Mine power box

Abstract

The present invention provides a mining power supply box, comprising a housing composed of a box body and an upper cover, a core module detachably fixed in the box body, a battery box module, 1 to 3 independent power output modules with different output voltages, and a power switch fixed on the box body; the core module comprises a core frame and a transformer fixed on the core frame, a switching power supply and an explosion-proof junction box; the battery box module comprises a box body, a box cover, a rechargeable battery fixed in the box body, and a main control circuit board fixed on the box body; an explosion-proof observation window and a liquid crystal display are fixed on the upper cover; the liquid crystal display, the rechargeable battery, the power output module, the power switch and the switching power supply are all electrically connected to the main control circuit board; the switching power supply is electrically connected to the output end of the transformer and the input end of the switching power supply and the transformer is externally connected to an AC power supply when in use. The present invention is convenient to install and maintain through the design of the overall structure, saves equipment cost, has good heat dissipation performance, and works safely and reliably.

Description

Technical Field

[0001] The invention relates to the technical field of direct current power supplies, and in particular to a power supply box for mining. Background Art

[0002] Coal mines need to use DC power supplies of different voltage levels such as 12V, 18V, and 24V in many equipment and production sites. Coal mines currently generally use mining power boxes to provide the above DC power supplies. The mining power box converts the 1140V, 660V, 220V, and 127V AC power commonly used in coal mines into DC power through transformers and switching power supplies, and then processes it through the main control circuit board and outputs the DC power of the required voltage level through the power module. Or, when the AC power supply is not connected, the built-in rechargeable lithium battery is used as the power source to output the DC power of the required voltage level after processing. The power output module of the mining power box currently common in coal mines is integrated on the main control circuit board of the power box. The DC power output is one of 12V, 18V or 24V, which is a customized power output module. The rechargeable battery, transformer, switching power supply, main control circuit board and other numerous circuit components are dispersedly installed in the power box shell. The problems it brings are: first, since the shell of the mining power box itself is an explosion-proof structure, it is relatively bulky and has limited internal installation space. Many existing circuit components are dispersedly installed in the shell, making the installation of each circuit component in the shell very crowded, and many circuit components in the power box will generate heat when working. Therefore, the heat dissipation performance of the power box when working also needs to be considered. For this reason, the size of the shell has to be enlarged, which increases the manufacturing cost of the mining power box on the one hand, and increases the volume and weight on the other hand, making the mining power box difficult to carry during use. Inconvenience; and because its power output module is arranged on the main control circuit board and can only output power of one voltage level among 12V, 18V or 24V, it cannot be switched during use. Therefore, when using DC power supply of different voltage levels, it is necessary to use a mining power supply box with corresponding output, which also increases the cost of coal mine equipment. In addition, the power output module will generate a lot of heat when working under load during use. The existing power output module integrated on the main control circuit board either does not consider the heat dissipation performance, which greatly affects the service life of the mining power supply box, or considers the heat dissipation performance by trying to stick the power output module on the inner wall of the mining power supply box for heat dissipation. However, the problem it brings is that the structural design and installation position of the circuit board need to be coordinated with the box body of the power supply box, which increases the difficulty of designing and installing the circuit board and affects the orderly installation of other circuit components.

[0003] The mining power box is usually provided with a power switch on the outer shell to control the on and off of the rechargeable battery as the power output. At present, the mining power box usually adopts a knob-type power switch, which mainly controls the opening and disconnection of the corresponding circuit on the internal main control circuit board through the connecting rod to control the micro switch (also called explosion-proof switch). The common structure of the existing knob-type switch is that a knob is provided on the outside of the power box body, and the connecting rod with the outer end fixedly connected to the knob is made into a D-shaped (semicircular) head at the head extending into the box body. A micro switch is arranged in the box body in cooperation with the head of the connecting rod. The outer knob is rotated to drive the connecting rod to move. The semicircular outer end face of the D-shaped head of the connecting rod contacts the pull plate of the micro switch, so that the button action of the micro switch connects the circuit. Continue to rotate, the flat side of the connecting rod does not contact the knob switch, the micro switch is reset, and the circuit is disconnected. The shortcomings of this type of knob switch are: first, the travel distance of the D-type head pressing the microswitch pull plate is too small, and the installation and coordination between the two must be very precise, otherwise a slight error in such a small travel may prevent the microswitch from operating, and after long-term use, it is more likely to increase the gap between the D-type head of the connecting rod and the microswitch, making the power switch inoperable; during use, the knob is in a 360-degree rotation mode, and the microswitch is always switching between the on and off states. Therefore, when turning the power box on or off, it is easy to turn the output power on and off for multiple times in a row, which has an adverse effect on the circuit of the power box; third, the knob has an unlimited position structure, and when the power box is shaken or the knob is touched manually, it is easy to cause the knob switch to malfunction. Summary of the invention

[0004] The purpose of the present invention is to provide a mining power supply box to solve the technical problems existing in the prior art.

[0005] The technical solution of the present invention is: the mining power box of the present invention includes a shell formed by a box body and an upper cover fixedly connected, and its structural characteristics are: it also includes a movement module, a battery box module, 1 to 3 independent power output modules with different output voltage levels, and a power switch fixedly arranged on the box body; the movement module includes a movement frame, a transformer, a switching power supply and an explosion-proof junction box fixedly arranged on the movement frame; the battery box module includes a box body, a box cover, a rechargeable battery fixedly arranged in the box body and a main control circuit board fixedly arranged on the front side of the box body; the power switch is used for the on-off control of the rechargeable battery as a power output, and the power switch includes a base fixedly arranged on the box body, a knob arranged outside the box body, a mounting plate arranged in the box body and fixedly connected to the rear end of the base, and a mounting plate fixedly arranged on the mounting plate and connected to the main control circuit board. A microswitch electrically connected to the circuit board, a toggle plate for triggering the action of the microswitch, a connecting rod that can movably pass through the base and is fixedly connected to the knob and the toggle plate at both ends, and a limit stopper fixedly arranged on the mounting plate for limiting the stroke of the toggle plate; an explosion-proof observation window and a liquid crystal display fixedly arranged at the lower end of the explosion-proof observation window are fixedly arranged on the upper cover; the liquid crystal display, the rechargeable battery, the power output module, the power switch and the DC output end of the switching power supply are electrically connected to the main control circuit board respectively; the AC input end of the switching power supply is electrically connected to the output end of the transformer through the terminal block arranged in the explosion-proof junction box and can be electrically connected to an external AC220V or AC127V power supply when in use, and the input end of the transformer is electrically connected to an external AC660V or AC11440V power supply through the terminal block when in use.

