CN219453661U - Liquid receiving box, liquid receiving device and infusion system - Google Patents

Abstract

A liquid receiving box, a liquid receiving device and an infusion system, which belong to the technical field of pipeline transportation. The liquid receiving box is internally provided with a liquid receiving chamber, and a first interface, an air inlet and an air outlet which are arranged on the box body and are communicated with the liquid receiving chamber. The first interface is used for being inserted into a joint of the stock solution barrel; the air inlet is used for being connected with the positive pressure gas conveying mechanism so as to convey positive pressure gas to the liquid receiving chamber; the gas outlet is used for discharging positive pressure gas. The liquid level sensor is used for detecting the liquid level of the liquid receiving chamber. The liquid receiving device comprising the liquid receiving box is arranged in the infusion system, so that the screwed-out connector can be subjected to dust removal protection when the original liquid barrel is replaced, and liquid dripping at the connector is received and collected, so that the pollution degree of the connector is reduced, and the infusion quality of the infusion system is improved.

Description

Liquid receiving box, liquid receiving device and infusion system

Technical Field

The application relates to the technical field of pipeline transportation, in particular to a liquid receiving box, a liquid receiving device and an infusion system.

Background

In some production plants, it is necessary to send chemical liquids from the stock tanks to the corresponding plants. In the operation process, the stock solution tank for storing stock solution is connected with a conveying pipeline through a joint. When the stock solution tank is replaced, the joint is required to be unscrewed from the old stock solution tank and placed on the workbench, then the new stock solution tank is replaced, and then the joint placed on the workbench is screwed on the joint of the new stock solution tank.

Some chemical liquids are sensitive to pollution, and when the existing transfusion equipment is used for transfusion, the pollution of the stock solution is easily caused, so that the production cost is increased and the quality is reduced.

Disclosure of Invention

Based on the above-mentioned shortcomings, the present application provides a liquid receiving box, a liquid receiving device and an infusion system, so as to partially or completely improve the problem of pollution of the raw liquid in the related art.

The application is realized in such a way that:

in a first aspect, examples of the present application provide a liquid receiving cartridge comprising: a box body and a liquid level sensor; the box body is internally provided with a liquid receiving chamber and is provided with a first interface, an air inlet and an air outlet; the first interface, the air inlet and the air outlet are communicated with the liquid receiving chamber; the first interface is used for being inserted into a joint of the stock solution barrel; the air inlet is used for being connected with the positive pressure gas conveying mechanism so as to convey positive pressure gas to the liquid receiving chamber; the air outlet is used for discharging positive pressure air; the liquid level sensor is used for detecting the liquid level of the liquid receiving chamber.

In the implementation process, the first interface communicated with the liquid receiving chamber is arranged at the box body of the liquid receiving box, so that an operator can insert the connector of the raw liquid barrel into the interface when the raw liquid barrel is replaced, and the inner cavity of the connector is communicated with the liquid receiving chamber due to the fact that the box body is also arranged. The liquid collecting device is provided with the air inlet and the air outlet which are communicated with the liquid collecting chamber, micro-positive pressure gas can be introduced into the liquid collecting chamber through the air inlet, the micro-positive pressure gas is discharged from the air outlet, air flow is formed in the liquid collecting chamber, dust can be removed and residual liquid drops can be taken away through the air flow on the inner wall of the connector, and the air in the liquid collecting chamber is replaced, so that the inner cavity of the connector is in a clean environment, the pollution degree of the connector is reduced, and the pollution probability of the connector to stock solution in the stock solution barrel is further reduced. Meanwhile, the liquid receiving chamber can collect liquid remained on the inner wall of the joint. The liquid level sensor is arranged, so that the liquid level condition in the liquid receiving chamber can be detected, the liquid in the liquid receiving chamber can be cleaned in time when the liquid level is too high, and the probability that the liquid overflows out of the box body or pollutes the joint is reduced.

With reference to the first aspect, in one possible implementation manner, a liquid storage tube is disposed at the bottom of the box body, and the liquid storage tube is communicated with the liquid receiving chamber.

In the realization process, the liquid storage pipe communicated with the liquid receiving chamber is arranged, so that the residual liquid dripped at the joint can be collected in the liquid storage pipe, the liquid storage capacity in the liquid receiving chamber is reduced, and the pollution probability of the joint is further reduced.

