CN110240082A - The ultra-thin more bar hydraulic jacks of one kind and its operating method - Google Patents
The ultra-thin more bar hydraulic jacks of one kind and its operating method Download PDFInfo
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- CN110240082A CN110240082A CN201910533063.6A CN201910533063A CN110240082A CN 110240082 A CN110240082 A CN 110240082A CN 201910533063 A CN201910533063 A CN 201910533063A CN 110240082 A CN110240082 A CN 110240082A
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- piston rod
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- 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
-
- 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
- B66F3/46—Combinations of several jacks with means for interrelating lifting or lowering movements
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The purpose of the application is to provide a kind of ultra-thin more bar hydraulic jacks, ultra-thin more bar hydraulic jacks include at least two cylinder bodies arranged side by side, each shape of block size is identical, piston rod is set in each cylinder body, and adjacent cylinder body shares casing wall, first passage is equipped in ultra-thin more bar hydraulic jacks and second channel comes for input/output hydraulic oil in cylinder body, change the oil pressure of jacking stress chamber and falling stress chamber in cylinder body, realize the jacking and falling of jack, the upper surface of piston rod is equipped with saddle, the contact surface of the saddle and piston rod is spherical arc shape contact surface, the saddle is connect by screw with piston rod, the saddle is set to pass through sliding rotation to adjust the flatness for jacking face between piston rod and bridge pad.Ultra-thin more bar hydraulic jacks provided herein are suitable for lesser space, and easy to use, and occupied area is small, and top lift is big.
Description
Technical field
The present invention relates to a kind of ultra-thin more bar hydraulic jacks and its operating methods, are especially suitable for being mounted on bridge pad pad
The ultra-thin more bar hydraulic jacks of the large-tonnage of extra small space construction operation between stone and pier stud edge.
Background technique
With the rapid development of our country's economy, since especially reforming and opening up to the outside world, urbanization process is accelerated year by year, resident trip
It takes a bus instead of walking, vehicle increases considerably, in addition motor vehicle and non-motor vehicle, and vehicle and interfering with each other for pedestrian are on the rise, often
The problem of level crossing mode of transportation of rule has been not suitable with, congested in traffic to solve, the decline of speed, accident increases, it is major
Viaduct and through street are built in city in succession.Crossings on different level formula viaduct and ring road are used to all level crossings, make Yuanping City
Wagon flow on cross-channel mouth is crossed on different elevations, from spatially separate, take their own roads, do not interfere with each other, thus improve speed and
Going through ability.
Overhead expressway is while offering convenience, but it has also been found that bridge pad is compared with destroying vulnerable to biasing, beam body at that time
Structure will thoroughly lose buffer function, will jeopardize traffic safety.In this case, jacking replacement bridge pad is also by gesture must
Row, because Overhead is located at crowded urban district, bridge floor is seething up and down, must be influenced with traditional bracing members jack-block
Traffic above-ground and construction is inconvenient, cost is higher, at this moment usually considers direct in bent cap or pier stud top arrangement Thin type hydraulic jack
Jack case, plate-girder baseplane.Certainly arranging traditional Thin type hydraulic jack, there is also following some disadvantages:
First: existing Thin type hydraulic jack top power is mostly in 5-150T, when top bridge list pier support reaction is larger,
It must arrange multiple or multiple rows of traditional Thin type hydraulic jack, this needs pier top or bent cap top surface to have constructing operation more than needed flat
Face, once excessively close apart from pier stud edge, then necessity takes certain reinforcement measure to prevent cleavage fracture.
Secondly: with Thin type hydraulic jack jacking tonnage improve, then itself have to height of cylinder must also increase；One
As for the Thin type hydraulic jack body height of 150T also at least will reach 100mm or so, and bearing rod goes out cylinder height only
There is 14mm.If to consider to cooperate side arrangement cushion block support repeatedly jacking when jacking 10mm is unsatisfactory for extraction support condition.