[0006] A further solution is: the base is a structural member integrally composed of an external connection part, a mounting through part and an internal mounting part; the external connection part and the mounting through part are both structural members that are in the shape of a round pancake as a whole and are provided with a mounting connection hole at the axial center, and the diameter of the mounting through part is smaller than the diameter of the external connection part; the internal mounting part is a semi-circular ring-shaped structural member, the diameter of the internal mounting part is the same as the diameter of the mounting through part and is integrally connected to the lower side of the rear end surface of the mounting through part; the base passes through the box body through its mounting through part and is fixedly connected to the box body; the connecting rod is a member formed by the base through part, A structural member integrally formed by a knob connecting portion, a toggle plate blocking portion and a toggle plate connecting portion; the knob connecting portion and the toggle plate blocking portion are respectively arranged at the front and rear ends of the base through portion, and the toggle plate connecting portion is arranged at the rear end of the toggle plate blocking portion; the connecting rod is movably inserted into the mounting connecting holes of the outer connecting portion and the mounting through portion of the above-mentioned base by its base through portion, and the connecting rod is inserted into the mounting connecting hole provided at the axial center of the knob by its knob connecting portion and fixedly connected to the knob; the toggle plate blocking portion and the toggle plate connecting portion of the connecting rod are arranged in the inner mounting portion of the base.

[0007] A further solution is: the power switch also includes a spring and a ball-end screw for limiting and self-locking the knob, the spring is sleeved on the outer circumferential surface of the blocking portion of the toggle plate of the connecting rod, and the front and rear ends of the spring are elastically abutted against the rear end surface of the installation through portion of the base and the front end surface of the toggle plate respectively; an arc-shaped slot hole is provided on the front end surface of the external connecting portion of the base; the ball-end screw is fixed in the knob by matching its outer shell with the ball-end screw mounting screw hole provided on the knob, and the steel ball of the ball-end screw matches the arc-shaped slot hole of the external connecting portion of the base.

[0008] A further solution is: the above-mentioned toggle plate is a strip-shaped plate body with arc-shaped sides in the width direction; the toggle plate is fixedly connected to the toggle plate connecting part of the above-mentioned connecting rod at its center, and the diameter of the circle where the arcs on both sides of the toggle plate are located is smaller than the diameter of the inner mounting part of the base, so that the toggle plate can rotate in the semicircular inner mounting part of the base under the drive of the connecting rod.

[0009] A further solution is: the movement frame includes a base frame and a middle frame and an upper frame which are fixedly mounted on the base frame in layers; the transformer, switching power supply and explosion-proof junction box are respectively fixedly mounted on the base frame, middle frame and upper frame of the movement frame.

[0010] A further solution is: the above-mentioned base frame includes a frame body, mounting feet and support rods, the above-mentioned frame body is a plate structure composed of a rear plate and a bottom plate provided with heat dissipation holes and mounting screw holes, which are integrated or fixedly connected; the mounting feet are narrow strip-shaped plate members, and one mounting foot is fixedly provided on each of the left and right sides of the lower end of the bottom plate of the frame body; one support rod is fixedly provided on each of the left and right sides of the upper end of the bottom plate of the frame body; the above-mentioned middle frame and upper frame are both plate structures, and the middle frame and the upper frame are each integrated or fixedly connected with the rear plate of the frame body of the base frame by their rear ends, and the middle frame and the rear frame are each fixedly connected with the two support rods of the base frame by their front sides.

[0011] A further solution is: the above-mentioned middle frame is integrally or fixedly provided with a side guard plate on its left and right sides; the upper frame is a plate structure composed of a base plate and a mounting connecting plate integrally or fixedly provided above the rear end of the base plate, and the base plate of the upper frame is provided with an explosion-proof junction box mounting hole and a heat dissipation hole; the material of the above-mentioned movement frame is aluminum or stainless steel that is easy to dissipate heat; the above-mentioned movement module is formed by the rear plate of the frame body of the base frame of the movement frame being attached to the rear wall of the above-mentioned box body and the mounting connecting plate of the upper frame being fixedly connected to the upper side of the rear wall of the box body, and the mounting feet of the frame body of the base frame are fixedly connected to the right wall of the box body, thereby fixing the movement module on the right side of the box body.

[0012] A further solution is: the power output module includes a shell with a front opening, an output circuit board fixedly arranged in the shell for converting input power into a 12V, 18V or 24V output DC power supply, a plug connector, a wire group and an output terminal for electrical connection, a sealing cover made of an aluminum plate fixedly connected to the shell and closing the front opening of the shell, and a thermally conductive silicone pad fixedly arranged between the output circuit board and the sealing cover; the output terminal is electrically connected to the output circuit board, the inner end of the plug connector is electrically connected to the wire group, and the wire group is electrically connected to the output circuit board through a wiring hole opened in the shell; the plug connector is plugged into and electrically connected to a wiring socket correspondingly arranged on the main control circuit board.

