CN102522223B - Controllable filling method for vacuum filling - Google Patents

Abstract

The controllable filling method of vacuum filling, first connect the inner needle (10) of the double-layer needle with the cavity of the workpiece to be filled, and ensure that the inner needle (10) is connected to the hole in the main control room of the needle valve, without When the external control air pressure is applied, the needle valve (7) remains closed, and the inner needle (10) of the double-layer needle is connected to the cavity of the workpiece to be filled with the needle valve main control room (6), the inner needle (10) and the The workpiece cavity forms a closed cavity; the vacuum access pipe (1) is connected to the vacuum negative pressure, and the vacuum is drawn through the outer needle (12); when the required vacuum degree is reached, the filling is carried out; when the liquid material is full of the workpiece to be filled After filling the cavity, use the vacuum inlet tube (1) to connect positive pressure nitrogen gas, the nitrogen gas reaches the opening of the filling workpiece through the outer needle (12), and under the pressure of nitrogen, the liquid material in the inner needle is pressed back Liquid material storage chamber (9); the present invention can be used for the connection between the vacuum filling pipeline and the opening of the filled device.

Description

Controlled Filling Method for Vacuum Filling

technical field

The invention relates to the technical field of vacuum filling, in particular to a connection device between the microholes of the vacuum filling plane and the filling pipe used for dye-sensitized solar cells to prevent the electrolyte from being sucked into the vacuum pump, and other equipment requiring vacuum filling liquid. A device and a controllable filling method are provided for the opening of a filling device and the connection of a filling pipeline.

Background technique

In vacuum filling, preventing liquid material from being sucked into the vacuum pump is a very necessary operation control process, which can be widely used in vacuum filling of all liquids. At present, three-way valves are often used to control vacuum negative pressure and liquid material flow, and a single needle connection is used between the opening of the device to be filled and the filling pipeline. This method will bring the following adverse consequences:

(1) The liquid material remaining between the needle and the three-way valve cannot be recovered, resulting in waste of liquid material;

(2) When the filling is completed for the first time, the liquid material remaining between the needle and the three-way valve will be sucked into the vacuum pump during the second filling, and the liquid material entering the vacuum pump will corrode the vacuum pump and affect the vacuum of the vacuum pump degree and service life;

(3) If the filling liquid is highly toxic and cannot be recycled, it will pose a threat to the health of the staff.

To sum up, it is very necessary to prevent the liquid material from being sucked into the vacuum filling connection device of the vacuum pump.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a vacuum filling connection device and a controllable filling method that prevent liquid materials from being drawn into the vacuum pump, especially dye-sensitized solar cells that prevent the electrolyte from being drawn into the vacuum pump. The controllable filling method of vacuum filling solves the waste of liquid material in conventional vacuum filling, the corrosion of the vacuum pump by the liquid material pumped into the vacuum pump, the reduction of vacuum degree, the shortening of service life, and the impact of unrecovered liquid material on the vacuum pump. The health of the staff poses a threat to the filling problem.

