Full-automatic vacuum pressurizing intermittent pre-foaming machine

Abstract

The utility model discloses a full-automatic vacuum pressurizing intermittent pre-foaming machine which comprises a vacuum drying tank, a pre-foaming tank is fixedly connected to the upper surface of the vacuum drying tank, an electric telescopic rod is fixedly connected to the upper top wall of the vacuum drying tank through a support, and a discharging door is fixedly connected to the output end of the electric telescopic rod. The side surface of the vacuum drying tank is fixedly connected with a vacuum pipeline and provided with a pneumatic butterfly valve, the end, close to the vacuum drying tank, of the vacuum pipeline is fixedly connected with a screen, the side surface of the vacuum pipeline is provided with a vacuum valve, and the side surface of the vacuum pipeline is provided with a pneumatic angle valve. A butterfly valve is arranged on the side surface of the vacuum compensation air bag, and a manual ball valve is arranged on the side surface of the vacuum compensation air bag. By means of the components, the structure of the vacuum pipeline, the vacuum valve and the vacuum pump is used, bubble particles are rapidly cooled and dried according to the vacuum flowing principle, the productivity of equipment is improved, and the defects that a traditional air blower is long in drying time and high in energy consumption are overcome.

Description

Technical Field

[0001] This utility model relates to the technical field of EPS expandable polystyrene production equipment, and in particular to a fully automatic vacuum-type pressurized intermittent pre-expansion machine. Background Technology

[0002] Existing fully automatic vacuum-type pressurized intermittent pre-expanding machines place the pre-expanded granules into a dedicated drying bed. Hot air is circulated through the bottom of the drying bed by a blower to dry the granules. Although this method can completely dry the granules, the traditional method of drying with a blower is time-consuming, energy-intensive, and has low output. This device uses the principle of vacuum flow, which enables the granules to cool and dry rapidly, greatly shortening the drying time and significantly increasing the equipment's capacity. Utility Model Content

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a fully automatic vacuum-type pressurized intermittent pre-expansion machine. After the foamed granules in the pre-expansion tank are sent into the vacuum drying tank, the vacuum drying tank is sealed, and a vacuum pump drives the air flow in the vacuum drying tank. The principle of air flow is used to rapidly cool and dry the granules. By creating a negative pressure in the vacuum pipeline, residual steam, water vapor, pentane, etc. during the foaming process are extracted along with the vacuum pipeline, which improves the drying effect of the granules. Through this structure, the drying time of the granules is greatly shortened and the production capacity of the equipment is greatly increased.

[0004] This utility model also provides a fully automatic vacuum-type pressurized intermittent pre-expansion machine, comprising: a vacuum drying tank, a pre-expansion tank fixedly connected to the upper surface of the vacuum drying tank, an electric telescopic rod fixedly connected to the upper top wall of the vacuum drying tank via a bracket, a discharge gate fixedly connected to the output end of the electric telescopic rod, a vacuum pipeline fixedly connected to the side surface of the vacuum drying tank, and a pneumatic butterfly valve provided on the side surface of the vacuum drying tank;

[0005] A screen is fixedly connected to one end of the vacuum pipeline near the vacuum drying tank. A vacuum valve is provided on the side surface of the vacuum pipeline, and a pneumatic angle valve is provided on the side surface of the vacuum pipeline.

[0006] The vacuum compensation air bag has a butterfly valve and a manual ball valve installed on its side surface. Through these components, using a structure of vacuum pipelines, vacuum valves, and a vacuum pump, and utilizing the principle of vacuum flow, the air bubbles are rapidly cooled and dried, improving the equipment's production capacity and overcoming the shortcomings of traditional blowers, such as long drying time and high energy consumption.

[0007] According to the fully automatic vacuum-type intermittent pre-evaporation machine of this utility model, a temperature sensor is fixedly connected to the side surface of the vacuum drying tank, and a vacuum degree detection point is fixedly connected to the side surface of the vacuum drying tank. The temperature sensor and the vacuum degree detection point can be used to detect the temperature and vacuum degree in the vacuum drying tank, respectively.

