Onboard air compressor for pile grouting machine

Abstract

The utility model relates to an onboard air compressor for a pile grouting machine, which comprises a base, a screw compressor, an oil-gas separation tank, an oil filter assembly and a radiator are mounted on the base, and a radiating fan is mounted on the radiator. One end of the screw compressor is connected with a hydraulic motor through a central bracket, and a power output shaft of the hydraulic motor is connected with a power input shaft of the screw compressor through a coupler; a compressor gas inlet of the screw compressor is provided with a gas inlet valve, and a compressor gas outlet of the screw compressor is communicated with a separation tank gas inlet pipe of the oil-gas separation tank through a gas transmission hard pipe; a pressure retaining valve is mounted at the top end of the oil-gas separation tank, and a high-pressure gas output pipe is arranged on one side of the pressure retaining valve. The device has the advantages that hydraulic oil is supplied to the hydraulic motor through the hydraulic main pump of the pile filling machine, the hydraulic motor is driven to work, and therefore the screw compressor is driven to work to compress air and convey the compressed air into the oil-gas separation tank, and the compressed air is supplied to a pile foundation part needing hole cleaning for hole cleaning operation after oil-gas separation.

Description

Technical Field

[0001] The utility model relates to the field of filling machines, in particular to an onboard air compressor for a pile driving machine. Background Art

[0002] Since the first generation of pile boring machines did not have an integrated onboard air compressor, the air lift reverse circulation hole cleaning process required during the pile boring machine construction required an independent air compressor on site to cooperate with the pile boring machine, which resulted in the occupation of other machinery on site, affecting the normal construction progress of the project and increasing labor and construction costs. Utility Model Content

[0003] The utility model aims to overcome the above problems existing in the prior art and provide an onboard air compressor for a pile driving machine.

[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0005] An onboard air compressor for a pile driver comprises a base, which is mounted on the chassis of a filling machine, on which a screw compressor, an oil-gas separation tank, an oil filter assembly, and a radiator are mounted, and a cooling fan is mounted on the radiator; one end of the screw compressor is connected to a hydraulic motor through a central bracket, the hydraulic motor is supplied with hydraulic oil by a hydraulic main pump of the filling machine, and a power output shaft of the hydraulic motor is connected to a power input shaft of the screw compressor through a coupling; an air inlet of the screw compressor is mounted with an air inlet valve, and an air outlet of the screw compressor is connected to a power input shaft of the screw compressor through a coupling; The gas transmission hard pipe is connected with the separation tank air inlet pipe of the oil-gas separation tank; the separation tank oil outlet of the oil-gas separation tank is connected with the first oil filter oil inlet of the oil filter assembly through the first oil pipe, the first oil filter oil outlet of the oil filter assembly is connected with the heat dissipation oil inlet of the radiator through the second oil pipe, the heat dissipation oil outlet of the radiator is connected with the second oil filter oil inlet of the oil filter assembly through the third oil pipe, and the second oil filter oil outlet of the oil filter assembly is connected with the compressor oil inlet of the screw compressor through the fourth oil pipe; a pressure maintaining valve is installed on the top of the oil-gas separation tank, and a high-pressure gas output pipe is arranged on one side of the pressure maintaining valve.

[0006] Wherein, an air intake pipe is installed on the air intake valve, the inlet end of the air intake pipe is connected to an air filter, and the top of the air filter is provided with an air filter inlet.

[0007] Wherein, an intake valve pressure switch is also installed on the intake valve, and the intake valve pressure switch is connected to the oil chamber of the oil-gas separation tank through the fifth oil pipe.

[0008] Wherein, a safety valve is arranged on the upper part of the tank wall of the oil-gas separation tank.

[0009] Wherein, a refueling port is arranged in the middle of the tank wall of the oil-gas separation tank, and a plug is screwed into the refueling port.

[0010] Wherein, an oil level gauge is arranged at the lower part of the tank wall of the oil-gas separation tank.

[0011] Wherein, an oil drain valve is arranged at the bottom center of the oil-gas separation tank.

[0012] Wherein, a gas delivery hose is installed between the gas delivery hard pipe and the separation tank air inlet pipe.

[0013] Wherein, the hydraulic motor is provided with a hydraulic oil inlet and a hydraulic oil outlet.

