Micro-grid gas detector and preparation tool thereof

Abstract

The utility model relates to the technical field of micro-grid gas detectors, in particular to a micro-grid gas detector and a preparation tool thereof. The grid gas detector comprises an anode plate, a supporting framework and a wire mesh electrode, wherein the supporting framework is used for forming an air gap between the anode plate and the wire mesh electrode; the supporting framework is fixedly connected with the anode plate through a first glue brushing layer, and the wire mesh electrode is fixedly connected with the supporting framework through a second glue brushing layer; the first glue brushing layer and the second glue brushing layer are formed by curing curable liquid glue. The preparation tool is used for achieving formation of the first glue brushing layer and the second glue brushing layer. The thickness of the supporting framework can be controlled, and flexible adjustment of the air gap is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of micro-grid gas detectors, and in particular to a grid gas detector and a preparation tool thereof. Background Art

[0002] The microgrid gas detector has been introduced in detail in the Chinese patent document with patent application publication number CN108531091A. At the same time, the patent also proposes a new manufacturing process. In the previously disclosed process, a hot melt adhesive film is used to form an air gap between the anode plate and the wire mesh electrode. Its main defects are caused by the fact that the hot melt adhesive film used in this process is a special material and the production process is only mastered by a small group of people. It is mainly reflected in: 1. High cost; 2. All hot melt adhesive films need to be specially customized, and the long customized supply cycle seriously hinders further innovation and breakthroughs in technology. Summary of the invention

[0003] In order to solve certain defects in the prior art, the present invention provides a grid gas detector.

[0004] A grid gas detector according to the present invention includes an anode plate and at least one air gap structure stacked in the thickness direction of the anode plate, the air gap structure includes a supporting frame and a wire mesh electrode, the supporting frame is used to form an air gap; the supporting frame is fixedly connected to the anode plate or the lower air gap structure by a first brush glue layer, and the wire mesh electrode is fixedly connected to the supporting frame by a second brush glue layer; the first brush glue layer and the second brush glue layer are both formed by curing a curable liquid glue.

[0005] The above method eliminates the need for hot melt adhesive film to form the air gap, and the prefabricated support frame can be directly bonded between the anode plate and the wire mesh electrode, so the air gap can be formed at low cost and quickly. The thickness of the support frame can be more flexibly controlled to achieve flexible adjustment of the air gap. For products, the rapid preparation of micro-grid gas detectors with various requirements can be achieved, and for technological innovation, it can effectively promote technological innovation and improvement.

[0006] Preferably, the support frame has a support frame corresponding to the edge area of ​​the wire mesh electrode and a support column corresponding to the middle area of ​​the wire mesh electrode, so that the formation of the air gap can be better facilitated.

[0007] Preferably, there are a plurality of support columns which are distributed in an isosceles triangle or square array as a whole, and the row spacing and column spacing between adjacent support columns are both set to 5-20 mm.

[0008] Preferably, the support frame is made of sheet material cut in one piece, so that the overall flatness can be better maintained.

[0009] Preferably, the thickness of the support skeleton is 50 μm to 1000 μm.

[0010] Preferably, the sheet is made of PET, polyimide or ceramic.

[0011] Preferably, the sheet is attached to a backing sticker and is integrally formed by laser cutting.

[0012] Preferably, the material of the first adhesive layer and the second adhesive layer is 460 epoxy structural adhesive or vacuum sealant.

[0013] Preferably, the wire mesh electrode uses a stainless steel wire mesh with a tension range of 15-35N.

[0014] In addition, the present invention also provides a preparation tool for the above-mentioned grid gas detector, which includes a screen printing tool, and the screen printing tool is used to apply the curable liquid glue to the corresponding area, so that the first glue layer and the second glue layer can be accurately formed conveniently.

[0015] Preferably, the screen printing tool comprises a tool body; an upwardly open container cavity is formed in the tool body, and the container cavity is used to contain curable liquid glue; the bottom wall of the container cavity has an impermeable anti-seepage area and a permeable area for the curable liquid glue to penetrate, and the shape of the permeable area is consistent with the shape of the supporting frame. Therefore, the convenient operation of brushing the curable liquid glue can be better realized.

