Multifunctional infusion device for emergency rescue

Abstract

The invention discloses a multifunctional infusion device for emergency rescue, and belongs to the technical field of medical instruments. Comprising a multifunctional end, a liquid storage bottle and an infusion tube, the multifunctional end comprises a first piston cylinder, a first piston is arranged in the first piston cylinder, and a first spring is arranged between the first piston and the upper end of the first piston cylinder; the two ends of the first spring are fixedly connected to the inner side faces of the ends of the first piston and the first piston cylinder correspondingly, a first piston rod is arranged in the middle of the surface, provided with the first spring, of the first piston, and one end of the first piston rod is rotationally connected to the first piston. The other end of the first piston rod penetrates out of a through hole formed in the end of the first piston cylinder, grooves are symmetrically formed in the first piston rod, and protruding blocks corresponding to the grooves in position are arranged in the through hole formed in the end of the first piston cylinder. According to the technical scheme, the problems that in the prior art, an infusion device is single in function, and the use requirement during field rescue is difficult to meet are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a multifunctional infusion device for emergency rescue. Background Art

[0002] In the field, timely hemostasis and rapid blood transfusion and infusion are important means of first aid for trauma. Rapid infusion of drugs (balanced fluid) and blood is the most effective way to correct hemorrhagic shock, which can significantly improve the success rate of trauma treatment. Therefore, large-scale, rapid pressurized blood transfusion and fluid infusion are particularly important.

[0003] The infusion device in the prior art usually uses the pressure in the infusion bottle and hangs the infusion bottle high to slowly deliver the medicine to the patient's body during infusion. However, this infusion device is difficult to meet the demand for rapid infusion during field rescue. In addition, the infusion device in the prior art has a single function and can only perform infusion operations, which is inconvenient to use in actual rescue. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a multifunctional infusion device for emergency rescue, so as to solve the problem that the infusion device in the prior art has a single function and is difficult to meet the use requirements during field rescue.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention discloses a multifunctional infusion device for emergency rescue, comprising a multifunctional terminal, a liquid storage bottle and an infusion tube connected in sequence, wherein the multifunctional terminal comprises a first piston cylinder, a first piston is arranged inside the first piston cylinder, a first spring is arranged between the first piston and the inner wall of the upper end of the first piston cylinder, the two ends of the first spring are respectively fixedly connected to the first piston and the inner side surface of the end of the first piston cylinder, a first piston rod is arranged in the middle of the surface of the first piston where the first spring is arranged, one end of the first piston rod is rotatably connected to the first piston, the other end of the first piston rod passes through a through hole arranged at the end of the first piston cylinder, and the The first piston rod is symmetrically provided with grooves, and a protrusion corresponding to the position of the groove is provided in the through hole provided on the end of the first piston cylinder, and the protrusion is slidably connected in the groove, a lower limiting groove is provided on the part of the first piston rod located in the first piston cylinder, and an upper limiting groove is provided on the part of the first piston rod located outside the first piston cylinder, and a plug-in tube is provided in the middle part of the lower end surface of the first piston cylinder, one end of the plug-in tube is fixedly connected to the end of the first piston cylinder and communicated with the interior of the first piston cylinder, the other end of the plug-in tube is plugged into the interior of one end of the liquid storage bottle, and one end of the infusion tube is plugged into the interior of the other end of the liquid storage bottle.

[0007] Furthermore, a gas channel is provided through the middle part of the first piston and the middle part of the first piston rod, a pull rod is provided in the gas channel, the diameter of the pull rod is smaller than the diameter of the gas channel, a sealing ball is provided at one end of the pull rod below the first piston, the diameter of the sealing ball is equal to the diameter of the gas channel, one end of the sealing ball is fixed on the pull rod, and the other end of the pull rod extends to the outside of the end of the first piston rod, a second spring is provided on the outside of the end of the first piston rod, and the two ends of the second spring are respectively fixed to the ends of the first piston rod and the pull rod.

