CN216518918U

CN216518918U - Hydraulic control's lift platform

Info

Publication number: CN216518918U
Application number: CN202123124125.XU
Authority: CN
Inventors: 史文华; 曹伟强; 吴建良; 胡森森; 李康康; 彭黄湖
Original assignee: Zhejiang Kingland & Pipeline Technologies Co ltd
Current assignee: Zhejiang Kingland & Pipeline Technologies Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-05-13
Anticipated expiration: 2031-12-14

Abstract

The utility model provides a hydraulic control's lift platform, relates to the hydraulic control field, including: an oil tank; the oil pumping mechanism is used for pumping hydraulic oil in the oil tank into an oil path; the reversing valve is arranged at the downstream of the oil pumping mechanism and used for reversing an oil way positioned at the downstream of the reversing valve; the plurality of working oil cylinders are arranged at the downstream of the reversing valve, are connected in parallel, and are used for lifting/lowering objects; the synchronous oil control mechanism is arranged at the downstream of the reversing valve and is used for simultaneously conveying the same amount of hydraulic oil into the plurality of working oil cylinders or receiving the hydraulic oil which simultaneously flows out of the plurality of working oil cylinders; the reversing valve, the synchronous oil control mechanism and the plurality of working oil cylinders form a loop, and the reversing valve controls the flow direction of hydraulic oil pumped by the oil pumping mechanism. The device not only expands the supporting range of the supporting platform by a plurality of oil cylinders which lift simultaneously, but also has simpler design of oil passages of the oil cylinders.

Description

Hydraulic control's lift platform

Technical Field

The utility model relates to the field of hydraulic control, in particular to a lifting platform controlled by hydraulic pressure.

Background

The hydraulic lifting device is mechanical equipment with strong jacking capacity and is applied to various fields, but a supporting platform which can be designed by a single lifting mechanism is limited in space, large materials are supported, or the machine is easy to shift and fall off in gravity center, if the supporting platform is designed into a structure with a large supporting area, the counterweight of the supporting platform is also greatly increased, the load of a hydraulic mechanism per se is limited, and once most of supporting capacity is separated from the supporting platform, the supporting capacity of the hydraulic mechanism is greatly reduced.

In order to solve the problems, the chinese utility model patent with the grant publication number CN101746692A discloses a multi-machine synchronous hydraulic lifting platform, which at least comprises more than three hydraulic lifters, each hydraulic lifter comprises an X-shaped lifting arm, a large cylinder and a small cylinder, the lower cavities of all the large cylinders are connected with an oil inlet pipe, the upper cavities of all the small cylinders are connected with an oil return pipe, the upper cavity of the large cylinder of each hydraulic lifter is connected in series with the oil circuit of the lower cavity of the small cylinder of one hydraulic lifter of the other hydraulic lifters, and the upper cavity of the large cylinder is connected in series with the lower cavities of the small cylinders of the different lifters in a staggered manner; and the function of synchronous lifting is realized.

However, the inventor of the present application finds that the above technical solutions have at least the following technical problems:

according to the technical scheme, the lifting platform adopts a scissor lifting platform, each lifting piece platform needs to adopt at least two oil cylinders in a cross-type design, the bottoms and the tops of the oil cylinders need to be hinged, and the telescopic rods of the oil cylinders are gradually tilted upwards in a lying state, crossed and obliquely supported to form a platform, so that the lifting mode is more complex and the lifting piece platform is more easily damaged.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides a hydraulic control lifting platform, which not only expands the supporting range of a supporting platform by a plurality of oil cylinders which lift simultaneously, but also simplifies the design of oil passages of the oil cylinders.