[0014] Among them, the base includes a rectangular bottom frame, a main engine bracket, an oil filter bracket, and a separation tank bracket. The main engine bracket, oil filter bracket, separation tank bracket, and radiator are respectively installed on the rectangular bottom frame with bolts. A rubber shock-absorbing block is sandwiched between the main engine bracket and the rectangular bottom frame. The screw compressor is installed on the main engine bracket, the oil filter assembly is installed on the oil filter bracket, and the oil-gas separation tank is fixedly connected to the top of the separation tank bracket.

[0015] The beneficial effects of the utility model are as follows: the hydraulic main pump of the pile driving machine is used to supply hydraulic oil to the hydraulic motor to drive the hydraulic motor to work, thereby driving the screw compressor to work to compress the air and then transport it to the oil-gas separation tank, and after the oil-gas separation, it is supplied to the pile foundation part that needs to be cleaned for hole cleaning operation; the floor space occupied and the power equipment cost are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a schematic structural diagram of the airborne air compressor in the utility model from the first perspective;

[0018] Figure 2 It is a structural schematic diagram of the airborne air compressor in the utility model from a second viewing angle;

[0019] Figure 3 It is a structural schematic diagram of the airborne air compressor in the utility model from a third perspective;

[0020] Explanation of the numbers in the figure: base 1, rectangular bottom frame 101, main engine bracket 102, oil filter bracket 103, separation tank bracket 104, rubber shock absorber 105, screw compressor 2, oil and gas separation tank 3, separation tank inlet pipe 301, pressure maintaining valve 302, high-pressure gas output pipe 303, safety valve 304, refueling port 305, plug 306, oil level gauge 307, oil drain valve 308, oil filter assembly 4, cooling fan 5, radiator 6, center bracket 7, hydraulic motor 8, hydraulic oil inlet 801, hydraulic oil outlet 802, coupling 9, intake valve 10, intake pipe 11, air filter 12, air filter inlet 1201, intake valve pressure switch 13, fifth oil pipe 14, gas delivery hard pipe 15, gas delivery hose 16, first oil pipe 17, second oil pipe 18, third oil pipe 19, fourth oil pipe 20. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0022] like Figures 1 to 3 As shown, an onboard air compressor for a pile driver comprises a base 1, which is mounted on the chassis of the filling machine, and a screw compressor 2, an oil-gas separation tank 3, an oil filter assembly 4, and a radiator 6 are mounted on the base 1, and a cooling fan 5 is mounted on the radiator 6. Specifically, the base 1 comprises a rectangular bottom frame 101, a main frame bracket 102, an oil filter bracket 103, and a separation tank bracket 104, and the main frame bracket 102, the oil filter bracket 103, the separation tank bracket 104, and the radiator 6 are respectively mounted on the rectangular bottom frame 101 with bolts, and a rubber damping block 105 is sandwiched between the main frame bracket 102 and the rectangular bottom frame 101, the screw compressor 2 is mounted on the main frame bracket 102, the oil filter assembly 4 is mounted on the oil filter bracket 103, and the oil-gas separation tank 3 is fixedly connected to the top of the separation tank bracket 104.

[0023] One end of the screw compressor 2 is connected to a hydraulic motor 8 through a central bracket 7. The hydraulic motor 8 is supplied with hydraulic oil by the hydraulic main pump of the filling machine. A hydraulic oil inlet 801 and a hydraulic oil outlet 802 are provided on the hydraulic motor 8. The hydraulic oil inlet 801 is connected to the oil outlet pipe of the hydraulic main pump of the filling machine through a hydraulic oil input pipe. A solenoid valve for controlling the on-off of the hydraulic oil input pipe is installed on the hydraulic oil input pipe. The hydraulic oil outlet 802 is connected to the oil inlet pipe of the hydraulic oil radiator of the filling machine through a hydraulic oil output pipe; the power output shaft of the hydraulic motor 8 is connected to the power input shaft of the screw compressor 2 through a coupling 9.

[0024] An air intake valve 10 is installed at the compressor air intake of the screw compressor 2, an air intake pipe 11 is installed on the air intake valve 10, an inlet end of the air intake pipe 11 is connected to an air filter 12, and an air filter air intake port 1201 is arranged on the top of the air filter 12.

[0025] An intake valve pressure switch 13 is also installed on the intake valve 10, and the intake valve pressure switch is connected to the oil chamber of the oil-gas separation tank 3 through the fifth oil pipe 14. When the air pressure value in the oil-gas separation tank exceeds the preset shutdown air pressure value, the intake valve 10 is controlled to close to reduce the air intake of the screw compressor, but the screw compressor will not be shut down to avoid exceeding the safety pressure of the oil-gas separation tank 3, thereby protecting the oil-gas separation tank 3 and the pipelines and equipment connected thereto.

