CN107265332A - A kind of secondary drawing jack and the application method of rising in double loop - Google Patents
A kind of secondary drawing jack and the application method of rising in double loop Download PDFInfo
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- CN107265332A CN107265332A CN201710574962.1A CN201710574962A CN107265332A CN 107265332 A CN107265332 A CN 107265332A CN 201710574962 A CN201710574962 A CN 201710574962A CN 107265332 A CN107265332 A CN 107265332A
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- pressing device
- jack
- anchor tube
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- 230000000630 rising effect Effects 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 96
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 238000010276 construction Methods 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 9
- 206010057071 Rectal tenesmus Diseases 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 208000012271 tenesmus Diseases 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003660 reticulum Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/26—Adaptations or arrangements of pistons
Abstract
Secondary drawing jack and the application method of rising in a kind of double loop, it is adaptable to which underground coal mine is used.It includes upper piston jack and lower piston jack, provided with fastening expansion pulling device between upper piston jack and lower piston jack；Risen with hydraulic oil into top pressing device and draw in sap cavity, realization, which is once risen, draws and hydraulic pressure locking, sap cavity injection hydraulic pressure is drawn in by rising to top anchor tube realize secondary rise drawing and hydraulic pressure locking again, rise after drawknot beam, then discharge hydraulic oil and enter top anchor pole pipe and move back anchor back to the fluid chamber, realize that top anchor tube moves back anchor, hydraulic oil is controlled to move back anchor back to the fluid chamber into top pressing device again, realize that top pressing device moves back anchor, journey is pulled through so as to complete entirely to rise, it, which rises to draw in liquid hydraulic circuit and move back anchor time liquid hydraulic circuit, sets up jack both sides separately.Its is simple in construction, good with anchor cable lock matching, improves effective prestress of the lockset lock ring to pallet, the firmness of lockset lock core locking is strengthened, further to improve roof timbering quality, it is ensured that the roof safety of line construction.
Description
Technical field
The present invention relates to a kind of double loop secondary rise drawing jack and application method, it is particularly suitable for use in what underground coal mine was used
Secondary drawing jack and the application method of rising in double loop.
Background technology
Now during the line tunnelling production and construction of colliery one, serious ignores lockset typical problem and lockset with rising
Draw pump jack matching problem.Takeing for rising, to draw pump reading be the prestressing force size for being supplied to top plate, actual loss 50%-
70%, part 17.8 × 6200mm of Ф anchor cables require prestressing force 130KN, and actually applied pressure only has 40-65KN, and regular screw threads
Steel anchor rod torque value be 300N.m, practice of construction prestressing force be 60-70KN, therefore part anchor cable to top board construction pressure actually
The prestressing force all provided not as 1 anchor pole is big, there is serious roof safety hidden danger, is but ignored always by people.
Under anchor cable tensioner state, the height value that lockset lock core exposes outside lock ring is a, and jack top anchor tube and top pressing device are high
The poor value of degree is b.
As a=b, effect is ideal, but in a line produce reality, such situation probability of happening is almost 0%.
Work as a>During b, it is meant that when lock ring is also not up to specified intensity, lock core is locked in advance, jack and lockset
Real effective contact surface should be lock core and top anchor tube, and prestressing force is to be delivered in lockset and following anchor cable exposed parts,
Can not effectively it be delivered on the body of rod of anchor cable steel strand wires, such most commonly seen probability of happening of situation accounts for about 95%.
Work as a<During b, it is meant that the lock core of lockset and lock ring size are simultaneously mismatched, when lock ring, lock core are by larger pressure, lock
Core is not locked completely, is moved back after anchor, lock ring and lock core there occurs it is asynchronous move down, and lock core is influenceed by the frictional resistance of anchor cable,
Stroke ratio lock ring is moved down apart from small, such situation loss of prestress maximum.
