CN107913451B - Gas regulating system and modularized gas regulating device - Google Patents

Gas regulating system and modularized gas regulating device Download PDF

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Publication number
CN107913451B
CN107913451B CN201711489131.0A CN201711489131A CN107913451B CN 107913451 B CN107913451 B CN 107913451B CN 201711489131 A CN201711489131 A CN 201711489131A CN 107913451 B CN107913451 B CN 107913451B
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gas
cavity
module
opening
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CN107913451A (en
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马改陵
刘德锋
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Shanghai Drager Medical Equipment Co ltd
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Shanghai Drager Medical Equipment Co ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/12—Preparation of respiratory gases or vapours by mixing different gases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • A61M2205/3337—Controlling, regulating pressure or flow by means of a valve by-passing a pump
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Accessories For Mixers (AREA)

Abstract

The invention provides a gas regulating system and a modularized gas regulating device, wherein the gas regulating system comprises at least two paths of gas transmission units and a proportional mixing unit with an inner cavity, each path of gas transmission unit comprises an input end and an output end, the output ends are communicated with the inner cavity, and the input ends are respectively communicated with a corresponding gas source; a pressure reducing valve is arranged on each path of gas transmission unit and is used for reducing pressure of gas flowing through the pressure reducing valve; the proportion mixing unit is used for carrying out proportion adjustment, mixing and output on at least two paths of gases entering the inner cavity. According to the gas regulating system and the modularized gas regulating device, the pressure of each gas is regulated to be equal or close before mixing by arranging the pressure reducing valve on each gas transmission unit, so that the problem that in the prior art, the mixing device is invalid in regulation due to the fact that the fluctuation range of the gas pressure provided by a factory-end gas source is large, and the gas pressure value in a certain path is too high during mixing is solved.

Description

Gas regulating system and modularized gas regulating device
Technical Field
The invention belongs to the field of medical instruments, and relates to a gas regulating system and a modularized gas regulating device.
Background
The air-oxygen mixer is used for mixing air and oxygen, and when the input pressure difference of the air and the oxygen is more than 2.1bar, the air-oxygen mixer in the medical equipment in the prior art can generate the problem that the oxygen concentration is inaccurate or even cannot be controlled, and simultaneously gives an alarm. Although the mixer can still output mixed gas at this time, the concentration of oxygen in the mixed gas cannot be determined, the function which the medical equipment should play cannot be realized, and the pressure range of the air sources of air and oxygen in the hospital is mostly 2.7bar to 6.9bar at present, the pressure difference between the two is more likely to be more than 2.1bar, so that the mixed gas output by the mixer can have the phenomena of inaccurate oxygen concentration control and even alarm.
Disclosure of Invention
The invention aims to provide a gas regulating system and a modularized gas regulating device, which solve the problem that in the prior art, the mixing proportion of mixed gas output by a mixing device is inaccurate due to pressure deviation of gas source gas.
In order to solve the technical problems, the invention provides a gas regulating system and a modularized gas regulating device, wherein the gas regulating system comprises at least two paths of gas conveying units and a proportional mixing unit with an inner cavity, each path of gas conveying unit comprises an input end and an output end, the output ends are communicated with the inner cavity, and the input ends are respectively communicated with a corresponding gas source; each path of gas transmission unit is provided with a pressure reducing valve which is used for reducing pressure of gas flowing through; the proportion mixing unit is used for carrying out proportion adjustment, mixing and output on at least two paths of gases entering the inner cavity.
Further, the proportion mixing unit adjusts the mixing proportion of the output gas by adjusting the volume ratio of the two paths of gas entering the inner cavity.
Further, the structure, the size and the connection mode of the pressure reducing valve arranged on each path of gas transmission unit are the same, and the pressure value of the gas after pressure reduction set by the pressure reducing valve is the same.
Further, the gas regulating system further comprises a balancing unit, wherein the balancing unit is arranged between the output ends of the at least two paths of gas transmission units and the proportional mixing unit and is used for balancing the pressure of the gas output by the at least two paths of gas transmission units.
Further, the balancing unit is provided with a cavity and comprises a balancing piece, the balancing piece is arranged in the cavity and separates the cavity into a first sub-cavity and a second sub-cavity, the first sub-cavity is provided with a first input port and a first output port, and the second sub-cavity is provided with a second input port and a second output port; the at least two gas transmission units comprise a first gas transmission unit and a second gas transmission unit, the output end of the first gas transmission unit is communicated with a first input port, and the input end is used for being communicated with a first gas source; the output end of the second gas transmission unit is communicated with the second input port, and the input end is used for being communicated with a second gas source; the first output port and the second output port are communicated with the inner cavity of the proportional mixing unit; the balance piece can move to change the volume ratio of the first sub-cavity to the second sub-cavity.
Further, the proportional mixing unit further comprises an adjusting piece and an adjusting knob, wherein the adjusting piece is arranged in the inner cavity and divides the inner cavity into a first sub-inner cavity and a second sub-inner cavity which are communicated with each other; the proportional mixing unit is provided with three openings which are communicated with the inner cavity, namely a first opening, a second opening and a third opening; the first output port of the balancing unit is communicated with the first opening, and the second output port is communicated with the second opening; the gas input by the first opening flows through the first subchamber and then flows out of the third opening; the gas input by the second opening flows through the second subchamber and then flows out of the third opening; the adjusting knob is connected with the adjusting piece and used for driving the adjusting piece to move so as to change the volume ratio of the first sub-inner cavity to the second sub-inner cavity; and the third opening is used for outputting the mixed gas after the proportion adjustment and the mixing.
Further, the part of the adjusting knob, which is close to one end of the adjusting piece, is provided with an external thread, the proportional mixing unit is provided with a threaded hole with an internal thread, the adjusting knob is movably connected with the threaded hole thread through the external thread, and one end of the adjusting knob penetrates through the threaded hole to be connected with the adjusting piece.
