阅读说明：本技术 一种拓扑优化结构地埋管换热器 (Buried pipe heat exchanger with topology optimization structure ) 是由 张玉瑾 张连连 王雪锦 李娟娟 孙勇 马宏雷 李联友 王玉坤 田亚男 任佳艺 于 2020-12-07 设计创作，主要内容包括：本发明属于地埋管换热器技术领域,尤其是一种拓扑优化结构地埋管换热器,针对地埋管换热器在施工埋管时,需要钻孔施工,而且多个地埋式换热器单体之间相连通时不够便捷,施工成本较高和目前的地埋管的换热低的技术问题,现提出以下方案,包括至少两个地埋循环器以及用于连接两个地埋循环器的连通件。本发明提出的一种拓扑优化结构地埋管换热器在施工埋管时,无需额外钻孔施工,而且还能保证其与土层的接触效果,可降低施工成本,可进一步提高其内部的换热介质与土层之间的热传导面积,从而具有更高的换热速率,而且能够使多个地埋式换热器单体之间的连通工作更加快捷。(The invention belongs to the technical field of buried pipe heat exchangers, in particular to a buried pipe heat exchanger with a topology optimization structure, which aims at the technical problems that the buried pipe heat exchanger needs drilling construction when a buried pipe is constructed, a plurality of buried pipe heat exchanger monomers are not convenient and fast to communicate, the construction cost is higher and the heat exchange of the existing buried pipe is low. When the buried pipe heat exchanger with the topological optimization structure is used for construction of buried pipes, extra drilling construction is not needed, the contact effect of the buried pipe heat exchanger and a soil layer can be guaranteed, the construction cost can be reduced, the heat conduction area between a heat exchange medium in the buried pipe heat exchanger and the soil layer can be further increased, the heat exchange rate is higher, and the communication work among a plurality of buried heat exchanger units can be faster.)

1. A topologically optimised structural ground borehole heat exchanger comprising: the buried circulator comprises a metal outer pipe (1), the bottom of the metal outer pipe (1) is fixedly communicated with a conical end (2), the outer surface of the metal outer pipe (1) is fixedly connected with heat conduction fins (3) which are distributed in a radial mode, a red copper pipe (4) is fixedly sleeved on the inner wall of the metal outer pipe (1), an inner cylinder (6) is sleeved inside the red copper pipe (4), a group of S-shaped heat conduction fins (5) which are distributed in a radial mode relative to the circle center of the red copper pipe (4) are fixedly connected to the inner wall of the red copper pipe (4), one end, close to the circle center of the red copper pipe (4), of each S-shaped heat conduction fin (5) is fixedly connected with the outer surface of the inner cylinder (6), a backflow cavity (k) is formed between each two adjacent S-shaped heat conduction fins (5) and the inner side wall of the red copper pipe (4) and the outer surface of the inner cylinder (6), the top end of the metal outer pipe (1) is fixedly communicated with a backflow cover (7), a material drawing cavity (r) is arranged inside the backflow cover (7), the material drawing cavity (r) is communicated with a backflow cavity (k), the top end of the inner cylinder (6) is fixedly communicated with a collecting pipe (8), one end, far away from the inner cylinder (6), of the collecting pipe (8 extends to the inside of the material drawing cavity (r) and penetrates through the side wall of the backflow cover (7) to extend to the outside of the backflow cover (7), the outer surface of the collecting pipe (8) is hermetically connected with the side wall of the backflow cover (7), a backflow pipe (9) is arranged outside the backflow cover (7), and the backflow pipe (9) is fixedly embedded in the side wall of the backflow cover (7) and communicated with the material drawing cavity (r);

the inner diameter value of the collecting pipe (8) is the same as the inner diameter value of the return pipe (9), the outer diameter value of the collecting pipe (8) is the same as the outer diameter value of the return pipe (9), the communicating piece (10) is matched with the collecting pipe (8) and the return pipe (9), and when the underground circulators are communicated in a combined mode, the collecting pipe (8) is communicated with the return pipe (9) through the communicating piece (10).

