CN105217552B - liquid material filling control device and method - Google Patents

Abstract

The invention relates to a liquid material filling control device and method. It includes a filling head (1), a feed pipe (6) and a storage tank (3); a feed valve (7) is installed in the middle of the feed pipe (6), and one end of the feed pipe (6) is connected to the filling head ( 1) connection, the other end inputs the material to be filled, and the feed valve (7) controls the flow and cut-off of the material in the feed pipe (6); between the flange (5) and the feed valve (7) position, there is a branch on the feeding pipe (6), which is connected with the material storage cylinder (3) through the threaded pipe (4); the material storage cylinder (3) includes the air cavity (A) and the material cavity (B ) two chambers, which are sealed and isolated by the piston (2), the air chamber (A) is connected with the control valve (9) through the air pipe (8), the material chamber (B) communicates with the feed pipe (6); the control valve (9) ) to introduce or cut off the atmosphere or atmosphere of industrial instruments. The invention improves the speed and precision of the filling process, simplifies the filling process and reduces material waste.

Description

Liquid material filling control device and method

technical field

The invention relates to a liquid filling equipment suitable for the fields of medicine, food, chemical industry and the like, in particular to a liquid material filling control device which can realize alternate liquid filling under pressure and self-flowing filling.

Background technique

At present, the liquid quantitative filling equipment in the field of filling and packaging generally adopts two filling methods: pressure filling and gravity filling. The so-called pressure filling, the pipeline is directly connected to the filling head, and the material is directly transported to the filling head through the feeding pump, so the filling under pressure can ensure a fast filling speed, but due to the fluctuation of the feeding pressure, especially For equipment with multiple filling heads, when a certain filling head is closed, the pressure of the pipeline will fluctuate, resulting in irregular fluctuations in the flow of other filling heads, which seriously affects the filling accuracy of the equipment. The so-called self-flow filling, the material is first conveyed into the material box through the pipeline, and then the material box is connected to the filling head through the pipeline. The filling pressure mainly depends on the density of the material and the height of the material liquid level in the material box during filling. For many For equipment with a filling head, when the filling head is closed, the pressure fluctuations generated will be fed back into the material box. Since the volume of the material box is large enough, the material level fluctuations caused by pressure fluctuations are small and negligible, so The material box acts as a suction container for pressure fluctuations, ensuring the basic stability of material pressure and flow. Therefore, self-flow filling solves the disadvantage of poor control of filling accuracy due to pressure fluctuations in pressure filling, but the filling of self-flow filling The speed is low, and the material box used is generally large in size, difficult to clean, and easy to cause material pollution.

Contents of the invention

The object of the present invention is to provide a control device that can realize alternate filling of liquid under pressure and self-flow filling. The filling speed ensures the filling accuracy.

The invention is a liquid material filling control device, which includes a filling head, a feeding pipe and a storage tank; a feeding valve is installed in the middle of the feeding pipe, one end of the feeding pipe is connected with the filling head, and the other end is input For materials that need to be filled, the feed valve controls the flow and cut-off of the material in the feed pipe; at the position between the flange and the feed valve, there is a branch on the feed pipe, which is connected to the storage tank It is connected by a threaded pipe; the storage cylinder contains two chambers, the air chamber and the material chamber, which are sealed and isolated by the piston. The air chamber is connected to the control valve through the air pipe, and the material chamber is connected to the feed pipe; atmosphere.

A liquid material filling control device as described above, wherein: the control valve includes two air holes: the first air hole and the second air hole, and these two air holes are respectively connected to the industrial instrument air or atmosphere; the control valve communicates with the first air hole through the control air pipe. The connection and truncation of the air hole and the second air hole control the communication between the air cavity and the air of the industrial instrument or the atmosphere and the airtightness of the air cavity itself.