It is that single loop once rises drawing jack in the market, it pushes up anchor tube and top pressing device is integral mechanical connection,
Rise drawing when, middle cylinder piston promotes top anchor spring, top anchor spring to promote top anchor tube and top pressing device to sync up movement after being pressurized, can only
The drawing jack that once rises is realized, during drawing of rising, because of lockset quality, lockset and the jack described in above-mentioned background technology
Matching problem, and cause loss of prestress excessive.Effective prestress is far smaller than design prestressing force.
The content of the invention
Technical problem：The purpose of the present invention be overcome weak point of the prior art there is provided one kind it is simple in construction, use
Convenient, achievable top anchor tube, the gradation of top pressing device are risen and draw and can effectively reduce because lockset quality, lockset are matched with jack and asked
Secondary drawing jack and the application method of rising in the double loop of loss of prestress serious problems caused by topic.
Technical scheme：To achieve the above object, the secondary drawing jack that rises in double loop of the invention, the secondary drawing thousand of rising in double loop
Jin top, including upper piston jack and lower piston jack, rise between upper piston jack and lower piston jack provided with fastening
Drawing device；
The upper piston jack includes column top pressing device, is axially arranged with top anchor tube in top pressing device, top pressing device inner loop around
It is that piston shaft will be pushed up provided with anchor tube piston, top pressing device bottom is pushed up provided with anchor ring is unloaded to push up anchor tube and be provided with cavity, cavity to push up anchor tube
Be respectively equipped with above and below the cavities seals of depressor and fixed top anchor tube, the side wall of top pressing device with internal cavities together with pipeline, wherein
Top anchor tube piston, which rises by the top anchor tube that cavity is divided into lower section, to be drawn in the top anchor tube of sap cavity and top and moves back anchor back to the fluid chamber；
The lower piston jack includes axially being provided with piston cylinder inner casing, piston in piston cylinder outer shell, piston cylinder outer shell
Inner casing piston is provided with the middle part of cylinder inner casing, piston cylinder inner casing top is provided with middle cylinder piston, and the cavity of piston cylinder outer shell is by inner casing piston
The top pressing device that the top pressing device being divided into up moves back anchor oil back chamber and lower section rises and draws in sap cavity, and piston cylinder outer shell side wall is set respectively up and down
There are two pipelines, move back anchor oil back chamber with top pressing device respectively and top pressing device rises and draws in sap cavity and connect, wherein middle cylinder piston base is set
In top pressing device moves back anchor oil back chamber, middle cylinder top land stretches out middle cylinder piston and is fixedly connected with top pressing device bottom；
The top anchor tube is moved back between anchor back to the fluid chamber moves back anchor oil back chamber with top pressing device to be connected by binodal telescopic sleeve pipe, is pushed up
Anchor tube rises to draw in sap cavity and rise to draw between sap cavity with top pressing device to be connected by binodal telescopic sleeve pipe；
The space left between anchor ring for fixing anchor cable lock is unloaded in the middle cylinder top land and top pressing device bottom.
0 shape sealing ring, middle cylinder piston are provided between top anchor tube piston and top pressing device and top anchor tube in described top pressing device
0 shape sealing ring is provided between piston cylinder outer shell, middle cylinder piston is respectively equipped with the sealing of 0 shape with piston cylinder outer shell and piston cylinder inner casing
Circle.
Outside the nut and piston cylinder that the piston cylinder inner casing passes through afterbody through the concentric round tube hole of piston cylinder outer shell bottom
Cylinder is connected, and nut is provided with stopping screw, and piston cylinder inner casing sealed bottom is fixed provided with bonnet in piston cylinder outer shell bottom.
The top anchor tube moves back anchor back to the fluid chamber and top pressing device is moved back between anchor oil back chamber, and top anchor tube, which rises, to be drawn in sap cavity and rise with top pressing device
Draw between sap cavity and be equipped with two position four-way valves, two position four-way valves are provided with snap joint.
