阅读说明：本技术 掘进机的液压系统和掘进机 (Hydraulic system of heading machine and heading machine ) 是由 刘飞香 刘伟 于洋 张明明 李深远 曾定荣 郭云翔 刘佩芝 于 2020-05-26 设计创作，主要内容包括：本发明提供了一种掘进机的液压系统和掘进机。掘进机的液压系统包括：电液换向阀、推进油缸、先导溢流阀、第一电磁换向阀和第一单向顺序阀。电液换向阀与推进油缸相连,用于控制推进油缸的伸缩,先导溢流阀、第一电磁换向阀和第一单向顺序阀组成刹车阀,刹车阀与电液换向阀的回油口相连,可快速调节油缸的伸出或者缩回速度,实现掘进机的调向或者盾体的铲渣功能。(The invention provides a hydraulic system of a heading machine and the heading machine. The hydraulic system of the heading machine comprises: the hydraulic control system comprises an electro-hydraulic directional valve, a propulsion oil cylinder, a pilot overflow valve, a first electromagnetic directional valve and a first one-way sequence valve. The electro-hydraulic reversing valve is connected with the propulsion oil cylinder and used for controlling the extension and retraction of the propulsion oil cylinder, the pilot overflow valve, the first electromagnetic reversing valve and the first one-way sequence valve form a brake valve, the brake valve is connected with an oil return port of the electro-hydraulic reversing valve, the extension or retraction speed of the oil cylinder can be rapidly adjusted, and the direction adjustment of the tunneling machine or the slag shoveling function of a shield body can be realized.)

1. A hydraulic system of a heading machine, comprising:

an oil inlet main path (4);

the electro-hydraulic reversing valve (9) is a three-position four-way valve, and a P port of the electro-hydraulic reversing valve (9) is communicated with the oil inlet main path (4);

a rodless cavity of the propulsion oil cylinder (17) is communicated with an opening A of the electro-hydraulic reversing valve (9), and a rod cavity of the propulsion oil cylinder (17) is communicated with an opening B of the electro-hydraulic reversing valve (9);

an oil inlet of the pilot overflow valve (14) is communicated with a T port of the electro-hydraulic reversing valve (9), and an oil outlet of the pilot overflow valve (14) is used for returning oil;

the first electromagnetic directional valve (15), the first electromagnetic directional valve (15) is a two-position four-way valve, the P port of the first electromagnetic directional valve (15) is connected with the pilot oil port of the pilot overflow valve (14), and the A port and the T port of the first electromagnetic directional valve (15) are used for returning oil;

an oil inlet of the first one-way sequence valve (13) is communicated with a T port of the electro-hydraulic reversing valve (9), and an oil outlet of the first one-way sequence valve (13) is communicated with an oil return main path;

when the electro-hydraulic reversing valve (9) is at the a position, a port P of the electro-hydraulic reversing valve (9) is communicated with a port B, and a port A of the electro-hydraulic reversing valve (9) is communicated with a port T; when the electro-hydraulic reversing valve (9) is at the B position, a port P of the electro-hydraulic reversing valve (9) is communicated with a port A, and a port B of the electro-hydraulic reversing valve (9) is communicated with a port T; in the condition that the first electromagnetic directional valve (15) is electrified, the port P of the first electromagnetic directional valve (15) is communicated with the port B, the port A of the first electromagnetic directional valve (15) is communicated with the port T, in the condition that the first electromagnetic directional valve (15) is not electrified, the port P of the first electromagnetic directional valve (15) is communicated with the port A, and the port B of the first electromagnetic directional valve (15) is communicated with the port T.

2. The hydraulic system of a heading machine according to claim 1, further comprising a balancing valve block (12);

the balance valve group (12) comprises two oil inlets and two oil outlets;

an A port and a B port of the electro-hydraulic reversing valve (9) are respectively communicated with one of two oil inlets of the balance valve group (12), and a rodless cavity and a rod cavity of the propulsion oil cylinder (17) are respectively communicated with one of two oil outlets of the balance valve group (12).

3. The hydraulic system of a heading machine according to claim 2,

a pressure sensor is arranged between an oil outlet of the balance valve group (12) and a rodless cavity of the propulsion oil cylinder (17);

and a pressure sensor is arranged between the other oil outlet of the balance valve group (12) and a rod cavity of the propulsion oil cylinder (17).

