Pressure self-feedback type infusion bag pressurizing device

Abstract

The invention relates to a pressure self-feedback type infusion bag pressurizing device, belongs to the technical field of medical instruments, and solves the problems that in the prior art, manual inflation operation of an infusion bag pressurizing device is complex, the labor intensity is high, the attention of medical staff is distracted, or additional energy supply is needed for automatic inflation, so that the use environment is limited. The device comprises an inflation bottle assembly, a control valve and a double-layer pressurization bag, the control valve is provided with an input port and an output port, the inflation bottle assembly is connected with the input port through a pipeline, the output port is connected with the double-layer pressurization bag through a pipeline, and connection and disconnection of the input port and the output port are controlled according to the pressure of the double-layer pressurization bag; and a fluid medium in the inflating bottle assembly flows to the double-layer pressurizing bag through the control valve. The double-layer pressurization bag is inflated through the inflation bottle assembly, complex operation is not needed, and additional energy supply auxiliary equipment is not needed.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a pressure self-feedback type infusion bag pressurizing device. Background Art

[0002] Currently, the common practice for controlling pipeline pressure and requiring an automatic control method is to monitor the pipeline pressure through a PLC. When it is detected that the pipeline pressure reaches a certain value, the PLC controls the actuator motor installed on the pipeline to close the valve. When it is detected that the pipeline pressure is less than a certain value, the PLC controls the actuator motor installed on the pipeline to open the valve. Although such an implementation method is precise, it requires a large number of components, must be electrically controlled, and has a large volume, making it impossible to be installed and used in a small space. It also does not have the function of automatically connecting and disconnecting the medium in the pipeline without other driving forces.

[0003] The infusion bag pressurizing device is mainly used to externally pressurize the infusion bag to accelerate the infusion process during infusion or to maintain the blood pressure balance between the infusion bag and the human body. The principle of air pressure pressurization is: placing the infusion bag into a pressurizing bag and filling the pressurizing bag with gas, so that the pressure of the pressurizing bag presses on the infusion bag to increase the internal pressure of the infusion bag from the outside.

[0004] The currently commonly used inflation method is manual inflation, which requires manually and repeatedly squeezing the inflation bag to pump air into the air pressure bag, and requires closely monitoring the pressure gauge to avoid over-inflation to achieve the purpose of pressurizing the infusion bag. The defect of this method is that the manual inflation time is long, the operation is complex, the labor intensity is large, and it distracts the attention of medical staff. Even if there is an automatic inflation method, it also requires external energy supply, such as electric energy, and the use environment is limited, making it impossible to be used in the wild or other places without corresponding energy. Summary of the Invention

[0005] In view of the above analysis, the embodiments of the present invention aim to provide a pressure self-feedback type infusion bag pressurizing device to solve the problems of complex manual inflation operation, large labor intensity, distraction of medical staff's attention of the existing infusion bag pressurizing device, or limited use environment caused by the need for additional energy supply for automatic inflation.

[0006] The present invention provides a pressure self-feedback type infusion bag pressurizing device, including an inflation bottle assembly, a control valve, and a double-layer pressurizing bag. The control valve is provided with an input port and an output port. The inflation bottle assembly is connected to the input port through a pipeline, and the output port is connected to the double-layer pressurizing bag through a pipeline. The on-off of the input port and the output port is controlled according to the pressure of the double-layer pressurizing bag;

[0007] The fluid medium in the inflation bottle assembly flows through the control valve to the double-layer pressurizing bag.

[0008] Further, the inflatable bottle assembly includes a support frame and an inflatable bottle. The inflatable bottle is disposed within the support frame and is in communication with the input port.

[0009] Further, it further includes a protective housing, and the inflatable bottle assembly, the control valve, and the double-layer pressure bag are all disposed within the protective housing.

[0010] Further, the control valve includes a valve body, a piston, and a valve cover. The piston is disposed within the inner cavity of the valve body and is capable of sliding within the inner cavity of the valve body. The valve cover is disposed at one end of the valve body.

[0011] Further, the valve cover includes a cover plate and an annular platform. One end of the annular platform is connected to the cover plate, and the other end is provided with an external thread for connection with the valve body;

[0012] A first through hole is provided at a position adjacent to the annular platform and the cover plate. The first through hole is in communication with the inner cavity of the annular platform, and an annular gap is formed between the root of the annular platform and the inner cavity wall surface of the valve body.

[0013] Further, a second through hole is provided on the side wall of the valve body. The upper end of the second through hole is in communication with the annular gap, and the lower end of the second through hole is in communication with the output port.

[0014] Further, there is a gap between the piston and the inner cavity wall surface of the valve body; the piston includes a cylindrical portion and a top plate portion that contacts the annular platform.

[0015] Further, a first annular groove is provided at the top of the valve body, and second, third, and fourth annular grooves are provided on the side wall of the cylindrical portion from top to bottom.

[0016] Further, the control valve further includes an elastic member and an adjusting member. One end of the elastic member abuts against the piston, and the other end abuts against the adjusting member.

[0017] Further, it further includes a pressure relief safety valve, a throttle valve, a tee joint, and a pressure gauge.

[0018] Further, the inflatable bottle assembly includes an inflatable bottle, an end cap, and a thimble. The thimble is disposed within the end cap. When the inflatable bottle is docked with the end cap, the thimble pierces the inflatable bottle, and the fluid medium in the inflatable bottle flows to the double-layer pressure bag.

[0019] Further, the inflatable bottle assembly further includes a handle and a rotating shaft. The end cap and the thimble are both disposed at the same end of the support frame; one end of the handle is disposed within the support frame and is rotatably connected to the rotating shaft, and the upper end of the rotating shaft is connected to the support frame.

