TWM483409U - External adjustable metering apparatus - Google Patents

Description

Externally adjustable metering device

The present invention is a technical field of a metering device, in particular to a metering function using a variable volume metering tank for adjustable metering and widely used in liquid mixing systems for chemical, scientific, biotechnology, and food processing. .

At present, the commonly used measurement mode in the industry is the measurement of the overflow trough, as shown in the first figure, which is a simplified schematic diagram of the conventional overflow trough measurement. Mainly a volumetric fixed metering tank 11 is used. The metering tank 11 has an overflow pipe 12 at a fixed position of the tank wall and a discharge pipe 13 at the bottom. The overflow pipe 12 allows the injected excess liquid to flow out, and the discharge pipe 13 is responsible for discharging the metered liquid in the tank. The metering tank 11 is further provided with a raw material supply system for supplying the liquid to be metered. The raw material supply system includes a raw material tank 14, a supply pipe 15, and a pump 16, which is responsible for communicating the raw material tank 14 and the metering tank 11, and the pump 16 is responsible for transporting the liquid, and of course, the tubes are additionally installed. Valves are used to control the opening and closing timing of each tube. The overflow tank is metered in such a manner that the liquid in the material tank 14 is transported by the pump 16 into the metering tank 11, and when the sensor at the overflow tube 12 senses a liquid overflow, The pump 16 is caused to stop operating, and then the valve at the drain pipe 13 is opened, and the quantitative liquid in the metering tank 11 flows to the set mixing tank to perform accurate metering work. However, this structure, due to the fixed position of the overflow port, although accurate quantitative function, but can not be counted The amount of adjustment is very inconvenient in operation and operation. In view of this, the creator has designed and improved this externally adjustable metering device through years of experience and continuous research and improvement.

The main purpose of the present invention is to provide an adjustable metering device that uses a variable volume metering tank and an overflow method to perform a metering mode, the metering range being determined by a variable volume amount, compared to a conventional metered overflow metering method. This creation is more suitable for users who want a variety of different measurement modes, and can be applied to a wide range of applications, such as metering functions in liquid mixing systems for chemical, scientific, biotechnology, and food processing, while the range of metering liquids is It contains chemical polishing liquid, organic/inorganic chemical liquid, raw food liquid and pure water.

For the above purposes, the creation includes a metering tank, an overflow tube, a drive assembly, a supply tube, and a drain tube, the metering tank containing a fixed volume reservoir and a variable volume bellows (Bellow) Tube), the bellows tube communicates with the liquid storage tank and constitutes the entire volume of the metering tank; the overflow tube is connected to the metering tank, and when the liquid is filled with the preset volume of the metering tank, the excess liquid volume is obtained The overflow tube flows out; the driving assembly can drive the bellows tube to compress or stretch, and simultaneously change the internal volume of the metering tank when the volume of the bellows tube changes; the liquid supply tube is connected to the metering tank. Providing the liquid to be metered into the metering tank, the liquid supply pipe is provided with a control valve, and the control valve controls the opening and closing of the pipe; the drain pipe is connected to the bottom of the metering tank, and the drain pipe is additionally provided with a control valve. When the control valve is opened, the liquid in the metering tank is discharged through the drain.

The implementation of the present invention will be described in more detail below with reference to the drawings and component symbols, so that those skilled in the art can implement the present specification after studying the present specification.

11‧‧‧Measuring tank

12‧‧‧Overflow tube

13‧‧‧Drainage tube

14‧‧‧Material tank

15‧‧‧Supply line

16‧‧‧ pump

2‧‧‧ metering tank

21‧‧‧ liquid storage tank

22‧‧‧Steel tube

221‧‧‧ wall

222‧‧‧ upper end wall

3‧‧‧Overflow tube

31‧‧‧ sensor

4‧‧‧Drive components

41‧‧‧ screw

42‧‧‧ Gear Set

43‧‧‧Powerplant

5‧‧‧liquid supply pipe

51‧‧‧Control valve

6‧‧‧Draining tube

61‧‧‧Control valve

62‧‧‧ sensor

7‧‧‧cleaning liquid supply pipe

71‧‧‧Control valve

8‧‧‧The raw material supply system

81‧‧‧feed tank

82‧‧‧Infusion tube

83‧‧‧ pump

84‧‧‧Return pipe

85‧‧‧Control valve

The first picture is a schematic diagram of the structure of the conventional overflow channel measurement; the second picture is a schematic diagram of the creation structure; the third picture is a schematic diagram of the creation operation mode (1); the fourth picture is a schematic diagram of the creation operation mode (2) The fifth picture is a schematic diagram of the operation mode of the creation (3); the sixth picture is a schematic diagram of the cleaning process for the creation.

