Variable cross-section sealing strip

Abstract

The utility model discloses a variable cross-section sealing strip which comprises a framework and a sealing edge, the cross section of the framework is trapezoid, a hollow structure is formed inside the framework, a supporting wall is formed on the bottom wall of the framework and is of a flat plate structure, the sealing edge is arranged on the top wall of the framework, an arc-shaped sealing face is formed on the top wall of the sealing edge, and a hollow structure is formed inside the sealing edge. The end face size of the first end of the variable-cross-section sealing strip is smaller than that of the second end, and the variable-cross-section sealing strip is of a gradually-changed-cross-section structure with the cross section size gradually increasing from the first end to the second end. The variable cross-section sealing strip provided by the utility model is suitable for sealing between an orifice and a door body of a square cabin, or sealing door bodies of compartment type equipment such as vehicles and the like. The sealing strip is arranged to be of the gradually-changed section structure, the compression amount of the sealing strip can be locally increased, compression sealing when equipment in the shelter deviates can be met, and compression sealing when the single-side contact distance of the equipment becomes large or small under the actual use working condition can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, and more specifically, to a variable-section sealing strip. Background Art

[0002] Most of the existing sealing strips are of uniform cross-section, and the structures and functions of each part are consistent. They are suitable for the uniform extrusion generated by conventional equipment at the center position at the opening position of box-type equipment (shelter) to achieve the sealing of the equipment.

[0003] However, in actual use, the equipment in the cabin is not necessarily in the center position or there is a problem of excessive compression on one side in actual use conditions, which makes the original conventional sealing strip unable to achieve sealing. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model innovatively provides a variable-section sealing strip, which can solve the technical problem in the prior art that sealing failure is prone to occur at the opening of the cabin.

[0005] In order to achieve the above technical purpose, the utility model discloses a variable cross-section sealing strip, including a frame and a sealing edge, wherein the frame cross-section is trapezoidal, and a hollow structure is formed inside, and a support wall is formed on the bottom wall of the frame, and the support wall is a flat plate structure.

[0006] The sealing edge is arranged on the top wall of the frame, the top wall of the sealing edge forms an arc-shaped sealing surface, and the inside of the sealing edge forms a hollow structure.

[0007] The end surface size of the first end of the variable-section sealing strip is smaller than the end surface size of the second end, and the variable-section sealing strip is a gradual cross-section structure in which the cross-section size gradually increases from the first end to the second end.

[0008] Furthermore, a first support bar is provided in the frame, the first support bar is provided parallel to the bottom surface and the top surface of the frame and connected to two side walls of the frame, and the first support bar divides the interior of the frame into an upper cavity and a lower cavity.

[0009] Furthermore, a second support bar is arranged in the lower cavity, and the second support bar is arranged perpendicular to the first support bar and connected to the first support bar and the bottom surface of the frame.

[0010] Furthermore, one side edge of the bottom wall of the sealing edge is connected to the top wall of the frame, and a gap is formed between the bottom wall of the sealing edge and the top wall of the frame.

[0011] Furthermore, two sealing edges are provided, the two sealing edges are located on the upper side of the top wall of the frame, and are respectively connected to two side edges of the top wall of the frame, and a gap is formed between the two sealing edges.

[0012] Furthermore, the frame and the sealing strip are an integrally formed structure.

[0013] Furthermore, the variable-section sealing strip is a segmented structure, including a plurality of independent sealing segments, each of which is a gradually variable-section structure, and each of which is composed of the skeleton and the sealing edge, the end faces of the first ends of the sealing segments are the same size, and the end faces of the second ends of each of the sealing segments are the same size.

[0014] Furthermore, the first end of the sealing segment is used to connect with the first end of another sealing segment.

[0015] The second end of the sealing segment is used to connect with the second end of another sealing segment.

