A slip-form paver distribution motor hydraulic control system and slip-form paver

Abstract

The utility model discloses a kind of hydraulic control system and slipform paver of slipform paver distribution motor, including distribution motor, three-position four-way electromagnetic proportional reversing valve, three-position four-way electromagnetic valve, electromagnetic ball valve;The P1 port of three-position four-way electromagnetic proportional reversing valve is connected with hydraulic oil source P, T1 port is connected with hydraulic oil tank T, A1 port is connected with the R port of left distribution motor, B1 port is connected with the L port of right distribution motor;The A2 port of three-position four-way electromagnetic valve is connected with the A1 port of three-position four-way electromagnetic proportional reversing valve, B2 port is connected with the B1 port of three-position four-way electromagnetic proportional reversing valve, A3 port is connected with the L port of left distribution motor, B3 port is connected with the R port of right distribution motor;Left electromagnetic ball valve is connected in series on the intercommunication pipeline between A2 port and A1 port, right electromagnetic ball valve is connected in series on the intercommunication pipeline between B2 port and B1 port.The utility model realizes the adaptation of multiple working conditions such as low torque high speed, high torque low speed and unilateral distribution.

Description

Technical Field

[0001] This utility model relates to a hydraulic control system for the material distribution motor of a slipform paver and a slipform paver, belonging to the field of slipform pavers. Background Technology

[0002] The material distribution auger of a slipform paver is the core working device of a wide slipform paver. Its core function is to unload cement concrete material from the material truck to the front of the paver, and achieve uniform material distribution through the rotation of the auger. It accurately delivers the material to the entire working width of the paver, ensuring the continuity and uniformity of material feeding into the hopper behind the material distribution auger, thereby providing core assurance for key quality indicators such as flatness and compaction in slipform paving operations.

[0003] Currently, slipform pavers commonly employ a dual-motor independent drive system for the material distribution auger. The two motors are typically connected in parallel, and each requires an independent proportional directional valve to control its rotation direction and speed. This traditional structure presents several technical challenges: Firstly, for the "low torque, high speed" material distribution conditions, both motors require a large flow of hydraulic oil simultaneously, placing stringent demands on the hydraulic pump's output flow rate. This necessitates the use of large-displacement hydraulic pumps, directly increasing the design and manufacturing costs of the hydraulic system. Secondly, the dual-motor, dual-proportional directional valve control mode not only increases valve assembly procurement costs but also enhances the complexity of the system's piping layout, further compounding the overall equipment cost and the difficulty of subsequent maintenance. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model provides a hydraulic control system for the material distribution motor of a slipform paver and a slipform paver itself. This effectively reduces the flow rate requirement of the material distribution motor for hydraulic oil and reduces the number of proportional directional valves required. While reducing the design and manufacturing costs of the hydraulic system, it enables adaptation to multiple working conditions such as low torque and high speed, high torque and low speed, and single-sided material distribution. This simplifies the later maintenance process of the equipment and improves the convenience of operation and maintenance.

[0005] To achieve the above objectives, this utility model employs a hydraulic control system for the material distribution motor of a slipform paver, including a left material distribution motor and a right material distribution motor. The left material distribution motor is connected to the left material distribution auger of the slipform paver, and the right material distribution motor is connected to the right material distribution auger of the slipform paver. It also includes a three-position four-way electromagnetic proportional directional valve, a three-position four-way electromagnetic valve, a left electromagnetic ball valve, and a right electromagnetic ball valve. The three-position four-way electromagnetic proportional directional valve has its P1 port connected to the hydraulic oil source P, its T1 port connected to the hydraulic oil tank T, its A1 port connected to the R port of the left dispensing motor, and its B1 port connected to the L port of the right dispensing motor, which is used to control the rotation direction and speed of the left and right dispensing motors. The A2 port of the three-position four-way solenoid valve is connected to the A1 port of the three-position four-way solenoid proportional directional valve, the B2 port is connected to the B1 port of the three-position four-way solenoid proportional directional valve, the A3 port is connected to the L port of the left feed motor, and the B3 port is connected to the R port of the right feed motor. The left solenoid ball valve is connected in series in the connecting pipeline between port A2 of the three-position four-way solenoid valve and port A1 of the three-position four-way solenoid proportional directional valve. The right solenoid ball valve is connected in series in the connecting pipeline between port B2 of the three-position four-way solenoid valve and port B1 of the three-position four-way solenoid proportional directional valve. The left and right solenoid ball valves cooperate with the three-position four-way solenoid valve to realize the switching of the left and right dispensing motors in series, parallel and individual operation modes.

