CN2239501Y

CN2239501Y - Piston clay bit

Info

Publication number: CN2239501Y
Application number: CN 96203164
Authority: CN
Inventors: 张吉利
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-26
Filing date: 1996-01-26
Publication date: 1996-11-06
Anticipated expiration: 2006-01-26

Abstract

The utility model belongs to a drill bit for clay soil. A connector 1 is fixed on the outside of one end of a cylinder 4. The wall 6 of the cylinder is provided with a square hole. A groove 2 which forms slide fit with an upper cover 7 of a plunger is correspondingly fixed on the wall 6 of the cylinder. The wall 6 of the cylinder wall forms slide fit with a plunger body 3. An integral sample can be taken out easily without dismounting the drill bit. The utility model has simple structure.

Description

Piston type clay drill bit

The utility model relates to the used drill bit of a kind of engineering geology and hydrogeological prospecting field, belongs to the drill bit that cohesive soil is used.

At present, in hydrogeology prospecting sampling process, often run into the phenomenon that chisel bit deflects, and sample is difficult for taking out when meeting cohesive soil, has both made the taking-up soil sample, also destroys complete sample in the cavity of drill bit.

The purpose of this utility model is to avoid above-mentioned deficiency of the prior art, and a kind of piston type clay drill bit of easy sampling is provided.

The purpose of this utility model can reach by the following technical programs: tube one end external fixation connector, have square hole and the corresponding fixing groove that is slidingly matched with the piston loam cake at barrel, and barrel and piston body are for being slidingly matched.The utility model can have following effect than above-mentioned prior art: owing to have square hole and the corresponding fixing groove that is slidingly matched with the piston loam cake at barrel, and barrel and piston body are for being slidingly matched, when sampling, from hole push piston loam cake piston body is slided with a baffle plate along barrel, need not unload drill bit and can take out intact sample.

Accompanying drawing 1 is the utility model structure chart;

Accompanying drawing 2 is the figure that cut open of accompanying drawing 1A-A.

Below with the utility model is described in further detail: should at first jump bit on the engineering geological drilling rig and connector 1 be fixed by screw thread when using this drill bit, it is underground that power by jump bit is crept into drill bit, soil sample enters sampling tube 4, and the promotion piston slides to the other end of tube 4 along barrel 6, block an end of groove 2 until limiting plate 5, finish sampling; When sample is taken out in tube 4, only need a baffle plate to go out insertion, promote piston loam cake 7 piston body 3 is slided along barrel 6, soil sample is skidded off automatically (because limiting plate 5 blocks the other end of groove 2 from the hole, make that the piston body 3 unlikely tubes 4 that skid off are outer), and the integrality of maintenance soil sample.

Claims

1, a kind of piston type drill bit is characterized in that: (4) one an end external fixation connector (1), have square hole and the corresponding fixing groove (2) that is slidingly matched with piston loam cake (7) at barrel (6), and barrel (6) and piston body (3) are for being slidingly matched.