Micro accurate liquid adding mechanism

Abstract

The utility model relates to the field of liquid adding, in particular to a trace accurate liquid adding mechanism which comprises a material barrel, a containing cavity is formed in the material barrel, a liquid conveying assembly used for adding liquid into the containing cavity is arranged outside the material barrel, and the liquid conveying assembly comprises a diaphragm pump, a pneumatic control valve and a temporary storage filter. The pneumatic control valve is communicated with the diaphragm pump and connected with one end of the temporary storage filter through a liquid feeding pipe, the liquid feeding pipe is connected with a first electromagnetic ball valve, the temporary storage filter is connected with a rough feeding pipe and an accurate feeding pipe, the rough feeding pipe is connected with a second electromagnetic ball valve, and the accurate feeding pipe is connected with a second electromagnetic ball valve. According to the utility model, through the design that the diaphragm pump is combined with the pneumatic control valve, the first electromagnetic ball valve and the second electromagnetic ball valve, and through the control of the electric control proportional valve, a user can flexibly select coarse adjustment or fine adjustment adding according to actual requirements; therefore, rapid filling and trace and accurate liquid adding control can be carried out.

Description

Technical Field

[0001] The utility model relates to the field of liquid addition, in particular to a micro-precision liquid adding mechanism. Background Art

[0002] Liquid addition technology is widely used across multiple industrial sectors, and its importance is self-evident. In industries such as chemicals, pharmaceuticals, food, bioengineering, electroplating, spray coating, and laboratory research, precise control of liquid addition is crucial for ensuring product quality, improving production efficiency, and ensuring safety. Liquid addition mechanisms are also commonly used in gluing packaging bags to control the glue ratio, and precise addition of glue directly impacts the quality and uniformity of the adhesive layer.

[0003] Existing liquid addition mechanisms usually include components such as a liquid storage tank, a delivery pump, a metering structure (such as a flow meter), a solenoid valve, and a delivery pipeline. These mechanisms achieve precise liquid addition through a programmable control system. Its basic working process is: the liquid in the liquid storage tank is transported to the metering structure through the delivery pump for precise metering, and then the flow of the liquid is controlled by the solenoid valve, and finally the liquid is added to the target container through the delivery pipeline.

[0004] However, the existing liquid adding mechanism still has some defects in practical application. The existing addition is generally carried out according to the set value on demand, but the liquid inside the pipeline may flow by itself due to its own weight or pressure fluctuations, resulting in a deviation between the actual amount of liquid added and the set value. In addition, the addition structure of the existing liquid adding mechanism is relatively complex and not easy to be conveniently controlled, which affects the addition accuracy. The existing adding mechanism is generally not easy to conveniently add liquid according to demand and then accurately control the addition amount, which affects stable use and production efficiency. Utility Model Content

[0005] The purpose of the present invention is to solve the above defects and provide a micro-precision liquid adding mechanism to solve the technical problem that the existing adding mechanism in the above background technology is difficult to be accurately controlled, thereby affecting the stable addition and use of the liquid.

[0006] The purpose of this utility model is achieved by the following methods:

[0007] A micro-precision liquid adding mechanism includes a barrel, a holding chamber for holding liquid is formed inside the barrel, a liquid conveying component for adding liquid into the holding chamber is provided outside the barrel, the liquid conveying component includes a diaphragm pump, a pneumatic control valve arranged on the diaphragm pump and a temporary filter for liquid filtration, the diaphragm pump is provided with an input port and an output port for liquid delivery, one end of the pneumatic control valve is connected to the output port of the diaphragm pump, and the other end of the pneumatic control valve is connected to one end of the temporary filter through a liquid feed pipe, a first electromagnetic ball valve is connected to the liquid feed pipe, a rough feeding pipe and a precise feeding pipe are connected to the temporary filter, the discharge ends of the rough feeding pipe and the precise feeding pipe extend into the holding chamber, a second electromagnetic ball valve for controlling the switching of the rough feeding pipe is connected to the coarse feeding pipe, an electrically controlled proportional valve is connected to the temporary filter through an air intake pipe, and pressurization is applied to the temporary filter through the air intake pipe, thereby controlling the precise delivery of the precise feeding pipe.

