A metering liquid filling device

Abstract

The present application provides a metering liquid filling device, which relates to the field of metering technology. The metering liquid filling device may include: a liquid weighing bucket, a filling pipe and a pipe head, wherein: the filling pipe is inserted on the side wall of the liquid weighing bucket, and the first end of the filling pipe extends into the liquid weighing bucket, the second end of the filling pipe extends out of the liquid weighing bucket, and the second end of the filling pipe is connected to the liquid pump for obtaining liquid from the liquid pump; the pipe head is arranged at the first end of the filling pipe and faces the outlet of the liquid weighing bucket, and a plurality of through holes may be opened on the pipe head for filling the liquid into the liquid weighing bucket through the plurality of through holes, so that the liquid weighing bucket weighs the filled liquid and then releases it through the outlet. By applying the embodiments of the present application, the accuracy of liquid metering can be improved, thereby avoiding the influence of the filling liquid on the industrial production process as much as possible.

Description

Technical Field

[0001] The present application relates to the field of metering technology, and in particular to a metering liquid filling device. Background Art

[0002] In the industrial production process, there are strict requirements on the proportion of materials added, especially for liquid materials, which often require small amounts but have a huge impact.

[0003] In the current liquid metering device, the liquid filling port of the weighing bucket is the opening at the top, and the liquid can be injected into the weighing bucket from the top through a liquid pump. The liquid is weighed by a weighing sensor connected to the weighing bucket and then discharged from the outlet.

[0004] Since the liquid is injected into the weighing bucket through the top of the weighing bucket, the drop caused by the liquid falling from the top to the bottom of the weighing bucket will cause the liquid in the weighing bucket to fluctuate or vibrate, resulting in inaccurate measurement of the liquid, thereby affecting the industrial production process based on liquid filling. Summary of the invention

[0005] The purpose of the present application is to provide a metering liquid filling device to address the deficiencies in the above-mentioned prior art, which can improve the metering accuracy of the liquid and avoid the influence of the filling of the liquid on the industrial production process as much as possible.

[0006] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0007] In a first aspect, an embodiment of the present application provides a metered liquid filling device, the metered liquid filling device comprising: a liquid weighing bucket, a filling pipe and a pipe head, wherein:

[0008] The filling pipe is inserted on the side wall of the liquid weighing bucket, and the first end of the filling pipe extends into the liquid weighing bucket, the second end of the filling pipe extends out of the liquid weighing bucket, and the second end of the filling pipe is connected to the liquid pump to obtain liquid from the liquid pump;

[0009] The tube head is arranged at the first end of the filling pipe and faces the outlet of the liquid weighing bucket. A plurality of through holes are opened on the tube head for filling the liquid into the liquid weighing bucket through the plurality of through holes, so that the liquid weighing bucket can weigh the filled liquid and then release it through the outlet.

[0010] Optionally, the first end of the filling pipe extends into the liquid weighing bucket through a side wall of the liquid weighing bucket close to an outlet end.

[0011] Optionally, an angle between the filling pipe and the side wall is within a preset angle range.

[0012] Optionally, the preset angle range is 25°-90°.

[0013] Optionally, the plurality of through holes are arranged on a peripheral wall of the tube head on a side facing the outlet.

[0014] Optionally, the tube head is hemispherical, and the plurality of through holes are arranged in an area outside a central area of ​​the tube head on the peripheral wall.

[0015] Optionally, the plurality of through holes are distributed in an array.

[0016] Optionally, the metered liquid filling device further comprises: a pneumatic angle valve, wherein the pneumatic angle valve is arranged at the second end of the filling pipe, and the second end of the filling pipe is connected to the liquid pump through the pneumatic angle valve.

[0017] Optionally, the metered liquid filling device further comprises: a check valve, wherein the check valve is arranged between the pneumatic angle valve and the liquid pump.

[0018] Optionally, the metered liquid filling device further comprises: a pneumatic butterfly valve, wherein the pneumatic butterfly valve is arranged at the outlet of the liquid weighing bucket.