[0016] Further, the first end surface of the sealing segment forms an inclined surface, and the first end surfaces of the two sealing segments are connected by contact and extrusion of the inclined surfaces; and / or,

[0017] The second end surface of the sealing segment forms an inclined surface, and the second end surfaces of the two sealing segments are connected by contact and extrusion of the inclined surfaces.

[0018] Further, the first end surface of the sealing segment forms a stepped surface, and the first end surfaces of the two sealing segments are connected by contact and extrusion through the stepped surface; and / or,

[0019] The second end surface of the sealing section forms a step surface, and the second end surfaces of the two sealing sections are contact-pressed and connected via the step surface.

[0020] The beneficial effects of the utility model are:

[0021] The variable cross-section sealing strip provided by the utility model is suitable for sealing between the porthole and the door body of a shelter, or for sealing the door body of other equipment such as vehicles and other box-type equipment. By setting the sealing strip to a gradually variable cross-section structure, the compression amount of the sealing strip can be increased locally, which can not only meet the compression sealing when the equipment inside the shelter is offset, but also achieve the compression sealing when the single-side contact distance of the equipment becomes larger or smaller under actual use conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a variable cross-section sealing strip according to an embodiment of the utility model is shown;

[0023] Figure 2 A schematic cross-sectional view of a variable cross-section sealing strip according to an embodiment of the utility model is shown;

[0024] Figure 3 A schematic structural diagram showing a multi-section splicing of a variable cross-section sealing strip according to an embodiment of the utility model;

[0025] Figure 4 A schematic diagram showing a splicing state of multiple sealing segments in one embodiment of the utility model is shown;

[0026] Figure 5 Show Figure 4 A magnified schematic diagram of the middle splicing area;

[0027] Figure 6 A schematic diagram showing a splicing state of multiple sealing segments in one embodiment of the utility model is shown;

[0028] Figure 7 Show Figure 6 A magnified schematic diagram of the splicing area.

[0029] In the figure,

[0030] 1. Frame; 11. Support wall; 12. First support bar; 13. Second support bar; 2. Sealing edge; 21. Sealing surface; 10. Sealing section. DETAILED DESCRIPTION

[0031] The variable cross-section sealing strip provided by the utility model is explained and illustrated in detail below in conjunction with the drawings in the specification.

[0032] The variable cross-section sealing strip provided by the utility model is suitable for sealing between the opening of the cabin and the door body, or in the sealing of the door body of other equipment such as vehicles and other box-type equipment. By setting the sealing strip to a gradually variable cross-section structure, the compression amount of the sealing strip can be increased locally, which can not only meet the compression sealing when the equipment inside the cabin is offset, but also achieve the compression sealing when the single-side contact distance of the equipment becomes larger or smaller under actual use conditions. The utility model is described in detail in combination with specific embodiments below:

[0033] In some embodiments, the utility model provides a variable cross-section sealing strip, such as Figure 1 As shown, it includes a skeleton 1 and a sealing edge 2, and the skeleton 1 and the sealing edge 2 are an integrated structure. The cross-section of the skeleton 1 is a trapezoid, and a hollow structure is formed inside. The bottom wall of the skeleton 1 is formed with a support wall 11, and the support wall 11 is a flat plate structure. The bottom wall of the skeleton 1 is larger than the area of ​​the top wall. The sealing edge 2 is arranged on the top wall of the skeleton 1, and the top wall of the sealing edge 2 forms an arc-shaped sealing surface 21, and a hollow structure is formed inside the sealing edge 2. The hollow structure of the skeleton 1 and the sealing edge 2 can provide a larger compression space, so that the sealing effect is better. The end face size of the first end of the variable-section sealing strip is smaller than the end face size of the second end. The variable-section sealing strip is a gradually changing cross-section structure whose cross-section size gradually increases from the first end to the second end, so that gaps of different sizes can be effectively sealed as needed.

