Geothermal heat exchange system in tunnel

Abstract

The invention relates to the technical field of plate heat exchangers, in particular to a geothermal heat exchange system in a tunnel, which comprises a fixed clamping plate, one side of the fixed clamping plate is symmetrically provided with a water inlet and a water outlet, and the other side of the fixed clamping plate is fixedly connected with two guide rods; the side, away from the fixed clamping plate, of the guide rod is fixedly connected with a supporting column, and the middle of the guide rod is slidably connected with a movable clamping plate. A sliding block can be pushed to move by adjusting a pressing unit, when the sliding block moves into a heat exchange plate, a sealing ring is stressed to extrude an elastic ring, when the sealing ring moves into a sealing groove, water flow cannot be blocked, the water flow can enter the heat exchange plate, the sealing rings on the two sides are alternately extruded through the heat exchange plate, and therefore the heat exchange efficiency is improved. The direction of the adhesive tape does not need to be considered during installation, the time required for installation can be saved, the situation that the heat exchange plates are not alternately installed due to manual installation can be avoided, and the situation that the heat exchange efficiency is reduced due to installation errors is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of plate heat exchangers, in particular to a heat exchange system in a tunnel. Background Art

[0002] Tunnel geothermal technology mainly utilizes the heat energy in high-temperature rocks or hot water deep underground. By digging tunnels underground and arranging heat exchangers in the tunnels, the underground heat energy is transferred to the ground, thereby realizing energy utilization; plate heat exchangers have the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small footprint, easy installation and cleaning, wide application, and long service life; its heat transfer coefficient is 3-5 times higher than that of tubular heat exchangers, and the footprint is one-third of that of tubular heat exchangers, and the heat recovery rate can be as high as over 90%.

[0003] Considering that the equipment needs to be cleaned after long-term use, all the heat exchange plates need to be disassembled for cleaning. Since the working principle of the plate heat exchanger is that cold and hot water are on both sides of the heat exchange plate and heat is exchanged through the heat exchange plate, the rubber strips need to correspond to the water inlets of cold and hot water during installation. Therefore, the heat exchange plates need to be installed alternately during installation. However, if an error occurs during installation and several heat exchange plates are not installed alternately, it may cause uneven amounts of cold and hot water entering, which will not only reduce the heat exchange amount, but also reduce the heat exchange efficiency. Summary of the invention

[0004] The object of the present invention is to provide a heat exchange system for heat in a tunnel to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is an endothermic heat exchange system in a tunnel, comprising a fixed clamping plate, one side of the fixed clamping plate is symmetrically provided with a water inlet and a water outlet, and the other side of the fixed clamping plate is fixedly connected to two guide rods; the guide rod is fixedly connected to a pillar on the side away from the fixed clamping plate, and a movable clamping plate is slidably connected to the middle of the guide rod; a plurality of fixed blocks are fixedly connected to both sides of the fixed clamping plate and the movable clamping plate, and a clamping screw is sleeved in the fixed block; A plurality of heat exchange units are arranged between the fixed clamping plate and the movable clamping plate, and traction grooves are symmetrically opened on the surface of the fixed clamping plate, and a pressing unit is slidably connected in the traction groove; The heat exchange unit includes a heat exchange plate, which is slidably connected to the guide rod, and four water holes are opened on the surface of the heat exchange plate. A sealing groove is opened on one side of the heat exchange plate, and an elastic ring is fixedly connected in the sealing groove, and a sealing ring is fixedly connected to one side of the elastic ring; a sealing strip is fixedly connected to one side of the heat exchange plate, and a sliding block is slidably connected to one side of the heat exchange plate; the sliding block is sealingly and slidably connected to the sealing strip; and the pressing unit is used to push the sliding block.

[0006] Further, a plurality of pressing grooves are formed on one side of the heat exchange plate. A pressing block is slidably connected in the pressing groove. The pressing block is in sliding contact with the sliding block. One side of the pressing block close to the sliding block is an inclined surface. Every two pressing blocks are fixedly connected to a sealing ring.

[0007] Further, three positioning blocks are fixedly connected to the middle of one side of the heat exchange plate, and three positioning grooves are fixedly connected to the middle of the other side of the heat exchange plate. The positioning blocks and the positioning grooves are arranged in a form that is larger in the middle and smaller on both sides, and the positioning blocks are matched with the positioning grooves.

[0008] Further, a plurality of heat equalizing bars are fixedly connected to both sides of the heat exchange plate, and the heat equalizing bars are symmetrically arranged with the middle of the heat exchange plate as the center.