The method of work of jack is drawn using secondary rise in above-mentioned double loop, is comprised the following steps：
A. the secondary drawing jack that rises in double loop, first retreats to lowest order, by anchor cable tail end by the middle cylinder piston for the drawing jack that rises
Steel strand wires insertion top pressing device top anchor tube in, lift the drawing pump jack that rises, it is to avoid drawing pump jack tenesmus of rising；
B. a top pressing device is carried out to rise drawing：Hydraulic oil injection top pressing device is risen and draws in sap cavity promotion inner casing piston upwards
And drive middle cylinder piston to stretch out upward, anchor tube is pushed up during middle cylinder piston stretches out and departs from the instrument for being fixed on inner casing piston
Anchor and make moveable anchor elastic force promotion under lock anchor cable steel strand wires so that steel strand wires are constantly stretched in cylinder ejector, make
Jack pump crown depressor holds out against anchor cable lock lock ring, after specified intensity is reached, hydraulic locking top pressing device, which rises, draws in sap cavity, complete
Into drawing of once rising；
C. secondary top pressing device is carried out to rise drawing：By hydraulic oil injection top anchor tube rise draw in sap cavity promote top anchor tube piston make top anchor
Pipe is stretched out, and holds out against anchor cable lock core, and after pushing up anchor tube and reaching specified pressure to top plate, stopping is risen drawing, and hydraulic locking top anchor tube rises drawing
Admission chamber, completes secondary drawing of rising, and draws the effective prestress for improving lockset lock ring to pallet by secondary rise, and strengthen lockset lock
The firmness of core locking, further improves roof timbering quality, it is ensured that the roof safety of line construction；
D. terminate control top anchor tube after secondary drawing of rising and move back anchor, control connection top anchor tube, which rises, draws in two position four-way valve solutions of sap cavity
The hydraulic locking of sap cavity is drawn in except top anchor tube rises, then controls connection top anchor tube to move back anchor back to the fluid chamber opening, by hydraulic oil injection top anchor
Pipe moves back anchor back to the fluid chamber, and top anchor tube piston is moved down, and completes top anchor tube and moves back anchor；
E. top pressing device moves back anchor：Push up after anchor tube withdraws, then control connection top anchor tube to move back two position four-way valves of anchor back to the fluid chamber by liquid
Force feed injection top pressing device moves back anchor oil back chamber, moves down middle cylinder piston, retracts extreme lower position in piston cylinder inner casing, so as to realize
Top pressing device moves back the whole process of anchor.
Beneficial effect：
(1) the secondary drawing jack that rises in the double loop of the application can realize that top anchor tube, the gradation of top pressing device is risen drawing, is effectively reduced
Because the problem of loss of prestress is serious caused by lockset quality, lockset and jack matching problem.
(2) risen using hydraulic oil into top pressing device and draw in sap cavity, realization once rise drawing and hydraulic pressure locking, then by top anchor
Pipe, which rises, to be drawn in sap cavity injection hydraulic pressure and realizes secondary rise drawing and hydraulic pressure locking, after the drawknot beam that rises, then is discharged hydraulic oil and entered top anchor pole
Pipe moves back anchor back to the fluid chamber, realizes that top anchor tube moves back anchor, then controls hydraulic oil to move back anchor back to the fluid chamber into top pressing device, realizes that top pressing device moves back anchor,
Journey is pulled through so as to complete entirely to rise, it, which rises to draw in liquid hydraulic circuit and move back anchor time liquid hydraulic circuit, sets up jack both sides separately, convenient
Praise；
(3) top pressing device move back anchor back to the fluid chamber, top pressing device rise draw in sap cavity, top anchor tube rise draw in sap cavity, top anchor pole pipe move back anchor return
Sap cavity is longitudinally arranged, simple in construction, realizes double loop hydraulic system integration；
The secondary drawing jack that rises in the double loop of the application, the mechanical connection pushed up between anchor tube and top pressing device is released,
Separated completely, realize the drawing of once rising of top pressing device and lockset lock ring, the secondary drawing of rising of top anchor tube and lock core.Solve anchor cable
The design defect of lockset lock ring and lock core, the problems such as lockset is mismatched with jack improves lockset lock ring pair by secondary drawing of rising
The effective prestress of pallet, and the firmness of lockset lock core locking is strengthened, further to improve roof timbering quality, it is ensured that
The roof safety of one line construction.
