CN212222405U

CN212222405U - Metering liquid filling device

Info

Publication number: CN212222405U
Application number: CN202020750136.5U
Authority: CN
Inventors: 刘辉; 刘勇; 杨丁辉; 马伊乐; 黄杰
Original assignee: Zhengzhou City Tyco Industrial Automation Co ltd
Current assignee: Zhengzhou City Tyco Industrial Automation Co ltd
Priority date: 2020-05-08
Filing date: 2020-05-08
Publication date: 2020-12-25
Anticipated expiration: 2030-05-08

Abstract

The utility model provides a measurement liquid filling device relates to measurement technical field. The metering liquid filling apparatus may include: liquid scale fill, filler pipe and tube head, wherein: the filling pipe is inserted into the side wall of the liquid scale hopper, the first end of the filling pipe extends into the liquid scale hopper, the second end of the filling pipe extends out of the liquid scale hopper, and the second end of the filling pipe is communicated with the liquid pump and is used for obtaining liquid from the liquid pump; this tube head sets up in the first end of this filler pipe, and towards the export of this liquid scale fill, can seted up a plurality of through-holes on this tube head for through a plurality of through-holes this liquid of annotating in this liquid scale fill, so that this liquid scale fill weigh the back to this liquid of filling, put in through the export. Use the embodiment of the utility model provides a, can improve the precision of liquid measurement, and then avoided the influence of filling liquid to the industrial production process as far as.

Description

Metering liquid filling device

Technical Field

The utility model relates to a measurement technical field particularly, relates to a measurement liquid filling device.

Background

In industrial processes, the proportion of the materials added is subject to strict requirements, in particular for liquid materials, which often require small quantities but have a great influence.

In a conventional liquid metering device, a liquid filling port of a weighing hopper is an opening at the top end, and liquid can be filled into the weighing hopper from the top end of the weighing hopper through a liquid pump, and the liquid is weighed by a weighing sensor connected with the weighing hopper and then thrown out from an outlet.

Because liquid is poured into the weighing hopper through the top end of the weighing hopper, the liquid in the weighing hopper can fluctuate or vibrate due to the fall caused by the liquid falling back to the bottom of the weighing hopper from the top end, the metering of the liquid can be inaccurate, and the industrial production process based on the liquid filling is further influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a measurement liquid filling device to the not enough among the above-mentioned prior art, can improve the measurement precision of liquid, can avoid filling liquid to the influence of industrial production process as far as possible.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

in a first aspect, an embodiment of the present invention provides a metering liquid filling device, the metering liquid filling device includes: liquid scale fill, filler pipe and tube head, wherein:

the filling pipe is inserted into the side wall of the liquid scale hopper, the first end of the filling pipe extends into the liquid scale hopper, the second end of the filling pipe extends out of the liquid scale hopper, and the second end of the filling pipe is communicated with the liquid pump and used for obtaining liquid from the liquid pump;

the tube head set up in the first end of filler pipe, and towards the export of liquid scale fill, a plurality of through-holes have been seted up on the tube head for through a plurality of through-holes to liquid is filled in the liquid scale fill, so that the liquid scale fill to the filling liquid weigh the back, throw in through the export.

Optionally, the first end of the filler pipe extends into the liquid scale through a side wall of the liquid scale near one end of the outlet.

Optionally, the angle between the fill pipe and the sidewall is within a predetermined range of angles.

Optionally, the preset angle is in the range of 25 ° to 90 °.

Optionally, the plurality of through holes are provided on a peripheral wall of the cartridge on a side facing the outlet.

Optionally, the tube head is hemispherical, and the plurality of through holes are disposed in the peripheral wall in a region other than the central region of the tube head.

Optionally, the plurality of through holes are distributed in an array.

Optionally, the metered liquid filling apparatus further comprises: and the pneumatic angle valve is arranged at the second end of the filling pipe, and the second end of the filling pipe is communicated with the liquid pump through the pneumatic angle valve.

Optionally, the metered liquid filling apparatus further comprises: a check valve disposed between the pneumatic angle valve and the liquid pump.

