Concrete admixture heat preservation storage tank

Abstract

The utility model discloses a concrete admixture heat preservation storage tank which comprises a tank body, a heat exchange device is arranged in the tank body, a heating device is arranged outside the tank body, the heat exchange device comprises at least two supporting rods supported at the bottom in the tank body and a plurality of heat exchange pipe pieces fixed to the supporting rods, observation is conducted from top to bottom, and the heat exchange pipe pieces are in a circular ring shape; each heat exchange pipe piece is provided with a rectangular-section channel, the rectangular-section channels of the heat exchange pipe pieces are communicated end to end, the heating device comprises a heating water tank and a circulating pump, the heating water tank is filled with heat exchange media, an inlet of the circulating pump is connected with an outlet of the heating water tank, and an outlet of the circulating pump is connected with the heat exchange pipe piece at the lowermost end through a water inlet pipe. The heat exchange pipe piece at the uppermost end is connected with an inlet of the heating water tank through a water outlet pipe. The heat exchange device disclosed by the utility model is compact in structure and high in heat exchange efficiency, and the heat exchange device is matched with the heating device, so that the temperature of an additive inside and outside the tank body can be controlled within a controllable range, and the temperature is uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete preparation, in particular to a concrete admixture insulation storage tank. Background Art

[0002] Concrete admixtures are substances added during the concrete mixing process to improve the performance of concrete. The amount of admixtures should not exceed 5% of the cement mass. Liquid polycarboxylic acid high-performance water reducers generally contain 75% or more of water. In an environment below minus 5 degrees, the admixture will solidify, significantly affecting the use effect. Therefore, the admixture storage tank for concrete mixing plants usually needs to adopt insulation measures.

[0003] Chinese patent CN211054108U discloses a winter heat preservation device for admixtures used in concrete production, including a bottom plate, an isolation block and a storage bucket, a heating pipe is provided on the inner side of the storage bucket, a fixed block is fixedly connected at the central position of the top surface of the bottom plate, a vertical pipe is fixedly connected to the top surface of the fixed block, a water tank and a circulation pump arranged on the left and right are fixedly connected to the left side of the top surface of the bottom plate, an output pump is fixedly connected to the right side of the top surface of the bottom plate, the input end of the output pump is connected to the storage bucket, a temperature sensor is fixedly connected to the front side of the fixed block, a controller is fixedly connected to the left side of the water tank, and a heating wire is fixedly connected to the heating pipe through a bracket. The heat exchange module of this patent is located at the bottom of the tank body and docked with the insulation layer outside the tank body. The heat exchange efficiency is low, the equipment power is large, the thawing efficiency is low, and the structural limitations make it impossible to completely discharge the heat exchange liquid.

[0004] Chinese patent CN216419114U discloses a novel concrete admixture heating and stirring device, comprising: a cylinder, an insulation box is arranged outside the side wall of the cylinder, a heating pipe is arranged inside the insulation box, the heating pipe runs through the insulation box, one end of the heating pipe is connected to a heat transfer oil pump, the heat transfer oil pump is connected to a heat transfer oil tank, a heater is arranged inside the heat transfer oil tank, and the other end of the heating pipe is connected to the heat transfer oil tank. The heat exchange module of this patent is located outside the outer layer of the tank, and the heat exchange efficiency is low. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a concrete admixture insulation storage tank.

[0006] The technical solution adopted by the utility model is:

[0007] A concrete admixture heat-insulating storage tank comprises a tank body, a heat exchange device is arranged inside the tank body, and a heating device is arranged outside the tank body, the heat exchange device comprises at least two support rods supported at the bottom of the tank body and a plurality of heat exchange tube sheets fixed on the support rods, and the plurality of heat exchange tube sheets are in a circular ring shape when viewed from top to bottom; each heat exchange tube sheet has a rectangular cross-section channel, and the rectangular cross-section channels of the plurality of heat exchange tube sheets are connected end to end, and the heating device comprises a heating water tank and a circulating pump, the heating water tank is filled with heat exchange medium, the circulating pump inlet is connected to the heating water tank outlet, the circulating pump outlet is connected to the lowest heat exchange tube sheet through a water inlet pipe, and the highest heat exchange tube sheet is connected to the heating water tank inlet through a water outlet pipe.

[0008] Furthermore, the heat exchange tube sheets are in the shape of a ring with a notch, and are fixed on the support rods in sequence at equal intervals from top to bottom, and all the heat exchange tube sheets are connected end to end by connecting pipes.

[0009] Furthermore, the heat exchange tube sheets are connected end to end in a spiral shape and wrapped around the support rod.

