A hydraulic motor drive control system and method for a dual-hose reel

Abstract

The application discloses a double-water-hose reel hydraulic motor driving control system and method, and the control system comprises an engine, a hydraulic pump, a proportional reversing valve connected with the hydraulic pump, a motor assembly connected with the proportional reversing valve, wherein the motor assembly comprises a first motor and a second motor, an oil path switching valve connected between the motor assembly and the proportional reversing valve, and a main overflow valve connected between the hydraulic pump and the proportional reversing valve. The application realizes the selection and switching of different oil paths through the oil path switching valve, and then realizes the independent operation or synchronous operation of the first motor or the second motor. The forward rotation and reverse rotation of the first motor or the second motor are realized through the proportional reversing valve, and the single floating operation of the first motor or the second motor and the simultaneous floating operation of the first motor and the second motor are realized through the setting of the floating switching valve. The above method realizes the multi-operation mode switching of the laying and winding of single / double water hoses.

Description

Technical Field

[0001] The present invention belongs to the technical field of hose laying vehicles, and in particular relates to a double hose reel hydraulic motor drive control system and method. Background Art

[0002] The hose laying vehicle is used in conjunction with the drainage vehicle to address the low efficiency of manual hose laying. The hose laying mechanism is a dual-station mechanism, capable of laying a single hose independently or simultaneously. As an emergency rescue vehicle, maneuverability and convenience are extremely high requirements, and the synchronization and maneuverability of hose laying and retracting, as well as controllability, significantly impact the overall vehicle's performance.

[0003] In the existing technology, the hose laying and reeling system is a parallel motor control system. The left and right hose reel motors are independently controlled by two proportional reversing valves. The synchronous reeling of the hose requires high synchronization control accuracy of the two proportional reversing valves. Some proportional valves cannot meet the synchronization control accuracy requirements of the hose reel motor. At the same time, due to the manufacturing differences of the components of each connected reversing valve, each vehicle requires manual participation to adjust and match the parameters, which is time-consuming and labor-intensive. Furthermore, since the flow rate of the parallel hydraulic system needs to meet the flow rate when the two motors operate in parallel, it needs to be matched with a larger displacement hydraulic pump, which is costly. When the motor operates alone, it will cause flow waste and system heating.

[0004] In actual construction, manual rotation of the hose reel head to align it with the installation joint, or passive dragging of the hose during installation, requires the hose reel motor to have a floating function. Existing technologies lack this floating function, significantly impacting the operability and convenience of the equipment. Summary of the Invention

[0005] The purpose of the present invention is to provide a dual hose reel hydraulic motor drive control system and method to solve the technical problems in the prior art of single hose laying and reeling working mode, low synchronous control accuracy and great adjustment difficulty.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a dual hose reel hydraulic motor drive control system comprising an engine, a hydraulic pump connected to the engine, the hydraulic pump connected to a proportional reversing valve for changing the direction of an oil inlet, and a motor assembly connected to the proportional reversing valve;

[0008] The motor assembly includes a first motor and a second motor, and an oil circuit switching valve for switching between independent operation and synchronous operation modes of the motors is connected between the motor assembly and the proportional reversing valve;

[0009] A main overflow valve for limiting the maximum pressure of the hydraulic system is also connected between the hydraulic pump and the proportional reversing valve.

[0010] The hydraulic pump outputs oil that passes through the proportional reversing valve and the oil circuit switching valve and enters the first motor or the second motor. The independent operation or synchronous operation of the first motor or the second motor is achieved by selecting and switching different oil circuits in the oil circuit switching valve, and the forward and reverse rotation of the first motor or the second motor is achieved by switching the proportional reversing valve.

[0011] Optionally, the hydraulic pump is further connected to a floating switching valve for realizing motor floating operation, and the output end of the floating switching valve is correspondingly connected to the housing oil drain chambers of the first motor and the second motor.

[0012] The floating switching valve is selectively switched to realize the independent floating operation of the first motor or the second motor, or the synchronous floating operation of the first motor and the second motor.

