A vacuum pump pre-neutralization tank

Abstract

This utility model relates to the field of vacuum pump pretreatment technology, and discloses a vacuum pump pretreatment neutralization tank, including a tank body with a cavity inside the tank containing a solution. The tank body has an inlet pipe and an extraction pipe, both of which are connected to the cavity. The end of the extraction pipe near the cavity is above the liquid surface of the solution, while the end of the inlet pipe near the cavity extends below the liquid surface of the solution. The tank body has a first sensor for detecting the pH value of the solution. The tank body also has a replenishment pipe and an outlet pipe, both of which are connected to the cavity. The replenishment pipe is above the liquid surface of the solution, and the outlet pipe is located at the bottom of the tank body. Both the replenishment and outlet pipes are equipped with valves for controlling their opening and closing. This neutralization tank can automatically replace the solution inside the neutralization tank when the vacuum pump extracts gas through it, reducing the workload of operators.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump pretreatment technology, and in particular to a vacuum pump pretreatment neutralization tank. Background Technology

[0002] In industries such as lead-acid batteries and lithium batteries, vacuum pumps are required in the manufacturing process. Since the electrolyte contains acidic solutions, some of these solutions will evaporate into acidic gases. When a vacuum pump is used for evacuation, these acidic gases will enter the vacuum pump along with the air. The acidic gases will corrode the pump body and reduce the service life of the vacuum pump. Therefore, a neutralization tank is usually connected before the vacuum pump to increase the pH value of the acidic gas, thereby preventing the vacuum pump from being corroded by the acidic gas.

[0003] CN202121795024 discloses a gas suction device, including: a vacuum pump; and a purification component, disposed on the vacuum pump, for purifying the gas entering the vacuum pump. The purification component includes: a buffer tank; a neutralizing agent disposed inside the buffer tank; an inlet pipe disposed on the buffer tank, one end of which is connected to the buffer tank; and an outlet pipe disposed on the buffer tank, one end of which is connected to the buffer tank and the other end of which is connected to the vacuum pump. This suction device neutralizes acidic substances in the gas through the buffer tank and the neutralizing agent inside, preventing acidic substances from entering the vacuum pump, effectively protecting the vacuum pump and extending its service life. However, it is impossible to clearly understand the usage of the neutralizing agent in the buffer tank. The neutralizing agent can only be replaced periodically and quantitatively to ensure its effectiveness. This method is wasteful of the neutralizing agent and requires a significant workload for operators.

[0004] The technical problem this invention aims to solve is: how to automatically replace the solution in the neutralization tank when the vacuum pump extracts gas through the neutralization tank, thereby reducing the workload of the workers. Utility Model Content

[0005] The main purpose of this invention is to provide a pre-neutralization tank for a vacuum pump. By installing a first sensor inside the tank to detect the pH value of the solution in the chamber, the solution in the chamber can be replaced according to the pH value of the solution through valves in the replenishment pipe and the outlet pipe. This eliminates the need for timed and quantitative replacement of the solution, avoiding waste. Moreover, by controlling the opening and closing of the valves, the workload of the staff is reduced.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] A vacuum pump pre-neutralization tank includes a tank body with a cavity inside the tank containing a solution. The tank body has an inlet pipe and an exhaust pipe, both of which are connected to the cavity. One end of the exhaust pipe near the cavity is above the surface of the solution, while the other end of the inlet pipe near the cavity extends below the surface of the solution. The tank body is equipped with a first sensor for detecting the pH value of the solution. The tank body also has a replenishment pipe and an outlet pipe, both of which are connected to the cavity. The replenishment pipe is located above the surface of the solution, and the outlet pipe is located at the bottom of the tank body. Both the replenishment pipe and the outlet pipe are equipped with valves for controlling their opening and closing.

[0008] Preferably, the tank is equipped with a second sensor, which is used to detect the liquid level of the solution in the cavity.

[0009] Preferably, the system further includes a control unit, which is electrically connected to the first sensor, the second sensor, and the valve, respectively.

