JP2018044589A - Actuation water supply/discharge device for supplying/discharging actuation water against fluid pressure actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide means capable of appropriately operating a fluid pressure actuator and in turn enabling environmental contamination caused by leakage of working fluid to be prevented.SOLUTION: An actuation water supply/discharge device S1 for a hydraulic pressure cylinder 1 includes actuation water feeding passages 12, 13, 14; actuation water returning passages 12, 13, 15; and actuation water supplying device R1. The actuation water supplying device R1 includes actuation water supplying parts 40, 50; a hydraulic cylinder part 35; and an actuation fluid supply/discharge part 60. The actuation water supplying parts 40, 50 are connected a first and a second actuation water supply passages 14a, 14b, suck actuation water from the first, second actuation water supply passages 14a, 14b at an actuation water storage tank to pressurize it and discharge the pressurized actuation water to the first and second actuation water supply passages 14a, 14b at the fluid pressure actuator. The hydraulic cylinder part 35 drives actuation water supplying parts 40, 50. The actuation fluid supply/discharge part 60 drives the hydraulic cylinder part 35.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a working water supply / discharge device that supplies and discharges working water to / from a fluid pressure actuator (water pressure actuator) driven by the pressure of working water.

  In general, a fluid pressure actuator, for example, a hydraulic cylinder in which a piston slidably inserted in a cylinder reciprocates by the pressure of hydraulic oil discharged from a hydraulic pump is a mechanical actuator that reciprocates similarly. For example, it has the advantages of simple structure, high output, and long life compared to rack and pinion mechanisms and ball screw mechanisms, etc., so it is widely used as actuators for various mechanical devices and civil engineering construction vehicles. ing. As one of such hydraulic cylinders, various single rod type double acting hydraulic cylinders having a simple structure and capable of hydraulically driving the piston in both directions of the cap side and the rod side are known. (For example, see Patent Documents 1 to 3).

  This kind of single rod type double acting hydraulic cylinder is usually provided with a hydraulic oil supply / discharge device for supplying and discharging hydraulic oil discharged from the hydraulic pump to and from the hydraulic cylinder. The hydraulic oil supply / discharge device includes a plurality of oil passages arranged between the hydraulic oil tank and the hydraulic cylinder, a hydraulic pump interposed in these oil passages, an oil passage switching valve, and a flow rate adjustment valve. Various hydraulic devices such as a relief valve and a check valve are provided.

JP-A-10-110710 JP 2003-74518 A JP 2004-68863 A

  As described above, the hydraulic cylinder and the hydraulic oil supply / discharge device are structures in which a large number of members constituting the hydraulic cylinder and the hydraulic oil supply / discharge device are connected to or connected to each other. For example, hydraulic oil leaks at a connection portion between one member and another member. There is. When such a hydraulic cylinder is for driving a sluice or the like disposed in, for example, a river or an irrigation channel, if the hydraulic oil leaks from the hydraulic cylinder or the hydraulic oil supply / discharge device, There is a problem that it is mixed with water flowing through rivers and irrigation canals, resulting in environmental pollution. In addition, if the hydraulic cylinder is for manufacturing equipment such as food, cosmetics, and chemicals where the hydraulic oil adheres fatally, if hydraulic oil leaks from the hydraulic cylinder or hydraulic oil supply / discharge device There is a problem that a large amount of product may have to be discarded due to adhesion or mixing of the hydraulic oil to the product.

  The present invention has been made to solve the above-described conventional problems, and appropriately operates a fluid pressure actuator in a facility including a fluid pressure actuator in which a working fluid is supplied and discharged by a fluid supply / discharge device. It is an object to be solved to provide a means that can prevent environmental pollution due to leakage of working fluid, or contamination of a product.

  According to the present invention made to solve the above-mentioned problems, a working water supply / discharge device for supplying / discharging working water to / from a fluid pressure actuator (water pressure actuator) driven by the pressure of working water includes: a working water introduction passage; And a working water recirculation passage and a working water supply device. Here, the working water introduction passage introduces the working water stored in the working water storage tank into the fluid pressure actuator. The working water recirculation passage recirculates the working water discharged from the fluid pressure actuator to the working water storage tank. The working water supply device sucks and pressurizes the working water stored in the working water storage tank via the working water introduction passage, and supplies it to the fluid pressure actuator.

  In the working water supply / discharge device according to the present invention, the working water supply device includes a working water supply unit, a hydraulic cylinder unit, and a hydraulic oil supply / discharge unit. Here, the working water supply unit is connected to or interposed in the working water introduction passage, and sucks and pressurizes the working water from the working water introduction passage on the working water storage tank side, and the pressurized working water is supplied to the fluid pressure actuator side. Is discharged into the working water introduction passage. The hydraulic cylinder unit drives the working water supply unit. The hydraulic oil supply / discharge unit supplies and discharges hydraulic oil stored in the hydraulic oil storage tank to the hydraulic cylinder unit to drive the hydraulic cylinder unit. In addition, in order to raise the viscosity, working water may contain 10-30 mass% glycerol or ethylene glycol, for example.

  In the working water supply / discharge device according to the first aspect of the present invention, the working water supply unit includes a cylindrical member, a double-action member, a first check valve, and a second check valve. . Here, the cylindrical member is connected to the working water introduction passage through the working water supply / discharge passage. The double-acting member can enter and retreat with respect to the hollow portion of the cylindrical member in a state where the gap with the hollow portion is sealed. The first check valve is interposed in the working water introduction passage on the working water storage tank side with respect to the connection portion of the working water supply / discharge passage and the working water introduction passage (hereinafter referred to as “passage connection portion”), The working water is prevented from flowing from the fluid pressure actuator side to the working water storage tank side. The second check valve is interposed in the working water introduction passage on the fluid pressure actuator side with respect to the passage connection portion, and prevents the working water from flowing from the fluid pressure actuator side to the working water storage side.