Optionally, the metered liquid filling apparatus further comprises: and the pneumatic butterfly valve is arranged at the outlet of the liquid weighing hopper.

The utility model has the advantages that:

the embodiment of the utility model provides a pair of measurement liquid filling device, this measurement liquid filling device can include: liquid scale fill, filler pipe and tube head, wherein: the filling pipe is inserted into the side wall of the liquid scale hopper, the first end of the filling pipe extends into the liquid scale hopper, the second end of the filling pipe extends out of the liquid scale hopper, and the second end of the filling pipe is communicated with the liquid pump and is used for obtaining liquid from the liquid pump; this tube head sets up in the first end of this filler pipe, and towards the export of this liquid scale fill, can seted up a plurality of through-holes on this tube head for through a plurality of through-holes this liquid of annotating in this liquid scale fill, so that this liquid scale fill weigh the back to this liquid of filling, put in through the export. Adopt the embodiment of the utility model provides an above-mentioned measurement liquid filling device establishes the filling pipe through inserting on the lateral wall of liquid scale fill to set up the tube head on stretching into the first end of the filling pipe of this liquid scale fill. Because the pipe head faces the outlet of the liquid weighing hopper and is provided with the through holes, in the process of filling liquid, liquid flows out of each through hole on the pipe head, so that the impact force of the liquid falling into the liquid weighing hopper can be dispersed, the fluctuation or the vibration of the liquid in the liquid weighing hopper can be reduced, the liquid metering precision is improved, and the influence of the liquid filling on the industrial production process is avoided as much as possible.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

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

fig. 2 is a schematic structural view of a connection relationship between a weighing sensor and a liquid weighing hopper according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a tube head according to an embodiment of the present invention;

fig. 4 is an enlarged schematic structural view of a pipe joint according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a connection between a pneumatic angle valve and a check valve according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a pneumatic butterfly valve at an outlet of a liquid weighing hopper according to an embodiment of the present invention.

Icon: 1-liquid weighing hopper; 2-filling pipe; 3-a tube head; 4-a liquid pump; 5-a through hole; 6-conveying pipe; 7-a scaffold; 8-a weighing sensor; 9-a hose; 10-pneumatic angle valves; 11-a check valve; 12-pneumatic butterfly valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses in following each embodiment can be applied to multiple scene, as long as relate to the liquid of carrying in the liquid pump and measure the scene of filling, all can adopt the utility model discloses the measurement liquid filling device that each embodiment mentioned below is put in after measuring liquid. For example, in a concrete mixing plant, before the materials are mixed by a mixer to form the qualified concrete, the required materials, such as cement, aggregate, water, additives, admixture and the like, need to be metered and injected according to the mixing ratio requirement of the concrete, and after the metering and injecting step is completed, the materials can be mixed by the mixer to form the qualified concrete. The proportion of water or liquid admixture (such as liquid water reducing agent) in the concrete has great influence on the property of the concrete, so that the quantity of the required liquid in the concrete needs to be strictly measured on occasions with high requirements on the quality of the concrete, such as high-speed rail construction which is vigorously developed at home and abroad at present.

The metering liquid filling device provided by the present invention can be explained by a plurality of embodiments as follows. Fig. 1 is a schematic structural diagram of a metering liquid filling apparatus provided in an embodiment of the present invention, as shown in fig. 1, the metering liquid filling apparatus may include: liquid weighing hopper 1, filler pipe 2 and tube head 3, wherein:

the filling pipe 2 is inserted on the side wall of the liquid scale hopper 1, a first end of the filling pipe 2 extends into the liquid scale hopper 1, a second end of the filling pipe 2 extends out of the liquid scale hopper 1, and a second end of the filling pipe 2 is communicated with the liquid pump 4 to obtain liquid from the liquid pump 4.

Tube head 3 sets up in the first end of filler pipe 2, and towards the export of liquid scale fill 1, has seted up a plurality of through-holes 5 on the tube head 3 for fill this liquid in to liquid scale fill 1 through a plurality of through-holes 5, so that the liquid scale fill 1 weigh the back to this liquid of filling, put in through the export.

