LU505406B1

LU505406B1 - Liquid pumping device capable of quantitatively pumping liquid

Info

Publication number: LU505406B1
Application number: LU505406A
Authority: LU
Inventors: Zhen Huang
Original assignee: The Second Affiliated Hospital And Yuying Childrens Hospital Of Wenzhou Medical Univ
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2024-05-02

Abstract

The invention discloses a liquid pumping device capable of quantitatively pumping liquid, which is characterized by comprising a chassis, a liquid pump and a traction driver, wherein the liquid pump comprises a liquid pumping pipe, a liquid pumping piston and a catheter; a first limit seat is fixedly arranged on the chassis; the first limit seat is provided with a first avoidance groove; the first avoidance groove is arranged upward through one side of the first limit seat; the traction driver is provided with a traction rope; and a second limit seat is slidably connected with the chassis. The second limit seat is provided with a second avoidance groove, which penetrates through one side of the second limit seat upwards. The chassis is connected with a guide slide rail in a sliding way, and the second limit seat is connected with the guide slide rail in a sliding way. A one-way quick adjustment assembly which can limit the one-way sliding of the second limit seat on the guide slide rail is arranged between the second limit seat and the guide slide rail, and a precise control assembly which can accurately adjust and control the sliding distance of the guide slide rail on the chassis is arranged between the guide slide rail and the chassis. And the invention is beneficial to improving the operation efficiency.

Description

LIQUID PUMPING DEVICE CAPABLE OF QUANTITATIVELY 7505406

PUMPING LIQUID

TECHNICAL FIELD

The invention relates to the technical field of medical auxiliary equipment, in particular to a liquid pumping device capable of quantitatively pumping liquid.

BACKGROUND

In clinical work, the dosage of liquid medicine required by doctors is often different from the conventional dosage contained in the liquid medicine bottle. For example, the liquid medicine bottle contains 500 ml of liquid medicine, but the doctor needs 200 ml of liquid medicine, so the nurse needs to extract it with a syringe.

However, the maximum capacity syringe commonly used in clinic is 50 ml at present, which requires the nurse to extract it repeatedly, which is not only time-consuming and laborious, but also increases the probability of liquid medicine pollution. At the same time, the bottle stopper is easy to leak when repeatedly punctured by a needle, resulting in inaccurate liquid medicine dosage in the bottle.

SUMMARY

In view of the shortcomings in the prior art, the purpose of the present invention is to provide a liquid pumping device capable of quantitatively pumping liquid, so as to solve the problems raised in the above background technology.

In order to achieve the above purpose, the invention provides the following technical scheme: a liquid pumping device capable of quantitatively pumping liquid, comprising a chassis, a liquid pump detachably and fixedly connected to the chassis, and a traction driver arranged on the chassis for driving and controlling the liquid pump. The liquid pump comprises a liquid pumping pipe with a tubular structure, a liquid pumping piston axially and slidably connected in the liquid pumping pipe, and a catheter communicated between the liquid medicine bottle and the liquid pumping pipe. One end of the catheter is detachably connected with the liquid inlet of the liquid pumping pipe, and the liquid medicine in the liquid medicine bottle can be introduced into the liquid pumping pipe through the catheter in the process that the traction driver pulls the liquid pumping piston to slide outwards.

The chassis is fixedly provided with a first limit seat for limiting the axial sliding 7505406 of the pumping pipe, which is arranged in abutment with one end of the pumping pipe extending out of the liquid pumping piston. The first limit seat is provided with a first avoidance groove for the liquid pumping piston to pass through, and the first avoidance groove is arranged upward through one side of the first limit seat, and the width of the first avoidance groove is not less than the outer diameter of the liquid pumping piston and less than the pumping pipe.

The traction driver is provided with a traction rope for traction of the liquid pumping piston, and the tail end of the traction rope is detachably connected with the liquid pumping piston; and a second limit seat for limiting the moving stroke of the liquid pumping piston is slidably connected to the chassis. The second limit seat is provided with a second avoidance groove for the traction rope to pass through, and the second avoidance groove is arranged upward through one side of the second limit seat.

The width of the second avoidance groove is not less than the outer diameter of the traction rope and the outer diameter of the liquid pumping piston. The sliding direction of the second limit seat on the chassis is consistent with the sliding direction of the liquid pumping piston, and the chassis is slidably connected with a guide slide rail for placing the second limit seat. The sliding direction of the guide slide rail on the chassis is consistent with the length direction of the guide slide rail and the sliding direction of the liquid pumping piston, and the second limit seat is slidably connected with the guide slide rail. Moreover, the sliding direction of the second limit seat on the guide slide rail is consistent with the length direction of the guide slide rail. A one-way quick adjustment assembly is arranged between the second limit seat and the guide slide rail, which can limit the one-way sliding of the second limit seat on the guide slide rail, and a precise control assembly is arranged between the guide slide rail and the chassis, which can accurately adjust the sliding distance of the guide slide rail on the chassis.

The invention is further arranged as follows: the one-way quick adjustment assembly comprises one-way ratchet teeth arranged on the guide slide rail, one-way buckling arms rotatably connected to the second limit seat and capable of locking with the one-way ratchet teeth, and elastic pieces arranged on the second limit seat for HUS05408 pushing the one-way buckling arms to keep locking with the one-way ratchet teeth all the time, wherein a plurality of one-way ratchet teeth are arranged along the length direction of the guide slide rail. One end of the one-way buckling arm is bent and provided with a buckling hook which can be buckled with the one-way ratchet teeth, and the other end is provided with a pressing part which can drive the one-way buckling arm to rotate and separate the buckling hook from the one-way ratchet teeth.

