CN219279356U

CN219279356U - Hydraulic jacking system

Info

Publication number: CN219279356U
Application number: CN202221800632.2U
Authority: CN
Inventors: 段明智; 张勇; 胡旻; 杨宗阳
Original assignee: SHANGHAI AVIATION MACHINERY CO Ltd
Current assignee: SHANGHAI AVIATION MACHINERY CO Ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2023-06-30
Anticipated expiration: 2032-07-13

Abstract

The utility model belongs to the technical field of hydraulic systems, in particular to a hydraulic jacking system, wherein each hydraulic cylinder in a jacking component of the hydraulic jacking system is respectively provided with a base, the bottom of the side surface of the base is provided with a supporting plate, an oil tank is arranged on the supporting plate, the supporting plate is a sector plate, and the oil tank is correspondingly a sector oil tank, so that the oil tank is surrounded on the side surface of the base, the structure of a hydraulic jack in the jacking component is very compact, attractive, convenient to carry, convenient to move in position and more convenient to use; the stay cord displacement sensor is arranged beside the base of the hydraulic cylinder, so that the lifting height of the hydraulic cylinder can be detected, and when a plurality of hydraulic jacks are used together, the plurality of hydraulic jacks can be controlled to synchronously lift and lift the lifting weight conveniently. And the stay cord displacement sensor is installed on the supporting seat beside the base, and the stay cord of stay cord displacement sensor is connected to its piston rod from the inside of pneumatic cylinder after the diverting pulley is walked around for stay cord displacement sensor can not receive external disturbance, keeps the stability and the accuracy of range finding.

Description

Hydraulic jacking system

Technical Field

The utility model belongs to the technical field of hydraulic systems, and particularly relates to a hydraulic jacking system.

Background

In aircraft manufacturing, maintenance, jacks may be used for normal aircraft leveling, weighing, landing gear assembly and disassembly, and retraction, as well as jack-up of the aircraft during corrective and regulatory operations for the installation location of the on-board equipment. Because the aircraft weight is great, in the jacking process, need synchronous jacking of many pneumatic cylinders, in order to ensure the equilibrium of aircraft in the jacking process, many pneumatic cylinders need to keep the synchronization of going up and down.

In the prior art, a Chinese patent document with the publication number of CN108408637A describes a multi-station synchronous lifting control system and an operation method for lifting an airplane, wherein the multi-station synchronous lifting control system comprises a plurality of sets of airplane jacks with independent hydraulic stations, each airplane jack is provided with a displacement sensor, and all the hydraulic stations are respectively connected with an electrical control console through signal cables and control cables and are used for synchronously controlling the lifting action of the airplane jack; the Chinese patent document with publication number of CN108726420A describes a high-precision synchronous lifting control system and a control method for an airplane jack, wherein the system comprises at least three hydraulic jacks and a control device electrically connected with each hydraulic jack so as to realize synchronous lifting when the airplane is lifted.

The existing synchronous hydraulic lifting system for an aircraft also has the following disadvantages: firstly, the structures of the hydraulic jacks in the synchronous lifting system are relatively dispersed, for example, a hydraulic station and a hydraulic cylinder are mutually separated, and a plurality of devices need to be carried when moving, even the devices need to be disassembled for carrying, so that the hydraulic lifting system is very inconvenient. Secondly, the monitoring of the hydraulic system is lacking, for example, the existing synchronous hydraulic lifting system is only provided with a pressure gauge, so that the parameter monitoring in the running process of the system is less, and the safe, stable and accurate running of the hydraulic system is not facilitated. Thirdly, the detection mode of the lifting height of each hydraulic cylinder in the synchronous hydraulic lifting system is not stable enough, for example, a measuring device adopted in the patent document with the publication number of CN108726420A is an external sensor, the measuring device is not protected, the measuring device is easy to be interfered, for example, the measuring device is touched, and the measuring device is externally arranged, so that the whole synchronous lifting system is not beneficial to being controlled.

