Mining explosion-proof pneumatic hoist

Abstract

The utility model relates to the technical field of pneumatic hoists, and provides a mining explosion-proof pneumatic hoist which comprises a shell, one end of the shell is fixedly connected with an air pump, the middle of the shell is fixedly connected with a lifting device, and an output shaft of the lifting device is fixedly connected with a winding drum used for winding a steel wire rope. An air outlet of the air pump is connected with a pressure dividing mechanism through a guide pipe, the pressure dividing mechanism comprises an air guide cylinder, the air guide cylinder is fixedly connected to the outer side of the air pump, one end of the air guide cylinder is fixedly connected with an air inlet pipe communicated with the air outlet of the air pump, and the other end of the air guide cylinder is fixedly connected with an air outlet pipe; a piston is slidably connected to the top end of the inner side of the diversion cylinder, a first spring is welded to the bottom end of the piston, the bottom end of the first spring is welded to the bottom wall of the diversion cylinder, and a pressure relief pipe is fixedly connected to the bottom end of the diversion cylinder. According to the whole structure, the air pressure of the air cylinder of the lifting device can be divided, and the function of protecting the air cylinder of the lifting device is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic hoists, and specifically, to a mine explosion-proof pneumatic hoist. Background Art

[0002] A pneumatic hoist is a lifting device of a pneumatic monorail crane, which can realize the lifting control of heavy objects. Common pneumatic hoists usually include a pneumatic motor, a sprocket, a chain, a chain storage box, a traveling mechanism, etc. The pneumatic hoist moves on the track under the action of the traveling mechanism, drives the sprocket to rotate through the pneumatic motor to control the winding and unwinding of the chain on the sprocket, and the lower end of the chain is connected with a hanging hook for hanging heavy objects.

[0003] After retrieval, "a pneumatic hoist, including an upper hanging hook assembly, a lower hanging hook assembly, a sprocket and a load-bearing chain wound around the sprocket" is disclosed in Chinese Patent Publication No. CN206486214U. "The lower hanging hook assembly includes a connecting part for connecting with the load-bearing chain, and the end of the load-bearing chain bypasses from below the connecting part and extends upward until it is fixed on the upper hanging hook assembly".

[0004] However, in the process of implementing the related technology, there are some technical defects in this patent: First, when hanging an overweight heavy object, a large volume of gas needs to be introduced into the cylinder of the lifting device to increase the air pressure, which makes the pressure inside the cylinder of the lifting device exceed the maximum bearing capacity, resulting in the problem of the cylinder explosion of the lifting device; Second, when the reel is winding the steel wire rope, once the steel wire rope on the reel is loose, it will cause the problem of steel wire rope winding, thus affecting the subsequent normal lifting work. In view of this, the utility model provides a mine explosion-proof pneumatic hoist. Summary of the Utility Model

[0005] The utility model provides a mine explosion-proof pneumatic hoist, which solves the problem that the air pressure in the cylinder of the lifting device 3 in the prior art is easy to exceed the air pressure bearing limit and explode.

[0006] The technical solution of the utility model is as follows: A mine explosion-proof pneumatic hoist includes a housing. One end of the housing is fixedly connected with an air pump. The middle part of the housing is fixedly connected with a lifting device. The output shaft of the lifting device is fixedly connected with a reel for winding a steel wire rope. The air outlet of the air pump is connected with a pressure dividing mechanism through a conduit. The pressure dividing mechanism includes a gas guide cylinder. The gas guide cylinder is fixedly connected to the outside of the air pump. One end of the gas guide cylinder is fixedly connected with an air inlet pipe communicated with the air outlet of the air pump. The other end of the gas guide cylinder is fixedly connected with an air outlet pipe communicated with the air inlet of the lifting device. The bottom of the gas guide cylinder is fixedly connected with a flow dividing cylinder. The top end inside the flow dividing cylinder is slidably connected with a piston. The bottom end of the piston is welded with a first spring. The bottom end of the first spring is welded with the bottom wall of the flow dividing cylinder. The bottom end of the flow dividing cylinder is fixedly connected with a pressure relief pipe.

[0007] Preferably, in the initial state of the first spring, the piston is located above the pressure relief pipe, and in the fully compressed state of the first spring, the piston is located below the pressure relief pipe.

[0008] Preferably, a pressing mechanism is provided at the top end of the winding drum. The pressing mechanism includes a mounting plate. One end of the mounting plate is fixedly connected with a slider, and the slider is slidably connected with the inner wall of the housing. A pressing member for pressing the steel wire rope is provided at the bottom of the mounting plate, and a pressing member is provided at the end of the slider away from the mounting plate. The pressing member is separated from the steel wire rope by driving the rotation of the winding drum.

