CN112362128A

CN112362128A - Liquid metering device

Info

Publication number: CN112362128A
Application number: CN202011239002.8A
Authority: CN
Inventors: 陈清; 陈忱; 陈良刚
Original assignee: Hainan Lisheng Water Purification Technology Industrial Co ltd
Current assignee: Hainan Lisheng Water Purification Technology Industrial Co ltd; Hainan Litree Purifying Technology Co Ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-02-12

Abstract

The invention relates to a liquid metering device, which comprises a metering tank, a first pneumatic valve, a second pneumatic valve and a pressure sensing module, wherein the metering tank comprises a tank body, the tank body comprises a necking cavity, a collecting cavity and a slow flow cavity, the necking cavity is a long cylindrical structure with a first liquid inlet at one end, the projection on the collecting cavity is positioned in the collecting cavity, and the slow flow cavity is a funnel-shaped structure with a first liquid outlet at one end; the first pneumatic valve is a normally closed pneumatic valve, is in signal connection with the pressure sensing module and is arranged between the first liquid inlet and the liquid storage tank; the second pneumatic valve is a normally closed pneumatic valve, is in signal connection with the pressure sensing module and is arranged between the first liquid outlet and the reaction kettle; the pressure sensing module is arranged between the first liquid outlet and the second pneumatic valve, the first pneumatic valve is controlled to be switched to be closed by opening when the pressure value is detected to reach a first set value, the second pneumatic valve is controlled to be opened, automatic control of liquid metering can be achieved, the metering accuracy is high, and the liquid discharging stability is good.

Description

Liquid metering device

Technical Field

The invention relates to the technical field of liquid metering, in particular to a liquid metering device.

Background

In the water purification and chemical industry, accurate metering of liquid has become an important factor for controlling the amount of water and the accuracy of chemical reaction, and although the control modes and metering modes for filling and conveying liquid are different, there are control modes such as manual control or automatic control, metering modes such as weighing metering, pressure sensing metering and flowmeter metering, and the metering accuracy is determined by a plurality of factors such as detection equipment, environment and metering device accuracy, and the metering device accuracy is determined by the equipment itself, so the improvement of the structure of the metering device has become a main means for improving the metering accuracy.

The existing metering device mainly adopts the structural form of a metering tank, liquid materials are added through the metering tank, but the metering accuracy of a tank body solvent is low, and the phenomena of complex manufacturing and debugging of products, secondary metering and use and the like are caused by the fact that the metering tank structure of the traditional metering tank often has the conditions of low metering accuracy and low metering accuracy due to the fact that the data metered by an on-line metering mode of the metering tank is measured; in addition, the gravity center of liquid deviates due to the structure of the metering tank and the liquidity of the liquid is too low, so that the liquid metering accuracy is low, the counting accuracy of the pressure sensing device is low, and the problem that the liquid is not smooth when the liquid is discharged is solved, so that the stability of the liquid discharge is poor.

Disclosure of Invention

Therefore, it is necessary to provide a liquid metering device for solving the problems of low metering accuracy and poor liquid discharge stability of the liquid metering device.

The utility model provides a liquid metering device, includes metering tank, first pneumatic valve, second pneumatic valve and forced induction module, the metering tank is including the jar body that is used for connecting liquid storage pot and reation kettle, wherein:

the tank body comprises a necking cavity, a collecting cavity and a slow flow cavity which are sequentially connected from top to bottom, the necking cavity is of a long cylindrical structure, one end of the necking cavity is provided with a first liquid inlet, the projection of the necking cavity on the collecting cavity is located inside the collecting cavity, and the slow flow cavity is of a funnel-shaped structure, one end of the slow flow cavity is provided with a first liquid outlet;

the first pneumatic valve is a normally closed pneumatic valve, is in signal connection with the pressure sensing module, is arranged between the first liquid inlet and the liquid storage tank and is communicated with the first liquid inlet and the liquid storage tank;

the second pneumatic valve is a normally closed pneumatic valve, is in signal connection with the pressure sensing module, is arranged between the first liquid outlet and the reaction kettle, and is communicated with the first liquid outlet and the reaction kettle;

the pressure induction module is arranged between the first liquid outlet and the second pneumatic valve and is communicated with the first liquid outlet and the second pneumatic valve, when the pressure value is detected to reach a first set value, the first pneumatic valve is controlled to be switched to be closed by opening, and the second pneumatic valve is controlled to be opened.

