CN108738331B - A quick lift hydraulic device - Google Patents

Abstract

A quick lifting device comprises a lifting oil cylinder (1), a combined valve block (2), a rod cavity oil way (4), a rodless cavity oil way (5) and an oil supply mechanism (3), wherein the lifting oil cylinder (1) comprises a rod cavity and a rodless cavity, the combined valve block (2) comprises a one-way stop valve and a two-way stop valve, the oil supply mechanism (3) comprises an oil pump and an oil tank, and the oil pump is arranged on an external oil connection way of the oil tank and used for pumping oil; in the lifting state: the oil pump is connected with one end of the two-way stop valve through an oil way; the oil pump is connected with the rod cavity through a rod cavity oil way (4), and the other end of the two-way stop valve is connected with the rodless cavity through a rodless cavity oil way (5); in the descending state: the oil pump is connected with the rod cavity through a rod cavity oil way (4), the rodless cavity is connected with the oil inlet end of the one-way stop valve through a rodless cavity oil way (5), and the oil outlet end of the one-way stop valve is connected with the oil tank through an oil way. The rapid lifting device has the advantage of greatly improving the lifting speed.

Description

A quick lift hydraulic device

technical field

The invention belongs to the field of hydraulic pressure, and in particular relates to a hydraulic device with improved lifting efficiency.

Background technique

As the most common application of hydraulic transmission technology, hydraulic lifting devices appear in various engineering fields, large and small. The structure of common hydraulic lifting devices is as follows, including lifting cylinder, oil circuit and fuel tank. During use, the fuel tank Add hydraulic oil to one end of the oil cylinder, push the piston rod, and at the same time the other end of the oil cylinder returns the hydraulic oil to the oil tank. When the application direction is opposite, the process is reversed, because the oil path is long during the pushing process, and the hydraulic pressure The filling speed of the oil is limited, so the piston stroke cycle is long and the lifting is slow, which greatly affects the work efficiency when the lifted object is not heavy.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a hydraulic device for improving lifting efficiency.

The technical scheme of the present invention is as follows:

A quick lifting device includes a lifting oil cylinder, a combined valve block, an oil circuit with a rod cavity, an oil circuit without a rod cavity and an oil supply mechanism, the lifting oil cylinder includes a rod cavity and a rodless cavity, and the combined valve The block includes a one-way stop valve and a two-way stop valve, the oil supply mechanism includes an oil pump and an oil tank, and the oil pump is arranged on an external oil road of the oil tank for pumping oil; in the lifting state: the oil pump passes the oil The two-way stop valve is connected with one end of the two-way stop valve; the oil pump is connected with the rod cavity through the rod cavity oil circuit, and the other end of the two-way stop valve is connected with the rod cavity through the rodless cavity oil circuit. The rod cavity is connected; in the descending state: the oil pump is connected to the rod cavity through the rod cavity oil circuit, and the rodless cavity is connected to the oil inlet end of the one-way stop valve through the rod cavity oil circuit, so the The oil outlet end of the one-way stop valve is connected to the oil tank through an oil circuit.

The oil circuit between the oil pump and the two-way stop valve and the rod cavity oil circuit are connected on the external oil circuit of the oil outlet end of the oil pump.

The lift cylinder is provided with one group.

There are at least two groups of the lifting oil cylinders, each group of the lifting oil cylinders is arranged in parallel, and the fast lifting device further includes a multi-channel synchronizer, and the multi-channel synchronizer is arranged on the oil path of the rodless cavity, The multi-channel synchronizer is respectively communicated with the rodless cavity of each of the lifting cylinders through an oil circuit; in the lifting state, the multi-channel synchronizer is connected to the two-way stop valve through the rodless cavity oil circuit ; In the descending state, the multi-channel synchronizer is connected to the one-way stop valve through the rodless cavity oil circuit.

The oil supply mechanism further includes a one-way valve, and the one-way valve is arranged on the external oil circuit of the oil outlet end of the oil pump.

The quick lift hydraulic device also includes an overflow valve, the overflow valve includes an overflow valve and an overflow pipeline, the overflow pipeline is arranged at both ends of the overflow valve, and the overflow pipeline One end of the road is connected to the external oil circuit of the one-way valve outlet, and the other end of the overflow valve is connected to the oil tank.

The pipeline between the relief valve pipeline and the one-way stop valve and the oil tank is connected to an external pipeline of the oil tank.

The quick-lift hydraulic device further includes a throttle valve, the throttle valve is arranged on the oil path with the rod cavity, and one end of the throttle valve is connected to the multi-channel synchronizer through the oil path with the rod cavity. The collecting pipeline is connected; in the lifting state, the other end of the throttle valve is connected with the two-way shut-off valve through the rod cavity oil circuit; in the descending state, the other end of the throttle valve passes through the The rod cavity oil circuit is connected with the inlet of the one-way throttle valve.

