阅读说明：本技术 垃圾车双泵局部合流系统 (Double-pump local confluence system of garbage truck ) 是由 吴强斌 叶文海 邹震 范林生 郑文标 于 2020-06-30 设计创作，主要内容包括：本发明公开了垃圾车双泵局部合流系统,包括：液压油箱；双联齿轮泵,输入端与液压油箱管路连接,包括第一齿轮泵和第二齿轮泵；多路阀,包括控制阀Ⅰ、控制阀Ⅱ、控制阀Ⅲ、控制阀Ⅳ和控制阀Ⅴ,第一齿轮泵的输出端通过与控制阀Ⅰ、控制阀Ⅱ、控制阀Ⅲ和控制阀Ⅳ的进油口P1连接,第二齿轮泵的输出端与控制阀Ⅴ的进油口P2连接,控制阀Ⅰ、控制阀Ⅱ、控制阀Ⅲ和控制阀Ⅳ还设有回油管路a并连接至液压油箱,控制阀Ⅴ还设有回油管路b2且连接至控制阀Ⅱ和控制阀Ⅲ之间的进油管路上；以及分别与控制阀Ⅰ、控制阀Ⅱ、控制阀Ⅲ、控制阀Ⅳ和控制阀Ⅴ连接的填料器油缸、推板油缸、刮板油缸、滑板油缸和提升油缸,该方案实施效率高且安全可靠。(The invention discloses a double-pump local confluence system of a garbage truck, which comprises: a hydraulic oil tank; the input end of the double gear pump is connected with a hydraulic oil tank pipeline and comprises a first gear pump and a second gear pump; the multi-way valve comprises a control valve I, a control valve II, a control valve III, a control valve IV and a control valve V, wherein the output end of a first gear pump is connected with oil inlets P1 of the control valve I, the control valve II, the control valve III and the control valve IV, the output end of a second gear pump is connected with an oil inlet P2 of the control valve V, the control valve I, the control valve II, the control valve III and the control valve IV are further provided with oil return pipelines a and connected to a hydraulic oil tank, and the control valve V is further provided with oil return pipelines b2 and connected to an oil inlet pipeline between the control valve II and the control valve III; and the filler oil cylinder, the push plate oil cylinder, the scraper oil cylinder, the sliding plate oil cylinder and the lifting oil cylinder are respectively connected with the control valve I, the control valve II, the control valve III, the control valve IV and the control valve V.)

1. Two pump local confluence systems of garbage truck, its characterized in that: it includes:

the hydraulic oil tank is used for providing hydraulic oil;

the input end of the double gear pump is connected with a hydraulic oil tank pipeline and comprises a first gear pump and a second gear pump;

the multi-way valve comprises a control valve I, a control valve II, a control valve III, a control valve IV and a control valve V, wherein the output end of the first gear pump is sequentially connected with oil inlet P1 pipelines of the control valve I, the control valve II, the control valve III and the control valve IV through oil inlet pipelines, the output end of the second gear pump is connected with an oil inlet P2 pipeline of the control valve V, oil return pipelines a are further arranged on the control valve I, the control valve II, the control valve III and the control valve IV and connected to a hydraulic oil tank, an oil return pipeline b2 is further arranged on the control valve V, and the oil return pipeline b2 is connected to the oil inlet pipeline between the control valve II and the control valve III through an oil return pipeline b 1;

a rod cavity of the filler oil cylinder is connected with an oil port B1 of the control valve I through a pipeline, and a rodless cavity of the filler oil cylinder is connected with an oil port A1 of the control valve I through a pipeline;

a rod cavity of the push plate oil cylinder is connected with an oil port B2 of the control valve II through a pipeline, and a rodless cavity of the push plate oil cylinder is connected with an oil port A2 of the control valve II through a pipeline;

the rod cavity of the scraper oil cylinder is connected with an oil port B3 of the control valve III through a pipeline, and the rodless cavity of the scraper oil cylinder is connected with an oil port A3 of the control valve III through a pipeline;

a rod cavity of the slide plate oil cylinder is connected with an oil port B4 of the control valve IV through a pipeline, and a rodless cavity of the slide plate oil cylinder is connected with an oil port A4 of the control valve IV through a pipeline;

and a rod cavity of the lifting oil cylinder is connected with an oil port B5 of the control valve V through a pipeline, and a rodless cavity of the lifting oil cylinder is connected with an oil port A5 of the control valve V through a pipeline.

2. The garbage truck dual-pump local confluence system of claim 1, wherein: and the control valve I, the control valve II, the control valve III and the control valve IV are all connected with a first overflow valve.

3. The garbage truck dual-pump local confluence system of claim 2, wherein: and the control valve V is also connected with a second overflow valve.

4. The garbage truck dual-pump local confluence system of claim 3, wherein: and the first overflow valve and the second overflow valve are both connected to an oil return pipeline a through pipelines.

5. The garbage truck dual-pump local confluence system of claim 4, wherein: and an oil return filter is also arranged at the end part of the oil return pipeline a connected to the hydraulic oil tank.