Further, the gas regulating system further comprises an alarm unit, wherein the alarm unit is respectively communicated with the output end of each path of gas conveying unit, and is used for respectively measuring the gas pressure value of the depressurized gas output by the output end and judging whether to send an alarm according to the gas pressure value.
The application also provides a modularized gas regulating device, which comprises two gas transmission modules and a regulating module, wherein each gas transmission module is used for decompressing gas flowing through and is provided with a gas inlet and a gas outlet, the gas inlet is used for being connected with a gas source, and the gas outlet is used for outputting the decompressed gas; the regulating module is used for carrying out proportion regulation, mixing and output on the gas entering the regulating module and is provided with three interfaces, namely a first interface, a second interface and a third interface; the first interface and the second interface are respectively communicated with the air outlets of the two air transmission modules in a sealing contact manner, and the third interface is used for outputting mixed gas subjected to proportion adjustment and mixing.
Further, the adjusting module comprises a proportional mixing module with an inner cavity, the three interfaces are all communicated with the inner cavity, and the proportional mixing module is used for carrying out proportional adjustment, mixing and output on at least two paths of gases entering the inner cavity.
Further, the proportional mixing module comprises an adjusting piece and an adjusting knob, wherein the adjusting piece is arranged in the inner cavity and divides the inner cavity into a first sub-inner cavity and a second sub-inner cavity which are communicated with each other; the proportional mixing module is provided with three openings which are communicated with the inner cavity, namely a first opening, a second opening and a third opening; the first opening and the second opening are respectively communicated with the first interface and the second interface, and the third opening is communicated with the third interface; the gas input by the first opening flows through the first subchamber and then flows out of the third opening; the gas input by the second opening flows through the second subchamber and then flows out of the third opening; the adjusting knob is connected with the adjusting piece and used for driving the adjusting piece to move so as to change the volume ratio of the first sub-inner cavity to the second sub-inner cavity; and the third opening is used for outputting the mixed gas after the proportion adjustment and the mixing.
Further, the adjusting module further comprises a balancing module, the balancing module is arranged between the two gas transmission modules and the proportional mixing module, and the balancing module is used for balancing the pressure of the two paths of gas output by the first interface and the second interface and respectively inputting the two paths of balanced gas into the first opening and the second opening.
Further, the balancing module is provided with a cavity and comprises a balancing piece, the balancing piece is arranged in the cavity and separates the cavity into a first sub-cavity and a second sub-cavity, the first sub-cavity is provided with a first input port and a first output port, and the second sub-cavity is provided with a second input port and a second output port; the first interface is communicated with the first input port, the first output port is communicated with the first opening, the second interface is communicated with the second input port, and the second output port is communicated with the second opening; the balance piece can move to change the volume ratio of the first sub-cavity to the second sub-cavity.
Furthermore, the modularized gas regulating device further comprises a mounting panel, and the regulating module and the two gas transmission modules are mounted on the mounting panel.
Furthermore, the adjusting module and the two gas transmission modules are both arranged on the same side of the mounting panel, and the two gas transmission modules are symmetrically arranged on two sides of the adjusting module to form a T-shaped structure.
Further, an external thread is arranged at the part of the adjusting knob, which is close to one end of the adjusting piece, a threaded hole matched with the external thread and provided with an internal thread is formed in the adjusting module, and a mounting hole corresponding to the threaded hole is formed in the mounting panel; one end of the adjusting knob penetrates through the mounting hole and the threaded hole to be connected with the adjusting piece, the adjusting knob is movably connected with the threaded hole in a threaded mode, and the part, close to the other end of the adjusting knob, is located on the other side of the mounting panel.
Further, the adjusting module is provided with a first surface, a second surface, a third surface and a fourth surface, wherein the first surface and the second surface are opposite, the first interface and the second interface are respectively arranged on the first surface and the second surface, the third interface is arranged on the fourth surface, the third surface is inwards recessed to form a containing space, and the balancing module is arranged in the containing space; the two gas transmission modules are respectively connected with the first surface and the second surface, and the two gas outlets of the two gas transmission modules are respectively communicated with the first interface and the second interface in a sealing contact manner.
Further, the gas regulating device further comprises an alarm module, wherein the alarm module is respectively communicated with the gas outlet of each gas transmission module, and is used for respectively measuring the gas pressure value of the depressurized gas output by the gas outlet and judging whether to send out an alarm according to the gas pressure value.
Further, each gas transmission module comprises a pressure reducing valve, and two ends of the pressure reducing valve are respectively communicated with the gas inlet and the gas outlet and are used for reducing pressure of gas flowing through the pressure reducing valves.
Furthermore, the structure, the adopted materials and the connection mode of the two gas transmission modules and the adjusting module are the same.
Furthermore, the connecting channels in the modularized gas regulating device are formed by arranging channels inside the modularized gas regulating device.
Compared with the prior art, the application provides the gas regulating system and the modularized gas regulating device, and the pressure of each gas is regulated to be equal or close before mixing by arranging the pressure reducing valve on each gas transmission unit, so that the problem that the regulating failure of the mixer occurs due to the fact that the fluctuation range of the gas pressure provided by the factory-end gas source is large in the prior art and the gas pressure value in a certain path is too high in the mixing process is solved. In addition, the application further provides a balancing unit for further pressure adjustment of the depressurized gas, and prevents the phenomenon that the depressurized gas still has pressure deviation caused by the precision of the depressurization valve, the installation precision and the like, so that the influence of inaccurate adjustment of the mixing proportion caused by the pressure difference of the gas can be eliminated during mixing. In addition, the application also improves the mixing unit of the comparative example, so that an operator can realize continuous adjustment of the mixing proportion of the mixed gas only through the adjusting knob.
The gas regulating device does not contain an electromagnetic valve, and all the connecting channels are formed by arranging the channels in the structure, so that the electromagnetic valve and a special rubber or metal connecting pipeline in the prior art are completely abandoned, the structure of the gas regulating device is more compact, and the integration level is higher.