2. The buried pipe heat exchanger with the topology optimization structure according to claim 1, wherein the communicating member (10) comprises a connecting block (101), a connecting cylinder (102) is fixedly embedded in the connecting block (101), two ends of the connecting cylinder (102) respectively extend to the left side and the right side of the connecting block (101), a set of clamping strips (103) are fixedly connected to the left side and the right side of the connecting block (101), each set of clamping strips (103) are radially distributed about the center of the connecting cylinder (102), included angles between every two adjacent clamping strips (103) and the center of the connecting cylinder (102) are equal, and a set of metal barbs (104) are fixedly connected to one side of each clamping strip (103) close to the connecting cylinder (102).

3. A topologically optimised structured borehole heat exchanger according to claim 2, wherein the outer surface of each end of the adapter tube (102) is provided with a set of collars (105), and the number of collars (105) in each set is at least two.

4. A topologically optimised structured ground pipe heat exchanger according to claim 2, characterised in that the outer surface of the joining block (101) is provided with anti-slip threads, two auxiliary rods (106) are fixedly connected to the outer surface of the joining block (101), and the two auxiliary rods (106) are symmetrical with respect to the joining block (101).

5. A topologically optimised structural ground pipe heat exchanger according to claim 1, characterised in that the inner barrel (6) comprises a support tube (61), a rubber-plastic foam tube (62) and an inner flow tube (63), the inner flow tube (63) is sleeved inside the support tube (61), and the inner flow tube (63) is fixedly sleeved between the support tube (61) and the rubber-plastic foam tube (62).

6. A topologically optimised structured borehole heat exchanger according to claim 5, wherein the support tube (61) is of nylon and the rubber-plastics foam tube (62) is of random co-polypropylene.

7. A topologically optimised structured ground heat exchanger according to claim 1, characterised in that a non-return valve (11) is provided within the conical end (2), the input of the non-return valve (11) being in fixed communication with the inner barrel (6), and the output of the non-return valve (11) being in communication with the inner cavity of the conical end (2).

8. A topologically optimised structured borehole heat exchanger according to claim 1, wherein the tapered end (2), the heat transfer fins (3) and the return shroud (7) are all of metal, and the outer surface of the metal outer tube (1), the outer surface of the tapered end (2) and the outer surface of the heat transfer fins (3) are provided with anti-rust coatings.

Technical Field

The invention relates to the technical field of ground heat exchangers, in particular to a ground heat exchanger with a topology optimization structure.

Background

The buried pipe heat exchanger is a device which utilizes the characteristic that underground soil has relatively stable temperature and carries out heat exchange between a pipeline system deeply buried in the soil around a building and the soil. Circulating fluid is respectively communicated with a pipeline system in the soil and a pipeline system in the building, in winter, the soil is used as a heat source, the circulating fluid absorbs heat in the soil and is supplied to the building for heating through a heat pump unit; in summer, soil is used as a cold source, and the circulating fluid absorbs heat in a building and is discharged to the soil through the heat pump unit. Compared with the traditional coal-fired and gas-fired heating mode and air-conditioning refrigeration mode, the buried pipe heat exchanger can achieve the same heating or refrigeration effect only by consuming a small amount of electric energy, has low operating cost, does not generate any harmful substance, and is energy-saving and environment-friendly.

Currently, in the existing research of ground source heat pump heat exchangers, the ground buried pipe mainly adopts five forms: single U-shaped, W-shaped, parallel double U-shaped, parallel triple U-shaped and spiral. Referring to the 'buried pipe connecting piece, buried pipe heat exchanger and heat exchange system' disclosed in chinese patent application publication specification CN104807253A and the 'buried pipe connecting piece, buried pipe heat exchanger and heat exchange system' disclosed in chinese patent application publication specification CN 104819601B, it can be known that the two buried pipe heat exchangers are formed by burying two pipes in the ground and forming a loop by using U-shaped ends connecting the bottoms of the two buried pipes to realize the circulation function of the heat transfer medium, and the two pipes are required to realize the circulation capability of the heat transfer medium, so when the buried pipes are constructed, drilling construction is required, the construction cost is high, and the operation is not convenient when a plurality of buried heat exchanger units are communicated.