[0009] Further, the sum of the heights of the two heat equalizing bars is shorter than the height of the sealing strip.

[0010] Further, a groove is formed on the surface of the sealing strip, and an elastic strip is fixedly connected in the groove.

[0011] Further, the pressing unit includes an adjusting block which is slidably connected to the traction groove. One side of the adjusting block is fixedly connected to a traction rod; the traction rod is slidably connected to the traction groove. The traction rod is in a shape of Chinese character 'tu' (土), and a plurality of pushing rods are fixedly connected to both sides of the traction rod; On the opposite sides of the fixed clamping plate and the movable clamping plate, pushing grooves are formed. The pushing grooves are slidably connected to the pushing rods; on the side of the pushing rod close to the sliding block, a plurality of pushing blocks are fixedly connected. The pushing blocks are in contact with the sliding block. On the side of the pushing rod close to the sliding block, a plurality of sliding grooves are formed. The sliding grooves are slidably connected to the sliding block. The sliding grooves and the pushing blocks are alternately arranged.

[0012] Further, a vacuum unit is hermetically connected between the fixed clamping plate and the movable clamping plate. The vacuum unit includes a vacuum seat. The fixed clamping plate and the movable clamping plate are hermetically connected to the vacuum seat relatively. The top of the vacuum seat is clamped with a vacuum cover. The top of the vacuum cover is fixedly connected to an air suction port. On the opposite sides of the fixed clamping plate and the movable clamping plate, a plurality of installation grooves are formed. The installation grooves are hermetically slidably connected to the vacuum cover.

[0013] The present invention has the following beneficial effects: 1. The present invention can push the sliding block to move by adjusting the pressing unit. When the sliding block moves into the heat exchange plate, the sealing ring will be forced to squeeze the elastic ring. When the sealing ring moves into the sealing groove, it will not block the water flow, but will allow the water flow to enter the heat exchange plate and alternately squeeze the sealing rings on both sides through the heat exchange plate. The direction of the rubber strip is not required during installation, which can save the time required for installation, avoid manual installation resulting in the heat exchange plate not being installed alternately, and avoid the decrease in heat exchange efficiency due to installation errors.

[0014] 2. In the present invention, when water flows in, it will first flow down smoothly through the upright heat-spreading strips, and when the water moves to the lower part of the heat exchange plate, the water flow rate will be slowed down by the inverted heat-spreading strips, which will make the heat exchange time of the water flow longer, thereby increasing the heat exchange and utilization rate; when the heat-spreading plates are clamped, there will still be a certain gap between the heat-spreading strips. When the water passes through the gap, the flow rate is faster, and after passing through the gap, the space is larger, the water flow rate will decrease, so that the water can exchange heat in a larger space, thereby increasing the heat exchange efficiency.

[0015] 3. In the present invention, when the heat exchange plate is removed, the elastic strip will extend outward, and when the elastic strip is bumped, it will also be deformed by force. Since the elastic strip is elastic, it can rebound to its original shape; when the heat exchange plate is installed, the elastic strip will be forced to retract into the groove, and perform a supplementary sealing function when the sealing strip is not fully fitted. Double sealing can be obtained through the elastic strip to ensure sealing performance. At the same time, when the heat exchange plate is removed, it can extend outward and protect the sealing strip from being bumped. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a schematic diagram of the back structure of the main body of the present invention (excluding the vacuum seat and the vacuum cover); Figure 3 For the present invention Figure 2 A partial enlarged view of the middle part; Figure 4 For the present invention Figure 2 A partial enlarged view of point B in the middle; Figure 5 This is a structural schematic diagram of the heat exchange plate of the present invention; Figure 6 This is a schematic diagram of the back structure of the heat exchange plate of the present invention; Figure 7 It is a partial cross-sectional view of the heat exchange plate of the present invention; Figure 8 This is a schematic diagram of the connection state of the heat exchange plate of the present invention; Fig. 9 For the present invention Figure 8 A partial enlarged view of point C in the middle; Fig.10 It is a structural schematic diagram of the pressing unit of the present invention.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1. fixed splint; 11. water inlet; 12. water outlet; 13. movable splint; 14. fixed block; 141. clamping screw; 15. pillar; 16. guide rod; 2. heat exchange unit; 21. heat exchange plate; 22. sealing strip; 221. elastic strip; 23. heat equalization strip; 24. water outlet; 25. sealing ring; 251. elastic ring; 252. pressing block; 26. sliding block; 27. positioning block; 28. positioning groove; 3. pressing unit; 31. adjusting block; 32. traction rod; 321. traction groove; 33. pushing rod; 331. pushing block; 332. sliding groove; 333. pushing groove; 4. vacuum unit; 41. vacuum seat; 42. vacuum cover; 421. air inlet; 43. mounting groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 10 As shown, the present invention is a heat exchange system for heat in a tunnel, comprising a fixed splint 1, one side of the fixed splint 1 is symmetrically provided with a water inlet 11 and a water outlet 12, and the other side of the fixed splint 1 is fixedly connected with two guide rods 16; the side of the guide rod 16 away from the fixed splint 1 is fixedly connected with a pillar 15, and the middle part of the guide rod 16 is slidably connected with a movable splint 13; a plurality of fixed blocks 14 are fixedly connected to both sides of the fixed splint 1 and the movable splint 13, and a clamping screw 141 is sleeved in the fixed block 14; A plurality of heat exchange units 2 are arranged between the fixed clamping plate 1 and the movable clamping plate 13. The surface of the fixed clamping plate 1 is symmetrically provided with traction grooves 321, and the traction grooves 321 are slidably connected with the pressing units 3. The heat exchange unit 2 includes a heat exchange plate 21, which is slidably connected to the guide rod 16. Four water holes 24 are provided on the surface of the heat exchange plate 21. A sealing groove is provided on one side of the heat exchange plate 21. An elastic ring 251 is fixedly connected in the sealing groove. A sealing ring 25 is fixedly connected to one side of the elastic ring 251. A sealing strip 22 is fixedly connected to one side of the heat exchange plate 21. A sliding block 26 is slidably connected to one side of the heat exchange plate 21. The sliding block 26 is sealingly and slidably connected to the sealing strip 22. The pressing unit 3 is used to push the sliding block 26.