Brief description of the drawings
Secondary rise in double loop that Fig. 1 is the present invention draws the structure chart of jack.
Fig. 2 is the secondary anchor cable structure figure for drawing jack and matching that rises in double loop of the present invention.
Fig. 3 is that secondary rise in double loop of the present invention draws the anchor cable lock mechanism map of jack matching.
In figure：1- pushes up anchor tube, 2- top pressing devices, and 3- unloads anchor ring, and 4- anchors cup, 5- moveable anchors, 6- back-moving springs, 7- binodals can be stretched
Heat-Shrinkable Tubings；The position four-way valves of 8- two, 9- middle cylinder pistons, 10- top pressing devices are moved back in anchor oil back chamber, 11- piston cylinder outer shells, 12- piston cylinders
Cylinder, 13- top pressing devices, which rise, draws in sap cavity, 14- snap joints, 15- seal plugs, 16- stopping screws, 17- nuts, 18- bonnets, 19-0
Shape sealing ring, 20- tops anchor tube, which rises, draws in sap cavity, and 21- tops anchor tube moves back anchor back to the fluid chamber.
Embodiment
One embodiment of the present of invention is further described below in conjunction with the accompanying drawings：
As shown in Figure 1, Figure 2 and Figure 3, the secondary drawing jack that rises in double loop of the invention, it include upper piston jack and
Lower piston jack, provided with fastening expansion pulling device between upper piston jack and lower piston jack；
The upper piston jack includes in column top pressing device 2, top pressing device 2 being axially arranged with inside top anchor tube 1, top pressing device 2
Around anchor tube 1 is pushed up provided with cavity, cavity is interior to be provided with provided with anchor tube piston, the bottom of top pressing device 2 is pushed up for piston shaft to push up anchor tube 1 and unloads anchor
Ring 3 by the cavities seals of top pressing device 2 and fixed top anchor tube 1, be respectively equipped with above and below the side wall of top pressing device 2 with internal cavities together with
Pipeline, wherein the top anchor tube that cavity is divided into lower section is risen and draws in the top anchor tube of sap cavity 20 and top and move back anchor back to the fluid chamber by top anchor tube piston
21；
Described lower piston jack includes axially being provided with piston cylinder inner casing in piston cylinder outer shell 11, piston cylinder outer shell 11
12, the middle part of piston cylinder inner casing 12 is provided with inner casing piston, and the top of piston cylinder inner casing 12 is provided with middle cylinder piston 9, piston cylinder outer shell 11
Cavity is risen by the top pressing device that the top pressing device that inner casing piston is divided into up moves back anchor oil back chamber 10 and lower section draws in sap cavity 13, piston cylinder
Two pipelines are respectively equipped with above and below the side wall of outer shell 11, anchor oil back chamber 10 is moved back with top pressing device respectively and top pressing device rises and draws in sap cavity 13 and connect
Logical, wherein the bottom of middle cylinder piston 9 is arranged on top pressing device and moved back in anchor oil back chamber 10, and middle cylinder piston 9 and top are stretched out in the top of middle cylinder piston 9
The bottom of depressor 2 is fixedly connected；It is close provided with 0 shape between top anchor tube piston and top pressing device 2 and top anchor tube 1 in described top pressing device 2
Seal, is provided with 0 shape sealing ring, middle cylinder piston 9 and piston cylinder outer shell 11 and piston cylinder between middle cylinder piston 9 and piston cylinder outer shell 11
Inner casing 12 is respectively equipped with 0 shape sealing ring.The piston cylinder inner casing 12 passes through through the concentric round tube hole of the bottom of piston cylinder outer shell 11
The nut 17 of afterbody is connected with piston cylinder outer shell 11, and nut 17 is provided with stopping screw 16, after the bottom of piston cylinder outer shell 11 is provided with
Lid 18 fixes the sealed bottom of piston cylinder inner casing 12.
