Intelligent temperature control water thermostat for nuclear power concrete mixing plant

Abstract

The utility model belongs to the technical field of concrete mixing plant equipment, and particularly relates to a water thermostat for an intelligent temperature control nuclear power concrete mixing plant. Comprising a water storage tank and a plurality of steam spraying mechanisms, a stirring shaft is rotationally installed in the water storage tank, a steam rotating joint is fixedly installed at the bottom end of the water storage tank, the lower portion of the stirring shaft is hollow and open, the stirring shaft is sleeved with a plurality of axial flow stirring paddles, the bottom end of the stirring shaft is fixedly connected with the rotating end of the steam rotating joint, and the steam rotating joint is communicated with an inner cavity of the stirring shaft; the steam spraying mechanism comprises a shaft sleeve and a plurality of steam spraying pipes, the steam spraying pipes penetrate through and are welded to the shaft sleeve, the shaft sleeve is fixedly connected to the stirring shaft in a sleeving mode, the steam spraying pipes are communicated with an inner cavity of the stirring shaft, and a plurality of steam spraying holes are formed in the steam spraying pipes. According to the utility model, the water temperature can be quickly increased by directly using a steam heating mode, the heating efficiency is improved, and the influence on the production of concrete is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete mixing station equipment, and in particular relates to an intelligent temperature-controlled water constant temperature device for nuclear power concrete mixing stations. Background Art

[0002] Compared with general industrial and civil construction projects, nuclear power projects have a longer construction period and are more difficult to build. Given the particularity of nuclear safety requirements, concrete, as one of the main materials for nuclear power project construction, faces more challenges. The performance of concrete plays an important role in the safe and reliable operation of nuclear power plants throughout their life cycle, and nuclear power concrete is required to have good working performance and quality. Nuclear power concrete has corresponding technical documents, construction procedures and other controls in all aspects, including raw material selection, on-site inspection, mix design, concrete production, on-site pouring and maintenance.

[0003] Nuclear power projects require a lot of large-volume concrete. During winter construction, water temperature has a greater impact on the quality of concrete. The current common practice is to set up a constant temperature water tank and heat the water through a steam jacket or steam coil to keep the water at a constant temperature. However, nuclear power projects require a large amount of concrete and intermittent water consumption. The heat exchange efficiency of the steam jacket or steam coil heating method is low, and the water in the constant temperature water tank cannot quickly reach the required temperature after it is used up at one time. Summary of the invention

[0004] The utility model aims to provide an intelligent temperature-controlled water thermostat for a nuclear power concrete mixing station to solve the problems existing in the prior art.

[0005] The utility model solves the technical problem by adopting the following technical solution: an intelligent temperature-controlled water thermostat for a nuclear power concrete mixing station, comprising a water storage tank and a plurality of steam spraying mechanisms, a stirring shaft is rotatably installed in the water storage tank, a steam rotary joint is fixedly installed at the bottom of the water storage tank, the lower part of the stirring shaft is hollow and open, a plurality of axial flow stirring paddles are sleeved on the stirring shaft, the bottom end of the stirring shaft is fixedly connected to the rotating end of the steam rotary joint, and the steam rotary joint is communicated with the inner cavity of the stirring shaft;

[0006] The steam injection mechanism comprises a shaft sleeve and a plurality of steam injection pipes. The steam injection pipes penetrate and are welded on the shaft sleeve. The shaft sleeve is fixedly sleeved on the stirring shaft. The steam injection pipes are communicated with the inner cavity of the stirring shaft. The steam injection pipes are provided with a plurality of steam injection holes.

[0007] Furthermore, a water inlet, an exhaust port, and an installation port are provided at the upper end of the water tank, a water outlet and a steam inlet are provided at the lower end of the water tank, legs are welded at the bottom of the water tank, a temperature sensor is installed on the outer wall of the water tank, a bracket is flange-connected at the installation port, and an upper bearing seat is installed on the bracket.

[0008] Furthermore, after the shaft head at the upper end of the stirring shaft is fixed to the rotating end of the upper bearing seat, the other end of the stirring shaft extends into the water tank from the installation port. The stirring shaft and the installation port are connected by a mechanical seal. The lower end of the stirring shaft is directly rushing into the steam port. The shaft head at the lower end of the stirring shaft is rotatably connected to the lower bearing seat. Three support rods are welded to the outer wall of the lower bearing seat. The three support rods are distributed in a circular array with the central axis of the lower bearing seat as the axis. The other ends of the three support rods are welded to the inner wall of the water tank. The stirring shaft is rotatably installed inside the water tank through the upper bearing seat, the bracket, the lower bearing seat, and the support rods.