In addition, the gas regulating device is purely pneumatic control, gas is input into the gas transmission modules through gas sources connected with the gas transmission modules, the depressurized gas output by the gas outlets of the gas transmission modules is input into the regulating modules, the balance modules of the regulating modules change the volume ratio of the first containing cavity and the second containing cavity through the balance pieces, so that the pressure balance of the two paths of gas is further realized, and the pressure difference is further reduced; the two paths of gas regulated by the balancing module enter the proportional mixing module, and the user regulates the regulating knob to drive the regulating motion, so that the volume ratio of the first inner cavity to the second inner cavity is changed, the proportion of the two paths of gas entering the inner cavity of the proportional mixing module is regulated, and the accurate regulation of the proportional mixing of the gas is realized.
Drawings
FIG. 1 is a schematic diagram of a gas conditioning system according to an embodiment of the present application;
FIG. 2 is a block diagram of a modular gas regulating device according to one embodiment of the present invention;
FIG. 3 is a block diagram of a balancing module in a modular gas regulating apparatus according to one embodiment of the present invention;
fig. 4 is a schematic view of the installation of a modular gas regulating device according to an embodiment of the present invention.
Wherein, 10-a first gas transmission unit; 20-a second gas delivery unit; 30-a proportional mixing unit; 40-a pressure reducing valve; a 50-balancing unit; a 60-alarm unit; 10 a-an input of a first gas delivery unit; 10 b-the output of the first gas delivery unit; 20 a-an input of a second gas delivery unit; 20 b-the output of the second gas delivery unit; 31-lumen; 31 a-a first sub-lumen; 31 b-a second sub-lumen; 32-an adjusting member; 33-an adjustment knob; 30 a-a first opening; 30 b-a second opening; 30 c-a third opening; 51. 320 a-a first input port; 52. 320 c-a second input port; 53. 320 b-a first output port; 54. 320 d-a second output port; 55-holding cavity; 56-balancing piece; 55 a-a first subchamber; 55 b-a second subchamber; 100. 200-gas transmission module; 300-an adjustment module; 310-a proportional mixing module; 320-balancing module; 400-mounting a panel; 500-alarm module.
Detailed Description
The invention provides a gas mixing device, a gas mixing valve gas regulating system and a modularized gas regulating device, which are further described in detail below with reference to the accompanying drawings and the specific embodiments. Advantages and features of the invention will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. The same or similar reference numbers in the drawings refer to the same or similar parts.
Based on the standard of the existing national medical gas, the air and oxygen provided by the air source device of the hospital meet the national standard within the range of 2.7bar to 6.9 bar. Because the pressure range of the air and the oxygen provided by the air source is larger, the prior art is mostly regulated by virtue of the mixer, so that the pressure of the air and the oxygen after passing through the mixer tends to be balanced, and finally, the concentration of the oxygen in the mixed gas of the air and the oxygen can be regulated.
The structure of the existing mixer is mainly characterized in that a primary or a secondary balance mechanism is arranged, and primary pressure balance or secondary pressure balance is carried out on two paths of gases at two ends of the balance mechanism. For the principle of single pressure balance, air and oxygen supplied by a hospital air source are respectively introduced from two ends of the mixer, when the pressure value of which gas is large, the balance mechanism can move in opposite directions under the pushing of the gas with large pressure, so that the volume of the gas with small pressure is reduced, and the pressure is increased, thereby achieving the purpose of adjusting the equal pressure when the two gases are mixed. However, whether a primary pressure mechanism or a two-stage pressure balance mechanism is adopted, the existing mixer has a certain limitation in adjusting the pressure difference, when the pressure difference between two gases before entering the mixer is too large (for example, the pressure difference between the two gases is larger than 2.1 bar), even if the pressure of the gas with large pressure pushes the balance mechanism to the other end directly, the pressure value of the gas with small pressure cannot be increased to be equal to the pressure value of the gas with large pressure, and at this time, the pressure value of the two gases cannot be adjusted to be equal through the mixer, so that the mixer cannot work normally.
According to the design, the pressure reducer is arranged in front of the balancing mechanism, so that the pressure of the air and the oxygen can be adjusted to (or reduced to) a very close pressure value (at least the pressure difference between the air and the oxygen is smaller than 2.1bar, and if the structural design and the machining precision of the pressure reducer can meet the requirements, the pressure difference between the air and the oxygen can be close to 0 bar) before the air and the oxygen enter the balancing valve, and therefore the problems are solved, and faults caused by large pressure differences are avoided.
FIG. 1 is a schematic diagram of a gas conditioning system according to an embodiment of the present invention. Referring to fig. 1, a gas regulating system provided in this embodiment includes at least two gas delivery units 10 and 20, and a proportional mixing unit 30 having an inner cavity 31, each gas delivery unit includes an input end, an output end and a connection channel, the output end is communicated with the inner cavity 31, and the input ends are respectively communicated with a corresponding gas source; a pressure reducing valve 40 is arranged on each path of gas transmission unit, and the pressure reducing valve 40 is used for reducing pressure of gas flowing through; the proportioning unit 30 is used for proportioning, mixing and outputting at least two gases entering the inner cavity 31. The gas regulating system is a pure pneumatic control system, the gas of the two gas transmission units is decompressed respectively, then the two gas is mixed by the proportion mixing unit 30, the proportion of the two gas is regulated by the proportion mixing unit 30, rather than the two gas is regulated by the flow rate respectively to regulate the proportion of the two gas, and then the two gas is mixed. Therefore, the whole air path system is simpler, reliable and convenient to operate, and an electric control part is not needed.
