Compact heat exchanger applied to underground hot dry rock mining

Abstract

The invention relates to the technical field of heat exchangers, in particular to a compact heat exchanger applied to underground hot dry rock mining. The heat exchanger comprises a shell, a first partition plate and a second partition plate are fixedly connected in the shell, a plurality of heat exchange modules are arranged between the first partition plate and the second partition plate, and each heat exchange module comprises a plurality of first connecting shells and a plurality of second connecting shells which are arranged on the first partition plate and the second partition plate correspondingly. A plurality of heat exchange shells are arranged between the first connecting shell and the adjacent second connecting shell, and a ring sleeve is arranged between every two adjacent heat exchange shells. Efficient heat exchange of the heat exchanger is achieved through the compactly-arranged heat exchange shells, when a large amount of incrustation is attached to the surfaces of the heat exchange shells, the transmission piece drives the first connecting shell to rotate, the first connecting shell drives the heat exchange shells connected with the first connecting shell to twist and contract, and therefore the incrustation is broken and separated from the heat exchange shells, and rapid cleaning of the incrustation is completed; the heat exchange efficiency of the heat exchanger is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, and in particular to a compact heat exchanger used in underground hot dry rock mining. Background Art

[0002] Heat exchangers are essential key equipment in industrial fields such as power generation, petroleum and chemical industry. The performance of the core component, the heat exchange tube, directly affects the efficiency of the entire system. In heat exchange systems with water as the heat carrier, especially when exploiting underground hot dry rock thermal energy, water is widely used as a medium to conduct and convert underground heat.

[0003] However, as water circulates in underground hot dry rock formations, it dissolves a large amount of calcium and magnesium salts to form brine. When this brine flows through the heat exchanger, the salts will gradually deposit on the surface of the heat exchange tubes, forming scale that is difficult to remove. Over time, the accumulation of scale will not only affect the internal structure of the heat exchanger, but more seriously will cause a significant decrease in heat exchange efficiency, thereby affecting the operating efficiency of the entire system. Summary of the invention

[0004] The present invention provides a compact heat exchanger used in underground hot dry rock mining, so as to overcome the disadvantage that scaling easily occurs in the existing heat exchanger during the heat exchange process, resulting in a decrease in heat exchange efficiency.

[0005] The technical solution is as follows: A compact heat exchanger used for underground hot dry rock mining, comprising: a shell, a first partition and a second partition are fixedly connected in the shell, a plurality of heat exchange modules are arranged between the first partition and the second partition, and the heat exchange modules are used for heat exchange, and the heat exchange modules include: a plurality of first connecting shells and second connecting shells of the same number, which are respectively arranged on the first partition and the second partition, and both are connected to the shell, a plurality of heat exchange shells are arranged between the first connecting shell and the adjacent second connecting shells, a ring sleeve is arranged between two adjacent heat exchange shells, the second connecting shell is provided with a transmission member, the second connecting shell is provided with a limiting groove, the transmission member is provided with a protrusion sliding in the limiting groove, a vibration component is arranged in the ring sleeve for driving the heat exchange shell to vibrate during the twisting process, and a power component is arranged on the shell for driving all the transmission members to move back and forth.

[0006] Preferably, the vibration assembly comprises: a first connecting ring, the first connecting ring is slidably connected to the adjacent ring sleeve, the ring sleeve is fixedly connected with a second connecting ring, the first connecting shell and the heat exchange shell are respectively fixedly connected to the adjacent first connecting ring, the second connecting shell and the heat exchange shell are respectively fixedly connected to the adjacent second connecting ring, the first connecting ring and the second connecting ring are both connected to the ring sleeve, the heat exchange shell and the second connecting shell are respectively connected to the adjacent second connecting ring, the heat exchange shell and the first connecting shell are respectively connected to the adjacent first connecting ring, a corrugated plate is fixedly connected inside the ring sleeve, the first connecting ring is fixedly connected with an extrusion block, the extrusion block is in contact with the corrugated plate, and an elastic rope is fixedly connected between the ring sleeve and the first connecting ring.

[0007] Preferably, a guide rod is fixedly connected to one side of the ring sleeve close to the adjacent first connecting ring, and a curved groove is provided on the first connecting ring. The guide rod slides in the curved groove on the first connecting ring, and the curved groove of the first connecting ring limits the angle of relative rotation between it and the ring sleeve through the guide rod.

[0008] Preferably, the power assembly includes: an electric push rod, the electric push rod is fixed to the shell, the telescopic end of the electric push rod is fixed to a movable frame, the movable frame is sealed and slidably connected to the shell, the movable frame is fixed to lifting plates with the same number as the heat exchange modules, the lifting plates are slidably connected to the shell, and the transmission member is fixed to the adjacent lifting plates.