[0009] Preferably, the pressing member includes a sleeve seat fixedly connected to the bottom of the mounting plate. A movable seat is slidably connected to the bottom end of the sleeve seat, and a pressing plate is fixedly connected to the bottom of the movable seat. The bottom surface of the pressing plate abuts against the steel wire rope.

[0010] Preferably, the pressing member further includes a guide block slidably connected to the inside of the sleeve seat. The bottom end of the guide block is fixedly connected to the top end of the movable seat. A second spring is sleeved on the top end inside the sleeve seat. The top end of the second spring abuts against the top wall of the sleeve seat, and the bottom end of the second spring abuts against the guide block.

[0011] Preferably, a chute matching the slider is provided on the outer side of the housing, and the slider can slide in the vertical direction along the chute.

[0012] Preferably, the pressing member includes a top rod. The top end of the top rod is rotatably connected to the slider through a pin shaft. A torsion spring is sleeved on the pin shaft of the top rod. One end of the torsion spring is welded to the slider, and the other end of the torsion spring is welded to the top rod. One end of the winding drum is coaxially fixedly connected with a gear, and the bottom end of the top rod is slidably matched with the tooth groove of the gear.

[0013] Preferably, the pressing member further includes a third spring. The top end of the third spring is welded to the top wall of the chute, and the bottom end of the third spring is welded to the slider.

[0014] The working principle and beneficial effects of the present utility model are as follows: Gas is introduced into the interior of the intake pipe through an air pump, increasing the air pressure inside the air guide cylinder. Among them, a part of the gas will be diverted into the interior of the shunt cylinder, and the other part is discharged from the outlet pipe and introduced into the cylinder of the lifting device. This can avoid the problem that all the gas is introduced into the cylinder of the lifting device, resulting in excessive air pressure inside the cylinder of the lifting device and causing it to burst. After the gas is introduced into the shunt cylinder, the air pressure will increase, causing the piston to move downward under the action of the air pressure to expand the volume of the shunt cylinder, thus achieving a buffering effect. When the air pressure inside the shunt cylinder is too high, at this time, the piston exerts a pressure on the first spring to completely compress it, causing the piston to slide below the pressure relief pipe, allowing the gas inside the shunt cylinder to be discharged from the pressure relief pipe. The entire structure can achieve pressure division of the air pressure in the cylinder of the lifting device and realize the protection function for the cylinder of the lifting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0016] Figure 1 Structural schematic diagram of a mine explosion-proof pneumatic hoist of the present utility model Figure 1 ;

[0017] Figure 2 Structural schematic diagram of a mine explosion-proof pneumatic hoist of the present utility model Figure 2 ;

[0018] Figure 3 Structural schematic diagram of the pressure dividing mechanism of the present utility model;

[0019] Figure 4 Structural schematic diagram of the pressing mechanism of the present utility model;

[0020] Figure 5 Structural schematic diagram of the pressing member of the present utility model;

[0021] Figure 6 Structural schematic diagram of the top pressing member of the present utility model.

[0022] In the figure: 1, housing; 2, air pump; 3, lifting device; 4, drum; 5, steel wire rope; 7, pressure dividing mechanism; 71, air guide cylinder; 72, intake pipe; 73, outlet pipe; 74, shunt cylinder; 75, piston; 76, first spring; 77, pressure relief pipe; 8, pressing mechanism; 81, mounting plate; 82, pressing member; 821, socket; 822, movable seat; 823, pressing plate; 824, guide block; 825, second spring; 83, slider; 84, top pressing member; 841, ejector rod; 842, torsion spring; 843, third spring; 844, gear; 85, chute. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.

[0024] As Figures 1 to 6 shown, this embodiment proposes a mine explosion-proof pneumatic hoist, which includes a housing 1. One end of the housing 1 is fixedly connected to an air pump 2. The middle of the housing 1 is fixedly connected to a lifting device 3. The output shaft of the lifting device 3 is fixedly connected to a drum 4 for winding a steel wire rope 5. The air outlet of the air pump 2 is connected to a pressure dividing mechanism 7 through a conduit. The pressure dividing mechanism 7 includes a gas guide cylinder 71. The gas guide cylinder 71 is fixedly connected to the outside of the air pump 2. One end of the gas guide cylinder 71 is fixedly connected to an intake pipe 72 that is connected to the air outlet of the air pump 2. The other end of the gas guide cylinder 71 is fixedly connected to an outlet pipe 73 that is connected to the intake port of the lifting device 3. The bottom of the gas guide cylinder 71 is fixedly connected to a flow dividing cylinder 74. The top end inside the flow dividing cylinder 74 is slidably connected to a piston 75. The bottom end of the piston 75 is welded to a first spring 76. The bottom end of the first spring 76 is welded to the bottom wall of the flow dividing cylinder 74. The bottom end of the flow dividing cylinder 74 is fixedly connected to a pressure relief pipe 77. In the initial state of the first spring 76, the piston 75 is located above the pressure relief pipe 77. In the fully compressed state of the first spring 76, the piston 75 is located below the pressure relief pipe 77.