[0008] Further, a mounting plate is provided on one end of the first piston rod connected to the second spring, the middle part of the mounting plate is sleeved and fixed on the outer side surface of the end part of the first piston rod, and two groups of damping structures are symmetrically provided on the mounting plate, and the damping structure includes a second piston cylinder, a second piston is provided inside the second piston cylinder, a second piston rod is provided in the middle of the second piston, and the middle part of the second piston is slidably connected to the second piston rod, and the upper and lower ends of the second piston are respectively provided with an upper baffle plate and a lower baffle plate sleeved and fixed on the second piston rod, the second piston is provided with a plurality of circumferentially evenly distributed air holes, and the upper and lower baffle plates are both provided with a plurality of blocking holes matching the positions of the air holes, an end plate is provided on the other end of the second piston rod, a threaded area is provided below the end plate, a locking nut is provided on the threaded area, the mounting plate is located between the end plate and the locking nut, and arc through holes are symmetrically provided on the mounting plate, and the ends of the two second piston rods are respectively located in the two arc through holes.

[0009] Furthermore, the liquid storage bottle includes a bottle body, both ends of the bottle body are provided with bottle mouths, the inside of the bottle mouths are provided with sealing plugs, and the ends of the plug tube and the infusion tube are respectively inserted into the two sealing plugs to communicate with the interior of the liquid storage bottle.

[0010] Furthermore, a limit assembly for limiting the position of the liquid storage bottle is provided on the outer side surface of the lower end of the first piston cylinder, and the limit assembly includes symmetrically arranged screws, one end of the screw is fixed to the first piston cylinder, and the other end of the screw is provided with an adjusting nut, a mounting ring is slidably sleeved on the screw, a connecting rod is provided on the mounting ring, one end of the connecting rod is fixed to the mounting ring, and a support plate is provided on the other ends of the two connecting rods, both ends of the support plate are fixed to the connecting rod, a limit hole is provided in the middle of the support plate, and the diameter of the limit hole is larger than the bottle mouth diameter of the liquid storage bottle and smaller than the main body diameter of the bottle body of the liquid storage bottle.

[0011] Furthermore, a third spring is provided between the mounting ring and the adjusting nut. The third spring is sleeved on the screw rod, and one end of the third spring is fixed on the mounting ring, and the other end of the third spring is rotatably connected to the adjusting nut.

[0012] Furthermore, a sponge cushion layer is provided on the contact surface between the support plate and the liquid storage bottle.

[0013] The beneficial effects of the present invention are:

[0014] The leaf device in the present technical solution can increase the pressure in the liquid storage bottle during infusion through the multifunctional terminal, thereby achieving the purpose of rapid infusion. At the same time, rapid infusion is achieved by increasing the pressure, and there is no need to place the liquid storage bottle at a higher position. The infusion effect can also be guaranteed, so that when the present device is used as an infusion tool, it can be better used in special environments such as the wild. At the same time, the multifunctional terminal can also be used as a suction tool, which is convenient for medical staff to perform drainage and suction operations on patients during surgery in the wild, further improving the functionality and practicality of the present infusion device.

[0015] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0017] Figure 1 is a three-dimensional schematic diagram of the multifunctional infusion device of the present invention;

[0018] Figure 2 It is a three-dimensional schematic diagram of a multifunctional terminal in the multifunctional infusion device of the present invention;

[0019] Figure 3 It is a schematic cross-sectional view of a multifunctional terminal in the multifunctional infusion device of the present invention;

[0020] Figure 4 It is a three-dimensional schematic diagram of an upper baffle plate and a lower baffle plate provided on the second piston in the multifunctional end head of the present invention;

[0021] Figure 5 It is a three-dimensional schematic diagram of the limiting component in the multifunctional infusion device of the present invention.

