JP2012090964A - Carbonated spring generator using two-shaft positive displacement rotary pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a "carbonated spring generator using a two-shaft positive displacement rotary pump" with a simple structure, by which a carbonated spring can stably and easily be obtained.SOLUTION: In the carbonated spring generator including a water tank for storing the carbonated spring, a pump unit for sending hot water through a circulating path to the water tank, and a carbon dioxide gas cylinder, the pump unit P comprises a roots pump 3 in which a pair of root rotors 26 stored in a pump casing 4 with a suction port and a discharge port are rotary-driven by a driving motor, and a carbon dioxide introducing tube 51 which leads carbon dioxide supplied from the carbon dioxide gas cylinder 61 to the suction port side. The hot water is sucked in from the water tank 70 by operation of the roots pump 3 while bubbles of the carbon dioxide taken in from the carbon dioxide introducing tube 51 is made fine by compression action of the pump 3, and the hot water containing the fine bubbles of the carbon dioxide is discharged into the water tank 70.

Description

  The present invention relates to a “carbonated spring generating apparatus using a biaxial volumetric rotary pump” suitable for home use and business use, which can easily obtain carbonated springs for bathing, footbaths, and the like.

  A carbonated spring in which carbon dioxide gas (carbon dioxide gas) having a concentration of about 1000 ppm is dissolved in warm water is used for bathing, footbaths, and the like, as it is effective for recovery from fatigue and pain relief by promoting blood circulation.

  Patent Document 1 includes a dissolved water manufacturing unit that manufactures dissolved water in which carbon dioxide gas is dissolved, and a bubble generation nozzle that generates microbubbles of carbon dioxide gas from the dissolved water supplied from the dissolved water manufacturing unit. There is disclosed a carbonated spring generating apparatus provided with a switching means for switching supply of carbon dioxide gas and air to a connection path branched and connected to a suction path for connecting water production means.

  Further, in Patent Document 2, the other ends of the suction pipe and the discharge pipe each connected at one end in the water tank are connected so as to be circulated by the water pipe of the carbonated spring generating device, and the pump and the carbonic acid provided in the water pipe are connected. A gas cylinder is connected by a pipe line, and water pressurized to a predetermined pressure by dissolving the carbon dioxide gas by the operation of the pump is led to a discharge valve provided at the tip of the discharge pipe and injected from the valve into the water in the water tank Thus, a carbonated spring generating device is disclosed in which fine bubbles of carbon dioxide gas are dissolved in water.

  However, in the generating apparatus of Patent Document 1, foreign matter mixed in dissolved water adheres to the orifice provided in the bubble generating nozzle to reduce the generation of the bubble, or the small hole passage of the orifice is blocked to make the bubble. There is a risk of preventing the occurrence of. Also, in the generating device of Patent Document 2, since the suction passage and the discharge passage formed in the cylinder head of the pump are narrow, there arises a problem that foreign matter mixed in the water adheres to the passage and obstructs the flow of water. I think that the.

Since the apparatus of Patent Document 2 is pressurized to a high pressure of about 0.7 MPa by a piston pump or the like, the power is increased. Furthermore, both of the devices of Patent Documents 1 and 2 can obtain fine bubbles of carbon dioxide and reach the well-known therapeutic spring line (CO ₂ : 1000 mg / l) <see the graph in FIG. There is concern about being released to

Japanese Patent No. 4134233 JP 2009-11446 A

  An object of the present invention is to provide a “carbonated spring generating apparatus using a biaxial volumetric rotary pump” having a simple structure that can stably and easily obtain carbonated springs.

In order to achieve the above-mentioned object, the invention described in claim 1 is a carbonated spring generating apparatus comprising a water tank for storing carbonated spring, a pump unit for feeding hot water to the water tank via a circulation path, and a carbon dioxide gas cylinder.
The pump unit includes a biaxial positive displacement rotary pump in which a pair of rotors housed in a pump casing provided with a suction port and a discharge port are rotated by a drive motor, and carbon dioxide gas supplied from the carbon dioxide gas cylinder. It consists of a carbon dioxide gas introduction pipe that leads to the inlet side,
The operation of the biaxial volumetric rotary pump sucks hot water from the water tank and refines the bubbles of carbon dioxide taken in from the carbon dioxide introduction pipe by the compression action of the pump, and includes the refined carbon dioxide bubbles The produced hot water is discharged into the water tank.