With reference to the first aspect, in one possible implementation manner, the liquid inlet end of the liquid storage tube is connected with the liquid receiving chamber through a first switch valve, and the liquid outlet end of the liquid storage tube is provided with a second switch valve.

In the implementation process, the first switch valve and the second switch valve are arranged at the liquid storage pipe, so that an operator can operate the first switch valve as required to communicate or close the liquid storage pipe and the liquid receiving chamber to store new liquid, or operate the second switch valve to discharge the liquid collected in the liquid storage pipe.

With reference to the first aspect, in one possible implementation manner, the liquid receiving box is provided with an alarm, and the alarm is in communication connection with the liquid level sensor.

In the implementation process, the alarm connected with the liquid level sensor in a communication way is arranged, so that when the liquid level sensor detects that the liquid level information is too high, the alarm can be automatically used for alarming through the alarm, and the operator can conveniently and timely discharge liquid.

With reference to the first aspect, in one possible implementation manner, the outer wall of the liquid receiving box is provided with a fixing piece, and the fixing piece is used for fixing the liquid receiving box to the infusion device.

In the implementation process, the fixing piece is arranged on the outer wall of the liquid receiving box, so that the liquid receiving box can be fixed on corresponding infusion equipment, and the connector detached from the liquid receiving equipment is placed on the infusion box by an operator for dust removal protection.

In a second aspect, examples of the present application provide a liquid receiving apparatus comprising: the liquid receiving box provided in the first aspect and a positive pressure gas conveying mechanism; the positive pressure gas conveying mechanism is connected with the gas inlet.

In the implementation process, the connector detached from the infusion device can be inserted into the liquid receiving chamber through the first interface by using the liquid receiving device, residual liquid attached to the inside of the connector is received, the residual liquid is prevented from dripping on the ground or a workbench, and adverse effects of liquid leakage on the environment or human body are reduced. And, because connect the liquid room to be provided with air inlet and gas outlet, can utilize positive pressure gas conveying mechanism to carry little positive pressure gas to connect the liquid room in through the air inlet, little positive pressure gas discharges from the gas vent, can form the air current in connecing the liquid room to replace the gas in the liquid room, and then can take away the contaminated impurity that adheres to at the joint inner wall through the air current, reduce the probability that the joint caused the pollution in the operation processes such as dismantlement joint.

With reference to the second aspect, in one possible implementation manner, the positive pressure gas delivery mechanism includes a gas cylinder, and the gas cylinder is connected to the gas inlet through a first pipe, and the first pipe is provided with a pressure regulating valve.

In the implementation process, the gas stored in the gas cylinder can be sent to the liquid receiving chamber through the first pipeline, and the pressure of the gas is adjusted by the pressure regulating valve arranged at the first pipeline so as to adjust the flow speed of the gas flow in the liquid receiving chamber, thereby adjusting the dust removal force.

With reference to the second aspect, in one possible implementation manner, the positive pressure gas delivery mechanism includes a filter, and the filter is disposed between the gas cylinder and the pressure regulating valve through the first pipe.

In the implementation process, the filter is arranged between the gas cylinder and the pressure regulating valve, so that the gas output from the gas cylinder can be filtered, and the purer micro-positive pressure gas is conveniently conveyed into the liquid receiving chamber through the first pipeline after pressure regulating treatment of the pressure regulating valve, so that the pollution probability of the joint is further reduced.

In a third aspect, examples of the present application provide an infusion system comprising:

the liquid receiving device provided in the second aspect comprises a stock solution barrel and an infusion box. The stock solution barrel is provided with a liquid phase interface; the infusion box is connected with a joint through a second pipeline, and the second pipeline is provided with a third switch valve; the joint is selectively connected with the liquid phase interface and the first interface; when the joint is connected with the first interface, the third switch valve is in a closed state.

