Piston rod locking device for overhauling electro-hydraulic hammer

Abstract

A piston rod locking device for electro-hydraulic hammer maintenance belongs to the technical field of electro-hydraulic hammer maintenance equipment and is used for locking a piston rod during electro-hydraulic hammer maintenance. According to the technical scheme, a flange plate is a disc and provided with a center round hole, flange holes are evenly distributed in the circumference of the flange plate, and the diameter of the center round hole of the flange plate is matched with that of a piston rod. A supporting plate is a rectangular plate and located below the flange plate, and the flange plate is connected with the supporting plate in a welded mode. The lower ends of the two pull rods are perpendicularly welded to the two ends of the supporting plate respectively, fixing rings are welded to the two sides of the piston cylinder respectively, and the upper ends of the two pull rods penetrate through the fixing rings to be connected with fixing nuts. The hydraulic cylinder is simple in structure and convenient to use, only the hammerhead needs to be dismantled during maintenance, the piston rod, the main cylinder, the auxiliary piston and the buffering cylinder do not need to be dismantled, the maintenance workload is greatly reduced, the maintenance labor intensity is reduced, the maintenance time is shortened, and the maintenance work efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to a piston rod locking device used in the overhaul of an electro-hydraulic hammer, belonging to the technical field of electro-hydraulic hammer overhaul equipment. Background Technique

[0002] The electro-hydraulic hammer is a newly developed new device in recent years. During the working process, it adopts oil-draining type striking and requires links such as pneumatic drive and hydraulic energy storage. The pressure of the electro-hydraulic hammer is generally between 12-13 Mpa. To ensure safe and efficient operation, when overhauling a 3T electro-hydraulic hammer using traditional methods, it is necessary to remove the buffer cylinder, main cylinder, auxiliary piston, piston rod, and hammer head. This overhaul method not only has a high labor intensity for workers, but also has a long overhaul time, generally about 9 days. Therefore, it is very necessary to improve the existing electro-hydraulic hammer overhaul method. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a piston rod locking device for the overhaul of an electro-hydraulic hammer. When using this piston rod locking device for overhaul, only the hammer head needs to be removed, and there is no need to remove the piston rod, main cylinder, auxiliary piston, and buffer cylinder, which can effectively reduce the labor intensity of overhaul, shorten the overhaul time, and improve the overhaul work efficiency.

[0004] The technical solution to solve the above technical problem is:

[0005] A piston rod locking device for the overhaul of an electro-hydraulic hammer, which includes a flange plate, a support plate, a pull rod, and a fixing nut. The flange plate is a disc with a central circular hole. The flange holes are evenly distributed on the circumference of the flange plate. The diameter of the central circular hole of the flange plate matches the diameter of the piston rod. The support plate is a rectangular plate located below the flange plate, and the flange plate is welded to the support plate. The pull rod is a long rod, the upper part of the pull rod is a screw rod, and the lower ends of the two pull rods are respectively perpendicularly welded to the two ends of the support plate. Fixed rings are respectively welded on both sides of the piston cylinder, and the upper ends of the two pull rods pass through the fixed rings and are connected to the fixing nut.

[0006] The above-mentioned piston rod locking device for the overhaul of an electro-hydraulic hammer further includes a piston rod clamp. The piston rod clamp is composed of side plates, clamping plates, locking bolts, and locking nuts. The side plates are rectangular plates, the plate surfaces of the two side plates are parallel and opposite to each other. Horizontally clamping plates are respectively perpendicularly welded to the upper and lower parts of the opposite plate surfaces of the two side plates. The opposite sides of the four clamping plates are respectively arc-shaped, and the radian of the arc is matched with the outer circumference diameter of the piston rod. The four clamping plates respectively clamp the two sides of the piston rod up and down. Bolt holes are respectively arranged at both ends of the two side plates, and the two locking bolts pass through the bolt holes and are locked and connected by the locking nuts.

[0007] The beneficial effect of the utility model is:

[0008] The flange of the utility model can be sleeved on the piston rod after the hammer head at the lower end of the piston rod is removed. The supporting plate abuts against the lower end of the piston rod, and the steel wire rope can lift the piston rod through the flange hole of the flange to prevent the piston rod from falling. The upper end of the pull rod is connected to the fixing rings on both sides of the piston rod, which can position the flange and the supporting plate and lift the piston rod. The piston rod clamp is clamped on the piston rod to prevent the piston rod from swinging left and right, front and back and for auxiliary fixing.