The technical solution of the present invention is: a controllable filling method for vacuum filling, the liquid material input system is composed of a liquid material storage chamber and a needle valve, and the needle valve realizes the filling of the liquid material into the main control room by controlling the movement of the needle ;The double-layer needle connected to the cavity of the filled device is composed of inner and outer two-layer channels (inner and outer needles). The inner needle realizes liquid material filling, and the outer needle vacuumizes and introduces external pressure to recover liquid material. The outer layer is attached with a sealing ring, which isolates the inner and outer needles from the outside atmosphere. One end of the inner needle enters the opening of the workpiece to be filled, and the other end is connected to the main control room for liquid filling. The holes are connected; the working steps are as follows: First, connect the inner needle (10) of the double-layer needle with the cavity of the workpiece to be filled, and ensure that the inner needle (10) is connected to the hole of the main control room of the needle valve, and no external pressure is applied. When the air pressure is controlled, the needle valve (7) remains closed, and the inner needle (10) of the double-layer needle connects the cavity of the workpiece to be filled with the main control room of the needle valve (6), the inner needle (10) and the workpiece to be filled The cavity forms a closed cavity; the vacuum access tube (1) is connected to the vacuum negative pressure, and the vacuum is pumped through the outer needle (12); when the required vacuum degree is reached, the vacuum access tube (1) is closed, and the external control The control needle (4) of the air pressure control needle valve opens the needle valve (7), and the liquid material enters the main control room (6) from the liquid material storage room (9) through the loosened pipeline of the needle valve control needle, and is Under the action of pressure, enter the cavity of the workpiece to be filled through the inner needle (10) for filling; when the liquid material is full of the cavity of the workpiece to be filled, use the vacuum connection tube (1) to connect to the positive pressure Nitrogen, the nitrogen reaches the opening of the filling workpiece through the outer needle (12), and under the pressure of nitrogen, the liquid material in the inner needle is pressed back to the liquid material storage chamber (9); the external control air pressure is disconnected, and the needle valve (7) Close, the liquid material storage room (9) is disconnected from the main control room and the filling workpiece, and the filling is completed; the control needle (4) is used as the switch needle of the needle valve to control the liquid material entering the main control room; the outer needle head (12) has two functions, one is to evacuate, and the other is to introduce external air pressure to recover the liquid material; the external air pressure control chamber (3) is a cavity composed of a piston and a fixed cylinder wall, and the external control chamber Pneumatic connection, through the application of external control air pressure, the spring piston is compressed, and the control needle is driven to connect the liquid material storage room with the main control room; one end of the vacuum access tube (1) is connected with the outer needle (12), and the other end It is connected with vacuum negative pressure when it is in vacuum, and it is connected with nitrogen gas when it is recovering liquid material; the spring piston (2) is composed of a spring and a piston. In order to reduce the resistance of the piston movement, lubricating oil is used between the piston and the cylinder wall .

The vacuum inlet pipe (1) can be used not only as the inlet of vacuum negative pressure but also as the inlet of external gas (nitrogen), and has the function of closing.

Control needles (4) of different diameters can be used to control the liquid material entering the main control chamber (6).

Controllable filling device for vacuum filling: a vacuum filling connection device that prevents liquid material from being drawn into the vacuum pump, including vacuum and external air pressure access pipes, external air pressure control system, main control room, liquid material input system, and standby The double-layer needle connected to the cavity of the filling workpiece; one end of the vacuum and external air pressure access tube is connected to the vacuum (negative pressure) and external air pressure, and the other end is connected to the outer needle of the double-layer needle to vacuumize the cavity of the workpiece to be filled and the subsequent external gas to recover the liquid in the needle; the external air pressure control system consists of a piston with a spring, an external air pressure control chamber, a needle valve and a control needle. The opening of the control needle of the valve makes the liquid material input system communicate with or close the main control room of the needle valve; The material input system is connected; the double-layer needle connected to the cavity of the device to be filled is composed of inner and outer two-layer channels (inner and outer needles). The inner needle realizes liquid material filling, and the outer needle vacuumizes and introduces external air pressure recovery liquid. material, the outer layer of the outer needle is attached with a sealing ring, and the sealing ring isolates the inner and outer needles from the outside atmosphere. One end of the inner needle enters the opening of the workpiece to be filled, and the other end is connected to the main control room for liquid material filling. The inner and outer needles are connected at the opening of the workpiece to be filled; The system realizes the control of the filling; the needle valve realizes the filling of the liquid material in the main control room by controlling the movement of the needle.

When in use, no external control air pressure is applied, the control needle disconnects the inner needle from the liquid material, and the vacuum is drawn through the outer needle. After the vacuum degree reaches the requirement, the vacuum connection tube is closed; the external control air pressure is applied, the spring piston is compressed, and the control The needle connects the liquid material in the liquid material storage chamber with the inner needle head to realize the liquid material filling of the workpiece; after the liquid material is completely filled, the vacuum connection tube is connected to the external pressure, and the liquid material in the inner needle head is pressed back into the liquid material The storage room is used to recover the liquid material; the external control air pressure is disconnected, and the control needle disconnects the inner needle from the liquid material storage room, and the filling is completed.