Specifically, the liquid weighing hopper 1 may comprise a two-part structure, including: the protective structure who is located the top, this protective structure can protect the liquid in the liquid weighing hopper 1, and the structure that should be located the top can be the protective structure of arbitrary shape, like cube structure (cuboid structure or square structure) or cylinder structure, of course, also can be other shapes, the utility model discloses do not restrict this. The two-part structure of the liquid weighing hopper 1 may further comprise: a receiving structure at the bottom, which can receive the liquid to be metered, which is filled by the liquid pump 4. To facilitate the discharge of the liquid after metering from the liquid weighing hopper 1, the liquid level accommodating structure may be of a conical configuration.

The liquid weighing hopper 1 can be made of stainless steel materials, and the corrosion resistance and the attractiveness are better. Of course, the liquid weighing hopper 1 may be made of other materials, such as steel plate, etc., without being limited to the stainless steel material, and the present invention is not limited to the other materials.

In a specific application example, the filling pipe 2 may be inserted into the sidewall of the liquid scale 1 during the process of manufacturing the liquid scale 1, or the filling pipe 2 may be inserted into the sidewall of the liquid scale 1 after the liquid scale 1 is manufactured, where the stage of inserting the filling pipe 2 into the sidewall of the liquid scale 1 is not limited.

According to preset design requirements, the position of the filling pipe 2 inserted in the side wall of the liquid scale hopper 1 can be determined, wherein the position can be arranged on the side wall of a top protection structure of the liquid scale hopper 1, such as the outer wall of a cylindrical structure, or on the side wall of a bottom accommodation structure of the liquid scale hopper 1, such as the outer wall of a conical structure. The filling pipe 2 is arranged on the side wall of the bottom accommodating structure, so that the falling distance of liquid input through the filling pipe 2 in the liquid weighing hopper 1 can be reduced, the vibration or fluctuation of the liquid in the liquid weighing hopper 1 is further reduced, and the liquid metering precision is effectively ensured.

Further, the embodiment of the present invention will explain a liquid metering and filling apparatus by taking as an example the manner in which the filling pipe 2 is inserted into the side wall of the liquid weighing hopper 1. An opening is formed in a preset position of the side wall of the liquid scale hopper 1, a first end of the filling pipe 2 can extend into the liquid scale hopper 1 through the opening, and a second end of the filling pipe 2 extends out of the liquid scale hopper 1. The length of the filling pipe 2 extending out of the liquid scale hopper 1 can be adjusted according to design requirements, and after the adjustment is completed, the filling pipe 2 can be fixed on the liquid scale hopper 1 by adopting related technologies (such as welding) and the sealing performance of the opening position is ensured.

The second end of the fill pipe 2 can communicate with the liquid pump 4 through a delivery pipe 6 for taking liquid from the liquid pump 4. The filler pipe 2 and the delivery pipe 6 are generally made of stainless steel, also known as stainless acid-resistant steel, which is resistant to weakly corrosive media such as air, steam, water, and chemically aggressive media such as acids, bases, salts, etc.

The first end of the filling pipe 2 extending into the liquid weighing hopper 1 can be integrated with the pipe head 3 into a whole structure or can be a split structure and fixed together in a preset connection mode. For example, in one embodiment, the pipe stub 3 is provided with a threaded structure and the first end of the corresponding fill pipe 2 is also provided with a threaded structure, and the pipe stub 3 and the first end of the fill pipe 2 can be fixedly connected together by means of a threaded connection. Of course, the coupling of the pipe head 3 to the first end of the fill pipe 2 can also be carried out in other ways, such as welding. The utility model discloses do not prescribe a limit to this.

With tube head 3 towards the export direction of liquid scale fill 1 to, can set up a plurality of through-holes 5 on the tube head 3, the quantity of through-hole 5 can be set for according to the area of tube head 3 and the size of single through-hole of predetermineeing, can set up through-hole 5 on tube head 3 whole wall, also can set up through-hole 5 on tube head 3 predetermined area according to experience. The number of through-holes 5 provided in the cartridge 3, as well as the size of the individual through-holes, can be determined for the type of liquid to be metered. That is, in the liquid metering and filling device for different liquids, the number of the through holes 5 formed in the pipe head 3 and the size of the single through hole may be the same or different.