As shown in the second figure, it is a schematic diagram of the creation structure. The externally adjustable metering device of the present invention comprises a metering tank 2, an overflow tube 3, a driving assembly 4, a liquid supply tube 5, and a drain tube 6.

The metering tank 2 includes a liquid storage tank 21 having a fixed volume and a bellows 22 of variable volume. The bellows 22 is connected to the top surface of the liquid storage tank 21, and the internal spaces of the two are connected to each other to constitute the metering tank. The entire volume of the tank 2. The bellows 22 is a wrinkle-like bladder wall 221 in the middle section, by which the bladder wall 221 can be radially compressed or stretched, thereby changing the volume of the bellows 22. In addition, in the present example, the top of the bellows 22 is sealed by an upper end wall 222, which is further connected to a cleaning liquid supply pipe 7. A control valve 71 is attached to the cleaning liquid supply pipe 7, and the control valve 71 controls the opening and closing of the pipe.

The overflow pipe 3 is connected to the metering tank 2, and when the liquid fills the predetermined volume of the metering tank 2, the excess liquid amount overflows through the overflow pipe 3. Since the volume of the metering tank 2 is variable, in the embodiment, the overflow tube 3 is connected to the wall of the top of the bellows tube 22, and the tube wall is at the wall of the capsule. Position above 221 . In addition, the overflow pipe 3 is adjacent to the telescopic bladder 22 and is additionally provided with an inductor 31 for sensing whether or not liquid flows out.

The liquid supply pipe 5 communicates with the metering tank 2 to supply the liquid to be metered into the metering tank 2. The liquid supply pipe 5 is mounted with a control valve 51, and the control valve 51 controls the opening and closing of the pipe. In the present embodiment, the liquid supply pipe 5 is connected to the liquid storage tank 21. The drain pipe 6 is connected to the bottom of the metering tank 2, and the drain pipe 6 is mounted with a control valve 61. When the control valve 61 is opened, the liquid in the metering tank 2 is discharged through the drain pipe 6. In addition, a sensor 62 is further disposed at the liquid discharge pipe 6, and the sensor 62 is used to sense whether the liquid stops flowing.

The drive assembly 4 is responsible for driving the bellows 22 to produce linear compression or pulling. Such a structure has many types of applications, and only one of them is described in this embodiment. The transmission assembly 4 includes a screw 41 and a gear set 42 that is in meshing engagement with the screw. The screw 41 is screwed to the upper end wall 222 of the bellows 22 and can drive the upper end wall 222 to produce a linear displacement. The gear set 42 is for precisely controlling the rotation stroke of the screw 41, and the final adjustment is made to control the volume of the bellows 22. The adjustment mode can adopt a manual or electric mode. In this embodiment, the electric mode control is performed. Therefore, the gear set 42 is additionally provided with a power unit 43. The power unit 43 can be a servo up to which the screw 41 is precisely controlled. stroke. If it is the manual mode control, there is no such servo motor, but a linkage and a knob with a scale (not shown) are additionally provided at the gear set 42, and the knob is manually operated to perform fine adjustment control.

Then, as a description of the actual operation mode of the creation, the creation can be widely applied to the liquid metering operations of various industries, and only one of them is described, and the scope is not limited thereby. As shown in the third figure, in the present embodiment, it is mainly used for the metering operation of the chemical liquid in the semiconductor process. Therefore, the other end of the liquid supply tube 5 is connected to a raw material supply system 8, and the raw material supply system 8 includes There is a feed tank 81, an infusion tube 82, a pump 83, and a return tube 84. The supply tank 81 is a container for containing raw materials or additives. The infusion tube 82 communicates with the liquid supply tube 5, so that liquid can be transported into the metering tank 2 through the supply tank 81 through the tube. The pump 83 is mounted to the infusion tube 82. The return pipe 84 has one end connected to the infusion pipe 82 and the other end connected to the liquid supply tank 81. A control valve 85 is additionally mounted to the return pipe 84, and the control valve 85 controls the opening and closing of the return pipe 84.

As shown in the third figure, before the metering operation is performed, the control valves 51, 61, 71 are closed, and the volume inside the metering tank 2 is first adjusted. In this embodiment, the driving assembly 4 is activated to drive the bellows 22 to stretch. Since the overflow pipe 3 is connected to the outside, the volume added by the stretching process is supplemented by the outside air. In addition, in the present embodiment, the chemical liquid is metered. Before the metering, the control valve 85 is opened, and the pump 83 is actuated to circulate and return the chemical liquid to the supply tank 81 through the infusion tube 82 and the return tube 84, so that the liquid in the tank is disturbed. To carry out the mixing and stirring action.