In the implementation process, in the infusion system, the joint can be connected with a liquid phase interface at the stock solution barrel, and chemical stock solution in the stock solution barrel is sent to the liquid receiving device through the second pipeline. When the chemical stock solution in the stock solution barrel is used up and a new stock solution barrel needs to be replaced, the joint can be screwed out from the liquid phase interface of the old stock solution barrel, then the screwed joint is inserted into the first interface of the liquid receiving box, the third switch valve of the second pipeline is closed, micro-positive pressure gas is input into the liquid receiving chamber by utilizing the positive pressure gas conveying mechanism, the inner wall of the joint is dedusted, the pollution probability of the joint is reduced, the pollution probability of the chemical stock solution when the joint is screwed into the new stock solution barrel in the follow-up process is reduced, and the transfusion quality of a transfusion system is improved.

With reference to the third aspect, in one possible embodiment, the joint has an inlet section and an outlet section; the inner wall of the inlet section is provided with a first thread, and the outer wall of the outlet section is sleeved with a second pipeline; the outer wall of the first interface is provided with second threads matched with the first threads, and the joint is optionally connected with the first interface through threads.

In the realization process, the first thread is arranged at the inlet section of the connector, the connector can be connected with the liquid phase interface of the stock solution barrel or the first interface thread at the position of the liquid receiving box through the first thread, the connection strength is improved, the loosening probability of the connector in the process of transfusion or dust removal is reduced, the transfusion safety is further improved, and the probability of discharging the gas leakage out of the atmosphere environment in the process of dust removal protection of the connector is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a schematic view of an infusion device according to the related art;

FIG. 2 is a schematic diagram of an infusion system provided by an example of the present application;

fig. 3 is a schematic structural view of a liquid receiving box provided in an example of the present application;

FIG. 4 is a schematic illustration of the connection of a positive pressure gas delivery mechanism provided by an example of the present application;

fig. 5 is a schematic structural view of a joint provided in an example of the present application.

Icon: 100-transfusion device; 101-a raw liquid tank; 102-a transfusion tank joint; 103-a conveying pipeline; 104-an infusion cabinet; 105-an operation table;

200-an infusion system; 210-a liquid receiving device; 211-a liquid receiving box; 2111-a first interface; 2112—an air inlet; 2113-gas outlet; 2114-level sensor; 2115-reservoir; 2116—a first switching valve; 2117-a second switching valve; 2118-securing member; 212-positive pressure gas delivery mechanism; 2121-gas cylinder; 2122-first tubing; 2123-pressure regulating valve; 2124-filter; 220-a stock solution barrel; 221-liquid phase interface; 230-an infusion box; 231-a second conduit; 232-linker; 2321-an inlet section; 2322-an outlet section; 233-third switching valve.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the present application and in the description of the drawings above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more (including two) unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "upper", "lower", "front", "rear", "bottom", "inner", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "connected," "fixed" and the like are to be construed broadly and include, for example, either fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, in some infusion apparatuses 100, a stock solution tank 101 storing a stock solution of a chemical needs to be connected to a delivery pipe 103 through a delivery tank joint 102, and the chemical liquid is delivered from the stock solution tank 101 to a corresponding infusion cabinet 104 by the delivery pipe 103.

After the chemical stock solution in the old stock solution tank 101 is transferred, the stock solution tank 101 needs to be replaced, and the infusion tank joint 102 is unscrewed from the old stock solution tank 101. The unscrewed infusion set connector 102 is placed on the console 105. The new stock solution tank 101 is then replaced and the infusion tank fitting 102 placed on the console 105 is screwed onto the mouthpiece of the new stock solution tank 101.

However, when the conventional infusion apparatus 100 is used for infusion, contamination of the stock solution is likely to occur, which results in an increase in production cost and a decrease in quality.

The inventors analyzed the cause of the contamination of the stock solution easily caused when the stock solution is delivered by the conventional infusion apparatus 100, found that: when the raw liquid tank 101 is replaced, the unscrewed infusion tank joint 102 is placed on the operation table 105 for a long time, and is exposed to the atmosphere and is easily contaminated. In addition, the chemical liquid remaining on the operation table 105 contaminates the joint and also causes environmental pollution. When the contaminated infusion tank joint 102 is twisted with the new stock solution tank 101 in the subsequent use, the infusion tank joint 102 easily contaminates the stock solution in the new stock solution tank 101, thereby reducing the quality of the stock solution conveyed by the infusion apparatus 100.