The beneficial effects of the present invention are: compared with the prior art, it has the following advantages,

(1) The present invention utilizes double-layer needles to separate the air path and the liquid path, and controls the on-off of the vacuuming air path and the filling liquid path by applying air pressure, thereby realizing separate control in time.

(2) The outer needle can introduce external pressure to recover the liquid material through the inner needle, avoiding the liquid material being sucked into the vacuum pump during the second filling, and reducing the waste of liquid material.

(3) Since the liquid material will not enter the vacuum pump, the influence of the liquid material pumped into the vacuum pump on the vacuum degree of the vacuum pump and the shortened life of the vacuum pump is avoided.

(4) Through the external air pressure control system, the filling can be stopped at any time, and the vacuum can be kept on the upper part of the filling container after partially filling the liquid material.

(5) The device of the present invention is simple, easy to operate, low in equipment manufacturing cost, long in normal operation time of the device, relatively stable in system, and suitable for filling of small, medium and large equipment.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the vacuum filling connection device for preventing liquid material from being sucked into the vacuum pump according to the present invention.

Figure 2a shows the state of preparation and vacuum before filling.

Figure 2b shows the state of filling liquid material.

The liquid material shown in Figure 2c is pressed back to the state of the liquid material storage chamber, and the filling is completed.

In the figure: 1-vacuum access pipe, 2-spring piston, 3-applied air pressure control chamber, 4-control needle, 5-applied control air pressure access pipe, 6-main control chamber, 7-needle valve, 8- Filled liquid material interface, 9-liquid material storage room, 10-inner needle, 11-controller shell, 12-outer needle, 13-sealing ring.

Detailed ways

In order to better understand the present invention, the present invention will be further described below in conjunction with accompanying drawings 1 and 2 .

As shown in Figure 1, the vacuum filling connection device for preventing liquid material from being sucked into the vacuum pump of the present invention includes a vacuum access pipe (1), a spring piston (2), an external air pressure control chamber (3), and a control needle (4) , additional control air pressure access pipe (5), main control room (6), needle valve (7), liquid material interface to be filled (8), liquid material storage room (9), inner needle (10), control Device housing (11), outer needle (12), sealing ring (13).

One end of the external air pressure control chamber (3) is a retainer wall and the other end is a spring piston (2), and there is an opening connected to the external control air pressure access pipe (5), the air pressure control chamber (3) is controlled by the needle (4) Pass through, and the air pressure control chamber (3) has a hole to connect with the external control air pressure access pipe (5);

One end of the control needle (4) is connected to the spring piston (2) and the other end is connected to the needle valve (7), and passes through the air pressure control chamber (3) and the main control chamber (6);

The main control chamber (6) is passed through by the control needle (4), and the two ends of the passed control needle (4) are sealed with the main control chamber (3) and the liquid material storage chamber (9), and the main control chamber (6 ) has a hole connected with the inner needle (10);

One end of the liquid material storage chamber (9) is connected to the needle valve (7) and the other end is connected to the liquid material interface (8) to be filled;

One end of the inner needle (10) is connected with the main control room (7) and the other end enters the opening of the filled device;

One end of the outer needle (12) is connected to the vacuum access tube (1) and the other end is connected to the opening of the device to be filled; the other end of the vacuum tube access tube (1) is connected to the vacuum negative pressure when vacuuming, When recovering the liquid material, it is connected with nitrogen;

The outer diameter of the inner needle (10) is smaller than the inner diameter of the opening of the filled device.

The outer needle (12) does not enter the opening of the filled device, that is, the outer needle is shorter than the inner needle.

Spring piston (2), external air pressure control chamber (3), control needle (4), main control chamber (6), needle valve (7) and liquid material storage chamber (9) are integrated in the controller housing (11) Inside.

