CN117888335A - Automatic delivery system - Google Patents

Abstract

The invention provides an automatic delivery system, which comprises a closed container or a non-closed container, and a constant volume cavity arranged at one side of the closed container or the non-closed container, wherein a venturi pipette is inserted into the constant volume cavity; a liquid guide pipe for conveying liquid is arranged between the closed container and the constant volume cavity, the bottom of the liquid guide pipe is positioned in the constant volume cavity to form a liquid outlet, the liquid in the closed container is transferred from the liquid outlet structure to the liquid guide pipe under the action of gravity, flows into the constant volume cavity through the liquid outlet at the other end of the liquid guide pipe, rises along with the liquid level in the constant volume cavity until the liquid outlet is blocked to form a constant volume, and when the cleaning electric appliance runs, the liquid in the constant volume cavity is extracted by the venturi bottom liquid suction pipe and is discharged from the water outlet to be conveyed to the cleaning electric appliance. The invention realizes the purpose of manually adjusting the liquid feeding capacity by utilizing the push rod structure, reduces the automatic feeding cost and popularizes the automatic feeding function; the liquid outlet structures for putting liquid into the container are convenient to transport and carry and simple to install.

Description

Automatic delivery system

Technical Field

The invention relates to the field of liquid delivery, in particular to the technical field of washing machines or sweeping robots, and particularly relates to an automatic delivery system.

Background

In the existing market, cleaning appliances such as washing machines are used, users need to add cleaning agents per se every time, and the problems of inaccurate addition amount and complex operation exist.

In order to solve the problem, on the one hand, a plurality of washing machines with intelligent automatic liquid laundry detergent delivery function appear on the market, and the automatic delivery systems mostly rely on controlling the pumping time of an electric pump or a flowmeter to achieve the purpose of quantitative delivery, so that the current automatic delivery systems have higher cost and can only be applied to washing machines at higher ends;

on the other hand, the problem that only a high-end washing machine can be selected for consumers is brought, more cost is spent compared with a common washing machine, the popularity is low, and the popularization is difficult.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide an automatic delivery system for solving the difficulties of the prior art.

To achieve the above and other related objects, the present invention provides an automatic dispensing system, including a closed container 1, wherein the closed container 1 is filled with a liquid to be dispensed, and a liquid outlet structure is provided at one end of the bottom;

the constant volume cavity 3 is internally provided with a liquid suction pipe 16 of the Venturi 2, a water inlet 19 of the Venturi 2 is connected with a water inlet valve of the cleaning electric appliance, and a water outlet 20 of the Venturi 2 is connected with the cleaning electric appliance;

a liquid guide pipe 14 for conveying liquid is arranged between the closed container 1 and the constant volume cavity 3, the bottom of the liquid guide pipe 14 is positioned in the constant volume cavity 3 to form a liquid outlet 15, the liquid in the closed container 1 is transferred from a liquid outlet structure to the liquid guide pipe 14 under the action of gravity, flows into the cavity of the constant volume cavity 3 through the liquid outlet 15 at the other end of the liquid guide pipe 14, and rises along with the liquid level in the constant volume cavity 3 until the liquid outlet 15 is blocked to form a constant volume;

when the cleaning appliance is in operation, the liquid in the constant volume cavity 3 is pumped by the bottom liquid suction pipe 16 of the venturi 2, discharged from the water outlet 19 and conveyed to the cleaning appliance, and a gap is formed between the bottom liquid suction port 17 of the liquid suction pipe 16 and the bottom inner wall of the constant volume cavity 3.

According to a preferred embodiment, the liquid outlet 15 is arranged in a pipette 16;

a floating ball 9 which floats up and down along with the change of the height of the liquid in the constant volume cavity 3 and the change of the pressure in the Venturi tube 2 is arranged below a liquid outlet 15 positioned at the bottom of the flow guide pipe 14 in the liquid suction pipe 16, and the highest position of the floating ball 9 props against the liquid outlet 15 to block the liquid in the closed container 1 from additionally flowing into the constant volume cavity 3;

the inner diameter of the liquid outlet 15 is smaller than the outer diameter of the floating ball 9 and smaller than the inner diameter of the liquid suction pipe 16.

According to the preferred scheme, a push rod structure is arranged on the side, close to the user operation side, of the constant volume cavity 3 to adjust the inner cavity capacity of the constant volume cavity 3;

the push rod structure comprises a piston 4 which is tightly tangent with the inner wall of the constant volume cavity 3, one side of the piston 4 away from the constant volume cavity 3 is sequentially connected with a piston rod 5 and a driving handle 6, and the piston 4 is pushed to move through the driving handle 6 to change the capacity of the constant volume cavity 3.

According to the preferred scheme, a first overflow port 18 higher than the liquid outlet 15 is arranged in the constant volume cavity 3 and receives liquid overflowed from the constant volume cavity 3 when the pressure is increased or the capacity is reduced, and the liquid outlet direction of the first overflow port 18 is connected with the overflow cavity 7.

According to the preferred scheme, the overflow cavity 7 passes through the honeycomb duct 14 through the top through hole 13, and overflow cavity 7 and constant volume chamber 3 intercommunication setting, the internal diameter of top through hole 13 is greater than the external diameter of honeycomb duct 14 to guarantee the balance of air internal and external pressure.

According to a preferred solution, the bottom of the overflow chamber 7 is provided with a duckbill valve 8, the duckbill valve 8 circulates unidirectionally, and the liquid in the overflow chamber 7 is transferred from the overflow chamber 7 towards the constant volume chamber 3 when the liquid is required to be replenished in the constant volume chamber 3.

According to a preferred embodiment, the bottom of the constant volume chamber 3 is arranged such that the submerged structure 22 forms the lowest point of the constant volume chamber 3, and the liquid suction port 17 and the duckbill valve 8 are both arranged in the submerged structure 22.

According to the preferred scheme, the top of the liquid inlet 11 is arranged to be inserted into the liquid outlet structure in a conical structure, liquid inlet through holes 12 are arranged on the periphery of the conical structure to guide out liquid in the closed container 1, and a sealing ring 10 is sleeved at the bottom of the conical structure and is in closed connection with the inner wall of the liquid outlet structure.

