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CN-121993909-A - High-efficiency reinforced middle-deep geothermal heat exchange tube

CN121993909ACN 121993909 ACN121993909 ACN 121993909ACN-121993909-A

Abstract

The invention relates to the technical field of heat exchange, in particular to a high-efficiency reinforced middle-deep geothermal heat exchange tube, which comprises a heat exchange tube orifice, and a water inlet tube group and a water outlet tube group which are fixedly arranged below the heat exchange tube orifice, wherein the water inlet tube group and the water outlet tube group are formed by butt joint of an upper tube body and a lower tube body. The heat exchange system has the advantages that the heat exchange layer is damaged by periodically disturbing fluid in the internal round table partition cylinder, the convection heat exchange is enhanced by damaging the heat boundary layer, the contact area between the heat exchange layer and rock soil is increased by driving the heat dissipation fins with the external memory metal rod, the heat exchange efficiency is multiplied by double channels, the heat dissipation fins can be unfolded according to the stratum temperature, are retracted at low temperature Duan Bufen, reduce the lowering resistance and are fully unfolded at a high temperature section, and maximize the heat exchange, so that the temperature sensing, the heat exchange enhancement and the mechanical connection are combined through the memory metal rod and the linkage mechanism, and the whole heat exchange pipe system achieves the self-adaption and self-enhancement working state of being hotter, stronger in heat exchange and tighter in the high-temperature working condition of a geothermal well.

Inventors

  • XU FANGJUN
  • MA ZHI
  • YANG JUN
  • XIONG XIN
  • WANG FANG

Assignees

  • 西安深恒节能科技有限公司

Dates

Publication Date
20260508
Application Date
20260311

Claims (10)

  1. 1. The efficient reinforced middle-deep geothermal heat exchange tube comprises a heat exchange tube orifice (1), a water inlet tube group (2) and a water outlet tube group (3) which are fixedly arranged below the heat exchange tube orifice, wherein the water inlet tube group (2) and the water outlet tube group (3) are formed by butt joint of an upper tube body (21) and a lower tube body (21), and the efficient reinforced middle-deep geothermal heat exchange tube is characterized in that a plurality of fixing rings (4) are fixedly arranged on the outer annular wall of each tube body (21), a plurality of heat dissipation fins (41) are hinged on the outer annular wall of each fixing ring (4) in a circumferential array mode, a memory metal rod (42) is arranged between each heat dissipation fin (41) and each fixing ring (4), and the memory metal rod (42) expands or withdraws the heat dissipation fins (41) according to temperature; a plurality of round platform partition cylinders (5) for periodically vortex shedding of the entering liquid are fixedly arranged in the pipe body (21) in a linear array mode; A connecting sleeve (6) is connected between the upper pipe body (21) and the lower pipe body (21) in a threaded manner, a plurality of hook plates (61) matched with the circular platform partition cylinder (5) in the upper pipe body (21) are fixedly arranged on the inner annular wall of the connecting sleeve (6) in a circumferential array manner, extrusion bolts (62) which are in one-to-one correspondence with the hook plates (61) and are used for attaching the hook plates (61) to the circular platform partition cylinder (5) are arranged on the connecting sleeve (6) in a penetrating manner, and connecting assemblies (63) which are in one-to-one correspondence with the hook plates (61) and are fixedly connected with corresponding heat dissipation ribs (41) are slidably arranged in the connecting sleeve (6); when the radiating ribs (41) are unfolded, the extrusion bolts (62) are pulled downwards through the connecting components (63), so that the upper pipe body (21) and the lower pipe body (21) are tightly attached to the connecting sleeve (6).
  2. 2. The heat exchange tube for effectively strengthening middle and deep geothermal heat according to claim 1, wherein the outer annular walls of the tube bodies (21) of the water inlet tube group (2) and the water outlet tube group (3) are fixedly provided with spiral ribs (211), and the truncated cone partition cylinders (5) in the tube bodies (21) of the water inlet tube group (2) and the water outlet tube group (3) are arranged upwards in a small caliber mode.
  3. 3. The high-efficiency reinforced middle-deep geothermal heat exchange tube of claim 1, wherein the horizontal section of the heat dissipation fins (41) is arc-shaped, the lower ends of the heat dissipation fins (41) are conical, and heat-resistant coatings are arranged on the outer sides of the heat dissipation fins (41) and the fixing ring (4).
  4. 4. The heat exchange tube of deep geothermal heat in high-efficient reinforcement of claim 3, wherein the heat dissipation rib (41) and the fixed ring (4) are provided with a mounting component (43), the mounting component (43) comprises a first fixed block (431) fixedly mounted on the heat dissipation rib (41), a second fixed block (432) in one-to-one correspondence with the heat dissipation rib (41) is fixedly mounted on the fixed ring (4), the memory metal rod (42) is fixedly and penetratingly mounted on the corresponding first fixed block (431) and second fixed block (432), and a compression bolt (433) for compressing the memory metal rod (42) is connected to the fixed ring (4) in a threaded manner.
  5. 5. The heat exchange tube of claim 2, wherein the inclined surface of the round table partition cylinder (5) is provided with a plurality of arc water holes (51) for circulating liquid in a circumferential array mode.
  6. 6. The heat exchange tube of claim 1, wherein the upper end of the inner part of the connecting sleeve (6) is provided with an upper threaded interface (601) in threaded fit with the upper tube body (21), and the lower end of the inner part of the connecting sleeve (6) is provided with a lower threaded interface (602) in threaded fit with the lower tube body (21).
  7. 7. The heat exchange tube of claim 2, wherein the hook plate (61) comprises an upper hook plate and a lower attaching plate, the attaching plate is made of flexible metal, and the radian of the upper ends of the hook plate and the round platform partition cylinder (5) is the same.
  8. 8. The heat exchange tube of deep geothermal heat in high-efficient reinforcement of claim 7, wherein the extrusion bolt (62) is threaded through the outer annular wall of the connecting sleeve (6), screw holes (621) corresponding to the extrusion bolts (62) one by one are formed in the outer annular wall of the upper tube body (21), and the extrusion bolts (62) apply transverse locking force to the upper tube body (21) and the connecting sleeve (6).
  9. 9. The heat exchange tube of claim 8, wherein the inner annular wall of the connecting sleeve (6) is provided with a groove positioned at the extrusion bolt (62), the connecting assembly (63) comprises a lantern ring (631) movably arranged in the groove, the lantern ring (631) is sleeved on the extrusion bolt (62), the lantern ring (631) is fixedly provided with a connecting cable (632), the connecting sleeve (6) is provided with a sliding hole matched with the connecting cable (632), and the lower end of the connecting cable (632) is fixedly provided with a stretching cable (633) symmetrical to the connecting cable.
  10. 10. The heat exchange tube of claim 9, wherein the lower end of the stretching cable (633) is fixedly provided with a fixing block (634), and the fixing block (634) is fixedly connected with a side wall of the lower tube body (21) close to the corresponding heat dissipation rib (41) on the lower tube body (21).

