CN116242044A - Buried pipe, heat exchange system and use method of buried pipe - Google Patents

Abstract

The invention relates to the technical field of renewable energy sources, in particular to a buried pipe, a heat exchange system and a use method of the buried pipe. A buried pipe comprising: the water inlet pipe is provided with a water inlet; the water outlet pipe is arranged at intervals with the water inlet pipe and is provided with a water outlet; the horizontal pipe structure comprises a shallow horizontal pipe and a deep horizontal pipe, wherein the shallow horizontal pipe and the deep horizontal pipe are respectively communicated with a water inlet pipe and a water outlet pipe; the first opening and closing structure is arranged in the water inlet pipe, and the height of the first opening and closing structure is lower than that of the shallow horizontal pipe; the second opening and closing structure is arranged in the shallow horizontal pipe. The invention solves the problems that the geothermal heat exchange system needs a plurality of equipment to cooperate, and has large investment and complex structure, thereby providing a buried pipe, a heat exchange system and a use method of the buried pipe.

Description

Buried pipe, heat exchange system and use method of buried pipe

Technical Field

The invention relates to the technical field of renewable energy sources, in particular to a buried pipe, a heat exchange system and a use method of the buried pipe.

Background

The buried pipe ground source heat pump is a cooling and heating system which uses a relatively constant underground temperature field as a cold source or a heat source, wherein the buried pipe is a device which uses circulating water as a heat exchange medium to extract underground heat or cold to the ground surface and exchange heat with an evaporator or a condenser of the heat pump.

In the existing geothermal heat exchange system, technicians combine a middle-deep geothermal buried pipe unit, a shallow geothermal buried pipe unit and a cooling tower unit, and balance between heat supply and cold supply requirements is realized by means of model calculation, but a plurality of devices are needed to cooperate in the system, so that the problems of large investment and complex structure exist.

Disclosure of Invention

Therefore, the invention aims to overcome the defects of the geothermal heat exchange system in the prior art that a plurality of devices are needed to be matched, the investment is large and the structure is complex, and thereby provides a buried pipe, a heat exchange system and a use method of the buried pipe.

In order to solve the above problems, the present invention provides a buried pipe comprising:

the water inlet pipe is provided with a water inlet;

the water outlet pipe is arranged at intervals with the water inlet pipe and is provided with a water outlet;

the horizontal pipe structure comprises a shallow horizontal pipe and a deep horizontal pipe, wherein the shallow horizontal pipe and the deep horizontal pipe are respectively communicated with a water inlet pipe and a water outlet pipe;

the first opening and closing structure is arranged in the water inlet pipe, and the height of the first opening and closing structure is lower than that of the shallow horizontal pipe;

the second opening and closing structure is arranged in the shallow horizontal pipe.

Optionally, the first opening and closing structure includes first necking down ware, floating ball and first crooked combination board, first necking down ware is fixed to be located on the inner wall of inlet tube, the below of first necking down ware is located to first crooked combination board, floating ball locates between first crooked combination board and the first necking down ware.

Optionally, the second opening and closing structure includes second necking down ware, the crooked composition board of second, connecting rod and connecting ball, the second necking down ware is fixed to be located on the inner wall of shallow level pipe, the both ends of connecting rod are fixedly connected with crooked composition board of second and connecting ball respectively.

Optionally, the second opening and closing structure further includes a third bending composition board, and the second bending composition board and the third bending composition board are respectively disposed on the left side and the right side of the second necking device.

Optionally, the cross-sectional areas of the first necking device and the second necking device from the water flow direction increase and then decrease.

Optionally, the first bending composition board, the second bending composition board and the third bending composition board are each composed of a first metal deformation sheet and a second metal deformation sheet, and the thermal expansion coefficients of the first metal deformation sheet and the second metal deformation sheet are different.

Optionally, the water inlet pipe comprises a shallow water inlet pipe and a deep water inlet pipe, and the first opening and closing structure is arranged in the deep water inlet pipe; the water outlet pipe comprises a shallow water outlet pipe and a deep water outlet pipe, and an anti-backflow rod is arranged in the deep water outlet pipe.

