A cold water storage tank for cold storage refrigeration system

Abstract

The utility model belongs to the field of low-temperature refrigeration technology, and is particularly a cold water storage tank for a cold storage refrigeration system, including a concrete tank body, a polyurethane rigid foam insulation layer, a polyurea sealing layer and a polyurea enhanced waterproof layer. A heat exchanger is provided on one side of the concrete tank body, and a heat exchange pipe extending to the inside of the concrete tank body is connected to the heat exchanger; a collecting tank is provided on the other side of the concrete tank body, and a water pump is provided on the collecting tank, and a water level regulating component extending to the inside of the concrete tank body is provided on one side of the water pump. The polyurethane rigid foam insulation layer of the utility model is a spray-type polyurethane rigid foam insulation material with Class B flame retardant performance. The spray-coated pure polyurea sealing layer is directly sprayed on the surface of the polyurethane rigid foam to play a role in closing pinholes. The spray-coated polyurea enhanced waterproof layer is a spray-coated polyurea elastomer material with Class B flame retardant performance. It is directly sprayed and fully covered with the sealing layer surface. This structure has the characteristics of heat preservation, waterproofing and anti-corrosion, and can be widely used in cold water storage tanks at the bottom of buildings.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-temperature refrigeration, and in particular relates to a cold water storage tank for a cold storage refrigeration system. Background Art

[0002] At present, food safety and cold chain construction have entered a period of rapid development. As the central link of low-temperature food circulation, cold storage is crucial to all links of the entire cold chain. For large cold storage, the existing technology mainly uses liquid ammonia and Freon as refrigerants for refrigeration. In the existing technology, indirect refrigeration is used to replace liquid ammonia or Freon as refrigerants for direct expansion refrigeration. When using indirect refrigeration, in order to improve the cold storage effect, a cold storage water tank is usually designed according to the demand for cold storage refrigeration capacity;

[0003] Most of the existing cold storage tanks have poor cold storage capacity and are not suitable for large low-temperature cold storages. Therefore, there is an urgent need to design a cold storage tank that can be used in an indirect refrigeration system.

[0004] In order to solve the above problems, the present application proposes a cold water storage tank for a cold storage refrigeration system. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a cold water storage tank for a cold storage refrigeration system, which has the characteristics of strong cold storage capacity and automatic water replenishment.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cold water storage tank for a cold storage refrigeration system, comprising a concrete tank body, wherein the interior of the concrete tank body is provided with a polyurethane rigid foam insulation layer, a polyurea sealing layer and a polyurea reinforced waterproof layer from the inside to the outside, a heat exchanger is provided on one side of the concrete tank body, and a heat exchange pipe extending to the interior of the concrete tank body is connected to the heat exchanger; a collecting tank is provided on the other side of the concrete tank body, a water pump is provided on the collecting tank, and a water level regulating component extending to the interior of the concrete tank body is provided on one side of the water pump.

[0007] As a preferred embodiment of the cold water storage tank for a cold storage refrigeration system of the utility model, the polyurethane rigid foam insulation layer and the inner wall of the concrete tank body are fixed with auxiliary fixing pins.

[0008] As a preferred cold water storage tank for a cold storage refrigeration system of the utility model, the thickness of the polyurethane rigid foam insulation layer is not less than 150 mm, and the polyurea reinforced waterproof layer fully covers the polyurethane rigid foam insulation layer and the polyurea sealing layer.

[0009] As a preferred embodiment of the cold water storage tank for a cold storage refrigeration system of the utility model, the concrete tank body and the collection tank are both provided with overflow holes which are interconnected.

[0010] As a preferred cold water storage tank for a cold storage refrigeration system of the utility model, the input and output ends of the water pump are respectively provided with a water inlet pipe and a water outlet pipe, and the water inlet pipe extends to the bottom of the collection tank.

[0011] As a preferred cold water storage tank for a cold storage refrigeration system of the utility model, the water level regulating assembly includes a protective sleeve vertically fixed to the water outlet pipe, the inner top end of the protective sleeve is provided with a contact switch electrically connected to the water pump, a telescopic rod is inserted into the interior of the protective sleeve, one end of the telescopic rod is provided with a pressure block for squeezing the contact switch, and the other end is provided with a float.

[0012] As a preferred embodiment of the cold water storage tank for a cold storage refrigeration system of the utility model, the contact switch is higher than the liquid level.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The polyurethane rigid foam insulation layer of the utility model is a spray-type polyurethane rigid foam insulation material with B1 grade flame retardant performance. The spray pure polyurea sealing layer is directly sprayed on the surface of the polyurethane rigid foam to seal the pinholes. The spray polyurea enhanced waterproof layer is a spray polyurea elastomer material with B1 grade flame retardant performance. It is directly sprayed and fully covered with the sealing layer surface. This structure has the characteristics of thermal insulation, waterproofing and anti-corrosion, and can be widely used in cold water storage tanks at the bottom of buildings.

