Mine underground temperature reduction and waste heat recycling device and method thereof

Abstract

The application relates to the field of mine equipment, and discloses a mine underground temperature reduction and waste heat recycling device and a method thereof, which effectively solve the problem that when the temperature of a waste heat boiler rises to a certain value, the heat transfer effect becomes poor, and the device comprises a mine frame, a mounting plate is arranged in the mine frame, a waste heat recycling assembly is arranged at the top of the mounting plate, the waste heat recycling assembly comprises two bases which are symmetrically arranged at the top of the mounting plate, a waste heat boiler is arranged at the top of the base, a furnace cavity is arranged in the waste heat boiler, a heat exchange spiral groove is arranged in the waste heat boiler, and the heat exchange spiral groove is arranged at the outside of the furnace cavity. The application is provided with two waste heat boilers for air heat absorption work, when the heat absorption medium in the furnace cavity of one waste heat boiler reaches a high temperature, the other waste heat boiler can be started to work, the two waste heat boilers can alternately transfer heat, and the underground temperature reduction effect and the waste heat recycling efficiency are ensured.

Description

Technical Field

[0001] This invention belongs to the field of mining equipment, specifically a device and method for cooling and recovering waste heat in mine shafts. Background Technology

[0002] According to the patent document with authorization announcement number "CN112709616B" and invention title "A Mine Underground Cooling and Waste Heat Recovery System," the description states that: In operation, a first fan drives one or more collection hoods to collect hot gases from the mine. The hot gases are then transported to heat exchange tubes, which enclose a waste heat boiler for auxiliary heating. The heat exchange shell provides good insulation. The waste heat boiler can generate electricity via a steam turbine to drive a generator, and the generated electricity can be supplied to the mine. The equipment used inside the mine reduces operating costs and energy consumption. After heat exchange, the gas is transported by a second fan to a filter box, which purifies and filters dust and impurities from the gas. The filtered and purified gas then enters the blower hood through a delivery pipe. A motor drives a second gear, which in turn drives a first gear, which in turn drives a control lever. The control lever drives a worm gear, which in turn drives a worm wheel, which in turn drives fan blades. The fan blades cause airflow within the blower hood, simultaneously blowing air into the mine and cooling it. However, the following drawbacks still exist:

[0003] Because heat is conducted through a waste heat boiler, when the temperature of the waste heat boiler rises to a certain level, the heat in the air can no longer be transferred to the heat absorption medium inside the waste heat boiler, resulting in the return air temperature remaining high. This leads to poor cooling effect in the mine and a decrease in waste heat recovery efficiency. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a mine well cooling and waste heat recovery device and method, which effectively solves the problem that the heat transfer effect deteriorates when the temperature of the waste heat boiler rises to a certain level.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mine cooling and waste heat recovery device, comprising a mine frame, an installation plate installed inside the mine frame, and a waste heat recovery component installed at the top of the installation plate;

[0006] The waste heat recovery assembly includes two bases symmetrically mounted on the top of an mounting plate. A waste heat boiler is mounted on the top of each base. The waste heat boiler has a furnace cavity inside and a heat exchange spiral groove inside. The heat exchange spiral groove is located on the outside of the furnace cavity. One end of the heat exchange spiral groove has an air inlet groove, and the other end has an air outlet groove. The air inlet grooves on the two waste heat boilers extend to the side of the waste heat boilers that are far apart from each other, and the air outlet grooves on the two waste heat boilers extend to the side of the waste heat boilers that are close to each other. An air inlet heat exchange assembly is mounted on the two bases, and an air inlet control assembly is mounted between the two waste heat boilers.

[0007] Preferably, the air intake heat exchange assembly includes an installation groove on the base, a lower horizontal pipe installed inside the two bases, two connecting pipes symmetrically installed at the top of the lower horizontal pipe, the two connecting pipes being connected to two waste heat boilers respectively, end boxes symmetrically installed at both ends of the lower horizontal pipe, a bottom pipe installed at the bottom of the end box, an air intake pipe installed at the bottom of the bottom pipe, the air intake pipe being located below the mounting plate, an air intake fan installed inside the air intake pipe, a filter cover installed at the bottom of the air intake pipe, a movable inner pipe movably installed inside the lower horizontal pipe, the movable inner pipe being tightly attached to the inner wall of the lower horizontal pipe, two connecting grooves symmetrically installed at the top of the movable inner pipe, a first sliding groove opened at the top of the lower horizontal pipe, the first sliding groove being located between two second connecting pipes, and a sliding rod installed at the top of the movable inner pipe.

[0008] Preferably, the connecting pipe includes a first connecting pipe and a second connecting pipe installed at the top of the lower horizontal pipe. The first connecting pipe and the second connecting pipe are symmetrically installed on both sides of the waste heat boiler. Both the first connecting pipe and the second connecting pipe are L-shaped. One end of the first connecting pipe and one end of the second connecting pipe are connected to the interior of the lower horizontal pipe. The other end of the first connecting pipe and the other end of the second connecting pipe are connected to the air inlet slot and the air outlet slot, respectively. The distance between the two first connecting pipes is less than the length of the movable inner pipe.