[0013] Optionally, the oil circuit switching valve includes a first two-position three-way reversing valve, a second two-position three-way reversing valve and a third two-position three-way reversing valve, which are selectively connected to realize the switching of the first motor and the second motor between independent operation and synchronous operation mode in the system.

[0014] Optionally, the floating switching valve includes a first two-position two-way reversing valve, a second two-position two-way reversing valve, a pressure reducing valve and a third two-position three-way reversing valve;

[0015] The first motor is further connected to a first shuttle valve and a second two-position two-way reversing valve, and the second motor is further connected to a second shuttle valve and the first two-position two-way reversing valve;

[0016] The hydraulic pump is connected to the pressure reducing valve and the third two-position three-way reversing valve, and the third two-position three-way reversing valve is connected to the first motor and the second motor.

[0017] Optionally, the first motor and the second motor are both radial piston motors.

[0018] In the above scheme, by setting an oil circuit switching valve, the first motor and the second motor can be connected in series in the hydraulic circuit to work synchronously, realizing the switching between independent operation and synchronous operation modes, and in conjunction with the use of a proportional reversing valve, the independent forward and reverse rotation and synchronous forward and reverse rotation of the first motor and the second motor can be realized, and by setting a floating switching valve, the first motor or the second motor of the product can realize synchronous floating operation or independent floating operation, realizing convenient switching of multiple operation modes of single / double water hose laying and winding.

[0019] In a second aspect, the present invention further provides a dual hose reel hydraulic motor drive control method according to the first aspect, comprising:

[0020] Control the oil circuit switching valve to realize independent action or series synchronous action of the first motor and the second motor;

[0021] The proportional reversing valve is controlled to realize forward and reverse rotation of the first motor and the second motor, thereby realizing stepless speed regulation of the first motor and the second motor.

[0022] Optionally, the proportional reversing valve is controlled to work in the right position when it is energized, the third two-position three-way reversing valve is controlled to work in the left position when it is energized, the second two-position three-way reversing valve is controlled to work in the left position when it is energized, and the first two-position three-way reversing valve is controlled to work in the left position when it is not energized. At this time, the first motor rotates forward independently;

[0023] The proportional reversing valve is controlled to work in the left position, and the first two-position three-way reversing valve, the second two-position three-way reversing valve and the third two-position three-way reversing valve are controlled in the same way as when the first motor rotates forward. At this time, the first motor reverses independently.

[0024] Optionally, the proportional reversing valve is controlled to work in the right position when it is energized, the third two-position three-way reversing valve is controlled to work in the right position when it is not energized, the second two-position three-way reversing valve is energized to work in the left position, and the first two-position three-way reversing valve is energized to work in the right position. At this time, the second motor rotates forward independently;

[0025] The proportional directional control valve is energized in the left position, and the first two-position three-way directional control valve, the second two-position three-way directional control valve and the third two-position three-way directional control valve are energized in the same way as when the second motor rotates forward. At this time, the second motor rotates reversely independently.

[0026] Optionally, the proportional reversing valve is controlled to be energized in the right position, and the first two-position three-way reversing valve, the second two-position three-way reversing valve and the third two-position three-way reversing valve are all de-energized. At this time, the first motor and the second motor are connected in series and rotate synchronously in the forward direction.

[0027] The proportional reversing valve is controlled to be energized and work in the left position, and the energization conditions of the first two-position three-way reversing valve, the second two-position three-way reversing valve and the third two-position three-way reversing valve are the same as those when the first motor and the second motor rotate forward synchronously. At this time, the first motor and the second motor are connected in series and reverse synchronously.

[0028] Optionally, controlling the floating switching valve to achieve floating operation of the first motor and the second motor includes:

[0029] The engine is controlled to run at idle speed, the hydraulic pump to run at low flow, the third two-position three-way reversing valve is controlled to be energized and run, the oil reaches the left position of the third two-position three-way reversing valve through the pressure reducing valve, and then reaches the oil drain chamber of the housing of the first motor and the second motor. The second two-position two-way reversing valve or the first two-position two-way reversing valve is controlled to return oil through the first shuttle valve or the second shuttle valve after being energized, so as to realize the floating operation of the first motor and the second motor.