[0013] A further solution is: the power output module is detachably fixed at the left front side of the box body by means of a sealing cover plate thereof abutting against the front inner wall of the box body through a provided mounting accessory; the mounting accessory comprises a clamping strip fixedly arranged on the upper side of the front inner wall of the box body, a clamping groove fixedly arranged on the upper end surface of the bottom plate of the box body, and 2 to 6 clamps that can cooperate with the clamping strip; the lower end of the power output module is arranged in the clamping groove, and the upper end of the power output module is fixed by two clamps.

[0014] A further solution is that two input connectors and two output connectors for internal and external electrical connection, as well as a grounding terminal and a handle are fixedly provided on the box body.

[0015] The present invention has positive effects:

[0016] (1) The present invention adopts a modular structural design including a movement module, a battery box module, and a power output module, so that numerous circuit components can be conveniently fixed and installed. On the one hand, it can effectively utilize the installation space in the mining power supply box so that its overall size can be effectively reduced relative to similar mining power supply boxes, saving equipment costs and facilitating transportation during use; at the same time, the overall heat dissipation performance is significantly better than that of similar mining power supply boxes; and each module is installed independently. When a fault occurs during use, the corresponding module can be taken out separately for repair or replacement, which is convenient for operation and maintenance.

[0017] (2) The present invention designs the power output module into three independent power output modules with output DC voltage levels of 12V, 18V and 24V. When in use, one to three power output modules with different voltage output levels can be installed in the mine power supply box at the same time. During use, the power output modules with three different voltage output levels can be replaced in the mine power supply box by plugging and unplugging according to the needs of the output voltage level. Therefore, only one mine power supply box of the present invention is needed to meet the needs of the three different voltage output levels. Compared with the prior art that requires three mine power supply boxes each outputting a different voltage level, the coal mine equipment cost can be saved and the use is more convenient.

[0018] (3) The power switch of the present invention is provided with a toggle plate with arc-shaped sides fixedly disposed at the inner end of the connecting rod. The toggle plate can be movably disposed in the semicircular inner mounting portion of the base. The micro switch is fixed on the mounting plate and disposed above the semicircular inner mounting portion of the base. When in use, the micro switch is triggered by the toggle plate, which can effectively ensure the reliability and durability of the switch, thereby effectively solving the technical problems that the stroke distance of the existing knob-type switch D-shaped head pressing the micro switch pull plate is too small and the gap between the D-shaped head of the connecting rod and the micro switch is more likely to increase after long-term use, resulting in poor operation of the power switch; by arranging a toggle plate on one side of the micro switch on the mounting plate to limit the stroke of the toggle plate The limit stopper, when the toggle plate rotates 90 degrees, the limit stopper will limit the continued movement of the toggle plate, so that the knob cannot be turned further, thereby effectively solving the adverse effect caused by the existing knob-type switch knob being in a 360-degree rotation mode, which makes the micro switch always switch between the on and off states; by arranging a ball screw to self-lock the knob after the knob is released in the rotation position, it can effectively solve the technical problem that the existing knob-type switch is prone to malfunction due to the shaking of the power box or human touching the knob; by arranging a spring on the outer periphery of the connecting rod between the toggle plate and the base, the rotation resistance of the switch can be effectively increased, the switch can be prevented from being rotated too easily, and the switch malfunction can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the appearance structure of the present invention;

[0020] Figure 2 for Figure 1 AA section view;

[0021] Figure 3 for Figure 1 BB section view;

[0022] Figure 4 for Figure 1 CC section view;

[0023] Figure 5 for Figure 4 Schematic diagram of the structure of the middle movement frame;

[0024] Figure 6 for Figure 5 Left view of;

[0025] Figure 7 for Figure 5 A top view of

[0026] Figure 8 for Figure 4 A schematic diagram of the structure of the battery box module;

[0027] Fig. 9 for Figure 4 The schematic diagram of the structure of the power output module;

[0028] Fig.10 for Fig. 9 DD section view;

[0029] Fig.11 This is a schematic diagram of the structure of installing the power output module in the box of the mining power box through the installation accessories;

[0030] Fig.12 is a schematic diagram of the installation structure of the power output module when viewed from the side of the power output module;

[0031] Fig.13 It is a schematic block diagram of the circuit structure of the present invention;

[0032] Fig.14 for Figure 1 Schematic diagram of the overall structure of the power switch;

[0033] Fig.15 To remove Fig.14 Schematic diagram of the three-dimensional structure after the middle base, knob, connecting rod and toggle plate are assembled;

[0034] Fig.16 for Fig.14 A schematic diagram of the structure of the middle connecting rod;

[0035] Fig.17 for Fig.14 Schematic diagram of the structure of the middle mounting plate and micro switch;

[0036] Fig.18 To remove Fig.17 Left view of the rear mounting plate of the micro switch in Figure .

[0037] The reference numerals in the above drawings are as follows:

[0038] Shell 1, box body 11, input connector 11-1, output connector 11-2, grounding terminal 11-3, handle 11-4, upper cover 12, explosion-proof observation window 12-1, liquid crystal display screen 12-2;

[0039] Movement module 2, movement frame 21, base frame 21-1, frame body 21-1-1, mounting feet 21-1-2, support rods 21-1-3, middle frame 21-2, side guard plates 21-2-1, upper frame 21-3, base plate 21-3-1, mounting connecting plate 21-3-2, explosion-proof junction box mounting hole 21-3-1-1, heat dissipation holes 21-3-1-2, transformer 22, switching power supply 23, explosion-proof junction box 24, terminal block 24-1;

[0040] Battery box module 3, box body 31, box cover 32, rechargeable battery 33, main control circuit board 34;

[0041] Power output module 4, housing 41, output circuit board 42, plug connector 43, wire group 44, output terminal 45, sealing cover 46, thermal conductive silicone pad 47, rubber sleeve 48; installation accessories 49, clamping strip 49-1, clamping slot 49-2, clamping hoop 49-3;

[0042] Power switch 5, base 51, external connection part 51-1, arc-shaped slot hole 51-1-1, box through part 51-2, internal mounting part 51-3, connecting screw hole 51-3-1; knob 52, grid-shaped groove 52-1; connecting rod 53, mounting through part 53-1, knob connecting part 53-2, toggle plate blocking part 53-3, toggle plate connecting part 53-4; toggle plate 54; mounting plate 55, screw hole 55-1; micro switch 56, paddle 56-1, micro button 56-2; limit stop rod 57; ball screw 58; spring 59. DETAILED DESCRIPTION

[0043] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] (Example 1)

[0045] In this embodiment, when describing the position, Figure 1 The direction is the front in the description, with the back facing Figure 1 The direction is the rear in the description. Figure 1 The up, down, left, and right directions are still the same as those in the description.

