Screen structure and flow detection device

Abstract

The embodiment of the invention belongs to the field of screen manufacturing, and relates to a screen structure and a flow detection device. The screen structure comprises an upper pressing ring, a flexible net and a lower pressing ring. The upper pressing ring and the lower pressing ring are each of a hollow annular structure. The flexible net is fixed between the upper pressing ring and the lower pressing ring; an annular groove is formed in the periphery of the upper surface of the lower pressing ring; the upper pressing ring is fixedly connected with the lower pressing ring, and the upper pressing ring is embedded in the annular groove and presses the peripheral edge of the flexible net to be bent to the side close to the annular groove. According to the technical scheme, the technical problems that when a hardware edge covering technology is adopted for achieving the tightening effect of a flexible net in the prior art, the machining requirement of the screen structure is high, and the technological process is long can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of screen manufacturing, and more specifically, to a screen structure and a flow detection device. Background Art

[0002] The mesh structure is a common filtering structure, which is mostly used in various fluid filters to filter the fluid passing through the mesh. In addition, the mesh structure can also be used in differential pressure flow sensors to obtain the change in the fluid pressure value after passing through the mesh, and then determine the flow rate of the fluid based on the change in the pressure value.

[0003] The existing screen structure can generally include a flexible net and a fixing component of the flexible net, and the fixing component can include an upper pressure ring and a lower pressure ring structure. Specifically, the upper pressure ring and the lower pressure ring are both annular structures with a hollow inner circle, and are made of hardware. During processing, the flat flexible net is placed between the upper pressure ring and the lower pressure ring, and the centers of the upper pressure ring and the lower pressure ring are aligned and pressed to fix the flexible net. Afterwards, the upper and lower pressure rings are subjected to an edge wrapping process. During the edge wrapping process, the structural deformation of the hardware is used to tighten the flexible net and fix the upper and lower pressure rings, thereby completing the assembly of the screen structure.

[0004] In order to achieve the tightening effect of the flexible net, in the above-mentioned screen structure, the upper and lower pressure rings are subjected to the hardware edging process, but this process has high processing requirements for the upper and lower pressure rings and a long process flow. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present application is that when a hardware edging process is used in the screen structure to achieve a tightening effect of the flexible screen, the screen structure has high processing requirements and a long process flow.

[0006] In order to solve the above technical problems, the first aspect of the embodiment of the present application provides a screen structure, which adopts the following technical solution: Upper pressure ring, flexible net and lower pressure ring; The upper pressure ring and the lower pressure ring are both hollow annular structures; The flexible net is fixed between the upper pressure ring and the lower pressure ring; The upper surface of the lower pressure ring is provided with an annular groove around its periphery; The upper pressing ring is fixedly connected to the lower pressing ring. The upper pressing ring is embedded in the annular groove and presses the edges of the flexible net to bend toward a side close to the annular groove.

[0007] In some possible implementations, the upper pressure ring is made of a first plastic material, is injection molded, and is bonded to the upper surface of the lower pressure ring. After the upper pressure ring is hardened, a boss structure consistent with the shape of the annular groove is formed, and the boss structure is embedded in the annular groove and presses and fixes the four edges of the flexible net.

[0008] In some possible implementations, the lower pressure ring is made of a second plastic material, and the second plastic material has stronger rigidity and a smaller thermal expansion coefficient than the first plastic material.

[0009] In some possible implementations, the lower pressure ring is made of metal, and the upper surface of the lower pressure ring has a microporous structure.

[0010] In some possible implementations, the upper pressure ring is fixedly connected to the lower pressure ring by gluing.

[0011] In some possible implementations, the edge of the lower pressure ring protrudes upward to form a convex edge and envelops the surrounding edges of the upper pressure ring.

[0012] In some possible implementations, shaping films are respectively provided on both side surfaces of the flexible net.

[0013] In order to solve the above technical problems, the embodiment of the present application further provides a flow detection device, which adopts the following technical solution: A flow detection device comprises the screen structure as described in the first aspect and any possible implementation of the first aspect.

