Intelligent monitoring heat exchange device for geothermal heat storage

Abstract

The invention provides an intelligent monitoring heat exchange device for geothermal heat storage. The intelligent monitoring heat exchange device comprises an outer pipe and an inner pipe, the outer pipe comprises a vertical section and a conical section, and the conical section is closed up from top to bottom; a plug is arranged in the conical section; the plug is spherical and comprises a shell, a through hole is formed in the shell, and a balancing weight is arranged in the through hole; the balancing weight is connected with the inner side face of the shell through an elastic piece A, and the size of the balancing weight is smaller than that of the lower end opening of the conical section; when the balancing weight is arranged in the through hole, the plug is spherical, and at the moment, the elastic piece A is in a compressed state; a groove is formed in the side face of the balancing weight, and a blocking strip is rotationally installed in the groove. A circulation opening and an intercepting net are arranged on the side face of the inner pipe, and the intercepting net is located around the circulation opening and can rotate. The heat exchange device has the advantages of being reasonable in design, high in practicability and long in service life. By using the heat exchange device, the influence of underground environment change on the heat exchanger can be reduced, and the utilization rate of geothermal heat storage is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of geothermal heat storage application, and in particular to a geothermal heat storage intelligent monitoring heat exchange device. Background Art

[0002] As a clean and renewable energy, geothermal energy is increasingly used in heating, power generation and other fields. At present, geothermal development mainly uses geothermal energy for heating and cooling, that is, through heat exchange, it provides energy for heating systems, power generation systems, etc., to achieve functions such as cooling, heating, and power generation.

[0003] The patent document with application number 201510212099.6 provides a geothermal heat exchanger including a concentric double-tube structure, which is vertically buried underground and uses an inner tube made of heat-insulating material and an outer tube made of heat-conducting material, which is beneficial to heat preservation of the medium after heat exchange and reduces energy waste; it also discloses that the lower end of the outer tube is closed by a plug and a sealing ring, and the plug is sealed and connected to the lower end of the outer tube by gravity and water pressure; a through hole is opened on the inner tube to prevent mud and sand from entering; the outer tube and the inner tube are connected by a flange, which is easy to install and maintain; the patent provides The heat exchanger uses a through-tube appearance so that it can be installed more than 200 meters underground. The bottom of the outer tube is sealed with a plug to prevent mud from entering the outer tube again, thereby ensuring the heat exchange efficiency of the heat exchanger. However, the following problems still exist: First, as the use time increases, fine mud and sand will invade between the outer tube and the plug. When the water pressure at the bottom of the well rises, the mud may be compressed to cause the plug to move and cause the seal to fail. Second, fine particles and mud will inevitably move with the medium, so they will still be deposited in the inner tube, affecting the medium flow in the inner tube. Summary of the invention

[0004] In view of this, the present invention provides a geothermal heat storage intelligent monitoring heat exchange device, specifically a heat exchange device including a shell and a counterweight, and a rotatable interception net is provided at the flow opening of the inner tube. The heat exchange device has the advantages of reasonable design, strong practicality and long service life.