In the liquid metering device, the first pneumatic valve and the second pneumatic valve are both normally closed pneumatic valves, the first pneumatic valve is opened, liquid flows into the tank body from the liquid storage tank to start metering operation, the pressure sensing module detects the pressure value at the first liquid outlet, when the pressure value is detected to be lower than a first set value, the first pneumatic valve is in an open state, the second pneumatic valve is in a closed state, the liquid flows into the tank body from the liquid storage tank and is stored in the tank body, when the liquid volume in the tank body reaches a peak value, the pressure sensing module detects that the pressure value at the first liquid outlet reaches the first set value, the pressure sensing module sends a closing signal to the first pneumatic valve, the first pneumatic valve is switched from the open state to the closed state, the liquid stops flowing into the tank body from the liquid storage tank, meanwhile, the pressure sensing module sends an opening signal to the second pneumatic valve, and the second pneumatic valve, liquid flows into the reaction kettle from the tank body, the first pneumatic valve and the second pneumatic valve are sequentially and circularly controlled to be opened and closed through the pressure sensing module, so that the pressure value at the first liquid outlet is maintained near a first set value, the automatic control of liquid metering is realized, the metering process is simple and convenient, the metering accuracy is high, the whole liquid gravity center can be facilitated to be downward by limiting the necking cavity to be in a long cylindrical structure, the flowing of the liquid is facilitated, the collecting cavity is arranged, the projection of the necking cavity on the collecting cavity is limited to be positioned in the collecting cavity, the large amount of collecting of the liquid can be facilitated, the flowing of the liquid can be facilitated by limiting the slow flow cavity to be in a funnel-shaped structure, therefore, the liquid can flow in the tank body conveniently by limiting the tank body to comprise the necking cavity, the collecting cavity and the slow flow cavity which are sequentially connected from top to bottom, the liquid can flow in, make liquid measurement degree of accuracy higher, on the other hand can make things convenient for the accurate pressure value of reading first liquid outlet department of forced induction module for forced induction module count precision is higher.

In one embodiment, a first exhaust port and a first breather valve are arranged on the tank body, the first exhaust port is located at one end, away from the collecting and storing cavity, of the necking cavity, and the first breather valve is arranged on the first exhaust port.

In the liquid metering device, the first exhaust port and the first breather valve are arranged on the tank body, so that air in the tank body can be timely exhausted when the tank body is fed with liquid, and the problem of unsmooth liquid circulation caused by overlarge air pressure accumulated in the tank body is solved.

In one embodiment, an overflow connector and an overflow peak unit are arranged on the tank body, the overflow connector is located at an end portion, far away from the first liquid inlet, of the necking cavity, and the overflow peak unit comprises an overflow peak pipe and a connecting hose, wherein:

the overflow peak pipe comprises an integrated overflow pipe and a peak pipe, the extending direction of the peak pipe is parallel to and fixedly connected with the necking cavity, one end of the peak pipe is provided with a second liquid inlet, the other end of the peak pipe is positioned at one side of the second liquid inlet, which is far away from the collecting cavity, the overflow pipe extends out of the pipe wall of the peak pipe, which is close to the second liquid inlet, and the maximum height of the overflow pipe is smaller than that of the peak pipe in the extending direction parallel to the peak pipe;

and two end parts of the connecting hose are respectively connected with the second liquid inlet and the overflow connector.

In above-mentioned liquid metering device, be equipped with overflow interface and overflow peak unit through the jar body to inject overflow peak pipe and include overflow pipe and the peak flood pipe of integral type, with can solve the surplus problem of liquid level through the overflow pipe, can solve simultaneously through the peak flood pipe because of the untimely liquid that leads to of overflow leaks and because of the inaccurate problem of measurement that the internal pressure of jar leads to.

In one embodiment, a second air outlet and a second breather valve are arranged on the peak flood pipe, the second air outlet is located at one end, far away from the second liquid inlet, of the peak flood pipe, and the second breather valve is arranged on the second air outlet.

In the liquid metering device, the second exhaust port and the second breather valve are arranged on the flood peak pipe, so that air in the flood peak pipe can be timely exhausted when the flood peak pipe is fed with liquid, and the problem of unsmooth liquid circulation caused by overlarge air pressure accumulated in the flood peak pipe is solved.

In one embodiment, a clamp is fixed on the outer side of the necking cavity, and the overflow flood peak pipe clamp is arranged in the clamp.

In above-mentioned liquid metering device, through setting up the clamp to can realize the fixed connection of necking down cavity and overflow flood peak pipe comparatively conveniently reliably.

In one embodiment, the liquid metering device further comprises an overflow recovery unit comprising a recovery tank and a recovery line, wherein:

the end part of the overflow pipe, which is far away from the flood peak pipe, forms the overflow port;

one end of the recovery tank is provided with a third liquid inlet;

the recovery pipeline is communicated with the third liquid inlet and the overflow port.

In above-mentioned liquid metering device, retrieve the unit through setting up the overflow, the stock solution function can be realized to the recovery jar, can retrieve overflow liquid, realizes the repeated reuse of overflow liquid, avoids liquid extravagant.

In one embodiment, a third air outlet and a third breather valve are arranged on the recovery tank, the third air outlet and the third liquid inlet are arranged at the same end of the recovery tank side by side, and the third breather valve is arranged on the third air outlet.