In addition: for traditional Thin type hydraulic jack bearing rod in jacking, the side of jack needs cushioning block to follow jacking
Protection, the height of cushion block is concordant with very heavy heights of roofs padded with the raising of top lifting height, and not so easily jacking is come to nothing, in this way
Bent cap or pier top face is more required there are enough placement-faces.
It is last: the pressure stabilizing of traditional Thin type hydraulic jack and design protection not enough in place, in the construction process, if encountering electricity
When road or oil path failure, hydraulic system decompression may cause and so that piston rod is lost hydraulic holding power causes to fall after rise, cause safety
Hidden danger.
Summary of the invention
The shortcomings that for the above-mentioned prior art or deficiency, the application technical problems to be solved are:
Thin type hydraulic jack how in bridge pad apart from pier stud edge area is smaller or bridge pad and beam body height
In both lower biggish situations of jack-up construction difficulty of headroom, biggish top lift is provided, large-scale heavy duty works is met
Jack-up construction demand.
In order to solve the above technical problems, this application provides a kind of ultra-thin more bar hydraulic jacks, ultra-thin more bar liquid
Pressing jack includes at least two cylinder bodies arranged side by side, and the identical and adjacent cylinder body of each shape of block size shares casing wall,
First passage is equipped in ultra-thin more bar hydraulic jacks and second channel comes for input/output hydraulic oil in cylinder body；
Piston rod is set in each cylinder body, the upper surface of piston rod is equipped with saddle, contact of the saddle with piston rod
Face is spherical arc shape contact surface, and can be slided along the spherical arc shape contact surface.The saddle is connect by screw with piston rod, and institute is made
It states saddle and adjusts the flatness for jacking face between piston rod and bridge pad by sliding rotation；
It is equipped with jacking stress chamber between the cylinder body and the bottom of piston rod, is set between the cylinder body and the side wall of piston rod
Have and fall stress chamber, the jacking stress chamber and first passage connection, the falling stress chamber and second channel connection after rise, is jacking
Under state, the first passage is increased as oil discharge passage by the first passage as oil inlet passage, the second channel
It is described jacking stress chamber oil mass come increase it is described jacking stress chamber oil pressure, pass through the second channel reduce fall after rise stress chamber
Oil mass reduce the oil pressure for falling stress chamber after rise, realize piston rod jacking；Under falling state, the first passage
As oil discharge passage, the second channel increases the oil for falling stress chamber after rise as oil inlet passage, by the second channel
It measures to increase the oil pressure for falling stress chamber after rise, the oil mass of the jacking stress chamber is reduced to reduce by the first passage
The oil pressure for pushing up deep stress chamber is stated, realizes that the piston rod is fallen after rise.
Compared with prior art, the application has the following beneficial effects:
Ultra-thin more bar hydraulic jacks provided by the present application are arranged side by side in conjunction with multiple cylinder bodies, and every two adjacent cylinders share
Casing wall compares multiple independent Thin type hydraulic jacks, reduces overall dimension, to reduce the face in mounting arrangements face
Product requires.
Ultra-thin more bar hydraulic jacks provided by the present application are equipped with saddle, rotate adjustable piston by the sliding of saddle
The inclination angle of bar and bridge base contacts face, can effectively prevent jacking face and phenomenon of coming to nothing occurs.It is utilized compared to existing slim jack
Jump a queue levelling cushion block mode improve piston rod and bridge base contacts face inclination angle mode, the application operation is simpler, and
Jacking stability, safety are more preferable.
Further, overload protection valve and overflow ducts, the mistake are equipped in ultra-thin more bar hydraulic jack cylinder bodies
It carries protection valve and connects jacking stress chamber and the separate cavities outside jack, when load force is excessive, institute by overflow ducts
State jacking stress chamber hydraulic oil automatic overflow to the separate cavities, can be to avoid the damage for causing jack in load excessive
It is bad.
