CN217867901U - Electro-hydraulic jacking device with hovering function - Google Patents

Abstract

An electro-hydraulic jacking device with a hovering function comprises an oil cylinder, a piston rod and a hand-pushed hydraulic station trolley, and is characterized in that a balance valve group is mounted on a rib plate on the outer wall of the oil cylinder, the balance valve group is communicated with a rodless cavity of the oil cylinder through a right-angle combined joint and is connected with an oil seat of a rod cavity of the oil cylinder through a control oil circuit joint, and the oil seat of the rod cavity is welded on the outer wall of the oil cylinder and is communicated with a rod oil cavity of the oil cylinder; the front part of the piston rod is provided with threads, and the bearing nut is arranged on the threads of the piston rod and can move up and down through the threads; the head of the piston rod is processed into a convex sphere, the convex sphere is connected with the concave sphere at the lower part of the T-shaped seat through the split clamping plate and the convex sphere at the end part of the piston rod, and the T-shaped seat is used for bearing load and can adapt to the deflection angle of the load. The utility model discloses an electricity liquid jacking device with function of hovering has compact structure, removes characteristics such as convenient, jacking function is efficient, can realize unloaded ejecting fast, and the low-speed is ejecting during the loading to reliably keep the load to rise to hover for a long time after.

Description

Electro-hydraulic jacking device with hovering function

Technical Field

The utility model relates to an electricity liquid jacking device with function of hovering.

Background

Along with the characteristics that wind-powered electricity generation tower machine installation, bridge installation require fastly, have higher requirement to the reliability and the security of hydraulic pressure jacking system, especially installation operating mode characteristics a bit, one of them: the micro-height adjustment is carried out after the load is lifted to a certain height; the second step is as follows: the load needs to remain in this position for a long time after it has risen. Therefore, the hydraulic system is required to have the double-speed characteristic, not only can the idle load be kept for quick ejection, but also the slow jacking speed and even creep can be ensured when the micro-height adjustment is carried out; in addition, after the height is accurately adjusted, the hydraulic support needs to be switched into the mechanical support, so that the whole support system is safer and more reliable.

In recent years, tower cranes are beginning to enter the field of wind turbine installation, which is specially designed for the characteristics of the wind turbine installation industry. Because wind farm owners generally require 3-5 days to complete the installation operation of one fan, the wind power special tower crane is required to be convenient for frequent installation and disassembly. Therefore, the wind power special tower crane adopts 4 jacking oil cylinder assemblies as the foundation for supporting the tower crane, the whole weight of the tower crane acts on the 4 jacking oil cylinders, the extension and contraction quantity of each jacking oil cylinder can be independently adjusted through electro-hydraulic control, the height of the supporting point of the 4 tower crane from the ground is finely adjusted, and the whole tower crane is ensured to meet the requirement of work balance.

Because the tower crane needs to be supported by the jacking oil cylinder for a long time, the supporting mode has two main defects, one is that: because the jacking oil cylinder and the hydraulic valve have certain leakage, 4 oil cylinders can retract to different degrees due to long-time oil pressure support, and finally the work balance of the tower crane is invalid; the second step is as follows: because round the clock alternate the production environmental temperature difference, can make 4 inside supporting oil pressure of jacking hydro-cylinder change differently, finally make the work balance of tower machine inefficacy. Therefore, after the height adjustment work of 4 jacking oil cylinders of the tower crane is completed, and the whole tower crane meets the requirement of work balance, how to convert the hydraulic support of the tower crane into another mechanical support makes the whole support system safer and more reliable, and is the problem to be solved at present.

Disclosure of Invention

The utility model aims at providing a can realize unloaded quick ejecting, the low-speed is ejecting during the loading to reliably keep the load to play to rise the long-time electro-hydraulic jacking device that has the function of hovering who hovers back.

The utility model discloses an electricity liquid jacking device with function of hovering, including hydro-cylinder, piston rod, hand push hydraulic pressure station dolly, the hand push hydraulic pressure station dolly is equipped with the fixed-grade variable pump in the dolly, its characterized in that, installs the balanced valves on the gusset of hydro-cylinder outer wall, the balanced valves has the pole chamber to communicate with the oil cylinder through the right angle combination joint, has the pole chamber oil seat to meet with the hydro-cylinder through controlling the oil circuit joint, there is the pole chamber oil seat welding on the hydro-cylinder outer wall, has the pole oil chamber to communicate with the hydro-cylinder; the front part of the piston rod is provided with threads, and the bearing nut is arranged on the threads of the piston rod and can move up and down through the threads; the head of the piston rod is processed into a convex sphere, the convex sphere is connected with the concave sphere at the lower part of the T-shaped seat through a split clamping plate and the convex sphere at the end part of the piston rod, and the T-shaped seat is used for bearing load and can adapt to the deflection angle of the load.