[0010] Preferably, the air inlet pipe includes a horizontal section and a vertical section. The horizontal section extends horizontally in the axial direction, one end of which is connected to the vertical section, and the other end extends outside the tank. The vertical section extends vertically in the axial direction and is located inside the cavity. The end of the vertical section away from the horizontal section extends below the liquid surface of the solution.

[0011] Preferably, the outlet pipe is equipped with a water pump, which is used to draw the solution out of the cavity.

[0012] Preferably, the tank body is provided with a filter plate, the sidewall of the filter plate is connected to the inner wall of the cavity, and the filter plate is located between the air extraction pipe and the air inlet pipe.

[0013] Preferably, there are multiple filter plates, which are arranged obliquely on the inner wall of the cavity in a vertical direction. The upper surfaces of the multiple filter plates are parallel to each other, and a baffle channel is formed between the multiple filter plates.

[0014] Compared with existing technologies, this solution has the following advantages:

[0015] The pre-neutralization tank in this case uses a first sensor inside the tank to detect the pH value of the solution in the chamber. When the pH value of the solution is lower than a preset threshold, the solution is first discharged by controlling the valve of the outlet pipe, and then the new solution is replenished into the chamber by controlling the valve of the replenishment pipe. This achieves the replacement of the solution in the chamber without the need for timed and quantitative replacement of the solution, thus avoiding solution waste. Moreover, the replacement is carried out by controlling the opening and closing of the valve, which reduces the workload of the staff. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the vacuum pump pre-neutralization tank in Example 1;

[0017] Figure 2 This is a schematic diagram of the vacuum pump pre-neutralization tank in Example 2.

[0018] The components include: tank 1; cavity 2; solution 3; air inlet pipe 4; air extraction pipe 5; first sensor 6; replenishment pipe 7; outlet pipe 8; valve 9; second sensor 10; water pump 11; filter plate 12; baffle channel 13; horizontal section 41; and vertical section 42. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this application implemented as described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Example 1

[0021] refer to Figure 1 A vacuum pump pre-neutralization tank includes a tank body 1, a cavity 2 inside the tank body 1, a solution 3 stored in the cavity 2, an inlet pipe 4 and an exhaust pipe 5, both of which are connected to the cavity 2. The end of the exhaust pipe 5 near the cavity 2 is above the surface of the solution 3, and the end of the inlet pipe 4 near the cavity 2 extends below the surface of the solution 3. The tank body 1 is equipped with a first sensor 6 for detecting the pH value of the solution 3. The tank body 1 is also equipped with a replenishment pipe 7 and an outlet pipe 8, both of which are connected to the cavity 2. The replenishment pipe 7 is located above the surface of the solution 3, and the outlet pipe 8 is located at the bottom of the tank body 1. Both the replenishment pipe 7 and the outlet pipe 8 are equipped with valves 9 for controlling their opening and closing.

[0022] In this embodiment, solution 3 is water, the first sensor 6 is a pH sensor, one end of the suction pipe 5 is connected to the cavity 2, and the other end is connected to the vacuum pump. One end of the air inlet pipe 4 is connected to the outside, and the other end is connected to the cavity 2. The liquid outlet pipe 8 is connected to an external wastewater treatment device, which treats the discharged solution 3 to meet environmental protection requirements. The liquid replenishment pipe 7 is connected to the device storing solution 3.

[0023] The specific working process of this neutralization tank is as follows: The vacuum pump evacuates the chamber 2, creating a negative pressure inside the chamber 2. Since the external environment is a lead-acid battery manufacturing workshop, some acidic gases will mix with the air to form a mixed gas. The mixed gas enters the chamber 2 through the inlet pipe 4, the end of which extends below the liquid surface of the solution 3. The mixed gas first enters the solution 3, where the acidic gases in the mixed gas will dissolve in the solution 3, thus preventing the extracted gas from being acidic and corroding the vacuum tank.

[0024] During the process of vacuum pumping gas, the first sensor 6 continuously detects the pH value of the solution 3 in the neutralization tank. When the pH value of the solution 3 is less than the preset value (the preset value set in this embodiment is pH value 5), the valve 9 of the liquid outlet pipe 8 is opened to discharge the solution 3 in the cavity 2. After the solution 3 in the cavity 2 is completely discharged, the valve 9 of the liquid outlet pipe 8 is closed, and the valve 9 of the liquid replenishment pipe 7 is opened to replenish the cavity 2 with new solution 3, and then the pumping operation is restarted.