[0014] Compared with the prior art, the embodiments of the present application have the following beneficial effects: In the embodiment of the present application, the upper surface of the lower pressure ring in the screen structure facing the upper pressure ring has an annular groove. During the process of installing the upper pressure ring and fixing it with the lower pressure ring, the upper pressure ring can be embedded in the annular groove in whole or in part. During the embedding process, the edge of the flexible net will be dragged and stretched, so that the flexible net can be tightened while the upper pressure ring and the lower pressure ring are fixed. When the screen structure is assembled, there is no need to use the edging process, and the processing requirements for the upper and lower pressure rings are lower than the traditional edging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the scheme of the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1A schematic diagram of an embodiment of a screen structure according to an embodiment of the present application; Figure 2 This is a schematic diagram of a cross-sectional embodiment of a screen structure through the center of an embodiment of the present application. Reference numerals: 110, upper pressure ring; 120, flexible net; 130, lower pressure ring; 140, shaping film; 131. Annular groove. Implementation

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0018] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0020] See Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of an embodiment of a screen structure in the embodiment of the present application. Figure 2 This is a schematic diagram of a cross-section through the center of a screen structure according to an embodiment of the present application, wherein the screen structure comprises: An upper pressure ring 110, a flexible net 120 and a lower pressure ring 130; The upper pressure ring 110 and the lower pressure ring 130 are both hollow annular structures; The flexible net 120 is fixed between the upper pressure ring 110 and the lower pressure ring 130; The upper surface of the lower pressure ring 130 is provided with an annular groove 131 around the periphery; The upper pressing ring 110 is fixedly connected to the lower pressing ring 130 . The upper pressing ring 110 is embedded in the annular groove 131 and presses the edges of the flexible net 120 to bend toward a side close to the annular groove 131 .

[0021] In the embodiment of the present application, the screen structure comprises an upper pressure ring 110, a flexible net 120 and a lower pressure ring 130. Both the upper pressure ring 110 and the lower pressure ring 130 are hollow annular structures and may be sheet-shaped, and the hollow inner rings of the two rings are the same. The flexible net 120 is located between the upper pressure ring 110 and the lower pressure ring 130. After the upper pressure ring 110 and the lower pressure ring 130 are assembled and fixedly connected, the edges of the flexible net 120 can be pressed tightly, thereby fixing the flexible net 120.

[0022] Among them, the lower pressure ring 130 is also provided with an annular groove 131 structure around the upper surface of the side facing the upper pressure ring 110. The annular groove 131 can be provided on the side surface of the lower pressure ring 130. The upper pressure ring 110 itself is close to the shape of the groove structure, or the upper pressure ring 110 can have a boss structure close to the shape of the groove structure. When the upper pressure ring 110 and the lower pressure ring 130 are assembled and fixedly connected, the lower pressure ring 130 is first fixed, and then the flat flexible net 120 is aligned and placed on the lower pressure ring 130. After being placed, the edge of the flexible net 120 can completely or partially cover the annular groove 131. Afterwards, the upper pressure ring 110 is aligned and fixed to the lower pressure ring 130. During the fixing process, the upper pressure ring 110 or the boss structure of the upper pressure ring 110 can be embedded in the annular groove 131. In addition, during the fitting process, the edge of the flexible net 120 is pulled and stretched by the upper pressure ring 110 or the boss structure on the upper pressure ring 110, and the edges of the flexible net 120 are bent toward the side close to the annular groove 131. Since the flexible net 120 is pulled and stretched all around during the process, the flexible net 120 can be tightened.

[0023] In addition, the degree of tension of the flexible net 120 is related to the shape of the annular groove 131. The flexible net 120 may be a multi-layer net structure, such as an upper net, a middle net and a lower net. The cross section of the annular groove 131 is concave downward compared to the inner ring side wall, so that the flexible net 120 can bend toward the groove. The annular groove 131 may be in various shapes or may be a plurality of parallel grooves, which are not specifically limited here.

[0024] Compared with the prior art, the embodiments of the present application have the following beneficial effects: In the embodiment of the present application, the upper surface of the lower pressure ring 130 in the screen structure facing the upper pressure ring 110 has an annular groove 131. During the process of installing and fixing the upper pressure ring 110 with the lower pressure ring 130, the upper pressure ring 110 can be embedded in the annular groove 131 in whole or in part. During the embedding process, the edge of the flexible net 120 will be dragged and stretched, so that the flexible net 120 can be tightened while the upper pressure ring 110 and the lower pressure ring 130 are fixed. When the screen structure is assembled, there is no need to use the edging process, and the processing requirements for the upper and lower pressure rings 130 are lower than the traditional edging process.