[0020] Further, the support frame is connected to the protective housing, the lower end of the rotating shaft is connected to the protective housing, and the other end of the handle extends out of the support frame and extends to the outside of the protective housing.

[0021] Further, an input port and an output port are provided on the side wall of the valve body, and both the input port and the output port communicate with the inner cavity of the valve body; O-ring seals are provided in the first annular groove, the second annular groove, the third annular groove, and the fourth annular groove.

[0022] Further, the end cap is connected to the inlet of the tee, one outlet of the tee is connected to the pressure relief safety valve, the other outlet of the tee is connected to the throttle valve, the throttle valve is connected to the input port, the output port is connected to the double-layer pressure bag, and the double-layer pressure bag is connected to the pressure gauge.

[0023] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0024] (1) In the present invention, the gas cylinder assembly and the double-layer pressure bag are connected through a control valve and a pipeline. The control valve is used to control the on-off of the fluid medium. When the pressure output from the control valve reaches a certain value, the fluid channel inside the control valve is disconnected, thereby closing the control pipeline and maintaining the pressure at the output port of the control valve; when the pressure at the output port of the control valve is lower than a certain value, the fluid channel inside the control valve is reopened, realizing the function of automatically connecting and disconnecting the fluid medium in the pipeline without power supply and without external energy supply; at the same time, the gas cylinder assembly automatically inflates the double-layer pressure bag, and the inflation of the double-layer pressure bag can be achieved without complicated operations, reducing the labor intensity and improving the concentration of medical staff, and no longer having to distractedly observe the pressure gauge reading.

[0025] (2) One end of the handle of the present invention is connected to the support frame through a return spring and is rotatably connected to the support frame through a rotating shaft. The bottom of the inflatable bottle contacts the end of the handle. When the other end of the handle is pulled, the handle rotates around the rotating shaft, and at the same time, the inflatable bottle is pushed towards the thimble direction. The inflatable bottle is punctured by the thimble to release the fluid medium therein. The fluid medium enters the double-layer pressurized bag to pressurize the infusion bag. While the handle rotates, the return spring is pulled to elongate. When the handle is released, the return spring retracts, and under the action of the return spring, the handle returns to its original position. Only by pulling the handle to the limit position, the inflatable bottle will be punctured by the thimble. The high-pressure gas in the inflatable bottle enters the double-layer pressurized bag under the action of pressure. The double-layer pressurized bag begins to expand. When the pressure in the double-layer pressurized bag reaches the set pressure of the control valve, the control valve automatically closes, cutting off the gas passage and maintaining the pressure in the double-layer pressurized bag. Just pulling the handle once can complete all the operations, which can greatly reduce the labor intensity of medical workers. At the same time, no external energy supply is required, and the application scenario is wide, not limited to the environment that requires energy supply.

[0026] (3) A gas cylinder sleeve is provided on the outside of the inflatable bottle of the present invention. The front end of the gas cylinder sleeve forms an annular limiting ring that sleevs on the inflatable bottle. The rear end of the gas cylinder sleeve is provided with a limiting part. A pull ring is provided on the gas cylinder sleeve. When the support frame is removed, manually pull the pull ring backward, and the gas cylinder sleeve drives the inflatable bottle to move backward synchronously, disengaging from the connection with the end cover. Then, the inflatable bottle and the gas cylinder sleeve can be taken out of the support frame together, achieving the purpose of quickly replacing the gas cylinder.

[0027] In the present invention, the above technical solutions can also be combined with each other to achieve more preferred combination schemes. Other features and advantages of the present invention will be described in the subsequent description. And some advantages can be made obvious from the description or understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained from the content specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings are only for the purpose of showing specific embodiments and are not considered to be a limitation of the present invention. Throughout the drawings, the same reference signs represent the same components.

[0029] Figure 1 One of the structural schematic diagrams of the pressure self-feedback infusion bag pressurization device for a specific embodiment;

[0030] Figure 2 Another structural schematic diagram of the pressure self-feedback infusion bag pressurization device for a specific embodiment;

[0031] Figure 3 The structural schematic diagram of the pressure self-feedback infusion bag pressurization device without the first housing for a specific embodiment;

[0032] Figure 4 Schematic diagram of the structure of the pressure self-feedback infusion bag pressurization device without the first housing and the handle for a specific embodiment;

[0033] Figure 5 Schematic diagram of the structure of the valve body for a specific embodiment;

[0034] Figure 6 One of the cross-sectional structure schematic diagrams of the valve body for a specific embodiment;

[0035] Figure 7 Another cross-sectional structure schematic diagram of the valve body for a specific embodiment;

[0036] Figure 8 Schematic diagram of the structure of the valve main body for a specific embodiment;

[0037] Figure 9 Schematic diagram of the structure of the piston for a specific embodiment;

[0038] Figure 10 Schematic diagram of the structure of the valve cap for a specific embodiment;

[0039] Figure 11 Schematic diagram of the structure of the gas filling bottle assembly for a specific embodiment;

[0040] Figure 12 One of the structure schematic diagrams of the support frame for a specific embodiment;

[0041] Figure 13 Another structure schematic diagram of the support frame for a specific embodiment;

[0042] Figure 14 One of the structure schematic diagrams of the end cap for a specific embodiment;

[0043] Figure 15 Another structure schematic diagram of the end cap for a specific embodiment;

[0044] Figure 16 Schematic diagram of the position of the thimble and the pipe joint for a specific embodiment;

[0045] Figure 17 Schematic diagram of the positions of the pipe joint, the end cap, the gas filling bottle and the handle for a specific embodiment;

