Infusion apparatus capable of preventing air from entering

Abstract

The utility model relates to an infusion apparatus capable of preventing air from entering, which comprises an infusion channel connected with a drip chamber and a speed regulator, an air inlet prevention device is arranged on the infusion channel, a partition plate, a first valve plate and a second valve plate are arranged in a container of the air inlet prevention device, the first valve plate and the second valve plate are hinged on the partition plate, and the container is divided into an upper cavity and a lower cavity. Under the state that the upper cavity is filled with liquid, the first valve plate is turned over downwards under the action of the gravity of the liquid to communicate the upper cavity with the lower cavity, so that the liquid flows to the lower cavity, a balancing weight is arranged on the first valve plate, and the first valve plate is turned over and closed through the gravity of the balancing weight and the lever principle, so that the liquid flows into the lower cavity. The situation that air enters due to the fact that the sealing effect is affected by shaking or inclining of the infusion pipeline is avoided, the instability phenomenon caused by sealing only depending on a floating device in the prior art is avoided, the sealing performance of the infusion device is more stable, and the response speed of the infusion device can be more sensitive. Due to the one-way overturning arrangement of the second valve plate, the air can be effectively discharged out of the infusion channel in time.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an infusion set capable of preventing air from entering. Background Art

[0002] In clinical work, patients' intravenous infusions are mostly carried out with ordinary infusion devices. Because nurses are usually busy with work, they cannot stay by the patient's side for a long time to check whether the infusion is completed. Family members, caregivers or patients themselves may forget to call for various reasons. By the time they find out, a large amount of air has already entered the infusion pipeline, resulting in a large amount of blood returning from the infusion needle at the puncture site. The blood returning in the infusion tube will coagulate and block the needle after a long time, increasing the workload of nursing staff and the unsafe factors of patients. If the air enters the blood circulation seriously, it will cause air embolism and blood circulation disorders. If the amount of air entering is large, it will cause severe hypoxia of the body and cause serious consequences of immediate death.

[0003] Later, some infusion sets with magnetic detection alarm devices appeared, which sounded an alarm when the patient's infusion was completed, such as an automatic alarm drip infusion set with publication number CN105597191B. The existing infusion sets with alarm devices often only have the function of alarming when the infusion is completed. In a ward with a large number of beds or when medical staff are at night, if the medical staff fails to detect the alarm in time, air may enter the patient's blood.

[0004] Therefore, some infusion sets that prevent air from entering the infusion pipeline by setting up exhaust equipment or using a floating device appeared later. For example, the Chinese utility model patent "Infusion Set for Preventing Air from Entering Blood" with application number 202021653311.5 (authorization announcement number CN214018748U) includes a dropper with a floating device inside. A sealing plug is provided at the bottom center of the floating device, and a pipe mouth that seals with the sealing plug is provided at the bottom of the dropper. When the infusion is completed, the floating device drops to the bottom of the dropper along with the liquid level of the medicine, and the sealing plug seals with the pipe mouth of the dropper to prevent air from entering the patient's blood, which does play a role in protecting the patient's life safety to a certain extent.

[0005] However, since the infusion process needs to maintain a sterile environment, although the exhaust equipment is effective, it increases the contact between the pipeline and the outside world, increasing the risk of secondary infection of the patient; and the above-mentioned infusion device that prevents air from entering by setting a floating device will cause the position and angle to change due to the shaking of the infusion pipeline, so that the floating device will tilt and cause poor sealing or failure, thereby allowing air to penetrate and enter, and there are also some unstable factors.

[0006] Therefore, there is an urgent need for an infusion device that has a novel structure, can prevent air from entering when the infusion is completed, and has more stable sealing performance. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide an infusion set with a novel structure and a more stable sealing performance to prevent air from entering when the infusion is completed, in view of the above-mentioned prior art.

