A double-cone vacuuming clogging prevention device

Abstract

The utility model discloses a double -cone vacuum anti -blocking device relates to double -cone drying equipment auxiliary device field, solves the problem of easy block and difficult processing of vacuum system when fine particle size, high viscosity material drying. The device includes double -cone dryer, dust cloth bag, vacuum pipeline, vacuum pump, compressed air pipeline, compressed air buffer tank, solenoid valve, switch ball valve, pulse controller, pressure gauge, buffer tank pressure gauge and temperature table, dust cloth bag is located between double -cone dryer and vacuum pipeline, switch ball valve is between the dust cloth bag and vacuum pump of vacuum pipeline, and compressed air buffer tank is connected to the dust cloth bag and switch ball valve between vacuum pipeline through the pipeline with solenoid valve, pressure gauge, temperature table monitor vacuum pipeline pressure and temperature, and pulse controller controls solenoid valve and switch ball valve, when judging bag block, pulse controller closes ball valve, opens solenoid valve, and blows the block with the compressed air in tank greater than or equal to 0.6MPa, and then restores vacuum, the device simple structure, anti -block effectively.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary devices for double cone drying equipment, specifically a device for preventing blockage during vacuuming of double cones. Background Technology

[0002] Double cone drying equipment (double cone rotary vacuum dryer) is widely used in the pharmaceutical, food, and chemical industries for removing moisture (water or organic solvents) from materials due to its low-temperature and high-efficiency drying characteristics under vacuum conditions. Its working principle involves vaporizing the moisture in the material at low temperature under vacuum, and then removing the vaporized moisture through a vacuum pump.

[0003] However, in practical applications, when the dried materials (such as thickener colloids like carrageenan, konjac gum, and xanthan gum) have fine particle sizes and are sticky when the moisture content is high, they are very prone to clogging vacuum pipes and related filter components. Existing double-cone devices usually only use simple filtration systems such as dust bags to prevent materials from entering the vacuum system, but they cannot solve the problem of dust bags clogging themselves. Once the dust bags are clogged, the vacuuming efficiency will be severely reduced, the operation time will be greatly extended, the production progress will be affected, and even the abnormal pressure in the pipes may cause safety hazards.

[0004] To address the shortcomings of the existing technology, this invention proposes a double-cone vacuum anti-clogging device that can effectively handle vacuum blockage problems. Utility Model Content

[0005] The main purpose of this invention is to provide a device for preventing blockage during double-cone vacuuming, thereby solving the aforementioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for preventing blockage during double-cone vacuum pumping, comprising a double-cone dryer, a dust collector bag, a vacuum pump pipeline, a vacuum pump, a compressed air pipeline, a compressed air buffer tank, a solenoid valve, a ball valve, a pulse controller, a pressure gauge, a pressure gauge in the buffer tank, and a thermometer; the dust collector bag is disposed at the connection end between the double-cone dryer and the vacuum pump pipeline; the end of the vacuum pump pipeline away from the double-cone dryer is connected to the vacuum pump; the ball valve is connected in series on the vacuum pump pipeline and located between the dust collector bag and the vacuum pump; one end of the compressed air pipeline is connected to the external... One end is connected to a compressed air source, and the other end is connected to the air inlet of a compressed air buffer tank. The air outlet of the compressed air buffer tank is connected to a vacuum line through a pipe, and the connection point is located between the dust collector bag and the switch ball valve. The solenoid valve is connected in series on the pipe connecting the compressed air buffer tank and the vacuum line. The pressure gauge is installed on the vacuum line and located between the dust collector bag and the switch ball valve. The pressure gauge of the buffer tank is installed on the compressed air buffer tank. The temperature gauge is installed on the vacuum line and close to the dust collector bag. The pulse controller is electrically connected to the solenoid valve and the switch ball valve respectively.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the volume of the compressed air buffer tank is not less than L, and the compressed air pressure inside the tank monitored by the buffer tank pressure gauge is not less than 0.6 MPa.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: an air filter for filtering impurities in the compressed air is also installed on the pipe connecting the compressed air buffer tank and the vacuum pipeline, and the air filter is located between the solenoid valve and the compressed air buffer tank.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the pulse controller is also electrically connected to the pressure gauge, the temperature gauge and the pressure gauge of the buffer tank, and can receive the detection data of each instrument and automatically control the operation of the solenoid valve and the ball valve according to the preset pressure threshold and temperature threshold.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the dust collector bag is made of high temperature resistant and wear resistant polytetrafluoroethylene material, and the filtration accuracy of the dust collector bag is not less than 1μm.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: a transparent sight glass for observing the material inside the pipe is installed on the vacuum pipeline, located between the dust collector bag and the double cone dryer.