Disclosure of Invention

The utility model aims to provide a hydraulic lifting system, which solves the technical problems that in the prior art, each component part of a synchronous hydraulic lifting system for lifting an airplane is relatively dispersed and inconvenient to move, and the lifting distance of each hydraulic jack is not stable enough to monitor and is easy to be interfered.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the hydraulic lifting system comprises a lifting assembly, wherein the lifting assembly comprises a plurality of hydraulic jacks, each hydraulic jack comprises a hydraulic cylinder, an oil tank, a hydraulic pumping mechanism and a supporting structure, the hydraulic pumping mechanism is used for pumping oil between the corresponding oil tank and the corresponding hydraulic cylinders, the supporting structure is arranged around the corresponding hydraulic cylinders to play a supporting role, a base is arranged at the bottom of each hydraulic cylinder, a supporting plate is arranged at the bottom of the side face of the base, the oil tank is arranged on the supporting plate, the supporting plate is a sector plate, and the oil tank corresponds to a sector oil tank, so that the oil tank is surrounded on the side face of the base;

the hydraulic device is characterized in that a pull rope displacement sensor is further arranged beside the base, a supporting seat is arranged beside the base, the pull rope displacement sensor is installed on the supporting seat, a steering pulley is arranged on the supporting seat, and a pull rope of the pull rope displacement sensor is connected to a piston rod of the hydraulic cylinder from the inside of the hydraulic cylinder after passing through the steering pulley.

Preferably, the supporting structures of the hydraulic jacks are respectively provided with a supporting platform, and the hydraulic pumping mechanism comprises a box body which is arranged on the supporting platforms;

the front end of the supporting structure of each hydraulic jack is respectively provided with a traction rod, and the rear end of the supporting structure of each hydraulic jack is respectively provided with a traction buckle, so that the traction rods of the next hydraulic jack can be connected to the traction buckles of the previous hydraulic jack.

Preferably, a temperature sensor, an oil pollution monitoring sensor and a pressure sensor are arranged in the box body, and the temperature sensor, the oil pollution monitoring sensor and the pressure sensor are respectively used for detecting temperature information, pollution information and pressure information of oil flowing through the hydraulic pumping mechanism.

Preferably, the device also comprises a control cabinet;

the box body is internally provided with an electric hydraulic pump, a hand pump, a filter, a valve group and a control unit electrically connected to the control cabinet, wherein the control unit is used for controlling the electric hydraulic pump to work; the hand pump and the electric hydraulic pump oil liquid through separate oil ways respectively, so that the hand pump and the electric hydraulic pump can work independently; the filter and the valve group are arranged on oil paths of the corresponding hydraulic cylinders.

Preferably, the valve group comprises a reversing valve, an oil return valve and a proportional flow control valve, wherein the output ends of the hand pump and the electric hydraulic pump are respectively communicated with the reversing valve through one-way valves, the output end of the reversing valve is communicated with the oil return valve, and the output end of the oil return valve is used for being communicated with a corresponding hydraulic cylinder; the output end of the oil return valve is also communicated with the proportional flow control valve and is used for accurately controlling the oil quantity flowing into the hydraulic cylinder;

the valve group further comprises a flow control valve communicated with the output end of the electric hydraulic pump and a safety valve respectively communicated with the output ends of the hand pump and the electric hydraulic pump.

Preferably, the supporting structure of each hydraulic jack comprises three groups of supporting components arranged around the hydraulic cylinder, each supporting component comprises an inclined strut, and a supporting disc is arranged at the bottom of each inclined strut; the hydraulic cylinder is characterized in that an upper support is arranged outside the hydraulic cylinder, three groups of hinged lugs are arranged on the upper support and the periphery of the base respectively, the top of the inclined strut is hinged to the hinged lugs on the periphery of the upper support, and the lower part of the inclined strut is hinged to the hinged lugs on the periphery of the base through a pull rod.

Preferably, the inclined strut of each supporting component is also provided with a transverse supporting rod, one end of the transverse supporting rod is provided with a screw sleeve, the screw sleeve is provided with a universal bracket, and the bottom of the universal bracket is provided with a roller; the support platform is arranged between two of the transverse support rods.

Preferably, the traction rod is a folding traction rod, the folding traction rod comprises a plurality of short rods, the adjacent short rods are connected through hinges, each hinge comprises a hinge seat and a hinge joint which are connected through a rotating shaft, a first limiting hole is formed in the hinge seat, and a corresponding second limiting hole is formed in the hinge joint; a limiting pin is arranged in the first limiting hole, one side of the limiting pin is connected with a deflector rod, one side of the first limiting hole is provided with a deflector rod hole, the deflector rod is positioned in the deflector rod hole, and the outer end of the deflector rod is provided with a tightening nut; when the hinge seat is connected with the hinge head, the limiting pin is driven into the second limiting hole through the driving lever, and the tightening nut is screwed down, so that the hinge can be locked.