[0008] The utility model adopts the following technical solution to solve the above technical problems: an infusion set for preventing air from entering, comprising an infusion channel connected to a drip bucket and a speed regulator, and also comprising an air inlet prevention device connected to the infusion channel, the air inlet prevention device being arranged upstream of the drip bucket, the air inlet prevention device comprising a container capable of accommodating liquid and having a liquid inlet and a liquid outlet, a partition being arranged in the container, a first valve plate and a second valve plate being hingedly connected to the partition, the partition, the first valve plate and the second valve plate being connected to separate the container into an upper chamber and a lower chamber, the upper chamber being connected to the liquid inlet, the lower chamber being connected to the liquid outlet, the first valve plate being able to be turned downwardly and opened to connect the upper chamber and the lower chamber due to the gravity of the liquid when the upper chamber contains liquid, a counterweight being also arranged on the first valve plate, when the upper chamber is in a state without liquid, the first valve plate being able to be turned upwardly and closed by the gravity of the counterweight, and the second valve plate being able to be turned upwardly and opened unidirectionally by the action of an external force.

[0009] In order to enable the counterweight block to better drive the first valve plate to flip, preferably, the first valve plate includes a sealing section and a counterweight section, the counterweight block is arranged on the counterweight section, the hinged part of the first valve plate and the partition plate is located between the sealing section and the counterweight section, and the counterweight block flips the first valve plate up and down through the lever principle.

[0010] In order to enable the partition, the first valve plate and the second valve plate to better separate the upper chamber and the lower chamber distributed vertically in the container, preferably, the partition is vertically connected to the middle section of the inner wall of the container, the first valve plate is hinged at the lower end of the partition, the second valve plate is hinged at the upper end of the partition, and the first valve plate and the second valve plate are respectively inclined upward in opposite directions and connected to their corresponding inner walls of the container.

[0011] In order to make the first valve plate better adapt to the inner wall of the container so that the two can be better opened or closed, preferably, a first connecting plate adapted to the first valve plate is protruded on the inner wall of the container, and when the first valve plate is flipped upward and in a closed state, the first valve plate can resist the first connecting plate and limit excessive flipping of the first valve plate.

[0012] In order to make the second valve plate better adapt to the inner wall of the container so that the two can be better opened or closed, preferably, a second connecting plate adapted to the second valve plate is also protruded on the inner wall of the container. When the second valve plate is in a closed state, the second valve plate can resist the second connecting plate and limit the second valve plate from excessively flipping downward to open. The first connecting plate and the second connecting part are respectively provided on two opposite inner walls of the container and arranged up and down.

[0013] In order to better control the second valve plate to flip upward, preferably, a positioning column is further provided on the inner wall of the container, and when the second valve plate flips upward and opens under the action of external force, it can resist the positioning column and limit the second valve plate from being over-opened.

[0014] In order to enable the upper chamber to promptly issue an alarm when there is no liquid and it is in a closed state, preferably, a pressure sensor is further provided at the connection between the first valve plate and the first connecting plate, and the pressure sensor can issue an alarm sound when the first valve plate is in a closed state.

[0015] In order to better install the pressure sensor between the first valve plate and the first connecting plate, preferably, the pressure sensor is a thin film sensor, and the thin film sensor is also electrically connected to a signal amplifier.

[0016] In order to facilitate the control of the action of the infusion device, preferably, a power source is provided on the outer wall of the container, and a power blocking piece is also provided on the power source.

[0017] In order to achieve better sealing between the various components of the anti-air intake device, when the first valve plate and the second valve plate are in a closed state, the contact portions of the first valve plate and the second valve plate with the inner wall of the container are provided with a first sealing member for sealing, the contact portion of the first valve plate and the first connecting plate is also provided with a second sealing member for sealing, and the contact portion of the second valve plate and the second connecting plate is also provided with a third sealing member for sealing.

[0018] Compared with the prior art, the utility model has the advantages that: by arranging an anti-air intake device on the infusion pipeline, and by arranging a partition and a first valve plate and a second valve plate hinged on the partition in the container of the anti-air intake device, an upper chamber and a lower chamber are separated in the container; when the upper chamber is filled with liquid, the first valve plate is flipped downward and opened due to the gravity of the liquid to connect the upper chamber and the lower chamber, so that the liquid flows into the lower chamber; at the same time, by arranging a counterweight on the first valve plate, when the upper chamber is in a state without liquid, the first valve plate can be flipped upward and closed under the gravity of the counterweight to prevent air from entering the infusion device in time; since the first valve plate is flipped and closed by the gravity of the counterweight and the lever principle of the first valve plate, the air will not enter due to the shaking or tilting of the infusion pipeline affecting the sealing effect, thereby solving the instability phenomenon caused by the prior art that can only rely on the floating device for sealing, thereby making the sealing performance of the infusion device more stable and its response speed more sensitive. At the same time, the one-way flipping setting of the second valve plate can also timely and effectively discharge air from the infusion channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural diagram of this embodiment;

