Vacuum impregnator

Abstract

The invention relates to the technical field of vacuum impregnation, and particularly discloses a vacuum impregnator which comprises a first tank body, a second tank body and a liquid supplementing tank, the bottoms of the first tank body and the second tank body are communicated through a pipeline and provided with a first valve, and a first liquid level sensor and a second liquid level sensor are arranged in the first tank body and the second tank body respectively. The bottom of the liquid supplementing tank is communicated with the upper portions of the first tank body and the second tank body through pipelines, a second valve and a third valve are arranged on the pipelines respectively, a third liquid level sensor is arranged in the liquid supplementing tank, the liquid supplementing tank is communicated with the liquid storage tank through an oil pump, and the first tank body and the second tank body are connected with a vacuum pump through pipelines respectively. A fourth valve and a fifth valve are arranged between the first tank body and the vacuum pump and between the second tank body and the vacuum pump respectively, impregnation liquid can be reduced after being recycled for multiple times in the two tank bodies, the situation that the impregnation liquid cannot completely immerse the brake belt is prone to occurring, the impregnation liquid can be automatically supplemented into the tank bodies through the liquid supplementing tank, manual impregnation liquid adding is not needed, and the impregnation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum impregnation, in particular to a vacuum impregnation machine. Background Art

[0002] In the processing of braided brake bands, impregnation is an important process. By impregnating the brake band with impregnation liquids such as phenolic resin, the wear resistance and heat resistance of the brake band can be improved. Under a vacuum state, the air and moisture inside the parts can be extracted, and the gaps and channels left behind are conducive to the penetration of the impregnation liquid, thereby improving the impregnation efficiency and the penetration effect of the impregnation liquid.

[0003] The impregnation process of the brake band is usually to put the brake band into an impregnation machine, add an impregnation liquid to impregnate the brake band after vacuuming, make the air pressure inside and outside the impregnation machine consistent after the impregnation, open the impregnation machine to take out the brake band, and the impregnation liquid needs to be extracted before the brake band is put in next time, and then add the impregnation liquid after vacuuming. Generally, an oil storage container needs to be set. In this regard, the patent with application number "99226437.5" discloses a circulating vacuum oil impregnation machine, which is also a circulating vacuum impregnation machine. By setting two cylinders, the cylinders are connected to components such as a vacuum pump, an exhaust valve, a vacuum gauge and an intake valve, a sealing cover is provided above the cylinder, a temperature measuring thermal resistor is provided in the inner cavity, and an electric heating element is installed on the outer side of the lower part. The lower parts of the two cylinders are connected and provided with a two-way valve. While one cylinder is oiling the product under vacuum, the other cylinder can be loaded with the product to be oiled or vacuumed. After the first cylinder is oiled, the oil enters the second cylinder for impregnation. The oil is oiled in the two cylinders in turn, and there is no need to set a special oil storage container, thereby improving production efficiency. However, the oil immersion machine has the following defects: the oil is used alternately in the two cylinders, and there is oil loss after the product is immersed in the oil. After a certain number of cycles, new oil needs to be added to the cylinder manually, which is troublesome to operate. Summary of the invention

[0004] In view of the shortcomings of the prior art, the technical problem solved by the present invention is to provide a vacuum impregnation machine to solve the problem that it is inconvenient to replenish the impregnation liquid in the existing circulating impregnation machine.

[0005] To solve the above problems, the technical solution adopted by the present invention is: a vacuum impregnation machine, including a first tank body, a second tank body and a liquid replenishing tank, the first tank body and the bottom of the second tank body are connected by a pipeline and are provided with a first valve, the first tank body and the second tank body are respectively provided with a first liquid level sensor and a second liquid level sensor, the bottom of the liquid replenishing tank is connected to the first tank body and the upper part of the second tank body respectively through a pipeline and the pipeline is respectively provided with a second valve and a third valve, the liquid replenishing tank is connected to the atmosphere, the liquid replenishing tank is provided with a third liquid level sensor, the liquid replenishing tank is connected to the liquid storage tank through an oil pump, the first tank body and the second tank body are respectively connected to the vacuum pump through pipelines, the first tank body and the second tank body are respectively provided with a fourth valve and a fifth valve, the first tank body and the second tank body are respectively hinged with a first tank cover and a second tank cover, and the first tank body and the second tank body are respectively provided with a first barometer and a second barometer.

[0006] The beneficial effects of this solution are as follows: compared with the prior art, the impregnation liquid will decrease after being circulated in the first tank body and the second tank body for several times, and it is easy for the impregnation liquid to fail to completely immerse the brake belt, affecting the impregnation effect. The liquid replenishing tank can automatically replenish the impregnation liquid when the impregnation liquid in the tank body decreases, and there is no need to manually add the impregnation liquid to the tank body, thereby improving the impregnation efficiency. By automatically controlling the liquid level of the liquid replenishing tank, it can be ensured that the liquid inflow into the tank body is smoother and more controllable.