[0046] See Figures 1 to 13 The modular structure of the mining power box of this embodiment is mainly composed of a shell 1, a movement module 2 fixed in the shell 1, a battery box module 3, a power output module 4 and a power switch 5 fixed on the shell 1.

[0047] See also Figures 1 to 4The housing 1 is mainly composed of a box body 11 and an upper cover 12 fixed on the box body 11. The box body 11 is a box body with an opening at the upper end. Two input connectors 11-1, two output connectors 11-2, a grounding terminal 11-3 and a handle 11-4 are fixed on the box body 11. When in use, the two input connectors 11-1 are used to electrically connect to the 1140V, 660V, 220V or 127V AC power supply commonly used in coal mines, the two output connectors 11-2 are used to output the DC power supply of the required voltage level, and a grounding terminal 11-3 is used to ground the power box of this embodiment when in use to ensure safety. The handle 11-4 facilitates the transportation of the power box when in use. The upper cover 12 is a plate body that matches the upper opening of the box body 11. The upper cover 12 is provided with an explosion-proof observation window 12-1 made of tempered glass, and the upper cover 12 is fixed with a liquid crystal display screen 12-2 at the lower end of its explosion-proof observation window 12-1.

[0048] See also Figures 2 to 7 The movement module 2 is mainly composed of a movement frame 21, a transformer 22 fixed on the movement frame 21, a switching power supply 23 and an explosion-proof junction box 24.

[0049] The movement frame 21 is used for the integrated installation of the transformer 22, the switching power supply 23 and the explosion-proof junction box 24. As a specific implementation method, the movement frame 21 is mainly composed of a base frame 21-1 and a middle frame 21-2 and an upper frame 21-3 fixedly arranged on the base frame 21-1 in an upper and lower layered manner. The base frame 21-1 is composed of a frame body 21-1-1, mounting feet 21-1-2 and support rods 21-1-3. The frame body 21-1-1 is a plate body structure member that is integrated or fixedly connected with a back plate and a bottom plate with heat dissipation holes and mounting screw holes; the mounting feet 21-1-2 are narrow strip-shaped plate members, and the mounting feet 21-1-2 are provided with mounting screw holes. The mounting feet 21-1-2 are fixedly arranged on the left and right sides of the lower end of the bottom plate of the frame body 21-1-1; the support rods 21-1-3 are fixedly arranged on the left and right sides of the upper end of the bottom plate of the frame body 21-1-1. The middle frame 21-2 is a plate structure. The middle frame 21-2 is integrally or fixedly connected to the rear plate of the frame body 21-1-1 of the base frame 21-1 at its rear end. The middle frame 21-2 is fixedly connected to the two support rods 21-1-3 of the base frame 21-1 at its front side, so that it is fixed above the bottom plate of the frame body 21-1-1 of the base frame 21-1; preferably, the middle frame 21-2 is integrally or fixedly provided with a side guard plate 21-2-1 on each of its left and right sides. The upper frame 21-3 is composed of a base plate 21-3-1 and a mounting connecting plate 21-3-2 integrally or fixedly arranged above the rear end of the base plate 21-3-1. The base plate 21-3-1 is provided with an explosion-proof junction box mounting hole 21-3-1-1 and a heat dissipation hole 21-3-1-2. The upper frame 21-3 is integrally or fixedly connected with the rear plate of the frame body 21-1-1 of the base frame 21-1 by the rear end of its base plate 21-3-1. The upper frame 21-3 is fixedly connected with the two support rods 21-1-3 of the base frame 21-1 by the front side of its base plate 21-3-1, so that it is fixedly arranged on the frame body 21-1-1 of the base frame 21-1 and located above the middle frame 21-2. The material of the movement frame 21 is aluminum or stainless steel that is easy to dissipate heat, so as to facilitate the heat dissipation of the transformer 22, the switching power supply 23 and the explosion-proof junction box 24 when in use.

[0050] The aforementioned transformer 22 is fixedly arranged on the upper end surface of the bottom plate of the frame body 21-1-1 of the base frame 21-1 of the movement frame 21; the switching power supply 23 is fixedly arranged on the upper end surface of the middle frame 21-2 of the movement frame 21; the explosion-proof junction box 24 is fixedly arranged in the explosion-proof junction box installation hole 21-3-1-1 of the base plate 21-3-1 of the upper frame 21-3, and the explosion-proof junction box 24 is provided with a terminal block 24-1 for electrical connection and wiring. The aforementioned transformer 22, switching power supply 23 and explosion-proof junction box 24 are all commercially available parts, and their specific structures and working principles are not described in detail.

[0051] The movement module 2 is formed by the rear plate of the frame body 21-1-1 of the base frame 21-1 of its movement frame 21 being attached to the rear wall of the box body 11 of the outer shell 1 to facilitate heat dissipation through the outer shell 1, the mounting foot 21-1-2 of the frame body 21-1-1 of the base frame 21-1 is located on the right side and is fixedly connected to the right wall of the box body 11 of the outer shell 1, and the mounting connecting plate 21-3-2 of the upper frame 21-3 is fixedly connected to the upper side of the rear wall of the box body 11 of the outer shell 1, thereby fixing the movement module 2 on the right side of the box body 11 of the outer shell 1.