[0046] Figure 18 Schematic diagram of the positions of the pipe joint, the thimble, the gas filling bottle and the handle for a specific embodiment;

[0047] Figure 19 Schematic diagram of the positions of the gas filling bottle and the handle for a specific embodiment;

[0048] Figure 20 Schematic diagram of the structure of the sliding assembly for a specific embodiment;

[0049] Figure 21 One of the schematic diagrams of the connection structure of the quick-change gas cylinder assembly, support frame and inflatable gas cylinder for a specific embodiment;

[0050] Figure 22 Another schematic diagram of the connection structure of the quick-change gas cylinder assembly, support frame and inflatable gas cylinder for a specific embodiment;

[0051] Figure 23 Schematic diagram of the connection structure of the quick-change gas cylinder assembly and the inflatable gas cylinder for a specific embodiment;

[0052] Figure 24 One of the schematic diagrams of the structure of the gas cylinder sleeve for a specific embodiment;

[0053] Figure 25 Another schematic diagram of the structure of the gas cylinder sleeve for a specific embodiment;

[0054] Figure 26 Schematic diagram of the structure of the support frame for a specific embodiment.

[0055] Reference numerals:

[0056] 1 - Inflatable gas cylinder assembly; 11 - Support frame; 111 - Communication hole; 112 - First slot; 113 - Second slot; 12 - Inflatable gas cylinder; 121 - Hemispherical part; 13 - End cover; 131 - Connecting boss; 1311 - First hole; 1312 - Second hole; 1313 - Annular sealing groove; 132 - Connecting plate; 1321 - Third hole; 14 - Thumb latch; 141 - Spiral groove; 15 - Pipe joint; 16 - Handle; 161 - Arc surface; 162 - First arc groove; 163 - Connecting hole; 17 - Return spring; 18 - Rotating shaft;

[0057] 2 - Control valve; 21 - Valve body; 211 - Input port; 212 - Output port; 213 - First annular groove; 214 - Second through hole; 215 - Threaded hole; 216 - Third through hole; 22 - Piston; 221 - Top plate part; 2211 - Connecting protrusion; 222 - Cylindrical part; 2221 - Second annular groove; 2222 - Third annular groove; 2223 - Fourth annular groove; 23 - Valve cover; 231 - Cover plate; 232 - Annular platform; 2321 - First through hole; 233 - Annular gap; 24 - O-ring; 25 - Elastic member; 26 - Adjusting member;

[0058] 3 - Double - layer pressurized bag; 4 - Protective housing; 41 - First housing; 42 - Second housing; 43 - First chamber; 44 - Second chamber; 45 - First oblong hole; 46 - Second oblong hole; 47 - Groove; 48 - Out - extending hole; 49 - Hanging ear; 5 - Pressure relief safety valve; 6 - Throttle valve; 7 - Three - way joint; 8 - Pressure gauge; 9 - Sliding assembly; 91 - Ring bracket; 92 - Ball; 10 - Quick - change gas cylinder assembly; 101 - Gas cylinder sleeve; 102 - Support frame; 103 - Sleeve body; 104 - Pull ring; 105 - Placement groove; 106 - Limiting part; 107 - Limiting ring; 108 - Elastic arm; 109 - Second arc - shaped groove; 110 - Groove space; 100 - Infusion bag. Detailed implementation manners

[0059] The following will specifically describe the preferred embodiments of the present invention with reference to the accompanying drawings. The accompanying drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principle of the present invention, rather than to limit the scope of the present invention.

[0060] Embodiment 1

[0061] A specific embodiment of the present invention, in combination with Figure 3 、 Figure 4 and Figure 5 as shown, discloses a pressure self - feedback type infusion bag pressurization device, including an inflatable bottle assembly 1, a control valve 2, and a double - layer pressurized bag 3. The control valve 2 is provided with an input port 211 and an output port 212. The inflatable bottle assembly 1 is connected to the input port 211 of the control valve 2 through a pipeline and can convey a fluid medium to the control valve 2. The output port 212 of the control valve 2 is connected to the double - layer pressurized bag 3 through a pipeline. The fluid medium of the inflatable bottle assembly 1 can flow to the double - layer pressurized bag 3 through the control valve 2, and the on - off of the input port 211 and the output port 212 is controlled according to the pressure of the double - layer pressurized bag 3.

[0062] Compared with the prior art, the pressure self - feedback type infusion bag pressurization device provided in this embodiment connects the inflatable bottle assembly 1 and the double - layer pressurized bag 3 through the control valve 2 and the pipeline. The control valve 2 is used to control the on - off of the fluid medium. When the pressure output from the control valve 2 reaches a certain value, the internal fluid channel of the control valve 2 is disconnected, thereby closing the control pipeline and maintaining the pressure at the output port 212 of the control valve 2. When the pressure at the output port 212 of the control valve 2 is lower than a certain value, the internal fluid channel of the control valve 2 is reopened, realizing the function of automatically connecting and truncating the fluid medium in the pipeline without power supply and without external energy supply. At the same time, the inflatable bottle assembly 1 automatically inflates the double - layer pressurized bag 3, and the inflation of the double - layer pressurized bag 3 can be realized without complex operations, reducing the labor intensity and improving the concentration of medical staff, without having to distractedly observe the pressure gauge reading.