[0009] Preferably, the connecting groove includes a first connecting groove and a second connecting groove formed at the top of the movable inner tube. The distance between the first connecting groove and the second connecting groove is the same as the distance between the first connecting pipe and the second connecting pipe. Two internal connecting parts are symmetrically installed inside the movable inner tube. The internal connecting parts are located between the first connecting groove and the second connecting groove. Fixed top rods are installed on the inner walls of the two end boxes on opposite sides. One end of the fixed top rod is inserted into the interior of the movable inner tube, and the other end of the fixed top rod is located on the side of the first connecting pipe closer to the second connecting pipe.

[0010] Preferably, the internal connecting member includes a fixed ring fixedly installed on the inner wall of the movable inner tube. The fixed ring has a central groove in its middle and rod grooves at equal angles. A baffle is provided on the side of the two fixed rings that are far apart from each other. A movable rod is installed at equal angles on the side of the baffle that is close to the fixed ring. The movable rod is movably installed inside the rod groove. An end plate is installed at one end of the movable rod. The end plate is located on the side of the fixed ring that is far away from the baffle. A first spring is installed on the side of the end plate that is close to the fixed ring. One end of the first spring is fixedly connected to the fixed ring.

[0011] Preferably, the air intake control assembly includes an upper horizontal pipe installed between two waste heat boilers, the upper horizontal pipe being located above the lower horizontal pipe. Expansion chambers are formed inside the two waste heat boilers, filled with heated and expanding gas. Both ends of the upper horizontal pipe are connected to the expansion chambers inside the two waste heat boilers. An arc-shaped plate is movably installed inside the upper horizontal pipe, the arc-shaped plate having a semi-circular cross-section. The outer wall of the arc-shaped plate is in close contact with the bottom of the inner wall of the upper horizontal pipe. Two piston plates are symmetrically installed on the arc-shaped plate, their outer walls in close contact with the inner wall of the upper horizontal pipe. A second sliding groove is formed at the bottom end of the upper horizontal pipe, and the top end of a sliding rod passes through the second sliding groove and is fixedly connected to the middle of the top end of the arc-shaped plate. A fan control component is installed at the bottom end of the upper horizontal pipe, and an adaptive adjustment component is installed at the top end of the upper horizontal pipe.

[0012] Preferably, the fan control component includes a conductive rod mounted on a slide rod. Two vertical plates are symmetrically mounted on the front and back of the slide rod. The length of the vertical plates is the same as the length of the second slide groove. The top of the vertical plates is fixedly connected to the bottom wall of the upper horizontal pipe. A first electrical connector is mounted on the two vertical plates. The first electrical connector includes two first contacts symmetrically mounted on one side of the two vertical plates. A second electrical connector is mounted on the two vertical plates. The second electrical connector includes two second contacts symmetrically mounted on one side of the two vertical plates. The two first electrical connectors are electrically connected to the intake fan on the corresponding side. The two second electrical connectors are electrically connected to the intake fan on the corresponding side. The two intake fans are arranged in parallel. The two intake fans are electrically connected to the same battery. The battery is electrically connected to a main switch.

[0013] Preferably, the adaptive adjustment component includes slots at the top of the two piston plates, symmetrically mounted lower fixed boxes at the top of the upper horizontal tube, the lower fixed boxes being connected to the interior of the upper horizontal tube, the distance between the two lower fixed boxes being greater than the distance between the two piston plates, a first movable block being movably mounted inside the lower fixed box, a locking block being mounted at the bottom of the first movable block, the locking block being inserted into the interior of the upper horizontal tube, a pressure-bearing inclined surface being provided on the side of the two locking blocks that are close to each other, a second movable block being provided above the first movable block, the second movable block being movably mounted inside the lower fixed box, two second springs being symmetrically mounted between the second movable block and the first movable block, and a first exhaust hole being evenly provided at the top of the lower fixed box.

[0014] Preferably, the upper fixed box is located above the lower fixed box. Four support columns are installed at the bottom of the upper fixed box, and the support columns are fixedly connected to the top of the lower fixed box. A piston block is movably installed inside the upper fixed box. A pull rod is installed at the bottom of the piston block. The bottom of the pull rod extends into the interior of the lower fixed box and is fixedly connected to the top of the second movable block. Two third springs are symmetrically installed at the bottom of the piston block, and the bottom of the third springs is fixedly connected to the inner bottom wall of the upper fixed box. The space below the piston block is filled with heated expansion gas. Second exhaust holes are evenly opened at the top of the upper fixed box. Heat-conducting rods are symmetrically installed on both sides of the two upper fixed boxes. One end of each heat-conducting rod is inserted into the space below the piston block inside the upper fixed box, and the other end of each heat-conducting rod is inserted into the furnace cavity of the two waste heat boilers.

[0015] Preferably, a method for using a mine downhole cooling and waste heat recovery device is characterized by the following steps:

[0016] S1. The first waste heat boiler starts working. The arc plate and the movable inner tube are both on one side of the working waste heat boiler. At the same time, the air intake fan near one end is powered on, so that the air inside the mine frame enters the heat exchange spiral groove inside the working waste heat boiler and transfers the heat to the heat absorption medium in the furnace cavity.

[0017] S2. Part of the heat passing through the heat exchange spiral groove is transferred to the heat absorption medium, and the other part is transferred to the heated expansion gas in the expansion chamber, which increases the gas pressure of the heated expansion gas.