Because the pipe head 3 is provided with a plurality of through holes, when liquid reaches the pipe head 3 through the filling pipe 2, the liquid can be filled into the liquid weighing hopper 1 through the plurality of through holes on the pipe head 3. Because the tube head 3 is towards the export of liquid weighing hopper 1, can make liquid fall as far as possible in liquid weighing hopper 1 exit, the bottom central point department of liquid weighing hopper 1 promptly, the impact force of avoiding liquid to a great extent like this makes liquid weighing hopper 1 produce and rocks, and further messenger's weighing sensor who is connected with liquid weighing hopper 1 is more accurate to the measurement result of liquid.

In a possible example, the liquid in the liquid weighing hopper 1 is measured in a weighing manner in the present embodiment, but may be measured in other manners, such as a volumetric type and a pulse meter. As illustrated below by taking a weighing type as an example, in the process of filling liquid, the filled liquid can be measured and weighed by a weighing sensor connected with the top end of the liquid weighing hopper 1, the liquid weighing sensor can acquire weight data of the liquid in real time, and when the acquired data meet a preset value, the liquid can be thrown out through an outlet. Fig. 2 is the embodiment of the utility model provides a structural schematic diagram of weighing sensor and liquid scale fill connected relation, as shown in fig. 2, including support 7, weighing sensor 8, liquid scale fill 1 in this structural schematic diagram, wherein, the top of liquid scale fill 1 can be through being connected of a jib and weighing sensor 8's one end, and weighing sensor 8's the other end is hung on support 7 through another jib, can see out from fig. 2, and filling pipe 2 can communicate with conveyer pipe 6 through hose 9. In practical applications, the structure around the delivery pipe 6 will support it firmly, which means that the delivery pipe 6 will not have a pulling effect on the liquid weighing hopper 1. In other words, the liquid weighing hopper 1 is rather suspended and not in direct contact with other objects, so that excessive parameters can be prevented from being added to influence the finally obtained metering result. The weighing sensor can be a tension sensor, which is called a resistance strain sensor, and is a device for converting a physical signal into a measurable electric signal to be output. The control system can judge whether the weight of the liquid filled in the liquid weighing hopper 1 meets the preset requirement according to the received electric signal, and if the preset requirement is met, the control system can send various control instructions to complete subsequent operations, such as stopping the liquid pump, opening an outlet at the low end of the liquid weighing hopper 1 and the like.

For example, in a concrete mixing plant, water and an additive are two very important materials, and the additives are physically distinguished from each other and can be divided into liquid additives and powdery additives, wherein the liquid additives are widely used in the concrete production process, for example, a liquid water reducing agent is a concrete liquid additive capable of reducing the mixing water consumption under the condition of keeping the slump of concrete basically unchanged, and most of the liquid water reducing agents belong to anionic surfactants, such as lignosulfonate and naphthalenesulfonate formaldehyde polymers. Has good dispersion and homogenization functions in concrete, can reduce the stirring time of the concrete and reduce the mixing amount of concrete additives.

Generally, the liquid used in the concrete production process is firstly stored, and here, taking the water and the liquid admixture required in the concrete production as examples, a liquid storage tank can be adopted to respectively store the water and the liquid admixture, wherein the liquid storage tank storing the liquid admixture can also be called an admixture storage tank. Generally, the liquid storage tank can be made of stainless steel materials and has an anti-corrosion function. The liquid storage tank can be placed on the ground and placed in a third floor of a concrete mixing plant, wherein the ground admixture storage tank is generally cylindrical, and is usually placed in the open air, so that the top of the liquid storage tank is generally tapered to facilitate rainwater drainage, and the bottom of the liquid storage tank is generally tapered to facilitate removal of residues precipitated from liquid in the liquid storage tank.