[0022] The following are marked in the accompanying drawings:

[0023] 1. First piston cylinder; 2. Plug-in tube; 3. Arc-shaped through hole; 4. First piston; 5. First spring; 6. First piston rod; 7. Groove; 8. Bump; 9. Lower limit groove; 10. Upper limit groove; 11. Pull rod; 12. Blocking ball; 13. Second spring; 14. Second piston cylinder; 15. Second piston rod; 16. End plate; 17. Locking nut; 18. Mounting plate; 19. Threaded area; 20. Second piston; 21. Lower baffle; 22. Upper baffle; 23. Air vent; 24. Blocking hole; 25. Screw; 26. Adjusting nut; 27. Mounting ring; 28. Connecting rod; 29. ​​Third spring; 30. Support plate; 31. Liquid storage bottle; 32. Blocking plug; 33. Infusion tube. DETAILED DESCRIPTION

[0024] like Figure 1 to Figure 5 As shown, the present invention is a multifunctional infusion device for emergency rescue, comprising a multifunctional terminal, a liquid storage bottle 31 and an infusion tube 33 connected in sequence, the multifunctional terminal comprising a first piston cylinder 1, both ends of the first piston cylinder 1 are provided with end surfaces, a first piston 4 is provided inside the first piston cylinder 1, a first spring 5 is provided between the first piston 4 and the inner wall of the upper end of the first piston cylinder 1, the two ends of the first spring 5 are respectively fixedly connected to the first piston 4 and the inner side surface of the end of the first piston cylinder 1, a first piston rod 6 is provided in the middle of the surface of the first piston 4 where the first spring 5 is provided, one end of the first piston rod 6 is rotatably connected to the first piston 4, and the other end of the first piston rod 6 is provided from the end of the first piston cylinder 1. The first piston cylinder 1 passes through a through hole, and grooves 7 are symmetrically provided on the first piston rod 6. A protrusion 8 corresponding to the position of the groove 7 is provided in the through hole arranged on the end of the first piston cylinder 1, and the protrusion 8 is slidably connected in the groove 7. The part of the first piston rod 6 located in the first piston cylinder 1 is provided with a lower limiting groove 9, and the part of the first piston rod 6 located outside the first piston cylinder 1 is provided with an upper limiting groove 10. A plug-in tube 2 is provided in the middle of the lower end surface of the first piston cylinder 1, one end of the plug-in tube 2 is fixedly connected to the end of the first piston cylinder 1 and is connected to the interior of the first piston cylinder 1, the other end of the plug-in tube 2 is inserted into the interior of one end of the liquid storage bottle 31, and one end of the infusion tube 33 is inserted into the interior of the other end of the liquid storage bottle 31.

[0025] The working principle of the above technical solution is:

[0026] When used as an infusion tool, first lift the first piston rod 6 upward to compress the first spring 5. When the first spring 5 is compressed to the right position, rotate the first piston rod 6 to make the convex block 8 set on the end surface of the first piston cylinder 1 snap into the lower limiting groove 9 to limit the compression position of the first spring 5. Then the medical staff assemble the liquid storage bottle 31 and the infusion tube 33. After the assembly is completed, the medical staff injects the medicine into the liquid storage bottle 31 by means of a syringe. After the injection of the medicine bottle is completed, rotate the first piston rod 6 to make the convex block 8 be located in the groove 7 set on the first piston rod 6. That is, at this time, the first spring 5 will inject air into the interior of the liquid storage bottle 31 through the first piston 4 during the process of restoring the deformation, thereby increasing the pressure in the liquid storage bottle 31, thereby quickly promoting the flow of medicine, and thereby increasing the rate of infusion during rescue. It is not difficult to understand that the setting of the convex block 8 and the lower limiting groove 9 can limit the position of the spring after deformation, thereby freeing the hands of the medical staff and facilitating the subsequent operation of the medical staff.

