WO2001040651A1 - Dispositif d'ecoulement de fluide a soufflet - Google Patents
Dispositif d'ecoulement de fluide a soufflet Download PDFInfo
- Publication number
- WO2001040651A1 WO2001040651A1 PCT/JP2000/008159 JP0008159W WO0140651A1 WO 2001040651 A1 WO2001040651 A1 WO 2001040651A1 JP 0008159 W JP0008159 W JP 0008159W WO 0140651 A1 WO0140651 A1 WO 0140651A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bellows
- valve
- chamber
- liquid chamber
- liquid
- Prior art date
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 102
- 238000009751 slip forming Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 abstract description 27
- 239000002002 slurry Substances 0.000 abstract description 10
- 239000013049 sediment Substances 0.000 abstract description 7
- 230000007246 mechanism Effects 0.000 description 29
- 239000000126 substance Substances 0.000 description 22
- 230000008602 contraction Effects 0.000 description 13
- 230000010349 pulsation Effects 0.000 description 13
- 238000003825 pressing Methods 0.000 description 9
- 230000007423 decrease Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 7
- 238000004062 sedimentation Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
- F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
- F15B1/103—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means the separating means being bellows
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/0009—Special features
- F04B43/0054—Special features particularities of the flexible members
- F04B43/0063—Special features particularities of the flexible members bell-shaped flexible members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/084—Machines, pumps, or pumping installations having flexible working members having tubular flexible members the tubular member being deformed by stretching or distortion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/088—Machines, pumps, or pumping installations having flexible working members having tubular flexible members with two or more tubular flexible members in series
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/20—Accumulator cushioning means
- F15B2201/205—Accumulator cushioning means using gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/315—Accumulator separating means having flexible separating means
- F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows
Definitions
- the present invention relates to a fluid device having a bellows typified by a bellows type pump and an accumulator for reducing pulsation of the pump.
- pumps used for circulating and transporting chemicals in various processes such as cleaning the surface of ICs and liquid crystals in semiconductor manufacturing equipment do not generate particles due to the operation of the pump.
- a bellows type pump is used (for example, Japanese Patent Application Laid-Open No. 3-179184).
- this type of pump since this type of pump generates pulsation due to reciprocating motion due to the expansion and contraction of the bellows, an accumulator is also used to reduce this pulsation (for example, Japanese Unexamined Patent Application Publication No. 6-17752.
- An object of the present invention is to solve such a problem. Therefore, even when a transfer liquid containing a sedimentary substance such as slurry is used, the sedimentary substance expands and contracts in velocity.
- An object of the present invention is to provide a fluid device having a bellows, such as a pump or an accumulator, which can prevent stagnation and accumulation in a part. Disclosure of the invention
- the fluid device having a bellows has a stretching portion in which a mountain-folding portion and a valley-folding portion are alternately formed vertically alternately inside the pump body, and extends in the axial direction.
- the expandable and deformable bellows is provided so as to be driven to expand and contract with the axis thereof and to form a liquid chamber inside the bellows, and the pump body is also provided.
- a suction port and a discharge port are provided on the inner bottom surface facing the liquid chamber, and a liquid is sucked into the liquid chamber from the suction port by the elongating operation of the bellows, and the bellows is opened.
- a fluid device comprising a pump configured to discharge the liquid in the liquid chamber from a discharge port by a contracting operation, wherein the expandable portion of the bellows is in an extended state.
- the upper and lower folds of each mountain fold The fold on the lower side of the part is formed so as to be inclined downward toward the axis.
- the vertical fold line of the bellows in the pump main body makes the lower folds of the bellows of the bellows lower.
- it is formed so as to be inclined down toward the axis, so that even when a liquid containing a precipitated substance such as slurry is used, the precipitated substance is developed. It can be prevented from settling inside the mountain fold and stagnating.
- Another fluid device having a bellows has a telescopic portion in which a mountain fold portion and a valley fold portion are continuously formed up and down alternately inside an accumulator main body, and an axial line is provided.
- a bellows capable of expanding and contracting along the direction is provided so that the axis of the bellows is vertical and a liquid chamber is formed inside the bellows and an air chamber is formed outside the bellows.
- An inflow port and an outflow port are provided on the inner bottom surface of the accumulator body facing the liquid chamber, and the pressure in the liquid chamber is balanced by the air pressure in the air chamber.
- a fluid device comprising an accumulator according to the present invention, wherein each of the mountain folds is provided when the expansion and contraction portion of the bellows is in an expanded state and in a contracted state.
- the lower fold of the upper and lower folds is inclined toward the axis. It was formed in the shape also Ru Nodea.
- the bellows in the accumulator main body is made vertical by setting the axis of the bellows to be vertical as in the case of the above-described pump.
- the folds on the lower side of each of the mountain folds of the bellows are formed so as to incline down toward the axis in both the contracted state and the extended state. Even when using a liquid containing sedimentation material, the sedimentation material is Prevents sedimentation inside the fold and stagnation.
- FIG. 1 is an overall vertical sectional front view of the pump of the first embodiment.
- FIG. 2 is a sectional view of the suction check valve incorporated in the pump of the first embodiment.