In the liquid metering device, the third air outlet and the third breather valve are arranged on the recovery tank, so that air in the recovery tank can be timely discharged when the liquid in the recovery tank enters the recovery tank, and the problem of unsmooth flow of overflow liquid caused by overlarge air pressure accumulated in the recovery tank is solved.

In one embodiment, the recycling tank is provided with a recycling interface and an end cover, the recycling interface is located at one end, far away from the second liquid inlet, of the recycling tank, and the end cover is detachably covered on the recycling interface.

In the liquid metering device, the recycling port and the end cover are arranged on the recycling tank, so that the recycling and timely cleaning of overflow liquid are realized conveniently.

In one of them embodiment, be equipped with first liquid level interface, second liquid level interface and liquid level observation unit on the jar body, wherein:

the first liquid level interface and the second liquid level interface are positioned at two ends of the necking cavity along the extension direction of the necking cavity, and the second liquid level interface is positioned at one side of the first liquid level interface, which is far away from the collecting cavity;

the liquid level observation unit comprises a first liquid level switch joint, a second liquid level switch joint and a transparent observation pipe, the transparent observation pipe is of a tubular structure with two open ends, the two ends of the transparent observation pipe in the extension direction are arranged, the openings are respectively communicated with the first liquid level switch joint and the second liquid level switch joint, the first liquid level switch joint is arranged on the first liquid level interface, and the second liquid level switch joint is arranged on the second liquid level interface.

Among the above-mentioned liquid metering device, through set up a liquid level interface, second liquid level interface and liquid level observation unit on the jar body to inject liquid level observation unit and include first liquid level switch joint, second liquid level switch joint and transparent observation pipe, with can comparatively conveniently observe the internal liquid level change of jar, solved the liquid level position unclear, the problem of the internal condition of metering tank is unclear during the liquid feeding.

In one embodiment, the transparent observation tube is provided with liquid level scales along the extending direction thereof, the extending direction of the transparent observation tube is parallel to the extending direction of the necking cavity, and the large scales of the liquid level scales are close to the second liquid level interface.

In above-mentioned liquid metering device, through set up the liquid level scale on the transparent observation tube that extends direction and necking down cavity parallel along its extending direction to the big scale of injecing the liquid level scale is close to second liquid level interface, with can further make things convenient for the liquid level to observe.

Drawings

FIG. 1 is a schematic structural diagram of a liquid metering device according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another liquid metering device provided in an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another liquid metering device according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of another liquid metering device provided in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another liquid metering device provided in accordance with an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another liquid metering device according to an embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the present invention provides a liquid metering device 10 for implementing precise automatic control of liquid, the liquid metering device 10 includes a metering tank 100, a first pneumatic valve 200, a second pneumatic valve 300 and a pressure sensing module 400, the metering tank 100 includes a tank 110, the tank 110 is used for connecting a liquid storage tank 20 and reaction kettles 30, the number of the reaction kettles 30 may be one, two, three, four or more, a plurality of reaction kettles 30 are connected to the tank 110 through a pipeline, and the liquid storage tank 20 is connected to the tank 110 through another pipeline, wherein:

the tank 110 comprises an integrated necking cavity 111, a collecting cavity 112 and a flow-slowing cavity 113, the necking cavity 111, the collecting cavity 112 and the flow-slowing cavity 113 are sequentially connected from top to bottom, and a support 120 is arranged on one side of the flow-slowing cavity 113 far away from the collecting cavity 112 to support the tank 110; the necking cavity 111 is a long cylindrical structure, one end of the long cylindrical structure is provided with a first liquid inlet 114, the first liquid inlet 114 is positioned on one side of the necking cavity 111, which is far away from the collecting cavity 112, in addition, the projection of the necking cavity 111 on the collecting cavity 112 is positioned inside the collecting cavity 112, during specific setting, one end of the collecting cavity 112, which is close to the necking cavity 111, can be of a horn-shaped structure, one end of the horn-shaped structure, which is close to the necking cavity 111, is of a small caliber, one end of the collecting cavity 112, which is close to the necking cavity 111, can be of a horizontal top wall, and the horizontal top wall is connected with the end part of the necking cavity; the buffering cavity 113 is a funnel-shaped structure, one end of the funnel-shaped structure close to the collecting cavity 112 is of a large caliber, one end of the funnel-shaped structure is provided with a first liquid outlet 115, and the first liquid outlet 115 is located at one end of the buffering cavity 113 far away from the collecting cavity 112.