As shown in the fourth figure, after the chemical liquid circulation mixing is completed, the control valve 85 is closed, the control valve 51 is opened, the pump 83 is actuated, and the metering filling operation is started, and the liquid is passed through the infusion tube 82 and the liquid supply tube 5. The metering tank 2 is injected into the metering tank 2, and when the sensor 31 of the overflow pipe 3 senses that a liquid has flowed out, the control valve 51 is closed to complete the metering filling operation.

As shown in the fifth figure, the control valve 61 is opened, so that the accurately metered liquid in the metering tank 2 is discharged through the liquid discharge pipe 6, and the connected pipeline can be used to make the liquid into a mixing tank, once completed. Measurement tasks. After repeating the foregoing steps, each measurement operation can be completed.

As shown in the sixth figure, after a plurality of metering or fixed time, if the cleaning operation of the metering tank 2 has to be performed, the control valve 51 is closed, and the control valve 71 is opened to allow the cleaning liquid to enter the metering tank 2, The cleaning liquid may be pure water, deionized water, etc., to remove the attachment of the bellows 22 or the inner wall of the liquid storage tank 21, and finally open the control valve 61 to allow the waste liquid to flow out through the liquid discharge tube 6. ,this When the pipe connected to the drain pipe 6 is also connected, the waste liquid flows to the waste water tank.

In summary, the present invention controls the length of the bellows 22 from the outside by the driving device 4, thereby controlling the volume inside the metering tank 2, and the overflow pipe 3 is mounted on the top wall of the metering tank 2, It can be an adjustable metering device that meets the patent application requirements.

The above disclosure is only a preferred example of the present invention, and it is of course not possible to limit the scope of the present invention. Therefore, the equivalent changes made by the scope of the patent application are still within the scope of the present invention.

2‧‧‧ metering tank

21‧‧‧ liquid storage tank

22‧‧‧Steel tube

221‧‧‧ wall

222‧‧‧ upper end wall

3‧‧‧Overflow tube

31‧‧‧ sensor

4‧‧‧Drive components

41‧‧‧ screw

42‧‧‧ Gear Set

43‧‧‧Powerplant

5‧‧‧liquid supply pipe

51‧‧‧Control valve

6‧‧‧Draining tube

61‧‧‧Control valve

62‧‧‧ sensor

7‧‧‧cleaning liquid supply pipe

71‧‧‧Control valve

Claims (7)

An externally adjustable metering device comprises: a metering tank comprising a fixed volume storage tank and a variable volume bellows tube, the bellows tube communicating with the liquid storage tank and constituting the entire volume of the metering tank; An overflow pipe is connected to the metering tank, and when the liquid fills the preset volume of the metering tank, excess liquid flows out through the overflow pipe; a driving component can drive the bellows tube for compression or stretching And simultaneously changing the internal volume of the metering tank when the volume of the bellows is changed; a liquid supply tube is connected to the metering tank to provide liquid to be metered into the metering tank, and the liquid supply tube is additionally installed with control a valve, the control valve controls opening and closing of the tube; and a drain pipe connected to the bottom of the metering tank, the drain pipe is additionally provided with a control valve, and when the control valve is opened, the liquid in the metering tank is drained The tube is discharged. The externally adjustable metering device of claim 1, wherein the top of the metering tank is further connected with a cleaning liquid supply tube, the cleaning liquid supply tube is further provided with a control valve, and the control valve controls the tube Opening and closing. The externally adjustable metering device of claim 1, wherein the bellows tube is coupled to a top surface of the reservoir. The externally adjustable metering device of claim 3, wherein the bellows tube has a wrinkle-like retractable bladder wall, the overflow tube being connected to a wall of the bellows tube, the tube wall It is located above the wall of the capsule. The externally adjustable metering device according to any one of claims 1 to 4, wherein the driving assembly comprises a screw capable of driving the telescopic bladder for linear compression or stretching, and a screw a gear set that is in meshing engagement, and a power device capable of driving the gear set to rotate. When the power unit drives the gear set to rotate, the gear set drives the screw to rotate synchronously, so that the bellows tube generates linearity. Compressed or stretched. The externally adjustable metering device according to any one of claims 1 to 4, wherein the driving assembly comprises a screw capable of driving the bellows for linear compression or stretching, and is connected to the screw A gear set that engages, when the gear set is manually rotated, the screw will rotate synchronously, causing the bellows to produce linear compression or stretching. The externally adjustable metering device of claim 1, wherein the liquid supply pipe is connected to a raw material supply system, and the liquid to be metered by the raw material supply system is sent to the metering tank.