Hydraulic buffer of coal gangue separation device

Abstract

The present invention relates to a hydraulic buffer for a coal gangue separation device, belonging to the field of coal gangue screening equipment. The technical solution adopted by the present invention is as follows: It includes a buffer rod body, one end of the buffer rod body is provided with a piston, and the other end is provided with a guide plunger. A first buffer spring is sleeved on the buffer rod body; the inside of the guide cylinder is a hollow guide stroke hole, one end of the guide cylinder is open and provided with a guide end cover. The guide plunger of the buffer rod body is located in the guide stroke hole of the guide cylinder, and the buffer rod body passes through the end cover hole on the guide end cover. The first buffer spring is located between the guide plunger and the guide end cover, and the other end of the guide cylinder is provided with a guide hinge hole; the hydraulic buffer cylinder is provided with a buffer oil cavity, and the piston of the buffer rod body is located in the buffer oil cavity. The advantages of the present invention are as follows: It solves the wear problem at the mechanical collision limit position during coal gangue screening; adopts double buffering of hydraulic pressure and spring, reduces the force condition of the collision screening equipment at the limit position, and improves the service life of the product.

Description

Technical Field

[0001] The invention relates to a hydraulic buffer of a gangue sorting device and belongs to the field of gangue screening equipment. Background Art

[0002] Screening of gangue in coal is a measure to improve the quality and efficiency of coal mines. In order to more effectively increase the calories of coal combustion, improve the quality and selling price of coal, it is necessary to screen the gangue of the mined coal.

[0003] When mechanical technology was not perfect, gangue screening was done manually, which required a lot of manpower and high experience. However, the labor cost was high, especially at present, and manual screening of gangue is no longer suitable for the current coal mining cost requirements.

[0004] Mechanical screening is to separate the gangue in coal by physical methods and then select it through mechanical equipment.

[0005] The current mechanical equipment for screening coal gangue uses cylinder equipment to collide the coal gangue into a high-speed coal flow. The collision screening equipment requires high-frequency collision actions. After using conventional screening and collision equipment for a period of time, there will be problems with severe wear at the extreme ends of the movement. Summary of the invention

[0006] The invention provides a hydraulic buffer for a gangue sorting device, which solves the problem of damage to the equipment caused by excessive impact load during the operation of the gangue screening equipment.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] Hydraulic buffer for gangue sorting device, including:

[0009] A buffer rod body, one end of which is provided with a piston, the other end of which is provided with a guide plunger, and the buffer rod body is sleeved with a first buffer spring;

[0010] A guide cylinder, wherein the guide cylinder has a hollow guide travel hole, one end of the guide cylinder is opened and provided with a guide end cover, the guide plunger of the buffer rod body is located in the guide travel hole of the guide cylinder, the buffer rod body passes through the end cover hole on the guide end cover, the first buffer spring is located between the guide plunger and the guide end cover, and the other end of the guide cylinder is provided with a guide hinge hole;

[0011] A hydraulic buffer cylinder is provided with a buffer oil chamber, the piston of the buffer rod body is in the buffer oil chamber, a hydraulic sealing end cover is provided at the end of the hydraulic buffer cylinder, the buffer rod body passes through the hydraulic sealing end cover, the side wall of the hydraulic buffer cylinder is provided with an oil channel and two oil holes connecting the front and rear positions of the buffer oil chamber, and the hydraulic buffer cylinder is provided with a buffer hinge hole at the other end.

[0012] Preferably, a second buffer spring is further provided on the buffer rod body, a protruding external spring limiter is provided in the middle of the buffer rod body, and the second buffer spring is located between the external spring limiter and the guide end cover of the guide cylinder.

[0013] Preferably, an oil cup is further provided on the hydraulic buffer cylinder, the oil cup is connected to the upper part of the oil channel, the oil cup, the oil channel and the buffer oil cavity are filled with hydraulic oil, and the highest liquid level of the hydraulic oil is in the oil cup.

[0014] Further preferably, the piston is located in a buffer oil chamber between the two oil holes.