[0009] Furthermore, the fixed end flange of the steam rotary joint is connected to the outside of the steam inlet of the water tank, and the rotating end of the steam rotary joint extends into the water tank from the steam inlet and is fixedly connected to the lower end shaft head of the stirring shaft.

[0010] Furthermore, there are three steam injection pipes in the steam injection mechanism, which are arc-shaped hollow pipes. The three steam injection pipes are distributed in a circular array with the central axis of the sleeve as the axis, and a plurality of steam injection holes are distributed on one side of the inner arc of the steam injection pipe and the free end of the steam injection pipe.

[0011] Furthermore, the steam injection mechanism and the axial flow stirring paddles are distributed on the stirring shaft at intervals.

[0012] Furthermore, a plurality of steam holes penetrating the stirring shaft are provided on the outer wall of the hollow lower part of the stirring shaft, and the positions and number of the steam holes match the positions and number of the steam injection pipe penetrating the shaft sleeve end, and the steam injection pipe is connected with the inner cavity of the stirring shaft through the steam holes.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model can quickly increase the water temperature by directly using steam heating, thereby improving the heating efficiency and preventing the production of concrete from being affected.

[0015] 2. Steam is sprayed into the water through the steam injection mechanism to directly heat the water, and the reverse thrust of the steam drives the stirring shaft to rotate, so that the stirring shaft can be rotated without the use of electric drive, which not only increases the heat transfer efficiency, but also stirs the water. When the steam is stopped, the stirring stops to prevent heat loss. Since the steam directly contacts the water to heat it up, the heat transfer efficiency is high, and the local circulation of water further accelerates the heating speed, thereby achieving the purpose of rapid heating.

[0016] 3. The stirring shaft is heavy, and the two ends of the stirring shaft are connected by the upper bearing seat and the lower bearing seat, so that the stirring shaft is more stable and firm when rotating. The installation port is sealed by a mechanical seal to reduce heat loss.

[0017] 4. Due to the high steam pressure, high-pressure air with a certain amount of heat is formed above the liquid level in the water storage tank. The high-pressure air with heat is discharged from the exhaust port and can be used to heat the water source and recover the waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the structure of the steam injection mechanism of the utility model from a top view.

[0020] Among them: 1. water storage tank; 2. stirring shaft; 3. steam rotary joint; 4. axial flow stirring paddle; 5. shaft sleeve; 6. steam spray pipe; 7. steam spray hole; 8. water inlet; 9. exhaust port; 10. installation port; 11. water outlet; 12. steam inlet; 13. support leg; 14. temperature sensor; 15. bracket; 16. upper bearing seat; 17. mechanical seal; 18. lower bearing seat; 19. support rod; 20. steam hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with specific embodiments and drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] like Figure 1-2 As shown, an intelligent temperature-controlled water thermostat for a nuclear power concrete mixing station comprises a water storage tank 1 and a plurality of steam injection mechanisms. A stirring shaft 2 is rotatably installed in the water storage tank 1, a steam rotary joint 3 is fixedly installed at the bottom of the water storage tank 1, the lower part of the stirring shaft 2 is hollow and open, a plurality of axial flow stirring paddles 4 are sleeved on the stirring shaft 2, the bottom end of the stirring shaft 2 is fixedly connected to the rotating end of the steam rotary joint 3, and the steam rotary joint 3 is communicated with the inner cavity of the stirring shaft 2;

[0023] The steam injection mechanism includes a shaft sleeve 5 and a plurality of steam injection pipes 6. The steam injection pipes 6 penetrate through and are welded to the shaft sleeve 5. The shaft sleeve 5 is fixedly sleeved on the stirring shaft 2. The steam injection pipes 6 are connected to the inner cavity of the stirring shaft 2. The steam injection pipes 6 are provided with a plurality of steam injection holes 7.

[0024] The steam rotary joint 3 is a connection device with one end fixed and the other end rotating, which can realize steam transmission in a rotating state.

