A phase change panel sealing structure

Abstract

The utility model relates to the technical field of phase change energy storage, specifically relates to a kind of phase change plate sealing structure, it includes phase change plate, is equipped with containing chamber and with containing chamber intercommunication's perfusion hole;First sealing element, be in perfusion hole, for sealing containing chamber;Second sealing element, fixedly arranged in perfusion hole, and located the side of first sealing element away from containing chamber;Wherein, first sealing element and second sealing element form gap cavity between the inner wall of perfusion hole, the medium overflow of the double sealing mechanism of the application can be prevented, to significantly improve overall sealing reliability, effectively solve the technical problem that existing sealing structure is easy to fail under high pressure working condition, guarantee phase change plate long-term stable operation, prolong its service life and reduce the influence risk to surrounding environment and equipment.

Description

Technical Field

[0001] This utility model relates to the field of phase change energy storage technology, and in particular to a phase change plate sealing structure. Background Technology

[0002] In the field of phase change plate (PCP) technology, PCPs, with their unique phase change energy storage characteristics, have demonstrated great potential in numerous engineering applications and are widely used in key areas such as temperature control, energy storage, and release. However, in practical applications, after the PCP is injected with a phase change medium to achieve its function, the injection hole is sealed, creating a sealed chamber. During operation, the internal pressure of the PCP increases due to physical processes such as the phase change of the medium. Existing sealing methods struggle to maintain a good seal under this increased pressure, leading to leakage. This leakage not only causes the loss of the phase change medium, affecting the energy storage performance and lifespan of the PCP, but may also adversely affect the surrounding environment and equipment. Utility Model Content

[0003] The purpose of this invention is to provide a phase change plate sealing structure to solve the problem of leakage caused by poor sealing performance of phase change plates in the prior art.

[0004] The technical solution of this utility model is: a phase change plate sealing structure, comprising: The phase change plate is provided with a receiving chamber and an injection hole communicating with the receiving chamber; A first sealing element is disposed within the injection hole to seal the receiving chamber; The second seal is fixed inside the injection hole and located on the side of the first seal away from the receiving chamber; The first seal and the second seal form a gap cavity between the inner wall of the injection hole.

[0005] Preferably, the injection hole includes a first hole segment and a second hole segment that are connected to each other, the diameter of the first hole segment is smaller than the diameter of the second hole segment, and the first seal is threadedly connected to the second hole segment.

[0006] Preferably, a transition section is provided between the first hole segment and the second hole segment, and the diameter of the transition section gradually increases from the first hole segment to the second hole segment. The end edge of the first seal is provided with a first arc sealing surface, and the first arc sealing surface abuts against the inner wall of the transition section to achieve a seal.

[0007] Preferably, the first sealing element includes an upper sealing section and a lower sealing section, the diameter of the lower sealing section is smaller than the diameter of the upper sealing section, and the lower sealing section forms an annular gap with the inner wall of the second hole section.

[0008] Preferably, the upper sealing section and the second hole section are connected by thread sealant to form a sealed connection. Preferably, the injection hole has a third hole section communicating with the second hole section, the diameter of the third hole section is larger than the diameter of the second hole section, and the second sealing element is fixed in the third hole section.

[0009] Preferably, the third hole segment has a clearance hole segment at the end away from the second hole segment, and the diameter of the clearance hole segment gradually increases in the direction away from the third hole segment.

[0010] Preferably, the second seal has a second arc-shaped sealing surface at the edge of its end face facing the first seal.

[0011] Compared with the prior art, the advantages of this utility model are: When the pressure inside the chamber increases due to the physical changes of the phase change medium, the gap cavity can act as a pressure buffer area, effectively dispersing and weakening the direct impact of high pressure on the first seal, preventing it from failing prematurely due to stress concentration. At the same time, the second seal acts as a secondary protective barrier. Even if the first seal leaks slightly under high pressure, it can still prevent the medium from overflowing through the double sealing mechanism, thereby significantly improving the overall sealing reliability. This effectively solves the technical problem of existing sealing structures being prone to failure under high pressure conditions, ensuring the long-term stable operation of the phase change plate, extending its service life, and reducing the risk of impact on the surrounding environment and equipment. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the phase change plate sealing structure described in this utility model; Figure 2 This is a cross-sectional view of a phase change plate sealing structure according to the present invention. Figure 3 This is a cross-sectional view of the injection hole described in this utility model; Figure 4 This is a cross-sectional view of the first and second sealing elements of this utility model within the injection hole. Figure 5 This is a schematic diagram of the first sealing element described in this utility model; Figure 6 This is a schematic diagram of the second sealing element described in this utility model.