[0030] Beneficial effects and advantages of the present invention:

[0031] The dual hose reel hydraulic motor drive control system and method realizes switching between independent and synchronous operation modes of the motors by setting an oil circuit switching valve. The first two-position three-way reversing valve, the second two-position three-way reversing valve, and the third two-position three-way reversing valve are switched to control the connection mode of the first motor and the second motor in the hydraulic system to realize independent or synchronous operation of the first motor and the second motor. When the two motors are connected in series, the oil flow rate entering the two hose reel motors is consistent, thereby ensuring the synchronization of hose reeling and laying. It avoids the parameter matching and adjustment of multiple proportional valves, greatly reducing vehicle commissioning time.

[0032] By setting a proportional reversing valve to control the direction of the oil inlet, the forward and reverse rotation of the first motor or the second motor can be achieved, and by using a radial piston motor and a floating switching valve, a first shuttle valve and a second shuttle valve, the floating operation of the first motor and the second motor can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the connection system of the present invention.

[0034] In the figure: 1-engine, 2-hydraulic pump, 3-main overflow valve, 4-floating switching valve, 4.1-first two-position two-way directional reversing valve, 4.2-second two-position two-way directional reversing valve, 4.3-pressure reducing valve, 4.4-third two-position three-way directional reversing valve, 5-oil circuit switching valve, 5.1-first two-position three-way directional reversing valve, 5.2-second two-position three-way directional reversing valve, 5.3-third two-position three-way directional reversing valve, 6-first shuttle valve, 7-first motor, 8-second motor, 9-second shuttle valve, 10-proportional reversing valve. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] Example 1:

[0039] like Figure 1 As shown, this embodiment provides a dual hose reel hydraulic motor drive control system, including an engine 1, a hydraulic pump 2 connected to the engine 1, the hydraulic pump 2 is connected to a proportional reversing valve 10 for changing the direction of the oil inlet circuit, and a motor assembly connected to the proportional reversing valve 10;

[0040] In this embodiment, the motor assembly is preferably composed of a first motor 7 and a second motor 8. In this embodiment, the first motor 7 and the second motor 8 are radial piston motors. An oil circuit switching valve 5 for switching between independent operation and synchronous operation modes of the motors is also connected between the motor assembly and the proportional reversing valve 10.

[0041] A main overflow valve 3 for limiting the maximum pressure of the hydraulic system is also connected between the hydraulic pump 2 and the proportional reversing valve 10.

[0042] The hydraulic pump 2 is further connected to a floating switching valve 4 for realizing motor floating operation, and the output end of the floating switching valve 4 is correspondingly connected to the housing oil drain chambers of the first motor 7 and the second motor 8.

[0043] The proportional directional valve 10 is switched to realize the forward rotation or reverse rotation of the first motor 7 or the second motor 8, so as to realize the laying or winding of the water hose reel; the oil passage of the oil passage switching valve 5 is switched to realize the forward rotation or reverse rotation of the first motor 7 and the second motor 8 in series or independently, so as to realize the synchronous laying or winding in series or the laying or winding of a single water hose reel; and the floating switching valve 4 is arranged to realize the floating operation of the first motor 7 and the second motor 8 simultaneously or independently.

[0044] The oil passage switching valve 5 comprises a first two-position three-way directional valve 5.1, a second two-position three-way directional valve 5.2 and a third two-position three-way directional valve 5.3, which are selectively connected to realize the switching of the independent operation and the synchronous operation mode of the first motor 7 and the second motor 8 in the system.

[0045] The floating switching valve 4 comprises a first two-position two-way directional valve 4.1, a second two-position two-way directional valve 4.2, a pressure reducing valve 4.3 and a third two-position three-way directional valve 4.4.

[0046] The first motor 7 is further connected with the first shuttle valve 6 and the second two-position two-way directional valve 4.2, and the second motor 8 is further connected with the second shuttle valve 9 and the first two-position two-way directional valve 4.1.