[0008] Further in the above description, the input port on the diaphragm pump is connected to a liquid input tube for introducing liquid, and one end of the liquid input tube extends outward.

[0009] Specifically, the liquid input pipe is used to connect to an external liquid storage pipe, and the liquid can be introduced and discharged by driving the diaphragm pump.

[0010] Further in the above description, the first electromagnetic ball valve is installed in the middle of the liquid feed pipe, and the first electromagnetic ball valve is used to control the switch of the liquid feed pipe so that the diaphragm pump is connected to the temporary storage filter.

[0011] Specifically, the first electromagnetic ball valve can control the conduction of the liquid feed pipe, so that the liquid can be introduced into the temporary filter through the liquid feed pipe for filtration and output, further improving the accuracy and stability of liquid addition, and improving the quality of the liquid through filtration of the temporary filter.

[0012] Further in the above description, one end of the rough feeding pipe is connected to the end of the temporary filter away from the liquid feeding pipe, and one end of the precise feeding pipe is connected to the end of the temporary filter close to the liquid feeding pipe.

[0013] Further in the above description, one end of the air intake pipe is connected to one end of the temporary filter close to the coarse feed pipe, and a one-way valve is connected to the feed pipe, and the one-way valve is located between the temporary filter and the electronically controlled proportional valve.

[0014] Specifically, the air inlet pipe is connected to the external air source device, so that the air pressure is transmitted to the interior of the temporary storage filter through the one-way valve through the control of the electronically controlled proportional valve. Under the action of the air pressure, the liquid inside the temporary storage filter is introduced into the barrel through the precise feeding pipe.

[0015] Further in the above description, a support plate for mounting the barrel is provided at the bottom of the barrel, a support protrusion for supporting is formed at the bottom of the support plate, and a weighing sensor for detecting the weight of the barrel in real time is connected to the bottom of the support plate.

[0016] Specifically, the set weighing sensor is used to detect the weight of the barrel in real time, thereby controlling the addition of liquid in real time.

[0017] The beneficial effects of the present invention are as follows: through the design of a diaphragm pump combined with a pneumatic control valve, precise control of the liquid delivery process is achieved; through the setting of two delivery paths, a rough feeding pipe and a precise feeding pipe, during the initial delivery, the liquid is delivered from the rough feeding pipe and the precise feeding pipe to the accommodating chamber through the temporary filter, so that it can be initially and quickly filled; when precise control of delivery is required, the first electromagnetic ball valve controls the closing of the liquid feed pipe, and the second electromagnetic ball valve controls the closing of the rough feeding pipe, and the electric proportional valve controls the air intake pipe to pressurize the temporary filter, so that the liquid in the temporary filter is delivered to the accommodating chamber through the precise feeding pipe, so that the user can flexibly choose coarse adjustment or fine adjustment according to actual needs, thereby achieving rapid filling and micro-precise addition control of the liquid, and the triple control of the pneumatic control valve, the first electromagnetic ball valve and the second electromagnetic ball valve further improves the control accuracy and stability of the liquid, thereby improving the delivery production efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0019] Figure 2 Schematic diagram of the installation structure of the weighing sensor in this embodiment;

[0020] Figure 3 This is a diagram showing the rough feeding state in this embodiment;

[0021] Figure 4 This is a diagram showing the precise feeding operation in this embodiment;

[0022] The reference numerals in the figure are: 1-barrel, 2-holding chamber, 3-diaphragm pump, 4-pneumatic control valve, 5-temporary filter, 6-input port, 7-output port, 8-liquid feed pipe, 9-first electromagnetic ball valve, 10-rough feed pipe, 11-precise feed pipe, 12-second electromagnetic ball valve, 13-inlet pipe, 14-electrically controlled proportional valve, 15-liquid input pipe, 16-check valve, 17-support plate, 18-support protrusion, 19-weighing sensor. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementations.

