A single-acting valve group for a double-bale baling machine

Abstract

A single-acting valve group for a double-bale baling machine, comprising a base plate, an oil inlet P and an oil return T provided on the base plate, and two groups of working ports, first to fourth plate valves provided in sequence above the base plate, the four plate valves are three-position four-way electromagnetic reversing valves and the neutral position function is O type, the P ports of the four plate valves are communicated with the oil inlet P respectively, the T ports are communicated with the oil return T respectively, the A port of the first plate valve and the B port of the second plate valve are communicated with the working ports A1 and B1 respectively, the B port of the first plate valve and the A port of the second plate valve are communicated with the working port C1 respectively; the A port of the third plate valve and the B port of the fourth plate valve are communicated with the working ports A2 and B2 respectively, the B port of the third plate valve and the A port of the fourth plate valve are communicated with the working port C2 respectively. The valve group can realize independent and accurate control of the material compacting cylinder and the bale cylinder, is simple to operate, can directly control a specific oil cylinder to extend or retract alone during failure or debugging, reduces downtime, and effectively improves equipment operation efficiency.

Description

Technical Field

[0001] This utility model relates to a valve assembly, and more particularly to a single-action valve assembly for a double-outlet baler. Background Technology

[0002] In actual operation, the hydraulic valve system of double-outlet balers often faces reliability challenges due to prolonged continuous operation. While the currently widely used integrated or multi-way valve control schemes achieve coordinated multi-cylinder operation to some extent, they still have the following significant drawbacks: First, due to internal leakage in the hydraulic system, the actuator cylinder has difficulty maintaining its initial positioning accuracy, and the cylinder frequently fails to reach the correct position during operation, which seriously affects the bundling quality and the continuity of bale output. Secondly, when silage or hay silage materials become stuck, the existing valve group lacks the ability to independently control individual cylinders, namely the material compaction cylinder and the material unpacking cylinder. It is impossible to control the above cylinders individually without interrupting the overall workflow, resulting in low troubleshooting efficiency, prolonged equipment downtime, and a significant reduction in work efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a single-action valve group for a double-outlet baler that can realize separate control of the material compaction cylinder and the material discharge cylinder, thereby effectively improving the operating efficiency of the equipment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A single-acting valve group for a double-outlet baler includes a base plate. The base plate is provided with an oil inlet P, an oil return port T, and two sets of working ports A1, B1, C1 and A2, B2, C2. The base plate is provided with first to fourth plate valves in sequence. All four plate valves are three-position four-way solenoid directional valves with a middle position function of type O. The P port of the four plate valves is connected to the oil inlet P, and the T port is connected to the oil return port T. The A port of the first plate valve and the B port of the second plate valve are connected to the working ports A1 and B1 respectively. The B port of the first plate valve and the A port of the second plate valve are connected to the working port C1 respectively. This is used to independently control an external material compaction cylinder. Port A of the third plate valve and port B of the fourth plate valve are connected to working ports A2 and B2 respectively. Port B of the third plate valve and port A of the fourth plate valve are connected to working port C2 respectively, which are used to independently control the external material discharging cylinder.

[0005] As a further preferred embodiment, an oil inlet channel and an oil return channel are respectively provided on the base plate at the corresponding oil inlet port P and oil return port T, and the P port and T port of the four plate valves are respectively connected to the oil inlet channel and the oil return channel.

[0006] As a further preferred option, a first overflow valve is installed on the other side of the base plate corresponding to the working port C1. The working port C1 is connected to the oil return port T through the first overflow valve, which is used to limit the working pressure of the external material compaction cylinder.

[0007] As a further preferred option, a second overflow valve is installed on the other side of the base plate corresponding to the working port C2. The working port C2 is connected to the oil return port T through the second overflow valve to limit the working pressure of the external material discharge cylinder.

[0008] As a further preferred option, a filter screen plug is installed in each working port on the base plate to prevent impurities from entering the corresponding plate valve.

[0009] As a further preferred option, a filter screen plug is installed on the base plate inside the oil inlet P to prevent impurities from entering the plate valve.

[0010] The beneficial effects of this utility model are as follows: 1. This valve assembly connects to two sets of working ports on the base plate via the first to fourth plate valves. These working ports are then connected to the material compaction cylinder and the material discharge cylinder of the double-outlet baler, respectively. This allows for independent and precise control of the material compaction cylinder and the material discharge cylinder. The operation is simple, and specific cylinders can be controlled to extend or retract individually during malfunctions or debugging. This significantly improves the equipment's efficiency in handling abnormal conditions such as bag jamming, reduces downtime, and effectively improves the equipment's operating efficiency.

