JP5193316B2 - Aspirator valve device - Google Patents

Description

  The present invention relates to an aspirator valve device having both an aspirator function and a valve function.

  Conventionally, in chemical and biological experiments, an aspirator is used to easily obtain a reduced pressure state. This aspirator is mainly used in the following two configurations.

  First, the liquid flows through a straight tapered tube, and is blown out from the tip portion into the nozzle port of the gas phase reservoir so as to allow gas to be mixed into the liquid. A check valve for preventing the backflow of liquid is provided on the gas suction side.

  Second, a configuration in which a liquid flows through a straight pipe and gas is entrained from a hollow pipe communicating with the outside (outside air) attached in a direction perpendicular to the pipe, so that the gas can be mixed with the liquid. It is. Also in this case, a check valve for preventing the back flow of the liquid is provided on the gas suction side.

  In addition, an aspirator used for fuel recovery, in-house temperature detection, and the like is also known (see Patent Documents 1 and 2).

JP 2009-156093 A JP 2004-322721 A

  However, in the prior art, an aspirator having a valve function has not been proposed. In addition, a conventional aspirator usually has a straight liquid flow path. However, depending on the use situation, it may be suitable that the liquid flow path bends vertically at the inlet and the outlet.

  The present invention has been made in view of the circumstances as described above, and has as its object to provide an aspirator valve device that has a valve function and an aspirator function in a compact and simple configuration, and also has good operability during work. Yes.

  The aspirator valve device of the present invention includes a valve main body and a valve body member, and the valve main body includes an inflow side flow channel communicating with the liquid inflow port and an outflow side flow channel communicating with the liquid outflow port. The outflow side flow path is perpendicular to the inflow side flow path, and an opening communicating with the inflow side flow path is provided at the end opposite to the liquid outflow port. A tapered pipe line that expands toward the liquid outlet is provided, and the valve body member includes a needle-like hollow tube whose outer peripheral surface in the vicinity of the tip portion constitutes the valve body, and a liquid is placed in the middle of the hollow tube. A check valve is provided to prevent backflow, and is provided so as to be able to advance and retract by screwing with the valve body along the flow path direction of the outflow side channel from the opposite side of the liquid outflow port to the opening of the outflow side flow path. And the valve body against the valve seat around the opening so that the opening can be opened and closed. It is configured to be separable, and in a state where a nozzle portion is formed by a gap formed by separating the valve body of the valve body member and the valve seat of the valve body, a high flow velocity that flows from the liquid inlet and passes through the nozzle portion A gas from outside is entrained in the liquid through the inside of the hollow pipe of the valve body member, the gas is passed from the outside through the taper pipe line of the outflow side flow path, and the liquid mixed with this gas is discharged from the liquid outlet. Is sucked from a hollow tube.

  According to the aspirator valve device of the present invention, the valve function and the aspirator function are provided in a compact and simple configuration, and the operability during work is also good. Further, since the liquid flow path is bent vertically at the inlet side and the outlet side, it can be used in a mode different from a conventional aspirator in which the flow path is straight from the inlet side to the outlet side.

It is sectional drawing which shows embodiment of the aspirator valve apparatus of this invention. It is a front view of the aspirator valve device of FIG. It is a top view of the aspirator valve device of FIG. It is a bottom view of the aspirator valve device of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. The aspirator valve device 1 according to this embodiment shown in FIGS. 1 to 4 is a device having both an aspirator function capable of entraining a gas in a liquid flow and a valve function capable of stopping the liquid flow. .

  As shown in FIG. 1, the aspirator valve device 1 includes a valve body 2 having a liquid flow path therein and a needle-like valve body member 40.

  The valve body 2 includes a metal housing 3 and a fixing member 4, respectively. The housing 3 has an inflow side channel 11 communicating with the liquid inflow port 10 and an outflow side channel 21 communicating with the liquid outflow port 20 provided therein.

  The outflow side channel 21 has a channel direction perpendicular to the inflow side channel 11, and these form an inverted L-shaped channel. As described above, the aspirator valve device 1 according to the present embodiment is configured so that the inflow direction of the liquid and the outflow direction of the liquid are perpendicular to each other, unlike a conventional aspirator, in which the gas is entrained.