A liquid material filling control method, wherein the liquid material filling control device according to claim 1 or 2 is used to fill the material, and comprises the following steps:

Step S1, the filling head is in the closed state, the control valve controls the connection between the air cavity and the atmosphere, the feed valve is turned on, and the pressurized material enters the material cavity through the feed valve, and pushes the piston to move in the direction of shrinking the air cavity. The cavity increases, the air cavity shrinks, the material fills the storage tank, and then the control valve controls the air cavity to seal itself;

Step S2, the filling head is opened to carry out large-flow filling, and the pressurized material flows into packaging materials such as barrels and cans;

Step S3, judging whether the filling of the large flow rate is completed, if it is completed, proceed to step S4;

Step S4, the feed valve is closed, small flow filling is carried out, the control valve controls the conduction between the air cavity and the atmosphere or the stable industrial instrument air, and the material is pushed by gravity or/and industrial instrument air pressure, from the material cavity, through the filling head , into barrels, cans and other packaging;

Step S5, judging whether the filling of the small flow rate is completed, and if so, proceed to step S6;

Step S6, when the filling process is completed, the filling head is closed.

The liquid material filling control device proposed by the present invention not only improves the speed and accuracy of the filling process, but also cancels the material box from the structure, so that the equipment operation process does not have the step of cleaning the material box, which simplifies the filling process process, reducing material waste.

Description of drawings

Fig. 1 is the structural representation of the liquid material filling control device proposed by the present invention;

Fig. 2 is a working flow chart of the liquid material filling control device proposed by the present invention.

Among them, 1. Filling head, 2. Piston, 3. Storage cylinder, 4. Threaded pipe, 5. Flange, 6. Feed pipe, 7. Feed valve, 8. Gas pipe, 9. Control valve, A , Air cavity, B, material cavity, P1, the first air hole of the control valve, P2, the second air hole of the control valve.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

At present, liquid quantitative filling equipment, in order to meet the dual requirements of filling speed and filling accuracy, mostly adopts the double-speed filling mode: firstly, high-speed filling with large flow rate is used, and the large flow rate is turned off when the filling volume reaches the required filling volume. Filling, switch to small flow filling to meet the requirements of high speed and high precision. Therefore, the idea of the present invention is: in combination with the characteristics of the above method, when the filling equipment is filling at a large flow rate, it uses pressure filling to increase the filling speed, and when filling at a small flow rate, it is converted to self-flow filling or Stable pressure filling similar to gravity filling to ensure filling accuracy.

As shown in FIG. 1 , the liquid material filling control device proposed by the present invention includes a filling head 1 , a feeding pipe 6 and a material storage cylinder 3 . A feed valve 7 is installed in the middle of the feed pipe 6, which is connected with the filling head 1 and the material storage cylinder through the flange 5, and connected with the material storage cylinder 3 through the threaded pipe 4. The on-off of the feed valve 7 can control the circulation and cut-off of the material in the feed pipe 6 . The accumulator cylinder 3 includes two chambers, an air chamber A and a material chamber B, which are sealed and isolated by the piston 2 , the air chamber A is connected with the control valve 9 through the air pipe 8 , and the material chamber B is connected with the feed pipe 6 . The control valve 9 has two air holes, P1 and P2, and these two air holes can be connected to industrial instrument air or atmosphere. The control valve 9 can control the communication between the gas chamber A and the air or atmosphere of the industrial instrument and the sealing of the gas chamber A itself by controlling the communication and blocking of the gas pipe 8 and the two air holes of P1 and P2. When filling, the material flows in the direction of the arrow as shown in Figure 1, and the filling head 1 controls whether to fill the material into the barrel, can and other packaging.

First open the feed valve to fill the storage tank. After the storage tank is filled, open the filling head for high-flow filling. When the filling volume reaches the set value of the small flow, close the feed valve and the storage tank The air hole is open to the atmosphere or the instrument air with constant positive pressure, and the small flow rate is filled until the filling is completed.