A hydraulically controlled lift platform comprising: an oil tank; the oil pumping mechanism is used for pumping hydraulic oil in the oil tank into an oil circuit; the reversing valve is arranged at the downstream of the oil pumping mechanism and used for reversing an oil way positioned at the downstream of the reversing valve; the plurality of working oil cylinders are arranged at the downstream of the reversing valve, are connected in parallel, and are used for lifting/lowering objects; the synchronous oil control mechanism is arranged at the downstream of the reversing valve and is used for simultaneously conveying the same amount of hydraulic oil into the plurality of working oil cylinders or receiving the hydraulic oil which simultaneously flows out of the plurality of working oil cylinders; the reversing valve, the synchronous oil control mechanism and the plurality of working oil cylinders form a loop, and the reversing valve controls the flow direction of hydraulic oil pumped by the oil pumping mechanism.

Preferably, the synchronous oil control mechanism includes a plurality of synchronous oil cylinders and a synchronous linkage, the synchronous linkage passes through the plurality of synchronous oil cylinders, the synchronous linkage divides the inside of each synchronous oil cylinder into a first chamber and a second chamber, the first chamber is provided with a first oil inlet and outlet hole, the second chamber is provided with a second oil inlet and outlet hole, the first oil inlet and outlet hole is connected in series with the reversing valve, and the second oil inlet and outlet hole is connected in series with a single working oil cylinder.

Preferably, the hydraulic system further comprises a pilot type pressure reducing valve, the pilot type pressure reducing valve is connected with the plurality of working oil cylinders in parallel, a plurality of tubular check valves are connected in series at the downstream of the pilot type pressure reducing valve, the plurality of tubular check valves are connected in parallel, and an oil path formed by connecting a single tubular check valve and the pilot type pressure reducing valve in series is connected with one working oil cylinder in parallel.

Preferably, a first overflow valve is arranged between the oil pumping mechanism and the reversing valve.

Preferably, the oil cylinder control system further comprises a plurality of second overflow valves, the number of the second overflow valves is the same as that of the working cylinders, and the plurality of second overflow valves are respectively arranged between the synchronous oil control mechanism and each working cylinder.

Preferably, the oil pumping mechanism comprises an electrically driven pump and a main check valve, and the main check valve is located downstream of the electrically driven pump.

Preferably, the oil pumping mechanism and the reversing valve are provided with pressure detection mechanisms.

Preferably, the oil pump further comprises an auxiliary unit including an oil filter disposed upstream of the oil pumping mechanism, and a liquid level gauge and an air cleaner disposed in the oil tank.

In summary, the utility model has the following advantages:

1. the working oil cylinders are synchronously lifted and lowered under the control of the whole system, so that the supporting range of a supporting platform is expanded, a large object can be lifted, meanwhile, the lifting mode of the working oil cylinders is simple in a manner of lifting the platform in a straight-up and straight-down manner, and the lifting capacity of the working oil cylinders is utilized to the maximum extent;

2. furthermore, a parallel auxiliary oil way is designed on the main oil way, a pilot type pressure reducing valve is arranged on the auxiliary oil way, the oil pressure in a part of pipe sections is reduced in the descending process of the working oil cylinder, and the hydraulic oil in the rodless section of the working oil cylinder smoothly flows into the synchronous oil control mechanism due to pressure difference;

3. furthermore, this application has designed a plurality of overflow valves on the oil circuit, keeps the inside oil pressure of system to tend to stable within range, protects entire system.

The benefits of further or other details will be discussed in the examples.

Drawings

FIG. 1 is a schematic illustration of an apparatus according to an embodiment of the present application;

fig. 2 is a schematic view of an apparatus according to another embodiment of the present application.

Detailed Description

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like as referred to or as may be referred to in this specification are defined with respect to the configuration shown in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a particular component and are relative terms, and thus may be changed accordingly depending on the position and the state of use of the particular component. Therefore, these and other directional terms should not be construed as limiting terms.