[0025] A water inlet 8, an exhaust port 9 and a mounting port 10 are provided at the upper end of the water tank 1, a water outlet 11 and a steam inlet 12 are provided at the lower end of the water tank 1, a support leg 13 is welded to the bottom of the water tank 1, a temperature sensor 14 is installed on the outer wall of the water tank 1, a bracket 15 is flange-connected at the mounting port 10, and an upper bearing seat 16 is installed on the bracket 15.

[0026] After the upper end of the stirring shaft 2 is fixed to the rotating end of the upper bearing seat 16, the other end of the stirring shaft 2 is inserted into the water storage tank 1 from the installation port 10. The stirring shaft 2 and the installation port 10 are connected by a mechanical seal 17. The lower end of the stirring shaft 2 is rushing into the steam port 12. The lower end of the stirring shaft 2 is rotatably connected to the lower bearing seat 18. Three support rods 19 are welded to the outer wall of the lower bearing seat 18. The three support rods 19 are distributed in a circular array with the central axis of the lower bearing seat 18 as the axis. The other ends of the three support rods 19 are welded to the inner wall of the water storage tank 1. The stirring shaft 2 is rotatably installed in the water storage tank 1 through the upper bearing seat 16, the bracket 15, the lower bearing seat 18, and the support rods 19.

[0027] The stirring shaft 2 is heavy, and the two ends of the stirring shaft 2 are connected by an upper bearing seat 16 and a lower bearing seat 18, so that the stirring shaft 2 is more stable and firm when rotating. The installation port 10 is sealed by a mechanical seal 17 to reduce heat loss.

[0028] The fixed end flange of the steam rotary joint 3 is connected to the outer side of the steam inlet 12 of the water tank 1 , and the rotating end of the steam rotary joint 3 extends into the water tank 1 from the steam inlet 12 and is fixedly connected to the lower end shaft head of the stirring shaft 2 .

[0029] There are three steam injection pipes 6 in the steam injection mechanism. The steam injection pipes 6 are arc-shaped hollow pipes. The three steam injection pipes 6 are distributed in a circular array with the central axis of the sleeve 5 as the axis. A plurality of steam injection holes 7 are distributed on one side of the inner arc of the steam injection pipe 6 and on the free end of the steam injection pipe 6.

[0030] The steam injection mechanism is used to inject steam into the water, and drive the stirring shaft 2 to rotate through the reverse thrust of the steam, so that the stirring shaft 2 can be rotated without using electric drive, which not only increases the heat transfer efficiency, but also stirs the water. When the steam is stopped, the stirring stops to prevent heat loss.

[0031] The steam injection mechanism and the axial flow stirring blades 4 are distributed at intervals on the stirring shaft 2. The axial flow stirring blades 4 circulate the water to accelerate the heat transfer of the steam in the water.

[0032] A plurality of steam holes 20 penetrating the stirring shaft 2 are provided on the outer wall of the hollow lower part of the stirring shaft 2. The positions and number of the steam holes 20 match the positions and number of the steam injection pipe 6 penetrating the end of the shaft sleeve 5. The steam injection pipe 6 is connected to the inner cavity of the stirring shaft 2 through the steam holes 20.

[0033] The working principle of the utility model is:

[0034] When in use, connect the steam pipeline of the mixing station to the steam inlet end of the steam rotary joint 3, connect the water supply pipeline and the pump to the water inlet 8, connect the exhaust port 9 to the water source storage tank through the exhaust pipeline for waste heat recovery, connect the water outlet 11 to the water metering system of the mixing station through the water outlet pipeline and the pump, and install the corresponding solenoid valve to control the supply of water and steam through the solenoid valve.

[0035] After water is poured into the water storage tank 1 and reaches the set liquid level (a water storage container with a liquid level gauge is a conventional technical means, which will not be repeated here), the temperature sensor 14 detects the water temperature. When the water temperature is lower than the set value, steam enters the inner cavity of the stirring shaft 2 from the steam inlet end of the steam rotary joint 3. After the water in the inner cavity is pushed out, the steam is ejected from the steam injection hole 7 of the steam injection mechanism. Under the pressure of the steam, the ejected steam generates a certain thrust on the steam injection pipe 6. Since the stirring shaft 2 is rotatably installed in the water storage tank 1, the stirring shaft 2 starts to rotate, and the axial flow stirring blade 4 rotates accordingly, and the water produces an axial circulation flow. Since the steam directly contacts the water to heat it up, the heat transfer efficiency is high. In addition, the local circulation of water further accelerates the speed of heating, thereby achieving the purpose of rapid heating.

