CN112850544B - Composite piston type jack for load box - Google Patents
Composite piston type jack for load box Download PDFInfo
- Publication number
- CN112850544B CN112850544B CN202110157613.6A CN202110157613A CN112850544B CN 112850544 B CN112850544 B CN 112850544B CN 202110157613 A CN202110157613 A CN 202110157613A CN 112850544 B CN112850544 B CN 112850544B
- Authority
- CN
- China
- Prior art keywords
- piston
- concave
- plate
- liquid
- convex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000002131 composite material Substances 0.000 title abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 94
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 230000003068 static effect Effects 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 4
- 238000012545 processing Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 description 30
- 238000006243 chemical reaction Methods 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000002002 slurry Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 230000007704 transition Effects 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Types And Forms Of Lifts (AREA)
- Actuator (AREA)
Abstract
The invention relates to a single-liquid-path composite piston jack for a load box, which is mainly used in a foundation pile self-balancing static load test. A composite piston jack for a load box comprises a cylinder body and a piston, wherein a top plate of the cylinder body is connected with a top plate of the load box, a through hole for allowing the piston to move up and down is formed in a bottom plate of the cylinder body, and a liquid inlet is formed in the side wall of the cylinder body; the piston comprises a convex piston and a concave piston, the convex piston comprises a piston plate and a piston column, the piston plate is positioned at the top of the piston column, a bulge is arranged at the top of the piston plate, the piston column is inserted into the inner cavity of the concave piston, a channel is formed in the convex piston and used for communicating the concave piston with a liquid inlet, a liquid outlet is formed in the side wall of the concave piston, and a bottom plate of the concave piston is connected with a bottom plate of a load box. The invention has the following advantages: 1. realizing small-area large-tonnage pressurizing detection; 2. the pile body strength and the integrity of the foundation pile are ensured; 3. the processing difficulty is reduced; 4. after static load test pile is realized, the loading liquid is discharged first, and grouting is then carried out.
Description
Technical Field
The invention relates to a single-liquid-path composite piston jack for a load box, which is mainly used in a foundation pile self-balancing static load test.
Background
In the self-balancing static load test of foundation piles, a load box is required to be used, and the most main component in the load box is a jack.
When the existing jack is pressurized, the thrust of the small-area jack is limited, and the small-area jack cannot meet the large-tonnage pressurization detection.
Moreover, at present, the jack generally has only one liquid injection pipe, so that the liquid which is never solidified is filled between the cylinder body and the piston of the load box body after the test, and after the self-balancing static load test of the foundation pile, the liquid in the load box cylinder is extruded to generate displacement under the vertical compression state of the engineering. Although the existing load box can realize liquid drainage and grouting through two pipes, because the two pipes are all at the same elevation on the side edge of the upper end of the cylinder body, the liquid below the elevation of the liquid outlet can not be drained completely due to the fact that the two pipes are only extruded above the elevation of the liquid outlet in grouting, and the injected slurry is diluted by retained liquid, so that the concentration of the slurry is reduced, the final setting strength of the slurry is seriously reduced, and the reinforcing requirement is not met.
Disclosure of Invention
The invention aims to provide a composite piston jack for a load box, which can increase thrust under the condition of the same jack bottom area and realize small-area large-tonnage pressurization detection.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a composite piston jack for a load box comprises a cylinder body and a piston, wherein a top plate of the cylinder body is connected with a top plate of the load box, a through hole for allowing the piston to move up and down is formed in a bottom plate of the cylinder body, and a liquid inlet is formed in the side wall of the cylinder body; the piston includes convex piston, concave piston, the convex piston includes the piston board, the piston post, the piston board is located piston post top, with cylinder body inner chamber adaptation, its top is equipped with the arch, be used for separating piston board and cylinder body roof, the piston post inserts concave piston inner chamber, the passageway has been seted up on the convex piston, be used for intercommunication concave piston and inlet, be provided with spacing portion at the top of concave piston, spacing portion radially outwards extends along concave piston, with cylinder body inner chamber adaptation, when concave piston moves down, spacing with the cylinder body bottom plate prevents that concave piston from shifting out the cylinder body downwards, the liquid outlet has been seted up on the lateral wall of concave piston, the liquid outlet is located cylinder body bottom plate below, the bottom plate and the load case bottom plate of concave piston are connected.