Referring to 'a pile foundation buried pipe ground source heat pump double pipe heat exchanger' disclosed in Chinese patent application publication No. CN110455099A, the outer pipe of the heat exchanger is made of a seamless steel pipe with a large heat conductivity coefficient and subjected to corrosion and rust prevention treatment, so that heat exchange between the heat exchanger and a pile foundation is enhanced, the outer layer inner pipe and the inner layer inner pipe are made of PVC pipes with a small heat conductivity coefficient, and heat insulation materials are filled between the outer layer inner pipe and the inner layer inner pipe, so that the thermal short circuit between inner and outer layer circulating fluids is weakened, and the heat exchange performance of the heat exchanger is further improved; the lower part of the outer pipe of the heat exchanger is in threaded connection with the base, the ultrahigh pressure at the bottom of the heat exchanger can be effectively borne, and the heat exchanger is arranged in a building pile foundation, so that the drilling time and cost required by a common ground source heat pump are saved. But its simple structure, relative buried heat exchanger of equal unit volume, the heat conduction area between its inside heat transfer medium and the soil layer is less, and heat transfer rate is low.

Disclosure of Invention

The invention provides a buried pipe heat exchanger with a topology optimization structure based on the technical problems that the buried pipe heat exchanger needs drilling construction when a buried pipe is constructed, a plurality of buried heat exchanger monomers are not convenient and fast to communicate, the construction cost is high, and the heat exchange of the existing buried pipe is low. Its advantage lies in when the construction pipe laying, need not extra drilling construction, but also can guarantee its and soil layer contact effect, can reduce construction cost, can further improve the heat conduction area between its inside heat transfer medium and the soil layer to have higher heat transfer rate, can make the intercommunication work between a plurality of buried heat exchanger monomers more swift moreover.

The invention provides a buried pipe heat exchanger with a topology optimization structure, which comprises: at least two underground circulators and a communicating piece for connecting the two underground circulators;

bury circulator and include the metal outer tube, the fixed intercommunication in bottom of metal outer tube has the toper end, the outer fixed surface of metal outer tube is connected with the heat conduction wing that is radial distribution, the fixed cover of inner wall of metal outer tube has the red copper pipe, the inside cover of red copper pipe is equipped with the inner tube, the inner wall fixedly connected with of red copper pipe is a set of S type conducting strip that is radial distribution about the centre of a circle of red copper pipe, every one end that S type conducting strip is close to the centre of a circle of red copper pipe all is connected with the surface fixity of inner tube, forms backward flow chamber between the inside wall of every two adjacent S type conducting strips and red copper pipe and the surface of inner tube, the fixed intercommunication in top of metal outer tube has the backward flow cover, the inside of backward flow cover is equipped with draws the material chamber, it is linked together with the backward flow chamber to draw the material chamber, the top fixed intercommunication of inner tube has the pressure manifold, the one end that the inner tube was kept away from to the The outer surface of the collecting pipe is hermetically connected with the side wall of the backflow cover, a backflow pipe is arranged outside the backflow cover, and the backflow pipe is fixedly embedded in the side wall of the backflow cover and communicated with the material drawing cavity, and is close to the backflow cover;

the inner diameter value of the collecting pipe is the same as that of the backflow pipe, the outer diameter value of the collecting pipe is the same as that of the backflow pipe, the communicating piece is matched with the collecting pipe and the backflow pipe, and when the two underground circulators are combined and communicated, the collecting pipe and the backflow pipe are communicated through the communicating piece.