The quick-lift hydraulic device further includes a first hydraulic quick-change plug and a second hydraulic quick-change plug, the first hydraulic quick-change plug is arranged on the oil road of the rod cavity; the second hydraulic quick-change plug is arranged on the rodless cavity oil circuit.

The technical advantage of this solution is that the lifting efficiency of the lifting device is greatly improved.

Description of drawings

Figure 1 is a schematic diagram of the pipeline of the present invention.

The reference numbers are as follows:

1——Lifting cylinder, 2——Combination valve block, 3——Oil supply mechanism, 4——Rod cavity oil circuit, 5——Rodless cavity oil circuit.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

A quick lift device includes a lift cylinder 1, a combined valve block 2, a rod chamber oil circuit 4, a rodless chamber oil circuit 5 and an oil supply mechanism 3. The lift cylinder 1 includes a rod chamber and a rodless chamber. The combined valve block 2 includes a one-way stop valve and a two-way stop valve, the oil supply mechanism 3 includes an oil pump and an oil tank, and the oil pump is arranged on the external oil road of the oil tank for pumping oil; In the state: the oil pump is connected with one end of the two-way stop valve through the oil circuit; the oil pump is connected with the rod cavity through the rod cavity oil circuit 4, and the other end of the two-way stop valve passes through the rod cavity. The rodless chamber oil circuit 5 is connected to the rodless chamber; in the descending state: the oil pump is connected to the rod chamber through the rod chamber oil circuit 4, and the rodless chamber is connected to the rodless chamber through the rodless chamber oil circuit 5. The oil inlet end of the one-way stop valve is connected, and the oil outlet end of the one-way stop valve is connected with the oil tank through an oil circuit.

Specifically, the rod chamber oil passage 4 extends from the oil outlet end of the oil pump to the rod chamber and one end of the two-way stop valve, respectively, and the rodless chamber oil passage 5 extends from the rodless chamber The oil passage 5 extends from the rodless cavity to the other end of the two-way stop valve and the oil inlet end of the one-way stop valve, respectively. In the lifting state, the two-way stop valve is in the open state, the one-way stop valve is in the closed state, and the hydraulic oil flows from the mailbox and the rod chamber to the rodless chamber through the oil circuit at the same time. The piston rod of the lifting cylinder 1 is rapidly pushed toward the rod cavity; in the descending state, the two-way stop valve is closed, the one-way stop valve is open, and the hydraulic oil flows from the oil tank to the cylinder. The rod cavity flows, and the hydraulic oil in the rodless cavity flows back into the oil tank through the one-way stop valve. At the same time, when the pressure of the lifted item is too large, the two-way stop valve is closed to prevent the hydraulic oil from flowing back from the rodless cavity to the rod cavity.

Further, the oil circuit between the oil pump and the two-way stop valve and the rod cavity oil circuit 4 are connected to the external oil circuit of the oil outlet end of the oil pump.

Further, the lifting cylinder is provided with one group.

The advantage of this solution is that it is simple to use a set of lift cylinder oil circuit system, which prevents the load from overturning due to inconsistent lifting speeds of multiple sets of cylinders.

Further, there are at least two groups of the lift cylinders 1, the multiple groups of lift cylinders 1 are arranged in parallel, and the quick lift device further includes a multi-channel synchronizer, which is arranged on the On the rod cavity oil circuit 5, the multi-channel synchronizer communicates with the rodless cavity of each of the lifting cylinders 1 through the oil circuit respectively; in the lifting state, the multi-channel synchronizer passes through the rodless cavity oil. The passage 5 is connected with the two-way stop valve; in the descending state, the multi-channel synchronizer is connected with the one-way stop valve through the rodless cavity oil passage 5 .

Specifically, the rod cavity oil circuit 4 is respectively connected to each of the rod chambers through a branch oil circuit. Similarly, the multi-channel synchronizer is also connected to all the rod chambers through an internal branch oil circuit or an external branch oil circuit. The rodless chamber is connected to the oil circuit 5, and each of the rodless chambers is also connected to the multi-channel synchronizer through the oil circuit. The force is obviously unstable. It is very important to set four groups of oil cylinders to drive four groups of piston rods to push the lifting platform up and down. The lifting stroke is inconsistent, resulting in the tilting of the supporting lifting platform.

Further, the oil supply mechanism 3 further includes a one-way valve, and the one-way valve is arranged on the external oil circuit of the oil outlet end of the oil pump.

The advantage of this technical solution is that it prevents the hydraulic oil from being poured back into the oil pump.

