CN216061532U

CN216061532U - Uninterrupted injection device

Info

Publication number: CN216061532U
Application number: CN202121983186.9U
Authority: CN
Inventors: 李晓; 李知; 胡明君
Original assignee: Guangyuan Central Hospital
Current assignee: Guangyuan Central Hospital
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2022-03-18
Anticipated expiration: 2031-08-23

Abstract

The utility model discloses an uninterrupted injection device, relates to the field of injection pumps, and provides an injection device capable of basically realizing uninterrupted injection of a medicine. The injection device comprises an injection pump and an injector, wherein the injection pump comprises an injection pump main body and an injector driving structure; the syringe is mounted on a syringe drive structure which is capable of driving a syringe piston in a reciprocating motion. The injector comprises an injection tube end cover, a protective sleeve, an input connector, an output connector, two input one-way valves and two output one-way valves; the injection tube end cover is connected to the rear end of the injection tube, and the piston rod penetrates through the injection tube end cover and is sealed with the injection tube end cover; the front end and the rear end of the injection tube are provided with an input hole and an output hole; the input one-way valves are arranged in one-to-one correspondence with the input holes and are connected with the injection tubes, and the output one-way valves are arranged in one-to-one correspondence with the output holes and are connected with the injection tubes; the input connector is connected with the two input one-way valves, and the output connector is connected with the two output one-way valves.

Description

Uninterrupted injection device

Technical Field

The utility model relates to the field of injection pumps, in particular to an uninterrupted injection device.

Background

The injection pump is a medical appliance used for slowly, slightly and accurately injecting the liquid medicine into the body of a patient. The existing injection pump comprises an injection pump main body and an injector driving structure, when in use, a common injector sucking liquid medicine is arranged on the injector driving structure, the injector driving structure drives a piston rod of the injector to slowly move forwards to slowly push out the liquid medicine at a constant speed, so that the slow, micro and accurate medicine injection is realized. The above-mentioned injection pumps are disclosed in patent ZL202022021898.4 and ZL 201921694967.9.

Clinically, some liquid medicines need to be slowly injected into a human body for a long time, and after the liquid medicines in the syringe of the injection pump are injected, the injection pipeline needs to be detached, an empty syringe needs to be taken down, the syringe which sucks the liquid medicines is replaced, and then the injection pipeline is connected. The above operation inevitably causes interruption of liquid medicine injection, and uninterrupted injection cannot be realized; the syringe has smaller capacity, shorter replacement interval and more frequent operation.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: an injection device is provided that enables substantially uninterrupted injection of a medicament.

The technical scheme adopted for solving the problems is as follows: the uninterrupted injection device comprises an injection pump and an injector, wherein the injection pump comprises an injection pump main body and an injector driving structure; the injector comprises an injection tube, a piston rod and an operation piece, wherein the piston is positioned in the injection tube, a first liquid cavity is formed between the piston and the front end of the injection tube, the piston rod is connected with the piston and extends out of the injection tube, and the operation piece is connected with the piston rod; the injector is arranged on the injector driving structure; the injector comprises an injection tube end cover, a protective sleeve, an input connector, an output connector, two input one-way valves and two output one-way valves; the injection tube end cover is connected to the rear end of the injection tube, the piston rod penetrates through the injection tube end cover and is sealed with the injection tube end cover, and a second liquid cavity is formed between the piston and the injection tube end cover; the front end of the injection cylinder is provided with an input hole and an output hole communicated with the first liquid cavity, and the rear end of the injection cylinder is provided with an input hole and an output hole communicated with the second liquid cavity; the input one-way valves are arranged in one-to-one correspondence with the input holes and are connected with the injection tubes, and the output one-way valves are arranged in one-to-one correspondence with the output holes and are connected with the injection tubes; the input connector is connected with both the two input one-way valves, and the output connector is connected with both the two output one-way valves; the protective sleeve is sleeved on the piston rod and is connected with the injection tube end cover and the operation sheet; the syringe driving structure is provided with an operating sheet groove, the operating sheet is clamped in the operating sheet groove, and the syringe driving structure can drive the operating sheet to move in a reciprocating mode so as to drive the piston rod and the piston to move in a reciprocating mode.