Optionally, the water inlet pipe and the water outlet pipe are arranged in parallel.

A heat exchange system comprises the buried pipe.

The use method of the buried pipe comprises the following steps:

when the water cooling device is in a cooling state, the first opening and closing structure is in a closing state, and the second opening and closing structure is in an opening state, so that water flows through the shallow horizontal pipe for heat exchange, enters the water outlet pipe, and flows out from the water outlet;

when the water heater is in a heating state, the first opening and closing structure is in an opening state, and the second opening and closing structure is in a closing state, so that water flows through the deep horizontal pipe for heat exchange, enters the water outlet pipe, and flows out from the water outlet.

The technical scheme of the invention has the following advantages:

1. the invention provides a buried pipe, comprising: the water inlet pipe is provided with a water inlet; the water outlet pipe is arranged at intervals with the water inlet pipe and is provided with a water outlet; the horizontal pipe structure comprises a shallow horizontal pipe and a deep horizontal pipe, and the shallow horizontal pipe and the deep horizontal pipe are respectively communicated with the water inlet pipe and the water outlet pipe; the first opening and closing structure is arranged in the water inlet pipe, and the height of the first opening and closing structure is lower than that of the shallow horizontal pipe; the second opening and closing structure is arranged in the shallow horizontal pipe. Through the setting of first structure and second structure of opening and close, can realize cold extraction and the switching of heat extraction, need not to install other switching control equipment at buried pipe outside again, have simple structure's advantage.

2. The invention provides a buried pipe, a first opening and closing structure comprises a first necking device, a floating ball and a first bending combined plate, wherein the first necking device is fixedly arranged on the inner wall of a water inlet pipe, the first bending combined plate is arranged below the first necking device, the floating ball is arranged between the first bending combined plate and the first necking device, and the opening and closing states of the first opening and closing structure are controlled through the position change of the floating ball. When the temperature of the fluid in the water inlet pipe is higher than a certain threshold value, the first bending combined plate is heated to generate bending phenomenon, the top-driven floating ball floats upwards to block a flow passage in the first necking device, and the first opening and closing structure is automatically closed; when the temperature of the fluid in the water inlet pipe is lower than a certain threshold value, the first opening and closing structure is automatically opened, the first bending combined plate is kept horizontal, the floating ball can not block the flow passage of the first necking device, and water flow smoothly passes through the first opening and closing structure.

3. The invention provides a buried pipe, a second opening and closing structure comprises a second necking device, a second bending combined plate, a connecting rod and a connecting ball, wherein the second necking device is fixedly arranged on the inner wall of a shallow horizontal pipe, and the two ends of the connecting rod are respectively fixedly connected with the second bending combined plate and the connecting ball so as to drive the position change of the connecting ball through the deformation of the second bending combined plate and control the opening and closing of the second opening and closing structure. When the temperature of the fluid in the water inlet pipe is lower than a certain threshold value, the second opening and closing structure is required to be closed, the second bending combined plate is not bent, and the connecting ball is driven to block the flow passage of the second necking device; when the temperature of the fluid in the water inlet pipe is higher than a certain threshold value, the second opening and closing structure is required to be opened, the second bending combined plate automatically bends, the top moving connecting ball moves, the connecting ball cannot block the flow passage of the second necking device, and water flow smoothly passes through the second opening and closing structure.

4. The second opening and closing structure of the buried pipe further comprises a third bending combined plate, the second bending combined plate and the third bending combined plate are respectively arranged on the left side and the right side of the second necking device, and the positions of the connecting balls are limited through the combination arrangement of the second bending combined plate and the third bending combined plate. When the second opening and closing structure is required to be closed, the second bending combined plate is not bent, and the third bending combined plate is bent, and the movable connecting ball is pushed to block the flow passage of the second necking device. When the second opening and closing structure is required to be opened, the second bending combined plate is bent, the connecting ball is pushed to move, the third bending combined plate is not bent, the connecting ball cannot block the flow passage of the second necking device, and water flow smoothly passes through the second opening and closing structure.