The utility model is further illustrated by the following examples:

example (b):

a hydraulic control lifting platform, please refer to FIG. 1, comprising an oil tank 1, an oil pumping mechanism 2, a reversing valve 3, a synchronous oil control mechanism 5 and three working cylinders 4, wherein the oil pumping mechanism 2 comprises an electric driving pump 21 and a main one-way valve CV-1, the synchronous oil control mechanism 5 comprises three synchronous cylinders 51 and a synchronous linkage 52, and more specifically, the electric driving pump 21 comprises a vane pump and a motor, the motor drives the vane pump to work to pump hydraulic oil in the oil tank 1 into an oil path, the synchronous linkage 52 comprises a linkage rod and three pistons, the three pistons are respectively located in the three synchronous cylinders 51, each piston divides the inside of one synchronous cylinder 51 into a first chamber 511 and a second chamber 512, the first chamber 511 is provided with a first oil inlet and outlet hole, the second chamber 512 is provided with a second oil inlet and outlet hole, the linkage rod passes through each synchronous cylinder 51 and serially connects the three pistons, so that the three pistons move in the three synchronous oil cylinders 51 at the same direction and speed; above, the main check valve CV-1 is located at the downstream of the electrically-driven pump 21, the reversing valve 3 is located at the downstream of the main check valve CV-1, the three working cylinders 4 are connected in parallel with each other and arranged at the downstream of the reversing valve 3, the first oil inlet and outlet hole is connected in series with the reversing valve 3, the second oil inlet and outlet hole is connected in series with the single working cylinder 4, an annular oil path is formed among the reversing valve 3, the synchronous oil control mechanism 5 and the three working cylinders 4, the trend of the hydraulic oil is determined by the control of the reversing valve 3, and the specific operation mode is explained below. In addition, in order to ensure that the working cylinders 4 maintain the state after the oil supply is stopped, a bidirectional hydraulic lock 41 is arranged on an oil path near each working cylinder 4, a right-way one-way valve of the bidirectional hydraulic lock 41 is connected with a rod cavity of the working cylinder 4, a left-way one-way valve is connected with a rodless cavity of the working cylinder 5, and the specific principle of the bidirectional hydraulic lock 41 is the prior art and is not described herein again.

In this embodiment, the reversing valve 3 is a three-position four-way electromagnetic reversing valve, and includes four connection ports A, B, P, T, where the port P is connected to the pumping mechanism 2, the port a is connected to the first chamber 511 of each synchronous cylinder 51, the port B is connected to the rod chamber of each working cylinder 4, and the port T is connected to the oil tank 1; in addition, an electromagnet 1Y and an electromagnet 2Y are arranged on the three-position four-way electromagnetic directional valve, wherein when the electromagnet 1Y is electrified, a port P, B of the three-position four-way electromagnetic directional valve is communicated, a port A, T of the three-position four-way electromagnetic directional valve is communicated, hydraulic oil in the three-position four-way electromagnetic directional valve flows to a port B from a port P, and hydraulic oil flows to a port T from a port A; when the electromagnet 2Y is energized, the ports P, A of the three-position four-way electromagnetic directional valve are communicated, the ports B, T of the three-position four-way electromagnetic directional valve are communicated, and hydraulic oil in the three-position four-way electromagnetic directional valve flows to the port a from the port P and flows to the port T from the port B.

In addition, in order to ensure the quality of the extracted hydraulic oil and conveniently observe the allowance of the hydraulic oil in the oil tank, the whole device also comprises an auxiliary component 9, wherein the auxiliary component 9 comprises an oil filter 91 arranged at the upstream of the oil pumping mechanism 2, a liquid level meter 92 and an air filter 93 which are arranged in the mailbox 1; a pressure detection mechanism 8 is further arranged between the main check valve CV-1 and the reversing valve 3 to conveniently detect the pressure in an oil path between the main check valve CV-1 and the reversing valve 3, a first overflow valve S-1 is further arranged between the main check valve CV-1 and the reversing valve 3, the first overflow valve S-1 can be preset with a threshold value, when the pressure in the oil path between the main check valve CV-1 and the reversing valve 3 exceeds the set threshold value, the first overflow valve S-1 can automatically unload oil, and the oil outlet end of the first overflow valve S-1 is communicated with the oil tank 1.