[0011] 2. By optimizing the valve group structure and oil circuit design, the problems of insufficient pressure and delayed action caused by untimely oil replenishment, internal leakage or excessively long oil pipes when the multi-cylinder series operation of the double-outlet baler are effectively solved, ensuring the reliability and stability of the system under long stroke and high load conditions.

[0012] 3. The overall structure is simple and compact, and it can be easily installed with the existing hydraulic valve group of the baler without making major changes to the existing system, which reduces the cost of modification and maintenance, while improving the overall operating efficiency and automation level of the machine. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 yes Figure 1 A bottom view.

[0015] Figure 3 yes Figure 1 The right view.

[0016] Figure 4 yes Figure 2 A partial sectional view.

[0017] Figure 5 This is a hydraulic schematic diagram of this utility model.

[0018] In the diagram: First plate valve 1, second plate valve 2, third plate valve 3, fourth plate valve 4, second overflow valve 5, first overflow valve 6, bottom plate 7, oil inlet channel 701, oil return channel 702, filter plug 8. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] like Figure 1-5 As shown, the present invention relates to a single-action valve group for a double-outlet baler, including a base plate 7, an oil inlet P and an oil return port T at one end of the base plate 7, and two sets of working ports on one side of the base plate 7, namely working ports A1, B1, C1 and working ports A2, B2, C2.

[0021] A first plate valve 1, a second plate valve 2, a third plate valve 3, and a fourth plate valve 4 are sequentially fixed to the base plate 7 using screws. All four plate valves are three-position four-way solenoid directional valves with an O-type neutral position. The P port of each of the four plate valves is connected to the oil inlet P, and the T port is connected to the oil return port T. The A port of the first plate valve 1 and the B port of the second plate valve 2 are connected to the working ports A1 and B1 respectively via internal oil passages. The B port of the first plate valve 1 and the A port of the second plate valve 2 are connected to the working port C1 respectively via internal oil passages, used for independently controlling the external material compaction cylinder. The A port of the third plate valve 3 and the B port of the fourth plate valve 4 are connected to the working ports A2 and B2 respectively. The B port of the third plate valve 3 and the A port of the fourth plate valve 4 are connected to the working port C2, used for independently controlling the external material unloading cylinder.

[0022] An oil inlet channel 701 and an oil return channel 702 are respectively provided on the base plate 7 at the oil inlet P and the oil return channel T. The P port and T port of the four plate valves are respectively connected to the oil inlet channel 701 and the oil return channel 702, and are connected to the oil inlet P and the oil return channel T through the oil inlet channel 701 and the oil return channel 702.

[0023] On the other side of the base plate 7 corresponding to the working port C1, a first overflow valve 6 is installed by thread. The working port C1 is connected to the oil return port T through the first overflow valve 6, which is used to limit the working pressure of the external material compaction cylinder.

[0024] A second overflow valve 5 is installed on the other side of the base plate 7 corresponding to the working port C2 via a thread. The working port C2 is connected to the return oil port T through the second overflow valve, which is used to limit the working pressure of the external material discharge cylinder.

[0025] A filter screen plug 8 is installed on the base plate 7 in each working port via a threaded connection to prevent impurities from entering the corresponding plate valve. A filter screen plug 8 is also installed on the base plate 7 in the oil inlet P to prevent impurities from entering the plate valve.

[0026] In use, the oil inlet P of the single-acting valve group is connected to the replenishment port of the main control valve group of the double-outlet baler, and the oil return port T is connected to the oil tank. The working ports A1 and B1 are respectively connected to the rodless chambers of the two material compaction cylinders through oil circuits. The working port C1 is connected to the series oil circuit between the rod chambers of the two material compaction cylinders through a T-junction. The working ports A2 and B2 are respectively connected to the rodless chambers of the two material outlet cylinders through oil circuits. The working port C2 is connected to the series oil circuit between the rod chambers of the two material outlet cylinders through a T-junction.