[0009] The utility model has the advantages of simple structure and convenient use. During maintenance, only the hammer head needs to be removed, and there is no need to remove the piston rod, the main cylinder, the auxiliary piston and the buffer cylinder, which greatly reduces the maintenance workload, reduces the labor intensity of maintenance, shortens the maintenance time, saves nearly 6 days compared with the traditional maintenance method, and significantly improves the maintenance work efficiency. Brief Description of the Drawings

[0010] Figure 1 is a schematic structural view of the utility model;

[0011] Figure 2 is a schematic structural view of the flange, the supporting plate, the pull rod and the fixing nut;

[0012] Figure 3 is a schematic structural view of the piston rod clamp.

[0013] The marks in the figure are as follows: piston cylinder 1, piston rod 2, flange 3, central round hole 4, flange hole 5, supporting plate 6, pull rod 7, fixing nut 8, piston rod clamp 9, side plate 10, clamping plate 11, locking bolt 12, locking nut 13. Detailed Description of the Invention

[0014] The utility model is composed of a flange 3, a supporting plate 6, a pull rod 7, a fixing nut 8 and a piston rod clamp 9.

[0015] Figure 1 、 2 As shown, the flange 3 is a disc, the flange 3 has a central round hole 4, the diameter of the central round hole 4 of the flange 3 matches the diameter of the piston rod 2. During use, the flange 3 can be sleeved on the piston rod 2 after the hammer head at the lower end of the piston rod 2 is removed. The flange holes 5 are evenly distributed on the circumference of the flange 3, and the steel wire rope can lift the flange 4 upward through the flange holes 5.

[0016] Figure 1 、 2It is shown that the support plate 6 is a rectangular plate, the support plate 6 is located below the flange 4, and the flange 5 is welded to the support plate 6. The pull rod 7 is a long rod, the upper part of the pull rod 7 is a screw rod, and the lower ends of the two pull rods 7 are respectively perpendicularly welded to the two ends of the support plate 6. Fixed rings are respectively welded on both sides of the piston cylinder 1. The upper ends of the two pull rods 7 pass through the fixed rings and are connected to the fixing nuts 8. The two pull rods 7 can lift the support plate 6 and the flange 3 fixed on the support plate 6 upward, and the pull rods 7 are fixed by the fixing nuts 8.

[0017] Figure 1 , 3 It is shown that the piston rod clamp 9 is composed of side plates 10, clamping plates 11, locking bolts 12 and locking nuts 13. The side plates 10 are rectangular plates, the plate surfaces of the two side plates 10 are parallel and opposite to each other. Horizontally arranged clamping plates 11 are respectively perpendicularly welded to the upper and lower parts of the opposite plate surfaces of the two side plates 10. The opposite sides of the four clamping plates 11 are respectively arc-shaped, and the radian of the arc is matched with the circumferential outer diameter of the piston rod 2. The four clamping plates 11 respectively clamp the two sides of the piston rod 2 from top and bottom. Bolt holes are respectively arranged at both ends of the two side plates 10. The two locking bolts 12 pass through the bolt holes and are locked and connected by the locking nuts 13. During use, the piston rod clamp 9 clamps on the piston rod 2 to prevent the piston rod 2 from swinging in the left-right and front-back positions, and the piston rod clamp 9 plays an auxiliary fixing role.

[0018] The utility model can complete the following maintenance work:

[0019] 1. Replace the piston rod seal of the electro-hydraulic hammer;

[0020] 2. Replace the easily worn parts such as the lower plug and connecting plug of the electro-hydraulic hammer;

[0021] 3. Check and troubleshoot the air leakage fault of the electro-hydraulic hammer,

[0022] 4. Replace the lower anvil block of the electro-hydraulic hammer and adjust the clearance of the lower anvil block;

[0023] 5. Conduct daily maintenance and upkeep on the fixed track of the electro-hydraulic hammer head.