Preferably, a reaction beam is installed in the cylinder, the reaction beam is arranged around the inner cavity of the cylinder, and the piston plate and the limit part are respectively limited at the upper part and the lower part.
Preferably, the bottom of the piston column is contacted with the bottom of the cavity of the concave piston, and when liquid is injected, the pressure of the liquid on the convex piston is transferred to the bottom surface of the concave piston through the piston column, so that superposition and compounding of the pressure of the convex piston and the pressure of the concave piston are realized.
Preferably, the inlet of the passage on the male piston is located at the axial center of the piston plate and the outlet is located at the side wall of the piston post.
Preferably, a jack post is installed between the counter-force beam and the cylinder top plate, and the jack post passes through a through hole formed in a position corresponding to the piston plate, so as to further limit the upward movement of the counter-force beam.
Preferably, the piston plate is made of metal, the protrusions are magnets, and the magnets are adsorbed on the piston plate.
Preferably, the cylinder top plate, the cylinder bottom plate and the cylinder are assembled in an assembled mode.
Preferably, the piston plate is detachably connected to the piston post.
Preferably, the piston rod further comprises a hollow connecting rod for connecting the piston plate and the piston column, the outer diameter of the hollow connecting rod is matched with the channels between the piston plate and the piston column, the inside of the hollow connecting rod is hollow, and the hollow connecting rod is communicated with the channels on the piston column.
Working principle: when liquid is injected, the liquid flows into the concave piston below through the channel in the middle of the convex piston; when the concave piston is filled with liquid, the liquid is continuously pressurized, and at the moment, the pressure at the convex piston plate is equal to the pressure in the concave piston groove, namely, the concave piston is pressurized while the convex piston is pressurized; therefore, the pressure of the liquid to the convex piston is transmitted to the bottom surface of the concave piston through the convex piston column, so that the superposition and recombination of the pressures of the two pistons are realized. The pressurizing value is increased under the condition of unchanged unit diameter, so that the pressurizing device can be used for pressurizing detection with small area and large tonnage; the cylindrical piston plate and magnet combination is adopted, namely, the piston plate is processed into a plane, the material is metal, and the magnet is adsorbed on the piston plate, so that a convex platform is formed, and the position of the magnet can be moved, so that a liquid channel in the middle of the convex piston can be avoided, and the liquid channel is kept smooth during liquid injection.
Compared with the prior art, the invention has the following advantages:
1. The convex piston and the concave piston are combined into an integrated composite piston; when the liquid is injected, the liquid flows into the concave piston below through the channel in the middle of the convex piston, the whole liquid path is integrated, the pressure is equal, superposition and compounding can be carried out, the thrust can be increased under the condition of the same jack bottom area, and the small-area large-tonnage pressurization detection is realized;
2. The grouting device can ensure the quality of the slurry and improve the filling rate while grouting, so that the reinforced load box and the engineering pile form a continuous whole through grouting and reinforcing the load box, the pile body strength and the integrity of the foundation pile are ensured, and the upper load of the load box is effectively transferred to the pile body at the lower part of the load box;