The first pneumatic valve 200 is a normally closed pneumatic valve, the first pneumatic valve 200 is in a closed state for a long time when the metering operation is not performed, so as to avoid the misoperation, the first pneumatic valve 200 is in signal connection with the pressure sensing module 400, the pressure sensing module 400 controls the first pneumatic valve 200 to open and close, the first pneumatic valve 200 is arranged between the first liquid inlet 114 and the liquid storage tank 20, the first pneumatic valve 200 can be fixedly connected to a pipeline between the first liquid inlet 114 and the liquid storage tank 20 in a threaded connection, a buckling connection and other modes, the first pneumatic valve 200 is communicated with the first liquid inlet 114 and the liquid storage tank 20, when the first pneumatic valve 200 is closed, the fluid is blocked from flowing from the reservoir 20 to the first pneumatic valve 200, when the first pneumatic valve 200 is open, fluid from the fluid reservoir 20 passes through the first pneumatic valve 200 and into the interior of the tank 110 from the first inlet port 114.

The second pneumatic valve 300 is a normally closed pneumatic valve, the second pneumatic valve 300 is in a closed state for a long time when the metering operation is not performed, so as to avoid the erroneous operation, and the second pneumatic valve 300 is signal-connected to the pressure sensing module 400, the pressure sensing module 400 controls the second pneumatic valve 300 to open and close, the second pneumatic valve 300 is disposed between the first liquid outlet 115 and the reaction kettle 30, the second pneumatic valve 300 can be fixedly connected to a pipeline between the first liquid outlet 115 and the reaction kettle 30 by means of screw connection, snap connection, etc., and the second pneumatic valve 300 communicates the first liquid outlet 115 and the reaction kettle 30, when the second pneumatic valve 300 is closed, the liquid is blocked when reaching the second pneumatic valve 300 from the slow flow cavity 113, and cannot flow continuously, when the second pneumatic valve 300 is opened, the liquid flows out from the second inlet port 145 of the buffer chamber 113 through the second pneumatic valve 300 into the reaction vessel 30.

The pressure sensing module 400 is disposed between the first liquid outlet 115 and the second pneumatic valve 300, and the pressure sensing module 400 is communicated with the first liquid outlet 115 and the second pneumatic valve 300, and when particularly disposed, the pressure sensing module 400 can be disposed on a pipe wall between the first liquid outlet 115 and the second pneumatic valve 300; the pressure sensing module 400 is pre-stored with a first set value, the pressure sensing module 400 is used for detecting the pressure value of the first liquid outlet 115, and compare the detected pressure value with the first set value, the pressure sensing module 400 controls the first pneumatic valve 200 to open when detecting that the pressure value does not reach the first set value, the pressure sensing module 400 controls the first pneumatic valve 200 to be switched to be closed by opening when detecting that the pressure value reaches the first set value, and meanwhile, the pressure sensing module 400 controls the second pneumatic valve 300 to be opened.

In the above liquid metering device 10, the first pneumatic valve 200 and the second pneumatic valve 300 are both normally closed pneumatic valves, the first pneumatic valve 200 is opened, the liquid flows into the tank 110 from the liquid storage tank 20, the metering operation is started, the pressure sensing module 400 detects the pressure value at the first liquid outlet 115, when the pressure value is detected not to reach the first set value, the first pneumatic valve 200 is opened, the second pneumatic valve 300 is closed, the liquid flows into the tank 110 from the liquid storage tank 20 and is stored inside the tank 110, when the liquid volume inside the tank 110 reaches the peak value, the pressure sensing module 400 detects that the pressure value at the first liquid outlet 115 reaches the first set value, the pressure sensing module 400 sends a closing signal to the first pneumatic valve 200, the first pneumatic valve 200 is switched from the open state to the closed state, the liquid stops flowing into the tank 110 from the liquid storage tank 20, and simultaneously, the pressure sensing module 400 sends an opening signal to the second pneumatic valve 300, the second pneumatic valve 300 is switched from a normally closed state to an open state, liquid flows into the reaction kettle 30 from the tank 110, the pressure sensing module 400 sequentially controls the opening and closing of the first pneumatic valve 200 and the second pneumatic valve 300 in a circulating manner, so that the pressure value at the first liquid outlet 115 is maintained near a first set value, automatic control of liquid metering is realized, the metering process is simple and convenient, the metering accuracy is high, the integral downward gravity center of the liquid can be facilitated by defining the necking cavity 111 to be a long cylindrical structure, the flowing of the liquid is facilitated, the collecting cavity 112 is provided, the projection of the necking cavity 111 on the collecting cavity 112 is defined to be positioned inside the collecting cavity 112, the large amount of collecting of the liquid can be facilitated, the flow of the liquid can be facilitated by defining the throttling cavity 113 to be a funnel-shaped structure, and therefore, the tank 110 is defined to include the necking cavities 111 sequentially connected from top to bottom, and the funnel, The collection deposits cavity 112 and unhurried current cavity 113, the liquid of being convenient for on the one hand flows in jar body 110, and liquid goes out liquid smoothness and stability is higher for liquid measurement accuracy is higher, and on the other hand can make things convenient for the pressure value that the accurate reading of forced induction module 400 was located at first liquid outlet 115, makes forced induction module 400 count the precision higher.

