CN111963509A - Pressure relief system of pilot oil of oscillating cylinder hydraulic control valve - Google Patents
Pressure relief system of pilot oil of oscillating cylinder hydraulic control valve Download PDFInfo
- Publication number
- CN111963509A CN111963509A CN202010866074.9A CN202010866074A CN111963509A CN 111963509 A CN111963509 A CN 111963509A CN 202010866074 A CN202010866074 A CN 202010866074A CN 111963509 A CN111963509 A CN 111963509A
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- Prior art keywords
- oil
- valve
- cylinder hydraulic
- pumping
- hydraulic valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to the technical field of hydraulic pressure, in particular to a pressure relief system of pilot oil of a tilt cylinder hydraulic control valve, which comprises two swing oil cylinders, a tilt cylinder hydraulic valve, two pumping oil cylinders and a pumping oil cylinder hydraulic valve, wherein a first check valve is arranged between an oil outlet A1 of the pumping oil cylinder hydraulic valve and a pilot oil port a2 of the tilt cylinder hydraulic valve, an inlet of the first check valve is simultaneously connected with a pilot oil port a2 of the tilt cylinder hydraulic valve and a pumping oil cylinder signal port S1, an outlet of the first check valve is connected with an oil outlet A1 of the pumping oil cylinder hydraulic valve, a second check valve is arranged between an oil outlet B1 of the pumping oil cylinder hydraulic valve and a pilot oil port B2 of the tilt cylinder hydraulic valve, an inlet of the second check valve is simultaneously connected with a pilot oil port B2 of the tilt cylinder hydraulic valve and a pumping oil cylinder. The system provided by the invention has the advantages of simple structure and low cost, and can realize the pressure relief problem of pilot oil by utilizing the pressure difference, thereby achieving the purpose of quickly putting the cylinder in place.
Description
Technical Field
The invention relates to the technical field of hydraulic pressure, in particular to a pressure relief system for pilot oil of a tilt cylinder hydraulic control valve.
Background
In the working process of the automatic pumping system, each action process of the tilt cylinder needs to be quickly in place, so that the S valve in the hopper is in seamless butt joint with the concrete cylinder. In order to achieve the purpose, an energy accumulator is often arranged in a hydraulic system to assist in completing the cylinder tilting action, but the exertion of the energy accumulator capacity is realized under the condition that a valve core of a cylinder tilting reversing valve is quickly reversed in place. At present, a large-displacement pumping system is applied to a hydraulic control valve, and when one side of the hydraulic control valve receives a transmitted high-pressure pilot oil signal, how to quickly release the pressure of pilot oil on the other side is very important. A design method for arranging the damping hole for pressure relief is provided, but the pressure relief mode of the damping hole can lead to the pressure relief delay, and the pumping efficiency is influenced. The invention discloses a new way and develops a system for quickly relieving pressure of pilot oil.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pressure relief system of pilot oil of a cylinder tilting hydraulic control valve, which has a simple structure and low cost, can realize the pressure relief problem of the pilot oil by utilizing pressure difference and quickly achieve the in-place of a cylinder tilting.
The invention is realized by the following technical scheme:
a pressure relief system for pilot oil of a tilt cylinder hydraulic control valve comprises two swing oil cylinders, a tilt cylinder hydraulic valve, two pumping oil cylinders and a pumping oil cylinder hydraulic valve, wherein two oil outlets A1 and B1 of the pumping oil cylinder hydraulic valve are respectively communicated with oil inlets of the two pumping oil cylinders, return oil of the two swing oil cylinders is respectively communicated with two oil return ports a1 and B1 of the pumping oil cylinder hydraulic valve through oil return pipelines, signal ports S1 and S2 of the two pumping oil cylinders are respectively communicated with two pilot oil ports a2 and B2 of the tilt cylinder hydraulic valve, a first one-way valve is arranged between an oil outlet 539A 7 of the pumping oil cylinder hydraulic valve and a pilot oil port a2 of the tilt cylinder hydraulic valve, an inlet of the first one-way valve is simultaneously connected with a2 of the tilt cylinder hydraulic valve and a1 of the pumping oil cylinder, an outlet of the first one-way valve is connected with an oil outlet A1 of the pumping oil cylinder hydraulic valve, a second one-way valve is arranged between an oil outlet, and the inlet of the second one-way valve is simultaneously connected with the pilot oil port B2 of the tilt cylinder hydraulic valve and the signal port S2 of the pumping cylinder, and the outlet of the second one-way valve is connected with the oil outlet B1 of the hydraulic valve of the pumping cylinder.