[0018] S3. When the heat-absorbing medium inside the furnace reaches a high temperature, the gas under the piston block expands to its limit, causing the block to move upward until it disengages from the slot.

[0019] S4. Under the pressure of the heated and expanding gas inside the expansion chamber, the arc plate and the movable inner tube are pushed to move towards another waste heat boiler, opening the other waste heat boiler and simultaneously energizing the intake fan on the other side.

[0020] S5. The two waste heat boilers work alternately according to the above steps.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) In this invention, by setting up two waste heat boilers to absorb heat from the air, when the heat absorption medium in the furnace chamber of one waste heat boiler reaches a high temperature, the other waste heat boiler can be turned on to absorb heat, so that the two waste heat boilers can transfer heat alternately, thereby avoiding the continuous heat absorption of a single waste heat boiler and ensuring the cooling effect and waste heat recovery efficiency of the mine.

[0023] (2) When a waste heat boiler is in use, the arc plate is in a state close to the waste heat boiler, and the corresponding card block is engaged in the slot on the piston plate on the corresponding side. At the same time, the heat-conducting rod on the upper fixed box transfers the temperature in the furnace cavity to the heated expansion gas below the piston block. When the temperature reaches the target state, the piston block moves upward a corresponding distance under the action of air pressure, so that the card block is disengaged from the slot. Under the action of the heated expansion gas in the expansion chamber of the working waste heat boiler, the arc plate and the movable inner tube are pushed towards another waste heat boiler, thereby completing the automatic alternation of waste heat boilers, reducing manual control by staff, and facilitating adaptive adjustment.

[0024] (3) After the arc plate moves, the contact position of the conductive rod on the slide rod changes, so that the conductive rod alternates between contacting the first electrical contact and contacting the second electrical contact. When the conductive rod contacts the first electrical contact, the air intake fan on the corresponding side is turned on. When the conductive rod contacts the second electrical contact, the air intake fan on the other side is turned on. This facilitates synchronous control of the air intake direction. In addition, the air flow direction inside the mounting slot is opposite in the two adjacent stages, which can backflush the filter cover that filters the previous stage in this stage, ensuring the smooth air passage of the filter cover used in the next stage in this stage. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0026] In the attached diagram:

[0027] Figure 1 This is a schematic diagram of the structure of the mine cooling and waste heat recovery device of the present invention;

[0028] Figure 2 This is a schematic diagram of the mine frame structure of the present invention;

[0029] Figure 3 This is a schematic diagram of the waste heat recovery component structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the internal structure of the waste heat boiler of the present invention;

[0031] Figure 5 This is a schematic diagram of the air intake heat exchange component structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the internal connecting component structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the intake control component structure of the present invention;

[0034] Figure 8 This is a schematic diagram of the structure of the fan control component of the present invention;

[0035] Figure 9 This is a schematic diagram of the adaptive adjustment component structure of the present invention;

[0036] In the diagram: 1. Mine frame; 2. Mounting plate; 3. Waste heat recovery assembly; 301. Base; 302. Waste heat boiler; 303. Furnace cavity; 304. Heat exchange spiral groove; 305. Air inlet groove; 306. Air outlet groove; 4. Air inlet heat exchange assembly; 401. Mounting groove; 402. Lower horizontal pipe; 403. Connecting pipe fittings; 4031. First connecting pipe; 4032. Second connecting pipe; 404. End box; 405. 406. Bottom tube; 407. Air intake box; 408. Air intake fan; 409. Filter cover; 410. Movable inner tube; 411. Connecting groove; 4101. First connecting groove; 4102. Second connecting groove; 411. Internal connecting component; 4111. Fixing ring; 4112. Middle groove; 4113. Rod groove; 4114. Movable rod; 4115. Baffle; 4116. End plate; 4117. First spring; 41 2. Fixed top rod; 413. First slide groove; 414. Slide rod; 5. Intake control assembly; 501. Upper horizontal pipe; 502. Expansion chamber; 503. Arc plate; 504. Piston plate; 505. Second slide groove; 506. Fan control component; 5061. Conductive rod; 5062. Vertical plate; 5063. First electrical connector; 5064. Second electrical connector; 507. Adaptive adjustment component; 5071. Slot; 5 072. Lower fixed box; 5073. First movable block; 5074. Locking block; 5075. Pressure inclined surface; 5076. Second movable block; 5077. Second spring; 5078. First vent; 5079. Upper fixed box; 50710. Support column; 50711. Piston block; 50712. Pull rod; 50713. Third spring; 50714. Second vent; 50715. Heat-conducting rod. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Example 1, by Figures 1-9 The present invention includes a mine frame 1, an installation plate 2 installed inside the mine frame 1, and a waste heat recovery component 3 installed on the top of the installation plate 2.

