Cold-bridge-proof heat-insulating ice-storage tank

Abstract

This utility model discloses a cold bridge-prevention and heat-insulating ice storage tank. The cold bridge-prevention and heat-insulating ice storage tank includes a tank body, with an insulation layer and a reinforced waterproof layer sequentially disposed on the inner side of the tank body. Its key feature is that it also includes a cold bridge-prevention fastening structure. The cold bridge-prevention fastening structure passes through the reinforced waterproof layer and the insulation layer and is fixed to the tank body. The cold bridge-prevention fastening structure includes a heat-insulating composite bolt. The heat-insulating composite bolt includes a base screw, a heat-insulating connector, and a main bolt connected in sequence. This utility model uses a heat-insulating connector to separate the base screw from the main bolt and arranges the heat-insulating connector within the insulation layer, preventing the formation of a complete metal cold bridge between the chilled water and the tank wall, thereby significantly reducing the loss of chilled water. Simultaneously, the heat-insulating gasket and the heat-insulating coating on the limiting part of the main bolt in this utility model also reduce the heat transfer coefficient from the chilled water to the tank body, further reducing the loss of chilled water.

Description

Technical Field

[0001] This utility model belongs to the technical field of ice storage equipment, specifically relating to an anti-cold bridge insulated ice storage tank. Background Technology

[0002] In the field of cold storage technology, concrete ice storage tanks are an important component of low-temperature phase change cold storage systems, and their insulation performance directly affects the efficiency of cold storage. Traditional ice storage tanks typically employ a layered structure design, with a rigid closed-cell polyurethane foam insulation layer laid on the inner wall of the concrete tank, and a steel plate installed inside the insulation layer to improve waterproofing and structural stability. To achieve reliable fixation of the multi-layered structure, conventional technical solutions often use through-type connections with metal fasteners, that is, mechanically anchoring the steel plate, insulation layer, and concrete substrate with metal bolts.

[0003] Existing technologies suffer from significant thermal defects: metal fasteners penetrate the insulation layer, forming continuous heat conduction channels and creating cold bridges between the low-temperature environment inside the ice storage tank and the external environment. This results in the continuous loss of cooling capacity from the chilled water inside the tank through the fasteners to the concrete tank body. Current technological improvements mainly focus on optimizing the performance of insulation materials, but there is a lack of effective solutions to the cold bridging effect caused by through-type fasteners. Summary of the Invention

[0004] The purpose of this utility model is to provide a cold bridge-proof, heat-insulating ice storage tank.

[0005] This utility model provides a cold bridge prevention and insulation ice storage tank, which includes a tank body, an insulation layer and a reinforced waterproof layer sequentially disposed on the inner side of the tank body. Its key feature is that it also includes a cold bridge prevention and fastening structure. The cold bridge prevention and fastening structure passes through the reinforced waterproof layer and the insulation layer and is fixed to the tank body. The cold bridge prevention and fastening structure includes a thermal insulation composite bolt. The thermal insulation composite bolt includes a base screw, a thermal insulation connector, and a main bolt connected in sequence. The base screw and the main bolt are respectively fixed to both ends of the thermal insulation connector. The thermal insulation connector is located within the insulation layer.

[0006] Preferably, the outer end of the base screw is pointed.

[0007] Preferably, the end of the heat-insulating connector facing the base screw has a tapered guide surface.

[0008] Preferably, the anti-cold bridge fastening structure further includes a heat-insulating gasket. A limiting portion is provided at the end of the main bolt facing away from the heat-insulating connector. The heat-insulating gasket is disposed between the limiting portion of the main bolt and the reinforced waterproof layer.

[0009] Preferably, the limiting portion is provided with a heat-insulating coating.

[0010] Preferably, the portion of the base screw located outside the heat-insulating connector has self-tapping threads.

[0011] Preferably, the thermal insulation connector has mounting holes at both ends. The opposite ends of the base screw and the main bolt are fixed to the mounting holes at both ends of the thermal insulation connector.

[0012] Preferably, the inner wall of the tank has a blind hole at the fastening position. The anti-cold bridge fastening structure also includes an expansion sleeve. The expansion sleeve is disposed in the blind hole of the tank. The base thread of the thermal insulation composite bolt is fixed to the blind hole on the tank by the expansion sleeve.

[0013] Preferably, the reinforced waterproof layer is a steel plate covering the inside of the waterproof base layer.

[0014] Preferably, the insulation layer includes a moisture-proof coating, an insulation main layer, an interface layer, a sealing layer, and a waterproof base layer arranged sequentially along the direction away from the tank wall.

[0015] The present invention has the following beneficial effects.

[0016] 1. This utility model uses a heat-insulating connector to separate the base screw from the main bolt, and arranges the heat-insulating connector within the insulation layer, preventing the formation of a complete metal cold bridge between the chilled water and the tank wall, thereby significantly reducing the loss of chilled water cooling capacity. Simultaneously, the heat-insulating gasket and the heat-insulating coating on the main bolt limiting portion of this utility model also reduce the heat transfer coefficient from the chilled water to the tank, further minimizing the loss of chilled water cooling capacity.

