Hot and cold water mixing device for heat supply network

Abstract

The utility model discloses a heat supply network cold and hot water mixing device which comprises a horizontal closed cylindrical box body, two ends of the box body are fixedly connected with a second water inlet pipe, a water outlet pipe and a first water inlet pipe respectively, a hollow shaft is further arranged in the box body along the center of the box body, two ends of the shaft are rotatably connected with the box body, one end of the shaft is plugged, and the other end of the shaft is sealed. A spray pipe used for driving the shaft to rotate is fixedly arranged on the shaft, and the spray pipe is communicated with the shaft. Cold water enters the shaft from the first water inlet pipe and then is sprayed out in the tangential direction through the spray head at the outer end of the spray pipe to drive the shaft to rotate and further drive the blades to rotate together to stir hot water entering the box body through the second water inlet pipe, so that the hot water and the cold water are fully mixed in the box body, and mixing is more uniform; and the mixed water discharged from the water outlet pipe is not easy to suddenly cool or hot.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal energy utilization in thermal power plants, in particular to a hot water and cold water mixing device for a heating network. Background Art

[0002] In the utilization of thermal energy in thermal power plants, the heat energy is transferred to the secondary network through the primary network through the heat exchanger, and then the secondary network uses the heat energy for production or life.

[0003] Hot water in the secondary pipe network or water heated again through the secondary pipe network often needs to be mixed with cold water to adjust the water temperature during use. The current temperature adjustment method is to mix cold water directly into the hot water pipe through the pipe, and then flow out for production or life. For example, if a mixing valve is used, cold water and hot water are input, and mixed water is output. This adjustment method is very inconvenient to control the temperature, and the cold and hot water are mixed unevenly, which can easily lead to large changes in the temperature of the output mixed water, resulting in hot and cold phenomena. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a hot water and cold water mixing device for a heating network, so as to solve the problem that the currently adopted water temperature regulating method easily leads to uneven mixing of hot and cold water and large temperature changes of the mixed water.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] A hot water and cold water mixing device of a heating network comprises a horizontal closed cylindrical box, one end of the box is fixedly connected to a first water inlet pipe and a second water inlet pipe, and the other end is fixedly connected to a water outlet pipe. A hollow shaft is also provided inside the box along its center, both ends of the shaft are rotatably connected to the box, one end of the shaft is blocked, and the other end is communicated with the first water inlet pipe. A nozzle is fixedly provided on the shaft for driving the rotation thereof, and the nozzle is communicated with the shaft.

[0007] Furthermore, one end of the nozzle is vertically fixedly connected to the axis, and the other end is a nozzle. The plane passing through the axis and the nozzle forms an angle with the water outlet direction of the nozzle.

[0008] Furthermore, a plane passing through the axis and the nozzle is perpendicular to the water outlet direction of the nozzle.

[0009] Furthermore, there are at least two nozzles evenly distributed along the axis, and the torques generated on the axis when the nozzle sprays water are in the same direction.

[0010] Furthermore, the shaft is also fixedly provided with paddles for driving the water in the box to rotate, and the paddles and the nozzles are cross-arranged along the circumferential direction of the shaft.

[0011] Furthermore, the nozzle is fixedly connected to a paddle for driving the water in the box to rotate.

[0012] Furthermore, the first water inlet pipe is arranged at the center of the side surface of the box body, and the first water inlet pipe is fixedly connected to the box body through.

[0013] Furthermore, a sewage pipe is fixedly connected to the bottom of the box body, and a valve is installed on the sewage pipe.

[0014] The positive effects of the utility model are:

[0015] The box body is provided with a first water inlet pipe, a water outlet pipe, a sewage pipe and a second water inlet pipe. A hollow shaft connected to the first water inlet pipe is provided in the box body, and a nozzle is provided on the shaft. Cold water enters the shaft from the first water inlet pipe, and then is sprayed out tangentially through the nozzle at the outer end of the nozzle, driving the shaft to rotate, and then driving the paddle to rotate together, stirring the hot water entering the box body through the second water inlet pipe, so that the hot water and the cold water are fully mixed in the box body, and the mixing is more uniform, and the mixed water discharged from the water outlet pipe will not be hot and cold, or unevenly hot and cold.

