A hydraulic flow self-distributing hydraulic system for a hydraulic scrap bale breaker

Abstract

The application discloses a hydraulic steel scrap bale unpacking machine flow self-distribution hydraulic system, and belongs to the technical field of the hydraulic system of the steel scrap bale unpacking machine. The hydraulic system can solve the problem that the existing unpacking machine hydraulic system cannot satisfy the multi-cylinder action and causes the uneven distribution of the hydraulic flow and pressure. The hydraulic system comprises parallel first pump oil paths and second pump oil paths, and parallel first control oil paths, second control oil paths and third control oil paths. A hydraulic control check valve is arranged on a confluence oil path between the second control oil paths and the third control oil paths, and the hydraulic control check valve is electrically connected with an electromagnetic reversing valve. The first control oil paths comprise a first electro-hydraulic reversing valve, a first double hydraulic control check valve and a first double check valve, and the first electro-hydraulic reversing valve, the first double hydraulic control check valve and the first double check valve are sequentially arranged on an oil path between the confluence oil path and a front clamping cylinder. The hydraulic system can realize the flow pressure self-distribution and self-adaption in the unpacking process.

Description

Technical Field

[0001] This invention relates to the technical field of hydraulic systems for scrap steel briquetting unpacking machines, and more specifically, to a hydraulic flow self-distribution hydraulic system for a hydraulic scrap steel briquetting unpacking machine. Background Technology

[0002] In converter steelmaking, 20-30% scrap steel is usually added directly for smelting to reduce costs. Purchased scrap steel is usually made by pressing loose scrap steel into cubic blocks using a hydraulic system, which ensures safe transportation while reducing transportation costs. During steelmaking, it is essential to prevent sealed containers from entering the converter to avoid safety accidents caused by converter blasting. Therefore, the cubic blocks arriving on site must be randomly inspected and unpacked.

[0003] Currently used scrap steel bale unpacking machines typically employ four hydraulic cylinders to clamp the scrap steel bales, followed by a pulling cylinder to separate them. The hydraulic system corresponding to these machines, such as the hydraulic scrap steel bale unpacking system disclosed in patent number N202021739951.8, includes an oil tank. The oil tank is connected in parallel to a first and second pumping system via oil pipes. Following the first and second pumping systems are a unpacking cylinder control system, a rear clamping cylinder control system, and a front clamping cylinder control system. This hydraulic system can handle the unpacking of high-density scrap steel bales. It utilizes a combination of control valve groups and pressure sensors, along with an electrical system, to rationally calculate and distribute the operating flow of each cylinder, ensuring stable operation of each cylinder.

[0004] However, in the existing hydraulic system of the unpacking machine, during actual use, when the pulling cylinder is activated, the scrap steel block clamped by the clamping cylinder will stretch and become thinner. At this time, most of the system flow is directed to the pulling cylinder, causing the clamping cylinder to be unable to clamp completely and the unpacking cannot be completed in one go.

[0005] Therefore, there is an urgent need to design a new type of hydraulic self-distribution hydraulic system for a hydraulic scrap steel briquetting unpacking machine to solve the above-mentioned technical problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the prior art. One of its objectives is to provide a hydraulic system for self-distributing flow in a hydraulic scrap steel briquetting unpacking machine, which realizes self-distribution and self-adaptation of flow and pressure during the unpacking process, thereby improving the unpacking efficiency of the scrap steel unpacking machine.