Further, the method comprises the following steps: the protective sleeve is a corrugated pipe made of silica gel.

Further, the method comprises the following steps: the syringe pump includes an infusion suspension device.

Further, the method comprises the following steps: infusion linkage includes connecting seat and transfusion rod, and the one end at syringe pump main part top is connected to the connecting seat, and transfusion rod is articulated with the connecting seat, and transfusion rod can rotate to level or vertical, and transfusion rod sets up along syringe pump main part length direction when rotatory to the level, has the couple on the transfusion rod.

Further, the method comprises the following steps: the transfusion hanging device comprises a first limiting rod and a second limiting rod; the connecting seat is provided with a U-shaped groove, the end part of the transfusion rod is positioned in the U-shaped groove and is hinged with the connecting seat, the first limiting rod is transversely arranged and is connected with the connecting seat, and the second limiting rod is hinged with the connecting seat; when the transfusion rod is vertical, the second limiting rod rotates to be transversely arranged, and the first limiting rod and the second limiting rod are respectively located on two sides of the transfusion rod and limit the transfusion rod to rotate together.

The utility model has the beneficial effects that: in use, as shown in fig. 4, the fluid bag is suspended and connected to the inlet connector by a tube. Then the operation piece is manually pulled to ensure that the piston is attached to the end cover of the injection tube, the liquid medicine in the liquid bag is pumped into the first liquid cavity, the input one-way valve at the front end of the injection tube is opened and the output one-way valve is closed in the process, the input one-way valve at the rear end of the injection tube is closed, and the output one-way valve is opened. The syringe is then mounted on the syringe drive structure. Then the injection pump is started, the injector driving structure drives the operation piece, the piston rod and the piston to move forwards, the liquid medicine in the first liquid cavity is output, and meanwhile, the liquid medicine in the liquid bag is pumped into the second liquid cavity; in the process, the input one-way valve at the front end of the injection cylinder is closed, the output one-way valve is opened, the input one-way valve at the rear end of the injection cylinder is opened, and the output one-way valve is closed. After that, the piston reciprocates, and the first liquid cavity and the second liquid cavity alternately suck and discharge liquid to realize the continuous output of the liquid until the liquid in the liquid bag is completely transported. When the liquid in the liquid bag is completely transported, the liquid bag is replaced. The utility model can realize the continuous injection of liquid basically except the short-time interruption of the injection when the liquid bag is replaced and the continuous injection of liquid in other time. The liquid bag has large capacity and low replacement frequency; when the liquid bag is changed, the new liquid bag is hung, the plug connected with the empty liquid bag is pulled out and inserted into the new liquid bag, and the operation is convenient and quick.

Drawings

FIG. 1 is a block diagram of an uninterrupted injection device;

FIG. 2 is a view of the syringe structure;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

FIG. 4 is a view of the uninterrupted injection device in use;

FIG. 5 is a diagram of a state in which the syringe pump performs a normal injection;

labeled as: the injection pump comprises an injection pump 1, an injection pump main body 1-1, an injector driving structure 1-2, an operation sheet groove 1-2-1, an infusion suspension device 1-3, an infusion rod 1-3-1, a connecting seat 1-3-2, a U-shaped groove 1-3-2-1, a hook 1-3-3, a first limiting rod 1-3-4, a second limiting rod 1-3-5, an injector 2, an injection tube 2-1, an input hole 2-1-1, an output hole 2-1-2, a piston 2-2, a piston rod 2-3, an operation sheet 2-4, an injection tube end cover 2-5, a protective sleeve 2-6, an input one-way valve 2-7, an output one-way valve 2-8, an input connector 2-9, a piston rod and a piston, An output connector 2-10, a first liquid cavity 2-11, a second liquid cavity 2-12 and a liquid bag 3.

Detailed Description

The utility model is further described with reference to the following figures and detailed description.