[0021] In this embodiment, considering that the equipment needs to be cleaned after long-term use, the heat exchange plates 21 need to be completely disassembled for cleaning. Since the working principle of the plate heat exchanger is that the cold and hot water are on both sides of the heat exchange plate 21 and heat is exchanged through the heat exchange plate 21, the rubber strips need to correspond to the water inlets 11 of the cold and hot water during installation. Therefore, the heat exchange plates 21 need to be installed alternately during installation. However, if the heat exchange plates 21 are not installed alternately due to errors during installation, the amount of cold water and hot water entering may be uneven, which will not only reduce the heat exchange amount, but also reduce the heat exchange efficiency. When using the device, the heat exchange plates 21 are first placed on the guide rods 16 in sequence, and the movable clamping plate 13 is moved along the guide rods 16 toward the fixed clamping plate 1 by rotating the clamping screw 141. In this process, the gaps between the heat exchange plates 21 are reduced, and the seal strips 22 are used to contact with other heat exchange plates 21, thereby sealing the inside of the heat exchange plates 21. After the heat exchange plate 21 is pressed, the position of the pressing unit 3 can be controlled to push the sliding block 26 to move. When the sliding block 26 moves into the heat exchange plate 21, the sealing ring 25 is forced to squeeze the elastic ring 251. When the sealing ring 25 moves into the sealing groove, it will not block the water flow. At this time, the water flow will enter the heat exchange plate 21 and alternately squeeze the sealing rings 25 on both sides through the heat exchange plate 21, so that the alternation of hot and cold is no longer through the arrangement of the rubber strips, but through squeezing the sealing rings 25, so that the direction of the rubber strips does not need to be considered during installation, which can save the time required for installation; when cleaning the heat exchange plate 21, it can avoid manual installation resulting in the heat exchange plate 21 not being installed alternately, and avoid the decrease in heat exchange efficiency due to installation errors; in the production process, the steps of checking the front and back of the heat exchange plate 21 can be reduced, which can not only reduce the manpower and time required for inspection, but also increase production efficiency; During the heat exchange process, the amount of water entering the heat exchange plate 21 can be adjusted by adjusting the distance moved by the sliding block 26. When the heat exchange efficiency is too high and excess heat is wasted, the sliding block 26 can be adjusted to move outside the heat exchange plate 21. At this time, the sealing ring 25 will move outward again under the force of the elastic ring 251 and reduce the distance between the sealing ring 25 and the heat exchange plate 21, thereby reducing the amount of water entering and reducing the heat exchange efficiency. The heat exchange efficiency can be adjusted according to different situations. At the same time, the amount of water entering can be reduced when the heat exchange efficiency decreases due to problems with the equipment hardware itself. For example, the heat exchange plate 21 accumulates heat after long-term use. By reducing the amount of hot water entering and increasing the amount of cold water entering, the heat utilization and exchange rate can be improved.