[0006] As an improvement, when the Y1 electromagnet of the three-position four-way electromagnetic proportional directional valve is energized, the left and right dispensing motors rotate synchronously in the forward direction; when the Y2 electromagnet is energized, the left and right dispensing motors rotate synchronously in the reverse direction.

[0007] As an improvement, when the three-position four-way solenoid valve and the two solenoid ball valves are all de-energized, the left and right dispensing motors form a series circuit.

[0008] As an improvement, when the Y6 electromagnet of the three-position four-way solenoid valve, the Y3 electromagnet of the left solenoid ball valve, and the Y4 electromagnet of the right solenoid ball valve are all energized, the left and right dispensing motors operate in parallel.

[0009] As an improvement, when the Y6 electromagnet of the three-position four-way solenoid valve and the Y4 electromagnet of the right solenoid ball valve are energized and the left solenoid ball valve is de-energized, the left dispensing motor operates independently; when the Y6 electromagnet of the three-position four-way solenoid valve and the Y3 electromagnet of the left solenoid ball valve are energized and the right solenoid ball valve is de-energized, the right dispensing motor operates independently.

[0010] As an improvement, when the Y5 electromagnet of the three-position four-way solenoid valve, the Y3 electromagnet of the left solenoid ball valve, and the Y4 electromagnet of the right solenoid ball valve are all energized, the inlet and outlet oil ports of the left and right material dispensing motors are connected respectively, and the material dispensing spiral can be manually rotated to clean the material.

[0011] As an improvement, the left and right electromagnetic ball valves are two-position, two-way valves, which are energized to open and de-energized to close.

[0012] In a second aspect, this utility model also provides a slipform paver, wherein the slipform paver is equipped with the aforementioned slipform paver material distribution motor hydraulic control system.

[0013] Compared with existing technologies, this utility model achieves flexible switching between series, parallel, and individual operation modes of the left and right material distribution motors through the coordinated operation of a three-position four-way electromagnetic proportional directional valve, a three-position four-way solenoid valve, and left and right electromagnetic ball valves. It can accurately adapt to the needs of different material distribution conditions of slipform pavers: under low torque and high speed conditions, the left and right material distribution motors operate in series, effectively reducing the system's flow requirement for hydraulic oil, eliminating the need for a large-displacement hydraulic pump, and significantly reducing the design and manufacturing costs of the hydraulic system; at the same time, this system uses only one three-position four-way electromagnetic proportional directional valve to realize the steering and speed control of the left and right material distribution motors, replacing the configuration of multiple proportional valves in the traditional solution, and instead using lower-cost three-position four-way solenoid valves and electromagnetic ball valves, further reducing the valve group procurement and system integration costs. In addition, by switching the three-position four-way solenoid valve on and off with the left and right solenoid ball valves, the inlet and outlet oil ports of the left and right distributing motors can be directly connected, allowing the distributing screw to rotate freely by external force. This facilitates the thorough cleaning of residual cement and concrete materials on the distributing screw after construction, significantly improving the convenience of equipment maintenance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram illustrating the structural principle of this utility model; In the diagram: 1. Three-position four-way electromagnetic proportional directional valve; 2. Left electromagnetic ball valve; 3. Right electromagnetic ball valve; 4. Three-position four-way electromagnetic valve; 5. Right feed motor; 6. Left feed motor. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this application will be described in detail below through specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] like Figure 1 As shown, a hydraulic control system for the material distribution motor of a slipform paver is disclosed. The system mainly includes an actuator and a control valve group. The actuator consists of a left material distribution motor 6 and a right material distribution motor 5. The control valve group includes a three-position four-way electromagnetic proportional directional valve 1, a three-position four-way electromagnetic valve 4, a left electromagnetic ball valve 2, and a right electromagnetic ball valve 3. The output end of the left material distribution motor 6 is connected to the left material distribution auger of the slipform paver and is used to drive the left material distribution auger to rotate so as to achieve uniform conveying of material on the left side; the output end of the right material distribution motor 5 is connected to the right material distribution auger of the slipform paver and is used to drive the right material distribution auger to rotate so as to achieve uniform conveying of material on the right side. The two material distribution motors are the actuators of the system and respectively control the operation of the left and right material distribution augers. They are the core power components for material conveying. The three-position four-way electromagnetic proportional directional valve 1 serves as the main control valve of the system. Its inlet port P1 is connected to the external hydraulic oil source P, its return port T1 is connected to the hydraulic oil tank T, its working port A1 is connected to the oil port R of the left material distribution motor 6, and its working port B1 is connected to the oil port L of the right material distribution motor 5. This proportional directional valve can synchronously control the rotation direction and speed of the left and right material distribution motors by adjusting the on / off state of the electromagnet and the magnitude of the input current, thereby flexibly adapting to the different material distribution speed requirements of the slipform paver. The three-position four-way solenoid valve 4 serves as an auxiliary directional valve. Its A2 port is connected to the A1 port of the three-position four-way electromagnetic proportional directional valve 1, and its B2 port is connected to the B1 port of the three-position four-way electromagnetic proportional directional valve 1. At the same time, its A3 port is connected to the oil port L of the left feed motor 6, and its B3 port is connected to the oil port R of the right feed motor 5. It is mainly used to cooperate with the solenoid ball valve to complete the opening and closing of the hydraulic circuit and the path switching. The left solenoid ball valve 2 is connected in series in the hydraulic connection pipeline between port A2 of the three-position four-way solenoid valve 4 and port A1 of the three-position four-way solenoid proportional directional valve 1, specifically controlling the hydraulic oil flow of this branch; the right solenoid ball valve 3 is connected in series in the hydraulic connection pipeline between port B2 of the three-position four-way solenoid valve 4 and port B1 of the three-position four-way solenoid proportional directional valve 1, specifically controlling the hydraulic oil flow of this branch; the left and right solenoid ball valves and the three-position four-way solenoid valve 4 work together to achieve precise and flexible switching between series operation, parallel operation and individual operation modes of the left and right material distribution motors according to the actual material distribution conditions required by the slipform paver during construction, thereby matching different construction conditions such as "low torque and high speed", "high torque and low speed" and single-sided material distribution, ensuring the stability and adaptability of material distribution operations.