4. The hydraulic system of a heading machine according to any one of claims 1 to 3, further comprising a proportional speed control valve (2);

an oil inlet of the proportional speed control valve (2) is communicated with the oil inlet main path (4), and an oil outlet of the proportional speed control valve (2) is communicated with a P port of the electro-hydraulic reversing valve (9).

5. The hydraulic system of a heading machine according to claim 4, further comprising a filter (1);

an oil inlet of the filter (1) is connected with the oil inlet main path (4), and an oil outlet of the filter (1) is connected with an oil inlet of the proportional speed regulating valve (2).

6. The hydraulic system of a heading machine according to any one of claims 1 to 3, further comprising:

the second electromagnetic directional valve (5) is a two-position four-way valve, a P port of the second electromagnetic directional valve (5) is communicated with the oil inlet main path (4), and a T port of the second electromagnetic directional valve (5) is used for returning oil;

the cavity C of the two-way cartridge valve (6) is communicated with the port A of the two electromagnetic directional valves (5) through a damper (7), and the port B of the two electromagnetic directional valves (5) is communicated with the oil inlet main path (4); the port A of the two electromagnetic directional valves (5) is used for returning oil;

wherein, when the second electromagnetic directional valve (5) is electrified, the port P of the second electromagnetic directional valve (5) is communicated with the port B, the port A of the second electromagnetic directional valve (5) is communicated with the port T, and when the second electromagnetic directional valve (5) is not electrified, the port P of the second electromagnetic directional valve (5) is communicated with the port A, and the port B of the second electromagnetic directional valve (5) is communicated with the port T.

7. The hydraulic system of a heading machine according to any one of claims 1 to 3, further comprising:

an oil inlet of the proportional overflow valve (3) is communicated with a P port of the electro-hydraulic reversing valve (9), and an oil outlet of the proportional overflow valve (3) is used for returning oil; and/or

The stroke sensor (16) is connected with the propulsion oil cylinder (17) and used for detecting the telescopic length of the propulsion oil cylinder (17).

8. The hydraulic system of a heading machine according to any one of claims 1 to 3, further comprising:

an oil outlet of the second one-way sequence valve (10) is communicated with a port B of the electro-hydraulic reversing valve (9), and an oil inlet of the second one-way sequence valve (10) is communicated with a rod cavity of the thrust oil cylinder (17);

an oil inlet of the overflow valve (11) is communicated with a port B of the electro-hydraulic reversing valve (9), and an oil outlet of the overflow valve (11) is communicated with a port T of the electro-hydraulic reversing valve (9).

9. The hydraulic system of a heading machine according to any one of claims 1 to 3,

the number of the propulsion oil cylinders (17) is multiple;

and rodless cavities of the plurality of the propulsion oil cylinders (17) are communicated with the port A of the electro-hydraulic reversing valve (9), and rod cavities of the plurality of the propulsion oil cylinders (17) are communicated with the port B of the electro-hydraulic reversing valve (9).

10. A heading machine, comprising:

a body (210);

and four sets of hydraulic systems (200) of the heading machine as claimed in any one of claims 1 to 9, wherein the four sets of thrust cylinders (17) of the hydraulic systems (200) are respectively arranged at the top position, the bottom position and the left and right ends of the body (210).

Technical Field

The invention relates to the technical field of hydraulic pressure, in particular to a hydraulic system of a heading machine and the heading machine comprising the hydraulic system.

Background

At present, the existing hydraulic system of a shield type TBM (Tunnel Boring Machine) only performs on-off control in the oil return process of a thrust cylinder, cannot perform speed control, and correspondingly cannot perform direction regulation control on the TBM in the step changing process.

Disclosure of Invention

In order to improve at least one of the above technical problems, an object of the present invention is to provide a hydraulic system of a heading machine.

Another object of the present invention is to provide a heading machine including the above hydraulic system.

