CN216206706U

CN216206706U - Electric display flowmeter

Info

Publication number: CN216206706U
Application number: CN202122625892.2U
Authority: CN
Inventors: 马金辉; 徐学利; 张凯
Original assignee: Hebei Yian Aomei Medical Equipment Co ltd
Current assignee: Hebei Yian Aomei Medical Equipment Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-05
Anticipated expiration: 2031-10-29

Abstract

The utility model relates to the technical field of medical detection, in particular to an electric display flowmeter. The method comprises the following steps: the flow sensor assembly is arranged on one side of the needle valve assembly, the outlets of the flow sensor assembly are connected to the air inlet integrated block together, the electronic display flowmeter is also provided with an oxygen-laughing ratio control integrated block, and the oxygen-laughing ratio control module comprises an oxygen inlet, an oxygen outlet, a laughing gas inlet and a laughing gas outlet; the needle valve assembly includes: the oxygen needle valve, the laughing gas needle valve and the air needle valve are arranged side by side; the flow sensor assembly includes: an oxygen flow sensor, a laughing gas flow sensor and an air flow sensor; the utility model adopts the scheme that the flow is adjusted by a precise needle valve, the high-precision thermal type mass sensor and the electric display digital tube display the measured flow, and the oxygen-to-smile ratio control integrated block is arranged, thereby effectively solving the defects of the prior art.

Description

Electric display flowmeter

Technical Field

The utility model relates to the technical field of medical detection, in particular to an electric display flowmeter.

Background

In the technical performance indexes of the medical anesthesia machine, the flow regulation sensitivity and the flow display precision are two crucial performance standards. It is directly related to the user experience of the product and the life safety of the patient. And the traditional flowmeter adopts a tubular metal rotor flowmeter. The detection method of the tubular metal rotameter is that the fluid to be detected flows in from the lower end of the conical tube, the flow of the fluid impacts the rotor and generates an acting force (the magnitude of the force changes with the magnitude of the flow) on the rotor; when the flow is large enough, the generated acting force supports the rotor and enables the rotor to be lifted, and meanwhile, the flow is obtained through the corresponding pipe wall scales. The metal rotor causes a large local resistance, which is a major factor affecting the flow rate adjustment sensitivity.

However, in the reading process of the tubular metal rotameter, the tubular metal rotameter is generally required to be on the same horizontal line with the pipe wall and the built-in metal rotor, and due to the individual difference of the height of a human body and the individual difference of the reading mode, the measurement precision is further greatly deviated on the premise of limited display precision. Therefore, how to sensitively adjust the gas flow and improve the flow display accuracy becomes a key ring for manufacturing the device.

The related products on the market are mainly tubular metal rotor flow meters. The tubular metal rotameter solution has the following disadvantages: 1. the linear interval is small, and the local resistance is large; 2. the reading cannot be accurately carried out, and the measurement accuracy is poor; 3. the glass product is fragile, and the individual difference is obvious; 4. the measuring range is small, and part of the measuring range needs double-tube series connection measurement; 5. the oxygen-smile ratio cannot be automatically controlled; 6. the needle valve has poor adjustment sensitivity and poor stability of the adjustment flow. Therefore, a flowmeter with high measurement accuracy is desired.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problems and provides an electric display flowmeter, and the utility model adopts a scheme that a precise needle valve is adopted to adjust the flow, a high-precision thermal type mass sensor and an electric display digital tube are adopted to display the measured flow, and an oxygen-to-laughing ratio control integrated block is arranged, thereby effectively solving the defects of the prior art.

To achieve the above object, the present invention provides an electrical display flowmeter comprising: the flow sensor assembly is arranged on one side of the needle valve assembly, the outlets of the flow sensor assembly are connected to the air inlet integrated block together, the electronic display flowmeter is also provided with an oxygen-laughing ratio control integrated block, and the oxygen-laughing ratio control module comprises an oxygen inlet, an oxygen outlet, a laughing gas inlet and a laughing gas outlet;

the needle valve assembly includes: the oxygen needle valve, the laughing gas needle valve and the air needle valve are arranged side by side;

the flow sensor assembly includes: an oxygen flow sensor, a laughing gas flow sensor and an air flow sensor; wherein the content of the first and second substances,

the outlet of the oxygen needle valve is connected with the oxygen inlet of the oxygen smile ratio control module, and the oxygen outlet of the oxygen needle valve is connected with the inlet of the oxygen flow sensor; the outlet of the laughing gas needle valve is connected with the laughing gas inlet of the oxygen-laughing ratio control module, and the laughing gas outlet of the laughing gas needle valve is connected with the inlet of the laughing gas flow sensor; the outlet of the air needle valve is connected with the inlet of the air flow sensor.