[0063] In combination with Figure 5 、 Figure 6and Figure 7 As shown in Figure 7 , the control valve 2 includes a valve body 21, a piston 22 and a valve cover 23. The valve body 21 is preferably a cylindrical structure with a bottom. The piston 22 is arranged in the inner cavity of the valve body 21 and can slide up and down in the inner cavity of the valve body 21. The valve cover 23 is arranged at one end of the valve body 21, such as the top. The input port 211 and the output port 212 as described above are arranged on the side wall of the valve body 21, and both the input port 211 and the output port 212 are communicated with the inner cavity of the valve body 21. The input port 211 and the output port 212 can be collinear or non - collinear, that is, the input port 211 and the output port 212 are arranged at the same height or have a height difference in the height direction of the side wall of the valve body 21. Preferably, the input port 211 and the output port 212 are not arranged at the same height.

[0064] Considering that there will be fluid passing through the control valve 2, in order to enhance the sealing effect of the control valve 2, as Figure 8 shown in Figure 8 , a first annular groove 213 is arranged at the top of the valve body 21, and the first annular groove 213 is concentric with the inner cavity of the valve body 21. An internal thread is arranged at the top of the inner cavity of the valve body 21, and the valve cover 23 is thread - connected with the valve body 21. Through the thread connection, the valve body 21 and the valve cover 23 can form a good sealing effect.

[0065] As Figure 10 shown in Figure 10 , the valve cover 23 is a rotary body structure, including a cover plate 231 and an annular platform 232. The annular platform 232 is arranged at the bottom of the cover plate 231. One end of the annular platform 232 is connected to the cover plate 231, and the other end is provided with an external thread for connecting with the valve body 21. A plurality of first through - holes 2321 are arranged at a position adjacent to the annular platform 232 and the cover plate 231. The plurality of first through - holes 2321 are circumferentially and uniformly distributed around the central axis of the annular platform 232. In other words, a plurality of first through - holes 2321 are uniformly arranged at the root of the annular platform 232. The first through - holes 2321 are communicated with the inner cavity of the annular platform 232. It should be noted that the cover plate 231 and the annular platform 232 are integrally formed.

[0066] It is worth noting that the diameter of the position where the first through - holes 2321 are arranged is smaller than the diameter of the position where the external thread is arranged. That is, the annular platform 232 is a stepped platform with two steps. The first through - holes 2321 are arranged on the first step, and the external thread is arranged on the second step. The diameter of the first step is smaller than the diameter of the second step.

[0067] In this embodiment, as Figure 6 shown in Figure 6 , the annular platform 232 is a stepped platform, and the diameter of the part close to the cover plate 231 is smaller than the diameter of the part where the external thread is arranged. When the valve cover 23 is connected to the valve body 21, an annular gap 233 is formed between the part close to the cover plate 231 and the inner cavity wall surface of the valve body 21.

[0068] In order to enable the fluid medium at the outlet 212 of the valve body 21 to enter the inner cavity of the annular platform 232 of the valve cover 23, as Figure 8 shown, a second through hole 214 is provided on the side wall of the valve body 21. The upper end of the second through hole 214 communicates with the annular gap 233, and the lower end of the second through hole 214 communicates with the outlet 212.

[0069] Combined with Figure 6 、 Figure 7 and Figure 9 shown, the piston 22 is also a rotary body member. In order to enable the fluid medium to flow from the inlet 211 to the outlet 212, the diameter of the piston 22 is smaller than the inner cavity diameter of the valve body 21. In other words, there is a gap between the piston 22 and the wall surface of the inner cavity of the valve body 21. The piston 22 includes a top plate portion 221 in contact with the annular platform 232 and a cylindrical portion 222. The top plate portion 221 is a disc-shaped structure and is provided at one end of the cylindrical portion 222. It should be noted that the top plate portion 221 and the cylindrical portion 222 are integrally formed.

[0070] Considering that the piston 22 seals with the wall surface of the inner cavity of the valve body 21 to form a flow channel for the fluid medium and can realize the on-off control of the flow channel, as Figure 9 shown, a second annular groove 2221, a third annular groove 2222 and a fourth annular groove 2223 are provided on the side wall of the cylindrical portion 222. The second annular groove 2221, the third annular groove 2222 and the fourth annular groove 2223 are arranged in sequence from the top of the piston 22 downwards. O-ring seals 24 are provided in the first annular groove 213, the second annular groove 2221, the third annular groove 2222 and the fourth annular groove 2223. It should be noted that the O-ring seals 24 in the second annular groove 2221, the third annular groove 2222 and the fourth annular groove 2223 move up and down synchronously with the piston 22. The O-ring seals 24 in the second annular groove 2221, the third annular groove 2222 and the fourth annular groove 2223 form a sliding seal structure with the wall surface of the inner cavity of the valve body 21.

[0071] In order to realize the up and down movement of the piston 22 in the inner cavity of the valve body 21, combined with Figure 5 、 Figure 6 and Figure 7As shown, the control valve 2 further includes an elastic member 25 and an adjusting member 26. One end of the elastic member 25 abuts against the piston 22, and the other end abuts against the adjusting member 26. The adjusting member 26 is threadedly connected to the bottom end of the valve body 21. Understandably, a threaded hole 215 connected to the adjusting member 26 is provided at the bottom of the valve body 21. For the convenience of connecting the elastic member 25, a connecting protrusion 2211 is provided on the top plate portion 221. The connecting protrusion 2211 extends from the top plate portion 221 towards the cylindrical portion 222, and one end of the elastic member 25 is sleeved on the connecting protrusion 2211. Preferably, the elastic member 25 is a spring. The adjusting member 26 is a screw or bolt with a conical head. One end of the adjusting member 26 is a conical portion that abuts against the elastic member 25, and the other end is provided with an external thread that mates with the threaded hole 215 at the bottom of the valve body 21.

