JPH05975U - Water booster water supply - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Simplification of the water supply device of the booster connected to the water jet device without circulating the entire discharge amount of the water supply pump to the suction side when the high pressure line is blocked. To reduce costs, improve durability,
Avoid increasing the water temperature so that water loss can be eliminated. [Structure] In a water supply line 21 'to the high-pressure cylinder 7, a bleed-off line 21 is branched and connected to form a throttle 20.
Water supply from the water supply pump 10 through the high pressure line 14
When the stop valve 14 'is blocked, the total amount of water supplied is not circulated to the suction side, about 1/10 is escaped from the bleed-off line 21, water temperature rise is avoided, the durability of the device is improved, and the mechanism can be simplified. To do so.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The disclosed technology is a booster for obtaining high-pressure water used in a water jet device or the like. Belongs to the technical field of water supply structure for.

[0002]

[Prior art]

  As is well known, in order to achieve the advanced functions of various production machines in recent years, Their structures are remarkably complex and elaborately constructed, thus their Multiple types of parts are used in the mechanical part, and mutual engagement is extremely precise. Must have been done.

[0003]   Therefore, the molding process of each part in the initial manufacturing assembly is highly precise. , Therefore, those moldings require correspondingly precise molding processing equipment. It is said that

[0004]   Therefore, mechanical processing such as mechanical cutting, cutting, and peeling is usually used for forming parts of mechanical equipment. Although a step is used, mechanical cutting with a cutter is conventionally used for cutting, peeling, cutting, etc. Cutting, fusing by burner, etc., piercing by laser beam, etc. are used. It was

[0005]

[Problems to be solved by the device]

  However, in the processing means such as the cutting in the conventional manner, the cutting of the processed surface From the viewpoint of roughness and thermal deterioration of the base material, etc., finish processing is performed through primary processing, secondary processing, etc. There is a disadvantage that it requires a plurality of steps such as work, resulting in high cost.

In order to cope with this, a high pressure of several hundred kg / cm ² to several thousands kg / cm ² or ultra-high pressure is applied to water in recent years to eject the water from a nozzle at a high speed such as supersonic speed. So-called water jet technology for cutting, cutting, peeling, etc. by jet dynamic pressure has been put to practical use, and abrasive water jet etc. in which high pressure water is mixed with garnet sand has also been put to practical use. ， Precision processing has come to be performed on not only synthetic resin but also metal.

[0007]   The water supply device attached to the booster for high pressure water of such water jet is For example, as shown in Japanese Patent Publication No. 48-22483, a switching valve is used. Then, reciprocate the low-pressure oil cylinder, and attach it to the piston of the oil cylinder. Move the plunger of the physically connected high-pressure cylinder back and forth to move the low-pressure water to the specified pressure. The pressure from the nozzle to the high pressure line via a check valve. ing.

[0008]   Thus, in the seed pressure intensifier, the high pressure discharged from the nozzle in the high pressure line The water supply of the water supply pump is designed to be 30 to 40% larger than the discharge of water. Therefore, 30-40% of the water supply is over when the water jet is operating. Is wasted from the relief valve as a waste, and water jet processing is interrupted. Even if it is inside, it is necessary to maintain a high Is the total amount of water supply similarly discharged from the relief valve by keeping it in a dynamic state? However, the running cost was extremely high.

As shown in FIG. 4, when the time t is plotted on the horizontal axis and the discharge amount Q of the water supply pump 10 is plotted on the vertical axis, the discharge amount Q when high pressure water is discharged from the nozzle 15 of the high pressure line 14 _{On the} other hand, if the discharge amount of the water supply pump 10 is Q ₁ , the overflow water Q ₁ -Q ₂ and the total amount of Q ₁ will be wastefully discharged from the relief valve 18 during stoppage.

[0010]   The problem of water supply in such a high-pressure water intensifier is the above-mentioned water jet. The same applies to the mechanism such as lubrication for machinery during high pressure operation. .

[0011]   In order to deal with this, the applicant's prior invention, Jpn. Pat. Appln. Is to carry out and put into practical use a water supply pump as shown in Fig. 3 so that there is no water supply loss. , Developed technology to avoid wasteful drainage of expensive water supply.

[0012]   That is, as shown in FIG. 3, switching to the piston 2 of the hydraulic low pressure cylinder 1 is performed. A hydraulic pump 5 operated by a motor 4 via a valve 3 is operated from an oil tank 6 Of the high pressure cylinder integrated with the piston 2 The water feed pump 10, which moves the plunger 8 of the da 7 forward and backward and is operated by the motor 9, The tap water is alternately supplied and discharged from the tank 11 via the check valves 12 and 12 '. The high-pressure water is passed through the check valves 13, 13 'and the high-pressure line 14 to the strike. Up through the up valve 14 'and let the water be discharged from the nozzle 15, The supplied water is stored in the accumulator 16 and the set pressure of the accumulator 16 is set. High pressure water from the high pressure cylinder 7 is discharged from the nozzle 15 within the force range. However, when the water supply pump 10 is stopped, high pressure water is supplied from the accumulator 16. Is supplied to the high-pressure cylinder 7, and the water supply pressure is the set limit pressure of the accumulator 16. When it further decreases, the water supply pump 10 operates to supply the high pressure cylinder 7 with The overflow water is supplied to the accumulator 16 and the accumulator 1 When the water supply pressure in 6 reaches the set upper limit pressure, the pressure is set so that the water supply pump 10 stops. The on / off operation is repeated via the switch 17.