[0039] The waste heat recovery assembly 3 includes two bases 301 symmetrically mounted on the top of the mounting plate 2. A waste heat boiler 302 is mounted on the top of each base 301. The waste heat boiler 302 has a furnace cavity 303 inside and a heat exchange spiral groove 304 inside. The heat exchange spiral groove 304 is located outside the furnace cavity 303. One end of the heat exchange spiral groove 304 has an air inlet groove 305, and the other end has an air outlet groove 306. The air inlet grooves 305 on the two waste heat boilers 302 extend to opposite sides of each other. The air outlet grooves 306 on the two waste heat boilers 302 extend to opposite sides of each other. The air troughs 306 extend to the adjacent sides of the waste heat boilers 302. Air inlet heat exchange components 4 are installed on the two bases 301, and air inlet control components 5 are installed between the two waste heat boilers 302. The two waste heat boilers 302 perform air heat absorption, so that when the heat absorption medium in the furnace chamber 303 of one waste heat boiler 302 reaches a high temperature, the other waste heat boiler 302 can be turned on to perform heat absorption. This allows the two waste heat boilers 302 to transfer heat alternately, thereby avoiding continuous heat absorption by a single waste heat boiler 302 and ensuring the cooling effect and waste heat recovery efficiency in the mine.

[0040] The air intake heat exchange assembly 4 includes a mounting groove 401 formed on the base 301. A lower horizontal pipe 402 is installed inside the two bases 301. Two connecting pipes 403 are symmetrically installed at the top of the lower horizontal pipe 402, and the two connecting pipes 403 are respectively connected to two waste heat boilers 302. End boxes 404 are symmetrically installed at both ends of the lower horizontal pipe 402. A bottom pipe 405 is installed at the bottom end of the end box 404. An air intake pipe 406 is installed at the bottom end of the bottom pipe 405. The air intake pipe 406 is located below the mounting plate 2. An air intake fan 407 is installed inside the air intake pipe 406. A filter cover 408 is installed at the bottom end of the air intake pipe 406. A movable inner pipe 409 is movably installed inside the lower horizontal pipe 402, and the movable inner pipe 409 is tightly attached to the inner wall of the lower horizontal pipe 402. Two connecting grooves 410 are symmetrically installed at the top of the movable inner tube 409. A first sliding groove 413 is opened at the top of the lower horizontal tube 402, and the first sliding groove 413 is located between the two second connecting tubes 4032. A sliding rod 414 is installed at the top of the movable inner tube 409. The connecting pipe 403 includes a first connecting pipe 4031 and a second connecting pipe 4032 installed at the top of the lower horizontal tube 402. The first connecting pipe 4031 and the second connecting pipe 4032 are symmetrically installed on both sides of the waste heat boiler 302. The first connecting pipe 4031 and the second connecting pipe 4032 are both L-shaped. One end of the first connecting pipe 4031 and one end of the second connecting pipe 4032 are connected to the interior of the lower horizontal tube 402. The other end of the first connecting pipe 4031 and the second connecting pipe 4032 are connected to the interior of the lower horizontal tube 402. The other end of 2 is connected to the air inlet slot 305 and the air outlet slot 306 respectively. The distance between the two first connecting pipes 4031 is less than the length of the movable inner pipe 409. The connecting slot 410 includes a first connecting slot 4101 and a second connecting slot 4102 opened at the top of the movable inner pipe 409. The distance between the first connecting slot 4101 and the second connecting slot 4102 is the same as the distance between the first connecting pipe 4031 and the second connecting pipe 4032. Two internal connecting parts 411 are symmetrically installed inside the movable inner pipe 409. The internal connecting parts 411 are located between the first connecting slot 4101 and the second connecting slot 4102. Fixed top rods 412 are installed on the inner walls of the two end boxes 404 on the side away from each other. One end of the fixed top rod 412 is inserted into the movable inner pipe 409. Inside the inner tube 409, with one end of the fixed top rod 412 located on the side of the first connecting tube 4031 near the second connecting tube 4032, the internal connecting member 411 includes a fixed ring 4111 fixedly installed on the inner wall of the movable inner tube 409. A central groove 4112 is formed in the middle of the fixed ring 4111, and rod grooves 4113 are formed at equal angles on the fixed ring 4111. A baffle 4115 is provided on the side of the two fixed rings 4111 that is far apart from each other. A movable rod 4114 is installed at equal angles on the side of the baffle 4115 near the fixed rings 4111. The movable rod 4114 is movably installed inside the rod groove 4113, and an end plate 4116 is installed at one end of the movable rod 4114. The end plate 4116 is located on the side of the fixed ring 4111 away from the baffle 4115.A first spring 4117 is installed on the end plate 4116 near the fixing ring 4111, and one end of the first spring 4117 is fixedly connected to the fixing ring 4111.