[0025] The air pump 2 is used to introduce gas into the intake pipe 72, so that the air pressure inside the gas guide cylinder 71 increases. Among them, a part of the gas will be diverted into the flow dividing cylinder 74, and the other part is discharged from the outlet pipe 73 and introduced into the cylinder of the lifting device 3. This can avoid the problem that all the gas is introduced into the cylinder of the lifting device 3, resulting in excessive air pressure inside the cylinder of the lifting device 3 and causing it to explode. After the gas is introduced into the flow dividing cylinder 74, the air pressure will increase, which causes the piston 75 to move downward under the action of the air pressure to expand the volume of the flow dividing cylinder 74, thereby achieving a buffering effect. When the air pressure inside the flow dividing cylinder 74 is too high, at this time, the piston 75 applies pressure to the first spring 76 to completely compress it, so that the piston 75 slides below the pressure relief pipe 77, which causes the gas inside the flow dividing cylinder 74 to be discharged from the pressure relief pipe 77. The entire structure can achieve pressure division of the air pressure in the cylinder of the lifting device 3 and realize the protection function of the cylinder of the lifting device 3.

[0026] Furthermore, a pressing mechanism 8 is provided at the top end of the winding drum 4. The pressing mechanism 8 includes a mounting plate 81. One end of the mounting plate 81 is fixedly connected with a slider 83. The slider 83 is slidably connected to the inner wall of the housing 1. A chute 85 matching the slider 83 is formed on the outside of the housing 1. The slider 83 can slide vertically along the chute 85. A pressing member 82 for pressing the steel wire rope 5 is provided at the bottom of the mounting plate 81. A pressing member 84 is provided at the end of the slider 83 away from the mounting plate 81, which drives the pressing member 82 to disengage from the steel wire rope 5 by cooperating with the rotation of the winding drum 4.

[0027] Furthermore, the pressing member 82 includes a socket 821 fixedly connected to the bottom of the mounting plate 81. A movable seat 822 is slidably connected to the bottom end of the socket 821. A pressing plate 823 is fixedly connected to the bottom of the movable seat 822. The bottom surface of the pressing plate 823 abuts against the steel wire rope 5. A guiding block 824 is slidably connected to the inside of the socket 821. The bottom end of the guiding block 824 is fixedly connected to the top end of the movable seat 822. A second spring 825 is sleeved on the top end inside the socket 821. The top end of the second spring 825 abuts against the top wall of the socket 821. The bottom end of the second spring 825 abuts against the guiding block 824. When the winding drum 4 is stationary, a pressing force is applied to the steel wire rope 5 through the pressing plate 823, and the second spring 825 can make the pressing plate 823 elastically contact the steel wire rope 5. This can not only ensure that the pressing plate 823 presses the steel wire rope 5 to avoid the problem of loosening and winding of the steel wire rope 5, but also prevent the problem of excessive pressing force of the pressing plate 823 on the steel wire rope 5 causing wear to the steel wire rope 5.

[0028] Furthermore, the pressing member 84 includes a top rod 841. The top end of the top rod 841 is rotatably connected to the slider 83 through a pin shaft. A torsion spring 842 is sleeved on the pin shaft of the top rod 841. One end of the torsion spring 842 is welded to the slider 83, and the other end of the torsion spring 842 is welded to the top rod 841. A gear 844 is coaxially and fixedly connected to one end of the winding drum 4. The bottom end of the top rod 841 is slidably engaged with the tooth groove of the gear 844. A third spring 843 is welded to the top wall of the chute 85. The bottom end of the third spring 843 is welded to the slider 83.

[0029] Working principle: The gas is introduced into the inside of the intake pipe 72 through the air pump 2, so that the air pressure inside the air guide cylinder 71 increases. Among them, a part of the gas will be shunted into the inside of the shunt cylinder 74, and the other part is discharged from the outlet pipe 73 and introduced into the cylinder of the lifting device 3. This can avoid the problem that all the gas is introduced into the cylinder of the lifting device 3, resulting in excessive air pressure inside the cylinder of the lifting device 3 and causing it to explode.