When the buckling hook is buckled with the one-way ratchet teeth, the second limit seat can be prevented from sliding in the direction away from the liquid pump. When the second limit seat slides in the direction close to the liquid pump, the buckling hook can slide over the one-way ratchet teeth.

The invention is further arranged as follows: the middle part of the one-way buckling arm is integrally provided with a lug for rotating connection with the second limit seat, and the lug is rotatably connected with the second limit seat through a hinge shaft, and the lug is located between the pressing part and the buckling hook.

The elastic piece includes a torsion spring body sleeved on the hinge shaft, and an elastic torsion arm respectively abutting against the one-way buckling arm and the second limit seat, and the second limit seat is provided with a button capable of manipulating the pressing part.

The invention is further arranged as follows: the second limit seat includes a limit plate that can abut against the liquid pumping piston, and a base that is slidably connected to the guide slide rail. The base is provided with a chute that can be slidably connected to the guide slide rail, and the chute is arranged in a dovetail groove structure, and the guide slide rail is adapted to the chute. There are two one-way quick adjustment assemblies that are symmetrically arranged on both sides of the width of the second limit seat and the guide slide rail.

The invention is further arranged as follows: the precise control assembly includes a control gear connected to the chassis in an axial rotation, a rack arranged on the guide slide rail, and a limiting structure arranged between the chassis and the control gear to limit the rotation of the control gear. The control gear is meshed with the rack, and the length direction of the rack is consistent with that of the guide slide 7505406 rail. There are a plurality of control gears, and each control gear is arranged along the guide slide rail.

The invention is further arranged as follows: the limiting structure comprises a fixed convex ring fixedly arranged on the chassis, a rotating shaft coaxially and fixedly connected with the control gear, a rotating convex ring coaxially arranged on the rotating shaft, and a limiting handwheel which can be sleeved on the fixed convex ring and the rotating convex ring at the same time. The rotating shaft coaxially passes through the fixed convex ring and is rotatably connected with the chassis. The rotating convex ring is arranged at one end of the rotating shaft which passes through the chassis and extends outwards. The outer diameter of the fixed convex ring is larger than that of the rotating convex ring. The outer side wall of the fixed convex ring is densely provided with rotation-limiting straight grooves, and the inner side wall of the limiting handwheel is convexly provided with rotation-limiting ribs that can slide into the rotation-limiting straight groove, and the limiting handwheel is connected to the rotating convex ring for limiting axial sliding and rotation, and the length of the rotating convex ring is not less than that of the limiting handwheel.

The invention is further arranged as follows: the traction driver comprises a sealed piston cylinder which can be fixed on the chassis, a traction piston which is axially slidably connected in the sealed piston cylinder, a filling liquid filled in the sealed piston cylinder, and a traction spring abutting between the sealed piston cylinder and the traction piston, wherein the traction piston comprises a piston rod body which penetrates one end of the sealed piston cylinder, and the piston rod body is hermetically arranged with the sealed piston cylinder. The traction spring is sleeved on the piston rod body, and the traction piston can divide the cavity in the sealed piston cylinder into a left cavity and a right cavity which are mutually independent and sealed. The traction piston is provided with a communication hole which can communicate with the left cavity and the right cavity, and a plugging piston which can block the communication hole. A piston rod body which can operate the plugging piston is axially slidably and hermetically connected in the piston rod body. When the plugging piston blocks the communication hole, the traction piston can be restricted 7505406 from sliding in the sealed piston cylinder, and the traction piston can slide under the action of the traction spring when the communication hole is in the state of communicating the left cavity and the right cavity. 5 The invention is further arranged as follows: the end face of the traction piston far away from the piston rod body is coaxially provided with a sealing hole for the plugging piston to be embedded. The sealing hole includes a straight hole inner wall at the open end and a tapered hole inner wall at the bottom, one end of the communication hole is communicated with the sealing hole, and the opening of the communication hole is located on the tapered hole inner wall. The other end of the communication hole runs through the end face of the traction piston near the piston rod body. The plugging piston is made of elastic rubber and has a hollow structure.

The plugging piston includes a sealing straight ring that can be attached to the straight hole inner wall and a sealing conical ring that can be attached to the tapered hole inner wall.

The invention is further arranged as follows: one end of the piston rod body, which is close to the sealed piston cylinder, is radially penetrated with a through groove. The through groove is arranged corresponding to the piston rod body, and the length direction of the through groove is consistent with the sliding direction of the piston rod body. The piston rod body is provided with an operating handle which can extend outward from the through groove.

The invention is further arranged as follows: one end of the catheter is provided with a socket cap which can be sleeved on the liquid inlet of the liquid pumping pipe, and the other end is provided with a catheter needle which can be inserted into the liquid medicine bottle, and the length of the catheter needle is not less than that of the liquid medicine bottle. The chassis is provided with a positioning scale which can display the dosage of the liquid medicine pumped into the liquid pumping pipe by the liquid pumping piston, and the moving stroke of the second limit seat is set corresponding to the positioning scale.