Description

High-efficiency reinforced middle-deep geothermal heat exchange tube Technical Field The invention relates to the technical field of heat exchange, in particular to a high-efficiency reinforced middle-deep geothermal heat exchange tube. Background The medium-deep geothermal heat exchange refers to a process of extracting heat energy from a high-temperature rock stratum or geothermal reservoir which is several kilometers deep underground through a special heat exchange system and conveying the heat energy to the ground for use, wherein the process does not usually directly extract underground hot water, but rather utilizes deep high Wen Yanti to heat the fluid by injecting low-temperature fluid into a closed underground heat exchange tube loop, and then returns the warmed fluid to the ground for power generation, heating or industrial heat supply, so that a heat exchange tube is required to absorb rock heat in the geothermal heat exchange process so as to realize the subsequent clean, stable and sustainable geothermal energy source development. The heat exchange tube used in heat exchange of middle-deep geothermal heat still has the following problems that the heat exchange tube used at present is mainly provided with fixed outer fins for increasing the heat exchange area, the outer wall of the heat exchange tube is mainly welded or cast with the fixed fins, the outer diameter of a tube column is increased by the fixed fins, when the heat exchange tube is put down in a narrow well with the depth of thousands of meters, friction resistance is increased rapidly, therefore, the risk that a tube is blocked or a tube body is scratched even cannot be put down to a target depth exists, the size of the fin is fixed, self-adapting adjustment cannot be carried out according to temperature fields with different depths of stratum, meanwhile, the heat exchange tube is mostly connected with traditional threads or flanges, sealing is ensured by means of initial pretightening force, the geothermal well working condition has periodical start-stop and temperature change, repeated expansion and shrinkage of the tube are caused, the pretightening force of the threads or bolts is attenuated under the long-term effect, so that the tube connection loosens or sealing fails, medium leakage is caused, once the connection leakage occurs in a deep well, the pipeline repair cost is extremely high, and even a whole well is required to be scrapped. Disclosure of Invention The invention is provided in view of the problem that the joint of the fixed outer fin, which increases the lowering friction resistance, and the pipe is easy to cause the sealing failure of the pipe when the heat exchange pipe is used in the prior art. In order to solve the technical problems, the invention provides a high-efficiency reinforced middle-deep geothermal heat exchange tube, which is realized by the following specific technical means: the high-efficiency reinforced middle-deep geothermal heat exchange tube comprises a heat exchange tube orifice, a water inlet tube group and a water outlet tube group which are fixedly arranged below the heat exchange tube orifice, wherein the water inlet tube group and the water outlet tube group are formed by butt joint of an upper tube body and a lower tube body, a plurality of fixing rings are fixedly arranged on the outer annular wall of the tube body, a plurality of heat dissipation fins are hinged on the outer annular wall of the fixing rings in a circumferential array mode, and a memory metal rod is arranged between the heat dissipation fins and the fixing rings and is used for expanding or retracting the heat dissipation fins according to the temperature; A plurality of round table partition cylinders for periodically vortex shedding of the entering liquid are fixedly arranged in the tube body in a linear array mode; A connecting sleeve is connected between the upper pipe body and the lower pipe body in a threaded mode, a plurality of hook plates matched with the round platform partition cylinder in the upper pipe body are fixedly arranged on the inner annular wall of the connecting sleeve in a circumferential array mode, extrusion bolts which are in one-to-one correspondence with the hook plates and used for attaching the hook plates to the round platform partition cylinder are arranged on the connecting sleeve in a penetrating mode, connecting components which are in one-to-one correspondence with the hook plates and are fixedly connected with corresponding heat dissipation fins are arranged in the connecting sleeve in a sliding mode, and when the heat dissipation fins are unfolded, the extrusion bolts are pulled downwards through the connecting components, so that the upper pipe body and the lower pipe body are tightly attached to the connecting sleeve. Preferably, spiral ribs are fixedly arranged on the outer annular walls of the pipe bodies of the water inlet pipe group and the water outlet pipe group, and circul