[0009] Preferably, it also includes: cleaning components, the number of which is the same as the number of the lifting plates, and both are arranged on the first partition and the second partition, for cleaning scale attached to the heat exchange shell, the cleaning component includes: a rotating tube, the rotating tube is rotatably connected to the first partition, the rotating tube is rotatably connected and communicated with the shell, the shell is provided with an electric swivel, the electric swivel is used to drive the rotating tube to rotate, the rotating tube is slidably connected with a cleaning rack, one end of the cleaning rack is communicated with the rotating tube, the cleaning rack is slidably connected to the second partition, the other end of the cleaning rack is communicated with the shell, and a first spring is arranged between the cleaning rack and the second partition, the cleaning rack is located on the moving path of the lifting plate, and the first partition is provided with the same number of limit components as the first connecting shell in the same heat exchange module, and the limit component is used to limit the direction of the first connecting shell.

[0010] Preferably, the limiting groove consists of an arc groove and a straight groove, and the arc groove on the limiting groove is farther away from the second partition plate than the straight groove, and the distance between the straight groove on the limiting groove and the lifting plate is equal to the distance between the cleaning frame and the lifting plate.

[0011] Preferably, the limiting assembly includes: a positioning ring, which is fixedly connected to the first partition, the shell and the first partition are both rotatably and slidably connected to the first connecting shell, the shell and the second partition are both rotatably and slidably connected to the second connecting shell, the positioning ring is rotatably connected to the adjacent first connecting shell, the positioning ring is provided with circumferentially distributed through holes, a limiting rod is fixedly connected to one side of the first connecting shell close to the adjacent positioning ring, the limiting rod limits the first connecting shell through the through hole on the positioning ring, and a second spring is provided between the first connecting shell and the shell, and the second spring is used to push the first connecting shell to reset.

[0012] Preferably, the elastic coefficient of the elastic rope is greater than the elastic coefficient of the second spring.

[0013] Preferably, a limiting ring is provided on the second connecting shell, and the limiting ring limits the moving distance of the second connecting shell through the second partition plate.

[0014] Preferably, the length of the limiting rod is greater than the distance between the limiting ring on the second connecting shell and the second partition plate.

[0015] The beneficial technical effects of the present invention are:

[0016] 1. The present invention realizes efficient heat exchange of the heat exchanger through compactly arranged heat exchange shells. When a large amount of scale adheres to the surface of the heat exchange shell, the first connecting shell is driven to rotate by the transmission member, so that the first connecting shell drives the heat exchange shell connected thereto to twist and shrink, thereby breaking the scale and separating it from the heat exchange shell, thereby completing the rapid cleaning of the scale and ensuring the heat exchange efficiency of the heat exchanger.

[0017] 2. In the process of twisting the heat exchange shell, the corrugated plate and the extrusion block are squeezed against each other, so that the extrusion block drives the heat exchange shell to move back and forth and vibrate, thereby accelerating the speed of scale shedding on the surface of the heat exchange shell, thereby accelerating the cleaning efficiency of the heat exchanger.

[0018] 3. In the process of twisting the heat exchange shell, the scale attached to the surface of the heat exchange shell is rubbed by the cleaning rack, thereby accelerating the shedding of the scale on the surface of the heat exchange shell, thereby further accelerating the cleaning of the scale on the surface of the heat exchange shell and ensuring the heat exchange efficiency of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the heat exchange shell, the ring sleeve and the electric push rod of the present invention;

[0021] Figure 3It is a schematic diagram of the three-dimensional structure of the first connecting shell, the second connecting shell and the second spring of the present invention;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the lifting plate, the electric push rod and the moving frame of the present invention;

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the transmission member, the rotating tube and the cleaning frame of the present invention;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the ring sleeve, the transmission member and the first connecting ring of the present invention;

[0025] Figure 7 It is an exploded view of the three-dimensional structure of the second connecting shell, the transmission member and the limiting groove of the present invention;

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the housing and the second connecting housing of the present invention;

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the first connecting ring, the second connecting ring and the corrugated plate of the present invention;

[0028] Fig.10 It is a schematic diagram of the three-dimensional structure of the corrugated plate, the extruded block and the elastic rope of the present invention.

