CN-122014711-A - Oil cylinder control valve and scissor type aerial work platform

CN122014711ACN 122014711 ACN122014711 ACN 122014711ACN-122014711-A

Abstract

The invention provides an oil cylinder control valve and a scissor type aerial work platform. The control valve comprises a control valve body, an electromagnetic valve and an emergency manual mechanism, wherein the control valve body is provided with a working connection port and an oil cylinder connection port, the electromagnetic valve is arranged on the control valve body, and the emergency manual mechanism is arranged in parallel with the electromagnetic valve and is independently arranged on one side of the electromagnetic valve along the radial direction of the electromagnetic valve. According to the invention, the emergency manual mechanism is completely separated from the electromagnetic valve in physical structure and is independently arranged on one side of the electromagnetic valve in the radial direction of the electromagnetic valve to form a parallel layout instead of a traditional embedded penetrating structure, so that interference or damage of the emergency manual mechanism to an internal oil way of the electromagnetic valve is avoided, the internal oil way structure of a valve body of the control valve is simplified, the processing technology difficulty and the manufacturing cost are reduced, and meanwhile, the potential leakage channel and clamping stagnation risk caused by penetrating members are eliminated, and the sealing reliability and the action stability of the electromagnetic valve are effectively improved.

Inventors

PENG XIUYING
FENG YIJIANG
CHEN XUECAI
CAO GUANGBING
CHEN WEIZHI
LI JIAWEI
YU LUYING
ZHOU JIAN
CHEN YU

Assignees

浙江高宇液压机电有限公司

Dates

Publication Date: 20260512
Application Date: 20260324

Claims (10)

1. An oil cylinder control valve, characterized by comprising: the control valve body is provided with a working connection port and an oil cylinder connection port; The electromagnetic valve is arranged on the control valve body and is used for responding to the electric signal to act so as to control the on-off or flow direction switching of an oil way between the working connection port and the oil cylinder connection port on the control valve body; The emergency manual mechanism is arranged in parallel with the electromagnetic valve, is independently arranged on one side of the electromagnetic valve along the radial direction of the electromagnetic valve, and is used for manually controlling the on-off of an oil way between the working connection port and the oil cylinder connection port when the electromagnetic valve fails, so that oil liquid at the oil cylinder connection port can flow out from the working connection port.
2. The cylinder control valve according to claim 1, wherein the emergency manual mechanism includes: The emergency valve assembly is provided with a first emergency interface communicated with the working connection port and a second emergency interface communicated with the oil cylinder connection port, an emergency valve hole axially arranged along the emergency valve assembly is formed in the emergency valve assembly, and the first emergency interface and the second emergency interface are communicated with the emergency valve hole; The emergency valve core is arranged in the emergency valve hole in a sliding manner along the axial direction of the emergency valve hole and is used for abutting against or being away from the first emergency interface, so that the emergency valve core correspondingly opens or closes the first emergency interface, and then correspondingly communicates or cuts off the first emergency port and the second emergency port; The emergency pull rod is slidably arranged on the emergency valve assembly in a penetrating mode, a first end in the emergency valve hole is connected with the emergency valve core, a second end outside the emergency valve hole is used as an operation end for receiving manual operation force and used for pulling the emergency valve core to move so that the emergency valve core is far away from the first emergency interface, the first emergency interface is communicated with the emergency valve hole, and the first emergency interface is communicated with the second emergency interface.
3. The cylinder control valve according to claim 2, wherein, An emergency elastic piece is arranged between the emergency valve core and the emergency valve assembly and is used for applying elastic force to the emergency valve core, so that the emergency valve core is abutted to the first emergency interface in a free state, the first emergency interface is closed, the communication between the first emergency interface and the emergency valve hole is cut off, and the first emergency interface and the second emergency interface are cut off.
4. The cylinder control valve according to claim 2, wherein, The first emergency interface is arranged at the axial end part of the emergency valve assembly and is coaxially arranged with the emergency valve hole; The plugging end of the emergency valve core is provided with a plugging structure which is used for being abutted and plugged at the first emergency interface; the follow-up end of emergent case is equipped with the draw-in groove, the first end setting of emergent pull rod is in the draw-in groove is used for pulling emergent case is followed emergent valve hole slides.
5. The cylinder control valve according to claim 2, wherein, The first emergency interface is a damping port and is used for controlling the flow of oil liquid so as to control the descending speed of the aerial working platform.
6. The cylinder control valve according to any one of claims 1 to 5, characterized in that the solenoid valve includes: The electromagnetic valve assembly is provided with a first main interface communicated with the working connection port and a second main interface communicated with the oil cylinder connection port, a main valve hole axially arranged along the electromagnetic valve assembly is arranged in the electromagnetic valve assembly, and the first main interface and the second main interface are communicated with the main valve hole; The main valve comprises a main valve core, a main valve hole, a first connecting hole and a second connecting hole, wherein the main valve core is slidably arranged in the main valve hole along the axial direction of the main valve hole and is used for being abutted and pressed and blocked at the first main interface so as to cut off the communication between the first main interface and the main valve hole and further cut off the communication between the first main interface and the second main interface; When the pilot valve core opens the first connecting hole, oil in the pilot valve hole flows to the first main interface through the first connecting hole to release pressure, so that the main valve core can move under the action of high-pressure oil at the second main interface and open the first main interface, the communication between the first main interface and the second main interface is realized, and the communication between the first main interface and the second main interface is realized.
7. The cylinder control valve according to claim 6, characterized in that, The main valve core is provided with an oil pressure axial force application structure, and the oil pressure axial force application structure is positioned at the second main interface when the main valve core is abutted and contacted with the first main interface, so that the oil pressure of the second main interface can apply acting force far away from the first main interface to the main valve core along the axial direction of the main valve core.
8. The cylinder control valve according to claim 6, characterized in that, A main elastic piece is arranged on one side of the pilot valve core, which is away from the main valve core, and is used for providing elastic force for resetting the pilot valve core and the main valve core; an auxiliary elastic piece is arranged between the main valve core and the pilot valve core and used for providing elastic buffering when the pilot valve core is reset towards the main valve core so as to absorb the impact kinetic energy of the pilot valve core and further limit the impact force of the main valve core on the electromagnetic valve assembly.
9. A scissor aerial platform provided with a cylinder control valve as claimed in any one of claims 1 to 8.
10. The scissor aerial work platform of claim 9, wherein the scissor aerial work platform further comprises: The lifting control valve is used for communicating the lifting working port with the oil inlet or the oil return port, so that when the lifting working port is communicated with the oil inlet, hydraulic oil led in by the oil inlet flows into the lifting working oil cavity sequentially through the lifting working port, the working port and the oil cylinder port to realize lifting action, and when the oil return port is communicated with the lifting working port, the oil cylinder control valve manually or electromagnetically controls the working port and the oil cylinder port, hydraulic oil in the lifting working oil cavity sequentially passes through the oil cylinder port, the working port, the oil return port and the oil return tank to realize descending action.