[0026] The compressor air outlet of the screw compressor 2 is connected to the separation tank air inlet pipe 301 of the oil-gas separation tank 3 through the air delivery hard pipe 15. In order to prevent air leakage between the air delivery hard pipe 15 and the separation tank air inlet pipe 301 of the oil-gas separation tank 3 due to thermal expansion and contraction or vibration, a gas delivery hose 16 is installed between the air delivery hard pipe 15 and the separation tank air inlet pipe 301.

[0027] The separation tank oil outlet of the oil-gas separation tank 3 is connected to the first oil filter oil inlet of the oil filter assembly 4 through the first oil pipe 17, the first oil filter oil outlet of the oil filter assembly 4 is connected to the heat dissipation oil inlet of the radiator 6 through the second oil pipe 18, the heat dissipation oil outlet of the radiator 6 is connected to the second oil filter oil inlet of the oil filter assembly 4 through the third oil pipe 19, and the second oil filter oil outlet of the oil filter assembly 4 is connected to the compressor oil inlet of the screw compressor 2 through the fourth oil pipe 20.

[0028] A pressure-maintaining valve 302 is installed at the top of the oil-gas separation tank 3, and a high-pressure gas output pipe 303 is provided on one side of the pressure-maintaining valve 302. When the screw compressor 2 stops working, when the air pressure value in the oil-gas separation tank 3 is lower than the set low pressure value, the pressure-maintaining valve 302 is closed to stop the output of high-pressure gas, so that a certain air pressure is retained inside the oil-gas separation tank 3, so that when the screw compressor is started again, the lubricating oil in the lower part of the oil-gas separation tank 3 can be transported to the inside of the screw compressor 2 in time, so as to lubricate the screw and bearing inside the screw compressor 2 in time, so as to extend the service life of the screw compressor 2.

[0029] A safety valve 304 is provided on the upper part of the tank wall of the oil-gas separation tank 3. When the air pressure in the oil-gas separation tank 3 exceeds the set high pressure value, the safety valve 304 is opened to release air, thereby protecting the oil-gas separation tank 3 and the pipelines and equipment connected thereto.

[0030] A refueling port 305 is provided in the middle of the tank wall of the oil-gas separation tank 3 , and a plug 306 is screwed into the refueling port 305 . The plug 306 is opened to add lubricating oil into the oil-gas separation tank 3 through the refueling port 305 .

[0031] An oil level gauge 307 is provided at the lower part of the tank wall of the oil-gas separation tank 3 to observe whether the oil level of the lubricating oil in the oil-gas separation tank 3 meets the requirements.

[0032] An oil drain valve 308 is provided at the bottom center of the oil-gas separation tank 3. The oil drain valve 308 can discharge expired and unqualified lubricating oil and other impurities when maintaining the machine, and can also be opened regularly to discharge moisture at the bottom of the oil-gas separation tank 3.

[0033] 1. Working principle of hydraulic motor and screw compressor: When the screw compressor needs to work, the engine of the pile driving machine drives the hydraulic main pump of the pile driving machine to work, and opens the solenoid valve on the hydraulic oil input pipe to make the hydraulic oil in the hydraulic main pump of the pile driving machine flow into the hydraulic motor 8, driving the hydraulic motor to work, and the hydraulic motor drives the screw compressor to work through the coupling to compress the air; when the screw compressor is not needed to work, close the solenoid valve on the hydraulic oil input pipe. At this time, the hydraulic oil cannot flow from the hydraulic main pump of the pile driving machine into the hydraulic motor, and the hydraulic motor and screw compressor stop working.

[0034] 2. The process of air compression to discharge: When the screw compressor is working, negative pressure is formed inside the screw compressor, the air inlet valve opens, and the external air is filtered by the air filter and then enters the screw compressor along the air inlet pipe and the air inlet valve. After the screw compressor compresses the air, it enters the oil-gas separation tank along the gas pipe, gas hose, and separation tank air inlet pipe.

[0035] Since the compressed air entering the oil-gas separation tank is mixed with the lubricating oil in the screw compressor, the compressed air automatically separates the compressed air and the lubricating oil through the internal filter and centrifugal mechanism in the oil-gas separation tank. The compressed air after oil-gas separation is stored in the upper part of the oil-gas separation tank, and then supplied to the pile foundation part that needs to be cleaned through the pressure maintaining valve and the high-pressure gas output pipe for hole cleaning operation; the lubricating oil after oil-gas separation flows to the lower part of the oil-gas separation tank.

