RU2769778C1 - Device for products vacuuming - Google Patents

Abstract

FIELD: products vacuuming.

SUBSTANCE: invention relates to means for vacuuming products for the required time while maintaining the vacuum in the required range. The device for vacuuming products contains a sealed working chamber with a lid, which has a means for opening and closing the lid and a sensor for closing the lid. The working chamber is connected to a vacuum pump and atmosphere. A control unit, the outputs of which are connected to the corresponding input of the vacuum pump, which, in turn, is connected to the working chamber through a controlled bypass valve, and to the atmosphere through a controlled solenoid valve. The control inputs of the valves are connected to the corresponding outputs of the control unit. At the same time, the means for opening and closing the lid is automated; for this, an electric motor, a lid opening sensor and a sensor for monitoring the presence of products in the working chamber are introduced into the device. An additional valve and a pressure sensor for preliminary evacuation of the line are introduced into the line between the valve connecting the chamber with the vacuum pump. The control unit is equipped with additional outputs for automatic control of the electric motor, a lid opening sensor, a sensor for monitoring the presence of products in the chamber, an additional valve and a pressure sensor.

EFFECT: creation of a device for products vacuuming, which provides holding products for a certain time at a given pressure with increased productivity, constant readiness for work with full automation of work.

3 cl, 1 dwg

Description

The invention relates to means for evacuating products for the required time while maintaining the vacuum in the required range.

A device for evacuation is known (utility model to the patent of the Russian Federation No. 43457, IPC A61K 35/78, 2004). pertaining to devices for obtaining a vacuum in order to preserve foodstuffs longer.

The device for evacuation is a container closed with a lid with a gasket. Two fittings from an automobile tubeless tire are installed in the cover. The rubber parts of the fittings are made of a material used in the food and medical industries. One fitting with a spool is designed for evacuation and is connected to a vacuum pump. Another nipple without spool for vacuum control. A device for measuring vacuum is connected to it.

The disadvantages of such a device are the following:

1. Low accuracy of the device for measuring vacuum.

2. Low productivity, because The vacuum device only works in manual mode.

3. The inability to connect it to an automated line.

The closest analogue is a vacuum packaging method and a device for its implementation (RF patent No. 2347728, IPC V65V 31/00, 2007), relating to methods and means for packaging products in sealed bags under special air conditions, namely in chambers under vacuum.

The disadvantages of such a device are the following:

1. The device does not have full automation of the evacuation process, in particular, the automatic mode of opening the working chamber lid is not implemented.

2. The inclusion of a receiver in the vacuum chamber to increase productivity complicates the process of its operation, while the gain in vacuum time is not achieved. Reducing the pumping time is possible for the second scheme with constant operation of the pump (constant maintenance of vacuum in the line is implemented), while there is no way to determine the vacuum level. When the lid is closed and the valve is opened, a situation with increased vacuum in the evacuation chamber may occur due to the lack of a pressure sensor between the valve and the pump.

3. There is no sensor for monitoring the presence of the product, which does not allow the automatic placement of the product in the working area in the vacuum chamber.

4. When several such devices are located in the same room, an increased noise level occurs, since according to the scheme, the vacuum pump is located next to the chamber.

5. The lack of a seal between the cover and the working chamber leads to the impossibility of realizing a low vacuum even when the pump is constantly running.

The objective of the proposed invention is to create a device for vacuuming products, providing holding products for a certain time at a given pressure with increased productivity, constant readiness for work with full automation of work.

The technical result of the proposed solution is to increase productivity by reducing the time for vacuuming the chamber and fully automating the process of vacuuming products.

The specified technical result is achieved by the fact that the evacuation chamber and the pumping room are connected by a line that is always under vacuum, and also due to the complete automation of the evacuation process. for which the control unit is responsible. The vacuum chamber consists of a chamber with a product presence sensor, a lid, a seal, a closing mechanism that includes an electric motor, switches for opening and closing the lid, a part of the line that includes branch pipes, a vacuum gauge and electromagnetic valves. The pumping station consists of a pump, solenoid valves and a vacuum gauge. The vacuuming complex is controlled automatically from the control unit. The control unit controls the time and amount of vacuum in the chamber using pressure sensors. When the vacuum decreases, the control unit opens the valves located in the line, and the pump pumps to the upper level. The control unit also starts the engine to open and close the chamber, install and remove products, and control the presence of products in the chamber.

In FIG. 1 schematically shows a device for vacuuming products, where: RT1, RT2 - vacuum gauge; VE1, VE2 - solenoid valve; D1 - electric motor; P1 - lid opening sensor (switch), P2 - lid closing sensor (switch); P3 - sensor for monitoring the presence of products; VE3, VE4 - solenoid valve; NI1 - pump.

To reduce the pumping time of the chamber, the control unit, before the products arrive at the vacuum chamber, evacuates part of the line to the VE2 valve. Due to the larger volume of the line from the pump to the VE2 valve than from the VE2 valve to the evacuation chamber, taking into account the volume of the chamber itself, when the VE2 valve is opened, the evacuation chamber is immediately evacuated with access to the operating mode.

The device for evacuating products, shown in figure 1, works as follows.

Before the cassette with the product arrives at the vacuum chamber, the operator from the control unit turns on the vacuum chamber by entering the "Start" command. When the command is executed, the following actions are automatically performed:

- solenoid valves VE1, VE3 open;

- after one minute the solenoid valve VE3 closes;

- pump NI1 is switched on;

- the decrease in absolute pressure in the manifold of the pump NI1 is controlled, according to the measurements of the vacuum gauge RT2;

- after the pressure in the manifold of the pump NI1 drops to a predetermined level, the solenoid valve VE4 opens and the pumping of the line to the vacuum chamber begins;

- after the pressure drops to a predetermined level in the line to the solenoid valve VE2, the “Ready” state is set, the vacuum chamber is ready for operation.