[0013] Explanation of reference numerals in the attached figures: 1. Phase change plate; 11. Injection hole; 111. First hole section; 112. Second hole section; 113. Third hole section; 114. Transition hole section; 115. Relief hole section; 12. Receiving chamber; 13. Gap cavity; 2. First seal; 21. Upper sealing section; 22. Lower sealing section; 23. First arc sealing surface; 3. Second seal; 31. Second arc sealing surface. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] like Figure 1 and Figure 2 As shown, a phase change plate sealing structure includes a phase change plate 1, a first sealing element 2, and a second sealing element 3. The phase change plate 1 has a receiving chamber 12 and an injection hole 11 communicating with the receiving chamber 12. The injection hole 11 is used to safely encapsulate a solid, liquid, or solid-liquid mixture of phase change materials inside the phase change plate 1. The first sealing element 2 and the second sealing element 3 are both disposed within the injection hole 11. The second sealing element 3 is located on the side of the first sealing element 2 away from the receiving chamber 12. A gap cavity 13 is formed between the first sealing element 2 and the second sealing element 3 on the inner wall of the injection hole 11.

[0018] The first seal 2, as the primary seal, bears the most significant sealing pressure and directly faces the dynamically changing pressure within the containment chamber 12. The second seal 3, as a secondary or safety seal, forms a second line of defense, transforming a single point of seal failure into two independent sealing points, significantly reducing the probability of overall seal failure. The gap cavity 13, acting as an elastic buffer layer, effectively absorbs the pressure generated by the volume expansion of the phase change material within the chamber. When the first seal 2 experiences minor leakage due to long-term thermal cycling or material fatigue, the second seal 3 can immediately form a secondary sealing barrier, significantly improving the fault tolerance of the sealing system.

[0019] like Figure 3 and Figure 4 As shown, the injection hole 11 is a through hole connecting the outside to the receiving chamber 12. The injection hole 11 includes a first hole section 111 and a second hole section 112 that are connected. The inner wall of the second hole section 112 is provided with internal threads, and the first sealing member 2 is provided with external threads. The first sealing member 2 is threadedly connected to the second hole section 112. A pre-tightening force is generated between the second hole section 112 and the first sealing member 2. By tightening the first sealing member 2, it is tightly engaged with the thread surface of the second hole section 112, generating huge radial pressure and axial clamping force. This can effectively resist the periodic high pressure generated inside the phase change plate 1 due to the phase change of the working fluid, and prevent the sealing member from being pushed out by the pressure or forming a leakage channel. The diameter of the first hole section 111 is smaller than the diameter of the second hole section 112. The end of the second hole section 112 forms a stop end face that abuts against the first sealing member 2 to prevent the first sealing member 2 from being over-screwed.

[0020] A transition section 114 is provided between the first hole section 111 and the second hole section 112. The diameter of the transition section 114 gradually increases from the first hole section 111 to the second hole section 112. Preferably, the transition section 114 is a conical hole section. The end edge of the first seal 2 is provided with a first arc-shaped sealing surface 23. When the first seal 2 and the second hole section 112 are screwed together, the first arc-shaped sealing surface 23 abuts against the inner wall of the transition section 114 to achieve a seal. Specifically, the first arc-shaped sealing surface 23 and the transition section 114 form a continuous, extremely narrow annular contact line. Under the same tightening torque, a huge contact stress is generated on the sealing line, forcing the arc surface of the first seal 2 to press more tightly against the inner wall of the conical transition section 114. This greatly reduces the dependence of the seal on the thread preload and provides additional safety redundancy.

[0021] like Figure 5As shown, the first seal 2 includes an upper sealing section 21 and a lower sealing section 22. The diameter of the lower sealing section 22 is smaller than that of the upper sealing section 21. The lower sealing section 22 forms an annular gap with the inner wall of the second hole section 112. A first arc-shaped sealing surface 23 is formed at the end edge of the lower sealing section 22 away from the upper sealing section 21. The annular gap completely eliminates friction other than that of the threads, allowing the first seal 2 to be smoothly screwed into place. The operator can obtain clear torque feedback, making it easier to judge when it is fully tightened, greatly improving assembly efficiency and experience.