The top anchor tube is moved back between anchor back to the fluid chamber 21 moves back anchor oil back chamber 10 with top pressing device to be connected by binodal telescopic sleeve pipe 7
Logical, top anchor tube rises to draw in sap cavity 20 and rise to draw between sap cavity 13 with top pressing device to be connected by binodal telescopic sleeve pipe 7；
The sky left between anchor ring 3 for fixing anchor cable lock is unloaded in the top of the middle cylinder piston 9 and the bottom of top pressing device 2
Between.
The top anchor tube moves back anchor back to the fluid chamber 21 and top pressing device is moved back between anchor oil back chamber 10, and top anchor tube, which rises, draws in sap cavity 20 and top
Depressor, which rises to draw between sap cavity 13, is equipped with two position four-way valves 8, and two position four-way valves 8 are provided with snap joint 14.
Secondary rise draws the method for work of jack for the double loop of the present invention, comprises the following steps that：
A. the secondary drawing jack that rises in double loop, first retreats to lowest order, by anchor cable tail end by the middle cylinder piston 9 for the drawing jack that rises
Steel strand wires insertion top pressing device 2 top anchor tube 1 in, lift the drawing pump jack that rises, it is to avoid drawing pump jack tenesmus of rising；
B. a top pressing device is carried out to rise drawing：Hydraulic oil injection top pressing device is risen and draws in sap cavity 13 and promotes inner casing piston 12 upward
Move and drive middle cylinder piston 9 to stretch out upward, the disengaging of anchor tube 1 is pushed up during middle cylinder piston 9 stretches out and is fixed on inner casing work
The moveable anchor 5 of plug 12 and moveable anchor 5 is locked the steel strand wires of anchor cable under elastic force promotion so that steel strand wires are not in cylinder ejector
It is disconnected to be stretched, jack pump crown depressor 2 is held out against anchor cable lock lock ring, after specified intensity is reached, hydraulic locking top pressing device
Rise and draw in sap cavity 13, complete drawing of once rising；
C. secondary top pressing device is carried out to rise drawing：By hydraulic oil injection top anchor tube rise draw in sap cavity 20 promote top anchor tube piston make top
Anchor tube 1 stretches out, and holds out against anchor cable lock core, after top anchor tube 1 reaches specified pressure to top plate, stops rise drawing, hydraulic locking top anchor tube
Rise and draw in sap cavity 20, complete secondary drawing of rising, the effective prestress for improving lockset lock ring to pallet is drawn by secondary rise, and strengthen
The firmness of lockset lock core locking, further improves roof timbering quality, it is ensured that the roof safety of line construction；
D. terminate control top anchor tube 1 after secondary drawing of rising and move back anchor, control connection top anchor tube, which rises, draws in two four-ways of sap cavity 20
Valve 8 releases top anchor tube and rises and draws in the hydraulic locking of sap cavity 20, then controls connection top anchor tube to move back anchor back to the fluid chamber 21 to open, by hydraulic oil
Injection top anchor tube moves back anchor back to the fluid chamber 21, and top anchor tube piston is moved down, and completes top anchor tube and moves back anchor；
E. top pressing device 2 moves back anchor：Push up after the withdrawal of anchor tube 1, then two position four-way valves 8 for controlling connection top anchor tube to move back anchor back to the fluid chamber 21
Hydraulic oil injection top pressing device is moved back into anchor oil back chamber 10, middle cylinder piston 9 is moved down, retracts lowest order in piston cylinder inner casing 12
Put, so as to realize that top pressing device 2 moves back the whole step of anchor.