Advantageous effects of the invention
The invention provides a pressure relief system for pilot oil of a tilt cylinder hydraulic control valve, which has the following characteristics:
1. the check valve is skillfully arranged, the pressure relief problem of pilot oil of the hydraulic control valve is realized by utilizing the pressure difference, and the problem that the valve can not be quickly placed in place is easily solved by many people;
2. the one-way valve is a general product in the market and has sufficient goods source;
3. the problem of difficulty is solved with low cost.
Drawings
FIG. 1 is a schematic diagram of the system architecture of the present invention;
in the figure: 1. the hydraulic system comprises a first check valve, a second check valve, a cylinder swinging hydraulic valve, a pumping oil cylinder 5 and a swinging oil cylinder 6.
Detailed Description
A pressure relief system for pilot oil of a tilt cylinder hydraulic control valve comprises two swing oil cylinders 6, a tilt cylinder hydraulic valve 3, two pumping oil cylinders 5 and a pumping oil cylinder hydraulic valve 4, wherein two oil outlets A1 and B1 of the pumping oil cylinder hydraulic valve are respectively communicated with oil inlets of the two pumping oil cylinders, return oil of the two swing oil cylinders is respectively communicated with two oil return ports a1 and B1 of a pumping oil cylinder hydraulic valve through an oil return pipeline, signal ports S1 and S2 of the two pumping oil cylinders are respectively communicated with two pilot oil ports a2 and B2 of the tilt cylinder hydraulic valve, a first check valve 1 is arranged between an oil outlet A1 of the pumping oil cylinder hydraulic valve and a pilot oil port a2 of the tilt cylinder hydraulic valve, an inlet of the first check valve is simultaneously connected with a2 of the tilt cylinder hydraulic valve and a signal port S1 of the pumping oil cylinder, an outlet of the first check valve is connected with an oil outlet A1 of the pumping oil cylinder hydraulic valve, a second check valve 2 is arranged between an oil outlet B1 of, and the inlet of the second one-way valve is simultaneously connected with the pilot oil port B2 of the tilt cylinder hydraulic valve and the signal port S2 of the pumping cylinder, and the outlet of the second one-way valve is connected with the oil outlet B1 of the hydraulic valve of the pumping cylinder.
The working principle of the invention is as follows: when high-pressure oil is discharged from the port A1, a pumping oil cylinder in-place signal S1 is transmitted to a pilot oil port a2 of the tilt cylinder hydraulic valve, at the moment, the first one-way valve is closed due to pressure difference between two sides, the second one-way valve is opened by the pilot oil at the end B2 of the tilt cylinder hydraulic valve, and the pressure is communicated with the port T through a port B1 of the pumping oil cylinder hydraulic valve for pressure relief. The swing cylinder hydraulic valve finishes reversing action under the action of pilot oil at the port a2, the left swing cylinder rapidly moves to the right, the outlet A2 of the swing cylinder hydraulic valve transmits a stroke position signal to the port B1 of the hydraulic valve of the pumping cylinder, the hydraulic valve of the pumping cylinder reverses, high-pressure oil is discharged from the port B1, the position signal S2 of the pumping cylinder can be transmitted to the pilot oil port B2 of the swing cylinder hydraulic valve, at the moment, the second one-way valve is closed due to pressure difference between two sides, the first one-way valve is opened by the pilot oil at the port a2 of the swing cylinder hydraulic valve, and the pressure is released through the port A1 of the hydraulic valve of the pumping cylinder and the port T. The cylinder-swinging hydraulic valve finishes reversing action under the action of pilot oil at a port B2, the right swing cylinder rapidly moves in place, an outlet B2 of the cylinder-swinging hydraulic valve transmits a stroke-in-place signal to a port a1 of a hydraulic valve of a pumping oil cylinder, the hydraulic valve of the pumping oil cylinder reverses, and high-pressure oil is discharged from an outlet A1. This completes a cycle and then repeats.