As described in the above analysis, since the range of the pressure fluctuation of the gas provided by the plant-side gas source is larger, in this embodiment, the pressure of the gas source is adjusted by setting the pressure reducing valve 40 on each gas delivery unit, so that the pressure value of the gas output by the output end of each gas delivery unit is equal or close to the pressure value, and thus, when the gas is mixed in proportion by the proportion mixing unit 30, the problem that the proportion adjustment of the proportion mixing unit 30 fails due to the excessively high pressure value of the gas in a certain path will not occur. In addition, the gas regulating system provided in this embodiment may be suitable for mixing two or more gases in proportion, that is, the gas transmission unit may be two or more gas transmission units, and when the gas transmission units are two gas transmission units, the gas sources connected to the input ends of the two gas transmission units are different, that is, the two gases are different, so that mixing of the two gases may be achieved; when the gas supply unit is more than two paths of gas supply units, for example, three paths of gas supply units, the gas supply unit can be realized in a multi-stage mixing mode, for example, firstly, certain two gases are mixed in proportion by utilizing the system, and then, the mixed gases are mixed with the third gas in proportion. The pressure reducing valve in this embodiment may be integrally disposed with the gas transmission unit of each path, or the pressure reducing valve may be communicated with the gas transmission unit through a pipeline to reduce pressure.
As an implementation of the present application, the mixing ratio of the output gas is adjusted by the proportional mixing unit 30 by adjusting the volume ratio of the two gas paths entering the inner chamber 31. Since the gas pressure values of the two gas paths after being depressurized by the depressurization valve 40 are nearly equal, there is little pressure difference between the two gas paths inputted into the proportional mixing unit 30, and at this time, the mixing ratio of the gas paths outputted can be accurately adjusted by adjusting the volume ratio of the two gas paths inputted into the inner chamber 31. And the two gases are proportioned and mixed in the chamber 31 after depressurization.
In order to ensure that the pressure values of the gas output by the gas in the two gas transmission units after being decompressed by the decompression valve 40 are equal as much as possible, in this embodiment, the structure, the machining precision, the model, the size and the connection mode of the decompression valve 40 arranged on each gas transmission unit are preferably the same, and the pressure values of the gas after being decompressed set by the decompression valve 40 are the same. Thus, the error of the pressure difference of the two paths of gas entering the proportional mixing unit 30 due to the material, machining precision, model, connection mode of the pressure reducing valve 40 and the like can be reduced as much as possible. In practice, the gas pressure difference between the two gas transfer units after passing through the two pressure reducing valves 40 may be 0-0.8bar.
Although in the above embodiment, the pressure value of the gas in each gas delivery unit is adjusted by setting the pressure reducing valve 40, and the two gas delivery units select the pressure reducing valve 40 with the same structure, size and material as much as possible, and the same connection mode is adopted, so that the gas pressure values output by each gas delivery unit are as equal or close as possible, due to the problems of different machining precision, adjusting precision, component installation and pipeline loss of the pressure reducing valve, the gas pressure values output by each gas delivery unit cannot be equal or close in practical application, and there may be a phenomenon that the gas pressure values output by the gas delivery units in different ways have large differences (sometimes, the pressure difference of the gas output by the two gas delivery units in different ways may be greater than 2.1 bar), at this time, when the two gases with large pressure differences are mixed in the proportional mixing unit, the pressure difference may change the volumes of the two subchambers in the initial state of the proportional mixing unit, so that a deviation between the gas proportion of the proportional mixing unit and the setting is generated, and the purpose of accurately adjusting the proportion of the two gases cannot be achieved.
In order to solve this problem, the gas regulating system of the present embodiment further includes a balancing unit 50, where the balancing unit 50 is disposed between the output ends of the at least two gas delivery units and the proportional mixing unit 30, and is configured to perform pressure balancing on the gas output by the at least two gas delivery units. In this way, the pressure balance adjustment can be further performed on the two paths of gas entering the proportional mixing unit 30, so that the pressure difference is further reduced, and the proportional mixing precision of the proportional mixing unit 30 is improved.
Preferably, the balancing unit 50 has a cavity 55 and includes a balancing member 56, and the balancing member 56 is disposed in the cavity 55 and separates the cavity 55 into a first sub-cavity 55a and a second sub-cavity 55b. The first sub-chamber 55a has a first input port 51 and a first output port 53, and the second sub-chamber has a second input port 52 and a second output port 54; the at least two gas transmission units comprise a first gas transmission unit 10 and a second gas transmission unit 20, wherein an output end 10b of the first gas transmission unit 10 is communicated with a first input port 51, and an input end 10a is used for being communicated with a first gas source (not shown in the figure); the output end 20b of the second gas delivery unit 20 is connected to the second input port 52, and the input end 20a is connected to a second gas source (not shown); the first output port 53 and the second output port 54 are both communicated with the inner cavity 31 of the proportional mixing unit 30; the balance member 56 is movable to change the volume ratio of the first sub-chamber 55a to the second sub-chamber 55b.
In this embodiment, in the initial state, the volumes of the first sub-chamber 55a and the second sub-chamber 55b are equal; when the pressure of the gas entering the first input port 51 is greater than the pressure of the gas entering the second input port 52, the pressure of the gas in the first sub-chamber 55a is greater than the pressure of the gas in the second sub-chamber 55b, and at this time, the balance member 56 will move along the horizontal direction under the pushing of the gas with higher gas pressure value, so that the volume of the second sub-chamber 55b becomes smaller, the pressure increases until the pressures of the two gases are equal, and the balance member 56 reaches the balance state and stops moving, thereby achieving the purpose of further adjusting the gas pressure values of the two gases. Wherein the balancing member 56 may divide the cavity 55 into left and right sub-cavities 55a and 55b, as shown in fig. 1; however, the present application is not limited thereto, and the cavity 55 may be divided into two sub-cavities, namely, an upper sub-cavity and a lower sub-cavity, or even the balance member is disposed obliquely, and the cavity 55 may be divided into two sub-cavities having a trapezoid cross section, or even the cavity 55 may be divided into two cavities having different volumes in an initial state. It is understood that the implementation of the balancing member 56 to separate the cavity 55 into two sub-cavities is within the scope of the present application.