Based on this, the present application provides an infusion system 200 to improve infusion quality.

The present example provides an infusion system 200, referring to fig. 2, comprising a fluid receiving device 210, a fluid barrel 220, and an infusion tank 230.

Wherein, the liquid receiving device 210 comprises a liquid receiving box 211 and a positive pressure gas conveying mechanism 212. The interior of the box body is provided with a liquid receiving chamber (not shown in the figure). Referring to fig. 3, the box body is provided with a first interface 2111, an air inlet 2112 and an air outlet 2113, and the first interface 2111, the air inlet 2112 and the air outlet 2113 are all communicated with the liquid receiving chamber. The first interface 2111 is used for inserting a joint of the stock solution barrel 220; the gas inlet 2112 is used for connecting with the positive pressure gas delivery mechanism 212 to deliver positive pressure gas to the liquid receiving chamber. A liquid level sensor 2114 is also provided in the liquid receiving box 211 for detecting the liquid level of the liquid receiving chamber.

With continued reference to fig. 2, the raw liquid barrel 220 has a liquid interface 221; the fluid tank 230 is connected to a joint 232 through a second pipe 231, and the second pipe 231 is provided with a third on-off valve 233. The joint 232 is selectively connected with the liquid phase interface 221 and the first interface 2111; when the joint 232 is connected to the first port 2111, the third on-off valve 233 is in a closed state.

When the chemical liquid is transported by the infusion system 200, the joint 232 may be connected to the liquid interface 221 at the stock solution tank 220, and the third switch valve 233 at the second pipe 231 may be opened to send the chemical stock solution in the stock solution tank 220 to the infusion tank 230 through the second pipe 231.

When the new stock solution tank 220 is replaced after the stock solution tank 220 is used up, the third switch valve 233 may be closed, the joint 232 may be screwed out from the liquid phase joint 221 of the old stock solution tank 220, and then the screwed joint 232 may be inserted into the first joint 2111 of the liquid receiving box 211. The old stock solution barrel 220 is replaced, meanwhile, micro-positive pressure gas is input into the liquid receiving chamber by utilizing the positive pressure gas conveying mechanism 212, the micro-positive pressure gas is discharged from the gas outlet 2113, and gas flow can be formed in the liquid receiving chamber and is placed in the liquid receiving chamber, so that the inner wall of the joint 232 is dedusted, the inner cavity of the joint is in a clean environment, and the pollution probability of the joint 232 is reduced.

The liquid receiving box 211 can receive the residual chemical liquid adhering to the joint 232 and the inner wall of the second pipe 231. In order to reduce the possibility of leakage of chemical liquid or contamination of the joint 232 by received chemical liquid due to excessive collection of liquid in the liquid receiving box 211, with continued reference to fig. 3, a liquid level sensor 2114 is also provided at the liquid receiving box 211. The liquid level in the liquid receiving chamber can be detected by the liquid level sensor 2114, so that an operator can discharge the received chemical liquid out of the liquid receiving chamber in time, and the probability of leakage of the chemical liquid or pollution of the joint 232 is reduced.

After the new stock solution tank 220 is replaced, the positive pressure gas delivery mechanism 212 is closed, the joint 232 is screwed out from the first joint 2111, the screwed joint 232 is screwed with the liquid phase joint 221 of the new stock solution tank 220, and the third switch valve 233 of the second pipeline 231 is opened to deliver new stock solution of chemicals.

By utilizing the infusion system 200 provided by the embodiment of the application, the probability of pollution of the joint 232 in the barrel changing process can be reduced, and the infusion quality of the infusion system 200 is improved.

The fluid receiving means 210, the raw fluid barrel 220 and the fluid delivery cassette 230 of the fluid delivery system 200 provided by the examples of the present application are described in further detail below with reference to the accompanying drawings.

The liquid receiving device 210 is used for placing the joint 232, dust removing protection and bearing the joint 232, and collecting chemical residual liquid dropped at the joint 232. Referring to fig. 4, the liquid receiving apparatus 210 includes a liquid receiving box 211 and a positive pressure gas delivery mechanism 212.

Referring to fig. 3, a liquid receiving chamber (not shown) is provided in the interior of the box body of the liquid receiving box 211, and the box body is provided with a first interface 2111, an air inlet 2112 and an air outlet 2113, which are all communicated with the liquid receiving chamber.