3. The jack can be split into a plurality of parts for production and processing respectively, so that the production difficulty is reduced, the production cost is reduced, and the production efficiency is improved;
4. the cylindrical piston plate and the magnet are combined to form the convex platform, so that the processing difficulty and cost can be reduced, and meanwhile, the position of the magnet can be moved to avoid a liquid channel in the middle of the piston, so that the liquid channel is kept smooth during liquid injection;
5. The convex piston plate and the convex piston column are connected together through the convex piston hollow connecting rod, so that the original piston formed by one-step processing is improved into a piston formed by assembling a plurality of parts, the processing difficulty is reduced, and the production cost is reduced;
6. Through one advance one two pipe, can realize after the static load test stake, discharge the loading liquid earlier, carry out the slip casting again to avoid single tube load case to be full of the loading liquid that never solidifies between the cylinder body of load box body and the piston after the experiment, appear the stake and produce the condition that extrudes liquid under engineering vertical load effect and cause foundation pile downward displacement.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a cylinder;
Fig. 3 is a schematic structural view of a cylinder body, wherein (a) is a perspective view of the cylinder body, and (b) is a sectional view of the cylinder body along an axial direction of a liquid inlet;
FIG. 4 is a schematic view of a cylinder head plate, wherein (a) is a perspective view of the cylinder head plate and (b) is an axial cross-sectional view of the cylinder head plate;
FIG. 5 is a schematic structural view of a male piston;
FIG. 6 is a schematic view of the convex piston plate structure of FIG. 5, wherein (a) is a perspective view of the convex piston plate and (b) is a cross-sectional view of the convex piston plate 1-1;
FIG. 7 is a schematic view of the male piston-cylinder structure of FIG. 5, wherein (a) is a perspective view of the male piston-cylinder and (b) is an axial cross-sectional view of the male piston-cylinder;
FIG. 8 is an enlarged view of the male piston hollow connecting rod of FIG. 5, wherein (a) is a perspective view of the male piston hollow connecting rod and (b) is an axial cross-sectional view of the male piston hollow connecting rod;
FIG. 9 is an enlarged view of a top post;
Fig. 10 is a diagram of the reaction force Liang Fangda, in which (a) is a diagram of the reaction force Liang Liti and (b) is a diagram of the reaction force beam axial cross-section;
FIG. 11 is a schematic view of a concave piston structure, wherein (a) is a perspective view of the concave piston and (b) is an axial sectional view of the concave piston at a liquid outlet position;
FIG. 12 is an enlarged view of the cylinder floor;
FIG. 13 is an assembly flow chart of a product of an embodiment of the present invention, including (a) - (g);
FIG. 14 is a flowchart of an application of an embodiment of the present invention, including (a) - (g);
In the figure, 1, a cylinder body; 1-1, a cylinder body; 1-2, cylinder top plate; 1-1-1, perforating; 1-1-2, upper end steps; 1-1-3, middle end steps; 1-1-4, a liquid inlet; 1-1-5, screw thread; 1-2-1, upper end; 1-2-2, lower end; 1-2-3, a sealing groove and a sealing ring; 1-2-4, screw threads;
2. A male piston; 2-1, a convex piston plate; 2-2, a male piston post; 2-3, a convex piston hollow connecting rod; 2-4, magnet; 2-1-1, a sealing groove and a sealing ring; 2-1-2, a jack-prop channel; 2-1-3, a convex piston hollow connecting rod channel; 2-2-1, a convex piston hollow connecting rod channel; 2-2-2, a liquid channel; 2-3-1, a liquid channel; 2-3-2, sealing groove and sealing ring;
3. a top column; 3-1, sealing the groove and the sealing ring;
4. A reaction beam; 4-1, sealing the groove and the sealing ring; 4-2, a piston channel;
5. a concave piston; 5-1, a step limiting structure; 5-2, a liquid outlet; 5-3, screw threads;