In order to facilitate the liquid circulation in the tank 110, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, in a preferred embodiment, a first exhaust opening 116 and a first breather valve 130 are provided on the tank 110, the first exhaust opening 116 is located at an end of the necking cavity 111 away from the collecting cavity 112, and in particular, the first exhaust opening 116 and the first loading opening 114 may be located side by side at an end of the necking cavity 111 away from the collecting cavity 112; the first breather valve 130 is disposed on the first exhaust port 116, and when the first breather valve 130 is disposed specifically, the first breather valve 130 may be fixed on the first exhaust port 116 by a screw connection, a snap connection, or the like, and of course, the connection manner between the first breather valve 130 and the first exhaust port 116 is not limited thereto, and may be other forms capable of satisfying the fixed connection requirement.

In the liquid metering device 10, when the first liquid inlet 114 feeds liquid, the gas inside the tank 110 can be discharged from the first gas outlet 116 through the first breather valve 130, so as to reduce the pressure of the air stored inside the tank 110 during the liquid feeding, on one hand, ensure that the pressure difference between the tank 110 and the liquid storage tank 20 is small, reduce the difficulty in liquid feeding, and facilitate the liquid to enter the tank 110 from the first liquid inlet 114, so that the liquid inside the tank 110 flows more conveniently and smoothly, and ensure that the pressure difference between the tank 110 and the reaction kettle 30 is small, so as to ensure that the liquid flows more smoothly and stably during the liquid discharging, on the other hand, make the pressure value detected by the pressure sensing module 400 be the pressure value of the liquid, so that the pressure sensing module 400 can accurately measure the pressure value of the first liquid outlet 115, therefore, by providing the first gas outlet 116 and the first breather valve 130 on the tank 110, the air in the tank body 110 can be discharged in time when the tank body 110 is fed with the liquid, the problem of unsmooth liquid circulation caused by overlarge air pressure accumulated in the tank body 110 is solved, the metering precision of the liquid metering device 10 is improved, and the metering efficiency is improved.

In order to facilitate pressure drainage and prevent overflow, as shown in fig. 3, 4, 5 and 6, in a preferred embodiment, the tank 110 is provided with an overflow interface 117 and an overflow peak unit 140, the overflow interface 117 is located at the end of the necking cavity 111 far from the first loading port 114, in particular arrangements, the overflow port 117 is used to drain liquid when there is an excess of liquid in the tank 110, to prevent an over-infusion of liquid, to protect metering tank 100 and pressure sensing module 400, spill port 117 may be disposed at an end of necking cavity 111 proximate to first inlet port 114, which, in this case, the overflow connection 117 is directly connected to the overflow recovery unit 600, and the overflow connection 117 may be disposed at an end of the necking cavity 111 away from the first liquid inlet 114, and at this time, the overflow interface 117 is connected to the overflow peak unit 140, and the overflow peak unit 140 includes an overflow peak pipe 141 and a connection hose 142, wherein:

the overflow peak pipe 141 comprises an overflow pipe 143 and a peak pipe 144, the overflow pipe 143 and the peak pipe 144 may be of an integral structure, an extending direction of the peak pipe 144 is parallel to an extending direction of the necking cavity 111, and the peak pipe 144 and the necking cavity 111 are fixedly connected, one end of the peak pipe 144 has a second liquid inlet 145, and the other end of the peak pipe 144 is located on a side of the second liquid inlet 145 away from the collecting cavity 112, a height of the other end of the peak pipe 144 in the extending direction parallel to the peak pipe 144 is greater than, equal to, or slightly less than a height of the necking cavity 111 away from the collecting cavity 112, the overflow pipe 143 protrudes from a pipe wall of the peak pipe 144 close to the second liquid inlet 145, and a maximum height of the overflow pipe 143 in the extending direction parallel to the peak pipe 144 is less than a maximum height of the peak pipe 144;

the two end portions of the connection hose 142 are respectively connected to the second liquid inlet 145 and the overflow port 117, and when the connection hose is specifically configured, one end of the connection hose 142 may be connected to the second liquid inlet 145 through a threaded connection or a snap connection, and the other end of the connection hose 142 may be connected to the overflow port 117 through a threaded connection or a snap connection, but the connection manner of the connection hose 142 to the second liquid inlet 145 and the overflow port 117 is not limited thereto, and may be other manners capable of meeting the fixed connection requirement.

