阅读说明：本技术 一种用于废钢打包机推头的液压系统及废钢打包机 (Hydraulic system for pushing head of steel scrap packing machine and steel scrap packing machine ) 是由 费望龙 沈湘洪 杨岱璋 于 2020-04-02 设计创作，主要内容包括：本发明提出了一种用于废钢打包机推头的液压系统及废钢打包机,涉及废钢打包技术领域,该用于废钢打包机推头的液压系统包括：用于驱动同一废钢打包机推头的油缸组；所述油缸组包括：若干第一油缸、若干可随动于第一油缸运动的第二油缸。在废钢打包机推头后退和小负载前进时,油源输出的油液只驱动第一油缸运动,因而能够在后退和小负载前进时以较快的速度运行,提高了废钢打包机在低负载工况下的运行效率。(The invention provides a hydraulic system for a push head of a steel scrap packing machine and the steel scrap packing machine, which relate to the technical field of steel scrap packing, and the hydraulic system for the push head of the steel scrap packing machine comprises: the oil cylinder group is used for driving the push head of the same scrap steel packaging machine; the cylinder group includes: a plurality of first oil cylinders and a plurality of second oil cylinders which can move along with the first oil cylinders. When the push head of the scrap steel packer retreats and the small load advances, oil output by the oil source only drives the first oil cylinder to move, so that the scrap steel packer can operate at a higher speed when retreating and the small load advances, and the operating efficiency of the scrap steel packer under a low-load working condition is improved.)

1. The utility model provides a hydraulic system for steel scrap baling press is cut somebody's turn as go-between which characterized in that, this a hydraulic system for steel scrap baling press is cut somebody's turn as go-between includes: the oil cylinder group (1) is used for driving the push head of the same scrap steel packaging machine; the cylinder group (1) comprises: a plurality of first oil cylinders (101) and a plurality of second oil cylinders (102) which can move along with the first oil cylinders.

2. The hydraulic system for a pusher of a scrap baler according to claim 1, further comprising: the oil pump comprises a first oil way (3) for supplying oil from an oil source (2) to a rodless cavity of a first oil cylinder (101), a second oil way (4) for supplying oil from the oil source (2) to a rod cavity of the first oil cylinder (101), a third oil way (5) for discharging oil from the rodless cavity of the first oil cylinder (101) to an oil tank, a fourth oil way (6) for discharging oil from the rod cavity of the first oil cylinder (101) to the oil tank, and a fifth oil way (7) for connecting the rodless cavity of a second oil cylinder (102) with one end, close to the rodless cavity of the first oil cylinder (101), of the first oil way (3);

the first oil way (3) is provided with a first switch unit (301), the second oil way (4) is provided with a second switch unit (401), the third oil way (5) is provided with a third switch unit (501), and the fourth oil way (6) is provided with a fourth switch unit (601); the fifth oil path (7) is provided with a fifth switch unit (701).

3. The hydraulic system for the pusher of a scrap baler according to claim 2, characterized in that the first to fifth switching units (301, 701) are embodied as cartridge-mounted valve blocks.

4. The hydraulic system for a pusher of a scrap baler according to claim 1, further comprising: a sixth oil path (8) for connecting the rodless cavity of the second oil cylinder (102) with the oil tank; a hydraulic control one-way valve (801) is arranged on the sixth oil way (8); an oil inlet of the hydraulic control one-way valve (801) is connected to an oil tank, an oil outlet of the hydraulic control one-way valve is connected to a rodless cavity of the second oil cylinder (102), and a control oil port is connected to an oil source (2) through a control oil path (9); a reversing valve (901) is arranged on the control oil way (9); the rod chamber of the second cylinder (102) is connected to the oil tank.

5. The hydraulic system for a pusher of a scrap baler according to claim 4, characterized in that a differential valve group (10) is arranged between the rodless chamber and the rod chamber of the second cylinder (102); the differential valve group (10) can be opened when the second oil cylinder (102) follows.

6. The hydraulic system for a pusher head of a scrap baler according to claim 5, characterized in that the differential valve group (10) is a cartridge-type control valve group.

7. The hydraulic system for a pusher of a scrap baler according to claim 4, characterized in that the pilot operated check valve (801) is a charging valve.

8. The hydraulic system for the pusher head of a scrap baler according to claim 4, characterized in that a cartridge-type pilot valve block (802) is used instead of the pilot operated check valve (801).

9. The hydraulic system for the pusher of a scrap baler according to claim 1, wherein the rodless chamber of the second cylinder (102) is connected to the oil tank by a check valve (11), wherein the oil inlet of the check valve (11) is connected to the oil tank; the rod chamber of the second cylinder (102) is directly connected to the tank.