- FIG. 3 is an overall vertical front view showing another modification of the pump of the first embodiment.
- FIG. 4 is a sectional view showing a modified example of the suction check valve incorporated in the pump of the first embodiment.
- FIG. 5A is an enlarged cross-sectional view of the telescopic portion of the bellows of the pump of the first embodiment.
- FIG. 5B is an enlarged sectional view showing another modification of the bellows expansion and contraction portion of the pump of the first embodiment.
- FIG. 5C is an enlarged cross-sectional view showing still another modification of the bellows stretchable portion of the pump of the first embodiment.
- FIG. 6 is an overall longitudinal front view showing another modification of the pump of the first embodiment.
- FIG. 7 is an overall vertical sectional front view of the accumulator of the second embodiment.
- FIG. 8 is an enlarged longitudinal sectional front view of the automatic pressure adjusting mechanism of the accumulator of the second embodiment.
- FIG. 9A is an enlarged cross-sectional view of the bellows of the accumulator according to the second embodiment.
- FIG. 9B shows another example of the bellows of the pump of the second embodiment. It is an expanded sectional view showing a modification.
- FIG. 9C is an enlarged sectional view showing still another modification of the bellows expandable and contractible portion of the pump of the second embodiment.
- FIG. 10 is an overall vertical sectional front view showing another modified example of the accumulator of the second embodiment.
- FIG. 11 is an enlarged vertical sectional front view showing another modified example of the automatic pressure adjusting mechanism of the accumulator of the second embodiment.
- FIG. 12 is a plan view of the pressure automatic adjustment mechanism shown in FIG. Figure 1.3 is a cross-sectional view taken along the line FF in Figure 12.
- FIG. 14 is a cross-sectional view of the air supply valve of the pressure automatic adjustment mechanism shown in FIG.
- FIG. 15 is a cross-sectional view of the exhaust valve of the pressure automatic adjustment mechanism shown in FIG.
- Fig. 16 is a cross-sectional view taken along the line G-G in Fig. 11.
- Fig. 17A is an operation diagram of the air supply and exhaust valves of the pressure automatic adjustment mechanism when the fluid pressure in the accumulator bellows rises.
- Fig. 17B is an operation diagram of the guide shaft and guide sleeve of the pressure automatic adjustment mechanism when the fluid pressure in the accumulator bellows rises.
- Fig. 18A is an operation diagram of the supply and exhaust valves of the pressure automatic adjustment mechanism when the fluid pressure in the bellows of the accumulator decreases.
- FIG. 18B shows the guide shaft and guide tree of the pressure automatic adjustment mechanism when the fluid pressure in the accumulator bellows decreases.
- FIG. BEST MODE FOR CARRYING OUT THE INVENTION FIG. 1 shows a first embodiment in which the present invention is applied to a pump as a fluid device having a bellows according to the present invention.
- reference numeral 1 denotes a pump body, which has a cylindrical casing 3 whose upper end is closed by an upper wall 2 and a bottom wall 4 which hermetically closes the open lower end of the casing 3. You.
- the bottom wall 4 has an inflow channel 5 and an outflow channel 6 for liquid.
- a bottomed cylindrical bellows 7 that can expand and contract along the direction of the axis B is provided in the casing 3 with the axis B being vertical.
- the bellows 7 is formed of a fluororesin such as PTFE or PFA which is excellent in heat resistance and chemical resistance, and the lower peripheral edge 7a is formed by a ring-shaped fixing plate 8 to form a bottom wall 4a.
- the inner space of the pump body 1 is separated into a liquid chamber 9 inside the bellows 7 and an air chamber 10 outside the bellows 7 by pressing it tightly against the upper surface of the pump. Has been done.
- the pump body 1 is provided with a reciprocating drive device 22 for driving the bellows 7 to expand and contract.
- This reciprocating drive device 2 2 forms a cylinder 11 on the upper surface side of the upper wall 2 of the pump body 1 so that the axis of the cylinder 11 coincides with the axis B of the bellows 7.
- the piston 12 reciprocating in the inside 1 is connected to the center of the closed upper end 7b of the bellows 7 by the piston rod 13 penetrating the upper wall 2.
- pressurized air supplied from a pressurized air supply device (not shown) such as a compressor is applied to the cylinder 11 and the upper wall 2.
- the air is supplied alternately to the inside of the cylinder 11 and the air chamber 10 via the air holes 14 and 15 formed respectively.
- the proximity sensors 16a and 16b are attached to the cylinder 11 while the sensor sensing members 17 are attached to the screws 12 and the screws 11 Pressurized air supplied from the pressurized air supply device by the sensor sensing member 17 alternately approaching the proximity sensors 16a and 16b as the tongue 12 reciprocates.
- the supply to the cylinder 11 and the supply to the air chamber 10 are automatically and alternately switched.
- a suction port 18 and a discharge port 19 are opened at the inner bottom surface 4 a of the bottom wall 4 facing the liquid chamber 9 so as to communicate with the inflow channel 5 and the outflow channel 6, respectively.
- the suction port 18 is provided with a check valve 20 for suction, and the outflow path 6 is provided with a check valve 21 for discharge.