  In the working water supply / discharge device according to the first aspect of the present invention, the double-action member is preferably a shaft-like member having a smaller diameter than the inner diameter of the hollow portion of the cylindrical member. Further, the working water supply unit may include a first working water supply unit and a second working water supply unit that are driven by the same hydraulic cylinder unit. In this case, the double acting member of the first working water supply unit and the double acting member of the second working water supply unit are configured such that the entry / retreat state of each double acting member into the tubular member is opposite to each other by the hydraulic cylinder unit. It is preferable to drive in synchronism.

  In the working water supply / discharge device according to the second aspect of the present invention, the working water supply unit includes a cylinder member (tubular member), a piston member, a first check valve, and a second check valve (piston). Inner check valve). Here, the cylinder member is interposed in the working water introduction passage, one end portion or the vicinity thereof is connected to the working water introduction passage on the working water storage tank side, and the other end portion or the vicinity thereof is a fluid pressure actuator. It is connected to the working water introduction passage on the side. The piston member is fitted into the cylinder member, and partitions the hollow portion of the cylinder member to define a working water storage tank side water chamber (working water suction chamber) and a fluid pressure actuator side water chamber (working water discharge chamber). . The first check valve is interposed in the working water introduction passage on the working water storage side from the cylinder member, and prevents the working water from flowing from the working water introduction passage on the cylinder member side to the working water introduction passage on the working water storage side. To do. The second check valve is disposed in a through-hole penetrating the piston member in the direction in which the piston central axis extends, and prevents the working water from flowing from the fluid pressure actuator-side water chamber to the working water storage-side water chamber.

  According to the present invention, since the working water is used as the working fluid of the fluid pressure actuator that drives the equipment, even if the working water leaks in the fluid pressure actuator or its working water supply / drainage device, as in the case of the hydraulic actuator. No environmental pollution or product contamination. In addition, since the working water supply unit that supplies the working water to the fluid pressure actuator is driven by the hydraulic cylinder unit having a simple structure, the working water supply unit can be reliably operated with a simple configuration.

It is a circuit diagram showing typically the composition of the working water supply and discharge device concerning Embodiment 1 of the present invention. It is a circuit diagram which shows typically the structure of the working water supply / discharge device which concerns on Embodiment 2 of this invention. It is a longitudinal cross-sectional view of the principal part of the cylindrical member and piston which comprise the working water supply part of the working water supply / discharge device shown in FIG. It is a schematic diagram of the principal part of the working water supply / discharge device which concerns on the modification of Embodiment 1 of this invention comprised so that it could connect to an emergency hydraulic device. It is a typical side view of the emergency hydraulic apparatus shown in FIG.

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to FIG. As shown in FIG. 1, working water is supplied to and discharged from a single rod double acting hydraulic cylinder 1 which is a hydraulic actuator by a working water supply / discharge device S1. Although not shown in detail, the hydraulic cylinder 1 includes a substantially cylindrical cylinder 2 and a substantially cylindrical piston 3 fitted in a cylindrical hollow portion of the cylinder 2 (hereinafter referred to as “cylinder hollow portion”). And a piston rod 4 having an elongated cylindrical shape (round bar shape) attached to one end of the piston 3.

  The hydraulic cylinder 1 is of a vertical type in which the central axes of the cylinder 2, the piston 3 and the piston rod 4 are arranged so as to extend in the vertical direction (vertical direction). However, the working water supply / discharge device S1 (S2) according to the present invention is not limited to such a vertically placed hydraulic cylinder 1 but also has a hydraulic pressure arranged such that the cylinder central axis extends with an inclination with respect to the vertical direction. The present invention can also be used for a cylinder or a horizontal hydraulic cylinder arranged so that its central axis extends in the horizontal direction. Further, the working water supply / discharge device S1 (S2) according to the present invention can be widely used for a hydraulic actuator (for example, a hydraulic motor) other than the hydraulic cylinder.

  And the front-end | tip part (end part on the opposite side to piston 3) of the piston rod 4 is connected with the to-be-driven body 5 (for example, the door body of the sluice of a river, etc.) operated by the hydraulic cylinder 1. In the following, in order to show the positional relationship of each component of the hydraulic cylinder 1 simply, the position on the cap side in the hydraulic cylinder 1 is referred to as “up (upper)” and the position on the piston rod side is referred to as “lower (lower)”. I will say.

  The piston 3 can move (slide) in the vertical direction within the cylinder hollow portion. The cylinder hollow portion is partitioned vertically by the piston 3, the upper water chamber 6 is formed on the upper side (cap side) of the piston 3, and the lower water chamber 7 is formed on the lower side (piston rod side) of the piston 3. Has been. Thus, in the hydraulic cylinder 1, when pressurized working water is supplied to the upper water chamber 6, the piston 3 and the piston rod 4 are moved downward by the pressure of the working water, and the pressurized working water is When supplied to the lower water chamber 7, the piston 3 and the piston rod 4 are moved upward by the pressure of the working water, whereby the driven body 5 is moved in the vertical direction.