[0024] The using process of the utility model is as follows:

[0025] When performing the maintenance operation on the electro-hydraulic hammer, first strike the lifting hammer (i.e., the piston rod makes a lifting hammer movement upward), release all the nitrogen, and remove the hammer head, connecting plug and connecting pipe;

[0026] Then, place the lower end of the piston rod 2 into the central circular hole 4 of the flange 3 above the support plate 6. The plate surface of the support plate 6 abuts against the lower end surface of the piston rod 2. The upper ends of the two pull rods 7 pass through the fixed rings and are connected to the fixing nuts 8;

[0027] Then, thread two steel wire ropes through the flange holes of the flange plate 3. The overhead crane hook lifts the flange plate 3 and the support plate 6 through the steel wire ropes. The plate surface of the support plate 6 supports the lower end of the piston rod 2 to prevent the piston rod 2 from falling. Remove the lower plug, connecting plug, and the piston rod bolts and nuts.

[0028] Then, clamp the two side plates 11 of the piston rod clamp 9 on both sides of the piston rod 2 from top and bottom respectively. Two locking bolts 12 pass through the bolt holes of the two side plates 10 of the piston rod clamp 9 and are locked and connected by locking nuts 13. The piston rod clamp 9 plays an auxiliary fixing role, that is, it prevents the piston rod from swinging left, right, front, and back and provides clamping and auxiliary fixing.

[0029] The piston rod 2 is fixed by the upper fixing nut 8 of the fastening pull rod 7 to prevent it from falling. Remove the flange plate 3 and the support plate 6, and then remove part of the lower plug for maintenance operations.

[0030] When replacing the damaged parts of the lower plug and the connecting plug, use the flange plate 3 and the support plate 6 to fix the lower end of the piston rod to prevent the piston rod from falling. After the lower plug part is installed in place, the fixing nut 8 at the upper end of the fastening pull rod 7 raises the piston rod 2, and then install the hammer head to complete the maintenance operation.

[0031] An embodiment of the present utility model is as follows:

[0032] The diameter of the flange plate 3 is 235 mm, the thickness is 40 Mm, and the diameter of the central circular hole 4 is 185 mm;

[0033] The length of the support plate 6 is 580 mm, the width is 110 mm, and the thickness is 50 mm;

[0034] The diameter of the pull rod 7 is 25 mm, and the length is 750 mm;

[0035] The length of the side plate 10 of the piston rod clamp 9 is 200 mm, the width is 100 mm, and the thickness is 5 mm. The length of the clamping plate 11 is 80 mm, the width is 35 mm, the diameter of the locking bolt 12 is 12.5 mm, and the length is 150 mm.

Claims

1. A piston rod locking device for the overhaul of an electro-hydraulic hammer, characterized in that: It includes a flange (3), a support plate (6), a pull rod (7), and a fixing nut (8). The flange (3) is a disc with a central circular hole (4). The flange holes (5) are evenly distributed around the circumference of the flange (3). The diameter of the central circular hole (4) of the flange (3) matches the diameter of the piston rod (2). The support plate (6) is a rectangular plate and is located below the flange (3). The flange (3) is welded to the support plate (6). The pull rod (7) is a long rod with a thread at its upper part. The lower ends of the two pull rods (7) are perpendicularly welded to the two ends of the support plate (6) respectively. Fixed rings are welded to both sides of the piston cylinder (1). The upper ends of the two pull rods (7) pass through the fixed rings and are connected to the fixing nut (8).

2. The piston rod locking device for the overhaul of the electro-hydraulic hammer according to claim 1, characterized in that: It also has a piston rod clamp (9). The piston rod clamp (9) consists of side plates (10), clamping plates (11), locking bolts (12), and locking nuts (13). The side plates (10) are rectangular plates. The plate surfaces of the two side plates (10) are parallel and opposite to each other. Horizontally arranged clamping plates (11) are perpendicularly welded to the upper and lower parts of the opposite plate surfaces of the two side plates (10) respectively. The opposite sides of the four clamping plates (11) are respectively arc-shaped, and the radian of the arc is matched with the outer circumference diameter of the piston rod (2). The four clamping plates (11) clamp the two sides of the piston rod (2) from top and bottom respectively. Bolt holes are provided at both ends of the two side plates (10). The two locking bolts (12) pass through the bolt holes respectively and are locked and connected by the locking nuts (13).

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