[0010] Furthermore, the distance between two adjacent pipe segments is 5-10 cm, and the outer side of the pipe segment is 10-50 cm away from the inner side of the storage tank.

[0011] Furthermore, an electric heater is provided at the bottom of the heating water tank, and a first temperature sensor is provided in the heating water tank.

[0012] Furthermore, a second temperature sensor is provided in the tank body.

[0013] Furthermore, an outer wall of the tank body is provided with a heat-insulating layer.

[0014] Beneficial effects of the utility model:

[0015] 1. By arranging annular heat exchange tube sheets inside the tank body, the heat exchange medium in the heating water tank enters the lowest heat exchange tube sheet through the circulating pump, flows upward through each heat exchange tube sheet in turn to exchange heat with the water coolant and cool down, and then returns to the heating water tank through the return pipe, so that the circulation flow cools the additive; in this process, since the additive at the bottom of the tank body first contacts with the high-temperature hot water, the temperature rises greatly, and the additive at the top of the tank body contacts with the cooled heat exchange medium, the temperature rises less, so the additive at the bottom of the tank body with a higher temperature forms convection with the additive at the top of the tank body with a lower temperature, and the convection heat exchange is used to further increase the heat exchange efficiency and make the temperature of the additives inside and outside the tank body uniform.

[0016] 2. The annular heat exchange tube sheet with a rectangular cross-section channel can reduce the size of the radial space occupied by the heat exchange tube sheet while ensuring a larger hot water flow rate, and does not hinder the installation of a stirring device in the tank body; and, compared with a circular heat exchange tube, a rectangular heat exchange tube sheet has a larger heat exchange area and a higher heat transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the concrete admixture insulation storage tank of the present application.

[0018] Figure 2 for Figure 1 Top view of the tank.

[0019] Figure 3 This is a schematic diagram of the structure of the heat exchange tube sheet of Example 1.

[0020] Figure 4 This is a schematic diagram of the structure of the heat exchange tube sheet of Example 2.

[0021] Figure 5 It is a cross-sectional structural diagram of the heat exchange tube sheet of Example 1 and Example 2. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and a preferred implementation manner.

[0023] Example 1

[0024] See also Figure 1-Figure 3 , Figure 5 This embodiment provides a concrete admixture insulation storage tank, including a tank body 10, a heat exchange device 20 is provided inside the tank body, and a heating device 30 is provided outside the tank body.

[0025] The tank body 10 is cylindrical and has an open top. Taking the storage of 10 tons of admixture as an example, the designed tank body diameter is 2300mm and the height is 2465mm. The tank body is made of two layers of stainless steel plates with three support rods 21, and a layer of thermal insulation cotton is sandwiched between the two layers of stainless steel plates.

[0026] The heat exchange device 20 includes three support rods 21 and seven annular heat exchange tube sheets 22. The lower ends of the three support rods 21 are supported on the bottom of the tank body 10, and the center lines thereof are connected to form an equilateral triangle.

[0027] Seven annular heat exchanger sheets 22 are fixedly installed on the outside of the support rod 21 at equal intervals from top to bottom, and the outer side of the annular heat exchanger sheet 22 is 25 cm away from the inner side of the tank body 10. In this embodiment, the distance between two adjacent heat exchanger sheets is 5 cm. In order to facilitate maintenance, a bayonet can be set on the inner or outer side of the heat exchanger sheet so that the heat exchanger sheet can be clamped on the support rod 21 through the bayonet; the lower end of the support rod 21 can also be unfixedly connected to the tank body and freely supported on the bottom of the tank body by gravity.

[0028] The circular ring of the annular heat exchanger tube sheet 22 is not closed, that is, a notch 222 is provided, so that hot water can enter from one end of the heat exchanger tube sheet and flow out from the other end, thereby extending the heat exchange time of hot water in each heat exchanger tube sheet. A water inlet and a water outlet are provided at both ends of each heat exchanger tube sheet. In this embodiment, the annular heat exchanger tube sheet 2 is made of a stainless steel plate with a thickness of 2 mm, and its cross-sectional channel 202 is a rectangle with a width of 5 cm and a height of 20 cm. Each annular heat exchanger tube sheet can accommodate 400L of liquid.

[0029] The inlets and outlets of the seven annular heat exchange tube sheets 22 are connected end to end through a connecting pipe 221 with an outer diameter of 50 mm. That is, the cross-sectional channels 202 of the seven annular heat exchange tube sheets 22 are connected through the connecting pipe 221.