[0019] The beneficial effects of this application are:

[0020] The embodiment of the present application provides a metering liquid filling device, which may include: a liquid weighing bucket, a filling pipe and a pipe head, wherein: the filling pipe is inserted on the side wall of the liquid weighing bucket, and the first end of the filling pipe extends into the liquid weighing bucket, the second end of the filling pipe extends out of the liquid weighing bucket, and the second end of the filling pipe is connected to the liquid pump for obtaining liquid from the liquid pump; the pipe head is arranged at the first end of the filling pipe and faces the outlet of the liquid weighing bucket, and a plurality of through holes may be opened on the pipe head for filling the liquid into the liquid weighing bucket through the plurality of through holes, so that the liquid weighing bucket weighs the filled liquid and then releases it through the outlet. The above-mentioned metering liquid filling device provided by the embodiment of the present application is adopted, by inserting a filling pipe on the side wall of the liquid weighing bucket, and setting a pipe head on the first end of the filling pipe extending into the liquid weighing bucket. Since the tube head faces the outlet of the liquid weighing bucket and a plurality of through holes are provided on the tube head, liquid will flow out of each through hole on the tube head during the process of filling the liquid, so that the impact force of the liquid falling into the liquid weighing bucket can be dispersed, thereby reducing the fluctuation or vibration of the liquid in the liquid weighing bucket, improving the accuracy of liquid metering, and thus avoiding the influence of the filling of liquid on the industrial production process as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic structural diagram of a metered liquid filling device provided in an embodiment of the present application;

[0023] Figure 2 A structural schematic diagram of the connection relationship between a weighing sensor and a liquid weighing bucket provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of a pipe head provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of an enlarged structure of a tube head provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of the structure of a pneumatic angle valve and a check valve connected to each other provided in an embodiment of the present application;

[0027] Figure 6 A schematic diagram of the structure of a pneumatic butterfly valve at the outlet of a liquid weighing bucket provided in an embodiment of the present application.

[0028] Icons: 1-liquid weighing bucket; 2-filling pipe; 3-pipe head; 4-liquid pump; 5-through hole; 6-delivery pipe; 7-bracket; 8-weighing sensor; 9-hose; 10-pneumatic angle valve; 11-check valve; 12-pneumatic butterfly valve. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] The following embodiments of the present application can be applied to a variety of scenarios. As long as it involves the metering and filling of the liquid transported in the liquid pump, the metering liquid filling device mentioned in the following embodiments of the present application can be used to meter the liquid and then put it in. For example, in a concrete mixing station, before using a mixer to mix the materials to form qualified concrete, it is necessary to meter and fill the required materials, such as cement, aggregate, water, admixtures, admixtures, etc. according to the concrete proportion requirements. After completing the metering and filling steps, it can be mixed into qualified concrete by the mixer. Among them, since the proportion of water or liquid admixture (such as liquid water reducer) in concrete has a great influence on the properties of the concrete itself, in some occasions with high requirements for concrete quality, such as the high-speed rail construction that is currently being vigorously developed at home and abroad, it is necessary to strictly measure the amount of liquid required in the concrete.

[0034] The metered liquid filling device provided by the present application can be explained through multiple embodiments as follows. Figure 1 A schematic diagram of the structure of a metered liquid filling device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the metered liquid filling device may include: a liquid weighing bucket 1, a filling pipe 2 and a pipe head 3, wherein:

[0035] The filling pipe 2 is inserted into the side wall of the liquid weighing bucket 1, and the first end of the filling pipe 2 extends into the liquid weighing bucket 1, the second end of the filling pipe 2 extends out of the liquid weighing bucket 1, and the second end of the filling pipe 2 is connected to the liquid pump 4 to obtain liquid from the liquid pump 4.

[0036] The pipe head 3 is arranged at the first end of the filling pipe 2 and faces the outlet of the liquid weighing bucket 1. A plurality of through holes 5 are opened on the pipe head 3 for filling the liquid into the liquid weighing bucket 1 through the plurality of through holes 5, so that the liquid weighing bucket 1 can weigh the filled liquid and then release it through the outlet.