[0034] In some embodiments, a first support bar 12 is provided in the skeleton 1. The first support bar 12 is provided in parallel with the bottom and top surfaces of the skeleton 1 and is connected to the two side walls of the skeleton 1. The first support bar 12 divides the interior of the skeleton 1 into an upper cavity and a lower cavity. The provision of the first support bar 12 can increase the support of the skeleton 1 and improve the sealing effect. Optionally, a second support bar 13 is provided in the lower cavity. The second support bar 13 is provided perpendicular to the first support bar 12 and is connected to the first support bar 12 and the bottom surface of the skeleton 1. The provision of the second support bar 13 can further improve the sealing performance of the skeleton 1. The provision of the first support bar 12 and the second support bar 13 can be selected according to the size of the skeleton 1. Only the first support bar 12 or both are provided at the same time. In other embodiments, when the size of the skeleton 1 is large, more support bars can be provided at different positions to ensure that the skeleton 1 has sufficient support, such as Figure 2 As shown, two second support bars 13 may be provided.

[0035] In some embodiments, the top wall of the sealing edge 2 is in an arc shape, and the bottom wall and the side wall are both flat plate structures. One side of the bottom wall of the sealing edge 2 is connected to the top wall of the frame 1, and a gap is formed between the bottom wall of the sealing edge 2 and the top wall of the frame 1. In this way, the deformation of the sealing edge 2 when under pressure can be increased, and the sealing effect can be improved. In this embodiment, two sealing edges 2 are provided, and the two sealing edges 2 are located on the upper side of the top wall of the frame 1 and are respectively connected to the two side edges of the top wall of the frame 1, and a gap is formed between the two sealing edges 2. The provision of two sealing edges 2 can provide double sealing, and the two sealing edges 2 are independent of each other and will not affect each other, and can independently play a sealing effect.

[0036] In this embodiment, the frame 1 and the sealing strip are an integrally formed structure, for example, integrally injection molded using a dedicated mold.

[0037] In some embodiments, the variable cross-section sealing strip is a segmented structure, such as Figure 3 As shown, it includes multiple independent sealing segments 10, each of which has a gradient cross-section structure, and each of which is composed of a skeleton 1 and a sealing edge 2. The end faces of the first ends of each sealing segment 10 are the same in size, and the end faces of the second ends of each sealing segment 10 are the same in size. When used, multiple sealing segments 10 are spliced ​​and used according to actual needs. The segmented setting can reduce the length of each sealing segment 10, making it easier to ensure the molding accuracy.

[0038] In some embodiments, the first end of the sealing segment 10 is used to connect to the first end of another sealing segment 10, and the second end of the sealing segment 10 is used to connect to the second end of another sealing segment 10, that is, when spliced, the first ends of different sealing segments 10 are butt-jointed with the first ends, and the second ends are butt-jointed with the second ends to ensure that the joint does not affect the sealing effect.

[0039] Alternatively, if Figure 4 , Figure 5 As shown, the end face of the first end of the sealing segment 10 forms an inclined surface, and the end faces of the first ends of the two sealing segments 10 are connected by contact and extrusion of the inclined surface, and the end faces of the first ends of the two butted sealing segments 10 are inclined in the same direction, and the end faces of the two first ends are pressed together during installation. Similarly, the end face of the second end of the sealing segment 10 forms an inclined surface, and the end faces of the second ends of the two sealing segments 10 are connected by contact and extrusion of the inclined surface, and the end faces of the first ends of the two butted sealing segments 10 are inclined in the same direction, and the end faces of the two first ends are pressed together during installation. The setting of the inclined surface can increase the contact area on the one hand, and can also be pressed under both lateral and longitudinal pressures on the other hand.

[0040] Alternatively, if Figure 6 , Figure 7 As shown, the first end face of the sealing segment 10 forms a stepped surface, and the first end faces of the two sealing segments 10 are connected by contacting and extruding through the stepped surface. Similarly, the second end face of the sealing segment 10 forms a stepped surface, and the second end faces of the two sealing segments 10 are connected by contacting and extruding through the stepped surface. The setting of the stepped surface can also make the two butted end faces pressed together under lateral and longitudinal pressures, thereby improving the sealing effect.