[0047] The hydraulic pump 2 is connected with the pressure reducing valve 4.3 and the third two-position three-way directional valve 4.4, and the third two-position three-way directional valve 4.4 is connected with the first motor 7 and the second motor 8.

[0048] In the embodiment, the proportional handle in the prior art is electrically connected with the proportional directional valve 10 to realize the adjustment of the motor speed, so as to realize the stepless speed regulation of the rotation of the water hose reel.

[0049] Embodiment two:

[0050] As shown in Figure 1 The embodiment further provides a double water hose reel hydraulic motor driving control method, which comprises the following steps:

[0051] The oil passage switching valve 5 is controlled to realize the independent operation or the synchronous operation of the first motor 7 and the second motor 8;

[0052] The proportional directional valve 10 is controlled to realize the forward rotation and the reverse rotation of the first motor 7 and the second motor 8;

[0053] The floating switching valve 4 is controlled to realize the floating operation of the first motor 7 and the second motor 8.

[0054] Referring to Figure 1 In the embodiment, when the first motor 7 needs to be independently rotated forward, the first two-position two-way directional valve 4.1 is switched to the first position, the second two-position two-way directional valve 4.2 is switched to the second position, the pressure reducing valve 4.3 is switched to the first position, the third two-position three-way directional valve 4.4 is switched to the first position, the first two-position three-way directional valve 5.1 is switched to the first position, the second two-position three-way directional valve 5.2 is switched to the second position, the proportional directional valve 10 is switched to the first position, and the first motor 7 is rotated forward.

[0055] The proportional reversing valve 10 is controlled to work in the right position when it is energized, the third two-position three-way reversing valve 5.3 is controlled to work in the left position when it is energized, the second two-position three-way reversing valve 5.2 is energized to work in the left position, and the first two-position three-way reversing valve 5.1 is de-energized to work in the left position. At this time, the oil output by the hydraulic pump 2 passes through the proportional reversing valve 10 in the right position and the third two-position three-way reversing valve 5.3 in the left position in sequence, and then reaches the oil port C of the first motor 7. After passing through the oil port D of the first motor 7, it passes through the first two-position three-way reversing valve 5.1 in the left position and returns to the proportional reversing valve 10 in the right position, and further returns to the hydraulic oil tank. At this time, the first motor 7 rotates forward independently to drive the water hose reel to realize the laying of a single water hose;

[0056] When the first motor 7 needs to be reversed independently:

[0057] The proportional reversing valve 10 is controlled to work in the left position when it is energized, the third two-position three-way reversing valve 5.3 is controlled to work in the left position when it is energized, the second two-position three-way reversing valve 5.2 is energized to work in the left position, and the first two-position three-way reversing valve 5.1 is de-energized to work in the left position. At this time, the oil output by the hydraulic pump 2 passes through the proportional reversing valve 10 left position and the third two-position three-way reversing valve 5.3 left position in sequence and reaches the oil port C of the first motor 7. After passing through the oil port D of the first motor 7, it returns to the proportional reversing valve 10 left position through the first two-position three-way reversing valve 5.1 left position, and further returns to the hydraulic oil tank. At this time, the first motor 7 reverses independently to drive the water hose reel to realize the reeling of a single water hose.

[0058] refer to Figure 1 As shown, in this embodiment, when the second motor 8 is required to rotate forward independently:

[0059] The proportional reversing valve 10 is controlled to work in the right position when it is energized, the third two-position three-way reversing valve 5.3 is controlled to work in the right position when it is not energized, the second two-position three-way reversing valve 5.2 is energized to work in the left position, and the first two-position three-way reversing valve 5.1 is energized to work in the right position. At this time, the oil output by the hydraulic pump 2 passes through the proportional reversing valve 10 in the right position and the third two-position three-way reversing valve 5.3 in the right position in sequence, and then reaches the oil port A of the second motor 8. After passing through the oil port B of the second motor 8, it passes through the second two-position three-way reversing valve 5.2 in the left position and the first two-position three-way reversing valve 5.1 in the right position, and then returns to the proportional reversing valve 10 in the right position, and further returns to the hydraulic oil tank. At this time, the second motor 8 rotates forward independently to drive the water hose reel to realize the laying of a single water hose;