As shown in fig. 1 and 2, the uninterrupted injection device comprises an injection pump 1 and an injector 2, wherein the injection pump 1 comprises an injection pump main body 1-1 and an injector driving structure 1-2; the injector 2 comprises an injection tube 2-1, a piston 2-2, a piston rod 2-3 and an operation piece 2-4, wherein the piston 2-2 is positioned in the injection tube 2-1, a first liquid cavity 2-11 is formed between the piston 2-2 and the front end of the injection tube 2-1, the piston rod 2-3 is connected with the piston 2-2 and extends out of the injection tube 2-1, and the operation piece 2-4 is connected with the piston rod 2-3; the injector 2 is arranged on the injector driving structure 1-2; the injector 2 comprises an injection cylinder end cover 2-5, a protective sleeve 2-6, an input connector 2-9, an output connector 2-10, two input one-way valves 2-7 and two output one-way valves 2-8; the injection tube end cover 2-5 is connected to the rear end of the injection tube 2-1, the piston rod 2-3 penetrates through the injection tube end cover 2-5 and is sealed with the injection tube end cover 2-5, and a second liquid cavity 2-12 is formed between the piston 2-2 and the injection tube end cover 2-5; the front end of the injection cylinder 2-1 is provided with an input hole 2-1-1 and an output hole 2-1-2 which are communicated with a first liquid cavity 2-11, and the rear end of the injection cylinder 2-1 is provided with an input hole 2-1-1 and an output hole 2-1-2 which are communicated with a second liquid cavity 2-12; the input one-way valves 2-7 are arranged in one-to-one correspondence with the input holes 2-1-1 and are connected with the injection cylinders 2-1, and the output one-way valves 2-8 are arranged in one-to-one correspondence with the output holes 2-1-2 and are connected with the injection cylinders 2-1; the input connectors 2-9 are connected with the two input one-way valves 2-7, and the output connectors 2-10 are connected with the two output one-way valves 2-8; the protective sleeve 2-6 is sleeved on the piston rod 2-3 and is connected with the injection cylinder end cover 2-5 and the operation sheet 2-4; the syringe driving structure 1-2 is provided with an operating sheet groove 1-2-1, an operating sheet 2-4 is clamped in the operating sheet groove 1-2-1, and the syringe driving structure 1-2 can drive the operating sheet 2-4 to reciprocate so as to drive the piston rod 2-3 and the piston 2-2 to reciprocate.

The present invention improves upon the injector 2 and the injector drive configuration 1-2. The existing syringe driving structure 1-2 has a structure capable of reciprocating, but the existing syringe driving structure 1-2 can only push the operation piece 2-4, the piston rod 2-3 and the piston 2-2 forward, and the reciprocating structure thereof is moved backward for resetting. The utility model is provided with the operation sheet groove 1-2-1, and the operation sheet 2-4 is clamped in the operation sheet groove 1-2-1, so that the injector driving structure 1-2 can drive the operation sheet 2-4 to reciprocate, thereby driving the piston rod 2-3 and the piston 2-2 to reciprocate. The input one-way valve 2-7 is a valve which can be opened in one way towards the inside of the injector 2, and the output one-way valve 2-8 is a valve which can be opened in one way towards the outside of the injector 2. The piston rod 2-3 needs to enter the second liquid chamber 2-12, the piston rod 2-3 should not be contaminated, and the protective sleeve 2-6 is used to prevent contamination of the piston rod 2-3. The protective sheaths 2-6 should be able to flex, preferably being bellows made of silicone.