The spring piston (2) is composed of a spring and a piston, one end of the spring is connected to the wall and the other end is connected to the piston, one end of the piston is connected to the spring and the other end is connected to the control needle (6), and one end of the piston is connected to the external air pressure The control chamber (3) is in direct contact; the spring piston (2) is composed of a spring and a piston, in order to reduce the resistance of the piston movement, lubricating oil is used between the piston and the cylinder wall.

One end of the external air pressure control chamber (3) is a retainer wall and the other end is a spring piston (2), and there is an opening connected to the external control air pressure access pipe (5), the air pressure control chamber (3) is controlled by the needle (4) Pass through, the air pressure control chamber (3) has a hole to connect with the external control air pressure access pipe (5); the external air pressure control chamber (3) is a cavity composed of a piston and a fixed cylinder wall, Connected with the external control air pressure, by applying the external control air pressure, the spring piston is compressed, and the control needle is driven to connect the liquid material storage room with the main control room; the control needle (4) is used as the switch needle of the needle valve to control the liquid material entering the main control room. Control room; the outer needle (12) has two functions, one is to evacuate, and the other is to introduce external air pressure to recover the liquid material.

When the present invention needs to fill the liquid, as shown in Figure 2a, first connect the inner needle (10) of the double-layer needle with the cavity of the workpiece to be filled, so as to ensure that the inner needle (10) enters the hole of the main control room and seals The ring (13) is well sealed, no external control air pressure is applied, the needle valve (7) remains closed (the spring piston is not compressed), the main control chamber (6), the inner needle (10) and the cavity of the workpiece to be filled form a closed The cavity, the vacuum access tube (1) is connected to the vacuum negative pressure, and the vacuum is pumped through the outer needle (12); when the required vacuum degree is reached, as shown in Figure 2b, the vacuum access tube (1) is closed and passed The external control air pressure connection pipe (5) is connected to the external control air pressure, the spring piston (2) is compressed, and the control needle (4) is driven to open the needle valve (7), and the liquid material enters the main body from the liquid material storage chamber (9). The control room (6), under the action of negative pressure, enters the cavity of the workpiece to be filled through the inner needle (10) for filling; when the liquid material fills the cavity of the workpiece to be filled, as shown in Figure 2c , use the vacuum connection tube (1) to connect positive pressure nitrogen gas, the nitrogen gas reaches the opening of the workpiece through the outer needle (12), and under the pressure of nitrogen, the liquid material in the inner needle head is pressed back to the liquid material storage chamber (9 ), also press the liquid material to the inside of the cavity of the workpiece to be filled as much as possible; disconnect the external control air pressure and nitrogen, and the spring piston resets to drive the control needle (4) to close the needle valve (7), and the liquid material storage room (9 ) is disconnected from the main control room and the filling workpiece, and the filling is completed.

Claims (6)

1. the controlled packaging process of vacuum filling is characterized in that the liquid material input system is comprised of liquid material storage chamber and needle valve, and the motion of needle valve by the control pin realizes pouring into the liquid material of main control room; Be that inside and outside syringe needle forms with the double-deck syringe needle that is connected by can device cavity by inside and outside two-layer passage, interior syringe needle is realized fluid-filling, outer syringe needle vacuumizes and introduces external pressure and reclaims liquid material, the outer attached sealing ring of syringe needle outside, sealing ring is isolated with inside and outside syringe needle and ambient atmosphere, interior syringe needle one end enters to be connected with main control room by the can workpiece perforate other end and carries out the can of liquid material, and inside and outside syringe needle is being communicated by can workpiece tapping;