[0008] According to the fully automatic vacuum-type intermittent pre-expanding machine of this utility model, there are four manual ball valves evenly distributed. The end of each manual ball valve away from the vacuum compensation gas bag is fixedly connected to the vacuum drying tank through a pipe. This allows atmospheric air to enter the vacuum drying tank from four directions through the four manual ball valves at a relatively small flow rate, avoiding extreme negative pressure conditions.

[0009] According to the fully automatic vacuum-type pressurized intermittent pre-expansion machine of this utility model, a vacuum pump is fixedly connected to the end of the vacuum pipeline away from the vacuum drying tank, and the screen is located inside the vacuum drying tank. The vacuum pump can be used to remove residual steam, water vapor, pentane, etc., during the foaming process of the foam particles along with the vacuum pipeline.

[0010] According to the fully automatic vacuum-type pressurized intermittent pre-expansion machine of this utility model, a transfer chamber is fixedly connected to the lower surface of the vacuum drying tank, and a pneumatic butterfly valve is located between the vacuum drying tank and the transfer chamber. After drying, the pneumatic butterfly valve can be opened to discharge the dried foam particles into the transfer chamber for the next step of foam particle conveying.

[0011] According to the fully automatic vacuum-type intermittent pressurized pre-expansion machine of this utility model, the discharge gate is fixedly connected to the pre-expansion tank during operation, and the side surface of the discharge gate is slidably connected to the vacuum drying tank. An electric telescopic rod can be used to open the discharge gate, allowing the foamed particles in the pre-expansion tank to be discharged into the vacuum tank through the discharge gate, and the discharge gate is closed again after operation. Beneficial effects

[0012] Compared with existing technologies, this method involves sending the foamed granules from the pre-foaming tank into a vacuum drying tank, sealing the tank, and using a vacuum pump to drive airflow within the tank. This airflow principle allows the granules to cool and dry rapidly. Furthermore, by creating negative pressure in the vacuum pipeline, residual steam, water vapor, pentane, and other substances generated during the foaming process are extracted along with the vacuum pipeline, improving the drying effect on the granules. This structure significantly shortens the drying time of the granules and greatly increases the equipment's capacity. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0014] Figure 1 This is an overall structural diagram of the fully automatic vacuum-type pressurized intermittent pre-ejector of this utility model;

[0015] Figure 2 This is a structural diagram of the internal structure of the vacuum drying tank of the fully automatic vacuum-type pressurized intermittent pre-evaporator of this utility model.

[0016] Legend:

[0017] 1. Vacuum drying tank; 2. Discharge gate; 3. Pre-expansion tank; 4. Pneumatic butterfly valve; 5. Transfer chamber; 6. Vacuum pipeline; 7. Screen; 8. Vacuum compensation air bag; 9. Vacuum degree detection point; 10. Vacuum valve; 11. Temperature sensor; 12. Butterfly valve; 13. Manual ball valve; 14. Pneumatic angle valve; 15. Electric telescopic rod. Detailed Implementation

[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0019] Reference Figure 1-2 The present invention relates to a fully automatic vacuum-type pressurized intermittent pre-expansion machine, comprising: a vacuum drying tank 1, a pre-expansion tank 3 fixedly connected to the upper surface of the vacuum drying tank 1, an electric telescopic rod 15 fixedly connected to the upper top wall of the vacuum drying tank 1 via a bracket, a discharge gate 2 fixedly connected to the output end of the electric telescopic rod 15, the discharge gate 2 being fixedly connected to the pre-expansion tank 3 during operation, the side surface of the discharge gate 2 being slidably connected to the vacuum drying tank 1, a vacuum pipeline 6 fixedly connected to the side surface of the vacuum drying tank 1, a vacuum pump fixedly connected to the end of the vacuum pipeline 6 away from the vacuum drying tank 1, and a pneumatic butterfly valve 4 provided on the side surface of the vacuum drying tank 1;