[0020] Figure 2 is a three-dimensional structural diagram of the anti-air inlet device in this embodiment;

[0021] Figure 3 Schematic diagram of the cross-sectional structure of the air intake prevention device in this embodiment (the first valve plate and the second valve plate are both in a closed state);

[0022] Figure 4 This is a schematic diagram of the structure in which the first valve plate of the anti-intake device in this embodiment turns downward to connect the upper chamber and the lower chamber;

[0023] Figure 5 Schematic diagram of the structure of the second valve plate of the anti-intake device in this embodiment when it is turned upward and opened to exhaust gas outwards, wherein the arrow indicates the exhaust direction;

[0024] Figure 6 It is a schematic diagram of the installation structure of the partition plate, the first valve plate and the second valve plate in this embodiment. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] Figures 1 to 6 What is shown is a schematic diagram of this embodiment. The infusion set for preventing air from entering in this embodiment mainly includes a drip bucket 1, a speed regulator 2, an infusion channel 3 and an air intake prevention device 4, etc.

[0027] refer to Figures 1 to 3As shown, the infusion channel 3 is connected with a drip bucket 1 and a speed regulator 2, and also includes an anti-air intake device 4 connected to the infusion channel 3, the anti-air intake device 4 is arranged upstream of the drip bucket 1, and the anti-air intake device 4 includes a container 5 that can hold liquid and has a liquid inlet 5a and a liquid outlet 5b. A partition 6 is arranged in the container 5, and a first valve plate 6a and a second valve plate 6b are hinged on the partition 6. After the partition 6, the first valve plate 6a and the second valve plate 6b are connected, the container 5 is divided into an upper chamber 5c and a lower chamber 5d, and the upper chamber 5c is connected to the lower chamber 5d. The liquid inlet 5a and the lower chamber 5d are connected to the liquid outlet 5b. When the upper chamber 5c is filled with liquid, the first valve plate 6a can be flipped downward due to the gravity of the liquid to connect the upper chamber 5c and the lower chamber 5d. A counterweight block 6a1 is also provided on the first valve plate 6a. When the upper chamber 5c is in a liquid-free state, the first valve plate 6a can be flipped upward under the action of the gravity of the counterweight block 6a1 to close the first valve plate 6a. The second valve plate 6b can be flipped upward under the action of an external force to open the second valve plate 6b in one direction.

[0028] In order to make the counterweight 6a1 better drive the first valve plate 6a to flip, refer to Figure 3 As shown, in this embodiment, the first valve plate 6a includes a sealing section 6a2 and a counterweight section 6a3, the counterweight block 6a1 is arranged on the counterweight section 6a3, the hinged portion of the first valve plate 6a and the partition 6 is located between the sealing section 6a2 and the counterweight section 6a3, and the counterweight block 6a1 flips the first valve plate 6a up and down through the lever principle. We can make the weight of the counterweight block 6a1 greater than the weight of the corresponding position of the first valve plate 6a through prior calculation and design, thereby achieving the following goals: when the upper chamber 5c is in a liquid-free state, the first valve plate 6a can flip upward under the action of the gravity of the counterweight block 6a1 to close the first valve plate 6a.

[0029] In addition, in order to better separate the upper chamber 5c and the lower chamber 5d in the container 5, the partition plate 6, the first valve plate 6a and the second valve plate 6b are arranged vertically. Figure 3 As shown, in this embodiment, the partition 6 is vertically connected to the middle section of the inner wall of the container 5, the first valve plate 6a is hinged at the lower end of the partition 6, and the second valve plate 6b is hinged at the upper end of the partition 6, and the first valve plate 6a and the second valve plate 6b are respectively inclined upward in opposite directions and connected to the inner walls of the container 5 corresponding to each other.

[0030] In addition, in order to make the first valve plate 6a better fit the inner wall of the container 5, so that the two can be better opened or closed, and to make the first valve plate 6a and the container 5 have better sealing performance, refer to Figures 2 to 4As shown, in this embodiment, a first connecting plate 5e adapted to the first valve plate 6a is specially provided on the inner wall of the container 5. When the first valve plate 6a is flipped upward and in a closed state, the first valve plate 6a can resist the first connecting plate 5e and limit excessive flipping of the first valve plate 6a.