According to a preferred solution, the solution outlet structure comprises:

the liquid outlet through hole 107 is formed at the bottom of the closed container 1, and a boss 103 protruding out of the bottom of the closed container 1 is formed downwards around the periphery of the liquid outlet through hole 107;

the concave hole 105 is formed in the boss 103 in a hollow mode, the concave hole 105 is communicated with the liquid outlet through hole 107, and the top of the concave hole 105 faces the inner part to form an edge 108 horizontally;

and the plugging unit is arranged in the concave hole 105 and plugs the liquid outlet through hole 107 under the action of no external pressure.

According to a preferred embodiment, the horizontal end of the hermetic container 1 is hermetically connected with a sealing cap 102.

According to a preferred embodiment, the plugging unit comprises:

a hole plug 104, wherein the hole plug 104 is plugged upwards from a bottom concave hole 105 of the boss 103 and is propped against an edge 108 formed on one side of the boss 103 close to the liquid outlet through hole 107;

and a first stop valve 106, wherein the first stop valve 106 is attached to the liquid outlet through hole 107.

According to a preferred embodiment, the first stop valve 106 is sealed with a sheet.

According to a preferred scheme, the plugging unit adopts a second stop valve 118, and the second stop valve 118 is arranged in the liquid outlet through hole 107;

a valve seat 119 of the second stop valve 118 is positioned below the liquid outlet through hole 107, and is in sealing connection with the concave hole 105 through a stop valve sealing ring 117, and a valve port 116 with a downward opening is formed in the valve seat 119 and is in interference connection with the guide pipe 14;

the valve body 109 of the second stop valve 118 is arranged above the liquid outlet through hole 107, a small cover plate 110, a valve body spring 111 and a valve body plug 112 are arranged in the valve body 109 from top to bottom, and the small cover plate 110 is buckled and covered on the top of the valve body 109 through small cover plate buckles 114 arranged on the periphery of the bottom and vertical through holes 115 on the periphery of the valve body 109;

the valve plug 112 is clamped in the liquid outlet through hole 107 under the action of the valve spring 111 under the condition of no external force.

According to a preferred embodiment, the bottom of the valve body 109 extends around to form a valve body fastener 113, and the valve body fastener 113 is fastened to the edge 108 to prevent falling off.

An automated delivery system, comprising:

a non-closed container 100, wherein the non-closed container 100 is filled with the liquid to be put in, and the bottom extends outwards to form a bottom liquid outlet 1500;

a constant volume cavity 3, a liquid suction pipe 16 on the Venturi 2 is inserted into the constant volume cavity 3, a gap is reserved between a liquid suction port 17 at the bottom of the liquid suction pipe 16 and the bottom of the constant volume cavity 3, and a liquid outlet 1500 at the bottom is inserted into the constant volume cavity 3 to guide liquid in the non-closed container 100;

the balance air pressure pipe 800 is connected to the top of the constant volume cavity 3, the other end of the balance air pressure pipe 800 is higher than the non-closed container 100, and the air pressure in the constant volume cavity 3 is balanced through the balance air pressure pipe 800.

According to a preferred embodiment, the inner diameters of the balance air pressure pipe 800 and the pipette at the upper end of the constant volume chamber 3 are as small as possible, and the bottom area of the non-closed container 100 is as large as possible.

According to a preferred embodiment, the venturi 2 is arranged higher than the non-closed container 100.

According to a preferred embodiment, the constant volume chamber 3 forms a submerged structure 22 at the bottom of the pipette 16 of the venturi 2.

According to a preferred embodiment, the bottom outlet 1500 is provided in the pipette 16 of the venturi 2;

a floating ball 9 which floats up and down along with the change of the height of the liquid in the constant volume cavity 3 and the change of the pressure in the venturi 2 is arranged below the bottom liquid outlet 1500 in the liquid suction pipe 16, and the highest position of the floating ball 9 props against the bottom liquid outlet 1500 to block the liquid in the non-closed container 100 from additionally flowing into the constant volume cavity 3;

the inner diameter of the bottom liquid outlet 1500 is smaller than the outer diameter of the floating ball 9 and smaller than the inner diameter of the liquid suction pipe 16.

According to the preferred scheme, a push rod structure is arranged on the side, close to the user operation side, of the constant volume cavity 3 to adjust the inner cavity capacity of the constant volume cavity 3;

the push rod structure comprises:

the second piston rod 500 is horizontally arranged in a channel on one side of the constant volume cavity 3 far away from the non-closed container 100, the second piston rod 500 is coaxially provided with a liquid channel 200, two ends of which are provided with second overflow ports 1600, the inside of which is communicated with the constant volume cavity 2, one end of the second piston rod 500 far away from the non-closed container 100 is in sealing connection with the overflow pipe 900, and after the second piston rod 500 moves towards the constant volume cavity 3 to reduce the volume, the liquid in the constant volume cavity 3 is conveyed into the overflow pipe 900 and the non-closed container 100 through the liquid channel 200;

the elastic piston structure is arranged in one side of the liquid channel 200, which is close to the constant volume cavity 3, and when the content of the constant volume cavity 3 is reduced, the pressure is increased, and the elastic piston structure is extruded to be filled with redundant liquid in the constant volume cavity 3;

the second piston 400 is sleeved on one end of the second piston rod 500 positioned in the constant volume cavity 3, and moves tangentially with the inner wall of the constant volume cavity 3 along with the movement of the second piston rod 500;

the second driving handle 600 is sleeved on one end of the second piston rod 500, which is far away from the constant volume cavity 3, and is positioned outside the constant volume cavity 3, and the second driving handle 600 pushes the second piston rod 500 to move.

According to a preferred aspect, the elastic piston structure comprises:

the piston cavity is arranged in one end of the liquid channel 200 positioned in the constant volume cavity 3, and through holes are formed in two sides of the piston cavity;

a piston cap 300 and a piston spring 1000, the piston cap 300 and the piston spring 1000 being installed in sequence in a direction away from the non-hermetic container 100;

the inner diameters of the through holes in the piston cavity, which are positioned at the two sides of the piston plug 300 and the piston spring 1000, are smaller than the outer diameter of the piston plug 300.

According to a preferred embodiment, a side of the non-hermetic container 100 is provided with a liquid-filled opening/closing cap 700.