The system works as follows:

when the working oil cylinder 4 needs to be lifted, the electromagnet 2Y is electrified, at the moment, hydraulic oil sequentially passes through the oil filter 91, the vane pump, the main one-way valve CV-1 and the three-position four-way electromagnetic directional valve to enter the first chamber 511 of the synchronous oil cylinder 51, then the hydraulic oil in the second chamber 512 of the synchronous oil cylinder 51 is pushed to enter the rodless cavity of the working oil cylinder 4 through the two-way hydraulic lock 41, and the hydraulic oil in the rod cavity of the working oil cylinder 4 passes through the two-way hydraulic lock 41 to enter the three-position four-way electromagnetic directional valve and finally flows into the oil tank 1; when the oil supply ends of the left-way check valve and the right-way check valve in the bidirectional hydraulic lock 41 stop supplying oil, the working oil cylinder 4 stops returning oil under the action of the reset spring force and the oil hydraulic pressure of the left-way check valve and the right-way check valve, closes the oil cylinder, and plays a role in maintaining pressure, so that the working oil cylinder 4 is stabilized at the set height;

when the working oil cylinder 4 needs to be lowered, the electromagnet 1Y is electrified, at the moment, hydraulic oil sequentially passes through the oil filter 91, the vane pump, the main one-way valve CV-1, the three-position four-way electromagnetic directional valve and the two-way hydraulic lock 41 to enter the rod cavity of the working oil cylinder 4, the hydraulic oil in the rodless cavity of the working oil cylinder 4 is pushed to pass through the two-way hydraulic lock 41 to enter the second cavity 512 of the synchronous oil cylinder 51, and then the oil in the first cavity 511 of the synchronous oil cylinder 51 is pushed out to enter the three-position four-way electromagnetic directional valve and finally flows into an oil tank; similarly, the lowered position of the working cylinder 4 is also pressure-maintained and stabilized by the bidirectional hydraulic lock 41.

Further, referring to fig. 2, the working cylinders 4 are also connected in parallel with a pilot type pressure reducing valve 7, the pilot type pressure reducing valve 7 is connected in parallel with each working cylinder 4, a plurality of tubular check valves CV-2 are connected in series at the downstream of the pilot type pressure reducing valve 7, each tubular check valve CV-2 is connected in parallel, the flow direction of the control hydraulic oil of the tubular check valve CV-2 flows from the pilot type pressure reducing valve 7 to the synchronous cylinder 51, the number of the tubular check valves CV-2 is the same as that of the working cylinders 4, and each tubular check valve CV-2 is connected in parallel with one working cylinder 4; the pilot type pressure reducing valve 7 is mainly used for reducing the pressure of an oil pipe section between the tubular check valve CV-2 and the synchronous oil cylinder 51 in the descending process of the working oil cylinder 4, ensuring that hydraulic oil in a rodless section of the working oil cylinder 4 smoothly flows into the second chamber 512 of the synchronous oil cylinder 51 due to pressure difference, and effectively preventing the synchronous oil cylinder 51 from being incapable of working due to vacuum in the second chamber 512.

Still further, referring to fig. 2, a second overflow valve S-2 is further disposed between the working cylinder 4 and the synchronous cylinder 51; in the process that the working oil cylinder 4 rises, the second overflow valve S-2 can prevent a certain working oil cylinder 4 from being affected by an unexpected condition and prevent the system from being damaged due to overlarge hydraulic oil pressure, the second overflow valve S-2 can be preset with a threshold, and when the pressure in a certain path exceeds the set value of the second overflow valve S-2, the second overflow valve S-2 can automatically discharge oil to keep the stable range of an oil pressure area in the system, so that the system is protected.

The pilot type pressure reducing valve 7 also serves to supplement the hydraulic oil in the rodless chamber and the second chamber 512 of the working cylinder 4 because part of the hydraulic oil may enter the oil tank through the second relief valve S-2.