[0031] At the same time, in order to make the second valve plate better fit the inner wall of the container, so that the two can be better opened or closed, and to make the second valve plate 6b and the container 5 have better sealing performance, refer to Figures 2 to 4 As shown, in this embodiment, a second connecting plate 5f that is compatible with the second valve plate 6b is also protruded on the inner wall of the container 5. When the second valve plate 6b is in a closed state, the second valve plate 6b can resist the second connecting plate 5f and limit the second valve plate 6b from excessively flipping downward and opening. The first connecting plate 5e and the second connecting plate 5f are respectively arranged on two opposite inner walls of the container 5 and are arranged up and down.

[0032] In this embodiment, when the second valve plate 6b is opened unidirectionally to exhaust gas outward, in order to better control the second valve plate 6b to flip upward, refer to Figure 3 and Figure 5 As shown, a positioning column 5g is further provided on the inner side wall of the container 5. When the second valve plate 6b is turned upward and opened under the action of an external force, it can resist the positioning column 5g and limit the second valve plate 6b from being over-opened.

[0033] In this embodiment, in order to ensure that the upper chamber 5c can issue an alarm in time when there is no liquid and the first valve plate 6b is in a closed state, refer to Figure 3 and Figure 6 As shown, a pressure sensor 7 is also provided at the connection between the first valve plate 6a and the first connecting plate 5e. The pressure sensor 7 can emit an alarm sound when the first valve plate 6a is in a closed state. In addition, in order to enable the pressure sensor 7 to be better installed between the first valve plate 6a and the first connecting plate 5e, the pressure sensor 7 here is a thin film sensor. At the same time, the thin film sensor is also electrically connected to a signal amplifier 8 to facilitate signal transmission.

[0034] In this embodiment, in order to facilitate the control of the entire infusion device, a power supply 9 is provided on the outer wall of the container 5, and a power blocking piece 9a is also provided on the power supply 9. When the power supply is needed, the power blocking piece 9a can be unplugged to turn on the power supply 9.

[0035] It is necessary to explain here that in order to achieve better sealing between the various components of the anti-intake device, when the first valve plate 6a and the second valve plate 6b are in a closed state, the contact parts of the first valve plate 6a and the second valve plate 6b with the inner wall of the container 5 are provided with a first sealing member for sealing, the contact part of the first valve plate 6a and the first connecting plate 5e is also provided with a second sealing member for sealing, and the contact part of the second valve plate 6b and the second connecting plate 5f is also provided with a third sealing member for sealing. The first sealing member, the second sealing member and the third sealing member here can all adopt a soft rubber layer, and the connection parts can be better sealed by coating or compounding.

[0036] The working principle of the air-proof device in this embodiment is as follows: when the upper chamber 5c is filled with liquid, the first valve plate 6a is turned downward and opened due to the gravity of the liquid, connecting the upper chamber 5 and the lower chamber 5d, so that the liquid flows into the lower chamber 5d, and the infusion channel 3 is opened to make it in a normal state. For details, refer to Figure 4 As shown; when the infusion is about to be completed, when the upper chamber 5c is in a liquid-free state, the first valve plate 6a can be turned upward and closed under the gravity of the counterweight block 6a1, thereby preventing air from entering the infusion set in time. For details, please refer to Figure 3 When it is necessary to exhaust the gas outward, the second valve plate 6b is opened by applying external force, so that it is turned upward in one direction to achieve external exhaust. For details, please refer to Figure 5 As shown in the figure, the first valve plate 6a in this embodiment is automatically turned over and closed by the weight of the counterweight 6a1 and the lever principle of the first valve plate 6a, and the sealing effect will not be affected by the shaking or tilting of the infusion pipeline, which solves the instability caused by the existing technology that can only rely on the floating device for sealing, so that the sealing performance of the infusion device is more stable and its response speed can be more sensitive.

