Hydraulic control device of vacuum sweeper

Abstract

A hydraulic control device of a vacuum sweeper is characterized in that a fan servo pump is communicated with a fan motor, a front gear pump is communicated with a box body left and right lifting oil cylinder and a box body self-falling hydraulic control valve through a large-flow hydraulic control valve and a box body pressure maintaining one-way valve, and is communicated with a rolling brush left motor and a rolling brush right motor; the rear gear pump is communicated with a left and right side brush lifting hydraulic control valve, a rear door opening and closing hydraulic control valve, a right side brush motor hydraulic control valve, a main hydraulic control valve and a suction cup lifting hydraulic control valve; the left side brush lifting hydraulic control valve is communicated with a left side brush lifting oil cylinder; the rear door opening and closing hydraulic control valve is communicated with the rear door left and right opening and closing oil cylinders; a right brush motor hydraulic control valve is communicated with a right brush motor and a left brush one-way valve, the right brush motor is communicated with the left brush one-way valve and a left brush hydraulic control valve through the right brush one-way valve, and the left brush hydraulic control valve is communicated with a left brush motor. The right side brush lifting hydraulic control valve is communicated with a right side brush lifting oil cylinder; the sucker lifting hydraulic control valve is communicated with the sucker left lifting oil cylinder and the sucker right lifting oil cylinder.

Description

Technical Field

[0001] This utility model belongs to the technical field of equipment and devices for constructing new road surfaces and repairing or building existing road surfaces, and specifically relates to the components of a vacuum truck. Background Technology

[0002] Currently, a nationwide expressway network has been established. Even after expressways are completed and put into use, and during road maintenance, there is still pollution from gravel and dust on the road surface. When vehicles travel at high speeds, the dust is stirred up and floats in the air above the road, causing air pollution and affecting environmental sanitation. Currently, the recycling and cleaning of gravel on expressways mainly relies on manual labor, which is slow, wastes manpower, increases road maintenance costs, and requires closing traffic during cleaning, affecting the openness of the expressway.

[0003] Existing sweepers can only be used to clean up debris on city streets and transport the debris to waste treatment plants. They cannot recycle gravel on highways or waste materials on the road surface, nor can they separate the recycled debris or filter the dust.

[0004] Existing vacuum trucks have drawbacks such as poor dust filtration, difficulty in disassembling and replacing filter cartridges for maintenance, and high labor intensity for operators.

[0005] To address the aforementioned technical problems, the inventor of this utility model designed a vacuum truck. This truck utilizes an engine to drive a high-powered fan, generating negative pressure for direct suction. Employing aerodynamic principles, it creates a pressure difference between the air inside and outside the dust collection compartment, collecting and storing dust and debris from the road surface. Equipped with a dust filtration device and an automatic pulse dust removal system, it effectively reduces dust pollution. Simultaneously, it filters the inhaled particulate matter and releases it into the atmosphere, reducing the concentration of inhalable particulate matter in the air, improving air quality, reducing environmental pollution, and improving public health.

[0006] One of the urgent technical problems that the aforementioned vacuum cleaners need to solve is to provide a hydraulic control device. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to overcome the shortcomings of the above-mentioned device, such as low control sensitivity, unstable speed regulation, and susceptibility to load, and to provide a hydraulic control device for a vacuum cleaner that is reasonably designed, simple in structure, stable and accurate in speed regulation, unaffected by load, and has high control sensitivity.

[0008] The technical solution adopted to solve the above technical problems is as follows: the inlet of the fan servo pump is connected to the hydraulic oil tank through a pipeline, the outlet of the fan servo pump is connected to the inlet of the fan motor through a pipeline, and the outlet is connected to the return oil port of the fan servo pump through a pipeline.

[0009] The inlet of the front gear pump is connected to the hydraulic oil tank via a pipeline, and the outlet of the front gear pump is connected to the inlet of the high-flow hydraulic control valve via a pipeline. One outlet of the high-flow hydraulic control valve is connected to the inlet of the left lifting cylinder, the right lifting cylinder, and the self-lowering hydraulic control valve of the housing via a housing pressure-holding check valve installed on the pipeline. The outlet of the self-lowering hydraulic control valve is connected to the hydraulic oil tank via a pipeline. The other outlet of the high-flow hydraulic control valve is connected to the inlet of the left and right roller brush motors. The outlets of the left and right roller brush motors are connected to the hydraulic oil tank via pipelines.