Further, sealing ring is equipped between the piston rod and cylinder body, the sealing ring is used for sealing piston bar and cylinder
The gap of body, to guarantee that oil pressure when jacking is stablized.
Further, the piston rod surface welds brass, the gap of further sealing piston bar and cylinder body, and prevents liquid
Pressure oil pollutes sealing ring.
Further, the jack outer wall is equipped with technique plug, and the technique plug is connect with first passage, by tearing open
The technique plug is unloaded, the maintenance and maintenance of jack are convenient for.
Further, the saddle upper surface is equipped with notch, increases the frictional force of saddle upper surface.
Further, the angular range of saddle sliding rotation is 0-30 °, jack and bridge base contacts face not
In the case where smooth, pass through the voluntarily adjustment of saddle, thus it is possible to vary the inclination angle of jack and bridge base contacts face prevents from jacking
There is phenomenon of coming to nothing in face.
A kind of operating method using ultra-thin more bar hydraulic jacks as described in any one of claims 1 to 7, including
Following steps:
Step 1: ultra-thin more bar hydraulic jacks being mounted between bridge pad and pier stud, is slided and is revolved by the saddle
The contact inclination angle for transferring adjustment bridge pad and the jack avoids the jacking emaciated face between piston rod and bridge pad empty.
Step 2: increasing the oil mass of the jacking stress chamber to increase the oil pressure for pushing up deep stress chamber, reduce and fall stress after rise
The oil mass of chamber reduces the oil pressure for falling stress chamber after rise, jacks piston rod steadily, when jacking stroke completion, in cylinder body and bridge
Pressure maintaining cushion block is filled between beam support, then the bridge pad of extraction damage, completes the installation of new bridge pad.
Step 3: increasing the oil mass of the jacking stress chamber to increase the oil pressure for pushing up deep stress chamber, reduce and fall stress after rise
The oil mass of chamber reduces the oil pressure for falling stress chamber after rise, jacks piston rod again, extracts pressure maintaining cushion block out.
Step 4: increasing the oil mass for falling stress chamber after rise to increase the oil pressure for falling stress chamber after rise, reduce the jacking
The oil mass of stress chamber reduces the oil pressure for pushing up deep stress chamber, falls piston rod steadily after rise.
Further, the pressure maintaining cushion block be equipped with the piston rod quantity and the matched hole of outer diameter, by by cushion block
On hole cushion block is placed in jack cylinder body and bridge pad across piston rod.When jack meets with operation troubles,
Piston rod fall after rise, since cushion block has certain thickness, pressure maintaining effect carrying bogie beam bottom seat can be played, protect bridge structure not by
Damage.
Further, the material of the pressure maintaining cushion block is stainless steel, good pressure-resistant performance.
Ultra-thin more bar hydraulic jacks provided by the present application, occupied area is small, is adapted for mount on bridge pad and pier stud side
Small space construction operation between member, and it is preferable to jack stability, safety.Using this ultra-thin more bar hydraulic jack to bridge
Support construction is simple, safety are good.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1: the sectional elevation schematic diagram of ultra-thin more bar hydraulic jacks in a kind of embodiment of the application；
Fig. 2: the schematic top plan view of ultra-thin more bar hydraulic jacks in a kind of embodiment of the application；
Fig. 3: the left view schematic diagram of ultra-thin more bar hydraulic jacks in a kind of embodiment of the application；
Fig. 4: the structural schematic diagram of ultra-thin more bar hydraulic jack pressure maintaining cushion blocks in a kind of embodiment of the application；
Cylinder body 1, piston rod 2, casing wall 3, the first oil circuit interface 4, the second oil circuit interface 5, first passage 6, second channel 7,
Stress chamber 8 is jacked, falls stress chamber 9, saddle 10, screw 11, sealing ring 12, brass 13, overload protection valve 14, overflow ducts after rise
15, technique plug 16, notch 17, pressure maintaining cushion block 18
Specific embodiment
It is described further below with reference to technical effect of the attached drawing to the design of the application, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
As shown in Figure 1-Figure 3, in a kind of embodiment of the application, this application provides a kind of ultra-thin more bar hydraulic jacks
Top, ultra-thin more bar hydraulic jacks include three cylinder bodies 1 arranged side by side, these three 1 geomeries of cylinder body are identical, and phase
Adjacent cylinder body 1 shares casing wall 3.In this application, the quantity of cylinder body 1 is 3,4,5, the quantity of principle upper cylinder body 1
More than or equal to two, the protection scope of the application is not limited.The ultra-thin more bar hydraulic jacks provided in the present embodiment
Top combines 3 cylinder bodies 1 to be arranged side by side, and every two adjacent cylinders 1 share casing wall 3, compares 3 mutually independent slim jack,
Reduce the outer dimension of hydraulic jack entirety, to reduce ultra-thin more bar hydraulic jacks to the area in mounting arrangements face
It is required that.