To sum up, the invention has the following beneficial effects. In clinical work, 7505406 the nurse can place the liquid pumping device on the table top of the mobile console, and the liquid medicine bottle can be placed in the drawer of the mobile console or on the shelf at the side. Before operation, the liquid medicine bottle can be communicated with the liquid pumping pipe through the catheter, then the liquid pump is placed on the chassis, and finally the traction rope is connected with the liquid pumping piston, and then the liquid medicine can be introduced into the liquid pump through the traction driver. The capacity of the liquid pump is larger than that of the conventional syringe, so it is not necessary for the nurse to repeatedly extract, which is beneficial to improve the operation efficiency of the nurse. At the same time, the liquid pump is communicated with the liquid medicine bottle through the catheter, and one end of the catheter is detachably connected with the liquid inlet of the liquid pump. When using the liquid medicine extracted by the liquid pump, it is only necessary to separate the catheter from the liquid pump without repeatedly puncturing the catheter and the liquid medicine bottle, which effectively reduces the possibility of liquid medicine pollution and liquid leakage.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic structural diagram of a liquid pumping device capable of quantitatively pumping liquid;

FIG. 2 is a longitudinal sectional view of the chassis at the one-way quick adjustment assembly and the precise control assembly;

FIG. 3 is a cross-sectional view of the guide slide rail at the one-way quick adjustment assembly;

FIG. 4 is a longitudinal sectional view of the other side of the chassis at the one-way quick adjustment assembly and the precise control assembly;

FIG. 5 is a sectional view of the traction driver.

Reference numerals: 1. chassis; 11. first limit seat; 111. first avoidance groove; 12. second limit seat; 121. limit plate; 122. base; 123. second avoidance groove; 124. button; 125. chute; 13. guide slide rail; 131. one-way ratchet teeth; 132. rack; 14. one-way quick adjustment assembly; 141. one-way buckling arm; 1411. buckling hook; 1412. pressing part; 1413. lug; 1414. hinge shaft; 142. elastic piece; 1421. 7505406 torsion spring body; 1422. elastic torsion arm; 15. precise control assembly; 151. control gear; 152. limiting structure; 1521. fixed convex ring; 1522. rotating shaft; 1523. rotating convex ring; 1524. limit the limiting handwheel; 16. positioning scale; 2. liquid pump; 21. liquid pumping pipe; 22. liquid pumping piston; 23. catheter; 231. socket cap; 232. catheter needle; 3. traction driver; 31. traction rope; 32. sealed piston cylinder; 33. traction piston; 331. piston rod body; 3311. through groove; 332. communication hole; 333. sealing hole; 3331. straight hole inner wall; 3332. tapered hole inner wall; 34. traction spring; 35. plugging piston; 351. sealing straight ring; 352. sealing conical ring; 36. piston rod body; 361. operating handle; 4. liquid medicine bottle.

DESCRIPTION OF THE INVENTION

The present invention will be further described in detail with reference to the attached drawings and examples. Wherein like parts are denoted by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to the directions towards or away from the geometric centre of a specific part respectively.

Referring to Figs. 1-5, a liquid pumping device capable of quantitatively pumping liquid comprises a chassis 1, a liquid pump 2 detachably and fixedly connected to the chassis 1, and a traction driver 3 arranged on the chassis 1 for driving and controlling the liquid pump 2. The liquid pump 2 comprises a liquid pumping pipe 21 with a tubular structure, a liquid pumping piston 22 axially and slidably connected in the liquid pumping pipe 21, and a catheter 23 communicated between the liquid medicine bottle 4 and the liquid pumping pipe 21. One end of the catheter 23 is detachably connected with the liquid inlet of the liquid pumping pipe 21, and the liquid medicine in the liquid medicine bottle 4 can be introduced into the liquid pumping pipe 21 through the catheter 23 in the process that the traction driver 3 pulls the liquid pumping piston 22 to slide outwards. The liquid pump 2 can be a large syringe, preferably with a capacity of 300 ml. The liquid pump 2 and the traction driver 3 can be placed on the chassis 1 to make the whole liquid pumping device HUS05408 integrated, thus facilitating the liquid pumping device to be placed on the table top of the mobile console. The chassis 1 can be detachably connected with the mobile console by adding additional dismounting parts, which is beneficial to improving the placement stability and use stability of the liquid pumping device.

The chassis 1 is fixedly provided with a first limit seat 11 for limiting the axial sliding of the pumping pipe 21, which is arranged in abutment with one end of the pumping pipe 21 extending out of the liquid pumping piston 22. The first limit seat 11 is provided with a first avoidance groove 111 for the liquid pumping piston 22 to pass through, and the first avoidance groove 111 is arranged upward through one side of the first limit seat 11, and the width of the first avoidance groove 111 is not less than the outer diameter of the liquid pumping piston 22 and less than the pumping pipe 21.

When the traction driver 3 pulls the liquid pumping piston 22 to slide outwards, the liquid pumping pipe 21 can be limited to slide under the action of the first limit seat 11, so that the liquid pumping piston 22 can slide outwards in the liquid pumping pipe 21 conveniently, meanwhile, the arrangement of the first avoidance groove 111 can effectively avoid the liquid pumping piston 22, which not only facilitates the limiting of the liquid pumping pipe 21, but also facilitates the nurses to disassemble and assemble the liquid pump 2 and the chassis 1.