[0010] The inlet of the rear gear pump is connected to the hydraulic oil tank via a pipeline. The outlet of the rear gear pump is connected to the inlets of the left brush lifting hydraulic control valve, the rear door opening and closing hydraulic control valve, the right brush motor hydraulic control valve, the main hydraulic control valve, the right brush lifting hydraulic control valve, and the suction cup lifting hydraulic control valve, all installed on the pipeline. The outlet of the left brush lifting hydraulic control valve is connected to the inlet of the left brush lifting cylinder via a pipeline, and the outlet of the left brush lifting cylinder is connected to the hydraulic oil tank via the left brush lifting hydraulic control valve. The outlet of the rear door opening and closing hydraulic control valve is connected to the inlets of the left and right rear door opening and closing cylinders via a pipeline, and the outlets of the left and right rear door opening and closing cylinders are connected to the hydraulic oil tank via the rear door opening and closing hydraulic control valve. The outlet of the right brush motor hydraulic control valve is connected via pipes to the inlet of the right brush motor and the left brush check valve, respectively. The outlet of the right brush motor is connected via a right brush check valve (installed on the pipes) to the outlet of the left brush check valve and the inlet of the left brush hydraulic control valve. The outlet of the left brush hydraulic control valve is connected via a pipe to the inlet of the left brush motor. The outlet of the left brush motor is connected via the left brush hydraulic control valve to the hydraulic oil tank. The outlet of the main hydraulic control valve is connected via a pipe to the hydraulic oil tank. The outlet of the right brush lifting hydraulic control valve is connected via a pipe to the inlet of the right brush lifting cylinder. The outlet of the right brush lifting cylinder is connected via a right brush self-falling hydraulic control valve (installed on the pipes) and the right brush lifting hydraulic control valve to the hydraulic oil tank. The outlet of the suction cup lifting hydraulic control valve is connected via a pipe to the inlets of the left and right suction cup lifting cylinders. The outlets of the left and right suction cup lifting cylinders are connected via a suction cup self-falling hydraulic control valve (installed on the pipes) and the suction cup lifting hydraulic control valve to the hydraulic oil tank.

[0011] The model of the fan motor of this utility model is S90, and the model of the fan servo pump is HP4VG.

[0012] This invention utilizes a fan servo pump to control the fan motor, a high-flow hydraulic control valve to control the lifting and lowering of the housing and the operation of the left and right roller brush motors, a left brush lifting hydraulic control valve to control the left brush lifting cylinder, a rear door opening and closing hydraulic control valve to control the rear door left and right opening and closing cylinders, a right brush motor hydraulic control valve to control the right brush motor, a left brush motor hydraulic control valve to control the left brush motor, a right brush lifting hydraulic control valve and a right brush self-falling hydraulic control valve to control the right brush lifting cylinder, and a suction cup lifting hydraulic control valve and a suction cup self-falling hydraulic control valve to control the suction cup left and right lifting cylinders. This allows the entire device to operate stably and accurately, unaffected by load, and features a reasonable design, simple structure, and high control sensitivity, making it suitable for use on vacuum cleaner trucks. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to these embodiments.

[0015] exist Figure 1 In this embodiment, the hydraulic control device of the vacuum cleaner truck consists of a fan motor 1, a left lifting cylinder for the casing 2, a right lifting cylinder for the casing 3, a self-lowering hydraulic control valve for the casing 4, a left brush lifting cylinder 5, a left brush lifting hydraulic control valve 6, a left rear door opening / closing cylinder 7, a right rear door opening / closing cylinder 8, a right brush motor 9, a right brush check valve 10, a left brush motor 11, a left brush hydraulic control valve 12, a main hydraulic control valve 13, a right brush lifting cylinder 14, a right brush self-lowering hydraulic control valve 15, and a suction... The following components are connected together: left lifting cylinder 16, right lifting cylinder 17, suction cup self-falling hydraulic control valve 18, suction cup lifting hydraulic control valve 19, right brush lifting hydraulic control valve 20, left brush check valve 21, right brush motor hydraulic control valve 22, rear door opening and closing hydraulic control valve 23, rear gear pump 24, left roller brush motor 25, right roller brush motor 26, high flow hydraulic control valve 27, front gear pump 28, box pressure holding check valve 29, fan servo pump 30, and hydraulic oil tank 31.

[0016] The inlet of the fan servo pump 30 is connected to the hydraulic oil tank 31 through a pipeline, the outlet of the fan servo pump 30 is connected to the inlet of the fan motor 1 through a pipeline, and the outlet is connected to the return oil port of the fan servo pump 30 through a pipeline. The fan servo pump 30 provides a hydraulic power source for the fan motor 1.

