CN211116868U - Pile pressing machine hydraulic system capable of preventing misoperation - Google Patents
Pile pressing machine hydraulic system capable of preventing misoperation Download PDFInfo
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- CN211116868U CN211116868U CN201922407441.4U CN201922407441U CN211116868U CN 211116868 U CN211116868 U CN 211116868U CN 201922407441 U CN201922407441 U CN 201922407441U CN 211116868 U CN211116868 U CN 211116868U
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- 239000003921 oil Substances 0.000 abstract description 49
- 230000006378 damage Effects 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 abstract description 6
- 239000010720 hydraulic oil Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model provides a can prevent pile driver hydraulic system of maloperation, including the landing leg pneumatic cylinder, the stop valve, the balanced valve, operating valve and sequence valve, the hydraulic fluid port an of operating valve passes through oil circuit A intercommunication with the big chamber of landing leg pneumatic cylinder, the hydraulic fluid port B of operating valve passes through oil circuit B intercommunication with the loculus of landing leg pneumatic cylinder, the stop valve sets up on oil circuit B, the balanced valve sets up on oil circuit A, the control hydraulic fluid port k of balanced valve communicates with the loculus of landing leg pneumatic cylinder, the oil inlet of sequence valve is connected to on the oil circuit B between stop valve and the landing leg pneumatic cylinder, the oil-out of sequence valve is connected to on the oil circuit B between stop valve and the operating valve. After the pile driver is transferred or other reasons forget to open the stop valve, can make loculus pressure increase, to the set pressure back of sequence valve, the sequence valve can be opened, and hydraulic oil flows back the oil tank from the loculus to prevent to damage because of the pneumatic cylinder that the maloperation arouses, and the sequence valve does not have the influence to the normal work of system, simple and practical.
Description
Technical Field
The utility model relates to a pile press machine hydraulic control system, especially a can prevent pile press machine hydraulic system of maloperation.
Background
The pile press is a large-scale piling mechanical device, the maximum model of the current market is 1200 tons, and the weight is about 300 tons after the counterweight is removed, so that most of the pile presses are used in the replacement of construction sites. The entire machine needs to be disassembled into parts for transportation. In the process, the disassembly, assembly and transportation of the hydraulic cylinder are a key step, and on one hand, the hydraulic cylinder is a relatively precise part and is easy to damage. On the other hand, certain potential safety hazards exist in the process of disassembling and assembling the hydraulic cylinder, and personnel injury is possibly caused. In order to prevent the transportation from being ultrahigh, the piston rod of the hydraulic cylinder of the supporting leg can be contracted before the pile pressing machine is lifted, and then the hydraulic cylinder is disassembled.
The principle of the hydraulic cylinder and the valve block of the landing leg of the existing pile pressing machine is shown in figure 1: including a balancing valve 15 and a shut-off valve 14. The balance valve has the advantages that the weight of the machine body is supported by the supporting legs, when the piston rod 13 of the hydraulic cylinder contracts, the machine body descends, certain pressure is kept in the large cavity of the supporting leg hydraulic cylinder 11 in the descending process of the machine body so as to support the machine body, and the balance valve is used for preventing the damage to the supporting leg hydraulic cylinder due to the overlarge load of the machine body. The function of stop valve is the effect of closing the landing leg pneumatic cylinder loculus in the transportation, and under pile driver normal operating condition, the stop valve is in the open mode. When the pile driver needs to be transferred, the hydraulic cylinder needs to be detached, before the hydraulic cylinder is detached, in order to protect a piston rod of the hydraulic cylinder from being damaged, and in order to reduce the transportation size of the hydraulic cylinder as much as possible, the small cavity of the hydraulic cylinder needs to be fed with oil through the operating valve 12, and the large cavity of the hydraulic cylinder returns oil. And when the piston rod of the hydraulic cylinder is completely retracted into the cylinder barrel of the hydraulic cylinder, the stop valve is closed. So that the hydraulic oil in the small cavity of the hydraulic cylinder is sealed in the small cavity of the hydraulic cylinder. Even if the hydraulic cylinder is acted by external force (or gravity), the piston rod of the hydraulic cylinder cannot fall out. The piston rod can be protected, and the piston rod is prevented from falling accidentally to hurt people in the hoisting process.