In the present application, the proportional mixing unit may include an adjusting member 32 and an adjusting knob 33, the adjusting member 32 being disposed in the inner chamber 31 and dividing the inner chamber 31 into a first sub-chamber 31a and a second sub-chamber 31b which are communicated; the proportional mixing unit 30 has three openings, a first opening 30a, a second opening 30b, and a third opening 30c, communicating with the inner chamber 31; the first output port 53 of the balancing unit 50 communicates with the first opening 30a, and the second output port 54 communicates with the second opening 30 b; the gas input from the first opening 30a flows through the first sub-cavity 31a and then flows out of the third opening 30c; the gas input from the second opening 30b flows through the second sub-cavity 31b and then flows out of the third opening 30c; the adjusting knob 33 is connected to the adjusting member 32 and is used for driving the adjusting member 32 to move so as to change the volume ratio of the first sub-inner cavity 31a to the second sub-inner cavity 31b; the third opening 30c is used for outputting the mixed gas after the proportion adjustment and the mixing.
It should be understood by those skilled in the art that, since the function of the inner chamber 31 is to mix the gas, the first inner sub-chamber 31a and the second inner sub-chamber 31b are connected, that is, there is no strict physical limitation between the first inner sub-chamber 31a and the second inner sub-chamber 31b, only for convenience of description, the space occupied by the gas inputted through the first opening 30a in the inner chamber 31 flowing through the first inner sub-chamber 31a is the space occupied by the gas inputted through the second opening 30b in the inner chamber 31 flowing through the second inner sub-chamber 31b. Since the pressures of the gases outputted from the first and second output ports 53 and 54 to the first and second openings 30a and 30b are equal or very close, the two gases are theoretically mixed in equal proportion in the proportional mixing unit 30 unless the adjusting member 32 and the adjusting knob 33 are provided. In order to adjust the mixing ratio of the two gases according to the need, in this embodiment, the volume ratio of the first sub-inner chamber 31a to the second sub-inner chamber 31b is changed by moving the adjusting member 31 disposed in the inner chamber 31, so as to achieve the purpose of adjusting the mixing ratio. For example, as shown in fig. 1, when the adjusting knob 34 adjusts the adjusting member 32 to move to the left, the volume of the left portion of the inner chamber 31 becomes smaller, and the volume of the right portion of the inner chamber becomes larger, at this time, the flow rate of the gas flowing through the left portion of the inner chamber will be smaller than the flow rate of the gas flowing through the right portion of the inner chamber, that is, the flow rate of the gas inputted through the first opening 30a is smaller than the flow rate of the gas inputted through the second opening 30b, so that the purpose of achieving the adjustment of the mixing ratio of the two gases by the adjusting member 32 and the adjusting knob 33 is achieved.
It can be seen that, due to the structural characteristics of the proportional mixing unit 30 in this embodiment, in order to ensure the accuracy of adjusting the mixing ratio of the two gases, strict requirements must be placed on the pressure difference between the gases entering through the first opening 30a and the second opening 30b, and no pressure difference or a very small pressure difference must be ensured as much as possible between the two pressure differences, so that the accuracy of mixing the two gases in the proportional mixing unit 30 in this embodiment of the present application can be ensured.
As an implementation manner of this embodiment, a portion of the adjusting knob 33 near one end of the adjusting member 32 has an external thread, the proportional mixing unit 30 is provided with a threaded hole having an internal thread, the adjusting knob 33 is movably connected with the threaded hole by the external thread, and one end of the adjusting knob 33 is connected with the adjusting member 32 through the threaded hole. For example, the adjusting knob 33 includes a threaded rod, and when the adjusting knob 33 is rotated, the threaded rod is advanced or retracted in a threaded direction, so that the adjusting member 32 is driven to move left and right, thereby changing the volume ratio of the first sub-chamber 31a to the second sub-chamber 31 b.
As a preferable solution of this embodiment, the gas mixing device may further include an alarm unit 60, where the alarm unit 60 is respectively connected to the output end of each gas transmission unit, and is configured to respectively measure the gas pressure values of the depressurized gas output by the output end, and determine whether to issue an alarm according to the gas pressure values. After the pressure reducer 40 is adjusted, the pressure values of the gases output by the at least two paths of gas transmission units are still different greatly, and when the pressure values exceed the set pressure difference value, the alarm unit 60 can alarm to remind operators when the proportional mixing unit 30 cannot realize accurate mixing proportion adjustment on multiple gases with large pressure difference values.
In the prior art, when the ratio of two or more gases is adjusted, the flow rates of the two gases are generally adjusted, and then the adjusted gases are mixed. The invention firstly decompresses the two paths of gases, adjusts the pressure difference of the two paths of gases to the smallest possible range (the pressure is the same as the pressure setting, but the output is possibly different), then balances the pressure based on the decompressed gases through the balancing unit, so that the pressure difference of the two paths of gases is as small as possible (close to 0), and eliminates the influence of the pressure difference on the mixing/proportion adjustment.
Referring to fig. 2 and 3, which are block diagrams of a modularized gas regulator and partial components in the modularized gas regulator according to the present application, and description is made of the modularized gas regulator according to the system gas circuit diagram of fig. 1, the modularized gas regulator according to the present embodiment includes two gas delivery modules 100, 200 and a regulating module 300, each of the gas delivery modules is configured to decompress a gas flowing therethrough, and has a gas inlet and a gas outlet (corresponding to an input end and an output end of a gas delivery unit in the gas regulating system), the gas inlet is configured to be connected to a gas source, and the gas outlet is configured to output the decompressed gas; the adjusting module 300 is configured to perform proportion adjustment, mixing and output of the gas entering the adjusting module, and has three interfaces, namely a first interface, a second interface and a third interface (not shown in the figure); the first interface and the second interface are respectively communicated with the air outlets of the two air transmission modules in a sealing contact manner, and the third interface is used for outputting mixed gas subjected to proportion adjustment and mixing. In this scheme, with gas transmission module and regulating module integration relatively independent structural module on each physical structure, when gas regulating device assembles, only need accomplish the interface butt joint between each module can accomplish the equipment of device, when dismantling the maintenance, also only need dismantle the module of trouble maintenance change can for the assembly is dismantled very conveniently. Moreover, after adopting modularized structural design for the structure is compacter, and area is littleer, and, be connected through gas piping connection between the pressure reducer of prior art, the blender, and the plug is inconvenient, and the integrated level between each device is less, and perhaps one device is on the horizontal plane, and another device is on the perpendicular, and whole device's is bulky, and manufacturing link installation is inconvenient, and is with high costs, and it is also inconvenient to maintain. The interfaces of the modules can be directly communicated in a sealing contact way, and the method of connecting the modules or components by using rubber or metal pipelines in the prior art is not needed, so that the defects in the prior art are overcome.