Two check valves are arranged between oil outlets A1 and B1 of a hydraulic valve of a pumping oil cylinder and pilot oil ports a2 and B2 of a tilt cylinder hydraulic valve, an inlet of each check valve is simultaneously connected with a certain pilot oil port of the tilt cylinder hydraulic valve and a certain logic signal port of the pumping oil cylinder, and an outlet of each check valve is respectively connected with oil outlets A1 and B1 of the hydraulic valve of the pumping oil cylinder. Therefore, one check valve separates high-pressure oil of the pumping oil cylinder from in-place signal oil of the pumping oil cylinder, the signal oil reaches a pilot port at one end of a hydraulic valve of the tilt cylinder, and pilot oil pressure at the other end of the hydraulic valve of the tilt cylinder is relieved through an oil return port of a valve core of a hydraulic control valve of the pumping oil cylinder by the other check valve, so that the hydraulic control valve of the tilt cylinder rapidly completes automatic reversing action, and the in-place signal oil of the reversing is automatically transmitted to the hydraulic control valve of the pumping oil. The pressure relief device has the advantages of simple structure, ingenious design and low cost, and can realize the pressure relief of pilot oil by utilizing the pressure difference to quickly put the tilt cylinder in place.
In conclusion, the pressure relief system for pilot oil of the cylinder-tilting hydraulic control valve has the advantages of simple structure and low cost, and can realize the pressure relief problem of the pilot oil by utilizing the pressure difference, thereby achieving the purpose of quickly achieving the in-place position of the cylinder tilting.
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 (1)
1. A pressure relief system for pilot oil of a tilt cylinder hydraulic control valve is characterized by comprising two swing oil cylinders, a tilt cylinder hydraulic valve, two pumping oil cylinders and a pumping oil cylinder hydraulic valve, wherein two oil outlets A1 and B1 of the pumping oil cylinder hydraulic valve are respectively communicated with oil inlets of the two pumping oil cylinders, return oil of the two swing oil cylinders is respectively communicated with two oil return ports a1 and B1 of the pumping oil cylinder hydraulic valve through oil return pipelines, signal ports S1 and S2 of the two pumping oil cylinders are respectively communicated with two pilot oil ports a2 and B2 of the tilt cylinder hydraulic valve, a first one-way valve is arranged between an oil outlet A1 of the pumping oil cylinder hydraulic valve and a pilot oil port a2 of the tilt cylinder hydraulic valve, an inlet of the first one-way valve is simultaneously connected with a2 of the tilt cylinder hydraulic valve and a signal port S1 of the pumping oil cylinder, an outlet of the first one-way valve is connected with an oil outlet A1 of the pumping oil cylinder hydraulic valve, a second one-way valve is arranged between, and the inlet of the second one-way valve is simultaneously connected with the pilot oil port B2 of the tilt cylinder hydraulic valve and the signal port S2 of the pumping cylinder, and the outlet of the second one-way valve is connected with the oil outlet B1 of the hydraulic valve of the pumping cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010866074.9A CN111963509A (en) | 2020-08-25 | 2020-08-25 | Pressure relief system of pilot oil of oscillating cylinder hydraulic control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010866074.9A CN111963509A (en) | 2020-08-25 | 2020-08-25 | Pressure relief system of pilot