A leakproof deformation joint

Abstract

The utility model discloses a kind of air leakage prevention deformation joints, including telescopic sealing assembly, the sealing assembly is fixedly installed in gap, the gap is the gap formed by two structural members in hole body, two structural members are respectively air flow upstream structural member and air flow downstream structural member along air flow direction;Flow guide plate connected to structural member is provided below the sealing assembly, one end of the flow guide plate is fixed end, the other end is movable end, the fixed end is fixedly connected to air flow upstream structural member, the movable end extends to the lower end surface of air flow downstream structural member;The utility model can seal gap by telescopic sealing assembly, and structural member flow guide plate is installed below sealing assembly, air flow can be avoided into gap, and the service life can also be avoided by sealing assembly long time under air flow impact.

Description

Technical Field

[0001] This utility model relates to building structural components, specifically a leak-proof expansion joint structure. Background Technology

[0002] As a core piece of equipment for aerodynamic research and testing in fields such as aerospace, automotive engineering, and building fluid mechanics, wind tunnels play an irreplaceable and important role in industrial research and development and scientific exploration because their operational performance directly affects the accuracy and reliability of test data.

[0003] During the construction of a wind tunnel, its main structure is assembled from multiple structural components. There will be gaps between adjacent structural components (such as wall panels, hanging plates, and guide plates) to overcome small relative movements between adjacent structural components (such as those caused by thermal expansion and contraction).

[0004] However, wind tunnels have extremely high requirements for overall airtightness during operation. If the gaps created by relative movement are not effectively addressed, they can easily become leakage channels. When airflow leaks through these gaps inside the wind tunnel, it directly disrupts the stability of the wind tunnel flow field, causing the pressure distribution in the test area to deviate from the preset operating conditions. This affects the measurement accuracy of key parameters such as airflow velocity and pressure in aerodynamic tests, leading to distorted test data. Simultaneously, the airflow impact caused by leakage may exert continuous dynamic loads on the connection structures of adjacent structural components. Over long-term operation, this can exacerbate fatigue damage to structural components, shorten the wind tunnel's service life, and even pose safety hazards. Utility Model Content

[0005] Therefore, in order to solve the above-mentioned shortcomings, this utility model provides an air-leakage-proof expansion joint structure. The gap can be sealed by a telescopic sealing component, and a guide plate installed on the structural component is set below the sealing component to prevent airflow from entering the gap and to prevent the sealing component from being affected by airflow impact for a long time, thus affecting its service life.

[0006] Specifically, an air-leakage-proof expansion joint includes a retractable sealing component, which is fixedly installed in the gap. The gap is a gap formed by two structural components in the cavity, and the two structural components are an upstream structural component and a downstream structural component along the airflow direction, respectively.

[0007] Below the sealing assembly, a guide plate connected to the structural member is provided. One end of the guide plate is a fixed end, and the other end is a movable end. The fixed end is fixedly connected to the upstream structural member of the airflow, and the movable end extends to the lower end face of the downstream structural member of the airflow.

[0008] Optionally, the downstream structural member of the airflow is provided with a sliding area adapted to the movable end.

[0009] Optionally, the airflow side of the deflector has a smoothly transitioned protrusion.

[0010] Optionally, the sealing assembly includes a vertically arranged zigzag rubber strip and a sealing rubber strip, wherein the sealing rubber strip is close to the inside of the cavity.

[0011] Optionally, the two sides of the zigzag rubber strip and the sealing rubber strip are respectively connected to the sides of the gap by pre-embedded parts to form a sealed connection.

[0012] This utility model has the following advantages:

[0013] This utility model is an air-leakage-proof expansion joint structure. The gap can be sealed by a telescopic sealing component. A guide plate installed on the structural component below the sealing component can prevent airflow from entering the gap and also prevent the sealing component from being affected by airflow impact for a long time, thus affecting its service life.

[0014] The sealing assembly includes a zigzag rubber strip and a sealing rubber strip, which can improve the airtightness. Furthermore, the zigzag rubber strip and the sealing rubber strip can adapt to changes in the gap width, avoiding seal failure due to changes in the gap width.

[0015] Meanwhile, the guide plate is provided with a slightly raised portion, which can press the guide plate under the action of airflow, thereby keeping the guide plate in a state of close contact with the structural components. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the air-leakage-proof expansion joint described in this utility model;

[0017] Figure 2 This is a schematic diagram of one structure of the guide plate described in this utility model;

[0018] Figure 3 This is another structural schematic diagram of the guide plate described in this utility model;

[0019] In the figure: 100, upstream structural component of airflow; 200, downstream structural component of airflow; 201, sliding zone; 300, zigzag rubber strip; 400, sealing rubber strip; 500, guide plate; 501, fixed end; 502, movable end; 503, protrusion. Detailed Implementation

[0020] The embodiments of this application 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 intended to explain this application, and should not be construed as limiting this application.