5. According to the buried pipe, the cross-sectional areas of the first necking device and the second necking device in the water flow direction are increased and then reduced, and the floating ball and the connecting ball can block the flow channel of the necking device at the position with the minimum cross-sectional area through the change of the cross-sectional areas.

6. The first bending combined plate, the second bending combined plate and the third bending combined plate are composed of the first metal deformation sheet and the second metal deformation sheet, the thermal expansion coefficients of the first metal deformation sheet and the second metal deformation sheet are different, and the bending direction of the bending combined plate meets the working conditions described in the 2 nd, the 3 rd and the 4 th points through determining the positions of the first metal deformation sheet and the second metal deformation sheet.

7. The water inlet pipe comprises a shallow water inlet pipe and a deep water inlet pipe, and a first opening and closing structure is arranged in the deep water inlet pipe; the water outlet pipe comprises a shallow water outlet pipe and a deep water outlet pipe, and a backflow prevention rod is arranged in the deep water outlet pipe so as to prevent backflow of water.

8. According to the buried pipe, the water inlet pipe and the water outlet pipe are arranged in parallel, so that water flow is facilitated.

9. The heat exchange system provided by the invention has the advantages of any one of the above because the ground buried pipe is adopted.

10. According to the use method of the buried pipe, when the buried pipe is in a cold supply state, the first opening and closing structure is in an opening state, and the second opening and closing structure is in a closing state, so that water flows through the shallow horizontal pipe for heat exchange, enters the water outlet pipe, and flows out from the water outlet; when the water heater is in a heating state, the first opening and closing structure is in a closing state, and the second opening and closing structure is in an opening state, so that water flows through the deep horizontal pipe for heat exchange, enters the water outlet pipe, and flows out from the water outlet. The first opening and closing structure and the second opening and closing structure realize automatic temperature sensing and switching actions without manual switching; the shallow layer pipe and the deep layer pipe of the utility model are one pipe to only use the first half in summer, use whole tube length to exchange heat winter, have overall structure simple advantage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a buried pipe in a heat supply state according to an embodiment of the present invention;

FIG. 2 is a schematic view of a buried pipe in a cold state according to an embodiment of the present invention;

figure 3 is a schematic view of a first curved composition board and floating ball provided in an embodiment of the present invention.

Reference numerals illustrate: 101. a shallow water inlet pipe; 102. a deep water inlet pipe; 103. a deep horizontal pipe; 104. a deep water outlet pipe; 105. a shallow water outlet pipe; 106. a shallow horizontal pipe; 201. a first necking machine; 202. a floating ball; 203. a first curved composition plate; 301. a second necking device; 302. a connecting ball; 303. a third curved composition plate; 304. a second curved composition plate; 305. a connecting rod; 401. a backflow prevention rod.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

The invention provides a buried pipe, comprising: the water inlet pipe is provided with a water inlet; the water outlet pipe is arranged at intervals with the water inlet pipe and is provided with a water outlet; the horizontal pipe structure comprises a shallow horizontal pipe 106 and a deep horizontal pipe 103, and the shallow horizontal pipe 106 and the deep horizontal pipe 103 are respectively communicated with a water inlet pipe and a water outlet pipe; the first opening and closing structure is arranged in the water inlet pipe, and the height of the first opening and closing structure is lower than that of the shallow horizontal pipe 106; the second opening and closing structure is arranged in the shallow horizontal pipe 106. Through the setting of first structure and second structure of opening and close, need not to install multiple equipment in the buried pipe outside again, have simple structure's advantage.

Example 2

One embodiment of a buried pipe as shown in fig. 1-3, comprises: the water inlet pipe and the water outlet pipe are arranged in parallel at intervals, and a horizontal pipe structure is arranged between the water inlet pipe and the water outlet pipe, wherein the water inlet pipe and the water outlet pipe are both arranged perpendicular to the ground, the water inlet pipe is provided with a water inlet, and the water outlet pipe is provided with a water outlet.