[0030] The heating device 30 includes a heating water tank 31, a circulating pump 32 and an electric heater 33. The electric heater 33 is arranged at the bottom of the heating water tank 31, and the circulating pump 32 is arranged outside the heating water tank 31. The inlet of the circulating pump 32 is connected to the outlet at the bottom of the heating water tank 31, and the outlet of the circulating pump 32 is connected to the water inlet of the lowest heat exchange tube sheet through the water inlet pipe 5, and the water outlet of the highest heat exchange tube sheet is connected to the inlet of the upper part of the heating water tank 31 through the water outlet pipe 6.

[0031] The heat exchange medium in the heating water tank 31 enters the lowermost heat exchange tube sheet through the water inlet pipe 5 via the circulation pump 32, flows upward through each heat exchange tube sheet in turn, and then returns to the heating water tank 31 through the return pipe 6.

[0032] The heat exchange medium can use an aqueous solution mixed with 30% ethylene glycol to prevent the heat exchange medium from freezing due to low temperatures in winter, and the heat exchange medium has a large specific heat capacity, which is conducive to heat exchange. In this embodiment, the volume of the heat exchange medium can be selected as 200L, the model of the circulation pump 32 can be selected as LY-JLM, and the heating power of the electric heater 33 can be selected as 10000W.

[0033] In order to better control the temperature of the additive inside and outside the tank, a first temperature sensor 41 is provided in the heating water tank 31, and the first temperature sensor 41 is interlocked with the electric heater 33. A second temperature sensor 42 is provided in the tank, and the second temperature sensor 42 is interlocked with the circulation pump 32. The first and second temperature sensors can be selected as WZP-PT100 models, and the measurement temperature range is -20℃~+50℃.

[0034] Example 2

[0035] See also Figure 4 The only difference between this embodiment and embodiment 1 is that the heat exchange tube sheets are connected end to end in a spiral shape and wrapped around the support rod.

[0036] When the utility model is used:

[0037] When the outdoor temperature is below zero degrees, the electric heater 33 is turned on one day in advance. When the temperature in the heating water tank 31 reaches the first set temperature, the circulation pump 32 starts automatically; the first set temperature depends on the outdoor temperature and is generally not more than 30°C; when the temperature of the additive inside and outside the tank body 10 reaches the second set temperature, the electric heater 33 and the circulation pump 32 stop working; when the temperature of the additive inside and outside the tank body 10 is 5°C lower than the second set temperature, the electric heater 33 and the circulation pump 32 start automatically to ensure that the temperature of the additive is within a controllable range; the second set temperature depends on the storage capacity in the additive tank and can be set to 5°C, generally not exceeding 20°C.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention, and these improvements and modifications are also within the protection scope of the present invention.

Claims

1. A concrete admixture insulation storage tank, comprising a tank body, characterized in that: A heat exchange device is provided inside the tank body, and a heating device is provided outside the tank body. The heat exchange device includes at least two support rods supported at the bottom of the tank body and a plurality of heat exchange tube sheets fixed on the support rods. When viewed from top to bottom, the plurality of heat exchange tube sheets are in a circular ring shape; each heat exchange tube sheet has a rectangular cross-section channel, and the rectangular cross-section channels of the plurality of heat exchange tube sheets are connected end to end. The heating device includes a heating water tank and a circulating pump. The heating water tank is filled with heat exchange medium, the circulating pump inlet is connected to the heating water tank outlet, the circulating pump outlet is connected to the lowest heat exchange tube sheet through a water inlet pipe, and the uppermost heat exchange tube sheet is connected to the heating water tank inlet through a water outlet pipe.

2. A concrete admixture insulation storage tank according to claim 1, characterized in that: The heat exchange tube sheets are in the shape of a ring with a notch, and are fixed on the support rods in order at equal intervals from top to bottom, and all the heat exchange tube sheets are connected end to end through connecting pipes.

3. A concrete admixture insulation storage tank according to claim 1, characterized in that: The heat exchange tube sheets are connected end to end in a spiral shape and are wound around the support rod.

4. A concrete admixture insulation storage tank according to claim 2 or 3, characterized in that: The distance between two adjacent segments is 5-10 cm, and the outer side of the segment is 10-50 cm away from the inner side of the storage tank.

5. The concrete admixture insulation storage tank according to claim 1, characterized in that: An electric heater is arranged at the bottom of the heating water tank, and a first temperature sensor is arranged inside the heating water tank.

6. A concrete admixture insulation storage tank according to claim 1, characterized in that: A second temperature sensor is arranged in the tank body.

7. The concrete admixture insulation storage tank according to claim 1, characterized in that: The outer wall of the tank body is provided with a heat-insulating layer.

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