[0015] Preferably, the oil channel has machined holes on the outer end face and side face of the hydraulic buffer cylinder, a sealing cover is provided at the position of the machined holes, and the buffer oil chamber has an anti-collision recess on the inner end face. The piston is fixed to the end face of the buffer rod body by bolts, and the bolts are embedded in the anti-collision recess when the end of the buffer rod body is close to the inner end of the buffer oil chamber.

[0016] Further preferably, the buffer rod body is composed of two solid rod bodies, the end located in the guide cylinder is the guide rod end, and the end located in the buffer oil chamber is the buffer rod end. The external spring limit is located at the outer end portion of the guide rod end, and the end surface of the external spring limit is provided with a connecting hole connected to the buffer rod end, and the circumferential surface of the external spring limit is provided with two symmetrical mounting surfaces.

[0017] Preferably, a guide connecting plate is fixedly provided at the end of the guide cylinder, on which the guide connecting plate is provided with the guide hinge hole, and a buffer connecting plate is provided at the end of the hydraulic buffer cylinder, on which the buffer hinge hole is provided.

[0018] The advantages of the present invention are: solving the problem of excessive impact load at the mechanical collision limit position in the screening of coal gangue damaging the equipment;

[0019] The use of hydraulic and spring dual buffering reduces the stress condition of the collision screening equipment at the extreme position and increases the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the overall structural view of this product.

[0021] Figure 2 is a cutaway view of the present invention,

[0022] Figure 3 is a side view of the present invention,

[0023] Figure 4 It is a structural diagram of the guide rod end of the buffer rod body of the present invention.

[0024] Reference numerals:

[0025] 1 buffer rod body 2 guide cylinder 3 hydraulic buffer cylinder 4 oil cup 101 guide rod end 102 buffer rod end 103 guide plunger 104 piston 105 first buffer spring 106 second buffer spring 107 external spring limit 108 mounting surface 201 guide stroke hole 202 guide end cover 203 guide hinge hole 204 guide connecting plate 301 buffer oil chamber 302 hydraulic sealing end cover 303 oil channel 304 oil hole 305 anti-collision concave 306 buffer connecting plate 307 buffer hinge hole 308 processing hole. DETAILED DESCRIPTION

[0026] The present invention is further described below:

[0027] The present invention relates to a hydraulic buffer for gangue separation device, the structure of which is as follows: Figure 1-3 As shown, it includes a buffer rod body 1, a guide cylinder 2, a hydraulic buffer cylinder 3 and an oil cup.

[0028] A piston 104 is provided at one end of the buffer rod body 1 , and a guide plunger 103 is provided at the other end. A first buffer spring 105 and a second buffer spring are sleeved on the buffer rod body 1 , and a protruding external spring limiter 107 is provided in the middle of the buffer rod body 1 .

[0029] The guide cylinder 2 has a hollow guide travel hole 201, and one end of the guide cylinder 2 is opened to provide a guide end cap 202. The guide plunger 103 of the buffer rod body 1 is located in the guide travel hole 201 of the guide cylinder 2. The buffer rod body 1 passes through the end cap hole on the guide end cap 202. The first buffer spring 105 is located in the guide travel hole 201 and is arranged between the guide plunger 103 and the guide end cap 202. A guide connecting plate 204 is fixedly provided at the end of the guide cylinder 2, and a guide hinge hole 203 is provided on the guide connecting plate 204. The guide hinge hole 203 is hingedly connected to the screening swing rod of the gangue screening structure through a pin.

[0030] The hydraulic buffer cylinder 3 is provided with a buffer oil chamber 301, and the piston 104 of the buffer rod body 1 is located in the buffer oil chamber 301. The hydraulic buffer cylinder 3 is provided with a hydraulic sealing end cover 302 at the open end of the buffer oil chamber 301, and the buffer rod body 1 passes through the hydraulic sealing end cover 302. The side wall of the hydraulic buffer cylinder 3 is provided with an oil passage 303 and two oil holes 304 connecting the front and rear positions of the buffer oil chamber 301, and the piston 104 moves in the buffer oil chamber 301 between the two oil holes 304. The non-open end of the hydraulic buffer cylinder 3 is provided with a buffer connection plate, and the buffer connection plate is provided with a buffer hinge hole.

