CN2695637Y

CN2695637Y - Small flow hydraulic impactor

Info

Publication number: CN2695637Y
Application number: CN 200420000413
Authority: CN
Inventors: 刘宝林
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-01-08
Filing date: 2004-01-08
Publication date: 2005-04-27
Anticipated expiration: 2014-01-08

Abstract

The utility model relates to a small flow hydraulic impactor used for sampling in the loose soft formation, mainly solving the problems that the sampling boring tool of the traditional hydraulic impactor is easy to flush the pore wall for great quality of flushing and fast current rate of upward movement. The utility model adopts the principle of work of the impactor of counteraction in valve type, and the reduction of the water consumption needed is implemented by a double springs difference water distribution mechanism and by decreasing the volume of the hydraulic cavity of the piston, so the flushing to the pore wall and the rock core by water power is reduced, achieving the purpose to improve the sampling efficiency, improve the sampling quality and maintain the pore wall. The utility model is mainly used for the core extracting or sampling work of loose soft formation, and is widely used for the field of the geological engineering of geological prospecting, the hydrographic and engineering geological prospecting and the environment geological sampling etc.

Description

The low discharge hydraulic impacter

(1) technical field under:

The utility model relates to a kind of low discharge hydraulic in-the-hole hammer (impactor) Sampling driller of coring, and the impact that especially is fit to loose soft formation is cored or sampling work.

(2) background technology:

Loose soft formation core or sampling work is the difficult point of geologic prospect, hydrogeology prospecting, engineering geologic investigation always, traditional sampling method has rotary method, churn method, vibratory drilling method etc.Rotary method adopts mud to make circulatory mediator usually, because slurry flows is arranged powder at the bottom of the hole, institute's sample thief is produced pollute or erosion easily, also is unfavorable for that hole wall is stable simultaneously; Though the churn sampling method need not or with quantity of fluid seldom, labor strength is big, sampling efficiency is low; Though the vibration sampling method overcomes the big shortcoming of labor strength, because vibration force is transmitted by drilling rod, energy loss is big, and capacity usage ratio is low; Down-the-hole hammer sampler impact force acts directly on probe tube top, the capacity usage ratio height, but traditional impactor is big to washing away of hole wall because the flushing liquid measure is big, is unfavorable for that hole wall is stable, and the low discharge impactor can overcome such shortcoming.

(3) summary of the invention:

Big in order to overcome the required flushing liquid measure of traditional impactor Sampling driller, wash away the drawback of hole wall easily, the utility model provides a kind of low discharge hydraulic impacter, this drilling tool not only has the characteristics of down-the-hole hammering blow auger, and the amount of the required scouring media of impactor is little, help the stable of loose soft formation borehole wall, improved sampling efficiency and sampling quality.

The technical scheme that its technical problem that solves the utility model adopts is: a impactor adopts valve formula reaction operating principle, promptly relies on the pressure of scouring media to promote block stamp piston act hammer, and the pressured spring reset that contracts impacts, and produces impact force; B reduces the volume in piston fluid power chamber with the minimizing water yield, thereby reduces dynamic medium washing away hole wall; C dynamic medium water is not directly flowed through and can be avoided erosion and the pollution of water to rock core at the bottom of the hole.

The beneficial effects of the utility model are: 1 low discharge impactor can reduce the erosion damage effect of scouring media to hole wall, helps the stable of loose soft formation hole wall, thereby has given full play to the advantage of down-the-hole hammer auger; The 2 impactor two-man acts control time difference can obtain the maximum impact energy; 3 have air defense beats mechanism, that is: when running into emergency lifting drilling tool, even have little time to close power water, impactor stops percussion action, thereby the protection drilling tool is not damaged, and avoids rock core (the native heart) owing to impact shock comes off; 4 automatic drainage functions, that is: when promoting drilling tool, spilled water hole is opened naturally on the center tap, and the water in the drilling rod makes things convenient for the drilling rod unloading along with outside the drilling rod lifting process nature discharge pipe, can avoid carrying simultaneously boring producing suction at the bottom of the hole, and it is stable to help hole wall.

(4) description of drawings:

Below in conjunction with accompanying drawing the utility model operating principle is further specified.

Fig. 1 is a structure principle chart of the present utility model.

1. top connections among the figure, 2. valve, 3. valve spring is regulated pad, and 4. mainspring is regulated pad, 5. goes up nipple, 6. mainspring, 7. valve seat, 8. valve spring, 9. piston, 10. sealing ring, 11. sealing ring, center tap on 12., 13. adjust packing rings, 14. times center taps, 15. hanging ring, 16. outer tubes, 17. block stamps, 18. non-return valves, 19. hammering block, 20. valve seats, 21. baskets, 22. lower contacts, 23.PVC pipe, 24. bit adapters, 25. protect heart pawl, 26. drill bits.

As shown in the figure: power water enters the right chamber of piston 9 through the annular gap of the skew back hole of top connection 1, last nipple 5 and valve seat 7, thereby promote piston 9 to left movement, compress mainspring 6 and valve spring 8 in the motion process simultaneously left, when piston 9 after left movement one section moves, because being compressed, valve spring 8 produces elastic force promotion valve 2 to left movement, thereby the gap between valve 2 and the valve seat 7 is opened, and the power aqueous medium is discharged impactor through the central passage of valve seat 7, the central passage of piston 9, the spilled water hole of block stamp 17, the weep hole of lower contact 22.In drainage procedure, the impactor cavity internal pressure reduces, and piston 9 moves right under the effect of mainspring 6 extension elastic force, and drive block stamp 17 moves right and hits hammering block 19.Because when piston 9 moved right, it was zero that valve spring 8 is also upheld up to elastic force, under the situation that valve spring power disappears, valve 2 is under gravity (under the setting situation) and impact of water effect, close the central passage of valve seat 7, return to shown position again, enter the percussion action of next circulation.