[0007] The technical solution of this invention is as follows: A hydraulic self-distributing hydraulic system for a hydraulic scrap steel briquetting unpacking machine includes a first pump oil circuit and a second pump oil circuit connected in parallel, as well as a first control oil circuit, a second control oil circuit, and a third control oil circuit connected in parallel. One end of the first pump oil circuit and the second pump oil circuit are both connected to an oil tank, and the other end is connected to a common confluence oil circuit. One end of the first control oil circuit is connected to a front clamping cylinder, one end of the second control oil circuit is connected to a rear clamping cylinder, and one end of the third control oil circuit is connected to a pulling cylinder. The other ends of the first, second, and third control oil circuits are all connected to the confluence oil circuit. A hydraulically controlled check valve is provided on the confluence oil circuit between the second and third control oil circuits. The system is electrically connected to an electromagnetic directional valve; the first control oil circuit includes a first electro-hydraulic directional valve, a first dual hydraulically controlled check valve, and a first dual one-way throttle valve, which are sequentially installed on the oil line between the manifold oil circuit and the front clamping cylinder; the second control oil circuit includes a second electro-hydraulic directional valve, a second dual hydraulically controlled check valve, and a second dual one-way throttle valve, which are sequentially installed on the oil line between the manifold oil circuit and the rear clamping cylinder; the third control oil circuit includes a third electro-hydraulic directional valve, the output end of which is connected to the pulling cylinder, and the input end of which is connected to the manifold oil circuit.

[0008] As a further improvement, a first pressure gauge is provided on the oil lines between the front clamping cylinder and the first double one-way throttle valve, the rear clamping cylinder and the second double one-way throttle valve, and the pulling cylinder and the third electro-hydraulic directional valve.

[0009] Furthermore, a first overflow valve is provided in the oil circuit between the front clamping cylinder and the first double one-way throttle valve, the rear clamping cylinder and the second double one-way throttle valve, and the pulling cylinder and the third electro-hydraulic directional valve. The first overflow valve is connected to the oil tank.

[0010] Furthermore, a second pressure gauge is also provided on the aforementioned oil manifold.

[0011] Furthermore, the first pump oil circuit includes a first oil pump and a first check valve, which are sequentially installed on the oil circuit between the oil tank and the manifold oil circuit; the second pump oil circuit includes a second oil pump and a second check valve, which are sequentially installed on the oil circuit between the oil tank and the manifold oil circuit.

[0012] Furthermore, a second overflow valve is provided in the oil line between the first oil pump and the first check valve, and between the second oil pump and the second check valve, and the second overflow valve is connected to the oil tank.

[0013] Furthermore, a third pressure gauge is provided on the oil lines between the first oil pump and the first check valve, and between the second oil pump and the second check valve.

[0014] Furthermore, the first electro-hydraulic directional valve, the second electro-hydraulic directional valve, and the third electro-hydraulic directional valve are all connected to a return oil circuit, which is connected to the oil tank, and a third check valve is provided on the return oil circuit.

[0015] Furthermore, the oil tank is equipped with a dual-barrel return oil filter, a temperature sensor, an air filter, and a level gauge, and the return oil circuit is connected to the dual-barrel return oil filter.

[0016] Beneficial effects

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The flow self-distribution hydraulic system of the present invention provides pressure and flow to three control circuits through two pump oil circuits. A hydraulically controlled check valve is installed on the confluence oil circuit between the second and third control oil circuits. When the third electro-hydraulic directional valve corresponding to the pulling cylinder is energized, the flow rate of the third control oil circuit increases and the pressure decreases due to hydraulic characteristics. At this time, the hydraulically controlled check valve automatically closes. The first pump oil circuit provides pressure and flow to the front clamping cylinder and the rear clamping cylinder separately, and the second pump oil circuit provides pressure and flow to the pulling cylinder separately. This realizes the self-distribution and self-adaptation of flow and pressure during the unpacking process. When the scrap steel block is no longer deformed after being pulled, the hydraulically controlled check valve can be opened by controlling the solenoid directional valve to improve the unpacking efficiency of the scrap steel unpacking machine.

[0019] 2. The flow self-distribution hydraulic system of the present invention is equipped with dual hydraulically controlled check valves and dual one-way throttle valves in both the first and second control oil circuits. This not only enables the opening and clamping of the front and rear clamping cylinders, but also allows the locking of the front and rear clamping cylinders through the dual hydraulically controlled check valves, improving clamping safety. At the same time, the operating speed of the front and rear clamping cylinders is controlled by the dual one-way throttle valves, improving clamping stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the hydraulic system of the present invention.