[0017] 2. This utility model provides a beveled surface at the outer end of the base screw, forming a sharp structure at the outer end of the base screw, and provides a tapered guide surface at the end of the heat insulation connector facing the base screw, which effectively reduces the resistance when the anti-cold bridge fastening structure is inserted into the insulation layer, and improves the convenience and efficiency of the anti-cold bridge fastening structure installation. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram showing the arrangement of the tank, insulation layer, and reinforced waterproof layer in an embodiment of this utility model. Figure 1 (A magnified view of part A in the middle).

[0020] Figure 3 This is a schematic diagram of the installation of the anti-cold bridge fastening structure in the embodiment of this utility model. Figure 2 (A magnified view of part B in the middle section).

[0021] Reference numerals: 1. Tank body; 2. Insulation layer; 3. Reinforced waterproof layer; 4. Thermal insulation composite bolt; 4-1. Base bolt; 4-2. Thermal insulation connector; 4-3. Main bolt; 4-3-1. Limiting part; 5. Thermal insulation gasket. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1 and Figure 2 As shown, a cold-bridge-resistant, insulated ice storage tank includes a tank body 1, an insulation layer 2, a reinforced waterproof layer 3, and a cold-bridge-resistant fastening structure. The insulation layer 2 covers the inner wall of the tank body 1 (including the inner sidewall, the top surface of the inner cavity, and the bottom surface of the inner cavity). The reinforced waterproof layer 3 covers the inner side of the insulation layer 2 (and the side facing away from the wall of the tank body 1). The cold-bridge-resistant fastening structure is used to fix the reinforced waterproof layer 3 and the insulation layer 2 to the inner side of the tank body 1, and to prevent the formation of metal cold bridges between the inner cavity of the ice storage tank and the tank body 1, thereby reducing the loss of cold stored in the ice storage tank. The tank body 1 is a rectangular tank structure made of concrete.

[0024] The insulation layer 2 comprises a moisture-proof coating, an insulation main layer, an interface layer, a sealing layer, and a waterproof base layer, sequentially stacked along the direction away from the wall of the tank 1. The insulation main layer is made of rigid closed-cell polyurethane foam. The interface layer uses putty to repair the surface of the insulation main layer. The waterproof base layer uses a polyurea coating. The reinforced waterproof layer 3 is made of steel plate and is attached to the waterproof base layer.

[0025] The inner wall of the tank 1 is provided with multiple fastening positions. Each fastening position is equipped with an anti-cold bridge fastening structure. The anti-cold bridge fastening structure passes through the reinforced waterproof layer 3 and the thermal insulation layer 2, and is fixed to the tank 1.

[0026] like Figure 3 As shown, the anti-cold bridge fastening structure includes a thermally insulated composite bolt 4 and a thermally insulated gasket 5. The thermally insulated composite bolt 4 has a split structure, including a base screw 4-1, a thermally insulated connector 4-2, and a main bolt 4-3 connected in sequence. The thermally insulated connector 4-2 is in the shape of a rotating body, with non-communicating mounting holes at both ends. The opposite ends of the base screw 4-1 and the main bolt 4-3 are fixed to the mounting holes at both ends of the thermally insulated connector 4-2. The thermally insulated connector 4-2 is made of an organic polymer material with good thermal insulation properties. The end of the main bolt 4-3 facing away from the thermally insulated connector 4-2 is provided with a limiting part 4-3-1 (i.e., the head structure of the bolt).

[0027] The base screw 4-1 extends into and is fixed within the groove 1. The thermal insulation connector 4-2 is located within the main thermal insulation layer of the insulation layer 2. The main bolt 4-3 passes through the reinforced waterproof layer 3. The thermal insulation gasket 5 is disposed between the limiting portion 4-3-1 of the main bolt 4-3 and the reinforced waterproof layer 3. A thermal insulation coating is provided on the limiting portion 4-3-1. The thermal insulation coating is formed by spraying waterproof polyurethane foam onto the limiting portion 4-3-1.

[0028] The outer end of the base screw 4-1 (i.e., the end facing away from the thermal insulation connector 4-2) has a beveled surface, forming a sharp structure. The end of the thermal insulation connector 4-2 facing the base screw 4-1 has a tapered guide surface (specifically a frustum). The sharp structure at the outer end of the base screw 4-1 and the tapered guide surface at the end of the thermal insulation connector 4-2 both reduce the resistance when the anti-cold bridge fastening structure is inserted into the insulation layer 2. The base screw 4-1 is inserted into the inner wall of the groove 1 and fixed.

[0029] In this embodiment, the base screw 4-1, the main bolt 4-3, and the thermal insulation connector 4-2 are all fixedly connected by trapezoidal threads. In other embodiments, the base screw 4-1, the main bolt 4-3, and the thermal insulation connector 4-2 can also be fixedly connected by adhesive bonding or other reliable methods.