6. A cylinder bottom plate; 6-1, screw threads; 6-2, sealing groove and sealing ring.
Detailed Description
It should be noted that, in the present embodiment, the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like are described in accordance with the drawings, and do not limit the present invention; in addition, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, directly connected or indirectly connected via an intermediary. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention is further described in detail below with reference to fig. 1-14: a composite piston jack for a load box, as shown in fig. 1, comprises a cylinder body 1, a convex piston 2, a top column 3, a counter-force beam 4, a concave piston 5 and a cylinder body bottom plate 6; the cylinder body 1 consists of a cylinder body 1-1 and a cylinder body top plate 1-2, the cylinder body top plate 1-2 is connected with a load box top plate, a through hole for accommodating the concave piston 5 to move up and down is formed in a cylinder body bottom plate 6, and a liquid inlet 1-1-4 is formed in the side wall of the cylinder body 1; the piston comprises a convex piston 2 and a concave piston 5, the convex piston 2 comprises a convex piston plate 2-1, a convex piston column 2-2, a convex piston hollow connecting rod 2-3 and a magnet 2-4, the convex piston plate 2-1 is positioned at the top of the convex piston column 2-2 and is matched with the inner cavity of the cylinder body 1, the magnet 2-4 is positioned at the top of the magnet and is used for separating the convex piston plate 2-1 from the cylinder body top plate 1-2, the convex piston column 2-2 is matched with the inner cavity of the concave piston 5, the convex piston hollow connecting rod 2-3 is used for connecting the convex piston plate 2-1 and the convex piston column 2-2, the inside of the convex piston hollow piston is hollow, a channel is formed in the corresponding position of the convex piston plate 2-1 and the convex piston column 2-2, the convex piston hollow connecting rod 2-3 is communicated with a liquid inlet 1-1-4, the channel and the concave piston 5, a step limiting structure 5-1 is arranged at the top of the concave piston 5, the step limiting structure 5-1 extends outwards along the concave piston 5 and is matched with the inner cavity of the cylinder body 1, when the concave piston 5 moves downwards, the concave piston 5 is limited downwards, the concave piston is prevented from moving downwards by the cylinder body 5, the concave piston is connected with a bottom plate 6, the concave piston 5 is prevented from moving downwards, the liquid is connected with the bottom plate 5 and the concave piston 5, and is connected with the bottom plate 2 and the concave piston 5.
In this embodiment, the specific structure adopts assembly production and assembly, that is, the jack is split into a plurality of parts, and production and processing are performed respectively.
As shown in fig. 2-3, the top of the cylinder body 1-1 is provided with an opening 1-1, the radial dimension of the opening is smaller than the radial dimension of the inner cavity of the cylinder body 1-1, so that an upper end step 1-1-2 is formed between the edge of the opening 1-1-1 and the inner wall of the cylinder body, a middle end step 1-1-3 is arranged near the middle position of the cylinder body 1-1, the radial dimension of the inner cavity of the cylinder body above the middle end step 1-3 is smaller than the radial dimension of the inner cavity of the cylinder body below the middle end step 1-1, a liquid inlet 1-1-4 formed on the side wall of the cylinder body 1 is near the upper end step 1-1-2, an internal thread 1-1-5 is arranged at the bottom of the inner cavity of the cylinder body, and the thread 1-1-5 is matched with the external thread of the cylinder body bottom plate 6; as shown in FIG. 4, the upper end 1-2-1 of the cylinder top plate 1-2 is matched with the opening 1-1-1, the lower end 1-2-2 is matched with the inner cavity of the cylinder, the transition section between the upper end 1-2-1 and the lower end 1-2-2 is matched with the upper end step 1-1-2, a sealing groove and a sealing ring 1-2-3 are arranged on the circumference of the upper end 1-2-1 and used for sealing the cylinder top plate 1-2 and the opening 1-1 of the cylinder, and an internal thread 1-2-4 is arranged at the axle center of the upper end 1-2-1, so that the cylinder top plate is fixed with the load box top plate through a screw or a bolt matched with the sealing groove and the sealing ring 1-2-3.