[0037] Specifically, the liquid weighing bucket 1 may include a two-part structure, including: a protective structure located at the top, which can protect the liquid in the liquid weighing bucket 1. The structure located at the top can be a protective structure of any shape, such as a cubic structure (rectangular structure or cube structure) or a cylindrical structure. Of course, it can also be other shapes, and the present application does not limit this. The two-part structure of the liquid weighing bucket 1 can also include: a containing structure located at the bottom, which can contain the liquid to be measured filled by the liquid pump 4. In order to facilitate the discharge of the liquid from the liquid weighing bucket 1 after measurement, the liquid level containing structure can be a conical structure.

[0038] The liquid weighing bucket 1 can be made of stainless steel, which has better corrosion resistance and aesthetics. Of course, the liquid weighing bucket 1 can also be made of other materials, such as steel plates, etc., but not limited to the above-mentioned stainless steel materials. For other materials, this application does not limit this.

[0039] In a specific application example, the filling pipe 2 can be inserted into the side wall of the liquid weighing bucket 1 during the processing of the liquid weighing bucket 1, or the filling pipe 2 can be inserted into the side wall of the liquid weighing bucket 1 after the liquid weighing bucket 1 is processed. The stage at which the filling pipe 2 is inserted into the side wall of the liquid weighing bucket 1 is not limited here.

[0040] According to the preset design requirements, the position of the filling pipe 2 inserted on the side wall of the liquid weighing bucket 1 can be determined, wherein the position can be set on the side wall of the top protective structure of the liquid weighing bucket 1, such as the outer wall of the cylindrical structure, or can be set on the side wall of the bottom accommodating structure of the liquid weighing bucket 1, such as the outer wall of the conical structure. Setting the filling pipe 2 on the side wall of the bottom accommodating structure can reduce the falling distance of the liquid input through the filling pipe 2 in the liquid weighing bucket 1, thereby further reducing the vibration or fluctuation of the liquid in the liquid weighing bucket 1, and effectively ensuring the liquid measurement accuracy.

[0041] Furthermore, the embodiment of the present application takes the method in which the filling pipe 2 is inserted into the side wall of the liquid weighing bucket 1 as an example to illustrate the metering liquid filling device. An opening is provided at a preset position on the side wall of the liquid weighing bucket 1, through which the first end of the filling pipe 2 can be inserted into the liquid weighing bucket 1, and the second end of the filling pipe 2 can be extended out of the liquid weighing bucket 1. The length of the filling pipe 2 extending out of the liquid weighing bucket 1 can be adjusted according to design requirements. After adjustment, the filling pipe 2 can be fixed to the liquid weighing bucket 1 using relevant technologies (such as welding), and the sealing at the opening position can be ensured.

[0042] The second end of the filling pipe 2 can be connected to the liquid pump 4 through the delivery pipe 6 to obtain the liquid from the liquid pump 4. Generally, the filling pipe 2 and the delivery pipe 6 can be made of stainless steel. Usually, stainless steel can be called stainless acid-resistant steel, which can resist corrosion by weak corrosive media such as air, steam, and water, and chemically corrosive media such as acids, alkalis, and salts.

[0043] The first end of the filling pipe 2 extending into the liquid weighing bucket 1 can be an integral structure with the pipe head 3, or a split structure, and fixed together by a preset connection method. For example, in one embodiment, the pipe head 3 is configured as a threaded structure, and the corresponding first end of the filling pipe 2 is also configured as a threaded structure, and the pipe head 3 and the first end of the filling pipe 2 can be fixedly connected together by a threaded connection. Of course, the pipe head 3 and the first end of the filling pipe 2 can also be connected together by other methods, such as welding. This application does not limit this.

[0044] The tube head 3 is directed toward the outlet of the liquid weighing bucket 1, and a plurality of through holes 5 may be provided on the tube head 3. The number of through holes 5 may be set according to the area of ​​the tube head 3 and the size of a preset single through hole. The through holes 5 may be provided on the entire wall of the tube head 3, or may be provided on a preset area of ​​the tube head 3 based on experience. The number of through holes 5 provided on the tube head 3 and the size of a single through hole may be determined for the type of liquid to be measured. In other words, in the metering liquid filling device for different liquids, the number of through holes 5 provided on the tube head 3 and the size of a single through hole may be the same or different.