The specific arrangement forms of the liquid receiving chamber and the first interface 2111 in the box body are not limited, and related personnel can correspondingly adjust the liquid receiving chamber and the first interface 2111 according to requirements.

In one possible embodiment, the liquid receiving chamber is a cuboid-shaped receiving area surrounded by a cuboid housing. The rectangular parallelepiped-shaped containment area can receive residual chemical liquid dripping from the joint 232 and contain gas at micro positive pressure for dedusting.

Further, in order to facilitate storage of residual chemical liquid dripping at the joint 232 and reduce the probability of contamination to the joint 232, in a possible embodiment, referring to fig. 3, a liquid storage tube 2115 capable of communicating with the liquid receiving chamber is further provided at the bottom of the case.

Further, a liquid level sensor 2114 may be provided at the upper end of the liquid reservoir 2115 to detect the liquid level at the liquid reservoir 2115.

Further, with continued reference to fig. 3, a first on-off valve 2116 may be provided at the inlet end of the reservoir 2115 and a second on-off valve 2117 may be provided at the outlet end of the reservoir 2115. The operator can open the second open/close valve 2117 to discharge the liquid when the liquid storage tube 2115 is full.

Further, an alarm (not shown) may be provided and communicatively connected to the liquid level sensor 2114, and an alarm may be provided when the liquid level sensor 2114 detects that the liquid level is too high, so that the operator opens the second on-off valve 2117 to discharge the liquid according to the alarm sound.

The first interfaces 2111 are used for connecting the connectors 232 requiring dust removal protection, and in one possible embodiment, a plurality of first interfaces 2111 are provided at the box body of the liquid receiving box 211 for simultaneously placing a plurality of connectors 232.

For example, with continued reference to fig. 3, the liquid receiving box 211 has a rectangular box shape, and two first interfaces 2111 are provided at the top of the box.

The structure of the first interface 2111 may be correspondingly set according to the structure of the joint 232 to be dust-removed and protected, in a possible embodiment, referring to fig. 5, the joint 232 generally includes an inlet section 2321 and an outlet section 2322, where a first thread (not shown in the drawing) is disposed on an inner wall or an outer wall of the inlet section 2321, and the second pipe 231 is sleeved on an outer wall of the outlet section 2322.

In an example, with continued reference to fig. 2 and 3, an outer wall of inlet section 2321 of fitting 232 may be inserted into first interface 2111.

Further, in order to improve the connection strength between the joint 232 and the first interface 2111 during dust removal protection of the joint 232, in a possible embodiment, the first interface 2111 may be provided as a threaded port. For example, the first port 2111 protrudes outside the case, and the outer wall of the first port 2111 is provided with a second screw thread. The second screw thread matched with the first screw thread is arranged on the outer wall of the first interface 2111, so that the joint 232 can be in screw thread connection with the first interface 2111, and the connection strength is improved.

The specific arrangement of the air inlet 2112 and the air outlet 2113 is not limited in this application, and in one possible implementation, please continue to refer to fig. 3, a top portion of the rectangular box body is provided with an air outlet 2113, and the air outlet 2113 is located between the two first interfaces 2111. The air inlet 2112 is provided on the right side of the box.

Further, in an example, a fixing member 2118 may be provided at the back of the rectangular parallelepiped case. The cassette body of the cassette 211 may be fixed at the corresponding infusion apparatus by the fixing members 2118.

By way of example, the fixation member 2118 may include a fixation plate, and threaded holes provided in the fixation plate. When the liquid receiving box 211 is required to be fixed to the infusion box 230, the liquid receiving box 211 can be fixed to the infusion box 230 by screws passing through the threaded holes in the fixing plate and the threaded holes in the infusion box 230.

The positive pressure gas delivery mechanism 212 is configured to be coupled to the gas inlet 2112 for delivering a clean micro-positive pressure gas to the drip chamber.