[0012] The beneficial effects of this utility model are as follows: This utility model uses a pulse controller to control compressed air to instantly blow away the blockage, which can quickly remove the dust blocking the dust collector bag, effectively solve the problem of blockage in the vacuum system, ensure vacuuming efficiency, and avoid extending the operation time. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; In the diagram: 1-Double cone dryer, 2-Dust collector bag, 3-Vacuum pump line, 4-Vacuum pump, 5-Compressed air line, 6-Compressed air buffer tank, 7-Solenoid valve, 8-Switch ball valve, 9-Pulse controller, 10-Pressure gauge, 11-Buffer tank pressure gauge, 12-Thermometer. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. However, the specific implementation methods and embodiments described below are for illustrative purposes only and are not intended to limit the present invention.

[0015] See attached diagram. Figure 1This embodiment provides a device for preventing blockage during double-cone vacuuming, comprising a double-cone dryer 1, a dust collector bag 2, a vacuuming pipeline 3, a vacuum pump 4, a compressed air pipeline 5, a compressed air buffer tank 6, a solenoid valve 7, a ball valve 8, a pulse controller 9, a pressure gauge 10, a buffer tank pressure gauge 11, and a temperature gauge 12.

[0016] The dust collector bag 2 is installed at the connection end between the double cone dryer 1 and the vacuum line 3 to filter the dust generated during the drying process and prevent it from entering the subsequent vacuum system. The end of the vacuum line 3 away from the double cone dryer 1 is connected to the vacuum pump 4 to form a vacuum channel, and the vacuum pump 4 provides power for vacuuming. The switch ball valve 8 is connected in series on the vacuum line 3 and located between the dust collector bag 2 and the vacuum pump 4 to control the opening and closing of the vacuum line 3. It can also isolate the vacuum pump 4 when blockage needs to be dealt with.

[0017] One end of the compressed air pipeline 5 is connected to an external compressed air source, and the other end is connected to the air inlet of the compressed air buffer tank 6 to replenish the compressed air buffer tank 6 with compressed air. The air outlet of the compressed air buffer tank 6 is connected to the vacuum pipeline 3 through a pipe, and the connection point is located between the dust collector bag 2 and the switch ball valve 8 to ensure that the compressed air can directly act on the dust collector bag 2. The solenoid valve 7 is connected in series on the pipe connecting the compressed air buffer tank 6 and the vacuum pipeline 3 to control the release of compressed air.

[0018] Pressure gauge 10 is installed on the vacuum line 3 and located between the dust collector bag 2 and the ball valve 8. It is used to detect the pressure downstream of the dust collector bag 2. When the dust collector bag 2 is blocked, the pressure here will drop rapidly. Buffer tank pressure gauge 11 is installed on the compressed air buffer tank 6. It is used to monitor the compressed air pressure in the tank in real time to ensure that the pressure meets the requirements of pulse blowing. Temperature gauge 12 is installed on the vacuum line 3 and close to the dust collector bag 2. When the dust collector bag 2 is blocked, the temperature will drop abnormally due to the adiabatic expansion of the gas absorbing heat and the lack of new airflow.

[0019] The pulse controller 9 is electrically connected to the solenoid valve 7 and the ball valve 8, and can manually or automatically control the on / off state of the solenoid valve 7 and the opening and closing of the ball valve 8. When the pressure gauge 10 and temperature gauge 12 indicate that the dust collector bag 2 is blocked, the pulse controller 9 will control the ball valve 8 to close and simultaneously control the solenoid valve 7 to open, so that the compressed air in the compressed air buffer tank 6 will instantly enter the vacuum line 3 and be sprayed towards the dust collector bag 2, using the instantaneous pressure to blow away the dust blocking the dust collector bag 2; after the blockage is cleared, the pulse controller 9 will then control the solenoid valve 7 to close and the ball valve 8 to open, restoring normal vacuum operation.