Fig. 2 is a working flow chart of the liquid material filling control device proposed by the present invention. At the beginning, filling head 1 is closed. In step S1, the control valve 9 controls the connection between the air chamber A and the atmosphere, the feed valve 7 is turned on, the pressurized material enters the feed chamber B through the feed valve 7, and pushes the piston 2 to move in the direction where the air chamber A shrinks , the material cavity B increases, the air cavity A shrinks, the material will fill the material storage cylinder 3, and then the control valve 9 controls the air cavity A to seal itself. In step S2, the filling head 1 is opened, and the pressurized material flows into barrels, cans and other packaging materials in the direction shown by the arrow in Figure 1. At this time, the filling process is pressurized filling, and the material is pushed by pressure. Fast, it can realize fast filling with large flow rate and improve the filling speed. In step S3, the control system can judge whether the filling of the large flow rate is completed according to the weight or liquid level, etc., and the filling volume of the large flow rate is generally 95%-99% of the entire filling volume. In step S4, the feed valve 7 is closed, the control valve 9 controls the conduction between the air chamber A and the atmosphere or a stable industrial instrument air, and the material is pushed by gravity or/and stable pressure, from the material chamber B, through the filling head 1 , into barrels, cans and other packaging, the material flow rate is slow, the filling process is converted from pressure filling to self-flow filling or similar to self-flow filling, in order to ensure filling accuracy. In steps S5 and S6, when the filling process is completed, the filling head is closed, and then the control flow jumps to step S1, so that the next filling can be performed.

The embodiments of the present invention have been described in detail above. The above-mentioned implementation is only the best embodiment of the present invention, but the present invention is not limited to the above-mentioned embodiments. Within the scope of knowledge of those skilled in the art, it can also be Various changes can be made without departing from the gist of the invention.

Claims (3)

1. a kind of liquid material filling control device, it is characterised in that：Including filling head (1), feed pipe (6) and accumulator (3)； It is connect among feed pipe (6) equipped with inlet valve (7), feed pipe (6) one end with filling head (1), other end input needs filling Material, circulation of inlet valve (7) control material in feed pipe (6) and is blocked；Position between flange (5) and inlet valve (7) It puts, is set on feed pipe (6) there are one branch, this branch is connect with accumulator (3) by screwed pipe (4)；Accumulator (3) includes gas Chamber (A) and material chamber (B) two chambers, they are sealed off by piston (2), and air cavity (A) is connected by tracheae (8) and control valve (9) It connects, material chamber (B) is communicated with feed pipe (6)；Industrial instrument general mood or air are either blocked in control valve (9) importing.

2. a kind of liquid material filling control device as described in claim goes 1, it is characterised in that：Control valve (9) is including two A stomata:First stomata (P1) and the second stomata (P2), the two stomatas are respectively communicated with industrial instrument general mood or air；Control Valve (9) controls air cavity by controlling the connection of two stomatas of tracheae (8) and the first stomata (P1) and the second stomata (P2) and blocking (A) it is connected with industrial instrument general mood or air and air cavity (A) itself is closed.

A kind of 3. liquid material filling control method, which is characterized in that use liquid material as described in claim 1 or 2 The filling material of filling control device, also, include the following steps：

Step S1, filling head (1) is closed, and control valve (9) control air cavity (A) and atmosphere, inlet valve (7) are led It is logical, material with pressure by inlet valve (7) into pan feeding chamber (B), and the direction movement that piston (2) is pushed to be reduced to air cavity (A), Expect that chamber (B) increases, air cavity (A) reduces, and accumulator (3) is full of by material, and then control valve (9) control air cavity (A) itself is closed；

Step S2, filling head (1) is opened, and progress big flow is filling, and material with pressure is flowed into bucket, tank；

Step S3, judge whether big flow is filling to finish, if finished, carry out step S4；

Step S4, inlet valve (7) is closed, and carries out that small flow is filling, control valve (9) control air cavity (A) and air or stabilization Industrial instrument general mood is connected, and material is pushed by gravity or/and industrial instrument general mood pressure, by material chamber (B), through filling head (1), stream Enter in bucket, tank；

Step S5, judge whether small flow is filling to finish, if finished, carry out step S6；

Step S6, after pouring process, filling head (1) is closed.