Electric appliance box of mining explosion-proof type vacuum feeder switch

Abstract

An electric appliance box of a mining explosion-proof type vacuum feeder switch is provided with a round-can-shaped box body and a disc-shaped box door, the left side of the box door is hinged to the left side of the box body through a hinge, horizontally-arranged strip-shaped notches are formed in the right side of the box door and the right side of the box body, a rotating arm is vertically hinged to the right side of the box body, a cam is vertically hinged to the tail end of the rotating arm, and the cam is provided with an operating arm; when the box door is closed, the rotating arm is rotated into the strip-shaped notch, and the box door is pressed on the box body by rotating the cam; a pressing arm is further horizontally hinged to the right side of the box body, and after the box door is closed, the pressing arm abuts against an operating arm of the cam through gravity and is used for preventing the cam from rotating reversely. According to the electric appliance box, the cam pressing mechanism composed of the rotating arm, the cam and the operating arm and the pressing arm for guaranteeing closing of the cam pressing mechanism through gravity are arranged between the box body and the box door, and when the box door is opened or closed, only the pressing arm and the operating arm need to be operated in sequence; and convenient operation and quick opening and closing of the box door are realized on the premise of ensuring the explosion-proof performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mine-used electric appliance, especially to a mine-used electric appliance box of explosion-proof type vacuum feeder switch. BACKGROUND

[0002] The electric appliance box of mine-used explosion-proof type vacuum feeder switch is used for power transmission and power cut-off of underground power supply system, and since mine-used equipment generally uses 1140V, 660V high-voltage power, the national standard requires that the mine-used electric appliance box must have high explosion-proof performance. The conventional vacuum feeder switch adopts a round pot-shaped electric appliance box, and the box door and the box body are separable, and when the box door is closed, a person needs to lift the box door and tightly clamp the box door on the screw port of the box body through rotation. Although such opening and closing mode can guarantee the explosion-proof performance of the vacuum feeder switch, it is laborious to open and close and very inconvenient to use. SUMMARY

[0003] In order to overcome the deficiencies in the background art, the utility model discloses a mine-used electric appliance box of explosion-proof type vacuum feeder switch, and the purpose is to improve the opening and closing mode of the box door under the premise of guaranteeing the explosion-proof performance, facilitating the opening and closing operation of the box door.

[0004] Specifically, the utility model adopts the following technical scheme:

[0005] The electric appliance box of mine-used explosion-proof type vacuum feeder switch has a round pot-shaped box body and a disc-shaped box door, the left side of the box door and the box body are hingedly connected through a hinge, a horizontal strip-shaped gap is arranged on the right side of the box door and the box body, a rotating arm is vertically hingedly connected to the right side of the box body, a cam is vertically hingedly connected to the end of the rotating arm, and the cam has a control arm; when the box door is closed, the rotating arm is turned into the strip-shaped gap, and the box door is tightly pressed on the box body by rotating the cam; a pressing arm is also horizontally hingedly connected to the right side of the box body, and after the box door is closed, the pressing arm is pressed on the control arm of the cam by gravity, so as to prevent the cam from being reversely rotated.

[0006] Further improvement of the technical scheme, the pressing arm has a rod part in the shape of a broken line, a counterweight handle is connected to the end of the rod part, and a step structure is arranged between the rod part and the counterweight handle.

[0007] Further improvement of the technical scheme, the control arm is a round rod bent by 90°.

[0008] Further improvement of the technical scheme, a clamping block protruding to one side of the box body is arranged on the upper and lower ends of the box door, and a clamping groove corresponding to the clamping block is arranged on the box body.

[0009] Further improvement of the technical scheme, a handle and a window are arranged on the box door.

[0010] Further improvement of the technical scheme, a torsional spring is installed on the pressing arm, and the torsional spring is used to prevent the cam from being reversely rotated.

[0011] After implementing the above technical solutions, compared with the background technology, the utility model has the beneficial effects that:

[0012] The box door of the electric appliance box is hinged on the box body, a cam pressing mechanism composed of a rotating arm, a cam and an operating arm is arranged between the box body and the box door, and a pressing arm is arranged to ensure the closing of the cam pressing mechanism by gravity, and the box door is opened or closed by sequentially operating the pressing arm and the operating arm, thereby realizing the convenient operation and quick opening and closing of the box door under the premise of ensuring the explosion-proof performance. BRIEF DESCRIPTION OF DRAWINGS

[0013] ATTACHED Figure 1 The structure of the box door of the electric appliance box in the opened state is shown.

[0014] ATTACHED Figure 2 The structure of the box door of the electric appliance box in the closed state is shown.

[0015] ATTACHED Figure 3 The partial structure of the electric appliance box is shown. Figure 2 The partial structure of the electric appliance box is shown.

[0016] ATTACHED Figure 4 The structure of the pressing arm and the cam pressing mechanism in another view is shown.

[0017] In the drawings: 1, box door; 11, clamping block; 12, handle; 13, glass window; 2, box body; 21, strip-shaped notch; 22, clamping groove; 3, hinge; 4, rotating arm; 5, cam; 6, operating arm; 7, pressing arm; 71, rod part; 72, counterweight handle; 73, step structure; 8, torsion spring. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art will understand that the embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application. It should be noted that, in the description of the present application, the terms "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. It should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0019] Referring to the accompanying drawings Figure 1 , the accompanying Figure 1 drawings show a kind of electric appliance box of mine explosion-proof vacuum feeder switch, the electric appliance box has the tank body 2 of round pot shape and the disc-shaped box door 1, box door 1 is in open state.The left side of box door 1 and tank body 2 are hinged together by hinge 3, a strip-shaped gap 21 is provided at the right side of box door 1 and tank body 2, and the strip-shaped gap 21 is arranged along the horizontal direction.A clamping block 11 is provided at the upper and lower ends of box door 1, and the clamping block 11 protrudes to the side of tank body 2, and a clamping groove 22 corresponding to the clamping block 11 is provided on the tank body 2.When box door 1 is closed, the strip-shaped gap 21 on box door 1 and tank body 2 coincides, and the clamping block 11 is clamped in the corresponding clamping groove 22.