[0041] The air intake control assembly 5 includes an upper horizontal pipe 501 installed between two waste heat boilers 302. The upper horizontal pipe 501 is located above the lower horizontal pipe 402. Expansion chambers 502 are formed inside the two waste heat boilers 302 and are filled with heated expansion gas. Both ends of the upper horizontal pipe 501 are connected to the expansion chambers 502 inside the two waste heat boilers 302. An arc-shaped plate 503 is movably installed inside the upper horizontal pipe 501. The cross-section of the arc-shaped plate 503 is semi-circular. The outer wall of the arc-shaped plate 503 is in close contact with the bottom of the inner wall of the upper horizontal pipe 501. Two piston plates 504 are symmetrically installed on the arc-shaped plate 503. The outer wall of the piston plates 504 is in close contact with the inner wall of the upper horizontal pipe 501. A second sliding groove is formed at the bottom end of the upper horizontal pipe 501. 505, the top end of the slide rod 414 passes through the second slide groove 505 and is fixedly connected to the top center of the arc plate 503. A fan control component 506 is installed at the bottom end of the upper horizontal tube 501, and an adaptive adjustment component 507 is installed at the top end of the upper horizontal tube 501. The fan control component 506 includes a conductive rod 5061 installed on the slide rod 414. Two vertical plates 5062 are symmetrically installed on the front and back of the slide rod 414. The length of the vertical plates 5062 is the same as the length of the second slide groove 505. The top end of the vertical plates 5062 is fixedly connected to the bottom wall of the upper horizontal tube 501. A first electrical contact component 5063 is installed on the two vertical plates 5062. The first electrical contact component 5063 includes two first contacts symmetrically installed on one side of the two vertical plates 5062 that are close to each other. A second electrical contact 5064 is installed on 5062. The second electrical contact 5064 includes two second contacts symmetrically installed on one side of the two vertical plates 5062, close to each other. The two first electrical contacts 5063 are electrically connected to the intake fan 407 on the corresponding side, and the two second electrical contacts 5064 are electrically connected to the intake fan 407 on the corresponding side. The two intake fans 407 are arranged in parallel and electrically connected to the same battery. The battery is electrically connected to a main switch. After the arc plate 503 moves, it drives the contact position of the conductive rod 5061 on the slide rod 414 to change, so that the conductive rod 5061 alternately contacts the first electrical contact 5063 and the second electrical contact 5064. When the conductive rod When 5061 contacts the first electrical contact 5063, the corresponding intake fan 407 is turned on. When the conductive rod 5061 contacts the second electrical contact 5064, the other intake fan 407 is turned on, facilitating synchronous control of the air intake direction. Furthermore, in adjacent stages, the airflow directions within the mounting slot 401 are opposite, allowing for backflushing of the filter hood 408 used in the previous stage, ensuring smooth airflow through the filter hood 408 used in the subsequent stage. The adaptive adjustment component 507 includes slots 5071 at the top of the two piston plates 504. A lower fixing box 5072 is symmetrically installed at the top of the upper horizontal tube 501, and the lower fixing box 5072 is internally connected to the upper horizontal tube 501.The distance between the two lower fixed boxes 5072 is greater than the distance between the two piston plates 504. A first movable block 5073 is movably installed inside the lower fixed box 5072. A locking block 5074 is installed at the bottom of the first movable block 5073, and the locking block 5074 is inserted into the upper horizontal tube 501. A pressure-bearing inclined surface 5075 is provided on the side of the two locking blocks 5074 that are close to each other. A second movable block 5076 is provided above the first movable block 5073, and the second movable block 5076 is movably installed inside the lower fixed box 5072. Two second springs 5077 are symmetrically installed between the second movable block 5076 and the first movable block 5073. The top of the lower fixed box 5072 is... A first exhaust port 5078 is evenly spaced. An upper fixed box 5079 is positioned above the lower fixed box 5072. Four support columns 50710 are installed at the bottom of the upper fixed box 5079, and the support columns 50710 are fixedly connected to the top of the lower fixed box 5072. A piston block 50711 is movably installed inside the upper fixed box 5079. A pull rod 50712 is installed at the bottom of the piston block 50711, and the bottom end of the pull rod 50712 extends into the interior of the lower fixed box 5072. The bottom end of the pull rod 50712 is fixedly connected to the top of the second movable block 5076. Two third springs 50713 are symmetrically installed at the bottom of the piston block 50711. The piston block 50711 is fixedly connected to the inner bottom wall of the upper fixed box 5079. The space below the piston block 50711 is filled with heated expansion gas. The top of the upper fixed box 5079 is evenly provided with second exhaust holes 50714. Heat-conducting rods 50715 are symmetrically installed on both sides of the two upper fixed boxes 5079. One end of the two heat-conducting rods 50715 is inserted into the space below the piston block 50711 inside the upper fixed box 5079, and the other end of the two heat-conducting rods 50715 is inserted into the furnace cavity 303 of the two waste heat boilers 302. When one waste heat boiler 302 is in use, the arc plate 503 is in a state close to the waste heat boiler 302, and the corresponding locking block 5074 is engaged. In the corresponding slot 5071 on the piston plate 504, the heat-conducting rod 50715 on the upper fixed box 5079 transfers the temperature inside the furnace cavity 303 to the heated expansion gas below the piston block 50711. When the temperature reaches the target state, the piston block 50711 moves upward a corresponding distance under the action of gas pressure, causing the locking block 5074 to disengage from the slot 5071. Under the action of the heated expansion gas pressure inside the expansion chamber 502 of the working waste heat boiler 302, it pushes the arc plate 503 and the movable inner tube 409 towards another waste heat boiler 302, thereby completing the automatic alternation of the waste heat boilers 302, reducing manual control by operators and facilitating adaptive adjustment.