[0041] When the variable cross-section sealing strip provided by the utility model is produced, a special mold for processing and manufacturing the variable cross-section sealing strip is designed and developed. The special mold adopts a variable cross-section sealing strip structure with a minimum size at one end and a variable cross-section sealing strip structure with a maximum size at one end. Preferably, a segmented mold is adopted. The segmented mold can control the accuracy of rubber drawing within a smaller length range. At the same time, the segmented mold can save costs and avoid the cost increase of using an integral mold. In addition, the segmented mold can better control the rubber raw material of the sealing strip from the large end of the mold to the small end of the mold surface, which is convenient for drawing and forming the variable cross-section sealing strip.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the description of this specification, the description with reference to the terms "this embodiment", "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any at least one embodiment or example. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and simple improvements made to the essential contents of the present invention shall be included in the protection scope of the present invention.

Claims

1. A variable cross-section sealing strip, characterized in that: It includes a frame and a sealing edge. The frame has a trapezoidal cross section and a hollow structure is formed inside. The bottom wall of the frame is formed with a supporting wall, and the supporting wall is a flat plate structure. The sealing edge is arranged on the top wall of the frame, the top wall of the sealing edge forms an arc-shaped sealing surface, and the inside of the sealing edge forms a hollow structure. The end surface size of the first end of the variable-section sealing strip is smaller than the end surface size of the second end, and the variable-section sealing strip is a gradual cross-section structure in which the cross-section size gradually increases from the first end to the second end.

2. The variable cross-section sealing strip according to claim 1, characterized in that: A first support bar is arranged in the frame, the first support bar is arranged parallel to the bottom surface and the top surface of the frame and connected to two side walls of the frame, and the first support bar divides the interior of the frame into an upper cavity and a lower cavity.

3. The variable cross-section sealing strip according to claim 2, characterized in that: A second support bar is arranged in the lower cavity, and the second support bar is arranged perpendicular to the first support bar and connected to the first support bar and the bottom surface of the frame.

4. The variable cross-section sealing strip according to claim 1, characterized in that: One side edge of the bottom wall of the sealing edge is connected to the top wall of the frame, and a gap is formed between the bottom wall of the sealing edge and the top wall of the frame.

5. The variable cross-section sealing strip according to claim 4, characterized in that: The two sealing edges are provided, and the two sealing edges are located on the upper side of the top wall of the frame and are respectively connected to the two side edges of the top wall of the frame, and a gap is formed between the two sealing edges.

6. The variable cross-section sealing strip according to any one of claims 1 to 5, characterized in that: The frame and the sealing strip are an integrally formed structure.

7. The variable cross-section sealing strip according to any one of claims 1 to 5, characterized in that: The variable-section sealing strip is a segmented structure, including a plurality of independent sealing segments, each of which is a gradually variable-section structure, and each of which is composed of the skeleton and the sealing edge. The end faces of the first ends of the sealing segments are of the same size, and the end faces of the second ends of each of the sealing segments are of the same size.

8. The variable cross-section sealing strip according to claim 7, characterized in that: The first end of the sealing segment is used to connect with the first end of another sealing segment. The second end of the sealing segment is used to connect with the second end of another sealing segment.

9. The variable cross-section sealing strip according to claim 8, characterized in that: The first end surface of the sealing segment forms an inclined surface, and the first end surfaces of the two sealing segments are connected by contact and extrusion of the inclined surfaces; and / or, The second end surface of the sealing segment forms an inclined surface, and the second end surfaces of the two sealing segments are connected by contact and extrusion of the inclined surfaces.

10. The variable cross-section sealing strip according to claim 8, characterized in that: The first end surface of the sealing section forms a step surface, and the first end surfaces of the two sealing sections are connected by contact and extrusion through the step surface; and / or, The second end surface of the sealing section forms a step surface, and the second end surfaces of the two sealing sections are contact-pressed and connected via the step surface.

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