As shown in fig. 5, the male piston 2 is composed of a male piston plate 2-1, a male piston post 2-2, a male piston hollow connecting rod 2-3 and a magnet 2-4; as shown in fig. 6, the convex piston plate 2-1 is a cylindrical flat plate, a plurality of sealing grooves and sealing rings 2-1-1 are formed along the circumference of the cylinder body and are used for sealing gaps between the convex piston plate 2-1 and the inner wall of the cylinder body, at least two jacking column channels 2-1-2 are formed along the axial direction of the convex piston plate, in the embodiment, the number of the jacking column channels 2-1-2 is four, the jacking column channels 2-1-3 are uniformly distributed along the circumference of the convex piston plate, a convex piston hollow connecting rod channel 2-1-3 is formed at the axis of the convex piston plate 2-1, wherein the jacking column channels 2-1-2 are matched with the jacking column 3, and the convex piston hollow connecting rod channel 2-1-3 is matched with the convex piston hollow connecting rod 2-3; when liquid is injected into the cylinder from the side of the cylinder body, a notch is required to be formed in the piston plate, so that the piston plate is a convex platform, and therefore, when the liquid is injected from the side of the cylinder body, the liquid can enter the cavity to push the piston to displace downwards; as shown in fig. 7, a convex piston hollow connecting rod channel 2-2-1 is formed at the axis of the convex piston column 2-2, the convex piston hollow connecting rod channel 2-2-1 is communicated with and opposite to the convex piston hollow connecting rod channel 2-1-3, the two formed channels are matched with the convex piston hollow connecting rod 2-3, a plurality of liquid channels 2-2-2 are formed along the convex piston hollow connecting rod channel 2-2-1 towards the side wall of the convex piston column, and the liquid channels 2-2-2 have the same structure and are symmetrical; as shown in fig. 8, the hollow connecting rod 2-3 of the convex piston is hollow, and is used as a liquid channel 2-3-1 for communicating the liquid inlet 1-1-4, the liquid channel 2-2-2 and the concave piston 5, and a sealing groove and a sealing ring 2-3-2 are arranged along the circumference of the hollow connecting rod 2-3 of the convex piston for sealing the gap between the hollow connecting rod 2-3 of the convex piston and the hollow connecting rod channel of the convex piston.
As shown in fig. 9, the jack post 3 is a rod-shaped member, a plurality of seal grooves and seal rings 3-1 are provided along the circumference thereof, and the plurality of seal grooves and seal rings 3-1 are distributed up and down, in this embodiment, two seal grooves and seal rings 3-1 are respectively adjacent to the upper portion and the lower portion of the jack post channel 2-1-2, thereby sealing the gap between the jack post 3 and the convex piston plate 2-1.
As shown in fig. 10, the reaction beam 4 is convex, and is arranged around the inner cavity of the cylinder body 1, the interior of the reaction beam is provided with a piston channel 4-2, the piston channel 4-2 is matched with the convex piston column 10, the outer circumference of the reaction beam is matched with the middle end step 1-1-3, and the outer circumference of the reaction beam and the circumference of the piston channel are provided with sealing grooves and sealing rings 4-1 for sealing the gap between the inner wall of the cylinder body above the middle end step 1-1-3 and the reaction beam 4 and the gap between the piston channel 4-2 and the convex piston column 2-2; the reaction beam 4 defines the male piston 2 and the female piston 5 at the upper and lower portions of the cylinder, respectively.
In this embodiment, since the cylinder 1 and the cylinder top plate 1-2 are of a detachable structure, one end of the jack-post 3 abuts against the top of the counter-force beam, and the other end passes through the jack-post channel 2-1-2 and abuts against the bottom of the cylinder top plate 1-2, not only can support the cylinder top plate 1-2, but also the counter-force beam can be restrained from moving upwards, and simultaneously, in the moving process of the convex piston 2, guiding can be provided for the convex piston 2.
As shown in fig. 11, the stepped limit structure 5-1 on the concave piston 5 is adapted to the cylinder bottom plate 6, and when the concave piston 5 moves downward, the stepped limit structure is limited to the cylinder bottom plate 6 to prevent the concave piston 5 from moving downward out of the cylinder 1, the starting position of the liquid outlet 5-2 is below the bottom of the cylinder body 1-1 and is close to the bottom of the concave piston 5, and the bottom plate of the concave piston 5 is connected with the load box bottom plate.