[0027] The working principle of this single-acting valve assembly for replenishing fluid is as follows: 1. When the left material compaction cylinder is working under the control of the main control valve group of the double-outlet baler, if the right material compaction cylinder malfunctions and fails to rise to the correct position, a signal is sent to the baler controller through the corresponding limit switch. The controller then energizes the electromagnet at the left end of the second plate valve 2, causing the second plate valve 2 to switch to the left position. This allows the pressurized oil entering through the oil inlet P to enter the rod chamber of the right material compaction cylinder through the working port C1. The rodless chamber of the right material compaction cylinder returns to the oil tank through the working port B1, the second plate valve 2, and the return port T, causing the right material compaction cylinder to rise to the initial position. After transmitting an electrical signal to the second plate valve 2 through the limit switch, the second plate valve 2 returns to the middle position.

[0028] When the material compaction cylinder on the right is working under the control of the main control valve group of the double-outlet baler, if the material compaction cylinder on the left malfunctions and fails to rise to the correct position, a signal is sent to the baler controller via a limit switch. The controller then energizes the electromagnet at the right end of the first plate valve 1, causing the first plate valve 1 to switch to the right position. This allows the pressurized oil entering through the oil inlet P to enter the rod chamber of the left material compaction cylinder through the working port C1. The rodless chamber of the left material compaction cylinder returns to the oil tank through the working port A1, the first plate valve 1, and the return port T, causing the left material compaction cylinder to rise to the initial position. After transmitting an electrical signal to the first plate valve 1 via the limit switch, the first plate valve 1 returns to the neutral position.

[0029] 2. When the material discharge cylinder on the left is working under the control of the main control valve group of the double discharge baler, if the material discharge cylinder on the right malfunctions and fails to retract to its original position, a signal is sent to the baler controller through the corresponding limit switch. The controller then energizes the electromagnet at the left end of the fourth plate valve 4, causing the fourth plate valve 4 to switch to the left position. This allows the pressurized oil entering through the oil inlet P to enter the rod chamber of the right material discharge cylinder through the working port C2. The rodless chamber of the right material discharge cylinder returns to the oil tank through the working port B2, the fourth plate valve 4, and the return port T, causing the right material compaction cylinder to retract to its initial position. After transmitting an electrical signal to the fourth plate valve 4 through the limit switch, the fourth plate valve 4 returns to the middle position.

[0030] When the material discharge cylinder on the right side is operating under the control of the main control valve group of the double-discharge baler, if the material discharge cylinder on the left side malfunctions and fails to retract to its original position, a signal is sent to the baler controller via the corresponding limit switch. The controller then energizes the electromagnet at the right end of the third plate valve 3, causing the third plate valve 3 to switch to the right position. This allows the pressurized oil entering through the oil inlet P to enter the rod chamber of the left material discharge cylinder through the working port C2. The rodless chamber of the left material discharge cylinder returns to the oil tank through the working port A2, the third plate valve 3, and the return port T, causing the left material compaction cylinder to retract to its initial position. After transmitting an electrical signal to the third plate valve 3 via the limit switch, the third plate valve 3 returns to the neutral position.

[0031] The single-acting working principle of this single-acting valve assembly is as follows: 1. When the baler is working and the left material compaction cylinder becomes stuck and cannot compact, the main control valve group stops working. The first valve 1 is operated independently, energizing its right-hand electromagnet. This allows pressurized oil entering through inlet P to flow through working port C1 into the rod chamber of the left material compaction cylinder. Because the second valve 2 connected to the rodless chamber of the right material compaction cylinder is in the cut-off position, only the left material compaction cylinder retracts slightly. Then, the left-hand electromagnet of the first valve 1 is energized, causing the first valve 1 to switch to the left position. This allows hydraulic oil entering through inlet P to flow through working port A1 into the rodless chamber of the left material compaction cylinder. The rod chamber returns to the oil tank through return port T, causing the left material compaction cylinder to resume pressing. Simultaneously, because the second valve 2 corresponding to the right material compaction cylinder is in the neutral position, the right material compaction cylinder remains stationary.

[0032] When the baler is working and the right-side material compaction cylinder becomes stuck and cannot compact, the main control valve group stops working. The second valve 2 is then operated independently, energizing its left-side solenoid. This allows pressurized oil entering through inlet P to flow through working port C1 into the rod chamber of the right-side material compaction cylinder. Since the first valve 1 connected to the rodless chamber of the left-side material compaction cylinder is in the cut-off position, only the right-side material compaction cylinder retracts slightly. Then, the right-side solenoid of the second valve 2 is energized, causing the valve to switch to the right position. This allows hydraulic oil entering through inlet P to flow through working port B1 into the rodless chamber of the right-side material compaction cylinder. The rod chamber returns to the oil tank through return port T, causing the right-side material compaction cylinder to resume pressing. Simultaneously, since the second valve 2 corresponding to the left-side material compaction cylinder is in the neutral position, the left-side material compaction cylinder remains stationary.