[0019] In some embodiments, such as Figure 1 As shown, when the Y1 solenoid of the three-position four-way electromagnetic proportional directional valve 1 is energized, the valve core moves to change the flow path of the hydraulic oil, driving the left and right distributing motors to rotate synchronously in the forward direction, thus driving the distributing screw to convey materials in the forward direction; when the Y2 solenoid of the proportional directional valve is energized, the valve core moves in the reverse direction, the flow direction of the hydraulic oil is switched, thereby driving the left and right distributing motors to rotate synchronously in the reverse direction, realizing the reverse material conveying of the distributing screw, thus completing the forward and reverse operation control of the distributing screw.

[0020] In a specific embodiment of the working condition switching, when the valve core of the three-position four-way solenoid valve 4 is in the middle position and both the left solenoid ball valve 2 and the right solenoid ball valve 3 are de-energized, the left and right material distribution motors form a series circuit with the hydraulic pipeline through the internal channel of the three-position four-way solenoid valve 4. In this mode, the hydraulic oil flows through the two material distribution motors in sequence, which can be adapted to the light-load material distribution working condition of the slipform paver with "low torque and high speed". When the Y6 solenoid of the three-position four-way solenoid valve 4, the Y3 solenoid of the left solenoid ball valve 2, and the Y4 solenoid of the right solenoid ball valve 3 are simultaneously energized, the valve core of the three-position four-way solenoid valve 4 reverses, and the left and right solenoid ball valves are synchronously opened. Hydraulic oil can be supplied to the left and right dispensing motors respectively, so that the two dispensing motors form a parallel circuit. In this mode, the system output torque is greater and can adapt to the heavy-duty dispensing conditions of "high torque and low speed".

[0021] Furthermore, when the Y6 electromagnet of the three-position four-way solenoid valve 4 and the Y4 electromagnet of the right solenoid ball valve 3 are energized and the left solenoid ball valve 2 is de-energized, only the left material distribution motor 6 is connected to the hydraulic circuit and operates independently, while the right material distribution motor 5 is in an open circuit state; when the Y6 electromagnet of the three-position four-way solenoid valve 4 and the Y3 electromagnet of the left solenoid ball valve 2 are energized and the right solenoid ball valve 3 is de-energized, only the right material distribution motor 5 is connected to the hydraulic circuit and operates independently, while the left material distribution motor 6 is in an open circuit state. These two independent operation modes can accurately meet the construction needs of single-sided material distribution of the slipform paver.

[0022] In other embodiments, when the Y5 electromagnet of the three-position four-way solenoid valve 4, the Y3 electromagnet of the left solenoid ball valve 2, and the Y4 electromagnet of the right solenoid ball valve 3 are all energized, the valve core of the three-position four-way solenoid valve 4 switches to the position connecting the inlet and outlet of the motor. The inlet and outlet of the left and right distributing motors will form a connected circuit. At this time, there is no hydraulic oil pressure constraint inside the distributing motor, and the distributing screw can be easily rotated manually by external force, which is convenient for operators to clean the residual cement and concrete materials on the distributing screw and reduce the difficulty of equipment maintenance. At the same time, the left solenoid ball valve 2 and the right solenoid ball valve 3 both adopt a two-position two-way solenoid ball valve structure. Its working logic is that when energized, the valve core inside the valve is open and the hydraulic branch is unobstructed; when de-energized, the valve core resets and closes, and the hydraulic branch is disconnected. This can realize rapid response and precise switching of the hydraulic branch, ensuring the timeliness and stability of the circuit mode switching.