As shown in fig. 12, a thread 6-1 is provided along the circumference of the cylinder bottom plate 6, the thread 6-1 is matched with the thread 1-1-5, and a sealing groove and a sealing ring 6-2 are provided on a through hole of the axis of the cylinder bottom plate 6 for sealing a gap between the concave piston 5 and the cylinder bottom plate 6.
As shown in fig. 13, the assembly flow:
1. Assembling the male piston 2: assembling a convex piston plate 2-1, a convex piston column 2-2 and a convex piston hollow connecting rod 2-3, and adsorbing a magnet 2-4 on the top of the convex piston plate, as shown in fig. 13 (a);
2. Assembling the cylinder body 1: pushing the cylinder top plate 1-2 from below until the cylinder top plate is tightly fitted with the cylinder body, as shown in fig. 13 (b);
3. pushing the male piston 2 from below the cylinder 1 until it abuts against the cylinder top plate 1-2 as shown in fig. 13 (c);
4. Pushing the jack post 3 in from below through the jack post channel 2-1-2 on the convex piston plate 2-1 until it abuts the cylinder top plate 2-1 as shown in fig. 13 (d);
5. Pushing the reaction beam 4 from below until the reaction beam is tightly combined with the middle end step 1-1-3 of the cylinder body 1-1, as shown in fig. 13 (e);
6. Pushing the concave piston 5 into the cylinder 1 from below as shown in fig. 13 (f);
7. the cylinder bottom plate 6 is mounted from below and screwed down as shown in fig. 13 (g).
As shown in fig. 14, the workflow:
1. Filling and pressurizing
1. Closing a liquid outlet 5-2 of the concave piston 5, injecting liquid into a liquid inlet 1-1-4 of the cylinder body, and injecting the liquid into the concave piston 5 along a hollow in a hollow connecting rod of the convex piston and a liquid channel in the convex piston until the concave piston 5 is filled; at this stage, the piston is not displaced, as shown in fig. 14 (a);
2. Continuously injecting liquid for pressurization, and pushing the convex piston 2 to displace downwards by the liquid; simultaneously, the liquid continues to pour into the concave piston along the hollow core in the convex piston hollow core connecting rod 2-3 and the liquid channel in the convex piston column 2-2, and the concave piston is also pushed to displace downwards, as shown in fig. 14 (b);
3. Continuously injecting liquid and pressurizing until reaching the self-balancing static test pile test termination condition required by the design requirement or the detection specification, stopping as shown in fig. 14 (c);
2. inflatable liquid discharge
1. After the liquid injection is completed, starting to charge and discharge liquid, wherein when the liquid is charged and discharged, the liquid inlet 1-1-4 of the cylinder body and the liquid outlet 5-2 of the concave piston are not closed, gas is filled into the cylinder body from top to bottom, and extrusion liquid is discharged from the liquid outlet of the concave piston, as shown in fig. 14 (d);
2. Continuing to charge until the liquid outlet of the concave piston does not discharge any more, which means that the liquid in the cylinder is exhausted, and stopping charging, as shown in fig. 14 (e);
3. Grouting
1. When the liquid outlet of the concave piston is not discharged, grouting is started, and when grouting is performed, the liquid inlet of the cylinder body and the liquid outlet of the concave piston are not closed, the slurry is filled into the cylinder body from top to bottom, and extrusion gas is discharged from the liquid outlet of the concave piston, as shown in fig. 14 (f);
2. grouting is continued until the liquid outlet of the concave piston is stopped after the slurry overflows, as shown in fig. 14 (g).
The above examples are only preferred embodiments of the present invention and do not limit the present invention. The invention can also be partially constructed in an assembled production and assembly mode. It will be appreciated by those skilled in the art that any such extensions, modifications, equivalents, etc. that do not depart from the principles of this invention are intended to be included within the scope of the invention.