In order to achieve the above object, according to a first aspect of the present invention, there is provided a hydraulic system of a heading machine, including: an oil inlet main path; the electro-hydraulic reversing valve is a three-position four-way valve, and a port P of the electro-hydraulic reversing valve is communicated with the oil inlet main path; a rodless cavity of the propulsion oil cylinder is communicated with an opening A of the electro-hydraulic reversing valve, and a rod cavity of the propulsion oil cylinder is communicated with an opening B of the electro-hydraulic reversing valve; an oil inlet of the pilot overflow valve is communicated with a T port of the electro-hydraulic reversing valve, and an oil outlet of the pilot overflow valve is used for returning oil; the first electromagnetic directional valve is a two-position four-way valve, a port P of the first electromagnetic directional valve is connected with a pilot oil port of the pilot overflow valve, and a port A and a port T of the first electromagnetic directional valve are used for returning oil; an oil inlet of the first one-way sequence valve is communicated with a T port of the electro-hydraulic reversing valve, and an oil outlet of the first one-way sequence valve is communicated with an oil return main path; when the electro-hydraulic reversing valve is at the position a, a port P of the electro-hydraulic reversing valve is communicated with a port B, and a port A of the electro-hydraulic reversing valve is communicated with a port T; when the electro-hydraulic reversing valve is at the B position, a port P of the electro-hydraulic reversing valve is communicated with a port A, and a port B of the electro-hydraulic reversing valve is communicated with a port T; in the condition that the first electromagnetic directional valve is electrified, the port P of the first electromagnetic directional valve is communicated with the port B, the port A of the first electromagnetic directional valve is communicated with the port T, in the condition that the first electromagnetic directional valve is not electrified, the port P of the first electromagnetic directional valve is communicated with the port A, and the port B of the first electromagnetic directional valve is communicated with the port T.

The hydraulic system of the heading machine provided by the technical scheme comprises an electro-hydraulic directional valve, a propulsion oil cylinder, a pilot overflow valve, a first electromagnetic directional valve and a first one-way sequence valve. The port A and the port B of the electro-hydraulic reversing valve are respectively connected with a rod cavity and a rodless cavity of the propulsion oil cylinder, and the port P is connected with an oil inlet main path, so that after hydraulic oil is introduced, hydraulic oil is controlled to be conveyed to the rod cavity or the rodless cavity of the propulsion oil cylinder by electrifying an electromagnet a or an electromagnet B of the electro-hydraulic reversing valve, and the propulsion oil cylinder stretches.

One end of a T port of the electro-hydraulic directional valve is connected with a pilot overflow valve, the pilot overflow valve is connected in series on an oil return path and is matched with the first electromagnetic directional valve to form a brake valve, the brake valve does not work under the condition that the first electromagnetic directional valve is not electrified, hydraulic oil discharged from the T port of the electro-hydraulic directional valve directly returns to the oil tank through the pilot overflow valve and the first electromagnetic directional valve, the hydraulic oil enters the interior of a valve body of the pilot overflow valve under the condition that the first electromagnetic directional valve is electrified, oil inlet pressure is required to be greater than adjusting pressure of the pilot overflow valve and spring force of the main valve core, and the hydraulic oil can only return to the oil tank through the pilot overflow. Therefore, the first electromagnetic reversing valve can timely control the return of hydraulic oil on one side of the T port of the electro-hydraulic reversing valve, so that the pressure in a rod cavity or a rodless cavity of the propulsion oil cylinder communicated with the T port of the electro-hydraulic reversing valve is controlled, and the brake effect is achieved. The use is quick and convenient, the extending or retracting speed of the propulsion oil cylinder can be quickly adjusted, and the direction adjustment of the TBM or the slag shoveling function of the shield body can be realized.

In addition, one end of a T port of the electro-hydraulic reversing valve is connected with a first one-way sequence valve, and when the load pressure exceeds the set pressure (set pressure), the overflow valve is opened for protection, so that the use reliability and the use stability of the hydraulic system of the heading machine provided by the technical scheme are improved.

In addition, the hydraulic system of the heading machine in the technical scheme provided by the invention can also have the following additional technical characteristics:

in the technical scheme, the hydraulic system of the heading machine further comprises a balance valve group, wherein the balance valve group comprises two oil inlets and two oil outlets; and the port A and the port B of the electro-hydraulic reversing valve are respectively communicated with one of two oil inlets of the balance valve group, and the rodless cavity and the rod cavity of the propulsion oil cylinder are respectively communicated with one of two oil outlets of the balance valve group.

In the technical scheme, a pressure sensor is arranged between one oil outlet of the balance valve group and a rodless cavity of the propulsion oil cylinder; and a pressure sensor is arranged between the other oil outlet of the balance valve group and the rod cavity of the propulsion oil cylinder.