  In order to achieve the same object, the invention described in claim 2 is a carbonated spring generator using the biaxial positive displacement rotary pump according to the first aspect, wherein the biaxial positive displacement rotary pump has a suction side of the housing. Provided on the inner surface are a plurality of shearing grooves extending radially about the shaft hole into which the rotor shaft is inserted, and contaminants mixed into the pump casing and flowing into the shearing groove are on the side of the rotor lobe. It is configured to be sheared by a shearing action between the edge and the corner edge of the shearing groove.

  Since dust, dust, and other contaminants mixed in the hot water are sheared by the shearing action of the rotor lobe side edge of the biaxial positive displacement rotary pump and the corner edge of the shearing groove and discharged together with the hot water. , It becomes difficult for foreign matter to adhere to the mechanical seal portion of the pump, and the pump operates stably.

  In order to achieve the same object, the invention described in claim 3 is a carbonated spring generator using the biaxial positive displacement rotary pump according to claim 1 or 2, wherein a flow rate adjustment valve is provided in the carbon dioxide gas introduction pipe. It is characterized by wearing.

  Since the flow rate of the carbon dioxide gas can be adjusted by the flow rate adjusting valve, it is easy to adjust the carbon dioxide gas supplied to the biaxial volumetric rotary pump.

(Invention of Claim 1)
According to the carbonated spring generating apparatus using the biaxial volumetric rotary pump, the hot water mixed with the carbon dioxide gas taken in from the carbon dioxide gas introduction pipe is refined by the compression action of the biaxial volumetric rotary pump, and the refined carbon dioxide gas is produced. The carbon dioxide can be efficiently dissolved in the hot water by discharging the hot water mixed with the bubbles toward the bottom of the water tank. Furthermore, since this apparatus can promote the refinement | miniaturization of the bubble in hot water by using a biaxial positive displacement rotary pump, it becomes a simple structure and can obtain a carbonated spring stably and easily. In addition, the pump has an excellent advantage that the operation of the pump is not hindered by foreign matters such as fluff and dust mixed in the hot water.

Carbonate spring generating apparatus using a biaxial positive displacement rotary pump according to the present invention Roots pump partially broken side view Roots pump partially broken front view Vertical front view of flow control valve Graph showing changes in carbon dioxide concentration

  The best mode of the present invention will be described below with reference to the drawings.

  A carbonated spring generating device (hereinafter simply referred to as “carbonated spring generating device”) A using a biaxial positive displacement rotary pump according to the present invention feeds hot water into a water tank 70 storing the carbonated spring and a circulation path 65 to the water tank 70. A pump unit P and a carbon dioxide gas cylinder 61 are provided.

  The pump unit P is a carbon dioxide gas supplied from a carbon dioxide gas cylinder 61 and a roots pump 3 as a biaxial volumetric rotary pump that is rotationally driven by a drive motor 38 on a gantry 1 installed adjacent to a water tank 70. And a carbon dioxide gas introduction pipe 51 for guiding the gas to the suction port side of the pump 3.

  As shown in FIG. 2, the Roots pump 3 has a rotor casing in which a suction port 8 is provided obliquely upward and a discharge port 9 is provided obliquely downward in a pump casing 4 provided with a suction port 5 and a discharge port 6. 7 is inclined at 45 degrees. The upper corner 7 a of the suction port 8 of the rotor casing 7 and the top 4 a on the suction port 5 side of the pump casing 4 are connected by a wall 10. Further, a concave arc wall 11 is integrally formed laterally from the lower corner portion 7b of the discharge port portion 9, and a substantially middle portion of the concave arc wall 11 and the bottom portion 4b of the pump casing 4 are connected by a vertical wall 12. Yes. Reference numeral 13 denotes a bypass hole provided in the vertical wall 12.

  14 and 14 are drain holes provided in the peripheral wall of the pump casing 4, and 15 is a water supply hole provided in the top portion 4 a of the pump casing 4. A cap 17 is screwed into one drain hole 14, and a cap 21 is screwed into the water supply hole 15. The cap 18 that is screwed into the other drain hole 14 is provided with a rod 19 that protrudes into the bypass hole 13 at the center.