[0029] Description of reference numerals:

[0030] 1-shell, 2-first partition, 3-second partition, 4-first connecting shell, 5-second connecting shell, 7-heat exchange shell, 8-ring sleeve, 9-lifting plate, 10-transmission member, 1001-limiting groove, 11-first connecting ring, 12-second connecting ring, 13-guide rod, 14-corrugated plate, 15-extrusion block, 16-elastic rope, 17-electric push rod, 18-moving frame, 21-rotating tube, 22-cleaning frame, 23-first spring, 25-positioning ring, 26-limiting rod, 27-second spring. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and beneficial effects of the present invention more clearly understood, the present invention is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. Certain embodiments of the present invention will be described more comprehensively with reference to the accompanying drawings, in which some but not all embodiments will be shown. In fact, the various embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the embodiments described herein; rather, these embodiments are provided so that the present invention meets applicable legal requirements.

[0032] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "back" and the like indicate directions or positional relationships based on directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] A compact heat exchanger for underground hot dry rock mining, such as Figure 1-Figure 8 As shown, it includes: a shell 1, a first partition 2 and a second partition 3 are fixedly connected in the shell 1, a plurality of heat exchange modules are arranged between the first partition 2 and the second partition 3, the heat exchange module is used for heat exchange, and the heat exchange module includes: a plurality of first connecting shells 4 and second connecting shells 5 of the same number, which are respectively arranged on the first partition 2 and the second partition 3, and both are connected to the shell 1, a plurality of heat exchange shells 7 are arranged between the first connecting shell 4 and the adjacent second connecting shell 5, a ring sleeve 8 is arranged between two adjacent heat exchange shells 7, the second connecting shell 5 is provided with a transmission member 10, the second connecting shell 5 is provided with a limiting groove 1001, the transmission member 10 is provided with a protrusion sliding in the limiting groove 1001, a vibration component is arranged in the ring sleeve 8 for driving the heat exchange shell 7 to vibrate during the twisting process, and a power component for driving all the transmission members 10 to move back and forth is arranged on the shell 1.

[0034] The above scheme provides a method for twisting the heat exchange tube after scale appears in the heat exchanger, so that the scale on the heat exchange tube is broken and separated from it; the left and right parts of the shell 1 are respectively provided with a first feed port and a first discharge port, and the shell 1 is provided with a second feed port and a second discharge port at a position between the first partition plate 2 and the second partition plate 3. Liquid storage chambers are provided on the left and right sides of the shell 1, and a sewage outlet is provided at the lower part of the shell 1 for discharging the cleaned scale. The sewage outlet is initially in a closed state. The position between the first partition plate 2 and the second partition plate 3 in the shell 1 is a heat exchange chamber, and the heat exchange chamber is used for the flow of brine extracted from underground hot dry rocks. In this embodiment, taking a single heat exchange module with four first connecting shells 4 and four second connecting shells 5 as an example, the first connecting shell 4 and the shell 1 can be regarded as fixedly connected, and the shell 1 and The second partitions 3 are all rotatably connected to the second connecting shell 5. The two liquid storage chambers in the shell 1, the first connecting shell 4, the second connecting shell 5 and the heat exchange shell 7 and the ring sleeve 8 therebetween form a flow channel for the heat exchange medium, so that the heat exchange medium and the brine can exchange heat. The heat exchange shell 7 is formed by splicing the large diameter sides of two truncated cone shells. The heat exchange shell 7 is made of stainless steel (the stainless steel tube has both high strength and good elastic properties and can recover by itself after a small twist), so that when it is twisted, wrinkles can be generated to separate it from the scale. When the heat exchange shell 7 is twisted, its length will increase, and the adjacent heat exchange shells 7 in the same heat exchange module are staggered, so that the heat exchange structure in the device is compact. In this embodiment, the transmission member 10 can be regarded as a fixed ring. In this embodiment, the limit groove 1001 only has an arc groove, which is used to twist the second connecting shell 5.

[0035] Further, if Figure 6 , Fig. 9 and Fig.10 As shown, the vibration assembly includes: a first connecting ring 11, the first connecting ring 11 is slidably connected to the adjacent ring sleeve 8, the ring sleeve 8 is fixedly connected with a second connecting ring 12, the first connecting shell 4 and the heat exchange shell 7 are respectively fixedly connected to the adjacent first connecting ring 11, the second connecting shell 5 and the heat exchange shell 7 are respectively fixedly connected to the adjacent second connecting ring 12, the first connecting ring 11 and the second connecting ring 12 are both connected to the ring sleeve 8, the heat exchange shell 7 and the second connecting shell 5 are respectively connected to the adjacent second connecting ring 12, the heat exchange shell 7 and the first connecting shell 4 are respectively connected to the adjacent first connecting ring 11, a corrugated plate 14 is fixedly connected in the ring sleeve 8, the first connecting ring 11 is fixedly connected to an extrusion block 15, the extrusion block 15 is in contact with the corrugated plate 14, and an elastic rope 16 is fixedly connected between the ring sleeve 8 and the first connecting ring 11.