[0020] Furthermore, the volume of the compressed air buffer tank 6 is not less than 500L to store enough compressed air to meet the air volume requirements of pulse blowing; and the compressed air pressure inside the tank must be not less than 0.6MPa to ensure sufficient pressure to blow away the blocked dust.

[0021] Furthermore, an air filter is installed on the pipeline connecting the compressed air buffer tank 6 and the vacuum line 3. The air filter is located between the solenoid valve 7 and the compressed air buffer tank 6. It can filter impurities in the compressed air and prevent impurities from entering the vacuum line 3 and affecting the operation of the equipment or contaminating materials.

[0022] Furthermore, the pulse controller 9 is also electrically connected to the pressure gauge 10, the temperature gauge 12, and the buffer tank pressure gauge 11, and can receive the detection data from each instrument. Users can preset pressure thresholds and temperature thresholds. When the pressure detected by the pressure gauge 10 is lower than the preset pressure threshold and the temperature detected by the temperature gauge 12 is lower than the preset temperature threshold, the pulse controller 9 will automatically determine that the dust collector bag 2 is blocked and start the above-mentioned blockage blowing action to achieve automated control and reduce manual intervention.

[0023] Furthermore, the dust collector bag 2 is made of polytetrafluoroethylene, which has the characteristics of high temperature resistance, wear resistance and good chemical stability, and can adapt to the working environment of the double cone drying equipment; and the filtration accuracy of the dust collector bag 2 is not less than 1μm, which can effectively filter fine-particle dust materials.

[0024] Furthermore, a transparent sight glass is installed on the vacuum line 3 between the dust collector bag 2 and the double cone dryer 1. The staff can directly observe the material accumulation inside the pipe and the working status of the dust collector bag 2 through the transparent sight glass, which helps to determine whether maintenance or cleaning is required.

[0025] In the above scheme, the compressed air buffer tank 6 has a volume of 500L, the dust collector bag 2 is made of polytetrafluoroethylene and has a filtration accuracy of 1μm, the air filter 13 has a filtration accuracy of 0.1μm, and the transparent sight glass 14 is made of high temperature resistant quartz glass.

[0026] After the device is installed, compressed air is first introduced into the compressed air buffer tank 6 through the compressed air pipeline 5. The pressure gauge 11 of the buffer tank is observed to ensure that the pressure inside the tank is stable between 0.6-0.8MPa. Then, the vacuum pump 4 is started, the ball valve 8 is opened, and the solenoid valve 7 is closed. The double cone dryer 1 starts the drying operation. The vaporized moisture carries a small amount of dust into the vacuum pipeline 3. After being filtered by the dust collector bag 2, the dust is trapped, and the clean moisture gas is discharged by the vacuum pump 4.

[0027] During operation, pressure gauge 10, temperature gauge 12, and transparent sight glass are observed in real time. As dust gradually accumulates on the surface of the dust collector bag 2, the pressure displayed on pressure gauge 10 will gradually decrease, and the temperature displayed on temperature gauge 12 will also slowly decrease. When pressure gauge 10 detects a pressure lower than the preset pressure threshold of -0.08MPa, temperature gauge 12 detects a temperature lower than the preset temperature threshold of 25℃, and dust accumulation is observed inside the pipe through the transparent sight glass, it is determined that the dust collector bag 2 is blocked.

[0028] At this time, the blow-off program is started by the pulse controller 9: the pulse controller 9 first controls the ball valve 8 to close, cutting off the connection between the vacuum pump 4 and the vacuum line 3, thus isolating the vacuum pump 4; then it controls the solenoid valve 7 to open, and the compressed air in the compressed air buffer tank 6 enters the vacuum line 3 instantly after being filtered by the air filter, and is sprayed at high speed toward the dust collector bag 2. The instantaneous impact force blows off the dust blocking the surface of the dust collector bag 2, and the blown-off dust falls back into the double cone dryer 1 with the airflow.