In the liquid metering device 10, a large amount of liquid is accumulated in the tank 110, and when the liquid level in the tank 110 reaches or is higher than the overflow port 117, the liquid enters the connecting hose 142 from the overflow port 117, and when the amount of the liquid entering the connecting hose 142 is not large, the liquid enters the overflow pipe 143, so as to discharge the overpressure liquid from the necking cavity 111 into the overflow pipe 143, and when the amount of the liquid entering the connecting hose 142 is large, the overflow pipe 143 does not contain the excessive liquid, and the liquid enters the peak flood pipe 144, so that on one hand, the storage of the excessive liquid is facilitated, the liquid outflow is prevented, on the other hand, the pressure in the tank 110 can be reduced, the metering tank 100 and the pressure sensing module 400 are protected, and the metering of the pressure sensing module 400 is relatively accurate, therefore, the overflow port 117 and the peak flood unit 140 are provided on the tank 110, and the overflow peak discharge pipe 141 comprises an integrated overflow pipe 143 and a peak discharge pipe 144, so that the problem of surplus liquid level can be solved through the overflow pipe 143, and the problem of liquid leakage caused by untimely overflow and inaccurate metering caused by excessive pressure in the tank 110 can be solved through the peak discharge pipe 144.

In order to facilitate the liquid to flow through the overflow peak tube 141, as shown in fig. 5 and fig. 6, specifically, the peak tube 144 is provided with a second air outlet 146 and a second breather valve 150, the second air outlet 146 is located at one end of the peak tube 144 away from the second liquid inlet 145, the second breather valve 150 is disposed on the second air outlet 146, and when specifically disposed, the second breather valve 150 may be fixed on the second air outlet 146 through a threaded connection, a snap connection, or the like, of course, the connection manner of the second breather valve 150 and the second air outlet 146 is not limited thereto, and may also be other forms capable of meeting the fixed connection requirement.

In the liquid metering device 10, when liquid enters the connection hose 142, the gas inside the connection hose 142 and the overflow peak pipe 141 can be discharged from the second gas outlet 146 through the second gas outlet valve, so that the pressure of the air accumulated inside the connection hose 142 and the overflow peak pipe 141 is reduced when liquid enters, the pressure difference between the tank 110 and the overflow peak pipe 141 is small, the difficulty in liquid entering is reduced, the liquid can conveniently enter the overflow peak pipe 141 from the overflow port 117, so that the liquid in the connecting hose 142 and the overflow peak pipe 141 can flow more conveniently and smoothly, therefore, by providing the second exhaust port 146 and the second breather valve 150 on the peak flood pipe 144, the air in the peak discharging pipe 144 can be discharged in time when the peak discharging pipe 144 is fed with the liquid, the problem of unsmooth liquid circulation caused by overlarge air pressure accumulated in the peak discharging pipe 144 is solved, and the debugging precision and the metering precision of the liquid metering device 10 are improved.

In order to facilitate the fixed connection between the peak flood pipe 144 and the neck cavity 111, as shown in fig. 5 and fig. 6, specifically, a clamp 500 is fixed on the outer side of the neck cavity 111, and the overflow peak flood pipe 141 is clamped in the clamp 500, but the fixed connection between the peak flood pipe 144 and the neck cavity 111 is not limited thereto, and may be other manners capable of meeting the requirements.

In the liquid metering device 10, by providing the clamp 500, one end of the clamp 500 is fixed to the outside of the necking cavity 111 by means of a screw, a snap, or the like, the overflow peak pipe 141 is clamped in the other end of the clamp 500, and one end of the peak pipe 144 close to the second liquid inlet 145 is located in the clamp 500, so that the necking cavity 111 and the overflow peak pipe 141 can be fixedly connected more conveniently and reliably.

In order to collect the overflow liquid, as shown in fig. 3, 4, 5 and 6, specifically, the liquid metering device 10 further includes an overflow recovery unit 600, and the overflow recovery unit 600 includes a recovery tank 610 and a recovery line 620, wherein:

the overflow pipe 143 is provided with an overflow port 147, and the overflow port 147 is positioned at the end part of the overflow pipe 143 far away from the flood peak pipe 144;

the recovery tank 610 is provided with a third liquid inlet 611, the third liquid inlet 611 is positioned at the upper end, the lower end of the third liquid inlet 611 is provided with a plurality of upright columns 630, and the upright columns 630 are used for supporting the recovery tank 610;

the recovery line 620 communicates with the third liquid inlet 611 and the overflow 147, and when the device is specifically configured, one end of the recovery line 620 is connected to the third liquid inlet 611 by a screw connection, a snap connection, or the like, and the other end of the recovery line 620 is connected to the overflow 147 by a screw connection, a snap connection, or the like, but the connection of the recovery line 620 to the third liquid inlet 611 and the overflow 147 is not limited thereto, and may be other manners that can meet the requirements.