[0036] Further, if Fig. 9 and Fig.10As shown, a guide rod 13 is fixedly connected to one side of the ring sleeve 8 close to the adjacent first connecting ring 11, and a curved groove is provided on the first connecting ring 11. The guide rod 13 slides in the curved groove on the first connecting ring 11, and the curved groove of the first connecting ring 11 limits the angle of relative rotation between it and the ring sleeve 8 through the guide rod 13.

[0037] The above scheme provides a method for driving the heat exchange shell 7 to vibrate and remove scale during the twisting process of the heat exchange shell 7; the curved groove on the first connecting ring 11 is used to cause relative rotation between the ring sleeve 8 and the first connecting ring 11; the corrugated plate 14 is used to drive the extrusion block 15 to reciprocate and vibrate through the corrugated surface thereof during the rotation of the extrusion block 15, thereby accelerating the removal of scale on the surface of the heat exchange shell 7; a wavy surface is provided on the side of the extrusion block 15 close to the corrugated plate 14, which is used to increase the relative movement distance between the extrusion block 15 and the corrugated plate 14; the elastic rope 16 is used to drive the ring sleeve 8 and the first connecting ring 11 to rotate and reset, and the elastic rope 16 is always in a stretched state to ensure that the initial positions of the ring sleeve 8 and the first connecting ring 11 remain unchanged.

[0038] Further, if Figure 1-Figure 4 As shown, the power assembly includes: an electric push rod 17, the electric push rod 17 is fixedly connected to the shell 1, the telescopic end of the electric push rod 17 is fixedly connected to a movable frame 18, the movable frame 18 is sealed and slidably connected to the shell 1, the movable frame 18 is fixedly connected to the same number of lifting plates 9 as the heat exchange modules, the lifting plates 9 are slidably connected to the shell 1, and the transmission member 10 is fixedly connected to the adjacent lifting plates 9.

[0039] The above scheme provides a way to drive the lifting plate 9 to move back and forth; initially, the telescopic end of the electric push rod 17 is in an extended state, and a sleeve is provided in the sliding area of ​​the movable frame 18 in the shell 1 to prevent the movable frame 18 from contacting the heat exchange medium, and the lifting plate 9 is used to drive the transmission member 10 to move left and right.

[0040] Working process: When it is necessary to use this device for heat exchange, the staff connects the first feed port and the first discharge port of the device to the heat exchange medium circulation pipeline, so that the heat exchange medium flows through the two liquid storage chambers of the shell 1, the first connecting shell 4, the second connecting shell 5 and the multiple heat exchange shells 7 and the multiple ring sleeves 8 therebetween, and connects the second feed port and the second discharge port on the shell 1 to the brine circulation pipeline, so that the brine flows from left to right in the heat exchange chamber, and the brine and the heat exchange medium exchange heat through the heat exchange shell 7 and the ring sleeve 8.

[0041] After the device has been used for a period of time and a large amount of scale appears on the surface of the heat exchange shell 7, the staff closes the first feed port, the first discharge port and the second discharge port of the shell 1 and opens the sewage outlet. Then the staff starts the electric push rod 17. The telescopic end of the electric push rod 17 drives the lifting plate 9 to move leftward through the moving frame 18. The lifting plate 9 drives the transmission member 10 to move leftward. The transmission member 10 squeezes the limiting groove 1001 through the protrusion thereon, so that the second connecting shell 5 rotates counterclockwise ( Figure 1 (See from right to left), the following text takes the movement of the parts between a single second connecting shell 5 and an adjacent heat exchange shell 7 as a reference, the second connecting shell 5 drives the ring sleeve 8 to rotate synchronously through the second connecting ring 12 thereon, the ring sleeve 8 drives the corrugated plate 14 and the guide rod 13 to rotate counterclockwise relative to the second connecting shell 5 and stretch the elastic rope 16, the guide rod 13 rotates along the curved groove of the ring sleeve 8 until the guide rod 13 can no longer rotate along the curved groove of the ring sleeve 8, the side of the heat exchange shell 7 begins to twist and deform, so that the scale on it breaks and separates from it.