[0045] Since the tube head 3 is provided with a plurality of through holes, when the liquid reaches the tube head 3 through the filling pipe 2, the liquid can be filled into the liquid weighing bucket 1 through the plurality of through holes on the tube head 3. Since the tube head 3 faces the outlet of the liquid weighing bucket 1, the liquid can fall as much as possible at the outlet of the liquid weighing bucket 1, that is, at the bottom center of the liquid weighing bucket 1, which can largely avoid the impact force of the liquid causing the liquid weighing bucket 1 to shake, and further make the weighing sensor connected to the liquid weighing bucket 1 more accurate in measuring the liquid.

[0046] In a possible example, the present embodiment adopts a weighing method to measure the liquid in the liquid weighing bucket 1. Of course, other weighing methods can also be used, such as volumetric and pulse meters. The weighing method is used as an example to illustrate that during the filling process of the liquid, the filled liquid can be weighed by a weighing sensor connected to the top of the liquid weighing bucket 1. The liquid weighing sensor can collect the weight data of the liquid in real time. When the collected data meets the preset value, the liquid can be discharged through the outlet. Figure 2A structural diagram of the connection relationship between a weighing sensor and a liquid weighing bucket provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the structural diagram includes a bracket 7, a weighing sensor 8, and a liquid weighing bucket 1, wherein the top of the liquid weighing bucket 1 can be connected to one end of the weighing sensor 8 through a suspension rod, and the other end of the weighing sensor 8 is mounted on the bracket 7 through another suspension rod. Figure 2 It can be seen that the filling pipe 2 is connected to the delivery pipe 6 through the hose 9. In actual applications, the structure around the delivery pipe 6 will provide firm support for it, which is equivalent to the delivery pipe 6 not having a pulling effect on the liquid weighing bucket 1. In other words, the liquid weighing bucket 1 is equivalent to being suspended and not in direct contact with other objects, so as to avoid adding too many parameters and affecting the final measurement results. Among them, the above-mentioned weighing sensor can specifically be a tension sensor, which is also called a resistive strain sensor, which is a device that converts a physical signal into a measurable electrical signal output. The control system can determine whether the weight of the liquid filled in the liquid weighing bucket 1 meets the preset requirements based on the received electrical signal. If the preset requirements are met, the control system can send a variety of control instructions to complete subsequent operations, such as stopping the liquid pump and opening the outlet at the lower end of the liquid weighing bucket 1.

[0047] For example, in a concrete mixing plant, water and admixtures are two very important materials. Admixtures can be divided into liquid admixtures and powdered admixtures in terms of physical form. Among them, liquid admixtures are widely used in the concrete production process. For example, liquid water reducer is a liquid concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete. Most of them are anionic surfactants, such as lignin sulfonate, naphthalene sulfonate formaldehyde polymer, etc. It has a good dispersing and homogenizing effect in concrete, which can reduce the mixing time of concrete and reduce the amount of concrete admixtures.

[0048] In general, the liquid used in the concrete production process will be stored first. Here, taking the water and liquid admixtures required in concrete production as an example, liquid storage tanks can be used to store water and liquid admixtures respectively, wherein the storage tank for storing liquid admixtures can also be called an admixture storage tank. Usually, the liquid storage tank can be made of stainless steel, which has an anti-corrosion function. The liquid storage tank can be placed on the ground and on the third floor of the concrete mixing station. Among them, the shape of the ground admixture storage tank is generally cylindrical. Since it is usually placed in the open air, the top of the storage tank generally has a certain taper to facilitate the discharge of rainwater, and the bottom is generally also conical to facilitate the removal of the residue precipitated from the liquid in the liquid storage tank.

[0049] The liquid pump 4 can be divided into types such as a positive displacement pump, an impeller pump and a jet pump according to the working principle. Among them, the impeller pump relies on the impeller to drive the liquid to rotate at high speed and transmit mechanical energy to the delivered liquid. The liquid can be filled into the liquid weighing bucket 1 through the delivery pipe 6 and the filling pipe 2. According to the different structural characteristics of the impeller and the flow channel of the pump, the impeller pump can be divided into a centrifugal pump, an axial flow pump, a mixed flow pump and a vortex pump. Since the liquid (such as a liquid admixture) stored in the liquid storage tank is corrosive, the liquid pump 4 can generally select a chemical centrifugal pump or a stainless steel centrifugal pump, and of course, other centrifugal pumps with anti-corrosion functions can also be selected.