[0037] It should be noted that in the description of this embodiment, the terms "front, back", "left, right", "inside, outside", "upper, lower" and the like indicating directions or positional relationships are all based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The terms "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An infusion set for preventing air from entering, comprising an infusion channel (3) connected to a drip bucket (1) and a speed regulator (2), characterized in that: The invention also comprises an air inlet prevention device (4) connected to the infusion channel (3), the air inlet prevention device (4) being arranged upstream of the drip bucket (1), the air inlet prevention device (4) comprising a container (5) capable of containing liquid and having a liquid inlet (5a) and a liquid outlet (5b), a partition (6) being arranged in the container (5), a first valve plate (6a) and a second valve plate (6b) being hingedly connected to the partition (6), the partition (6), the first valve plate (6a) and the second valve plate (6b) being connected to separate the container (5) into an upper chamber (5c) and a lower chamber (5d), the upper chamber (5c) being connected to the liquid inlet (5a) and the lower chamber (5d), the upper chamber (5c) being connected to the liquid inlet (5a). ), the lower chamber (5d) is connected to the liquid outlet (5b), the first valve plate (6a) can be turned downward due to the gravity of the liquid to connect the upper chamber (5c) and the lower chamber (5d) when the upper chamber (5c) is filled with liquid, and a counterweight block (6a1) is also provided on the first valve plate (6a). When the upper chamber (5c) is in a liquid-free state, the first valve plate (6a) can be turned upward under the action of the gravity of the counterweight block (6a1) to close the first valve plate (6a), and the second valve plate (6b) can be turned upward under the action of an external force to open the second valve plate (6b) in one direction.

2. The infusion set for preventing air from entering according to claim 1, characterized in that: The first valve plate (6a) comprises a sealing section (6a2) and a counterweight section (6a3), the counterweight block (6a1) is arranged on the counterweight section (6a3), the hinged portion between the first valve plate (6a) and the partition (6) is located between the sealing section (6a2) and the counterweight section (6a3), and the counterweight block (6a1) flips the first valve plate (6a) up and down through the principle of leverage.

3. The infusion set for preventing air from entering according to claim 1, characterized in that: The partition (6) is vertically connected to the middle section of the inner wall of the container (5), the first valve plate (6a) is hinged at the lower end of the partition (6), and the second valve plate (6b) is hinged at the upper end of the partition (6), and the first valve plate (6a) and the second valve plate (6b) are respectively inclined upward in opposite directions and connected to the inner walls of their corresponding containers (5).

4. The infusion set for preventing air from entering according to claim 1, characterized in that: A first connecting plate (5e) adapted to the first valve plate (6a) is protruded on the inner wall of the container (5); when the first valve plate (6a) is flipped upward and in a closed state, the first valve plate (6a) can resist the first connecting plate (5e) to limit excessive flipping of the first valve plate (6a).

5. The infusion set for preventing air from entering according to claim 4, characterized in that: The inner wall of the container (5) is also provided with a second connecting plate (5f) which is compatible with the second valve plate (6b). When the second valve plate (6b) is in a closed state, the second valve plate (6b) can resist the second connecting plate (5f) and limit the second valve plate (6b) from excessively turning downward and opening. The first connecting plate (5e) and the second connecting plate (5f) are respectively provided on two opposite inner walls of the container (5) and are arranged up and down.

6. The infusion set for preventing air from entering according to claim 1, characterized in that: A positioning column (5g) is also provided on the inner side wall of the container (5), and when the second valve plate (6b) is flipped upward and opened under the action of an external force, it can resist the positioning column (5g) to limit the second valve plate (6b) from being over-opened.

7. The infusion set for preventing air from entering according to claim 4, characterized in that: A pressure sensor (7) is also provided at the connection point between the first valve plate (6a) and the first connecting plate (5e), ​​and the pressure sensor (7) can emit an alarm sound when the first valve plate (6a) is in a closed state.

8. The infusion set for preventing air from entering according to claim 7, characterized in that: The pressure sensor (7) is a thin film sensor, and the thin film sensor is also electrically connected to a signal amplifier (8).

9. The infusion set for preventing air from entering according to any one of claims 1 to 8, characterized in that: A power source (9) is provided on the outer side wall of the container (5), and a power source blocking piece (9a) is also provided on the power source.

10. The infusion set for preventing air from entering according to claim 4, characterized in that: When the first valve plate (6a) and the second valve plate (6b) are in a closed state, the contact portions of the first valve plate (6a) and the second valve plate (6b) with the inner wall of the container (5) are provided with a first sealing member for sealing, the contact portion of the first valve plate (6a) and the first connecting plate (5e) is also provided with a second sealing member for sealing, and the contact portion of the second valve plate (6b) and the second connecting plate (5f) is also provided with a third sealing member for sealing.

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