[0052] See also Figure 3 , Figure 4 and Figure 8 The battery box module 3 is mainly composed of a box body 31, a box cover 32 detachably fixedly connected to the box body 31, a rechargeable battery 33 fixedly arranged in the box body 31, and a main control circuit board 34 fixedly arranged on the front side of the box body 31. The battery box module 3 is laterally fixedly arranged at the left rear side of the box body 11 of the outer shell 1. The main control circuit board 34 is provided with a plurality of terminal blocks for electrical connection. The installation method of the main control circuit board 34 in the box body 11 of the outer shell 1 in this embodiment is different from that in the prior art where the main control circuit board 34 is installed separately in the box body 11. The main control circuit board 34 in this embodiment is integratedly installed on the front side of the box body 31. At the same time, the circuit structure of the main control circuit board 34 is different from that in the prior art in that the power output module is removed from the main control circuit board in the prior art, and an independent power output module 4 is provided.

[0053] See also Fig. 9 and Fig.10 The power output module 4 is mainly composed of a housing 41 , an output circuit board 42 , a plug connector 43 , a wire group 44 , an output terminal 45 , a sealing cover 46 , a thermal conductive silicone pad 47 and a rubber sleeve 48 .

[0054] The housing 41 is a structural member in the shape of a square box with an opening at the front end. A wiring hole is provided in the middle of the lower part of the housing 41, and a terminal mounting hole is provided at the upper end of the housing 41. The output circuit board 42 is used to process the DC power input from the main control circuit board 34 and convert it into a DC power supply with an output voltage level of 12V, 18V or 24V. The circuit structure of the output circuit board 42 is a mature existing technology, and its specific structure and working principle are not described in detail. The plug connector 43 and the wire group 44 are arranged in a matching manner. The inner end of the plug connector 43 passes through the wiring hole of the housing 41 through the wire group 44 and enters the housing 41 to be electrically connected to the output circuit board 42. When in use, the plug connector 43 is plugged and electrically connected to the corresponding wiring seat on the main control circuit board 34. The output terminal 45 is used for the DC power output wiring of the power output module 4. The output terminal 45 is electrically connected to the output circuit board 42, and the output terminal 45 is electrically connected to the two output connectors 11-2 on the box body 11 of the housing 1. The sealing cover plate 46 is fixedly connected to the housing 41 by screws and is arranged on the front opening of the housing 41 to close the front opening of the housing 41. The sealing cover plate 46 is made of a material that is easy to dissipate heat. In this embodiment, the sealing cover plate 46 is preferably made of an aluminum plate with good heat dissipation performance and low price. The size of the thermal conductive silicone pad 47 is adapted to the output circuit board 42. The thermal conductive silicone pad 47 is fixedly arranged between the front end surface of the output circuit board 42 and the rear end surface of the sealing cover plate 46. When working, the heat generated by the output circuit board 42 can be timely transferred to the box body 11 of the housing 1 through the thermal conductive silicone pad 7 through the sealing cover plate 46 for heat dissipation. At the same time, the thermal conductive silicone pad 7 also plays the role of insulation between the relevant components on the circuit board and the sealing cover plate 46. The rubber sleeve 48 is preferably arranged in a preferred manner. The rubber sleeve 48 is fixedly arranged in the wiring hole of the housing 41 to protect the wire group 44 from wear during its use.

[0055] One to three power output modules 4 can be provided according to the use requirements. In this embodiment, the power output modules 4 are preferably provided with a first to a third power output module 4 which respectively output 12V, 18V, and 24V DC power.

[0056] The power output module 4 is detachably fixed to the left front of the box 11 by means of the sealing cover plate 46 thereof and the front inner wall of the box 11 of the housing 1 through the mounting accessories 49. As a specific implementation, the mounting accessories 49 mainly consist of a clamping strip 49-1 fixed to the upper side of the front inner wall of the box 11, a clamping slot 49-2 fixed to the upper surface of the bottom plate of the box 11, and a plurality of (2 to 6) clamps 49-3 that can cooperate with the clamping strip 49-1. The lower end of the power output module 4 is arranged in the clamping slot 49-2, and the upper end of the power output module 4 is fixed by two clamps 49-3. As a preferred embodiment, three power output modules 4 are arranged in parallel in this embodiment.

[0057] The power output module 4 of the present embodiment can be set to one, two or three output DC voltage levels of 12V, 18V or 24V. When one or two power output modules 4 are set, if necessary during use, the installed power output module 4 can be conveniently replaced with an uninstalled power output module 4 with an output DC voltage level, and two or one uninstalled power output module 4 with an output DC voltage level can also be installed in a plug-in manner. Therefore, by using the power output module 4 of the present embodiment, one mining power supply box can meet the needs of different voltage output levels during use. Compared with the prior art, which requires three mining power supply boxes each outputting a different voltage level, the power output module 4 of the present embodiment can save the cost of coal mine equipment. At the same time, the power output module 4 of the present embodiment is an independent structure, which only needs to find an empty space in the box body 11 of the mining power box, and can be detachably fixed and installed by means of the sealing cover 46 and the inner wall of the box body 11 of the outer shell 1 through the installation accessories 49. On the one hand, it is beneficial to the installation and arrangement of numerous circuit components in the mining power box, and on the other hand, the heat generated by the power output module during operation can be quickly transferred to the outer shell 1 of the mining power box through the thermal conductive silicone pad and the sealing cover 46 for dissipation, thereby greatly improving its heat dissipation performance, thereby effectively solving the technical problems in the prior art that the power output module integrated on the main control circuit board has poor heat dissipation performance or that the design and installation of the circuit board are difficult when the heat dissipation performance is considered.