[0013]   Therefore, even if the pump valve 14 is blocked, the relief valve 18 To avoid excessive drainage of overflow water and to avoid expensive water loss at all It was done.

[0014]   However, in the water supply device of such a system, as shown in FIG. An accumulator 16, a pressure switch 17, and a pressure relief valve 19 are provided. Therefore, the structure of the water supply line is complicated and the cost is high. However, the maintenance such as maintenance and inspection, control and adjustment is troublesome. There is a problem that becomes an agate, and the on / off operation control of the water supply pump 10 becomes extremely complicated. There was an inconvenience that

[0015]

[The purpose of the device]

  The purpose of the invention of this application is to attach to the water jet based on the above-mentioned prior art. Overflow water as a technical issue to be solved To return to the suction side of the water supply pump as much as possible to eliminate the loss of expensive water supply. However, if the water is not discharged in the water supply line, the water supply will Even if it circulates, it is possible to avoid the rise in the water temperature of the feed water due to the minimum amount of bleed-off. In this way, an excellent pressure booster that benefits the field of hydraulic technology application in various manufacturing machinery manufacturing industries The water supply system of

[0016]

[Means and actions for solving the problem]

  In line with the above purpose, the structure of the invention of this application, which has the scope of the above-mentioned utility model registration request as the gist In order to solve the above-mentioned problems, the A pressure pump sends pressure to a low pressure cylinder through a switching valve, and the piston (B) Operate and advance the plunger of the high pressure cylinder integrally connected to the low pressure cylinder. Retreat, receive water from the water supply pump and increase the pressure to a higher pressure than the check valve. It is made to be discharged from the nozzle through the stop valve by In the water supply line from the water supply pump to the high pressure cylinder, the stop bar of the high pressure line When the lube is blocked, the total discharge amount of the water supply pump is Excess water is circulated to the intake side through a relief valve as overflow water, and The bleed-off line on the discharge side of the water supply line is separate from the high-pressure cylinder side. And the throttle is interposed, and the discharge amount of the water supply pump is more Bleed off a predetermined amount of water such as 10% to allow it to escape. Avoid increasing the water temperature, avoiding the loss of heat energy, Do not install a humulator, pressure switch, pressure relief valve, etc. Reduce the operating cost and running cost, and improve the durability of the device. It is a technical measure that was adopted.

[0017]

【Example】   Next, one embodiment of the invention of this application will be described with reference to FIGS. It is Ri.

[0018]   It should be noted that parts that are the same as those in FIGS. 3 and 4 will be described using the same reference numerals.

[0019]   In the embodiment shown in FIG. 1, reference numeral 1 is a hydraulic low pressure cylinder, and A piston 2 is provided so as to be retractable, and is operated by a motor 4 via a predetermined switching valve 3. The oil from the oil tank 6 is sucked and discharged from the hydraulic pump 5 that is driven into and out of the chambers. The piston 2 is moved back and forth to perform a reciprocating operation.

[0020]   7 is a high-pressure cylinder, which is integrally connected to the low-pressure cylinder 1 A plunger 8 that is integrally extended to the tongue 2 is slidable, and the front and rear chambers Operates the water, which has higher purity than tap water and is processed from the tank 11 through the motor 9. The water supply pump 10 is alternately sucked and discharged through the check valves 12 and 12 '. The pressure in the high pressure line 14 is increased to a constant pressure, and the high pressure line 14 is stopped through the check valves 13 and 13 '. Water jet mixin (not shown) from the valve 14 'to the nozzle 15 Is discharged to the chamber.

[0021]   Thus, in the invention of this application, the water supply line to the high-pressure cylinder 7 is blocked. The lead-off line 21 is branched and connected, and the diaphragm 20 is interposed in the middle thereof. 20 is about 10% of the maximum discharge amount discharged from the high pressure line 14 by the nozzle 15. It is adjusted in advance so as to have a bleed-off amount.

[0022]   In addition, in the water supply line of the water supply pump 10, the relief valve 1 is provided in the water tank 11. 8 is installed so that the excess amount is circulated.

[0023]   In addition, 22 is an output meter and 23 is a check valve.

As shown in FIG. 2, in the invention of this application, when the discharge amount Q of the water supply pump 10 is plotted on the ordinate and the time t is plotted on the abscissa, the discharge amount Q ₁ of the water supply pump 10 is compared with the nozzle. The amount of high pressure water above 5 is set to Q ₂ , and the bleed-off amount of 1/10 to Q ₁ is set to Q _3, so that overflow water is discharged from the relief valve 18 when there is no throttle 20. It is designed to be able to sufficiently save water compared to the quantity Q ₁ -Q ₂ .