Preferably, the intercommunication piece is including linking up the piece, the inside fixed mosaic that links up the piece has a linking section of thick bamboo, the both ends that link up a section of thick bamboo extend to the left and right sides that links up the piece respectively, the equal fixedly connected with of the equal fixedly connected with in the left and right sides face of linking up the piece a set of card strip, every group the card strip all is radial distribution about the centre of a circle that links up a section of thick bamboo, and per two adjacent card strips and the contained angle value of the centre of a circle that links up a section of thick bamboo all equal, every a set of metal barb of a side that the card strip is close to a linking section of thick bamboo.

Preferably, the outer surfaces of the two ends of the connecting cylinder are provided with a group of convex rings, and the number of each group of convex rings is at least two.

Preferably, the outer surface of the joining block is provided with anti-slip threads, the outer surface of the joining block is fixedly connected with two auxiliary rods, and the two auxiliary rods are symmetrical with respect to the joining block.

Preferably, the inner cylinder comprises a supporting tube, a rubber and plastic foam tube and an inner flow tube, the inner flow tube is sleeved inside the supporting tube, and the inner flow tube is fixedly sleeved between the supporting tube and the rubber and plastic foam tube.

Preferably, the support tube is made of nylon, and the rubber-plastic foam tube is made of random copolymer polypropylene.

Preferably, a one-way valve is arranged inside the conical end head, the input end of the one-way valve is fixedly communicated with the inner cylinder, and the output end of the one-way valve is communicated with the inner cavity of the conical end head.

Preferably, the tapered end, the heat conduction fins and the backflow hood are all made of metal, and the outer surface of the metal outer pipe, the outer surface of the tapered end and the outer surface of the heat conduction fins are all provided with antirust coatings.

The beneficial effects of the invention are as follows:

1. this topological optimization structure ground heat exchanger buries the outside bearing structure of circulator jointly through toper end, heat conduction wing and backward flow cover, should bury the circulator inside and outside two-layer circulation route, can realize heat-conducting medium's circulation ability alone, pile driving device such as usable vibratory hammer directly will bury the circulator and squeeze into comparatively soft soil layer with this, when the pipe is buried in the construction, need not extra drilling construction, but also can guarantee its and soil layer contact effect to reduce construction cost.

2. The buried pipe heat exchanger with the topology optimization structure comprises a metal outer pipe, a conical end, heat conduction fins, a red copper pipe inside the metal outer pipe, S-shaped heat conduction fins and a circulating device, wherein the metal outer pipe is combined with a backflow cover, a collecting pipe and a backflow pipe to jointly form the buried circulating device, a circulating passage is formed between the inner layer and the outer layer of the buried circulating device, the circulating capacity of a heat conduction medium can be independently realized, the heat conduction fins which are radially distributed are fixedly connected to the outer surface of the metal outer pipe, the heat conduction contact area between the buried circulating device and a soil layer is enlarged, the red copper pipe and the S-shaped heat conduction fins which are arranged between the metal outer pipe and the inner pipe are used, the heat conduction area between the heat exchange medium inside the buried pipe and the soil layer can be further improved, and the heat exchange rate.

3. This topological optimization structure ground heat exchanger buries the piece through setting up, when the combination intercommunication between the circulator monomer is buried to a plurality of ground, buries the usable piece of intercommunication of the free back flow of circulator and another ground and buries the free pressure manifold of circulator and realize high-speed joint, can make the intercommunication work between a plurality of ground heat exchanger monomers of burying more swift.

The parts of the device not involved are the same as or can be implemented using prior art.

Drawings

FIG. 1 is a schematic perspective view of an underground circulator according to the present invention;

FIG. 2 is a schematic view of the metal outer tube and its internal structure according to the present invention;

FIG. 3 is a schematic cross-sectional view of the metal outer tube of the present invention;

FIG. 4 is a cross-sectional structural schematic view of a front view of the underground circulator of the present invention;

FIG. 5 is a perspective view of the communicating member of the present invention;

FIG. 6 is a cross-sectional structural schematic view of a front view of a communication member of the present invention.

