阅读说明：本技术 一种地热井双层套管换热装置 (Double-layer sleeve heat exchange device for geothermal well ) 是由 郭谊民 于 2021-07-30 设计创作，主要内容包括：本发明涉及地热换热技术领域,且公开了一种地热井双层套管换热装置,包括外套管、内套管,所述外套管的内部固定套设有内套管,所述外套管的内部固定安装有导流环,所述内套管的外侧固定安装有锥形盘。本发明通过内外套管之间设置锥形盘转筒将水流下方的水蒸气引导到内套管中,来减轻水流向下流动时的水蒸气阻力,利用锥形盘的形状以及外部的绞龙导流片引导水流,为水流旋流形成之前增加初始速度,加快水流转动速度,同时利用进风反向相反的内外扇叶,分别引导气流以及水流,使得中部的向上升的水流在内扇叶的作用下,通过进气孔排到内套管内部,来避免水流下方水蒸气增多聚集,减缓蒸汽阻力,减轻外套管水泵下泵阻力,提高水流换热效率。(The invention relates to the technical field of geothermal heat exchange, and discloses a double-layer sleeve heat exchange device for a geothermal well. According to the invention, the conical disc rotary drum is arranged between the inner sleeve and the outer sleeve to guide steam below water flow into the inner sleeve so as to reduce steam resistance when the water flow flows downwards, the water flow is guided by using the shape of the conical disc and the outer auger guide vane, the initial speed is increased before the water flow rotational flow is formed, the rotating speed of the water flow is accelerated, and simultaneously, the inner fan blade and the outer fan blade with opposite air inlet directions are used for respectively guiding air flow and water flow, so that the water flow ascending in the middle is discharged into the inner sleeve through the air inlet holes under the action of the inner fan blade, thereby avoiding the steam increase and accumulation below the water flow, reducing steam resistance, reducing pump resistance under the water pump of the outer sleeve, and improving the heat exchange efficiency of the water flow.)

1. The utility model provides a double-deck sleeve pipe heat transfer device of geothermal well, includes outer tube (1), interior sleeve pipe (2), its characterized in that: the inside fixed cover of outer tube (1) is equipped with interior sleeve pipe (2), the inside fixed mounting of outer tube (1) has water conservancy diversion ring (3), the outside fixed mounting of interior sleeve pipe (2) has conical disk (4), the upper end of conical disk (4) is at same water flat line with the bottom of water conservancy diversion ring (3), the outside fixed mounting of conical disk (4) has auger water conservancy diversion piece (5), the inside cavity of conical disk (4), and the upper end radius of conical disk (4) is less than the lower extreme, interior sleeve pipe (2) are located the inside of conical disk (4) and have been seted up inlet port (6), the bottom movable mounting of conical disk (4) has rotary drum (7), outer flabellum (8) is installed in the outside of rotary drum (7), flabellum (9) are gone into to the externally mounted of rotary drum (7), outer flabellum (8), interior flabellum (9) are axial-flow impeller, the air inlet face orientation of outer flabellum (8) is close to toper dish (4) place direction, the direction of toper dish (4) is kept away from to the air inlet face orientation of interior flabellum (9), the bottom fixed mounting of rotary drum (7) has connection snap ring (10), sliding installation between connection snap ring (10) and interior sleeve pipe (2), the inside of outer tube (1) is equipped with thread groove (11), the position of thread groove (11) is located the below of toper dish (4).

2. The geothermal well double-layer casing heat exchange device according to claim 1, wherein: the rotary drum (7) is a cylinder with an opening at the upper end and a cylinder with an opening at the lower end and is arranged in the cylinder, the rotary drum (7) comprises a drum wall (71), the top of the drum wall (71) is fixedly connected with an outer ring away from the circle center of the drum wall (71), the outer ring is positioned in the bottom side wall of the conical disc (4), balls (72) are arranged in the upper side wall and the lower side wall of the outer ring, a gap is reserved between the outer ring and the side wall of the conical disc (4), and a circular channel is formed in the conical disc (4) and used for sliding of the balls (72).