A flange fitting 23 for piping is attached to the suction port 5 via a check valve 22. A flange fitting 25 is attached to the discharge port 6.

  The rotor casing 7 accommodates a pair of two-leaf root rotors 26. As shown in FIG. 3, the rotor shaft 27 of the Roots rotor 26 is provided so as to be freely supported by bearings 32, 32 attached to housings 30, 31 fixed to both sides of the pump casing 4. A pulley 34 is attached to one end of the lower rotor shaft 27 that protrudes from the housing 30, and the pulley 34 is rotatably driven by a drive motor device 38 via a transmission belt 39 (FIG. 1). A timing gear 35 is fixed to the other end of the rotor shaft 27, and the timing gears 35 are engaged with each other. Reference numeral 36 denotes a gear cover attached to the opening of the housing 31.

  The housings 30 and 31 are provided with a stuffing box 33 in which a well-known mechanical seal is accommodated behind a bearing 32 that supports the rotor shaft 27.

About the roots rotor 26, the outer side of the metal core part 26b formed except the rotor shaft | axis 27 is given the lining process with the polyurethane rubber material (or nitrile rubber material).

In the roots pump 3 of this embodiment, the two-leaf type root rotor 26 is adopted, but the present invention is not limited to this, and a multi-leaf type root rotor can also be applied.

A plurality of, for example, three shearing grooves 30b extending in the radial direction about the shaft hole 30a into which the rotor shaft 27 is inserted are provided at a position corresponding to the suction side of the inner surface of the housing 30. About the magnitude | size of the groove | channel 30b for shear, it shall be width: 5-15mm, length: 15-25mm, and depth: 5-10mm. Regarding the length of the shearing groove 30b, the first is from the inner end edge of the shaft hole 30a to the middle position of the inner diameter of the rotor casing 7, and the second is from the inner end edge of the shaft hole 30a to the rotor casing 7. The third is provided so as to be changed in accordance with the rotation direction of the roots rotor 26 from the vicinity of the inner end edge of the shaft hole 30a to a position slightly protruding from the inner diameter of the rotor casing 7 up to the position of 3/4 of the inner diameter. You can also.
The other housing 31 is also provided with the same shearing groove (not shown).

  Thus, dust, dust, and other contaminants that flow into the rotor casing 7 together with hot water and enter the shearing groove 30b are sheared by the side edges of the lobes 26a of the roots rotor 26 and the corner edges of the shearing grooves 30b. It is sheared by the action and discharged from the discharge port 6.

  One end 51 a of a carbon dioxide gas introduction pipe 51 is connected to a carbon dioxide gas inlet (not shown) provided in the upper part of the flange fitting 23. 52 is an on-off valve interposed in the carbon dioxide introduction pipe 51, and 53 is a flow rate adjusting valve interposed in the carbon dioxide introduction pipe 51. A pressure regulating valve 62 and a flow meter 63 are attached to the gas outlet side of the carbon dioxide gas cylinder 61. The other end 51 b of the carbon dioxide gas introduction pipe 51 is connected to the flow meter 63.

  As shown in FIG. 4, the flow rate adjusting valve 53 is provided with a flow path 55 in which an inlet portion 55 a and an outlet portion 55 b are formed in an inverted T-shaped valve main body 54, and a folded portion 55 c at a substantially intermediate position of the flow path 55. A screw hole 56 having a diameter about four times larger than that of the flow path 55 is formed so as to communicate with each other, and a conical tip portion 57a of the piece piece 57 screwed into the screw hole 56 is provided so as to face the folded portion 55c. ing. Reference numeral 58 denotes a cap screwed into the screw hole 56.

  Thus, the flow rate adjusting valve 53 capable of adjusting the flow rate of the carbon dioxide gas passing through the flow path 55 is configured by moving the piece piece 57 forward and backward to change the size of the gap generated in the folded portion 55c.

  For the circulation path 65, a series of hot water flows including a suction pipe 66 connected to the flange fitting 23 of the pump unit P, a discharge pipe 67 attached to the flange fitting 25 of the pump unit P, and a water tank 70. A passage.

  As described above, when the two-leaf type root rotor 26 of the roots pump 3 is rotated by the drive motor device 38, hot water is sucked from the suction port 5 and carbon dioxide bubbles taken in by the ejector action from the carbon dioxide introduction port are root pumps. The pump unit P is configured to discharge water from the discharge port 6 that is refined by the compression action of No. 3 and contains the refined bubbles.

