Sealing structure of phase change energy storage unit

Abstract

The utility model relates to a sealing structure of a phase change energy storage unit, which comprises a sealing cylinder with an upper opening and a sealing cover arranged at the top of the sealing cylinder, and is characterized in that the sealing cover comprises a supporting ring, a sealing film layer arranged on the inner side of the supporting ring, a sealing ring arranged on the periphery of the supporting ring and a connecting frame arranged on the upper surface of the supporting ring, a pair of guide rods are symmetrically arranged on the two sides of the connecting frame, horizontal threaded sleeves are arranged at the lower ends of the guide rods, longitudinal guide grooves corresponding to the horizontal threaded sleeves are formed in the peripheral wall of the sealing cylinder, the ends of the horizontal threaded sleeves are inserted into the longitudinal guide grooves, and the tip ends of positioning screws are screwed into the horizontal threaded sleeves, penetrate through the horizontal threaded sleeves and abut against the bottoms of the longitudinal guide grooves. The outer circumferential face of the sealing ring is tightly attached to the inner circumferential wall of the sealing cylinder. The sealing structure guarantees long-term sealing performance and is high in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of phase change energy storage, and particularly relates to a sealing structure of a phase change energy storage unit. Background Art

[0002] Phase change energy storage technology is often used to improve energy utilization efficiency. The phase change energy storage technology utilizes phase change materials to achieve the phase change process, which includes the process of hydrated salts losing crystal water during heating and the process of inorganic salts combining with water to regenerate hydrated salts during cooling. In order to prevent the decline of heat storage performance caused by water loss, a sealing structure needs to be set outside the phase change materials.

[0003] For example, CN 218916048 U discloses a sealing structure of a phase change energy storage unit, which includes a sealed tank. One side of the outer wall of the top end of the sealed tank is provided with a charging port, and one side of the outer wall of the bottom end of the sealed tank is provided with a discharging port. The inner side walls of the charging port and the discharging port are both provided with sealing covers. The outer side wall of the sealing cover is fixedly connected with a handle. A push rod is arranged inside the sealed tank. The bottom end of the push rod is fixedly connected with a sealing layer, and the bottom end of the sealing layer is fixedly connected with an anti-corrosion layer. The purpose of this sealing structure is to realize the sealing treatment of the phase change materials and improve the sealing performance through the mutual cooperation between components by setting the push rod, the sealing layer and the anti-corrosion layer. However, there are still the following problems in the use process: affected by the ambient temperature, the phase change materials have frequent volume changes, so the sealing layer moves up and down accordingly. After long-term use, it is easy to wear with the sealed tank, affecting the sealing performance and reducing the reliability. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sealing structure of a phase change energy storage unit with reasonable structure and reliable use to solve the above problems, ensuring long-term sealing performance and high reliability.

[0005] The technical solution of the utility model is as follows:

[0006] A sealing structure of a phase change energy storage unit includes an upper-opening sealing cylinder and a sealing cover arranged on the top of the sealing cylinder. The technical key points are as follows: the sealing cover includes a support ring, a sealing film layer arranged inside the support ring, a sealing ring arranged on the outer periphery of the support ring, and a connecting frame arranged on the upper surface of the support ring. A pair of guide rods are symmetrically arranged on both sides of the connecting frame. A horizontal screw sleeve is arranged at the lower end of the guide rod. A longitudinal guide groove corresponding to the horizontal screw sleeve is arranged on the outer peripheral wall of the sealing cylinder. The end of the horizontal screw sleeve is inserted into the longitudinal guide groove. The tip of the positioning screw is screwed into the horizontal screw sleeve and passes through the horizontal screw sleeve to tightly press against the bottom of the longitudinal guide groove. The outer peripheral surface of the sealing ring is closely attached to the inner peripheral wall of the sealing cylinder.

[0007] For the above-mentioned sealing structure of the phase change energy storage unit, a circular convex ring is provided at the lower part of the inner peripheral wall of the support ring. A lower sealing ring is laid on the upper surface of the circular convex ring. The edge of the sealing film layer is laid on the upper surface of the lower sealing ring, and an upper sealing ring is laid on the upper surface of the edge of the sealing film layer. An annular pressing plate is provided on the upper surface of the upper sealing ring, and a plurality of fasteners are evenly provided above the annular pressing plate.

