阅读说明：本技术 一种基于同步伸缩多级缸和蓄能器的高速液压起竖机构 (High-speed hydraulic erecting mechanism based on synchronous telescopic multistage cylinder and energy accumulator ) 是由 杨必武 王旭 陈文学 于 2020-11-24 设计创作，主要内容包括：本发明公开了一种基于同步伸缩多级缸和蓄能器的高速液压起竖机构,包括：同步伸缩多级缸、蓄能器、电机泵组、开关阀Ⅰ和开关阀Ⅱ；所述电机泵组与蓄能器相连,用于为蓄能器充油蓄能；所述蓄能器通过开关阀Ⅱ与同步伸缩多级缸的无杆腔连通,同步伸缩多级缸的有杆腔通过开关阀Ⅰ与油箱连通；所述蓄能器中的油液经过开关阀Ⅱ进入同步伸缩多级缸的无杆腔,同步伸缩多级缸的有杆腔中的油液经过开关阀Ⅰ回到油箱,使同步伸缩多级缸高速伸出,从而实现高速液压起竖。(The invention discloses a high-speed hydraulic erecting mechanism based on a synchronous telescopic multistage cylinder and an energy accumulator, which comprises: the system comprises a synchronous telescopic multistage cylinder, an energy accumulator, a motor pump set, a switch valve I and a switch valve II; the motor pump group is connected with the energy accumulator and is used for charging oil and storing energy for the energy accumulator; the energy accumulator is communicated with a rodless cavity of the synchronous telescopic multi-stage cylinder through a switch valve II, and a rod cavity of the synchronous telescopic multi-stage cylinder is communicated with the oil tank through a switch valve I; oil in the energy accumulator enters a rodless cavity of the synchronous telescopic multi-stage cylinder through the switch valve II, and the oil in a rod cavity of the synchronous telescopic multi-stage cylinder returns to an oil tank through the switch valve I, so that the synchronous telescopic multi-stage cylinder stretches out at a high speed, and high-speed hydraulic erection is realized.)

1. The utility model provides a high-speed hydraulic pressure erects mechanism based on synchronous flexible multistage jar and energy storage ware which characterized in that includes: the system comprises a synchronous telescopic multi-stage cylinder (6), an energy accumulator (9), a motor pump set (17), a switch valve I and a switch valve II;

the motor pump set (17) is connected with the energy accumulator (9) and is used for charging oil and storing energy for the energy accumulator (9); the energy accumulator (9) is communicated with a rodless cavity of the synchronous telescopic multi-stage cylinder (6) through a switch valve II, and a rod cavity of the synchronous telescopic multi-stage cylinder (6) is communicated with an oil tank through a switch valve I;

oil in the energy accumulator (9) enters a rodless cavity of the synchronous telescopic multi-stage cylinder (6) through the switch valve II, and the oil in a rod cavity of the synchronous telescopic multi-stage cylinder (6) returns to an oil tank through the switch valve I, so that the synchronous telescopic multi-stage cylinder (6) stretches out at a high speed, and high-speed hydraulic erection is realized.

2. The high-speed hydraulic erecting mechanism based on synchronous telescopic multistage cylinder and accumulator according to claim 1, further comprising: the check valve (1) is arranged at the outlet of the motor-pump set (17).

3. The high-speed hydraulic erecting mechanism based on synchronous telescopic multistage cylinder and accumulator according to claim 2, further comprising: the overflow valve II (14), the two-way valve VII (15), the two-way valve V (11) and the two-way valve II (3);

an overflow valve II (14) and a two-way valve VII (15) are arranged on a pipeline between the outlet end of the one-way valve (1) and the oil tank, the overflow valve II (14) and the two-way valve VII (15) are connected in parallel, the overflow valve II (14) is used for controlling the pressure of the system, the two-way valve VII (15) is used as a system loading valve, the system loading is realized when the power is on, and the system unloading is realized when the power is off; the two-way valve V (11) is arranged on a pipeline between a rodless cavity of the synchronous telescopic multi-stage cylinder (6) and the oil tank, and the two-way valve II (3) is arranged on a pipeline between a rod cavity of the synchronous telescopic multi-stage cylinder (6) and the one-way valve (1);

the motor pump set (17) is started, the two-way valve VII (15) is electrified, the system is pressed, then the two-way valve V (11) and the two-way valve II (3) are both electrified, oil enters a rod cavity of the synchronous telescopic multistage cylinder (6) from the oil tank sequentially through the motor pump set (17) and the two-way valve II (3), the oil in a rodless cavity of the synchronous telescopic multistage cylinder (6) returns to the oil tank through the two-way valve V (11), the synchronous telescopic multistage cylinder (6) retracts, and hydraulic leveling can be achieved.