[0025] Preferably, the tank 1 is provided with a second sensor 10, which is used to detect the liquid level of the solution 3 in the cavity 2.

[0026] In this embodiment, the second sensor 10 is a liquid level sensor, which is installed at the bottom of the tank and detects changes in liquid level via a float. By setting the second sensor 10, a preset value for the liquid level of solution 3 is set during the replenishment of solution 3. When the liquid level of solution 3 reaches the preset value, the injection of solution 3 stops, thereby controlling the liquid level of solution 3. In this way, the injection volume of solution 3 can be controlled to be the same each time, ensuring that the end of the air inlet pipe 4 is below the liquid surface of solution 3. Moreover, this setting can meet the needs of tanks 1 of different sizes, eliminating the need to calculate the injection volume of solution 3 based on the volume of tank 1, thus controlling the liquid level height of solution 3.

[0027] Preferably, the system further includes a control unit, which is electrically connected to the first sensor 6, the second sensor 10, and the valve 9, respectively.

[0028] In this embodiment, the control unit is a PLC. By setting the control unit, it can receive detection signals from the first sensor 6 and the second sensor 10, and control the valves 9 of the replenishment pipe 7 and the outlet pipe 8 according to preset values. Simultaneously, the control unit also controls the vacuum pump, stopping the pumping operation when the solution 3 is replaced.

[0029] By setting a control unit, the pH value of solution 3 can be automatically and dynamically adjusted by changing the method of replacing solution 3. Specifically, during the process of vacuum pumping gas, the first sensor 6 continuously detects the pH value of solution 3, while the second sensor 10 continuously detects the liquid level of solution 3. When the pH value of solution 3 drops, the control unit controls the valve 9 of the replenishment pipe 7 to open, and new solution 3 enters the cavity 2 from the replenishment pipe 7, thereby increasing the pH value of solution 3. At the same time, the second sensor 10 sets a preset value for excessively high liquid level and a preset value for normal liquid level. When the liquid level of solution 3 in the cavity 2 rises to the preset value for excessively high liquid level after replenishment pipe 7, the control unit controls the valve 9 of the outlet pipe 8 to open, thereby discharging solution 3 from the cavity 2. When the liquid level of solution 3 in the cavity 2 drops to the preset value for normal liquid level, the valve 9 of the outlet pipe 8 is closed. In this way, not only can the pH value of solution 3 be dynamically adjusted, but the vacuum pump can also continue to pump gas while adjusting the pH value of solution 3.

[0030] Preferably, the air inlet pipe 4 includes a horizontal section 41 and a vertical section 42. The horizontal section 41 extends horizontally in the axial direction, one end of the horizontal section 41 is connected to the vertical section 42, and the other end extends to the outside of the tank 1. The vertical section 42 extends vertically in the axial direction and is located inside the cavity 2. The end of the vertical section 42 away from the horizontal section 41 extends below the liquid surface of the solution 3.

[0031] In this embodiment, the air inlet pipe 4 is L-shaped. Through the L-shaped air inlet pipe 4, the gas enters from the part above the liquid surface to the part below the liquid surface of the tank 1. The horizontal section 41 is above the liquid surface of the solution 3, and the end of the vertical section 42 extends to the part below the liquid surface of the solution 3. In this way, the solution 3 will not overflow from the horizontal section 41 of the air inlet pipe 4, thereby preventing the solution 3 from flowing back out of the tank 1.

[0032] Preferably, the outlet pipe 8 is equipped with a water pump 11, which is used to draw the solution 3 out of the cavity 2.

[0033] In this embodiment, since the cavity 2 is under negative pressure, a water pump 11 is installed on the liquid outlet pipe 8 to actively extract the solution 3 in the cavity 2, thereby ensuring that the solution 3 in the cavity 2 can be extracted. Moreover, the speed of extracting the solution 3 can be adjusted by adjusting the power of the water pump 11.