6. The garbage truck dual-pump local confluence system of claim 5, wherein: and a confluence one-way valve is also arranged on the oil return pipeline b 2.

7. The garbage truck dual-pump local confluence system of claim 1, wherein: and an oil suction filter is also arranged on a pipeline of the duplex gear pump connected to the hydraulic oil tank.

Technical Field

The invention relates to the field of hydraulic systems of garbage trucks, in particular to a double-pump local confluence system of a garbage truck.

Background

The compression garbage truck is a special urban sanitation vehicle for efficiently collecting and transferring garbage, and has outstanding contribution to improvement of urban environmental sanitation. The upper assembling operation device mainly comprises a scraper plate, a sliding plate, a push plate, a filling device, a lifting mechanism and the like, and is driven by a hydraulic system.

At present, for the loading efficiency who promotes rubbish, the double pump system is adopted usually to mainstream compression car on the market, and hoist mechanism and compressing mechanism move simultaneously when realizing loading operation. Furthermore, a part of compression vehicles also adopt a double-pump confluence system, but the current double-pump confluence system converges the flow of a small pump at the oil inlet of a large pump, namely all actions controlled by the large pump system form confluence, including push plate actions and filling device actions except loading actions. Although the system realizes high-speed operation of the scraper and the sliding plate under the confluence condition during loading, the system also causes the problems of long-time overflow heating of the push plate and the filling device under the confluence condition and safety of high-speed action of the filling device.

Disclosure of Invention

In view of the situation of the prior art, the invention aims to provide a garbage truck double-pump local converging system which is safe, reliable, flexible to implement and efficient.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

local confluence system of garbage truck dual pump, it includes:

the hydraulic oil tank is used for providing hydraulic oil;

the input end of the double gear pump is connected with a hydraulic oil tank pipeline and comprises a first gear pump and a second gear pump;

the multi-way valve comprises a control valve I, a control valve II, a control valve III, a control valve IV and a control valve V, wherein the control valve I, the control valve II, the control valve III and the control valve IV are mutually connected in series and input hydraulic oil through an oil inlet P1, the output end of the first gear pump is sequentially connected with oil inlets P1 of the control valve I, the control valve II, the control valve III and the control valve IV through oil inlet pipelines, the output end of the second gear pump is connected with an oil inlet P2 pipeline of the control valve V, the control valve I, the control valve II, the control valve III and the control valve IV are further provided with oil return pipelines a and connected to a hydraulic oil tank, the control valve V is further provided with an oil return pipeline b2, and the oil return pipeline b2 is connected to the oil inlet pipeline between the control valve II and the control valve III through an oil return pipeline b 1;

a rod cavity of the filler oil cylinder is connected with an oil port B1 of the control valve I through a pipeline, and a rodless cavity of the filler oil cylinder is connected with an oil port A1 of the control valve I through a pipeline;

a rod cavity of the push plate oil cylinder is connected with an oil port B2 of the control valve II through a pipeline, and a rodless cavity of the push plate oil cylinder is connected with an oil port A2 of the control valve II through a pipeline;

the rod cavity of the scraper oil cylinder is connected with an oil port B3 of the control valve III through a pipeline, and the rodless cavity of the scraper oil cylinder is connected with an oil port A3 of the control valve III through a pipeline;

a rod cavity of the slide plate oil cylinder is connected with an oil port B4 of the control valve IV through a pipeline, and a rodless cavity of the slide plate oil cylinder is connected with an oil port A4 of the control valve IV through a pipeline;

and a rod cavity of the lifting oil cylinder is connected with an oil port B5 of the control valve V through a pipeline, and a rodless cavity of the lifting oil cylinder is connected with an oil port A5 of the control valve V through a pipeline.

As a possible implementation mode, further, the control valve i, the control valve ii, the control valve iii and the control valve iv are all connected with a first overflow valve.

As a preferred implementation option, the control valve v is preferably further connected to a second relief valve.

As a preferred implementation option, preferably, the first relief valve and the second relief valve are both connected to the oil return line a through a pipeline.

As a preferred embodiment, a return oil filter is preferably also provided at the end of the return line a connected to the hydraulic tank.

As a preferred implementation option, it is preferable that a confluence check valve is further provided on the return line b 2.

As a possible implementation mode, further, an oil suction oil filter is arranged on a pipeline of the duplicate gear pump connected to the hydraulic oil tank.

By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that: the scheme aims to solve the problem of high-speed operation of the compression vehicle under confluence and avoid negative effects caused by a confluence system through a local confluence design; the system is different from a conventional confluence system, the confluence position is designed at the middle position of a control valve set controlled by a first gear pump (namely, an oil inlet pipeline between a control valve II and a control valve III), only confluence operation of a scraper and a sliding plate is realized, a push plate and a filler still keep the state of single-pump oil supply, and the overflow heating and action safety problems of the system are avoided.

Drawings

The invention will be further explained with reference to the drawings and the detailed description below:

fig. 1 is a schematic system connection diagram of the solution of the present invention.