3. The geothermal well double-layer casing heat exchange device according to claim 1, wherein: connecting clasp (10) are drawn together connecting rod (101), fixed mounting between the inside lateral wall of the one end of connecting rod (101) and rotary drum (7), the other end of connecting rod (101) and the lateral wall fixed mounting of screens ring, spacing clasp (102) are installed to the upper and lower lateral wall of screens ring, spacing clasp (102) are streamlined with the lateral wall of screens ring, reduce the resistance that rivers flow, and the rivers of being convenient for flow gently.

4. The double-layer casing heat exchange device for the geothermal well according to claim 3, wherein: the shape side sectional view of the limiting clamp ring (102) is the same as that of a leaf, both sides of the limiting clamp ring (102) are streamline, the distances between the convex peaks at both sides of the limiting clamp ring (102) and the axial lead are R1 and R2 respectively, the length of R1 is greater than that of R2, one side where the R1 is located deviates from the clockwise direction of the circumferential rotation of the rotary drum (7), and one side where the R2 is located is opposite to the anticlockwise direction of the circumferential rotation of the rotary drum (7).

5. The geothermal well double-layer casing heat exchange device according to claim 1, wherein: the guide direction of the conical disc (4) and the thread groove (11) to water flow is clockwise.

Technical Field

The invention relates to the technical field of geothermal heat exchange, in particular to a double-layer sleeve heat exchange device for a geothermal well.

Background

In order to supply clean and environment-friendly geothermal energy to building heating, the existing heating equipment in the middle and deep layers mostly uses a double-layer sleeve, cold water for heat exchange flows downwards from a gap between an outer sleeve and an inner sleeve, then the cold water is subjected to high-temperature underground heat exchange to become water with certain heat energy, the water flows upwards from the inner sleeve, as the well depth is between 500 and 4000 meters, a water medium for heat exchange is in a liquid state in an upper region underground, when the well depth is too deep, the heat exchange water medium can generate form change, the liquid state is changed into a gas state, as the water vapor with certain heat flows upwards, the water flow flows downwards, the water vapor flows upwards, impact force is formed between the water flow and the water vapor, the impact force can increase the water delivery energy consumption of a water pump, the water flow speed of the downward flow is slowed down, and the water vapor amount below is increased along with the increase of the water flow above, the pressure increase that makes leads to ascending vapour resistance bigger and bigger, has increased the downward pump water resistance of outer tube water pump, and the unable downflow heat exchange efficiency that can slow down rivers of top rivers.

Disclosure of Invention

Aiming at the defects of the prior middle-deep geothermal heat exchange sleeve in the background technology in the using process, the invention provides a geothermal well double-layer sleeve heat exchange device which has the advantages of reducing steam resistance/outer sleeve water pump water resistance and improving heat exchange efficiency, and solves the problems of heat exchange efficiency reduction and water pump resistance increase caused by water flow down-flow resistance increase caused by water medium gasification in the background technology.

The invention provides the following technical scheme: the utility model provides a double-deck sleeve pipe heat transfer device of geothermal well, includes outer tube, interior sleeve pipe, the fixed cover in inside of outer tube is equipped with interior sleeve pipe, the inside fixed mounting of outer tube has the water conservancy diversion ring, interior sheathed tube outside fixed mounting has the conical disk, the upper end of conical disk and the bottom of water conservancy diversion ring are at same water flat line, the outside fixed mounting of conical disk has the auger water conservancy diversion piece, the inside cavity of conical disk, and the upper end radius of conical disk is less than the lower extreme, interior sleeve pipe is located the inside of conical disk and has seted up the inlet port, the bottom movable mounting of conical disk has the rotary drum, outer flabellum is installed in the outside of rotary drum, the externally mounted of rotary drum has interior flabellum, outer flabellum, interior flabellum are axial-flow impeller, the air inlet face of outer flabellum is towards being close to conical disk place direction, the air inlet face orientation of interior flabellum is kept away from the direction of conical disk, the bottom fixed mounting of rotary drum has the connection snap ring, connect between snap ring and the interior sleeve pipe slidable mounting, the inside of outer tube is equipped with the thread groove, the position of thread groove is located the below of conical disk.