According to the invention, through the cooperation of the airtight or non-airtight container, the constant volume cavity, the overflow cavity and the flow guide pipe, the purpose of manually adjusting the liquid feeding capacity is realized by utilizing the push rod structure, the automatic feeding cost is reduced, the automatic feeding function is popularized, and the problem that an electric pump and a flowmeter are not needed to achieve quantitative feeding is also solved;

in addition, two liquid outlet structures for putting liquid into the container are provided, so that the liquid outlet structure is convenient to transport and carry, simple in installation, ingenious in structure and low in cost, and has the effect of being more suitable for use in daily life.

Preferred embodiments for carrying out the present invention will be described in more detail below with reference to the attached drawings so that the features and advantages of the present invention can be easily understood.

Drawings

FIG. 1 is a schematic view showing the structure of a first embodiment;

FIG. 2 is a schematic view of a partially enlarged structure of an embodiment in an inactive state;

FIG. 3 is a schematic view showing a partially enlarged structure in an operating state according to an embodiment;

fig. 4 is a schematic perspective view of a closed container according to the first embodiment;

fig. 5 shows a left side view of the closed container according to the first embodiment;

FIG. 6 is a cross-sectional view of D-D of FIG. 5;

FIG. 7 is an enlarged view of a portion of FIG. 6;

fig. 8 is a schematic perspective view of a closed container according to a second embodiment;

fig. 9 is a left side view of the closed container according to the second embodiment;

FIG. 10 is a cross-sectional view of E-E of FIG. 9;

FIG. 11 is an enlarged view of a portion of FIG. 10;

FIG. 12 is a partial enlarged view showing the insertion of a closed vessel into a draft tube in the second embodiment;

fig. 13 is an enlarged view showing a three-dimensional structure of a second stop valve in the second embodiment;

fig. 14 is a front view of fig. 13;

FIG. 15 shows a cross-sectional view of F-F of FIG. 14;

fig. 16 is a schematic view showing the structure of the third embodiment;

FIG. 17 is a partially enlarged schematic view of the third embodiment in an inactive state;

FIG. 18 is a partially enlarged schematic view of the third embodiment in an operating state;

FIG. 19 is a schematic view showing a partial enlarged structure of a third embodiment when the constant volume cavity is reduced;

description of the reference numerals

1. A closed container; 2. a venturi; 3. a constant volume cavity; 4. a first piston; 5. a first piston rod; 6. a first driving handle; 7. an overflow chamber; 8. a duckbill valve; 9. a floating ball; 10. a seal ring; 11. a liquid inlet; 12. a liquid inlet through hole; 13. a top through hole; 14. a flow guiding pipe; 15. a liquid outlet; 16. a pipette; 17. a liquid suction port; 18. a first overflow port; 19. a water inlet; 20. a water outlet; 21. a valve mouth; 22. a sinking structure;

102. sealing cover; 103. a boss; 104. a hole plug; 105. concave holes; 106. a first stop valve; 107. a liquid outlet through hole;

108. edges; 109. a valve body; 110. a small cover plate; 111. a valve body spring; 112. a valve body plug; 113. the valve body is buckled; 114. the small cover plate is buckled; 115. a vertical through hole; 116. a valve port; 117. a stop valve seal ring; 118. a second stop valve; 119. a valve seat;

100. a non-closed container; 200. a liquid channel; 300. a piston plug; 400. a second piston; 500. a second piston rod;

600. a second driving handle; 700. opening and closing the cover; 800. balancing an air pressure pipe; 900. an overflow pipe; 1000. a second piston spring; 1500. a bottom liquid outlet; 1600. and a second overflow port.

Detailed Description

In order to make the objects, technical solutions and advantages of the technical solutions of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.

Possible embodiments within the scope of the invention may have fewer components, have other components not shown in the drawings, different components, differently arranged components or differently connected components, etc. than the examples shown in the drawings. Furthermore, two or more of the elements in the figures may be implemented in a single element or a single element shown in the figures may be implemented as multiple separate elements.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

The invention provides an automatic throwing system which is used for equipment needing throwing liquid, the type of the equipment is not limited, but the automatic liquid throwing structure is particularly suitable for washing machines in cleaning appliances or sweeping and dragging robots with base stations and the like.

Example 1

Referring to the figure, the automatic delivery system provided in the first embodiment mainly includes a sealed container 1 and a constant volume cavity 3 which are loaded with the liquid to be delivered in advance, a liquid outlet structure capable of discharging the liquid is arranged at the bottom of the sealed container 1, a liquid suction pipe 16 of a venturi 2 is inserted into the constant volume cavity 3, a water inlet 19 of the venturi 2 is connected with a water inlet valve of a cleaning electric appliance, and a water outlet 20 is connected with the cleaning electric appliance;

when the liquid quantitative storage device is used, liquid in the closed container 1 is quantitatively stored in the constant volume cavity 3, the liquid quantitative storage device is achieved through the guide pipe 14 which plays a role in transferring liquid connection between the closed container 1 and the constant volume cavity 3, one end of the guide pipe 14 is positioned in the closed container 1 to form the liquid inlet 11, the other end of the guide pipe is positioned in the constant volume cavity 3 to form the liquid outlet 15, the liquid in the closed container 1 is transferred from the liquid outlet structure to the guide pipe 14 under the action of gravity, flows into the cavity of the constant volume cavity 3 through the liquid outlet 15 at the other end of the guide pipe 14, and along with the rising of the liquid level in the constant volume cavity 3, when the liquid level in the constant volume cavity is higher than the liquid outlet, the liquid seals the liquid outlet, gas cannot enter the closed container, the liquid in the closed container cannot flow out, and the liquid level in the constant volume cavity is constant at the moment, so that the purpose of constant volume is achieved;

when the cleaning appliance is in operation, after the water inlet valve is opened, tap water flows in from the water inlet 19 of the venturi 2 and flows out from the water outlet 20, at the moment, venturi phenomenon occurs, the liquid in the constant volume cavity 3 is sucked out by the liquid suction pipe 16, and the liquid flows into the machine from the water outlet 20 along with water flow.