[0005] The technical solution of the present invention is as follows: A geothermal heat storage intelligent monitoring heat exchange device comprises an outer tube and an inner tube; The outer tube comprises a vertical section and a tapered section, and the tapered section closes from top to bottom; A plug is provided in the conical section; The plug is spherical and includes a shell, a through hole is formed on the shell, and a counterweight is arranged in the through hole; the counterweight is connected to the inner side of the shell through an elastic member A, and the size of the counterweight is smaller than the size of the lower port of the conical section; When the counterweight is placed in the through hole, the blockage is spherical, and the elastic member A is in a compressed state; A groove is provided on the side of the counterweight block, and a stop bar is rotatably installed in the groove; When the plug reaches the conical section of the outer tube and cannot continue to descend, the plug hits the conical section, and the impact loosens the friction between the plug and the through hole, and then the counterweight block is separated from the through hole under the action of the elastic member A, and continues to descend through the conical section under the weight of the counterweight block itself to the outside of the outer tube. In this process, in the absence of pressure from the inner side of the through hole, the baffle opens to both sides; as the descending force of the counterweight block gradually decreases and the contraction force of the elastic member A gradually increases, the baffle is stuck on the bottom surface of the lower port of the conical section; under the cooperation of the baffle and the elastic member A, and the pressure of the medium continuously injected into the inner part from the inlet of the outer tube acting on the top of the plug, the plug can be firmly located in the conical section, and even if the water pressure at the bottom of the well rises, the plug will not fall off from the conical section, which can extend the service life of the heat exchange device; A flow opening and an interception net are provided on the side of the inner tube. The interception net is located around the flow opening and can rotate. When the medium after heat exchange enters from the flow port, the interception net can block the particle impurities; when the medium flows and the amount of particle impurities on different surfaces of the interception net differs, the interception net can rotate, so that the particle impurities attached to its outside will automatically fall off, thereby avoiding the deposition of impurities in the inner tube and keeping the medium in a high flow state for a long time.

[0006] Preferably, the counterweight block is a tungsten alloy block, which will not pollute the well when used.

[0007] Preferably, a magnet A is provided inside the counterweight block, and an annular magnet B is provided on the bottom surface of the lower port of the conical section. The combination of magnet A and magnet B can not only assist the counterweight block to fall off from the through hole, but also help improve the stability of the blockage in the conical section.

[0008] Preferably, an elastic member B is provided between the baffle and the groove. When the counterweight is in the through hole, the elastic member B is in a compressed state; when the counterweight is out of the through hole and reaches the outside of the conical section, the elastic member B returns to a free state, so that the baffle is in an open state.

[0009] Preferably, the baffle is provided with anti-slip teeth, and after the baffle is opened, the anti-slip teeth are in contact with the bottom end of the tapered section.

[0010] Preferably, an arc-shaped protrusion is provided on the tube wall of the outer tube to increase the exchange efficiency between the medium and the ground heat.

[0011] Preferably, an annular groove is provided on the inner tube, and the annular groove is located around the flow port; a limit block is provided on the interception net, and the limit block is located in the annular groove; this arrangement enables the interception net to rotate around the flow port, thereby facilitating the falling off of particulate impurities attached thereto.

[0012] Preferably, the intercepting net is a conical net or an arc-shaped net.

[0013] Preferably, the intercepting net is provided with spoiler fins, and when the medium after heat exchange enters the flow port, the force of the liquid flow acts on the spoiler fins, thereby driving the intercepting net to rotate.

[0014] Preferably, a silicone pad is provided on the inner side of the tapered section. When the seal reaches into the tapered section, the silicone pad is located between the seal and the tapered section, which can improve the stability of the seal in the tapered section.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: through the cooperation of the counterweight block and the baffle strip on the counterweight block, the seal can be effectively fixed inside the tapered section, avoiding the problem of seal failure caused by loosening of the seal or separation from the tapered section when the water pressure in the well rises; by setting an interception net that can rotate around the flow port, the medium after heat exchange can continue to maintain a high flow state to enter the flow port, and the particulate impurities entering the inner tube are reduced as much as possible, thereby ensuring the medium flow rate and improving the utilization efficiency of geothermal heat. The above-mentioned arrangement makes the heat exchange device have the advantages of reasonable design, strong practicality and long service life. The use of this heat exchange device can reduce the impact of changes in the bottom well environment on the heat exchanger and ensure the utilization rate of geothermal heat storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of the heat exchange device.

[0018] Figure 2 This is an enlarged view of the M section.

[0019] Figure 3 This is an enlarged view of part N.

[0020] Figure 4 Schematic diagram of the blocking structure.