As an implementation manner of this embodiment, the adjusting module 300 includes a proportional mixing module 310 having an inner cavity, where all the three interfaces are communicated with the inner cavity, and the proportional mixing module 310 is configured to perform proportional adjustment, mixing, and output on at least two paths of gases entering the inner cavity.
Further preferably, the proportional mixing module 310 includes an adjusting member and an adjusting knob, wherein the adjusting member is disposed in the inner cavity and divides the inner cavity into a first sub-inner cavity and a second sub-inner cavity which are communicated with each other; the proportional mixing module 310 has three openings in communication with the internal cavity, a first opening, a second opening, and a third opening; the first opening and the second opening are respectively communicated with the first interface and the second interface, and the third opening is communicated with the third interface; the gas input by the first opening flows through the first subchamber and then flows out of the third opening; the gas input by the second opening flows through the second subchamber and then flows out of the third opening; the adjusting knob is connected with the adjusting piece and used for driving the adjusting piece to move so as to change the volume ratio of the first sub-inner cavity to the second sub-inner cavity; and the third opening is used for outputting the mixed gas after the proportion adjustment and the mixing.
As a preferred solution of this embodiment, the adjusting module 300 further includes a balancing module 320, where the balancing module 320 is disposed between the two gas delivery modules and the proportional mixing module 310, and the balancing module 320 is configured to perform pressure balancing on the two paths of gas output by the first interface and the second interface, and input the two paths of balanced gas into the first opening and the second opening respectively.
Preferably, the balancing module 320 has a cavity, and includes a balancing member disposed in the cavity and isolating the cavity into a first sub-cavity and a second sub-cavity, the first sub-cavity having a first input port 320a and a first output port 320b, and the second sub-cavity having a second input port 320c and a second output port 320d; the first interface communicates with the first input port 320a, the first output port 320b communicates with the first aperture, the second interface communicates with the second input port 320c, and the second output port 320d communicates with the second aperture; the balance piece can move to change the volume ratio of the first sub-cavity to the second sub-cavity.
Further, referring to fig. 4, the gas regulating device further includes a mounting panel 400, and the regulating module 300 and the two gas delivery modules 100 and 200 are mounted on the mounting panel 400.
Preferably, the adjusting module 300 and the two air delivery modules 100 and 200 are mounted on the same side of the mounting panel 400, and the two air delivery modules 100 and 200 are symmetrically disposed on two sides of the adjusting module 300 to form a T-shaped structure.
Wherein, the adjusting knob has an external thread near one end of the adjusting member, the adjusting module 300 is provided with a threaded hole matched with the external thread and having an internal thread, and the mounting panel 400 is provided with a mounting hole corresponding to the threaded hole; one end of the adjusting knob penetrates through the mounting hole and the threaded hole to be connected with the adjusting piece, the adjusting knob and the threaded hole form threaded movable connection, and a part close to the other end of the adjusting knob is located on the other side of the mounting panel. For example, the adjusting knob comprises a threaded rod, and when the adjusting knob rotates, the threaded rod can advance or retreat along the thread direction, so that the adjusting piece is driven to move left and right, and the volume ratio of the first sub-inner cavity to the second sub-inner cavity is changed.
As an implementation manner of the present application, the adjusting module 300 has a first surface and a second surface opposite to each other, and a third surface and a fourth surface opposite to each other, where the first interface and the second interface are respectively disposed on the first surface and the second surface, the third interface is disposed on the fourth surface, the third surface is recessed inwards to form a accommodating space, and the balancing module 320 is disposed in the accommodating space; the two gas delivery modules 100 and 200 are respectively connected with the first surface and the second surface, and two gas outlets of the two gas delivery modules are respectively communicated with the first interface and the second interface in a sealing contact manner.
In addition, the gas adjusting device may further include an alarm module 500, where the alarm module 500 is respectively connected to the gas outlets of each of the gas delivery modules 100 and 200, and is configured to respectively measure the gas pressure values of the depressurized gas outputted from the gas outlets, and determine whether to issue an alarm according to the gas pressure values.
In each gas delivery module of the present embodiment, a pressure reducing valve 40 is included, and two ends of the pressure reducing valve 40 are respectively connected to the gas inlet and the gas outlet, and are used for reducing pressure of the gas flowing therethrough.
In order to ensure that the air pressure values output by the two air delivery modules after being decompressed are as close as possible, the structures, the adopted materials and the connection modes of the two air delivery modules and the adjusting module 300 are the same.
In the gas regulating device provided by the application, all the connecting channels are formed by arranging channels in the structure. All interfaces in each module are communicated by forming channels in the modules, and the interfaces between the modules are connected in a sealing contact manner, so that the integration level of the device is further improved, and the occupied space is reduced.
The gas regulating device does not comprise an electromagnetic valve, all connecting channels are formed by opening channels in the structure, namely, the air inlet and the air outlet of the gas transmission module and the input and output of the pressure reducing valve are communicated by opening channels in the gas transmission module, the first input port and the second input port of the balance module in the regulating module are communicated with the first interface and the second interface, the first output port and the second output port of the balance module are communicated with the first opening and the second opening of the proportional mixing module, the third opening of the proportional mixing module is communicated with the third interface, the channels are formed in the regulating module, and the air outlet of the gas transmission module is communicated with the first interface and the second interface of the regulating module in a sealing contact mode. Through the design, the gas regulating device disclosed by the application completely abandons the electromagnetic valve and the special rubber or metal connecting pipeline in the prior art, so that the gas regulating device is more compact in structure and higher in integration level.