10. A scrap baler characterised by a hydraulic system for a pusher of the scrap baler as claimed in any one of claims 1 to 9.

Technical Field

The application relates to the technical field of scrap steel packing, in particular to a hydraulic system for a push head of a scrap steel packing machine and the scrap steel packing machine.

Background

And the waste steel is discarded or damaged in production and life engineering and is used as recycled waste steel. The packing and briquetting process includes pressing loose material into rectangular packing block for easy transportation and smelting. The scrap baler is a basic apparatus for scrap recycling, which is used to compress loose scrap.

Typically, hydraulically driven scrap baling presses have a plurality of hydraulic cylinders for pushing the ram from multiple directions to compress the scrap. For example, chinese patent CN2112453732.8 discloses a scrap baler, which relates to a first cylinder, a second cylinder and a third cylinder, which are installed in different directions to compress scrap from three directions. Chinese patent cn2161774645.x discloses a scrap steel baling machine, which relates to a primary cylinder, a secondary cylinder, and a door cover cylinder, which are respectively located in three directions.

The working condition of the steel scrap packer is that loose waste metal is extruded into a briquetting with high compactness, the stroke of a push head, particularly a side push head of the steel scrap packer is long, a large part of the push head is almost in no-load stroke, but the diameter of an oil cylinder of the packer needs to be matched according to the maximum extrusion tonnage, the area of the oil cylinder is large under the condition of limited oil supply flow, and the action speed is slow.

Disclosure of Invention

The technical problem that this application will solve lies in, to prior art's the aforesaid not enough, provides a hydraulic system and steel scrap baling press that is used for steel scrap baling press to push away the head to improve the speed of steel scrap baling press when retreating and little load gos forward.

This a hydraulic system for scrap steel baling press cuts somebody's hair includes: the oil cylinder group is used for driving the push head of the same scrap steel packaging machine; the cylinder group includes: a plurality of first oil cylinders and a plurality of second oil cylinders which can move along with the first oil cylinders.

Further, still include: the oil pump comprises a first oil way, a second oil way, a third oil way, a fourth oil way and a fifth oil way, wherein the first oil way is used for supplying oil to a rodless cavity of a first oil cylinder from an oil source, the second oil way is used for supplying oil to a rod cavity of the first oil cylinder from the oil source, the third oil way is used for discharging oil from the rodless cavity of the first oil cylinder to an oil tank, the fourth oil way is used for discharging oil from the rod cavity of the first oil cylinder to the oil tank, and the fifth oil way is used for connecting the rodless cavity of the second oil cylinder with one;

the first oil way is provided with a first switch unit, the second oil way is provided with a second switch unit, the third oil way is provided with a third switch unit, and the fourth oil way is provided with a fourth switch unit; and a fifth switch unit is arranged on the fifth oil path.

Furthermore, the first switch unit to the fifth switch unit are plug-in type control valve sets.

Further, still include: a sixth oil path for connecting the rodless cavity of the second oil cylinder with the oil tank; a hydraulic control one-way valve is arranged on the sixth oil way; an oil inlet of the hydraulic control one-way valve is connected to the oil tank, an oil outlet of the hydraulic control one-way valve is connected to the rodless cavity of the second oil cylinder, and a control oil port is connected to an oil source through a control oil path; a reversing valve is arranged on the control oil path; the rod chamber of the second cylinder is connected to the oil tank.

Further, a differential valve group is arranged between the rodless cavity and the rod cavity of the second oil cylinder; the differential valve group can be opened when the second oil cylinder follows.

Furthermore, the differential valve group is a plug-in control valve group.

Further, the hydraulic control one-way valve is a liquid filling valve.

Furthermore, a plug-in control valve group is adopted to replace a hydraulic control one-way valve.

Furthermore, a rodless cavity of the second oil cylinder is connected to an oil tank through a one-way valve, wherein an oil inlet of the one-way valve is connected with the oil tank; the rod chamber of the second cylinder is directly connected to the oil tank.

On the other hand, this application has still provided a steel scrap baling press, and this steel scrap baling press has above any kind and is used for the hydraulic system of steel scrap baling press pushing head.

In the scheme, when the push head of the steel scrap packer retreats and the small load advances, oil output by the oil source only drives the first oil cylinder to move, so that the steel scrap packer can operate at a higher speed when retreating and the small load advances, and the operating efficiency of the steel scrap packer under a low-load working condition is improved.

Drawings

FIG. 1 is a schematic structural view of a scrap baler in an embodiment of the present application.

FIG. 2 is a schematic structural diagram of a hydraulic system for a push head of a scrap steel packer in an embodiment of the present application.