Job step is as follows: at first the interior syringe needle (10) with double-deck syringe needle is connected with the cavity of workpiece to be filled, the hole of the main control room of syringe needle (10) access needle valve in guaranteeing, do not apply needle valve (7) maintenance closed condition when adding control air pressure, the interior syringe needle (10) of double-deck syringe needle is connected needle valve main control room (6), interior syringe needle (10) and workpiece to be filled chamber and forms a closed cavity with the cavity of workpiece to be filled; Vacuum access tube (1) links to each other with negative pressure of vacuum, vacuumizes by outer syringe needle (12); When reaching the vacuum degree that needs, vacuum access tube (1) is closed, open needle valve (7) by the control pin (4) that adds control air pressure control needle valve, liquid material enters main control room (6) from the pipeline that needle valve control pin unclamps from liquid material apotheca (9), and under the effect of negative pressure, enter the cavity of workpiece to be filled by interior syringe needle (10), carry out can; Be full of the cavity of workpiece to be filled when liquid material after, use the nitrogen of vacuum access tube (1) access malleation, nitrogen arrives can workpiece tapping by outer syringe needle (12), and under the pressure of nitrogen, the liquid material in the interior syringe needle is pushed back liquid material apotheca (9); Disconnection adds control air pressure, and needle valve (7) is closed, and liquid material apotheca (9) disconnects with main control room and can workpiece, and can is finished; Control pin (4) is as the switch pin of needle valve, and the control liquid material enters main control room; The effect of outer syringe needle (12) has two, and one is to vacuumize, and another is to introduce to add air pressure liquid material is reclaimed; Additional gas pressure-controlled chamber (3) is a cavity that has piston and fixing cylinder wall to consist of, and adds control air pressure UNICOM, adds control air pressure by applying, and with the spring piston compression, drives the control pin with liquid material apotheca and main control room connection; Vacuum access tube (1) one end is connected with outer syringe needle (12), and the other end is connected with negative pressure of vacuum when vacuumizing, and is connected with nitrogen when reclaiming liquid material.

2. the controlled packaging process of vacuum filling according to claim 1 is characterized in that described vacuum access tube (1) can again can be as the access port that adds nitrogen as the access port of negative pressure of vacuum, and has closing function.

3. the controlled packaging process of vacuum filling according to claim 1 and 2 is characterized in that using control pin (4) the control liquid material of different-diameter to enter main control room (6).

4. the device of the controlled can of vacuum filling, it is characterized in that comprising vacuum access tube (1), spring piston (2), additional gas pressure-controlled chamber (3), control pin (4), add control air pressure access tube (5), main control room (6), needle valve (7), by can liquid material interface (8), liquid material apotheca (9), controller housing (11), sealing ring (13); Vacuum links to each other with external pressure with vacuum with external pressure access tube one end, and the other end is connected with the outer syringe needle of double-deck syringe needle, workpiece cavity to be filled is vacuumized with follow-up adscititious gases liquid material in the syringe needle is reclaimed; The additional gas pressure control system is comprised of piston, additional gas pressure-controlled chamber, needle valve and the control pin with spring, the piston of additional gas pressure-controlled chamber connecting band spring, the unlatching of the control pin of gas piston linkage needle valve makes can liquid material input system be communicated with the main control room of needle valve or closes; Main control room one end links to each other with the internal layer of double-deck syringe needle, and the other end links to each other with can liquid material input system with the passage of the control pin of needle valve; Formed by the namely interior syringe needle (10) of inside and outside two-layer passage and outer syringe needle (12) with the double-deck syringe needle that is connected by can device cavity, interior syringe needle is realized fluid-filling, outer syringe needle vacuumizes and introduces external pressure and reclaims liquid material, the outer attached sealing ring of syringe needle outside, sealing ring is isolated with inside and outside syringe needle and ambient atmosphere, interior syringe needle one end enters to be connected with main control room by the can workpiece perforate other end and carries out the can of liquid material, and inside and outside syringe needle is being communicated by can workpiece tapping; Main control room is realized the control to can by coordinating additional gas pressure control system and liquid material input system; The motion of needle valve by the control pin realizes pouring into the liquid material of main control room.

5. the controlled filling apparatus of vacuum filling according to claim 4 is characterized in that the external diameter of interior syringe needle is than little by can device perforate internal diameter.

6. the controlled filling apparatus of vacuum filling according to claim 4 is characterized in that spring piston (2), additional gas pressure-controlled chamber (3), control pin (4), main control room (6), needle valve (7) and liquid material apotheca (9) are integrated in the controller housing (11).

Images