[0027] When used as a suction tool (for example, when blood is drawn or drained during surgery), first press the first piston rod 6 downward to stretch the first spring 5. When the first spring 5 is stretched to the limit position, rotate the first piston rod 6 to allow the bump 8 provided on the end face of the first piston cylinder 1 to be snapped into the upper limiting groove 10. Then assemble the liquid storage bottle 31, the infusion tube 33 and other components. After the assembly is completed, when a certain part of the patient needs to be suctioned, it is only necessary to place the other end of the infusion tube 33 at the designated position, and then rotate the first piston rod 6 to allow the bump 8 to be located in the groove 7. That is, the resetting of the first spring 5 will drive the first piston 4 to move upward, thereby forming a negative pressure in the liquid storage bottle 31, and then the liquid at the other end of the infusion tube 33 is sucked into the liquid storage bottle 31, thereby playing a role of drainage or suction.

[0028] The multifunctional terminal can increase the pressure in the liquid storage bottle 31 during infusion, thereby achieving the purpose of rapid infusion. At the same time, by increasing the pressure, it is not necessary to place the liquid storage bottle 31 at a higher position, and the effect of infusion can be guaranteed, so that when the device is used as an infusion tool, it can be better used in special environments such as the field (the liquid storage bottle 31 is placed too high and remains unchanged during use, and the placement position is raised by a dedicated person); at the same time, the multifunctional terminal can also be used as a suction tool, which is convenient for medical staff to perform drainage and suction operations on patients during surgery in the field.

[0029] In one feasible manner, a gas passage is provided penetrating the middle part of the first piston 4 and the middle part of the first piston rod 6, a pull rod 11 is provided in the gas passage, the diameter of the pull rod 11 is smaller than the diameter of the gas passage, a sealing ball 12 is provided at one end of the pull rod 11 below the first piston 4, the diameter of the sealing ball 12 is equal to the diameter of the gas passage, one end of the sealing ball 12 is fixed on the pull rod 11, and the other end of the pull rod 11 extends to the outside of the end of the first piston rod 6, a second spring 13 is provided on the outside of the end of the first piston rod 6, and the two ends of the second spring 13 are respectively fixed to the ends of the first piston rod 6 and the pull rod 11.

[0030] After the multifunctional end is connected to the liquid storage bottle 31, there may be a situation where the spring deformation reset process once cannot completely deliver the liquid in the liquid storage bottle 31, and then after the first spring 5 is reset, it needs to be deformed again to provide positive pressure. Therefore, at this time, there is no need to remove the liquid storage bottle 31, and only the pull rod 11 needs to be pressed down to connect the inside of the first piston cylinder 1 with the outside. That is, at this time, when the first piston rod 6 is pulled upward, air can enter through the gas channel, that is, no negative pressure will be generated, that is, no negative pressure will be generated in the liquid storage bottle 31, that is, no influence will be caused on the infusion process. When the first spring 5 is compressed to the limit position, the pull rod 11 is released, and under the action of the second spring 13, the pull rod 11 is reset, and the blocking ball 12 at its end will close the gas channel. Then, when the first spring 5 is reset, the air cannot overflow from the gas channel, and then acts on the liquid storage bottle 31, and continues to apply positive pressure to the liquid storage bottle 31. Of course, when performing the suction operation, the method of applying negative pressure here can be known through the above-mentioned operation method, and no more details will be given here.

[0031] In an practicable manner, a mounting plate 18 is provided on one end of the first piston rod 6 connected to the second spring 13, the middle part of the mounting plate 18 is sleeved and fixed on the outer side surface of the end of the first piston rod 6, and two groups of damping structures are symmetrically provided on the mounting plate 18, the damping structure includes a second piston cylinder 14, a second piston 20 is provided inside the second piston cylinder 14, a second piston rod 15 is provided in the middle part of the second piston 20, the middle part of the second piston 20 is slidably connected to the second piston rod 15, and the upper and lower ends of the second piston 20 are respectively provided with an upper baffle 22 and a lower baffle 21 sleeved and fixedly arranged on the second piston rod 15, and the upper baffle 22, the lower baffle 21 and the second piston 20 are arranged in contact with each other. Of course, the contact pressure cannot be too large, and it can play a certain contact surface sealing role. When the second piston 20 is rotated with the rotation of the upper baffle plate 22 and the lower baffle plate 21 (the second piston 20 and the inner wall of the second piston cylinder 14 have contact pressure, so it is relatively simple to achieve the above-mentioned contact method, and no further details are given here), the second piston 20 is provided with a plurality of circumferentially evenly distributed air holes 23, the upper baffle plate 22 and the lower baffle plate 21 are provided with a plurality of blocking holes 24 that match the positions of the air holes 23, an end plate 16 is provided on the other end of the second piston rod 15, a threaded area 19 is provided below the end plate 16, a locking nut 17 is provided on the threaded area 19, a mounting plate 18 is located between the end plate 16 and the locking nut 17, an arc through hole 3 is symmetrically provided on the mounting plate 18, and the ends of the two second piston rods 15 are respectively located in the two arc through holes 3.