In the liquid metering device 10, when liquid is accumulated in the tank 110 in a large amount, and the liquid level in the tank 110 reaches or is higher than the overflow port 117, the liquid enters the connecting hose 142 from the overflow port 117, enters the overflow pipe 143, enters the recovery pipeline 620 from the overflow port 147, and then enters the recovery tank 610 through the third liquid inlet 611 to discharge the overpressure liquid from the necking cavity 111 into the recovery tank 610, so that on one hand, the overflow liquid can be automatically collected, the manual recovery cost can be reduced, on the other hand, the pressure in the tank 110 can be reduced, the metering tank 100 and the pressure sensing module 400 are protected, and the metering of the pressure sensing module 400 is more accurate. Therefore, through setting up overflow recovery unit 600, the stock solution function can be realized to recovery tank 610, can retrieve overflow liquid, realizes the repeated reuse of overflow liquid, avoids liquid extravagant.

In order to facilitate the circulation of liquid in the recovery tank 610, as shown in fig. 3, 4, 5, and 6, more specifically, the recovery tank 610 is provided with a third air outlet 612 and a third breather valve 640, the third air outlet 612 and the third liquid inlet 611 are arranged at the same end of the recovery tank 610 side by side, the third breather valve 640 is arranged on the third air outlet 612, and when the third breather valve 640 is specifically arranged, the third breather valve 640 may be fixed on the third air outlet 612 by a threaded connection, a snap connection, or the like.

In the liquid metering device 10, when liquid enters the overflow pipe 143, gas inside the overflow pipe 143 and the recovery tank 610 can be discharged from the third gas outlet 612 through the third vent valve, so that air pressure accumulated inside the overflow pipe 143 and the recovery tank 610 during liquid feeding is reduced, a small pressure difference between the tank body 110 and the recovery tank 610 is ensured, difficulty in liquid feeding is reduced, the liquid can conveniently enter the recovery tank 610 from the overflow port 147, and the liquid inside the overflow pipe 143 and the recovery tank 610 flows conveniently and smoothly. Therefore, the third air outlet 612 and the third breather valve 640 are provided in the recovery tank 610, so that air inside the recovery tank 610 can be discharged in time when the recovery tank 610 is fed with liquid, the problem of poor flow of overflow liquid caused by excessive air pressure accumulated inside the recovery tank 610 is solved, and the adjustment precision and the metering precision of the liquid metering device 10 are improved.

In order to recycle the overflow liquid, more specifically, as shown in fig. 3, 4, 5 and 6, the recycling tank 610 is provided with a recycling port 613 and an end cap 650, the recycling port 613 is located at an end of the recycling tank 610 away from the second inlet port 145, and the end cap 650 detachably covers the recycling port 613.

In the liquid metering device 10, the recovery tank 610 is replaced with the existing liquid storage tank 20, the overflow end cap 650 is connected to the reuse port 613 by screwing, snapping, or the like, at one end of the line, and the first pneumatic valve 200 is connected to the other end of the line by screwing, snapping, or the like, so that the liquid in the recovery tank 610 is metered. Therefore, a reuse interface 613 and an end cap 650 are provided on the recovery tank 610 to facilitate reuse and timely cleaning of the overflow liquid.

In order to facilitate observing the liquid level change in the tank 110, as shown in fig. 2, 3 and 6, in a preferred embodiment, a first liquid level interface 118, a second liquid level interface 119 and a liquid level observing unit 160 are disposed on the tank 110, wherein:

the first liquid level interface 118 and the second liquid level interface 119 are located at two ends of the necking cavity 111 along the extending direction thereof, and the second liquid level interface 119 is located at one side of the first liquid level interface 118 away from the collecting cavity 112;

the liquid level observing unit 160 includes a first liquid level switch joint 161, a second liquid level switch joint 162 and a transparent observing tube 163, the transparent observing tube 163 is a tubular structure with two open ends, and the two open ends of the transparent observing tube 163 along the extending direction are respectively communicated with the first liquid level switch joint 161 and the second liquid level switch joint 162, the first liquid level switch joint 161 is disposed on the first liquid level interface 118, the second liquid level switch joint 162 is disposed on the second liquid level interface 119, when specifically disposed, the first liquid level switch joint 161 is fixedly disposed on the first liquid level interface 118 by means of screw connection, snap connection, etc., similarly, the second liquid level switch joint 162 is fixedly disposed on the second liquid level interface 119 by means of screw connection, snap connection, etc., the first liquid level switch joint 161 and the second liquid level switch joint 162 can both be a time liquid level switch joint, other structural forms which can meet the requirements can be adopted.