  The working water supply / discharge device S1 is provided with an electromagnetic water channel switching valve 11 which is a 4-port 3-position direction control valve. The first port P 1 of the water channel switching valve 11 is connected to the lower water chamber 7 via the rod side water channel 12, and the second port P 2 is connected to the upper water chamber 6 via the cap side water channel 13. Further, the working water supply passage 14 is connected to the third port P3 of the water channel switching valve 11, and the working water discharge passage 15 is connected to the fourth port P4. The tips of the working water supply passage 14 and the working water discharge passage 15 (the end portion not connected to the water channel switching valve 11) are introduced into a working water storage tank 16 that stores the working water. In the vicinity of the working water storage tank 16, a filter 17 for removing foreign matter in the working water is interposed in the working water supply passage 14, and a filter 18 and the filter 18 are arranged in parallel in the working water discharge passage 15. A check valve 19 is provided.

  The water path switching valve 11 switches the supply / discharge path of the working water to the hydraulic cylinder 1. Although not shown in detail, the water channel switching valve 11 is a solenoid valve controlled by a control device (not shown), pressurized by a working water supply device R1 described later, and supplied to the third port P3. A first state in which working water is supplied to the lower water chamber 7 via the rod side water channel 12, a second state in which the working water is supplied to the upper water chamber 6 via the cap side water channel 13, and the hydraulic cylinder 1 is operated. It can be set to any one of the third states (the state shown in FIG. 1) in which no water is supplied.

  In the first state, the working water in the upper water chamber 6 returns to the working water storage tank 16 via the cap-side water passage 13 and the working water discharge passage 15, and in the second state, in the lower water chamber 7. The working water returns to the working water storage tank 16 through the rod side water passage 12 and the working water discharge passage 15. Further, in the third state, the ends of the rod side water passage 12 and the cap side water passage 13 on the water passage switching valve side are closed, while the working water supply passage 14 and the working water discharge passage 15 communicate with each other. Note that the water channel switching valve 11 may be configured such that the working water supply passage 14 and the working water discharge passage 15 are closed in the third state.

  The rod-side water passage 12 has a pilot-operated check valve 21 for blocking the flow of working water from the water pressure cylinder side to the water passage switching valve in order from the water passage switching valve side to the water pressure cylinder side. A flow rate adjusting valve 22 having a first check valve configured by a flow rate adjusting valve and a check valve connected in parallel to each other, and a second configured by a flow rate adjusting valve and a check valve connected in parallel with each other. A flow rate adjusting valve 23 with a check valve is interposed in series. The flow rate adjusting valve 22 with the first check valve does not particularly regulate the flow of the working water from the hydraulic cylinder side to the water channel switching valve side, but adjusts the flow rate of the working water flowing from the water channel switching valve side to the hydraulic cylinder side. . Further, the flow rate adjusting valve 23 with the second check valve does not particularly regulate the flow of the working water from the water channel switching valve side to the hydraulic cylinder side, but the flow rate of the working water flowing from the hydraulic cylinder side to the water channel switching valve side. adjust. When a water pressure (pilot pressure) equal to or higher than the set pressure is applied to the cap side water passage 13, the pilot operated check valve 21 flows the working water from the water pressure cylinder side to the water passage switching valve side in the rod side water passage 12. Is acceptable.

  In order to adjust the pressure of the working water in the cap-side water passage 13 to be equal to or lower than the installation value, a first bypass water passage 25 that bypasses the water passage switching valve 11 and connects the cap-side water passage 13 and the working water discharge passage 15; A first relief valve 26 interposed in the one bypass water passage 25 is provided. Further, in the vicinity of the hydraulic cylinder 1, a first on-off valve 30 is provided in the rod-side water passage 12, while a second on-off valve 31 is provided in the cap-side water passage 13. A second bypass water channel 32 that connects the rod-side water channel 12 and the cap-side water channel 13 is provided on the water channel switching valve side from the first and second on-off valves 30 and 31, and a third bypass water channel 32 is connected to the second bypass water channel 32. An on-off valve 33 is interposed. The first to third on-off valves 30, 31, and 33 are manual valves that are mainly used when flushing (cleaning) the rod side water passage 12 and the cap side water passage 13.

  The working water supply passage 14 branches into a first working water supply passage 14a and a second working water passage 14b at a branch portion X on the working water storage tank side. Then, the first working water supply passage 14a and the second working water passage 14b are gathered at the gathering portion Y on the water channel switching valve side, and become a single working water supply passage 14 again. A working water supply device R1 is provided across (straddling) the first working water supply passage 14a and the second working water passage 14b. The working water supply device R1 is a working water pump that sucks and pressurizes the working water stored in the working water storage tank 16 through the working water supply passage 14 and supplies the pressurized water to the third port P3 of the water channel switching valve 11. . The working water supplied to the third port P3 is supplied to the hydraulic cylinder 1 via the rod side water passage 12 or the cap side water passage 13 according to the set state of the water passage switching valve 11. An accumulator 46 is provided in the first working water supply passage 14a, and a water pressure gauge 47 is provided in the working water supply passage 14 on the side of the water channel switching valve from the collecting portion Y.

  The working water supply device R1 includes a double rod type double acting hydraulic cylinder unit 35 driven by pressurized hydraulic oil, a first working water supply unit 40 and a second operation respectively driven by the hydraulic cylinder unit 35. A water supply unit 50 and a hydraulic oil supply / discharge unit 60 that supplies / discharges hydraulic oil to / from the hydraulic cylinder unit 35 are provided. Here, the hydraulic cylinder part 35 includes a cylindrical member 36 (cylinder), a double-acting piston 37 fitted into a cylindrical hollow part of the cylindrical member 36, and one end surface (first working water supply) of the double-acting piston 37. And a second rod 39 connected to the other end surface of the double-acting piston 37 (end surface on the second working water supply unit side). The hollow portion in the cylindrical member 36 is partitioned by a double-acting piston 37, and a first oil chamber 36a is formed on the first working water supply portion side, while a second oil chamber 36b is formed on the second working water supply portion side. Is formed.

