Sealed explosion-proof control box capable of inputting

Abstract

The utility model relates to the field of explosion-proof boxes, in particular to an input sealing explosion-proof control box. An input sealed explosion-proof box comprises a closed box body and a box cover, a controller is arranged in the explosion-proof box, the controller is electrically connected with an input system and a display, and the box cover comprises an input area and a display window; the display window is made of a transparent material, and the display is arranged on the inner surface of the display window of the box cover and faces the display window; the input system is arranged in the input area of the box cover and comprises a plurality of keys installed on the outer surface of the box body and an identification circuit board installed on the inner surface of the box body, and the identification circuit board is electrically connected with the controller; the key can move up and down, a magnet is arranged at the bottom of the key, and a magnetic sensitive transistor matched with the magnet is arranged on the identification circuit board. According to the technical scheme, the controller in the explosion-proof box can be controlled without punching holes in the explosion-proof box, and the control program of the controller can be modified.

Description

Technical Field

[0001] The utility model relates to the field of explosion-proof boxes, in particular to an input-sealed explosion-proof control box. Background Art

[0002] Explosion-proof boxes are flameproof equipment enclosures used by electrical equipment in explosive environments. They are often used in underground mines, dusty environments, or environments with flammable gases. Traditional explosion-proof boxes only perform simple controls such as switches, or use wiring connections of electrical components to achieve simple logic controls such as interlocking and self-locking. After this type of explosion-proof box is manufactured and installed, it is generally not considered to be disassembled for upgrading.

[0003] However, as the automation level of electrical equipment becomes higher and higher, the control system in the explosion-proof box also keeps pace with the times, and needs to use programmable logic controller PLC for complex automatic control.

[0004] Because the control logic of PLC is more complex and can be programmed, it is often necessary to reprogram it and upgrade the internal control logic in industry. However, this automation system is installed in a completely sealed explosion-proof box, and it is impossible to input the program into the PLC, making it difficult to upgrade and modify the program. Utility Model Content

[0005] In view of the above-mentioned deficiencies or defects in the prior art, the utility model provides an input-capable sealed explosion-proof box, which can input operations to the control devices in the box and modify the control instructions under the premise that the entire explosion-proof box is sealed, so that the explosion-proof control box can adapt to more complex usage scenarios.

[0006] The invention discloses a sealed explosion-proof box capable of input, comprising a sealed box body and a box cover. A controller is arranged inside the explosion-proof box, the controller is electrically connected with an input system and a display, and the box cover comprises an input area and a display window.

[0007] The display window is made of a transparent material, and the display is arranged on the inner surface of the display window of the box cover and faces the display window.

[0008] The input system is arranged in the input area of ​​the box cover, and the input system includes a plurality of buttons installed on the outer surface of the box body, and an identification circuit board installed on the inner surface of the box body, and the identification circuit board is electrically connected to the controller; the buttons can move up and down and magnets are arranged at the bottom of the buttons, and magnetic sensitive transistors cooperating with the magnets are arranged on the identification circuit board, and the buttons correspond to the magnetic sensitive transistors one by one.

[0009] Preferably, the box cover further includes a magnetic card recognition area, and a magnetic card identifier is installed on the inner surface of the magnetic card recognition area of ​​the box cover, and the magnetic card identifier is electrically connected to the controller.

[0010] Preferably, a window is provided on the upper surface of the box cover, and a transparent cover plate covers the window to form an observation window; and the display is fixed on the inner surface of the cover plate.

[0011] Preferably, the magnetic card reader is installed next to the display on the inner side of the cover plate.

[0012] The upper surface of the box cover is provided with a plug hole, the bottom of the button is provided with a columnar plug post, the button is inserted into the plug hole, and a magnet is fixed at the bottom of the plug post. The magnetic sensitive transistor corresponding to the button on the identification circuit board is located directly below the plug post.

[0013] Preferably, a spring is provided between the bottom of the button and the upper surface of the box cover, and the spring is a compression spring that bounces the button upward.

[0014] Preferably, a fixing plate for fixing the buttons is provided on the box cover, through holes corresponding to the buttons are provided on the fixing plate, the button body is arranged directly below the through hole and the top extends through the through hole to above the through hole. The button has an outwardly protruding flange, which is stuck below the through hole.

[0015] Preferably, the bottom of the box cover is inserted into the box body and is in close contact with the inner surface of the box body side, and the box cover is provided with a flange, and the flange is pressed on the top of the box cover. The flange of the box cover is provided with a fastening bolt, and the fastening bolt fixes the box body and the box cover.

[0016] The application of the above technical solution of the utility model to a sealed explosion-proof box can have the following effects.