As shown in fig. 2, in order to prevent the liquid in the constant volume cavity 3 from being sucked away and flowing into the constant volume cavity 3 again in the process of lowering the liquid level, the liquid in the closed container 1 starts to flow into the constant volume cavity 3, so that the liquid to be thrown in increases, the liquid outlet 15 of the flow guide pipe 14 can be arranged in the liquid suction pipe 16 of the venturi 2, the floating ball 9 which floats up and down along with the change of the liquid level in the constant volume cavity 3 and the change of the pressure in the venturi 2 is arranged below the liquid outlet 15 positioned at the bottom of the flow guide pipe 14 in the liquid suction pipe 16, wherein the inner diameter of the liquid outlet 15 is smaller than the outer diameter of the floating ball 9 and smaller than the inner diameter of the liquid suction pipe 16, as shown in fig. 3, when the venturi 2 sucks liquid, the floating ball 9 resists the liquid outlet 15 upwards under the action of negative pressure in the liquid suction pipe 16 and the thrust of the liquid flow, so that the liquid in the closed container 1 can not flow out when the venturi 2 works, and the rest of the liquid is transferred upwards through the gap between the floating ball 9 and the liquid suction pipe 16.

As shown in fig. 1, it should be further noted that the liquid volume in the constant volume cavity 3, that is, the liquid delivery volume, may be adjusted by using a push rod structure, where the push rod structure includes a first piston 4 that is closely tangent to the inner wall of the constant volume cavity 3, and one side of the first piston 4 away from the constant volume cavity 3 is sequentially connected with a first piston rod 5 and a first driving handle 6, and the first driving handle 6 pushes the first piston 4 to move to change the volume of the constant volume cavity 3;

it should be noted that, in the process of adjusting the push rod structure by the user, in order to avoid the situation that the volume of the constant volume cavity 3 is reduced, so that excessive liquid in the constant volume cavity 3 does not flow away; or after the ambient temperature rises, the situation that the air pressure in the closed container is increased and more liquid is pressed out to enter the constant volume cavity is avoided; at this time, a first overflow port 18 is required to be arranged in the constant volume cavity 3, and is used for discharging liquid overflowed when the pressure in the constant volume cavity 3 is increased or the volume is reduced, and the liquid discharged from the first overflow port 18 is collected by an overflow cavity 7 communicated with the first overflow port 1, as shown in fig. 2;

in addition, the height of the first overflow port 18 is higher than that of the liquid outlet 15, because the liquid in the closed container 1 cannot flow out when the liquid level seals the liquid outlet, similar to the communicating vessel principle of the smart seat of the water dispenser, so the constant volume, the liquid level line in the 3 is just slightly higher than the liquid outlet 15, the first overflow port 18 is slightly higher than the liquid level line, or else the liquid continuously flows into the overflow cavity 7 from the first overflow port 18;

when the ambient temperature rises, the gas in the closed container 1 expands when heated, the liquid in the closed container 1 is pressed out to release the pressure in the closed container 1, and if no overflow port exists, the liquid level in the constant volume cavity 3 rises (the rising height increases along with the increase of the temperature difference), so that the constant volume cavity 3 is inaccurate in quantification, after the first overflow port 18 exists, the liquid exceeding the normal liquid level line flows into the overflow cavity 7, the pressure in the closed container 1 is released, and the liquid in the closed container 1 can not flow out any more.

It should be noted that, during the pushing process of the push rod structure, the pressure in the system changes, for this reason, a one-way circulation duckbill valve 8 is also installed in the bottom of the overflow cavity 7, the valve mouth 21 of the duckbill valve 8 is set towards the constant volume cavity 3, the duckbill valve 8 adopts a one-way valve, the liquid can only be transferred from the overflow cavity 7 towards the constant volume cavity 3, and the liquid in the overflow cavity 7 is transferred into the constant volume cavity 3 by the duckbill valve 8;

on the basis, in order to ensure smooth circulation of the liquid, the lowest point of the constant volume cavity 3 is arranged as a sinking structure 22, and the liquid suction port 17 and the duckbill valve 8 are arranged in the sinking structure 22, so that the duckbill valve 8 is conveniently arranged on one hand, the liquid in the constant volume cavity 3 is emptied as much as possible by the liquid suction pipe 16, and the liquid in the overflow cavity 7 is emptied as much as possible by the duckbill valve 8.

As shown in fig. 1, 2 and 3, the overflow chamber 7 provided in this embodiment passes through the flow guide tube 14, for this purpose, a top through hole 13 larger than the outer diameter of the flow guide tube 14 is provided at the position of the overflow chamber 7 corresponding to the position where the flow guide tube 14 passes through, so as to ensure the balance of the internal pressure and the external pressure of the system, in addition, as shown in fig. 6 and 7, the liquid inlet 11 needs to be inserted into one end of the flow guide tube 14 in the liquid outlet structure, the liquid inlet 11 is configured to be tapered so as to be conveniently inserted into the liquid outlet structure, the liquid inlet through hole 12 is arranged on the outer periphery of the tapered structure, the liquid in the closed container 1 can be introduced from the liquid inlet through hole 12, and the sealing ring 10 is sleeved at the bottom of the tapered structure so as to achieve the purpose of being in airtight connection with the inner wall of the liquid outlet structure.

As described above, according to fig. 4-7, a liquid outlet structure is provided below the closed container 1 corresponding to the liquid inlet 11 at one end of the guide pipe 14, in this embodiment, a liquid outlet structure is provided, which is convenient to transport, has no liquid leakage during transportation, and is quick in installation, firstly, a liquid outlet through hole 107 is formed at the bottom of the closed container 1, and a boss 103 protruding out of the bottom of the closed container 1 is formed around the periphery of the liquid outlet through hole 107 downward to form a structure connecting the end of the guide pipe 14; the inside cavity of boss 103 forms shrinkage pool 105, communicates between shrinkage pool 105 and the play liquid through-hole 107 for reverse stopper hole stopper 104 from the bottom of boss 103 is used for plugging up the structure of trompil, and in addition, the top of shrinkage pool 105 forms edge 108 towards inside level, utilizes the support of hole stopper 104 when the installation to establish, plays the structure that supports spacing, prevents interference installation, destroys the No. one stop valve 106 that adopts the thin slice to seal on the play liquid through-hole 107 that attaches.