Preferably, the rotating cylinder is a cylinder with an opening at the upper end and an opening at the lower end and is arranged inside, the rotating cylinder comprises a cylinder wall, the top of the cylinder wall is fixedly connected with an outer ring far away from the circle center of the cylinder wall, the outer ring is located in the side wall of the bottom of the conical disc, balls are arranged in the upper side wall and the lower side wall of the outer ring, a gap is reserved between the outer ring and the side wall of the conical disc, and an annular channel is formed in the conical disc and used for sliding of the balls.

Preferably, the connecting snap ring includes the connecting rod, fixed mounting between the one end of connecting rod and the inside lateral wall of rotary drum, the other end of connecting rod and the lateral wall fixed mounting of screens ring, spacing snap ring is installed to the upper and lower lateral wall of screens ring, spacing snap ring is streamlined with the lateral wall of screens ring, reduces the resistance that rivers flow, and the rivers of being convenient for flow gently.

Preferably, the sectional side view of the shape of the limiting snap ring is the same as that of a leaf, both sides of the limiting snap ring are streamline, the distances between the peaks at both sides of the limiting snap ring and the axis are respectively R1 and R2, the length of R1 is greater than that of R2, one side where R1 is located deviates from the clockwise direction of the circumferential rotation of the revolving drum, and one side where R2 is located deviates from the counterclockwise direction of the circumferential rotation of the revolving drum.

Preferably, the direction of the conical disc and the thread groove for guiding the water flow is clockwise.

The invention has the following beneficial effects:

1. according to the invention, the conical disc and the rotary drum are arranged between the inner sleeve and the outer sleeve to guide vapor below water flow into the inner sleeve so as to reduce vapor resistance when the water flow flows downwards, the water flow is guided by using the shape of the conical disc and the outer auger guide vane, the initial speed is increased before the water flow rotational flow is formed, the rotation speed of the water flow is accelerated, and meanwhile, the inner fan blade and the outer fan blade with opposite air inlet directions are used for respectively guiding air flow and water flow, so that the water flow ascending in the middle is discharged into the inner sleeve through the air inlet holes under the action of the inner fan blade, thereby avoiding the increase and accumulation of the vapor below the water flow, reducing the vapor resistance, reducing the pump resistance under the water pump of the outer sleeve, and improving the heat exchange efficiency of the water flow.

2. According to the invention, the bearing capacity of the bottom of the conical disc is reduced by connecting the clamping ring, the conical disc is prevented from being deformed due to pressure caused by long-term rotation of the rotary drum, the shape of the connecting rod is designed, the height of a convex peak of the connecting rod back to the clockwise direction is smaller than the height of a convex peak of the connecting rod right to the clockwise direction, according to the Bernoulli principle, the pressure of the connecting rod close to the clockwise direction is smaller than the pressure of the connecting rod away from the clockwise direction, the rotation of the rotary drum can be accelerated due to the pressure towards the clockwise direction on the connecting rod, the rotating speed of the inner fan blades is accelerated, the discharging speed of vapor to the inner sleeve is improved, and the exhaust efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the drum of the present invention;

FIG. 3 is a schematic view of the structure of FIG. 1 at A according to the present invention;

FIG. 4 is a cross-sectional view of the connection clip ring of the present invention;

FIG. 5 is a schematic side sectional view of the connecting rod of the present invention.