  The first working water supply unit 40 is a first tubular member in a state where a gap between the first tubular member 41 having a cylindrical shape and the hollow portion of the first tubular member 41 is sealed with the hollow portion. A first double acting member 42 that can move (approach and retract) in the direction of the central axis of the member, and a first working water supply / discharge passage that connects the hollow portion of the first tubular member 41 to the first working water supply passage 14a. 43, a first upstream check valve 44, and a first downstream check valve 45. The first double-acting member 42 is a shaft-like member having a smaller diameter than the inner diameter (the diameter of the hollow portion) of the first cylindrical member 41. The first double acting member 42 is connected to the first rod 38 of the hydraulic cylinder part 35. Thus, as the double-acting piston 37 reciprocates, the first double-acting member 42 reciprocates in the central axis direction of the first cylindrical member. The first working water supply unit 40 sucks and pressurizes the working water from the first working water supply passage 14a on the working water storage tank side by the reciprocating motion of the first double-acting member 42, and the pressurized working water is channeled. It discharges to the 1st working water introduction channel | path 14a by the switching valve side (water pressure cylinder side).

  The second working water supply unit 50 is a second cylindrical member in a state where the gap between the cylindrical second cylindrical member 51 and the hollow portion of the second cylindrical member 51 is sealed with the hollow portion. A second double-acting member 52 that can move (approach and retract) in the direction of the central axis of the member, and a second working water supply / discharge passage that connects the hollow portion of the second cylindrical member 51 to the second working water supply passage 14b. 53, a second upstream check valve 54, and a second downstream check valve 55. The second double acting member 52 is a shaft-like member having a smaller diameter than the inner diameter (the diameter of the hollow portion) of the second cylindrical member 51. The second double acting member 52 is connected to the second rod 39 of the hydraulic cylinder portion 35. Thus, as the double-acting piston 37 reciprocates, the second double-acting member 52 reciprocates in the second cylindrical member central axis direction. The second working water supply unit 50 sucks and pressurizes the working water from the second working water supply passage 14b on the working water storage tank side by the reciprocating motion of the second double acting member 52, and the pressurized working water is passed through the water channel. It discharges to the 2nd working water introduction passage 14b by the side of a change valve (water pressure cylinder side).

  Thus, when the double-acting piston 37 of the hydraulic cylinder portion 35 reciprocates, the first working water supply portion 40 and the second working water passage 40b are connected to the first working water supply passage 14a and the second working water passage 14b. The pressurized working water is alternately sent from the working water supply unit 50 to the water channel switching valve side from the working water storage tank side. In short, the first and second working water supply units 40 and 50 are driven by the hydraulic cylinder unit 35 and cooperate with each other alternately to supply the working water stored in the working water storage tank 16 to the water channel switching valve 11 (and eventually). Supply to hydraulic cylinder 1).

  The hydraulic oil supply / discharge part 60 is provided with an electromagnetic oil passage switching valve 61 that is a 4-port 3-position direction control valve. The first port P5 of the oil passage switching valve 61 is connected to the first oil chamber 36a of the hydraulic cylinder portion 35 via the first oil passage 62, and the second port P6 is connected to the second oil chamber via the second oil passage 63. 36b. Further, the hydraulic oil supply passage 64 is connected to the third port P7 of the oil passage switching valve 61, and the hydraulic oil return passage 65 is connected to the fourth port P8. The tips of the hydraulic oil supply passage 64 and the hydraulic oil recirculation passage 65 (the end portion not connected to the oil passage switching valve 61) are introduced into a hydraulic oil storage tank 66 that stores the hydraulic oil. In the vicinity of the hydraulic oil storage tank 66, an oil filter 67 for removing foreign matters in the hydraulic oil is interposed in the hydraulic oil supply passage 64, and an oil filter 68 and the oil filter 68 are parallel to the hydraulic oil recirculation passage 65. And a check valve 69 disposed between the two.

  Further, a hydraulic pump 71 driven by the electric motor 70 is interposed in the hydraulic oil supply passage 64. The hydraulic pump 71 sucks the hydraulic oil stored in the hydraulic oil storage tank 66, pressurizes it, and supplies it to the third port P7 of the oil passage switching valve 61. Further, with respect to the flow direction of the hydraulic oil, the hydraulic oil supply passage 64 on the downstream side (oil path switching valve side) of the hydraulic pump 71 and the upstream side (oil path switching valve side) of the oil filter 68 and the check valve 69 are operated. Between the oil recirculation passage 65, a second relief valve 72 that adjusts the pressure of the hydraulic oil in the hydraulic oil supply passage 64, and a flow rate adjustment valve 73 that adjusts the flow rate of the hydraulic oil in the hydraulic oil supply passage 64, Is provided. Further, a hydraulic gauge 74 is provided in the hydraulic oil supply passage 64.

  The oil passage switching valve 61 switches the hydraulic oil supply / discharge route to the hydraulic cylinder portion 35. Although not shown in detail, the oil passage switching valve 61 is a solenoid valve controlled by a control device (not shown). The hydraulic oil pressurized by the hydraulic pump 71 and supplied to the third port P7 A first state in which the oil is supplied to the first oil chamber 36a of the hydraulic cylinder section 35 through the first oil passage 62; a second state in which the oil is supplied to the second oil chamber 36b through the second oil passage 63; The part 35 can be set to any one of the third states (the state shown in FIG. 1) in which no hydraulic oil is supplied.

