Geothermal heat source heating system

Abstract

The utility model discloses a geothermal heat source heating system which comprises a water inlet pipe. The heat exchange cavity comprises a swirler which is in a conical shape, the conical tip of the swirler extends downwards, the inner wall of the swirler is provided with a protruding part which is in a continuous spiral line shape, and the water inlet pipe is communicated with the swirler along the tangent line; the scraping plate moves in the swirler conical tip and is driven to move so as to scrape water scale at the bottom; the input end of the water outlet pipe is communicated with the swirler conical tip. According to the geothermal heat source heating system, due to the design of the swirler, water flow enters along the tangent line to form vortex, the speed of the water flow is high when the water flow reaches the conical tip part, precipitated impurities are washed out, formed incrustation is scraped through rotation of the scraping plate, incrustation is prevented from being formed at the low point of the heat exchange pipeline, the water flow is evenly heated by geothermal energy, and the heating efficiency is improved. The heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of geothermal heating, in particular to a geothermal heat source heating system. Background Art

[0002] Existing geothermal heat source utilization devices usually adopt a buried pipe method, placing the heat exchange network underground, absorbing heat from the underground heat exchanger, and performing secondary heat exchange on the ground. Finally, the exchanged medium water is transported to the user for heat dissipation. The heat-dissipated medium water passes through the heat exchange network again and penetrates deep into the ground to form a cycle.

[0003] In conjunction with publication number CN209857177U, publication date 2019-12-27, a new medium-deep geothermal energy single-phase heating system is disclosed.

[0004] In the prior art including the above patent, there are microbubble lightweight concrete insulation pipes, inner pipes, outer pipes, water collection and return water devices, water distribution and water delivery devices, inspection wells and terminal water users. The output end of the water collection and return water device is connected to the microbubble lightweight concrete insulation pipe, which is buried below the ground and extends to the temperature balance layer. Microbubble concrete special steel pipes are used, which have extremely high thermal insulation performance and very little heat loss. The system only uses an underground primary heat network; the return water is then directly transported to the underground through the water collection and return water device. The entire system of the above technology is in a closed circulation state, and its advantages are that it makes full use of geothermal high temperature, greatly reduces the heat loss link of intermediate heat exchange equipment and components, simplifies the system, reduces failures, improves thermal efficiency, reduces costs, and has a more ideal heating effect. However, the heat exchange pipe network is affected by geothermal heat for a long time, and the internal temperature is high, which will reduce the solubility of water, thereby generating scale, and the common heat exchange pipe network has a concave low point, which easily causes impurities in the water to precipitate and form scale. Utility Model Content

[0005] The purpose of the utility model is to provide a geothermal heat source heating system to solve the above problems.

[0006] In order to achieve the above-mentioned object, the utility model provides the following technical solutions: a geothermal heat source heating system, comprising a water inlet pipe;

[0007] The heat exchange chamber comprises a vortex finder in a cone shape with the cone tip extending downward, the inner wall of the vortex finder is provided with a convex portion in a continuous spiral line, and the water inlet pipe is connected to the vortex finder along a tangent line;

[0008] A scraper moves in the cone tip of the vortex finder and is driven to scrape off the bottom scale;

[0009] The water outlet pipe has an input end connected to the cone tip of the vortex finder.

[0010] Preferably, the heat exchange chamber is equipped with an inspection cover.

[0011] Preferably, a plurality of driven stirring rods are provided on one side of the inspection cover located in the heat exchange chamber.

[0012] Preferably, there is a high position and a low position in the active stroke of the stirring rod, and the stirring rod rotates during the switching process.

[0013] Preferably, the stirring rod is fixedly connected to the scraper.

[0014] Preferably, a continuous N-shaped guide groove is provided on the inspection cover, and a protrusion is provided on the stirring rod to slide in the guide groove.