- the suction check valve 20 is composed of a cylindrical valve casing 201 and a valve body 202 composed of a ball, and the valve casing 201 is composed of The axis D is made vertical, and is firmly fixed to the suction port 18 by screwing and engaging means.
- the check valve 20 for suction in the illustrated example has a structure in which a valve element 202 is provided in two stages, upper and lower.
- the valve casing 201 is divided into upper and lower parts and consists of the first valve casing 201a and the second valve casing 201b, and the first valve casing 201a and the second valve casing 201b.
- a first valve body 202a and a second valve body 202b are provided in the valve casing 201b, respectively.
- the first valve casing 201 a is formed in a cylindrical shape, and has an inlet 203 at the lower end, and a male screw 204 provided on the outer periphery thereof is connected to a bottom wall 4. It is fixed to the bottom wall 4 with its axis D vertical by screwing it into a female screw 205 provided on the lower side of the inner periphery of the suction port 18.
- the second valve casing 201b is formed in a cylindrical shape having a diameter larger than that of the first valve casing 201a, and has an outlet 206 at the upper end, and the outer periphery of the lower end.
- the female screw 208 provided on the inner wall of the suction port 18 of the bottom wall 4 is larger than the internal diameter of the female screw 205 on the bottom wall 4.
- the female screw 209 provided on the inner circumference of the lower end is screwed into the male screw 210 on the upper outer circumference of the first valve casing 201a. It is fixed to the bottom wall 4 so as to protrude into the liquid chamber 9 concentrically with the valve casing 201a.
- a valve seat body 2 1 2 having a valve seat 2 1 1 is provided between the upper end of the first valve housing 201 a and the lower end of the inner circumference of the second valve casing 201 b. Force; incorporated. Also, a valve seat 2 13 is provided at the open end of the inflow passage 5 facing the inlet 203 at the lower end of the first valve casing 201.
- the first and second valve casings 201 a and 20 lb and the first and second valve bodies 202 a and 202 b have the same heat resistance and chemical resistance as the material of the bellows 7. It is made of PTFE, PFA, and other fluorine resins that excel in durability.
- the first valve body 202 a comes into close contact with the valve seat 213 in the first valve casing 201 a by its own weight, and the second valve casing 201 b
- the second valve body 202 b is brought into close contact with the inner valve seat 2 1 1 by its own weight S to prevent the liquid from flowing back.
- the first and second valve bodies 202 a and 202 b are separated upward from the valve seats 2 13 and 2 11, respectively, and open, so that the liquid from the inflow passage 5 is discharged.
- the outlet 206 sucks into the liquid chamber 9.
- the valve body is assembled in two stages in the upper and lower stages in a valve casing that can be divided into two parts like the structure of the check valve 20 for suction. are doing.
- both the suction check valve 20 and the discharge check valve 21, or one of them may be configured as a single valve body.
- a valve element 202 and a spring for pressing the valve element 202 against a valve seat are provided. It is also possible to employ a suction check valve 20 and a discharge check valve 21 having a valve structure in which the valve 300 and the valve 300 are incorporated in the valve casing 201.
- the bellows 7 is driven to expand and contract by the reciprocating motion of the piston 12 in the cylinder 11, and thus the suction check valve 20 and the suction check valve 20 are formed.
- the discharge check valves 21 alternately open and close to suck the transfer liquid from the inflow channel 5 into the liquid chamber 9 and discharge the transfer liquid from the liquid chamber 9 to the discharge channel 6 alternately.
- the predetermined pump action is performed repeatedly.
- the present invention provides a pump according to the present invention, wherein the telescopic portion formed by continuously forming the mountain fold portions 71 and the valley fold portions 72 of the bellows 7 alternately in the up and down direction is in an extended state. Therefore, even in the extremely contracted state shown in FIGS. 5A, 5B, and 5C, the folds 71a and 71b at the top and bottom of each mountain fold 71 are also provided. It is characterized in that the lower fold 71 is formed so as to be inclined downward toward the axis B.
- the inclination angle ⁇ of the lower fold portion 71b in the contracted state of each of the mountain fold portions 71 described above is preferably 1 to 45 °. Or 5 to 15 °.
- the upper fold 71a of each mountain fold 71, under its contracted state has the same inclination angle as the lower fold 7lb as shown in Figure 5A. It can be formed in an inclined shape, as shown in Fig. 5B, in parallel with a horizontal line L perpendicular to the axis B, or in an axis B as shown in Fig. 5C. It is optional to form it into a shape that slopes upward toward.
- the corners of the respective folds of the mountain fold 71 and the valley fold 72 have corners in the example shown in the figure, but the corners are marked with a two-dot chain line R. You may.
- the transfer liquid contains sedimentary substances such as slurry. Even when the transfer liquid is used, in Bellows 7, the sedimented substance easily slides down along the slope below the inner surface of the lower fold 71b of the mountain fold 71. No stagnation on the inner surface of the 7 lb fold.
- the inner bottom surface 4a of the liquid chamber 9 is lowered by 1 to 45 °, more preferably 5 to 15 °, as shown in FIG.