[0058] See also Fig.13 The aforementioned LCD screen 12-2, the DC output terminal of the switching power supply 23, the rechargeable battery 33, the power output module 4 and the power switch 5 are electrically connected to the main control circuit board 34 respectively; the AC input terminal of the switching power supply 23 is electrically connected to the output terminal of the transformer 22 through the terminal block 24-1 in the explosion-proof junction box 24 and to the AC220V or AC127V power supply of the coal mine through the two input connectors 11-1, and the input terminal of the transformer is electrically connected to the AC660V or AC11440V power supply of the coal mine through the terminal block 24-1 in the explosion-proof junction box 24 and the two input connectors 11-1, so that the mining power supply box of this embodiment can be externally connected to any AC power supply of AC220V, AC127V, AC660V and AC11440V commonly used in coal mines, and is convenient to use. The 0V terminal in the terminal block 24-1 is electrically connected to the ground terminal 11-3 after passing through a fuse to ensure safety during use. The electrical connection relationship between the aforementioned components and the functions and working principles of the various circuit components of the mining power supply box are mature existing technologies and will not be described in detail.

[0059] As can be seen from the foregoing, the mining power box of this embodiment adopts a modular structural design including a movement module 2, a battery box module 3, and a power output module 4, so that numerous circuit components can be conveniently fixed and installed. On the one hand, the installation space in the mining power box can be effectively utilized so that the overall size relative to similar mining power boxes can be effectively reduced to save equipment costs and facilitate transportation during use; at the same time, the overall heat dissipation performance is significantly better than that of similar mining power boxes; and each module is installed independently. When a fault occurs during use, the corresponding module can be taken out separately for repair or replacement, which is convenient for operation and maintenance.

[0060] See also Figures 14 to 18 The power switch 5 is a knob-type on-off switch, and the power switch 5 is rotatably arranged on the front plate of the housing 11 of the housing 1; the power switch 5 is used to control the on-off of the power output when the rechargeable battery 33 of the battery box module 3 is used. As a specific implementation, the power switch 5 in this embodiment is mainly composed of a base 51, a knob 52, a connecting rod 53, a toggle plate 54, a mounting plate 55, a micro switch 56, a limit stop rod 57, a ball screw 58 and a spring 59.

[0061] The base 51 serves as the installation base of the power switch 5. The base 51 is a structural member integrally composed of an external connection portion 51-1, an installation through portion 51-2 and an internal installation portion 51-3 arranged from front to back. The external connection portion 51-1 is in a round shape as a whole and a mounting connection hole (not marked in the figure) is provided at the axial center; preferably, a rearwardly recessed arc slot hole cooperating with the ball screw 58 is provided on the front end surface of the external connection portion 51-1; the installation through portion 51-2 is a round structure with a diameter smaller than that of the external connection portion, and a mounting connection hole (not marked in the figure) is provided at the axial center of the installation through portion 51-2; the internal installation portion 51-3 is a semicircular ring structure, and the diameter of the internal installation portion 51-3 is the same as that of the installation through portion 51-2. The internal installation portion 51-3 is integrally connected to the lower side of the rear end surface of the installation through portion 51-2, and a connecting screw hole 51-3-1 for mounting and fixing the mounting plate is provided on the wall of the internal installation portion 51-3. The base 51 is fixedly connected to the box body 11 after the installation through portion 51 - 2 thereof passes through a corresponding switch installation hole on the box body 11 , and the fixed connection method is, for example, welding.

[0062] The knob 52 is a circular pancake-shaped structural member with a mounting connection hole (not marked in the figure) at the axial center. The diameter of the knob 52 is smaller than the diameter of the outer connection portion 51-1 of the base 1. Preferably, a grid-shaped groove 52-1 is provided on the outer circumference of the knob 52 to increase the friction force when the knob 52 is manually screwed during use. Preferably, the knob 52 is also provided with a ball screw mounting screw hole that penetrates forward and backward.

[0063] The connecting rod 53 is a structural member integrally formed by a base through portion 53-1, a knob connecting portion 53-2, a toggle plate blocking portion 53-3 and a toggle plate connecting portion 53-4; the knob connecting portion 53-2 and the toggle plate blocking portion 53-3 are respectively arranged at the front and rear ends of the base through portion 53-1, and the toggle plate connecting portion 53-4 is arranged at the rear end of the toggle plate blocking portion 53-3. The base through portion 53-1 of the connecting rod 53 can be movably inserted into the mounting connection holes of the outer connecting portion 51-1 and the mounting through portion 51-2 of the base 51, and the knob connecting portion 53-2 of the connecting rod 53 is plugged and fixedly connected with the mounting connection hole at the axial center of the knob 52; the toggle plate blocking portion 53-3 and the toggle plate connecting portion 53-4 of the connecting rod 53 are located in the semicircular inner mounting portion 51-3 of the base 51.

[0064] The toggle plate 54 is a strip-shaped plate member with arc-shaped sides in the width direction; the toggle plate 54 is fixedly connected to the toggle plate connecting part 53-4 of the connecting rod 53 at its center, and the diameter of the circle where the arcs on both sides of the toggle plate 54 are located is smaller than the diameter of the inner mounting part 51-3 of the base 51, so that the toggle plate 54 can be easily rotated in the semicircular inner mounting part 51-3 of the base 1 driven by the connecting rod 53.

[0065] The mounting plate 55 is a rectangular plate member, and the lower part and the middle part of the mounting plate 55 are respectively provided with screw holes 55-1 for fixing the mounting plate 55 on the base 51 and for mounting the micro switch 57 on the mounting plate 55. The mounting plate 55 is fixed to the rear end surface of the inner mounting part 51-3 of the base 51 by screws.