[0030] In some embodiments, the base screw 4-1 is provided with self-tapping threads, which can be drilled into the groove 1 and fixed by applying pressure and rotating it. The reinforced waterproof layer 3 is provided with through holes for the heat-insulating composite bolts 4 to pass through at each fastening position.

[0031] In some other embodiments, the inner wall of the groove 1 is provided with a blind hole at the fastening position. The anti-cold bridge fastening structure also includes an expansion sleeve. The expansion sleeve is installed in the blind hole of the groove 1. The base screw 4-1 of the thermal insulation composite bolt 4 is connected to the expansion sleeve. The expansion sleeve expands outward and presses against the side wall of the blind hole, so that the base screw 4-1 is fixed together with the groove 1. The insulation layer 2 can be pre-drilled at the fastening position, or a through hole can be formed on the insulation layer 2 by inserting the anti-cold bridge fastening structure.

[0032] In some embodiments, the heat insulation gasket 5 may be made of polytetrafluoroethylene (PTFE) elastomer, which is both heat-insulating and elastic, and can fill the gap between the limiting part 4-3-1 of the main bolt 4-3 and the steel plate. The main bolt 4-3 passes through the central hole of the heat insulation gasket 5.

[0033] In some embodiments, the insulation layer 2 further includes a polyurea primer and a polyurea waterproof layer on the inner wall and bottom surface of the inner cavity of the tank 1.

[0034] The working principle of this embodiment is as follows:

[0035] Chilled water and a cold storage coil structure are installed in an anti-cold bridge insulated ice storage tank. The cold storage coil structure supplies and releases cold water, causing the chilled water to freeze or thaw.

[0036] Due to the presence of the heat-insulating connector 4-2, a complete metal cold bridge cannot be formed between the chilled water and the wall of the tank 1, thereby greatly reducing the loss of chilled water. At the same time, the heat-insulating coating on the heat-insulating gasket 5 and the limiting part 4-3-1 of the main bolt 4-3 can also reduce the heat transfer coefficient from the chilled water to the tank 1, thus reducing the loss of chilled water.

Claims

1. A cold bridge-prevention, heat-insulating ice storage tank, comprising a tank body (1), an insulation layer (2) and a reinforced waterproof layer (3) sequentially disposed on the inner side of the tank body (1); characterized in that: It also includes a cold bridge fastening structure; the cold bridge fastening structure passes through the reinforced waterproof layer (3) and the insulation layer (2) and is fixed to the tank (1); the cold bridge fastening structure includes a heat-insulating composite bolt (4); the heat-insulating composite bolt (4) includes a base screw (4-1), a heat-insulating connector (4-2) and a main bolt (4-3) connected in sequence; the base screw (4-1) and the main bolt (4-3) are respectively fixed at both ends of the heat-insulating connector (4-2); the heat-insulating connector (4-2) is located inside the insulation layer (2).

2. The cold-bridge preventing thermal storage ice tank according to claim 1, characterized in that: The outer end of the base screw (4-1) is pointed.

3. The cold-bridge preventing thermal storage ice tank according to claim 1, characterized in that: The end of the heat-insulating connector (4-2) facing the base screw (4-1) is provided with a tapered guide surface.

4. The cold-bridge preventing thermal storage ice tank according to claim 1, characterized in that: The anti-cold bridge fastening structure also includes a heat insulation gasket (5); the main bolt (4-3) is provided with a limiting part at one end away from the heat insulation connector (4-2); the heat insulation gasket (5) is disposed between the limiting part (4-3-1) of the main bolt (4-3) and the reinforced waterproof layer (3).

5. The cold-bridge preventing thermal storage ice tank according to claim 4, characterized in that: The limiting part (4-3-1) is provided with a heat insulation coating.

6. The cold-bridge preventing thermal storage ice tank according to claim 1, characterized in that: The portion of the base screw (4-1) other than the heat insulation connector (4-2) is provided with self-tapping threads.

7. The cold-bridge preventing thermal storage ice tank according to claim 1, characterized in that: The heat insulation connector (4-2) has mounting holes at both ends; the opposite ends of the base screw (4-1) and the main bolt (4-3) are respectively fixed to the mounting holes at both ends of the heat insulation connector (4-2).

8. The cold-bridge preventing thermal storage ice tank according to claim 1, characterized in that: The inner wall of the groove (1) is provided with a blind hole at the fastening position; the anti-cold bridge fastening structure also includes an expansion sleeve; the expansion sleeve is set in the blind hole of the groove (1); the base screw (4-1) of the heat insulation composite bolt (4) is fixed to the blind hole on the groove (1) by the expansion sleeve.

9. The cold-bridge preventing, heat-insulating, and ice-storing tank according to claim 1, characterized in that: The reinforced waterproof layer (3) is a steel plate covering the inside of the waterproof base layer.

10. The cold-bridge preventing thermal storage ice tank according to claim 1, characterized in that: The insulation layer (2) includes a moisture-proof coating, an insulation main layer, an interface layer, a sealing layer and a waterproof base layer arranged sequentially along the direction away from the wall of the tank (1).

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