(1) Regarding the installation procedure of the closed vessel 1:

as shown in fig. 1-7, when a user needs to install the closed container 1 filled with liquid, the hole plug 14 needs to be taken out first, then the closed container is inserted into a machine, the first stop valve 106 sealed by a thin sheet is punctured in the concave hole 15 of the liquid inlet 11 of the conical structure at the top of the guide pipe 14, so as to achieve the purpose of the cavity of the closed container 1, the bottom of the conical structure at the top of the guide pipe 14 is sleeved with the sealing ring 10, and the sealing effect is achieved by using the interference installation between the sealing ring 10 and the wall of the concave hole 15.

(2) Regarding the flow of liquid volume adjustment in the constant volume chamber 3 before use:

as shown in fig. 1 and 2, before the machine is started, the adding amount of the cleaning agent is adjusted according to the concentration multiple of the cleaning liquid and the quantity of the washings, the first piston 4 can be pushed by the first driving handle 6, and the size of the constant volume cavity 3 is changed to achieve the aim of adjustment; in addition, the side of the first driving handle 6 is also provided with capacity graduation marks, so that the user can know the capacity in the constant-volume cavity 3 at the moment.

(3) Regarding the flow of liquid into the constant volume chamber 3:

as shown in fig. 1 and 2, the cleaning solution in the closed container 1 flows out through the solution inlet through hole 12, flows out from the solution outlet 15 into the liquid suction pipe 16 along the flow guide pipe 14, and flows into the constant volume cavity 3 from the liquid suction port 17; when the liquid level exceeds the liquid outlet 15, air cannot enter the closed container 1 from the liquid outlet 15, and at the moment, the liquid in the container is not discharged any more, so that a fixed amount of liquid is always kept in the constant volume cavity 3.

(4) Regarding the flow of liquid to the machine:

as shown in figure 3, when the machine is in operation and cleaning liquid needs to be added, the water inlet electromagnetic valve on the machine is opened, water flows in from the water inlet 19 of the venturi 2, the venturi effect can occur at the moment, the cleaning liquid in the constant volume cavity 3 can be sucked into the venturi tube and flows into the machine from the water outlet 20 along with the water flow, at the moment, the floating ball 9 in the liquid suction tube 16 can move upwards under the pushing of negative pressure and liquid to support the liquid outlet 15, so that when the machine sucks the liquid in the constant volume cavity 3, the liquid in the closed container 1 can not flow into the constant volume cavity 3 until the material is completely added, and the electromagnetic valve connected with the water inlet 19 is closed.

(5) The presence of a large temperature difference with respect to the environment results in a change in the liquid in the system:

once a large temperature difference occurs in the environment, the air in the closed container 1 expands, and the liquid in the closed container 1 is additionally pressed into the constant volume cavity 3, so that the liquid in the constant volume cavity 3 and the measured amount are in and out, and the first overflow port 18 starts to work at the moment, and the liquid flowing into the constant volume cavity 3 due to the temperature difference flows into the overflow cavity 7 through the first overflow port 18;

in addition, since the size values of the overflow cavity 7 in the length direction and the width direction are far greater than the size value of the constant volume cavity 3, the liquid level flowing into the overflow cavity 7 is relatively low and far less than the liquid level in the constant volume cavity 3, and the liquid in the overflow cavity 7 cannot flow into the constant volume cavity 3 through the duckbill valve 8 until the liquid in the constant volume cavity 3 is completely absorbed, and the liquid in the overflow cavity 7 cannot flow into the constant volume cavity through the duckbill valve 8 because the valve mouth 21 of the duckbill valve 8 is locked by the large liquid level difference between the two;

(6) Adjusting the volume of the constant volume chamber 3 with respect to the user results in a change in the liquid in the system:

the user pulls the first piston 4 to increase the capacity of the constant volume cavity 3, but the liquid level in the constant volume cavity 3 cannot be changed, or the liquid outlet 15 is just sealed, if the user pushes the first piston 4 again at this time to reduce the capacity of the constant volume cavity 3, the redundant liquid can flow into the overflow cavity 7 from the first overflow port 18 for storage.

Embodiment two:

in the second embodiment, on the basis of the first embodiment, only the structure of the plugging unit is changed, and as shown in fig. 8 to 11, the plugging unit adopts a No. two stop valve 118, and the No. two stop valve 118 comprises a valve body 109 and a valve seat 119 which are integrally arranged from top to bottom.

As shown in fig. 13, 14 and 15, on one hand, the valve seat 119 is located below the liquid outlet through hole 107, and an interference connection is formed between the sealing ring 117 of the stop valve sleeved on the periphery of the valve seat 119 and the inner wall of the concave hole 105 to play a sealing role, and when the valve seat 119 is also corresponding to the structure of the valve port 116 with downward opening, which forms interference connection with the flow guide pipe 14;

on the other hand, the valve body 109 is arranged above the liquid outlet through hole 107, the valve body buckle 113 formed by extending the periphery of the bottom of the valve body 109 is buckled on the edge 108 to form a structure for preventing falling off from the liquid outlet through hole 107, the valve body 109 is internally provided with a small cover plate 110, a valve body spring 111 and a valve body plug 112 from top to bottom, the small cover plate 110 is buckled on the top of the valve body 109 through the small cover plate buckle 114 arranged on the periphery of the bottom and the vertical through hole 115 of the periphery of the valve body 109, the valve body spring 111 and the valve body plug 112 propped against the valve body spring 111 are arranged below the small cover plate 110 in the valve body 109, and under the condition of no external force, the valve body plug 112 is clamped in the liquid outlet through hole 107 under the action of the valve body spring 111 so as to achieve the purpose of blocking the liquid outlet through hole 107, and prevent liquid in the sealed container 1 from flowing out in the transportation process, thereby playing a role of sealing;

it should be noted that, as shown in fig. 12 and 14, vertical through holes 115 are formed on the circumference of the valve body 14 at intervals, so as to serve the purpose of guiding the liquid in the closed container 1, and the outer diameter of the valve body plug 112 is not greater than the diameter of the inner cavity of the valve body 109, when the user inserts the closed container 1 filled with the liquid into the machine, the valve body plug 112 is pushed upwards by the force of the head of the guiding pipe 14, the valve body plug 112 leaves the liquid outlet through hole 107 to form a gap, the liquid in the closed container 1 can flow into the liquid outlet through hole 107 along the vertical through hole 115 on the valve body 109 and the gap between the valve body 109 and the valve body plug 112, so as to reach the inside of the guiding pipe 14, and at this time, the sealing ring 10 on the guiding pipe 14 is in interference sealing with the wall of the valve port 116, so that leakage cannot occur;

when the user pulls out the container, the valve plug 112 is reset under the action of the valve spring 111, and the outlet liquid through hole 107 is plugged again.