- the discharge port 19 is preferably formed at the lowest position of the inner bottom surface 4a which is formed in an inclined shape, and is preferably formed in a conical shape. However, it does not matter that the discharge port 19 is on the axis B of the bellows 7 or is located at a position deviated from the axis B.
- the inner bottom surface 4a of the liquid chamber 9 is formed so as to be inclined downward toward the discharge port 19, the liquid containing sedimentary substances such as slurry may be formed in the inner bottom surface 4a. a can be discharged smoothly to the discharge port 19 along the inclined surface below the a, and it is possible to prevent the sedimented substance from collecting on the inner bottom surface 4a and solidifying. Therefore, the sedimentation and sedimentation of the precipitate in the pump can be more effectively prevented in combination with the prevention of the sediment of the precipitate in the elastic portion of the bellows 7.
- reference numeral 25 denotes an accumulator body, a cylindrical casing 27 having an upper end closed by an upper wall 26, and a bottom wall 28 closing the open lower end of the casing 27 in an airtight manner. And.
- a bottomed cylindrical bellows 29 which can expand and contract along the direction of its axis C is provided in the casing 27 so that the axis C extends vertically.
- the bellows 29 is formed of a fluororesin such as PTFE and PFA, which have excellent heat resistance and chemical resistance, and the lower peripheral edge 29 a of the lower opening is formed by an annular fixing plate 30.
- the inner space of the accumulator body 25 is filled with the liquid chamber 31 inside the bellows 29 and the bellows 2 by being pressed and fixed to the upper surface of the wall 28 in an airtight manner. It is isolated from the air chamber 3 2 outside the 9.
- a liquid inflow path 33 and an outflow path 34 are formed in the bottom wall 28 of the accumulator body 25, and the liquid flows into the inner bottom surface 28a facing the liquid chamber 31 of the bottom wall 28.
- the mouth 23 and the outlet 24 are opened so as to communicate with the inlet 33 and the outlet 34, respectively.
- the accumulator A is used, for example, by being arranged in the transfer liquid piping of the pump P in order to reduce the pulsation of the pump P of the first embodiment.
- the inflow path 3 3 is connected to the downstream end of the outflow path 6 of the pump P, and the transfer liquid discharged through the discharge check valve 21 of the pump P is supplied to the liquid chamber 3 1.
- the air is temporarily stored in the air chamber 32, and the air for reducing the pulsation of the pump P is filled in the air chamber 32.
- the pulsation caused by the discharge pressure of the transfer liquid discharged from the liquid chamber 9 of the pump P is absorbed and attenuated by the change in the capacity of the liquid chamber 31 caused by the expansion and contraction of the bellows 29. It is configured as follows.
- an opening 35 for an air inlet / outlet is formed near the center of the outer surface of the upper wall 26 of the casing 27 of the accumulator A, and the inside of the opening 35 is formed.
- Valve case with flange 36 The flange 37 is fitted and the flange 36 is detachably fastened to the outside of the upper wall 26 with a bolt 38 or the like.
- the valve case 37 has an air supply port 39 and an exhaust port 40 arranged side by side in parallel.
- the air supply port 39 is supplied with air having a pressure equal to or higher than the maximum pressure value of the transfer liquid into the air chamber 32 to supply air to the air chamber 39.
- An automatic air supply valve mechanism 41 for increasing the filling pressure in 32 is provided.
- the exhaust port 40 is evacuated from the air chamber 32 to reduce the filling pressure in the air chamber 32.
- a valve mechanism 42 is provided.
- the automatic air supply valve mechanism 41 has an air supply valve chamber 43 formed in the valve case 37 in communication with the air supply port 39, and slides along the axial direction in the valve chamber 43.
- An air supply valve 44 that automatically opens and closes the air supply port 39, a spring 45 that constantly urges the valve 44 to the closed position, and air supply to the inner end.
- the valve body 4 4 has a valve seat 46, and has a through hole 47 communicating the air supply valve chamber 43 with the air chamber 32, and is screwed and fixed to the valve case 37. Guide material
- the automatic exhaust valve mechanism 42 is exhausted to the valve case 37.
- An exhaust valve chamber 50 ′ formed in communication with the air port 40, and an exhaust valve element 51, which is slidable along the axial direction in the valve chamber 50 and opens and closes the exhaust port 40.
- An exhaust valve rod 53 provided with the valve element 51 at the front end and a flange 52 at the rear end, and screwed and fixed in the exhaust valve chamber 50, and the exhaust valve rod 53 is inserted.
- Receiving body 5 5 having a through hole 5 4, and the slide itself passes through the rear end of the exhaust valve rod 5 3, and is stopped by the flange 5 2.
- an opening spring 58 arranged between the receiver 55 and the slider 56.
- the inner diameter of the through hole 54 of the spring receiver 55 is larger than the shaft diameter of the exhaust valve rod 53, and a gap 59 is formed between the two, and the gap 59 is formed through the gap 59.
- the exhaust valve chamber 50 and the air chamber 32 are in communication.
- the exhaust valve body 51 closes the exhaust port 40 and the flange 52 at the rear end of the exhaust valve rod 53 is closed.