In any of the above technical solutions, the hydraulic system of the heading machine further includes a proportional speed control valve, an oil inlet of the proportional speed control valve is communicated with the oil inlet main path, and an oil outlet of the proportional speed control valve is communicated with the port P of the electro-hydraulic directional valve.

In the above technical scheme, the hydraulic system of the heading machine further includes a filter, an oil inlet of the filter is connected with the oil inlet main path, and an oil outlet of the filter is connected with an oil inlet of the proportional speed control valve.

In any one of the above technical solutions, the hydraulic system of the heading machine further includes a second electromagnetic directional valve, the second electromagnetic directional valve is a two-position four-way valve, a P port of the second electromagnetic directional valve is communicated with the oil inlet main path, and a T port of the second electromagnetic directional valve is used for returning oil; the cavity C of the two-way cartridge valve is communicated with the ports A of the two electromagnetic directional valves through damping, and the ports B of the two electromagnetic directional valves are communicated with the oil inlet main path; the ports A of the two electromagnetic directional valves are used for returning oil; when the second electromagnetic directional valve is not powered, the port P of the second electromagnetic directional valve is communicated with the port A, and the port B of the second electromagnetic directional valve is communicated with the port T.

In any technical scheme, the hydraulic system of the development machine further comprises a proportional overflow valve, an oil inlet of the proportional overflow valve is communicated with a port P of the electro-hydraulic reversing valve, and an oil outlet of the proportional overflow valve is used for returning oil; and/or a stroke sensor, wherein the stroke sensor is connected with the propulsion oil cylinder and is used for detecting the telescopic length of the propulsion oil cylinder.

In any one of the above technical solutions, the hydraulic system of the heading machine further includes a second one-way sequence valve, an oil outlet of the second one-way sequence valve is communicated with the port B of the electro-hydraulic directional valve, and an oil inlet of the second one-way sequence valve is communicated with the rod cavity of the thrust cylinder; and an oil inlet of the overflow valve is communicated with a port B of the electro-hydraulic reversing valve, and an oil outlet of the overflow valve is communicated with a port T of the electro-hydraulic reversing valve.

In any one of the above technical solutions, the number of the propulsion cylinders is plural; and the rodless cavities of the plurality of the propulsion oil cylinders are communicated with the port A of the electro-hydraulic reversing valve, and the rod cavities of the plurality of the propulsion oil cylinders are communicated with the port B of the electro-hydraulic reversing valve.

The technical solution of the second aspect of the present invention provides a heading machine, including: a body; and four sets of hydraulic systems of the heading machine according to any one of the technical schemes of the first aspect, wherein the four sets of propulsion oil cylinders of the hydraulic systems are respectively arranged at the top position, the bottom position and the left end and the right end of the body.

Wherein, the heading Machine is a short name of a full-face Tunnel Boring Machine (TBM).

The heading machine provided by the technical scheme of the second aspect of the invention comprises the hydraulic system of the heading machine according to any one of the technical schemes of the first aspect, so that all the beneficial effects of any one of the technical schemes are achieved, and the details are not repeated herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a hydraulic system of a heading machine according to some embodiments of the present invention;

fig. 2 is a schematic structural diagram of a hydraulic system of a heading machine according to some embodiments of the invention;

figure 3 is a schematic structural view of a heading machine according to some embodiments of the present invention;

fig. 4 is a schematic structural view of a heading machine according to some embodiments of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:

1, a filter; 2, a proportional speed regulating valve; 3, a proportional overflow valve; 4, feeding an oil main path; 5 a second electromagnetic directional valve; 6, a two-way cartridge valve; 7, damping; 8, a pressure sensor; 9, an electro-hydraulic reversing valve; 10 a second one-way sequence valve; 11 an overflow valve; 12 balancing the valve group; 13 a first one-way sequence valve; 14 a pilot overflow valve; 15 a first electromagnetic directional valve; a 16 travel sensor; 17 a propulsion cylinder; 100, a heading machine; 200 hydraulic system; 210 body.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The hydraulic system of the heading machine and the heading machine according to some embodiments of the present invention will be described with reference to fig. 1 to 4.

Some embodiments of the present application provide a hydraulic system 200 for a heading machine.