[0050] In a concrete mixing plant, there are generally two types of metering liquid filling devices, namely, a metering water filling device and a metering liquid admixture filling device. When the control system receives a metering instruction, the weight of water can be measured by the metering water filling device and the weight of liquid admixture can be measured by the metering liquid admixture filling device. When the weight of water and the weight of liquid admixture meet the preset conditions, the liquid admixture in the metering liquid admixture filling device can be added to the metering water filling device through a pipeline. When the liquid admixture and water are fully mixed, the mixed liquid can be discharged through the outlet of the metering water filling device. Since the structure of the metering liquid admixture filling device is basically the same as that of the metering water filling device, only the metering liquid admixture is taken as an example to explain the metering liquid admixture filling device.

[0051] Before the control system receives the metering instruction, that is, when no liquid admixture is added, the data collected by multiple groups of weighing sensors 8 can be obtained. For example, 5 groups of data are obtained, and the average value of these 5 groups of data is obtained as a fixed value n. The fixed value n can be pre-stored in the memory. Of course, other methods can also be used to solve the weight of the liquid weighing bucket 1 when there is no liquid admixture. Since the weight of the added liquid admixture is known to be p. So when the control system receives the metering instruction, the metering instruction can be sent by the staff triggering the metering button. First, the control system can send a control instruction A to the liquid pump 4 to start the liquid pump 4. The liquid admixture in the admixture storage tank is added to the liquid weighing bucket 1 through the delivery pipe 6, the filling pipe 2 and the pipe head 3. The weighing sensor 8 can collect the weight of the liquid admixture in real time. When the data obtained on the weighing sensor 8 is (n+p), it proves that the weight of the liquid admixture has reached the required weight. At this time, the control system will send a control instruction B to the liquid pump 4 to stop the liquid pump 4 from delivering the liquid additive through the delivery pipe 6. Of course, the control system can also send instructions to the staff, and the staff can manually shut down the liquid pump 4 to stop the liquid pump 4. After a preset time period, the control system will send a control instruction C to the outlet of the liquid weighing bucket 1. If a solenoid valve can be installed at the outlet of the liquid weighing bucket 1, the control instruction C will open the solenoid valve, and the liquid additive can be put out through the place where the solenoid valve is opened.

[0052] Using the above Figure 1 The metering liquid filling device shown may include: a liquid weighing bucket, a filling pipe and a pipe head, wherein: the filling pipe is inserted on the side wall of the liquid weighing bucket, and the first end of the filling pipe extends into the liquid weighing bucket, the second end of the filling pipe extends out of the liquid weighing bucket, and the second end of the filling pipe is connected to the liquid pump for obtaining liquid from the liquid pump; the pipe head is arranged at the first end of the filling pipe and faces the outlet of the liquid weighing bucket, and a plurality of through holes may be opened on the pipe head for filling the liquid into the liquid weighing bucket through the plurality of through holes, so that the liquid weighing bucket weighs the filled liquid and then releases it through the outlet. The above-mentioned metering liquid filling device provided in the embodiment of the present application is adopted, by inserting a filling pipe on the side wall of the liquid weighing bucket, and setting a pipe head on the first end of the filling pipe extending into the liquid weighing bucket. Since the tube head faces the outlet of the liquid weighing bucket and a plurality of through holes are provided on the tube head, liquid will flow out of each through hole on the tube head during the process of filling the liquid, so that the impact force of the liquid falling into the liquid weighing bucket can be dispersed, thereby reducing the fluctuation or vibration of the liquid in the liquid weighing bucket, improving the accuracy of liquid metering, and thus avoiding the influence of the filling of liquid on the industrial production process as much as possible.

[0053] Optionally, in the metering liquid filling device shown above, the first end of the filling pipe 2 extends into the liquid weighing bucket 1 through the side wall of the liquid weighing bucket 1 near the outlet end. In a possible example, the angle between the filling pipe 2 and the side wall is within a preset angle range.