[0022] Specifically, a plurality of pressing grooves are opened on one side of the heat exchange plate 21, and a pressing block 252 is slidably connected in the pressing groove. The pressing block 252 is in sliding contact with the sliding block 26, and the side of the pressing block 252 close to the sliding block 26 is an inclined surface, and every two pressing blocks 252 are fixedly connected to the sealing ring 25.

[0023] In this embodiment, it is considered that when the sliding block 26 directly presses the sealing ring 25, the sealing ring 25 may be partially deformed. After long-term use, the height of the deformed sealing ring 25 may be lower than the sealing strip 22. At this time, there will be a gap between the sealing ring 25 and the heat exchange plate 21, and the sealing performance cannot be guaranteed. When in use, the cold and hot liquids may be mixed, which not only causes heat waste, but also affects the heat exchange efficiency. When the pressing unit 3 pushes the sliding block 26, the sliding block 26 will contact the pressing block 252, and the sliding block 26 will press the pressing block 252 to move into the pressing groove. When the pressing block 252 moves, it will drive the sealing ring 25 to move, thereby adjusting the distance between the sealing ring 25 and the heat exchange plate 21, thereby adjusting the water intake; since the sealing ring 25 is driven to move by the pressing block 252, compared with when the sliding block 26 directly presses the sealing ring 25, the contact area between the sealing ring 25 and the pressing block 252 becomes larger. At this time, when the sliding block 26 presses the pressing block 252, the sealing ring 25 will move as a whole, thereby avoiding local deformation of the sealing ring 25, increasing the sealing performance, and at the same time increasing the service life of the sealing ring 25.

[0024] Specifically, three positioning blocks 27 are fixedly connected to the middle of one side of the heat exchange plate 21, and three positioning grooves 28 are fixedly connected to the middle of the other side of the heat exchange plate 21. The positioning blocks 27 and the positioning grooves 28 are arranged in a form of larger in the middle and smaller on both sides, and the positioning blocks 27 and the positioning grooves 28 cooperate with each other.

[0025] In this embodiment, it is considered that the heat exchange plate 21 may not fit with the guide rod 16 due to wear or collision during installation. At this time, the heat exchange plate 21 may be tilted when installed. When the heat exchange plate 21 is tilted, the water openings 24 of the heat exchange plate 21 may not fit completely together, which may cause water leakage at the water opening 24 to mix cold and hot water, thereby reducing the heat exchange efficiency. By setting the positioning block 27 and the positioning groove 28, the position of the heat exchange plate 21 is fixed by matching the positioning block 27 with the positioning groove 28 during installation; considering that when only one positioning block 27 and positioning groove 28 are used, the heat exchange plate 21 may rotate during installation and the angle of the heat exchange plate 21 cannot be fixed. When two positioning blocks 27 and positioning grooves 28 are used, although the heat exchange plate 21 can be prevented from rotating, after long-term use, the positioning block 27 and positioning groove 28 may be worn due to the impact of water flow and lose the positioning and fixing effect; when three positioning blocks 27 and positioning grooves 28 are used, the heat exchange plate 21 can be prevented from rotating. It rotates during installation, and because it is arranged in a form of being larger in the middle and smaller on both sides, during use, when the water flow contacts the positioning block 27 and the positioning groove 28, the larger positioning block 27 and the positioning groove 28 will increase the flow rate due to the longer water flow distance, and the smaller positioning block 27 and the positioning groove 28 will reduce the flow rate. Due to the different flow rates, the two water flows will merge when they contact and generate turbulence, thereby turbulent the water flow and reducing the impact and friction of the water flow on the positioning block 27 and the positioning groove 28; at the same time, the water flow can be slowed down after the water flow is disturbed, so that the water stays in the heat exchange plate 21 for a longer time, thereby making the heat utilization rate higher.

[0026] Specifically, a plurality of heat-spreading strips 23 are fixedly connected to both sides of the heat exchange plate 21 , and the heat-spreading strips 23 are symmetrically arranged with the middle of the heat exchange plate 21 as the central axis.

[0027] In this embodiment, considering that the heat exchange plate 21 can be installed without considering the front and back sides, the heat spreader 23 needs to consider the water flow efficiency and heat exchange efficiency; By arranging the heat equalizing strip 23 symmetrically with the middle of the heat exchange plate 21 as the center axis, since the temperature of the hot water just entering from the water inlet 24 is usually higher and the temperature of the cold water is lower, the heat exchange in the upper half of the heat exchange plate 21 is faster. The water flow in the lower half of the heat exchange plate 21 has a relatively uniform temperature, and the heat exchange efficiency at this time will be slower. Therefore, when the water flows in, it will first flow smoothly through the upright heat equalizing strip 23, and when the water moves to the lower half of the heat exchange plate 21, the water flow rate will be slowed down by the inverted heat equalizing strip 23, which will make the heat exchange time of the water flow longer, thereby increasing the heat exchange and utilization rate.