[0029] After the blockage is blown out for 3-5 seconds, the pulse controller 9 controls the solenoid valve 7 to close, stopping the compressed air injection; after 10-15 seconds, the switch ball valve 8 is opened to restore the vacuum pump 4's vacuuming function, and the double cone dryer 1 continues the drying operation.

[0030] If the pulse controller 9 adopts the automatic control mode, the pressure threshold such as -0.08MPa and the temperature threshold such as 25℃ can be preset in the pulse controller 9. When the detection data of the pressure gauge 10 and the temperature gauge 12 reach the preset threshold, the pulse controller 9 will automatically perform the above-mentioned purging action without manual operation, which further improves the automation level and operation efficiency of the device.

[0031] This utility model's double-cone vacuum anti-clogging device has a simple structure and reasonable design. It can effectively solve the clogging problem of the vacuum system of double-cone drying equipment by pulse blowing, ensuring vacuuming efficiency, shortening operation time, and the device is safe and hygienic. It is suitable for drying various fine-particle-size and highly viscous materials.

[0032] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A double cone vacuum blockage prevention device, characterized by: The system includes a double cone dryer (1), a dust collector bag (2), a vacuum line (3), a vacuum pump (4), a compressed air line (5), a compressed air buffer tank (6), a solenoid valve (7), a ball valve (8), a pulse controller (9), a pressure gauge (10), a buffer tank pressure gauge (11), and a thermometer (12). The dust collector bag (2) is located at the connection end between the double cone dryer (1) and the vacuum line (3). The end of the vacuum line (3) away from the double cone dryer (1) is connected to the vacuum pump (4). The ball valve (8) is connected in series on the vacuum line (3) and located between the dust collector bag (2) and the vacuum pump (4). One end of the compressed air line (5) is connected to an external compressed air source, and the other end is connected to a pressure pump. The air inlet of the compressed air buffer tank (6) is connected, and the air outlet of the compressed air buffer tank (6) is connected to the vacuum line (3) through a pipe, and the connection point is located between the dust collector bag (2) and the switch ball valve (8). The solenoid valve (7) is connected in series on the pipe connecting the compressed air buffer tank (6) and the vacuum line (3). The pressure gauge (10) is installed on the vacuum line (3) and located between the dust collector bag (2) and the switch ball valve (8). The buffer tank pressure gauge (11) is installed on the compressed air buffer tank (6). The temperature gauge (12) is installed on the vacuum line (3) and located near the dust collector bag (2). The pulse controller (9) is electrically connected to the solenoid valve (7) and the switch ball valve (8) respectively.

2. A device for preventing vacuum blockage in a double cone according to claim 1, characterized in that: The volume of the compressed air buffer tank (6) is not less than 500L, and the compressed air pressure inside the tank monitored by the buffer tank pressure gauge (11) is not less than 0.6MPa.

3. A device for preventing vacuum blockage in a double cone according to claim 1, characterized in that: An air filter for filtering impurities in compressed air is also installed on the pipe connecting the compressed air buffer tank (6) and the vacuum line (3). The air filter is located between the solenoid valve (7) and the compressed air buffer tank (6).

4. A device for preventing vacuum blockage in a double cone according to claim 1, characterized in that: The pulse controller (9) is also electrically connected to the pressure gauge (10), the temperature gauge (12) and the buffer tank pressure gauge (11), and can receive the detection data of each instrument and automatically control the operation of the solenoid valve (7) and the switch ball valve (8) according to the preset pressure threshold and temperature threshold.

5. A device for preventing vacuum blockage in a double cone according to claim 1, characterized in that: The dust collector bag (2) is made of high temperature and wear resistant polytetrafluoroethylene material, and the filtration accuracy of the dust collector bag (2) is not less than 1μm.

6. A device for preventing vacuum blockage in a double cone according to claim 1, characterized in that: On the vacuum line (3), a transparent sight glass is provided between the dust collector bag (2) and the double cone dryer (1) for observing the material inside the pipe.

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