[0031] The second buffer spring 106 is located between the external spring limiter 107 and the guide end cover 202 of the guide cylinder 2 .

[0032] An oil cup 4 is also provided on the hydraulic buffer cylinder 3 . The oil cup 4 is connected to the upper part of the oil passage 303 . Hydraulic oil is poured into the oil cup 4 , the oil passage 303 and the buffer oil chamber 301 . The highest liquid level of the hydraulic oil is in the oil cup 4 .

[0033] The oil channel 303 is machined with holes on the outer end face and side face of the hydraulic buffer cylinder 3, a sealing cover is provided at the position of the machined hole, the buffer oil chamber 301 is provided with an anti-collision recess 305 on the inner end face, the piston 104 is fixed to the end face of the buffer rod body 1 by bolts, and when the end of the buffer rod body 1 is close to the inner end of the buffer oil chamber 301, the bolts are embedded in the anti-collision recess 305.

[0034] The buffer rod body 1 is composed of two solid rod bodies, which is convenient for processing and reduces the processing difficulty. The end in the guide tube 2 is the guide rod end 101, and the end in the buffer oil chamber 301 is the buffer rod end 102. The external spring limiter 107 is located at the outer end of the guide rod end 101. The end surface of the external spring limiter 107 is provided with a connecting hole connected to the buffer rod end 102. The peripheral surface of the external spring limiter 107 is provided with two symmetrical mounting surfaces, which is convenient for disassembly and installation using a wrench.

[0035] When the device is in use, as the sorting plate swings to the farthest position, the piston in the hydraulic buffer cylinder 3 moves toward the end cover. Figure 2 In the process, the hydraulic oil enters the oil channel from the buffer oil chamber 301 on the left side of the piston through the oil hole, and then enters the buffer oil chamber 301 on the right side of the piston through the oil channel. The flow of hydraulic oil in this process can slow down the movement speed of the buffer rod body, reduce the acceleration of the sorting plate rocker arm in the extreme motion position, and reduce the impact force generated by the swing of the sorting plate.

[0036] At the same time, the first buffer spring of the guide cylinder 2 is compressed when it swings to the farthest position with the sorting plate. At this time, the buffer rod body 1, the guide cylinder 2 and the hydraulic buffer cylinder 3 are at their longest overall position. The compressed first buffer spring and the hydraulic buffer cylinder 3 simultaneously play the function of buffering the acceleration of the sorting plate movement.

[0037] When the buffer rod 1 swings with the sorting plate to the shortest length, the piston in the hydraulic buffer cylinder 3 moves inward, such as Figure 2 In the process, the hydraulic oil enters the oil channel from the buffer oil chamber 301 on the right side of the piston through the oil hole, and then enters the buffer oil chamber 301 on the left side of the piston through the oil channel. The flow of hydraulic oil in this process can slow down the retraction speed of the buffer rod body and reduce the speed of the sorting plate at the extreme movement position. At the same time, the second buffer spring on the buffer rod body 1 is compressed by the guide cylinder 2 to buffer the movement speed of the sorting plate.

[0038] The present invention adopts hydraulic pressure and spring dual buffering to reduce the stress condition of the equipment at the extreme position and prolong the service life of the product.