[0015] In the above technical scheme, a geothermal heat source heating system provided by the utility model has the following beneficial effects: through the design of the vortex finder, the water flow forms a vortex after entering along the tangent line, and the speed is relatively high when the water flows to the tip of the cone, which flushes out the precipitated impurities, and the formed scale is scraped off by the rotation of the scraper, avoiding the formation of scale at the low points of the heat exchange pipe, so that the water flow is evenly heated by the geothermal energy, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 An overall three-dimensional schematic diagram provided for an embodiment of the utility model;

[0018] Figure 2 A schematic diagram of the internal structure of the heat exchange chamber provided in an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the stirring rod and guide groove structure provided in an embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1. Water inlet pipe; 2. Heat exchange chamber; 21. Inspection cover; 22. Stirring rod; 23. Vortex finder; 24. Scraper; 25. Guide groove; 26. Bump; 3. Water outlet pipe. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] likeFigures 1-3 As shown, a geothermal heat source heating system includes a water inlet pipe 1;

[0024] The heat exchange chamber 2 comprises a vortex finder 23 which is conical and has a conical tip extending downward, the inner wall of the vortex finder 23 is provided with a convex portion in the form of a continuous spiral line, and the water inlet pipe 1 is connected to the vortex finder 23 along a tangent line;

[0025] A scraper 24 moves in the cone tip of the vortex finder 23 and is driven to scrape off the bottom scale;

[0026] The water outlet pipe 3 has its input end connected to the cone tip of the vortex finder 23 .

[0027] Specifically, the water inlet pipe 1, the heat exchange chamber 2 and the water outlet pipe 3 are all buried underground, and a filtering device is provided at the output end of the water outlet pipe 3 to remove impurities in the water.

[0028] Furthermore, after the water flow in the water inlet pipe 1 enters the vortex finder 23 along the tangent, it will collide with the inner wall of the vortex finder 23 and flow downward in a spiral along the inner wall of the vortex finder 23 to form a vortex. The impurities in the water flow are thrown to the inner wall of the vortex tube 23 due to the centrifugal force and are precipitated at the cone tip under the action of gravity. As the rotation radius of the water flow gradually decreases and the tangential speed continues to increase, the speed is relatively high when the water flows to the cone tip, which flushes the precipitated impurities and takes them away into the water outlet pipe 3 to prevent the impurities from staying at the cone tip of the vortex finder 23 for a long time to form scale. Then the water outlet pipe 3 merges into the filter device to remove the impurities, and a part of the water flow forms a spiral upward reflux in the middle of the vortex finder 23, thereby forming a cycle. This part of the water flow, combined with the design of the scraper 24, drives the scraper 24 to rotate, thereby scraping off the scale formed on the bottom.

[0029] In the above technology, the design of the vortex finder 23 allows the water flow to form a vortex after entering along the tangent line. When the water flows to the tip of the cone, the speed is relatively high, which washes away the precipitated impurities, and the formed scale is scraped off by the rotation of the scraper 24, avoiding the formation of scale at the low points of the heat exchange pipe, so that the water flow is evenly heated by the geothermal energy, thereby improving the heat exchange efficiency.

[0030] As an embodiment further provided by the present invention, a driven stirring rod 22 is provided on one side of the inspection cover 21 located in the heat exchange chamber 2 .

[0031] Specifically, the stirring rod 22 can be driven to rotate by a motor, thereby further accelerating the water flow in the vortex device 23, making the flushing force of the water flow stronger and reducing the precipitation of impurities; or it can be driven by a telescopic cylinder to move up and down in the vertical direction, so that the precipitated impurities float and merge into the water flow to be taken away; or other driving mechanisms and methods known to those skilled in the art can be used;

[0032] Furthermore, since the inspection cover 21 is assembled on the heat exchange chamber 2 , the stirring rod 22 can be repaired or cleaned by removing the inspection cover 21 .

[0033] As another embodiment further provided by the present invention, the stirring rod 22 is fixedly connected to the scraper 24 .

[0034] Specifically, the scraper 24 is at the cone tip of the vortex finder 23, so the tangential speed of the water flow is the largest and drives the scraper 24 to rotate, thereby driving the stirring rod 22 to rotate. Due to the uneven pressure distribution along the radial direction during the vortex movement, an upward rotational motion is generated in the top center of the vortex finder 23, and the stirring rod 22 is located at the axis of the vortex finder 23. It is pushed from a low position to a high position by the inward rotation and the gravity of the stirring rod 22 itself offsets part of the lift caused by the vortex, thereby preventing the vortex from causing excessive upward thrust on the inspection cover 21 and ensuring that the inspection cover 21 is not deformed by the thrust.

