JP6291616B1 - Flow standard meter - Google Patents

Abstract

[PROBLEMS] To provide a compact, non-intrusive medical care, and that there is no risk of damage due to contact, and whether a gas fluid is circulated over a wide range from 0.25 L / min to 15 L / min. It is an object of the present invention to provide a flow rate standard meter that can detect such a sharpness. The flow rate standard meter according to the present invention is a standard meter for visually confirming the flow of fluid, and has a plurality of different inner diameters that increase in steps from one end to the other. It is a flow rate standard meter provided with the indicator which has a cylindrical transparent standard pipe | tube and the spherical float arrange | positioned inside the standard pipe | tube. [Selection] Figure 3

Description

  The present invention is attached to a medical gas supply port provided on a wall surface of a hospital room, and is a gas fluid flow guide for a medical gas supply facility that supplies a predetermined flow rate of gas to a patient via a medical device such as a humidifier. It is about.

  In medical sites such as hospitals, gases such as oxygen and air are used as medical gases and are supplied to patients by medical gas supply equipment.

For example, in Patent Document 1, medical gas is supplied from a gas supply source to a gas outlet provided on the wall of each patient room via a gas pipe, and a gas flow meter and a gas flow rate controller are provided from the gas outlet in the patient room. There is disclosed a medical gas supply facility that is supplied to an inhalation mask through a vacuum vessel, a humidifier, and a gas supply pipe, and that allows a viewer to inhale medical gas from the inhalation mask. However, since the gas flowmeter protrudes upward from the gas outlet, there was a problem that the medical staff contacted the gas flowmeter, which hindered medical practice and damaged the gas flowmeter. .

  On the other hand, Patent Document 2 discloses a gas flow controller for a medical gas supply facility that is integrated with a gas flow guide meter that is compact and does not interfere with medical practice, and that is not damaged by contact. Has been. However, since the gas flow rate controller and the gas fluid flow standard meter are integrated, replace only the flow standard meter that has been a problem of conventional medical practice and could be damaged by contact. Cannot be installed on existing gas flow regulators. For this reason, it is necessary to replace the gas flow rate regulator as well, and there is a waste that the existing gas flow rate regulator cannot be used.

  On the other hand, in Patent Document 3, the taper angle of the inner surface of the pipe through which the gas fluid of the gas indicator, which is attached below the gas flow controller provided at the gas outlet, flows is 10.88 degrees, There has been disclosed a gas indicator (flow rate indicator) that is smaller than the conventional one by shortening the length of the tube by increasing the taper angle of the inner surface of the tube to 0.25 degrees. However, although the supply amount of medical gas is over a wide range from 0.25 L / min to 15 L / min by the gas flow rate controller, depending on the application and the condition of the patient, the gas indicator Has a problem that the gas flow rate can only correspond to a flow rate of 1 L / min or more, and if it is less than 1 L / min, it cannot be sensed sensitively whether or not the gas fluid is circulating.

JP-A-10-82671 Model 3206279 JP 2007-46970

  The present invention is compact so as not to interfere with medical practice, is free from damage due to contact, and is a gas fluid flowing over a wide range of gas supply from 0.25 L / min to 15 L / min? It is an object of the present invention to provide a flow rate standard meter that can detect whether or not there is no problem.

The flow rate standard meter according to the present invention is a standard meter that can visually check the flow of fluid,
A cylindrical transparent guide tube having a plurality of different inner diameters that gradually increase from one end toward the other end,
It is a flow rate standard meter provided with the indicator which has the spherical float arrange | positioned inside the standard pipe | tube.

  With the flow rate standard meter according to the present invention, whether or not the gas fluid is circulated over a wide range from 0.25 L / min to 15 L / min even if the length of the standard tube is shortened. Can be detected sharply, and it is compact without interfering with medical practice, and there is no risk of damage due to contact.

  The flow rate standard meter according to the present invention is a flow standard meter further provided with an indicator cover with a built-in indicator.