In the figure: 1. an outer sleeve; 2. an inner sleeve; 3. a flow guide ring; 4. a conical disk; 5. a packing auger flow deflector; 6. an air inlet; 7. a rotating drum; 71. a cylinder wall; 72. a ball bearing; 8. an outer fan blade; 9. an inner fan blade; 10. connecting a snap ring; 101. a connecting rod; 102. a limit snap ring; 11. a thread groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a double-layer sleeve heat exchanger for a geothermal well comprises an outer sleeve 1 and an inner sleeve 2, wherein the inner sleeve 2 is fixedly sleeved inside the outer sleeve 1, a flow guide ring 3 is fixedly installed inside the outer sleeve 1, a conical disc 4 is fixedly installed outside the inner sleeve 2, the upper end of the conical disc 4 is at the same level with the bottom end of the flow guide ring 3, an auger flow deflector 5 is fixedly installed outside the conical disc 4, the inner part of the conical disc 4 is hollow, the radius of the upper end of the conical disc 4 is smaller than that of the lower end, a thread is arranged on the inner side of the upper end of the conical disc 4, a matched thread is arranged at the corresponding position of the inner sleeve 2, the direction of the thread is clockwise screwing direction during setting, the conical disc 4 is directly rotated during installation, the conical disc 4 is fixed on the outer side wall of the inner sleeve 2, the conical disc 4 is mainly used for increasing the initial speed of water flow rotation and accelerating the rotation speed of water flow, the inner sleeve 2 is positioned in the conical disc 4 and is provided with an air inlet 6, the bottom end of the conical disc 4 is movably provided with a rotary drum 7, the rotary drum 7 is a cylinder with an opening at the upper end and a lower end and is arranged in the inner part, the rotary drum 7 comprises a drum wall 71, the top of the drum wall 71 is fixedly connected with an outer ring which is far away from the circle center of the drum wall 71, the outer ring is positioned in the bottom side wall of the conical disc 4, balls 72 are arranged in the upper side wall and the lower side wall of the outer ring, a gap is reserved between the outer ring and the side wall of the conical disc 4, an annular channel is arranged on the conical disc 4 and is used for sliding of the balls 72, the drum wall 71 can circumferentially rotate along the axial lead of the drum wall 71 in the side wall of the conical disc 4, the balls 72 can clamp the drum wall 71 to avoid the falling off of the drum wall 71, meanwhile, the contact area between the drum wall 71 and the conical disc 4 is reduced, the friction between the drum wall 71 and the conical disc 4 is prevented from influencing the rotation of the drum wall 71, and the outer fan blades 8 are arranged outside the rotary drum 7, the outer part of the rotary drum 7 is provided with an inner fan blade 9, the outer fan blade 8 and the inner fan blade 9 are both axial-flow type impellers, the air inlet surface of the outer fan blade 8 faces to the direction close to the conical disc 4, the air inlet surface of the inner fan blade 9 faces to the direction far away from the conical disc 4, the wind direction of the axial-flow type impellers is parallel to the axial lead of the rotary drum 7, therefore, the fluid direction at the position of the outer fan blade 8 is from the position close to the conical disc 4 to the position far away from the conical disc 4, the fluid direction at the position of the inner fan blade 9 is opposite to that of the outer fan blade 8 and can flow from the bottom of the rotary drum 7 to the inside of the conical disc 4, the bottom of the rotary drum 7 is fixedly provided with a connecting snap ring 10, the connecting snap ring 10 is slidably arranged with the inner sleeve 2, the connecting snap ring 10 comprises a connecting rod 101, one end of the connecting rod 101 is fixedly arranged with the inner side wall of the rotary drum 7, the other end of the connecting rod 101 is fixedly arranged with the outer side wall of the snap ring, the upper side wall and the lower side wall of the snap ring are provided with a limiting snap ring 102, the outer side walls of the limiting snap ring 102 and the snap ring are streamline-shaped, resistance of water flow is reduced, water flow can flow smoothly and conveniently, threads are arranged on the inner wall of the limiting snap ring 102, when the device is installed, the limiting snap ring 102 inside the rotary drum 7 is a fixed sleeve part and is sleeved on the outer side of the inner sleeve 2 together with the conical disc 4 and the rotary drum 7, the limiting snap ring 102 on the other side is sleeved on the outer side, the bottom of the snap ring 10 is fixedly connected with the bottom, the rotary drum 7 is supported from the bottom, so that the bottom bearing of the conical disc 4 is reduced, the sectional side view of the limiting snap ring 102 is the same as leaves, both sides of the limiting snap ring 102 are streamline-shaped, distances between convex peaks on both sides of the limiting snap ring 102 and an axial lead are respectively R1 and R2, the length of R1 is larger than that of R2, one side of R1 deviates from the clockwise direction of circumferential rotation of the rotary drum 7, one side of R2 deviates from the anticlockwise direction of circumferential rotation of the rotary drum 7 and deviates from Bernoulli distance, the larger the flow velocity is, the smaller the pressure intensity is, because the protruding degree of the side where the R1 is located is smaller than the side where the R2 is located, when water flows from the bottom of the limit snap ring 102 to the upper end, the flow velocity of the side of R2 is greater than the flow velocity of the side of R1, therefore, the pressure intensity of the side of R1 is greater than the pressure intensity of the side of R2, there is a pressure from R1 to R2, the rotation of the limit snap ring 102 is pushed, the rotation of the rotary drum 7 is accelerated, so as to promote the rotation of the inner fan blade 9, the rotation speed of the inner fan blade 9 is increased, the thread groove 11 is arranged inside the outer sleeve 1, the existence of the thread groove 11 causes the water flow to form a rotational flow, the rotational flow accelerates the contact of the water flow with the side wall of the outer sleeve 1, at the same time, the contact area of the outer sleeve 1 with the outer high temperature soil layer, the existence of the rotational flow increases the heat exchange of the water flow with the high temperature soil layer, the position of the thread groove 11 is located below the conical disc 4, the guiding direction of the conical disc 4 and the thread groove 11 to the water flow is clockwise, therefore, when the water medium between the outer sleeve 1 and the inner sleeve 2 flows to the conical disc 4 under the guiding action of the guide ring 3, the water medium rotates at the outer side of the conical disc 4 under the guiding action of the auger guide sheet 5 on the conical disc 4, when the water flow is far away from the bottom end of the conical disc 4, because the liquid has inertia, under the inertia action, the rotating centrifugal force causes the water flow to the area where the thread groove 11 is located at a certain speed, under the guiding action of the thread groove 11, the water flow rotates, when the water flow is arranged, the radius of the outer fan blade 8 can be larger than the bottom radius of the conical disc 4, so that the rotating water flow at the thread groove 11 contacts the outer fan blade 8, the water flow rotates to impact the outer fan blade 8, the rotating drum 7 rotates, the rotation of the outer fan blade 8 can accelerate the outer water flow to flow downwards, and the air inlet direction of the inner fan blade 9 can enable the inner part of the rotating drum 7 to form a negative pressure area, make the vapor of rotary drum 7 below to the inside flow of rotary drum 7, and because rivers are rotatory, can make the air flow towards the center pin direction of interior sleeve pipe 2, so vapor in the outer tube 1 can be concentrated toward the middle part, the hot-air rises, under the wind-force effect of interior flabellum 9, can accelerate the vapor to rise, the inside vapor of rotary drum 7 rises to in the toper dish 4, because interior sleeve pipe 2 is inside to have the vapor of upflow, consequently, can absorb the vapor in the toper dish 4, reduce the air pressure in the toper dish 4, arrange the vapor of rivers below in interior sleeve pipe 2, alleviate the vapor resistance with this, reduce the water pump water resistance, improve rivers heat exchange efficiency.