[0042] As the corrugated plate 14 rotates, when the extrusion block 15 contacts the corrugated surface of the corrugated plate 14, the extrusion block 15 moves left and right along the corrugated surface of the corrugated plate 14 under the action of the tension of the elastic rope 16 (in this process, the elastic rope 16 will continue to stretch and shrink), so that the first connecting ring 11 drives the heat exchange shell 7 to move left and right and vibrate, thereby accelerating the shedding of scale thereon, and other heat exchange shells 7 repeat the same action and twist until the telescopic end of the electric push rod 17 stops retracting, the transmission member 10 stops moving and no longer squeezes the second connecting shell 5, and the second connecting shell 5 stops rotating. In this process, the brine entering from the second feed port on the shell 1 impacts the surface of the heat exchange shell 7, causing the surface of the heat exchange shell 7 to be broken and washed by the brine, and then the brine carrying scale is discharged through the drain port. After the scale on the heat exchange shell 7 no longer falls off, the telescopic end of the electric push rod 17 extends out and resets, and the lifting plate 9 drives the transmission member 10 to move rightward and reset, so that the second connecting shell 5 drives the parts thereon to move in the opposite direction and reset. During this process, the elastic rope 16 gradually contracts and drives the first connecting ring 11 and the parts thereon to rotate clockwise relative to the ring sleeve 8 and reset, and the heat exchange shell 7 is reversely deformed and reset. After the telescopic end of the electric push rod 17 is reset, the above operation is repeated to twist and deform the side of the heat exchange shell 7, and the scale attached to the heat exchange shell 7 is cleaned several times. After the scale on the surface of the heat exchange shell 7 is cleaned, the staff closes the sewage outlet and the electric push rod 17, and opens the first feed port, the first discharge port and the second discharge port on the shell 1 to resume the heat exchange work.

[0043] Further, if Figure 4-Figure 6As shown, it also includes: cleaning components, the number of which is the same as the number of lifting plates 9, both of which are arranged on the first partition 2 and the second partition 3, and are used to clean the scale attached to the heat exchange shell 7, the cleaning components include: a rotating tube 21, the rotating tube 21 is rotatably connected to the first partition 2, the rotating tube 21 is rotatably connected and communicated with the shell 1, an electric swivel is arranged on the shell 1, the electric swivel is used to drive the rotating tube 21 to rotate, the rotating tube 21 is slidably connected with a cleaning frame 22, one end of the cleaning frame 22 is communicated with the rotating tube 21, the cleaning frame 22 is slidably connected to the second partition 3, the other end of the cleaning frame 22 is communicated with the shell 1, and a first spring 23 is arranged between the cleaning frame 22 and the second partition 3, the cleaning frame 22 is located on the moving path of the lifting plate 9, and the first partition 2 is provided with the same number of limit components as the first connecting shell 4 in the same heat exchange module, and the limit components are used to limit the direction of the first connecting shell 4.

[0044] Further, if Figure 7 As shown, the limiting groove 1001 is composed of an arc groove and a straight groove, and the arc groove on the limiting groove 1001 is farther away from the second partition 3 than the straight groove, and the distance between the straight groove on the limiting groove 1001 and the lifting plate 9 is equal to the distance between the cleaning frame 22 and the lifting plate 9.

[0045] The above scheme provides a method for assisting in cleaning the scale on the heat exchange shell 7 by external force during the twisting process of the heat exchange shell 7; the electric swivel is an existing device, which is used to drive the rotating tube 21 to rotate, and its internal structure and movement mode are not described in detail. The cross section of the cleaning frame 22 is wavy, which is used to adapt to the shapes of the first connecting shell 4, the second connecting shell 5, the heat exchange shell 7 and the ring sleeve 8. During the rotation of the cleaning frame 22, the lifting plate 9 pushes the cleaning frame 22 to move and approach the side of the heat exchange shell 7 around it, so that the cleaning frame 22 The scale on the heat exchange shell 7 contacts and rubs against the scale on the surrounding heat exchange shell 7, thereby accelerating the cleaning speed of the scale on the heat exchange shell 7. The first spring 23 is used to push the cleaning frame 22 to reset. There is a gap between the cleaning frame 22 and the lifting plate 9, so that after the lifting plate 9 moves to the left for a distance, the lifting plate 9 pushes the cleaning frame 22 to move to the left. In this embodiment, the transmission member 10 is a one-way swivel. When the lifting plate 9 moves to the left, the transmission member 10 does not rotate. When the lifting plate 9 moves to the right, the transmission member 10 rotates along the limiting groove 1001.