Preferably, a pressure gauge for detecting the oil pressure of the hydraulic pumping mechanism is further arranged in the box body, and a pressure gauge display window is arranged on one side of the box body.

Preferably, the number of the hand pumps is two, and the hand pumps are respectively arranged at two sides in the box body; the electric hydraulic pump comprises a brushless motor and a plunger pump which are connected.

Compared with the prior art, the utility model has the beneficial effects that:

1. the bottom of each pneumatic cylinder in this hydraulic jacking system's the jacking subassembly is equipped with the base respectively, and base side bottom is equipped with the backup pad, and the oil tank setting is in the backup pad, and the backup pad is the sector plate, and the oil tank corresponds to the sector oil tank for the oil tank is embraced in the base side, thereby the structure of hydraulic jack in the jacking subassembly is very compact, and is more pleasing to the eye, conveniently carries, conveniently removes the position, and it is more convenient to use.

2. The stay cord displacement sensor is arranged beside the base of the hydraulic cylinder, so that the lifting height of the hydraulic cylinder can be detected, and when a plurality of hydraulic jacks are used together, the plurality of hydraulic jacks can be controlled to synchronously lift and lift the lifting weight conveniently. And the stay cord displacement sensor is installed on the supporting seat beside the base, and the stay cord of stay cord displacement sensor is connected to its piston rod from the inside of pneumatic cylinder after the diverting pulley is walked around for stay cord displacement sensor can not receive external disturbance, keeps the stability and the accuracy of range finding.

3. The hydraulic lifting system comprises a hydraulic lifting system, wherein a supporting platform is arranged on a supporting structure of each hydraulic jack, the hydraulic pumping mechanism comprises a box body, the box body is arranged on the supporting platform, a traction rod is arranged at the front end of the supporting structure of each hydraulic jack, a traction buckle is arranged at the rear end of the supporting structure of each hydraulic jack, the traction rod of the next hydraulic jack can be connected to the traction buckle of the previous hydraulic jack, and therefore all components of the hydraulic lifting system are integrated, the hydraulic lifting system is convenient to move, and the hydraulic lifting system can be unfolded conveniently and rapidly.

4. The hydraulic jack of the hydraulic jacking system is provided with the pressure sensor, the temperature sensor and the oil pollution monitoring sensor, so that the pressure, the temperature and the pollution of an oil way can be detected, the functions are more complete, the hydraulic jack is suitable for working conditions with higher requirements on oil way monitoring, and the safety is ensured.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a jacking assembly according to an embodiment of the hydraulic jacking system of the present utility model.

Fig. 2 is a schematic perspective view of a hydraulic jack according to an embodiment of the hydraulic jack system of the present utility model.

Fig. 3 is a schematic structural view of a tank and a hydraulic pumping mechanism of a hydraulic jack in an embodiment of the hydraulic jacking system of the present utility model.

Fig. 4 is a schematic view of a supporting structure of a hydraulic jack in an embodiment of the hydraulic jacking system of the present utility model.

Fig. 5 is a schematic perspective view of a hydraulic cylinder of a hydraulic jack in an embodiment of the hydraulic jacking system according to the present utility model.

Fig. 6 is a schematic structural diagram of a pull-string displacement sensor of a hydraulic jack in an embodiment of the hydraulic jacking system according to the present utility model.

Fig. 7 is a schematic view of the installation of the displacement sensor of the pull rope of the hydraulic jack on the hydraulic cylinder in an embodiment of the hydraulic jacking system of the present utility model.

Fig. 8 is a schematic perspective view of a hydraulic pumping mechanism in an embodiment of the hydraulic jack system according to the present utility model.

Fig. 9 is a schematic diagram showing an internal structure of a hydraulic pumping mechanism in an embodiment of the hydraulic jack system according to the present utility model.

FIG. 10 (a) is a right side view of a control cabinet in an embodiment of the hydraulic lift system of the present utility model; part (b) of fig. 10 is a front view of a control cabinet in an embodiment of the hydraulic jacking system of the present utility model.

Fig. 11 is a hydraulic schematic diagram of a hydraulic jack in an embodiment of the hydraulic jacking system of the present utility model.

Fig. 12 is a schematic structural view of a moving mechanism of a hydraulic jack in an embodiment of the hydraulic jacking system according to the present utility model.

FIG. 13 (a) is a schematic view of a hydraulic jack in an embodiment of the hydraulic jack system of the present utility model with the hinges separated; part (b) of fig. 13 is a schematic view of the hinge.