- the inner force at the closed end 56a of the dar 56 is separated by a stroke F from the inner surface.
- the air chamber side end of the valve case 37 is extended in the direction of the air chamber 32 as indicated by the phantom line 60 in FIG. 8, and a bellows 29 connects the liquid chamber 31 to the extended end.
- a stopper for restricting further movement of the bellows 29 when the valve push rod 49 is moved beyond the predetermined stroke E in the direction of enlargement until the valve push rod 49 is operated. 6 Set 1 and check.
- the pump discharge pressure generates pulsation due to the repetition of peaks and valleys.
- the transfer liquid discharged from the liquid chamber 9 of the pump P through the discharge check valve 21 passes through the inflow path 33 and the inflow port 23 of the accumulator.
- the liquid is sent to the inside 1, temporarily stored in the liquid chamber 31, and then flows out from the outlet 24 to the outlet 34.
- the discharge pressure of the transfer liquid is at the peak of the discharge pressure curve, the transfer liquid expands and deforms the gas outlet 29 so as to increase the capacity of the liquid chamber 31. Pressure is absorbed.
- the flow rate of the transfer liquid flowing out of the liquid chamber 31 is smaller than the flow rate supplied from the pump P.
- the amount of elongation and deformation of the bellows 29 beyond the storage port E is restricted, and the capacity of the liquid chamber 31 is prevented from being excessively increased.
- the stopper 61 is provided at the end of the valve case 37 on the air chamber side, the closed upper end portion 29b of the bellows 29 will correspond to the stopper 61. contact with, for Vero over 2 9 Ru can be surely prevented from excessively extending deformation, Ru advantageously der its damage prevention.
- the bellows 29 contracts toward the reference position S with the upper screen of the sealing pressure in the air chamber 32, so that the valve push rod 49 closes the bellows 29.
- the air supply valve body 44 After being separated from the upper end 29b, the air supply valve body 44 returns to the closed position again, and the sealing pressure in the air chamber 32 is fixed at the adjusted state.
- the automatic exhaust valve mechanism 4 2 is moved in accordance with the movement of the closed upper end 29 b of the bellows 29 in the contraction direction b.
- the slider 56 moves in the contraction direction b of the bellows 29 by the biasing action of the opening spring 58, and the closed end 56 of the slider 56 is moved.
- the inner surface of a is engaged with the flange 52 of the exhaust valve rod 53.
- the exhaust valve rod 53 moves in the direction b, and the exhaust valve element 51 opens the exhaust port 40, so that the air enclosed in the air chamber 32 is discharged from the exhaust port 40 into the atmosphere. And the filling pressure in the air chamber 32 decreases. Therefore, the amount of contraction deformation beyond the stroke F of the bellows 29 Therefore, the capacity of the liquid chamber 31 is prevented from being excessively reduced. Since the bellows 29 extends toward the reference position S with a decrease in the filling pressure in the air chamber 32, the slider 56 is moved to the closed upper end of the bellows 29. 2 9 While pressing in b and moving in the a direction, the opening spring 58 is compressed, and the exhaust valve body 51 is exhausted again by the urging action of the closing spring 57. Close mouth 40.
- the sealing pressure in the air chamber 32 is fixed in an adjusted state.
- the pulsation is efficiently absorbed and the pulsation width is suppressed to be small irrespective of the fluctuation of the discharge pressure from the liquid chamber 9 of the pump P.
- the present invention is similar to the embodiment of the pump P described above, except that the bellows 29 has a mountain-folding portion 291 and a valley-folding portion 2992.
- 9A, 9B, and 9C when the stretched portion, which is formed by continuously forming the upper and lower portions alternately, is in the stretched state.
- the lower fold 291b of the upper and lower folds 291a and 291b of the portion 291 is formed so as to be inclined downward toward the axis C. It has a characteristic.
- the inclination angle ⁇ of the lower fold-like portion 291 b under the contracted state of each of the mountain-folded portions 291, that is, the angle formed with the horizontal line L orthogonal to the axis C is 1 to 45 °. And more preferably between 5 and 15 °.
- the upper fold 291a of each mountain fold 291, when contracted, has the same slope as the lower fold 2991b, as shown in Figure 9A. It can be formed in a downwardly sloped manner at an angle, as shown in Fig. 9B, and horizontally parallel to a horizontal line L perpendicular to the axis C, or as shown in Fig. 9C.
- H axis It is optional to form it so that it slopes up toward c.
- the corners of each of the mountain folds 291 and the valley folds 292 are provided with corners in the illustrated example, and the corners are rounded (two-dot chain line R). ) May be added.
- the sedimentary substance in the bellows 29 is formed by the folds on the lower side of the mountain fold part 291. It is easy to slide down along the inclined surface below the inner surface of the part 291b, and there is no stagnation and accumulation on the inner surface of the fold-like part 2991b.
- the inner bottom surface 28a of the liquid chamber 31 is located at an angle of 1 to 45 °, more preferably 5 to 15 °, toward the outlet 24 as shown in FIG.
- the outlet 24 is formed at the lowest position of the inner bottom surface 28a, which is formed in an inclined shape, and is preferably formed in a conical shape.