[0072] It should be noted that the number of the elastic members 25 is not limited to only one, and multiple elastic members 25 can also be used. The number of the elastic members 25 corresponds to the connecting protrusions 2211. At the same time, the elastic members 25 are not limited to being arranged on one side of the piston 22. One or more elastic members 25 can also be arranged on both sides of the piston 22 respectively, and can be adjusted as a whole or separately. Exemplarily, if the elastic member 25 is connected to one adjusting member 26, it can be adjusted as a whole; if the elastic members 25 respectively correspond to one adjusting member 26, they can be adjusted separately. The fixation of the elastic member 25 is not limited to the convex platform and the conical protrusion, and can also be a groove or a combination of a convex platform and a groove.

[0073] In this embodiment, by adjusting the height of the adjusting member 26, the pressure of the elastic member 25 is adjusted so that the output pressure is adjusted to a certain value A. The input port 211 and the output port 212 are connected in series to the pipeline to be controlled. When the fluid medium flows in from the input port 211, it flows out from the output port 212 through the gap between the piston 22 and the valve body 21. At the same time, it will also flow into the inner cavity of the annular platform 232 along the second through hole 214 and the first through hole 2321 of the valve cover 23. When the output pressure reaches a certain value A, as the fluid medium continues to flow in, the piston 22 gradually moves downward against the pressure of the elastic member 25. When the piston 22 moves downward to the defined position, the O-ring 24 in the third annular groove 2222 of the piston 22 is exactly located between the input port 211 and the output port 212, blocking the fluid channel between the input port 211 and the output port 212, thereby closing the control pipeline and maintaining the pressure of the output port 212. When the pressure of the output port 212 is lower than a certain value A, the elastic member 25 pushes the piston 22 to gradually reset, and the O-ring 24 in the third annular groove 2222 on the piston 22 moves upward above the input port 211, reopening the fluid channel between the input port 211 and the output port 212. In this way, the self-feedback mode of the pressure of the output port 212 is satisfied, and the function of automatically connecting and cutting off the fluid medium in the pipeline without power is realized.

[0074] It should be noted that, asFigure 8 As shown, a third through-hole 216 is further provided at the bottom of the valve body 21, and the third through-hole 216 is provided beside the threaded hole 215. Preferably, there are two third through-holes 216, and the two third through-holes 216 are respectively located on both sides of the threaded hole 215 and are symmetrical about the threaded hole 215.

[0075] Combined with Figure 11 、 Figure 17 and Figure 18 As shown, the gas filling bottle assembly 1 includes a support frame 11, a gas filling bottle 12, an end cap 13, a thimble 14 and a pipe joint 15. The gas filling bottle 12 is arranged in the support frame 11, and the end cap 13, the thimble 14 and the pipe joint 15 are all arranged at the same end of the support frame 11. Combined with Figure 12 and Figure 13 As shown, the support frame 11 is provided with a communication hole 111, and the communication hole 111 penetrates the length direction of the support frame 11. The gas filling bottle 12 is arranged in the communication hole 111 and is arranged close to the thimble 14. The end cap 13 is arranged at one end of the communication hole 111 and is connected to the support frame 11. Exemplarily, the end cap 13 is connected to the support frame 11 by screws. The thimble 14 is arranged in the end cap 13, and both ends of the thimble 14 are respectively abutted against the bottle mouth of the gas filling bottle 12 and the pipe joint 15.

[0076] In this embodiment, a gas filling bottle 12 is arranged in the support frame 11, and the gas filling bottle 12 supplies gas to the double-layer pressure bag 3, without the need for an external gas supply device or a manual pump pressure tool, and is more suitable for use under the condition of no external energy supply device.

[0077] Combined with Figure 11 、 Figure 13 、 Figure 14 and Figure 15 As shown, one end of the end cap 13 is provided with a connecting boss 131 and the other end is provided with a connecting plate 132, and the connecting plate 132 is connected to the support frame 11. A first hole 1311 and a second hole 1312 are arranged along the axis direction of the connecting boss 131. The diameter of the first hole 1311 is larger than the diameter of the second hole 1312. The diameter of the first hole 1311 is equal to the nozzle of the gas filling bottle 12. The thimble 14 is arranged in the second hole 1312, and the front end of the thimble 14 extends into the first hole 1311. Since the rear end of the thimble 14 is limited by the pipe joint 15 and the front end of the thimble 14 extends into the first hole 1311, when the gas filling bottle 12 is moved, the nozzle of the gas filling bottle 12 can be docked with the first hole 1311 of the end cap 13, and the sealing film of the nozzle of the gas filling bottle 12 can be punctured by using the thimble 14, so that the fluid medium in the gas filling bottle 12 flows into the pipe joint 15 through the first hole 1311 and the second hole 1312.

[0078] In order to prevent the fluid medium from leaking between the side wall of the first hole 1311 and the gas filling bottle 12, as Figure 14As shown, an annular sealing groove 1313 is provided on the side wall of the first hole 1311. Preferably, there are two annular sealing grooves 1313, and an O-ring 24 is provided in the annular sealing groove 1313. When the gas filling bottle 12 is docked with the first hole 1311, the O-ring 24 provided in the annular sealing groove 1313 is in close contact with the outer wall of the gas filling bottle 12 to achieve sealing. A third hole 1321 is provided on the connecting plate 132, and the diameter of the third hole 1321 is larger than the diameter of the second hole 1312. One end of the pipe joint 15 passes through the third hole 1321 and is threadedly connected to the second hole 1312.

