Anti-condensation observation window of mechanism box

Abstract

The invention relates to a mechanism case anti-condensation observation window which comprises an inner layer, a middle layer and an outer layer which are sequentially distributed, the inner layer and the outer layer are tempered glass layers, the middle layer is an air isolation layer, the thickness of the inner layer is the same as that of the outer layer, and the thickness of the middle layer is 3 / 5-4 / 5 of that of the inner layer or the outer layer. According to the observation window, a combined structure of the inner tempered glass layer, the middle air isolation layer and the outer tempered glass layer is adopted, a good isolation effect can be achieved on the inner space and the outer space of the mechanism box, the condensation phenomenon is effectively avoided, and the observation window can be particularly suitable for some areas with high humidity.

Description

Technical Field

[0001] The invention relates to the field of switch electrical appliances, and in particular to an anti-condensation observation window for a mechanism box. Background Art

[0002] Switchgear refers to electrical equipment that can connect and disconnect circuits, mainly including circuit breakers and disconnectors. Circuit breakers are mainly used to protect circuits and equipment. When the circuit is overloaded or short-circuited, the circuit breaker will automatically cut off the circuit to prevent accidents. It is suitable for high-voltage systems and has automatic or manual operation functions. Circuit breakers are mainly composed of the following parts: contact system, arc extinguishing system, operating mechanism and protection device. In the design of the operating mechanism of the circuit breaker, the various operating components are usually gathered in a mechanism box so that personnel can perform unified operations. At the same time, in order to facilitate personnel to observe the operation status in the mechanism box, an observation window will be added to the mechanism box to facilitate personnel's observation. At present, the observation windows on the existing mechanism boxes are mostly ordinary single-layer glass structures, and the general mechanism boxes are closed equipment, which easily leads to condensation on the surface of the observation window. Condensation will cause the equipment parts in the mechanism box to become damp and aggravate corrosion, and affect the observation of the equipment operation status through the observation window. The corrosion of the movement parts will seriously threaten the safe operation of electrical equipment. In addition, the circuit breaker itself is a high-voltage switch. During operation, it is inevitable that the temperature in the mechanism box will be higher than the outside temperature, which makes condensation more likely to occur. Therefore, it is particularly important to solve the condensation problem or reduce the risks brought by condensation. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an anti-condensation observation window for a mechanism box which can effectively prevent condensation from occurring on the observation window.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: an anti-condensation observation window for a mechanism box, the innovation of which is that it comprises an inner layer, a middle layer and an outer layer distributed in sequence, wherein the inner layer and the outer layer are both tempered glass layers, the middle layer is an air isolation layer, and the thickness of the inner layer is the same as that of the outer layer, and the thickness of the middle layer is 3 / 5-4 / 5 of the thickness of the inner layer or the outer layer.

[0005] Furthermore, the air isolation layer is filled with dry air.

[0006] Furthermore, the connection between the inner layer and the outer layer is as follows: a connecting protrusion extending toward the outer layer is provided on the side of the inner layer close to the outer layer, and the connecting protrusion extends along the outer contour of the inner layer, and a positioning groove matching the connecting protrusion is provided on the side of the outer layer close to the inner layer. Similarly, the positioning groove extends along the outer contour of the outer layer, and the length of the connecting protrusion is the sum of the thickness of the middle layer and the depth of the positioning groove, and the contact between the connecting protrusion and the positioning groove is fixed by gluing.

