JPS637341Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a flushing device that has a function of intermittently supplying flushing oil to piping of various devices.

To explain the conventional flushing device with reference to FIG. 1, 001 is a tank, 002 is a hydraulic pump, and 0
03 is a motor for driving the hydraulic pump 002, 007 is a discharge pipe, 010 is a flushing pipe that requires flushing, 008 is a return pipe, 0
04 is a filter installed in the middle of the return pipe 008, and 005 is a relief valve installed to ensure the safety of the hydraulic circuit, and the flushing oil in the tank 001 is pressurized by the hydraulic pump 002 driven by the motor 003. , into the flushing pipe 010 via the discharge pipe 007. As the flushing oil flows through the flushing pipe 010, it washes away the dirt in the flushing pipe 010, and is sent to the filter 004 via the discharge pipe 008. The flushing oil is returned to tank 001 after passing through the dirt.

In the flushing device, the hydraulic pump 002
gear pumps or screw pumps are used. However, these pumps have a problem in that they are not effective in removing foreign matter from the flushing pipe because the temporal fluctuations in the discharge flow rate are relatively small.

This proposal addresses the above-mentioned problems, and includes a hydraulic pump that converts the flushing oil in the tank into high-pressure oil and supplies it to the flushing pipe via the discharge pipe, and a hydraulic pump that is connected to the same flushing pipe and has a filter interposed in the middle. The flushing device includes a return pipe line to the tank in which the flushing oil in the tank is pumped with high-pressure oil. and another hydraulic pump for supplying oil to the piston side oil chamber of the intermittent pressure feeder through a pipe switching valve, and the large diameter ram side oil chamber of the intermittent pressure feeder is connected to the flushing pipe. The purpose of the flushing device is to continuously pump high-pressure flushing oil into the flushing piping that requires flushing using a hydraulic pump (gear pump or screw pump), and to
An improved flushing device that can intermittently pump high-pressure flushing oil into the same flushing pipe using a separate hydraulic pump and an intermittent pressure feeder can generate shock waves within the flushing pipe, improving the foreign matter removal effect. It is in the point of providing.

Next, the flushing device of the present invention will be explained using an embodiment shown in FIGS. 2 and 3. In FIG. 2, 001 is a tank, 002 is a hydraulic pump, 003 is a motor for driving the hydraulic pump 002, and 007 is a discharge A pipe line, 006 is a check valve provided in the same discharge pipe line 007, 005 is a relief valve, 010 is a flushing pipe connected to the above discharge pipe line 007 and requires flushing, 008, 103 is a return connected to the same flushing pipe 010. 100 in FIGS. 2 and 3 is an intermittent pressure feeder, and the intermittent pressure feeder 100 includes a sleeve 110, a large diameter ram portion 120a, and a piston 120.
b ₁ , 120b ₂ and the oil chamber 11 on the large diameter ram part 120a side
2, 113 and hydraulic pressures 111, 114 on the pistons 120b ₁ , 120b ₂ side. In addition, _D1 is the diameter of the piston _120b1 , and A1 is the diameter of the piston 120b1.
0b ₁ is the pressure receiving surface, D ₂ is the diameter of the large diameter ram part 120a,
A ₂ is the pressure receiving surface of the large diameter ram portion 120a, A ₃ is the diameter of the piston 120b ₂ , and A ₃ is the pressure receiving surface of the large diameter ram _{portion 120a.}
This is the pressure receiving surface. In addition, 2 in FIG. 2 is another hydraulic pump, 3 is a motor for driving the hydraulic pump 2, 21 is a discharge pipe, and 22 is the return pipe 103.
The return pipes 23 and 24 in FIGS. 2 and 3 are connected to the oil chambers 111, 23 and 24 of the pistons 120b ₁ and 120b ₂ , respectively.
Supply/discharge pipe connected to 114, 6 is the same supply/discharge pipe 2
3, 24 and the pipe switching valve provided between the discharge pipe 21 and the return pipe 22, 102, 10 in FIG.
3 is the oil pressure 112, 1 on the large diameter ram portion 120a side.
A supply/discharge pipe connecting 13 and the tank 001,
150 is a check valve provided in the supply/discharge pipe 102, 104 in FIGS. 2 and 3 is a discharge pipe connecting the oil chamber 112 on the large diameter ram portion 120a side and the discharge pipe 007, and 140 is a check valve provided in the supply and discharge pipe 102; This is a check valve provided in the discharge pipe 104. Note that another embodiment of the above-mentioned intermittent pressure feeder 100 is shown in FIG. In the embodiments shown in FIGS. 3 and 4, the diameters D ₁ and D ₃ of the pistons and the diameter D ₂ of the large diameter ram portion are D ₂ ² −D ₃ ² /D ₁ ² > in the case of FIG. 3. 1.0, and in the case of FIG. 4, it is selected to satisfy D ₂ ² /D ₁ ² > 1.0.