The specific arrangement of positive pressure gas delivery mechanism 212 is not limited by the present application, and in one possible embodiment, referring to fig. 4, positive pressure gas delivery mechanism 212 includes a gas cylinder 2121, gas cylinder 2121 being coupled to gas inlet 2112 via a first conduit 2122. Gas cylinders are used 2121 to store clean gas, such as high purity nitrogen. Gas cylinder 2121 is provided with a hand valve to facilitate the operator opening gas cylinder 2121 as desired to deliver gas to the liquid receiving chamber.

In one possible embodiment, gas cylinder 2121 may store gas having a slight positive pressure that may be delivered directly to the receiving chamber via first conduit 2122.

Alternatively, when the gas stored in cylinder 2121 is at atmospheric pressure or at a higher pressure, a pressure regulating valve 2123 may be provided at first conduit 2122 for delivering a slightly positive pressure to the receiving chamber.

Further, a relief valve may be provided at the first conduit 2122.

Further, a filter 2124 may be connected between the gas cylinder 2121 and the pressure regulating valve 2123 via a first pipe 2122. By using the filter 2124, the purity of the micro-positive pressure gas input into the liquid receiving chamber can be improved, and the probability of pollution of the joint 232 can be further reduced.

With continued reference to fig. 2, the stock solution barrel 220 is provided with a liquid phase port 221 at the top of the stock solution barrel 220, so that the liquid phase port 221 is connected by a connector 232, and the stock solution in the stock solution barrel 220 is sent to the infusion tank 230 through a second pipeline 231.

Further, referring to fig. 2, a reflux and air supply tank interface is further provided at the top of the stock solution tank 220, and a second connector 232 is connected to the reflux and air supply tank interface and is connected to the infusion tank 230 through a second pipe 231 for performing corresponding reflux and air supply operations. Correspondingly, a second first interface 2111 is provided at the liquid receiving box 211 for dust removal protection of the second connector 232.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. A liquid receiving box, characterized by comprising:

the box body is internally provided with a liquid receiving chamber, and is provided with a first interface, an air inlet and an air outlet; the first interface, the air inlet and the air outlet are communicated with the liquid receiving chamber; the first interface is used for being inserted into a joint of the stock solution barrel; the air inlet is used for being connected with a positive pressure gas conveying mechanism so as to convey positive pressure gas to the liquid receiving chamber; the air outlet is used for discharging the positive pressure air;

and the liquid level sensor is used for detecting the liquid level of the liquid receiving chamber.

2. The liquid receiving box according to claim 1, wherein a liquid storage pipe is arranged at the bottom of the box body, and the liquid storage pipe is communicated with the liquid receiving chamber.

3. The liquid receiving box according to claim 2, wherein the liquid inlet end of the liquid storage pipe is connected with the liquid receiving chamber through a first switch valve, and the liquid outlet end of the liquid storage pipe is provided with a second switch valve.

4. The liquid receiving box according to claim 1, wherein the liquid receiving box is provided with an alarm, and the alarm is in communication connection with the liquid level sensor.

5. The fluid receiving cassette of claim 1, wherein the outer wall of the fluid receiving cassette is provided with a securing member for securing the fluid receiving cassette to an infusion device.

6. A liquid receiving device, comprising:

the liquid receiving cassette of any one of claims 1-5;

and the positive pressure gas conveying mechanism is connected with the gas inlet.

7. The liquid receiving apparatus according to claim 6, wherein the positive pressure gas delivery mechanism includes a gas cylinder connected to the gas inlet port through a first pipe, the first pipe being provided with a pressure regulating valve.

8. The fluid receiving apparatus of claim 7, wherein the positive pressure gas delivery mechanism comprises a filter disposed between the gas cylinder and the pressure regulating valve via the first conduit.

9. An infusion system, comprising:

the fluid receiving means of any one of claims 6-8;

a stock solution barrel with a liquid phase interface;

the infusion box is connected with the joint through a second pipeline, and the second pipeline is provided with a third switch valve; the joint is selectively connected with the liquid phase interface and the first interface; and when the connector is connected with the first interface, the third switch valve is in a closed state.

10. The infusion system of claim 9, wherein the connector has an inlet section and an outlet section; the inner wall of the inlet section is provided with a first thread, and the outer wall of the outlet section is sleeved with the second pipeline; the outer wall of the first interface is provided with second threads matched with the first threads, and the joint is optionally connected with the first interface in a threaded mode.