In the figure: 1. a metal outer tube; 2. a tapered end; 3. heat conducting fins; 4. a copper pipe; 5. an S-shaped heat conducting fin; 6. an inner barrel; 61. supporting a tube; 62. a rubber plastic foam tube; 63. an inner flow tube; 7. a reflow hood; 8. a header pipe; 9. a return pipe; 10. a communicating member; 101. a joining block; 102. a joining cylinder; 103. clamping the strip; 104. a metal barb; 105. a convex ring; 106. an auxiliary lever; 11. a one-way valve; k. a reflux cavity; r, drawing the material cavity.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to figures 1 to 6, a topologically optimised structural borehole heat exchanger comprises: at least two underground circulators and a communication member 10 for connecting the two underground circulators;

the underground circulator comprises a metal outer pipe 1, the bottom of the metal outer pipe 1 is fixedly communicated with a conical end 2, the outer surface of the metal outer pipe 1 is fixedly connected with heat conduction fins 3 which are distributed in a radial shape, a red copper pipe 4 is fixedly sleeved on the inner wall of the metal outer pipe 1, an inner cylinder 6 is sleeved inside the red copper pipe 4, the inner cylinder 6 comprises a supporting pipe 61, a rubber and plastic foam pipe 62 and an inner flow pipe 63, the inner flow pipe 63 is sleeved inside the supporting pipe 61, the inner flow pipe 63 is fixedly sleeved between the supporting pipe 61 and the rubber and plastic foam pipe 62, the supporting pipe 61 is made of nylon, the rubber and plastic foam pipe 62 is made of random copolymer polypropylene, the structural strength of the inner cylinder 6 can be ensured, the heat conduction coefficient of the inner cylinder 6 can be small, the heat conduction rate of a heat conduction medium in the inner cylinder 6 and the outer part of the inner cylinder 6 can be reduced, the inner wall of the red copper pipe 4 is, one end of each S-shaped heat conducting fin 5, which is close to the circle center of the red copper pipe 4, is fixedly connected with the outer surface of the inner cylinder 6, a backflow cavity k is formed between the inner side wall of each two adjacent S-shaped heat conducting fins 5 and the red copper pipe 4 and between the inner side wall of each two adjacent S-shaped heat conducting fins and the outer surface of the inner cylinder 6, when a heat conducting medium flows through the backflow cavity k, the heat conducting area between the heat conducting medium and the red copper pipe 4, between the metal outer pipe 1 and the heat conducting fins 3 and between the heat conducting medium and the soil layer can be improved, the top end of the metal outer pipe 1 is fixedly communicated with a backflow cover 7, a material drawing cavity r is arranged inside the backflow cover 7, the material drawing cavity r is communicated with the backflow cavity k, the top end of the inner cylinder 6 is fixedly communicated with a collecting pipe 8, one end, which is far away from the inner cylinder 6, extends into the inside of the material drawing cavity r and, a return pipe 9 is arranged outside the return hood 7, and the return pipe 9 close to the return hood 7 is fixedly embedded in the side wall of the return hood 7 and communicated with the material drawing cavity r;