[0017] The present application sets a controller inside the box to realize complex control of the circuit. The controller is generally a PLC in industry. The present application sets an input system on the box cover, and the key part of the input system is set outside the box, and the identification circuit of the input system is set inside the box, and then the identification circuit board is directly connected to the controller inside the box to modify the control program of the controller. The box cover remains sealed and no holes are made. Instead, a magnet is set at the bottom of the button, and then the magnetic field of the magnet penetrates the box cover. When the button is pressed, the distance between the magnet and the identification circuit board is closer, the magnetic field strength increases, and the magnetic sensitive transistor on the identified circuit board triggers the threshold of the magnetic sensitive transistor accordingly to turn on the magnetic sensitive transistor. In this way, the box cover can be kept sealed and non-contact input can be performed without punching holes.

[0018] At the same time, the controller also needs a display system for input, so a display window is included on the box cover. The display window position of the box cover is covered with transparent tempered glass.

[0019] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a top view of the appearance of a box body of one embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure inside the box in one embodiment of the utility model;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0023] Description of Reference Numerals

[0024] 1-Box,

[0025] 2-Box cover,

[0026] 3- Controller,

[0027] 4-button,

[0028] 5-Identify the circuit board, 5a-Magnetic sensitive transistor,

[0029] 6- Magnet,

[0030] 7-Magnetic card reader,

[0031] 8- Cover plate,

[0032] 9- Spring,

[0033] 10-Display. DETAILED DESCRIPTION

[0034] The specific implementation of the present invention is described in detail below. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0035] In the present invention, unless otherwise stated, the directional words such as "upper" and "lower" usually refer to the orientation in the assembled state. "Inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0036] The utility model provides an input sealed explosion-proof box, comprising a sealed box body 1 and a box cover 2, wherein a controller 3 is arranged inside the explosion-proof box, the controller 3 is electrically connected to an input system and a display 10, and the box cover 2 comprises an input area and a display window.

[0037] The display window is made of a transparent material, and the display 10 is arranged on the inner surface of the display window of the box cover 2 and faces the display window.

[0038] The input system is arranged in the input area of ​​the box cover 2, and the input system includes a plurality of buttons 4 installed on the outer surface of the box body 1, and an identification circuit board 5 installed on the inner surface of the box body 1, and the identification circuit board 5 is electrically connected to the controller 3; the buttons 4 can move up and down and a magnet 6 is arranged at the bottom of the buttons 4, and a magnetic sensitive transistor 5a cooperating with the magnet 6 is arranged on the identification circuit board 5, and the buttons 4 correspond to the magnetic sensitive transistor 5a one by one.

[0039] The box body 1 and the box cover 2 of the explosion-proof box are prior art, and are generally made of aluminum or engineering plastics. The controller 3 is usually a programmable logic controller 3, that is, a plc, or an embedded control system can also be used. When the input system modifies the control program in the controller 3, the display 10 needs to display a graphical interface to facilitate the operator to observe the program content. Therefore, since the display 10 needs to be directly connected to the controller 3, the display 10 is installed in the box body 1, as shown in the following figure. Figure 2 As shown in: the display 10 is fixed on the inner side of the box cover 2. The box cover 2 above the display 10 can be changed into a transparent material so that the content of the display 10 can be viewed from the outside.

[0040] The upper surface of the box cover 2 is provided with a window, and the window is covered with a transparent cover plate 8 to form an observation window; the display 10 is fixed on the inner surface of the cover plate 8. The material of the cover plate 8 is tempered glass, or high-strength transparent engineering plastic. The magnetic card identifier 7 is installed next to the display 10 on the inner side of the cover plate 8. Therefore, the card identifier can be directly seen from the outside. It is convenient for the operator holding the magnetic card to align the magnetic card with the magnetic card identifier 7.

[0041] Generally, it is necessary to punch a hole in the box body 1 or the box cover 2 to input the controller 3. This makes the processing more difficult. On the other hand, after a long time, the seal is also prone to aging, resulting in poor sealing. This is a fatal hidden danger for the explosion-proof box. Therefore, this application Figure 3 As shown in . A non-contact solution is adopted, and no holes are punched on the box cover 2. The sealing of the explosion-proof box is greatly improved. Specifically, the controller 3 is divided into an identification circuit board 5 installed in the box body 1 and a plurality of buttons 4 outside the box body 1, and the identification circuit board 5 is electrically connected to the controller 3. The button 4 is installed on the outside of the box cover 2, and the shell of the box cover 2 separates the identification circuit board 5 and the button 4. The button 4 moves up and down under human control. When the button 4 moves downward, it will approach the identification circuit board 5. A magnet 6 is installed at the bottom of the button 4, and a magnetic sensitive transistor 5a is installed at the identification circuit board 5 facing the magnet 6. When the button 4 approaches the identification circuit board 5, the magnetic field strength to which the magnetic sensitive transistor 5a is subjected increases, and the magnetic sensitive transistor 5a is set off, thereby recognizing that the button 4 is pressed.

[0042] like Figure 1As shown in the figure, in order to avoid accidental touch of the button 4 or irrelevant personnel modifying the control program of the controller 3. Therefore, the box cover 2 also includes a magnetic card recognition area, and a magnetic card identifier 7 is installed on the inner surface of the magnetic card recognition area of ​​the box cover 2, and the magnetic card identifier 7 is electrically connected to the controller 3. Only a specific magnetic card can be recognized by the magnetic card identifier 7, and at this time, the button 4 can normally modify the control program of the controller 3. Otherwise, the button 4 is in an invalid state, thereby avoiding accidental touch of the button 4 to affect the normal operation of the controller 3.

[0043] like Figure 3 As shown, the upper surface of the box cover 2 has a socket, and the bottom of the button 4 has a columnar plug, which is inserted into the socket, and a magnet 6 is fixed at the bottom of the plug; at the same time, the socket also has a function of restricting the movement direction of the button 4, and the button 4 can only move up and down along the axis of the socket. The magnetic sensitive transistor 5a corresponding to the button 4 on the identification circuit board 5 is located directly below the plug. That is, the magnetic sensitive transistor 5a is set on the axis of the socket.

[0044] A spring 9 is arranged between the bottom of the button 4 and the upper surface of the box cover 2. The spring 9 is a compression spring that bounces the button 4 upward. In order to prevent the button 4 from falling off, a fixing plate for fixing the button 4 is arranged on the box cover 2. Through holes corresponding to the buttons 4 are arranged on the fixing plate. The main body of the button 4 is arranged just below the through hole and the top passes through the through hole and extends to the top of the through hole; the button 4 has a flange protruding outward, and the flange is stuck under the through hole. The fixing plate is fixed to the outer surface of the box cover 2 with bolts.

[0045] In order to improve the sealing performance of the box body 1 and the box cover 2, the bottom of the box cover 2 is inserted into the box body 1 and is tightly attached to the inner surface of the side of the box body 1. The box cover 2 is provided with a flange, and the flange is pressed on the top of the box cover 2. The flange of the box cover 2 is provided with fastening bolts, which fix the box body 1 and the box cover 2.

[0046] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0047] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0048] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An input sealed explosion-proof control box, characterized in that: It comprises a sealed box body (1) and a box cover (2), wherein a controller (3) is arranged in the explosion-proof box, the controller (3) is electrically connected to an input system and a display (10), and the box cover (2) comprises an input area and a display window; The display window is made of a transparent material, and the display (10) is arranged on the inner surface of the display window of the box cover (2) and faces the display window; The input system is arranged in the input area of ​​the box cover (2), and comprises a plurality of keys (4) mounted on the outer surface of the box body (1), and an identification circuit board (5) mounted on the inner surface of the box body (1), wherein the identification circuit board (5) is electrically connected to the controller (3); the keys (4) are capable of moving up and down, and a magnet (6) is arranged at the bottom of the keys (4); a magnetic sensitive transistor (5a) cooperating with the magnet (6) is arranged on the identification circuit board (5), and the keys (4) correspond to the magnetic sensitive transistors (5a) one by one.

2. The inputtable sealed explosion-proof control box according to claim 1, characterized in that: The box cover (2) also includes a magnetic card recognition area. A magnetic card identifier (7) is installed on the inner surface of the magnetic card recognition area of ​​the box cover (2). The magnetic card identifier (7) is electrically connected to the controller (3).

3. The inputtable sealed explosion-proof control box according to claim 2, characterized in that: A window is provided on the upper surface of the box cover (2), and a transparent cover plate (8) covers the window to form an observation window; The display (10) is fixed on the inner surface of the cover plate (8).

4. The inputtable sealed explosion-proof control box according to claim 3, characterized in that: The magnetic card identifier (7) is installed next to the display (10) on the inner side of the cover plate (8).

5. The importable sealed explosion-proof control box according to claim 1, characterized in that: The upper surface of the box cover (2) is provided with a socket, the bottom of the button (4) is provided with a columnar plug, the plug is inserted into the socket, and a magnet (6) is fixed to the bottom of the plug; The magnetic sensitive transistor (5a) corresponding to the key (4) on the identification circuit board (5) is located directly below the plug post.

6. The importable sealed explosion-proof control box according to claim 5, characterized in that: A spring (9) is provided between the bottom of the button (4) and the upper surface of the box cover (2); the spring (9) is a compression spring that bounces the button (4) upward.

7. The importable sealed explosion-proof control box according to claim 6, characterized in that: The box cover (2) is provided with a fixing plate for fixing the button (4), the fixing plate is provided with through holes corresponding to the buttons (4) one by one, the button (4) body is arranged directly below the through hole and the top part passes through the through hole and extends to above the through hole; The button (4) is provided with a flange protruding outwards, and the flange is stuck under the through hole.

8. The importable sealed explosion-proof control box according to claim 1, characterized in that: The bottom of the box cover (2) is inserted into the box body (1) and is in close contact with the inner surface of the side of the box body (1); the box cover (2) is provided with a flange, and the flange is pressed against the top of the box cover (2); A fastening bolt is provided on the flange of the box cover (2), and the fastening bolt fixes the box body (1) and the box cover (2).

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