[0034] Preferably, the tank 1 is provided with a filter plate 12, the side wall of the filter plate 12 is connected to the inner wall of the cavity 2, and the filter plate 12 is located between the air extraction pipe 5 and the air inlet pipe 4.

[0035] In this embodiment, the filter plate 12 is connected to the inner wall of the cavity 2. When gas flows from the solution 3 to the suction pipe 5, the gas carries a small amount of moisture. After the gas passes through the filter plate 12, some of the moisture remains on the filter plate 12, thereby reducing the moisture content of the extracted gas. When too much moisture accumulates on the filter plate 12, it will drip back into the solution 3.

[0036] Example 2

[0037] refer to Figure 2 This embodiment is basically the same as embodiment 1, except that: there are multiple filter plates 12, the filter plates 12 are arranged obliquely on the inner wall of the cavity 2 in the vertical direction, the upper surfaces of the multiple filter plates 12 are parallel to each other, and the multiple filter plates 12 form a baffle channel 13.

[0038] In this embodiment, there are two filter plates 12. One side of each filter plate 12 is connected to the inner wall of the cavity 2, while the other side is suspended. The two filter plates 12 are parallel to each other. More specifically, the two filter plates 12 are arranged vertically, both located between the exhaust pipe 5 and the inlet pipe 4. The left side of the upper filter plate 12 is connected to the inner wall of the cavity 2, while the right side is suspended. The right side of the lower filter plate 12 is connected to the inner wall of the cavity 2 by welding or bolts, while the left side is suspended. This arrangement forms a baffle channel 13, increasing the contact time between the gas and the filter plates 12, allowing more moisture in the gas to accumulate on the filter plates 12, thereby reducing the moisture content of the gas entering the exhaust pipe 5. Furthermore, by tilting the filter plates 12, the moisture on the filter plates 12 can move in one direction, making it easier to accumulate into large water droplets, which then drip into the solution 3.

[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vacuum pump pre-neutralizing tank, comprising a tank body, a cavity is arranged in the tank body, a solution is stored in the cavity, the tank body is provided with an air inlet pipe and a gas extraction pipe, the air inlet pipe and the gas extraction pipe are communicated with the cavity, one end of the gas extraction pipe close to the cavity is located above the liquid level of the solution, and one end of the air inlet pipe close to the cavity extends below the liquid level of the solution, characterized in that, The tank is equipped with a first sensor for detecting the pH value of the solution. The tank is equipped with a replenishment pipe and a discharge pipe, both of which are connected to the cavity. The replenishment pipe is located above the liquid surface of the solution, and the discharge pipe is located at the bottom of the tank. Both the replenishment pipe and the discharge pipe are equipped with valves for controlling their opening and closing.

2. A vacuum pump pre-neutralizing tank according to claim 1, characterized in that, The tank is equipped with a second sensor, which is used to detect the liquid level of the solution in the cavity.

3. A vacuum pump pre-neutralizing tank according to claim 2, characterized in that, It also includes a control unit, which is electrically connected to the first sensor, the second sensor and the valve respectively.

4. The vacuum pump pre-neutralizing tank of claim 1, wherein, The air inlet pipe includes a horizontal section and a vertical section. The horizontal section extends horizontally in the axial direction, with one end connected to the vertical section and the other end extending outside the tank. The vertical section extends vertically in the axial direction and is located inside the cavity. The end of the vertical section away from the horizontal section extends below the liquid surface of the solution.

5. The vacuum pump pre-neutralization tank according to claim 1, characterized in that, The outlet pipe is equipped with a water pump, which is used to draw the solution out of the cavity.

6. The vacuum pump pre-neutralizing tank of claim 1, wherein, The tank is equipped with a filter plate, the sidewall of which is connected to the inner wall of the cavity, and the filter plate is located between the suction pipe and the intake pipe.

7. A vacuum pump pre-neutralizing tank according to claim 6, characterized in that, The filter plates are multiple in number and are arranged obliquely on the inner wall of the cavity in a vertical direction. The upper surfaces of the multiple filter plates are parallel to each other, and a baffle channel is formed between the multiple filter plates.

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