  With this flow standard meter, there is no risk of damage due to contact.

In the indicator cover of the flow rate standard meter according to the present invention,
A flare that is detachably attached to the supply port of the supply means for supplying fluid to the upper portion of the indicator cover, and a discharge portion that detachably attaches the fluid supply means to the lower portion of the indicator cover;
It is a flow rate reference meter having a fluid path connected to one end of a reference pipe from an inlet provided in the flare and connected to an outlet provided in the nozzle from the other end of the reference pipe.

  If it is a flow rate standard meter concerning the present invention, an indicator and piping are built in an indicator cover, and it is compact.

The indicator according to the present invention is:
It is a flow rate indicator disposed inside the opening that opens on the front side of the indicator cover.

  If the indicator is arranged on the front side surface of the cover, it can be visually confirmed that the gas is flowing without covering the indicator by hand when setting the gas flow rate.

  The opening part of the gas flow rate regulator which concerns on this invention is a gas flow rate standard meter further opened on the both sides | surfaces of an indicator cover.

  According to the present invention, the indicator can be visually recognized from three directions.

  The flow rate meter according to the present invention is compact so as not to interfere with medical practice, there is no risk of damage due to contact, and the gas supply amount ranges from 0.25 L / min to 15 L / min. It is possible to detect sensitively whether or not a gas fluid is circulating.

FIG. 1 is an external view showing a configuration of a medical gas supply facility according to the present embodiment. FIG. 2 is an external view of the flow rate standard meter according to the present embodiment. FIG. 3 is a cross-sectional view of the flow rate standard meter according to the present embodiment. FIG. 4 is a schematic cross-sectional view of a guide tube showing the movement of the float of the flow guide meter according to the present embodiment.

  Hereinafter, an embodiment of the present invention will be described.

  In FIG. 1, the structure of the medical gas supply equipment 1 which concerns on this embodiment is shown. The medical gas supply facility 1 includes a gas supply source (not shown), an oxygen supply box 3, a gas flow rate adjuster 6, a flow rate guide meter 10, and a humidifier (not shown). In addition, although oxygen gas is shown as an example of medical gas, not only this but gas, such as air, may be sufficient.

  A gas supply source (not shown) is provided outside the hospital room and supplies oxygen gas to an oxygen supply box 3 described later.

  The oxygen supply box 3 is attached to a wall surface 2 such as a hospital room, and oxygen is supplied from an oxygen supply source via a gas pipe 4. The oxygen supply box 3 is provided with a gas pipe 4 at the top and a gas outlet 5 at the front. An inlet plug (not shown) of the gas flow controller 6 is inserted into the gas outlet 5, and the gas flow controller 6 is attached to the oxygen supply box 3.

  The gas flow controller 6 is a dial type gas flow controller and adjusts the flow rate of oxygen gas. Oxygen gas supplied to the gas flow rate regulator 6 via an inlet plug (not shown) is adjusted to an arbitrary flow rate by manually rotating the dial 7 and flows out from the connection port 8. The flow rate of oxygen gas is selected from any of the preset flow rates of 0, 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 10, 15 L / min. can do. In addition, the set value of the flow rate is arbitrary and may be a flow rate other than these.

  In FIG. 2, the external appearance of the flow rate standard meter 10 is shown. (1) of FIG. 2 is a left side view, and (2) is a front view. FIG. 3 shows a cross-sectional view of the reference meter 10 taken along the line AA.

  A flow rate standard meter (also simply referred to as a standard meter) 10 includes an indicator cover 11, a flare 12, a flare nut 13, and an indicator 21. The flow rate indicator 10 is connected to the gas flow rate regulator 6 via a flare 12 disposed at the top of the indicator cover 11, and is fixed to the connection port 8 of the gas flow rate regulator 6 by a flare nut 13.