[0020] Specifically, the EPS pellets first undergo foaming in the pre-expansion tank 3, and then the electric telescopic rod 15 opens the discharge door 2 to allow the pellets to enter the vacuum drying tank 1. After the discharge is completed, the electric telescopic rod 15 drives the discharge door 2 to close, and at the same time, the pneumatic butterfly valve 4 at the bottom of the vacuum drying tank 1 remains closed, so that the vacuum drying tank 1 forms an independent and sealed space. After drying is completed, the pneumatic butterfly valve 4 opens, allowing the dried pellets to be discharged through the pneumatic butterfly valve 4 due to their own weight.

[0021] A screen 7 is fixedly connected to one end of the vacuum pipeline 6 near the vacuum drying tank 1. The screen 7 is located inside the vacuum drying tank 1. A vacuum valve 10 is provided on the side surface of the vacuum pipeline 6, and a pneumatic angle valve 14 is provided on the side surface of the vacuum pipeline 6.

[0022] Specifically, vacuum line 6 is connected to the vacuum system and starts working after vacuum drying tank 1 is closed. First, vacuum valve 10 is opened and vacuum pump at the other end of vacuum line 6 is turned on. Under the action of negative pressure, residual steam, water vapor, pentane and other substances in the foaming process of the foam particles are drawn away along with vacuum line 6. Since the aperture of screen 7 is much smaller than the diameter of the foam particles, the foam particles will not be carried away by the vacuum. After drying is completed, vacuum valve 10 is closed and pneumatic angle valve 14 is opened, and the vacuum in vacuum drying tank 1 disappears quickly.

[0023] The vacuum compensation gas bag 8 has a butterfly valve 12 on its side surface and a manual ball valve 13 on its side surface. There are four manual ball valves 13, which are evenly distributed. The end of the manual ball valve 13 away from the vacuum compensation gas bag 8 is fixedly connected to the vacuum drying tank 1 through a pipe.

[0024] Specifically, when the bubbles are drying, the vacuum compensation air bag 8 is connected to the atmosphere through the butterfly valve 12, and the manual ball valve 13 on the vacuum compensation air bag 8 is opened to a preset opening degree. Atmosphere is introduced into the vacuum drying tank 1 from four directions at a relatively small flow rate to avoid extreme negative pressure. In order to prevent the bubbles from accumulating at the screen 7 and clogging the screen 7 due to the vacuum, the butterfly valve 12 and the manual ball valve 13 of the vacuum compensation air bag 8 remain open when the vacuum in the vacuum drying tank 1 is eliminated, so that the air pressure in the tank is quickly made consistent with the atmosphere.

[0025] A temperature sensor 11 is fixedly connected to the side surface of the vacuum drying tank 1, a vacuum degree detection point 9 is fixedly connected to the side surface of the vacuum drying tank 1, a transfer chamber 5 is fixedly connected to the lower surface of the vacuum drying tank 1, and a pneumatic butterfly valve 4 is located between the vacuum drying tank 1 and the transfer chamber 5.

[0026] Specifically, vacuum detection point 9 monitors the vacuum level inside the tank in real time, and adjusts the changes in vacuum level through the program built into the PLC to achieve vacuum stability. During the cooling and drying process of the foam particles, temperature sensor 11 detects the temperature until the set value is reached. After drying, the foam particles are discharged into the transfer chamber 5 for the next step of foam particle transportation.