The liquid pump 4 may be classified into a positive displacement pump, an impeller pump, a jet pump, and the like according to the operating principle, wherein the impeller pump rotates liquid at a high speed by an impeller to transmit mechanical energy to the liquid to be transported, and the liquid may be filled into the liquid scale 1 through the transport pipe 6 and the filling pipe 2. The impeller pump can be divided into a centrifugal pump, an axial flow pump, a mixed flow pump and a vortex pump according to different structural characteristics of an impeller and a flow passage of the pump. Because the liquid (such as liquid admixture) stored in the liquid storage tank has corrosiveness, the liquid pump 4 can be a chemical centrifugal pump or a stainless steel centrifugal pump generally, and other centrifugal pumps with an anti-corrosion function can be selected.

In a concrete mixing plant, two kinds of metering liquid filling devices are generally arranged, namely a metering water filling device and a metering liquid admixture filling device respectively, after a control system receives a metering instruction, the weight of water can be metered through the metering water filling device respectively, the weight of a liquid admixture can be metered through the metering liquid admixture filling device respectively, when the weight of the water and the weight of the liquid admixture meet preset conditions respectively, the liquid admixture in the metering liquid admixture filling device can be filled into the metering water filling device through a pipeline, and after the liquid admixture is fully mixed with water, the mixed liquid can be discharged through an outlet in the metering water filling device. Since the metered liquid admixture feeding means is substantially the same in construction as the metered water feeding means, the metered liquid admixture feeding means will be described herein by way of example only.

Before the control system receives a metering instruction, that is, when no liquid admixture is added, a plurality of sets of data acquired by the weighing sensors 8 can be acquired, for example, 5 sets of data are acquired, an average value of the 5 sets of data is obtained as a fixed value n, the fixed value n can be stored in a memory in advance, and the self weight of the liquid weighing hopper 1 can be solved in other ways. Since the weight of the added liquid admixture is known as p. Therefore, after the control system receives the metering instruction, the metering instruction can be sent by triggering the metering button by a worker, firstly, the control system can send the control instruction A to the liquid pump 4 to enable the liquid pump 4 to start working, the liquid admixture in the admixture liquid storage tank is filled into the liquid weighing hopper 1 through the conveying pipe 6, the filling pipe 2 and the pipe head 3, the weighing sensor 8 can acquire the weight of the liquid admixture in real time, and when the acquired data on the weighing sensor 8 is (n + p), the fact that the weight of the liquid admixture reaches the required weight is proved. At this time, the control system sends a control command B to the liquid pump 4 to stop the liquid pump 4 from delivering the liquid admixture through the delivery pipe 6, but the control system also sends a command to a worker to manually shut down the liquid pump 4 to stop the liquid pump 4. After a preset time period, the control system sends a control command C to the outlet of the liquid scale hopper 1, if the outlet of the liquid scale hopper 1 can be provided with an electromagnetic valve, the control command C opens the electromagnetic valve, and the liquid admixture can be thrown out through the opened place of the electromagnetic valve.

With the above-described metering liquid filling apparatus shown in fig. 1, the metering liquid filling apparatus may include: liquid scale fill, filler pipe and tube head, wherein: the filling pipe is inserted into the side wall of the liquid scale hopper, the first end of the filling pipe extends into the liquid scale hopper, the second end of the filling pipe extends out of the liquid scale hopper, and the second end of the filling pipe is communicated with the liquid pump and is used for obtaining liquid from the liquid pump; this tube head sets up in the first end of this filler pipe, and towards the export of this liquid scale fill, can seted up a plurality of through-holes on this tube head for through a plurality of through-holes this liquid of annotating in this liquid scale fill, so that this liquid scale fill weigh the back to this liquid of filling, put in through the export. Adopt the embodiment of the utility model provides an above-mentioned measurement liquid filling device establishes the filling pipe through inserting on the lateral wall of liquid scale fill to set up the tube head on stretching into the first end of the filling pipe of this liquid scale fill. Because the pipe head faces the outlet of the liquid weighing hopper and is provided with the through holes, in the process of filling liquid, liquid flows out of each through hole on the pipe head, so that the impact force of the liquid falling into the liquid weighing hopper can be dispersed, the fluctuation or the vibration of the liquid in the liquid weighing hopper can be reduced, the liquid metering precision is improved, and the influence of the liquid filling on the industrial production process is avoided as much as possible.