  The indicator cover 11 is a housing that incorporates the indicator 21 and the joint filter 25, and is provided with a flow path through which oxygen gas flows. The flow path includes an inflow passage 33 that is connected to a connection chamber 35 that is connected to a lower end portion of the guide pipe 22 from an inlet that penetrates the flare 12, and an upper end portion of the guide pipe 22, and a lower portion of the indicator cover 21. It comprises an outflow passage 36 connected to an outlet 37 provided in the protruding nozzle 14.

  The indicator 21 is an area-type floating gas flow rate indicator, is located in front of the indicator cover 11 (on the side opposite to the wall surface 2), and includes a guide pipe 22, a joint filter 25, and a float 23. The reference tube 22 is made of a transparent cylindrical resin tube. The inner diameters of the lower portion 41, the central portion 42, and the upper portion 43 of the reference tube 22 are different from each other and increase in order. The guide tube 22 has a spherical float 23 enclosed therein, and the diameter of the float 23 is larger than the inner diameter of the lower portion 41 and smaller than the inner diameter of the central portion 42. Note that the shape of the float 23 is not limited to a spherical shape, and may be floating according to the amount of fluid flowing through the reference tube 22. The shape of the float 23 is not limited to a spherical shape, and may be, for example, a conical shape having a downward apex.

The boundary between the lower part 41 and the central part 42 of the guide tube 22 and the boundary between the central part 42 and the upper part 43 are stepped because the inner diameters of the lower part 41, the central part 42 and the upper part 43 are different. Since the float 22 moves up and down depending on the flow rate of oxygen gas and is repeatedly struck, the corner is curved with a corner dropped to prevent breakage. This is to prevent the corner from being broken and being supplied to the patient together with oxygen gas. The size of the inner diameter of the guide tube 22 is not limited to three types, and may be arbitrarily selected according to the range of the flow rate of oxygen gas as long as it is two or more types.

  The oxygen gas whose flow rate is adjusted by the flow rate regulator 6 is supplied to the inflow path 33 from the inlet 32 penetrating the flare 12, and the joint filter 25 disposed in the connection chamber 35 that connects the inflow path 33 to the guide pipe 22. From the lower end of the guide tube 22 to the guide tube 22. The joint filter 25 removes foreign substances in the oxygen gas flowing into the reference pipe 21 and prevents foreign substances from entering so that the reference pipe 22 operates normally. On the other hand, the oxygen gas that has flowed into the guide pipe 22 pushes up the enclosed float 23, and the float 23 stops at a position where the pushing force and the weight of the float 23 are balanced, and at the position where the float 23 stops, It can be visually confirmed whether it is flowing. Further, oxygen gas flows out from the upper end of the guide pipe 22 to the outflow path 36.

  The gas flow rate indicator 30 is not limited to the area-type floating type, and any indicator that can visually confirm that the gas is flowing may be used. Further, since the gas flow rate set by the flow rate regulator 6 is flowing, it is only necessary that the indicator 21 can confirm that oxygen gas is flowing. Therefore, it is not necessary to measure the gas flow rate with the indicator 21, and when a gas flow rate of a certain amount or more is flowing, the float 23 is provided on the stopper 24 provided to protrude from the upper end of the reference tube 22 into the reference tube 22. It may be abutted and stopped, the length of the guide tube 22 can be shortened, and the flow guide meter 10 can be made compact.

  FIG. 4 is a schematic cross-sectional view of the guide tube 22 showing the movement of the float 23. When oxygen gas is not flowing through the guide tube 23, the float 23 is in contact with the boundary portion between the lower portion 41 and the center portion 42 of the guide tube 22 at the position shown as the float 23b. If the float 23 is in contact with the joint filter 25 disposed in the connection chamber 35 connected to the reference pipe 22, the float 23 blocks part of the joint filter 25 and interferes with the inflow amount of oxygen gas. As long as the length of the lower part 41, the length which the float 23 does not contact | abut to the joint filter 25 should just be ensured. On the other hand, when the oxygen gas flows, the float 23 floats as shown as the float 23a. The inner diameter of the central portion 42 of the guide tube 22 is such that the float is pushed up and the oxygen gas is surely flowing even if the flow rate of the oxygen gas is as small as 0.25 L / min. Is selected. On the other hand, the inner diameter of the upper portion 43 is selected so that a large amount of oxygen gas can flow. In addition, what is necessary is just to select the internal diameter of each of the lower part 41 of the standard pipe | tube 22, the center part 42, and the upper part 43 according to the flow volume of oxygen gas.