First passage 6 and second channel 7 are equipped in ultra-thin more bar hydraulic jacks, first passage 6 passes through the first oil
Road interface 4 is connect with hydraulic power unit, and second channel 7 is connect by the second oil circuit interface 5 with hydraulic power unit, in the control of control system
It is input/output hydraulic oil in the cylinder body 1 of jack under system.
Jacking stress chamber 8, the side wall of the cylinder body 1 and piston rod 2 are equipped between the cylinder body 1 and the bottom of piston rod 2
Between be equipped with and fall stress chamber 9 after rise, the jacking stress chamber 8 and 6 connection of first passage, the falling stress chamber 9 and second channel
7 connection.
Under jacking state, the first passage 6 is used as oil inlet passage, and the second channel 7 is used as oil discharge passage, hydraulic
For oil pump by 6 pairs of 8 oil inlets of jacking stress chamber of the first passage, the oil mass increased in the jacking stress chamber 8 is described to increase
The oil pressure of stress chamber 8 is jacked, it is fuel-displaced by 7 pairs of falling stress chambers 9 of the second channel, reduce the oil mass fallen after rise in stress chamber 9
The oil pressure for falling stress chamber 9 after rise is reduced, realizes that the piston rod 2 jacks；
Under falling state, the first passage 6 is used as oil discharge passage, and the second channel 7 is used as oil inlet passage, passes through
The second channel 7 increases the oil mass for falling stress chamber 9 after rise to increase the oil pressure for falling stress chamber 9 after rise, passes through described the
The oil mass of the jacking stress chamber 8 is reduced to reduce the oil pressure for pushing up deep stress chamber in one channel 6, realizes that the piston rod 2 returns
It falls.
The working principle of hydraulic jack is as follows: being based on pascal's principle, the pressure of liquid everywhere is consistent, is balancing
System in, the pressure that smaller piston upper applies is smaller, and the pressure applied on big piston is also bigger, in this way
It is able to maintain the static of liquid.So by the transmitting of liquid, different pressure on available difference end, to reach power
Transmitting.Using the pressure difference of jacking stress chamber 8 and falling stress chamber 9 in the application, the jacking and falling of hydraulic jack are realized.
Piston rod 2 is all set in three cylinder bodies 1 in the present embodiment, and the upper surface of piston rod 2 is equipped with saddle 10, the saddle
The contact surface of seat 10 and piston rod 2 is spherical arc shape contact surface, and the saddle 10 is connect by screw 11 with piston rod 2, and saddle
10 be free to sliding rotation, and saddle 10 is rotated by sliding and jacks face between adjustable piston rod 2 and bridge pad
Flatness.It needs to adjust using levelling cushion block between piston rod 2 and bridge pad compared to traditional Thin type hydraulic jack
Inclination angle, in the application the setting of saddle 10 make Thin type hydraulic jack using more convenient, without installing levelling cushion block
The installation space of jack can further be saved.