[0028] Specifically, the sum of the heights of the two heat-saturating strips 23 is shorter than the height of the sealing strip 22 .

[0029] In this embodiment, considering that the soaking bar 23 bulges outwards, although it can increase the area of the soaking plate, enabling more heat to be stored and reducing heat loss, when the movable clamping plate 13 clamps the soaking plate, the soaking bar 23 may be completely attached, and it will block the subsequent flow of water, resulting in a decrease in heat exchange efficiency; By setting the sum of the heights of the soaking bars 23 to be shorter than the height of the sealing strip 22, there will still be a certain gap between the soaking bars 23 after the soaking plates are clamped, and water can pass through. When the water passes through the gap, the flow rate is relatively fast, and after passing through the gap, due to the larger space, the flow rate of the water will decrease, enabling the water to conduct heat exchange at a position with a larger space, thereby increasing the heat exchange efficiency.

[0030] Specifically, the surface of the sealing strip 22 is provided with a groove, and an elastic strip 221 is fixedly connected in the groove.

[0031] In this embodiment, considering that when cleaning or overhauling the heat exchange plate 21, it needs to be removed, and after removal, it may be bumped, etc., which may cause the sealing strip 22 to deform or dent. If the deformation is large, there may still be a gap after pressing the heat exchange plate 21, which may cause liquid leakage; When the heat exchange plate 21 is removed, the elastic strip 221 will protrude outwards and protect the sealing strip 22 during cleaning and overhaul. When the elastic strip 221 is bumped, it will also be deformed by force. Since the elastic strip 221 has elasticity, it can rebound to its original shape; when the heat exchange plate 21 is installed, the elastic strip 221 will be forced to retract into the groove and play a supplementary sealing role when the sealing strip 22 is not completely attached; through the elastic strip 221, double sealing can be obtained, ensuring the sealing performance, and at the same time, when the heat exchange plate 21 is removed, it can protrude outwards and protect the sealing strip 22 from being bumped.

[0032] Specifically, the pressing unit 3 includes an adjusting block 31, the adjusting block 31 is slidably connected to the traction groove 321, and a traction rod 32 is fixedly connected to one side of the adjusting block 31; the traction rod 32 is slidably connected to the traction groove 321, the traction rod 32 is in a cross shape, and a plurality of push rods 33 are fixedly connected to both sides of the traction rod 32; Both sides of the fixed clamping plate 1 opposite to the movable clamping plate 13 are provided with push grooves 333, and the push grooves 333 are slidably connected to the push rods 33; a plurality of push blocks 331 are fixedly connected to the side of the push rod 33 close to the sliding block 26, the push blocks 331 are in contact with the sliding block 26, a plurality of sliding grooves 332 are provided on the side of the push rod 33 close to the sliding block 26, the sliding grooves 332 are in sliding contact with the sliding block 26, and the sliding grooves 332 and the push blocks 331 are alternately arranged.

[0033] In this embodiment, it is considered that when the cold and hot liquids are different, the exchange efficiency of the cold and hot liquids will be different. For example, water has good thermal conductivity, but in a cold environment, cold water may freeze, so it is necessary to use a liquid that is not easy to freeze. At this time, the introduction of different liquids will also make the heat exchange efficiency on both sides of the heat exchange plate 21 different. During heat exchange, the position of the traction rod 32 can be adjusted by pushing the adjustment block 31. When the traction rod 32 moves, it will drive the pushing rod 33 to move. When the pushing rod 33 moves, the pushing block 331 will move, and the pushing block 331 will push the sliding block 26 to move, thereby controlling the distance between the sealing ring 25 and the heat exchange plate 21 and the liquid flow. When the input cold and hot liquids are different, the pushing block 331 can be adjusted, so that the sliding block 26 adjusts the distance between the sealing ring 25 and the heat exchange plate 21, so that the liquid flow and flow rate on both sides of the heat exchange plate 21 are different, which can make the heat utilization rate higher; the alternating arrangement of the sliding groove 332 and the pushing block 331 can make the cold and hot liquids enter the heat exchange plate 21 alternately, thereby eliminating the need to consider the direction of the rubber strip, and making the cold and hot liquids enter the heat exchange plate 21 alternately, making the installation of the heat exchange plate 21 more convenient.