4. The high-speed hydraulic erecting mechanism based on synchronous telescopic multistage cylinder and accumulator according to claim 3, further comprising: and the two-way valve III (4) is arranged on a pipeline between the energy accumulator (9) and the one-way valve (1) and is used for controlling the on-off of a charging pipeline of the energy accumulator (9), the two-way valve III (4) is opened, and the motor pump set (17) can absorb oil from the oil tank so as to charge the energy accumulator (9) with oil.

5. The high-speed hydraulic erecting mechanism based on synchronous telescopic multistage cylinder and accumulator according to claim 1, further comprising: a throttle valve (8); and the throttle valve (8) is arranged on a pipeline between the switch valve II and the rodless cavity of the synchronous telescopic multi-stage cylinder (6) and is used for adjusting the running speed of the synchronous telescopic multi-stage cylinder (6).

6. The high-speed hydraulic erecting mechanism based on synchronous telescopic multistage cylinder and accumulator as recited in claim 5, further comprising: a balance valve II (7); and the balance valve II (7) is arranged on a pipeline between the throttle valve (8) and a rodless cavity of the synchronous telescopic multi-stage cylinder (6) and is used for adjusting the running speed of the synchronous telescopic multi-stage cylinder (6).

7. The high-speed hydraulic erecting mechanism based on the synchronous telescopic multistage cylinder and the accumulator according to claim 1 or 6, further comprising: a balance valve I (5); the balance valve I (5) is arranged on a pipeline between the switching valve I and a rod cavity of the synchronous telescopic multi-stage cylinder (6) and used for adjusting the running speed of the synchronous telescopic multi-stage cylinder (6).

8. The high-speed hydraulic erecting mechanism based on synchronous telescopic multistage cylinder and accumulator according to claim 1, further comprising: and the oil suction filter (16) is arranged between the oil suction port of the motor-pump set (17) and the oil tank.

9. The high-speed hydraulic erecting mechanism based on synchronous telescopic multistage cylinder and accumulator according to claim 1, further comprising: the two-way valve VI (12) and the overflow valve I (13) are arranged on a pipeline between the outlet of the energy accumulator (9) and the oil tank in parallel; the two-way valve VI (12) is used as an unloading valve of the energy accumulator (9), and oil liquid in the energy accumulator (9) can be released to an oil tank by electrifying the two-way valve VI; the relief valve I (13) is used as a safety valve of the accumulator (9) and can control the pressure in the accumulator (9) within a set range.

10. The high-speed hydraulic erecting mechanism based on the synchronous telescopic multistage cylinder and the energy accumulator as claimed in claim 1, wherein the switch valve I is a two-way valve I (2), and the switch valve II is a two-way valve IV (10).

Technical Field

The invention relates to the technical field of hydraulic pressure, in particular to a high-speed hydraulic erecting mechanism based on a synchronous telescopic multistage cylinder and an energy accumulator.

Background

In the occasion that a multi-stage cylinder is needed to erect an object from a horizontal position to an upright state, the common mode of the system adopts a motor-pump set to directly supply oil to a common multi-stage hydraulic cylinder.

The common multistage hydraulic cylinder has the advantages that each stage of cylinder is of a parallel structure, a rod cavity and a rodless cavity of each stage of cylinder are respectively communicated, each stage of cylinder sequentially extends out in practical application, and due to the fact that the piston areas of each stage of cylinder are different, when the cylinders are switched under the condition that loads are not changed, pressure and flow of a system are suddenly changed, and stage-changing impact is formed; moreover, the operation speed of the multi-stage cylinder is reduced by the stage change stopping and the re-acceleration of each stage of cylinder. In the case of low-speed motion with small load, the impact and the speed are not obvious and are often allowed to be used. However, when a large-load long object needs to be erected at a high speed, the erecting mode of the motor-pump set and the common multi-stage hydraulic cylinder has the technical problems of large stage-changing impact, low speed, high power of the motor-pump set, low response speed, high energy consumption, heavy equipment and high manufacturing and operating cost.

The drawbacks of the prior art are specifically summarized as follows:

1. in the process of pushing a large load object to extend out at a high speed, the stop of the common multi-stage cylinder during stage change can cause the kinetic energy of the high-speed motion of the large load object to generate huge impact, and the large load object cannot be borne by the multi-stage cylinder, the whole erecting equipment or the load object, or even can cause major accidents.