[0060] When the second motor 8 needs to be reversed independently:

[0061] The proportional reversing valve 10 is controlled to work in the left position when it is energized, and the third two-position three-way reversing valve 5.3 is controlled to work in the right position without being energized. The second two-position three-way reversing valve 5.2 is energized to work in the left position, and the first two-position three-way reversing valve 5.1 is energized to work in the right position. At this time, the oil output by the hydraulic pump 2 passes through the proportional reversing valve 10 right position and the third two-position three-way reversing valve 5.3 right position in turn to reach the oil port A of the second motor 8. After passing through the oil port B of the second motor 8, it passes through the second two-position three-way reversing valve 5.2 left position and the first two-position three-way reversing valve 5.1 right position and returns to the proportional reversing valve 10 left position, and further returns to the hydraulic oil tank. At this time, the second motor 8 reverses independently to drive the water hose reel to realize the reeling of a single water hose.

[0062] refer to Figure 1 As shown, in this embodiment, when the first motor 7 and the second motor 8 need to rotate forward synchronously;

[0063] The proportional reversing valve 10 is controlled to work in the right position and is energized. The first two-position three-way reversing valve 5.1, the second two-position three-way reversing valve 5.2, and the third two-position three-way reversing valve 5.3 are all de-energized. The oil flows through the third two-position three-way reversing valve 5.3 in the right position to the oil port A of the second motor 8, and then through the oil port B of the second motor 8 to the right position of the second two-position three-way reversing valve 5.2. Then, it passes through the first motor 7 and the first two-position three-way reversing valve 5.1 in sequence, and then returns to the right position of the geographic reversing valve 10, and further returns to the hydraulic oil tank. At this time, the first motor 7 and the second motor 8 rotate forward synchronously to drive the hose reels to achieve synchronous laying of two hoses.

[0064] When the first motor 7 and the second motor 8 need to be reversed synchronously;

[0065] The proportional reversing valve 10 is controlled to be energized and work in the left position, and the first two-position three-way reversing valve 5.1, the second two-position three-way reversing valve 5.2 and the third two-position three-way reversing valve 5.3 are all de-energized. The oil flows through the third two-position three-way reversing valve 5.3 to the right position and reaches the oil port A of the second motor 8. Then, it flows through the oil port B of the second motor 8 to the right position of the second two-position three-way reversing valve 5.2. Then, it passes through the first motor 7 and the first two-position three-way reversing valve 5.1 in sequence and returns to the left position of the geographic reversing valve 10. Then, it returns to the hydraulic oil tank. At this time, the first motor 7 and the second motor 8 synchronously reverse to drive the hose reels to realize the synchronous reeling of the two hoses.

[0066] During synchronous operation, the first motor 7 and the second motor 8 are connected in series in the oil circuit, and the oil flow rate entering the two hose reel motors is consistent, thereby ensuring the synchronization of the reeling and laying of the hose; avoiding the parameter matching and adjustment of the multi-proportional valve, greatly reducing the vehicle debugging time. At the same time, the flow rate of the synchronous operation system of this embodiment is the same as the flow rate of the independent action system, and compared with the parallel control method, it can match a smaller pump source.

[0067] refer to Figure 1 As shown, in this embodiment, when the first motor 7 is required to operate in a floating manner alone:

[0068] The second, second, two-way, two-way directional control valve 4.2 and the third, second, three-way, two-way directional control valve 4.4 are energized, and the oil reaches the left position of the third, second, three-way, two-way directional control valve 4.4 through the pressure reducing valve 4.3. At this time, the pressure oil reaches the oil drain chamber of the radial piston first motor 7 housing. When the piston is pressed into the rotor piston assembly by the pressure oil, the oil in the oil port C and the oil port D reaches the left position of the second, second, two-way, two-way directional control valve 4.2 through the first shuttle valve 6, and further returns to the oil tank, realizing the floating of the first motor 7.