Claims (5)
1. a kind of secondary drawing jack that rises in double loop, it is characterised in that：It includes upper piston jack and lower piston jack, on
Provided with fastening expansion pulling device between piston jack and lower piston jack；
Described upper piston jack includes the top pressing device of column（2）, top pressing device（2）Inside it is axially arranged with top anchor tube（1）, top pressing device
（2）Inner loop is around top anchor tube（1）Provided with cavity, to push up anchor tube in cavity（1）It is that piston shaft is provided with top anchor tube piston, top pressing device
（2）Bottom is provided with and unloads anchor ring（3）By top pressing device（2）Cavities seals and fixed top anchor tube（1）, top pressing device（2）Side wall above and below
Be respectively equipped with internal cavities together with pipeline, wherein the top anchor tube that cavity is divided into lower section is risen and draws in sap cavity by top anchor tube piston
（20）Anchor back to the fluid chamber is moved back with the top anchor tube of top（21）；
Described lower piston jack includes piston cylinder outer shell（11）, piston cylinder outer shell（11）Middle axial direction is provided with piston cylinder inner casing
（12）, piston cylinder inner casing（12）Middle part is provided with inner casing piston, piston cylinder inner casing（12）Top is provided with middle cylinder piston（9）, piston cylinder
Outer shell（11）Cavity anchor oil back chamber is moved back by the top pressing device that inner casing piston is divided into up（10）Rise with the top pressing device of lower section and draw in
Sap cavity（13）, piston cylinder outer shell（11）Two pipelines are respectively equipped with above and below the wall of side, anchor oil back chamber is moved back with top pressing device respectively（10）With
Top pressing device, which rises, draws in sap cavity（13）Connection, wherein middle cylinder piston（9）Bottom is arranged on top pressing device and moves back anchor oil back chamber（10）In, middle cylinder
Piston（9）Middle cylinder piston is stretched out at top（9）With top pressing device（2）Bottom is fixedly connected；
The top anchor tube moves back anchor back to the fluid chamber（21）Anchor oil back chamber is moved back with top pressing device（10）Between pass through binodal telescopic sleeve pipe（7）Phase
Connection, top anchor tube, which rises, draws in sap cavity（20）Rise with top pressing device and draw in sap cavity（13）Between pass through binodal telescopic sleeve pipe（7）It is connected
It is logical；
The middle cylinder piston（9）Top and top pressing device（2）Anchor ring is unloaded in bottom（3）Between leave sky for fixing anchor cable lock
Between.
2. the secondary drawing jack that rises in double loop according to claim 1, it is characterised in that：Described top pressing device（2）Interior
Push up anchor tube piston and top pressing device（2）With top anchor tube（1）Between be provided with 0 shape sealing ring, middle cylinder piston（9）With piston cylinder outer shell（11）
Between be provided with 0 shape sealing ring, middle cylinder piston（9）With piston cylinder outer shell（11）With piston cylinder inner casing（12）It is respectively equipped with the sealing of 0 shape
Circle.
3. the secondary drawing jack that rises in double loop according to claim 1, it is characterised in that：The piston cylinder inner casing（12）Wear
Cross piston cylinder outer shell（11）The nut that the concentric round tube hole of bottom passes through afterbody（17）With piston cylinder outer shell（11）Connection, nut
（17）It is provided with stopping screw（16）, piston cylinder outer shell（11）Bottom is provided with bonnet（18）By piston cylinder inner casing（12）Sealed bottom
It is fixed.
4. the secondary drawing jack that rises in double loop according to claim 1, it is characterised in that：The top anchor tube moves back anchor back to the fluid chamber
（21）Anchor oil back chamber is moved back with top pressing device（10）Between, top anchor tube, which rises, draws in sap cavity（20）Rise with top pressing device and draw in sap cavity（13）Between
It is equipped with two position four-way valves（8）, two position four-way valves（8）It is provided with snap joint（14）.