[0032] First, the arc-shaped through hole 3 is provided to avoid interference between the second piston rod 15 and the mounting plate 18 when the first piston rod 6 rotates, that is, the working principle of the damping structure setting is: taking the present device as an infusion tool for explanation, when the first spring 5 recovers its deformation, the torque of the first spring 5 resetting will be too fast, that is, it will cause the positive pressure applied to the liquid storage bottle 31 to be too large, resulting in the problem of excessive infusion speed and unstable infusion speed. Therefore, the setting of the damping structure can drive the mounting plate 18 to move downward when the first spring 5 is reset, and then drive the second piston rod 15 to move downward, so that the air in the lower part of the second piston cylinder 14 moves slowly upward from the air vent 23, thereby controlling the resetting speed of the first spring 5, so that the energy stored in the first spring 5 is slowly and steadily released, thereby improving the stability of liquid delivery during infusion, and at the same time controlling the flow rate;

[0033] The setting of the blocking holes 24 on the upper baffle 22 and the lower baffle 21 can be achieved by rotating the second piston rod 15 so that the blocking holes and the air holes 23 on the upper baffle 22 and the lower baffle 21 are staggered, thereby changing the air permeability area of ​​the air hole 23, and then adjusting the damping effect of the damping structure. Of course, the setting of the locking nut 17, on the one hand, is to block the downward movement of the mounting plate 18 when the device is used as an infusion tool, thereby driving the second piston rod 15 to move downward. At the same time, the locking nut 17 can be rotated to clamp it on the mounting plate 18, thereby limiting the rotation of the second screw 25, thereby avoiding the problem that the second piston rod 15 rotates during use, resulting in a change in the area of ​​the air hole 23.

[0034] In an practicable manner, the liquid storage bottle 31 includes a bottle body, both ends of the bottle body are provided with a bottle mouth, the inside of the bottle mouth is provided with a sealing plug 32, and the end of the insertion tube 2 and the end of the infusion tube 33 are respectively inserted into the two sealing plugs 32 to communicate with the inside of the liquid storage bottle 31. This design of the liquid storage bottle 31 can meet the use requirements of the present technical solution. At the same time, when the liquid storage bottle 31 is used as an infusion tool, a medicine bag can be set inside it, and the medicine liquid can be injected into the inside of the medicine bag. At the same time, when blood is transfused, the bag containing blood can also be placed in the liquid storage bottle 31. The advantage of this is that it prevents air from directly contacting the medicine liquid or blood.

[0035] In one feasible manner, a limiting assembly for limiting the position of a liquid storage bottle 31 is provided on the outer side surface of the lower end of the first piston cylinder 1, and the limiting assembly includes a symmetrically arranged screw rod 25, one end of the screw rod 25 is fixed on the first piston cylinder 1, and the other end of the screw rod 25 is provided with an adjusting nut 26, a mounting ring 27 is slidably sleeved on the screw rod 25, a connecting rod 28 is provided on the mounting ring 27, one end of the connecting rod 28 is fixed on the mounting ring 27, and a support plate 30 is provided on the other ends of the two connecting rods 28, both ends of the support plate 30 are fixed on the connecting rod 28, and a limiting hole is provided in the middle of the support plate 30, and the diameter of the limiting hole is larger than the bottle mouth diameter of the liquid storage bottle 31 and smaller than the main body diameter of the bottle body of the liquid storage bottle 31.