[0007] Furthermore, the preparation method of the observation window comprises the following steps: S1: First, ordinary float glass with a thickness of 2 to 4 mm is selected and processed into the required length dimensions of the inner layer and the outer layer through cutting, edge grinding, cleaning, and physical tempering processes to form the inner layer initial plate and the outer layer initial plate; S2: Then, aluminum alloy or stainless steel with various textures and a thickness of 0.3 to 0.5 mm is selected, and the metal plates with a length dimension 1 mm smaller than the length dimension of the inner layer initial plate or the outer layer initial plate are finely ground by stamping and CNC machine tools. There are two metal plates in total, which correspond to the inner layer initial plate and the outer layer initial plate one by one; S3: cleaning the glass pre-processed in step S1 and the metal plate pre-processed in step S2, and bonding and pre-pressing the two metal plates to the inner primary plate and the outer primary plate in a one-to-one correspondence manner to form an inner glass plate and an outer glass plate respectively after cleaning; S4: Put the inner glass plate and the outer glass plate into the autoclave equipment, and use the autoclave equipment to press the inner glass plate and the outer glass plate again at high temperature and high pressure to completely eliminate the bubbles between the metal plate and the glass. The temperature of the autoclave equipment is 135-140°C, and the temperature and pressure are maintained in three stages: the first stage: pressure maintenance: 0.8 Mpa, insulation time: 10±2 minutes, the second stage: pressure maintenance: 1.0 Mpa, insulation time: 20±3 minutes, the third stage: pressure maintenance: 1.2 Mpa, insulation time: 60±5 minutes, and then exhaust to normal pressure, cool down to 45°C to produce the product; S5: After taking out the inner glass plate and the outer glass plate from the autoclave equipment, use a blade to trim or a grinding wheel to grind the inner glass plate and the outer glass plate so that the edges of the inner glass plate and the outer glass plate have the same transparent appearance, which are the inner and outer layers required for the observation window; S6: Finally, the inner layer and the outer layer are bonded by gluing. When the inner layer and the outer layer are bonded, a gap required for the middle layer is left between the inner layer and the outer layer. After gluing, dry air is injected into the middle layer from the glue layer position to form the required observation window.

[0008] Furthermore, the bonding pre-pressing and laminating process in step S3 is: using OCA double-sided adhesive to bond the metal plate to the inner layer initial plate or the outer layer initial plate, and then laminating the three by a laminating machine, the laminating temperature is room temperature, and the laminating speed is 1 to 3 m / M.

[0009] Furthermore, the bonding pre-pressing and laminating process in step S3 is as follows: PVB adhesive with a film thickness of 0.38 or 0.76 mm is used to bond the metal plate to the inner layer initial plate or the outer layer initial plate, and then the three are pressed together by a pressing machine, the pressing temperature is 115-125°C, and the pressing speed is 1-2 m / M.

[0010] The advantages of the present invention are: the observation window of the present invention adopts a combined structure of an inner tempered glass layer, a middle air isolation layer and an outer tempered glass layer, which can play a good role in isolating the inner and outer spaces of the mechanism box, effectively avoiding the occurrence of condensation, and is especially suitable for some areas with high humidity.

[0011] The connection between the inner layer and the outer layer is achieved by the cooperation of the connecting protrusion and the positioning groove, so that the positioning limit of the inner layer and the outer layer can be realized, avoiding the relative displacement and movement between the inner layer and the outer layer during use. In addition, by controlling the size of the connecting protrusion and the positioning groove, the middle layer can be directly formed.

[0012] When the observation window in the present invention is prepared, the inner or outer glass plate produced by the process can reflect the texture and have extremely high weather resistance by covering the outer side of the tempered glass plate with a layer of metal texture plate, thereby making the product quality stable; in addition, the input-output ratio is high and the product cost of the process is low, and no new equipment development is required.

[0013] The pre-pressing and laminating process of bonding metal plate and glass can be realized by two methods: pre-pressing and laminating with OCA double-sided adhesive and pre-pressing and laminating with PVB adhesive, which makes the pre-pressing and laminating process of bonding metal plate and glass more selective. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the anti-condensation observation window of the mechanism box of the present invention. DETAILED DESCRIPTION

[0015] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0016] like Figure 1The anti-condensation observation window of a mechanism box shown in the figure includes an inner layer 1, a middle layer 2 and an outer layer 3 which are distributed in sequence, wherein the inner layer 1 and the outer layer 3 are both tempered glass layers, the middle layer 2 is an air isolation layer, and the air isolation layer is filled with dry air. By filling the air with dry air, condensation due to temperature reasons on the observation window itself is avoided. The thickness of the inner layer 1 is the same as that of the outer layer 3, and the thickness of the middle layer 2 is 3 / 5-4 / 5 of the thickness of the inner layer 1 or the outer layer 3.