In use, as shown in fig. 4, the fluid bag 3 is suspended and connected to the fluid bag 3 and the input connectors 2 to 9 by a pipe. Then the operation sheet 2-4 is manually pulled to enable the piston 2-2 to be attached to the end cover 2-5 of the injection cylinder, the liquid medicine in the liquid bag 3 is pumped into the first liquid cavity 2-11, the input one-way valve 2-7 at the front end of the injection cylinder 2-1 is opened, the output one-way valve 2-8 is closed, the input one-way valve 2-7 at the rear end of the injection cylinder 2-1 is closed, and the output one-way valve 2-8 is opened. The syringe 2 is then mounted on the syringe drive mechanism 1-2. Then the injection pump 1 is started, the injector driving structure 1-2 drives the operation piece 2-4, the piston rod 2-3 and the piston 2-2 to move forward, the liquid medicine in the first liquid cavity 2-11 is output, and simultaneously the liquid medicine in the liquid bag 3 is pumped into the second liquid cavity 2-12; in the process, the input one-way valve 2-7 at the front end of the injection tube 2-1 is closed, the output one-way valve 2-8 is opened, the input one-way valve 2-7 at the rear end of the injection tube 2-1 is opened, and the output one-way valve 2-8 is closed. After that, the piston 2-2 reciprocates, the first liquid cavity 2-11 and the second liquid cavity 2-12 alternately suck and discharge liquid, and the liquid is continuously output until the liquid in the liquid bag 3 is completely output. When the liquid in the liquid bag 3 is completely transfused, the liquid bag 3 can be replaced. The utility model can realize the continuous injection of liquid basically except the short-time interruption of the injection when the liquid bag 3 is replaced and the continuous injection of liquid in other time. The liquid bag 3 has large capacity and low replacement frequency; when the liquid bag 3 is replaced, the new liquid bag 3 is hung, and the plug connected with the empty liquid bag 3 is pulled out and inserted into the new liquid bag 3, so that the operation is convenient and quick.

As mentioned before, the utility model needs to be used in connection with a hanging fluid bag 3. The fluid bag 3 can be hung from an existing stand, but takes up a lot of space and requires long piping to connect the fluid bag 3 and the input connectors 2-9. To this end, the preferred infusion pump 1 of the present invention includes an infusion suspension device 1-3. As shown in FIG. 4, the infusion hanging device 1-3 is used for hanging the liquid bag 3, so that an infusion support can be omitted; the liquid bag 3 does not need to be hung very high and is slightly higher than the injection pump main body 1-1, and the pipeline connecting the liquid bag 3 and the input joint 2-9 is very short.

The specific structure of the infusion suspension device 1-3 is preferably as follows: the infusion suspension device 1-3 comprises a connecting seat 1-3-2 and an infusion rod 1-3-1, the connecting seat 1-3-2 is connected to one end of the top of an injection pump main body 1-1, the infusion rod 1-3-1 is hinged to the connecting seat 1-3-2, the infusion rod 1-3-1 can rotate to be horizontal or vertical, the infusion rod 1-3-1 is arranged along the length direction of the injection pump main body 1-1 when rotating to be horizontal, and a hook 1-3-3 is arranged on the infusion rod 1-3-1. When the transfusion device is used, the transfusion rod 1-3-1 is rotated to be upright, and the liquid bag 3 can be hung. As shown in FIG. 5, when not in use, the transfusion rod 1-3-1 is rotated to be horizontal, and the occupied space is small. The length of the transfusion rod 1-3-1 is close to that of the injection pump body 1-1, and the transfusion rod does not exceed the injection pump body 1-1 when rotated to be horizontal.

The transfusion rod 1-3-1 is required to be positioned when rotating to be vertical, and various positioning modes can be specifically provided. The preferred positioning mode of the utility model is shown in figure 3, and an infusion hanging device 1-3 comprises a first limiting rod 1-3-4 and a second limiting rod 1-3-5; the connecting seat 1-3-2 is provided with a U-shaped groove 1-3-2-1, the end part of the transfusion rod 1-3-1 is positioned in the U-shaped groove 1-3-2-1 and is hinged with the connecting seat 1-3-2, the first limiting rod 1-3-4 is transversely arranged and is connected with the connecting seat 1-3-2, and the second limiting rod 1-3-5 is hinged with the connecting seat 1-3-2; when the transfusion rod 1-3-1 is vertical, the second limiting rod 1-3-5 rotates to be arranged transversely, and the first limiting rod 1-3-4 and the second limiting rod 1-3-5 are respectively positioned at two sides of the transfusion rod 1-3-1 and limit the transfusion rod 1-3-1 to rotate together. The second limiting rod 1-3-5 is rotated to the vertical direction, so that the transfusion rod 1-3-1 can be unblocked, and the transfusion rod 1-3-1 can be rotated to the horizontal direction.

The utility model can not only carry out uninterrupted injection, but also carry out ordinary injection, as shown in figure 5, the ordinary injector is arranged on the injector driving structure 1-2.