[0036] With this arrangement, an upward force can be applied to the mounting ring 27 by rotating the adjusting nut 26, so that the liquid storage bottle 31 can be clamped between the support plate 30 and the end of the first piston cylinder 1, thereby limiting the position of the liquid storage bottle 31 for ease of use during patient movement.

[0037] In one practicable manner, a third spring 29 is provided between the mounting ring 27 and the adjusting nut 26 , the third spring 29 is sleeved on the screw rod 25 , and one end of the third spring 29 is fixed on the mounting ring 27 , and the other end of the third spring 29 is rotatably connected to the adjusting nut 26 .

[0038] The third spring 29 is provided to provide a supporting force, which can buffer the force applied to the liquid storage bottle 31 when it moves up and down, thereby protecting the liquid storage bottle 31. At the same time, the support plate 30 can be pulled downward to deform the characteristic spring, thereby increasing the distance between the support plate 30 and the first piston cylinder 1, so that the liquid storage bottle 31 can be replaced more simply. When installing a new liquid storage bottle 31, it is only necessary to put it in and then release the support plate 30. After the third spring 29 is reset, a clamping force can be applied to the liquid storage bottle 31, which makes it more convenient to use. That is, the adjusting nut 26 in this way can adjust the clamping force of the spring, which will not be elaborated here.

[0039] In one practicable manner, a sponge cushion layer is provided on the contact surface between the support plate 30 and the liquid storage bottle 31 , so as to protect the liquid storage bottle 31 to a certain extent.

[0040] It should be noted that the infusion tube 33 in the present technical solution is a prior art, and it should also include a flow rate control valve, etc., and the effect of using it with the present device is better (the on and off of the infusion tube 33 can be controlled). No further elaboration will be made here. At the same time, the present device can be used as an infusion tool and a suction tool. The method of using it as a suction tool can be simply inferred based on the principle of use as an infusion tool. Therefore, the principle of using it as a suction tool is not elaborated in detail in the text.

[0041] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A multifunctional infusion device for emergency rescue, characterized in that: The invention comprises a multifunctional terminal, a liquid storage bottle (31) and an infusion tube (33) which are connected in sequence, wherein the multifunctional terminal comprises a first piston cylinder (1), a first piston (4) is arranged inside the first piston cylinder (1), a first spring (5) is arranged between the first piston (4) and the inner wall of the upper end of the first piston cylinder (1), the two ends of the first spring (5) are respectively fixedly connected to the first piston (4) and the inner side surface of the end of the first piston cylinder (1), a first piston rod (6) is arranged in the middle of the surface of the first piston (4) on which the first spring (5) is arranged, one end of the first piston rod (6) is rotatably connected to the first piston (4), the other end of the first piston rod (6) passes through a through hole arranged at the end of the first piston cylinder (1), and the first piston rod (6) is symmetrically provided with grooves ( 7), a convex block (8) corresponding to the position of the groove (7) is provided in the through hole arranged on the end of the first piston cylinder (1), and the convex block (8) is slidably connected in the groove (7), a lower limiting groove (9) is provided on the part of the first piston rod (6) located in the first piston cylinder (1), and an upper limiting groove (10) is provided on the part of the first piston rod (6) located outside the first piston cylinder (1), and a plug-in tube (2) is provided in the middle of the lower end surface of the first piston cylinder (1), one end of the plug-in tube (2) is fixedly connected to the end of the first piston cylinder (1) and communicated with the interior of the first piston cylinder (1), the other end of the plug-in tube (2) is inserted into the interior of one end of the liquid storage bottle (31), and one end of the infusion tube (33) is inserted into the interior of the other end of the liquid storage bottle (31).