[0046] Further, if Figure 3 , Figure 5 , Figure 6 and Fig. 9As shown, the limiting assembly includes: a positioning ring 25, the positioning ring 25 is fixedly connected to the first partition 2, the shell 1 and the first partition 2 are both rotatably and slidably connected to the first connecting shell 4, the shell 1 and the second partition 3 are both rotatably and slidably connected to the second connecting shell 5, the positioning ring 25 is rotatably connected to the adjacent first connecting shell 4, the positioning ring 25 is provided with circumferentially distributed through holes, the first connecting shell 4 is fixedly connected to a limiting rod 26 on one side close to the adjacent positioning ring 25, the limiting rod 26 limits the first connecting shell 4 through the through hole on the positioning ring 25, and a second spring 27 is provided between the first connecting shell 4 and the shell 1, and the second spring 27 is used to push the first connecting shell 4 to reset.

[0047] Further, if Figure 3-Figure 5 and Fig.10 As shown, the elastic constant of the elastic cord 16 is greater than the elastic constant of the second spring 27 .

[0048] Further, if Figure 6 and Figure 7 As shown, a limiting ring is provided on the second connecting shell 5 , and the limiting ring limits the moving distance of the second connecting shell 5 through the second partition plate 3 .

[0049] Further, if Figure 5 and Fig. 9 As shown, the length of the limiting rod 26 is greater than the distance between the upper limiting ring of the second connecting shell 5 and the second partition plate 3, ensuring that the limiting rod 26 will not be separated from the through hole on the positioning ring 25 before the second connecting shell 5 is twisted.

[0050] The above scheme provides a method for driving the heat exchange shell 7 to rotate so that each position of the heat exchange shell 7 can contact the adjacent cleaning rack 22; in this embodiment, the positioning ring 25 is provided with six circumferentially and evenly distributed through holes, and the first connecting shell 4 is fixedly connected with six circumferentially and evenly distributed limit rods 26, and the six limit rods 26 are respectively located in adjacent through holes on the positioning ring 25, which are used to limit the rotation of the first connecting shell 4, so that the position of the first connecting shell 4 is more stable. In this embodiment, the first connecting shell 4 and the first partition plate 2 can slide relative to each other, so that the second connecting shell 5 and the heat exchange shell 7 are close to the adjacent cleaning rack 22 when moving, and the second spring 27 It is used to push the first connecting shell 4 to move and reset, and the elastic coefficient of the second spring 27 is smaller than the elastic coefficient of the elastic rope 16, so that the first connecting shell 4 can move to the left first before the heat exchange shell 7 can be twisted. The limiting ring on the second connecting shell 5 is used to limit its movement distance to prevent the limiting rod 26 from directly moving out of the through hole on the positioning ring 25, resulting in the heat exchange shell 7 being unable to be twisted. One end of the limiting rod 26 is hemispherical, so that the limiting rod 26 can move out of the through hole on the positioning ring 25 after being subjected to extrusion force, and the length of the limiting rod 26 is equal to the sum of the distance between the upper limiting ring of the second connecting shell 5 and the second partition 3 and the radius of the upper hemispherical head of the limiting rod 26.

[0051] Working process: After the above-mentioned electric push rod 17 is started, the staff starts the electric swivel, and the electric swivel drives the cleaning frame 22 to rotate through the rotating tube 21. As the telescopic end of the electric push rod 17 is retracted, the moving frame 18 drives the lifting plate 9 to move leftward, and the lifting plate 9 drives the transmission member 10 to move synchronously, so that the protrusion on the transmission member 10 squeezes the limiting groove 1001 on the second connecting shell 5. Since the elastic coefficient of the second spring 27 is less than the elastic coefficient of the elastic rope 16, the second connecting shell 5 drives the parts thereon to move leftward, and the first connecting shell 4 drives the limiting rod 26 to move leftward synchronously. And compress the adjacent second spring 27 until the limiting ring on the second connecting shell 5 contacts the second partition 3, the second connecting shell 5 and the parts thereon stop moving, and the distance between the second connecting shell 5 and the left part of the heat exchange shell 7 and the cleaning rack 22 is reduced, so that the scale on the cleaning rack 22 and the scale on the heat exchange shell 7 and the second connecting shell 5 are gradually rubbed and squeezed. At the same time, after the gap between the cleaning rack 22 and the heat exchange shell 7 is reduced, the impact force of the brine on the scale between the cleaning rack 22 and the heat exchange shell 7 during the flow process is increased, which speeds up the scale shedding, thereby improving the efficiency of scale cleaning.