Example III

The third embodiment adopts the structure of the non-closed container 100 based on the first and second embodiments, but the liquid outlet structure for dispensing liquid from the bottom of the container in the first and second embodiments is equally applicable to the non-closed container 100, and the bottom of the non-closed container 100 extends outwards to form the bottom liquid outlet 1500 based thereon.

In order to provide the non-closed container 100 with the purpose of enabling the user to add liquid by himself, a liquid-adding opening/closing cover 700 is provided on a side surface of the non-closed container 100 close to the operation surface.

As shown in fig. 16 and 17, a constant volume cavity 3 is also arranged below the non-closed container 100, a liquid suction pipe 16 of a venturi 2 is vertically inserted into the constant volume cavity 3, the venturi 2 is higher than the non-closed container 100, and liquid flowing out of the non-closed container 100 flows into the constant volume cavity 3 through a bottom liquid outlet 1500;

when the cleaning electric appliance is operated, after the water inlet valve is opened, tap water flows in from the water inlet 19 of the Venturi 2 and flows out from the water outlet 20, at the moment, a Venturi phenomenon occurs, the liquid suction pipe 16 can suck out liquid in the constant volume cavity 3, and for the convenience of liquid suction, a gap is reserved between the liquid suction port 17 at the bottom of the Venturi 2 and the bottom of the constant volume cavity 3, or the constant volume cavity 3 is positioned at the bottom of the liquid suction pipe 16 of the Venturi 2 to form a sinking structure 22, so that structural guarantee is provided for the gap, and the purpose that the liquid flows into a machine along with water flow from the water outlet 20 is achieved.

As shown in fig. 17 and 18, in order to prevent the liquid in the constant volume cavity 3 from being sucked away and the liquid level from falling, the liquid in the non-closed container 100 starts to flow into the constant volume cavity 3 again, so that the liquid to be thrown in increases, a bottom liquid outlet 1500 may be disposed in a liquid suction pipe 16 of the venturi 2, a floating ball 9 floating up and down along with the change of the liquid level in the constant volume cavity 3 and the change of the pressure in the venturi 2 is disposed below the bottom liquid outlet 1500 in the liquid suction pipe 16, specifically:

when the venturi 2 does not work, the liquid in the non-closed container 100 flows into the constant volume cavity 3 until the liquid level in the balance air pressure pipe 800 and the liquid suction pipe 16 is level with the liquid level in the non-closed container 100, similar to a communicating vessel principle;

when the venturi 2 works, along with the rising of the liquid level in the constant volume cavity 3, the floating ball 9 in the liquid suction pipe 16 rises along with the rising of the liquid level until the bottom liquid outlet 1500 is blocked, the highest position of the floating ball 9 props against the bottom liquid outlet 1500 to block the non-closed container 100 and no more redundant liquid flows out, and the inner diameter of the bottom liquid outlet 1500 is smaller than the outer diameter of the floating ball 9 and smaller than the inner diameter of the liquid suction pipe 16, so that a gap exists between the liquid suction pipe 16 and the floating ball 9, and because attractive force is generated at the top after the venturi 2 starts to work, the liquid in the bottom constant volume cavity 3 is pumped upwards, and the purpose of transferring the liquid from the gap to a machine is realized.

As shown in fig. 19, in order to realize the purpose of adjusting the capacity in the constant volume cavity 3, a push rod structure is installed on one side of the constant volume cavity 3 far from the non-closed container 100, the push rod structure comprises a second piston rod 500 horizontally arranged in a channel on one side of the constant volume cavity 3 far from the non-closed container 100, two overflow ports 1600 are coaxially arranged in the second piston rod 500, the purpose of flowing out the liquid in the constant volume cavity 3 can be realized by a liquid channel 200 with two ends provided with two overflow ports 1600 and internally communicated with the constant volume cavity 2, one end of the second piston rod 500 far from the non-closed container 100 is in sealing connection with an overflow pipe 900 for discharging redundant liquid in the constant volume cavity 3, a second piston 400 tangentially arranged with the inner wall of the constant volume cavity 3 is sleeved outside one end near the non-closed container 100, and the purpose of limiting the capacity of the constant volume cavity 3 is realized by utilizing the tightly tangential structure of the second piston 400 and the inner wall of the constant volume cavity 3; the driving source is from a second driving handle 600 sleeved on one end of the second piston rod 500 far away from the constant volume cavity 3, the overflow pipe 900 is a flexible pipe, and the overflow pipe 900 moves along with the second piston rod 500 and is deformable.

In order to prevent the end of the second piston rod 500 from being closed when the capacity does not need to be adjusted, an elastic piston structure is installed in one side of the liquid channel 200, which is close to the constant volume chamber 3, when the capacity of the constant volume chamber 3 is reduced, the pressure is increased, the elastic piston structure is extruded to be filled with redundant liquid in the constant volume chamber 3, and in the specific structure, referring to fig. 18 and 19, a piston cavity is formed in one end of the liquid channel 200, which is located in the constant volume chamber 3, for forming an inner cavity structure for loading the piston plug 300 and the piston spring 1000, the inner diameters of through holes in the piston cavity, which are located at two sides of the piston plug 300 and the piston spring 1000, are smaller than the outer diameters of the piston plug 300, when the pressure is increased, the piston plug 300 compresses the piston spring 1000 to flow in the liquid, and after the pressure is restored to be balanced, the piston plug 300 is restored to the original state to block the inlet of the liquid channel 200.

Further, when the space in the constant volume cavity 3 is reduced, the redundant liquid flows in from the overflow port 1600, moves towards the overflow pipe 900 through the liquid channel 200, and flows back to the non-closed container 100; in addition, in order to ensure the air pressure balance after the constant volume cavity 3 is full of the liquid, an air pressure balance pipe 800 is connected between the top of the constant volume cavity 3 and the top of the non-closed container 100, and after the constant volume cavity 3 is full of the liquid, the liquid rises along the air pressure balance pipe 8 until the liquid level in the non-closed container 1 is level; further, in order to prevent the liquid flowing into the balance air pressure tube 8 from affecting the variable, the accuracy of the constant volume is increased, the diameter of the liquid suction tube 16 above the constant volume cavity 3 and the inner diameter of the balance air pressure tube 8 are small enough, the bottom area of the corresponding non-closed container 100 is large enough, in the specific embodiment, the diameter of the balance air pressure tube 8 is 2mm, and the liquid in the liquid suction tube above the balance air pressure tube 8 and the constant volume cavity 3 is at most 0.3ml, that is, the error is at most 0.3ml, so that the liquid suction tube is very accurate.

