Transfusion box

Abstract

The utility model aims to provide an infusion box with high pressure measurement precision and low cost, which comprises a shell and an infusion pump arranged in the shell, cleaning liquid enters the infusion pump from a liquid inlet pipe and is pumped out from a liquid outlet pipe, a pressure sensor is arranged on the liquid inlet pipe in the shell, and the pressure sensor monitors the flow velocity of the cleaning liquid in the liquid inlet pipe in real time. The pressure sensor is arranged in the shell and sealed, the environment in the shell is single and stable, the requirement for the precision degree of the pressure sensor can be lowered, and therefore a common pressure sensor can be selected, and cost is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an infusion box. Background Art

[0002] The ventricular assist system usually includes a control system, a cleaning system and a pumping system (blood pump), etc., wherein the cleaning system drives the cleaning fluid in the hose to flow through a peristaltic pump, so that the output cleaning fluid continuously cleans and lubricates the pumping motor in the pumping system, so as to provide appropriate pressure to prevent the blood in the human body from entering the pumping motor. However, the ventricular assist system in the prior art still has many shortcomings, such as: it is difficult to continuously and controllably perfuse the cleaning fluid into the blood pump. Since the motor in the blood pump will heat up during operation, the bearings in the motor will wear and rub. Generally, the blood pump needs to be perfused with cleaning fluid, and the cleaning fluid is directly released into the blood vessel after flowing through the motor. Therefore, the far end of the motor is set as a passage. In order to prevent blood from entering the motor and causing damage to the blood pump, it is necessary to ensure that high-pressure cleaning fluid continues to flow out from the far end of the motor during the operation of the blood pump. The flow rate of the cleaning fluid is crucial. If the flow rate is too small, it cannot provide a pressure greater than that of the blood, which will cause blood to enter the motor; if the flow rate is too large, too much cleaning fluid will enter the human body, causing damage to the human body. Utility Model Content

[0003] The utility model aims to provide an infusion box with high pressure measurement accuracy and low cost.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an infusion box, including a shell and an infusion pump arranged in the shell, the cleaning liquid enters the infusion pump from the inlet tube and is pumped out from the outlet tube, and a pressure sensor is arranged on the inlet tube located in the shell, and the pressure sensor monitors the flow rate of the cleaning liquid in the inlet tube in real time.

[0005] A fixing block is arranged in the shell, and a groove for limiting the position of the liquid inlet pipe is opened on the fixing block. The pressure sensor is arranged on the liquid inlet pipe located in the groove.

[0006] A magnetic suction plug is arranged on the shell, and the lead wire of the pressure sensor is connected to the magnetic suction plug.

[0007] The shell comprises an upper half and a lower half, which are buckled together and sealed by ultrasonic welding. A first semicircular hole is provided at the middle position of one end of the half, and a filter is installed in the first semicircular hole. Small holes for the liquid inlet pipe and the liquid outlet pipe to pass through are respectively provided at both ends of the shell.

[0008] A one-way valve is arranged on the liquid outlet pipe in the shell, and the conducting direction of the one-way valve is from the upstream to the downstream of the liquid outlet pipe. The one-way valve is arranged near the liquid outlet of the infusion pump.

[0009] The infusion pump includes a pump housing and an internal piston. The liquid inlet and liquid outlet of the infusion pump are respectively connected to the liquid inlet pipe and the liquid outlet pipe. The piston is connected to the piston rod. The piston rod protruding to the outside of the pump housing is provided with transmission teeth. The transmission teeth are engaged with the transmission wheel fixed on the housing. The power drives the transmission wheel to rotate and drives the piston rod to perform linear reciprocating motion.

[0010] The pump casing is cylindrical, and a wing plate extends from one end of the pump casing to the surrounding area. The liquid inlet and the liquid outlet are both arranged on the wing plate. The liquid inlet and the pump casing barrel opening, as well as the liquid outlet and the pump casing barrel opening, are connected through a first connecting groove, and the depth of the first connecting groove is less than the thickness of the wing plate.

[0011] A connecting plate is also provided at the end of the wing plate, and a second connecting groove corresponding to the first connecting groove is opened on the connecting plate. The first connecting groove and the second connecting groove are buckled to form a connecting cavity, and a sealing structure is provided around the periphery.