The utility model discloses an electricity liquid jacking device theory of operation with function of hovering is, by a hand push hydraulic pressure station dolly when the site operation, disposes jacking cylinder assembly at a plurality of branch load points to be respectively to every branch load point's jacking cylinder carry out the jacking, hover the operation, accomplish the installation of whole tower machine or bridge. In order to improve the jacking operation efficiency, a fixed-grade variable oil pump is configured in a hydraulic station to provide hydraulic power, oil pressure firstly enters a balance valve group and enters a rodless cavity of an oil cylinder through a balance valve oil inlet and a right-angle combined joint, so that a piston rod of the oil cylinder starts to eject, if no load exists, the piston rod can be ejected at a high speed, a bearing nut on a lead screw of the piston rod and a T-shaped seat also move upwards together, and after the T-shaped seat contacts the load, the oil cylinder can be rapidly changed into slow-speed ejection. When the piston rod of the oil cylinder reaches the required ejection height, the hydraulic station stops supplying oil to the rodless cavity of the oil cylinder, the jacking operation stops, at the moment, the load port of the balance valve on the balance valve group cuts off the output oil way of the rodless cavity, and the hovering is realized by supporting the load through oil pressure. Then the bearing nut is manually screwed down to be tightly attached to the upper end face of the oil cylinder body, then the unloading valve on the balance valve group is loosened, the oil pressure of a rodless cavity of the oil cylinder is manually unloaded, the oil pressure value is observed through a pressure gauge, at the moment, the load acting on the T-shaped seat completely acts on the annular area of the upper end of the oil cylinder body through the piston rod lead screw and the bearing nut, the oil pressure supporting load is switched to a mechanical supporting load state, the branch load is ensured to be reliably suspended for a long time, an oil inlet of a safety valve on the balance valve group is communicated with a load port of the balance valve, and when the ejection oil pressure of the oil cylinder exceeds the rated oil pressure, the safety valve is opened, and the working oil pressure is limited to exceed the rated oil pressure. And when the oil pressure of the oil cylinder is reduced to zero pressure, stopping the oil pump, detaching the oil pipe, and transferring the hydraulic station trolley to the next branch load point for operation.

The utility model discloses an electricity liquid jacking device with function of hovering has compact structure, removes characteristics such as convenient, jacking functional efficiency height, can realize unloaded ejecting fast, and the low-speed is ejecting during the loading to reliably keep the load to rise to hover for a long time after.

Drawings

FIG. 1 is a schematic view of the present invention;

in the figure: 1. the hydraulic cylinder comprises an oil cylinder, 2, a right-angle combined joint, 3, a pressure gauge, 4, a control oil path joint, 5, a balance valve, 6, a piston rod, 7, a bearing nut, 8, a T-shaped seat, 9, a split clamping plate, 10, a balance valve group protective cover, 11, a lifting lug, 12, a rod cavity safety valve, 13, a rod cavity oil seat, 14, a rodless cavity safety valve, 15, an unloading valve, 16 and a balance valve group.

Detailed Description

An electro-hydraulic jacking device with a hovering function comprises an oil cylinder 1, a piston rod 6 and a hand-push hydraulic station trolley, wherein a fixed-level variable pump is arranged in the hand-push hydraulic station trolley, and is characterized in that a balance valve group 16 is arranged on a rib plate on the outer wall of the oil cylinder 1, the balance valve group 16 is communicated with a rodless cavity of the oil cylinder through a right-angle combined joint 2, and is connected with an oil seat 13 of a rod cavity of the oil cylinder through a control oil path joint 4, and the oil seat 13 of the rod cavity is welded on the outer wall of the oil cylinder 1 and is communicated with a rod oil cavity of the oil cylinder; the front part of the piston rod 6 is provided with threads, and a bearing nut 7 is arranged on the threads of the piston rod 6; the head of the piston rod 6 is processed into a convex spherical shape and is connected with the concave spherical surface at the lower part of the T-shaped seat 8 through a split clamping plate 9 and a convex spherical head at the end part of the piston rod 6.

The inner hole of the bearing nut 7 arranged on the piston rod 6 consists of a screw hole at the upper part and a circular platform hole at the lower part, and the height requirement of the circular platform hole is greater than the maximum stroke of the oil cylinder.

And a balance valve 5, a rodless cavity safety valve 14, an unloading valve 15, a pressure gauge 3 and a control oil circuit joint 4 are arranged on the balance valve group 16.

A load port of a balance valve 5, a load port of a rodless cavity safety valve 14, an oil inlet of an unloading valve 15 and an oil inlet of a pressure gauge 3 which are arranged on a balance valve group 16 are communicated with a rodless cavity of the oil cylinder through the same oil way and a right-angle combined joint 2; the control port of the balance valve 5 and the oil outlet of the unloading valve 15 are communicated with the oil inlet seat 13 of the oil cylinder rod cavity through another common oil way through the control oil way joint 4 on the valve group; the oil discharge port of the rodless chamber safety valve 14 is communicated with the atmosphere through an independent oil path.

Claims (2)

1. The utility model provides an electricity liquid jacking device with function of hovering, includes hydro-cylinder (1), piston rod (6), hand push hydraulic pressure station dolly, is equipped with the fixed-grade variable pump in the hand push hydraulic pressure station dolly, its characterized in that: a balance valve group (16) is mounted on a rib plate on the outer wall of the oil cylinder (1), the balance valve group (16) is communicated with a rodless cavity of the oil cylinder through a right-angle combined joint (2) and is connected with an oil seat (13) of a rod cavity of the oil cylinder through a control oil path joint (4), and the oil seat (13) of the rod cavity is welded on the outer wall of the oil cylinder (1) and is communicated with the rod oil cavity of the oil cylinder; the front part of the piston rod (6) is provided with threads, and the bearing nut (7) is arranged on the threads of the piston rod (6); the head of the piston rod (6) is processed into a convex spherical shape and is connected with the concave spherical surface at the lower part of the T-shaped seat (8) through a split clamping plate (9) and a convex spherical head at the end part of the piston rod (6).

2. The electro-hydraulic jacking device with hovering function according to claim 1, wherein: the inner hole of the bearing nut (7) arranged on the piston rod (6) consists of a screw hole at the upper part and a circular platform hole at the lower part, and the height requirement of the circular platform hole is greater than the maximum stroke of the oil cylinder.

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