  In the first state, the hydraulic oil in the second oil chamber 36b returns to the hydraulic oil storage tank 66 via the second oil passage 63 and the hydraulic oil return passage 65, and in the second state, the first oil chamber. The hydraulic oil in 36 a returns to the hydraulic oil storage tank 66 through the first oil passage 62 and the hydraulic oil recirculation passage 65. Further, in the third state, the ends of the first oil passage 62 and the second oil passage 63 on the oil passage switching valve side are closed. In the third state, the hydraulic oil supply passage 64 and the hydraulic oil recirculation passage 65 communicate with each other.

  In the working water supply device R1, the area of the cross section (cross section perpendicular to the central axis) of the first and second double acting members 42, 43 is larger than the area of the cross section of the double acting piston 37 of the hydraulic cylinder portion 35. If it makes small, the pressure of the working water in the 1st, 2nd cylindrical members 41 and 51 can be made higher than the pressure of the working oil in the 1st, 2nd oil chambers 36a and 36b.

  In the hydraulic water supply device R1, when the hydraulic oil pressurized by the hydraulic oil supply / discharge portion 60 is supplied to the first oil chamber 36a of the hydraulic cylinder portion 35, the double-acting piston 37 and the first and second rods 38, 39 is moved to the second working water supply part side. At this time, the first shaft member 42 is retracted in the central axis direction with respect to the first tubular member 41, and the working water in the first working water supply passage 14 a is sucked into the first tubular member 41. . In this case, due to the action of the first downstream check valve 45, the working water in the first working water supply passage 14 a on the water channel switching valve side does not flow into the first tubular member 41 (back flow). On the other hand, the second shaft member 52 moves forward in the direction of the central axis with respect to the second tubular member 51, and the working water in the second tubular member 51 is pressurized and discharged to the second working water supply passage 14b. Is done. In this case, due to the action of the second upstream check valve 54, the working water in the second cylindrical member 51 does not flow (backflow) into the second working water supply passage 14b on the working water storage tank side.

  When hydraulic oil pressurized by the hydraulic oil supply / discharge portion 60 is supplied to the second oil chamber 36b of the hydraulic cylinder portion 35, the double-acting piston 37 and the first and second rods 38 and 39 perform the first operation. It is moved to the water supply side. At this time, the second shaft member 52 is retracted in the central axis direction with respect to the second tubular member 51, and the working water in the second working water supply passage 14 b is sucked into the second tubular member 51. . In this case, due to the action of the second downstream check valve 55, the working water in the second working water supply passage 14 b on the water channel switching valve side does not flow (back flow) into the second cylindrical member 51. On the other hand, the first shaft-like member 42 moves forward in the direction of the central axis with respect to the first tubular member 41, and the working water in the first tubular member 41 is pressurized and discharged to the first working water supply passage 14a. Is done. In this case, due to the action of the first upstream check valve 44, the working water in the first tubular member 41 does not flow (backflow) into the first working water supply passage 14a on the working water storage tank side.

  Thus, the oil passage switching valve 61 of the hydraulic oil supply / discharge unit 60 is alternately set to the first state and the second state at predetermined time intervals, and the first oil chamber 36a and the second oil chamber 36a of the hydraulic cylinder unit 35 are set. By alternately supplying pressurized hydraulic oil to the oil chamber 36b, the pressurized hydraulic fluid is supplied from the first hydraulic fluid supply unit 40 and the second hydraulic oil supply unit 50 to the water channel switching valve 11, As a result, it can be supplied to the hydraulic cylinder 1.

  As the working water used in the working water supply / discharge device S1, ordinary water (for example, tap water, industrial water, etc.) can be used. In this case, even if the working water leaks from the hydraulic cylinder 1 or the working water supply / discharge device S1 in the vicinity thereof, no environmental pollution occurs. For example, when the driven body 5 is a sluice disposed in a river or the like, even if hydraulic water leaks from the hydraulic cylinder 1 or the like, the river is not polluted at all. However, in order to prevent corrosion of each device constituting the hydraulic cylinder 1 or the working water supply / discharge device S1 or to adjust the viscosity of the working water, as the working water, a corrosion inhibitor (rust inhibitor) or an increase Processed water containing additives such as a sticking agent may be used. In this case, in order to prevent environmental pollution when hydraulic water leaks from the hydraulic cylinder 1 or the hydraulic water supply / discharge device S1, environmentally friendly or harmless anticorrosives (for example, amine carboxylates, Ethylene glycol etc.) and thickeners (eg glycerin, ethylene glycol etc.) are preferably used.

  According to the working water supply / discharge device S1 according to the first embodiment, since the working water is used as the working fluid of the hydraulic cylinder 1, leakage of the working water occurs in the hydraulic cylinder 1 or the working water supply / discharge device S1 in the vicinity thereof. However, there is no environmental pollution or product pollution as in the case of hydraulic actuators. In the working water supply device R1, the first and second working water supply units 40 and 50 are driven by a hydraulic cylinder unit 35 having a simpler structure than a mechanical actuator, and high pressure working water is supplied to the hydraulic cylinder 1. Therefore, the hydraulic cylinder can be operated at a high output with a simple configuration.

(Embodiment 2)
Hereinafter, Embodiment 2 of the present invention will be described with reference to FIGS. 2 and 3. However, the basic configuration of the hydraulic cylinder 1 and the working water supply / discharge device S2 according to the second embodiment is the same as that of the hydraulic cylinder 1 and the working water supply / drainage device S1 according to the first embodiment. The configuration of the device (hydraulic cylinder unit and working water supply unit) is only different from that in the first embodiment. Therefore, in the following, in order to avoid duplication of explanation, differences from the first embodiment will be mainly described. In addition, in the components of the hydraulic cylinder 1 and the working water supply / discharge device S2 shown in FIG. 2, the same components as those of the hydraulic cylinder 1 and the working water supply / discharge device S1 shown in FIG. A reference number is attached.