(1) Flow of adjustment of liquid volume in non-closed container 100:

before the machine is started, the adding amount of the cleaning agent can be adjusted according to the actual requirement, the concentration multiple of the cleaning solution and the amount of the washing object, the second piston 400 can be pushed by the second driving handle 600, and the size of the constant volume cavity 3 is changed to achieve the purpose of adjusting the capacity; in addition, capacity graduation marks can be arranged on the edge of the second driving handle 600, so that a user can know the capacity in the constant volume cavity 3 at the moment.

The user can fill the non-hermetic container 100 with the primary liquid by opening the opening/closing cap 700, so that the user can be ensured not to fill the non-hermetic container 100 with the liquid again for a long time.

(2) Regarding the flow of liquid into the constant volume chamber 3:

as shown in fig. 16, 17 and 18, the cleaning solution in the non-closed container 100 flows out through the bottom liquid outlet 1500, flows into the constant volume cavity 3 from the liquid suction port 17 along the liquid suction pipe 16, and after the constant volume cavity 3 is full of the cleaning solution, the cleaning solution rises along the balance air pressure pipe 800 until the cleaning solution is level with the liquid level in the non-closed container 100.

(3) Regarding the flow of liquid to the machine:

as shown in fig. 18, when the machine is in operation and cleaning solution is required to be added, the water inlet electromagnetic valve on the machine is opened, water flows in from the water inlet 19 of the venturi 2, at this time, venturi effect occurs, cleaning solution in the constant volume cavity 3 can be sucked into the venturi 2 pipe and flows into the machine from the water outlet 20 along with the water flow, at this time, the floating ball 9 in the liquid suction pipe 16 can move upwards under the pushing of negative pressure and the liquid to support the bottom liquid outlet 1500, so that when the machine sucks the liquid in the constant volume cavity 3, the liquid in the non-closed container 100 can not flow into the constant volume cavity 3 until the addition is completed, and the electromagnetic valve connected with the water inlet 19 is closed.

(4) Adjusting the volume of the constant volume chamber 3 with respect to the user results in a change in the liquid in the system:

as shown in fig. 16, the user can increase the capacity of the constant volume cavity 3 by pulling the second piston 400, if the user pushes the second piston 400 to decrease the capacity of the constant volume cavity 3, the excessive liquid flows into the non-closed container 100 from the balance air pressure pipe 800 and the overflow pipe 900, at this time, the liquid pushes the piston plug 300 open due to the increase of the liquid pressure, the liquid flows into the liquid channel 200 from the second overflow port 1600, then flows into the non-closed container 100 along the overflow pipe 900, and after the excessive liquid flows into the non-closed container 100, the piston plug 300 is pushed against the second overflow port 1600 again under the action of the second piston spring 1000.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (11)

1. An automatic delivery system, comprising:

the device comprises a closed container (1), wherein the closed container (1) is filled with liquid to be put in, and a liquid outlet structure is arranged at one end of the bottom;

the constant volume cavity (3), the liquid suction pipe (16) of the Venturi (2) is inserted into the constant volume cavity (3), the water inlet (19) of the Venturi (2) is connected with the water inlet valve of the cleaning electric appliance, and the water outlet (20) is connected with the cleaning electric appliance;

a liquid guide pipe (14) for conveying liquid is arranged between the closed container (1) and the constant volume cavity (3), the bottom of the liquid guide pipe (14) is positioned in the constant volume cavity (3) to form a liquid outlet (15), the liquid in the closed container (1) is transferred from a liquid outlet structure to the liquid guide pipe (14) under the action of gravity, flows into the cavity of the constant volume cavity (3) through the liquid outlet (15) at the other end of the liquid guide pipe (14), and rises along with the liquid level in the constant volume cavity (3) until the liquid outlet (15) is blocked to form a constant volume;

when the cleaning electric appliance runs, the liquid in the constant volume cavity (3) is extracted by the liquid suction pipe (16) at the bottom of the venturi (2) and is discharged from the water outlet (19) to be conveyed to the cleaning electric appliance, and a gap is formed between the liquid suction port (17) at the bottom of the liquid suction pipe (16) and the inner wall at the bottom of the constant volume cavity (3).

2. Automatic delivery system according to claim 1, characterized in that the liquid outlet (15) is provided in a pipette (16);

a floating ball (9) which floats up and down along with the change of the height of the liquid in the constant volume cavity (3) and the change of the pressure in the venturi (2) is arranged below a liquid outlet (15) positioned at the bottom of the flow guide pipe (14) in the liquid suction pipe (16), and the highest position of the floating ball (9) props against the liquid outlet (15) to block the liquid in the closed container (1) from additionally flowing into the constant volume cavity (3);

the inner diameter of the liquid outlet (15) is smaller than the outer diameter of the floating ball (9) and smaller than the inner diameter of the liquid suction pipe (16).

3. The automatic delivery system according to claim 1, characterized in that the constant volume chamber (3) is provided with a push rod structure on the side close to the user operation for adjusting the inner volume of the constant volume chamber (3);

the push rod structure comprises a piston (4) which is tightly tangent with the inner wall of the constant volume cavity (3), one side, far away from the constant volume cavity (3), of the piston (4) is sequentially connected with a piston rod (5) and a driving handle (6), and the piston (4) is pushed by the driving handle (6) to move so as to change the capacity of the constant volume cavity (3).

4. The automatic delivery system according to claim 1, wherein a first overflow port (18) higher than the liquid outlet (15) is arranged in the constant volume cavity (3) to receive liquid overflowed by the pressure increase or the capacity decrease in the constant volume cavity (3), and the liquid outlet direction of the first overflow port (18) is connected with an overflow cavity (7);

the bottom of the overflow cavity (7) is provided with a duckbill valve (8), the duckbill valve (8) circulates unidirectionally, and when the liquid is required to be replenished in the constant volume cavity (3), the liquid in the overflow cavity (7) is transferred from the overflow cavity (7) towards the constant volume cavity (3);

the bottom of the constant volume cavity (3) is arranged to be a sinking structure (22) to form the lowest point of the constant volume cavity (3), and the liquid suction port (17) and the duckbill valve (8) are arranged in the sinking structure (22).