[0033] 2. When the baler is working and the left material discharge cylinder is stuck and unable to extend, the main control valve group stops working. The third valve 3 is operated independently, energizing its right electromagnet. This allows pressurized oil entering through inlet P to flow through working port C2 into the rod chamber of the left material discharge cylinder. Since the fourth valve 4 connected to the rodless chamber of the right material discharge cylinder is in the cut-off position, only the left material discharge cylinder retracts slightly. Then, the left electromagnet of the third valve 3 is energized, causing the valve to switch to the left position. This allows hydraulic oil entering through inlet P to flow through working port A2 into the rodless chamber of the left material discharge cylinder. The rod chamber returns to the oil tank through return port T, causing the left material discharge cylinder to extend again. Simultaneously, since the fourth valve 4 corresponding to the right material discharge cylinder is in the neutral position, the right material discharge cylinder remains stationary.

[0034] When the baler is working and the right-side material ejection cylinder is stuck and unable to extend, the main control valve group stops working. The fourth valve 4 is then operated independently, energizing its left electromagnet. This allows pressurized oil entering through inlet P to flow through working port C2 into the rod chamber of the right-side material ejection cylinder. Because the third valve 3, connected to the rodless chamber of the left-side material ejection cylinder, is in the cut-off position, only the right-side material ejection cylinder retracts slightly. Then, the right-side electromagnet of the fourth valve 4 is energized, causing the valve to switch to the right position. This allows hydraulic oil entering through inlet P to flow through working port B2 into the rodless chamber of the right-side material ejection cylinder. The rod chamber returns to the oil tank through return port T, allowing the right-side material ejection cylinder to extend and push material again. Simultaneously, because the third valve 3 corresponding to the left-side material ejection cylinder is in the neutral position, the left-side material ejection cylinder remains stationary.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A single-acting valve assembly for a double-outlet baler, comprising a base plate, characterized in that: The base plate is equipped with an oil inlet P, an oil return port T, and two sets of working ports A1, B1, C1 and A2, B2, C2. The base plate is equipped with the first to fourth plate valves in sequence. All four plate valves are three-position four-way solenoid directional valves with a neutral position function of type O. The P port of the four plate valves is connected to the oil inlet P, and the T port is connected to the oil return port T. The A port of the first plate valve and the B port of the second plate valve are connected to the working ports A1 and B1 respectively. The B port of the first plate valve and the A port of the second plate valve are connected to the working port C1 respectively. This is used to control the external material compaction cylinder independently. Port A of the third plate valve and port B of the fourth plate valve are connected to working ports A2 and B2 respectively. Port B of the third plate valve and port A of the fourth plate valve are connected to working port C2 respectively, which are used to independently control the external material discharging cylinder.

2. A single-acting valve assembly for a double-outlet baler according to claim 1, characterized in that: An oil inlet channel and an oil return channel are respectively provided at the oil inlet P and oil return channel T on the base plate, and the P port and T port of the four plate valves are respectively connected to the oil inlet channel and the oil return channel.

3. A single-acting valve assembly for a double-outlet baler according to claim 1, characterized in that: A first overflow valve is installed on the other side of the base plate corresponding to the working port C1. The working port C1 is connected to the oil return port T through the first overflow valve, which is used to limit the working pressure of the external material compaction cylinder.

4. A single-acting valve assembly for a double-outlet baler according to claim 1 or 3, characterized in that: A second overflow valve is installed on the other side of the base plate corresponding to the working port C2. The working port C2 is connected to the oil return port T through the second overflow valve, which is used to limit the working pressure of the external material discharge cylinder.

5. A single-acting valve assembly for a double-outlet baler according to claim 4, characterized in that: A filter screen plug is installed in each working port on the base plate to prevent impurities from entering the corresponding plate valve.

6. A single-acting valve assembly for a double-outlet baler according to claim 1 or 5, characterized in that: A filter screen is installed inside the oil inlet P on the base plate to prevent impurities from entering the plate valve.

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