Detailed Description

As shown in fig. 1, the garbage truck dual-pump local confluence system of the present invention comprises:

the hydraulic oil tank 1 is used for providing hydraulic oil;

the input end of the double gear pump 4 is connected with the hydraulic oil tank 1 through a pipeline and comprises a first gear pump 401 and a second gear pump 402;

the multi-way valve 5 comprises a control valve I502, a control valve II 503, a control valve III 504, a control valve IV 505 and a control valve V506, wherein the control valve I502, the control valve II 503, the control valve III 504 and the control valve IV 505 are mutually connected in series and hydraulic oil is input through an oil inlet P1, the output end of the first gear pump 401 is sequentially connected with oil inlets P1 of the control valve I502, the control valve II 503, the control valve III 504 and the control valve IV 505 through oil inlet pipelines, the output end of the second gear pump 402 is connected with an oil inlet P2 pipeline of the control valve V506, the control valve I502, the control valve 503 II, the control valve III 504 and the control valve IV 505 are further provided with an oil return pipeline a and connected to a hydraulic oil tank, the control valve V506 is further provided with an oil return pipeline b2, and the oil return pipeline b2 is connected to an oil inlet pipeline between the control valve II 503 and the control valve V504 through an oil return pipeline b1, as a better implementation option, preferably, the return line b2 is further provided with a confluence check valve 508;

a rod cavity of the filler oil cylinder 601 is connected with an oil port B1 of the control valve I through a pipeline, and a rodless cavity of the filler oil cylinder is connected with an oil port A1 of the control valve I through a pipeline;

a rod cavity of the push plate oil cylinder 602 is connected with an oil port B2 of the control valve II through a pipeline, and a rodless cavity of the push plate oil cylinder is connected with an oil port A2 of the control valve II through a pipeline;

the rod cavity of the scraper oil cylinder 603 is connected with an oil port B3 of the control valve III through a pipeline, and the rodless cavity of the scraper oil cylinder is connected with an oil port A3 of the control valve III through a pipeline;

the slide plate oil cylinder 604 is provided with a rod cavity connected with the oil port B4 of the control valve IV through a pipeline, and a rodless cavity connected with the oil port A4 of the control valve IV through a pipeline;

and a rod cavity of the lifting oil cylinder 605 is connected with the oil port B5 of the control valve V through a pipeline, and a rodless cavity of the lifting oil cylinder is connected with the oil port A5 of the control valve V through a pipeline.

Wherein the packer cylinder 601, the push plate cylinder 602, the scraper cylinder 603, the slide plate cylinder 604 and the lift cylinder 605 form a cylinder group 6.

As a possible implementation manner, further, the control valve i 502, the control valve ii 503, the control valve iii 504 and the control valve iv 505 are all connected with a first overflow valve 501; as a better implementation option, preferably, the control valve v 506 is further connected with a second overflow valve 507; as a preferred implementation option, it is preferable that the first overflow valve 501 and the second overflow valve 507 are both connected to the oil return line a through a pipeline.

In addition, as a preferred implementation option, it is preferable that a return oil filter 7 is further provided at the end of the return line a connected to the hydraulic oil tank 1; as a possible embodiment, further, the pipeline of the double gear pump 4 connected to the hydraulic oil tank 1 is also provided with an oil suction filter 2.

In the scheme, the first gear pump 401 and the second gear pump 402 respectively supply oil to two independent systems (namely, a control system formed by a control valve I502, a control valve II 503, a control valve III 504 and a control valve IV 505 and a control system formed by a control valve V independently), so that the scraper oil cylinder 603 and the lifting oil cylinder 605 or the sliding plate oil cylinder 604 and the lifting oil cylinder 605 can act simultaneously.

In order to improve the loading efficiency of the compression vehicle, specifically, the working speed of the lifting scraper cylinder 603 and the slide plate cylinder 604, when the lifting oil cylinder 605 stops and the scraper cylinder 603 or the slide plate cylinder 604 is acting, the flow rate of the second gear pump 402 is merged with the flow rate of the first gear pump 401 through the oil return pipeline b2 and the oil return pipeline b1, and at this time, the scraper cylinder 603 or the slide plate cylinder 604 acts in a merged state, so that the speed is improved.

When the lift cylinder 605 is operating, the return line b2 is cut off, and the flow rate of the second gear pump 402 is supplied to the lift cylinder 605 for operation, and at this time, no confluence occurs.

When the filler cylinder 601 or the push plate cylinder 602 operates alone, the flow rate is supplied by the first gear pump 402 alone, and at this time, the flow rate of the second pump 401 directly returns to the hydraulic tank 1 through the combined return line b2 and the oil return line b1, and no operational combination is formed. A check valve 508 is provided on the return line b2 to prevent the flow of the first gear pump 402 from affecting the flow of the second gear pump 401.

The foregoing is directed to embodiments of the present invention, and equivalents, modifications, substitutions and variations such as will occur to those skilled in the art, which fall within the scope and spirit of the appended claims.