Next, the operation of the flushing device will be explained.
Assuming that the large diameter ram portion 120a of the intermittent pressure feeder 100 is now moving to the left, at this time, the high pressure flushing oil discharged from the hydraulic pump 2 will be transferred to the oil chamber 111 via the line switching valve 6 line 23. be guided. Therefore, 120b and large diameter ram portion 120
a moves to the right. At that time, the flushing oil filled in the oil chamber 112 is guided from the discharge pipe 104 through the check valve 140 → the discharge pipe 007 to the flushing pipe 010 where flushing is required, and from the same flushing pipe 010 to the return pipe. Road 00
8,103 → tank 001 via filter 004
be returned to. At the same time, the oil in the oil chamber 114 flows through the pipe 24→
The water is returned to the tank 001 through the pipe switching valve 6 and the like. Also, the piston 120b and the large diameter ram portion 120
When a reaches the right end, the signal obtained at that time is sent to the pipe switching valve 6, which is switched, the pipe 24 is connected to the hydraulic pump 2, and the pipe 2
3 leads to tank 001. Therefore, oil chamber 11
4, the piston 120b and the large diameter ram portion 120a move to the left. At this time, the check valve 140 is closed, the check valve 150 is opened, the oil in the tank 001 is replenished into the oil chamber 112, and the oil in the oil chamber 111 is returned to the tank 001. Thereafter, the same action is repeated, and flushing oil for flushing is intermittently fed from the check valve 140 to the flushing pipe 010 that requires flushing. In this case, the oil can be sent in addition to the oil discharged from the hydraulic pump 002, or the oil can be sent alternately. Note that the check valve 006 is connected to the hydraulic pump 2
This is provided to prevent oil discharged from the pump from flowing into the hydraulic pump 002 side.

As mentioned above, this proposal consists of a hydraulic pump that converts the flushing oil in the tank into high-pressure oil and supplies it to the flushing pipe through the discharge pipe, and a hydraulic pump that is connected to the same flushing pipe and has a filter interposed in the middle. A flushing device comprising a return pipe, an intermittent pressure feeder comprising a large-diameter ram portion and a piston that reciprocates the large-diameter ram portion, and a pipe switching valve that converts flushing oil in the tank into high-pressure oil. The large-diameter ram oil chamber of the intermittent pressure feeder is connected to the flushing piping, and the oil chamber of the large diameter ram part of the intermittent pressure feeder is connected to the flushing piping. In addition to being able to continuously pump high-pressure flushing oil using a hydraulic pump, it is also possible to pump high-pressure flushing oil intermittently into the same flushing pipe using another hydraulic pump and an intermittent pump, creating shock waves within the flushing pipe. This makes it possible to improve the foreign matter removal effect. This eliminates the need for hammering the piping from the outside, resulting in labor savings. Also, the ratio of the area of the pressure receiving surface A ₂ of the large diameter ram part of the intermittent pressure feeder that pumps flushing oil intermittently to the area of the pressure receiving surface A ₁ of the piston that pushes the large diameter ram part.
By increasing A ₂ /A ₁ and choosing a hydraulic pump 2 with relatively high discharge pressure, it is possible to generate the desired large-flow pulsating flow even with a small and small-capacity hydraulic pump, reducing manufacturing costs. This has the advantage that the above effects can be achieved without increasing running costs.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing a conventional flushing device, Fig. 2 is a system diagram showing an embodiment of the flushing device according to the present invention, Fig. 3 is a vertical cross-sectional side view showing an embodiment of an intermittent pressure feeder, and Fig. 4 The figure is a longitudinal sectional side view showing another embodiment of the same intermittent pressure feeder. 001...Tank, 002...Hydraulic pump, 0
04...Filter, 007...Discharge pipe line, 00
8,103...Return pipe, 010...Flushing pipe, 2...Another hydraulic pump, 6...Pipe switching valve, 100...Intermittent pressure feeder, 120a...Large diameter ram section, 120b...Piston , 111, 114...
...Piston side oil chamber, 112...Large diameter ram side oil chamber.

Claims (1)

[Scope of utility model registration request] A hydraulic pump that converts flushing oil in a tank into high-pressure oil and supplies it to the flushing pipe through a discharge pipe, and a return pipe to the tank that is connected to the flushing pipe and has a filter interposed in the middle. The flushing device includes an intermittent pressure feeder comprising a large diameter ram portion and a piston that reciprocates the large diameter ram portion; and another hydraulic pump for supplying oil to a piston-side oil chamber of the intermittent pressure feeder, and a large-diameter ram-side oil chamber of the intermittent pressure feeder is connected to the flushing pipe.