[0017] The inner layer 1 and the outer layer 3 are both rectangular in shape, and the connection between the inner layer 1 and the outer layer 3 is as follows: a connecting protrusion 4 extending toward the outer layer 3 is provided on the side of the inner layer 1 close to the outer layer 3, and the connecting protrusion 4 extends along the outer contour of the inner layer, so that the entire connecting protrusion 4 forms a U-shaped structure, and a positioning groove matching the connecting protrusion 4 is provided on the side of the outer layer 3 close to the inner layer 1. Similarly, the positioning groove extends along the outer contour of the outer layer, and the positioning groove is also in the shape of a U-shaped structure. The length of the connecting protrusion 4 is the sum of the thickness of the middle layer 2 and the depth of the positioning groove, and the contact between the connecting protrusion 4 and the positioning groove is fixed by gluing. The connection between the inner layer 1 and the outer layer 3 is achieved by the cooperation of the connecting protrusion 4 and the positioning groove, so that the positioning restriction of the inner layer 1 and the outer layer 3 can be realized, and relative displacement and movement between the inner layer 1 and the outer layer 3 during use are avoided. In addition, by controlling the size of the connecting protrusion 4 and the positioning groove, the middle layer 2 can be directly formed, and there is no need to process the side of the inner layer 1 or the outer layer 3 to form the middle layer 2, which facilitates subsequent processing.

[0018] The above-mentioned method for preparing the observation window is achieved by the following steps: S1: First, ordinary float glass with a thickness of 2 to 4 mm is selected, and processed into the required inner and outer layer lengths through cutting, edge grinding, cleaning, and physical tempering processes to form an inner layer initial plate and an outer layer initial plate, and the required connecting protrusions 4 are processed on the inner layer initial plate, and the required positioning grooves are processed on the outer layer initial plate.

[0019] S2: Then, aluminum alloy or stainless steel with various textures and a thickness of 0.3 to 0.5 mm is selected, and the metal plates with a length dimension 1 mm smaller than the length dimension of the inner layer initial plate or the outer layer initial plate are finely ground by stamping and CNC machine tools. There are two metal plates in total, which correspond to the inner layer initial plate and the outer layer initial plate one by one.

[0020] S3: Clean the glass pre-processed in step S1 and the metal plate pre-processed in step S2, and after cleaning, bond and pre-press the two metal plates to the inner primary plate and the outer primary plate one by one to form an inner glass plate and an outer glass plate, respectively, and the metal plates are connected to the side of the inner primary plate away from the outer primary plate, or the side of the outer primary plate away from the inner primary plate.

[0021] In the above steps, there are two ways of bonding pre-pressing and laminating treatment. The first way is: use OCA double-sided tape to bond the metal plate to the inner layer initial plate or the outer layer initial plate, and then press the three together through a laminating machine. The laminating temperature is room temperature and the laminating speed is 1 to 3 m / M. The second way is: use PVB tape with a film thickness of 0.38 or 0.76 mm to bond the metal plate to the inner layer initial plate or the outer layer initial plate, and then press the three together through a laminating machine. The laminating temperature is 115 to 125°C and the laminating speed is 1 to 2 m / M.

[0022] S4: Put the inner glass plate and the outer glass plate into the autoclave equipment, and use the autoclave equipment to press the inner glass plate and the outer glass plate again at high temperature and high pressure to completely eliminate the bubbles between the metal plate and the glass. The temperature of the autoclave equipment is 135-140°C, and the temperature and pressure are maintained in three stages; the first stage: pressure maintenance: 0.8 Mpa, insulation time: 10±2 minutes, the second stage: pressure maintenance: 1.0 Mpa, insulation time: 20±3 minutes, the third stage: pressure maintenance: 1.2 Mpa, insulation time: 60±5 minutes, and then exhaust to normal pressure, cool down to 45°C to produce the product.

[0023] S5: After taking out the inner glass plate and the outer glass plate from the autoclave equipment, use a blade to trim or a grinding wheel to grind the inner glass plate and the outer glass plate so that the edges of the inner glass plate and the outer glass plate have the same transparent appearance, which are the inner layer 1 and the outer layer 3 required for the observation window.

[0024] S6: Finally, the positioning protrusion 4 of the inner layer 1 is aligned with the positioning groove of the outer layer 3 to achieve preliminary positioning and fixation of the inner layer 1 and the outer layer 3. At this time, the space required for the middle layer 2 has flowed out, and then the inner layer 1 and the outer layer 3 are bonded by gluing. After the inner layer 1 and the outer layer 3 are bonded, dry air is injected into the middle layer 2 from the glue layer position to form the required observation window.