[0034] Specifically, a vacuum unit 4 is sealed between the fixed splint 1 and the movable splint 13, and the vacuum unit 4 includes a vacuum seat 41. The fixed splint 1 and the movable splint 13 are sealed with the vacuum seat 41, and a vacuum cover 42 is clamped on the top of the vacuum seat 41. The top of the vacuum cover 42 is fixedly connected with an air intake port 421. A plurality of mounting grooves 43 are provided on the side opposite to the movable splint 13, and the mounting grooves 43 are sealingly and slidably connected to the vacuum cover 42.

[0035] In this embodiment, considering that when the ambient temperature is low, the heat will flow out through the vapor chamber when the plate heat exchanger is running, which will cause part of the heat to be wasted; During heat exchange, the vacuum seat 41 and the vacuum cover 42 are installed between the fixed clamping plate 1 and the movable clamping plate 13, and cooperate with the installation groove 43 to ensure sealing, and the air is sucked out through the suction port 421 to form a vacuum inside. Since it is difficult for a vacuum to conduct heat, it can prevent internal heat leakage, avoid heat waste, and improve heat utilization. Before heat exchange, the air inside the vacuum seat 41 and the vacuum cover 42 can be sucked out, and whether there is water leakage between the heat exchange plates 21 can be observed, thereby checking the sealing performance of the sealing strip 22. When water leaks during use, the leaked water can also be caught by the sealing seat to reduce the waste of water resources.

[0036] When using, First, when using the equipment, the heat exchange plates 21 are placed on the guide rods 16 in sequence, and the movable clamping plate 13 is moved along the guide rods 16 toward the fixed clamping plate 1 by rotating the clamping screw 141. In this process, the gaps between the heat exchange plates 21 are reduced, and the seal strips 22 are used to contact with other heat exchange plates 21, thereby sealing the inside of the heat exchange plates 21. Before heat exchange, the air inside the vacuum seat 41 and the vacuum cover 42 can be sucked out, and whether there is water leakage between the heat exchange plates 21 can be observed, thereby checking the sealing performance of the sealing strip 22. When water leaks during use, the leaked water can also be caught by the sealing seat to reduce the waste of water resources.

[0037] Secondly, after the heat exchange plate 21 is compressed, the vacuum seat 41 and the vacuum cover 42 are installed between the fixed clamping plate 1 and the movable clamping plate 13, and the vacuum seat 41 and the vacuum cover 42 are matched with the installation groove 43 to ensure the sealing, and the air is sucked out through the suction port 421 to form a vacuum inside. Since it is difficult for a vacuum to conduct heat, it can prevent the internal heat leakage, avoid the waste of heat, and improve the utilization rate of heat. During heat exchange, the position of the traction rod 32 can be adjusted by pushing the adjustment block 31. When the traction rod 32 moves, it will drive the pushing rod 33 to move. When the pushing rod 33 moves, the pushing block 331 will move, and the pushing block 331 will push the sliding block 26 to move, thereby controlling the distance between the sealing ring 25 and the heat exchange plate 21 and the liquid flow rate. When the input cold and hot liquids are different, the pushing block 331 can be adjusted, so that the sliding block 26 adjusts the distance between the sealing ring 25 and the heat exchange plate 21, so that the liquid flow rate and flow rate on both sides of the heat exchange plate 21 are different, which can make the heat utilization rate higher; the alternating arrangement of the sliding groove 332 and the pushing block 331 can make the cold and hot liquids alternately enter the heat exchange plate 21, thereby eliminating the need to consider the direction of the rubber strip, and making the cold and hot liquids alternately enter the heat exchange plate 21, making the installation of the heat exchange plate 21 more convenient; When the sliding block 26 moves into the heat exchange plate 21, the sealing ring 25 is forced to squeeze the elastic ring 251. When the sealing ring 25 moves into the sealing groove, it will not block the water flow. At this time, the water will enter the heat exchange plate 21 and alternately squeeze the sealing rings 25 on both sides through the heat exchange plate 21, so that the alternation of hot and cold is no longer through the arrangement of the rubber strips, but through squeezing the sealing rings 25, so that the direction of the rubber strips does not need to be considered during installation, which can save the time required for installation; when cleaning the heat exchange plate 21, it can avoid manual installation resulting in the heat exchange plate 21 not being installed alternately, and avoid the decrease in heat exchange efficiency due to installation errors; in the production process, the steps of checking the front and back of the heat exchange plate 21 can be reduced, which can not only reduce the manpower and time required for inspection, but also increase production efficiency; During the heat exchange process, the amount of water entering the heat exchange plate 21 can be adjusted by adjusting the distance moved by the sliding block 26. When the heat exchange efficiency is too high and excess heat is wasted, the sliding block 26 can be adjusted to move outside the heat exchange plate 21. At this time, the sealing ring 25 will move outward again under the force of the elastic ring 251 and reduce the distance between the sealing ring 25 and the heat exchange plate 21, thereby reducing the amount of water entering and reducing the heat exchange efficiency. The heat exchange efficiency can be adjusted according to different situations. At the same time, the amount of water entering can be reduced when the heat exchange efficiency decreases due to problems with the equipment hardware itself. For example, the heat exchange plate 21 accumulates heat after long-term use. By reducing the amount of hot water entering and increasing the amount of cold water entering, the heat utilization and exchange rate can be improved.