Claims (4)
1. A compound piston jack for load case, includes cylinder body and piston, its characterized in that: the cylinder top plate is connected with the load box top plate, a through hole for allowing the piston to move up and down is formed in the cylinder bottom plate, and a liquid inlet is formed in the side wall of the cylinder; the piston comprises a convex piston and a concave piston, the convex piston comprises a piston plate and a piston column, the piston plate is positioned at the top of the piston column and is matched with the inner cavity of the cylinder body, a bulge is arranged at the top of the piston plate and is used for separating the piston plate from the top plate of the cylinder body, the piston column is inserted into the inner cavity of the concave piston, a channel is formed in the convex piston and is used for communicating the concave piston with a liquid inlet, a limiting part is arranged at the top of the concave piston and extends outwards along the radial direction of the concave piston and is matched with the inner cavity of the cylinder body, when the concave piston moves downwards, the limiting part is limited with the bottom plate of the cylinder body to prevent the concave piston from moving downwards out of the cylinder body, a liquid outlet is formed in the side wall of the concave piston and is positioned below the bottom plate of the cylinder body, and the bottom plate of the concave piston is connected with the bottom plate of the load box;
a counter-force beam is arranged in the cylinder body, the counter-force beam surrounds the inner cavity of the cylinder body, and the piston plate and the limiting part are respectively limited at the upper part and the lower part of the counter-force beam;
The inlet of the upper passage of the convex piston is positioned at the axle center of the piston plate, and the outlet is positioned at the side wall of the piston column;
a jacking column is arranged between the counter-force beam and the cylinder top plate, passes through a through hole formed in the corresponding position of the piston plate and is used for further limiting the upward movement of the counter-force beam;
The piston plate is made of metal, the bulge is a magnet and is adsorbed on the piston plate;
The cylinder top plate, the cylinder bottom plate and the cylinder are assembled in an assembling mode;
the working flow of liquid injection pressurization is as follows:
(1) Closing a liquid outlet of the concave piston, injecting liquid into a liquid inlet of the cylinder body, and injecting the liquid into the concave piston along a hollow core in a hollow core connecting rod of the convex piston and a liquid channel in a convex piston column until the concave piston is filled; at this stage, the piston does not displace;
(2) Continuously injecting liquid for pressurization, and pushing the convex piston to displace downwards by the liquid; meanwhile, the liquid continuously fills the concave piston along the hollow core in the hollow core connecting rod of the convex piston and the liquid channel in the convex piston column, so that the concave piston is also pushed to displace downwards;
(3) And (5) continuously injecting liquid and pressurizing until reaching the self-balancing static test pile test termination condition required by the design requirement or the detection specification.
2. A compound piston jack for a load box as claimed in claim 1 wherein: the bottom of the piston column is contacted with the bottom of the cavity of the concave piston, and when liquid is injected, the pressure of the liquid to the convex piston is transferred to the bottom surface of the concave piston through the piston column, so that the superposition and the compounding of the pressure of the convex piston and the pressure of the concave piston are realized.
3. A compound piston jack for a load box as claimed in claim 1 wherein: the piston plate is detachably connected with the piston post.