Further, the quick lift hydraulic device further includes an overflow valve, the overflow valve includes an overflow valve and an overflow pipeline, the overflow pipeline is arranged at both ends of the overflow valve, and the overflow valve One end of the overflow pipeline is connected to the external oil circuit of the one-way valve outlet, and the other end of the overflow valve is connected to the oil tank.

The advantage of this technical solution is that the hydraulic pressure in the oil circuit is stabilized.

Further, the pipeline between the relief valve pipeline and the one-way stop valve and the oil tank is connected to an external pipeline of the oil tank.

Further, the quick lift hydraulic device further includes a throttle valve, the throttle valve is arranged on the rod chamber oil path 4, and one end of the throttle valve is connected to the rod chamber oil path 4 through the rod chamber oil path 4. In the lifting state, the other end of the throttle valve is connected with the two-way shut-off valve through the rod cavity oil passage 4; in the descending state, the throttle valve The other end of the valve is connected to the inlet of the one-way throttle valve through the rod chamber oil passage 4 .

The advantage of this technical solution is that the hydraulic pressure in the oil circuit is regulated by cooperating with the relief valve.

The quick-lift hydraulic device also includes a first hydraulic quick-change plug and a second hydraulic quick-change plug, the first hydraulic quick-change plug is arranged on the rod cavity oil passage 4; the second hydraulic quick-change plug The plug is arranged on the rodless cavity oil passage 5 .

Specifically, in conventional use, the lift cylinder 1, the oil supply mechanism 3 and the combined valve block 2 are often disassembled for reasons such as maintenance, equipment replacement, equipment movement, etc. The advantage of this technical solution is that in the fast When the lifting hydraulic device needs to be separated for a short time, there is no need to drain the hydraulic oil, which simplifies the operation.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. Substitutions should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (8)

1. A fast lifting device is characterized in that: comprising a lifting oil cylinder, a combined valve block, a rod chamber oil circuit, a rodless chamber oil circuit, an oil supply mechanism, a first throttle valve, a second throttle valve and A multi-channel synchronizer, the lift cylinder includes a rod cavity and a rodless cavity, the combined valve block includes a one-way stop valve and a two-way stop valve, the oil supply mechanism includes an oil pump and an oil tank, and the oil pump is arranged at the The external oil circuit of the oil tank is used for pumping oil; the first throttle valve is arranged on the oil road of the rod cavity and communicates with the rod cavity, and the second throttle valve is arranged on the oil road of the rodless cavity and is connected to the rod cavity. communicating with the collection pipeline of the multi-channel synchronizer; In the lifting state: the oil pump is connected to the rod chamber through the rod chamber oil circuit and the first throttle valve, and the oil pump is connected to one end of the two-way stop valve through the oil circuit; The other end of the globe valve is connected with the rodless cavity through the rodless cavity oil circuit, the second throttle valve and the multi-channel synchronizer; In the descending state: the oil pump is connected to the rod chamber through the rod chamber oil circuit; the rodless chamber is connected to the one-way cut-off through the multi-channel synchronizer, the second throttle valve, and the rodless chamber oil circuit The oil inlet end of the valve is connected, and the oil outlet end of the one-way stop valve is connected with the oil tank through an oil circuit. 2 . The quick lift device according to claim 1 , wherein the oil circuit between the oil pump and the two-way stop valve and the rod cavity oil circuit are connected to the oil outlet end of the oil pump. 3 . External oil road. 3 . The fast lifting device according to claim 2 , wherein the lifting cylinder is provided with one group. 4 . 4 . The quick lift device according to claim 2 , wherein at least two groups of the lift cylinders are arranged, and the two groups of lift cylinders are arranged in parallel. 5 . 5. A quick lift device according to any one of claims 1 to 4, wherein the oil supply mechanism further comprises a one-way valve, and the one-way valve is arranged at an external connection of the oil outlet end of the oil pump On the oil road. 6 . The quick lift device according to claim 5 , wherein the quick lift device further comprises an overflow valve, the overflow valve comprises an overflow valve and an overflow pipeline, and the overflow valve 6 . The flow pipeline is arranged at both ends of the overflow valve, one end of the overflow pipeline is connected to the external oil circuit of the one-way valve outlet, and the other end of the overflow valve is connected to the oil tank. 7. A quick lift device according to claim 6, characterized in that: the pipeline between the overflow pipeline, the one-way stop valve and the oil tank is connected to the outer pipe of the oil tank on the way. 8 . The quick lift device according to claim 1 , wherein the quick lift device further comprises a first hydraulic quick-change plug and a second hydraulic quick-change plug, the first hydraulic quick-change plug. 9 . A hydraulic quick-change plug is arranged on the oil circuit of the rod chamber; the second hydraulic quick-change plug is arranged on the oil circuit of the rodless chamber.

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