The traction driver 3 is provided with a traction rope 31 for traction of the liquid pumping piston 22, and the tail end of the traction rope 31 is detachably connected with the liquid pumping piston 22, so that a U-shaped hook capable of hooking the tail end of the liquid pumping piston 22 can be arranged at the tail end of the traction rope 31, so that the rapid disassembly and assembly of the traction rope 31 and the liquid pumping piston 22 can be conveniently realized, and a second limit seat 12 for limiting the moving stroke of the liquid pumping piston 22 is slidably connected to the chassis 1. The second limit seat 12 is provided with a second avoidance groove 123 for the traction rope 31 to pass through, and the second avoidance groove 123 is arranged upward through one side of the second limit seat 12. The width of the second avoidance groove 123 is not less than the outer diameter of the traction rope 31 and the outer diameter of the liquid pumping piston 22, and the second avoidance groove HUS05408 123 can allow the traction rope 31 to pass through, so that the traction driver 3 can pull the liquid pumping piston 22 through the traction rope 31, and the movement stroke of the liquid pumping piston 22 can be limited by the second limit seat 12, which is also convenient for the nurse to disassemble and assemble the liquid pump 2 and the chassis 1.

The sliding direction of the second limit seat 12 on the chassis 1 is consistent with the sliding direction of the liquid pumping piston 22, and the chassis 1 is slidably connected with a guide slide rail 13 for placing the second limit seat 12. The sliding direction of the guide slide rail 13 on the chassis 1 is consistent with the length direction of the guide slide rail 13 and the sliding direction of the liquid pumping piston 22, and the second limit seat 12 is slidably connected with the guide slide rail 13. Moreover, the sliding direction of the second limit seat 12 on the guide slide rail 13 is consistent with the length direction of the guide slide rail 13. A one-way quick adjustment assembly 14 is arranged between the second limit seat 12 and the guide slide rail 13, which can limit the one-way sliding of the second limit seat 12 on the guide slide rail 13, and a precise control assembly 15 is arranged between the guide slide rail 13 and the chassis 1, which can accurately adjust the sliding distance of the guide slide rail 13 on the chassis 1. The one-way quick adjustment assembly 14 can enable the second limit seat 12 to slide to the side of the first limit seat 11 on the chassis 1, and can also limit the second limit seat 12 from sliding to the side far away from the first limit seat 11. This assembly can quickly slide the first limit seat 11 to set the position, which is beneficial to improving the operating efficiency. The precise control assembly 15 can accurately control the moving stroke of the second limit seat 12, thus accurately controlling the moving stroke of the liquid pumping piston 22, and further accurately controlling the liquid pumping amount of the liquid pump 2, thus greatly improving the liquid pumping accuracy of the liquid pumping device.

In clinical work, the nurse can place the liquid pumping device on the table top of the mobile console, and the liquid medicine bottle 4 can be placed in the drawer of the mobile console or on the shelf at the side. Before operation, the liquid medicine bottle 4 can be communicated with the liquid pumping pipe 21 through the catheter 23, HUS05408 then the liquid pump 2 is placed on the chassis 1, and finally the traction rope 31 is connected with the liquid pumping piston 22, and then the liquid medicine can be introduced into the liquid pump 2 through the traction driver 3. The capacity of the liquid pump 2 is larger than that of the conventional syringe, so it is not necessary for the nurse to repeatedly extract, which is beneficial to improve the operation efficiency of the nurse. At the same time, the liquid pump 2 is communicated with the liquid medicine bottle 4 through the catheter 23, and one end of the catheter 23 is detachably connected with the liquid inlet of the liquid pump 2. When using the liquid medicine extracted by the liquid pump 2, it is only necessary to separate the catheter 23 from the liquid pump 2 without repeatedly puncturing the catheter 23 and the liquid medicine bottle 4, which effectively reduces the possibility of liquid medicine pollution and liquid leakage.

The one-way quick adjustment assembly 14 comprises one-way ratchet teeth 131 arranged on the guide slide rail 13, one-way buckling arms 141 rotatably connected to the second limit seat 12 and capable of locking with the one-way ratchet teeth 131, and elastic pieces 142 arranged on the second limit seat 12 for pushing the one-way buckling arms 141 to keep locking with the one-way ratchet teeth 131 all the time, wherein a plurality of one-way ratchet teeth 131 are arranged along the length direction of the guide slide rail 13. One end of the one-way buckling arm 141 is bent and provided with a buckling hook 1411 which can be buckled with the one-way ratchet teeth 131, and the other end is provided with a pressing part 1412 which can drive the one-way buckling arm 141 to rotate and separate the buckling hook 1411 from the one-way ratchet teeth 131. When the buckling hook 1411 is buckled with the one-way ratchet teeth 131, the second limit seat 12 can be prevented from sliding in the direction away from the liquid pump 2. When the second limit seat 12 slides in the direction close to the liquid pump 2, the buckling hook 1411 can slide over the one-way ratchet teeth 131. The one-way quick adjustment assembly 14 can not only realize the one-way lock-free sliding and the reverse limited sliding of the second limit seat 12, but also has simple structure and easy implementation, and is convenient and quick to control, which is beneficial to improving the regulation efficiency of HUS05408 medical staff.