  On the other hand, the portion of the indicator cover 11 where the guide tube 22 is located has an opening 15 so that the guide tube 22 built in the indicator cover 11 can be seen. The opening 15 is preferably open so that the reference tube 22 can be viewed from the three directions of the front and both sides, since the visibility of the float 23 floating in the reference tube 22 is improved.

  The oxygen gas flowing out from the guide pipe 22 is supplied to a supply means (not shown) connected to the nozzle 14 from an outlet 37 that passes through the nozzle 14 via an outlet path 36. The supply means includes a humidifier 6 (not shown), a gas supply hose (not shown), and an oxygen mask (not shown).

  The oxygen gas supplied from the oxygen supply box 3 is adjusted to a predetermined gas flow rate by the gas flow rate controller 6, and then attached via the flow rate guide 10 and the nozzle 14 of the flow rate guide 10. Supplied to the humidifier 6. The oxygen gas supplied to the humidifier 6 is humidified in the humidifier 6 and then supplied to an oxygen mask (not shown) via a gas supply hose (not shown) and is exhaled by the patient.

  The flow rate meter according to the present invention is compact so as not to interfere with medical practice, there is no risk of damage due to contact, and the gas supply amount ranges from 0.25 L / min to 15 L / min. It is possible to detect sensitively whether or not a gas fluid is circulating.

DESCRIPTION OF SYMBOLS 1 ... Medical gas supply equipment 2 ... Wall surface 3 ... Oxygen supply box 4 ... Gas piping 5 ... Gas outlet 6 ... Gas flow controller 7 ... Dial 8 ... Connection port 10 ... Flow rate indicator 11 ... Indicator cover 12 ... Flare 13 ... flare nut 14 ... nozzle 15 ... opening 21 ... indicator 22 ... guide pipe 23 ... float 24 ... stopper 25 ... joint filter 32 ... inlet 33 ... inlet channel 35 ... connection chamber 36 ... outlet channel 37 ... outlet 41 ... lower 42 ... central part 43 ... upper part

Claims (5)

It is a flow rate standard meter that can visually check the flow of fluid,
A cylindrical transparent guide pipe having a plurality of different inner diameters that gradually increase from one end to the other end, and a float disposed inside the guide pipe ,
The guide tube has a lower portion having an inner diameter smaller than the diameter of the float;
The lower portion has a length where the float does not contact a joint filter disposed in a connection chamber provided to be connected to the lower end of the guide pipe and removes foreign matters in the fluid, and the upper end of the guide pipe is provided at the upper end of the lower portion. perpendicular boundary surface in the direction of elongation, flow indication meter that have a and curved corners between the lower inner surface and boundary surface.   The flow rate standard meter according to claim 1, further comprising an indicator cover containing the indicator. The indicator cover is
A flare that is detachably attached to a supply port of a supply means for supplying fluid is disposed on the upper portion of the indicator cover,
A nozzle for detachably attaching a fluid supply means to the lower part, and an outlet through which the nozzle penetrates from the other end of the guide pipe, connected to the one end of the guide pipe from an inlet through the flare The flow rate standard meter according to claim 2, further comprising a fluid path connected to the flow path.   The flow indicator according to claim 2 or 3, wherein the indicator is disposed inside an opening portion opened on a front side surface of the indicator cover.   The flow rate meter according to claim 4, wherein the opening is further opened on both side surfaces of the indicator cover.

Images