Alternatively, in the metering liquid filling apparatus as shown above, the first end of the filling pipe 2 extends into the liquid scale 1 through the side wall of the liquid scale 1 near the outlet end. In a possible example, the filler pipe 2 is angled with respect to the side wall within a predetermined angular range.

Specifically, the opening can be formed in a preset position on the side wall of the liquid scale hopper 1 close to one end of the outlet, and the side wall of the liquid scale hopper 1 close to one end of the outlet is generally a conical side wall, so that the position of the opening in the conical side wall and the specific size of the opening can be determined according to the preset angle range of the included angle between the filling pipe 2 and the conical side wall. According to practical experience, the predetermined angle range may be, for example, [25 ° -90 ° ]. The filling pipe 2 fixed in the preset angle range can further reduce the impact force of the liquid flowing out from the pipe head 3 on the liquid weighing hopper 1, and ensure the liquid metering precision to a certain extent.

The arrangement of the through holes on the pipe head and the corresponding technical effects are explained as follows with the accompanying drawings. Fig. 3 is a schematic structural view of a tube head according to an embodiment of the present invention, as shown in fig. 3, a plurality of through holes 5 are disposed on the circumferential wall of the tube head 3 facing one side of the outlet.

Specifically, tube head 3 can be hollow hemisphere, and the size can be set for according to the actual demand, can set up a plurality of through-holes 5 on tube head 3 towards the perisporium of one side of export, and this is for making the liquid drop that spills through-hole 5 on tube head 3 minimize as far as possible, and then reduces rocking of liquid weighing hopper 1 to the data that make weighing sensor gather are more accurate.

In an alternative example, if the ferrule is hemispherical, a plurality of through holes 5 may be provided in the peripheral wall of the ferrule 3 in a region other than the central region. Fig. 4 is an enlarged schematic structural view of a pipe head according to an embodiment of the present invention, and as can be seen from a top view of the pipe head 3 seen from the direction of the filling pipe 2 in fig. 4, a plurality of through holes 5 are disposed in a region outside a central region on the peripheral wall of the pipe head 3, that is, the central region on the peripheral wall of the pipe head 3 is not provided with the through holes 5, and the plurality of through holes 5 are distributed in a region outside the central region. Because the liquid that flows from filling pipe 2 can directly touch the central region of tube head 3, in order to avoid liquid from this central region outflow, reduce the impact force that liquid was filled in the liquid weighing hopper, when setting up through-hole 5 on tube head 3, can avoid the central region that corresponds with filling pipe 2 diameter on tube head 3, can effectively reduce the impact force that liquid was filled in the liquid weighing hopper, and the data that further assurance weighing sensor gathered are more accurate, guarantee to measure liquid filling device's measurement accuracy.

Optionally, in as above arbitrary shown measurement liquid filling device, a plurality of through-holes 5 that the tube head 3 set up can distribute by arbitrary mode of arranging, for example these a plurality of through-holes 5 can be array form distribution setting, also can the number of predetermined through-holes 5 distribute at will, can also be evenly distributed, again perhaps, adopt other modes to distribute, to the concrete distribution mode of through-hole 5 on tube head 3, the utility model discloses do not restrict.

It should be pointed out that if a plurality of through-holes are array distribution, can make the impact force of the liquid that flows out through a plurality of through-holes more even, further reduce the undulant or the vibrations to the liquid in this liquid weighing hopper, effectively improve the precision of liquid measurement.

On the basis of the metering liquid filling device provided in any of the above embodiments, the embodiments of the present invention may also provide a possible implementation manner of the metering liquid filling device, and other components in the metering liquid filling device are mainly described with reference to fig. 5 and 6 as follows. Fig. 5 is a schematic structural diagram of a connection between a pneumatic angle valve and a check valve provided in an embodiment of the present invention, as shown in fig. 5, the metering liquid filling device further includes: a pneumatic angle valve 10, the pneumatic angle valve 10 may be disposed at a second end of the fill pipe 2, the second end of the fill pipe 2 being in communication with the liquid pump 4 through the pneumatic angle valve 10. The pneumatic angle valve 10 can be used to control the admission of liquid into the filler pipe 2, i.e. even if the liquid pump 4 starts to operate, liquid cannot be filled into the liquid scale 1 as long as the pneumatic angle valve 10 is in the closed state. That is, when the control system receives a metering command, it first issues a command to open the pneumatic angle valve 10, and after the pneumatic angle valve 10 is opened, the control system issues a command to open the liquid pump 4 to start the liquid pump 4 to fill the liquid into the liquid weighing hopper 1 through the delivery pipe 6, the filling pipe 2 and the pipe head 3.