[0015] 2. In the utility model, the cold water overflowing from the concrete tank body will enter the collection tank through the overflow hole for temporary storage. When the water level drops, the water level regulating component will control the water pump to start automatically and replenish the cold water in the collection tank into the concrete tank body, thereby achieving the purpose of reusing cold water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is an axonometric drawing of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0020] Figure 4 for Figure 2 A partial enlarged view of point B in the middle.

[0021] In the figure: 1. Concrete tank body; 2. Polyurethane rigid foam insulation layer; 3. Polyurea sealing layer; 4. Polyurea enhanced waterproof layer; 5. Heat exchanger; 6. Heat exchange tube; 7. Collection tank; 8. Water pump; 9. Water level adjustment component; 901. Protective sleeve; 902. Contact switch; 903. Telescopic rod; 904. Pressure block; 905. Float; 10. Fixing needle; 11. Overflow hole; 12. Water inlet pipe; 13. Water outlet pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example 1

[0024] like Figure 1 , Figure 2 and Figure 3 As shown;

[0025] A cold water storage tank for a cold storage refrigeration system comprises a concrete tank body 1. The interior of the concrete tank body 1 is provided with a polyurethane rigid foam insulation layer 2, a polyurea sealing layer 3 and a polyurea enhanced waterproof layer 4 in sequence from the inside to the outside. A heat exchanger 5 is provided on one side of the concrete tank body 1. The heat exchanger 5 is connected with a heat exchange pipe 6 extending to the interior of the concrete tank body 1. A collecting tank 7 is provided on the other side of the concrete tank body 1. A water pump 8 is provided on the collecting tank 7. A water level regulating component 9 extending to the interior of the concrete tank body 1 is provided on one side of the water pump 8. A plurality of fixing pins 10 are used to assist in fixing the polyurethane rigid foam insulation layer 2 to the inner wall of the concrete tank body 1.

[0026] It should be noted that: in this embodiment, the polyurethane rigid foam insulation layer 2 adopts a spray-type polyurethane rigid foam material, has B1 grade flame retardant properties, and is directly sprayed on the concrete surface; the polyurea sealing layer 3 is directly sprayed on the surface of the polyurethane rigid foam to seal pinholes, and has an adhesion force greater than the strength of the rigid foam itself, and the sealing layer itself also has excellent mechanical properties, with a tensile strength of 16 MPa and an elongation of 300%; the polyurea reinforced waterproof layer 4 is sprayed with polyurea elastomer material, has B1 grade flame retardant properties, an oxygen index greater than 32%, and excellent mechanical properties, with a tensile strength of 17 MPa, an elongation at break of 320%, and a tear strength of 80 N / mm.

[0027] It should be noted that: in this embodiment, the polyurethane rigid foam insulation layer 2, the polyurea sealing layer 3 and the polyurea reinforced waterproof layer 4 are all made of solvent-free environmentally friendly materials with a solid content greater than 99%.

[0028] In this embodiment: the polyurethane rigid foam insulation layer 2, the sprayed pure polyurea sealing layer 3 and the sprayed polyurea enhanced waterproof layer 4 accompany each other and have the characteristics of heat preservation, waterproofing and anti-corrosion, and can be widely used in cold water storage tanks at the bottom of buildings.

[0029] In an optional embodiment, the thickness of the polyurethane rigid foam insulation layer 2 is not less than 150 mm, and the polyurea reinforced waterproof layer 4 completely covers the polyurethane rigid foam insulation layer 2 and the polyurea sealing layer 3 .

[0030] In an optional embodiment, the concrete tank body 1 and the collection tank 7 are both provided with overflow holes 11 that are interconnected, and the input and output ends of the water pump 8 are respectively provided with an inlet pipe 12 and an outlet pipe 13, and the inlet pipe 12 extends to the bottom of the collection tank 7.

[0031] In this embodiment: the cold water overflowing from the concrete pool body 1 will enter the collection pool 7 through the overflow hole 11 for temporary storage. When the water level drops, the water level regulating component 9 will control the water pump 8 to start automatically, and the cold water in the collection pool 7 will be replenished into the concrete pool body 1 through the water inlet pipe 12 and the water outlet pipe 13, thereby achieving the purpose of recycling cold water.