[0066] The micro switch 56 is a commercially available part, and preferably an explosion-proof switch of the MK-1B model is used. The micro switch 56 has a paddle 56-1 and a micro button 56-2; when an external force presses the paddle 56-1, the micro button 56-2 is actuated, thereby controlling the on and off of the rechargeable battery 33 as a power output through the main control circuit board 34. The structure and working principle of the micro switch 56 are not described in detail. The micro switch 56 is fixed to the front end surface of the middle upper part of the mounting plate 55 by screws. The micro switch 56 is electrically connected to the aforementioned main control circuit board 33.

[0067] The limit stopper 57 is used to limit the rotational movement angle of the toggle plate 54 by 90 degrees. The limit stopper 57 is fixed on the mounting plate 55 and is located below the side where the free end of the toggle piece 56-1 of the micro switch 56 is located.

[0068] The ball screw 58 is preferably provided. The ball screw 58 is a commercially available part, which is composed of a spring, a steel ball and a shell. Its structure and working principle are prior art and are not described in detail. The ball screw 58 is fixed in the knob 52 by its shell cooperating with the ball screw mounting screw hole of the knob 52. The steel ball of the ball screw 58 cooperates with the arc-shaped slot 51-1-1 provided on the outer end surface of the external connection part 51-1 of the base 51. The ball screw 58 is used to turn the knob 52 when in use so that the switch is in place and then release the knob 52 to limit the position and self-lock it, thereby effectively preventing the switch from malfunctioning due to shaking of the power box or human touch.

[0069] The spring 59 is preferably provided to increase the resistance to the rotation of the switch, to prevent the switch from being rotated too easily, and to prevent the switch from malfunctioning. The spring 59 is sleeved on the outer circumference of the toggle plate blocking portion 53-3 of the connecting rod 53, and the front and rear ends of the spring 59 are elastically abutted against the rear end surface of the installation through portion 51-2 of the base 51 and the front end surface of the toggle plate 54, respectively.

[0070] When the power switch 5 needs to be turned on during use, the operator manually turns the knob 52, and through the transmission of the connecting rod 53, the toggle plate 54 rotates clockwise, and the toggle plate 54 presses the paddle 56-1 of the micro switch 56, so that the paddle 56-1 presses the micro button 56-2 to connect the rechargeable battery in the battery box to the outside. When the hand-turned knob 52 reaches an angle of 90 degrees, the toggle plate 54 abuts against the limit stop rod 57 and cannot continue to rotate. After the operator lets go, the steel ball of the ball screw 58 is inserted into the arc-shaped slot hole on the outer end surface of the external connection part 51-1 of the base 51, so that the knob 52 is self-locking; when it is necessary to turn off the battery in the power box, the opposite action to the above is performed.

[0071] As can be seen from the foregoing, the power switch 5 is provided with a toggle plate 54 with arcs on both sides fixedly disposed at the inner end of the connecting rod 53, the toggle plate 54 is movably disposed in the semicircular inner mounting portion 51-3 of the base 51, and the micro switch 56 is fixed on the mounting plate 55 and disposed above the semicircular inner mounting portion 51-3 of the base 51. When in use, the micro switch 56 is triggered by the toggle plate 54, which can effectively ensure the reliability and durability of the switch, thereby effectively solving the technical problems that the travel distance of the existing knob-type switch D-type head pressing the micro switch pull plate is too small and the gap between the D-type head of the connecting rod and the micro switch is more likely to increase after long-term use, resulting in poor operation of the power switch; by arranging a toggle plate on the mounting plate 55 on one side of the micro switch 56 for limiting the movement of the toggle plate The limit stop rod 57 of the 54-stroke range limits the continued movement of the toggle plate 54 when the toggle plate 54 rotates 90 degrees, so that the knob 52 cannot be turned further, thereby effectively solving the adverse effect caused by the 360-degree rotation mode of the existing knob-type switch, which causes the micro switch to switch between the open and closed states all the time; by arranging the ball screw 58, the knob 52 is self-locked after the knob 52 is released from the rotation position, thereby effectively solving the technical problem of the existing knob-type switch that the knob switch is prone to malfunction due to the shaking of the power box or human touching the knob; by arranging a spring 59 on the outer periphery of the connecting rod 53 between the toggle plate 54 and the base 51, the rotation resistance of the switch can be effectively increased, the switch can be prevented from being rotated too easily, and the malfunction of the switch can be prevented.

[0072] The above embodiments are descriptions of specific implementation methods of the present invention rather than limitations of the present invention. Technical personnel in the relevant technical field can make various changes and modifications to obtain corresponding equivalent technical solutions without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should be included in the patent protection scope of the present invention.

