CN201095769Y

CN201095769Y - Rotary aperture sealer for high-pressure grouting

Info

Publication number: CN201095769Y
Application number: CNU2007200643374U
Authority: CN
Inventors: 蒋宗馗
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-01
Filing date: 2007-09-01
Publication date: 2008-08-06
Anticipated expiration: 2017-09-01

Abstract

The utility model relates to a rotary-type orifice enclosed device used for high-pressure grouting, and the device consists of a base, a cover head, a plurality of wear-resisting slurry-prevention gaskets and a return pipe. The rotary-type orifice enclosed device used for high-pressure grouting is characterized in that a through hole with a big-end-up aperture is arranged in the base; the upper part of the through hole is connected with the cover head through a screw; the wear-resisting slurry-prevention gaskets are arranged at the big aperture of the through hole; an axial through hole is arranged in the cover head; the axial through hole has the big-end-up aperture and can be assembled with a slurry-injection pipe or a drill rod; the centre portion of the cover head through hole is provided with a cambered surface inner wall for forming an oil-storage cavity when in operation; the centre portion of the base is provided with the return pipe; the lower part of the base is provided with an external thread. The utility model makes use of a modified wear-resisting polyurethane slurry-prevention ring under the action of the cover head to expand and tightly hold the drill rod, thereby enabling the slurry to pass to the hole bottom with one part leaking through a slit under the high pressure of a mud pump and the other part flowing back at high speed through the return pipe; and the utility model can prevent the drill rod from attaching to the wall, lower the slurry coagulating speed, and realize holding and covering the drill so as to ensure the continuity of the grouting process.

Description

The rotary aperture sealer that is used for high pressure grouting

[technical field] the utility model relates to the high pressure curtain grouting device that a kind of foundation of hydraulic structure based process is oozed the control engineering, is a kind of rotary aperture sealer that is used for high pressure grouting specifically.

[background technology] is present, and the high pressure pouring cement grout technology that " slim hole drilling, segmentation from top to bottom, needless to say coagulate, aperture sealing, hole internal-circulation type " all adopted in the curtain grouting of control project seepage controlling is oozed in the power station.Aperture closure grouting technology is present domestic job practices commonly used.Since existing aperture sealer in the high pressure grouting process in order to guarantee not occur pipe laying accident in the hole, need to be interrupted grouting every 5-20 minute, this be difficult to satisfy the regulation of " hydraulic structure cementation construction technique normalizing " 6.8.4 bar " grouting must be carried out continuously ... ".Grouting is interrupted, and has caused well filling in medium and small miniature crack of slurries.Reduce the concrete castability in middle-size and small-size crack, influenced grouting quality.And because of aperture sealer design defect very easily causes an armful brill, underground drilling accident, the foundation of hydraulic structure plinth is handled the site operation personnel of oozing the control engineering, and this influences the difficult problem of grouting quality urgent hope solution.

This be because the structure of existing sealer by ectosome, every slurry steel pad, only starch ball and gland is formed.It has following defective: the design and installation of (1) ears semicircle gland is wasted time and energy, and a grout compartment circulation line generally is installed is generally wanted 5～10 minutes.(2) sealer being installed is to need to be equipped with special tool 20mm～22mm double offset ring spanner or opening monkey wrench, and very inconvenient during installation, instrument is easy to lose.(3) the sealer fastening bolt is easy to stripped thread owing to dismantle screw thread for a long time, and screw rod is designed to filament and is also entered in the bolt silk groove by cement grout easily, causes tightening and loosening inconvenience.(4) adopting rubber is that glueballs is only starched in the sealing of raw material, is easy to wearing and tearing, needs often to change, and end wearing and tearing are easy to from sealer top spillage grouting quality be impacted, and cause waste of material.(5) each parts of dismounting back are scattered easily, lose.1., industry standard 6.8.4 bar clearly stipulates " grouting must be carried out continuously, if interrupt for some reason, should handle by corresponding principle " because the above-mentioned defective of existing sealer also produces following influences to whole grouting process:.Former sealer is difficult to satisfy this requirement, because in filling process, need frequent termination of pumping activity Grout-jetting pipe (drilling rod), along with progressively filling extension in the crack of slurries, pressure rises gradually until design pressure, inhaling the slurry rate descends gradually until stopping to inhale slurry, slurries are in slush pump set solid amount, under the situation of high pressure, big flow, the cement granules high-speed friction of injection in slurries, slurry temperature raises very fast, the frequency of so movable Grout-jetting pipe will be accelerated, and general 5～10 minutes will termination of pumping activity Grout-jetting pipe.In the hole section that underflow irritate to finish, particularly this is outstanding for this kind situation, and general pressure rises to 4Mpa when above by mutual corresponding relation, will movable drilling rod about 5 minutes.If this irritates in the sector hole dirty sand is arranged, fault belt etc., suction slurry rate is big, repeatedly because of startup suddenly after the termination of pumping, the unexpected flow at high speed of underflow, the silt particle particle may be taken back the obstruction high pressure sluice valve, and generation bury drills, booster, vacuum tank are suppressed quick-fried, cause device damage.Under these circumstances, be badly in need of a high performance aperture sealer and satisfy the demand of grouting continuously.