- the outlet 24 is located on the axis C of the bellows 29 or is located at a position deviated from the axis C.
- the liquid containing sedimentary substances such as slurry is also contained in the liquid chamber 31. It can be discharged smoothly down the bottom surface 28 a along the inclined surface toward the outlet 24, and it is also possible to prevent sedimentary substances from accumulating on the inner bottom surface 28 a and solidifying. As a result, sedimentation and segregation of sediment in the accumulator can be more effectively prevented in combination with prevention of sedimentation of the sediment in the expansion and contraction portion of the bellows 29. can do.
- the automatic air supply It has a pressure automatic adjustment mechanism consisting of a lubrication mechanism 41 and an automatic exhaust valve mechanism 42.
- This automatic pressure adjusting mechanism may have the following configuration.
- the pressure automatic adjustment mechanism forms an opening 35 near the center of the upper wall 26 of the casing 27 of the accumulator, and this opening is formed.
- a valve case 37 with a built-in air supply / exhaust valve is fitted inside 35, and a flange 36 attached to the outer periphery of the rear end of the valve case 37 is bolted to the upper wall 26.
- the supply / exhaust valve control panel 70 is attached to the valve case 37. Arrange them so that they face each other.
- an air supply port 39 and an air port 40 are formed side by side.
- the air supply port 39 is supplied with air having a pressure equal to or higher than the maximum pressure value of the transfer liquid into the air chamber 32 to supply the air.
- An automatic air supply valve mechanism 41 for increasing the filling pressure in the chamber 32 is provided.
- the exhaust port 40 is evacuated from the air chamber 32 to automatically reduce the pressure in the air chamber 32.
- a valve mechanism 42 is provided.
- the automatic air supply valve mechanism 41 has a female screw hole 171, which is formed in the rear end face of the valve case 37 so as to communicate with the air supply port 39.
- Air supply valve holder One 172 is screwed into the female screw hole 171, forming an air supply valve chamber 43 at the front end and a valve seat 4 6 at the inner bottom of the air supply valve chamber 43.
- a valve stem ⁇ through hole 74 is formed so as to communicate coaxially with the air supply valve chamber 43.
- a communication hole 7 5 for communicating the air supply valve chamber 43 with the air chamber 32 through the valve rod insertion hole 74 is provided.
- a communication hole 75 By providing the communication hole 75 in this way, the responsiveness of the air chamber 32 to a pressure change can be improved.
- the air supply valve holder 17 2 moves the air supply valve 36 in the air supply valve chamber 4 3 along the axial direction and incorporates it into the air supply valve holder 4 3. Is inserted.
- the rear end of the stem 49 protrudes rearward of the air supply valve holder 17 2.
- the valve stem insertion hole 74 has an inner diameter larger than the outer diameter of the valve stem 49, and a large-diameter hole portion 74a that forms a communication gap with the valve stem 49, and the outside of the valve stem 49. It is formed in a stepped shape having a guide hole portion 74 b that is slightly larger than the diameter and that slides on the valve stem 49 with almost no clearance.
- the supply valve body 44 moves straight in the supply valve chamber 43 in the axial direction by sliding the valve rod 49 through the guide holes 74b. Can be done.
- the air supply valve body 44 is urged by the spring 45 so as to be always in a closed position in which the air supply valve body 44 closely contacts the valve seat 46.
- the air supply valve body 44 comes into air-tight contact with the valve seat 46 via the O-ring 76.
- the O-ring 76 is fitted in an arc-shaped groove 77 formed in a corner of the rear end face of the air supply valve body 44 so that the O-ring 76 is mounted so as not to come off. Have been.
- the air supply valve element 44 is in close contact with the valve seat 46 of the valve stem holder 17 2.
- the end 49a of the valve stem 49 facing the air chamber 32 has the upper end 29b of the bellows 29 and a predetermined stop. It is separated only by a block and then it is played.
- the automatic exhaust valve mechanism 42 has an exhaust valve chamber 50 having a circular cross section on the rear end face of the valve case 37 and an inner diameter larger than the inner diameter of the exhaust valve chamber 50.
- the female screw hole 78 is formed so as to communicate with the exhaust port 40 coaxially.
- the exhaust valve body 51 which has a flat surface 51a at the opposed portion on the circumference as shown in Fig. 14, is moved along its axial direction.
- An exhaust valve rod 53 is physically connected to the exhaust valve element 51, and the exhaust valve rod 53 is screwed into the female screw hole 78 and fixed to the exhaust valve rod holder 79.
- a plurality of communication holes 8 ⁇ for communicating the exhaust valve chamber 50 and the air chamber 32 with the exhaust valve rod holder 79 are provided on the same circle around the valve rod guide hole 79 a. ing .
- a spring 81 passed through the exhaust valve rod 53 is interposed between the exhaust valve body 51 and the exhaust valve rod holder 79, and the exhaust valve is always kept at the spring 81.
- the body 51 is urged to be in a closed position in which the body 51 closely contacts the valve seat 50a of the exhaust valve chamber 50.
- the exhaust valve body 51 comes into air-tight contact with the valve seat 50a via the O-ring 82. As shown in FIG.