[0021] The components are as follows: 1-oil tank, 2-manifold oil circuit, 3-front clamping cylinder, 4-rear clamping cylinder, 5-pulling cylinder, 6-hydraulic control check valve, 7-solenoid directional valve, 8-first electro-hydraulic directional valve, 9-first double hydraulic control check valve, 10-first double one-way throttle valve, 11-second electro-hydraulic directional valve, 12-second double hydraulic control check valve, 13-second double one-way throttle valve, 14-third electro-hydraulic directional valve, 15-first pressure gauge, 16-first relief valve, 17-second pressure gauge, 18-first oil pump, 19-first check valve, 20-second oil pump, 21-second check valve, 22-second relief valve, 23-third pressure gauge, 24-return oil circuit, 25-third check valve, 26-dual-barrel return oil filter, 27-temperature sensor, 28-air filter, 29-level gauge. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0023] See Figure 1 The present invention discloses a hydraulic self-distributing hydraulic system for a hydraulic scrap steel briquetting unpacking machine, comprising a first pump oil circuit and a second pump oil circuit connected in parallel, as well as a first control oil circuit, a second control oil circuit, and a third control oil circuit connected in parallel. The first and second pump oil circuits are used to provide pressure and flow to the front clamping cylinder 3, the rear clamping cylinder 4, and the pulling cylinder 5. The first control oil circuit controls the clamping and releasing, operating speed, and locking of the front clamping cylinder 3. The second control oil circuit controls the clamping and releasing, operating speed, and locking of the rear clamping cylinder 4. The third control oil circuit controls... The forward and backward movement of the drawing cylinder 5 is controlled by the oil circuits of the first and second pumps, one end of which is connected to the oil tank 1 and the other end is connected to the manifold 2. One end of the first control oil circuit is connected to the front clamping cylinder 3, one end of the second control oil circuit is connected to the rear clamping cylinder 4, and one end of the third control oil circuit is connected to the drawing cylinder 5. The other ends of the first, second, and third control oil circuits are all connected to the manifold 2. A hydraulic check valve 6 is provided on the manifold 2 between the second and third control oil circuits. The hydraulic check valve 6 is electrically connected to a solenoid directional valve 7.

[0024] The self-distributing hydraulic system of this invention provides pressure and flow to three control circuits through two pump oil circuits. A hydraulically controlled check valve 6 is installed on the confluence oil circuit 2 between the second and third control oil circuits. When the third electro-hydraulic directional valve 14 corresponding to the pulling cylinder 3 is energized, the flow rate of the third control oil circuit increases and the pressure decreases due to hydraulic characteristics. At this time, the hydraulically controlled check valve 6 automatically closes. The first pump oil circuit provides pressure and flow to the front clamping cylinder 3 and the rear clamping cylinder 4 separately, and the second pump oil circuit provides pressure and flow to the pulling cylinder 5 separately. This realizes self-distribution and self-adaptation of flow and pressure during the unpacking process. When the scrap steel block is no longer deformed after being pulled, the hydraulically controlled check valve can be opened by controlling the solenoid directional valve to improve the unpacking efficiency of the scrap steel unpacking machine.

[0025] Preferably, the first control oil circuit includes a first electro-hydraulic directional valve 8, a first dual hydraulically controlled check valve 9, and a first dual one-way throttle valve 10, which are sequentially installed on the oil circuit between the manifold oil circuit 2 and the front clamping cylinder 3; the second control oil circuit includes a second electro-hydraulic directional valve 11, a second dual hydraulically controlled check valve 12, and a second dual one-way throttle valve 13, which are sequentially installed on the oil circuit between the manifold oil circuit 2 and the rear clamping cylinder 4; the third control oil circuit includes a third electro-hydraulic directional valve 14, the output end of which is connected to the pulling cylinder 5, and the input end of which is connected to the manifold oil circuit 2.

[0026] The flow self-distribution hydraulic system of the present invention is equipped with dual hydraulically controlled check valves and dual one-way throttle valves in both the first and second control oil circuits. This not only enables the opening and clamping of the front clamping cylinder 3 and the rear clamping cylinder 4, but also allows the locking of the front clamping cylinder 3 and the rear clamping cylinder 4 through the dual hydraulically controlled check valves, thereby improving clamping safety. At the same time, the operating speed of the front clamping cylinder 3 and the rear clamping cylinder 4 is controlled by the dual one-way throttle valves, thereby improving clamping stability.