5. The automatic delivery system according to claim 1, wherein the top of the liquid inlet (11) at the top of the liquid suction pipe (16) is provided with a conical structure to be inserted into the liquid outlet structure, the periphery of the conical structure is provided with liquid inlet through holes (12) to guide out liquid in the closed container (1), and the bottom of the conical structure is sleeved with a sealing ring (10) to be in closed connection with the inner wall of the liquid outlet structure.

6. The automated delivery system of claim 1, wherein the tapping structure comprises:

the liquid outlet through hole (107), the liquid outlet through hole (107) is arranged at the bottom of the closed container (1), and a boss (103) protruding out of the bottom of the closed container (1) is downwards formed around the periphery of the liquid outlet through hole (107);

the boss (103) is internally hollow to form a concave hole (105), the concave hole (105) is communicated with the liquid outlet through hole (107), and the top of the concave hole (105) horizontally forms an edge (108) towards the inside;

and the plugging unit is arranged in the concave hole (105) and plugs the liquid outlet through hole (107) under the action of no external pressure.

7. The automated delivery system of claim 6, wherein the occlusion unit comprises:

the hole plug (104) is plugged upwards from a bottom concave hole (105) of the boss (103) and is abutted against an edge (108) formed on one side, close to the liquid outlet through hole (107), of the boss (103);

and the first stop valve (106) is attached to the liquid outlet through hole (107).

8. The automatic delivery system according to claim 6, wherein the blocking unit employs a No. two stop valve (118), the No. two stop valve (118) being mounted in the liquid outlet through hole (107);

a valve seat (119) of the second stop valve (118) is positioned below the liquid outlet through hole (107), and is in sealing connection with the concave hole (105) through a stop valve sealing ring (117), and a valve port (116) with a downward opening is formed in the valve seat (119) and is in interference connection with the guide pipe (14);

the valve body (109) of the second stop valve (118) is arranged above the liquid outlet through hole (107), a small cover plate (110), a valve body spring (111) and a valve body plug (112) are arranged in the valve body (109) from top to bottom, and the small cover plate (110) is buckled and covered at the top of the valve body (109) through small cover plate buckles (114) arranged on the periphery of the bottom and vertical through holes (115) on the periphery of the valve body (109);

under the condition of no external force, the valve body plug (112) is clamped in the liquid outlet through hole (107) under the acting force of the valve body spring (111).

9. An automatic delivery system, comprising:

a non-closed container (100), wherein the non-closed container (100) is filled with liquid to be thrown in, the bottom of the non-closed container extends outwards to form a bottom liquid outlet (1500), and the side surface of the non-closed container is provided with an openable cover (700);

a liquid suction pipe (16) on the Venturi (2) is inserted into the constant volume cavity (3), a gap is reserved between a liquid suction port (17) at the bottom of the liquid suction pipe (16) and the bottom of the constant volume cavity (3), and a liquid outlet (1500) at the bottom is inserted into the constant volume cavity (3) to guide liquid in the non-closed container (100);

the balance air pressure pipe (800) is connected to the top of the constant volume cavity (3), the other end of the balance air pressure pipe (800) is higher than the non-closed container (100), and air pressure in the constant volume cavity (3) is balanced through the balance air pressure pipe (800);

a side of the non-closed container (100) is provided with a liquid-filled opening/closing cover (700).

10. The automatic delivery system according to claim 9, characterized in that the bottom outlet (1500) is provided in a pipette (16) of the venturi (2);

a floating ball (9) which floats up and down along with the change of the liquid height in the constant volume cavity (3) and the change of the pressure in the venturi (2) is arranged below the bottom liquid outlet (1500) in the liquid suction pipe (16), and the highest position of the floating ball (9) props against the bottom liquid outlet (1500) to block the liquid in the non-closed container (100) from additionally flowing into the constant volume cavity (3);

the inner diameter of the bottom liquid outlet (1500) is smaller than the outer diameter of the floating ball (9) and smaller than the inner diameter of the liquid suction pipe (16).

11. The automatic delivery system according to claim 9, wherein the constant volume chamber (3) is provided with a push rod structure on the side close to the user operation for adjusting the inner volume of the constant volume chamber (3);

the push rod structure comprises:

the second piston rod (500), the second piston rod (500) is horizontally arranged in a channel on one side of the constant volume cavity (3) far away from the non-closed container (100), a liquid channel (200) with two ends provided with a second overflow port (1600) and communicated with the constant volume cavity (2) is coaxially arranged in the second piston rod (500), one end of the second piston rod (500) far away from the non-closed container (100) is in sealing connection with the overflow pipe (900), and after the second piston rod (500) moves towards the constant volume cavity (3) to reduce the capacity, liquid in the constant volume cavity (3) is conveyed into the overflow pipe (900) and the non-closed container (100) through the liquid channel (200);

the elastic piston structure is arranged in one side of the liquid channel (200) close to the constant volume cavity (3), when the content of the constant volume cavity (3) is reduced, the pressure is increased, and the elastic piston structure is extruded to be filled with redundant liquid in the constant volume cavity (3);

the second piston (400) is sleeved on one end of the second piston rod (500) positioned in the constant volume cavity (3), and moves tangentially with the inner wall of the constant volume cavity (3) along with the movement of the second piston rod (500);

the second driving handle (600) is sleeved on one end, far away from the constant volume cavity (3), of the second piston rod (500), and is positioned outside the constant volume cavity (3), and the second driving handle (600) pushes the second piston rod (500) to move;

the elastic piston structure includes:

the piston cavity is arranged in one end of the liquid channel (200) positioned in the constant volume cavity (3), and through holes are formed in two sides of the piston cavity;

the piston plug (300) and the piston spring (1000) are sequentially arranged along the direction away from the non-closed container (100);

the inner diameters of the through holes in the piston cavity, which are positioned at the two sides of the piston plug (300) and the piston spring (1000), are smaller than the outer diameter of the piston plug (300).