(5) specific embodiments:

I. impactor low discharge enforcement body makes top connection 1, be connected with outer tube 5 by screw thread, and top connection endoporus and valve 2 is for being slidingly matched; Valve 2 is connected for wedge surface with valve seat 7, on the top of valve seat 7 the insides mainspring 6 and valve spring 8 are set, two springs are installed with one heart side by side, piston 9 is in mainspring 6 and valve spring 8 bottoms, and with valve seat for being slidingly connected, piston 9 can slide up and down in valve seat inside, and is spacing being slidingly connected with center tap 12, and center tap is connected with outer tube 5 by screw thread.The difference of cylinder area up and down of piston is more little, and the more little then flow of valve spring rigidity is more little;

Ii. in the impactor course of work two-man act control time difference mechanism be by mainspring 6 and valve spring 8 be set up in parallel with one heart, mainspring 6 is positioned at valve seat 7 and piston 9 in the middle of, its connected mode is for being connected in series, valve spring 8 is between valve 2 and piston 9, and its connected mode is also for being connected in series.Cylinder area is poor up and down for the length of mainspring 6 and valve spring 8 and rigidity and piston, the significant surface product moment of valve is relevant, their modular design cooperatively interact the time difference, block stamp piston 9 is lifted when hammering into shape near peak, valve spring 6 just promotes the central passage that valve 2 is opened valve seat 7, and keep the passage open mode to impact hammering block moment closing, thereby guarantee the impact energy strike hammering block of block stamp with maximum to block stamp piston 9.

Iii. the impactor air defense is beaten mechanism and is made down center tap 14 and adjustment packing ring 13, by be slidingly connected at center tap 12 outsides slidably, slide displacement is till the hanging ring 15, when running into unexpected accident, the down-hole has little time to switch off the pump when just promoting drilling tool, following center tap 14 on the drilling tool is along last center tap 12 downward landings, adjustment packing ring 13, following center tap 14 move down, till hanging on hanging ring 15, discharge opening on the center tap 12 is opened, cavity pressure can not set up under the impactor, impactor quits work, and this mechanism is air defense and beats mechanism.

Iv. drilling tool unloads the limbers of water function by top connection 1 automatically, the annular gap of valve seat 7 and outer tube 5, the spilled water holes of last center tap 12 etc. constitute the passage that is communicated with, following center tap 14, adjust packing ring 13 and last center tap 12 by being slidingly connected, when promoting drilling tool when finishing footage per round trip to stop to send water, following center tap 14 on the drilling tool is along last center tap 12 downward landings, adjust packing ring 13, following center tap 14 moves down, thereby open the discharge opening on the center tap, the water of drilling rod inside enters the annular gap of valve seat 7 and outer tube 5 through the outlet pass of top connection 1, discharge through the spilled water hole of last center tap 12 again, make things convenient for the drilling tool unloading, automatic drainage mechanism is also done by this mechanism.Under the timely additional well of water that in putting forward the brill process, is released, play prevention drilling tool bottom and form the negative pressure swabbing action, thereby prevent that rock sample from coming off, also help the stable of hole wall simultaneously.

Claims

1. the low discharge hydraulic impacter of the usefulness of taking a sample, it is characterized in that: impactor housing internal valve is on the valve seat, valve spring is between valve and piston, mainspring is between valve seat and piston, the concentric aggregate erection in parallel of dual spring constitutes differential water distribution mechanism, mainspring is positioned at the water route of block stamp piston top formation valve formula reaction beater mechanism, each structure of lifting drilling tool housing gangs up, and following center tap and last center tap are for being slidingly connected.

2. according to the described impactor of claim 1, it is characterized in that: impactor top connection (1) be connected with outer tube (5) by screw thread, and the endoporus of top connection (1) and valve (2) is for being slidingly matched; Valve (2) is connected for wedge surface with valve seat (7), on the top of valve seat (7) inner chamber mainspring (6) and valve spring (8) are set, two springs are installed with one heart side by side, piston (9) is in mainspring (6) and valve spring (8) bottom, and with valve seat (7) for being slidingly connected, piston (9) can slide up and down in valve seat inside, and with center tap (12) be spacing being slidingly connected, and center tap is connected with outer tube (5) by screw thread.

3. according to the described low discharge impactor of claim 1, it is characterized in that: impactor mainspring (6) and valve spring (8) for be set up in parallel with one heart, mainspring (6) is positioned at valve seat (7) and piston (9) in the middle of, its connected mode is for being connected in series, valve spring (8) is positioned between valve (2) and the piston (9), also for being connected in series, mainspring (6) is different with rigidity with the length of valve spring (8) for its connected mode.

4. according to the described hydraulic impacter of claim 1, it is characterized in that: impactor air defense is beaten mechanism and is meant down center tap (14) and adjustment packing ring (13), with last center tap (12) for be slidingly connected, slide displacement is till the hanging ring (15).

5. according to the described impactor of claim 1, it is characterized in that; Drilling tool unload automatically water function by the annular gap of the limbers of top connection (1), valve seat (7) and outer tube (5), go up the passage that formation such as spilled water hole of center tap (12) are communicated with, following center tap (14), adjustment packing ring (13) and last center tap (12) are by being slidingly connected.