Fig. 14 is a top view of a hydraulic jack in an embodiment of the hydraulic jacking system of the present utility model.

In the drawings, each reference numeral is intended to: the hydraulic jack 10, the hydraulic cylinder 1, the main oil tank 11, the auxiliary oil tank 12, the base 13, the supporting plate 131, the level gauge 132, the connecting port 133, the pull rope displacement sensor 14, the supporting seat 141, the pull rope 142, the plug rod 15, the lifting oil chamber 16, the descending oil chamber 17, the upper support 18, the safety nut 19, the hydraulic pumping mechanism 2, the box body 21, the inclined strut 3, the adapter 31, the transverse supporting rod 32, the threaded sleeve 33, the supporting disc 34, the pull rod 35, the universal bracket 4, the heightening hand wheel 41, the lifting lug 42, the pulling rod 43, the hinge 431, the hinge seat 4311, the hinge 4312, the rotating shaft 4313, the first limiting hole 4314, the second limiting hole 4315, the limiting pin 4317, the pulling rod hole 4318, the pulling rod 4319, the tightening nut 4310, the pulling buckle 44, the supporting platform 45, the plunger brushless motor 5, the 51, the coupling 52, the bracket 53, the control unit 54, the filter 55, the pressure gauge 56, the reversing valve 61, the oil return valve 62, the proportional flow control valve 63, the flow control valve 64, the oil pollution sensor 65, the temperature sensor 66, the wheel switch gear 68, the safety cable 68, the wheel switch gear 81, the safety cable 81, the electric appliance control chamber 81, the one-way pump 81, the safety gear box 8, the safety gear control cable 81, the safety gear box.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

A hydraulic lifting system, please refer to fig. 1 to 14.

As shown in fig. 1, the hydraulic jacking system comprises a jacking component, the jacking component comprises three hydraulic jacks 10, the three hydraulic jacks 10 are connected front and back, the traction and movement positions are convenient, all parts of each hydraulic jack 10 are integrated, and after the hydraulic jacking system moves at the working position, the hydraulic jacking system can be quickly unfolded to perform jacking operation.

Each hydraulic jack 10 includes a hydraulic cylinder 1, an oil tank, a hydraulic pumping mechanism 2 and a supporting structure respectively as shown in fig. 2, the oil tank includes a main oil tank 11 and an auxiliary oil tank 12 as shown in fig. 3, ventilation caps are respectively arranged on the main oil tank 11 and the auxiliary oil tank 12, and the main oil tank 11 and the auxiliary oil tank 12 are used for storing hydraulic oil, and the hydraulic oil in the auxiliary oil tank 12 is reserved.

As shown in fig. 4, the support structure of the hydraulic jack 10 includes three sets of support members for being disposed around the hydraulic cylinder 1 for stable support. Each group of supporting components comprises an inclined strut 3, the inclined strut 3 is a round tube, the bottom of the inclined strut 3 is connected with a supporting disc 34 through a ball head, the supporting disc 34 is used for supporting the ground, an upper support 18 is arranged outside the hydraulic cylinder 1, a base 13 is arranged at the bottom of the hydraulic cylinder 1, three groups of hinged lugs are uniformly arranged on the peripheries of the upper support 18 and the base 13 respectively, the top of the inclined strut 3 is hinged to the hinged lugs on the periphery of the upper support 18, a pull rod 35 is hinged to the inner side of the lower part of the inclined strut 3, and accordingly the lower part of the inclined strut 3 is hinged to the hinged lugs on the periphery of the base 13 through the pull rod 35, and the inclined strut 3 can be folded around the hydraulic cylinder 1.

As shown in fig. 5, two support plates 131 are provided at the bottom of the side of the base 13, and a level gauge 132 is provided at the side of the support plates 131 for measuring the level. The main oil tank 11 and the auxiliary oil tank 12 are respectively fixed on two supporting plates 131, the supporting plates 131 are fan-shaped plates, the main oil tank 11 and the auxiliary oil tank 12 are fan-shaped oil tanks correspondingly, the main oil tank 11 and the auxiliary oil tank 12 are encircling on the side face of the base 13, and accordingly the hydraulic cylinder 1, the main oil tank 11 and the auxiliary oil tank 12 form a more compact structure.