[0036] Due to the high steam pressure, high-pressure air with a certain amount of heat is formed above the liquid level of the water storage tank 1, and the high-pressure air with heat is discharged from the exhaust port 9, and the waste heat can be recovered. On the one hand, the water supply pipeline can be laid in parallel with the exhaust pipeline, making full use of the waste heat of the exhaust pipeline to prevent the water supply pipeline from freezing, and on the other hand, it can be passed into the water source storage pool for waste heat recovery to prevent the pool from freezing easily in winter.

[0037] After the water temperature reaches the set value, the steam stops flowing in. When water is used, the water in the water storage tank 1 is pumped to the water metering system through the water outlet pipeline. When water replenishment is needed, water is replenished in the water storage tank 1 through the water supply pipeline.

[0038] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention shall fall within the scope of protection of the present invention.

[0039] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. An intelligent temperature-controlled water thermostat for nuclear power concrete mixing station, characterized in that: It comprises a water storage tank and several steam injection mechanisms. A stirring shaft is rotatably installed in the water storage tank. A steam rotary joint is fixedly installed at the bottom of the water storage tank. The lower part of the stirring shaft is hollow and open. Several axial flow stirring paddles are sleeved on the stirring shaft. The bottom end of the stirring shaft is fixedly connected to the rotating end of the steam rotary joint. The steam rotary joint is communicated with the inner cavity of the stirring shaft. The steam injection mechanism comprises a shaft sleeve and a plurality of steam injection pipes. The steam injection pipes penetrate and are welded on the shaft sleeve. The shaft sleeve is fixedly sleeved on the stirring shaft. The steam injection pipes are communicated with the inner cavity of the stirring shaft. The steam injection pipes are provided with a plurality of steam injection holes.

2. The intelligent temperature-controlled water thermostat for nuclear power concrete mixing station according to claim 1 is characterized in that: The water tank is provided with a water inlet, an exhaust port and a mounting port at the upper end, a water outlet and a steam inlet at the lower end, legs are welded to the bottom of the water tank, a temperature sensor is installed on the outer wall of the water tank, a bracket is flange-connected at the mounting port, and an upper bearing seat is installed on the bracket.

3. The intelligent temperature-controlled water thermostat for nuclear power concrete mixing station according to claim 2 is characterized in that: After the shaft head at the upper end of the stirring shaft is fixed to the rotating end of the upper bearing seat, the other end of the stirring shaft extends into the water storage tank from the installation port. The stirring shaft and the installation port are connected by a mechanical seal. The lower end of the stirring shaft is rushing into the steam port. The shaft head at the lower end of the stirring shaft is rotatably connected to the lower bearing seat. Three support rods are welded on the outer wall of the lower bearing seat. The three support rods are distributed in a circular array with the central axis of the lower bearing seat as the axis. The other ends of the three support rods are welded to the inner wall of the water storage tank. The stirring shaft is rotatably installed in the water storage tank through the upper bearing seat, the bracket, the lower bearing seat, and the support rods.

4. The intelligent temperature-controlled water thermostat for nuclear power concrete mixing station according to claim 3 is characterized in that: The fixed end flange of the steam rotary joint is connected to the outer side of the steam inlet of the water tank, and the rotating end of the steam rotary joint penetrates into the water tank from the steam inlet and is fixedly connected to the lower end shaft head of the stirring shaft.

5. The intelligent temperature-controlled water thermostat for nuclear power concrete mixing station according to claim 1 is characterized in that: There are three steam injection pipes in the steam injection mechanism. The steam injection pipes are arc-shaped hollow pipes. The three steam injection pipes are distributed in a circular array with the central axis of the sleeve as the axis. A plurality of steam injection holes are distributed on one side of the inner arc of the steam injection pipe and the free end of the steam injection pipe.

6. The intelligent temperature-controlled water thermostat for nuclear power concrete mixing station according to claim 5 is characterized in that: The steam injection mechanism and the axial flow stirring paddles are distributed on the stirring shaft at intervals.

7. The intelligent temperature-controlled water thermostat for nuclear power concrete mixing station according to claim 6 is characterized in that: The outer wall of the hollow lower part of the stirring shaft is provided with a plurality of steam holes penetrating the stirring shaft, the positions and number of the steam holes match the positions and number of the steam injection pipe penetrating the shaft sleeve end, and the steam injection pipe is connected with the inner cavity of the stirring shaft through the steam holes.

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