[0079] Considering that the thimble 14 is provided in the second hole 1312, and when the thimble 14 pierces the gas filling bottle 12, the fluid medium in the gas filling bottle 12 needs to be transported through the second hole 1312 into the pipe joint 15. Therefore, the thimble 14 cannot obstruct the communication function of the second hole 1312. In order to enable the fluid medium in the gas filling bottle 12 to flow smoothly into the pipe joint 15, as Figure 16 shown, a spiral groove 141 is provided along the length direction of the thimble 14. After the thimble 14 pierces the gas filling bottle 12, the fluid medium in the gas filling bottle 12 enters the pipe joint 15 through the spiral groove 141.

[0080] In order to realize the movement of the gas filling bottle 12 within the support frame 11 so that the thimble 14 can pierce the gas filling bottle 12 to allow the fluid medium inside it to flow out, in combination with Figure 1 、 Figure 2 、 Figure 3 and Figure 11 shown, the gas filling bottle assembly 1 further includes a handle 16, a return spring 17 and a rotating shaft 18. One end of the handle 16 is provided within the support frame 11 and is rotatably connected to the rotating shaft 18. The upper end of the rotating shaft 18 is connected to the handle 16 and the support frame 11. In combination with Figure 11 、 Figure 12 and Figure 13 shown, the support frame 11 is provided with a first slot hole 112 and a second slot hole 113. Both the first slot hole 112 and the second slot hole 113 are communicated with the communication hole 111. The first slot hole 112 and the second slot hole 113 are respectively provided on two parallel side walls of the support frame 11. The return spring 17 is provided at the second slot hole 113. One end of the return spring 17 is connected to the support frame 11, and the other end is connected to the end of the handle 16.

[0081] In this embodiment, one end of the handle 16 is connected to the support frame 11 through a return spring 17 and is rotatably connected to the support frame 11 through a rotating shaft 18. The bottom of the inflatable bottle 12 contacts the end of the handle 16. When the other end of the handle 16 is pulled, the handle 16 rotates around the rotating shaft 18, and at the same time, the inflatable bottle 12 is pushed towards the thimble 14. The thimble 14 is used to pierce the inflatable bottle 12 to release the fluid medium inside it. The fluid medium enters the double-layer pressure bag 3 to pressurize the infusion bag 100. While the handle 16 rotates, the return spring 17 is pulled to elongate. When the handle 16 is released, the return spring 17 retracts, and under the action of the return spring 17, the handle 16 returns to its original position.

[0082] In this embodiment, only by pulling the handle 16 to the extreme position, the inflatable bottle 12 will be pierced by the thimble 14. Under the action of pressure, the high-pressure gas in the inflatable bottle 12 enters the double-layer pressure bag 3 through the control valve 2, and the double-layer pressure bag 3 begins to expand. When the pressure in the double-layer pressure bag 3 reaches the set pressure of the control valve 2, the control valve 2 automatically closes to cut off the gas passage and maintain the pressure in the double-layer pressure bag 3. Only by pulling the handle 16 once can all operations be completed. This can greatly reduce the labor intensity of medical staff and reduce the distraction of their attention; at the same time, it does not require external energy supply, has a wide range of application scenarios, and is not limited to environments that require energy supply.

[0083] Considering that the handle 16 will push the inflatable bottle 12 towards the thimble 14 during rotation, in order to better cooperate with the forward movement of the inflatable bottle 12, as shown in Figure 17 、 Figure 18 and Figure 19 the bottom of the inflatable bottle 12 is a hollow hemispherical part 121, and the end of the handle 16 is provided with an arc surface 161. A first arc groove 162 that cooperates with the bottom of the inflatable bottle 12 is provided on the arc surface 161. When the handle 16 is pulled, the handle 16 rotates around the rotating shaft 18, and the bottom of the inflatable bottle 12 slides in the first arc groove 162, making the pulling operation easy to complete.

[0084] In order to connect with the return spring 17, as shown in Figure 11 and Figure 19 a connection hole 163 is also provided at the end of the handle 16. One end of the return spring 17 is hooked to the support frame 11, and the other end is hooked to the connection hole 163 on the handle 16.

[0085] As shown in Figure 3 and Figure 4As shown, the pressure self-feedback type infusion bag pressurizing device further includes a pressure relief safety valve 5, a throttle valve 6, a tee 7 and a pressure gauge 8, and the pressure relief safety valve 5, the throttle valve 6, the tee 7 and the pressure gauge 8 are all arranged in the second chamber 44. Specifically, the pipeline joint 15 is connected to an inlet of the tee 7 through a connecting pipe, an outlet of the tee 7 is connected to the pressure relief safety valve 5 through a connecting pipe, another outlet of the tee 7 is connected to the throttle valve 6 through a connecting pipe, the throttle valve 6 is connected to the input port 211 of the control valve 2 through a connecting pipe, the output port 212 of the control valve 2 is connected to the double-layer pressurizing bag 3 through a connecting pipe, and the double-layer pressurizing bag 3 is connected to the pressure gauge 8 through a connecting pipe. One end of the pressure gauge 8 is arranged on the top of the control valve 2. Exemplarily, when the pressure gauge 8 is below the set pressure value for a long time, the gas volume in the gas filling bottle 12 may be insufficient and the gas filling bottle 12 needs to be replaced.