[0022] Preferably, the upper sealing section 21 and the second hole section 112 are connected by thread sealant. The cured thread sealant can firmly lock the thread pair, effectively resist vibration and impact, prevent the first seal 2 from loosening, and thus maintain the initial preload and sealing effect for a long time.

[0023] like Figures 3 to 6 As shown, the injection hole 11 has a third hole section 113 communicating with the second hole section 112. The diameter of the third hole section 113 is larger than that of the second hole section 112. The second hole section 112 and the third hole section 113 form a stepped structure, providing a precise mechanical stop for the pressing of the second seal 3. The gap cavity 13 is formed within the second hole section 112. The first hole section 111, the second hole section 112, and the third hole section 113 are coaxially arranged. The second seal 3 is fixed within the third hole section 113, and the end face of the second seal 3 abuts against the bottom end face of the third hole section 113. The second seal 3 constitutes the main sealing interface of the second seal. Preferably, the second seal 3 is interference-fitted within the third hole section 113, thereby generating a large frictional force, which allows the second seal 3 to be firmly fixed within the third hole section 113, giving it the ability to resist vibration, impact, and internal pressure impact, reducing the risk of the second seal 3 loosening or falling off. The second sealing element 3 has a second arc sealing surface 31 on the edge of its end face facing the first sealing element 2.

[0024] The third hole section 113 has a clearance hole section 115 at the end away from the second hole section 112. The diameter of the clearance hole section 115 gradually increases in the direction away from the third hole section 113, providing guidance for the installation of the second seal 3 and reducing the risk of assembly misalignment. Preferably, the top end face of the second seal 3 is flush with the opening of the injection hole 11, which can prevent the intrusion of external media and facilitate the formation of a continuous weld during subsequent welding operations. More preferably, the gap between the second seal 3 and the clearance hole section 115 is fixed and filled by welding to form a third sealing structure, which further improves the sealing effect.

[0025] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A phase change plate sealing structure, characterized in that, include: The phase change plate (1) is provided with a receiving chamber (12) and an injection hole (11) communicating with the receiving chamber (12). The first sealing element (2) is disposed in the injection hole (11) and is used to seal the receiving chamber (12). The second seal (3) is fixed in the injection hole (11) and located on the side of the first seal (2) away from the receiving chamber (12); The first sealing member (2) and the second sealing member (3) form a gap cavity (13) between the inner wall of the injection hole (11).

2. The phase change plate sealing structure according to claim 1, characterized in that: The injection hole (11) includes a first hole section (111) and a second hole section (112) that are connected. The diameter of the first hole section (111) is smaller than the diameter of the second hole section (112). The first seal (2) is threadedly connected to the second hole section (112).

3. The phase change plate sealing structure according to claim 2, characterized in that: A transition section (114) is provided between the first hole section (111) and the second hole section (112). The diameter of the transition section (114) gradually increases from the first hole section (111) to the second hole section (112). The end edge of the first sealing member (2) is provided with a first arc sealing surface (23). The first arc sealing surface (23) abuts against the inner wall of the transition section (114) to achieve sealing.

4. The phase change plate sealing structure according to claim 3, characterized in that: The first sealing element (2) includes an upper sealing section (21) and a lower sealing section (22). The diameter of the lower sealing section (22) is smaller than that of the upper sealing section (21). The lower sealing section (22) forms an annular gap with the inner wall of the second hole section (112).

5. The phase change plate sealing structure according to claim 4, characterized in that: The upper sealing section (21) and the second hole section (112) are connected by thread sealant to form a sealed connection.

6. The phase change plate sealing structure according to claim 2, characterized in that: The injection hole (11) is provided with a third hole section (113) that communicates with the second hole section (112). The diameter of the third hole section (113) is larger than the diameter of the second hole section (112). The second sealing element (3) is fixed in the third hole section (113).

7. The phase change plate sealing structure according to claim 6, characterized in that: The third hole segment (113) is provided with a clearance hole segment (115) at the end away from the second hole segment (112), and the diameter of the clearance hole segment (115) gradually increases in the direction away from the third hole segment (113).

8. The phase change plate sealing structure according to claim 6, characterized in that: The second seal (3) has a second arc sealing surface (31) on the edge of its end face facing the first seal (2).

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