[0027] Preferably, a first pressure gauge 15 is provided in the oil circuit between the front clamping cylinder 3 and the first double one-way throttle valve 10, the rear clamping cylinder 4 and the second double one-way throttle valve 13, and the pulling cylinder 5 and the third electro-hydraulic directional valve 14 to monitor the oil pressure in real time and improve the safety of the oil circuit.

[0028] Preferably, a first relief valve 16 is provided in each of the oil lines between the front clamping cylinder 3 and the first double one-way throttle valve 10, the rear clamping cylinder 4 and the second double one-way throttle valve 13, and the pulling cylinder 5 and the third electro-hydraulic directional valve 14. The first relief valve 16 is connected to the oil tank 1. When the pressure in the oil line is too high, the first relief valve 16 opens, returning the high-pressure hydraulic oil to the oil tank 1 to relieve pressure. Furthermore, a second pressure gauge 17 is also provided on the manifold oil line 2 to monitor the oil pressure in real time and improve the safety of the oil line.

[0029] Preferably, the first pump oil circuit includes a first oil pump 18 and a first check valve 19, wherein the first oil pump 18 and the first check valve 19 are sequentially installed on the oil circuit between the oil tank 1 and the manifold oil circuit 2; the second pump oil circuit includes a second oil pump 20 and a second check valve 21, wherein the second oil pump 20 and the second check valve 21 are sequentially installed on the oil circuit between the oil tank 1 and the manifold oil circuit 2, and the check valve on the pipeline prevents the oil circuits from interfering with each other in the oil pump system.

[0030] Preferably, a second relief valve 22 is provided in the oil circuit between the first oil pump 18 and the first check valve 19, and between the second oil pump 20 and the second check valve 21. The second relief valve 22 is connected to the oil tank 1. When the pressure in the oil circuit is too high, the second relief valve 22 opens, allowing the high-pressure hydraulic oil to flow back to the oil tank 1, thereby relieving pressure.

[0031] Preferably, a third pressure gauge 23 is provided in the oil circuit between the first oil pump 18 and the first check valve 19, and between the second oil pump 20 and the second check valve 21, to monitor the oil pressure in real time and improve the safety of the oil circuit.

[0032] Preferably, the first electro-hydraulic directional valve 8, the second electro-hydraulic directional valve 11, and the third electro-hydraulic directional valve 14 are all connected to a return oil passage 24, which is connected to the oil tank 1, so that the hydraulic oil forms a circuit. A third check valve 25 is provided on the return oil passage 24 to prevent the hydraulic oil in the oil tank 1 from flowing back.

[0033] Preferably, a dual-barrel return oil filter 26, a temperature sensor 27, an air filter 28, and a level gauge 29 are installed on the oil tank 1. The return oil circuit 24 is connected to the dual-barrel return oil filter 26 to achieve the filtering effect on the return oil. The temperature sensor 27 can monitor the hydraulic oil temperature in real time, the level gauge 29 can monitor the hydraulic oil level in real time, and the air filter 28 can prevent impurities from entering the oil tank 1.