Claims

1. The uninterrupted injection device comprises an injection pump (1) and an injector (2), wherein the injection pump (1) comprises an injection pump main body (1-1) and an injector driving structure (1-2); the injector (2) comprises an injection tube (2-1), a piston (2-2), a piston rod (2-3) and an operation sheet (2-4), the piston (2-2) is positioned in the injection tube (2-1), a first liquid cavity (2-11) is formed between the piston (2-2) and the front end of the injection tube (2-1), the piston rod (2-3) is connected with the piston (2-2) and extends out of the injection tube (2-1), and the operation sheet (2-4) is connected with the piston rod (2-3); the injector (2) is arranged on the injector driving structure (1-2); the method is characterized in that: the injector (2) comprises an injection cylinder end cover (2-5), a protective sleeve (2-6), an input connector (2-9), an output connector (2-10), two input one-way valves (2-7) and two output one-way valves (2-8); the syringe end cover (2-5) is connected to the rear end of the syringe (2-1), the piston rod (2-3) penetrates through the syringe end cover (2-5) and is sealed with the syringe end cover (2-5), and a second liquid cavity (2-12) is formed between the piston (2-2) and the syringe end cover (2-5); the front end of the injection cylinder (2-1) is provided with an input hole (2-1-1) and an output hole (2-1-2) which are communicated with the first liquid cavity (2-11), and the rear end of the injection cylinder (2-1) is provided with an input hole (2-1-1) and an output hole (2-1-2) which are communicated with the second liquid cavity (2-12); the input one-way valves (2-7) are arranged in one-to-one correspondence with the input holes (2-1-1) and are connected with the injection cylinders (2-1), and the output one-way valves (2-8) are arranged in one-to-one correspondence with the output holes (2-1-2) and are connected with the injection cylinders (2-1); the input joint (2-9) is connected with the two input one-way valves (2-7), and the output joint (2-10) is connected with the two output one-way valves (2-8); the protective sleeve (2-6) is sleeved on the piston rod (2-3) and is connected with the end cover (2-5) of the injection cylinder and the operation sheet (2-4); the syringe driving structure (1-2) is provided with an operating sheet groove (1-2-1), the operating sheet (2-4) is clamped in the operating sheet groove (1-2-1), and the syringe driving structure (1-2) can drive the operating sheet (2-4) to move in a reciprocating mode so as to drive the piston rod (2-3) and the piston (2-2) to move in a reciprocating mode.

2. The non-interruptive injection device according to claim 1, wherein: the protective sleeves (2-6) are corrugated pipes made of silica gel.

3. The non-interruptive injection device according to claim 1, wherein: the injection pump (1) comprises an infusion suspension device (1-3).

4. The non-interruptive injection device according to claim 3, wherein: the infusion suspension device (1-3) comprises a connecting seat (1-3-2) and an infusion rod (1-3-1), the connecting seat (1-3-2) is connected to one end of the top of the injection pump main body (1-1), the infusion rod (1-3-1) is hinged to the connecting seat (1-3-2), the infusion rod (1-3-1) can rotate to be horizontal or vertical, the infusion rod (1-3-1) is arranged along the length direction of the injection pump main body (1-1) when rotating to be horizontal, and a hook (1-3-3) is arranged on the infusion rod (1-3-1).

5. The non-interruptive injection device according to claim 4, wherein: the transfusion hanging device (1-3) comprises a first limiting rod (1-3-4) and a second limiting rod (1-3-5); the connecting seat (1-3-2) is provided with a U-shaped groove (1-3-2-1), the end part of the transfusion rod (1-3-1) is positioned in the U-shaped groove (1-3-2-1) and hinged with the connecting seat (1-3-2), the first limiting rod (1-3-4) is transversely arranged and connected with the connecting seat (1-3-2), and the second limiting rod (1-3-5) is hinged with the connecting seat (1-3-2); when the transfusion rod (1-3-1) is vertical, the second limiting rod (1-3-5) rotates to be arranged transversely, and the first limiting rod (1-3-4) and the second limiting rod (1-3-5) are respectively positioned on two sides of the transfusion rod (1-3-1) and limit the transfusion rod (1-3-1) to rotate together.