[0027] Working principle: EPS granules first undergo foaming in the pre-expansion tank 3. Then, the electric telescopic rod 15 opens the discharge door 2, allowing the granules to enter the vacuum drying tank 1. After discharge, the electric telescopic rod 15 closes the discharge door 2, and simultaneously, the pneumatic butterfly valve 4 at the bottom of the vacuum drying tank 1 remains closed, creating an independent, sealed space. The vacuum pipeline 6 begins operation after the vacuum drying tank 1 is closed. First, the vacuum valve 10 opens, and then the vacuum pump at the other end of the vacuum pipeline 6 is activated. Under negative pressure, residual steam, water vapor, pentane, etc., from the granule foaming process are extracted along with the vacuum pipeline 6. Since the aperture of the screen 7 is much smaller than the diameter of the bubbles, the bubbles will not be carried away by the vacuum. In order to prevent the bubbles from accumulating at the screen 7 and clogging the screen 7 due to the vacuum, the vacuum compensation air bag 8 is connected to the atmosphere through the butterfly valve 12, and the manual ball valve 13 on the vacuum compensation air bag 8 is opened to a preset opening degree. The atmosphere is then uniformly introduced into the vacuum drying tank 1 from four directions at a relatively small flow rate to avoid extreme negative pressure. The vacuum degree detection point 9 monitors the vacuum degree in the tank in real time, and adjusts the changes in vacuum degree through the program set in the PLC to achieve vacuum stability. Due to the principle of vacuum flow, the bubbles are quickly cooled and dried. When the temperature reaches the set value, the temperature sensor 11 operates, the vacuum valve 10 closes, and the pneumatic angle valve 14 opens, causing the vacuum in the vacuum drying tank 1 to disappear rapidly. At this time, the butterfly valve 12 of the vacuum compensation air bag 8 and the manual ball valve 13 remain open, so that the air pressure in the tank quickly becomes consistent with the atmosphere. After drying is completed, the pneumatic butterfly valve 4 opens, allowing the dried granules to be discharged through the pneumatic butterfly valve 4 due to their own weight and sent to the transfer chamber 5 for the next step of granule conveying.

[0028] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A full-automatic vacuum type pressurized intermittent preforming machine, characterized in that, Include: Vacuum drying tank (1), the upper surface of the vacuum drying tank (1) is fixedly connected with pre-evaporation tank (3), the upper top wall of the vacuum drying tank (1) is fixedly connected with electric telescopic rod (15) through support, the output end of the electric telescopic rod (15) is fixedly connected with discharge door (2), the side surface of the vacuum drying tank (1) is fixedly connected with vacuum pipeline (6), the side surface of the vacuum drying tank (1) is provided with pneumatic butterfly valve (4); The end of the vacuum pipeline (6) close to the vacuum drying tank (1) is fixedly connected with screen (7), the side surface of the vacuum pipeline (6) is provided with vacuum valve (10), the side surface of the vacuum pipeline (6) is provided with pneumatic angle valve (14); Vacuum compensation gas bag (8), the side surface of the vacuum compensation gas bag (8) is provided with butterfly valve (12), the side surface of the vacuum compensation gas bag (8) is provided with manual ball valve (13).

2. The fully automatic vacuum type pressurized intermittent preforming machine according to claim 1, characterized in that, The side surface of the vacuum drying tank (1) is fixedly connected with temperature sensor (11), the side surface of the vacuum drying tank (1) is fixedly connected with vacuum degree detection point (9).

3. The fully automatic vacuum type pressurized intermittent preforming machine according to claim 1, characterized in that, The manual ball valve (13) has four and equidistant distribution, the end of the manual ball valve (13) away from the vacuum compensation gas bag (8) is fixedly connected with the vacuum drying tank (1) through pipeline.

4. The fully automatic vacuum type pressurized intermittent preforming machine according to claim 1, characterized in that, The end of the vacuum pipeline (6) away from the vacuum drying tank (1) is fixedly connected with vacuum pump, the screen (7) is located in the inside of the vacuum drying tank (1).

5. The fully automatic vacuum type pressurized batch type preforming machine according to claim 1, characterized in that, The lower surface of the vacuum drying tank (1) is fixedly connected with transfer bin (5), the pneumatic butterfly valve (4) is located between the vacuum drying tank (1) and the transfer bin (5).

6. The fully automatic vacuum type pressurized batch type preforming machine according to claim 1, wherein The discharge door (2) is fixedly connected with the pre-evaporation tank (3) in work, the side surface of the discharge door (2) is slidably connected with the vacuum drying tank (1).

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