2., change along with pore-creating is constantly deepened, slurries circulate in the hole with the high pressure high flow condition, slurry temperature sharply raises, slurries can be in very short time initial set.Executing slurries circulation time in the hole in the filling process might not be full of on whole aperture circumferential and flow, a very possible side is the round passage of slurries, the Grout-jetting pipe that most cases is (drilling rod of 40mm or 50mm) pastes a side opening wall, static slurries will be embraced Grout-jetting pipe in (drilling rod is adherent more outstanding under action of gravity when the construction inclined hole) hole wall and the Grout-jetting pipe outer wall contact area, cause embracing the brill accident.Or at karst area, in the work progress in pilot hole, a preface hole, pour into underflow for a long time, and human factor or mechanical equipment fault also can cause and embrace a brill accident, influences grouting quality.

3., cause the time resource waste.About 1.5～4 hours consuming time of one section of general every filling, because termination of pumping causes grouting to be interrupted, losing time is generally 30～60 minutes.

[summary of the invention] is for overcoming the above-mentioned deficiency of existing sealer, the utility model provides a kind of rotary aperture sealer that is used for high pressure grouting, in order to convenient construction, reduce construction cost, satisfy the industry standard requirement, under high pressure rotate Grout-jetting pipe (pressure can rise to about 5MPa), guarantee the continuity of technology, improve grouting quality, avoid construction accident.

For solving its technical problem, the technical scheme that the utility model adopted is: rotary aperture sealer is by headkerchief, pedestal, sealing steel pad, go up wear-resisting modified polyurethane grout cover, modified abrasion resistant nylon is only starched interlayer, following wear-resisting modified polyurethane grout cover, form every slurry steel pad and return pipe, its feature is: be provided with axially extending bore in the 1. columniform steel pedestal, the aperture on this through hole top is greater than the aperture of lower through-hole, in the through hole of large aperture, top, be provided with successively from bottom to top every slurry steel pad, following wear-resisting modified polyurethane grout cover, modified abrasion resistant nylon is only starched interlayer, go up wear-resisting modified polyurethane grout cover and sealing steel pad 1 and be provided with internal thread in the upper end of pedestal through hole, and be connected with headkerchief by this internal thread, the center of headkerchief is provided with axially extending bore, the aperture, top of this through hole is greater than joining Grout-jetting pipe or claim the diameter of drilling rod, the aperture, bottom of this through hole be slightly larger than join Grout-jetting pipe or claim the diameter of drilling rod, the middle part of this through hole is provided with the arc surface inwall, and the distance between the arc surface inwall is greater than joining Grout-jetting pipe or claim the diameter of drilling rod.2. in the middle and lower part of base outer wall by being welded with return pipe, the outer end of this return pipe is provided with external screw thread, is provided with axially extending bore in the return pipe, this through hole is connected with axially extending bore in the pedestal.3. be provided with external screw thread in the bottom of base outer wall.

Operating principle of the present utility model is: rotary aperture sealer is to utilize modified abrasion resistant polyurethane grout cover, modified abrasion resistant nylon only to starch interlayer to expand under the effect of steel headkerchief and hold grout pipe tightly, enter the crack at slush pump high pressure effect next part slurry infiltration in the time of at the bottom of slurries are delivered to the hole by inlet pipe, another part slurries are full of whole hole wall and drilling rod or claim cavity between the Grout-jetting pipe after return pipe refluxes at a high speed.Drilling rod or title Grout-jetting pipe rotate in the hole and stir slurries, and grouting pressure can rise to 5Mpa as requested during rotation.Make additional fresh slurries rapidly and high temperature slurries and evenly change the slurries fluidised form simultaneously, prevent that drilling rod is adherent, alleviate the slurries rate of set, reach the purpose that prevents to embrace a brill, bury drills, especially ensured the continuity of filling process.

The utility model has been compared following beneficial effect with existing sealer:

(1), design is tightly short, quick and easy for installation, therefore can bring 1., save grouting time, one section of every perfusion was generally saved 30～60 minutes, a machine-team can be saved 2～4 hours, had strengthened effect, had reduced cost.2., the high 25cm of whole sealer, every slurry steel pad, grout cover, nylon are only starched interlayer, gone up grout cover down, sealing steel pad and headkerchief be linked to be integral body, finish lubricated before installing after, all need not be in the later use with each parts dismounting of sealer.Can install, and reduce working strength of workers in general 1～3 minute.Any one can be used as erecting tools to pipe wrench when sealer was installed, and ten sides make things convenient for.3., irritated one section after dismounting headkerchief all need not be withdrawed from promptly detachable sealer during sealer.4., when rotation long period can pour the oiling chamber that the cambered surface gap between Grout-jetting pipe and the sealer headkerchief forms into an amount of cold oil, perhaps add a small gangs of water and aim at the slurry that ends of sealer and partly cool off.Prevent that temperature from raising, and reduces wear-resisting performance of only starching parts.5., only it is very desirable to starch effect, the sealing headkerchief need not be pressed down too tightly when new grout cover uses, and just can meet the demands.Along with can according to circumstances suitably pressing, long use headkerchief reaches the desirable effect of only starching.