  The outflow side channel 21 is provided with an opening 22 communicating with the inflow side channel 11 at the end opposite to the liquid outlet 20. Further, a tapered pipe line 26 that expands in a conical shape from the opening 22 toward the liquid outlet 20 is provided. The tapered pipe line 26 operates in the same manner as a so-called Venturi pipe when used as an aspirator.

  The valve body member 40 includes a needle-like hollow tube 41, and an outer peripheral surface in the vicinity of the distal end portion of the hollow tube 41 constitutes a valve body 45. The hollow tube 41 penetrates from the upper end portion 42 to the lower end portion 43 so that an external gas introduced from the upper end portion 42 is entrained in the liquid flow from the lower end portion 43.

  A check valve 50 is provided in the middle of the hollow tube 41 to prevent the liquid from flowing backward. As the check valve 50, for example, one having the same configuration as a conventional aspirator can be used. In this embodiment, the check valve 50 includes a movable member 51 and receiving members 52 and 53 made of a resin material. The movable member 51 is normally seated on the lower receiving member 53 so that gas from the outside can be introduced through a gap between the movable member 51 and the receiving member 53. When the liquid flows backward from the lower end portion 43, the movable member 51 moves upward by the liquid flow and comes into contact with the receiving member 52. As a result, the hollow tube 41 is closed, and the liquid can be prevented from flowing out from the upper end portion 42.

  The valve body member 40 is provided so as to be able to advance and retreat with respect to the opening 22 of the outflow side flow channel 21 by screwing with the valve body 2 along the flow direction of the outflow side flow channel 21 from the opposite side of the liquid outflow port 20. It has been. That is, the valve body member 40 is screwed with the screwing portion 31 of the fixing member 4 of the valve body 2 by the screwing portion 44 provided on the outer peripheral portion of the hollow tube 41. And between these, it seals with the packing member 70 provided in the middle of the screwing part 31 of the fixing member 4, and the leakage of the liquid is prevented.

  The fixing member 4 is screwed and fixed to the screwing portion 13 of the housing 3 by the screwing portion 30, and a gap between them is sealed by a packing member 71 to prevent liquid leakage.

  Further, the valve body member 40 is provided with a handle portion 47 on the upper side of the hollow tube 41, and the operator can perform fine gas suction by an aspirator function by advancing and retreating the valve body member 40 by hand gripping and rotating operation. The liquid flow can be easily stopped by adjustment or valve function.

  And the valve body member 40 is comprised so that the valve body 45 can contact / separate with respect to the valve seat 23 around the opening part 22 so that the opening part 22 can be opened and closed. When used as an aspirator, a nozzle portion 60 is provided with a gap formed by separating the valve body 45 of the valve body member 40 and the valve seat 23 of the valve body 2.

  In the present embodiment, the valve body member 40 is continuously formed with a tapered surface 45 having a certain angle with respect to the horizontal plane and a tapered surface 46 having a larger angle on the outer peripheral surface near the tip. ing. The tapered surface 45 constitutes a valve body 45 for the valve seat 23 of the valve body 2. The opening 22 of the valve body 2 is formed with a conical taper surface 24 whose diameter is reduced in the opposite direction to the taper conduit 26, and the tapered surface 46 of the valve body member 40 is formed on the opening 22 of the valve body 2. An annular gap having a very small width is formed between the tapered surface 24 and the nozzle portion 60 can be formed by the gap. The width of the nozzle portion 60 can be adjusted by moving the valve body member 40 back and forth.

  Thus, the valve body member 40 is configured to be able to contact and separate from the valve seat 23 around the opening 22 by the valve body 45. When the valve body member 40 and the valve seat 23 are slightly separated from each other, the nozzle portion 60 is formed. The valve body member 40 can finally close the opening 22 by screwing and can act as a gate. That is, when the valve body member 40 closes the nozzle part 60, the flow of the liquid stops and plays the role of a valve.

  In this embodiment, the length of the valve body 2 is about 80 mm, the diameter of the liquid inlet 11 and the liquid outlet 21 is about 25 mm, the outer diameter around the outflow side channel 21 of the housing 3 is about 40 mm, and the tapered pipe line The maximum diameter of 26 is 32 mm, the length of the tapered pipe 26 in the flow path direction is about 25 mm, the minimum diameter of the tapered surface 24 of the opening 22 is 8 mm, and the maximum diameter is 10 mm.