In the liquid metering device 10, a large amount of liquid is accumulated in the tank body 110, and when the liquid level in the tank body 110 reaches or is higher than the first liquid level interface 118, the liquid will enter the transparent observation tube 163 from the first liquid level interface 118 through the first liquid level switch joint 161, because the transparent observation tube 163 is communicated with the tank body 110 through the first liquid level interface 118, the first liquid level switch joint 161, the second liquid level interface 119 and the second liquid level switch joint 162, and the liquid level in the transparent observation tube is the same as the liquid level in the tank body 110 under the action of pressure, the liquid level in the transparent observation tube 163 can reflect the liquid infusion position in the tank body 110 in real time, so that an operator can conveniently and timely make accurate judgment and detection on liquid infusion. Therefore, a liquid level interface, a second liquid level interface 119 and a liquid level observation unit 160 are arranged on the tank body 110, and the liquid level observation unit 160 is limited to comprise a first liquid level switch joint 161, a second liquid level switch joint 162 and a transparent observation pipe 163, so that the liquid level change in the tank body 110 can be observed conveniently, the problems that the liquid level position is unclear and the internal condition of the metering tank 100 is unclear during liquid adding are solved, the excessive leakage of the liquid in the tank body 110 can be prevented, the adjustment of the liquid amount in the tank body 110 is facilitated, and meanwhile, the liquid adding amount and the metering precision can be adjusted conveniently aiming at the liquids with different requirements.

In order to further facilitate observing the liquid level change in the tank 110, as shown in fig. 2, 3 and 6, specifically, a liquid level scale 164 is disposed on the transparent observation tube 163 along the extending direction thereof, the extending direction of the transparent observation tube 163 is parallel to the extending direction of the necking cavity 111, and the large scale of the liquid level scale 164 is close to the second liquid level interface 119.

In the liquid metering device 10, a large amount of liquid is accumulated in the tank body 110, and when the liquid level in the tank body 110 reaches or is higher than the first liquid level interface 118, the liquid will enter the transparent observation tube 163 from the first liquid level interface 118 through the first liquid level switch joint 161, the more the liquid in the transparent observation tube 163 is, the larger the liquid level scale 164 corresponding to the liquid is, so that the higher the liquid level in the tank body 110 can be obtained, the higher the liquid level scale 164 value on the transparent observation tube 163 can reflect the liquid infusion position in the tank body 110 in real time, and an operator can conveniently and timely make accurate judgment and detection on the liquid infusion according to the liquid level scale 164 value. By arranging the liquid level scale 164 on the transparent observation tube 163 with the extending direction parallel to the necking cavity 111 along the extending direction thereof and defining the large scale of the liquid level scale 164 close to the second liquid level interface 119, the liquid level observation can be further facilitated. When specifically setting up, transparent observation pipe 163 can be the glass material, and transparent observation pipe 163 still can be for transparent plastics material, and liquid level scale 164 can set up in the inboard of transparent observation pipe 163, avoids external influence liquid level scale 164, and liquid level scale 164 can also set up in the outside of transparent observation pipe 163 to avoid liquid to cause the influence to liquid level scale 164, and in time change when can the damage of liquid level scale 164.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a liquid metering device, its characterized in that, includes metering tank, first pneumatic valve, second pneumatic valve and forced induction module, the metering tank is including the jar body that is used for connecting liquid storage pot and reation kettle, wherein:

2. The liquid metering device of claim 1, wherein the tank body is provided with a first exhaust port and a first breather valve, the first exhaust port is located at one end of the necking cavity, which is far away from the collecting cavity, and the first breather valve is arranged on the first exhaust port.

3. The liquid metering device of claim 1, wherein the tank body is provided with an overflow connector and an overflow peak unit, the overflow connector is located at an end of the necking cavity away from the first liquid inlet, the overflow peak unit comprises an overflow peak pipe and a connecting hose, wherein:

4. The liquid metering device of claim 3, wherein the peak flooding pipe is provided with a second air outlet and a second breather valve, the second air outlet is positioned at one end of the peak flooding pipe far away from the second liquid inlet, and the second breather valve is arranged on the second air outlet.

5. A liquid metering device as claimed in claim 3 wherein a collar is secured to the outside of the neck cavity, the flood peak pipe clamp being disposed within the collar.

6. The liquid metering device of claim 3, further comprising an overflow recovery unit comprising a recovery tank and a recovery line, wherein:

one end of the recovery tank is provided with a third liquid inlet;

7. The liquid metering device of claim 6, wherein a third air outlet and a third breather valve are arranged on the recovery tank, the third air outlet and the third liquid inlet are arranged at the same end of the recovery tank side by side, and the third breather valve is arranged on the third air outlet.

8. The liquid metering device of claim 6, wherein the recovery tank is provided with a recycling port and an end cap, the recycling port is located at one end of the recovery tank far away from the second liquid inlet, and the end cap is detachably covered on the recycling port.

9. The liquid metering device of claim 1, wherein the tank body is provided with a first liquid level interface, a second liquid level interface and a liquid level observation unit, wherein:

10. The liquid metering device of claim 9, wherein the transparent observation tube is provided with a liquid level scale along an extending direction thereof, the extending direction of the transparent observation tube is parallel to the extending direction of the necking cavity, and a large scale of the liquid level scale is close to the second liquid level interface.