[0017] The inlet of the front gear pump 28 is connected to the hydraulic oil tank 31 via a pipeline, and the outlet of the front gear pump 28 is connected to the inlet of the high-flow hydraulic control valve 27 via a pipeline. One outlet of the high-flow hydraulic control valve 27 is connected to the inlet of the left lifting cylinder 2, the right lifting cylinder 3, and the self-lowering hydraulic control valve 4 of the housing via a housing pressure-holding check valve 29 installed on the pipeline. The outlet of the self-lowering hydraulic control valve 4 is connected to the hydraulic oil tank 31 via a pipeline. The other outlet of valve 27 is connected to the inlet of the left roller brush motor 25 and the right roller brush motor 26. The outlets of the left roller brush motor 25 and the right roller brush motor 26 are connected to the hydraulic oil tank 31 through pipes. The high-flow hydraulic control valve 27 is used to control the lifting state of the left lifting cylinder 2 and the right lifting cylinder 3 of the box body, and to control the rotation of the left roller brush motor 25 and the right roller brush motor 26. The box body self-falling hydraulic control valve 4 is used to control the falling state of the left lifting cylinder 2 and the right lifting cylinder 3 of the box body.

[0018] The inlet of the rear gear pump 24 is connected to the hydraulic oil tank 31 via a pipe. The outlet of the rear gear pump 24 is connected to the inlet of the left brush lifting hydraulic control valve 6, the rear door opening and closing hydraulic control valve 23, the right brush motor hydraulic control valve 22, the main hydraulic control valve 13, the right brush lifting hydraulic control valve 20, and the suction cup lifting hydraulic control valve 19, all installed on the pipe. The outlet of the left brush lifting hydraulic control valve 6 is connected to the inlet of the left brush lifting cylinder 5 via a pipe. The outlet of the left brush lifting cylinder 5 is connected to the hydraulic oil tank 31 via the left brush lifting hydraulic control valve 6. The left brush lifting hydraulic control valve 6 is used to control the working state of the left brush lifting cylinder 5. The outlet of the rear door opening and closing hydraulic control valve 23 is connected to the inlet of the left brush lifting cylinder 5. The pipeline connects to the inlets of the left rear door opening / closing cylinder 7 and the right rear door opening / closing cylinder 8. The outlets of the left rear door opening / closing cylinder 7 and the right rear door opening / closing cylinder 8 are connected to the hydraulic oil tank 31 via the rear door opening / closing hydraulic control valve 23. The rear door opening / closing hydraulic control valve 23 is used to control the working status of the left rear door opening / closing cylinder 7 and the right rear door opening / closing cylinder 8. The outlet of the right brush motor hydraulic control valve 22 is connected to the inlets of the right brush motor 9 and the left brush check valve 21 via pipelines. The outlet of the right brush motor 9 is connected to the outlet of the left brush check valve 21 and the inlet of the left brush hydraulic control valve 12 via the right brush check valve 10 installed on the pipeline. The outlet of the left brush hydraulic control valve 12 is connected to the left brush motor... The inlet of the left brush motor 11 is connected to the outlet of the left brush motor 11, which is connected to the hydraulic oil tank 31 via the left brush hydraulic control valve 12. The left brush hydraulic control valve 12 is used to control the rotation of the left brush motor 11, and the right brush motor hydraulic control valve 22 is used to control the rotation of the right brush motor 9. The outlet of the main hydraulic control valve 13 is connected to the hydraulic oil tank 31 via a pipeline. The outlet of the right brush lifting hydraulic control valve 20 is connected to the inlet of the right brush lifting cylinder 14 via a pipeline. The outlet of the right brush lifting cylinder 14 is connected to the hydraulic oil tank 31 via the right brush self-falling hydraulic control valve 15 and the right brush lifting hydraulic control valve 20 installed on the pipeline. The right brush lifting hydraulic control valve 20 is used to control the rotation of the right brush motor 9. The lifting cylinder 14 is in the lifting state, and the right brush self-falling hydraulic control valve 15 is used to control the falling state of the right brush lifting cylinder 14; the outlet of the suction cup lifting hydraulic control valve 19 is connected to the inlet of the suction cup left lifting cylinder 16 and the suction cup right lifting cylinder 17 through a pipe, and the outlet of the suction cup left lifting cylinder 16 and the suction cup right lifting cylinder 17 is connected to the hydraulic oil tank 31 through the suction cup self-falling hydraulic control valve 18 and the suction cup lifting hydraulic control valve 19 installed on the pipe. The suction cup lifting hydraulic control valve 19 is used to control the lifting state of the suction cup left lifting cylinder 16 and the suction cup right lifting cylinder 17, and the suction cup self-falling hydraulic control valve 18 is used to control the falling state of the suction cup left lifting cylinder 16 and the suction cup right lifting cylinder 17.