- the O-ring 82 is fitted in an arc-shaped groove 83 formed in a corner of the front end face of the exhaust valve body 51 so as to be mounted so as not to come off.
- the exhaust valve body 51 closes the exhaust port 40 and the rear end flange 53 a of the exhaust valve rod 53 is threaded.
- a predetermined stroke is separated from the inner surface force of the closed end 84a of the groove 84.
- the supply / exhaust valve control panel 70 which is placed in contact with the center of the closed upper end 29b of the bellows 29, is formed in a disk shape, and the air supply valve rod is pressed against its front surface.
- a sleeve 84 constituting an exhaust valve stem pulling portion 86 is arranged and fixed to the air supply valve rod pressing portion 85.
- a guide hole portion 84a slightly larger than the outer diameter of the exhaust valve rod 53 and sliding with the valve rod 53 with little clearance.
- the rear end of the exhaust valve rod 53 with the flange 53a is slidably and non-removably inserted into the guide hole 84a.
- the exhaust valve rod 53 can be moved straight in the axial direction by being slidably guided by the guide hole 84a.
- the sleeve 84 can be formed integrally with the supply / exhaust valve control panel 70.
- a spring 87 made of a compression coil spring is interposed between the rear end face of the air supply valve rod 49 and the outer circumference of the exhaust valve rod 53, respectively.
- the air supply / exhaust valve control panel 70 is pressed and urged toward the center of the closed upper end 29 b of the bellows 29 by the springs 87, 87 of the bellows. ing.
- the case 37 is connected to one or more guide shafts 88 parallel to the direction in which the bellows 29 expands and contracts, and more preferably, a plurality of guide shafts 88.
- the guide shaft 88 has its front end fastened to the rear end face of the valve case 37 with a nut 89 via a washer 89a, and the rear end with a flange 88a is supplied and exhausted.
- a guide sleeve 90 buried and fixed to the front end face of the control panel 70 is inserted in a non-removable manner and slidably inserted in the axial direction.
- a guide hole 90a is formed at the front end of the guide sleeve 90 so as to slide with almost no gap with the guide shaft 88, and the guide hole 90a is provided with a guide hole in the guide hole 90a.
- the supply / exhaust valve control panel 70 is parallel to the direction of expansion and contraction of the bellows 29 under the guidance of the guide shaft 88. You can move straight to the point.
- the guide sleeve 90 can be formed integrally with the supply / exhaust valve control panel 70.
- the exhaust valve rod 53 connected to the valve is pulled in the same direction, and the exhaust valve body 51 is opened, so that the compressed air in the air chamber 32 is discharged into the atmosphere from the exhaust port 40.
- the filling pressure in the air chamber 32 decreases.
- the bellows 29 expands as the filling pressure in the air chamber 32 decreases.
- the supply / exhaust valve control panel 70 is pushed at the center of the closed upper end 29 b of the bellows 29, and the exhaust valve 51 is biased by the spring 81. Close exhaust port 40 with. This regulates the filling pressure in the air chamber 32. It is fixed to the adjusted state.
- the compressed air is sucked in and discharged until the pressure balances with the pressure. Irrespective of these fluctuations in the discharge pressure, the pulsation is efficiently absorbed, and the pulsation width can be suppressed to a small value.
- the air supply valve body 44 and the exhaust valve body 51 provided separately and independently in the valve case 37 are provided with a supply / exhaust valve control panel 70 0 according to the expansion and contraction of the bellows 29. Valve opening is controlled via the upper supply valve rod pressing section 85 and the exhaust valve rod pulling section 86.
- the bias load is not applied to the valve 29, and the bellows 29 always expands and contracts straight in the axis X — X direction of the valve case 37, and the supply and exhaust valve bodies 44, 51
- the responsiveness of the opening / closing operation of the motor can be improved, and pulsation reduction performance can be secured.
- the supply / exhaust valve body 44 can be always and stably and reliably moved in parallel by the guide action of the guide shaft 88, so that the supply / exhaust valve body 44, 51
- the opening / closing operation corresponding to the expansion and contraction of the bellows 29 is faithfully performed via the supply / exhaust valve control panel 70.
