Explosion-proof observation window with electrostatic shielding effect

Abstract

The utility model discloses an explosion-proof observation window with electrostatic shielding effect, which comprises a base and a pressing frame, the base is internally provided with a mounting groove for embedding an observation panel, the center of the mounting groove is provided with an observation port, the observation panel comprises a double-layer glass layer, the glass layer comprises toughened glass covered with a PET (polyethylene terephthalate) film, and the pressing frame is provided with an electrostatic shielding layer. A transparent pressure-resistant layer is arranged between every two adjacent glass layers, a metal net is arranged in the pressing frame, and the pressing frame is connected with a threaded groove in the base through a fastener. According to the utility model, compared with the prior art, the observation panel is arranged, the PET film stretched due to explosion pressure forms a barrier for glass fragments in the observation window, the glass fragments are prevented from diffusing out of the cabinet body, the safety is effectively improved, the transparent pressure-resistant layer is arranged and matched with the buffer blocks to provide elastic support for the four corners of the toughened glass, the damping effect is achieved, and the service life of the toughened glass is prolonged. The four corners of the tempered glass are effectively prevented from being broken, and the explosion-proof performance of the tempered

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof observation windows, in particular to an explosion-proof observation window with electrostatic shielding effect. Background Art

[0002] Most electrical cabinets are equipped with observation windows so that staff can observe the internal operation from the outside of the cabinet. The existing patent (Announcement No.: CN217080213U) discloses a new type of explosion-proof observation window for substation switch cabinets. This utility model improves the explosion-proof performance of the observation window and greatly improves safety by setting tempered glass and using high-strength aluminum alloy, and installing rubber pads on the tempered glass. It also achieves the effect of electrostatic shielding by installing shielding wire mesh and shielding wire. However, in actual applications, when the tempered glass is broken, relying on the shielding wire mesh, it is still impossible to effectively prevent the tendency of the broken glass to splash outward under the shock wave, and the safety still needs to be improved. To this end, we propose an explosion-proof observation window with electrostatic shielding effect. Utility Model Content

[0003] In order to solve the above problems, the utility model provides an explosion-proof observation window with electrostatic shielding effect.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An explosion-proof observation window with an electrostatic shielding effect is designed, comprising a base and a pressing frame, wherein the base is provided with a mounting groove for embedding an observation panel, an observation port is opened at the center of the mounting groove, the observation panel comprises a double-layer glass layer, the glass layer comprises tempered glass covered with a PET film, a transparent pressure-resistant layer is provided between adjacent glass layers, a metal mesh is provided in the pressing frame, and the pressing frame is connected to a threaded groove on the base through a fastener.

[0006] In the above solution, the transparent pressure-resistant layer comprises an acrylic plate of the same size as the tempered glass, and the surface of the acrylic plate is covered with a flame-retardant film.

[0007] In the above solution, buffer blocks are fixed at the four corners of the acrylic plate and abut against the four corners of the tempered glass, and the buffer blocks are made of rubber.

[0008] In the above solution, a pressure relief channel is provided between the base and the pressing frame, and a side of the pressing frame away from the observation panel is covered with a waterproof and breathable layer.

[0009] In the above solution, the pressure relief channel includes a pressure relief hole penetrating the pressure frame and an exhaust hole penetrating the base, and the pressure relief hole and the exhaust hole correspond to each other one by one.

[0010] In the above solution, both sides of the transparent pressure-resistant layer are fixedly connected to the glass layer respectively.

[0011] In the above scheme, a limiting member is provided in the installation groove, and the limiting member is pressed against the upper surface of the glass layer close to the observation port. A rotating groove for accommodating the limiting member is provided on the inner wall of the installation groove, and the limiting member is movably connected to the rotating groove.

[0012] In the above scheme, the limiter comprises a rotating plate connected to the inner wall of the rotating groove through a damping shaft, a pressure plate is fixed to the other end of the rotating plate, the pressure plate is made of rubber, and a rotating handle passing through the base is fixed to the top end of the damping shaft.