In addition, the gas regulating device is purely pneumatic control, gas is input into the gas transmission modules through gas sources connected with the gas transmission modules, the depressurized gas output by the gas outlets of the gas transmission modules is input into the regulating modules, the balance modules of the regulating modules change the volume ratio of the first containing cavity and the second containing cavity through the balance pieces, so that the pressure balance of the two paths of gas is further realized, and the pressure difference is further reduced; the two paths of gas regulated by the balancing module enter the proportional mixing module, and the user regulates the regulating knob to drive the regulating motion, so that the volume ratio of the first inner cavity to the second inner cavity is changed, the proportion of the two paths of gas entering the inner cavity of the proportional mixing module is regulated, and the accurate regulation of the proportional mixing of the gas is realized.
In summary, the application provides a gas regulating system and a modularized gas regulating device, which are characterized in that a pressure reducing valve is arranged on each path of gas transmission unit, so that the pressure of each gas is regulated to be equal or close to that of each gas before mixing, and the problem that in the prior art, the mixing device is invalid in regulation due to the fact that the fluctuation range of the pressure of the gas provided by a factory-end gas source is large, and the gas pressure value in a certain path is too high during mixing is solved. In addition, the application further provides a balancing unit for further pressure adjustment of the depressurized gas, and prevents the phenomenon that the depressurized gas still has pressure deviation caused by the precision of the depressurization valve, the installation precision and the like, so that the influence of inaccurate adjustment of the mixing proportion caused by the pressure difference of the gas can be eliminated during mixing. In addition, the application also improves the mixing unit of the comparative example, so that an operator can realize continuous adjustment of the mixing proportion of the mixed gas only through the adjusting knob.
The gas regulating device does not contain an electromagnetic valve, and all the connecting channels are formed by arranging the channels in the structure, so that the electromagnetic valve and a special rubber or metal connecting pipeline in the prior art are completely abandoned, the structure of the gas regulating device is more compact, and the integration level is higher.
In addition, the gas regulating device is purely pneumatic control, gas is input into the gas transmission modules through gas sources connected with the gas transmission modules, the depressurized gas output by the gas outlets of the gas transmission modules is input into the regulating modules, the balance modules of the regulating modules change the volume ratio of the first containing cavity and the second containing cavity through the balance pieces, so that the pressure balance of the two paths of gas is further realized, and the pressure difference is further reduced; the two paths of gas regulated by the balancing module enter the proportional mixing module, and the user regulates the regulating knob to drive the regulating motion, so that the volume ratio of the first inner cavity to the second inner cavity is changed, the proportion of the two paths of gas entering the inner cavity of the proportional mixing module is regulated, and the accurate regulation of the proportional mixing of the gas is realized.
The above description is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the present application, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.

Claims (17)

1. A gas regulating system is characterized by comprising at least two paths of gas transmission units and a proportional mixing unit with an inner cavity,
each path of the gas transmission unit comprises an input end and an output end, the output end is communicated with the inner cavity, and the input ends are respectively communicated with a corresponding gas source;
each path of gas transmission unit is provided with a pressure reducing valve which is used for reducing pressure of gas flowing through;
the proportional mixing unit is used for carrying out proportional adjustment, mixing and output on at least two paths of gases entering the inner cavity;
the gas regulating system further comprises a balancing unit, wherein the balancing unit is arranged between the output ends of the at least two paths of gas transmission units and the proportional mixing unit and is used for balancing the pressure of the gas output by the at least two paths of gas transmission units;
the balance unit is provided with a cavity and comprises a balance piece, the balance piece is arranged in the cavity and separates the cavity into a first sub-cavity and a second sub-cavity, the first sub-cavity is provided with a first input port and a first output port, and the second sub-cavity is provided with a second input port and a second output port;
The at least two gas transmission units comprise a first gas transmission unit and a second gas transmission unit, the output end of the first gas transmission unit is communicated with a first input port, and the input end is used for being communicated with a first gas source; the output end of the second gas transmission unit is communicated with the second input port, and the input end is used for being communicated with a second gas source;
the first output port and the second output port are communicated with the inner cavity of the proportional mixing unit;
the balance piece can move to change the volume ratio of the first sub-cavity to the second sub-cavity.
2. A gas conditioning system as claimed in claim 1, wherein the ratio mixing unit adjusts the mixing ratio of the output gases by adjusting the volume ratio of the two gases entering the internal chamber.
3. The gas regulating system according to claim 1, wherein the pressure reducing valve provided in each gas delivery unit has the same structure, size, and connection manner with the gas delivery unit, and the pressure value of the gas after pressure reduction set by the pressure reducing valve is the same.
4. The gas conditioning system of claim 1, wherein the proportional mixing unit further comprises a conditioning element and a conditioning knob, the conditioning element disposed in the interior cavity and dividing the interior cavity into a first subchamber and a second subchamber that are in communication;
The proportional mixing unit is provided with three openings which are communicated with the inner cavity, namely a first opening, a second opening and a third opening;
the first output port of the balancing unit is communicated with the first opening, and the second output port is communicated with the second opening;
the gas input by the first opening flows through the first subchamber and then flows out of the third opening;
the gas input by the second opening flows through the second subchamber and then flows out of the third opening;
the adjusting knob is connected with the adjusting piece and used for driving the adjusting piece to move so as to change the volume ratio of the first sub-inner cavity to the second sub-inner cavity;
and the third opening is used for outputting the mixed gas after the proportion adjustment and the mixing.