The middle part of the one-way buckling arm 141 is integrally provided with a lug 1413 for rotating connection with the second limit seat 12, and the lug 1413 is rotatably connected with the second limit seat 12 through a hinge shaft 1414, and the lug 1413 is located between the pressing part 1412 and the buckling hook 1411. The elastic piece 142 includes a torsion spring body 1421 sleeved on the hinge shaft 1414, and an elastic torsion arm 1422 respectively abutting against the one-way buckling arm 141 and the second limit seat 12, and the second limit seat 12 is provided with a button 124 capable of manipulating the pressing part 1412. The one-way buckling arm 141 is hinged with the second limit seat 12 through the lug 1413 and the hinge shaft 1414, and the buckling hook 1411 can always be kept in contact with the one-way ratchet teeth 131 through the torsion spring, so that the one-way quick adjustment assembly 14 can continuously and effectively realize one-way lock-free sliding and reverse limited sliding of the second limit seat 12, and the structure is simple and easy to implement.

The second limit seat 12 includes a limit plate 121 that can abut against the liquid pumping piston 22, and a base 122 that is slidably connected to the guide slide rail 13.

The base 122 is provided with a chute 125 that can be slidably connected to the guide slide rail 13, and the chute 125 is arranged in a dovetail groove structure, and the guide slide rail 13 is adapted to the chute 125. There are two one-way quick adjustment assemblies 14 that are symmetrically arranged on both sides of the width of the second limit seat 12 and the guide slide rail 13. The dovetail groove can effectively avoid the slippage of the second limit seat 12, at the same time, it is also beneficial to improve the sliding stability of the second limit seat 12, and it can also realize the placement of the two one-way quick adjustment assemblies 14, thus being beneficial to further improve the stability of the second limit seat 12 when it plays a limiting role and the convenience of operation.

The precise control assembly 15 includes a control gear 151 connected to the chassis 1 in an axial rotation, a rack 132 arranged on the guide slide rail 13, and a limiting structure 152 arranged between the chassis 1 and the control gear 151 to limit HUS05408 the rotation of the control gear 151. The control gear 151 is meshed with the rack 132, and the length direction of the rack 132 is consistent with that of the guide slide rail 13. There are a plurality of control gears 151, and each control gear 151 is arranged along the guide slide rail. When the control gear 151 is rotated, the guide slide rail 13 can be driven to slide along the length direction by the rack 132 engaged with it, and the sliding distance of the guide slide rail 13 driven by the control gear 151 is related to the circumference of the control gear 151, so that the sliding distance of the guide slide rail 13 can be accurately regulated by the control gear 151, so that the second limit seat 12 can be quickly adjusted to the approximate position after the one-way quick adjustment assembly 14, The second limit seat 12 is precisely controlled by the precise control assembly 15, which greatly improves the control efficiency and accuracy of the second limit seat 12 and is beneficial to the pumping accuracy of the pumping device.

The limiting structure 152 comprises a fixed convex ring 1521 fixedly arranged on the chassis 1, a rotating shaft 1522 coaxially and fixedly connected with the control gear 151, a rotating convex ring 1523 coaxially arranged on the rotating shaft 1522, and a limiting handwheel 1524 which can be sleeved on the fixed convex ring 1521 and the rotating convex ring 1523 at the same time. The rotating shaft 1522 coaxially passes through the fixed convex ring 1521 and is rotatably connected with the chassis 1. The rotating convex ring 1523 is arranged at one end of the rotating shaft 1522 which passes through the chassis 1 and extends outwards. The outer diameter of the fixed convex ring 1521 is larger than that of the rotating convex ring 1523. The outer side wall of the fixed convex ring 1521 is densely provided with rotation-limiting straight grooves, and the inner side wall of the limiting handwheel 1524 is convexly provided with rotation-limiting ribs that can slide into the rotation-limiting straight groove, and the limiting handwheel 1524 is connected to the rotating convex ring 1523 for limiting axial sliding and rotation, and the length of the rotating convex ring 1523 is not less than that of the limiting handwheel 1524. The limiting structure 152 can be provided with only one control gear 151 and can only regulate the rotation of the control gear 151 on the chassis 1, wherein the limiting handwheel 1524 can be 7505406 provided with an outer hole adapted to the outer contour of the rotating convex ring 1523 and an inner hole for the fixed convex ring 1521 to be embedded, and the outer hole and the inner hole can be arranged in a stepped hole structure, wherein the cross section of the rotating convex ring 1523 can be a regular polygon. It can not only restrict the limiting handwheel 1524 from sliding axially on the rotating convex ring 1523, but also drive the rotating convex ring 1523 to rotate synchronously when the limiting handwheel 1524 rotates. This structure is simple and easy to implement. It can not only restrict the rotation of the control gear 151 when the limiting handwheel 1524 is connected with the fixed convex ring 1521, but also limit and lock the guide slide rail 13. At the same time, when the limiting handwheel 1524 is separated from the fixed convex ring 1521, the control gear 151 can be driven to rotate by the limiting handwheel 1524, which greatly improves the convenience of control of the limiting structure 152.