[0054] Specifically, an opening can be made at a preset position on the side wall near the outlet end of the liquid weighing bucket 1. Since the side wall near the outlet end of the liquid weighing bucket 1 is generally a tapered side wall, the position of the opening on the tapered side wall and the specific size of the opening can be determined according to the preset angle range of the angle between the filling pipe 2 and the tapered side wall. According to practical experience, the preset angle range can be, for example, [25°-90°]. The filling pipe 2 fixed within the preset angle range can further reduce the impact force of the liquid flowing out through the pipe head 3 on the liquid weighing bucket 1, thereby ensuring the accuracy of liquid measurement to a certain extent.

[0055] The arrangement of the through holes on the pipe head and the corresponding technical effects are explained below in conjunction with the accompanying drawings. Figure 3 A schematic diagram of the structure of a pipe head provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, a plurality of through holes 5 are arranged on the peripheral wall of the pipe head 3 on the side facing the outlet.

[0056] Specifically, the tube head 3 can be a hollow hemispherical shape, and the size can be set according to actual needs. A plurality of through holes 5 can be set on the peripheral wall of the tube head 3 facing the outlet. This is to minimize the drop of liquid spilled through the through holes 5 on the tube head 3, thereby reducing the shaking of the liquid weighing bucket 1, thereby making the data collected by the weighing sensor more accurate.

[0057] In an optional example, if the tube head is hemispherical, a plurality of through holes 5 may be arranged in an area outside the central area on the peripheral wall of the tube head 3 . Figure 4 This is a schematic diagram of an enlarged structure of a tube head provided in an embodiment of the present application, such as Figure 4 In the top view of the tube head 3 seen from the direction of the filling pipe 2, it can be seen that the multiple through holes 5 are arranged in the area outside the central area on the peripheral wall of the tube head 3, that is, the central area on the peripheral wall of the tube head 3 is not provided with through holes 5, and the multiple through holes 5 are distributed in the area outside the central area. Since the liquid flowing out of the filling pipe 2 will directly hit the central area of ​​the tube head 3, in order to avoid the liquid from flowing out of the central area and reduce the impact force of the liquid being poured into the liquid weighing bucket, when the through holes 5 are arranged on the tube head 3, the central area on the tube head 3 corresponding to the diameter of the filling pipe 2 will be avoided, which can effectively reduce the impact force of the liquid being poured into the liquid weighing bucket, further ensure that the data collected by the weighing sensor is more accurate, and ensure the metering accuracy of the metering liquid filling device.

[0058] Optionally, in any of the metering liquid filling devices shown above, the multiple through holes 5 provided on the tube head 3 can be distributed in any arrangement manner, for example, the multiple through holes 5 can be distributed in an array, or a preset number of through holes 5 can be randomly distributed, or evenly distributed, or distributed in other manners. The specific distribution method of the through holes 5 on the tube head 3 is not limited by this application.

[0059] It should be pointed out that if multiple through holes are distributed in an array, the impact force of the liquid flowing out through the multiple through holes can be more uniform, further reducing the fluctuation or vibration of the liquid in the liquid weighing bucket, and effectively improving the accuracy of liquid measurement.

[0060] Based on the metered liquid filling device provided in any of the above embodiments, the present application embodiment can also provide a possible implementation method of the metered liquid filling device, as follows: Figure 5 and Figure 6 Mainly explain other components in the metering liquid filling device. Figure 5 A schematic diagram of the structure of a pneumatic angle valve and a check valve connected to each other provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the metering liquid filling device also includes: a pneumatic angle valve 10, which can be arranged at the second end of the filling pipe 2, and the second end of the filling pipe 2 is connected to the liquid pump 4 through the pneumatic angle valve 10. Among them, the pneumatic angle valve 10 can be used to control the liquid to enter the filling pipe 2, that is, even if the liquid pump 4 starts to work, as long as the pneumatic angle valve 10 is in a closed state, the liquid cannot be added to the liquid weighing bucket 1. In other words, when the control system receives the metering instruction, it first issues an instruction to open the pneumatic angle valve 10. After the pneumatic angle valve 10 is opened, the control system then issues an instruction to open the liquid pump 4, so that the liquid pump 4 starts to work and fills the liquid into the liquid weighing bucket 1 through the delivery pipe 6, the filling pipe 2 and the pipe head 3.