[0013] The advantages and beneficial effects of the utility model are as follows: by setting an observation panel, utilizing a double-layer glass layer, and increasing a structural layer, the strength and explosion-proof performance of the observation panel are improved; at the same time, the PET film covering the tempered glass is used to utilize the excellent tensile properties and impact resistance of the PET film to prevent the fragments of the tempered glass generated by the explosion from splashing out of the observation window; compared with the prior art, the PET film stretched by the explosion pressure forms a barrier for glass fragments in the observation window to prevent the glass fragments from diffusing out of the cabinet body, thereby effectively improving safety; by setting a transparent pressure-resistant layer and utilizing an acrylic plate as a supporting layer to provide support for the two glass layers at the same time, and in combination with a buffer block to provide elastic support for the four corners of the tempered glass, a shock-absorbing effect is achieved, the four corners of the tempered glass are effectively prevented from being shattered, and the explosion-proof performance of the tempered glass is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 This is a front view of an explosion-proof observation window with electrostatic shielding effect proposed by the utility model;

[0016] Figure 2 This is a back view of an explosion-proof observation window with electrostatic shielding effect proposed by the utility model;

[0017] Figure 3 This is a structural schematic diagram of an observation panel of an explosion-proof observation window with electrostatic shielding effect proposed by the utility model;

[0018] Figure 4 The utility model is a top-sectional view of the base of an explosion-proof observation window with electrostatic shielding effect.

[0019] In the figure: base 1, pressing frame 2, mounting groove 3, observation port 4, observation panel 5, glass layer 6, tempered glass 61, PET film 62, transparent pressure-resistant layer 7, acrylic plate 71, flame-retardant film 72, buffer block 8, metal mesh 9, fastener 10, thread groove 11, exhaust hole 12, pressure relief hole 13, rotating groove 14, rotating plate 15, damping shaft 16, pressing plate 17, and rotating handle 18. DETAILED DESCRIPTION

[0020] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0021] See also Figure 1-4 The utility model provides a technical solution: an explosion-proof observation window with electrostatic shielding effect, comprising a base 1 and a pressing frame 2, wherein a mounting groove 3 for embedding an observation panel 5 is provided in the base 1, and an observation port 4 is provided in the center of the mounting groove 3, through which a staff member observes the working conditions inside the cabinet, and the observation panel 5 comprises a double-layer glass layer 6, and the glass layer 6 comprises a tempered glass 61 covered with a PET film 62;

[0022] Specifically, by providing an observation panel 5 and utilizing a double-layer glass layer 6, by increasing the structural layer, the strength and explosion-proof performance of the observation panel 5 are improved. At the same time, the PET film 62 covering the tempered glass 61 is used, and the excellent tensile properties and impact resistance of the PET film 62 are utilized to prevent the fragments of the tempered glass 61 generated by the explosion from splashing out of the observation window. Compared with the prior art, the PET film 62 stretched by the explosion pressure forms a barrier to glass fragments in the observation window, thereby preventing glass fragments from spreading outside the cabinet, thereby effectively improving safety.

[0023] A transparent pressure-resistant layer 7 is provided between adjacent glass layers 6;

[0024] Furthermore, the transparent pressure-resistant layer 7 includes an acrylic plate 71 of the same size as the tempered glass 61, and the surface of the acrylic plate 71 is covered with a flame-retardant film 72 to prevent the acrylic plate 71 from being ignited during an explosion. Since the acrylic plate 7 has good tensile and bending properties, under the huge shock wave generated by the explosion, the acrylic plate 7 can effectively buffer the impact by deforming itself, thereby reducing the pressure brought to the glass layer 6 by the impact force.

[0025] Furthermore, the four corners of the acrylic plate 71 are fixed with buffer blocks 8 that abut against the four corners of the tempered glass 61. The buffer blocks 8 are made of rubber. Since the four corners are the most vulnerable parts of the tempered glass 61, the buffer blocks 8 are provided to buffer the impact force of the explosion on the four corners of the tempered glass 61, which can effectively prevent the tempered glass 61 from breaking and improve the explosion-proof performance of the tempered glass 61.

[0026] Specifically, by providing a transparent pressure-resistant layer 7 and utilizing an acrylic plate 71 as a supporting layer, support is provided for the two glass layers 6 at the same time, and in conjunction with a buffer block 8, elastic support is provided to the four corners of the tempered glass 61 to achieve a shock-absorbing effect, effectively preventing the four corners of the tempered glass 61 from breaking, and improving the explosion-proof performance of the tempered glass 61.

[0027] A metal mesh 9 is provided inside the pressing frame 2 to achieve the effect of shielding static electricity, and the pressing frame 2 is connected to the threaded groove 11 on the base 1 through a fastener; the inner wall of the pressing frame 2 directly abuts against the tempered glass 61 on the side away from the base 1, so that the observation panel 5 is tightly pressed into the base 1 as a whole;

[0028] Furthermore, a pressure relief channel is provided between the base 1 and the pressing frame 2, and a waterproof and breathable layer is covered on the side of the pressing frame 2 away from the observation panel 5; when an explosion occurs, the waterproof and breathable layer is used to guide the airflow generated at the moment of the explosion into the pressure relief channel and then discharge it from the cabinet, thereby reducing the impact of the explosion on the observation panel 5 and effectively preventing the glass layer 6 from breaking;

[0029] Furthermore, the pressure relief channel includes a pressure relief hole 13 penetrating the pressure frame 2 and an exhaust hole 12 penetrating the base 1, and the pressure relief hole 13 and the exhaust hole 12 correspond one to one; the explosion impact airflow passes through the waterproof and breathable layer, passes through the pressure relief hole 13 and the exhaust hole 12 in turn, and is finally discharged.