[0016] When the blades rotate, the scale in the box, especially at the bottom, is stirred up to avoid scale accumulation in the box. The suspension formed by water and scale can be discharged from the sewage pipe.

[0017] In addition, the utility model can also be used for water replenishment of the primary or secondary pipeline network of a thermal power plant, so as to avoid the primary or secondary pipeline network being hot and cold and the large temperature change caused by directly adding cold water, which may cause excessive stress changes in the pipeline due to thermal expansion and contraction, resulting in leakage of pipeline seals or rupture of the pipeline and water leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of Example 1;

[0019] Figure 2 is a schematic diagram of the arrangement of the nozzle and the blades on the circumference of the shaft in Example 1;

[0020] Figure 3 is a schematic structural diagram of Example 2;

[0021] Figure 4 is a schematic diagram of the arrangement of the nozzle and the blades on the circumference of the shaft in Example 2;

[0022] In the figure, 1, outer cylinder; 2, insulation layer; 3, inner liner; 6, blades; 7, nozzle; 8, shaft; 9, end cover; 10, first water inlet pipe; 11, water outlet pipe; 12, sewage pipe; 13, second water inlet pipe. DETAILED DESCRIPTION

[0023] Example 1

[0024] like Figure 1 and Figure 2 As shown, a solar water heater with descaling function comprises a closed cylindrical horizontal box, a first water inlet pipe 10 is arranged at the center of the right side of the box, a second water inlet pipe 13 is arranged near the bottom of the right side of the box, and a water outlet pipe 11 is arranged near the top of the left side of the box. The box comprises a cylindrical inner tank 3 and an outer cylinder 1 sleeved outside the inner tank 3, a heat preservation layer 2 made of polyurethane is filled between the inner tank 3 and the outer cylinder 1, and the second water inlet pipe 13, the first water inlet pipe 10, the second water inlet pipe 13 and the water outlet pipe 11 are all penetrated and welded with the inner tank 3.

[0025] A cylindrical boss protruding to the right is welded to the center of the inner wall at the left end of the inner liner 3, and a cylindrical end cover 9 covering the first water inlet pipe 10 is welded to the center of the inner wall at the right end of the inner liner 3. A circular plugging plate is welded to the left end of the end cover 9, and the plugging plate has a hole in the center. A short tube facing left is welded to the left end of the plugging plate at the position corresponding to the hole. A hollow shaft 8 is provided inside the inner liner 3 along its center line. The left end of the shaft 8 is sealed and rotatably connected to the boss, and the right end of the shaft 8 is inserted into the short tube and rotatably connected to the short tube. Three nozzle groups are distributed on the shaft 8 along its axial direction, and each nozzle group includes two L-shaped nozzles 7 evenly distributed along the circumference of the shaft 8, and the parts of the nozzles 7 close to the shaft 8 are perpendicular to the shaft 8. The inner end of each nozzle 7 is welded to and connected with the shaft 8, and the outer end is a conical nozzle. The axis of the nozzle is perpendicular to the shaft 8 in space. The torque direction generated by all nozzles on the shaft 8 when spraying water is consistent, and the two adjacent nozzle groups are perpendicular in space.

[0026] The shaft 8 is also fixed with a blade group for driving the water in the box to rotate. Each blade group includes two rectangular blades 6 symmetrically welded on both sides of the shaft 8. The blade group is arranged between two adjacent nozzle groups. The angle between the blade 6 of each blade group and the nozzle 7 of the two adjacent nozzle groups is 45 degrees.