2. When the multistage cylinder moves at a high speed, a very large high-pressure oil flow is needed instantly, a motor pump set is used for supplying oil, a plurality of high-pressure large-flow hydraulic pumps and high-power motors are needed, the equipment is large and heavy, and the manufacturing cost is too high; even so, because the response speed of motor-pump package is too slow, need to operate in advance and build the pressure, this will cause system heating and a large amount of energy waste.

3. When the common multi-stage cylinder extends out, because the areas of the pistons of all stages of the multi-stage cylinder are sequentially reduced, when the last stage (the stage with the smallest piston area) of the multi-stage cylinder extends out, higher hydraulic oil pressure is needed; however, during the process of releasing the pressure oil of the accumulator, the pressure of the hydraulic oil is gradually reduced, and the pressure of the accumulator is minimized when the final stage of the multi-stage cylinder extends. To solve this conflict, only the measures of increasing the volume of the energy accumulator or using multiple groups of energy accumulators can be taken. This would greatly increase system size, control difficulty, and manufacturing costs. Therefore, the common multi-stage cylinder is not suitable for the accumulator oil supply mode.

Disclosure of Invention

In view of the above, the invention provides a high-speed hydraulic erecting mechanism based on a synchronous telescopic multi-stage cylinder and an energy accumulator, wherein a motor pump set is adopted to charge the energy accumulator in advance for energy storage, and the energy accumulator can instantly provide super-large-flow high-pressure hydraulic oil for the high-speed operation of the synchronous telescopic multi-stage cylinder, so that the technical problem of high-speed erecting of a large-load long object is solved.

The technical scheme of the invention is as follows: a high-speed hydraulic erecting mechanism based on synchronous telescopic multistage cylinders and an energy accumulator comprises: the system comprises a synchronous telescopic multistage cylinder, an energy accumulator, a motor pump set, a switch valve I and a switch valve II;

the motor pump group is connected with the energy accumulator and is used for charging oil and storing energy for the energy accumulator; the energy accumulator is communicated with a rodless cavity of the synchronous telescopic multi-stage cylinder through a switch valve II, and a rod cavity of the synchronous telescopic multi-stage cylinder is communicated with the oil tank through a switch valve I;

oil in the energy accumulator enters a rodless cavity of the synchronous telescopic multi-stage cylinder through the switch valve II, and the oil in a rod cavity of the synchronous telescopic multi-stage cylinder returns to an oil tank through the switch valve I, so that the synchronous telescopic multi-stage cylinder stretches out at a high speed, and high-speed hydraulic erection is realized.

Preferably, the method further comprises the following steps: and the one-way valve is arranged at the outlet of the motor-pump set.

Preferably, the method further comprises the following steps: the overflow valve II, the two-way valve VII, the two-way valve V and the two-way valve II;

an overflow valve II and a two-way valve VII are arranged on a pipeline between the outlet end of the one-way valve and the oil tank, the overflow valve II is connected with the two-way valve VII in parallel, the overflow valve II is used for controlling the system pressure, the two-way valve VII is used as a system loading valve, the system loading is realized by electrifying, and the system unloading is realized by powering off; the two-way valve V is arranged on a pipeline between a rodless cavity of the synchronous telescopic multi-stage cylinder and the oil tank, and the two-way valve II is arranged on a pipeline between a rod cavity of the synchronous telescopic multi-stage cylinder and the one-way valve;

and starting the motor pump set, electrifying the two-way valve VII, establishing pressure in the system, then electrifying the two-way valve V and the two-way valve II, enabling oil to sequentially pass through the motor pump set and the two-way valve II from the oil tank to enter the rod cavity of the synchronous telescopic multistage cylinder, and enabling the oil in the rodless cavity of the synchronous telescopic multistage cylinder to return to the oil tank through the two-way valve V, so that the synchronous telescopic multistage cylinder retracts, and hydraulic leveling can be realized.

Preferably, the method further comprises the following steps: and the two-way valve III is arranged on a pipeline between the energy accumulator and the one-way valve and used for controlling the on-off of an oil charging pipeline of the energy accumulator, the two-way valve III is opened, and the motor pump set can absorb oil from the oil tank so as to charge the energy accumulator with oil.

Preferably, the method further comprises the following steps: a throttle valve; the throttle valve is arranged on a pipeline between the switch valve II and the rodless cavity of the synchronous telescopic multi-stage cylinder and used for adjusting the running speed of the synchronous telescopic multi-stage cylinder.

Preferably, the method further comprises the following steps: a balance valve II; and the balance valve II is arranged on a pipeline between the throttle valve and the rodless cavity of the synchronous telescopic multi-stage cylinder and is used for adjusting the running speed of the synchronous telescopic multi-stage cylinder.