[0023] In a second aspect, this utility model also provides a slipform paver, wherein the material distribution system of the slipform paver is equipped with the aforementioned slipform paver material distribution motor hydraulic control system. With the help of the forward and reverse rotation control, multi-condition mode switching and convenient cleaning function of the system, the slipform paver's adaptability to different material distribution construction scenarios can be significantly improved, while reducing equipment maintenance costs and improving construction efficiency.

[0024] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this utility model and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

Claims

1. A hydraulic control system for the material distribution motors of a slipform paver, comprising a left material distribution motor (6) and a right material distribution motor (5), wherein the left material distribution motor (6) is connected to the left material distribution auger of the slipform paver, and the right material distribution motor (5) is connected to the right material distribution auger of the slipform paver, characterized in that, It also includes a three-position four-way electromagnetic proportional directional valve (1), a three-position four-way solenoid valve (4), a left solenoid ball valve (2) and a right solenoid ball valve (3). The three-position four-way electromagnetic proportional directional valve (1) has its P1 port connected to the hydraulic oil source P, its T1 port connected to the hydraulic oil tank T, its A1 port connected to the R port of the left feed motor (6), and its B1 port connected to the L port of the right feed motor (5), which is used to control the rotation direction and speed of the left and right feed motors. The A2 port of the three-position four-way solenoid valve (4) is connected to the A1 port of the three-position four-way solenoid proportional directional valve (1), the B2 port is connected to the B1 port of the three-position four-way solenoid proportional directional valve (1), the A3 port is connected to the L port of the left feed motor (6), and the B3 port is connected to the R port of the right feed motor (5). The left solenoid ball valve (2) is connected in series in the connecting pipeline between port A2 of the three-position four-way solenoid valve (4) and port A1 of the three-position four-way solenoid proportional valve (1). The right solenoid ball valve (3) is connected in series in the connecting pipeline between port B2 of the three-position four-way solenoid valve (4) and port B1 of the three-position four-way solenoid proportional valve (1). The left and right solenoid ball valves cooperate with the three-position four-way solenoid valve (4) to realize the switching of the left and right dispensing motors in series, parallel and individual operation modes.

2. The hydraulic control system for the material distribution motor of a slipform paver according to claim 1, characterized in that, When the Y1 electromagnet of the three-position four-way electromagnetic proportional directional valve (1) is energized, the left and right dispensing motors rotate synchronously in the forward direction; when the Y2 electromagnet is energized, the left and right dispensing motors rotate synchronously in the reverse direction.

3. The hydraulic control system for the material distribution motor of a slipform paver according to claim 1, characterized in that, When the three-position four-way solenoid valve (4) and the two solenoid ball valves are de-energized, the left and right feed motors form a series circuit.

4. The hydraulic control system for the material distribution motor of a slipform paver according to claim 1, characterized in that, When the Y6 electromagnet of the three-position four-way solenoid valve (4), the Y3 electromagnet of the left solenoid ball valve (2), and the Y4 electromagnet of the right solenoid ball valve (3) are all energized, the left and right dispensing motors run in parallel.

5. The hydraulic control system for the material distribution motor of a slipform paver according to claim 1, characterized in that, When the Y6 electromagnet of the three-position four-way solenoid valve (4) and the Y4 electromagnet of the right solenoid ball valve (3) are energized and the left solenoid ball valve (2) is de-energized, the left feed motor (6) operates independently; when the Y6 electromagnet of the three-position four-way solenoid valve (4) and the Y3 electromagnet of the left solenoid ball valve (2) are energized and the right solenoid ball valve (3) is de-energized, the right feed motor (5) operates independently.

6. The hydraulic control system for the material distribution motor of a slipform paver according to claim 1, characterized in that, When the Y5 electromagnet of the three-position four-way solenoid valve (4), the Y3 electromagnet of the left solenoid ball valve (2), and the Y4 electromagnet of the right solenoid ball valve (3) are all energized, the inlet and outlet ports of the left and right material distribution motors are connected respectively, and the material distribution spiral can be manually rotated to clean the material.

7. The hydraulic control system for the material distribution motor of a slipform paver according to claim 1, characterized in that, The left solenoid ball valve (2) and the right solenoid ball valve (3) are two-position two-way valves, which are turned on when energized and turned off when de-energized.

8. A slipform paver, characterized in that, The slipform paver is equipped with a slipform paver material distribution motor hydraulic control system as described in any one of claims 1-7.

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