[0008] For the above-mentioned sealing structure of the phase change energy storage unit, a circular groove is provided on the outer peripheral wall of the support ring, and a circular protrusion matching with the circular groove is provided on the inner peripheral surface of the sealing ring.

[0009] For the above-mentioned sealing structure of the phase change energy storage unit, an anti-corrosion coating is provided on the lower surfaces of the sealing ring, the support ring and the sealing film layer.

[0010] For the above-mentioned sealing structure of the phase change energy storage unit, the connecting frame includes a plurality of connecting columns uniformly fixed on the upper surface of the support ring and a connecting ring provided at the upper ends of the respective connecting columns. The upper end of the guide rod is fixedly connected to the connecting ring.

[0011] For the above-mentioned sealing structure of the phase change energy storage unit, a feeding port is provided at the upper part of the outer peripheral wall of the sealing cylinder. The inner bottom surface of the sealing cylinder is an inclined surface, and a discharge port is provided on the outer peripheral wall of the sealing cylinder corresponding to the lower end of the inclined surface. Sealing covers are provided for both the feeding port and the discharge port.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The upper sealing of the sealing cylinder is realized by using a sealing cover. After injecting the phase change material, press down the sealing cover. When it contacts the phase change material and the sealing film layer is tightened and bulged, it indicates that the sealing cover reaches the sealing position, and then the positioning screw can be screwed. On the one hand, the sealing ring is in close fit with the sealing cylinder without leakage. On the other hand, when the volume of the phase change material changes, the flexibility of the sealing film layer can compensate for the volume change, and the sealing ring does not need to move up and down, avoiding abrasion with the sealing cylinder, thereby ensuring long-term sealing performance and high reliability. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic diagram of the present utility model in use in a sealed state;

[0016] Figure 3 is Figure 1 the enlarged view of part A in

[0017] In the figure: 1. Guide rod, 2. Connecting ring, 3. Connecting column, 4. Annular pressing plate, 5. Sealing film layer, 6. Positioning screw, 7. Horizontal screw sleeve, 8. Longitudinal guide groove, 9. Sealing cylinder, 10. Inclined surface, 11. Plugging cover, 12. Discharge port, 13. Feeding port, 14. Support ring, 15. Sealing ring, 16. Upper sealing ring, 17. Lower sealing ring. Detailed implementation mode

[0018] The present utility model will be described in detail according to the accompanying drawings of the specification.

[0019] As Figures 1 to 3 shown, the sealing structure of the phase change energy storage unit includes a sealing cylinder 9 with an upper opening and a sealing cover arranged at the top of the sealing cylinder 9.

[0020] Among them, the sealing cover includes a support ring 14, a sealing film layer 5 arranged inside the support ring 14, a sealing ring 15 arranged on the outer periphery of the support ring 14, and a connecting frame arranged on the upper surface of the support ring 14. A pair of guide rods 1 are symmetrically arranged on both sides of the connecting frame, and a horizontal screw sleeve 7 is arranged at the lower end of the guide rod 1. A longitudinal guide groove 8 corresponding to the horizontal screw sleeve 7 is arranged on the outer peripheral wall of the sealing cylinder 9, and the end of the horizontal screw sleeve 7 is inserted into the longitudinal guide groove 8. The tip of the positioning screw 6 is screwed into the horizontal screw sleeve 7 and passes through the horizontal screw sleeve 7 to tightly press against the bottom of the longitudinal guide groove 8. The outer peripheral surface of the sealing ring 15 is closely attached to the inner peripheral wall of the sealing cylinder 9.