As Figure 1-Figure 2, overload protection valve 14 is equipped in ultra-thin more bar hydraulic jack cylinder bodies 1 provided herein
With overflow ducts 15, the overload protection valve 14 is by the connection of overflow ducts 15 jacking stress chamber 8 and outside jack
Separate cavities.In jack jacking loading process, if road surface has overload of vehicle to cause load force excessive, jack may cause
Overload damage.The setting of overload protection valve 14, can be when load force be excessive, and overload protection valve 14 can automatically turn on, the top
The hydraulic oil meeting automatic overflow of stress chamber 8 is risen to the separate cavities, it is possible to prevente effectively from causing jack in load excessive
Damage；When road vehicles sail out of, load force is returned normally, and the hydraulic oil in separate cavities can automatically return in jacking stress chamber 8.
Shown in Fig. 1, sealing ring 12 is equipped between the piston rod 2 and cylinder body 1, sealing ring 12 is embedded in each piston rod 2
Between cylinder body 1, for the gap of sealing piston bar 2 and cylinder body 1, to guarantee that oil pressure when jacking is stablized.In addition, the piston
2 surface of bar welding brass 13, the gap of energy further sealing piston bar 2 and cylinder body 1, and due to the isolation of brass 13, it can prevent
Hydraulic oil pollution sealing ring 12.
It is required according to the technical construction of hydraulic jack, 1 outer wall of cylinder body of the jack is equipped with technique plug 16, described
Technique plug 16 is connect with first passage 6, and the technique plug 16 is detachable, is convenient for the maintenance and maintenance of jack.
Shown in Fig. 2, the saddle upper surface is equipped with notch 17, can increase the frictional force at 10 top of saddle, plays anti-skidding
Effect.
Ultra-thin more bar hydraulic jacks provided in this embodiment, saddle 10 can slide rotation automatically, preferably, saddle 10
The angular range of sliding rotation is 0-30 °, in the case where jack and the face out-of-flatness of bridge base contacts, passes through saddle 10
Voluntarily adjustment, thus it is possible to vary the inclination angle of jack and bridge base contacts face prevents jacking face from phenomenon of coming to nothing occur.
A method of bridge pad being replaced using ultra-thin more bar hydraulic jacks provided by the present embodiment, including following
Step:
Step 1: ultra-thin more bar hydraulic jacks being mounted between bridge pad and pier stud, are slided by the saddle 10
Rotation avoids the jacking emaciated face between piston rod 2 and bridge pad to adjust contact inclination angle of the bridge pad with the jack
It is empty.
Step 2: hydraulic oil pump being controlled by control system, increases the oil mass of jacking stress chamber 8, through first passage 6 to add
The oil pressure for pushing up deep stress chamber described greatly, the oil mass for reducing falling stress chamber 9 through second channel 7 reduce the falling stress chamber 9
Oil pressure makes to push up deep stress chamber and fall stress chamber 9 after rise to generate biggish pressure difference, to make piston rod 2 jack steadily, when jacking is gone
When journey is completed in stable state, pushes up deep stress chamber and be consistent with 9 oil pressure of stress chamber is fallen after rise.At this time in cylinder body 1 and bridge branch
Pressure maintaining cushion block 18 is filled between seat, then the bridge pad of extraction damage, completes the installation of new bridge pad.The pressure maintaining cushion block
18 material is stainless-steel sheet, has certain thickness, good pressure-resistant performance.It is as shown in Figure 4 with ultra-thin more bars shown in FIG. 1
A kind of hydraulic jack matched pressure maintaining cushion block 18 has 3 holes, and the outer diameter of the diameter piston bar 2 in 3 holes on pressure maintaining cushion block 18
Matching, pressure maintaining cushion block 18 can be placed in jack cylinder body 1 and bridge pad across piston rod 2.Even if jack is met with
Operation troubles, such as fault or oil path failure, piston rod 2 is fallen after rise suddenly, since pressure maintaining cushion block 18 has certain thickness,
Pressure maintaining effect carrying bogie beam bottom seat can be played, to protect bridge structure not damaged.The structure of pressure maintaining cushion block 18 is not just for attached
A kind of structure shown in Fig. 4, according to the difference of jack cylinder body quantity, the structure of pressure maintaining cushion block 18 can also change therewith, principle
Upper pressure maintaining cushion block 18 only needs to meet the quantity of institute's apertured and internal diameter is matched in the quantity outer diameter of piston rod.In the application
In, when replacing bridge pad, the top lifting height of piston rod 2 is generally 1-2cm, pressure maintaining cushion block 18 with a thickness of 0.5-2cm.