As shown in fig. 2, a pull rope displacement sensor 14 is further arranged beside the base of the hydraulic cylinder 1, and in combination with fig. 6, the pull rope displacement sensor 14 is installed on a supporting seat 141, as shown in fig. 5, a connecting port 133 is arranged at one side of the bottom of the base 13, the supporting seat 141 is installed at the connecting port 133, as shown in fig. 7, a pull rope 142 of the pull rope displacement sensor 14 is connected to a piston rod 15 inside the hydraulic cylinder 1 after being turned through two pulleys 143, in this way, the pull rope displacement sensor 14 is installed on one side of the hydraulic cylinder 1 in a fastening way, the pull rope 142 of the pull rope displacement sensor 14 is positioned inside and cannot be interfered by the outside, and in the process of lifting an aircraft, the pull rope 142 cannot be interfered by exposure.

The hydraulic cylinder 1 is a two-stage telescopic hydraulic cylinder, the piston rod 15 is the uppermost piston rod of the hydraulic cylinder 1, and when the hydraulic cylinder 1 ascends, the piston rod 15 firstly ascends, so that the stay cord displacement sensor 14 can detect the real lifting height of the hydraulic cylinder.

As shown in fig. 7, the hydraulic cylinder 1 is internally provided with a lifting oil cavity 16 and a descending oil cavity 17, the outside of the hydraulic cylinder 1 is provided with a lifting oil port and a descending oil port which are respectively communicated with the lifting oil cavity 16 and the descending oil cavity 17, the lifting oil port is communicated with an oil inlet pipe, the descending oil port is communicated with an oil return pipe, when oil is pumped into the lifting oil cavity 16, the hydraulic cylinder 1 is lifted, when oil is pumped into the descending oil cavity 17, the hydraulic cylinder 1 descends, for example, when the hydraulic cylinder 1 has no bearing, the oil is required to be pumped into the descending oil cavity 17, so that the hydraulic cylinder 1 actively descends.

In this embodiment, the pull cord 142 passes through the lifting oil chamber 16, and the supporting seat 141 is sealed with the lifting oil chamber 16. In other embodiments, a separate channel may be provided in the lift oil chamber, for example, the lift oil chamber may be C-shaped, and a notch in the middle of the lift oil chamber may pass through the pull cord.

The hydraulic pumping mechanism 2 of the hydraulic jack 10 is internally provided with a pump and a valve group for pumping oil between an oil tank and the hydraulic cylinder 1, so as to realize lifting of the hydraulic cylinder 1. Specifically, as shown in connection with fig. 8, the hydraulic pumping mechanism 2 includes a tank 21, and the pump and the valve group are both disposed in the tank 21. As shown in fig. 9, the electric hydraulic pump and the hand pump 7 are simultaneously arranged in the box 21, and the two hand pumps 7 are respectively communicated with the hydraulic cylinder 1 through separate oil passages, so that the hydraulic cylinder 1 can be controlled to lift in an electric and manual mode.

The housing 21 includes a bottom plate and a cover, as shown in fig. 9, on the bottom plate on which the electric hydraulic pump is mounted, the electric hydraulic pump includes a plunger pump 5 and a brushless motor 51, the plunger pump 5 is connected with the brushless motor 51 through a coupling 52, the electric hydraulic pump further includes a bracket 53, the plunger pump 5 and the brushless motor 51 are mounted on the bracket 53, and the bracket 53 is mounted on the bottom plate 11. In this embodiment, the brushless motor 51 is a motor of model D110BLD2000-48A-30S, and the plunger pump 5 is a swash plate type axial plunger pump of model CY 14-1B.

The bottom plate of the box body 21 is also provided with a control unit 54, the hydraulic jacking system further comprises a control cabinet 8 shown in fig. 10, the control unit 54 is electrically connected to the control cabinet 8, the control unit 54 is a brushless controller and is used for controlling the brushless motor 51 to work, a PLC (programmable logic controller) is arranged in the control cabinet 8, the control cabinet 8 controls the rotating speed of the brushless motor 51 through the control unit 54, and the brushless motor 51 drives the plunger pump 5 to pump oil, so that the flow of the oil pumped by the plunger pump 5 can be controlled.

The control cabinet 8 bottom is equipped with wheel 81, and the rear side is equipped with cable storeroom 82, and the front side bottom is equipped with electrical cabinet 83, and the front side top is equipped with operation platform 84, conveniently promotes the control cabinet through wheel 81 and removes the position, puts the cable in the cable storeroom 82 of rear side, is connected to each hydraulic jack through the cable, and the PLC controller sets up in electrical cabinet 83, and operation platform 84 at top then can input control signal.