  As shown in FIG. 2, the working water supply device R <b> 2 of the working water supply / discharge device S <b> 2 according to the second embodiment includes a hydraulic cylinder unit 80 in which the working oil is supplied and discharged by the working oil supply / discharge unit 60, 14 is provided with a working water supply unit 85 interposed between the two. The working water supply device R <b> 2 sucks and pressurizes the working water stored in the working water storage tank 16 through the working water supply passage 14 and supplies the pressurized water to the third port P <b> 3 of the water channel switching valve 11. The working water supplied to the third port P3 is supplied to the hydraulic cylinder 1 via the rod side water passage 12 or the cap side water passage 13 according to the set state of the water passage switching valve 11.

  The hydraulic cylinder unit 80 includes a cylindrical member 81 (cylinder), a double-acting piston 82 fitted into a cylindrical hollow portion of the cylindrical member 81, and one end surface of the double-acting piston 82 (an end surface on the working water supply unit side). And a rod 83 connected to each other. The hollow portion in the cylindrical member 81 is partitioned by a double-acting piston 82, and a first oil chamber 81a is formed on the working water supply portion side, while a second oil chamber 81b is formed on the opposite side of the working water supply portion 85. Is formed.

  The working water supply unit 85 is connected to a cylindrical tubular member 86, a piston 87 fitted in a hollow portion of the tubular member 86, and one end face of the piston 87 (an end portion on the hydraulic cylinder portion side). And a connecting rod 88. Here, the connecting rod 88 is connected to the rod 83 of the hydraulic cylinder unit 80. Thus, when the double-acting piston 82 of the hydraulic cylinder unit 80 reciprocates in the direction of the central axis of the cylindrical member, the piston 87 of the working water supply unit 85 reciprocates in the direction of the central axis of the cylindrical member correspondingly.

  The hollow portion in the cylindrical member 86 is partitioned by a piston 87, and a working water suction chamber 92 (see FIG. 3) is formed on the side opposite to the hydraulic cylinder portion 80, while a working water discharge chamber is formed on the hydraulic cylinder portion side. 93 (see FIG. 3) is formed. Here, the working water suction chamber 92 is connected to the working water supply passage 14 on the working water storage side from the working water supply unit 85, and the working water discharge chamber 93 is working water on the water channel switching valve side from the working water supply unit 85. It is connected to the supply passage 14. Further, in the vicinity of the working water supply unit 85, the reverse of preventing the working water from flowing from the working water supply unit 85 to the working water supply passage 14 from the working water supply unit 85 to the working water supply passage 14 on the working water storage tank side. A stop valve 89 is interposed.

  As shown in an enlarged view in FIG. 3, the piston 87 is provided with a columnar communication hole 91 that allows the working water suction chamber 92 and the working water discharge chamber 93 to communicate with each other. An in-piston check valve 90 is fitted into the communication hole 91. This in-piston check valve 90 includes a housing 94 (valve seat) fitted in the communication hole 91, a valve body 95 disposed in the housing 94, and a coil for biasing the valve body 95 toward the working water suction chamber. And a spring 96 for preventing the working water from flowing from the working water discharge chamber side to the working water suction chamber side. The gap between the cylindrical member 86 and the piston 87 is sealed by a piston packing 97.

  In the working water supply device R2, when the double-acting piston 82 of the hydraulic cylinder unit 80 reciprocates in the central axis direction of the cylindrical member, the piston 87 of the working water supply unit 85 reciprocates in the central axis direction of the cylindrical member. exercise. Here, when the piston 87 moves to the working water suction chamber side, the working water in the working water suction chamber 92 cannot flow into the working water supply passage 14 by the action of the check valve 89. It flows into the working water discharge chamber 93 via the stop valve 90. When the piston 87 moves to the working water discharge chamber side, the working water in the working water discharge chamber 93 cannot flow into the working water suction chamber 92 due to the action of the check valve 90 in the piston. The water supply unit 85 supplies the third port P3 of the water passage switching valve 11 in a pressurized state via the working water supply passage 14 on the water passage switching valve side. That is, the working water supply unit 85 sucks and pressurizes the working water from the working water supply passage 14 on the working water storage tank side by the reciprocating motion of the double-acting piston 82 and the piston 87, and switches the pressurized working water to the water channel. This is a working water pump that discharges to the working water introduction passage 14 on the valve side (hydraulic cylinder side).

  In the hydraulic water supply device R2, the area of the cross section (cross section perpendicular to the central axis) of the piston 87 of the hydraulic water supply section 85 is equal to the cross section of the double acting piston 82 of the hydraulic cylinder section 80 (perpendicular to the central axis). If it is smaller than the area of the cross section), the pressure of the working water in the working water discharge chamber 93 is higher than the pressure of the working oil in the first oil chamber 81a. Therefore, the pressure (water pressure) of the working water can be supplied to the hydraulic cylinder 1 at a pressure higher than the pressure (hydraulic pressure) of the working oil.

  Thus, the oil passage switching valve 61 of the hydraulic oil supply / exhaust unit 60 is alternately set to the first state and the second state at predetermined time intervals, and the first oil chamber 81a and the second oil chamber 81a of the hydraulic cylinder unit 80 are set. By alternately supplying pressurized hydraulic oil to the oil chamber 81b, pressurized hydraulic water is continuously supplied from the hydraulic water supply unit 85 to the water channel switching valve 11 and eventually to the hydraulic cylinder 1. Can do.