However, after the pile driver is transferred to the next construction site and the installation is completed, because the stop valve is in a closed state, in the debugging process, the situation that the stop valve 14 is forgotten to be opened often occurs, in this situation, when the operation valve 12 is operated, the large cavity is fed with oil, and because the small cavity is closed by the stop valve, the pressure of the large cavity and the small cavity is in inverse proportion to the area of the large cavity and the small cavity. The rated pressure of a landing leg oil cylinder of a general pile pressing machine is 30Mpa, the area ratio of large and small cavities of a hydraulic cylinder is about 2:1, the pressure of the small cavity can reach about 60Mpa at the moment, the pressure far exceeds the rated pressure, the hydraulic cylinder is easy to damage, and unnecessary loss is caused, so a scheme is needed in the prior art to solve the problem of hydraulic cylinder damage caused by misoperation of forgetting to close a stop valve.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can prevent pressing stake machine hydraulic system of maloperation to solve the problem that provides in the background art.
The utility model provides a can prevent pile driver hydraulic system of maloperation, includes landing leg pneumatic cylinder, stop valve, balanced valve, operating valve and sequence valve, the hydraulic fluid port a of operating valve with the big chamber of landing leg pneumatic cylinder passes through oil circuit A intercommunication, the hydraulic fluid port B of operating valve with the loculus of landing leg pneumatic cylinder passes through oil circuit B intercommunication, the stop valve sets up on oil circuit B, balanced valve sets up on oil circuit A, and the control hydraulic fluid port k of balanced valve communicates with the loculus of landing leg pneumatic cylinder, the oil inlet of sequence valve is connected to on the oil circuit B between stop valve and the landing leg pneumatic cylinder, and the oil-out of sequence valve is connected to on the oil circuit B between stop valve and the operating valve.
Further, the set pressure of the sequence valve is set to be equal to the system working pressure of the support leg hydraulic cylinder.
Preferably, the operating valve is a three-position four-way reversing valve with a Y-shaped middle position function, and when the reversing valve is positioned at the middle position, the oil port a and the oil port b are both communicated with the oil tank.
The utility model discloses following beneficial effect has at least:
a hydraulic system of pile driver for preventing misoperation is prepared as setting sequence valve on current support hydraulic cylinder valve set, connecting oil inlet of sequence valve to small cavity of support hydraulic cylinder directly, connecting oil outlet of sequence valve to large cavity of support hydraulic cylinder or connecting oil tank through operation valve, opening check valve after pile driver is transferred or for other reasons to increase pressure of small cavity, opening sequence valve to let hydraulic oil flow back to tank from small cavity for preventing hydraulic cylinder from being damaged, opening support hydraulic cylinder when hydraulic oil flows back to tank from small cavity, finding out by operator in time and opening check valve, opening check valve to let support hydraulic cylinder restore normal work after check valve is opened, ensuring normal oil pressure in lower cavity when piston rod is retracted when oil is fed and lower cavity is returned, the system has no influence on the normal work of the system, has simple structure and is very practical.
In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
FIG. 1 is a schematic diagram of a hydraulic cylinder and a valve block of a leg of a conventional pile press;
fig. 2 is a schematic diagram of a hydraulic system of a pile driver according to a third preferred embodiment of the present invention, which can prevent misoperation.
In fig. 1: 11-supporting leg hydraulic cylinder, 12-operating valve, 13-piston rod, 14-stop valve and 15-balance valve.
In fig. 2: 21-supporting leg hydraulic cylinder, 22-stop valve, 23-balance valve, 24-operation valve, 25-sequence valve and 26-piston rod.
Detailed Description
The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.