[0032] like Figure 4 As shown;

[0033] In an optional embodiment, the water level regulating assembly 9 includes a protective sleeve 901 vertically fixed to the water outlet pipe 13, and a contact switch 902 electrically connected to the water pump 8 is provided at the inner top end of the protective sleeve 901. A telescopic rod 903 is inserted into the interior of the protective sleeve 901, and a pressure block 904 for squeezing the contact switch 902 is provided at one end of the telescopic rod 903, and a float 905 is provided at the other end. The contact switch 902 is higher than the liquid level.

[0034] In this embodiment: when the liquid level increases, the float 905 rises under the action of buoyancy and uses the pressure block 904 to squeeze the contact switch 902. At this time, the contact switch 902 controls the water pump 8 to close, and the excess water will enter the collection tank 7 along the overflow hole 11; when the liquid level drops, the float 905 drops under the action of gravity. At this time, the pressure block 904 leaves the contact switch 902, and the water pump 8 starts. The water pump 8 re-injects the cold water stored in the collection tank 7 into the concrete tank body 1. The water pump 8 and the heat exchanger 5 are electrically connected to the external power supply. The principle of the contact switch 902 controlling the water pump 8 is the existing technology and will not be explained in detail here.

[0035] The working principle and use process of the utility model are as follows: spray polyurethane rigid foam insulation material onto the inner wall of the concrete tank body 1 to form a polyurethane rigid foam insulation layer 2, use a fixing needle 10 to assist in fixing the polyurethane rigid foam insulation layer 2, then spray pure polyurea material onto the polyurethane rigid foam insulation layer 2 to form a polyurea sealing layer 3, and then use a polyurea elastomer material to fully cover the polyurethane rigid foam insulation layer 2 to form a polyurea reinforced waterproof layer 4; inject water into the concrete tank body 1, and the coolant flows along the heat exchange tube 6 inside the concrete tank body 1, thereby achieving The working principle of the water-cooled heat exchanger 5 is the existing technology and will not be described in detail here. When the liquid level increases, the float 905 rises under the action of buoyancy and uses the pressure block 904 to squeeze the contact switch 902. At this time, the contact switch 902 controls the water pump 8 to close, and the excess water will flow into the collection tank 7 through the overflow hole 11. When the liquid level drops, the float 905 drops under the action of gravity. At this time, the pressure block 904 leaves the contact switch 902, and the water pump 8 starts. The water pump 8 re-injects the cold water stored in the collection tank 7 into the concrete tank body 1.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cold water storage tank for a cold storage refrigeration system, comprising a concrete tank body (1), characterized in that: The interior of the concrete tank body (1) is provided with a polyurethane rigid foam insulation layer (2), a polyurea sealing layer (3) and a polyurea enhanced waterproof layer (4) in sequence from the inside to the outside; a heat exchanger (5) is provided on one side of the concrete tank body (1); and the heat exchanger (5) is connected to a heat exchange pipe (6) extending into the interior of the concrete tank body (1); A collecting tank (7) is provided on the other side of the concrete tank body (1), a water pump (8) is provided on the collecting tank (7), and a water level regulating component (9) extending into the interior of the concrete tank body (1) is provided on one side of the water pump (8).

2. The cold water storage tank for cold storage refrigeration system according to claim 1 is characterized in that: A plurality of fixing pins (10) are used to assist in fixing the polyurethane rigid foam insulation layer (2) and the inner wall of the concrete pool body (1).

3. The cold water storage tank for cold storage refrigeration system according to claim 1 is characterized in that: The thickness of the polyurethane rigid foam insulation layer (2) is not less than 150 mm, and the polyurea reinforced waterproof layer (4) completely covers the polyurethane rigid foam insulation layer (2) and the polyurea sealing layer (3).

4. The cold water storage tank for cold storage refrigeration system according to claim 2 is characterized in that: The concrete tank body (1) and the collecting tank (7) are both provided with overflow holes (11) that are interconnected.

5. The cold water storage tank for cold storage refrigeration system according to claim 4 is characterized in that: The input and output ends of the water pump (8) are respectively provided with a water inlet pipe (12) and a water outlet pipe (13), and the water inlet pipe (12) extends to the bottom of the collection tank (7).

6. The cold water storage tank for cold storage refrigeration system according to claim 5, characterized in that: The water level regulating assembly (9) comprises a protective sleeve (901) vertically fixed to the water outlet pipe (13); a contact switch (902) electrically connected to the water pump (8) is provided at the inner top end of the protective sleeve (901); a telescopic rod (903) is inserted into the interior of the protective sleeve (901); a pressing block (904) for pressing the contact switch (902) is provided at one end of the telescopic rod (903); and a floating ball (905) is provided at the other end.

7. The cold water storage tank for a cold storage refrigeration system according to claim 6, characterized in that: The contact switch (902) is higher than the liquid level.

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