  According to the working water supply / discharge device S2 according to the second embodiment, since the working water is used as the working fluid of the hydraulic cylinder 1, leakage of the working water occurs in the hydraulic cylinder 1 or the working water supply / discharge device S2 in the vicinity thereof. However, there is no environmental pollution or product contamination as in the case of hydraulic actuators. Further, in the working water supply device R2, the working water supply unit 85 can be driven by the hydraulic cylinder unit 80 having a simple structure as compared with a mechanical actuator, and high pressure working water can be supplied to the hydraulic cylinder 1. With a simple configuration, the hydraulic cylinder can be operated at a high output.

  By the way, in the hydraulic water supply / discharge device S1 according to the first embodiment (the same applies to the hydraulic water supply device S2 according to the second embodiment), the function of the hydraulic oil supply / discharge portion 60 stops due to a power failure at the time of a disaster such as an earthquake or a typhoon. The working water supply device R1 may not operate normally. Therefore, when the hydraulic oil supply / discharge part 60 does not function, hydraulic oil is supplied to and discharged from the hydraulic cylinder part 35 by an emergency hydraulic device so that the hydraulic water supply device R1, and thus the hydraulic cylinder 1 can be operated without any trouble. Is preferred.

  In this case, as shown in FIG. 4, the emergency hydraulic device 100 is provided in the vicinity of the hydraulic oil supply / discharge unit 60. On the other hand, in order to enable connection between the hydraulic oil supply / discharge unit 60 and the emergency hydraulic device 100, the first oil passage 62 and the second oil passage 63 are respectively provided on the hydraulic cylinder portion side from the oil passage switching valve 61. A first multi-function valve 111 and a second multi-function valve 113 which are multi-purpose stop valves are provided. Although not shown in detail, each of the first multifunction valve 111 and the second multifunction valve 113 has a manual on-off valve and two external connection ports, and the on-off valve is a first oil passage 62. The second oil passage 63 can be opened and closed manually. The two external connection ports of each of the first and second multifunction valves 111 and 113 communicate with the first oil passage 62 or the second oil passage 63 on the opposite sides of the on-off valve.

  The emergency hydraulic apparatus 100 includes an external oil passage switching valve 101 and first to fourth external oil passages 102 to 105. And the 1st connector 110 for connecting with the external connection port of the 1st multifunctional valve 111 is attached to the front-end | tip part (end part on the opposite side to the external oil path switching valve 101) of the 1st external oil path 102, A second connector 112 for connecting to the external connection port of the second multi-function valve 113 is attached to the tip of the second external oil passage 103 (the end opposite to the external oil passage switching valve 101). In the third external oil passage 104, an external hydraulic pump 107 driven by an external power source 106 (for example, an engine, a motor, a motor with a battery, or the like) is interposed.

  When the emergency hydraulic apparatus 100 is used, the tip portions of the third oil passage 104 and the fourth oil passage 105 (the end portion on the side opposite to the external oil passage switching valve 101) are the hydraulic oil of the hydraulic oil supply / discharge portion 60. It is introduced (immersed) in the storage tank 66. The first connector 110 is connected to an external connection port on the hydraulic cylinder portion side of the first multi-function valve 111, and the second connector 112 is connected to an external connection port on the hydraulic cylinder portion side of the second multi-function valve 113. Is done. FIG. 4 shows a state before the emergency hydraulic apparatus 100 is connected to the hydraulic oil supply / discharge unit 60.

  The external oil path switching valve 101 switches the hydraulic oil supply / discharge path to the hydraulic cylinder unit 35. Although not shown in detail, the external oil passage switching valve 101 is a manual switching valve (may be an electromagnetic valve), and hydraulic oil pressurized by the external hydraulic pump 107 is supplied to the first external oil passage 102 and the first oil passage switching valve 101. The first state of supplying to the first oil chamber 36a of the hydraulic cylinder section 35 through the first oil passage 62, and the second state of supplying to the second oil chamber 36b through the second external oil passage 103 and the second oil passage 63. 2 and the third state (the state shown in FIG. 4) in which hydraulic oil is not supplied to the hydraulic cylinder portion 35 and is returned to the hydraulic oil tank 66 (FIG. 1). reference).

  As shown in FIG. 5, the emergency hydraulic apparatus 100 has a light weight and compact structure disposed in a frame 121 to which a moving wheel 120 is attached. Therefore, if the emergency hydraulic apparatus 100 is stored in an appropriate place, it can be quickly and easily moved and attached to the hydraulic oil supply / discharge section 60 in an emergency such as an earthquake. Therefore, even when the hydraulic oil supply / discharge unit 60 stops its function due to a power failure caused by a typhoon or an earthquake, the hydraulic cylinder 1 can be operated without any trouble.

  In addition, although not shown in figure, the hydraulic-hydraulic device S2 which concerns on Embodiment 2 of this invention shown in FIG. 2 is also an emergency hydraulic device similarly to the hydraulic-water supply-drainage device S1 which concerns on the modification of Embodiment 1. Of course, it can be constituted so that 100 can be installed.