4. A compound piston jack for a load box as claimed in claim 3 wherein: the piston rod is characterized by further comprising a hollow connecting rod for connecting the piston plate and the piston column, wherein the outer diameter of the hollow connecting rod is matched with a channel between the piston plate and the piston column, and the hollow connecting rod is hollow and communicated with the channel on the piston column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110157613.6A CN112850544B (en) | 2021-02-05 | 2021-02-05 | Composite piston type jack for load box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110157613.6A CN112850544B (en) | 2021-02-05 | 2021-02-05 | Composite piston type jack for load box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112850544A CN112850544A (en) | 2021-05-28 |
| CN112850544B true CN112850544B (en) | 2024-09-03 |
Family
ID=75988703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110157613.6A Active CN112850544B (en) | 2021-02-05 | 2021-02-05 | Composite piston type jack for load box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112850544B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214359985U (en) * | 2021-02-05 | 2021-10-08 | 江西联保工程咨询有限公司 | Composite piston type jack for load box |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2253160B1 (en) * | 1973-12-03 | 1977-06-24 | Poclain Sa | |
| CN204435439U (en) * | 2015-01-12 | 2015-07-01 | 宋博琪 | A kind of foundation pile static load detects uses Novel self-balanced load box |
| CN209226490U (en) * | 2018-11-29 | 2019-08-09 | 上海同罡建筑工程有限公司 | A kind of continuous jack-up system of building |
| CN111364529A (en) * | 2020-04-29 | 2020-07-03 | 江西联保工程咨询有限公司 | Load box using self-service in-cylinder grouting jack |
| CN212450427U (en) * | 2020-08-18 | 2021-02-02 | 江西联保工程咨询有限公司 | Jack with synchronous self-calibration of hydraulic loading and force application and self-calibration structure thereof |
-
2021
- 2021-02-05 CN CN202110157613.6A patent/CN112850544B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214359985U (en) * | 2021-02-05 | 2021-10-08 | 江西联保工程咨询有限公司 | Composite piston type jack for load box |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112850544A (en) | 2021-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11041385B2 (en) | Mining hydraulic constant-resistance deforming and automatic pressure relieving anchor rod and working method thereof | |
| CN111014416B (en) | Internal and external constraint type pipe liquid filling pressing sealing device | |
| CN104314527B (en) | A kind of oil production method of the hydraulic pumping unit of use power-assisted oil cylinder | |
| CN109047703B (en) | Medium-pressure antigravity casting technology | |
| CN106041503A (en) | Tensioning device for pre-stressing assembly with threaded rod | |
| CN206392667U (en) | A kind of high-pressure forming equipment | |
| CN214359985U (en) | Composite piston type jack for load box | |
| CN112850544B (en) | Composite piston type jack for load box | |
| CN104929574B (en) | Dual-channel different-direction joint-control check valve | |
| CN110270619A (en) | A kind of circular material blank ultrahigh-pressure hydraulic breathing intensifying device | |
| JP2019171398A (en) | Hydraulic press | |
| CN102527812A (en) | Combined mould for pipe free bulging | |
| CN212641534U (en) | Load box using self-service in-cylinder grouting jack | |
| CN212052919U (en) | Hollow single-cylinder jack load box | |
| CN107806458A (en) | A kind of mechanical self-latching tightly locking hydraulic cylinder | |
| CN111364529A (en) | Load box using self-service in-cylinder grouting jack | |
| CN104260296B (en) | A kind of injection machine matched molds apparatus | |
| CN106015157B (en) | Compound carbon fiber oil cylinder | |
| CN118728792A (en) | Oil cylinder structure of forging and extruding composite press | |
| CN220581414U (en) | Sequential telescopic oil cylinder | |
| CN115090854B (en) | Die casting die for processing automobile engine cylinder | |
| CN105089530B (en) | Anti- return of washing well tells control valve gear | |
| CN215717511U (en) | Double-piston unloading sandbox for steel structure support | |
| CN221347372U (en) | Flow guiding wheel structure of flow guiding device | |
| CN211464450U (en) | Internal high-pressure fluid forming equipment and series oil cylinder clamping mechanism thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211129 Address after: 330000 plant 2, No. 918, Huohuo Liu Road, Nanchang high tech Industrial Development Zone, Nanchang City, Jiangxi Province Applicant after: Jiangxi Hongli Precision Manufacturing Co.,Ltd. Applicant after: JIANGXI LIANBAO ENGINEERING CONSULTING Co.,Ltd. Address before: 330000 South 1st floor, digital building, 966 Gaoxin 5th Road, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Applicant before: JIANGXI LIANBAO ENGINEERING CONSULTING Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |