Mining flame-proof and intrinsic safety type power-off feeder

Abstract

The utility model discloses a mining flame-proof and intrinsic safety type power-off feeder, which relates to the technical field of power-off feeders, and comprises a shell, an upper cover, a wiring board, a display board, a mainboard and a transformer, the shell is provided with internal and external grounding terminals and a wiring port, the mainboard, the wiring board, the display board and the transformer, the upper cover and the shell are connected together through a connecting shaft, and the upper cover and the shell are connected through a connecting shaft. The mainboard is provided with a feed input signal processing circuit, a power-off control circuit, an RS485 communication circuit and an information processing unit, the feed input signal processing circuit is provided with an accessory circuit for distinguishing feed input voltage levels, and the display panel is provided with a nixie tube display circuit and an infrared signal receiving circuit. The device has the advantages of wide feed input detection range, capability of detecting the feed voltage level, and convenience and reliability in use.

Description

Technical Field

[0001] The utility model relates to the technical field of mine-used power-off feeders, in particular to a mine-used flameproof and intrinsically safe power-off feeder. Background Art

[0002] With the rapid development of the coal mining industry in recent years, the safety issues of coal mine production have received increasing attention from the state and society. Power feeders are mainly used for remote power-off control and power-feed detection of controlled equipment underground in coal mines. The functions of mine-use power feeders currently on the market are relatively simple, often unable to simultaneously meet the power-feed function and multi-voltage detection function. Moreover, after installation, it is impossible to determine whether the power-off control is working in the normally open or normally closed state through the power feeder display status, and there may be limitations in the communication method. As the requirements for electrical equipment in coal mine operations continue to increase, there is a need for a mine-use power feeder that can not only achieve reliable power-off protection and indicate the power-off working mode, but also accurately detect the feed voltage and have good communication functions. Summary of the Invention

[0003] The purpose of the utility model is to overcome the above-mentioned problems of the prior art and provide a flameproof and intrinsically safe power feeder for mining, which can specifically detect whether the power feed is a specific voltage of 127V / 660V / 1140V and can transmit it to other devices through RS485. The power feeder can be set to normally open / normally closed mode, and the current working mode can be intuitively understood through the display panel, thereby enhancing the convenience and reliability of use.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a flameproof and intrinsically safe power feeder for mining, comprising: a shell, an upper cover, a terminal block, a display panel, a main board and a transformer, characterized in that a support plate is provided inside the shell, the main board is mounted on the support plate, the transformer is mounted on the bottom of the shell, the display panel is mounted on the terminal block, the terminal block is mounted on the support plate, a large wiring port and a small wiring port are provided on the shell, an internal grounding terminal and an external grounding terminal are provided inside the shell, a fixing hole is provided at the bottom of the shell, tempered glass is mounted on the upper cover, and the shell and the upper cover are mounted together through a connecting shaft.

[0005] Furthermore, the mainboard is provided with a feed input signal processing circuit, a power-off control circuit, an RS485 communication circuit, and an information processing unit.

[0006] Furthermore, the transformer 7 converts the high voltage of the feed input into a low voltage signal, which is then connected to the mainboard 6 .

[0007] Furthermore, the power feed input signal processing circuit is provided with an auxiliary circuit for detecting the power feed input voltage level, which can automatically detect whether the power feed voltage is a specific voltage among 127V / 660V / 1140V.

[0008] Furthermore, the RS485 communication circuit serves as a signal communication interface of the power-off feeder, receiving control instructions from external devices and transmitting its own status information.

[0009] Furthermore, the power-off control unit can set a normally open / normally closed working mode and can display the current working mode on the display panel.

[0010] Furthermore, the display panel 5 is provided with a digital tube driving circuit and an infrared signal receiving circuit.

[0011] Furthermore, the upper cover and the shell are connected by a connecting shaft, and the cover can be easily opened after removing the fastening screws.

[0012] Furthermore, the shell 1 and the upper cover 2 are made of Q235B, and are flameproof shells.

[0013] Furthermore, the upper cover is provided with tempered glass as a display window.

[0014] Furthermore, the power-off feeder uses a flameproof housing to ensure safe use in the harsh environment of a coal mine.

[0015] The advantages of this utility model are: 1) It can automatically detect whether the feed input voltage is 127V, 660V, or 1140V; 2) It uses an RS485 interface to communicate with external devices, which has strong anti-interference capabilities and more stable operation. 3) The power-off operating mode can be set to normally open or normally closed, which facilitates user management. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the main view of the utility model.

[0017] Figure 2 This is an internal view of the utility model after part of the shell is removed.

[0018] Figure 3 This is a top view of the utility model with the upper cover removed.

[0019] Figure 4 It is the left view of the utility model.

[0020] Figure 5 This is the principle block diagram of the utility model.

[0021] Among them: 1 is the shell; 2 is the upper cover; 3 is the tempered glass; 4 is the terminal board; 5 is the display board; 6 is the main board; 7 is the transformer; 8 is the support plate; 9 is the large wire inlet; 10 is the small wire inlet; 11 is the internal grounding terminal; 12 is the second small wire inlet; 13 is the connecting shaft; 14 is the fixing hole; 15 is the external grounding terminal; 16 is the display window. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0023] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A flameproof and intrinsically safe power feeder for mining, comprising: a shell 1, an upper cover 2, a tempered glass 3, a terminal block 4, a display panel 5, a main board 6, a transformer 7, a support plate 8, a large wire inlet 9, a small wire inlet 10, an internal grounding terminal 11, a second small wire inlet 12, a connecting shaft 13, a fixing hole 14, an external grounding terminal 15, and a display window 16. It is characterized in that the display panel 5 is mounted on the terminal block 4, the terminal block 4 is mounted on two support plates 8, the main board 6 is mounted on the side of the support plate 8, the transformer 7 is mounted on the bottom of the shell 1, and the shell 1 and the upper cover 2 are connected together by a connecting shaft 13.

[0024] Furthermore, an observation window 16 is provided on the upper cover 2 .

[0025] Furthermore, the shell 1 and the upper cover 2 are made of Q235B and are flameproof shells.

[0026] Furthermore, the transformer 7 converts the high voltage of the feed input into a low voltage signal, which is then connected to the mainboard 6 .

[0027] Further, see Figure 5 The feeding end of the wiring board 4 is connected to the transformer 7 through a connecting line, and the transformer 7 is connected to the feeding input signal processing circuit of the main board 6 through a connecting line.

[0028] The power feed input signal processing circuit is provided with an auxiliary circuit for detecting the power feed input voltage level, which can automatically detect whether the power feed input voltage is a specific voltage among 127V / 660V / 1140V.

[0029] Further, see Figure 5 The power-off end of the wiring board 4 is connected to the power-off control unit of the main board 6 through a connecting line.

[0030] The power-off control unit can be set to a normally open / normally closed working mode, and can be intuitively displayed on the display panel 5 .

[0031] Furthermore, the display panel 5 is provided with a digital tube driving circuit and an infrared signal receiving circuit.

[0032] The above description is only one embodiment of the present invention, and does not limit the scope of the patent application of the present invention. Any equivalent structural changes made using the description and illustrations of the present invention are included in the scope of protection of the present invention.

Claims

1. A flameproof and intrinsically safe power feeder for mining, comprising: A shell (1), an upper cover (2), a terminal block (4), a display panel (5), a main board (6) and a transformer (7), characterized in that a support plate (8) is provided inside the shell (1), the main board (6) is mounted on the support plate (8), the transformer (7) is mounted on the bottom of the shell (1), the display panel (5) is mounted on the terminal block (4), the terminal block (4) is mounted on the support plate (8), a large wiring port (9) and a small wiring port (10) (12) are provided on the shell, an internal grounding terminal (11) and an external grounding terminal (15) are provided inside the shell (1), a fixing hole (14) is provided on the bottom of the shell (1), a tempered glass (3) is mounted on the upper cover (2), and the shell (1) and the upper cover (2) are mounted together via a connecting shaft (13).

2. The flameproof and intrinsically safe power feeder for mining according to claim 1, characterized in that: The shell (1) and the upper cover (2) are made of Q235B and are flameproof shells.

3. The flameproof and intrinsically safe power feeder for mining according to claim 1, characterized in that: An observation window (16) is provided on the upper cover (2).

4. The flameproof and intrinsically safe power feeder for mining according to claim 1, characterized in that: The transformer (7) converts the high voltage of the feed input into a low voltage signal, which is then connected to the mainboard (6).

5. The flameproof and intrinsically safe power feeder for mining according to claim 1, characterized in that: The mainboard (6) is provided with a feed input signal processing circuit, a power-off control circuit, an RS485 communication circuit, and an information processing unit.

6. The flameproof and intrinsically safe power feeder for mining according to claim 5, characterized in that: The power feed input signal processing circuit is provided with an auxiliary circuit for detecting the power feed input voltage level.

7. The flameproof and intrinsically safe power feeder for mining according to claim 1, characterized in that: The display panel (5) is provided with a digital tube driving circuit and an infrared signal receiving circuit.

Images