5. secondary rise in double loop draws the method for work of jack described in a kind of usage right requirement 1, it is characterised in that including as follows
Step：
A. the secondary drawing jack that rises in double loop, first by the middle cylinder piston for drawing jack that rises（9）Lowest order is retreated to, by anchor cable tail end
Steel strand wires insertion top pressing device（2）Top anchor tube（1）It is interior, lift the drawing pump jack that rises, it is to avoid drawing pump jack tenesmus of rising；
B. a top pressing device is carried out to rise drawing：Hydraulic oil injection top pressing device is risen and draws in sap cavity（13）Promote inner casing piston（12）To
It is upper to move and drive middle cylinder piston（9）Stretch out upward, in middle cylinder piston（9）Anchor tube is pushed up during stretching（1）Depart from and fix
In inner casing piston（12）Moveable anchor（5）And make moveable anchor（5）The steel strand wires of anchor cable are locked under elastic force promotion, so that in oil cylinder
Steel strand wires are constantly stretched during ejection, make jack pump crown depressor（2）Anchor cable lock lock ring is held out against, when reaching specified intensity
Afterwards, hydraulic locking top pressing device, which rises, draws in sap cavity（13）, complete drawing of once rising；
C. secondary top pressing device is carried out to rise drawing：Hydraulic oil injection top anchor tube is risen and draws in sap cavity（20）Top anchor tube piston is promoted to make top
Anchor tube（1）Stretch out, hold out against anchor cable lock core, when top anchor tube（1）Top plate is reached after specified pressure, stops rise drawing, hydraulic locking top
Anchor tube, which rises, draws in sap cavity（20）, secondary drawing of rising is completed, the effective prestress for improving lockset lock ring to pallet is drawn by secondary rise, and
The firmness of lockset lock core locking is strengthened, roof timbering quality is further improved, it is ensured that the roof safety of line construction；
D. control top anchor tube after secondary drawing of rising is terminated（1）Anchor is moved back, control connection top anchor tube, which rises, draws in sap cavity（20）Two four-ways
Valve（8）Releasing top anchor tube, which rises, draws in sap cavity（20）Hydraulic locking, then control connection top anchor tube move back anchor back to the fluid chamber（21）Open, will
Hydraulic oil injection top anchor tube moves back anchor back to the fluid chamber（21）, push up anchor tube piston and move down, complete top anchor tube and move back anchor；
E. top pressing device（2）Move back anchor：Push up anchor tube（1）After withdrawal, then connection top anchor tube is controlled to move back anchor back to the fluid chamber（21）Two four-ways
Valve（8）Hydraulic oil injection top pressing device is moved back into anchor oil back chamber（10）, make middle cylinder piston（9）Move down, retract piston cylinder inner casing
（12）Middle extreme lower position, so as to realize top pressing device（2）Move back the whole step of anchor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574962.1A CN107265332B (en) | 2017-07-14 | 2017-07-14 | Double-loop secondary tensioning jack and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574962.1A CN107265332B (en) | 2017-07-14 | 2017-07-14 | Double-loop secondary tensioning jack and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107265332A true CN107265332A (en) | 2017-10-20 |
| CN107265332B CN107265332B (en) | 2023-05-26 |
Family
ID=60073537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710574962.1A Active CN107265332B (en) | 2017-07-14 | 2017-07-14 | Double-loop secondary tensioning jack and use method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN107265332B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108584762A (en) * | 2018-07-05 | 2018-09-28 | 上海市机械施工集团有限公司 | A kind of use can be used for replacing in the process the tool anchor device of centre-hole jack |
| CN110043531A (en) * | 2019-04-04 | 2019-07-23 | 北京航天发射技术研究所 | A kind of fastening system and method based on electro-hydraulic integrated push rod horizontal trasportation equipment |
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| CN108584762A (en) * | 2018-07-05 | 2018-09-28 | 上海市机械施工集团有限公司 | A kind of use can be used for replacing in the process the tool anchor device of centre-hole jack |
| CN110043531A (en) * | 2019-04-04 | 2019-07-23 | 北京航天发射技术研究所 | A kind of fastening system and method based on electro-hydraulic integrated push rod horizontal trasportation equipment |
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