Preferably, the method further comprises the following steps: a balance valve I; the balance valve I is arranged on a pipeline between the switch valve I and a rod cavity of the synchronous telescopic multi-stage cylinder and used for adjusting the running speed of the synchronous telescopic multi-stage cylinder.

Preferably, the method further comprises the following steps: and the oil suction and oil filter is arranged between the oil suction port of the motor-pump set and the oil tank.

Preferably, the method further comprises the following steps: the pipeline between the outlet of the energy accumulator and the oil tank is provided with the two-way valve VI and the overflow valve I in parallel; the two-way valve VI is used as an energy accumulator unloading valve, and oil liquid in the energy accumulator can be released to an oil tank by electrifying the two-way valve VI; the overflow valve I is used as a safety valve of the energy accumulator and can control the pressure in the energy accumulator within a set range.

Preferably, the switch valve I is a two-way valve I, and the switch valve II is a two-way valve IV.

Has the advantages that:

1. compared with the conventional common multi-stage cylinder, the high-speed hydraulic erecting mechanism has large stage-changing impact and low speed, and can realize high-speed stable motion without stage-changing impact by utilizing the synchronous telescopic multi-stage hydraulic cylinder; meanwhile, in the prior art, the motor-pump set directly supplies energy, the motor-pump set needs high power, consumes much energy, has large volume and weight, and causes high manufacturing and operating cost; the existing motor-pump set has low oil supply response speed, needs to be started in advance, has long preparation time and consumes much energy; the accumulator can quickly respond and instantly provides ultrahigh-flow high-pressure hydraulic oil for the synchronous telescopic multi-stage cylinder; in addition, when the multistage synchronous telescopic hydraulic cylinder extends out, oil is only needed to be supplied to the rodless cavity of the first-stage cylinder, and the load force is gradually reduced in the erecting process, so that the required hydraulic oil pressure is also gradually reduced and is just matched with the trend of the oil supply pressure of the energy accumulator, the stored energy of the energy accumulator can be fully utilized, the size of the energy accumulator is reduced, the weight is reduced, and the manufacturing cost is reduced.

2. The high-speed hydraulic erecting mechanism can also stably level back.

Drawings

Fig. 1 is a schematic structural diagram of a high-speed hydraulic erecting mechanism of the invention.

The system comprises a 1-one-way valve, a 2-two-way valve I, a 3-two-way valve II, a 4-two-way valve III, a 5-balance valve I, a 6-synchronous telescopic multi-stage cylinder, a 7-balance valve II, a 8-throttling valve, a 9-energy accumulator, a 10-two-way valve IV, a 11-two-way valve V, a 12-two-way valve VI, a 13-overflow valve I, a 14-overflow valve II, a 15-two-way valve VII, a 16-oil absorption oil filter and a 17-motor pump set.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The embodiment provides a high-speed hydraulic erecting mechanism based on a synchronous telescopic multi-stage cylinder and an energy accumulator, wherein a motor pump set is adopted to charge oil for the energy accumulator in advance for energy storage, and the energy accumulator can instantly provide super-large-flow high-pressure hydraulic oil for the high-speed operation of the synchronous telescopic multi-stage cylinder, so that the technical problem of high-speed erecting of a large-load long object is solved.

As shown in fig. 1, the high-speed hydraulic erecting mechanism includes: the system comprises a one-way valve 1, a two-way valve I2, a two-way valve II 3, a two-way valve III 4, a balance valve I5, a synchronous telescopic multi-stage cylinder 6, a balance valve II 7, a throttle valve 8, an energy accumulator 9, a two-way valve IV 10, a two-way valve V11, a two-way valve VI 12, an overflow valve I13, an overflow valve II 14, a two-way valve VII 15, an oil absorption oil filter 16 and a motor pump set 17.

The connection relationship of the high-speed hydraulic erecting mechanism is as follows: an oil suction port of the motor-pump set 17 is communicated with the oil tank (an oil suction filter 16 is arranged on a pipeline between the oil suction port and the oil tank), and a one-way valve 1 is arranged at an outlet (namely, the inlet end of the one-way valve 1 is connected with an outlet of the motor-pump set 17);

an overflow valve II 14 and a two-way valve VII 15 are arranged on a pipeline between the outlet end of the one-way valve 1 and the oil tank, the overflow valve II 14 and the two-way valve VII 15 are connected in parallel, the overflow valve II 14 is used for controlling system pressure, the two-way valve VII 15 is used as a system loading valve, the system loading is realized by electrifying, and the system unloading is realized by powering off;