[0021] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0022] As described in the background section, wind tunnels require extremely high overall airtightness during operation. If the gaps created by relative movement are not effectively addressed, they can easily become leakage channels. When airflow leaks through these gaps inside the wind tunnel, it directly disrupts the stability of the wind tunnel's flow field, causing the pressure distribution in the test area to deviate from the preset operating conditions. This affects the measurement accuracy of key parameters such as airflow velocity and pressure in aerodynamic tests, leading to distorted test data. Simultaneously, the airflow impact caused by leakage may exert continuous dynamic loads on the connection structures of adjacent structural components. Over long-term operation, this can exacerbate fatigue damage to structural components, shorten the wind tunnel's service life, and even pose safety hazards.

[0023] For the reasons mentioned above, such as Figures 1-3 As shown, this embodiment provides an air-leakage-proof expansion joint, including a retractable sealing component, which is fixedly installed in the gap. The gap is a gap formed by two structural components in the cavity. The two structural components are an upstream structural component 100 and a downstream structural component 200 along the airflow direction.

[0024] Below the sealing assembly, a guide plate 500 connected to the structural member is provided. One end of the guide plate is a fixed end 501, and the other end is a movable end 502. The fixed end 501 is fixedly connected to the upstream structural member 100 of the airflow, and the movable end 502 extends to the lower end face of the downstream structural member 200 of the airflow.

[0025] The aforementioned technical features can seal the gap through a flexible sealing component, and the baffle plate installed on the structural component below the sealing component can prevent airflow from entering the gap and also prevent the sealing component from being impacted by airflow for a long time, thus affecting its service life.

[0026] In order to enable the movable end 502 of the guide plate 500 to move smoothly back and forth, in one embodiment, the downstream structural member 200 of the airflow is provided with a sliding area 201 adapted to the movable end, which is a groove provided with the downstream structural member of the airflow.

[0027] The aforementioned technical features, through the sliding zone, ensure that the movable end can move smoothly back and forth, avoiding any contact between the downstream structural components and the movable end.

[0028] In order to make the guide plate fit with the downstream structural component of the airflow, in one embodiment, the airflow side of the guide plate 500 has a smoothly transitioned protrusion 503.

[0029] In the above-mentioned technical features, the protrusion can be an arc-shaped protrusion on the airflow side of the guide vane (e.g., Figure 2 As shown), the protrusion is slightly convex, or the airflow side of the deflector can be an inclined surface (such as...). Figure 3 As shown in the figure, the upstream height of the airflow on the inclined surface is lower than the downstream height of the airflow, thus forming a protrusion. During implementation, the airflow acts on the protrusion on the guide plate, which can press the guide plate against the downstream structural component of the airflow.

[0030] To improve the sealing performance of the gap, in one embodiment, such as Figure 1 As shown, the sealing assembly includes a vertically arranged zigzag rubber strip 300 and a sealing rubber strip 400, wherein the sealing rubber strip is located close to the inner side of the cavity. The two sides of the zigzag rubber strip and the sealing rubber strip are respectively connected to the sides of the gap via pre-embedded parts for airtight sealing. The sealing assembly, including the zigzag rubber strip and the sealing rubber strip, can improve the airtightness effect, and the zigzag rubber strip and the sealing rubber strip can adapt to changes in the gap width, avoiding seal failure due to changes in the gap width.

[0031] For example, such as Figure 1 As shown, the zigzag rubber strip 300 has lugs on both sides, which are fixed by expansion screws; the sealing rubber strip 400 is fixedly connected by pre-embedded steel parts.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A leak-proof expansion joint, characterized in that: The system includes a retractable sealing assembly that is fixedly installed in a gap, the gap being a gap formed by two structural members in the cavity, the two structural members being an upstream structural member and a downstream structural member along the airflow direction; Below the sealing assembly, a guide plate connected to the structural member is provided. One end of the guide plate is a fixed end, and the other end is a movable end. The fixed end is fixedly connected to the upstream structural member of the airflow, and the movable end extends to the lower end face of the downstream structural member of the airflow.

2. The air-leakage-proof expansion joint according to claim 1, characterized in that: The downstream structural component of the airflow is provided with a sliding area adapted to the movable end.

3. The air-leakage-proof expansion joint according to claim 1, characterized in that: The airflow side of the deflector has a smoothly transitioned protrusion.

4. The air-leakage-proof expansion joint according to claim 1, characterized in that: The sealing assembly includes a zigzag rubber strip arranged vertically and a sealing rubber strip, wherein the sealing rubber strip is close to the inside of the cavity.

5. The air-leakage-proof expansion joint according to claim 4, characterized in that: The two sides of the zigzag rubber strip and the sealing rubber strip are respectively connected to the sides of the gap by pre-embedded parts to form a sealed connection.

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