Preferably, the oxygen needle valve, the laughing gas needle valve and the air needle valve respectively comprise a valve seat, a valve body, a valve core and an adjusting knob, wherein a small hole is formed in the bottom of the valve body; the valve seat and the valve body are assembled by threads.

Preferably, the valve body is made of high-force brass materials, the sealing ring is a silica gel O-shaped ring, the valve seat is an aluminum valve seat, and the adjusting knob is provided with patterns or a boss.

Preferably, the flow sensor assembly is a thermal mass flow sensor assembly.

Preferably, the oxygen-laughing gas ratio control module controls the ratio of oxygen to laughing gas to be 1:2-1:4, and laughing gas is in a cut-off state when oxygen does not exist.

Preferably, the floating ball type flowmeter further comprises a floating ball flowmeter assembly used for displaying the total flow, and a taper pipe of the floating ball flowmeter assembly is made of transparent high-molecular organic material polycarbonate.

Preferably, the flow display area is an electronic display nixie tube for displaying the measured flow.

Compared with the prior art, the utility model has the advantages that:

1) the oxygen-laughing gas ratio control integrated block is arranged, so that the three times of drift diameter of the oxygen passage can be provided for the laughing gas passage on the premise of oxygen supply, and the oxygen content is prevented from being lower than a normal value.

2) The needle valve changes the gap by rotating to change the distance between the conical matching surfaces, increases the stability of the drift diameter structure and the stability of air flow passing, and realizes the ventilation with small flow, high stability, large flow and low air resistance.

3) The utility model adopts the high-precision thermal mass flow sensor to greatly improve the measurement precision, has smaller resistance, is in the linear range of the sensor in the full range, simultaneously solves the problems of small range measurement, partial double-pipe series measurement and insufficient flow measurement range, and effectively reduces the production and use costs of products; and, because the display adopts the nixie tube, the reading can be clear, the reading error caused by individual difference is reduced, and the method plays a more critical role in improving the measurement precision and the stability of the flow; the floating ball flowmeter for measuring the total flow is formed by adopting a die, the dimensional stability is good, the toughness is good, the floating ball flowmeter is not easy to break, and the assembly efficiency is greatly improved.

Drawings

FIG. 1 is a view of the internal structure of an electrical explicit flow meter according to the present invention;

FIG. 2 is an external structural view of the electrical display flow meter of the present invention;

FIG. 3 is a schematic diagram of the ORC assembly interface of the present invention;

FIG. 4 is a schematic view of a needle valve assembly of the present invention;

FIG. 5 is a structural view of the knob boss and taper fit thread screwing structure of the needle valve of the present invention;

FIG. 6 is a schematic view of a large sheet metal structure of the present invention;

FIG. 7 is a schematic structural view of a large sheet metal positioning and supporting table according to the present invention;

FIG. 8 is a schematic view of a thermal mass flow sensor assembly mounting arrangement of the present invention;

FIG. 9 is a perspective view of the thermal mass flow sensor assembly of the present invention in a pipeline connection manifold configuration;

fig. 10 is a cross-sectional view of a thermal mass flow sensor assembly according to the present invention in a piping connection confluence manner.

Reference numerals:

1. an oxygen needle valve 2, a floating ball flow meter component 3 and an air needle valve; 4. oxygen laughing gas ratio control integrated package, 5, laughing gas needle valve, 6, oxygen flow sensor, 7, laughing gas flow sensor, 8, air flow sensor, 9, the backplate, 10, oxygen adjust knob, 11, air adjust knob, 12, laughing gas adjust knob, 13, the charactron display area, 14, the floating ball flowmeter display area, 15, laughing gas import, 16, laughing gas export, 17, oxygen import, 18, oxygen export, 19, the disk seat, 20, the valve body, 21, the case, 22, adjust knob, 23, the sealing washer, 24, big panel beating, 25, subassembly and machine installation locating hole, 26, panel beating and plastic panel locating hole, 27, the cable aversion area is inserted to the electricity display panel, 28, the location cushion platform.