  Then, the hot water in the water tank 70 is sucked into the suction pipe 66 by the operation of the pump unit P, and the bubbles of carbon dioxide gas taken in by the ejector action from the carbon dioxide gas inlet are refined by the compressing action of the roots pump 3 and refined. By discharging the hot water containing bubbles generated from the discharge pipe 67 toward the bottom of the water tank 70, the carbonated spring generating apparatus A according to the present invention that efficiently dissolves carbon dioxide gas in the hot water is configured.

(Experiment)
For carbonated spring producing apparatus A according to the present invention shown in FIG. 1, to measure the change in carbon dioxide (CO ₂₎ dissolved amount of the water by operating time. The results are shown in the graph of FIG.
(Experimental conditions)
Roots pump specifications Roots pump diameter: 50 mm
Discharge rate: 200 l / min Pump discharge pressure: 50 kPaG
Suction head: 2m
Rotational speed: 650rpm
Motor output: 1.5Kw
Carbon dioxide gas supply rate: Measurement in the case of 25 liters / minute and 5 liters / minute Water tank volume: 1.0 m ³
Water temperature: 20 ° C
(Measuring instrument)
CO ₂ gas dissolution amount measuring instrument: Toko Chemical Laboratory Ti-9004

As a result of the experiment, the amount of carbon dioxide (CO ₂ ) dissolved after the operation time of 60 minutes is about 1750 mg / liter when the carbon dioxide supply rate is 25 liters / minute, and when the carbon dioxide supply rate is 5 liters / minute. It was about 250 mg / liter, and it was confirmed that a large amount of carbon dioxide gas was dissolved in water. It was also confirmed that the amount of carbon dioxide released was small even if the supply of carbon dioxide was stopped and left for a long time. When the carbon dioxide supply rate is 25 liters / minute, it is possible to exceed the well-known therapeutic spring line (CO ₂ : 1000 mg / l), and when the carbon dioxide supply rate is 5 liters / minute, it is easy. A carbonated spring line (CO ₂ : 250 mg / l) can be obtained.

A ... Carbonated spring generating apparatus P using a biaxial positive displacement rotary pump according to the present invention P ... Pump unit 3 ... Roots pump (biaxial positive displacement rotary pump)
4 ... Pump casing 5 ... Suction port 6 ... Discharge port 26 ... Roots rotor (rotor)
26a ... Robe 27 ... Rotor shaft 30, 31 ... Housing 30b ... Shearing groove 51 ... Carbon dioxide introduction pipe 53 ... Flow rate adjusting valve 61 ... Carbon dioxide cylinder 65 ... Circulation path 70 ... Water tank

Claims (3)

In a carbonated spring generating apparatus equipped with a water tank for storing carbonated springs, a pump unit for feeding hot water to the water tank via a circulation path, and a carbon dioxide gas cylinder,
The pump unit includes a biaxial positive displacement rotary pump in which a pair of rotors housed in a pump casing provided with a suction port and a discharge port are rotated by a drive motor, and carbon dioxide gas supplied from the carbon dioxide gas cylinder. It consists of a carbon dioxide gas introduction pipe that leads to the inlet side,
The operation of the biaxial volumetric rotary pump sucks hot water from the water tank and refines the bubbles of carbon dioxide taken in from the carbon dioxide introduction pipe by the compression action of the pump, and includes the refined carbon dioxide bubbles A carbonated spring generating apparatus using a biaxial volumetric rotary pump, wherein the hot water is discharged into the water tank.   A plurality of shearing grooves extending radially about the shaft hole into which the rotor shaft is inserted are provided on the suction side inner surface of the housing of the biaxial volumetric rotary pump, and mixed into the pump casing for the shearing. 2. The biaxial volumetric rotation according to claim 1, wherein contaminants flowing into the groove are sheared by a shearing action by a side edge of the lobe lobe of the rotor and a corner edge of the shearing groove. A carbonated spring generator using a pump.   The carbonated spring generating apparatus using a biaxial volumetric rotary pump according to claim 1 or 2, wherein a flow rate adjusting valve is interposed in the carbon dioxide gas introduction pipe.

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