In a possible implementation, the pneumatic angle valve 10 is in direct communication with the liquid pump 4; in another possible implementation, the pneumatic angle valve 10 may also communicate with the liquid pump 4 through another set of control valves, for example in the implementation shown in fig. 5, the pneumatic angle valve 10 communicates with the liquid pump 4 through the check valve 11, the delivery pipe 6. The check valve 11 may communicate with the delivery pipe 6 through a hose 9.

By providing the check valve 11 between the pneumatic angle valve 10 and the liquid pump 4, the liquid in the liquid hopper 1 can be effectively prevented from flowing back through the filler pipe 2.

On the basis of the metering liquid filling device provided in any of the above embodiments, the embodiments of the present invention may also provide a possible implementation manner of the metering liquid filling device, which is described below with reference to fig. 6. Fig. 6 is a schematic structural view of a pneumatic butterfly valve at an outlet of a liquid weighing hopper provided in an embodiment of the present invention, as shown in fig. 6, the metering liquid filling device further includes: a pneumatic butterfly valve 12, the pneumatic butterfly valve 12 may be arranged at an outlet of the liquid scale hopper 1 for dosing the liquid in the liquid scale hopper 1.

When the weight data acquired by the weighing sensor 8 meet the preset liquid weight, the control system firstly sends an instruction for closing the liquid pump 4 to stop the liquid pump 4, and after the liquid pump 4 stops working for a preset time period, the control system sends an instruction for opening the pneumatic butterfly valve 12 again, and if the liquid pump 4 stops working for one minute, the pneumatic butterfly valve 12 is opened to make the liquid in the liquid weighing hopper 1 flow out through the outlet; when the data collected by the weighing sensor 8 is restored to the original data, namely the corresponding weight data when no liquid is injected into the liquid weighing hopper 1, the control system sends out an instruction for closing the pneumatic butterfly valve 12 again, so that the pneumatic butterfly valve 12 is closed.

The pneumatic butterfly valve 12 is opened and the liquid is thrown out only when the weight of the liquid in the liquid weighing hopper 1 meets the preset requirement, so that the precision of liquid metering is further ensured.

The above is only the embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A metered liquid filling apparatus, comprising: liquid scale fill, filler pipe and tube head, wherein:

2. The apparatus of claim 1, wherein the first end of the fill tube extends into the liquid scale through a sidewall of the liquid scale adjacent the outlet end.

3. The apparatus of claim 2, wherein the fill tube is angled within a predetermined angular range from the sidewall.

4. A device according to claim 3, wherein the predetermined angle is in the range 25 ° -90 °.

5. The device according to claim 1, wherein the plurality of through holes are provided on a peripheral wall of the cartridge on a side facing the outlet.

6. The device of claim 5, wherein the cartridge is hemispherical and the plurality of through holes are disposed in the peripheral wall in an area other than a central area of the cartridge.

7. The apparatus of claim 1, wherein the plurality of vias are distributed in an array.

8. The device of any one of claims 1-7, wherein the metered liquid filling device further comprises: and the pneumatic angle valve is arranged at the second end of the filling pipe, and the second end of the filling pipe is communicated with the liquid pump through the pneumatic angle valve.

9. The apparatus of claim 8, wherein said metering liquid filling apparatus further comprises: a check valve disposed between the pneumatic angle valve and the liquid pump.

10. The device of any one of claims 1-7, wherein the metered liquid filling device further comprises: and the pneumatic butterfly valve is arranged at the outlet of the liquid weighing hopper.