[0061] In a possible implementation, the pneumatic angle valve 10 is directly connected to the liquid pump 4; in another possible implementation, the pneumatic angle valve 10 can also be connected to the liquid pump 4 through other control valve groups, such as Figure 5 In the illustrated implementation, the pneumatic angle valve 10 is connected to the liquid pump 4 via the check valve 11 and the delivery pipe 6. The check valve 11 may be connected to the delivery pipe 6 via a hose 9.

[0062] By arranging a check valve 11 between the pneumatic angle valve 10 and the liquid pump 4 , the liquid in the liquid weighing bucket 1 can be effectively prevented from flowing back through the filling pipe 2 .

[0063] Based on the metered liquid filling device provided in any of the above embodiments, the present application embodiment can also provide a possible implementation method of the metered liquid filling device, as follows: Figure 6 Provide explanation. Figure 6 A schematic diagram of the structure of a pneumatic butterfly valve at the outlet of a liquid weighing bucket provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the metering liquid filling device also includes: a pneumatic butterfly valve 12, which can be arranged at the outlet of the liquid weighing bucket 1 to feed the liquid in the liquid weighing bucket 1.

[0064] When the weight data collected by the weighing sensor 8 meets the preset liquid weight, the control system will first issue an instruction to close the liquid pump 4 to stop the liquid pump 4 from working. After the liquid pump 4 stops working for a preset time period, the control system will then issue an instruction to open the pneumatic butterfly valve 12. For example, one minute after the liquid pump 4 stops working, the pneumatic butterfly valve 12 opens to allow the liquid in the liquid weighing bucket 1 to flow out through the outlet. When the data collected by the weighing sensor 8 is restored to the original data, that is, the corresponding weight data when no liquid is injected into the liquid weighing bucket 1, the control system will then issue an instruction to close the pneumatic butterfly valve 12 to close the pneumatic butterfly valve 12.

[0065] The pneumatic butterfly valve 12 will open and release the liquid only when the weight of the liquid in the liquid weighing bucket 1 meets the preset requirements, thus further ensuring the accuracy of liquid measurement.

[0066] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

[0067] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A metering liquid filling device, characterized in that: The metered liquid filling device comprises: a liquid weighing bucket, a filling pipe and a pipe head, wherein: The filling pipe is inserted on the side wall of the liquid weighing bucket, and the first end of the filling pipe extends into the liquid weighing bucket, the second end of the filling pipe extends out of the liquid weighing bucket, and the second end of the filling pipe is connected to the liquid pump to obtain liquid from the liquid pump; The pipe head is arranged at the first end of the filling pipe and faces the outlet of the liquid weighing bucket. The pipe head is provided with a plurality of through holes for filling the liquid into the liquid weighing bucket through the plurality of through holes, so that the liquid weighing bucket weighs the filled liquid and then releases the liquid through the outlet. The first end of the filling pipe extends into the liquid weighing bucket through the side wall of the liquid weighing bucket close to the outlet end; The plurality of through holes are arranged on a peripheral wall of the pipe head on a side facing the outlet; The metered liquid filling device further comprises: a solenoid valve, which is arranged at the outlet of the liquid weighing bucket.

2. The device according to claim 1, characterized in that The included angle between the filling pipe and the side wall is within a preset angle range.

3. The device according to claim 2, characterized in that The preset angle range is 25°-90°.

4. The device according to claim 1, characterized in that The tube head is hemispherical, and the plurality of through holes are arranged in an area outside a central area of ​​the tube head on the peripheral wall.

5. The device according to claim 1, characterized in that The plurality of through holes are distributed in an array.

6. The device according to any one of claims 1 to 5, characterized in that The metered liquid filling device further comprises: a pneumatic angle valve, which is arranged at the second end of the filling pipe, and the second end of the filling pipe is connected to the liquid pump through the pneumatic angle valve.

7. The device according to claim 6, characterized in that The metered liquid filling device further comprises: a check valve, which is arranged between the pneumatic angle valve and the liquid pump.

8. The device according to any one of claims 1 to 5, characterized in that The metered liquid filling device further comprises: a pneumatic butterfly valve, which is arranged at the outlet of the liquid weighing bucket.

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