[0035] As another embodiment further provided by the present invention, a guide groove 25 which is continuous in an N shape is provided on the inspection cover 21 , and a protrusion 26 is provided on the stirring rod 22 to slide in cooperation with the guide groove 25 .

[0036] Specifically, when the stirring rod 22 is pushed to a high position by the upward movement of the vortex, the stirring rod 22 continues to rotate and causes the protrusion 26 to continue to rotate, thereby causing the protrusion 26 to slide along the guide groove 25. Since the guide groove 25 is in a continuous N shape, including a vertical groove and a downwardly extending inclined groove, the protrusion 26 moves downward along the inclined groove, driving the stirring rod 22 to return to a low position, and then rises again under the action of the vortex inward rotation, forming a reciprocating up and down movement, thereby driving the scraper 24 to rotate and move reciprocatingly up and down, so that the precipitated scale floats in the water flow after the scale is scraped off, and then is taken away by the outlet pipe 3.

[0037] Working principle: After the water flow in the water inlet pipe 1 enters the vortex finder 23 along the tangent line, it will collide with the inner wall of the vortex finder 23 and flow downward along the inner wall of the vortex finder 23 in a spiral to form a vortex. The impurities in the water flow are thrown to the inner wall of the vortex tube 23 due to the centrifugal force and are deposited at the tip of the cone under the action of gravity. As the rotation radius of the water flow gradually decreases, the tangential speed continues to increase. When the water flows to the tip of the cone, the speed is relatively large, and the scraper 24 is driven to rotate, thereby driving the stirring rod 22 to rotate. Due to the uneven pressure distribution in the radial direction during the vortex movement, the top center of the vortex finder 23 produces an upward rotational motion, and the stirring rod 22 is located at the axis of the vortex finder 23. It is pushed from a low position to a high position by the inward rotation upward motion, and is pushed by the stirring rod 22 itself. The gravity offsets part of the lift brought by the eddy current, avoiding the eddy current from causing excessive upward thrust on the inspection cover 21, flushing the precipitated impurities, and the stirring rod 22 continues to rotate and causes the protrusion 26 to continue to rotate, so that the protrusion 26 slides along the guide groove 25. Since the guide groove 25 is a continuous N-shape, including a vertical groove and a downward extending inclined groove, the protrusion 26 moves downward along the inclined groove, driving the stirring rod 22 to return to a low position, and then rises under the action of the eddy current internal rotation, forming a reciprocating up and down movement, thereby driving the scraper 24 to rotate and move back and forth up and down at the same time, scraping off the scale and making the precipitated scale float in the water flow. When it reaches the cone tip, it is subjected to a greater speed to enter the water outlet pipe 3, and then the water outlet pipe 3 is merged into the filter device to remove impurities.

[0038] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A geothermal heat source heating system, characterized in that: include: Water inlet pipe (1); The heat exchange chamber (2) comprises a vortex finder (23) which is conical and has a conical tip extending downward, the inner wall of the vortex finder (23) is provided with a convex portion in the form of a continuous spiral line, and the water inlet pipe (1) is connected to the vortex finder (23) along a tangent line; A scraper (24) moves inside the cone tip of the vortex finder (23) and is driven to scrape off the bottom scale; The water outlet pipe (3) has an input end which is connected to the cone tip of the vortex flow device (23).

2. A geothermal heat source heating system according to claim 1, characterized in that: The heat exchange chamber (2) is equipped with an inspection cover (21).

3. A geothermal heat source heating system according to claim 2, characterized in that: A plurality of driven stirring rods (22) are arranged on one side of the inspection cover (21) located in the heat exchange chamber (2).

4. A geothermal heat source heating system according to claim 3, characterized in that: The stirring rod (22) has a high position and a low position in its movable stroke, and the stirring rod (22) rotates during the switching process.

5. A geothermal heat source heating system according to claim 3, characterized in that: The stirring rod (22) is fixedly connected to the scraper (24).

6. A geothermal heat source heating system according to claim 5, characterized in that: The inspection cover (21) is provided with a continuous N-shaped guide groove (25), and the stirring rod (22) is provided with a protrusion (26) to slide with the guide groove (25).

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