oil of oscillating cylinder hydraulic control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111963509A true CN111963509A (en) | 2020-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010866074.9A Pending CN111963509A (en) | 2020-08-25 | 2020-08-25 | Pressure relief system of pilot oil of oscillating cylinder hydraulic control valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN111963509A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2627242Y (en) * | 2003-05-23 | 2004-07-21 | 长沙中联重工科技发展股份有限公司 | Concrete pump electrohydraulic logic control device |
| CN101865189A (en) * | 2010-04-01 | 2010-10-20 | 秦月明 | Electro-hydraulic control system for concrete or coal slime conveying device and method for controlling system |
| CN102213201A (en) * | 2011-05-27 | 2011-10-12 | 秦月明 | High-efficiency concrete or coal slurry conveying system, control method thereof, and two-position three-way hydraulically-controlled directional control valve applied to high-efficiency concrete or coal slurry conveying system |
| CN102588365A (en) * | 2012-03-13 | 2012-07-18 | 徐州重型机械有限公司 | Double-cylinder synchronous control hydraulic system and engineering machinery |
| CN104088839A (en) * | 2014-05-26 | 2014-10-08 | 飞翼股份有限公司 | Differential pressure transmitting device, closed type hydraulic system and mining clearing machine |
| CN104329306A (en) * | 2014-10-31 | 2015-02-04 | 徐州徐工施维英机械有限公司 | Hydraulic control system and method as well as pump |
| DE102014214977A1 (en) * | 2014-07-30 | 2016-02-04 | Siemens Aktiengesellschaft | Hydraulic actuator and method for operating a hydraulic actuator |
| CN110966266A (en) * | 2019-12-30 | 2020-04-07 | 青岛九合重工机械有限公司 | Novel single-pump hydraulic control pumping system |
| CN210978073U (en) * | 2019-10-30 | 2020-07-10 | 青岛九合重工机械有限公司 | Novel boom pump truck pumping hydraulic system |
-
2020
- 2020-08-25 CN CN202010866074.9A patent/CN111963509A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2627242Y (en) * | 2003-05-23 | 2004-07-21 | 长沙中联重工科技发展股份有限公司 | Concrete pump electrohydraulic logic control device |
| CN101865189A (en) * | 2010-04-01 | 2010-10-20 | 秦月明 | Electro-hydraulic control system for concrete or coal slime conveying device and method for controlling system |
| CN102213201A (en) * | 2011-05-27 | 2011-10-12 | 秦月明 | High-efficiency concrete or coal slurry conveying system, control method thereof, and two-position three-way hydraulically-controlled directional control valve applied to high-efficiency concrete or coal slurry conveying system |
| CN102588365A (en) * | 2012-03-13 | 2012-07-18 | 徐州重型机械有限公司 | Double-cylinder synchronous control hydraulic system and engineering machinery |
| CN104088839A (en) * | 2014-05-26 | 2014-10-08 | 飞翼股份有限公司 | Differential pressure transmitting device, closed type hydraulic system and mining clearing machine |
| DE102014214977A1 (en) * | 2014-07-30 | 2016-02-04 | Siemens Aktiengesellschaft | Hydraulic actuator and method for operating a hydraulic actuator |
| CN106536943A (en) * | 2014-07-30 | 2017-03-22 | 西门子公司 | Hydraulic actuator and method for operating a hydraulic actuator |
| CN104329306A (en) * | 2014-10-31 | 2015-02-04 | 徐州徐工施维英机械有限公司 | Hydraulic control system and method as well as pump |
| CN210978073U (en) * | 2019-10-30 | 2020-07-10 | 青岛九合重工机械有限公司 | Novel boom pump truck pumping hydraulic system |
| CN110966266A (en) * | 2019-12-30 | 2020-04-07 | 青岛九合重工机械有限公司 | Novel single-pump hydraulic control pumping system |
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Application publication date: 20201120 |
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| RJ01 | Rejection of invention patent application after publication |