[0024] In this embodiment, refer to Figures 1-4 The micro-precision liquid adding mechanism specifically implemented includes a barrel 1, a receiving chamber 2 for receiving liquid is formed inside the barrel 1, a liquid delivery component for adding liquid to the receiving chamber 2 is provided outside the barrel 1, and the liquid delivery component includes a diaphragm pump 3, a pneumatic control valve 4 provided on the diaphragm pump 3 and a temporary filter 5 for liquid filtration, the diaphragm pump 3 is provided with an input port 6 and an output port 7 for liquid delivery, one end of the pneumatic control valve 4 is connected to the output port 7 of the diaphragm pump 3, and the other end of the pneumatic control valve 4 is connected to the liquid feed pipe 8 is connected to one end of the temporary filter 5, a first electromagnetic ball valve 9 is connected to the liquid feed pipe 8, a rough feeding pipe 10 and a precise feeding pipe 11 are connected to the temporary filter 5, the discharge ends of the rough feeding pipe 10 and the precise feeding pipe 11 extend into the accommodating chamber 2, the rough feeding pipe 10 is connected to a second electromagnetic ball valve 12 for controlling the switching of the rough feeding pipe 10, and the temporary filter 5 is connected to an electric proportional valve 14 through an air inlet pipe 13, and the temporary filter 5 is pressurized through the air inlet pipe 13, so that the precise delivery of the precise feeding pipe 11 can be controlled.

[0025] The inlet port 6 on the diaphragm pump 3 is connected to a liquid inlet pipe 15 for introducing liquid. One end of the liquid inlet pipe 15 extends outward. The liquid inlet pipe 15 is used to connect to an external liquid storage pipe. The diaphragm pump 3 is driven to allow the liquid to be introduced and discharged.

[0026] A first electromagnetic ball valve 9 is mounted in the middle of the liquid feed pipe 8. The first electromagnetic ball valve 9 controls the opening and closing of the liquid feed pipe 8, thereby establishing communication between the diaphragm pump 3 and the temporary filter 5. The first electromagnetic ball valve 9 controls the conduction of the liquid feed pipe 8, thereby allowing liquid to be introduced through the liquid feed pipe 8 into the temporary filter 5 for filtration and then discharged, further improving the accuracy and stability of liquid addition and enhancing the quality of the liquid through filtration by the temporary filter 5.

[0027] One end of the coarse feed pipe is connected to the top of the temporary filter 5, and one end of the precision feed pipe 11 is connected to the bottom of the temporary filter 5. One end of the air inlet pipe 13 is connected to the top of the temporary filter 5, and a one-way valve 16 is connected to the feed pipe. The one-way valve 16 is located between the temporary filter 5 and the electronically controlled proportional valve 14.

[0028] Specifically, the air inlet pipe 13 is connected to the external air source device, so that the air pressure is transmitted to the interior of the temporary storage filter 5 through the one-way valve 16 through the control of the electronically controlled proportional valve 14. Under the squeezing action of the air pressure, the liquid inside the temporary storage filter 5 is introduced into the interior of the barrel 1 through the precise feeding pipe 11.

[0029] A support plate 17 for mounting the barrel 1 is provided at the bottom of the barrel 1. A support protrusion 18 for support is formed at the bottom of the support plate 17. The support protrusion 18 can disperse these stresses to a wider area, thereby avoiding local damage, deformation or rupture of the barrel 1 caused by stress concentration. A weighing sensor 19 for real-time detection of the weight of the barrel 1 is connected to the bottom of the support plate 17. The weighing sensor 19 is used to detect the weight of the barrel 1 in real time, thereby controlling the addition of liquid in real time.

[0030] Specifically, the pneumatic control valve 4 is a pneumatic three-way valve. The pneumatic control valve 4, the first solenoid ball valve 9 and the second solenoid ball valve 12 are electrically connected to the controller, and the pneumatic control valve 4, the first solenoid ball valve 9 and the second solenoid ball valve 12 are all normally open. When one of them fails, the other two are closed, thereby preventing subsequent faults from worsening.

[0031] In some embodiments, the liquid delivery components are provided with at least one or more groups according to the mixing requirements of the liquid, so that the operator can precisely control the amount of each liquid material added, and then precisely control the mixing, and can quickly and evenly mix various liquid raw materials or finished products to ensure product quality.