[0042] Working principle: During use, the locking block 5074 on the side near the first electrical contact 5063 engages in the locking groove 5071 on the corresponding piston plate 504, allowing the waste heat boiler 302 on the corresponding side to directly enter the working state at the beginning stage. Simultaneously, the movable inner tube 409 is located inside the lower horizontal tube 402 near one end of the waste heat boiler 302 on the corresponding side. The connecting groove 410 on the same side of the movable inner tube 409 corresponds to the connecting pipe 403 on the same side of the lower horizontal tube 402, while the connecting groove 410 on the other side corresponds to the lower horizontal tube 402. The horizontal tube 402 is in a staggered state, and the baffle 4115 between the first connecting tube 4031 and the second connecting tube 4032 is subjected to the pressure of the fixed top rod 412, so that the baffle 4115 is in close contact with the fixed ring 4111, while the baffle 4115 on the other side has a certain gap with the fixed ring 4111 under the elastic force of the first spring 4117. At this time, the two ends of the conductive rod 5061 on the slide rod 414 are in contact with the two first electrical components 5063 respectively, so that the air intake fan 407 on the corresponding side is connected to the circuit.

[0043] Turning on the main switch of the equipment powers on the corresponding intake fan 407, causing air inside the mine frame 1 to continuously pass through the filter cover 408 and enter the end box 404 at one end. Then, it enters the movable inner pipe 409 and flows from the first connecting groove 4101 on one side through the first connecting pipe 4031 on the other side into the heat exchange spiral groove 304 inside the waste heat boiler 302 in operation. This allows the air to transfer heat to the heat-absorbing medium inside the furnace chamber 303, and then from the second... The connecting pipe 4032 and the second connecting groove 4102 flow back to the movable inner pipe 409. Since the connecting groove 410 and connecting pipe 403 of the other waste heat boiler 302 are staggered, and there is a gap between the baffle 4115 on the other side and the fixing ring 4111, air can directly enter the end box 404 at the other end from the movable inner pipe 409 and backflush the filter cover 408 on the air inlet pipe 406 at the other end to clean the filter cover 408 on the other side.

[0044] In operation, the heat-absorbing medium in the furnace cavity 303 of the waste heat boiler 302 absorbs heat, thereby reducing the temperature of the return air inside the mine frame 1, thus cooling the inside of the mine frame 1 and completing heat recovery. As the air inside the mine frame 1 continuously passes through the heat exchange spiral groove 304, the temperature of the heat-absorbing medium inside the furnace cavity 303 continuously rises. At the same time, the temperature of the heated expansion gas in the expansion cavity 502 inside the waste heat boiler 302 continuously rises. When the temperature of the heat-absorbing medium inside the furnace cavity 303 reaches a high level, the heat absorption effect on the air inside the mine frame 1 decreases, thus reducing the cooling effect inside the mine frame 1.

[0045] A heat-conducting rod 50715 is installed on the upper fixed box 5079, which can transfer the internal temperature of the furnace cavity 303 to the space below the piston block 50711 inside the upper fixed box 5079. As the temperature rises, the heated gas in the space below the piston block 50711 continuously expands, pushing the piston block 50711 upward. Then, through the pull rod 50712, it pulls the locking block 5074 upward and disengages from the locking groove 5071. As the temperature rises, the gas pressure inside the expansion chamber 502 of the working waste heat boiler 302 continuously increases, but the volume cannot expand due to the locking block 5074 and the locking groove 5071. When the locking block 5074 disengages from the locking groove 5071, the gas pressure... Using this method, the arc plate 503 is pushed towards another waste heat boiler 302 until the side of the slide rod 414 contacts the inner wall of the second slide groove 505 near the other waste heat boiler 302. Then the arc plate 503 stops moving. During the movement, the piston plate 504 near the other waste heat boiler 302 exerts a thrust on the pressure inclined surface 5075 on the other side of the locking block 5074, pushing the locking block 5074 upward. When the piston plate 504 moves to directly below the lower fixed box 5072, the locking block 5074 moves back and locks into the locking groove 5071. At this time, the other waste heat boiler 302 can start working. The original waste heat boiler 302 stops intake and cools down after the heat absorption medium in the furnace cavity 303 performs energy conversion.

[0046] During the movement of the arc plate 503, the sliding rod 414 moves, which in turn moves the movable inner tube 409, causing the connecting pipe 403 and the connecting groove 410 on the other side to align. After the movable inner tube 409 moves, the baffle 4115 on the other side is resisted by the fixed top rod 412 and pressed tightly against the fixed ring 4111. Meanwhile, the baffle 4115 on the side of the waste heat boiler 302 that was originally in operation disengages from the end of the corresponding fixed top rod 412, causing the baffle 4115 to create a gap with the fixed ring 4111 under the elastic force of the first spring 4117. After the sliding rod 414 moves, the two ends of the conductive rod 5061 contact the two second electrical contacts 5064 respectively, energizing and turning on the intake fan 407 on the side closer to the second electrical contacts 5064. This allows air inside the mine frame 1 to enter another heat exchange spiral groove 304, enabling the two waste heat boilers 302 to alternately transfer heat, improving the continuous cooling of the mine shaft and increasing the efficiency of waste heat recovery. At the same time, the airflow direction inside the installation groove 401 is opposite, which can backflush the filter cover 408 used in the previous stage, ensuring smooth airflow through the filter cover 408 used in the next stage. During the movement of the arc plate 503, the conductive rod 5061 on the slide rod 414 moves with the first electrical contact 5063 and the second electrical contact 5064 respectively, which facilitates the start-up of the air intake fan 407 on the corresponding side, so that it can cooperate with the corresponding waste heat boiler 302.