2. A multifunctional infusion device for emergency rescue according to claim 1, characterized in that: A gas passage is provided through the middle of the first piston (4) and the middle of the first piston rod (6), a pull rod (11) is provided in the gas passage, the diameter of the pull rod (11) is smaller than the diameter of the gas passage, a sealing ball (12) is provided at one end of the pull rod (11) located below the first piston (4), the diameter of the sealing ball (12) is equal to the diameter of the gas passage, one end of the sealing ball (12) is fixed on the pull rod (11), the other end of the pull rod (11) extends to the outside of the end of the first piston rod (6), a second spring (13) is provided on the outside of the end of the first piston rod (6), and the two ends of the second spring (13) are respectively fixed on the ends of the first piston rod (6) and the pull rod (11).

3. A multifunctional infusion device for emergency rescue according to claim 2, characterized in that: A mounting plate (18) is provided on one end of the first piston rod (6) connected to the second spring (13), the middle part of the mounting plate (18) is sleeved and fixed on the outer side surface of the end of the first piston rod (6), and two groups of damping structures are symmetrically provided on the mounting plate (18), the damping structure comprising a second piston cylinder (14), a second piston (20) is provided inside the second piston cylinder (14), a second piston (20) is provided in the middle part of the second piston (20), the middle part of the second piston (20) is slidably connected to the second piston rod (15), and the upper and lower ends of the second piston (20) are respectively provided with an upper baffle (22) sleeved and fixedly arranged on the second piston rod (15) and a A lower baffle (21), the second piston (20) is provided with a plurality of circumferentially evenly distributed air holes (23), the upper baffle (22) and the lower baffle (21) are both provided with a plurality of blocking holes (24) that match the positions of the air holes (23), an end plate (16) is provided on the other end of the second piston rod (15), a threaded area (19) is provided below the end plate (16), a locking nut (17) is provided on the threaded area (19), the mounting plate (18) is located between the end plate (16) and the locking nut (17), the mounting plate (18) is symmetrically provided with arc-shaped through holes (3), and the ends of the two second piston rods (15) are respectively located in the two arc-shaped through holes (3).

4. A multifunctional infusion device for emergency rescue according to claim 1, characterized in that: The liquid storage bottle (31) comprises a bottle body, both ends of which are provided with bottle openings, the interior of each of which is provided with a sealing plug (32), and the end of the insertion tube (2) and the end of the infusion tube (33) are respectively inserted into the two sealing plugs (32) to communicate with the interior of the liquid storage bottle (31).

5. The multifunctional infusion device for emergency rescue according to claim 1, characterized in that: A limiting assembly for limiting the position of the liquid storage bottle (31) is provided on the outer side surface of the lower end of the first piston cylinder (1), and the limiting assembly comprises a symmetrically arranged screw rod (25), one end of the screw rod (25) is fixed on the first piston cylinder (1), the other end of the screw rod (25) is provided with an adjusting nut (26), a mounting ring (27) is slidably sleeved on the screw rod (25), a connecting rod (28) is provided on the mounting ring (27), one end of the connecting rod (28) is fixed on the mounting ring (27), and a supporting plate (30) is provided on the other ends of the two connecting rods (28), both ends of the supporting plate (30) are fixed on the connecting rod (28), a limiting hole is provided in the middle of the supporting plate (30), and the diameter of the limiting hole is larger than the diameter of the bottle mouth of the liquid storage bottle (31) and smaller than the diameter of the bottle body of the liquid storage bottle (31).

6. A multifunctional infusion device for emergency rescue according to claim 5, characterized in that: A third spring (29) is provided between the mounting ring (27) and the adjusting nut (26); the third spring (29) is sleeved on the screw rod (25), one end of the third spring (29) is fixed on the mounting ring (27), and the other end of the third spring (29) is rotatably connected to the adjusting nut (26).

7. The multifunctional infusion device for emergency rescue according to claim 5, characterized in that: A sponge cushion layer is provided on the contact surface between the support plate (30) and the liquid storage bottle (31).

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