Claims

1. A mining power supply box, comprising a housing formed by a box body and an upper cover fixedly connected, characterized in that: It also includes a movement module, a battery box module, 1 to 3 independent power output modules with different output voltage levels, and a power switch fixed on the box; the movement module includes a movement frame, a transformer, a switching power supply and an explosion-proof junction box fixed on the movement frame; the battery box module includes a box body, a box cover, a rechargeable battery fixed in the box body and a main control circuit board fixed on the front side of the box body; the power switch is used for on-off control of the rechargeable battery as a power output, and the power switch includes a base fixed on the box body, a knob provided on the outside of the box body, a mounting plate provided in the box body and fixedly connected to the rear end of the base, a micro switch fixed on the mounting plate and electrically connected to the main control circuit board, and used to trigger the micro switch to move A toggle plate for use as a switch, a connecting rod that can movably pass through the base and is fixedly connected to the knob and the toggle plate at both ends, a limit stopper fixedly arranged on the mounting plate for limiting the travel of the toggle plate; an explosion-proof observation window and a liquid crystal display fixedly arranged at the lower end of the explosion-proof observation window are fixedly arranged on the upper cover; the liquid crystal display, the rechargeable battery, the power output module, the power switch and the DC output end of the switching power supply are electrically connected to the main control circuit board respectively; the AC input end of the switching power supply is electrically connected to the output end of the transformer through the terminal block provided in the explosion-proof junction box and can be electrically connected to an external AC220V or AC127V power supply when in use, and the input end of the transformer is electrically connected to an external AC660V or AC11440V power supply through the terminal block when in use; The power switch also includes a spring and a ball screw for limiting and self-locking the knob, the spring is sleeved on the outer peripheral surface of the toggle plate blocking portion of the connecting rod, and the front and rear ends of the spring are elastically abutted against the rear end surface of the installation through portion of the base and the front end surface of the toggle plate respectively; an arc-shaped slot hole is provided on the front end surface of the external connection portion of the base; the ball screw is fixed in the knob by matching its outer shell with the ball screw mounting screw hole provided on the knob, and the steel ball of the ball screw matches the arc-shaped slot hole of the external connection portion of the base; The toggle plate is a strip-shaped plate member with arc-shaped sides in the width direction; the toggle plate is fixedly connected to the toggle plate connecting part of the connecting rod at its center, and the diameter of the circle where the arcs on both sides of the toggle plate are located is smaller than the diameter of the inner mounting part of the base, so that the toggle plate can rotate in the semicircular inner mounting part of the base under the drive of the connecting rod; The power output module includes a housing with a front opening, an output circuit board fixedly arranged in the housing for converting input power into a 12V, 18V or 24V output DC power supply, a plug connector, a wire group and an output terminal for electrical connection, a sealing cover made of an aluminum plate fixedly connected to the housing and sealing the front opening of the housing, and a thermally conductive silicone pad fixedly arranged between the output circuit board and the sealing cover; the output terminal is electrically connected to the output circuit board, the inner end of the plug connector is electrically connected to the wire group, and the wire group is electrically connected to the output circuit board through a wiring hole provided in the housing; the plug connector is plugged and electrically connected to a wiring seat correspondingly provided on the main control circuit board; The power output module is detachably fixed at the left front side of the box body by means of a provided mounting accessory in such a manner that its sealing cover plate is in contact with the front inner wall of the box body; the mounting accessory comprises a clamping strip fixedly arranged on the upper side of the front inner wall of the box body, a clamping groove fixedly arranged on the upper end surface of the bottom plate of the box body, and 2 to 6 clamps that can cooperate with the clamping strip; the lower end of the power output module is arranged in the clamping groove, and the upper end of the power output module is fixed by two clamps.

2. The mining power supply box according to claim 1, characterized in that: The base is a structural member integrally composed of an external connection part, a mounting through part and an internal mounting part; the external connection part and the mounting through part are both structural members that are in the shape of a round pancake as a whole and are provided with a mounting connection hole at the axial center, and the diameter of the mounting through part is smaller than the diameter of the external connection part; the internal mounting part is a semicircular ring structural member, the diameter of the internal mounting part is the same as the diameter of the mounting through part and is integrally connected to the lower side of the rear end surface of the mounting through part; the base passes through the box body through its mounting through part and is fixedly connected to the box body; the connecting rod is connected by the base through part and the knob The connecting rod is a structural member integrally composed of a knob portion, a toggle plate blocking portion and a toggle plate connecting portion; the knob connecting portion and the toggle plate blocking portion are respectively arranged at the front and rear ends of the base through portion, and the toggle plate connecting portion is arranged at the rear end of the toggle plate blocking portion; the connecting rod is movably inserted into the mounting connecting hole of the outer connecting portion and the mounting through portion of the base by its base through portion, and the connecting rod is inserted into the mounting connecting hole provided at the axial center of the knob by its knob connecting portion and fixedly connected to the knob; the toggle plate blocking portion and the toggle plate connecting portion of the connecting rod are arranged in the inner mounting portion of the base.

3. The mining power supply box according to claim 1, characterized in that: The movement frame comprises a base frame, a middle frame and an upper frame which are fixedly arranged on the base frame in layers; the transformer, the switching power supply and the explosion-proof junction box are respectively fixedly installed on the base frame, the middle frame and the upper frame of the movement frame.

4. The mining power supply box according to claim 3, characterized in that: The base frame includes a frame body, mounting feet and support rods. The frame body is a plate structure composed of a rear plate and a bottom plate provided with heat dissipation holes and mounting screw holes, which are integrated or fixedly connected. The mounting feet are narrow strip-shaped plate members, and one mounting foot is fixedly provided on each of the left and right sides of the lower end of the bottom plate of the frame body. The support rods are fixedly provided on each of the left and right sides of the upper end of the bottom plate of the frame body. The middle frame and the upper frame are both plate structures, and the middle frame and the upper frame are each integrated or fixedly connected with the rear plate of the frame body of the base frame at their rear ends, and the middle frame and the rear frame are each fixedly connected with the two support rods of the base frame at their front sides.

5. The mining power supply box according to claim 4, characterized in that: The middle frame is integrally or fixedly provided with a side guard plate on its left and right sides; the upper frame is a plate structure composed of a base plate and a mounting connecting plate integrally or fixedly provided above the rear end of the base plate, and the base plate of the upper frame is provided with an explosion-proof junction box mounting hole and a heat dissipation hole; the material of the movement frame is aluminum or stainless steel that is easy to dissipate heat; the movement module is formed by the rear plate of the frame body of the base frame of the movement frame being attached to the rear wall of the box body and the mounting connecting plate of the upper frame being fixedly connected to the upper side of the rear wall of the box body, and the mounting feet of the frame body of the base frame are fixedly connected to the right wall of the box body, thereby fixing the movement module on the right side of the box body.

6. The mining power supply box according to any one of claims 1 to 5, characterized in that: The box body is fixedly provided with two input connectors and two output connectors for internal and external electrical connection, a grounding terminal and a handle.

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