Claims

1. A mine downhole cooling and waste heat recovery device, comprising a mine frame (1), characterized in that: The mine frame (1) is equipped with an installation plate (2), and a waste heat recovery component (3) is installed on the top of the installation plate (2). The waste heat recovery assembly (3) includes two bases (301) symmetrically installed on the top of the mounting plate (2). A waste heat boiler (302) is installed on the top of the base (301). The waste heat boiler (302) has a furnace cavity (303) inside and a heat exchange spiral groove (304) inside. The heat exchange spiral groove (304) is located on the outside of the furnace cavity (303). One end of the heat exchange spiral groove (304) has an air inlet groove (305), and the other end of the heat exchange spiral groove (304) has an air outlet groove (306). The air inlet grooves (305) on the two waste heat boilers (302) extend to the opposite sides of the waste heat boilers (302). The air outlet grooves (305) on the two waste heat boilers (302) extend to the opposite sides of the waste heat boilers (302). 6) Two air intake heat exchange components (4) are installed on the two bases (301) respectively, extending to the adjacent sides of the waste heat boilers (302), and an air intake control component (5) is installed between the two waste heat boilers (302); the air intake heat exchange component (4) includes an installation groove (401) opened on the base (301), a lower horizontal pipe (402) is installed inside the two bases (301), two connecting pipes (403) are symmetrically installed at the top of the lower horizontal pipe (402), the two connecting pipes (403) are respectively connected to the two waste heat boilers (302), end boxes (404) are symmetrically installed at both ends of the lower horizontal pipe (402), and a bottom pipe (405) is installed at the bottom end of the end box (404), and the bottom pipe (405) is... An air inlet pipe (406) is installed at the bottom, located below the mounting plate (2). An air intake fan (407) is installed inside the air inlet pipe (406). A filter cover (408) is installed at the bottom of the air inlet pipe (406). A movable inner pipe (409) is movably installed inside the lower horizontal pipe (402). The movable inner pipe (409) is tightly attached to the inner wall of the lower horizontal pipe (402). Two connecting grooves (410) are symmetrically installed at the top of the movable inner pipe (409). A first sliding groove (413) is opened at the top of the lower horizontal pipe (402). The first sliding groove (413) is located between two second connecting pipes (4032). A sliding rod (414) is installed at the top of the movable inner pipe (409). The connecting pipe (4032) The system includes a first connecting pipe (4031) and a second connecting pipe (4032) installed at the top of the lower horizontal pipe (402). The first connecting pipe (4031) and the second connecting pipe (4032) are symmetrically installed on both sides of the waste heat boiler (302). The first connecting pipe (4031) and the second connecting pipe (4032) are both L-shaped. One end of the first connecting pipe (4031) and one end of the second connecting pipe (4032) are connected to the interior of the lower horizontal pipe (402). The other end of the first connecting pipe (4031) and the other end of the second connecting pipe (4032) are connected to the air inlet groove (305) and the air outlet groove (306) respectively. The distance between the two first connecting pipes (4031) is less than the length of the movable inner pipe (409).The connecting groove (410) includes a first connecting groove (4101) and a second connecting groove (4102) opened at the top of the movable inner tube (409). The distance between the first connecting groove (4101) and the second connecting groove (4102) is the same as the distance between the first connecting pipe (4031) and the second connecting pipe (4032). Two internal connecting parts (411) are symmetrically installed inside the movable inner tube (409). The internal connecting parts (411) are located between the first connecting groove (4101) and the second connecting groove (4102). Fixed top rods (412) are installed on the inner walls of the two end boxes (404) on the side away from each other. One end of the fixed top rod (412) is inserted into the interior of the movable inner tube (409), and one end of the fixed top rod (412) is located on the side of the first connecting pipe (4031) closer to the second connecting pipe (4032).

2. The mine downhole cooling and waste heat recovery device according to claim 1, characterized in that: The internal connecting member (411) includes a fixed ring (4111) fixedly installed on the inner wall of the movable inner tube (409). A central groove (4112) is provided in the middle of the fixed ring (4111). Rod grooves (4113) are provided at equal angles on the fixed ring (4111). A baffle (4115) is provided on the side of the two fixed rings (4111) that is far apart from each other. Movable rods (4113) are installed at equal angles on the side of the baffle (4115) that is close to the fixed rings (4111). 114), the movable rod (4114) is movably installed inside the rod groove (4113). One end of the movable rod (4114) is equipped with an end plate (4116). The end plate (4116) is located on the side of the fixed ring (4111) away from the baffle (4115). A first spring (4117) is installed on the side of the end plate (4116) close to the fixed ring (4111). One end of the first spring (4117) is fixedly connected to the fixed ring (4111).

3. The mine downhole cooling and waste heat recovery device according to claim 2, characterized in that: The air intake control assembly (5) includes an upper horizontal pipe (501) installed between two waste heat boilers (302). The upper horizontal pipe (501) is located above the lower horizontal pipe (402). Expansion chambers (502) are formed inside the two waste heat boilers (302), and the expansion chambers (502) are filled with heated expansion gas. Both ends of the upper horizontal pipe (501) are connected to the expansion chambers (502) inside the two waste heat boilers (302). An arc-shaped plate (503) is movably installed inside the upper horizontal pipe (501). The cross-section of the arc-shaped plate (503) is semi-circular. The outer wall of the arc plate (503) is in close contact with the bottom of the inner wall of the upper horizontal tube (501). Two piston plates (504) are symmetrically installed on the arc plate (503). The outer wall of the piston plate (504) is in close contact with the inner wall of the upper horizontal tube (501). A second sliding groove (505) is provided at the bottom end of the upper horizontal tube (501). The top end of the sliding rod (414) passes through the second sliding groove (505) and is fixedly connected to the middle of the top end of the arc plate (503). A fan control component (506) is installed at the bottom end of the upper horizontal tube (501), and an adaptive adjustment component (507) is installed at the top end of the upper horizontal tube (501).