[0012] A drip pot is arranged on the liquid inlet pipe upstream of the shell.

[0013] In the above solution, the pressure sensor is arranged in the housing and sealed. The environment in the housing is relatively simple and stable, and the precision requirements for the pressure sensor can be reduced. Therefore, an ordinary pressure sensor can be selected to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the infusion system;

[0015] Figure 2 This is the appearance diagram of the infusion box;

[0016] Figure 3-Figure 6 It is a schematic diagram of the internal structure of the infusion box;

[0017] Figure 7 , Figure 8 It is a cross-sectional view of the infusion box. DETAILED DESCRIPTION

[0018] Combine the following Figure 1-Figure 8 The utility model is further described in detail.

[0019] An infusion box includes a housing 10 and an infusion pump 20 disposed in the housing 10. A cleaning liquid enters the infusion pump 20 from an inlet pipe 31 and is pumped out from an outlet pipe 32. A pressure sensor 33 is disposed on the inlet pipe 31 in the housing 10. The pressure sensor 33 monitors the flow rate of the cleaning liquid in the inlet pipe 31 in real time. The pressure sensor 33 is disposed in the housing 10 and sealed. The environment in the housing 10 is relatively simple and stable, and the precision requirements for the pressure sensor 33 can be reduced. Therefore, an ordinary pressure sensor 33 can be selected to reduce costs.

[0020] In order to further improve the measurement accuracy of the pressure sensor 33, a fixed block 35 is arranged in the shell body 10, and a groove is opened on the fixed block 35 for limiting the position of the liquid inlet pipe 31. The pressure sensor 33 is arranged on the liquid inlet pipe 31 located in the groove. Due to the constraints of the fixed block 35 and its groove, the position of the pressure sensor 33 will not change, thereby avoiding the influence of impact and vibration on the sensor accuracy.

[0021] Furthermore, a magnetic plug 34 is provided on the housing 10, and a wire 331 of the pressure sensor 33 is connected to the magnetic plug 34. The pressure sensor is powered and data is transmitted through the magnetic plug 34, and the sealing of the housing 10 is ensured as much as possible.

[0022] The shell 10 includes an upper half and a lower half, which are buckled together and sealed by ultrasonic welding. In the sealed state, the environment inside the shell 10 is relatively stable, further ensuring the measurement accuracy of the pressure sensor 33. A first semicircular hole is opened at the middle position of one end of the half, and a filter 40 is installed in the first semicircular hole. Small holes for the liquid inlet pipe 31 and the liquid outlet pipe 32 to pass through are respectively opened at both ends of the shell 10 to ensure the sealing of the shell 10.

[0023] A one-way valve 36 is provided on the liquid outlet pipe 32 in the housing 10, and the conducting direction of the one-way valve 36 is from the upstream to the downstream of the liquid outlet pipe 32. The one-way valve 36 is arranged near the liquid outlet of the infusion pump 20. The one-way valve 36 is arranged in the housing 10, which can effectively prevent the one-way valve 36 from being damaged by external factors and ensure the reliability of the one-way valve 36.

[0024] The infusion pump 20 includes a pump housing 21 and an internal piston 22. The liquid inlet a and the liquid outlet b of the infusion pump 20 are respectively connected to the liquid inlet pipe 31 and the liquid outlet pipe 32. The piston 22 is connected to the piston rod 23. The piston rod 23 protruding to the outside of the pump housing 21 is provided with a transmission tooth 231. The transmission tooth 231 is engaged with the transmission wheel 24 fixed on the housing 10. The power drives the transmission wheel 24 to rotate and drive the piston rod 23 to perform linear reciprocating motion. The reciprocating motion of the piston 32 is realized by a gear rack linear motion mechanism. During the reciprocating motion of the piston 22, the volume of the chamber of the pump housing 21 increases / decreases, generating negative pressure / positive pressure, and realizing the pumping of the cleaning liquid.

[0025] In order to achieve communication between the liquid inlet a and the liquid outlet b and the inner cavity of the pump casing 21, the pump casing 21 is cylindrical, and a wing plate 25 extends from one end of the pump casing 21 to the surrounding areas. The liquid inlet a and the liquid outlet b are both arranged on the wing plate 25, and the liquid inlet a and the barrel mouth of the pump casing 21 are connected as well as the liquid outlet b and the barrel mouth of the pump casing 21 through a first connecting groove c, and the depth of the first connecting groove c is less than the thickness of the wing plate 25.