In addition, in the present embodiment, the hydraulic oil flowing out from the reversing valve 3, the pilot type pressure reducing valve 7, the first relief valve S-1, and the second relief valve S-2 all enters the oil tank 1, and of course, corresponding sub-tanks may be provided below the reversing valve 3, the pilot type pressure reducing valve 7, and the second relief valve S-2 for collection, specifically, according to the installation environment on site.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A hydraulically controlled lift platform, comprising:

an oil tank (1);

the oil pumping mechanism (2) is used for pumping hydraulic oil in the oil tank (1) into an oil path;

the reversing valve (3) is arranged at the downstream of the oil pumping mechanism (2) and is used for reversing an oil path at the downstream of the reversing valve;

the plurality of working oil cylinders (4) are arranged at the downstream of the reversing valve (3), the plurality of working oil cylinders (4) are connected in parallel, and the working oil cylinders are used for lifting/lowering objects;

the synchronous oil control mechanism (5) is arranged at the downstream of the reversing valve (3) and is used for simultaneously conveying the same amount of hydraulic oil into the plurality of working oil cylinders (4) or receiving the hydraulic oil which flows out of the plurality of working oil cylinders (4) simultaneously;

the reversing valve (3), the synchronous oil control mechanism (5) and the plurality of working oil cylinders (4) form a loop, and the reversing valve (3) controls the flow direction of hydraulic oil pumped by the oil pumping mechanism (2).

2. A hydraulically controlled lift platform as claimed in claim 1, wherein: the synchronous oil control mechanism (5) comprises a plurality of synchronous oil cylinders (51) and synchronous linkage pieces (52), the synchronous linkage pieces (52) are simultaneously connected with the synchronous oil cylinders (51) in a plurality, each synchronous oil cylinder (51) is internally divided into a first cavity (511) and a second cavity (512) by the synchronous linkage pieces (52), a first oil inlet and outlet hole is formed in the first cavity (511), a second oil inlet and outlet hole is formed in the second cavity (512), the first oil inlet and outlet hole is connected with the reversing valve (3) in series, and the second oil inlet and outlet hole is connected with the single working oil cylinder (4) in series.

3. A hydraulically controlled lift platform as claimed in claim 1, wherein: the hydraulic control system is characterized by further comprising a pilot type pressure reducing valve (7), wherein the pilot type pressure reducing valve (7) is connected with the working oil cylinders (4) in parallel, a plurality of tubular one-way valves (CV-2) are connected in series at the downstream of the pilot type pressure reducing valve (7), the tubular one-way valves (CV-2) are connected in parallel, and an oil way formed by connecting the tubular one-way valve (CV-2) and the pilot type pressure reducing valve (7) in series is connected with one working oil cylinder (4) in parallel.

4. A hydraulically controlled lift platform as claimed in claim 1, wherein: a first overflow valve (S-1) is also arranged between the oil pumping mechanism (2) and the reversing valve (3).

5. A hydraulically controlled lift platform as claimed in claim 1, wherein: the oil cylinder synchronous oil control device is characterized by further comprising a plurality of second overflow valves (S-2), the number of the second overflow valves (S-2) is the same as that of the working oil cylinders (4), and the second overflow valves (S-2) are respectively arranged between the synchronous oil control mechanism (5) and each working oil cylinder (4).

6. A hydraulically controlled lift platform as claimed in claim 1, wherein: the oil pumping mechanism (2) comprises an electrically-driven pump (21) and a main one-way valve (CV-1), wherein the main one-way valve (CV-1) is positioned at the downstream of the electrically-driven pump (21).

7. A hydraulically controlled lift platform as claimed in claim 1, wherein: and the oil pumping mechanism (2) and the reversing valve (3) are provided with a pressure detection mechanism (8).

8. A hydraulically controlled lift platform as claimed in claim 1, wherein: the oil pumping device also comprises an auxiliary assembly (9) which comprises an oil filter (91) arranged at the upstream of the oil pumping mechanism (2), a liquid level meter (92) arranged in the oil tank (1) and an air filter (93).