4. The mine downhole cooling and waste heat recovery device according to claim 3, characterized in that: The fan control component (506) includes a conductive rod (5061) mounted on a slide rod (414). Two vertical plates (5062) are symmetrically mounted on the front and back of the slide rod (414). The length of the vertical plates (5062) is the same as the length of the second slide groove (505). The top of the vertical plates (5062) is fixedly connected to the bottom wall of the upper horizontal pipe (501). A first electrical contact (5063) is mounted on the two vertical plates (5062). The first electrical contact (5063) includes two first contacts symmetrically mounted on one side of the two vertical plates (5062) that are close to each other. A second electrical connector (5064) is installed on each vertical plate (5062). The second electrical connector (5064) includes two second contacts symmetrically installed on one side of the two vertical plates (5062) close to each other. The two first electrical connectors (5063) are electrically connected to the intake fan (407) on the corresponding side. The two second electrical connectors (5064) are electrically connected to the intake fan (407) on the corresponding side. The two intake fans (407) are arranged in parallel. The two intake fans (407) are electrically connected to the same battery. The battery is electrically connected to a main switch.

5. A mine downhole cooling and waste heat recovery device according to claim 4, characterized in that: The adaptive adjustment component (507) includes slots (5071) formed at the top of the two piston plates (504). Lower fixing boxes (5072) are symmetrically installed at the top of the upper horizontal tube (501). The lower fixing boxes (5072) are internally connected to the upper horizontal tube (501). The distance between the two lower fixing boxes (5072) is greater than the distance between the two piston plates (504). A first movable block (5073) is movably installed inside the lower fixing box (5072). A locking block (5074) is installed at the bottom of the first movable block (5073). The block (5074) is inserted into the interior of the upper horizontal tube (501). The two blocks (5074) are provided with a pressure inclined surface (5075) on the side that is close to each other. A second movable block (5076) is provided above the first movable block (5073). The second movable block (5076) is movably installed inside the lower fixed box (5072). Two second springs (5077) are symmetrically installed between the second movable block (5076) and the first movable block (5073). The top of the lower fixed box (5072) is provided with a first exhaust hole (5078).

6. A mine downhole cooling and waste heat recovery device according to claim 5, characterized in that: The upper fixed box (5079) is located above the lower fixed box (5072). Four support columns (50710) are installed at the bottom of the upper fixed box (5079). The support columns (50710) are fixedly connected to the top of the lower fixed box (5072). A piston block (50711) is movably installed inside the upper fixed box (5079). A pull rod (50712) is installed at the bottom of the piston block (50711). The bottom of the pull rod (50712) extends into the interior of the lower fixed box (5072). The bottom of the pull rod (50712) is fixedly connected to the top of the second movable block (5076). Two third blocks are symmetrically installed at the bottom of the piston block (50711). The bottom end of the spring (50713) is fixedly connected to the inner bottom wall of the upper fixed box (5079). The space below the piston block (50711) is filled with heated expansion gas. The top of the upper fixed box (5079) is evenly provided with a second exhaust hole (50714). Heat-conducting rods (50715) are symmetrically installed on both sides of the two upper fixed boxes (5079). One end of the two heat-conducting rods (50715) is inserted into the space below the piston block (50711) inside the upper fixed box (5079). The other end of the two heat-conducting rods (50715) is inserted into the furnace cavity (303) of the two waste heat boilers (302).

7. The method of using a mine downhole cooling and waste heat recovery device according to any one of claims 1-6, characterized in that, The usage steps are as follows: S1. The first waste heat boiler (302) starts working. The arc plate (503) and the movable inner tube (409) are both on one side of the working waste heat boiler (302). At the same time, the air intake fan (407) near one end is powered on, so that the air inside the mine frame (1) enters the heat exchange spiral groove (304) inside the working waste heat boiler (302) and transfers the heat to the heat absorption medium in the furnace cavity (303). S2. Part of the heat passing through the heat exchange spiral groove (304) is transferred to the heat absorption medium, and the other part is transferred to the heated expansion gas in the expansion chamber (502), which increases the gas pressure of the heated expansion gas. S3. When the heat-absorbing medium inside the furnace cavity (303) reaches a high temperature, the heated gas under the piston block (50711) expands to its limit, causing the locking block (5074) to move upward continuously until it disengages from the locking groove (5071). S4. Under the action of the gas pressure of the heated and expanded gas inside the expansion chamber (502), the arc plate (503) and the movable inner tube (409) are pushed to move towards another waste heat boiler (302), opening the other waste heat boiler (302) and simultaneously energizing the intake fan (407) on the other side. S5. The two waste heat boilers (302) work alternately according to the above steps.

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