- the air chamber 32 is provided with an automatic pressure adjusting mechanism composed of an automatic air supply valve mechanism 41 and an automatic exhaust valve mechanism 42. Opening 3 for
- ADVANTAGE OF THE INVENTION According to the present invention, even when a liquid containing a precipitated substance such as slurry is used, precipitation or aggregation of the precipitated substance in a pump or an accumulator can be prevented well. .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Reciprocating Pumps (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Diaphragms And Bellows (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2001-7009051A KR100460971B1 (ko) | 1999-11-29 | 2000-11-20 | 벨로즈를 갖는 유체기기 |
EP00976354A EP1156217B1 (en) | 1999-11-29 | 2000-11-20 | Fluid device with bellows |
US09/868,938 US6945761B1 (en) | 1999-11-29 | 2000-11-20 | Fluid apparatus having downwardly inclined lower lamella portion of a bellows |
TW089124950A TW466303B (en) | 1999-11-29 | 2000-11-23 | Fluid device with bellows |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33756299A JP2001153053A (ja) | 1999-11-29 | 1999-11-29 | ベローズを有する流体機器 |
JP11-337562 | 1999-11-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001040651A1 true WO2001040651A1 (fr) | 2001-06-07 |
Family
ID=18309822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/008159 WO2001040651A1 (fr) | 1999-11-29 | 2000-11-20 | Dispositif d'ecoulement de fluide a soufflet |
Country Status (6)
Country | Link |
---|---|
US (1) | US6945761B1 (ja) |
EP (1) | EP1156217B1 (ja) |
JP (1) | JP2001153053A (ja) |
KR (1) | KR100460971B1 (ja) |
TW (1) | TW466303B (ja) |
WO (1) | WO2001040651A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007003723A1 (de) * | 2007-01-25 | 2008-07-31 | Elringklinger Ag | Strukturbauteil |
US20100178182A1 (en) * | 2009-01-09 | 2010-07-15 | Simmons Tom M | Helical bellows, pump including same and method of bellows fabrication |
US8636484B2 (en) * | 2009-01-09 | 2014-01-28 | Tom M. Simmons | Bellows plungers having one or more helically extending features, pumps including such bellows plungers, and related methods |
KR101856578B1 (ko) | 2014-08-08 | 2018-05-10 | 니폰 필라고교 가부시키가이샤 | 벨로즈 펌프 장치 |
EP3578820A1 (en) * | 2017-02-03 | 2019-12-11 | Eagle Industry Co., Ltd. | Liquid supply system |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07279851A (ja) * | 1994-04-01 | 1995-10-27 | Nippon Pillar Packing Co Ltd | ベローズ式定量ポンプ |
JPH08159016A (ja) * | 1994-12-12 | 1996-06-18 | Nippon Pillar Packing Co Ltd | ポンプの脈動幅抑制装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2021156A (en) * | 1933-11-10 | 1935-11-19 | Smith William Neil | Pump |
FR816224A (fr) * | 1936-01-11 | 1937-08-03 | Membranes en forme de soufflets et organes comportant de telles membranes, notamment pour presses et pompes à longue course et à haute pression ou appareils du même genre | |
US3394631A (en) * | 1965-10-23 | 1968-07-30 | Tom H. Thompson | Bellows mechanism |
US4231724A (en) * | 1978-03-09 | 1980-11-04 | Hope Henry F | Adjustable metering pump |
JPS58170866A (ja) * | 1982-03-02 | 1983-10-07 | Seven Ribaa:Kk | ベロ−ズポンプ |
DE3326250A1 (de) * | 1983-07-21 | 1985-01-31 | Lang Apparatebau GmbH, 8227 Siegsdorf | Faltenbalgpumpe |
JPS61262531A (ja) * | 1985-05-14 | 1986-11-20 | Daikin Ind Ltd | 空気調和機のドレン装置 |
US4984970A (en) * | 1986-10-22 | 1991-01-15 | Karl Eickmann | Arrangements on coned rings which are applicable in high pressure pumps and related devices |
JPH03179184A (ja) | 1989-12-05 | 1991-08-05 | Nippon Pillar Packing Co Ltd | 往復動ポンプ |
JPH05302573A (ja) * | 1992-04-27 | 1993-11-16 | Hideo Nagamitsu | ベローズ式圧縮装置 |
JPH0617752A (ja) | 1992-07-01 | 1994-01-25 | Iwaki:Kk | 脈動減少装置 |
FR2772436B1 (fr) * | 1997-12-16 | 2000-01-21 | Centre Nat Etd Spatiales | Pompe a deplacement positif |
US6095194A (en) * | 1998-03-20 | 2000-08-01 | Nippon Pillar Packaging Co., Ltd. | Pulsation suppression device for a pump |
-
1999
- 1999-11-29 JP JP33756299A patent/JP2001153053A/ja active Pending
-
2000
- 2000-11-20 EP EP00976354A patent/EP1156217B1/en not_active Expired - Lifetime
- 2000-11-20 WO PCT/JP2000/008159 patent/WO2001040651A1/ja active IP Right Grant
- 2000-11-20 US US09/868,938 patent/US6945761B1/en not_active Expired - Lifetime
- 2000-11-20 KR KR10-2001-7009051A patent/KR100460971B1/ko active IP Right Grant
- 2000-11-23 TW TW089124950A patent/TW466303B/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07279851A (ja) * | 1994-04-01 | 1995-10-27 | Nippon Pillar Packing Co Ltd | ベローズ式定量ポンプ |
JPH08159016A (ja) * | 1994-12-12 | 1996-06-18 | Nippon Pillar Packing Co Ltd | ポンプの脈動幅抑制装置 |
Also Published As
Publication number | Publication date |
---|---|
TW466303B (en) | 2001-12-01 |
JP2001153053A (ja) | 2001-06-05 |
EP1156217B1 (en) | 2012-07-04 |
EP1156217A1 (en) | 2001-11-21 |
KR100460971B1 (ko) | 2004-12-09 |
EP1156217A4 (en) | 2010-07-28 |
KR20010101581A (ko) | 2001-11-14 |
US6945761B1 (en) | 2005-09-20 |
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