(2), rotary sealer can effectively satisfy the grouting process requirement.It can not only satisfy the regulation of industry standard 6.8.4 bar fully, satisfies the continuity of grouting, has ensured grouting quality.And in filling process, can according to circumstances start rig rotation Grout-jetting pipe (drilling rod) at any time, any running that all need not stop stock pump when once rotating Grout-jetting pipe prevents that Grout-jetting pipe is adherent, is buried Grout-jetting pipe by the initial set slurries.

(3), owing to the perfusion underflow, along with the reason Grout-jetting pipe of the lengthening of hole depth, hole deviation with running into folder mud layer fault belt etc. in adherent bending of hole deviation or the geology reason hole, very easily accident in the grout occurs executing, rotary aperture sealer is because play Grout-jetting pipe and reduce the probability of holding tube greatly arbitrarily.

[description of drawings] further specifies the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is a structural representation sectional drawing of the present utility model.

Fig. 2 is a vertical view of the present utility model.

Among the figure: 1. headkerchief, 2. pedestal, 3. sealing steel pad, 4. go up wear-resisting modified polyurethane grout cover, 5. modified abrasion resistant nylon only starch interlayer, 6. time wear-resisting modified polyurethane grout cover, 7. every slurry steel pad, 8. return pipe, 9. external screw thread, 10. internal thread, 11. cambered surface inwalls.

[specific embodiment] is with reference to accompanying drawing: the upper end at column type steel pedestal 2 is fixed with headkerchief 1 by internal thread 10, headkerchief 1 is a T font screw rod, the top of this screw rod is a regular hexagon, the screw rod outer wall is provided with external screw thread, be connected in order to internal thread with pedestal 2 upper ends, be provided with axially extending bore in the screw rod, the upper diameter of this through hole is greater than joining drilling rod or claim the diameter of Grout-jetting pipe, the lower diameter of through hole be slightly larger than join the diameter of drilling rod, the middle part of through hole is provided with cambered surface inwall 11, cambered surface and institute are joined form a shoe cream room between the drilling rod external diameter, in order to reduce the friction between drilling-rod external wall and the headkerchief through-hole wall after the oiling, in column type steel pedestal 2, be provided with axially extending bore, the aperture on the top of this through hole is greater than the aperture of lower through-hole, the through hole top of pedestal 2 is provided with internal thread 10, the lower outer diameter of pedestal 2 is provided with external screw thread 9, in the large aperture through hole on pedestal 2 tops, be provided with the sealing steel pad 3 of circular ring type from top to bottom successively, last abrasion resistant polyurethane grout cover 4, modified abrasion resistant nylon is only starched interlayer 5, following abrasion resistant polyurethane grout cover 6 and every slurry steel pad 7, in order to intercept cement slurry along emitting on the drilling rod.By being welded with return pipe 8, the outer wall of this return pipe is provided with external screw thread on the outer wall of the bottom of pedestal 2, in order to external pressure piping, is provided with axially extending bore in the return pipe, and the axially extending bore in this through hole and the pedestal 2 is connected, in order to the backflow cement grout.

Claims

1, a kind of rotary aperture sealer that is used for high pressure grouting, by pedestal, headkerchief, sealing steel pad, go up wear-resisting modified polyurethane grout cover, modified abrasion resistant nylon is only starched interlayer, following wear-resisting modified polyurethane grout cover, form every slurry steel pad and return pipe, it is characterized in that: be provided with axially extending bore in the columniform steel pedestal, the aperture on this through hole top is greater than the aperture of lower through-hole, in the through hole of large aperture, top, be provided with successively from bottom to top every slurry steel pad, following wear-resisting modified polyurethane grout cover, modified abrasion resistant nylon is only starched interlayer, goes up wear-resisting modified polyurethane grout cover and sealing steel pad; Upper end at the pedestal through hole is provided with internal thread, and be connected with headkerchief by this internal thread, the center of headkerchief is provided with axially extending bore, the aperture, top of this through hole is greater than joining Grout-jetting pipe or claim the diameter of drilling rod, the aperture, bottom of this through hole be slightly larger than join Grout-jetting pipe or claim the diameter of drilling rod, the middle part of this through hole is provided with the arc surface inwall, and the distance between the arc surface inwall is greater than joining Grout-jetting pipe or claim the diameter of drilling rod.

2, the rotary aperture sealer that is used for high pressure grouting according to claim 1, it is characterized in that: in the bottom of base outer wall by being welded with return pipe, the outer end of this return pipe is provided with external screw thread, is provided with axially extending bore in the return pipe, and the axially extending bore in this through hole and the pedestal is connected.

3, according to claim 1 with the rotary aperture of high pressure grouting sealer, it is characterized in that: the bottom in base outer wall is provided with external screw thread.