[0052] After the second connecting shell 5 stops moving to the left, only the hemispherical head of the limiting rod 26 is located in the through hole of the positioning ring 25. As the transmission member 10 continues to move to the left, the projection of the transmission member 10 squeezes the arc groove of the upper limit groove 1001 of the second connecting shell 5, and the second connecting shell 5 drives the parts thereon to rotate counterclockwise ( Figure 1 (from right to left), the heat exchange shell 7 repeats the above process of twisting, contracting and vibrating until the protrusion of the transmission member 10 is separated from the arc groove of the limiting groove 1001, and the second connecting shell 5 stops moving. At this time, the extrusion force between the limiting rod 26 and the positioning ring 25 is greater than the rightward thrust of the second spring 27, and the first connecting shell 4 drives the limiting rod 26 and the parts on it to rotate counterclockwise ( Figure 1 (seen from right to left), the position of the heat exchange shell 7 toward the cleaning rack 22 changes, thereby adjusting the cleaning position of the heat exchange shell 7, so that the cleaning rack 22 can clean all parts of the heat exchange shell 7. When the limiting rod 26 is aligned with the next through hole (in the rotation direction) of the positioning ring 25, the limiting rod 26 enters the through hole under the push of the second spring 27, and the first connecting shell 4 stops rotating.

[0053] After the transmission member 10 is separated from the arc groove of the limiting groove 1001, the transmission member 10 moves to the left along the straight groove of the limiting groove 1001. At this time, the lifting plate 9 contacts the cleaning frame 22, and the lifting plate 9 pushes the cleaning frame 22 to move to the left and compresses the adjacent first spring 23, so that the cleaning frame 22 moves to the left relative to the heat exchange shell 7, so that the first connecting shell 4 and the right part of the heat exchange shell 7 are close to the cleaning frame 22, until the telescopic end of the electric push rod 17 stops retracting, the lifting plate 9 stops moving, the cleaning frame 22 stops moving, and the cleaning frame 22 cleans the adjacent areas of the first connecting shell 4 and the heat exchange shell 7, and then the electric push rod 17 stops retracting. The telescopic end of 7 is extended and reset, the second connecting shell 5 and the parts thereon move to the right, and the first spring 23 pushes the cleaning frame 22 to move to the right and reset. During this process, the ring sleeve 8 drives the parts thereon to rotate counterclockwise under the action of the adjacent elastic rope 16, so that the second connecting shell 5 rotates counterclockwise to the same angle as the first connecting shell 4, until the second connecting shell 5 stops moving, the angle adjustment of the first connecting shell 4 and the second connecting shell 5 and the parts therebetween is completed, and then the telescopic end of the electric push rod 17 repeats the above process and continuously moves back and forth left and right to clean the scale until the scale cleaning is completed, and the staff turns off the turned on electrical components.

[0054] So far, the present embodiment has been described in detail in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the compact heat exchanger of the present invention applied to underground hot dry rock mining. The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A compact heat exchanger for underground hot dry rock mining, characterized in that: The invention comprises: a shell (1), a first partition (2) and a second partition (3) are fixedly connected in the shell (1), a plurality of heat exchange modules are arranged between the first partition (2) and the second partition (3), the heat exchange modules are used for heat exchange, the heat exchange modules comprise: a plurality of first connecting shells (4) and second connecting shells (5) of the same number, which are arranged on the first partition (2) and the second partition (3), respectively, and both are connected to the shell (1), a first connecting shell (4) and an adjacent second connecting shell (5) are arranged between the first connecting shell (4) and the adjacent second connecting shell (5); A plurality of heat exchange shells (7) are arranged, a ring sleeve (8) is arranged between two adjacent heat exchange shells (7), the second connecting shell (5) is provided with a transmission member (10), the second connecting shell (5) is provided with a limiting groove (1001), the transmission member (10) is provided with a protrusion sliding in the limiting groove (1001), a vibration component is arranged in the ring sleeve (8) for driving the heat exchange shell (7) to vibrate during the twisting process, and a power component is arranged on the shell (1) for driving all the transmission members (10) to move back and forth.

2. A compact heat exchanger for underground hot dry rock mining according to claim 1, characterized in that: The vibration assembly comprises: a first connecting ring (11), the first connecting ring (11) is slidably connected to the adjacent ring sleeve (8), the ring sleeve (8) is fixedly connected to the second connecting ring (12), the first connecting shell (4) and the heat exchange shell (7) are respectively fixedly connected to the adjacent first connecting ring (11), the second connecting shell (5) and the heat exchange shell (7) are respectively fixedly connected to the adjacent second connecting ring (12), the first connecting ring (11) and the second connecting ring (12) are both fixedly connected to the ring sleeve ( 8), the heat exchange shell (7) and the second connecting shell (5) are respectively connected to the adjacent second connecting ring (12), the heat exchange shell (7) and the first connecting shell (4) are respectively connected to the adjacent first connecting ring (11), a corrugated plate (14) is fixedly connected inside the ring sleeve (8), the first connecting ring (11) is fixedly connected to an extrusion block (15), the extrusion block (15) is in contact with the corrugated plate (14), and an elastic rope (16) is fixedly connected between the ring sleeve (8) and the first connecting ring (11).