[0036] When the screw compressor is not working, if there is compressed gas with sufficient pressure stored in the oil-gas separation tank, the pressure maintaining valve can still be opened to supply gas.

[0037] 3. Principle of lubricating oil circulation: When the hydraulic oil pump of the pile driving machine is just started, the lubricating oil stored in the lower part of the oil-gas separation tank enters the oil filter assembly through the first oil pipe under the residual pressure in the oil-gas separation tank. After being processed by the filter element in the oil filter assembly, the lubricating oil enters the screw compressor along the fourth oil pipe to lubricate the screw and bearings in the screw compressor.

[0038] When the lubricating oil temperature reaches the set temperature that needs to be cooled, the temperature control valve inside the oil filter assembly opens. At this time, the lubricating oil will flow into the radiator through the second oil pipe. After being cooled, the lubricating oil will flow back to the oil filter assembly through the third oil pipe. After being filtered by the filter element in the oil filter assembly, it will enter the screw compressor along the fourth oil pipe to lubricate the screw and bearings in the screw compressor.

[0039] Part of the lubricating oil in the screw compressor will be mixed with the compressed air and enter the oil-gas separation tank.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An onboard air compressor for a pile driver, characterized in that: It includes a base, which is installed on the chassis of the filling machine, on which a screw compressor, an oil-gas separation tank, an oil filter assembly, and a radiator are installed, and on which a cooling fan is installed; One end of the screw compressor is connected to a hydraulic motor through a central bracket, the hydraulic motor is supplied with hydraulic oil by a hydraulic main pump of the filling machine, and the power output shaft of the hydraulic motor is connected to the power input shaft of the screw compressor through a coupling; The compressor air inlet of the screw compressor is equipped with an air inlet valve, and the compressor air outlet of the screw compressor is connected to the separation tank air inlet pipe of the oil-gas separation tank through a gas transmission hard pipe; The separation tank oil outlet of the oil-gas separation tank is communicated with the first oil filter oil inlet of the oil filter assembly through the first oil pipe, the first oil filter oil outlet of the oil filter assembly is communicated with the heat dissipation oil inlet of the radiator through the second oil pipe, the heat dissipation oil outlet of the radiator is communicated with the second oil filter oil inlet of the oil filter assembly through the third oil pipe, and the second oil filter oil outlet of the oil filter assembly is communicated with the compressor oil inlet of the screw compressor through the fourth oil pipe; A pressure-maintaining valve is installed at the top of the oil-gas separation tank, and a high-pressure gas output pipe is arranged on one side of the pressure-maintaining valve.

2. The airborne air compressor according to claim 1, characterized in that: An air intake pipe is installed on the air intake valve, an inlet end of the air intake pipe is connected to an air filter, and an air filter inlet port is arranged on the top of the air filter.

3. The airborne air compressor according to claim 1, characterized in that: An intake valve pressure switch is also installed on the intake valve, and the intake valve pressure switch is connected to the oil chamber of the oil-gas separation tank through the fifth oil pipe.

4. The airborne air compressor according to claim 1, characterized in that: A safety valve is arranged on the upper part of the tank wall of the oil-gas separation tank.

5. The airborne air compressor according to claim 1, characterized in that: A refueling port is arranged in the middle of the tank wall of the oil-gas separation tank, and a plug is screwed into the refueling port.

6. The airborne air compressor according to claim 1, characterized in that: An oil level gauge is arranged at the lower part of the tank wall of the oil-gas separation tank.

7. The airborne air compressor according to claim 1, characterized in that: An oil drain valve is arranged at the bottom center of the oil-gas separation tank.

8. The airborne air compressor according to claim 1, characterized in that: A gas delivery hose is installed between the gas delivery hard pipe and the separation tank air inlet pipe.

9. The airborne air compressor according to claim 1, characterized in that: The hydraulic motor is provided with a hydraulic oil inlet and a hydraulic oil outlet.

10. The airborne air compressor according to claim 1, characterized in that: The base includes a rectangular bottom frame, a main engine bracket, an oil filter bracket, and a separation tank bracket. The main engine bracket, the oil filter bracket, the separation tank bracket, and the radiator are respectively mounted on the rectangular bottom frame with bolts. A rubber shock-absorbing block is sandwiched between the main engine bracket and the rectangular bottom frame. The screw compressor is mounted on the main engine bracket, the oil filter assembly is mounted on the oil filter bracket, and the oil-gas separation tank is fixedly connected to the top of the separation tank bracket.

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