[0019] The fan motor 1 of this invention is an S90 series axial piston motor manufactured by Danfoss Hydraulics AG of Denmark. The fan servo pump 30 is an HP4VG series closed-loop axial piston pump manufactured by Jiangsu Hengli Hydraulics AG. This ultra-high pressure closed-loop pump can meet the application requirements of harsh working conditions such as high pressure, high speed, and frequent impact. This invention features stable and precise speed regulation unaffected by load. It has advantages such as reasonable design, simple structure, and high control sensitivity, and can be used on vacuum trucks.

Claims

1. A hydraulic control device for a vacuum cleaner truck, characterized in that: The inlet of the fan servo pump (30) is connected to the hydraulic oil tank (31) through a pipe, the outlet of the fan servo pump (30) is connected to the inlet of the fan motor (1) through a pipe, and the outlet is connected to the return oil port of the fan servo pump (30) through a pipe. The inlet of the front gear pump (28) is connected to the hydraulic oil tank (31) through a pipe. The outlet of the front gear pump (28) is connected to the inlet of the high-flow hydraulic control valve (27) through a pipe. One outlet of the high-flow hydraulic control valve (27) is connected to the inlet of the left lifting cylinder (2), the right lifting cylinder (3), and the self-falling hydraulic control valve (4) of the housing through the housing pressure-holding check valve (29) installed on the pipe. The outlet of the self-falling hydraulic control valve (4) of the housing is connected to the hydraulic oil tank (31) through a pipe. The other outlet of the high-flow hydraulic control valve (27) is connected to the inlet of the left motor (25) and the right motor (26) of the roller brush. The outlets of the left motor (25) and the right motor (26) of the roller brush are connected to the hydraulic oil tank (31) through pipes. The inlet of the rear gear pump (24) is connected to the hydraulic oil tank (31) via a pipe. The outlet of the rear gear pump (24) is connected to the inlet of the left brush lifting hydraulic control valve (6), the rear door opening and closing hydraulic control valve (23), the right brush motor hydraulic control valve (22), the main hydraulic control valve (13), the right brush lifting hydraulic control valve (20), and the suction cup lifting hydraulic control valve (19) installed on the pipe. The outlet of the left brush lifting hydraulic control valve (6) is connected to the inlet of the left brush lifting cylinder (5) via a pipe. The outlet of the left brush lifting cylinder (5) is connected to the inlet of the left brush lifting cylinder (5) via the left brush lifting cylinder (31). The side brush lifting hydraulic control valve (6) is connected to the hydraulic oil tank (31); the outlet of the rear door opening and closing hydraulic control valve (23) is connected to the inlet of the rear door left opening and closing cylinder (7) and the rear door right opening and closing cylinder (8) through a pipe, and the outlet of the rear door left opening and closing cylinder (7) and the rear door right opening and closing cylinder (8) is connected to the hydraulic oil tank (31) through the rear door opening and closing hydraulic control valve (23); the outlet of the right brush motor hydraulic control valve (22) is connected to the inlet of the right brush motor (9) and the left brush check valve (21) through a pipe, and the outlet of the right brush motor (9) is connected to the inlet of the left brush check valve (21) through a pipe installed on The outlet of the right brush check valve (10) on the pipeline is connected to the outlet of the left brush check valve (21) and the inlet of the left brush hydraulic control valve (12). The outlet of the left brush hydraulic control valve (12) is connected to the inlet of the left brush motor (11) through a pipeline. The outlet of the left brush motor (11) is connected to the hydraulic oil tank (31) through the left brush hydraulic control valve (12). The outlet of the main hydraulic control valve (13) is connected to the hydraulic oil tank (31) through a pipeline. The outlet of the right brush lifting hydraulic control valve (20) is connected to the inlet of the right brush lifting cylinder (14) through a pipeline. The outlet of the right brush lifting cylinder (14) is connected to the hydraulic oil tank (31) through the right brush self-falling hydraulic control valve (15) and the right brush lifting hydraulic control valve (20) installed on the pipeline; the outlet of the suction cup lifting hydraulic control valve (19) is connected to the inlet of the suction cup left lifting cylinder (16) and the suction cup right lifting cylinder (17) through the pipeline, and the outlet of the suction cup left lifting cylinder (16) and the suction cup right lifting cylinder (17) is connected to the hydraulic oil tank (31) through the suction cup self-falling hydraulic control valve (18) and the suction cup lifting hydraulic control valve (19) installed on the pipeline.

2. The hydraulic control device for the vacuum cleaner truck according to claim 1, characterized in that: The fan motor (1) is model S90, and the fan servo pump (30) is model HP4VG.

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