The traction driver 3 comprises a sealed piston cylinder 32 which can be fixed on the chassis 1, a traction piston 33 which is axially slidably connected in the sealed piston cylinder 32, a filling liquid filled in the sealed piston cylinder 32, and a traction spring 34 abutting between the sealed piston cylinder 32 and the traction piston 33, wherein the traction piston 33 comprises a piston rod body 331 which penetrates one end of the sealed piston cylinder 32, and the piston rod body 331 is hermetically arranged with the sealed piston cylinder 32. The traction spring 34 is sleeved on the piston rod body 331, and the traction piston 33 can divide the cavity in the sealed piston cylinder 32 into a left cavity and a right cavity which are mutually independent and sealed. The traction piston 33 is provided with a communication hole 332 which can communicate with the left cavity and the right cavity, and a plugging piston 35 which can block the communication hole 332. A piston rod body 36 which can operate the plugging piston 35 is axially slidably and hermetically connected in the piston rod body 331. When the plugging piston 35 blocks the communication hole 332, the traction piston 33 can be restricted from sliding in the sealed piston cylinder 32, and the traction piston 33 can slide under the action of the traction spring 34 when the communication hole 332 is in the state of communicating the left cavity and the right HUS05408 cavity.

When the left cavity and the right cavity are in communication, the traction spring 34 can be elastically deformed by pulling the traction piston 33 outward, and then the plugging piston 35 blocks the communication hole 332, so that the traction piston 33 stays in the sealed piston cylinder 32, which is convenient for medical staff to use next time, and also convenient for medical staff to connect the traction rope 31 with the liquid pumping piston 22, and then the left cavity and the right cavity are communicated after the plugging piston 35 is removed through the piston rod body 36.

The traction piston 33 can slide inward under the action of the traction spring 34, so as to realize the traction of the liquid pumping piston 22. This structure is simple and easy to implement, which can not only realize the slow traction of the liquid pumping piston 22, but also realize the suspension of the traction piston 33, thus facilitating the medical staff to connect the traction rope 31 with the liquid pumping piston 22, and greatly improving the flexibility and convenience of the liquid pumping device.

In addition, because the liquid pumping device can be placed on the mobile console, and the traction driver 3 can automatically pull the liquid pumping piston 22, there is no need for additional control by medical staff during the liquid pumping process, However, it takes a certain time to pull the liquid pumping piston 22 through the traction driver 3 until it abuts against the second limit seat 12, so that the medical staff can reset the traction driver 3 after using the liquid medicine pumped by the liquid pump 2 once in clinical work. Then, the traction driver 3 drives the liquid pump 2 to pump liquid again, and then pushes the moving console to the next sickbed. At this time, the traction driver 3 can complete the liquid extraction of the liquid pump 2 in the moving process of the moving console, thus further improving the use flexibility of the liquid pumping device.

The end face of the traction piston 33 far away from the piston rod body 331 is coaxially provided with a sealing hole 333 for the plugging piston 35 to be embedded.

The sealing hole 333 includes a straight hole inner wall 3331 at the open end and a tapered hole inner wall 3332 at the bottom, one end of the communication hole 332 is communicated with the sealing hole 333, and the opening of the communication hole HUS05408 332 is located on the tapered hole inner wall 3332. The other end of the communication hole 332 runs through the end face of the traction piston 33 near the piston rod body 331. The plugging piston 35 is made of elastic rubber and has a hollow structure. The plugging piston 35 includes a sealing straight ring 351 that can be attached to the straight hole inner wall 3331 and a sealing conical ring 352 that can be attached to the tapered hole inner wall 3332. The sealing piston 35 has certain elasticity, which can not only seal the communication hole 332 when it is embedded in the sealing hole 333, but also effectively improve the sealing effect of the sealing piston 35 because of the large contact area when it is embedded in the sealing hole 333. At the same time, when the traction spring 34 pushes the traction piston 33 to slide to the right cavity, the filling liquid in the right cavity will further push the hollow sealing piston 35 to block the sealing hole 333, which is conducive to the suspension and stability of the traction piston 33, and thus facilitate the connection of the traction rope 31 to the liquid pumping piston 22 by medical staff.

One end of the piston rod body 331, which is close to the sealed piston cylinder 32, is radially penetrated with a through groove 3311. The through groove 3311 is arranged corresponding to the piston rod body 36, and the length direction of the through groove 3311 is consistent with the sliding direction of the piston rod body 36.

The piston rod body 36 is provided with an operating handle 361 which can extend outward from the through groove 3311. The arrangement of the operating handle 361 can not only conveniently operate the piston rod body 36, but also limit the sliding stroke of the piston rod body 36 by matching with the through groove 3311, thus greatly improving the flexibility of the operation of the traction driver 3.

One end of the catheter 23 is provided with a socket cap 231 which can be sleeved on the liquid inlet of the liquid pumping pipe 21, and the other end is provided with a catheter needle 232 which can be inserted into the liquid medicine bottle 4, and the length of the catheter needle 232 is not less than that of the liquid medicine bottle 4. The arrangement of the socket cap 231 can facilitate the rapid disassembly and assembly of the catheter 23 and the liquid pumping pipe 21, which is beneficial to improve the operation efficiency, while the arrangement of the catheter needle 232 is 7505406 beneficial to improve the utilization rate of the liquid medicine in the liquid medicine bottle 4.

The chassis 1 is provided with a positioning scale 16 which can display the dosage of the liquid medicine pumped into the liquid pumping pipe 21 by the liquid pumping piston 22, and the moving stroke of the second limit seat 12 is set corresponding to the positioning scale 16. The positioning scale 16 can be displayed as the dosage of liquid medicine, which is convenient for medical staff to adjust and control the dosage of liquid pumping device.

