CN201300403Y - Flow drum of hand held hydraulic break pickaxe - Google Patents

Abstract

A flow drum of hand held hydraulic break pickaxe is characterized in that the whole outer surface of the flow drum is in cylinder form; the cylinder outer surface is only provided with high pressure oil holes; and the wall of the flow drum is provided with low pressure oil holes. The utility model changes the clearance seal manner between the outer cylinder drum and the flow drum from dynamic seal into static seal, thereby completely eliminating the break efficiency reduction of hydraulic pickaxe caused by the communication between high pressure oil and low pressure oil when the surface is abraded or incorrect assembly.

Description

Flow tube in the hand-held type hydraulic breakup pick

Technical field

The utility model relates to engineering machinery, the version of flow tube in the hand-held type hydraulic breakup pick of more specifically saying so.

Background technology

As shown in Figure 1 and Figure 2, hydraulic breakup pick drives the fragmentation work that can efficiently finish concrete, pitch, rock by hydraulic power station, and it mainly is made up of handle 1, last pick body 2, outer cylinder 8, following pick body 9 and flexible pipe tail pigtail 10; Wherein, in last pick body 2, be provided with members such as nitrogen bag 6, bat-handle switch valve and valve plate 3, in outer cylinder 8, be provided with impact piston 5, hydraulicchange-over valve 4, flow tube 7 etc.

The flow tube 7 of Hydraulic pick is to be assemblied in the outer cylinder 8, top engages with hydraulicchange-over valve 4, the bottom engages with following pick body 9, its inside is installed with impact piston 5, it mainly acts on is that hydraulic oil moves up and down impact piston 5 for the top or the bottom fuel feeding of impact piston 5 by its inner oil groove, thereby hits the broken road surface of pick rod.

As shown in Figure 3, Figure 4, in the prior art, the flow tube 7 that is equipped with in outer cylinder 8 is set to cylindrical tube, mills out the flat high-pressure oil duct of twice in its excircle upper end symmetry and is communicated with high pressure oilhole 23; Simultaneously become 90 ° to locate to mill out flat low pressure oil duct in the excircle bottom with high-pressure oil duct, the low pressure oil duct is connected with low pressure oilhole 24, and " O " RunddichtringO 25 is used for the connection between last pick body and the outer cylinder is sealed.There is following defective in this version:

1, existing high pressure oilhole 23 on the outer surface circumference of flow tube 7 has low pressure oilhole 24 again, and only reliable flow tube 7 cooperates with the high accuracy of outer cylinder 8 could guarantee that high and low pressure oil do not gang up.The machining accuracy of these convection current graduated cylinder 7 excircles and outer cylinder 8 inner surface circumference and quality of fit require very high, and the required precision of assembling is also high.

2, break down after maintenance at product,, let out in high-low pressure oil duct or oilhole being ganged up cause, thereby the Hydraulic pick crushing efficiency is reduced greatly, even do not have hitting power because of equipment uses parts surface wearing and tearing or the assembling a little cause improper.

The utility model content

The utility model is for avoiding above-mentioned existing in prior technology weak point, flow tube in a kind of hand-held type hydraulic breakup pick is provided, the clearance seal mode that cooperates between outer cylinder and the flow tube is changed over static seal by movable sealing, thereby thoroughly solve the problem of " causing high-low pressure oil to gang up because of surface abrasion or assembling a little are improper reduces the crushing efficiency of Hydraulic pick greatly ".

The utility model technical solution problem adopts following technical scheme:

The design feature of flow tube is to be provided with that the outer surface of flow tube is whole to become cylinder type in the utility model hand-held type hydraulic breakup pick, and the outer surface of cylinder type only has the high pressure oilhole, is provided with simultaneously in the barrel that the low pressure oilhole is in the flow tube.

The utility model is that the clearance seal mode that will cooperate between outer cylinder and the flow tube changes over static seal by movable sealing, and compared with the prior art, the utility model beneficial effect is embodied in:

1, the utility model effectively avoided between the flow tube outer surface high-low pressure oil because of the part of appliance wearing and tearing cause gang up may, thereby solved the defective that causes the instrument impulsive force to reduce after high-low pressure oil that original product exists is ganged up;

2, the utility model has solved the fitted seal problem between flow tube and the outer cylinder, only needs to install static seal additional at the outer cylinder outer wall and prevents to leak and get final product, thereby reduced the inner surface requirement on machining accuracy of outer cylinder, enhances productivity;

3, the utility model has reduced the assembly precision requirement, improves assembling and maintenance efficiency, convenient for maintaining;

4, the utility model is found during dismounting to leak in maintenance, only needs to change sealing ring, thereby has thoroughly solved " causing high-low pressure oil to gang up because of surface abrasion or assembling a little are improper reduces the crushing efficiency of Hydraulic pick greatly " this root problem.

Description of drawings

Fig. 1 is the Hydraulic pick structural representation.

Fig. 2 is a Hydraulic pick internals decomposing schematic representation.

Label among Fig. 1, Fig. 2: pick body on 1 handle, 2,3 valve plates, 4 hydraulicchange-over valves, 5 impact pistons, 6 nitrogen bags, 7 flow tubes, 8 outer cylinders, 9 times pick bodies, 10 flexible pipe tails are distinguished.

Fig. 3 is Hydraulic pick outer cylinder and flow tube fit structure schematic diagram.

Fig. 4 is the flow barrel structure schematic diagram in the prior art.

Fig. 5 is a flow barrel structure schematic diagram in the utility model.

Label among Fig. 3, Fig. 4 and Fig. 5: 8 outer cylinders, 7 flow tubes, 23 high pressure oilholes, 24 low pressure oilholes, 25 are " O " RunddichtringO.

Below pass through the specific embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.

The specific embodiment

Referring to Fig. 3, Fig. 5, the whole one-tenth of the outer surface cylinder type of flow tube 7 is set, the outer surface of cylinder type only has high pressure oilhole 23, places on the flow tube lateral wall apart from 3/4 position, upper end; Be provided with simultaneously in the barrel that low pressure oilhole 24 is in flow tube 7, " O " RunddichtringO 25 of outer cylinder 8 peripheries is used for sealing is implemented in the connection between last pick body and the outer cylinder; Quality of fit between outer cylinder and the flow tube will remain on ± 5/1000mm in.

Valve plate, hydraulicchange-over valve and flow tube connect successively in the structure of Hydraulic pick, in order to guarantee that each corresponding oilhole can correspondence communicate, higher linearity when being fitted together, hydraulicchange-over valve and flow tube is arranged, so outer cylinder 8 is installed on the cylindrical circumference of hydraulicchange-over valve and flow tube; In order not allow hydraulic oil, on the cylindrical circumference of outer cylinder, processed a rectangular channel simultaneously, as long as in oil groove, add " O " RunddichtringO 25 to external leakage.

Claims (1)

1, flow tube in the hand-held type hydraulic breakup pick is characterized in that the outer surface integral body that flow tube (7) is set becomes cylinder type, and the outer surface of cylinder type only has high pressure oilhole (23), low pressure oilhole (24) is set simultaneously is in the barrel of flow tube (7).

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