[0038] Then, when the pressing unit 3 pushes the sliding block 26, the sliding block 26 will contact the pressing block 252, and the sliding block 26 will press the pressing block 252 to move into the pressing groove. When the pressing block 252 moves, it will drive the sealing ring 25 to move, thereby adjusting the distance between the sealing ring 25 and the heat exchange plate 21, thereby adjusting the water inlet; because the sealing ring 25 is driven to move by the pressing block 252, compared with when the sliding block 26 directly presses the sealing ring 25, the contact area between the sealing ring 25 and the pressing block 252 becomes larger. At this time, when the sliding block 26 presses the pressing block 252, the sealing ring 25 will move as a whole, thereby avoiding local deformation of the sealing ring 25, increasing the sealing performance, and at the same time increasing the service life of the sealing ring 25; By arranging the heat equalizing strips 23 symmetrically with the middle of the heat exchange plate 21 as the central axis, since the temperature of the hot water just entering from the water inlet 24 is usually higher and the temperature of the cold water is lower, the heat exchange in the upper half of the heat exchange plate 21 is faster, and the water flow in the lower half of the heat exchange plate 21 has a relatively uniform temperature, so the heat exchange efficiency at this time will be slower. Therefore, when the water flows in, it will first flow smoothly through the upright heat equalizing strips 23, and when the water moves to the lower half of the heat exchange plate 21, the water flow rate will be slowed down by the inverted heat equalizing strips 23, which will make the heat exchange time of the water flow longer, thereby increasing the heat exchange and utilization rate; By setting the sum of the heights of the heat-spreading strips 23 shorter than the height of the sealing strips 22, a certain gap can still be provided between the heat-spreading strips 23 after the heat-spreading plates are clamped, and water can pass through. When water passes through the gap, the flow rate is faster, and after passing through the gap, the flow rate of water decreases due to the larger space, so that water can exchange heat in a larger space, thereby increasing the heat exchange efficiency.

[0039] Finally, when the heat exchange plate 21 is removed, the elastic strip 221 will extend outward and protect the sealing strip 22 during cleaning and maintenance. When the elastic strip 221 is bumped, it will also be deformed by force. Since the elastic strip 221 is elastic, it can rebound to its original shape. When the heat exchange plate 21 is installed, the elastic strip 221 will be forced to retract into the groove and perform a supplementary sealing function when the sealing strip 22 is not completely fitted. Double sealing can be obtained through the elastic strip 221 to ensure sealing performance. At the same time, when the heat exchange plate 21 is removed, it can extend outward and protect the sealing strip 22 from being bumped. By setting the positioning blocks 27 and the positioning grooves 28, the position of the heat exchange plate 21 is fixed by matching the positioning blocks 27 with the positioning grooves 28 during installation; when three positioning blocks 27 and positioning grooves 28 are used, the heat exchange plate 21 can be prevented from rotating during installation, and because they are arranged in a form of a larger middle and smaller two sides, when the water flow contacts the positioning blocks 27 and the positioning grooves 28 during use, the larger positioning blocks 27 and positioning grooves 28 will increase the flow rate due to the longer water flow distance, and the smaller positioning blocks 27 and positioning grooves 28 will reduce the flow rate. Due to the different flow rates, the two water flows will merge when they contact and generate turbulence, thereby causing the water flow to become turbulent and slowing down the impact and friction of the water flow on the positioning blocks 27 and the positioning grooves 28; at the same time, the water flow can be slowed down after the water flow is turbulent, so that the water stays in the heat exchange plate 21 for a longer time, thereby making the heat utilization rate higher.