Step 3: increase the oil mass of the jacking stress chamber 8 to increase the oil pressure for pushing up deep stress chamber 8, reduce fall after rise by
The oil mass of power chamber 9 reduces the oil pressure for falling stress chamber 9 after rise, jacks piston rod 2 again, extracts pressure maintaining cushion block 18 out.
Step 4: increasing the oil mass for falling stress chamber 9 after rise to increase the oil pressure for falling stress chamber 9 after rise, reduce the top
The oil mass of stress chamber 8 is risen to reduce the oil pressure for pushing up deep stress chamber 8, falls piston rod 2 steadily after rise.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
Under the premise of the principle and substance of the present invention, many changes and modifications may be made, but these change and
Modification each falls within protection scope of the present invention.
Claims (10)
1. a kind of ultra-thin more bar hydraulic jacks, which is characterized in that ultra-thin more bar hydraulic jacks include arranged side by side
At least two cylinder bodies, the identical and adjacent cylinder body of each shape of block size share casing wall, ultra-thin more bar hydraulic jacks
It is interior to come equipped with first passage and second channel for input/output hydraulic oil in cylinder body；
Set piston rod in each cylinder body, the upper surface of piston rod is equipped with saddle, and the contact surface of the saddle and piston rod is
Spherical arc shape contact surface, and being slided along the spherical arc shape contact surface, so that the saddle is passed through sliding rotation adjust piston rod with
The flatness in face is jacked between bridge pad；
It is equipped with jacking stress chamber between the cylinder body and the bottom of piston rod, is equipped with back between the cylinder body and the side wall of piston rod
Stress chamber, the jacking stress chamber and first passage connection, the falling stress chamber and second channel connection are fallen, in jacking state
Under, the first passage is as oil inlet passage, and the second channel is as oil discharge passage, by described in the first passage increase
The oil mass of stress chamber is jacked to increase the oil pressure for pushing up deep stress chamber, the oil for falling stress chamber after rise is reduced by the second channel
It measures to reduce the oil pressure for falling stress chamber after rise, realizes the piston rod jacking；Under falling state, the first passage conduct
Oil discharge passage, the second channel as oil inlet passage, by the second channel increase the oil mass for falling stress chamber after rise come
The oil pressure for falling stress chamber after rise is increased, the oil mass of the jacking stress chamber is reduced by the first passage to reduce the top
The oil pressure of deep stress chamber realizes that the piston rod is fallen after rise.
2. ultra-thin more bar hydraulic jacks according to claim 1, which is characterized in that ultra-thin more bar hydraulic jacks
Overload protection valve and overflow ducts are equipped in cylinder body, the overload protection valve connects jacking stress chamber by overflow ducts and is set to
Separate cavities outside jack, when load force is excessive, the hydraulic oil automatic overflow for jacking stress chamber to the separate cavities.
3. ultra-thin more bar hydraulic jacks according to claim 1, which is characterized in that set between the piston rod and cylinder body
There is sealing ring, the sealing ring is used for the gap of sealing piston bar and cylinder body.
4. ultra-thin more bar hydraulic jacks according to claim 3, which is characterized in that the piston rod surface welding is yellow
Copper.
5. ultra-thin more bar hydraulic jacks according to claim 1, which is characterized in that the jack outer wall is equipped with technique
Plug, the technique plug are connect with first passage, and the maintenance and maintenance of jack are carried out by dismantling the technique plug.