[0030] The pressing plate 823 can press the steel wire rope 5 when the reel 4 is stationary to prevent the steel wire rope 5 from loosening and getting entangled. The reel 4 is driven by the lifting device 3 to wind or release the steel wire rope 5, causing the gear 844 to rotate synchronously. This causes the gear 844 to exert a thrust on the ejector rod 841, causing the ejector rod 841 to push the slider 83 upward, and thus causing the mounting plate 81 to drive the entire pressing member 82 to move upward and disengage from the steel wire rope 5. This can prevent sliding friction between the steel wire rope 5 and the pressing member 82, thereby increasing the wear of the steel wire rope 5.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An explosion-proof pneumatic hoist for mines, comprising a housing (1), one end of the housing (1) is fixedly connected to an air pump (2), a lifting device (3) is fixedly connected to the middle of the housing (1), and an output shaft of the lifting device (3) is fixedly connected to a drum (4) for winding a steel wire rope (5), characterized in that, The air outlet of the air pump (2) is connected to a pressure dividing mechanism (7) through a conduit. The pressure dividing mechanism (7) includes a gas guide cylinder (71). The gas guide cylinder (71) is fixedly connected to the outside of the air pump (2). One end of the gas guide cylinder (71) is fixedly connected to an intake pipe (72) that is connected to the air outlet of the air pump (2). The other end of the gas guide cylinder (71) is fixedly connected to an outlet pipe (73) that is connected to the intake port of the lifting device (3). The bottom of the gas guide cylinder (71) is fixedly connected to a flow dividing cylinder (74). The top end inside the flow dividing cylinder (74) is slidably connected to a piston (75). The bottom end of the piston (75) is welded with a first spring (76). The bottom end of the first spring (76) is welded to the bottom wall of the flow dividing cylinder (74). The bottom end of the flow dividing cylinder (74) is fixedly connected to a pressure relief pipe (77).

2. The explosion-proof pneumatic hoist for mining according to claim 1, characterized in that, In the initial state of the first spring (76), the piston (75) is located above the pressure relief pipe (77). In the fully compressed state of the first spring (76), the piston (75) is located below the pressure relief pipe (77).

3. The explosion-proof pneumatic hoist for mining according to claim 1, characterized in that, A pressing mechanism (8) is provided at the top end of the winding drum (4). The pressing mechanism (8) includes a mounting plate (81). One end of the mounting plate (81) is fixedly connected to a slider (83). The slider (83) is slidably connected to the inner wall of the housing (1). A pressing member (82) for pressing the wire rope (5) is provided at the bottom of the mounting plate (81). A pressing member (84) is provided at one end of the slider (83) away from the mounting plate (81) to drive the pressing member (82) to disengage from the wire rope (5) by cooperating with the rotation of the winding drum (4).

4. The explosion-proof pneumatic hoist for mine use according to claim 3, characterized in that, The pressing member (82) includes a socket (821) fixedly connected to the bottom of the mounting plate (81). The bottom end of the socket (821) is slidably connected to a movable seat (822). The bottom of the movable seat (822) is fixedly connected to a pressing plate (823). The bottom surface of the pressing plate (823) abuts against the wire rope (5).

5. The explosion-proof pneumatic hoist for mine use according to claim 4, characterized in that, The pressing member (82) further includes a guide block (824) slidably connected inside the socket (821). The bottom end of the guide block (824) is fixedly connected to the top end of the movable seat (822). A second spring (825) is sleeved at the top end inside the socket (821). The top end of the second spring (825) abuts against the top wall of the socket (821). The bottom end of the second spring (825) abuts against the guide block (824).

6. The explosion-proof pneumatic hoist for mine according to claim 3, characterized in that, A chute (85) matching the slider (83) is provided on the outside of the housing (1). The slider (83) can slide vertically along the chute (85).

7. The explosion-proof pneumatic hoist for mine use according to claim 6, characterized in that The pressing member (84) includes a ejector rod (841). The top end of the ejector rod (841) is rotatably connected to the slider (83) by a pin shaft. A torsion spring (842) is sleeved on the pin shaft of the ejector rod (841). One end of the torsion spring (842) is welded to the slider (83), and the other end of the torsion spring (842) is welded to the ejector rod (841). One end of the reel (4) is coaxially and fixedly connected with a gear (844). The bottom end of the ejector rod (841) is in sliding fit with the tooth groove of the gear (844).

8. The explosion-proof pneumatic hoist for mine use according to claim 7, characterized in that, The pressing member (84) further includes a third spring (843). The top end of the third spring (843) is welded to the top wall of the chute (85), and the bottom end of the third spring (843) is welded to the slider (83).

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