[0040] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A geothermal heat exchange system in a tunnel, comprising a fixed clamping plate (1). On one side of the fixed clamping plate (1), a water inlet (11) and a water outlet (12) are symmetrically arranged. On the other side of the fixed clamping plate (1), two guide rods (16) are fixedly connected; on the side of the guide rod (16) away from the fixed clamping plate (1), a support column (15) is fixedly connected. The middle part of the guide rod (16) is slidably connected with a movable clamping plate (13); on both sides of the fixed clamping plate (1) and the movable clamping plate (13), a plurality of fixing blocks (14) are fixedly connected, and a clamping screw (141) is sleeved in the fixing block (14). Characterized in that: A plurality of heat exchange units (2) are arranged between the fixed clamping plate (1) and the movable clamping plate (13). On the surface of the fixed clamping plate (1), traction grooves (321) are symmetrically opened, and a pressing unit (3) is slidably connected in the traction grooves (321). The heat exchange unit (2) includes a heat exchange plate (21). The heat exchange plate (21) is slidably connected with the guide rod (16). Four water through holes (24) are opened on the surface of the heat exchange plate (21). A sealing groove is opened on one side of the heat exchange plate (21), and an elastic ring (251) is fixedly connected in the sealing groove. On one side of the elastic ring (251), a sealing ring (25) is fixedly connected; on one side of the heat exchange plate (21), a sealing strip (22) is fixedly connected. On one side of the heat exchange plate (21), a sliding block (26) is slidably connected; the sliding block (26) is in sealed sliding connection with the sealing strip (22); the pressing unit (3) is used to push the sliding block (26).

2. The heat exchange system in a tunnel according to claim 1, characterized in that: A plurality of pressing grooves are opened on one side of the heat exchange plate (21), and a pressing block (252) is slidably connected in the pressing grooves. The pressing block (252) is in sliding contact with the sliding block (26). The side of the pressing block (252) close to the sliding block (26) is an inclined surface. Every two pressing blocks (252) are fixedly connected with the sealing ring (25).

3. The heat exchange system in a tunnel according to claim 1, characterized in that: Three positioning blocks (27) are fixedly connected to the middle part of one side of the heat exchange plate (21), and three positioning grooves (28) are fixedly connected to the middle part of the other side of the heat exchange plate (21). The positioning blocks (27) and the positioning grooves (28) are arranged in a form that is larger in the middle and smaller on both sides, and the positioning blocks (27) cooperate with the positioning grooves (28).

4. The heat exchange system in a tunnel according to claim 1, characterized in that: A plurality of heat equalizing strips (23) are fixedly connected to both sides of the heat exchange plate (21), and the heat equalizing strips (23) are symmetrically arranged with the middle part of the heat exchange plate (21) as the center axis.

5. The heat exchange system in a tunnel according to claim 4, characterized in that: The sum of the heights of the two heat equalizing strips (23) is shorter than the height of the sealing strip (22).

6. The heat exchange system in a tunnel according to claim 1, characterized in that: A groove is opened on the surface of the sealing strip (22), and an elastic strip (221) is fixedly connected in the groove.

7. The heat exchange system in a tunnel according to claim 3, characterized in that: The pressing unit (3) includes an adjusting block (31). The adjusting block (31) is slidably connected with the traction groove (321). On one side of the adjusting block (31), a traction rod (32) is fixedly connected; the traction rod (32) is slidably connected with the traction groove (321). The traction rod (32) is in a T shape, and a plurality of pushing rods (33) are fixedly connected to both sides of the traction rod (32). The fixed splint (1) and the movable splint (13) are each provided with a pushing groove (333) on one side opposite to the other, and the pushing groove (333) is slidably connected to the pushing rod (33); a plurality of pushing blocks (331) are fixedly connected to the side of the pushing rod (33) close to the sliding block (26), and the pushing blocks (331) are in contact with the sliding block (26); a plurality of sliding grooves (332) are provided on the side of the pushing rod (33) close to the sliding block (26), and the sliding grooves (332) are in slidably contact with the sliding block (26), and the sliding grooves (332) and the pushing blocks (331) are alternately arranged.

8. The heat exchange system in a tunnel according to claim 1, characterized in that: A vacuum unit (4) is sealedly connected between the fixed splint (1) and the movable splint (13), and the vacuum unit (4) includes a vacuum seat (41). The fixed splint (1) and the movable splint (13) are sealedly connected to the vacuum seat (41). A vacuum cover (42) is clamped on the top of the vacuum seat (41), and a suction port (421) is fixedly connected to the top of the vacuum cover (42). A plurality of mounting grooves (43) are provided on the side opposite to the movable splint (13), and the mounting grooves (43) are sealingly and slidably connected to the vacuum cover (42).

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