[0027] Hot water is introduced into the first water inlet pipe 10, and cold water is introduced into the second water inlet pipe 13. The cold water enters the shaft 8 from the first water inlet pipe 10, and then is ejected tangentially through the nozzle at the outer end of the nozzle 7, driving the shaft 8 to rotate, and then driving the paddle 6 to rotate together, stirring the hot water entering the inner tank 3 through the second water inlet pipe 13, so that the hot water and the cold water are fully mixed in the inner tank 3 with a larger space, and the mixing is more uniform. The mixed water is discharged through the water outlet pipe 11, and the mixed water will not be hot and cold.

[0028] Example 2

[0029] like Figure 3 and Figure 4 As shown, the difference between this embodiment and embodiment 1 is that:

[0030] The blades 6 are welded to the outer wall of the nozzle 7 and are aligned with the inner portion of the nozzle 7, thereby saving axial space of the box body and being suitable for a short and thick box body.

[0031] Example 3

[0032] The difference between this embodiment and embodiment 1 is that:

[0033] A drain pipe 12 is welded through the bottom of the inner liner 3 near the middle, and a valve is connected to the drain pipe 12. When the paddle rotates, the scale in the inner liner 3, especially at the bottom of the inner liner 3, is stirred up to avoid scale accumulation in the inner liner 3. The suspension formed by water and scale can be discharged from the drain pipe 12 by opening the valve on the drain pipe 12.

[0034] The above-mentioned embodiments describe content in a relatively detailed and specific manner, expressing the preferred embodiments of the present utility model, and are only used to illustrate the technical ideas and features of the present utility model. The purpose is to enable technicians in this field to understand the content of the present utility model and implement it accordingly, but it is not limited to the present utility model. The protection scope of the present utility model cannot be limited only by this embodiment, that is, any equivalent changes or modifications made to the spirit disclosed by the present utility model, for researchers or technicians in this field, without departing from the structure of the present utility model, local improvements within the system and changes and conversions between subsystems, etc., are still within the protection scope of the present utility model.

Claims

1. A hot water and cold water mixing device for a heating network, characterized in that: The invention comprises a horizontal closed cylindrical box, one end of which is fixedly connected to a first water inlet pipe (10) and a second water inlet pipe (13), and the other end of which is fixedly connected to a water outlet pipe (11). A hollow shaft (8) is also provided in the box along its center, and both ends of the shaft (8) are rotatably connected to the box. One end of the shaft (8) is blocked, and the other end is connected to the first water inlet pipe (10). A nozzle (7) is fixedly provided on the shaft (8) for driving the shaft to rotate, and the nozzle (7) is connected to the shaft (8).

2. A hot water and cold water mixing device for a heating network according to claim 1, characterized in that: One end of the nozzle (7) is vertically fixedly connected to the shaft (8), and the other end is a nozzle. A plane passing through the shaft (8) and the nozzle (7) forms an angle with the water outlet direction of the nozzle.

3. A hot water and cold water mixing device for a heating network according to claim 2, characterized in that: The plane passing through the axis (8) and the nozzle (7) is perpendicular to the water outlet direction of the nozzle.

4. A hot water and cold water mixing device for a heating network according to claim 2, characterized in that: The nozzles (7) are at least two evenly distributed along the axis (8), and the torques generated on the axis (8) when the nozzles spray water are in the same direction.

5. A hot and cold water mixing device for a heating network according to claim 2, characterized in that: The shaft (8) is also fixedly provided with a paddle (6) for driving the water in the box to rotate, and the paddle (6) and the nozzle (7) are arranged crosswise along the circumferential direction of the shaft (8).

6. A hot water and cold water mixing device for a heating network according to claim 2, characterized in that: The nozzle (7) is also fixedly connected to a paddle (6) for driving the water in the box to rotate.

7. A hot water and cold water mixing device for a heating network according to claim 1, characterized in that: The first water inlet pipe (10) is arranged at the center of the side surface of the box body, and the first water inlet pipe (10) is fixedly connected to the box body through the pipe.

8. A hot water and cold water mixing device for a heating network according to claim 1, characterized in that: The bottom of the box is fixedly connected with a sewage discharge pipe (12), and a valve is installed on the sewage discharge pipe (12).

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