and fixed at the other end on the first support frame (62). The feed pipe (21) extends into the interior of the material box (81). The second support frame (64) passes through the material box (81). The side of the material box (81) is provided with hollowed-out air holes. The outer side of the material box (81) and the heat exchange tube (41) are connected by a support rod (82).

2. The inert gas fire extinguisher for localized fire prevention and extinguishing in mines according to claim 1, characterized in that: A pressure gauge (13) and a concentration sensor (14) are also fixed on the box (11). The pressure gauge (13) and the concentration sensor (14) are both connected to the inside of the box (11) and are used to measure the internal gas pressure and the concentration of inert gas in the box (11), respectively.

3. The inert gas fire extinguisher for localized fire prevention and extinguishing in mines according to claim 1, characterized in that: An air inlet box (32) with an open end is fixed to the outer wall of the box (11). The low-pressure fluid inlet of the ejector (31) is connected to the interior of the air inlet box (32). An exhaust valve (34) is installed at one end of the exhaust pipe (33) located outside the box (11).

4. A mine-use localized fire extinguishing inert gas fire extinguisher according to claim 1, characterized in that: The sealing plate (43) can rotate freely inside the sealing seat (42), and the side of the sealing plate (43) and the sealing seat (42) that are in contact with each other is provided with freely rotating balls (46).

5. A mine-use localized fire extinguishing inert gas fire extinguisher according to claim 1, characterized in that: The feed pipe (21) is inclined upward, and the loading gate (22) is vertical.

6. A mine-use localized fire extinguishing inert gas fire extinguisher according to any one of claims 1-5, characterized in that: The outer casing (11) is wrapped with a layer of heat insulation material, which is one of glass fiber, rock wool, polystyrene foam and polyurethane foam.

7. A mine-use localized fire extinguishing inert gas fire extinguisher according to any one of claims 1-5, characterized in that: The bottom of the box (11) is provided with a support base (90), the box (11) is fixed on the support base (90), and the cross section of the box (11) is annular.

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