[0069] When the second motor 8 needs to be controlled to operate independently in a floating manner:

[0070] The first two-position two-way directional control valve 4.1 and the third two-position three-way directional control valve 4.4 are energized, and the oil reaches the left position of the third two-position three-way directional control valve 4.4 through the pressure reducing valve 4.3. At this time, the pressure oil reaches the oil drain chamber of the radial piston housing of the second motor 8. When the plunger is pressed into the rotor plunger assembly by the pressure oil, the oil in the oil port A and the oil port B reaches the left position of the first two-position two-way directional control valve 4.1 through the second shuttle valve 9, and further returns to the oil tank, realizing the floating of the second motor 8.

[0071] When the first motor 7 and the second motor 8 need to float at the same time:

[0072] At this time, the first two-position two-way directional control valve 4.1, the second two-position two-way directional control valve 4.2 and the third two-position three-way directional control valve 4.4 are energized. Their floating principle is the same as the principle of the independent floating operation of the first motor 7 and the second motor 8, which will not be repeated here.

[0073] In this embodiment, the floating operation of the motor is completed through the inherent characteristics of the radial piston motor. When there is no pressure oil connection between the motor inlet and outlet oil ports, a pressure of about 2 bar can be provided to the inner cavity of the housing through the oil drain port of the motor housing. The plunger is pressed into the rotor plunger assembly, the roller is no longer located on the cam curve, and the motor shaft can rotate freely, thereby realizing motor floating.

[0074] In the above technical solution, by providing the pressure reducing valve 4.3 in conjunction with the first, second, two-way directional control valve 4.1, the second, second, two-way directional control valve 4.2, and the third, second, three-way directional control valve 4.4, the requirements of independent floating operation of the first motor 7 or the second motor 8, as well as simultaneous floating operation of the first motor 7 and the second motor 8 are achieved.

[0075] Working principle: During the laying process of the water hose laying vehicle, the forward and reverse rotation of the first motor 7 or the second motor 8 is realized by controlling the switching of the proportional reversing valve 10, thereby driving the forward and reverse rotation of the water hose reel to realize the laying and reeling of the water hose, and the independent operation or series synchronous operation of the first motor 7 and the second motor 8 is realized by controlling the switching of the oil circuit switching valve 5, thereby controlling the synchronous laying or reeling of the water hose, and the floating operation of the first motor 7 and the second motor 8 is realized by controlling the switching of the floating switching valve 4. The above-mentioned control switching is used to realize the switching of the double water hose reel multi-operation mode.

[0076] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all protected by the present invention.

Claims

1. A double hose reel hydraulic motor drive control system, characterized by: It comprises an engine (1), a hydraulic pump (2) connected to the engine (1), the hydraulic pump (2) being connected to a proportional reversing valve (10) for changing the direction of an oil inlet, and a motor assembly connected to the proportional reversing valve (10); The motor assembly includes a first motor (7) and a second motor (8), and an oil circuit switching valve (5) for switching between independent motor operation and synchronous operation modes is further connected between the motor assembly and the proportional reversing valve (10); A main overflow valve (3) for limiting the maximum pressure of the hydraulic system is also connected between the hydraulic pump (2) and the proportional reversing valve (10); The hydraulic pump (2) is also connected to a floating switching valve (4) for realizing motor floating operation, and the output end of the floating switching valve (4) is correspondingly connected to the housing oil drain chambers of the first motor (7) and the second motor (8); The oil circuit switching valve (5) comprises a first two-position three-way reversing valve (5.1), a second two-position three-way reversing valve (5.2) and a third two-position three-way reversing valve (5.3), and the first two-position three-way reversing valve (5.1), the second two-position three-way reversing valve (5.2) and the third two-position three-way reversing valve (5.3) are selectively connected to realize the switching between the independent operation mode and the synchronous operation mode of the first motor (7) and the second motor (8) in the system; The floating switching valve (4) includes a first two-position two-way reversing valve (4.1), a second two-position two-way reversing valve (4.2), a pressure reducing valve (4.3) and a third two-position three-way reversing valve (4.4); the first motor (7) is further connected to a first shuttle valve (6) connected to the second two-position two-way reversing valve (4.2), and the second motor (8) is further connected to a second shuttle valve (9) connected to the first two-position two-way reversing valve (4.1); The hydraulic pump (2) is connected to a pressure reducing valve (4.3) and a third two-position three-way reversing valve (4.4), and the third two-position three-way reversing valve (4.4) is connected to a first motor (7) and a second motor (8); The first motor (7) and the second motor (8) are both radial piston motors.