Claims

1. A hydraulic buffer for a coal gangue separation device, characterized in that, it includes, a buffer rod body (1), one end of the buffer rod body (1) is provided with a piston (104), and the other end is provided with a guide plunger (103); a guide cylinder (2), the inside of the guide cylinder (2) is a hollow guide stroke hole (201), one end of the guide cylinder (2) is provided with an open guide end cover (202), the guide plunger (103) of the buffer rod body (1) is located in the guide stroke hole (201) of the guide cylinder (2), the buffer rod body (1) passes through the end cover hole on the guide end cover (202), and the other end of the guide cylinder (2) is provided with a guide hinge hole (203); a hydraulic buffer cylinder (3), the hydraulic buffer cylinder (3) is provided with a buffer oil cavity (301), the piston (104) of the buffer rod body (1) is located in the buffer oil cavity (301), the hydraulic buffer cylinder (3) is provided with a hydraulic seal end cover (302) at the end, the buffer rod body (1) passes through the hydraulic seal end cover (302), the side wall of the hydraulic buffer cylinder (3) is provided with an oil passage (303) and two oil holes (304) connecting the front and rear positions of the buffer oil cavity (301), and the hydraulic buffer cylinder (3) is provided with a buffer hinge hole at the other end; a first buffer spring (105) and a second buffer spring (106) are sleeved on the buffer rod body (1), the first buffer spring (105) is located between the guide plunger (103) and the guide end cover (202), a protruding external spring limit (107) is provided in the middle of the buffer rod body (1), and the second buffer spring (106) is located between the external spring limit (107) and the guide end cover (202) of the guide cylinder (2); an oil cup (4) is further provided on the hydraulic buffer cylinder (3), the oil cup (4) is connected to the upper part of the oil passage (303), the oil cup (4), the oil passage (303) and the buffer oil cavity (301) are filled with hydraulic oil, and the highest liquid level of the hydraulic oil is in the oil cup (4); the piston (104) moves in the buffer oil cavity (301) between the two oil holes (304); the oil passage (303) is provided with a machining hole on the outer end face and the side face of the hydraulic buffer cylinder (3), a sealing cover is arranged at the machining hole position, the buffer oil cavity (301) is provided with an anti-collision concave (305) on the inner end face, the piston (104) is fixed to the end face of the buffer rod body (1) by bolts, and when the end of the buffer rod body (1) is close to the inner end of the buffer oil cavity (301), the bolts are embedded in the anti-collision concave (305); the buffer rod body (1) is composed of two solid rod bodies, one end located in the guide cylinder (2) is a guide rod end (101), and one end located in the buffer oil cavity (301) is a buffer rod end (102), the external spring limit (107) is located at the outer end of the guide rod end (101), a connection hole is arranged on the end face of the external spring limit (107) and is connected to the buffer rod end (102), and two symmetric installation faces are arranged on the peripheral surface of the external spring limit (107); A guiding connection plate (204) is fixedly arranged at the end of the guiding cylinder (2). The guiding hinge hole (203) is arranged on the guiding connection plate (204). A buffer connection plate is arranged at the end of the hydraulic buffer cylinder (3), and a buffer hinge hole is arranged on the buffer connection plate; During use, when the sorting plate swings to the farthest end position, the piston (104) in the hydraulic buffer cylinder (3) moves towards the end cover direction. The hydraulic oil enters the oil passage (303) from the left buffer oil cavity (301) of the piston (104) through the oil hole, and then enters the buffer oil cavity (301) on the right side of the piston (104) through the oil passage (303). During the above process, the hydraulic oil flows, slowing down the movement speed of the buffer rod body, reducing the acceleration of the sorting plate swing rod at the extreme movement position, and reducing the impact force generated by the swing of the sorting plate; At the same time, when the first buffer spring (105) in the guiding cylinder (2) swings to the farthest end position along with the sorting plate, it is compressed. At this time, the buffer rod body (1), the guiding cylinder (2) and the hydraulic buffer cylinder (3) are at the overall longest. The compressed first buffer spring (105) and the hydraulic buffer cylinder (3) simultaneously function to buffer the acceleration of the movement of the sorting plate; When the buffer rod body (1) swings to the shortest length along with the sorting plate, the piston (104) in the hydraulic buffer cylinder (3) moves towards the inner direction. The hydraulic oil enters the oil passage (303) from the right buffer oil cavity (301) of the piston (104) through the oil hole, and then enters the buffer oil cavity (301) on the left side of the piston through the oil passage. During the above process, the hydraulic oil flows, which can slow down the retraction movement speed of the buffer rod body and reduce the speed of the sorting plate at the extreme movement position; at the same time, the second buffer spring on the buffer rod body (1) is compressed by the guiding cylinder (2) to buffer the movement speed of the sorting plate.

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