[0020] A rotating arm 4 is vertically hinged to the right side of the tank body 2, and the rotating arm 4 can rotate horizontally.A cam 5 is vertically hinged to the end of the rotating arm 4, and the cam 5 has a control arm 6, which is a 90°-bent round rod, and the cam 5 can be horizontally rotated by pushing and pulling the control arm 6.The rotating arm 4, the cam 5 and the control arm 6 constitute a cam pressing mechanism.

[0021] In addition, a pressing arm 7 is horizontally hinged above the rotating arm 4 on the right side of the tank body 2, and the pressing arm 7 can rotate up and down.The pressing arm 7 has a rod portion 71 in the shape of a broken line, and a counterweight handle 72 in the shape of a handle is provided at the end of the rod portion 71, the counterweight handle 72 has a large weight, and the diameter of the counterweight handle 72 is larger than the width of the rod portion 71, forming a step structure 73 between the rod portion 71 and the counterweight handle 72.

[0022] Referring to the accompanying drawings Figure 2 and the accompanyingFigure 3 , attached Figure 2 The diagram shows the structure of the door 1 of the electrical box in the closed state. Figure 3 Shown is the attached Figure 2 Schematic diagram of the local structure. Figure 2 and attached Figure 3 As can be seen, the door 1 is provided with a handle 12 and a glass window 13, through which the operating status of the electrical appliances inside the box can be observed. To close the door 1, the arm 4 is first rotated into the strip-shaped notch 21, and then the operating arm 6 is rotated to make the cam 5 contact the door 1, pressing the door 1 against the box body 2.

[0023] The cam clamping mechanism has a small stroke, but it has a strong clamping force and self-locking properties, which can reliably press the door 1 against the box body 2, ensuring the sealing and explosion-proof performance between the door 1 and the box body 2. Compared with threaded structures or other clamping mechanisms, the cam clamping mechanism is simple in structure, easy to operate, and reliable in use.

[0024] Existing mining electrical enclosures typically feature a linkage switch that must be engaged before the enclosure door 1 can be opened. The linkage switch in the present utility model is a clamping arm 7 hinged to the enclosure body 2. Before opening the enclosure door 1, the clamping arm 7 must be rotated upward to create space before the operating arm 6 can be rotated. Without first rotating the clamping arm 7 upward, the operating arm 6 will be blocked by a step structure 73 on the clamping arm 7, preventing it from opening.

[0025] Refer to the attached Figure 4 After the door 1 is closed, the clamping arm 7 relies on gravity to press against the operating arm 6 of the cam 5, preventing the cam 5 from rotating in the opposite direction. To increase the pressing force, a torsion spring 8 is installed on the clamping arm 7. The torsion spring 8 is used to increase the pressing force and prevent the cam 5 from rotating in the opposite direction. Because the clamping blocks 11 at the upper and lower ends of the door 1 are stuck in the slots 22 of the box body 2 and bear the weight of the door 1, the rotating arm 4, cam 5, and operating arm 6 do not need to bear the weight of the door 1.

[0026] From the above, it can be seen that the door 1 of the electrical box is hinged on the box body 2, and a cam clamping mechanism composed of a rotating arm 4, a cam 5 and an operating arm 6 is provided between the box body 2 and the door 1, as well as a clamping arm 7 that relies on gravity to ensure that the cam clamping mechanism is closed. When opening or closing the door 1, it is only necessary to operate the clamping arm 7 and the operating arm 6 in sequence, thereby achieving convenient operation and rapid opening and closing of the door 1 while ensuring explosion-proof performance.

[0027] The part not described in detail is prior art. Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An electrical box for a mine explosion-proof vacuum feeder switch having a round canister shaped body and a round disc shaped door, characterized in that: The left side of the box door and the box body are hingedly connected, a horizontal strip-shaped gap is arranged on the right side of the box door and the box body, a rotating arm is vertically hingedly connected to the right side of the box body, a cam is vertically hingedly connected to the end of the rotating arm, and the cam has a control arm; when the box door is closed, the rotating arm is turned into the strip-shaped gap, and the box door is pressed on the box body by rotating the cam; a pressing arm is horizontally hingedly connected to the right side of the box body, and after the box door is closed, the pressing arm is pressed on the control arm of the cam by gravity, so as to prevent the cam from being reversely rotated.

2. An explosion-proof electric appliance box for a mine according to claim 1, characterized in that: The pressing arm has a broken line-shaped rod part, a counterweight handle is connected to the end of the rod part, and a step structure is arranged between the rod part and the counterweight handle.

3. A mine explosion-proof vacuum feeder switch electrical box as claimed in claim 1, characterized in that: The control arm is a 90°-bent round rod.

4. An explosion-proof electrical box for a mine-used vacuum feeder switch according to claim 1, characterized in that: A clamping block protruding to the side of the box body is arranged on the upper and lower ends of the box door, and a clamping groove corresponding to the clamping block is arranged on the box body.

5. A mine duty flame-proof vacuum feeder switchgear box as claimed in claim 1, characterized in that: A handle and a window are arranged on the box door.

6. A mine duty flame-proof vacuum feeder switchgear box as claimed in claim 1, characterized in that: A torsion spring is arranged on the pressing arm, and the torsion spring is used to prevent the cam from being reversely rotated.

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