Detailed Description

The utility model is further illustrated by the following examples and figures.

The utility model adopts a scheme that a precise needle valve is adopted to adjust the flow, a high-precision thermal type mass sensor and an electric display digital tube are adopted to display the measured flow, and an oxygen-to-smile ratio control integrated block (ORC component) is arranged. Fig. 1-2 show a detailed structure diagram of an electrical display flowmeter, which is as follows:

the utility model provides an electric display flowmeter, which comprises a needle valve assembly, a flow sensor assembly and a flow display area, wherein the flow sensor assembly is arranged on one side of the needle valve assembly, the outlets of the flow sensor assembly are commonly connected to an air inlet manifold block, and the electric display flowmeter is also provided with an oxygen-to-smile ratio control manifold block 4 (as shown in figure 3).

Different parameters are adopted according to different gas types (oxygen, laughing gas and air), so that the flow can be flexibly and stably regulated. The oxygen-laughing gas ratio control module comprises an oxygen inlet 17, an oxygen outlet 18, a laughing gas inlet 15 and a laughing gas outlet 16; the oxygen-laughing gas ratio control module controls the ratio of oxygen-laughing gas to be 1:3, and laughing gas is in a cut-off state when oxygen does not exist.

The needle valve assembly comprises an oxygen needle valve 1, a laughing gas needle valve 4 and an air needle valve 3 which are arranged side by side; oxygen needle valve 1, laughing gas needle valve 4 and air needle valve 3 all include disk seat 19, valve body 20, case 21 and adjust knob 22, are oxygen adjust knob 10, air adjust knob 11 and laughing gas adjust knob 12 (as shown in fig. 4) respectively promptly, wherein, valve body 20 bottom sets up the aperture, is equipped with the cavity in the valve body 20, and the one end of case 21 is the toper shape, and cavity and case shape phase-match, and valve body 20 bottom sets up aperture and case 21 toper cooperation adjustment clearance. The needle valve assembly adopts a stable air flow conical matching thread screwing structure, the opening degree is accurately controlled, the flow stability is ensured, and the sensitivity and the stability of flow adjustment are improved.

The other end of the valve core 21 is connected with an adjusting knob 22, and the valve core 21 and the valve body 20 are sealed by a plurality of sealing rings 23, so that the air tightness of parts is ensured and the service life of the parts is prolonged; the valve seat 19 is threadedly assembled with the valve body 20. The valve body is the high-force brass material, sealing washer 23 is silica gel O type circle, disk seat 19 is aluminium system disk seat, adjust knob 22 sets up decorative pattern or boss, as shown in fig. 5, the structure is twisted soon to needle valve knob boss and toper cooperation screw thread.

The flow sensor assembly comprises an oxygen flow sensor 6, a laughing gas flow sensor 7 and an air flow sensor 8; the flow sensor assembly is a thermal mass flow sensor assembly, the measurement precision is greatly improved by adopting a high-precision thermal mass flow sensor, the resistance is small, and the whole range is within a sensor linear interval. The arrangement structure of the thermal mass flow sensor assembly comprises a fixing mode (as shown in fig. 8), namely, an oxygen flow sensor 6, a laughing gas flow sensor 7 and an air flow sensor 8 are fixed on a back plate 9 through screws, and a pipeline connecting and converging mode (as shown in fig. 9-10), namely, gas in three pipelines of the air flow sensor 6, the laughing gas flow sensor 7 and the air flow sensor 8 is converged into the same pipeline to be output.

Wherein, the outlet of the oxygen needle valve 1 is connected with the oxygen inlet 17 of the oxygen ratio control module, and the oxygen outlet 18 is connected with the inlet of the oxygen flow sensor 6; the outlet of the laughing gas needle valve 5 is connected with a laughing gas inlet 15 of the oxygen-laughing ratio control module, and a laughing gas outlet 16 of the laughing gas needle valve is connected with an inlet of a laughing gas flow sensor 7; the outlet of the air needle valve is connected with the inlet of the air flow sensor.