  S1 Working water supply / discharge device (Embodiment 1), S2 Working water supply / drainage device (Embodiment 2), R1 Working water supply device (Embodiment 1), R2 Working water supply device (Embodiment 2), P1 first port , P2 2nd port, P3 3rd port, P4 4th port, P5 1st port, P6 2nd port, P7 3rd port, P8 4th port, 1 hydraulic cylinder, 2 cylinder, 3 piston, 4 piston rod, 5 driven body, 6 upper water chamber, 7 lower water chamber, 11 water channel switching valve, 12 rod side water channel, 13 cap side water channel, 14 working water supply passage, 14a first working water supply passage, 14b second working water Supply passage, 15 Working water discharge passage, 16 Working water storage tank, 17 Filter, 18 Filter, 19 Check valve, 21 Pilot operated check valve, 22 Flow control valve with first check valve, 23 Flow adjustment valve with check valve, 25 1st bypass water channel, 26 1st relief valve, 30 1st on-off valve, 31 2nd on-off valve, 32 2nd on-off water channel, 33 3rd on-off valve, 35 Hydraulic cylinder part, 36 Cylindrical member, 36a 1st oil chamber, 36b 2nd oil chamber, 37 Double acting piston, 38 1st rod, 39 2nd rod, 40 1st working water supply part, 41 1st cylindrical member, 42 1st shaft shape Member, 43 first working water supply / discharge passage, 44 first upstream check valve, 45 first downstream check valve, 46 accumulator, 47 water pressure gauge, 50 second working water supply unit, 51 second cylindrical member , 52 second shaft-shaped member, 53 second working water supply / discharge passage, 54 second upstream check valve, 55 first downstream check valve, 60 hydraulic oil supply / discharge section, 61 oil passage switching valve, 62 second 1 oil passage, 63 second oil passage, 64 hydraulic oil supply passage, 65 Hydraulic oil recirculation passage, 66 Hydraulic oil storage tank, 67 Oil filter, 68 Oil filter, 69 Check valve, 70 Electric motor, 71 Hydraulic pump, 72 Relief valve, 73 Flow rate adjustment valve, 74 Hydraulic gauge, 80 Hydraulic cylinder part, 81 Cylinder Member, 81a first oil chamber, 81b second oil chamber, 82 double acting piston, 83 rod, 85 working water supply section, 86 cylindrical member, 87 piston, 88 connecting rod, 89 check valve, 90 check in piston Valve, 91 communication hole, 92 working water suction chamber, 93 working water discharge chamber, 94 housing, 95 valve body, 96 coil spring, 97 piston packing, 100 emergency hydraulic device, 101 external oil path switching valve, 102 first external oil Path, 103 second external oil path, 104 third external oil path, 105 fourth external oil path, 106 external power source, 110 first connector, 111 1st multi-function valve, 112 2nd connector, 113 2nd multi-function valve.

Claims (6)

A working water supply and discharge device for supplying and discharging working water to and from a fluid pressure actuator driven by the pressure of the working water,
A working water introduction passage for introducing the working water stored in the working water storage tank into the fluid pressure actuator;
A working water return passage for returning the working water discharged from the fluid pressure actuator to the working water storage tank;
A working water supply device that sucks and pressurizes the working water stored in the working water storage tank and supplies the working water to the fluid pressure actuator via the working water introduction passage;
The working water supply device includes:
Connected or interposed in the working water introduction passage, sucks and pressurizes the working water from the working water introduction passage on the working water reservoir side, and discharges the pressurized working water to the working water introduction passage on the fluid pressure actuator side A working water supply unit,
A hydraulic cylinder unit for driving the working water supply unit;
An operating water supply / discharge device comprising: a hydraulic oil supply / discharge portion that supplies / discharges hydraulic oil stored in a hydraulic oil storage tank to drive the hydraulic cylinder portion with respect to the hydraulic cylinder portion. The working water supply unit is
A tubular member connected to the working water introduction passage through the working water supply / discharge passage;
A double-acting member capable of entering and retracting with respect to the hollow portion of the tubular member in a state where the gap with the hollow portion is sealed;
It is interposed in the working water introduction passage on the working water reservoir side with respect to the connection portion of the working water supply / discharge passage and the working water introduction passage, and prevents the working water from flowing from the hydraulic pressure actuator side to the working water storage side. A first check valve that
A second check valve that is interposed in the hydraulic water introduction passage on the fluid pressure actuator side with respect to the connection portion and prevents the hydraulic water from flowing from the fluid pressure actuator side to the hydraulic water storage side; The working water supply / drainage device according to claim 1, wherein:   The working water supply / discharge device according to claim 2, wherein the double-acting member is a shaft-like member having a diameter smaller than an inner diameter of a hollow portion of the cylindrical member. The working water supply unit includes a first working water supply unit and a second working water supply unit that are driven by the same hydraulic cylinder unit.
The double-acting member of the first working water supply unit and the double-acting member of the second working water supply unit are configured such that the hydraulic cylinder unit causes the double-acting members to enter and retract the cylindrical members in opposite directions. The hydraulic water supply / drainage device according to claim 2 or 3, wherein the hydraulic water supply / drainage device is driven in synchronism. The working water supply unit is
One end or its vicinity is connected to the working water introduction passage on the working water storage tank side, and the other end or its vicinity is on the hydraulic pressure actuator side. A cylinder member connected to
A piston member that is fitted into the cylinder member and partitions a hollow portion of the cylinder member to define a working water reservoir side water chamber and a fluid pressure actuator side water chamber;
A first check that is interposed in the working water introduction passage on the working water storage side from the cylinder member and prevents the working water from flowing from the working water introduction passage on the cylinder member side to the working water introduction passage on the working water storage side. A valve,
A second check valve disposed in a through-hole penetrating the piston member in a direction in which the piston central axis extends, and for preventing working water from flowing from the fluid pressure actuator side water chamber to the working water storage tank side water chamber. The working water supply / drainage device according to claim 1, wherein:   The working water supply / discharge device according to claim 1, wherein the working water contains 10 to 30% by mass of glycerin or ethylene glycol.

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