[0025] In some possible implementations, the upper pressure ring 110 is made of a first plastic material, and is injection molded and bonded to the upper surface of the lower pressure ring 130. After the upper pressure ring 110 hardens, a boss structure consistent with the shape of the annular groove 131 is formed, and the boss structure is embedded in the annular groove 131 and presses and fixes the four edges of the flexible net 120.

[0026] In the embodiment of the present application, the upper pressure ring 110 can be specifically made of a first plastic material, and the upper pressure ring 110 can be manufactured by an injection molding process. The upper surface of the lower pressure ring 130 facing the upper pressure ring 110 can be bonded to the first plastic material, and the lower pressure ring 130 can be, for example, a material that is the same as or similar to the first plastic material, or a metal material, and the metal material can be realized by machining, powder metallurgy injection molding, 3D printing, and other processes.

[0027] Specifically, in the manufacture of the screen structure, after the flattened flexible net 120 is placed on the lower pressure ring 130, the upper surface of the lower pressure ring 130 is used as the bottom surface or substrate of the injection mold of the upper pressure ring 110, and the upper pressure ring 110 is injection molded on the upper surface. During the injection molding process, the fluid of the upper pressure ring 110 can compress the flexible net 120 to bend in the direction of the annular groove 131, so that it is tightened to a certain extent, and is bonded and connected with the upper surface of the lower pressure ring 130. Among them, if the materials of the upper pressure ring 110 and the lower pressure ring 130 are the same, the bonding can specifically refer to fusion, that is, the surfaces of the upper pressure ring 110 and the lower pressure ring 130 at the contact point are fused together. After the upper pressure ring 110 is hardened, the lower surface of the upper pressure ring 110 forms a boss shape consistent with the annular groove 131. In addition, during the injection molding process, a certain pressure can be applied to the unhardened upper pressure ring 110 after injection molding. On the one hand, this can promote tighter bonding between the upper pressure ring 110 and the lower pressure ring 130 to avoid bonding gaps, and on the other hand, it can further improve the tightening effect.

[0028] In addition, in order to prevent the flexible net 120 from being melted or deformed by impact, the temperature resistance of the material selected for the flexible net 120 needs to be higher than the material temperature used for injection molding of the first plastic material.

[0029] In some possible implementations, the lower pressure ring 130 is made of a second plastic material, and the second plastic material has stronger rigidity and a smaller thermal expansion coefficient than the first plastic material.

[0030] In the embodiment of the present application, the lower pressure ring 130 can be made of a second plastic material, and the lower pressure ring 130 can also be manufactured by an injection molding process. After the lower pressure ring 130 is hardened, the flattened flexible net 120 is placed on its upper surface, and the injection mold is replaced with the injection mold of the upper pressure ring 110, and then the subsequent assembly of the screen structure is performed. Among them, the second plastic material is close to the first plastic material, so that the upper pressure ring 110 can be better injection-molded and bonded with the lower pressure ring 130, and the second plastic material has stronger rigidity and smaller thermal expansion coefficient than the first plastic material, which can avoid thermal deformation during the bonding process of the upper pressure ring 110 and the lower pressure ring 130.

[0031] In some possible implementations, the lower pressure ring 130 is made of metal, and the upper surface of the lower pressure ring 130 has a microporous structure.

[0032] In the embodiment of the present application, the lower pressure ring 130 can also be made of metal, or a material with low molecular structure similarity to the upper pressure ring 110, in which case the lower pressure ring 130 needs to be surface treated. For example, the metal material is nano-etched to achieve a microporous structure on the surface of the metal material, and the upper pressure ring 110 uses a special material for nano injection molding. During the injection molding process, the material of the upper pressure ring 110 is in a molten state, and the material is nano-scale. During the injection molding process, better adhesion between the upper pressure ring 110 and the lower pressure ring 130 can be achieved, and the upper pressure ring 110 and the lower pressure ring 130 can be connected and fixed.

[0033] In some possible implementations, the upper pressure ring 110 is fixedly connected to the lower pressure ring 130 by gluing.