[0021] In the figure, 1-outer tube, 101-upright section, 102-conical section, 2-inner tube, 3-blocking, 301-shell, 302-through hole, 303-counterweight, 4-elastic part A, 5-magnet A, 6-magnet B, 7-groove, 8-bar, 9-elastic part B, 10-anti-slip teeth, 11-protrusion, 12-silicone pad, 13-flow port, 14-interception net, 15-annular groove, 16-limiting block, 17-spoiler wing. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with 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 should fall within the scope of protection of the present invention.

[0023] Combination Figure 1-Figure 4 The present invention provides a geothermal heat storage intelligent monitoring heat exchange device, comprising an outer tube 1 and an inner tube 2, wherein the outer tube 1 is provided with a flange A, and the inner tube 2 is provided with a flange B, the inner tube 2 is sleeved in the outer tube 1, and the flange A and the flange B are connected by bolts to realize the connection between the outer tube 1 and the outer tube 2; The outer tube 1 includes a vertical section 101 and a tapered section 102, and the tapered section 102 closes from top to bottom; A plug 3 is provided in the conical section 102; The plug 3 is spherical, and includes a shell 301, a through hole 302 is opened on the shell 301, and a counterweight block 303 is arranged in the through hole 302; the counterweight block 303 is connected to the inner side surface of the shell 301 through an elastic member A4, and the size of the counterweight block 303 is smaller than the size of the lower port of the conical section 102; The counterweight block 303 is a tungsten alloy block and will not pollute the well when in use; When the counterweight 303 is placed in the through hole 302, the plug 3 is spherical, and the elastic member A4 is in a compressed state; A magnet A5 is provided inside the counterweight 303, and a ring magnet B6 is provided on the bottom surface of the lower port of the conical section 102. The magnet A5 and the magnet B6 are used together to not only assist the counterweight 303 to fall off from the through hole 302, but also to assist in improving the stability of the plug 3 in the conical section 102. A groove 7 is provided on the side of the counterweight block 303, and a stop bar 8 is rotatably installed in the groove 7; An elastic member B9 is provided between the stop bar 8 and the groove 7. When the counterweight block 303 is in the through hole 302, the elastic member B9 is in a compressed state; when the counterweight block 303 is separated from the through hole 302 and reaches the outside of the tapered section 102, the elastic member B9 returns to a free state, so that the stop bar 8 is in an open state. The blocking bar 8 is provided with anti-skid teeth 10. When the blocking bar 8 is opened, the anti-skid teeth 10 are in contact with the bottom end of the tapered section 102. In this embodiment, the elastic member A4 and the elastic member B9 are both springs; The vertical section 101 of the outer tube 1 is provided with an arc-shaped protrusion 11 for increasing the exchange efficiency between the medium and the ground heat; A silicone pad 12 is provided on the inner side of the conical section 102. When the plug 3 reaches the conical section 102, the silicone pad 12 is located between the plug 3 and the conical section 102, which can improve the stability of the plug 3 in the conical section 102. When the plug 3 reaches the tapered section 102 of the outer tube 1 and cannot continue to descend, the plug 3 hits the silicone pad 12 of the tapered section 102, and the friction between the plug 3 and the through hole 302 is loosened by the impact. Then, under the action of the elastic member A4, the counterweight 303 is separated from the through hole 302, and the counterweight 303 continues to descend through the tapered section 102 and is located outside the outer tube 1 under its own gravity. In this process, in the absence of pressure from the inner side of the through hole 302, the blocking bar 8 opens to both sides; As the downward force of the counterweight 303 gradually decreases and the contraction force of the elastic member A4 gradually increases, the blocking bar 8 is stuck on the bottom surface of the lower port of the tapered section 102; under the cooperation of the blocking bar 8 and the elastic member A4, and the pressure of the medium continuously injected into the inner part from the inlet of the outer tube 1 on the upper part of the plug 3, the plug 3 can be firmly located in the tapered section 102, and even if the water pressure at the bottom of the well rises, the plug 3 will not fall off from the tapered section 102, which can extend the service life of the heat exchange device; A flow opening 13 and an interception net 14 are provided on the side of the inner tube 2. The interception net 14 is located around the flow opening 13 and is rotatable. An annular groove 15 is provided on the inner tube 2, and the annular groove 15 is located around the flow port 13; a limit block 16 is provided on the interception net 14, and the limit block 16 is located in the annular groove 15 and can slide along the annular groove 15; this arrangement enables the interception net 14 to rotate around the flow port 13, thereby facilitating the falling off of the granular impurities attached thereto; The interception net 14 is a cone-shaped net or an arc-shaped net. In this embodiment, the interception net 14 is a cone-shaped net. The interception net 14 is provided with a flow-turbulating fin 17. When the medium after heat exchange enters the flow port 13, the force of the liquid flow acts on the flow-turbulating fin 17, thereby driving the interception net 14 to rotate. When the medium after heat exchange enters from the flow port 13, the interception net 14 can block particulate impurities; when the medium flows and the amount of particulate impurities on different surfaces of the interception net 14 differs, the interception net 14 can rotate, so that the particulate impurities attached to its outside automatically fall off, thereby avoiding the deposition of impurities in the inner tube 2 and allowing the medium to maintain a high flow state for a long time.