a two-way valve VI 12 and an overflow valve I13 are arranged on a pipeline between the outlet of the energy accumulator 9 and the oil tank in parallel; the two-way valve VI 12 serves as an unloading valve of the energy accumulator 9, and oil liquid in the energy accumulator 9 can be released to an oil tank by electrifying the two-way valve VI 12; the overflow valve I13 is used as a safety valve of the energy accumulator 9 and is used for preventing the pressure in the energy accumulator 9 from being too high; a two-way valve IV 10 is arranged on a pipeline between the outlet of the energy accumulator 9 and the synchronous telescopic multi-stage cylinder 6, and the two-way valve IV 10 is used as a switch valve for switching on or off the pipeline between the energy accumulator 9 and the synchronous telescopic multi-stage cylinder 6; a throttle valve 8 is arranged on a pipeline between the two-way valve IV 10 and the synchronous telescopic multi-stage cylinder 6, and the throttle valve 8 is used for adjusting the running speed of the synchronous telescopic multi-stage cylinder 6; the two-way valve III 4 is arranged on a pipeline between the energy accumulator 9 and the one-way valve 1 at the outlet of the motor pump set 17 and used for controlling the on-off of an oil charging pipeline of the energy accumulator 9, the two-way valve III 4 is opened, and the motor pump set 17 can absorb oil from an oil tank so as to charge the energy accumulator 9 with oil;

the front cavity oil port and the rear cavity oil port of the synchronous telescopic multi-stage cylinder 6 are respectively communicated with an oil tank, a balance valve I5 and a balance valve II 7 are respectively arranged on a pipeline between the front cavity oil port and the rear cavity oil port of the synchronous telescopic multi-stage cylinder 6 and the oil tank and used for stabilizing the running speed of the synchronous telescopic multi-stage cylinder 6, a two-way valve I2 is arranged on the pipeline behind the balance valve I5, a two-way valve V11 is also arranged on the pipeline behind the balance valve II 7, the two-way valve I2 and the two-way valve V11 are respectively used as unloading valves between the front cavity and the rear cavity of the synchronous telescopic multi-stage cylinder 6 and the oil tank, and oil liquid in the synchronous; a two-way valve II 3 is arranged on a pipeline communicated between the balance valve I5 and the one-way valve 1, and the two-way valve II 3 is communicated with the front cavity of the synchronous telescopic multi-stage cylinder 6 and the one-way valve 1 at the outlet of the motor pump set 17 and is used for controlling oil to enter the front cavity of the synchronous telescopic multi-stage cylinder 6.

The working principle of the high-speed hydraulic erecting mechanism is as follows: the energy accumulator 9 accumulates energy: starting a motor-pump set 17, electrifying a two-way valve VII 15, building pressure in a system, electrifying a two-way valve III 4, electrifying the other valves, allowing oil to sequentially pass through an oil suction oil filter 16, the motor-pump set 17, a one-way valve 1 and the two-way valve III 4 from an oil tank and enter an energy accumulator 9, and when the pressure of the oil in the energy accumulator 9 reaches a set pressure, powering off the two-way valve III 4, the two-way valve VII 15 and the motor-pump set 17; the overflow valve I13 is a safety valve of the energy accumulator 9, and can prevent the pressure in the energy accumulator 9 from being too high; the two-way valve VI 12 is an unloading valve of the energy accumulator 9;

the two-way valve IV 10 and the two-way valve I2 are powered on, oil enters a rodless cavity of the synchronous telescopic multi-stage cylinder 6 from the energy accumulator 9 through the two-way valve IV 10, the throttle valve 8 and the balance valve II 7 in sequence, and the oil in a rod cavity of the synchronous telescopic multi-stage cylinder 6 returns to an oil tank through the balance valve I5 and the two-way valve I2 in sequence, so that the synchronous telescopic multi-stage cylinder 6 extends out at a high speed, and high-speed hydraulic erection is realized;

the motor-pump set 17 is started, the two-way valve VII 15 is electrified, the system is pressurized, then the two-way valve V11 and the two-way valve II 3 are electrified, oil sequentially passes through the oil suction oil filter 16, the motor-pump set 17, the one-way valve 1, the two-way valve II 3 and the balance valve I5 from the oil tank to enter the rod cavity of the synchronous telescopic multi-stage cylinder 6, and the oil in the rodless cavity of the synchronous telescopic multi-stage cylinder 6 sequentially passes through the balance valve II 7 and the two-way valve V11 to return to the oil tank, so that the synchronous telescopic multi-stage cylinder 6 retracts, and hydraulic leveling is achieved.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.