[0034] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A hydraulic steel scrap bale unpacking machine flow self-distributing hydraulic system comprising a first pump oil circuit and a second pump oil circuit in parallel, and a first control oil circuit, a second control oil circuit and a third control oil circuit in parallel, one end of the first pump oil circuit and the second pump oil circuit are communicated with an oil tank (1), the other end is commonly communicated with a converging oil circuit (2), one end of the first control oil circuit is communicated with a front clamping oil cylinder (3), one end of the second control oil circuit is communicated with a rear clamping oil cylinder (4), one end of the third control oil circuit is communicated with a pulling oil cylinder (5), the other end of the first control oil circuit, the second control oil circuit and the third control oil circuit are communicated with the converging oil circuit (2), characterized in that, The second control oil circuit and the third control oil circuit are provided with a liquid control check valve (6) on the confluence oil circuit (2), the liquid control check valve (6) is electrically connected with an electromagnetic reversing valve (7); the first control oil circuit comprises a first electro-hydraulic reversing valve (8), a first double hydraulic control check valve (9) and a first double check valve (10), the first electro-hydraulic reversing valve (8), the first double hydraulic control check valve (9) and the first double check valve (10) are sequentially installed on the oil circuit between the confluence oil circuit (2) and the front clamping oil cylinder (3); the second control oil circuit comprises a second electro-hydraulic reversing valve (11), a second double hydraulic control check valve (12) and a second double check valve (13), the second electro-hydraulic reversing valve (11), the second double hydraulic control check valve (12) and the second double check valve (13) are sequentially installed on the oil circuit between the confluence oil circuit (2) and the rear clamping oil cylinder (4); the third control oil circuit comprises a third electro-hydraulic reversing valve (14), the output end of the third electro-hydraulic reversing valve (14) is communicated with the drawing oil cylinder (5), and the input end of the third electro-hydraulic reversing valve (14) is communicated with the confluence oil circuit (2).

2. A flow self-distributing hydraulic system for a hydraulic scrap bale unpacker according to claim 1, characterized in that, The oil circuit between the front clamping oil cylinder (3) and the first double check valve (10), the rear clamping oil cylinder (4) and the second double check valve (13), and the drawing oil cylinder (5) and the third electro-hydraulic reversing valve (14) is provided with a first pressure gauge (15).

3. A flow self-distributing hydraulic system for a hydraulic scrap bale unpacker according to claim 1, characterized in that, The oil circuit between the front clamping oil cylinder (3) and the first double check valve (10), the rear clamping oil cylinder (4) and the second double check valve (13), and the drawing oil cylinder (5) and the third electro-hydraulic reversing valve (14) is provided with a first overflow valve (16), and the first overflow valve (16) is communicated with the oil tank (1).

4. A flow self-distributing hydraulic system for a hydraulic scrap bale unpacker according to claim 1, characterized in that, The confluence oil circuit (2) is further provided with a second pressure gauge (17).

5. A flow self-distributing hydraulic system for a hydraulic scrap bale breaker as defined in claim 1, wherein, The first pump oil circuit comprises a first oil pump (18) and a first check valve (19), and the first oil pump (18) and the first check valve (19) are sequentially installed on the oil circuit between the oil tank (1) and the confluence oil circuit (2); the second pump oil circuit comprises a second oil pump (20) and a second check valve (21), and the second oil pump (20) and the second check valve (21) are sequentially installed on the oil circuit between the oil tank (1) and the confluence oil circuit (2).

6. A flow self-distributing hydraulic system for a hydraulic scrap bale breaker according to claim 5, characterized in that, The oil circuit between the first oil pump (18) and the first check valve (19) and the second oil pump (20) and the second check valve (21) is provided with a second overflow valve (22), and the second overflow valve (22) is communicated with the oil tank (1).

7. A flow self-distributing hydraulic system for a hydraulic scrap bale unpacker according to claim 5, wherein, The oil circuit between the first oil pump (18) and the first check valve (19) and the second oil pump (20) and the second check valve (21) is provided with a third pressure gauge (23).

8. A flow self-distributing hydraulic system for a hydraulic scrap bale breaker according to any one of claims 1-7, characterized in that, The first electro-hydraulic reversing valve (8), the second electro-hydraulic reversing valve (11) and the third electro-hydraulic reversing valve (14) are commonly communicated with a return oil circuit (24), the return oil circuit (24) is communicated with the oil tank (1), and the return oil circuit (24) is provided with a third check valve (25).

9. A flow self-distributing hydraulic system for a hydraulic bale breaker according to claim 8, characterized in that, The oil tank (1) is respectively provided with a double-tank oil return filter (26), a temperature sensor (27), an air filter (28) and a liquid level gauge (29), and the oil return oil way (24) is communicated with the double-tank oil return filter (26).

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