[0024] Although the present invention has been described in detail by reference to the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily think of changes or substitutions within the technical scope disclosed by the present invention, and these shall be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A geothermal heat storage intelligent monitoring heat exchange device, comprising an outer tube and an inner tube; characterized in that: The outer tube comprises a vertical section and a tapered section, and the tapered section closes from top to bottom; A plug is provided in the conical section; The plug is spherical and includes a shell, a through hole is formed on the shell, and a counterweight is arranged in the through hole; the counterweight is connected to the inner side of the shell through an elastic member A, and the size of the counterweight is smaller than the size of the lower port of the conical section; When the counterweight is placed in the through hole, the blockage is spherical, and the elastic member A is in a compressed state; A groove is provided on the side of the counterweight block, and a stop bar is rotatably installed in the groove; A flow opening and an interception net are arranged on the side surface of the inner tube. The interception net is located around the flow opening and can rotate.

2. The geothermal heat storage intelligent monitoring heat exchange device according to claim 1, characterized in that: The counterweight block is a tungsten alloy block.

3. The geothermal heat storage intelligent monitoring heat exchange device according to claim 1, characterized in that: A magnet A is arranged inside the counterweight block, and an annular magnet B is arranged on the bottom surface of the lower port of the conical section. The magnet A and the magnet B are used in combination.

4. The geothermal heat storage intelligent monitoring heat exchange device according to claim 1, characterized in that: An elastic member B is provided between the blocking bar and the groove. When the counterweight is in the through hole, the elastic member B is in a compressed state.

5. The geothermal heat storage intelligent monitoring heat exchange device according to claim 1, characterized in that: The blocking strip is provided with anti-slip teeth.

6. The geothermal heat storage intelligent monitoring heat exchange device according to claim 1, characterized in that: An arc-shaped protrusion is arranged on the tube wall of the outer tube.

7. The geothermal heat storage intelligent monitoring heat exchange device according to claim 1, characterized in that: An annular groove is arranged on the inner tube, and the annular groove is located around the flow opening; a limit block is arranged on the interception net, and the limit block is located in the annular groove.

8. The geothermal heat storage intelligent monitoring heat exchange device according to claim 1, characterized in that: The intercepting net is one of a conical net and an arc net.

9. The geothermal heat storage intelligent monitoring heat exchange device according to claim 1, characterized in that: The intercepting net is provided with spoiler fins.

10. The geothermal heat storage intelligent monitoring heat exchange device according to claim 1, characterized in that: A silicone pad is arranged on the inner side of the tapered section.

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