As shown in fig. 1 and 2, the water inlet pipe is divided into a shallow water inlet pipe 101 and a deep water inlet pipe 102, and the water outlet pipe is respectively a shallow water outlet pipe 105 and a deep water outlet pipe 104. The horizontal pipe structure comprises a shallow horizontal pipe 106 and a deep horizontal pipe 103, wherein the shallow horizontal pipe 106 is respectively communicated with the shallow water inlet pipe 101 and the shallow water outlet pipe 105, and the deep horizontal pipe 103 is respectively communicated with the deep water inlet pipe 102 and the deep water outlet pipe 104.

As shown in fig. 1, 2 and 3, in order to control the water flow entering from the water inlet into the deep water inlet pipe 102, a first opening and closing structure is fixedly arranged in the deep water inlet pipe 102, and the height of the first opening and closing structure is lower than that of the shallow horizontal pipe 106. As shown in fig. 1 and 2, the first opening and closing structure includes a first necking device 201, a floating ball 202 and a first bending composition board 203, the first necking device 201 is fixedly arranged on the inner wall of the deep water inlet pipe 102, the first bending composition board 203 is arranged below the first necking device 201, and the floating ball 202 is positioned in the first necking device 201 and above the first bending composition board 203. As shown in fig. 3, the first curved composition plate 203 is elongated and has an edge adapted to the inner wall of the deep water inlet pipe 102.

As shown in fig. 1 and 2, in order to control water flow entering from a water inlet into a shallow horizontal pipe 106, a second opening and closing structure is arranged in the shallow horizontal pipe 106, the second opening and closing structure comprises a second necking device 301, a second bending composition plate 304 is arranged on the left side of the second necking device 301, a third bending composition plate 303 is arranged on the right side of the second necking device 301, a connecting rod 305 is fixed on the surface of the second bending composition plate 304 facing the third bending composition plate 303, a connecting ball 302 is fixed on the connecting rod 305, and the connecting ball 302 is in point contact with the third bending composition plate 303. To facilitate the floating ball 202 or the connecting ball 302 to block the flow passage of the necking tool, the outside-in flow cross-sectional areas of the first necking tool 201 and the second necking tool 301 are increased and then decreased. In order to ensure the deformation of the first curved composition board 203, the second curved composition board 304 and the third curved composition board 303, the first curved composition board, the second curved composition board and the third curved composition board are all composed of a first metal deformation sheet and a second metal deformation sheet, the thermal expansion coefficients of the first metal deformation sheet and the second metal deformation sheet are different, and water through holes are formed in the first metal deformation sheet, the second metal deformation sheet and the third metal deformation sheet. In order to prevent the occurrence of reverse flow, a reverse flow prevention rod 401 is provided in the deep water outlet pipe 104.

Of course, the structure of the first opening and closing structure and the second opening and closing structure is not limited in particular, and in other embodiments, the first opening and closing structure and the second opening and closing structure may be an electric control invention controlled by a sensor.

A heat exchange system comprises the buried pipe.

In the specific implementation process, when cold water is required to be supplied in summer, hot water with higher temperature enters the shallow water inlet pipe 101 from the water inlet, because the water temperature in the shallow water inlet pipe 101 is higher than that of the deep water inlet pipe 102, the first bending combined plate 203 bends upwards to drive the floating ball 202 to move upwards until the floating ball 202 blocks the flow passage of the first necking device 201, meanwhile, the second bending combined plate 304 bends towards the connecting ball 302 driven by the connecting rod 305 to move rightwards, the connecting ball 302 is far away from the second necking device 301, so that the hot water flows into the shallow water outlet pipe 105 after passing through the shallow horizontal pipe 106, and after full heat exchange, the water with lower temperature flows out from the water outlet; when hot water is needed to be supplied in winter, water with lower temperature flows into the shallow water inlet pipe 101 from the water inlet, because the temperature in the shallow water inlet pipe 101 is lower than that of the deep water inlet pipe 102, the first bending combination plate 203 cannot generate bending phenomenon, the floating ball 202 cannot block the flow channel of the first necking device 201, the water with lower temperature flows out from the water outlet after reaching the water outlet through the shallow water inlet pipe 101, the deep water inlet pipe 102, the deep water level pipe 103, the deep water outlet pipe 104 and the shallow water outlet pipe 105, and meanwhile, after full heat exchange, the temperature of the shallow water outlet pipe 105 is higher than that of the shallow water inlet pipe 101, namely, the water temperature at one end of the shallow water level pipe 106 close to the shallow water outlet pipe 105 is higher than that at one end of the shallow water inlet pipe 101, and the third bending combination plate 303 moves towards the second necking device 301 to drive the connecting ball 302 to block the flow channel of the second necking device 301.