[0025]   In the above structure, the oil pump 5 is operated by the motor 4 and the oil tank 6 The oil near the valve operates the piston 2 of the low-pressure cylinder 1 via the switching valve 3, When the changeover valve 3 is changed over by a limit switch or the like not shown, The plunger 8 of the high-pressure cylinder 7 also moves back and forth as a unit, and the water supply pump by the motor 9 High-pressure line through check valves 13 and 13 'to absorb and discharge water from 10 to make it high pressure 14 through the stop valve 14 'from the nozzle 15 of the water jet Discharge high-pressure water to the mixing chamber, etc., and supply it with the check valves 12, 12 '. Backflow to the water line is blocked and strikes when the water jet is inactive. The discharge of the water supply pump 10 in the water supply line by the block of the up valve 14 '. The entire amount of the supplied and supplied water tries to circulate to the suction side through the relief valve 18, but That is, about 1/10 of the total discharge amount of the water supply nozzle 10 is breathed through the diaphragm 20. It is discharged from the drain line 21 and therefore the total amount of water supply in the water supply line is circulated. The rise in water temperature due to the ring is avoided, and the heat resistance of the valve seat of the water supply pump 10 is avoided. Be kicked.

[0026]   Of course, the loss of tap water can be sufficiently prevented.

[0027]   Then, when the water jet is put into operation again, the high pressure line 14 is When the water is restarted, the designed amount of water supplied from the water supply pump 10 is supplied from the high pressure line 14 to the nozzle. It will be pumped to 15.

[0028]   The embodiment of the invention of this application is not limited to the above-mentioned embodiment. For example, the adjustment type for the diaphragm can be adjusted appropriately according to the operating conditions. It is possible to adopt various modes such as a pull-down.

[0029]   Also, the applicable pressure booster is not limited to the one attached to the water jet device. Needless to say, the present invention can also be applied to oil injection into mechanical devices.

[0030]

[Effect of device]

  As described above, according to the invention of this application, the booster pressure basically used for the water jet etc. Plunger of high pressure cylinder integrally attached to low pressure cylinder in water supply device On the discharge line of the water supply pump that is connected to the intake and exhaust chambers of the pump through a check valve. The lead-off line is branched and connected to the bleed-off line to discharge all the water supply pump. High pressure sillin is provided by interposing a throttle that is set to 1/10 of the volume. When the high pressure line from the nozzle to the nozzle is blocked by a stop valve, etc. In the water supply line, the total discharge from the water supply pump is taken in through the relief valve on the suction side. By being partly escaped via the bleed-off line without being circulated to If the throttle is not provided, all overflow water will not be discharged from the relief valve. Excellent effect that running water costs can be reduced by preventing the loss of tap water. Is played.

[0031]   Moreover, as in the conventional mode, accumulators, pressure switches, pressure relief valves, etc. Does not need to be provided, the mechanism is simple, and the initial cost for manufacturing and assembly is high. Durability is improved from this point because it does not get stuck and no maintenance is required. In addition, it has the effect of controlling the on / off control of the water supply pump. Also eliminates the need for a system, which also helps reduce costs and facilitates maintenance. The advantage is that the durability of the device is improved.

[Brief description of drawings]

FIG. 1 is a schematic mechanism diagram of one embodiment of the device of the present application.

FIG. 2 is a schematic graph of water saving in bleed-off.

FIG. 3 is a schematic mechanism diagram of a water supply device for a pressure booster according to a conventional technique.

FIG. 4 is a schematic graph showing the relationship between the discharge amount of the overflow water nozzle and the discharge amount of the water supply pump.

[Explanation of symbols]

5 hydraulic pump 3 switching pump 1 Low pressure cylinder 7 High pressure cylinder 12,12 ', 13,13' Check valve 14 High pressure discharge line 10 water supply pump 18 relief valve 21 Bleed offline 20 aperture 21 'water supply line

Continued front page    (72) Creator Takaaki Kunidai             234 Matsumoto, Higashi-cho, Nishi-ku, Kobe-shi, Hyogo             Saki Heavy Industry Co., Ltd. Nishi-Kobe factory (72) Creator Kyoji Tsujida             3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo             No. Kawasaki Heavy Industries, Ltd.Kobe factory

Claims (2)

[Scope of utility model registration request] A high pressure cylinder connected to a low pressure cylinder connected to a hydraulic pump via a switching valve is connected to a high pressure discharge line via a check valve and to a water supply line having a water supply pump via another check valve. In a water supply device of a pressure booster in which a relief valve is connected to the water supply pump and connected to the water supply side and is externally installed, a bleed off line is branched and connected to the water supply line, and a throttle is provided at the bleed off line. The water supply device of the characteristic pressure booster. 2. The water supply device for a booster according to claim 1, wherein the throttle is adjusted to about 10% of the maximum water supply amount of the high-pressure line.