[0025] When the observation window in the present invention is prepared, the inner or outer glass plate produced by the process can reflect the texture and have extremely high weather resistance by covering the outer side of the tempered glass plate with a layer of metal texture plate, thereby making the product quality stable; in addition, the input-output ratio is high and the product cost of the process is low, and no new equipment development is required.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A mechanism box anti-condensation observation window, characterized in that: It includes an inner layer, a middle layer and an outer layer which are distributed in sequence, wherein the inner layer and the outer layer are both tempered glass layers, the middle layer is an air isolation layer, and the thickness of the inner layer is the same as that of the outer layer, and the thickness of the middle layer is 3 / 5-4 / 5 of the thickness of the inner layer or the outer layer.

2. The mechanism box anti-condensation observation window according to claim 1, characterized in that: The air isolation layer is filled with dry air.

3. The mechanism box anti-condensation observation window according to claim 1, characterized in that: The connection between the inner layer and the outer layer is as follows: a connecting protrusion extending toward the outer layer is provided on the side of the inner layer close to the outer layer, and the connecting protrusion extends along the outer contour of the inner layer, and a positioning groove matching the connecting protrusion is provided on the side of the outer layer close to the inner layer. Similarly, the positioning groove extends along the outer contour of the outer layer, and the length of the connecting protrusion is the sum of the thickness of the middle layer and the depth of the positioning groove. The contact between the connecting protrusion and the positioning groove is fixed by gluing.

4. The mechanism box anti-condensation observation window according to claim 1, characterized in that: The preparation method of the observation window comprises the following steps: S1: First, ordinary float glass with a thickness of 2 to 4 mm is selected and processed into the required length dimensions of the inner layer and the outer layer through cutting, edge grinding, cleaning, and physical tempering processes to form the inner layer initial plate and the outer layer initial plate; S2: Then, aluminum alloy or stainless steel with various textures and a thickness of 0.3 to 0.5 mm is selected, and the metal plates with a length dimension 1 mm smaller than the length dimension of the inner layer initial plate or the outer layer initial plate are finely ground by stamping and CNC machine tools. There are two metal plates in total, which correspond to the inner layer initial plate and the outer layer initial plate one by one; S3: cleaning the glass pre-processed in step S1 and the metal plate pre-processed in step S2, and bonding and pre-pressing the two metal plates to the inner primary plate and the outer primary plate in a one-to-one correspondence manner to form an inner glass plate and an outer glass plate respectively after cleaning; S4: Put the inner glass plate and the outer glass plate into the autoclave equipment, and use the autoclave equipment to press the inner glass plate and the outer glass plate again at high temperature and high pressure to completely eliminate the bubbles between the metal plate and the glass. The temperature of the autoclave equipment is 135-140°C, and the temperature and pressure are maintained in three stages: the first stage: pressure maintenance: 0.8 Mpa, insulation time: 10±2 minutes, the second stage: pressure maintenance: 1.0 Mpa, insulation time: 20±3 minutes, the third stage: pressure maintenance: 1.2 Mpa, insulation time: 60±5 minutes, and then exhaust to normal pressure, cool down to 45°C to produce the product; S5: After taking out the inner glass plate and the outer glass plate from the autoclave equipment, use a blade to trim or a grinding wheel to grind the inner glass plate and the outer glass plate so that the edges of the inner glass plate and the outer glass plate have the same transparent appearance, which are the inner and outer layers required for the observation window; S6: Finally, the inner layer and the outer layer are bonded by gluing. When the inner layer and the outer layer are bonded, a gap required for the middle layer is left between the inner layer and the outer layer. After gluing, dry air is injected into the middle layer from the glue layer position to form the required observation window.

5. The mechanism box anti-condensation observation window according to claim 4, characterized in that: The bonding pre-pressing and laminating process in step S3 is as follows: using OCA double-sided adhesive to bond the metal plate to the inner layer initial plate or the outer layer initial plate, and then laminating the three by a laminating machine, with the laminating temperature being room temperature and the laminating speed being 1 to 3 m / M.

6. The mechanism box anti-condensation observation window according to claim 4, characterized in that: The bonding pre-pressing and laminating process in step S3 is as follows: PVB adhesive with a film thickness of 0.38 or 0.76 mm is used to bond the metal plate to the inner layer initial plate or the outer layer initial plate, and then the three are pressed together by a pressing machine, the pressing temperature is 115-125° C., and the pressing speed is 1-2 m / M.

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