As an alternative embodiment, the number of metal deformation sheets of the first curved composition plate 203, the second curved composition plate 304 and the third curved composition plate 303 may also be 3 sheets, 4 sheets or even more.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.

Claims (10)

1. A buried pipe, comprising:

the water inlet pipe is provided with a water inlet;

the water outlet pipe is arranged at intervals with the water inlet pipe and is provided with a water outlet;

the horizontal pipe structure comprises a shallow horizontal pipe (106) and a deep horizontal pipe (103), wherein the shallow horizontal pipe (106) and the deep horizontal pipe (103) are respectively communicated with a water inlet pipe and a water outlet pipe;

the first opening and closing structure is arranged in the water inlet pipe, and the height of the first opening and closing structure is lower than that of the shallow horizontal pipe (106);

and the second opening and closing structure is arranged in the shallow horizontal pipe (106).

2. A pipe-in-ground as claimed in claim 1, wherein the first opening and closing structure comprises a first necking device (201), a floating ball (202) and a first bending combined plate (203), the first necking device (201) is fixedly arranged on the inner wall of the water inlet pipe, the first bending combined plate (203) is arranged below the first necking device (201), and the floating ball (202) is arranged between the first bending combined plate (203) and the first necking device (201).

3. A buried pipe according to claim 2, wherein the second opening and closing structure comprises a second necking device (301), a second bending combined plate (304), a connecting rod (305) and a connecting ball (302), the second necking device (301) is fixedly arranged on the inner wall of the shallow horizontal pipe (106), and two ends of the connecting rod (305) are respectively fixedly connected with the second bending combined plate (304) and the connecting ball (302).

4. A pipe-in-ground as claimed in claim 3, wherein the second opening and closing structure further comprises a third curved composition plate (303), the second curved composition plate (304) and the third curved composition plate (303) being provided on the left and right sides of the second necking device (301), respectively.

5. A pipe-in-ground as claimed in claim 4, wherein the cross-sectional areas of the first and second necking machines (201, 301) increase and decrease from the water flow direction.

6. A buried pipe according to claim 5, characterized in that the first (203), second (304) and third (303) curved composition plates each consist of a first and a second metal deformation sheet, the first and second metal deformation sheets having different coefficients of thermal expansion.

7. A buried pipe according to claim 6, wherein the water inlet pipe comprises a shallow water inlet pipe (101) and a deep water inlet pipe (102), the first opening and closing structure being arranged in the deep water inlet pipe (102); the water outlet pipe comprises a shallow water outlet pipe (105) and a deep water outlet pipe (104), and an anti-backflow rod (401) is arranged in the deep water outlet pipe (104).

8. A buried pipe according to any one of claims 1 to 7, wherein said water inlet pipe and water outlet pipe are arranged in parallel.

9. A heat exchange system comprising a buried pipe as claimed in any one of claims 1 to 8.

10. A method of using a buried pipe as defined in claim 1, comprising the steps of:

when the water cooling device is in a cooling state, the first opening and closing structure is in a closing state, and the second opening and closing structure is in an opening state, so that water flows through the shallow horizontal pipe for heat exchange, enters the water outlet pipe, and flows out from the water outlet;

when the water heater is in a heating state, the first opening and closing structure is in an opening state, and the second opening and closing structure is in a closing state, so that water flows through the deep horizontal pipe for heat exchange, enters the water outlet pipe, and flows out from the water outlet.

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