The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, a number of improvements and retouching without departing from the principles of the invention should also be regarded as the protection scope of the invention.

Claims

CLAIMS LU505406

1. À liquid pumping device capable of quantitatively pumping liquid, which 1s characterized by comprising a chassis (1), a liquid pump (2) detachably and fixedly connected to the chassis (1), and a traction driver (3) arranged on the chassis (1) for driving and controlling the liquid pump (2); the liquid pump (2) comprises a liquid pumping pipe (21) with a tubular structure, a liquid pumping piston (22) axially and slidably connected in the liquid pumping pipe (21), and a catheter (23) communicated between the liquid medicine bottle (4) and the liquid pumping pipe (21); one end of the catheter (23) is detachably connected with the liquid inlet of the liquid pumping pipe (21), and the liquid medicine in the liquid medicine bottle (4) can be introduced into the liquid pumping pipe (21) through the catheter (23) in the process that the traction driver (3) pulls the liquid pumping piston (22) to slide outwards; the chassis (1) is fixedly provided with a first limit seat (11) for limiting the axial sliding of the pumping pipe (21), which is arranged in abutment with one end of the pumping pipe (21) extending out of the liquid pumping piston (22); the first limit seat (11) is provided with a first avoidance groove (111) for the liquid pumping piston (22) to pass through, and the first avoidance groove (111) is arranged upward through one side of the first limit seat (11), and the width of the first avoidance groove (111) is not less than the outer diameter of the liquid pumping piston (22) and less than the pumping pipe (21); the traction driver (3) is provided with a traction rope (31) for traction of the liquid pumping piston (22), and the tail end of the traction rope (31) is detachably connected with the liquid pumping piston (22); and a second limit seat (12) for limiting the moving stroke of the liquid pumping piston (22) is slidably connected to the chassis (1); the second limit seat (12) is provided with a second avoidance groove (123) for the traction rope (31) to pass through, and the second avoidance groove (123) is arranged upward through one side of the second limit seat (12); the width of the second avoidance groove (123) is not less than the outer diameter of the traction rope (31) and the outer diameter of the liquid pumping piston (22); the sliding direction of the second limit seat (12) on the chassis (1) is consistent with the sliding direction of the liquid pumping piston (22), and the chassis (1) is slidably connected with a guide HUS05408 slide rail (13) for placing the second limit seat (12); the sliding direction of the guide slide rail (13) on the chassis (1) is consistent with the length direction of the guide slide rail (13) and the sliding direction of the liquid pumping piston (22), and the second limit seat (12) is slidably connected with the guide slide rail (13); moreover, the sliding direction of the second limit seat (12) on the guide slide rail (13) is consistent with the length direction of the guide slide rail (13); a one-way quick adjustment assembly (14) is arranged between the second limit seat (12) and the guide slide rail (13), which can limit the one-way sliding of the second limit seat (12) on the guide slide rail (13), and a precise control assembly (15) is arranged between the guide slide rail (13) and the chassis (1), which can accurately adjust the sliding distance of the guide slide rail (13) on the chassis (1).

2. The liquid pumping device capable of quantitatively pumping liquid according to claim 1, characterized in that the one-way quick adjustment assembly (14) comprises one-way ratchet teeth (131) arranged on the guide slide rail (13), one-way buckling arms (141) rotatably connected to the second limit seat (12) and capable of locking with the one-way ratchet teeth (131), and elastic pieces (142) arranged on the second limit seat (12) for pushing the one-way buckling arms (141) to keep locking with the one-way ratchet teeth (131) all the time, wherein a plurality of one-way ratchet teeth (131) are arranged along the length direction of the guide slide rail (13); one end of the one-way buckling arm (141) is bent and provided with a buckling hook (1411) which can be buckled with the one-way ratchet teeth (131), and the other end is provided with a pressing part (1412) which can drive the one-way buckling arm (141) to rotate and separate the buckling hook (1411) from the one-way ratchet teeth (131); when the buckling hook (1411) is buckled with the one-way ratchet teeth (131), the second limit seat (12) can be prevented from sliding in the direction away from the liquid pump (2); when the second limit seat (12) slides in the direction close to the liquid pump (2), the buckling hook (1411) can slide over the one-way ratchet teeth (131).

3. The liquid pumping device capable of quantitatively pumping liquid according HUS05408 to claim 2, characterized in that the middle part of the one-way buckling arm (141) is integrally provided with a lug (1413) for rotating connection with the second limit seat (12), and the lug (1413) is rotatably connected with the second limit seat (12) through a hinge shaft (1414), and the lug (1413) is located between the pressing part (1412) and the buckling hook (1411); the elastic piece (142) includes a torsion spring body (1421) sleeved on the hinge shaft (1414), and an elastic torsion arm (1422) respectively abutting against the one-way buckling arm (141) and the second limit seat (12), and the second limit seat (12) is provided with a button (124) capable of manipulating the pressing part (1412).

4. The liquid pumping device capable of quantitatively pumping liquid according to claim 2 or 3, characterized in that the second limit seat (12) includes a limit plate (121) that can abut against the liquid pumping piston (22), and a base (122) that is slidably connected to the guide slide rail (13); the base (122) is provided with a chute (125) that can be slidably connected to the guide slide rail (13), and the chute (125) is arranged in a dovetail groove structure, and the guide slide rail (13) is adapted to the chute (125), there are two one-way quick adjustment assemblies (14) that are symmetrically arranged on both sides of the width of the second limit seat (12) and the guide slide rail (13).