Description

Oil cylinder control valve and scissor type aerial work platform Technical Field The invention relates to the technical field of hydraulic equipment, in particular to an oil cylinder control valve and a scissor type aerial work platform. Background The scissor type aerial work platform is special aerial work equipment widely applied to the fields of building construction, equipment installation, warehouse logistics and the like, and the scissor type aerial work platform is driven by a hydraulic system to unfold or fold a scissor arm frame so as to realize the vertical lifting of the platform. In a hydraulic system, a descent control valve is a key element for controlling a platform to descend steadily, and is generally installed on a fuel line of a lower cylinder to control on-off of a fluid flow path in the hydraulic system or switch different fluid flow paths. At present, the common lower oil cylinder control valve in the market mostly adopts the design of integrating an electromagnetic valve and a mechanical emergency device. In order to meet the requirements in safety regulations regarding platform descent in emergency situations, such control valve bodies are often integrated with an emergency push button mechanism. Chinese publication No. CN212899200U discloses a cartridge solenoid valve, which includes a control valve body assembly, a valve core assembly, and an electromagnetic driving assembly. The valve core assembly and the electromagnetic driving assembly are accommodated in the inner cavity of the control valve body assembly, and when the coil generates a variable induction magnetic field, the electromagnetic driving assembly can move in the inner cavity of the control valve body assembly and drive the valve core assembly to move. The electromagnetic driving assembly further comprises a pull rod, a second connecting pin and a first elastic piece, wherein the pull rod is movably arranged in the inner cavity, one end of the pull rod is connected with the movable iron and can drive the pilot valve core to move, a third pin groove is formed in one side, relatively far away from the pilot valve core, of the movable iron, the second connecting pin penetrates through the third pin groove, the first elastic piece is arranged in the mounting through hole, one end of the first elastic piece is abutted to the end of the pull rod, and the other end of the first elastic piece is abutted to the second connecting pin. The pull rod partially stretches into the installation through hole, the end part of the pull rod, which stretches into the installation through hole, is provided with a pull rod head, the end part of the installation through hole, which is close to the pull rod, is provided with a shrinkage part, and the inner diameter of the shrinkage part can be used for the pull rod to move in the installation through hole and is smaller than the outer diameter of the pull rod head. Therefore, in the process of pulling the pull rod, the pull rod head can drive the movable iron to move along the direction that the pilot valve core is far away from the main valve core, so that the pilot valve core is separated from the main valve core and is released from abutting against the main valve core. However, in the above technical solution, the emergency button mechanism, i.e. the pull rod, structurally penetrates through the solenoid valve control valve body to realize manual mechanical operation in case of power failure. Because the emergency button mechanism needs to extend from the outside of the control valve body and penetrate through the valve core, the structure of an oil way inside the control valve body is complex, the difficulty of a processing technology is increased, the manufacturing cost is increased, and the risk of hydraulic oil leakage is increased due to the existence of an inner penetrating piece. In addition, the complicated internal structure makes the reliability of solenoid valve reduce, appears jamming or sealing failure's trouble such as easily, influences the stationarity and the control accuracy that the platform descends, and then influences the security performance and the life of complete machine. Disclosure of Invention In view of the above, the invention provides an oil cylinder control valve and a scissor type aerial work platform, and aims to solve the problem that an emergency button mechanism in the existing electromagnetic valve penetrates through a valve body of the electromagnetic valve control valve to cause low reliability of the electromagnetic valve. On one hand, the invention provides an oil cylinder control valve, which comprises a control valve body, an electromagnetic valve and an emergency manual mechanism, wherein the control valve body is provided with a working connection port and an oil cylinder connection port, the electromagnetic valve is arranged on the control valve body and is used for responding to an electric signal to actuate to control the on-off or flow di