CN-224199061-U - Emergency hydraulic control device of hydraulic winch

Abstract

The utility model provides an emergency hydraulic control device of a hydraulic winch, which relates to the technical field of hydraulic winches and comprises an oil pump, an oil pump variable cylinder, an electric proportional valve, a manual pressure reducing valve and an electromagnetic reversing valve, wherein the oil pump variable cylinder is used for adjusting the oil output flow and direction of the oil pump so as to control the hydraulic winch, a control oil port of the oil pump variable cylinder is connected to an oil outlet of the electric proportional valve through an internal oil duct, the oil outlet of the manual pressure reducing valve is connected to control ports at two ends of a valve core of the electric proportional valve, the electromagnetic reversing valve is arranged on an oil inlet loop of the manual pressure reducing valve, when the hydraulic winch operates in a hydraulic emergency control mode, the electromagnetic reversing valve switches pressure oil to the pressure oil port of the manual pressure reducing valve, and the pressure oil output by the manual pressure reducing valve drives the valve core of the electric proportional valve to move, so that the rotating speed and the direction of the hydraulic winch can change along with the change of the output pressure of the manual pressure reducing valve, the performance of the hydraulic winch is consistent with that of the electric proportional control mode, and when the electric control mode fails, the hydraulic winch can still operate stably, rapidly, accurately and reliably.

Inventors

• NING RONGHUI

Assignees

• 咸阳华夏液压机电有限公司

Dates

Publication Date

20260505

Application Date

20250619

Claims (5)

1. 1. The emergency hydraulic control device of the hydraulic winch is characterized by comprising an oil pump (1), an oil pump variable cylinder (2), an electric proportional valve (3), a manual pressure reducing valve (4) and an electromagnetic reversing valve (5): The oil pump (1) is arranged on an oil supply oil path of the hydraulic winch (6), the oil pump variable cylinder (2) is used for adjusting the oil output flow and direction of the oil pump (1) so as to control the hydraulic winch (6), and a control oil port of the oil pump variable cylinder (2) is connected to an oil outlet of the electric proportional valve (3) through an internal oil duct; An oil outlet of the manual pressure reducing valve (4) is connected to control ports at two ends of a valve core of the electric proportional valve (3), and an oil inlet loop of the manual pressure reducing valve (4) is provided with the electromagnetic directional valve (5).
2. 2. The hydraulic winch emergency hydraulic control device according to claim 1, wherein the forward side oil outlet of the manual pressure reducing valve (4) is connected to the forward side spool control port of the electric proportional valve (3), and the backward side oil outlet is connected to the backward side spool control port of the electric proportional valve (3) to drive the hydraulic winch (6) to operate in forward and backward directions respectively through the handle of the manual pressure reducing valve (4).
3. 3. The hydraulic winch emergency hydraulic control according to claim 2, characterized in that the pushing angle of the handle is positively correlated with the rotational speed of the hydraulic winch (6).
4. 4. The hydraulic winch emergency hydraulic control device according to claim 2, characterized in that when the handle is in the neutral position, the spool of the electro proportional valve (3) is reset to the neutral position, and the hydraulic winch (6) is stopped.
5. 5. The hydraulic winch emergency hydraulic control device according to claim 1, characterized in that the electromagnetic directional valve (5) is a two-position three-way directional valve, the two-position three-way directional valve comprises an initial position and a hydraulic control position, the two-position three-way directional valve is electrified to be in the initial position, pressure oil is not communicated, the two-position three-way directional valve is in the hydraulic control position, and the pressure oil is communicated to the manual pressure reducing valve (4).

Description

Emergency hydraulic control device of hydraulic winch Technical Field The utility model relates to the technical field of hydraulic winches, in particular to an emergency hydraulic control device of a hydraulic winch. Background The electric proportional control hydraulic winch has wide application in logging hydraulic winch, well testing hydraulic winch, towing sled and continuous oil pipe vehicle (sled) due to own advantages, and has strict requirements on reliability due to petroleum industry. Although the electric proportion control mode has a plurality of advantages, the electric control part is complex in structure and easy to fail, and the requirements of important occasions on reliability are difficult to meet in use. The solution to this problem is to add a set of emergent hydraulic control device on the basis of current electric proportional control, as shown in fig. 1 which is a schematic diagram of the principle of the winch emergent hydraulic control device, when the electric proportional control system breaks down, it decides to convey the control oil to the variable cylinder of the oil pump together by means of the manual pressure reducing valve and the switching valve group, and pushes the variable cylinder of the oil pump to act, and then the oil pump outputs hydraulic oil to drive the hydraulic winch to operate, thereby effectively avoiding serious consequences possibly caused by the breakdown of the electric proportional control system. However, the emergency hydraulic control device has the problem of complex oil circuit, and because the oil pump is limited by the structural principle of the oil pump, the oil pump cannot operate at the maximum displacement like an electric control under the emergency hydraulic control state, the operation speed of the hydraulic winch is slower, and the operation working condition of the hydraulic winch is difficult to control rapidly, accurately and effectively. Disclosure of utility model The utility model aims to solve the problems in the prior art and provide an emergency hydraulic control device for a hydraulic winch, which can realize the function of controlling the hydraulic winch in an electric proportion in an emergency state. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: The utility model provides an emergency hydraulic control device of a hydraulic winch, which comprises an oil pump, an oil pump variable cylinder, an electric proportional valve, a manual pressure reducing valve and an electromagnetic reversing valve, wherein the oil pump variable cylinder is arranged on the oil pump variable cylinder: The oil pump is arranged on an oil supply oil path of the hydraulic winch, the variable oil pump cylinder is used for adjusting the oil output flow and direction of the oil pump so as to control the hydraulic winch, and a control oil port of the variable oil pump cylinder is connected to an oil outlet of the electric proportional valve through an internal oil duct; the oil outlet of the manual pressure reducing valve is connected to the control ports at two ends of the valve core of the electric proportional valve, and an electromagnetic reversing valve is arranged on the oil inlet loop of the manual pressure reducing valve. Optionally, the oil outlet on the forward side of the manual pressure reducing valve is connected to the valve core control port on the forward side of the electric proportional valve, and the oil outlet on the backward side is connected to the valve core control port on the backward side of the electric proportional valve, so that the hydraulic winch is driven to operate in the forward direction and the backward direction respectively through the handle of the manual pressure reducing valve. Alternatively, the pushing angle of the handle is positively correlated with the rotational speed of the hydraulic winch. Optionally, when the handle is at the middle position, the valve core of the electric proportional valve is reset to the middle position, and the hydraulic winch stops running. Optionally, the electromagnetic directional valve is a two-position three-way directional valve, the two-position three-way directional valve comprises an initial position and a hydraulic control position, the two-position three-way directional valve is electrified and positioned at the initial position, pressure oil is not electrified, the two-position three-way directional valve is powered off and positioned at the hydraulic control position, and the pressure oil is communicated to the manual pressure reducing valve. The emergency hydraulic control device of the hydraulic winch has the following beneficial effects: 1) When the hydraulic winch operates in the hydraulic control emergency control mode, an operator can conveniently and quickly control the action of the variable cylinder of the oil pump by directly adjusting the valve core of the electric proportional valve through the manua