the inner diameter value of the collecting pipe 8 is the same as the inner diameter value of the return pipe 9, the outer diameter value of the collecting pipe 8 is the same as the outer diameter value of the return pipe 9, the communicating piece 10 is matched with the collecting pipe 8 and the return pipe 9, the communicating piece 10 comprises a connecting block 101, a connecting cylinder 102 is fixedly embedded in the connecting block 101, a group of convex rings 105 are arranged on the outer surfaces of two ends of the connecting cylinder 102, the number of each group of convex rings 105 is at least two, two ends of the connecting cylinder 102 respectively extend to the left side and the right side of the connecting block 101, a group of clamping strips 103 are fixedly connected to the left side and the right side of the connecting block 101, each group of clamping strips 103 are radially distributed about the circle center of the connecting cylinder 102, the included angles of every two adjacent clamping strips 103 and the circle center of the connecting cylinder 102 are equal, a group of metal barbs 104 are fixedly connected to one side of each clamping strip 103 close to the connecting cylinder 102, and anti-slip veins are formed, the outer surface of the connection block 101 is fixedly connected with two auxiliary rods 106, the two auxiliary rods 106 are symmetrical relative to the connection block 101, when the two underground circulators are combined and communicated, the collecting pipe 8 and the return pipe 9 are communicated through the communication piece 10, during operation, the two ends of the connection cylinder 102 are respectively sleeved in the collecting pipe 8 and the return pipe 9, then the collecting pipe 8 and the return pipe 9 are held to exert opposite force until the two ends of the connection cylinder 102 are respectively and completely sleeved in the collecting pipe 8 and the return pipe 9, the two groups of clamping strips 103 are respectively positioned on the outer surfaces of the collecting pipe 8 and the return pipe 9, and the metal barbs 104 are utilized to limit the collecting pipe 8 and the return pipe 9, so that the single bodies of the plurality of underground circulators can be quickly connected.

Furthermore, a one-way valve 11 is arranged inside the conical end head 2, the input end of the one-way valve 11 is fixedly communicated with the inner cylinder 6, and the output end of the one-way valve 11 is communicated with the inner cavity of the conical end head 2. The scheme is used for avoiding backflow of the heat-conducting medium.

Furthermore, the conical end 2, the heat conducting fins 3 and the backflow cover 7 are made of metal materials, and the outer surface of the metal outer pipe 1, the outer surface of the conical end 2 and the outer surface of the heat conducting fins 3 are provided with antirust coatings, and the antirust coatings can be made of antirust paint, so that the antirust purposes of the metal outer pipe 1, the conical end 2 and the heat conducting fins 3 are achieved, and the service life of the heat exchanger is prolonged.

In the invention, through the structural design of the metal outer pipe 1, the conical end head 2, the heat conduction fins 3, the red copper pipe 4, the S-shaped heat conduction fins 5 and the inner cylinder 6 in the metal outer pipe 1 and combining the backflow cover 7, the collecting pipe 8 and the backflow pipe 9, the buried circulator is formed, when the buried circulator is constructed, firstly, the hard soil layer on the upper layer of the soil is planed, then, a pile driving device such as a vibration hammer is used for being arranged at the top end of the backflow cover 7, the buried circulator is driven into the softer soil layer, no extra drilling construction is needed, the contact effect of the buried circulator and the soil layer can be ensured, thereby reducing the construction cost, after a plurality of buried circulators are driven into the ground, the backflow pipe 9 of one buried circulator monomer is communicated with the collecting pipe 8 of the other buried circulator monomer through a communicating piece 10, the plurality of buried circulator monomers are connected in series, then, the collecting pipe 8 of the most head buried circulator monomer is communicated with the output end of a heat pump, the return pipe 9 of the single underground circulator at the tail end is communicated with the input end of a heat exchanger in a building, meanwhile, the input end of a heat pump is communicated with the output end of the heat exchanger in the building, the heat pump is started, so that a heat-conducting medium can circulate in the underground circulator, and in the circulation process of the heat-conducting medium, the heat-conducting medium sequentially flows through an inner cylinder 6, a one-way valve 11, a conical end 2, a return cavity k, a material picking cavity r and flows out through the return pipe 9 by using the pressure provided by the heat pump through a collecting pipe 8, and when the heat-conducting medium flows through the return cavity k, the heat-conducting area between the heat-exchanging medium in the inner part and a soil layer can be further increased through the metal outer pipe 1, the heat-conducting fins 3 and the red copper pipe 4 and the S-shaped heat-conducting fins 5 arranged in the metal outer pipe 1, so.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.