Referring to fig. 2, the hydraulic system of the pile driver capable of preventing misoperation comprises a support leg hydraulic cylinder 21, a stop valve 22, a balance valve 23, an operation valve 24 and a sequence valve 25, wherein an oil port a of the operation valve is communicated with a large cavity of the support leg hydraulic cylinder through an oil path a, an oil port B of the operation valve is communicated with a small cavity of the support leg hydraulic cylinder through an oil path B, the stop valve is arranged on the oil path B, the balance valve is arranged on the oil path a, a control oil port k of the balance valve is communicated with the small cavity of the support leg hydraulic cylinder, when the control oil port k has pressure oil, the balance valve is opened, an oil inlet of the sequence valve is connected to the oil path B between the stop valve and the support leg hydraulic cylinder, and an oil outlet of the sequence valve is.
In this embodiment, the operation valve 24 is a three-position four-way reversing valve with a Y-shaped middle position function, and when the reversing valve is located at the middle position, the oil port a and the oil port b are both communicated with the oil tank.
Can prevent maloperation's pile driver hydraulic system's working process and principle roughly as follows:
after the pile press finishes working in one field, the operating valve 24 is moved to the left position, the piston rods 26 of the four supporting leg hydraulic cylinders are retracted, the small cavities of the supporting leg hydraulic cylinders are filled with oil, the large cavities are filled with oil, a certain support is provided for the machine body through the back pressure action of the balance valve 23, the stop valve 22 is closed, and then the supporting leg hydraulic cylinders are detached.
After the pile pressing machine is transferred to a new field, the landing leg hydraulic cylinder is remounted to the lower part of the machine body, a hydraulic pipeline is connected, the operating valve 24 is moved to the right position, the large cavity of the landing leg hydraulic cylinder is filled with oil, if the stop valve 22 is forgotten to be opened, the small cavity can not return oil normally, when the oil pressure of the small cavity reaches the set pressure of the sequence valve 25, the sequence valve is opened, the oil in the small cavity flows back to the oil tank through the sequence valve, the piston rod of the landing leg hydraulic cylinder does not act at the moment, and an operator can also find out.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The pile driver hydraulic system capable of preventing misoperation is characterized by comprising a supporting leg hydraulic cylinder (21), a stop valve (22), a balance valve (23), an operating valve (24) and a sequence valve (25), wherein an oil port a of the operating valve is communicated with a large cavity of the supporting leg hydraulic cylinder through an oil way A, an oil port B of the operating valve is communicated with a small cavity of the supporting leg hydraulic cylinder through an oil way B, the stop valve is arranged on the oil way B, the balance valve is arranged on the oil way A, a control oil port k of the balance valve is communicated with the small cavity of the supporting leg hydraulic cylinder, an oil inlet of the sequence valve is connected to the oil way B between the stop valve and the supporting leg hydraulic cylinder, and an oil outlet of the sequence valve is connected to the oil way B between the stop valve.
2. A mis-operation preventing hydraulic system for a pile driver as claimed in claim 1, wherein the set pressure of the sequence valve is set to be equal to the system working pressure of the hydraulic cylinder of the support leg.
3. The hydraulic system of a pile driver capable of preventing misoperation according to claim 1, wherein the operation valve is a three-position four-way reversing valve with a Y-shaped middle position function, and when the reversing valve is located at the middle position, the oil port a and the oil port b are both communicated with an oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922407441.4U CN211116868U (en) | 2019-12-27 | 2019-12-27 | Pile pressing machine hydraulic system capable of preventing misoperation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922407441.4U CN211116868U (en) | 2019-12-27 | 2019-12-27 | Pile pressing machine hydraulic system capable of preventing misoperation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211116868U true CN211116868U (en) | 2020-07-28 |
Family
ID=71707334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922407441.4U Active CN211116868U (en) | 2019-12-27 | 2019-12-27 | Pile pressing machine hydraulic system capable of preventing misoperation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211116868U (en) |
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2019
- 2019-12-27 CN CN201922407441.4U patent/CN211116868U/en active Active
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