[0032] Compared with the prior art, the specific usage process in this embodiment is:

[0033] The liquid input pipe 15 of the input port 6 of the diaphragm pump 3 is connected to the external liquid storage tank, and the output port 7 of the diaphragm pump 3 is connected to the liquid feed pipe 8. Under its drive, the liquid enters the temporary filter 5 and is transported to the accommodating chamber 2 by the rough feeding pipe 10 and the precise feeding pipe 11, so that it can be initially and quickly filled. When the weighing sensor 19 detects in real time that the weight of the barrel 1 is close to the set value, the first electromagnetic ball valve 9 controls the liquid feed pipe 8 to close, and the second electromagnetic ball valve 12 controls the closing of the rough feeding pipe 10, and under the control of the electronically controlled proportional valve 14, the air source connected to the air inlet pipe 13 is transported to the temporary filter 5 through the one-way valve 16 to add liquid. The pressure is applied to the liquid temporarily stored in the temporary filter 5, so that the liquid is squeezed downward under the action of the air pressure and transported to the accommodating chamber 2 through the precise feeding pipe 11, thereby accurately controlling the addition according to the value of the weighing sensor 19, so that the user can flexibly choose coarse adjustment or fine adjustment addition according to actual needs, thereby achieving rapid addition and filling and micro-precise addition control of the liquid. The diaphragm pump 3 is combined with the design of the pneumatic control valve 4 to achieve precise control of the liquid delivery process, and the triple control of the pneumatic control valve 4, the first electromagnetic ball valve 9 and the second electromagnetic ball valve 12 is set to further improve the control accuracy and stability of the liquid, thereby improving the delivery production efficiency and quality.

[0034] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention is disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of the above-disclosed technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention, which do not depart from the content of the technical solution of the present invention, are within the scope of the technical solution of the present invention.

Claims

1. A micro-precision liquid addition mechanism, comprising a barrel, wherein a chamber for containing liquid is formed inside the barrel, and wherein: A liquid delivery component for adding liquid into the accommodating chamber is provided outside the material barrel, and the liquid delivery component includes a diaphragm pump, a pneumatic control valve provided on the diaphragm pump, and a temporary filter for liquid filtering. The diaphragm pump is provided with an input port and an output port for liquid delivery, one end of the pneumatic control valve is connected to the output port of the diaphragm pump, and the other end of the pneumatic control valve is connected to one end of the temporary filter through a liquid feed pipe, a first electromagnetic ball valve is connected to the liquid feed pipe, a rough feeding pipe and a precise feeding pipe are connected to the temporary filter, the discharge ends of the rough feeding pipe and the precise feeding pipe extend into the accommodating chamber, a second electromagnetic ball valve for controlling the switching of the rough feeding pipe is connected to the rough feeding pipe, and an electrically controlled proportional valve is connected to the temporary filter through an air inlet pipe, and pressurization is applied to the temporary filter through the air inlet pipe, thereby controlling the precise delivery of the precise feeding pipe.

2. The micro-precision liquid adding mechanism according to claim 1, characterized in that: The input port on the diaphragm pump is connected to a liquid input pipe for introducing liquid, and one end of the liquid input pipe extends outward.

3. The micro-precision liquid adding mechanism according to claim 1, characterized in that: The first electromagnetic ball valve is installed in the middle of the liquid feed pipe, and the switch of the liquid feed pipe is controlled by the first electromagnetic ball valve, so that the diaphragm pump is connected to the temporary storage filter.

4. The micro-precision liquid adding mechanism according to any one of claims 1 to 3, characterized in that: One end of the rough feeding pipe is connected to the end of the temporary filter away from the liquid feeding pipe, and one end of the precise feeding pipe is connected to the end of the temporary filter close to the liquid feeding pipe.

5. The micro-precision liquid adding mechanism according to any one of claims 1 to 3, characterized in that: One end of the air inlet pipe is connected to one end of the temporary filter close to the coarse feed pipe, and the feed pipe is connected to a one-way valve, which is located between the temporary filter and the electronically controlled proportional valve.

6. The micro-precision liquid adding mechanism according to any one of claims 1 to 3, characterized in that: A support plate for mounting the barrel is provided at the bottom of the barrel, a support protrusion for supporting is formed at the bottom of the support plate, and a weighing sensor for detecting the weight of the barrel in real time is connected to the bottom of the support plate.

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