[0016] Preferably, the permeable area and the impermeable area are woven with silk threads with a wire diameter of 10-60 μm, a mesh number of 100-700 meshes, and a thickness of 10-100 μm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the structure of the grid gas detector in Examples 1 and 2;

[0018] Figure 2 is a schematic diagram of the back sticker 210 and the support frame 120 in Example 1;

[0019] Figure 3 This is a schematic diagram of the screen printing tooling in Example 3. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Example 1

[0022] See Figure 1-3This embodiment provides a process for manufacturing a microgrid gas detector, which comprises the following steps:

[0023] Step S1, forming a first glue layer 121 by brushing a curable liquid glue on the upper surface of the anode plate 110 corresponding to the support frame 120;

[0024] Step S2, bonding the support frame 120 to the upper surface of the anode plate 110 by applying a first adhesive layer 121;

[0025] Step S3, forming a second glue layer 122 by brushing curable liquid glue on the upper surface of the support frame 120;

[0026] Step S4 , bonding the wire mesh electrode 130 to the upper surface of the support frame 120 through the second adhesive layer 122 .

[0027] Through the above steps S1-S4, it is no longer necessary to form the air gap with a hot melt adhesive film, but the prefabricated support frame 120 can be directly bonded between the anode plate 110 and the wire mesh electrode 130, so the air gap can be formed at low cost and quickly. Another contribution of this process is that the thickness of the support frame 120 can be controlled to achieve flexible adjustment of the air gap, which can achieve rapid preparation of micro-grid gas detectors with various product requirements, and can effectively promote technological innovation and improvement.

[0028] A particularly important point is that since the air gap is constructed by bonding with a curable liquid glue, the material selection of the supporting frame 120 can be more free. For example, low-release materials such as PET, polyimide or ceramic sheets (especially ceramic sheets) can be selected. As a result, the prepared micro-grid gas detector releases less gas during use, thereby promoting the improvement of detection accuracy.

[0029] The support frame 120 has a support frame 221 corresponding to the edge region of the wire mesh electrode 130 and a support column 222 corresponding to the middle region of the wire mesh electrode 130. Therefore, the formation of the air gap can be better facilitated.

[0030] The support frame 120 is made of sheet material and attached to a back sticker 210. This allows the support frames 120 of different heights to be prepared simply and conveniently by selecting sheets of different thicknesses, so that the prepared microgrid gas detector can flexibly adjust the air gap.

[0031] In this embodiment, the back sticker 210 can be made of a low-viscosity protective film. When processing the support frame 120, the sheet can be first adhered to the back sticker 210, and then the required shape can be cut out of the sheet by a laser cutting machine, so that the required shape of the support frame 120 can be obtained. This method can not only conveniently and flexibly adjust the height of the support frame 120, but also better adjust the size of the support frame 221, the size of the support column 222, and the spacing between the components, so it is flexible and convenient.

[0032] In step S2, the support frame 120 is aligned with the first adhesive layer 121 together with the backing sticker 210, and pressure is applied to enable the support frame 120 to be fixed to the anode plate 110 through the first adhesive layer 121. Therefore, the bonding effect between the support frame 120 and the anode plate 110 can be further improved.

[0033] In addition, a flat plate press is used to provide the applied pressure, and a protective layer is provided between the flat plate press and the backing sticker 210. Therefore, the application of pressure can be achieved better.

[0034] In addition, the protective layer includes a first release paper layer, a silicone pad layer and a second release paper layer stacked in sequence, so that the support frame 120 can be better protected.

[0035] In fact, in both steps S2 and S4, pressure can be applied to promote the fixation between the support frame 120 and the anode plate 110, and between the wire mesh electrode 130 and the support frame 120. In this embodiment, during the pressure application process of the flat press, the pressure can be set to be generally not less than 0.5Mpa, and the pressure holding time is not less than 1 hour; the introduction of this method can ensure that the first brush glue layer 121 and the second brush glue layer 122 can be flattened to a substantially uniform thickness, thereby better ensuring that the air gap of the prepared micro-grid gas detector can have a relatively uniform spacing.

[0036] In addition, the material of the support frame 120 is PET, polyimide or ceramic sheet, which is convenient for processing and can maintain the strength of the support frame 120. At the same time, since the preparation process of sheets of such materials is relatively mature, it is possible to better obtain support frames 120 of different heights.

[0037] In addition, the material of the first adhesive layer 121 and the second adhesive layer 122 is 460 epoxy structural adhesive or vacuum sealant, so it is conducive to bonding and curing.

[0038] Before applying the glue, the air in the curable liquid glue can be discharged by vacuuming.

[0039] It is understandable that the curable liquid adhesive made of 460 epoxy structural adhesive or vacuum sealant forms the first adhesive layer 121 or the second adhesive layer 122 after being cured.

[0040] In this embodiment, there are multiple support columns 222 and the overall distribution is in an isosceles triangle or square array, and the row spacing and column spacing between adjacent support columns 222 are set to 5-20 mm; the thickness of the support frame 120 is 50μm to 1000μm; the wire mesh electrode 130 uses a stainless steel wire mesh with a tension range of 15-35N.