The using method of the invention is as follows:

the outer side of the inner sleeve 2 is fixedly sleeved with a conical disc 4, a rotary drum 7 and a connecting snap ring 10, the bottom of the connecting snap ring 10 is fixedly provided with a limiting snap ring 102, the conical disc 4 and the inner sleeve 2 are fixed through threads, a plurality of conical discs 4, the rotary drum 7 and the connecting snap ring 10 can be installed during installation, the water temperature is mainly installed after 3000 meters underground, the water temperature is between 90 and 110 ℃, an aqueous medium exists in a steam and hot water state, water flow in the outer sleeve 1 flows onto the conical discs 4 under the guidance of a flow guide ring 3, then the auger flow guide sheet 5 is guided to act and rotates clockwise, under the action of inertia, the water is thrown to a thread groove 11, under the drainage action of the thread groove 11, a rotational flow is formed in a gap between the outer sleeve 1 and the inner sleeve 2, the rotating water flow strikes the outer fan blades 8, the rotary drum 7 rotates clockwise, then the inner fan blades 9 are driven to rotate, and the air inlet direction of the outer fan blades 8 can guide the water flow downwards, and the air inlet direction of interior flabellum 9 can guide the vapor at middle part to flow upwards, make vapor by rotary drum 7, conical disk 4, inlet port 6 guide the inside of interior sleeve pipe 2, reduce vapor flow downward steam resistance, a connection snap ring 10 for supporting rotary drum 7 simultaneously, because the design of shape, when the air current got into inside from the bottom of rotary drum 7, when spacing snap ring 102 flowed through, can produce a clockwise atmospheric pressure, can accelerate the rotation of rotary drum 7, accelerate inside vapor entered into rotary drum 7, accelerate exhaust vapor.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.