3. A compact heat exchanger for underground hot dry rock mining according to claim 2, characterized in that: A guide rod (13) is fixedly connected to one side of the ring sleeve (8) adjacent to the first connecting ring (11); a curved sliding groove is provided on the first connecting ring (11); the guide rod (13) is located and slides in the curved sliding groove on the first connecting ring (11); the curved sliding groove of the first connecting ring (11) limits the angle of relative rotation between the first connecting ring (11) and the ring sleeve (8) through the guide rod (13).

4. The compact heat exchanger for underground hot dry rock mining according to claim 1, characterized in that: The power assembly comprises: an electric push rod (17), the electric push rod (17) is fixedly connected to the shell (1), the telescopic end of the electric push rod (17) is fixedly connected to a movable frame (18), the movable frame (18) is sealingly and slidably connected to the shell (1), the movable frame (18) is fixedly connected to the same number of lifting plates (9) as the heat exchange modules, the lifting plates (9) are slidably connected to the shell (1), and the transmission member (10) is fixedly connected to the adjacent lifting plates (9).

5. A compact heat exchanger for underground hot dry rock mining according to claim 4, characterized in that: The heat exchanger (7) further comprises: cleaning components, the number of which is the same as the number of the lifting plates (9), and both are arranged on the first baffle (2) and the second baffle (3), and are used to clean scale attached to the heat exchange shell (7); the cleaning components comprise: a rotating tube (21), the rotating tube (21) is rotatably connected to the first baffle (2), the rotating tube (21) is rotatably connected to and communicated with the shell (1), an electric rotating ring is arranged on the shell (1), the electric rotating ring is used to drive the rotating tube (21) to rotate, the rotating tube (21) is slidably connected to a cleaning frame (22), and the rotating tube (21) is connected to the first baffle (2). One end of the cleaning frame (22) is connected to the rotating tube (21), the cleaning frame (22) is slidably connected to the second partition (3), the other end of the cleaning frame (22) is connected to the shell (1), and a first spring (23) is provided between the cleaning frame (22) and the second partition (3), the cleaning frame (22) is located on the moving path of the lifting plate (9), and the first partition (2) is provided with the same number of limit assemblies as the first connecting shell (4) in the same heat exchange module, and the limit assemblies are used to limit the direction of the first connecting shell (4).

6. A compact heat exchanger for underground hot dry rock mining according to claim 5, characterized in that: The limiting groove (1001) consists of an arc groove and a straight groove, and the arc groove on the limiting groove (1001) is farther away from the second partition plate (3) than the straight groove, and the distance between the straight groove on the limiting groove (1001) and the lifting plate (9) is equal to the distance between the cleaning frame (22) and the lifting plate (9).

7. A compact heat exchanger for underground hot dry rock mining according to claim 5, characterized in that: The limiting assembly comprises: a positioning ring (25), wherein the positioning ring (25) is fixedly connected to the first partition (2); the shell (1) and the first partition (2) are both rotatably and slidably connected to the first connecting shell (4); the shell (1) and the second partition (3) are both rotatably and slidably connected to the second connecting shell (5); the positioning ring (25) is rotatably connected to the adjacent first connecting shell (4); the positioning ring (25) is provided with circumferentially distributed through holes; a limiting rod (26) is fixedly connected to a side of the first connecting shell (4) adjacent to the positioning ring (25); the limiting rod (26) limits the first connecting shell (4) through the through hole on the positioning ring (25); a second spring (27) is provided between the first connecting shell (4) and the shell (1); the second spring (27) is used to push the first connecting shell (4) to reset.

8. The compact heat exchanger used in underground hot dry rock mining according to claim 7, characterized in that: The elastic constant of the elastic rope (16) is greater than the elastic constant of the second spring (27).

9. The compact heat exchanger used for underground hot dry rock mining according to claim 7, characterized in that: A limiting ring is provided on the second connecting shell (5), and the limiting ring limits the moving distance of the second connecting shell (5) through the second partition plate (3).

10. A compact heat exchanger for underground hot dry rock mining according to claim 9, characterized in that: The length of the limiting rod (26) is greater than the distance between the upper limiting ring of the second connecting shell (5) and the second partition plate (3).

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