[0007] Furthermore, the first valve, the second valve, the third valve, the fourth valve and the fifth valve are solenoid valves, and their opening and closing are controlled by a control device.

[0008] Furthermore, the first liquid level sensor, the second liquid level sensor and the third liquid level sensor are ultrasonic liquid level sensors or radar liquid level sensors, and the liquid level sensors are not in contact with the immersion liquid, so as to avoid the adhesion of the immersion liquid and the influence on the measurement accuracy of the sensors.

[0009] Furthermore, a first cylinder is provided between the first tank body and the first tank cover, and a second cylinder is provided between the second tank body and the second tank cover. The cylinder can be extended and retracted to open and close the tank cover, so as to facilitate the control of opening and closing of the tank cover.

[0010] Furthermore, the first tank cover and the second tank cover are provided with observation windows to facilitate the staff to check the impregnation status. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention;

[0012] In the figure: 1-first tank body, 2-second tank body, 3-liquid replenishing tank, 4-first valve, 5-first liquid level sensor, 6-second liquid level sensor, 7-second valve, 8-third valve, 9-third liquid level sensor, 10-oil pump, 11-vacuum pump, 12-fourth valve, 13-fifth valve, 14-first tank cover, 15-second tank cover, 16-first barometer, 17-second barometer. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] Implementation example Figure 1As shown: a vacuum impregnation machine comprises a first tank body 1, a second tank body 2 and a liquid replenishing tank 3. The bottoms of the first tank body 1 and the second tank body 2 are connected by a pipeline and are provided with a first valve 4. The impregnation liquid can be circulated in the two tank bodies to improve the impregnation efficiency. The first tank body 1 and the second tank body 2 are respectively provided with a first liquid level sensor 5 and a second liquid level sensor 6. The liquid level sensors are set to detect the height of the impregnation liquid in the tank bodies in real time. The bottom of the liquid replenishing tank 3 is connected to the upper part of the first tank body 1 and the second tank body 2 respectively through a pipeline, and a second valve 7 and a third valve 8 are respectively provided on the pipeline. The liquid replenishing tank 3 is connected to the atmosphere. When the tank body needs to be supplemented with impregnation liquid, the valve is opened. Since the inside of the tank body is in a negative pressure state and the liquid replenishing tank 3 is in a normal air pressure state, the impregnation liquid in the liquid replenishing tank 3 automatically enters the tank body through the pipeline. The liquid replenishing tank 3 is provided with a third liquid level sensor 9. The liquid replenishing tank 3 is connected to the liquid storage tank through an oil pump 10. When the impregnation liquid in the liquid replenishing tank 3 is too little, the oil pump 10 is started to pump the impregnation liquid in the liquid storage tank to the liquid replenishing tank In the tank 3, the first tank body 1 and the second tank body 2 are respectively connected to the vacuum pump 11 through pipelines, and the fourth valve 12 and the fifth valve 13 are respectively provided between the first tank body 1 and the second tank body 2 and the vacuum pump 11. When the vacuum pump 11 stops running, the fourth valve 12 and the fifth valve 13 are closed to prevent gas backflow. After the impregnation is completed, the valves are opened to balance the air pressure inside and outside the tank body before the tank cover can be opened. The first tank body 1 and the second tank body 2 are respectively hinged with a first tank cover 14 and a second tank cover 15. The first tank body 1 and the second tank body 2 are respectively provided with a first barometer 16 and a second barometer 17 for measuring the air pressure inside the tank body. The first valve 4, the second valve 7, the third valve 8, the fourth valve 12 and the fifth valve 13 are solenoid valves, which are controlled to open and close by a control device. The first liquid level sensor 5, the second liquid level sensor 6 and the third liquid level sensor 9 are ultrasonic liquid level sensors or radar liquid level sensors. The liquid level sensors do not contact the impregnation liquid to avoid the adhesion of the impregnation liquid affecting the measurement accuracy of the sensor.