The electric display flowmeter further comprises a floating ball flowmeter component 2 used for displaying the total flow, a taper pipe of the floating ball flowmeter component 2 is made of transparent high polymer organic material Polycarbonate (PC), a floating ball flowmeter display area 14 is molded through a mold, the size stability is good, the toughness is good, the breaking is not prone to occurring, and the assembly efficiency is greatly improved. Namely, the outlets of the thermal mass flow sensors are connected to the air inlet manifold block together, and the total flow is displayed through the low air resistance floating ball flow meter after the gas is mixed. The outlet of the floating ball flowmeter can be connected with a bypass valve to enter the evaporating pot, and the front panel of the floating ball flowmeter is of a transparent organic glass structure (fixed by the way) to protect the floating ball flowmeter and facilitate cleaning.

The flow display area is an electronic display nixie tube and is used for displaying the measured flow. High definition charactron direct-viewing shows real-time flow, reduces artificial reading error, two behind the low flow decimal point, one behind the high flow decimal point, and 13 dark translucent construction of panel in this charactron display area, this structure can clearly see the number and can not see inside circuit board and structure and charactron display area panel dark translucent fixed knot construct, can block into the front panel and be difficult to drop.

According to the utility model, the clearance change of the opening degree of the needle valve causes the drift diameter change, when the opening degree of the needle valve is smaller, the drift diameter is smaller, and when the flow is smaller, the detection precision of the sensor is higher. In the process that the opening degree of the needle valve is increased, the sensor can measure a large measuring range at the same time, and the precision is still in an ideal linear interval. Meanwhile, the nixie tube is used for displaying, so that reading can be clear, reading errors caused by individual differences are reduced, and the method plays a more critical role in improving the measurement precision and the stability of flow. The ORC component is arranged to ensure that under the premise of oxygen supply, the three times of drift diameter of the oxygen passage can be provided for the laughing gas passage, and the oxygen content is prevented from being lower than a normal value.

The utility model also comprises a component and machine installation positioning hole 25, a metal plate and plastic panel positioning hole 26 and an electric display panel plug cable avoiding area 27 which are arranged on the large metal plate 24, and the integral large metal plate and front panel component thread locking mechanism ensures that the flow detection and the flow control can be separately assembled, thereby improving the production, maintenance and repair efficiency. The whole assembly and the equipment are fixed by adopting a hole screw matching structure, a bearing platform 28 is arranged below the large metal plate 24, and stress points and a positioning structure are added (as shown in figures 6-7).

Conventional technical knowledge in the art can be used for the details which are not described in the present invention.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. An electrical display flow meter comprising: the flow sensor assembly is arranged on one side of the needle valve assembly, and the outlet of the flow sensor assembly is connected to the air inlet integrated block together;

2. The electrometric flowmeter as claimed in claim 1, wherein the oxygen needle valve, the laughing gas needle valve and the air needle valve each comprise a valve seat, a valve body, a valve core and an adjusting knob, wherein the bottom of the valve body is provided with a small hole, a cavity is arranged in the valve body, one end of the valve core is in a conical shape, the cavity is matched with the shape of the valve core, the other end of the valve core is connected with the adjusting knob, and the valve core and the valve body are sealed by a plurality of sealing rings; the valve seat and the valve body are assembled by threads.

3. The flowmeter of claim 2, wherein the valve body is a high-force brass material, the sealing ring is a silicone O-ring, the valve seat is an aluminum valve seat, and the adjusting knob is provided with patterns or bosses.

4. The flowmeter of claim 1 wherein the flow sensor assembly is a thermal mass flow sensor assembly.

5. The electronic display flow meter according to claim 1, wherein the oxygen-laughing ratio control module controls the ratio of oxygen laughing gas to be 1:2-1:4, and laughing gas is in a cut-off state when no oxygen is present.

6. The flowmeter of claim 1, further comprising a float ball flowmeter assembly for displaying the total flow rate, wherein the cone of the float ball flowmeter assembly is made of a transparent polymer organic material polycarbonate.

7. The flowmeter of claim 1 wherein said flow display area is an electronic display nixie tube for displaying the measured flow.