As shown in fig. 9, a filter 55 is further disposed in the tank 21, the valve set disposed in the tank 21 includes a reversing valve 61, an oil return valve 62, a proportional flow control valve 63, and a flow control valve 64, the reversing valve 61 is an electromagnetic manual reversing valve, and, in combination with fig. 11, output ends of the two hand pumps 7 and the electric hydraulic pump are respectively communicated to the reversing valve 61 via a one-way valve 68, output ends of the reversing valve 61 are communicated to the oil return valve 62, output ends of the oil return valve 62 are used for being communicated to the hydraulic cylinder 1, and output ends of the oil return valve 62 are also communicated to the proportional flow control valve 63 for precisely controlling an amount of oil flowing into the hydraulic cylinder 1.

As shown in fig. 11, a temperature sensor 66 and an oil pollution monitoring sensor 65 are further disposed in the tank 21, wherein the type of the oil pollution monitoring sensor 65 is KZYU-01, and the temperature sensor 66 and the oil pollution monitoring sensor 65 are respectively used for detecting temperature information and pollution information of oil flowing through the hydraulic source and transmitting the temperature information and the pollution information to the control cabinet 8.

In addition, a pressure gauge 56 is provided in the casing of the hydraulic pumping mechanism 1, and as shown in fig. 8, a pressure gauge display window is provided on the front side of the casing 21. In addition, as shown in fig. 11, a pressure sensor 57 is further installed on an oil path connected to the hydraulic cylinder 1, so that the control cabinet 8 can collect pressure state information conveniently.

As shown in fig. 11, the valve block of the hydraulic pumping mechanism 1 further includes an overflow valve 69 connected to the output end of the electric hydraulic pump, and further includes a relief valve 67 connected to the output ends of the hand pump 7 and the electric hydraulic pump, respectively, the relief valve 67 being for controlling the output pressure not to exceed a prescribed value. The hydraulic cylinder 1 is also connected to the tank via a relief valve 101, the relief valve 101 also being part of the valve block.

Further, as shown in fig. 5, in order to ensure safe use, two safety nuts 19 are provided outside the hydraulic cylinder 1, and since the hydraulic cylinder 1 is a two-stage telescopic hydraulic cylinder, two safety nuts 19 are provided, the two safety nuts 19 are respectively used for locking two extended piston rods, trapezoidal threads (not shown in the figure) are provided outside the piston rods, the safety nuts 19 are matched with the piston rods through the trapezoidal threads, and when the piston rods extend, the safety nuts can be screwed to the lowest part to play a supporting role.

The hydraulic jack further comprises a moving mechanism shown in fig. 12, the moving mechanism comprises a front group of two wheels and a rear group of two independent wheels, a transverse supporting rod 32 is further arranged on the inclined supporting column 3 of the supporting assembly, an adapter 31 is arranged on the inclined supporting column 3, the transverse supporting rod 32 is connected to the inclined supporting column 3 through the adapter 31, a screw sleeve 33 is arranged at the outer end of the transverse supporting rod 32, and the moving mechanism is installed through the screw sleeve 33.

As shown in fig. 12, the moving mechanism includes three sets of universal brackets, and in combination with fig. 2, each universal bracket 4 is correspondingly mounted on a corresponding screw sleeve 33 by welding or screwing, wherein two wheels of the same set in the front are mounted on the bottom of the same universal bracket, and two separate wheels in the rear are respectively mounted on the bottom of one universal bracket.

Referring to fig. 12, the gimbal 4 is provided with a height-adjusting hand wheel 41, the gimbal 4 includes an external sleeve and an internal screw, the height-adjusting hand wheel 41 is disposed at the top of the screw, and when the height-adjusting hand wheel 41 is rotated, the height of the wheel can be adjusted. The hydraulic jack is also provided with lifting lugs 42, and the lifting lugs 42 are welded on the transverse supporting rods 32 for lifting.