If the pumping time in each section (before the solenoid valve VE4, before the solenoid valve VE2) is more than 15 minutes, the "Fault" state is set, accompanied by color and sound alarms, and further operation of the chamber is blocked. Leaks in the line are checked and eliminated, after which a restart occurs.

When the cassette with the product approaches the vacuum chamber, the D1 electric motor is turned on and the chamber lid begins to open. After the cover is fully opened, switch P1 is pressed and the electric motor D1 stops. The cassette with the product is automatically lowered into the chamber. When the product is correctly installed, the sensor for monitoring the presence of the product P3 is activated, the electric motor D1 turns on and the lid begins to close. Due to the seal between the lid and the chamber, the lid is tightly pressed against the chamber with no leakage. After the cover is completely closed, switch P2 is pressed and the electric motor D1 stops.

After the chamber cover is completely closed, the solenoid valve VE1 closes, disconnecting the chamber from the atmosphere, and the solenoid valve VE2 opens, connecting the vacuum chamber with the pump NI1, pumping air out of the chamber. When the set vacuum is reached in the chamber, the solenoid valve VE2 closes, the “Operation” state is set, and the vacuum time countdown begins. If the pumping time of the chamber is more than 15 min. the "Fault" state is set, accompanied by color and sound alarms, further operation of the camera is blocked.

The absolute pressure in the chamber is controlled by the measurements of the RT1 vacuum gauge, the exposure time is controlled by the control unit.

During the exposure of the cassette with products, the absolute pressure in the vacuum chamber is controlled by measurements of the RT1 vacuum gauge. If the vacuum drops below the allowable limit, the following actions are automatically performed:

- solenoid valve VE2 opens:

- when the required vacuum is reached, the solenoid valve VE2 closes. When the opening cycle of the solenoid valve VE2 is less than 2 minutes, the "Fault" state is set, accompanied by color and sound alarms, further operation of the chamber is blocked.

If the pressure in the chamber goes out of the set working range, the counting of the exposure time of the products is suspended, and continues only after the pressure returns to the set working range.

At the end of the exposure of the products, the solenoid valve VE2 closes (if it was open), the solenoid valve VE1 opens, connecting the chamber with the atmosphere. After equalizing the pressure in the chamber with atmospheric pressure, the state "End of cycle" is set. When approaching the vacuum chamber of the device for extracting the cassette, the electric motor D1 is turned on and the chamber cover is opened. After the cover is fully opened, switch P1 is pressed and the electric motor D1 stops. The cassette is automatically ejected. The P3 sensor is activated, which informs about the absence of a cassette in the chamber, the D1 electric motor is turned on and the lid begins to close. After the cover is completely closed, switch P2 is pressed and the electric motor D1 stops. In this case, the solenoid valves VE2, VE3 are closed, VE1, VE4 are open. The pressure in the line up to the solenoid valve VE2 must be within the operating range (in case of discrepancy, pumping down to the required level is performed). The chamber enters the "Ready" state, waiting for the next product cassette to be fed.

This technical solution makes it possible to develop a device for evacuating products, which ensures holding products for a certain time at a given pressure with increased productivity, constant readiness for work and full automation of work.

As an example of a specific industrial implementation of a device for vacuuming products, a complex for vacuuming can serve.

The complex for evacuation includes a cover and a chamber made of aluminum alloy AMg6 GOST 4784-97, a seal made of a cord 1-2C ∅5 GOST 6467-79, a line assembled from fittings (clamps, tees, flanges, branch pipes) from Anest Iwata, thermal vacuum gauge TPR280 Pfeiffer Vacuum (RT1, RT2). solenoid angle valves 26424-KE61 (VE1, VE2), servo drive SPSh20-23017 (D1), switches based on microswitches D701 (P1, P2), inductive switch ISB W12S8-31P-1.5-10 (P3), electromagnetic through valve 26528-KE61 (VE3, VE4), fore vacuum pump Anest Iwata ISP-250C (NI1).

The tests carried out show that the developed device for vacuuming products ensures vacuuming of products at a given pressure and for a certain time this increases productivity by reducing the time for vacuuming the chamber and fully automating the process of vacuuming products.

Claims (3)

1. A device for evacuating products, containing a sealed working chamber with a lid having a means for opening and closing the lid and a lid closing sensor, the working chamber is connected to a vacuum pump and the atmosphere, a control unit, the outputs of which are connected to the corresponding input of the vacuum pump, which, in turn, in turn, is connected to the working chamber through a controlled bypass valve, and to the atmosphere through a controlled electromagnetic valve, the control inputs of the valves are connected to the corresponding outputs of the control unit, characterized in that the means for opening and closing the lid is automated, for this purpose an electric motor and an opening sensor are introduced into the device covers and a sensor for monitoring the presence of products in the working chamber, an additional valve and a pressure sensor for preliminary evacuation of the line are introduced into the line between the valve for connecting the chamber with a vacuum pump, and the control unit is equipped with additional outputs for automatic control of the electric motor, yes lid opening sensor, product presence control sensor in the chamber, additional valve and pressure sensor. 2. The device according to claim 1, characterized in that a seal is installed between the cover and the chamber. 3. The device according to claim 1, characterized in that the pump with solenoid valves and pressure sensor is located in a separate room.

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