FIG. 3 is another schematic structural diagram of a hydraulic system for a pusher head of a scrap baler according to an embodiment of the present application.

FIG. 4 is another schematic structural diagram of a hydraulic system for a pusher head of a scrap steel baler according to an embodiment of the present application.

FIG. 5 is another schematic structural diagram of a hydraulic system for a pusher head of a scrap baler according to an embodiment of the present application.

Detailed Description

The following are specific embodiments of the present application and are further described with reference to the drawings, but the present application is not limited to these embodiments. In the following description, specific details such as specific configurations and components are provided only to help the embodiments of the present application be fully understood. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

In addition, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

FIG. 1 is a schematic structural view of a scrap baler in an embodiment of the present application. Referring to fig. 1, the scrap baler is provided with hydraulic cylinders in a plurality of directions for compressing scrap in a plurality of different directions to process the scrap into a rectangular parallelepiped shape; the scrap steel packer is provided with push heads driven by hydraulic cylinders to stretch in different directions, and the scrap steel packer can specifically comprise a hydraulic cylinder S1 and a hydraulic cylinder S2 acting on the push heads, and a door cover cylinder S3 acting on a door cover. In some embodiments, hydraulic cylinder S1 and hydraulic cylinder S2 may each be provided as a cylinder bank of a plurality of cylinders.

Referring to fig. 2 to 5, the hydraulic system for the pusher of the scrap baler comprises: the oil cylinder group 1 is used for driving the push head of the same scrap steel packaging machine; the cylinder group 1 includes: a plurality of first oil cylinders 101 and a plurality of second oil cylinders 102 which can move along with the first oil cylinders. When the push head of the scrap steel packer retreats and the small load advances, oil output by the oil source only drives the first oil cylinder 101 to move, so that the scrap steel packer can operate at a higher speed when retreating and the small load advances under the condition of the same flow, and the operating efficiency of the scrap steel packer under a low-load working condition is improved. Under the condition of heavy load, the first oil cylinder 101 and the second oil cylinder 102 can jointly drive the push head of the scrap steel packer to advance.

Further, this a hydraulic system for scrap steel baling press pushing head still includes: a first oil path 3 for supplying oil from the oil source 2 to a rodless cavity of the first oil cylinder 101, a second oil path 4 for supplying oil from the oil source 2 to a rod cavity of the first oil cylinder 101, a third oil path 5 for discharging oil from the rodless cavity of the first oil cylinder 101 to an oil tank, a fourth oil path 6 for discharging oil from the rod cavity of the first oil cylinder 101 to the oil tank, and a fifth oil path 7 for connecting the rodless cavity of the second oil cylinder 102 with one end of the first oil path 3 close to the rodless cavity of the first oil cylinder 101; a first switch unit 301 is arranged on the first oil path 3, a second switch unit 401 is arranged on the second oil path 4, a third switch unit 501 is arranged on the third oil path 5, and a fourth switch unit 601 is arranged on the fourth oil path 6; a fifth opening and closing unit 701 is provided in the fifth oil passage 7. Specifically, when the first switch unit 301 and the fourth switch unit 601 are opened, the push head rapidly advances, the oil source 2 supplies oil to the rod-free cavity of the first oil cylinder 101 through the first oil path 3, the rod cavity of the first oil cylinder 101 discharges oil to the oil tank through the fourth oil path 6, at this time, the first oil cylinder 101 pushes the push head of the scrap steel baler to rapidly advance, and the second oil cylinder 102 follows up. When the first switch unit 301 and the second switch unit 401 are opened, the push head rapidly and differentially moves forward, the oil source 2 supplies oil to the rodless cavity of the first oil cylinder 101 through the first oil path 3, the oil in the rod cavity of the first oil cylinder 101 returns to the main oil path of the oil source 2 through the second oil path 4, and can enter the rodless cavity of the first oil cylinder 101 through the first oil path 3 again, so that a differential circuit is formed, the forward speed of the first oil cylinder 101 can be increased, and at the moment, the second oil cylinder 102 follows up. When the first switch unit 301, the fourth switch unit 601 and the fifth switch unit 701 are turned on, the push head moves forward at a high speed, the oil source 2 supplies oil to the rodless cavity of the first oil cylinder 101 through the first oil path 3, and the rod cavity of the first oil cylinder 101 discharges oil to the oil tank through the fourth oil path 6; the oil source 2 supplies oil to the rodless cavity of the second oil cylinder 102 through the first oil way 3 and the fifth oil way 7, the rod cavity of the second oil cylinder 102 can directly discharge oil to the oil tank to drive the second oil cylinder 102 to move, and at the moment, the first oil cylinder 101 and the second oil cylinder 102 jointly drive the push head of the scrap steel packaging machine to advance, so that the waste steel packaging machine is suitable for the condition of large load. When the second switch unit 401 and the third switch unit 501 are opened, the pushing head rapidly moves backwards, the oil source 2 supplies oil to the rod cavity of the first oil cylinder 101 through the second oil path 4, the rodless cavity of the first oil cylinder 101 discharges oil to the oil tank through the third oil path 5, at the moment, the first oil cylinder 101 drives the pushing head of the scrap steel packaging machine to rapidly move backwards, and at the moment, the second oil cylinder 102 follows up.