As shown in fig. 12, a folding type pulling rod 43 is connected to the forefront gimbal, and the pulling rod 43 includes three short rods, and is connected in this order from front to back by a hinge 431, so that the pulling rod 43 can be folded. As shown in fig. 13, the hinge 431 includes a hinge seat 4311 and a hinge head 4312 connected by a rotation shaft 4313, wherein a first limiting hole 4314 is provided on the hinge seat 4311, a corresponding second limiting hole 4315 is provided on the hinge head 4312, a limiting pin 4317 is provided in the first limiting hole 4314, one side of the limiting pin 4317 is connected with a driving lever 4319, one side of the first limiting hole 4314 is provided with a driving lever hole 4318, the driving lever 4319 is located in the driving lever hole 4318, a fastening nut 4310 is provided at the outer end of the driving lever 4319, when the hinge seat 4311 is connected with the hinge head 4312, the limiting pin 4317 is driven into the second limiting hole 4315 by the driving lever 4319, and the fastening nut 4310 is screwed, so that the hinge 431 can be locked.

As shown in fig. 2, the rear end of the support structure of the hydraulic jack 10 is provided with a pulling buckle 44, and as shown in fig. 1, the pulling rod 43 of the subsequent hydraulic jack 10 can be connected to the pulling buckle 44 of the previous hydraulic jack 10.

In addition, as shown in fig. 14, the supporting structures of the hydraulic jack 10 are respectively provided with supporting platforms 45, the supporting platforms 45 are disposed between two of the lateral support rods 32, and the tank 21 of the hydraulic pumping mechanism 2 is disposed on the supporting platforms 45.

Referring to fig. 11, the lifting operation mode of each hydraulic jack in the hydraulic lifting system is as follows:

(1) Manually ascending: before the hydraulic jack is used, an oil return valve 62 (a one-way throttle valve) is closed, and a reversing valve 61 is adjusted to a lifting position; the hand pump 7 is rocked to suck out the hydraulic oil from the oil tank, and the hydraulic oil reaches the lifting oil cavity 16 of the hydraulic cylinder 1 along the oil path through the filter 55, the one-way valve 68 and the reversing valve 61, so that the hydraulic cylinder 1 is lifted, and the hydraulic oil in the descending oil cavity 17 flows back to the oil tank in the lifting process of the hydraulic cylinder 1. In addition, when the pressure of the oil path reaches the set overflow pressure, the hydraulic oil pumped by the hand pump 7 is unloaded by the safety valve 67, so as to prevent accidents caused by overload of the hydraulic cylinder 1.

(2) Manual descent: firstly, the safety nut 19 is screwed to the highest position, then the reversing valve 61 is adjusted to the 'descending' position, the oil return valve 62 is slowly opened, when the bearing of the hydraulic cylinder 1 descends, hydraulic oil in the hydraulic cylinder 1 flows back to the oil tank along a pipeline, and meanwhile, the descending speed of the piston rod is controlled by adjusting the opening of the oil return valve 62;

when the hydraulic cylinder 1 descends under no load, the hand pump 7 is slowly rocked, hydraulic oil is injected into the descending oil cavity 17 of the hydraulic cylinder 1, a piston rod of the hydraulic cylinder 1 is forced to descend, hydraulic oil in the ascending oil cavity 16 flows back to an oil tank in the descending process, and an overflow valve 65 is arranged on an oil way of the descending oil cavity 17 to prevent pressure accumulation from damaging a sealing element.

(3) Electric lifting: after the power line and the control line of the electric hydraulic pump are connected, the electric hydraulic pump is started again after the oil return valve 62 is closed, hydraulic oil is sucked out of the oil tank, the flow is controlled by the flow control valve 64 along the oil path, the hydraulic oil enters the lifting oil cavity 16 of the hydraulic cylinder 1 after passing through the reversing valve 61 and the proportional flow control valve 63 to lift the piston rod, and the safety valve 69 is arranged on the electrically lifted oil path to prevent the pressure of the oil path from exceeding the standard. In addition, a pressure gauge 56 and a pressure sensor 56 are arranged on an oil path connected with the hydraulic cylinder 1, so that the observation and information collection of the pressure state are convenient.

(4) Electric descent: firstly, the safety nut 19 is screwed to the highest position of a piston rod, then the reversing valve 61 is switched to the 'descending' position, the flow ratio of the proportional flow control valve 63 is slowly operated, the hydraulic cylinder 1 descends under the gravity of a heavy object (such as an airplane) on the hydraulic cylinder 1, and after the heavy object is not descended any more, the electric hydraulic pump is started to pump oil according to the minimum flow, so that oil enters the descending oil cavity 17 of the hydraulic cylinder, and the descending work of the hydraulic cylinder 1 is completed.