[0086] In this embodiment, after the high-pressure gas is discharged from the gas filling bottle 12, it passes through the tee 7 and the connecting pipe and is connected to the pressure relief safety valve 5 and the throttle valve 6. When the gas (fluid medium) is released, due to insufficient pressure, the pressure relief safety valve 5 is in a closed state. The throttle valve 6 controls the inflation speed of the high-pressure gas within a reasonable range. The high-pressure gas passes through the exhaust port of the throttle valve 6 and is connected to the control valve 2 through a connecting pipe, and the control valve 2 is also connected to the double-layer pressurizing bag 3 through a connecting pipe. By adjusting the adjusting member 26, the air pressure output from the output port 212 is the pressure required by the double-layer pressurizing bag 3. When the pressure of the high-pressure gas in the double-layer pressurizing bag 3 reaches the pressure set by the control valve 2, the gas pressure is conducted to the piston 22 in the control valve 2 in a positive feedback manner, pushing the piston 22 to move, thereby closing the gas passage and maintaining the pressure in the double-layer pressurizing bag 3. The double-layer pressurizing bag 3 is further connected to the pressure gauge 8 through a connecting pipe, and the pressure gauge 8 can check and confirm at any time whether the pressure in the double-layer pressurizing bag 3 meets the requirements.

[0087] Embodiment 2

[0088] Another specific embodiment of the present invention, in combination with Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, a pressure self-feedback type infusion bag pressurization device is disclosed. On the basis of Embodiment 1, a protective housing 4 is added, and the inflatable bottle assembly 1, the control valve 2, and the double-layer pressurization bag 3 are all arranged in the protective housing 4. The protective housing 4 includes a first housing 41 and a second housing 42. After the first housing 41 and the second housing 42 are buckled, a first chamber 43 for arranging the double-layer pressurization bag 3 and a second chamber 44 for arranging other components (such as the inflatable bottle assembly 1, the control valve 2, etc.) are formed. After the first housing 41 and the second housing 42 are buckled, a first long circular hole 45 and a second long circular hole 46 are formed. The first long circular hole 45 and the second long circular hole 46 are respectively located on two parallel side surfaces of the protective housing 4. In order to save space, a groove 47 for arranging the handle 16 is provided on the protective housing 4, and an extension hole 48 for the handle 16 is provided at the groove 47. In order to facilitate the placement of the device, a hanging ear 49 is provided on the second housing 42, and the hanging ear 49 is arranged close to the second long circular hole 46. The protective housing 4 is flat. The added protective housing 4 in this embodiment provides support and protection for the internal components, and the flat protective housing 4 makes the pressurization device more convenient for storage and transportation.

[0089] Combined with Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the support frame 11 is connected to the protective housing 4, the lower end of the rotating shaft 18 is connected to the protective housing 4, one end of the handle 16 is arranged in the support frame 11 and is rotatably connected to the rotating shaft 18, and the other end of the handle 16 extends out of the support frame 11 and extends to the outside of the protective housing 4 for the user to operate. One end of the pressure gauge 8 is arranged on the top of the control valve 2, and the other end is arranged in a hole on the first housing 41, so that the reading of the pressure gauge 8 can be seen from the outside of the protective housing 4 to judge the pressure of the double-layer pressurization bag 3 and the gas volume in the inflatable bottle 12.

[0090] Embodiment 3

[0091] Another specific embodiment of the present invention, as Figure 20 shown, discloses a pressure self-feedback type infusion bag pressurization device. The difference from Embodiment 1 is that sliding components 9 are arranged on the side wall of the communication hole 111. At least two groups of sliding components 9 are provided, which are respectively located at both ends of the bottle body of the inflatable bottle 12. The sliding component 9 includes an annular bracket 91 and a ball 92. The annular bracket 91 is connected to the inner wall of the communication hole 111. Exemplarily, it is connected through a connecting column. There is a gap between the annular bracket 91 and the inner wall of the communication hole 111 to avoid interfering with the movement of the ball 92. The balls 92 are evenly arranged along the circumferential direction of the annular bracket 91. The balls 92 can freely rotate on the annular bracket 91, and the balls 92 are in contact with the outer surface of the inflatable bottle 12.

[0092] In this embodiment, a sliding assembly 9 is provided in the connecting hole 111 of the bracket frame 11. The sliding assembly 9 includes an annular bracket 91 and a ball 92. The ball 92 is located in the annular bracket 91 and rotates freely and contacts the outer wall of the bottle body of the gas bottle 12. When the handle 16 is pulled, the gas bottle 12 moves toward the ejector pin 14 by the rotation of the ball 92. This structure is more conducive to the movement of the gas bottle 12 and saves more effort.

[0093] Example 4

[0094] Another specific embodiment of the present invention, combined with Figure 3 , Figure 21 , Figure 22 and Figure 23 As shown, a pressure self-feedback infusion bag pressurizing device is disclosed. In order to facilitate the replacement of the gas cylinder 12, a gas cylinder quick-change assembly 10 is added on the basis of Example 2. The gas cylinder quick-change assembly 10 includes a gas cylinder cover 101 and a support frame 102. The gas cylinder cover 101 is connected to the gas cylinder 12, one end of the support frame 102 is connected to the gas cylinder cover 101, and the other end is connected to the second shell 42.

[0095] Combination Figure 23 , Figure 24 and Figure 25 As shown, the gas cylinder sleeve 101 includes a sleeve body 103 and a pull ring 104, the pull ring 104 is connected to the sleeve body 103, the sleeve body 103 is provided with a placement groove 105, the gas bottle 12 is arranged in the placement groove 105, the rear part of the sleeve body 103 is provided with a limiting portion 106, the inner side of the limiting portion 106 is an arc-shaped groove, and contacts the bottom of the gas bottle 12, the outer side of the limiting portion 106 is an arc-shaped protrusion, and contacts the first arc groove 162 of the handle 16, and the front end of the sleeve body 103 is provided with a limiting ring 107, the limiting ring 107 is used to limit the bottle shoulder of the gas bottle 12, when the gas bottle 12 is placed, the bottle mouth of the gas bottle 12 is first inserted from the limiting ring 107, and then the rear end of the gas bottle 12 is pressed into the placement groove 105, and the limiting portion 106 is used to press against the bottom of the gas bottle 12.