5. The liquid pumping device capable of quantitatively pumping liquid according to claim 1, characterized in that the precise control assembly (15) includes a control gear (151) connected to the chassis (1) in an axial rotation, a rack (132) arranged on the guide slide rail (13), and a limiting structure (152) arranged between the chassis (1) and the control gear (151) to limit the rotation of the control gear (151); the control gear (151) is meshed with the rack (132), and the length direction of the rack (132) is consistent with that of the guide slide rail (13); there are a plurality of control gears (151), and each control gear (151) is arranged along the guide slide rail (13).

6. The liquid pumping device capable of quantitatively pumping liquid according HUS05408 to claim 5, characterized in that the limiting structure (152) comprises a fixed convex ring (1521) fixedly arranged on the chassis (1), a rotating shaft (1522) coaxially and fixedly connected with the control gear (151), a rotating convex ring (1523) coaxially arranged on the rotating shaft (1522), and a limiting handwheel (1524) which can be sleeved on the fixed convex ring (1521) and the rotating convex ring (1523) at the same time; the rotating shaft (1522) coaxially passes through the fixed convex ring (1521) and is rotatably connected with the chassis (1); the rotating convex ring (1523) is arranged at one end of the rotating shaft (1522) which passes through the chassis (1) and extends outwards; the outer diameter of the fixed convex ring (1521) is larger than that of the rotating convex ring (1523); the outer side wall of the fixed convex ring (1521) is densely provided with rotation-limiting straight grooves, and the inner side wall of the limiting handwheel (1524) is convexly provided with rotation-limiting ribs that can slide into the rotation-limiting straight groove, and the limiting handwheel (1524) is connected to the rotating convex ring (1523) for limiting axial sliding and rotation, and the length of the rotating convex ring (1523) is not less than that of the limiting handwheel (1524).

7. The liquid pumping device capable of quantitatively pumping liquid according to claim 1, characterized in that the traction driver (3) comprises a sealed piston cylinder (32) which can be fixed on the chassis (1), a traction piston (33) which is axially slidably connected in the sealed piston cylinder (32), a filling liquid filled in the sealed piston cylinder (32), and a traction spring (34) abutting between the sealed piston cylinder (32) and the traction piston (33), wherein the traction piston (33) comprises a piston rod body (331) which penetrates one end of the sealed piston cylinder (32), and the piston rod body (331) is hermetically arranged with the sealed piston cylinder (32); the traction spring (34) is sleeved on the piston rod body (331), and the traction piston (33) can divide the cavity in the sealed piston cylinder (32) into a left cavity and a right cavity which are mutually independent and sealed; the traction piston (33) is provided with a communication hole (332) which can communicate with the left cavity and the right cavity, and a plugging piston (35) which can block HUS05408 the communication hole (332); a piston rod body (36) which can operate the plugging piston (35) is axially slidably and hermetically connected in the piston rod body (331); when the plugging piston (35) blocks the communication hole (332), the traction piston (33) can be restricted from sliding in the sealed piston cylinder (32), and the traction piston (33) can slide under the action of the traction spring (34) when the communication hole (332) is in the state of communicating the left cavity and the right cavity.

8. The liquid pumping device capable of quantitatively pumping liquid according to claim 7, characterized in that the end face of the traction piston (33) far away from the piston rod body (331) is coaxially provided with a sealing hole (333) for the plugging piston (35) to be embedded; the sealing hole (333) includes a straight hole inner wall (3331) at the open end and a tapered hole inner wall (3332) at the bottom, one end of the communication hole (332) is communicated with the sealing hole (333), and the opening of the communication hole (332) is located on the tapered hole inner wall (3332); the other end of the communication hole (332) runs through the end face of the traction piston (33) near the piston rod body (331); the plugging piston (35) is made of elastic rubber and has a hollow structure; the plugging piston (35) includes a sealing straight ring (351) that can be attached to the straight hole inner wall (3331) and a sealing conical ring (352) that can be attached to the tapered hole inner wall (3332).

9. The liquid pumping device capable of quantitatively pumping liquid according to claim 7 or 8, characterized in that one end of the piston rod body (331), which is close to the sealed piston cylinder (32), is radially penetrated with a through groove (3311); the through groove (3311) is arranged corresponding to the piston rod body (36), and the length direction of the through groove (3311) is consistent with the sliding direction of the piston rod body (36); the piston rod body (36) is provided with an operating handle (361) which can extend outward from the through groove (3311).

10. The liquid pumping device capable of quantitatively pumping liquid HUS05408 according to claim 1, characterized in that one end of the catheter (23) is provided with a socket cap (231) which can be sleeved on the liquid inlet of the liquid pumping pipe (21), and the other end is provided with a catheter needle (232) which can be inserted into the liquid medicine bottle (4), and the length of the catheter needle (232) is not less than that of the liquid medicine bottle (4); the chassis (1) is provided with a positioning scale (16) which can display the dosage of the liquid medicine pumped into the liquid pumping pipe (21) by the liquid pumping piston (22), and the moving stroke of the second limit seat (12) is set corresponding to the positioning scale (16).