2. A control method applicable to the dual hose reel hydraulic motor drive control system according to claim 1, characterized in that: include: Controlling the oil circuit switching valve (5) to achieve independent action or series synchronous action of the first motor (7) and the second motor (8); The proportional reversing valve (10) is controlled to realize the forward and reverse rotation of the first motor (7) and the second motor (8), thereby realizing stepless speed regulation of the first motor (7) and the second motor (8).

3. The control method according to claim 2, wherein: The control proportional reversing valve (10) is energized to work in the right position, the control third two-position three-way reversing valve (5.3) is energized to work in the left position, the second two-position three-way reversing valve (5.2) is energized to work in the left position, and the first two-position three-way reversing valve (5.1) is not energized to work in the left position. At this time, the first motor (7) rotates forward independently; the control proportional reversing valve (10) is energized to work in the left position, the control first two-position three-way reversing valve (5.1), the second two-position three-way reversing valve (5.2) and the third two-position three-way reversing valve (5.3) are energized in the same manner as when the first motor (7) rotates forward. At this time, the first motor (7) rotates reverse independently.

4. The control method according to claim 2, wherein: The control proportional reversing valve (10) is energized to work in the right position, the control third two-position three-way reversing valve (5.3) is not energized to work in the right position, the second two-position three-way reversing valve (5.2) is energized to work in the left position, and the first two-position three-way reversing valve (5.1) is energized to work in the right position. At this time, the second motor (8) rotates forward independently; The proportional reversing valve (10) is controlled to be energized in the left position, and the first two-position three-way reversing valve (5.1), the second two-position three-way reversing valve (5.2) and the third two-position three-way reversing valve (5.3) are controlled in the same manner as when the second motor (8) rotates forward. At this time, the second motor (8) rotates reversely independently.

5. The control method according to claim 2, wherein: The proportional reversing valve (10) is controlled to be energized in the right position, and the first two-position three-way reversing valve (5.1), the second two-position three-way reversing valve (5.2) and the third two-position three-way reversing valve (5.3) are all de-energized. At this time, the first motor (7) and the second motor (8) are connected in series and rotate synchronously in the forward direction. The proportional reversing valve (10) is controlled to be energized and work in the left position, and the first two-position three-way reversing valve (5.1), the second two-position three-way reversing valve (5.2) and the third two-position three-way reversing valve (5.3) are controlled to be energized in the same manner as when the first motor (7) and the second motor (8) rotate forward synchronously. At this time, the first motor (7) and the second motor (8) are connected in series and rotated in the reverse direction synchronously.

6. The control method according to claim 2, wherein: The floating operation of the first motor (7) and the second motor (8) is realized by controlling the floating switching valve (4), including: controlling the engine (1) to run at idle speed, the hydraulic pump (2) to run at a small flow rate, controlling the third two-position three-way reversing valve (4.4) to be energized and running, the oil reaching the left position of the third two-position three-way reversing valve (4.4) through the pressure reducing valve (4.3), and then reaching the housing oil drain chamber of the first motor (7) and the second motor (8), and controlling the second two-position two-way reversing valve (4.2) or the first two-position two-way reversing valve (4.1) to be energized and return oil through the first shuttle valve (6) or the second shuttle valve (9), so as to realize the floating operation of the first motor (7) and the second motor (8).

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