[0015] The specific implementation process is as follows: the above-mentioned valves, sensors, vacuum pump 11, oil pump 10 and barometer and other components are connected to the controller and controlled by the controller logic. The first liquid level sensor 5, the second liquid level sensor 6 and the third liquid level sensor 9 are respectively set to the lowest liquid level value and the highest liquid level value. The barometer is set to the impregnation pressure value and the balance pressure value. The cylinder is controlled separately and a switch for opening and closing the tank cover is provided. When the vacuum impregnation machine is used, the first valve 4 is closed, the first cylinder is started to open the first tank cover 14, the brake belt is put in, the first tank cover 14 is closed, the fourth valve 12 is opened, and the vacuum pump 11 is started to evacuate the first tank body 1. When the first barometer 16 detects that the impregnation pressure value is reached in the first tank body 1, the vacuum pump 11 is turned off. The fourth valve 12 is closed to maintain the vacuum state in the first tank body 1, the second cylinder is started to open the second tank cover 15, and the impregnation liquid is added to the second tank body 2 until it reaches the maximum liquid level value and then the addition is stopped. The second liquid level sensor 6 detects that the impregnation liquid in the second tank body 2 has reached the maximum liquid level value, and the first valve 4 is opened. Since the first tank body 1 is in a negative pressure state and the second tank body 2 is in a normal air pressure state at this time, the impregnation liquid in the second tank body 2 flows into the first tank body 1 through the bottom pipe. When the second liquid level sensor 6 detects that the impregnation liquid in the second tank body 2 flows to the minimum liquid level value, the first valve 4 is closed, and the impregnation liquid begins to impregnate the impregnation belt in the first tank body 1. During the impregnation process, the brake belt to be impregnated can be placed in the second tank body 2. The second cylinder is started and closed. The second tank cover 15 is opened, and the vacuum pump 11 is started to evacuate the second tank body 2. After the impregnation tape in the first tank body 1 is impregnated, the fourth valve 12 is opened to balance the air pressure inside and outside the first tank body 1. When the first barometer 16 detects that the air pressure in the first tank body 1 returns to the equilibrium pressure value, the first valve 4 is opened, and the impregnation liquid in the first tank body 1 flows into the second tank body 2. When the first liquid level sensor 5 detects that the impregnation liquid in the first tank body 1 flows to the lowest liquid level value, the first valve 4 is closed. At this time, if the second liquid level sensor 6 detects that the impregnation liquid in the second tank body 2 has not reached the highest liquid level value, the third valve 8 is opened, and the impregnation liquid in the liquid replenishing tank 3 flows into the second tank body 2. When the second liquid level sensor 6 detects that the impregnation liquid in the second tank body 2 has reached the highest liquid level value , the third valve 8 is closed, the replenishment of the impregnating liquid is completed, and the impregnation of the impregnating belt in the second tank body 2 is started; then the first tank cover 14 is opened to take out the impregnated brake belt and then put in the new brake belt to be impregnated, and the operation is cyclically carried out. The impregnating liquid is circulated in the two tank bodies. If the impregnating liquid flows from the second tank body 2 to the first tank body 1, the second liquid level sensor 6 detects that the impregnating liquid in the second tank body 2 is at the lowest liquid level value and the first liquid level sensor 5 detects that the impregnating liquid in the first tank body 1 has not reached the highest liquid level value, then the second valve 7 is opened, and the impregnating liquid in the liquid replenishing tank 3 flows into the first tank body 1 for replenishment. When the first liquid level sensor 5 detects that the impregnating liquid in the first tank body 1 has reached the highest liquid level value, the second valve 7 is closed to complete the replenishment.After multiple replenishments, the impregnation liquid in the liquid replenishment tank 3 is reduced. When the third liquid level sensor 9 detects that the impregnation liquid in the liquid replenishment tank 3 is at the lowest liquid level, the oil pump 10 is started to pump the impregnation liquid in the liquid storage tank into the liquid replenishment tank 3. When the third liquid level sensor 9 detects that the impregnation liquid is at the highest liquid level, the oil pump 10 is turned off. The impregnation machine is provided with two tank bodies, and the impregnation liquid can be circulated in the two tank bodies. When the impregnation liquid is lost after multiple cycles, it can be replenished in time through the liquid replenishment tank 3, effectively avoiding the situation where the impregnation liquid in the tank body cannot completely immerse the brake belt, and no manual replenishment is required, which is efficient and convenient to operate.

[0016] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A vacuum impregnation machine, comprising a first tank body, a second tank body and a liquid replenishing tank, characterized in that: The bottom of the first tank body is connected with the second tank body through a pipeline and is provided with a first valve, the first tank body and the second tank body are respectively provided with a first liquid level sensor and a second liquid level sensor, the bottom of the liquid replenishing tank is connected with the upper part of the first tank body and the second tank body through a pipeline and the pipeline is respectively provided with a second valve and a third valve, the liquid replenishing tank is connected with the atmosphere, the liquid replenishing tank is provided with a third liquid level sensor, the liquid replenishing tank is connected with the liquid storage tank through an oil pump, the first tank body and the second tank body are respectively connected to the vacuum pump through pipelines, the first tank body and the second tank body are respectively provided with a fourth valve and a fifth valve, the first tank body and the second tank body are respectively hinged with a first tank cover and a second tank cover, and the first tank body and the second tank body are respectively provided with a first barometer and a second barometer.

2. The vacuum impregnation machine according to claim 1, characterized in that: The first valve, the second valve, the third valve, the fourth valve and the fifth valve are solenoid valves.

3. The vacuum impregnation machine according to claim 1, characterized in that: The first liquid level sensor, the second liquid level sensor and the third liquid level sensor are ultrasonic liquid level sensors or radar liquid level sensors.

4. The vacuum impregnation machine according to claim 1, characterized in that: A first cylinder is arranged between the first tank body and the first tank cover, and a second cylinder is arranged between the second tank body and the second tank cover.

5. The vacuum impregnation machine according to claim 1, characterized in that: The first tank cover and the second tank cover are provided with observation windows.

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