[0030] Furthermore, both sides of the transparent pressure-resistant layer 7 are fixedly connected to the glass layer 6 , respectively, which makes it easier for installers to carry out overall installation and saves installation time.

[0031] Furthermore, a stopper is provided in the installation groove 3, and the stopper is pressed against the upper surface of the glass layer 6 near the observation port 4. A rotating groove 14 for accommodating the stopper is provided on the inner wall of the installation groove 3, and the stopper is movably connected to the rotating groove 14.

[0032] Specifically, the transparent pressure-resistant layer 7 and the glass layer 6 are installed separately one by one. After a piece of glass layer 6 is embedded in the installation groove 3, the limiting piece is rotated to move the limiting piece out of the rotating groove 14 and press on the glass layer 6, so that the glass layer 6 is tightly pressed into the installation groove 3, and then the transparent pressure-resistant layer 7 and another layer of glass layer 6 are embedded, and finally the pressing frame 2 cover is placed on the outermost glass layer 6.

[0033] Further, the stopper includes a rotating plate 15 connected to the inner wall of the rotating groove 14 through a damping rotating shaft 16, the damping rotating shaft 16 is fixed to the rotating plate 15, a pressing plate 17 is fixed to the other end of the rotating plate 15, the pressing plate 17 is made of rubber, and a rotating handle 18 passing through the base 1 is fixed to the top end of the damping rotating shaft 16;

[0034] Specifically, by rotating the rotary handle 18, the rotating plate 15 drives the pressing plate 17 to move out of the rotating groove 14 and press on the glass layer 6, which is convenient for the installation personnel to operate.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An explosion-proof observation window with electrostatic shielding effect, comprising a base (1) and a pressing frame (2), characterized in that: The base (1) is provided with a mounting groove (3) for embedding an observation panel (5), the center of the mounting groove (3) is provided with an observation port (4), the observation panel (5) comprises a double glass layer (6), the glass layer (6) comprises tempered glass (61) covered with a PET film (62), a transparent pressure-resistant layer (7) is provided between adjacent glass layers (6), a metal mesh (9) is provided in the pressing frame (2), and the pressing frame (2) is connected to a threaded groove (11) on the base (1) via a fastener.

2. The explosion-proof observation window with electrostatic shielding effect according to claim 1, characterized in that: The transparent pressure-resistant layer (7) comprises an acrylic plate (71) of the same size as the tempered glass (61), and the surface of the acrylic plate (71) is covered with a flame-retardant film (72).

3. The explosion-proof observation window with electrostatic shielding effect according to claim 2, characterized in that: Buffer blocks (8) are fixed at the four corners of the acrylic plate (71) and are in contact with the four corners of the tempered glass (61). The buffer blocks (8) are made of rubber.

4. The explosion-proof observation window with electrostatic shielding effect according to claim 1, characterized in that: A pressure relief channel is provided between the base (1) and the pressing frame (2), and a side of the pressing frame (2) away from the observation panel (5) is covered with a waterproof and breathable layer.

5. The explosion-proof observation window with electrostatic shielding effect according to claim 4, characterized in that: The pressure relief channel comprises a pressure relief hole (13) penetrating the pressure frame (2) and an exhaust hole (12) penetrating the base (1), and the pressure relief hole (13) and the exhaust hole (12) correspond one to one.

6. The explosion-proof observation window with electrostatic shielding effect according to claim 1, characterized in that: Both sides of the transparent pressure-resistant layer (7) are fixedly connected to the glass layer (6) respectively.

7. The explosion-proof observation window with electrostatic shielding effect according to claim 1, characterized in that: A limiting member is provided in the installation groove (3), and the limiting member is pressed against the upper surface of the glass layer (6) on the side close to the observation port (4). A rotating groove (14) for accommodating the limiting member is provided on the inner wall of the installation groove (3), and the limiting member is movably connected to the rotating groove (14).

8. The explosion-proof observation window with electrostatic shielding effect according to claim 7, characterized in that: The limiting member comprises a rotating plate (15) connected to the inner wall of the rotating groove (14) via a damping rotating shaft (16); a pressing plate (17) is fixed to the other end of the rotating plate (15); the pressing plate (17) is made of rubber; and a rotating handle (18) passing through the base (1) is fixed to the top end of the damping rotating shaft (16).

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