5. A gas regulating system according to claim 4, wherein a portion of said regulating knob adjacent to one end of said regulating member has an external screw thread, said proportional mixing unit is provided with a screw hole having an internal screw thread, said regulating knob is connected to said regulating member by screw-thread movable between said external screw thread and said screw hole screw thread, and one end of said regulating knob is connected to said regulating member through said screw hole.
6. The gas regulating system according to claim 1, further comprising an alarm unit, wherein the alarm unit is respectively connected to the output end of each of the gas delivery units, and is configured to respectively measure the gas pressure values of the depressurized gas outputted from the output end, and determine whether to issue an alarm according to the gas pressure values.
7. A modularized gas regulating device is characterized by comprising two gas transmission modules and a regulating module,
each gas transmission module is used for decompressing the gas flowing through and is provided with a gas inlet and a gas outlet, the gas inlet is used for being connected with a gas source, and the gas outlet is used for outputting the decompressed gas;
the regulating module is used for carrying out proportion regulation, mixing and output on the gas entering the regulating module and is provided with three interfaces, namely a first interface, a second interface and a third interface;
the first interface and the second interface are respectively communicated with the air outlets of the two air transmission modules in a sealing contact manner, and the third interface is used for outputting mixed gas subjected to proportion adjustment and mixing;
the adjusting module comprises a proportional mixing module with an inner cavity, the three interfaces are communicated with the inner cavity, and the proportional mixing module is used for carrying out proportional adjustment, mixing and output on at least two paths of gases entering the inner cavity;
The proportional mixing module comprises an adjusting piece and an adjusting knob, wherein the adjusting piece is arranged in the inner cavity and divides the inner cavity into a first sub-inner cavity and a second sub-inner cavity which are communicated with each other;
the proportional mixing module is provided with three openings which are communicated with the inner cavity, namely a first opening, a second opening and a third opening;
the first opening and the second opening are respectively communicated with the first interface and the second interface, and the third opening is communicated with the third interface;
the gas input by the first opening flows through the first subchamber and then flows out of the third opening;
the gas input by the second opening flows through the second subchamber and then flows out of the third opening;
the adjusting knob is connected with the adjusting piece and used for driving the adjusting piece to move so as to change the volume ratio of the first sub-inner cavity to the second sub-inner cavity;
and the third opening is used for outputting the mixed gas after the proportion adjustment and the mixing.
8. The modular gas regulator of claim 7, wherein the regulator module further comprises a balancing module disposed between the two gas delivery modules and the proportional mixing module, the balancing module configured to pressure balance the two gases output from the first and second ports and input the balanced two gases into the first and second openings, respectively.
9. The modular gas regulating device of claim 8, wherein the balancing module has a cavity and includes a balancing member disposed within the cavity and separating the cavity into a first sub-cavity and a second sub-cavity, the first sub-cavity having a first input port and a first output port, the second sub-cavity having a second input port and a second output port;
the first interface is communicated with the first input port, the first output port is communicated with the first opening, the second interface is communicated with the second input port, and the second output port is communicated with the second opening;
the balance piece can move to change the volume ratio of the first sub-cavity to the second sub-cavity.
10. The modular gas regulating apparatus of claim 9, further comprising a mounting panel, wherein the regulating module and the two gas delivery modules are mounted to the mounting panel.
11. The modular gas regulator of claim 10, wherein the regulator module and the two gas delivery modules are mounted on the same side of the mounting panel, and the two gas delivery modules are symmetrically disposed on two sides of the regulator module to form a T-shaped structure.
12. The modular gas regulating device according to claim 11, wherein the portion of the regulating knob near one end of the regulating member has an external thread, the regulating module is provided with a threaded hole matched with the external thread and having an internal thread, and the mounting panel is provided with a mounting hole corresponding to the threaded hole;
one end of the adjusting knob penetrates through the mounting hole and the threaded hole to be connected with the adjusting piece, the adjusting knob is movably connected with the threaded hole in a threaded mode, and the part, close to the other end of the adjusting knob, is located on the other side of the mounting panel.
13. The modular gas regulating device of claim 11, wherein the regulating module has opposing first and second faces, and opposing third and fourth faces, the first and second interfaces being disposed on the first and second faces, respectively, the third interface being disposed on the fourth face, the third face being recessed inwardly to form a receiving space, the balancing module being disposed within the receiving space;
the two gas transmission modules are respectively connected with the first surface and the second surface, and the two gas outlets of the two gas transmission modules are respectively communicated with the first interface and the second interface in a sealing contact manner.
14. The modular gas regulating device of claim 7, further comprising an alarm module in communication with each gas outlet of the gas delivery modules, and configured to measure the pressure of the depressurized gas output from the gas outlet, and determine whether to issue an alarm based on the pressure.
15. A modular gas regulating device as claimed in claim 7, wherein each gas delivery module includes a pressure relief valve having opposite ends in communication with the gas inlet and the gas outlet, respectively, for reducing the pressure of the gas flowing therethrough.
16. A modular gas regulating apparatus according to any one of claims 7 to 15, wherein the two gas delivery modules are of the same construction, material and connection to the regulating module.
17. A modular gas regulating device according to any of claims 7-15, wherein the connection channels in the modular gas regulating device are each formed by channels open inside the modular gas regulating device.
CN201711489131.0A 2017-12-29 2017-12-29 Gas regulating system and modularized gas regulating device Active CN107913451B (en)

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CN206587608U (en) * 2017-01-24 2017-10-27 深圳沃飞科技有限公司 A kind of multicomponent gas mixing match device
CN208911207U (en) * 2017-12-29 2019-05-31 上海德尔格医疗器械有限公司 A kind of gas regulating system and modular air regulating device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2915139Y (en) * 2006-04-24 2007-06-27 王双卫 Antalgic gas inhaler
KR20110094647A (en) * 2010-02-17 2011-08-24 주식회사 멕 아이씨에스 Pneumatic block system of medical ventilator
CN202191570U (en) * 2011-08-16 2012-04-18 南京舒普思达医疗设备有限公司 Double-gas mixer
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