[0041] Example 2

[0042] This embodiment provides a grid gas detector, which is prepared by the process of Example 1.

[0043] Among them, at least one air gap structure can be stacked in the thickness direction of the anode plate 110, and the air gap structure includes a support skeleton 120 and a wire mesh electrode 130, and the support skeleton 120 is used to form an air gap.

[0044] That is, through the method of Example 1, the production of a micro-grid gas detector with a multi-air gap structure can be realized, thereby helping to improve the stability and other performance of the detector.

[0045] Example 3

[0046] See Figure 3 This embodiment provides a preparation tool, which includes a screen printing tool 300, which is used to implement the step of brushing the curable liquid glue in Example 1. It can conveniently complete the precise formation of the first brushing glue layer 121 and the second brushing glue layer 122.

[0047] The screen printing tool 300 has a tool body 310; a container cavity 311 opened upward is formed in the tool body 310, and the container cavity 311 is used to contain curable liquid glue; the bottom wall of the container cavity 311 has an impermeable anti-seepage area 312 and a permeable area 313 for the curable liquid glue to penetrate, and the shape of the permeable area 313 is consistent with the shape of the support frame 120. Therefore, the convenient operation of brushing the curable liquid glue can be better realized.

[0048] The permeable area 313 can be realized by setting a mesh, and the control of different glue output amounts can be achieved by setting the mesh size of the mesh and the thickness of the permeable area 313.

[0049] The bottom wall of the container cavity 311 forms a permeable area 313 at the corresponding supporting frame 221 and supporting column 222 .

[0050] In this embodiment, the permeable area 313 and the impermeable area 312 are woven with wires of 10-60 μm in diameter, 100-700 meshes, and 10-100 μm in thickness. The impermeable area 312 can be formed into an impermeable structure by, for example, applying photosensitive adhesive.

[0051] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit 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 of the patent coverage of the present invention.

Claims

1. Microgrid gas detector, characterized by: The invention comprises an anode plate (110) and at least one air gap structure stacked in the thickness direction of the anode plate (110), wherein the air gap structure comprises a support frame (120) and a wire mesh electrode (130), wherein the support frame (120) is used to form an air gap; the support frame (120) and the anode plate (110) or the lower air gap structure are fixedly connected via a first brush glue layer (121), and the support frame (120) and the wire mesh electrode (130) are fixedly connected via a second brush glue layer (122); and both the first brush glue layer (121) and the second brush glue layer (122) are formed by curing a curable liquid glue.

2. The microgrid gas detector according to claim 1, characterized in that: The support skeleton (120) comprises a support frame (221) corresponding to the edge region of the wire mesh electrode (130) and a support column (222) corresponding to the middle region of the wire mesh electrode (130); the support columns (222) are multiple and are distributed in an isosceles triangle or square array as a whole, and the row spacing and column spacing between adjacent support columns (222) are both set to 5-20 mm.

3. The microgrid gas detector according to claim 1, characterized in that: The support frame (120) is made by cutting a sheet material in one piece, and the thickness of the support frame (120) is 50 μm to 1000 μm.

4. The microgrid gas detector according to claim 3, characterized in that: The material of the sheet is PET, polyimide or ceramic.

5. The microgrid gas detector according to claim 3, characterized in that: The sheet is attached to a back sticker (210) and is integrally formed by laser cutting.

6. The microgrid gas detector according to claim 1, characterized in that: The material of the first adhesive layer (121) and the second adhesive layer (122) is 460 epoxy structural adhesive or vacuum sealant.

7. The microgrid gas detector according to claim 1, characterized in that: The wire mesh electrode (130) is made of a stainless steel wire mesh with a tension range of 15-35N.

8. A tooling for preparing a microgrid gas detector according to any one of claims 1 to 7, characterized in that: The invention comprises a screen printing tool (300), wherein the screen printing tool (300) is used for applying curable liquid glue to corresponding areas.

9. The preparation tool according to claim 8, characterized in that: The screen printing tool (300) comprises a tool body (310); a container cavity (311) opening upward is formed in the tool body (310); the container cavity (311) is used to contain curable liquid glue; The bottom wall of the container cavity (311) has an impermeable anti-seepage area (312) and a permeable area (313) for allowing the curable liquid glue to penetrate, and the shape of the permeable area (313) is consistent with the shape of the supporting frame (120).

10. The preparation tool according to claim 9, characterized in that: The permeable area (313) and the impermeable area (312) are both woven with silk threads with a diameter of 10-60 μm, a mesh number of 100-700 meshes, and a thickness of 10-100 μm.

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