[0096] In order to further ensure the sealing reliability of the connection between the gas filling bottle 12 and the end cover 13, as shown in FIG. Figure 24 and Figure 25 As shown, an elastic arm 108 is provided at the bottom of the sleeve 103, one end of the elastic arm 108 is connected to the lower end of the middle area of ​​the sleeve 103, and the other end extends away from the sleeve 103. When the gas bottle 12 is docked with the end cover 13 (i.e., the gas filling connection is achieved), the elastic arm 108 abuts against the support frame 102 to limit the position. It can be understood that, as Figure 26 As shown, a second arc groove 109 is provided at the end of the support frame 102 , the cylinder sleeve 101 is placed in the second arc groove 109 , the support frame 102 is provided with a groove space 110 , and the pull ring 104 is arranged in the groove space 110 .

[0097] In this embodiment, a gas cylinder cover 101 is provided on the outer side of the inflatable bottle 12, and the front end of the gas cylinder cover 101 forms an annular limiting ring 107 which is sleeved on the inflatable bottle 12, and the rear end of the gas cylinder cover 101 is provided with a limiting portion 106, and a pull ring 104 is provided on the gas cylinder cover 101. When the support frame 102 is removed, the pull ring 104 is manually pulled backwards, and the gas cylinder cover 101 drives the inflatable bottle 12 to move backward synchronously and break away from the connection with the end cover 13. Then, the inflatable bottle 12 and the gas cylinder cover 101 can be taken out of the bracket frame 11 together, so as to achieve the purpose of quickly replacing the gas cylinder. An elastic arm 108 is provided on the gas cylinder sleeve 101. During operation, the handle 16 pushes the gas bottle 12 to the working position, and the ejector pin 14 pierces the gas bottle 12. After the high-pressure gas in the gas bottle 12 is released, high-pressure gas will be formed in the pipeline. The high-pressure gas also generates a backward thrust on the gas bottle 12. At this time, the elastic arm 108 will be supported by the support frame 102, so that the neck of the gas bottle 12 will not fall off the O-ring 24, further ensuring that there will be no leakage at the connection between the gas bottle 12 and the end cover 13.

[0098] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A pressure self-feedback infusion bag pressurizing device, characterized in that: It comprises an air filling bottle assembly (1), a control valve (2) and a double-layer pressurized bag (3); The control valve (2) is provided with an input port (211) and an output port (212); the gas bottle assembly (1) is connected to the input port (211) via a pipeline; the output port (212) is connected to the double-layer pressurized bag (3) via a pipeline; the input port (211) and the output port (212) are controlled to be open or closed according to the pressure of the double-layer pressurized bag (3); the fluid medium in the gas bottle assembly (1) flows to the double-layer pressurized bag (3) through the control valve (2).

2. The pressure self-feedback infusion bag pressurizing device according to claim 1, characterized in that: The gas-filling bottle assembly (1) comprises a support frame (11) and a gas-filling bottle (12); the gas-filling bottle (12) is arranged in the support frame (11); and the gas-filling bottle (12) is in communication with the input port (211).

3. The pressure self-feedback infusion bag pressurizing device according to claim 1, characterized in that: It also comprises a protective shell (4), wherein the gas filling bottle assembly (1), the control valve (2) and the double-layer pressurized bag (3) are all arranged in the protective shell (4).

4. The pressure self-feedback infusion bag pressurizing device according to any one of claims 1 to 3, characterized in that: The control valve (2) comprises a valve body (21), a piston (22) and a valve cover (23); the piston (22) is arranged in the inner cavity of the valve body (21) and is capable of sliding in the inner cavity of the valve body (21); and the valve cover (23) is arranged at one end of the valve body (21).

5. The pressure self-feedback infusion bag pressurizing device according to claim 4, characterized in that: The valve cover (23) comprises a cover plate (231) and an annular platform (232); one end of the annular platform (232) is connected to the cover plate (231), and the other end is provided with an external thread connected to the valve body (21); A first through hole (2321) is provided at a position adjacent to the annular platform (232) and the cover plate (231); the first through hole (2321) is communicated with the inner cavity of the annular platform (232); and an annular gap (233) is formed between the root of the annular platform (232) and the inner cavity wall surface of the valve body (21).

6. The pressure self-feedback infusion bag pressurizing device according to claim 5, characterized in that: A second through hole (214) is provided on the side wall of the valve body (21), the upper end of the second through hole (214) is communicated with the annular gap (233), and the lower end of the second through hole (214) is communicated with the output port (212).

7. The pressure self-feedback infusion bag pressurizing device according to claim 5, characterized in that: There is a gap between the piston (22) and the wall surface of the inner cavity of the valve body (21); the piston (22) includes a cylindrical portion (222) and a top plate portion (221) in contact with the annular platform (232).

8. The pressure self-feedback infusion bag pressurizing device according to claim 7, characterized in that: The top of the valve body (21) is provided with a first annular groove (213), and the side wall of the cylindrical portion (222) is provided with a second annular groove (2221), a third annular groove (2222) and a fourth annular groove (2223) from top to bottom.

9. The pressure self-feedback infusion bag pressurizing device according to claim 4, characterized in that: The control valve (2) further comprises an elastic member (25) and an adjusting member (26); one end of the elastic member (25) abuts against the piston (22), and the other end abuts against the adjusting member (26).

10. The pressure self-feedback infusion bag pressurizing device according to any one of claims 1-3 and 5-9, characterized in that: It also includes a pressure relief safety valve (5), a throttle valve (6), a three-way valve (7) and a pressure gauge (8).

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