6. ultra-thin more bar hydraulic jacks according to claim 1, which is characterized in that notch is equipped at the top of the saddle,
Increase the frictional force of saddle upper surface.
7. ultra-thin more bar hydraulic jacks according to claim 1, which is characterized in that the angle of the saddle sliding rotation
Range is 0-30 °.
8. a kind of operating method using ultra-thin more bar hydraulic jacks as described in any one of claims 1 to 7, feature
It is, the described method comprises the following steps:
Step 1: ultra-thin more bar hydraulic jacks are mounted between bridge pad and pier stud, by the saddle slide rotation come
The contact inclination angle for adjusting bridge pad and the jack avoids the jacking emaciated face between piston rod and bridge pad empty.
Step 2: increasing the oil mass of the jacking stress chamber to increase the oil pressure for pushing up deep stress chamber, reduce and fall stress chamber after rise
Oil mass reduces the oil pressure for falling stress chamber after rise, jacks piston rod steadily, when jacking stroke completion, in cylinder body and bridge branch
Pressure maintaining cushion block is filled between seat, then the bridge pad of extraction damage, completes the installation of new bridge pad.
Step 3: increasing the oil mass of the jacking stress chamber to increase the oil pressure for pushing up deep stress chamber, reduce and fall stress chamber after rise
Oil mass reduces the oil pressure for falling stress chamber after rise, jacks piston rod again, extracts pressure maintaining cushion block out.
Step 4: increasing the oil mass for falling stress chamber after rise to increase the oil pressure for falling stress chamber after rise, reduce the jacking stress
The oil mass of chamber reduces the oil pressure for pushing up deep stress chamber, falls piston rod steadily after rise.
9. the operating method of ultra-thin more bar hydraulic jacks according to claim 8, which is characterized in that the pressure maintaining cushion block
Be equipped with the piston rod quantity and the matched hole of outer diameter, by the way that the hole on pressure maintaining cushion block is passed through piston rod for pressure maintaining cushion block
It is placed between jack cylinder body and bridge pad.
10. the operating method of ultra-thin more bar hydraulic jacks according to claim 8, which is characterized in that the pressure maintaining pad
The material of block is stainless steel.
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| CN201910533063.6A CN110240082A (en) | 2019-06-19 | 2019-06-19 | The ultra-thin more bar hydraulic jacks of one kind and its operating method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112978606A (en) * | 2021-02-05 | 2021-06-18 | 南京万通城市建设设计咨询有限公司 | Jack for replacing bridge support |
| CN114876935A (en) * | 2022-04-27 | 2022-08-09 | 中国舰船研究设计中心 | Internal and external balance type hydraulic nut for mounting ship propeller and mounting method thereof |
| CN115676688A (en) * | 2022-10-10 | 2023-02-03 | 江苏凯恩特机械设备制造有限公司 | Step-by-step heightening type lifting equipment |
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| CN112978606A (en) * | 2021-02-05 | 2021-06-18 | 南京万通城市建设设计咨询有限公司 | Jack for replacing bridge support |
| CN112978606B (en) * | 2021-02-05 | 2022-07-29 | 南京万通城市建设设计咨询有限公司 | Jack for replacing bridge support |
| CN114876935A (en) * | 2022-04-27 | 2022-08-09 | 中国舰船研究设计中心 | Internal and external balance type hydraulic nut for mounting ship propeller and mounting method thereof |
| CN114876935B (en) * | 2022-04-27 | 2024-04-26 | 中国舰船研究设计中心 | Internal and external balance type hydraulic nut for installing ship propeller and installation method thereof |
| CN115676688A (en) * | 2022-10-10 | 2023-02-03 | 江苏凯恩特机械设备制造有限公司 | Step-by-step heightening type lifting equipment |
| CN115676688B (en) * | 2022-10-10 | 2023-11-07 | 江苏凯恩特机械设备制造有限公司 | Step-by-step elevating equipment |
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