[0021] In this embodiment, a circular convex ring is arranged at the lower part of the inner peripheral wall of the support ring 14, a lower sealing ring 17 is laid on the upper surface of the circular convex ring, the edge of the sealing film layer 5 is laid on the upper surface of the lower sealing ring 17, an upper sealing ring 16 is laid on the upper surface of the edge of the sealing film layer 5, an annular pressing plate 4 is arranged on the upper surface of the upper sealing ring 16, and a plurality of fasteners are evenly arranged above the annular pressing plate 4. An annular groove is arranged on the outer peripheral wall of the support ring 14, and an annular protrusion matched with the annular groove is arranged on the inner peripheral surface of the sealing ring 15. The connecting frame includes 4 connecting columns 3 evenly fixed on the upper surface of the support ring 14 and a connecting ring 2 arranged at the upper end of each connecting column 3, and the upper end of the guide rod 1 is fixedly connected with the connecting ring 2. A feeding port 13 is arranged on the upper part of the outer peripheral wall of the sealing cylinder 9, the inner bottom surface of the sealing cylinder 9 is an inclined surface 10, a discharge port 12 is arranged on the outer peripheral wall of the sealing cylinder 9 corresponding to the low position end of the inclined surface 10, and plugging covers 11 are arranged on both the feeding port 13 and the discharge port 12. Anticorrosion coatings are arranged on the lower surfaces of the sealing ring 15, the support ring 14 and the sealing film layer 5.

[0022] Working principle:

[0023] First, lift the sealing cover so that the charging port 13 is vertically below the sealing cover. Inject the phase change material into the sealing cylinder 9 through the charging port 13. After the injection is completed, push down the sealing cover until it contacts the phase change material. When the sealing film layer 5 is tightened and bulged, it indicates that the sealing cover has reached the sealing position. Then, screw two positioning screws 6 so that the tips of the positioning screws 6 are tightly pressed against the sealing cylinder 9 to achieve positioning. At this time, the purpose of sealing the phase change material is achieved.

[0024] The above has described the embodiments of the present invention in detail, but the above content is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope covered by this patent.

Claims

1. A sealing structure of a phase change energy storage unit, comprising a sealing cylinder with an upper opening and a sealing cover arranged on the top of the sealing cylinder, characterized in that: The sealing cover includes a support ring, a sealing film layer arranged on the inner side of the support ring, a sealing ring arranged on the outer periphery of the support ring, and a connecting frame arranged on the upper surface of the support ring. A pair of guide rods are symmetrically arranged on both sides of the connecting frame. A horizontal screw sleeve is arranged at the lower end of the guide rod. A longitudinal guide groove corresponding to the horizontal screw sleeve is arranged on the outer peripheral wall of the sealing cylinder. The end of the horizontal screw sleeve is inserted into the longitudinal guide groove. The tip of the positioning screw is screwed into the horizontal screw sleeve and passes through the horizontal screw sleeve to be tightened to the bottom of the longitudinal guide groove. The outer peripheral surface of the sealing ring is tightly fitted with the inner peripheral wall of the sealing cylinder.

2. The sealing structure of the phase change energy storage unit according to claim 1, characterized in that: An annular convex ring is provided at the lower part of the inner circumferential wall of the support ring, a lower sealing ring is laid on the upper surface of the annular convex ring, the edge of the sealing film layer is laid on the upper surface of the lower sealing ring, an upper sealing ring is laid on the upper surface of the edge of the sealing film layer, an annular pressure plate is provided on the upper surface of the upper sealing ring, and a plurality of fasteners are evenly arranged above the annular pressure plate.

3. The sealing structure of the phase change energy storage unit according to claim 1, characterized in that: An annular groove is arranged on the outer peripheral wall of the support ring, and an annular protrusion matching with the annular groove is arranged on the inner peripheral surface of the sealing ring.

4. The sealing structure of the phase change energy storage unit according to claim 1, characterized in that: The lower surfaces of the sealing ring, the supporting ring and the sealing film layer are all provided with an anti-corrosion coating.

5. The sealing structure of the phase change energy storage unit according to claim 1, characterized in that: The connecting frame comprises a plurality of connecting columns evenly fixed on the upper surface of the supporting ring, and a connecting ring arranged on the upper end of each connecting column, and the upper end of the guide rod is fixedly connected to the connecting ring.

6. The sealing structure of the phase change energy storage unit according to claim 1, characterized in that: The upper part of the outer peripheral wall of the sealing cylinder is provided with a material injection port, the inner bottom surface of the sealing cylinder is an inclined surface, and the lower end of the outer peripheral wall of the sealing cylinder corresponding to the inclined surface is provided with a material discharge port, and the material injection port and the material discharge port are both provided with a blocking cover.

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