[0026] A connecting plate 26 is also provided at the end of the wing plate 25. A second connecting groove d corresponding to the first connecting groove c is formed on the connecting plate 26. The first connecting groove c and the second connecting groove d are buckled together to form a connecting cavity, and a sealing structure is provided around the periphery to prevent leakage of the flushing liquid.

[0027] like Figure 1 As shown, a drip pot 50 is provided on the liquid inlet pipe 31 upstream of the shell 10. The provision of the drip pot 50 facilitates observation of the delivery efficiency of the cleaning liquid on the one hand, and can play a buffering role when replacing the cleaning liquid bag on the other hand.

[0028] Of course, for those skilled in the art, the utility model is not limited to the details of the above exemplary embodiments, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it should be understood that although this specification is described in accordance with the implementation mode, not each implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An infusion box, comprising a housing (10) and an infusion pump (20) disposed in the housing (10), wherein a cleaning liquid enters the infusion pump (20) from an inlet pipe (31) and is pumped out from an outlet pipe (32), characterized in that: A pressure sensor (33) is provided on the liquid inlet pipe (31) located in the housing (10), and the pressure sensor (33) monitors the flow rate of the cleaning liquid in the liquid inlet pipe (31) in real time.

2. The infusion box according to claim 1, characterized in that: A fixing block (35) is arranged in the housing (10), and a groove for defining the position of the liquid inlet pipe (31) is provided on the fixing block (35), and the pressure sensor (33) is arranged on the liquid inlet pipe (31) located in the groove.

3. The infusion box according to claim 1, characterized in that: A magnetic connector (34) is provided on the housing (10), and a lead (331) of the pressure sensor (33) is connected to the magnetic connector (34).

4. The infusion box according to claim 1, characterized in that: The shell (10) comprises an upper half and a lower half, the upper half and the lower half are interlocked and sealed by ultrasonic welding, a first semicircular hole is provided at the middle position of one end of the half, a filter (40) is installed in the first semicircular hole, and small holes for the liquid inlet pipe (31) and the liquid outlet pipe (32) to pass through are respectively provided at both ends of the shell (10).

5. The infusion box according to claim 1, characterized in that: A one-way valve (36) is provided on the liquid outlet pipe (32) in the housing (10). The conducting direction of the one-way valve (36) is from the upstream to the downstream of the liquid outlet pipe (32). The one-way valve (36) is arranged near the liquid outlet of the infusion pump (20).

6. The infusion box according to claim 1, characterized in that: The infusion pump (20) comprises a pump housing (21) and an internal piston (22); a liquid inlet (a) and a liquid outlet (b) of the infusion pump (20) are respectively connected to a liquid inlet pipe (31) and a liquid outlet pipe (32); the piston (22) is connected to a piston rod (23); a transmission tooth (231) is provided on the piston rod (23) protruding to the outside of the pump housing (21); the transmission tooth (231) is meshed with a transmission wheel (24) fixed to the housing (10); the power drives the transmission wheel (24) to rotate and drives the piston rod (23) to perform linear reciprocating motion.

7. The infusion box according to claim 6, characterized in that: The pump housing (21) is cylindrical in shape, and a wing plate (25) is extended in all directions from one end of the pump housing (21). The liquid inlet (a) and the liquid outlet (b) are both arranged on the wing plate (25). The liquid inlet (a) and the barrel opening of the pump housing (21) are in communication with each other, and the liquid outlet (b) and the barrel opening of the pump housing (21) are in communication with each other via a first connecting groove (c). The depth of the first connecting groove (c) is less than the thickness of the wing plate (25).

8. The infusion box according to claim 7, characterized in that: A connecting plate (26) is also provided at the end of the wing plate (25). A second connecting groove (d) corresponding to the first connecting groove (c) is formed on the connecting plate (26). The first connecting groove (c) and the second connecting groove (d) are engaged with each other to form a connecting cavity, and a sealing structure is provided around the circumference.

9. The infusion box according to claim 1, characterized in that: A liquid drip pot (50) is provided on the liquid inlet pipe (31) upstream of the housing (10).

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