In some embodiments, the first to fifth switching units 301 to 701 are embodied as cartridge type valve groups. The cartridge valve can be used for direction control in an oil circuit, and the specific implementation form is the known technical content and will not be described in detail herein.

In the embodiment of the present application, the structure for the follow-up process of the second cylinder 102 may have a plurality of structures, and fig. 2 to 5 correspond to 4 implementation manners, and these four structures are specifically described below.

Referring to fig. 2, the hydraulic system for the pusher of the scrap baler further comprises: a sixth oil path 8 for connecting the rodless cavity of the second oil cylinder 102 with the oil tank; a hydraulic control one-way valve 801 is arranged on the sixth oil way 8; an oil inlet of the hydraulic control one-way valve 801 is connected to an oil tank, an oil outlet of the hydraulic control one-way valve 801 is connected to a rodless cavity of the second oil cylinder 102, and a control oil port is connected to the oil source 2 through a control oil path 9; a reversing valve 901 is arranged on the control oil path 9; the rod chamber of the second cylinder 102 is connected to the oil tank. When the second oil cylinder 102 moves forward in a follow-up manner, the rodless cavity of the second oil cylinder 102 sucks oil from the oil tank, and the rod cavity discharges oil to the oil tank. When the second oil cylinder 102 moves backward, the reversing valve 901 is adjusted, the oil source 2 outputs pressure oil to the control oil port of the hydraulic control one-way valve 801, so that the hydraulic control one-way valve 801 is conducted reversely, at this time, the rod cavity of the second oil cylinder 102 sucks oil from the oil tank, and the rodless cavity discharges oil to the oil tank through the sixth oil path 8.

In some embodiments, the pilot operated check valve 801 is a charge valve.

Referring to fig. 3, a differential valve set 10 is added to the structure corresponding to fig. 2, specifically, the differential valve set 10 is disposed between the rodless cavity and the rod cavity of the second cylinder 102; the differential valve set 10 can be opened when the second cylinder 102 is actuated. When the second cylinder 102 is driven, the rod cavity and the rodless cavity of the second cylinder are communicated through the differential valve group 10, and the oil tank only needs to provide a part of flow corresponding to the area difference between the two cavities, so that the flow is greatly reduced compared with the flow without the differential valve group 10, the bottleneck limit of oil absorption flow is further broken through, and the speed can be greatly improved.

In some embodiments, the differential valve block 10 is a cartridge-style control valve block.

Referring to fig. 4, in the structure corresponding to fig. 2, a cartridge type pilot valve group 802 is adopted instead of the pilot operated check valve 801. The cartridge pilot valve block 802 serves to perform the same function as the pilot operated check valve 801.

Referring to fig. 5, a common check valve is used instead of the pilot operated check valve 801, compared to the structure corresponding to fig. 2. Specifically, the rodless cavity of the second oil cylinder 102 is connected to the oil tank through a check valve 11, wherein an oil inlet of the check valve 11 is connected with the oil tank; the rod chamber of the second cylinder 102 is directly connected to the tank. When the second oil cylinder 102 is pushed forwards along with follow-up, the rodless cavity of the second oil cylinder sucks oil from the oil tank through the one-way valve 11, and the rod cavity of the second oil cylinder discharges oil to the oil tank; when the second oil cylinder 102 moves backwards along with the follow-up, the rod cavity absorbs oil from the oil tank, and the rod cavity discharges oil to the oil tank through the fifth oil path 7 and the third oil path 5.

The cartridge control valve block according to the embodiment of the present invention is a control valve block including a cartridge valve. The cartridge valve can be combined into various directional control valves, and the specific form thereof is known in the prior art and will not be described in detail herein.

The embodiments of the present application also show a scrap baler with the hydraulic system for the pusher head of the scrap baler shown in the previous embodiment. The relevant contents can be referred to the description of the hydraulic system for the pusher head of the scrap steel packer in the previous embodiment, and the description is omitted.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the present application as defined by the appended claims.