The hydraulic jacking system has the working principle that: in the electric control process, the lifting of each hydraulic jack is controlled through the control cabinet, the electric hydraulic pump pumping of each hydraulic jack is controlled to keep the same flow, and lifting data sensed by the stay cord displacement sensor are observed in real time, so that each hydraulic jack keeps synchronous lifting. When the lifting device is manually lifted, the manual lifting height can be controlled based on lifting data sensed by the stay cord displacement sensor.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hydraulic jacking system, includes the jacking subassembly, the jacking subassembly includes many hydraulic jacks, each hydraulic jack includes pneumatic cylinder, oil tank, hydraulic pumping mechanism and bearing structure respectively, hydraulic pumping mechanism is used for pumping fluid between corresponding oil tank and pneumatic cylinder, bearing structure sets up around corresponding pneumatic cylinder in order to play supporting role, its characterized in that: the bottom of each hydraulic cylinder is provided with a base respectively, the bottom of the side surface of the base is provided with a supporting plate, the oil tank is arranged on the supporting plate, the supporting plate is a sector plate, and the oil tank is a sector oil tank correspondingly, so that the oil tank is surrounded on the side surface of the base;

2. The hydraulic jacking system of claim 1, wherein: the supporting structures of the hydraulic jacks are respectively provided with a supporting platform, and the hydraulic pumping mechanism comprises a box body which is arranged on the supporting platforms;

3. The hydraulic jacking system of claim 2, wherein: the box is provided with a temperature sensor, an oil pollution monitoring sensor and a pressure sensor, wherein the temperature sensor, the oil pollution monitoring sensor and the pressure sensor are respectively used for detecting temperature information, pollution information and pressure information of oil flowing through the hydraulic pumping mechanism.

4. The hydraulic jacking system of claim 2, wherein: the device also comprises a control cabinet;

5. The hydraulic jacking system of claim 4, wherein: the valve group comprises a reversing valve, an oil return valve and a proportional flow control valve, wherein the output ends of the hand pump and the electric hydraulic pump are respectively communicated with the reversing valve through one-way valves, the output end of the reversing valve is communicated with the oil return valve, and the output end of the oil return valve is used for being communicated with a corresponding hydraulic cylinder; the output end of the oil return valve is also communicated with the proportional flow control valve and is used for accurately controlling the oil quantity flowing into the hydraulic cylinder;

6. The hydraulic jacking system of claim 2, wherein: the support structure of each hydraulic jack comprises three groups of support components arranged around the hydraulic cylinder, each support component comprises an inclined strut, and a support disc is arranged at the bottom of each inclined strut; the hydraulic cylinder is characterized in that an upper support is arranged outside the hydraulic cylinder, three groups of hinged lugs are arranged on the upper support and the periphery of the base respectively, the top of the inclined strut is hinged to the hinged lugs on the periphery of the upper support, and the lower part of the inclined strut is hinged to the hinged lugs on the periphery of the base through a pull rod.

7. The hydraulic jacking system of claim 6, wherein: the inclined struts of the supporting components are also provided with transverse supporting rods, one end of each transverse supporting rod is provided with a screw sleeve, the screw sleeve is provided with a universal bracket, and the bottom of each universal bracket is provided with a roller; the support platform is arranged between two of the transverse support rods.

8. The hydraulic jacking system of claim 2, wherein: the traction rod is a folding traction rod, the folding traction rod comprises a plurality of short rods, the adjacent short rods are connected through hinges, each hinge comprises a hinge seat and a hinge joint which are connected through a rotating shaft, a first limiting hole is formed in each hinge seat, and a corresponding second limiting hole is formed in each hinge joint; a limiting pin is arranged in the first limiting hole, one side of the limiting pin is connected with a deflector rod, one side of the first limiting hole is provided with a deflector rod hole, the deflector rod is positioned in the deflector rod hole, and the outer end of the deflector rod is provided with a tightening nut; when the hinge seat is connected with the hinge head, the limiting pin is driven into the second limiting hole through the driving lever, and the tightening nut is screwed down, so that the hinge can be locked.

9. The hydraulic jacking system of claim 2, wherein: the hydraulic pumping mechanism is characterized in that a pressure gauge for detecting the oil pressure of the hydraulic pumping mechanism is further arranged in the box body, and a pressure gauge display window is arranged on one side of the box body.

10. The hydraulic jacking system of claim 4, wherein: the two hand pumps are respectively arranged at two sides in the box body; the electric hydraulic pump comprises a brushless motor and a plunger pump which are connected.