[0034] In the embodiment of the present application, the upper pressure ring 110 and the lower pressure ring 130 can also be fixedly connected by gluing. Specifically, during assembly, the upper surface of the lower pressure ring 130 can be coated with glue first, and then the flexible net 120 can be aligned and placed on the lower pressure ring 130, and then the annular groove 131 can be aligned to press the upper pressure ring 110 and the lower pressure ring 130 together. After pressing, the two can be left to stand for a period of time or dried to make them more tightly combined.

[0035] In some possible implementations, the edge of the lower pressure ring 130 protrudes upward to form a convex edge and envelops the surrounding edges of the upper pressure ring 110 .

[0036] In the embodiments of this application, specific reference is made to Figure 1or Figure 2 The edge of the lower pressure ring 130 can also bulge upward to form a convex edge, which can envelop the edges of the upper pressure ring 110. On the one hand, it can better realize the positioning and assembly of the upper pressure ring 110, and on the other hand, it can increase the contact area between the upper pressure ring 110 and the lower pressure ring 130, which is convenient for better bonding connection.

[0037] In some possible implementations, shaping films 140 are respectively disposed on both side surfaces of the flexible net 120 .

[0038] In the embodiments of this application, specific reference is made to Figure 1 To protect the flexible net 120, shaping films 140 are respectively provided on both sides of the flexible net 120. The shaping films 140 are high temperature resistant, which can prevent the flexible net 120 from being damaged during the assembly process of the screen structure.

[0039] In order to solve the above technical problems, the embodiment of the present application further provides a flow detection device, which adopts the following technical solution: A flow detection device, comprising: Figure 1 , Figure 2 Or the screen structure described in any possible implementation.

[0040] Specifically, the flow detection device may refer to a differential pressure flow sensor, which may include: Figure 1 , Figure 2 Or the screen structure and pressure detection module described in any possible implementation manner can determine the flow rate of the fluid by detecting the pressure difference of the fluid flowing through the screen structure.

[0041] Compared with the prior art, the embodiments of the present application have the following beneficial effects: In the embodiment of the present application, the flow detection device includes: Figure 1 , Figure 2 Or the screen structure described in any possible implementation, wherein the upper surface of the lower pressure ring 130 in the screen structure facing the upper pressure ring 110 has an annular groove 131, and during the process of installing and fixing the upper pressure ring 110 with the lower pressure ring 130, the upper pressure ring 110 can be embedded in the annular groove 131 in whole or in part, and the edge of the flexible net 120 can be dragged and stretched during the embedding process, so that the flexible net 120 can be tightened while the upper pressure ring 110 and the lower pressure ring 130 are fixed. When the screen structure is assembled, there is no need to use the edging process, and the processing requirements for the upper and lower pressure rings 130 are lower than the traditional edging process.

[0042] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A screen structure, characterized in that: include: Upper pressure ring, flexible net and lower pressure ring; The upper pressure ring and the lower pressure ring are both hollow annular structures; The flexible net is fixed between the upper pressure ring and the lower pressure ring; The upper surface of the lower pressure ring is provided with an annular groove around its periphery; The upper pressing ring is fixedly connected to the lower pressing ring. The upper pressing ring is embedded in the annular groove and presses the edges of the flexible net to bend toward a side close to the annular groove.

2. The screen structure according to claim 1, characterized in that: The upper pressure ring is made of a first plastic material, is injection molded and bonded to the upper surface of the lower pressure ring, and after hardening, forms a boss structure consistent with the shape of the annular groove, and the boss structure is embedded in the annular groove and presses and fixes the edges of the flexible net.

3. The screen structure according to claim 2, characterized in that: The lower pressure ring is made of a second plastic material, and the second plastic material has stronger rigidity and a smaller thermal expansion coefficient than the first plastic material.

4. The screen structure according to claim 2, characterized in that: The lower pressure ring is made of metal, and the upper surface of the lower pressure ring has a microporous structure.

5. The screen structure according to claim 1, characterized in that: The upper pressure ring is fixedly connected to the lower pressure ring by gluing.

6. The screen structure according to any one of claims 1 to 4, characterized in that: The edge of the lower pressing ring protrudes upward to form a convex edge and envelops the surrounding edges of the upper pressing ring.

7. The screen structure according to any one of claims 1 to 4, characterized in that: The two side surfaces of the flexible net are also respectively provided with shaping films.

8. A flow detection device, characterized in that: The invention comprises the screen structure as claimed in any one of claims 1 to 6.

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