  Next, the aspirator function by the aspirator valve device 1 of the present embodiment having the above configuration will be described.

  When the aspirator valve device 1 is used, it can be connected to a pipe by, for example, screwing portions 12 and 25 provided at the liquid inlet 11 and the liquid inlet 21. A liquid such as tap water is introduced from the liquid inlet 11 through such a pipe.

  If necessary, the valve body member 40 is moved forward and backward by the handle portion 47 so that the nozzle portion 60 is provided between the valve body 45 of the valve body member 40 and the valve seat 23 of the valve body 2, and then flows from the liquid inlet 11. Then, a gas such as air is entrapped from the outside through the inside of the hollow tube 41 of the valve body member 40 through the high flow velocity liquid that has passed through the nozzle portion 60, and is allowed to pass through the tapered pipe line 26 of the outflow side channel 21. The mixed liquid is discharged from the liquid outlet 20.

  When the valve body 45 approaches the nozzle portion 60 and the gap between the nozzle portions 60 becomes small, the flow rate of the liquid increases and is rapidly discharged into the tapered pipe line 26. At this time, as the flow velocity of the liquid passing through the nozzle portion 60 is larger, more gas can be drawn from the upper end portion 42 of the hollow tube 41 communicating with the outside (outside air), and mixing of the gas into the liquid can be performed. to enable.

  The amount (incorporation) of the gas into the liquid is determined depending on the size of the gap of the nozzle part 60, the flow rate of the liquid passing through the nozzle part 60, the inner diameter of the hollow tube 41, and the like.

  As described above, according to the aspirator valve device of the present invention, the valve function and the aspirator function are provided in a compact and simple configuration, and operability such as fine adjustment by the valve body member 40 at the time of work is good. For example, when used as an aspirator, the amount of gas suction can be finely adjusted by the operation of the handle portion 47, and the liquid flow can be shut off immediately. Further, since the liquid flow path is bent vertically at the inlet side and the outlet side, it can be used in a mode different from a conventional aspirator in which the flow path is straight from the inlet side to the outlet side.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, A various change is possible in the range which does not deviate from the summary. For example, the shape of the inflow side flow path 11 does not necessarily have to be a symmetrical flow tube shape, and may be various shapes.

DESCRIPTION OF SYMBOLS 1 Aspirator valve apparatus 2 Valve body 3 Housing | casing 4 Fixing member 10 Liquid inflow port 11 Inflow side flow path 12 Screwing part 13 Screwing part 20 Liquid outflow port 21 Outflow side flow path 22 Opening part 23 Valve seat 24 Tapered surface 25 Screwing Part 26 taper pipe line 30 screwing part 31 screwing part 40 valve body member 41 hollow tube 42 upper end part 43 lower end part 44 screwing part 45 valve body (taper surface)
46 Tapered surface 47 Handle part 50 Check valve 51 Movable member 52 Receiving member 53 Receiving member 60 Nozzle part 70 Packing member 71 Packing member

Claims (1)

A valve body and a valve body member;
The valve body is provided with an inflow side channel communicating with the liquid inlet and an outflow side channel communicating with the liquid outlet,
The outflow side flow path is perpendicular to the inflow side flow path, and an opening communicating with the inflow side flow path is provided at the end opposite to the liquid outflow port. A tapered pipe line that expands toward the liquid outlet is provided,
The valve body member includes a needle-shaped hollow tube whose outer peripheral surface in the vicinity of the tip portion constitutes a valve body, and a check valve for preventing a back flow of liquid is provided in the middle of the hollow tube. A valve seat around the opening is provided so as to be able to advance and retract by screwing with the valve body along the flow direction of the outflow side passage from the opposite side of the liquid outlet to the opening. Is configured to be able to contact and separate
In a state in which a nozzle portion is formed by a gap formed by separating the valve body of the valve body member and the valve seat of the valve body, the valve body member is introduced into the high flow rate liquid that has flowed from the liquid inlet and passed through the nozzle portion. Gas is drawn in from the outside through the inside of the hollow tube, passed through the taper pipe of the outflow channel, and the liquid mixed with this gas is discharged from the liquid outlet to suck the gas from the outside from the hollow tube An aspirator valve device characterized by being configured to do so.

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